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Technical Fabrics HandbookHexForce™
ReinforcementsWoven Fabrics
Unidirectional Fabrics Non-Woven Fabrics
Glass Carbon Aramid Hybrids
REINFORCEMENTS FOR
COMPOSITESMANUFACTURING, SALES AND CUSTOMER SERVICE
Seguin, Texas1913 N. King St.
Seguin, TX 78155United States
Telephone: (830) 379-1580Fax: (830) 379-9544
Customer Service Toll Free(866) 601-5430
(830) 401-8180 Technical Service for Composite Reinforcement Fabrics
MANUFACTURINGFor European sales offi ce numbers and a full address list,
please go to:http://www.hexcel.com/contact/salesoffi ces
Les Avenieres, FranceZ.I. Les Nappes
38630 Les AvenieresFrance
www.hexcel.com
2INDUSTRIAL DISCLAIMER
For Industrial Use Only - In determining whether the material is suitable for a particular application, such factors as overall product design and the processing and environmental conditions to which it will be subjected should be considered by the User. The following is made in lieu of all warranties, expressed or implied: Seller’s only obligations shall be to replace such quantity of this product which has proven to not substantially comply with the data presented in this bulletin. In the event of the discovery of a nonconforming product, Seller shall not be liable for any commercial loss or damage, direct or consequential arising out of the use of or the inability to use the product. Before using, User shall determine the suitability of the product for their intended use and User assumes all risks and liability whatsoever in connection therein. Statements relating to possible use of our product are not guarantees that such use is free of patent infringement or that they are approved for such use by any government agency. The foregoing may not be changed except by an agreement signed by an offi cer of Seller.
Kevlar® is a registered trademark of E.I. DuPont de Nemours.S-2 Glass® is a registered trademark of AGY Holding CorporationTwaron® is a registered trademark of Teijin Twaron USA, Inc.
3
Company ........................................................................... 4Parameters for Woven Fabric Selection ............................ 5The Process - Converting Yarn to Fabric ........................... 8CARBON FIBER FABRICS .............................................. 11 Physical Properties of Selected PAN Carbon Fibers ... 14 Aerospace Carbon Fabric Construction Data ............. 15 Commercial Carbon Fabric Construction Data ........... 17 Heatset Uni Construction Data .................................... 18 Tweltex Carbon Fabric Construction Data .................. 20FIBER GLASS FABRICS ….............................................. 21 Physical Properties of Fiber Glass ............................... 22 Industrial Applications for Fiber Glass Fabric .............. 24 Fiber Glass Yarn Nomenclature ................................... 26 Glass Composition (Table I) ......................................... 27 Basic Glass Yarn Strands (Table II) .............................. 28 Ultra High Performance Glass Products ...................... 29 Fiber Glass Fabric Finishes ......................................... 31 Others Finishes and Special Processes ...................... 34FIBER GLASS FABRIC CONSTRUCTION DATA .…........ 35 Fiber Glass Fabrics ...................................................... 36 Fiber Glass Fabric Weight Index .................................. 45 Fiber Glass Fabric Thickness Index ............................ 48ARAMID FABRICS ........................................................... 51 Physical Properties of Aramid Fabrics ......................... 52 Applications of Aramid Fabrics ................................... 53 Aramid Fibers Nomenclature ....................................... 54 Aramid Fabric Finishes ................................................ 55ARAMID FABRIC CONSTRUCTION DATA ..................... 57 Aramid Fabrics Styles ................................................. 58SPECIALTY AND HYBRID COMPOSITE REINFORCEMENTS .................................................... 61 Specialty and Hybrid Reinforcement Materials ........... 62 Hybrid Composite Fabrics ........................................... 64 Lightning Strike Fabrics ............................................... 65 Specialty Fabrics ......................................................... 66TECHNICAL REFERENCE .............................................. 67SPECIFICATIONS ............................................................ 71SELECTED CONVERSIONS AND FORMULAS .............. 74
4COMPANY PROFILE
Hexcel Corporation is a leading advanced composites company. It develops, manufactures and markets lightweight, high-performance structural materials, including carbon fibers, reinforcements, prepregs, honeycomb, matrix systems, adhesives and composite structures, used in commercial aerospace, space and defense and industrial applications such as wind turbines.
As the most vertically integrated supplier in the industry, Hexcel is better able to control the cost, quality and delivery of its products. Vertical integration also means that we can offer enhanced design flexibility and support to our customers worldwide.
Hexcel’s research and technology function supports our businesses worldwide with a highly developed expertise in materials science, textiles, process engineering, and polymer chemistry.
Hexcel manufactures a wide range of reinforcements for the manufacture of structural composites used in aerospace, military, transportation and industrial applications. Reinforcements in the form of fabrics or non-wovens are made using a variety of high performance fibers, including glass, carbon, aramids, and specialty reinforcements.
5PARAMETERS FOR WOVEN
FABRIC SELECTION
In selecting a woven fabric for industrial applications, a number of design parameters may be considered. These are broken down into four basic variables: yarn weight, thread count, weave pattern and fabric fi nish. The wide range of fi ber glass yarn weights, as well as the yarn counts available in Kevlar® and Twaron®, provides the base for fabric design. Yarn weight, combined with thread count [the number of warp ends (lengthwise) and fi lling picks (widthwise) per inch] determines the strength, weight and thickness of the fabric.
Basic weaving concepts are utilized in the manufacture of fi ber glass and high performance fabrics. The technology, however, is advanced to incorporate specialized precision equipment to meet the exacting demands of modern industry. Almost any weave can be woven; however, for industrial purposes there are six basic patterns as described below.
PlainThe plain weave consists of yarns interlaced in an alternating fashion one over and one under every other yarn. The plain weave p r o v i d e s g o o d f a b r i c stability but is generally the least pliable.
6 BasketThe basket weave is similar to the plain weave except that two or more warp yarns and two or more fi lling yarns are alternately interlaced over and under each other. The basket weave is more pliable, fl atter and stronger than the plain weave, but is not as stable.
LenoThe leno weave is used where relatively low numbers of yarns are involved. The leno weave locks the yarns in place by crossing two or more warp threads over each other and interlacing with one or more fi lling threads.
The four harness satin weave is more pliable than the plain weave and is easier to conform to curved surfaces typical in reinforced plastics. In this weave pattern there is a three-by-one interfacing where a filling yarn floats over three warp yarns and under one.
Four Harness Satin (Crowfoot)
7Eight Harness SatinThe eight harness satin is similar to the four harness satin except that one fi lling yarn fl oats over seven warp yarns and under one. This is a very pliable weave and is used for forming over curved surfaces.
Twill WeaveThe twill weave is more pliable than the plain weave and has better drapability whi le maintaining more fabric stability than a four or eight harness satin weave. The weave pattern is characterized by a diagonal rib created by one warp yarn floating over at least two fi lling yarns.
8
1. WarpingThe first step in the warping stage is beaming, where purchased yarn is transferred from the bobbin creel to section beams. Most input yarn is in singles form; however, some yarn is twisted and plied together to yield unique properties. The section beams constitute the machine direction or thread sheet segment of yarn in the loom. Several section beams are produced and consolidated into a group called a set, which provides the input for the slashing process.
2. SlashingThe slashing process combines the warp ends of the set’s multiple section beams into a single beam for weaving called a warp or loom beam. Sizing is applied to the threadsheet filaments and to avoid abrasion of individual strands.
3. EnteringThe final stage of preparation is entering, where the warp is set up for installation in the loom. A warp can contain over 4,500 individual ends, depending on the design of the style. Each warp end is drawn through a drop wire, heddles and a reed, either by hand or by machine. These parts work together to mechanically arrange and control the warp yarn spreadsheet during the weaving process on the loom.
THE PROCESSCONVERTING YARN TO FABRIC
94. WeavingAfter the warp beam is installed in the loom, then either rapier technology for heavy fabrics, or air jet technology for lighter fabrics is used to interlace the filling yarns at 90 degree angles to the warp ends on the loom. The fabric, called greige or loom state, is then wound onto a roll or steel drums called mandrels, and the weaving process is complete.
5. Heat CleaningThe next stage is batch oven cleaning, where the mandrels are placed on racks, loaded into large ovens, and exposed to high temperatures until all organic binders are removed and a pure clean glass fabric is produced. Organic, polymer-based fabrics are not exposed to this process (fabrics of Kevlar®/Twaron® fibers).
6. FinishingIn the finishing stage a coupling agent (finish) or chemical treatment is applied to the fabric, and the finished glass is ready for use. The finish serves to provide optimum adhesion between the fiber surface and the matrix resin, to provide fabric stability and protection (weave set), or to provide chemical protection and resistance.
10
11
CARBON FIBERFABRICS
12
Hexcel manufactures the most complete line of carbon fabrics and specialty reinforcements for the composite industry and offers a thorough line of globally certified aerospace products.
Carbon fiber reinforcements, when properly engineered into the right matrix, can achieve one of the strongest and most rigid composite structures available with significant weight savings when compared to metals and other materials.
In addition to the high strength-to-weight ratio, carbon fiber reinforcements are thermally and electrically conductive, have very low CTE and excellent fatigue resistance.
Hexcel Corporation can provide users with a wide variety of commercially available fabrics and specialty reinforcements with different ranges of tensile strength, modulus, and thermal/electrical conductivities.
Our fabric product line includes traditional 0/90 fabrics, +/-45 degree fabrics, flat-tow 12K fabrics (Twelvtex), heat-set uni directional fabrics, multi-layered stitch bonded fabrics, lightning strike (LS) fabrics, double-weave fabrics, and hybrid (multiple fibers) fabrics woven with standard modulus or IM fibers. Many of these fabrics are qualified to major aerospace programs with listings on specifications, such as BMS9-8, BMS9-17, 5PTMCT01, LMACT01, etc. and are available with our enhanced surface treatments such as “ZB.”
In many end products it is desirable to have a lower crimp fabric to reduce resin-rich areas. Hexcel’s “ZB” finishing process for carbon fabrics will gives a more uniform spread where the filaments in each tow are spread out
CARBON FABRICS
13
creating a thinner and more closed fabric that can give you better mechanicals and less porosity in a composite. “ZB” can also be used to lower the mass in a composite where lighter weight is the key characteristic.
Our Specialty Reinforcements product line includes a number of different technologies that produce an endless variety of carbon-reinforced designs for preform products and composite needs. (See “Specialty Reinforcements Materials” in this section.)
Hexcel’s staff, with expertise in the areas of textile development, finishing technology, resin chemistry, composite technology, and applications engineering, is readily available to investigate development requirements for engineered fabrics, coated fabrics, and specialty composite-reinforced structures.
Often a process is limited by the use of “off-the-shelf” textile reinforcements. Hexcel offers the development consultation services required to best tailor the textile component to the final product. Throughout Hexcel’s history our product development staff has worked closely with our customers to create innovative solutions to unique requirements. For technical questions, dial (830) 401-8180.
14
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21
FIBER GLASSFABRICS
22
PHYSICAL PROPERTIESOF FIBER GLASS
The versatility of glass as a fiber makes it a unique industrial textile material. Fiber glass in fabric form offers an excellent combination of properties from high strength to fire resistance. Wide ranges of yarn sizes and weave patterns provide unlimited design potential, allowing the end user to choose the best combination of material performance, economics and product flexibility.
Dimensional StabilityFiber glass is a dimensionally stable engineering material. Fiber glass does not stretch or shrink after exposure to extremely high or low temperature. The maximum elongation for “E” glass at break is 4.8 percent with a 100 percent elastic recovery when stressed close to its point of rupture.
Moisture ResistanceGlass fibers do not absorb moisture, and do not change physically or chemically when exposed to water.
High StrengthThe high strength-to-weight ratio of fiber glass makes it a superior material in applications where high strength and minimum weight are required. In textile form, this strength can be unidirectional or bidirectional, allowing flexibility in design and cost.
Fire ResistanceFiber glass is an inorganic material and will not burn or support combustion. It retains approximately 25 percent of its initial strength at 1,000ºF.
23
Chemical ResistanceMost chemicals have little or no effect on glass fiber. The inorganic glass textile fibers will not mildew, rot or deteriorate. Glass fibers are affected by hydrofluoric, hot phosphoric acids and strong alkaline substances.
Electrical PropertiesFiber glass is an excellent material for electrical insulation. The combination of properties, such as low moisture absorption, high strength, heat resistance and low dielectric constant, makes fiber glass fabrics ideal as a reinforcement for printed circuit boards and insulating varnishes.
Thermal ConductivityA low coefficient of thermal expansion combined with high thermal conductivity properties make glass fabrics a dimensionally stable material that rapidly dissipates heat as compared to asbestos and organic fibers.
24
INDUSTRIAL APPLICATIONSFOR FIBER GLASS FABRIC
Fiber glass fabrics are used in a wide range of industrial applications. High strength, dimensional stability, design flexibility and excellent electrical properties are some of the characteristics that ensure optimum performance and economy with this highly engineered material.
Reinforced Plastics Fiber glass fabrics used as reinforcement for plastics have replaced traditional materials, such as wood, steel, and aluminum, in a vast array of products. The inherent strength, light weight, dimensional stability and low tooling costs derived from fiber glass reinforced plastics help make many products more durable, attractive and maintenance free.
Electrical Fiber glass fabrics offer outstanding performance to the electrical industry. High strength, dimensional stability, temperature resistance and excellent electrical properties provide the basis for use as the prime reinforcement in high pressure laminates for printed circuit boards. Fiber glass fabrics coated with chemistry, such as epoxy, silicone, rubber, Teflon® and neoprene, as well as reinforcing mica products, provide the long-term durability and reliability needed in insulating high-voltage generators, transformers, switches and cables.
25
Coated and Laminated Fabrics High strength, dimensional stability, fire resistance and low cost are some of the advantages of using fiber glass fabrics to reinforce foils, plastic film and coatings. Protective covers, vapor barriers, window shades, movie screens, packaging tapes, awnings, protective clothing, gaskets, wall covering and conveyor belts are just some of the products that are improved through the use of fiber glass fabrics.
Thermal Insulation Strength retention at high temperatures, corrosion and fire resistance, and ease of handling make fiber glass fabrics an important material for thermal insulation. Both the U.S. Navy and commercial shipyards use fiber glass fabrics almost exclusively as pipe lagging and for thermal pad covers.
Construction From pipe wrap to wallboard seaming tape, fiber glass fabrics can be found throughout the construction industry. Fiber glass scrim is used to reinforce paper and film for insulation facings and to provide dimensional stability to asphalt used on roofing, roadways and bridge decks. Fabric structures, such as tennis courts, sports centers and football stadiums, use coated fiber glass fabrics as an economical way to encapsulate space.
26
FIBER GLASS YARNNOMENCLATURE
The wide variety of fiber glass yarns produced requires a special system of nomenclature for identification. This nomenclature consists of two parts—one alphabetical and one numerical. In addition, although the final result is the same, there are differences between the customary U.S. Systems and the TEX/Metric System.
U.S. SystemExample: ECG 150-1/2
A. First Letter - “E” characterizes the glass composition (see Table I).
B. Second Letter - “C” indicates the yarn is composed of continuous filaments. “S” indicates staple filament. “T” indicates texturized continuous filaments.
C. Third Letter - Denotes the individual filament diameter: BC, D, DE, E, G, H, K (see Table II).
D. First Number - Represents 1/100 the normal bare glass yardage in one pound of the basic yarn strand. In the above example, multiply 150 by 100 which results in 15,000 yards in one pound (see Table II).
E. Second Number - Represents the number of basic strands in the yarn. The first digit represents the original number of twisted strands. The second digit separated by the diagonal represents the number of strands plied (or twisted) together. To find the total number of strands used in a yarn, multiply the first digit by the second digit (a zero is always multiplied as 1).
27
Composition E Glass S-2 Glass®
Silicon Dioxide 52-56% 64-66
Calcium Oxide 16-25%
Aluminum Oxide 12-16% 24-26%
Boron Oxide 8-13%
Sodium & Potassium Oxide 0-1%
Magnesium Oxide 0-6% 9-11%
TABLE IGlass Composition–By Weight
Fiber glass yarns are available in different formulations. “E” glass (electrical) is the most common all-purpose glass, while “S-2” Glass® (high strength) is used for special applications.
TEX/Metric SystemExample: EC9 33 1X2
A. First Letter - “E” characterizes the glass composition (see Table I).
B. Second Letter - “C” indicates continuous filament. “T” indicates textured continuous filament. “D” indicates staple filament.
C. First Number - Denotes the individual filament diameter (see Table II) expressed in micrometers (microns).
D. Second Number - Represents the non-linear weight of the bare glass strand expressed in TEX. TEX is the mass in grams per 1,000 meters of yarn (see Table II).
E. Third Number - Indicates yarn construction or the basic number of strands in the yarn. The first digit represents the original number of twisted strands and the second digit after the “X” indicates the number of these strands twisted or plied together.
28
U.S. Designation
(inches)
Metric (microns)
U.S. x100= yd/lb
Designated TEX
Number of
Filaments
BC 0.00017 4 150 33 1064
D 0.00023 5 1800 2.75 51
900 5.5 102
450 11 204
225 22 408
DE 0.00025 6 300 16.5 204
150 33 408
100 50 612
75 66 816
50 99 1224
37 134 1632
E 0.00029 7 225 22 204
110 45 408
G 0.00036 9 150 33 204
75 66 408
50 99 612
37 134 816
H 0.00043 10 25 198 816
K 0.00051 13 18 275 816
TABLE IIGlass Composition–By Weight
Filament Diameter Strand Weight
29
ULTRA HIGH PERFORMANCE GLASS PRODUCTS
The HT fabrics are fashioned after the standard, high volume E-Glass aerospace 7781 and 120 styles. Complimenting these styles in fabric areal weight and weave pattern, 6781HT and 220HT have similar characteristics in fabric hand, flexibility, weight, and thickness, but with the added benefit of superior impact resistance, tensile strength, and bond integrity using S-2 Glass® fiber.
The dry fabric tensile strength for HT fabrics is dramatically higher than typical S-2 Glass® fabrics made with standard starch oil sizing. Starch oil size fabrics require heat cleaning prior to finishing, significantly reducing fiber tensile strength. The HT fabrics have a simple yet effective organic sizing compatible with high temperature Epoxy, BMI, Phenolics, Cynate Esters, Thermoplastics, Polyamide, Polyimide, PEI, PEEK, PAI, LCP and others.
0
100
200
300
400
500
600
700
ksi
Warp Fill
S-2 Glass® 6781 Dry Fabric Tensile Strength Comparison
6781 Finished 6781HT
30
With the superior results of the HT products on 6781 and 220, Hexcel has expanded to direct size applications on E-Glass 7781. This direct size product demonstrates superior tensile strength when compared to typical E-Glass 7781 fabric.
E-Glass 7781 Dry Fabric Tensile Strength Comparison
0
100
200
300
400
500
600
700
7781 Finished 7781 Direct Size
ksi
Warp Fill
31
FIBER GLASS FABRIC FINISHES
Fiber Glass Fabrics are available with a variety of finishes and treatments.
Greige: Loom state fabric that includes the organic binders and size applied to the yarn prior to weaving.
Carmelized: Partially heat cleaned fabric in which the organic binders and size are only partially volatilized.
Finished: Fully heat cleaned fabric treated with the coupling agent which provides a chemical bond between the fiber glass surface and various matrix resins.
The following finish charts offer recommended Hexcel finishes based on compatibility with resin systems and include special finish processes.
32
HexcelFinish
RecommendedMatrix Resin(s)
PossibleMatrix Resin(s)
PerformanceFeatures
F69 EpoxyPolyester
Silane finish for epoxy composites resins BMS 9-3 Qualified.
F81 EpoxyPolyesterVinyl EsterUrethaneCyanate Ester
BMIPhenolic
Multifunctional silane for use with all major resin systems. Used for surfboard finish.
Z-6040/F46
Epoxy Phenolic Silane finish compatible with epoxy resins.
CS-767 EpoxyPolyimideBTUrethaneVinyl Ester
Cyanate EsterPolyester
Unique multifunctional capability for use with all major resin systems.Excellent wetting characteristics.
CS-724 Epoxy Specially developed finish for structural composites. BMS 9-3 Qualified.
CS-310 Epoxy Silane finish BMS 9-3 Qualified.
CS-550/Volan
PolyesterEpoxyPhenolic
Vinyl Ester Volan/Silane finish for structural polyester/vinyl ester and phenolic resins. Fabric will have a green tint from the Volan. Volan is BMS 9-3 Qualified.
F50 PolyesterEpoxy
Vinyl EsterCyanate EsterPhenolic
Volan/Silane finish. Fabric will have green tint from the Volan. BMS 9-3 Qualified.
Hexcel Fiber Glass Finishes
33
HexcelFinish
RecommendedMatrix Resin(s)
PossibleMatrix Resin(s)
PerformanceFeatures
F3/F16 PolyesterVinyl Ester
EpoxyPhenolic
Volan finish compatible with structural epoxy, polyester/vinyl ester and phenolic resins. Fabric will have green tint from the Volan. F3 is BMS 9-3 Qualified.
F43 Polyester Vinyl Ester Silane finish compatible with polyester and vinyl ester resin systems.
F72 Polyester Silane finish.
A1100/F40
PhenolicAcrylic
UrethaneEpoxy
Silane Finish recommended forphenolic resins.
A1100S Phenolic UrethaneEpoxy
A1100 finish with soft hand.
CS-4667 Phenolic Silane finish for phenolic applications.
F48 Silicone Silicone high temperature release finish, applied to fabric style 1B301 only.
Hexcel Fiber Glass Finishes (continued)
34
Other Finishes and Special Processes
HexcelFinishes
PerformanceFeatures
Greige Loom state fabric. No additional fabric finish processing. Used for coating applications.
F12 Heat cleaned fabric for silicone processes.
RWG “Really White Glass”- surfboard fabric with resin compatible binder for polyester.
"HT" Direct size fabric that is very stable in high temperature applications and can be used in a wide variety of resins.
35
Hexcel reserves the right to use equivalent yarns in fiber glass styles. The use of such yarns is designed to maintain the physical properties of the woven cloth. The values listed for weight, thickness, and breaking strengths are typical greige values, unless otherwise noted.
FIBER GLASSFABRIC
CONSTRUCTIONDATA
36
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Tech
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vice
Rep
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ntat
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Ele
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nic,
GI &
Bal
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Fab
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(864
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6 -
Com
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Pla
in81
8E
CG
75
1/2
Dac
ron
R-1
413
.09
444
11.9
0.30
825
10
8800
4H F
ancy
Len
o17
(8)
8E
CG
150
1/0
-EC
G 3
7 1/
3E
CG
37
1/3
8.23
279
17.8
0.45
425
450
7629
0P
lain
4431
EC
G 7
5 1/
0E
CG
67
1/0
6.27
213
7.0
0.18
350
350
Fib
er G
lass
Fab
rics
(co
ntin
ued
)
Styl
eW
eave
Coun
t W
arp
Coun
t Fi
llW
arp
Yard
Fill
Yarn
Wei
ght
(oz/
yd2 ) (
g/m
2 )Th
ickn
ess
(mils
) (m
m)
War
p F
illSt
reng
th(lb
f/in
) (lb
f/in
)
The
phy
sica
l pro
per
ties
liste
d a
re t
ypic
al fo
r gr
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(unt
reat
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or a
dd
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form
atio
n p
leas
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Tech
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Rep
rese
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Ele
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GI &
Bal
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Fab
rics
(864
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6 -
Com
pos
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45
104
0.57
19
1071
0.60
20
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0.71
24
106
0.73
25
1037
0.73
25
1297
0.81
27
1067
0.91
31
1299
0.92
31
1076
0.96
33
1070
1.05
36
6060
1.19
40
1080
1.41
48
108
1.43
48
6080
1.44
49
1609
1.48
50
1620
1.58
54
1658
1.60
54
1659
1.60
54
1280
/108
61.
6054
1562
1.82
62
112
2.10
71
2112
2.10
71
1608
2.22
75
1614
2.33
79
2113
2.34
79
1610
2.37
80
117
2.40
81
2313
2.40
81
4180
2.41
82
1611
2.42
82
3313
2.43
82
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2.50
85
1636
2.60
88
2125
2.60
88
1125
2.65
90
1628
2.69
91
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2.69
91
3070
2.74
93
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2.85
97
1675
2.85
98
220
HT
3.06
104
2116
3.12
106
116
3.16
107
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3.16
107
1692
3.18
108
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3.20
108
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3.22
109
1520
3.52
119
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3.54
120
1695
3.59
122
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3.59
122
7579
3.61
122
2165
3.62
123
4522
3.64
123
1131
3.65
124
1522
3.67
124
1579
3.68
125
1165
3.70
125
4527
3.70
125
1632
3.75
127
1167
3.77
128
1161
3.85
131
1676
4.10
139
477
4.11
139
1652
4.15
141
2157
4.32
146
4700
4.40
149
1064
4.62
157
4797
4.63
157
4985
4.70
159
2166
4.80
163
7630
4.83
164
Fib
er G
lass
Fab
ric
Wei
ght
Ind
ex
Sty
le
oz/y
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le
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4.95
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5.21
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5.26
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5.30
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5.40
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193
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197
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5.93
201
7255
6.00
203
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6.03
204
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206
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6.20
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6.25
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7629
06.
2721
3
138
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222
7642
6.84
232
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6.89
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7.09
240
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7.25
246
7715
7.30
248
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7.50
254
1568
7.97
270
8800
8.23
279
1142
8.37
284
7520
8.37
284
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8.40
285
3743
8.45
287
1311
8.48
288
6543
8.50
288
341
8.64
293
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8.69
295
520
8.70
295
6581
8.75
297
1581
8.79
298
7725
8.80
298
7781
8.81
299
6781
8.92
302
7581
8.94
303
6781
HT
9.02
306
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9.33
316
7500
9.41
319
1507
10.3
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9
3734
10.3
835
2
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5
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9
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11.5
839
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162
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7
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7
1527
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541
2
1564
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0
232
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332
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543
2
333
13.0
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8000
13.0
944
4
1530
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044
8
1582
13.6
346
2
3582
13.7
046
5
7645
14.3
148
5
Fib
er G
lass
Fab
ric
Wei
ght
Ind
ex (c
ont
inue
d)
S
tyle
oz
/yd2
(g
/m2 )
S
tyle
oz
/yd2
(g
/m2 )
S
tyle
oz
/yd2
(g
/m2 )
S
tyle
oz
/yd2
(g
m2 )
47
3783
16.0
854
6
7547
16.2
455
1
1583
16.5
256
0
2025
17.0
557
8
7594
17.8
360
5
7544
18.0
061
2
7587
19.7
066
8
1884
25.4
086
1
3784
25.7
987
4
1584
26.0
088
2
1938
26.8
090
9
3884
27.0
091
5
7597
38.0
012
89
1597
38.5
713
08
3788
52.3
017
73
Fib
er G
lass
Fab
ric
Wei
ght
Ind
ex (c
ont
inue
d)
S
tyle
oz
/yd2
(g
/m2 )
S
tyle
oz
/yd2
(g
/m2 )
S
tyle
oz
/yd2
(g
/m2 )
S
tyle
oz
/yd2
(g
m2 )
48
477
4.7
0.12
1676
4.8
0.12
1131
5.0
0.13
1161
5.0
0.12
1614
5.0
0.13
1694
5.1
0.12
4522
5.1
0.13
1692
5.2
0.12
7579
5.2
0.13
1522
5.3
0.12
1500
5.3
0.13
1501
5.3
0.14
1695
5.4
0.14
4579
5.4
0.14
1557
5.5
0.14
3731
5.5
0.14
7630
5.5
0.15
1047
5.6
0.14
104
1.1
0.03
993
1.2
0.03
1071
1.2
0.03
1037
1.3
0.03
1067
1.3
0.03
106
1.5
0.04
1076
1.8
0.05
6060
1.9
0.05
1070
2.0
0.05
1297
2.0
0.05
6080
2.0
0.05
1080
2.2
0.06
1299
2.2
0.06
1280
/108
62.
40.
06
108
2.5
0.06
117
2.6
0.07
1609
2.6
0.07
2113
2.8
0.07
2112
3.0
0.08
2313
3.0
0.08
4180
3.0
0.08
112
3.2
0.08
1620
3.2
0.08
1669
3.2
0.09
3313
3.2
0.08
2114
3.3
0.08
1628
3.4
0.09
3070
3.4
0.09
220
HT
3.4
0.09
120
3.5
0.09
220
3.5
0.09
1608
3.5
0.09
2116
3.5
0.10
2125
3.5
0.09
1125
3.6
0.09
116
3.8
0.10
1610
4.0
0.10
1611
4.0
0.10
1636
4.0
0.09
1658
4.0
0.10
1674
4.0
0.10
4527
4.0
0.10
2165
4.2
0.10
1165
4.2
0.11
1167
4.2
0.11
1659
4.2
0.11
1675
4.3
0.11
1678
4.3
0.11
1520
4.3
0.11
1562
4.5
0.11
1579
4.5
0.11
1652
4.5
0.11
1632
4.7
0.12
4700
4.7
0.12
Fib
er G
lass
Fab
ric
Thi
ckne
ss In
dex
S
tyle
m
ils
mm
S
tyle
m
ils
mm
S
tyle
m
ils
mm
S
tyle
m
ils
mm
49
6580
5.6
0.15
1064
5.7
0.14
6557
5.8
0.15
2157
5.9
0.15
2166
6.0
0.15
4526
6.0
0.15
7626
6.0
0.15
1680
6.1
0.15
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6.2
0.16
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6.2
0.16
7628
6.8
0.17
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6.9
0.16
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7.0
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0.18
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7629
07.
00.
18
1035
7.1
0.18
7533
7.3
0.20
4533
7.4
0.19
4797
7.4
0.19
7715
7.7
0.20
1543
7.8
0.20
7580
7.8
0.20
3780
7.9
0.20
3733
8.0
0.20
3743
8.0
0.20
341
8.2
0.21
7652
8.3
0.21
1581
8.5
0.22
7635
8.5
0.22
7781
8.6
0.22
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8.9
0.23
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9.0
0.23
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9.1
0.23
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9.1
0.23
7725
9.3
0.24
6781
9.5
0.24
7637
9.6
0.24
6781
HT
9.6
0.24
1311
9.7
0.25
2532
10.0
0.25
7532
10.0
0.25
1142
10.3
0.26
6581
10.4
0.26
3434
10.9
0.28
7642
11.0
0.28
1576
11.1
0.28
1800
11.1
0.28
7520
11.4
0.29
7500
11.8
0.30
8000
11.9
0.30
1188
12.0
0.30
7562
12.5
0.32
1582
12.7
0.32
2523
13.0
0.33
7645
13.4
0.34
1523
13.6
0.35
162
13.8
0.35
232
14.0
0.36
332
14.0
0.36
333
14.0
0.36
1527
14.3
0.36
3582
14.4
0.37
3734
14.4
0.37
1530
15.0
0.38
1564
15.0
0.38
7547
15.5
0.39
3783
15.7
0.40
1583
16.2
0.41
Fib
er G
lass
Fab
ric
Thi
ckne
ss In
dex
(co
ntin
ued
)
S
tyle
m
ils
mm
S
tyle
m
ils
mm
S
tyle
m
ils
mm
S
tyle
m
ils
mm
50
1568
16.5
0.42
7594
16.5
0.42
8800
17.8
0.45
7544
19.1
0.49
3784
24.2
0.61
1584
24.6
0.62
1507
25.0
0.64
1884
26.0
0.66
3884
26.0
0.66
2025
26.2
0.67
1938
26.6
0.68
7587
27.2
0.69
1597
37.8
0.96
7597
40.2
1.02
3788
48.7
1.24
Fib
er G
lass
Fab
ric
Thi
ckne
ss In
dex
(co
ntin
ued
)
S
tyle
m
ils
mm
S
tyle
m
ils
mm
S
tyle
m
ils
mm
S
tyle
m
ils
mm
51ARAMIDFABRICS
52
PHYSICAL PROPERTIES OF ARAMID FIBERS
Aramids – Kevlar®, Twaron®
High Strength Aramid fibers are 43 percent lighter than fiber glass, with a density of 1.44 g/cc compared to 2.55 g/cc for fiber glass. Aramids are twice as strong as E-Glass, ten times as strong as aluminum and approach the strength of high strength carbon on a specific tensile strength basis.
Dimensional Stability Aramids display excellent dimensional stability with a slightly negative coefficient of thermal expansion (-2.4 X 10-6/˚C).
Chemical Resistance Aramids resist chemicals with the exception of a few strong acids and alkalis.
Thermal Stability Aramids display excellent stability over a wide range of temperatures for prolonged periods. They show essentially no embrittlement or strength loss at temperatures as low as -320˚F (-196˚C). Aramids do not melt or support combustion but will start to carbonize at approximately 800˚F (427˚C).
53
APPLICATIONS OF ARAMID FABRICS
AerospaceHexcel manufactures aramid fabrics for use in aerospace applications. Aramid fabrics are used in aerospace ducting where low weight and strength are important. They are also used for secondary structures and containment cases where impact resistance is key.
Marine, Tooling and Recreational Products Hexcel’s aramid fabrics, exhibiting the properties of high strength and durability, are used in the recreational industry in a variety of applications ranging from boating to skiing. The market for recreational products is a dynamic market driven by strength, durability, clarity and cost. Hexcel’s products are used in the manufacture of kayaks, boats, hydroplanes, canoes and a wide range of other recreational products where strength and low weight are essential.
54
ARAMID FIBERS NOMENCLATURE
Aramid Fibers are typically designated by denier, tex or decitex (dtex). Each is described below.
Denier The denier system is used internationally to measure the size of silk and synthetic filaments and yarns. Denier number indicates the weight in grams of 9,000 meters of filament or filament yarn. For example, if 9,000 meters of yarn weigh 100 grams, it is a 100-denier yarn. The smaller the denier number, the finer the yarn.
Denier = dtex X 0.9
Tex The tex system is also applicable to the measurement of filament yarns. It is based on the weight in grams of one kilometer 3,300 feet of yarn. Decitex (dtex), is defined as ten times tex.
Tex = dtex/10 Dtex = Tex X 10 = denier/0.9
For example, 840 denier yarn may also be designated as 933 dtex.
55
Hexcel Finish Performance Features
CS-800/F100 Scour finish for Aramid fabric.
Greige Loom state fabric. No additional fabric finish processing.
ARAMID FABRIC FINISHES
56
57
ARAMIDFABRIC
CONSTRUCTIONDATA
58
328
328
Pla
in17
17K
evla
r 49
1420
den
ier
Kev
lar
49
1420
den
ier
6.4
217
12.0
0.30
700
750
345
124
4H S
atin
3434
Kev
lar
4919
5 d
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rK
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195
den
ier
1.7
583.
00.
0821
021
0
348
181
8H S
atin
5050
Kev
lar
4938
0 d
enie
rK
evla
r 49
380
den
ier
4.9
166
8.7
0.22
660
650
350
120
Pla
in34
34K
evla
r 49
195
den
ier
Kev
lar
4919
5 d
enie
r1.
758
3.0
0.08
260
260
351
220
Pla
in22
22K
evla
r 49
380
den
ier
Kev
lar
4938
0 d
enie
r2.
275
4.0
0.10
294
298
352
281
Pla
in17
17K
evla
r 49
11
40 d
enie
rK
evla
r 49
1140
den
ier
5.1
173
9.3
0.24
624
643
353
285
Cro
wfo
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17K
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r 49
1140
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ier
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lar
4911
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117
39.
00.
2368
067
0
354
Pla
in13
13K
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r 49
1420
den
ier
Kev
lar
4914
20 d
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r4.
916
610
.00.
2556
860
0
372
Twill
4x4
72
72K
evla
r 49
195
den
ier
Kev
lar
4919
5 d
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812
97.
20.
1855
057
5
383
5H S
atin
1616
Kev
lar
4921
60 d
enie
rK
evla
r 49
2160
den
ier
9.4
319
13.0
0.33
104
104
Ara
mid
Fab
ric
Sty
les
Hexc
el
Styl
eAM
S St
yle
Wea
veCo
unt
War
p
Fill
War
p Ya
rnFi
ll Ya
rnW
eigh
t(o
z/yd
2 ) (g/
m2 )
Thic
knes
s(m
ils) (
mm
)
Brea
king
St
reng
th(lb
f/in
) (lb
f/in
)
59
384
1050
Bas
ket
4x4
2828
Kev
lar
4914
20 d
enie
rK
evla
r 49
1420
den
ier
10.7
363
19.0
0.48
1360
1300
386
Bas
ket
4x4
2722
Kev
lar
4921
60 d
enie
rK
evla
r 49
2160
den
ier
13.6
461
25.0
0.64
1826
1473
388
1033
Bas
ket
8x8
4040
Kev
lar
4914
20 d
enie
rK
evla
r 49
1420
den
ier
15.3
519
26.9
0.68
1830
1790
1629
(Bla
ck)
Pla
in14
14K
evla
r 10
015
00 d
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015
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217
610
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2677
578
5
5328
328
Pla
in17
17Tw
aron
220
015
80 d
tex
Twar
on 2
200
1580
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x6.
421
712
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3070
075
0
5348
181
8H S
atin
5050
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055
405
dte
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105
540
5 d
tex
4.9
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8.0
0.20
660
650
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220
Pla
in22
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105
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5 d
tex
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275
4.0
0.10
295
300
5352
281
Pla
in17
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220
012
70 d
tex
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3
5353
285
Cro
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220
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tex
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2362
363
5
5354
Pla
in13
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aron
220
015
80 d
tex
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200
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916
610
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2556
860
0
The
phy
sica
l pro
per
ties
liste
d a
re t
ypic
al fo
r gr
eige
(unt
reat
ed) f
abric
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SPECIALTYAND HYBRIDCOMPOSITE
REINFORCEMENTS
62
Multi-Axial Broadgoods NCF-NON-CRIMP FABRIC: Multi-axial material constructed in layers without crimp that are stitched together into a single ply stack.
• Rolls up to 100 inches wide • 2-4 Plys (angles 0° and between 45° and 90°) • Ply aerial weight range depends on roving/tow size • Stitch pattern variability
NC2-ADVANCED NON-CRIMP FABRIC: Patented multi-axial material with potential advantages and capabilities: use large tow fibers, lower aerial weight plys (even with large tow fibers), and binder application to individual plys.
• Rolls up to 100 inches wide • 2-4 Plys (angles 0° and between 45° and 90°) • Ply aerial weights down to 100 gsm • Stitch pattern variability
Preforming Materials DFP – DRY FIBER PLACEMENT: Hexcel’s unique technology for creating complex, net-shaped preforms for demanding liquid molding applications. The manufacturing process is automated and produces very exact and repeatable results.
• Allows optimized weight/performance design • Virtually no limitation on fiber orientations • Robust handling characteristics • Ply drops can be incorporated • Yarn to preform process minimizes
qualification steps • Software provides definitive quality control
SPECIALTY AND HYBRID REINFORCEMENT MATERIALS
63
DRY UNI-DIRECTIONAL MATERIAL: Dry UD products are suitable for many applications including preform construction. Various processes are used to hold the fibers in place depending on the applications and requirements.
SPECIALTY PREFORMING MATERIALS: Hexcel has expertise and other capabilities for constructing and optimizing preforms:
• Functionalized binders • Pinning • Stitching
In addition to the products above, Hexcel offers de-sized carbon fabrics (FDS) and Lightning Strike carbon fabrics (XLS). Carbon fibers are typically produced with a sizing (binder) on them which aids in processing the fibers later with less broken filaments. In some markets and for some resin systems, it is preferred not to have this chemistry on the carbon fiber surface. Hexcel has a proprietary de-sizing process to remove this chemical from the carbon fiber surface.
Hexcel also has available carbon fabrics with interwoven wires for Lightning Strike applications where both structural integrity and lightning protection are required in a single ply. Standard plain weave designs are available (IWWF) where the wire is woven inside the weave next to an adjacent carbon tow, as well as the more elaborate pattern designs like our patent pending “double weave,” where the woven wire is 92 percent on the surface of the carbon weave.
64
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71
SPECIFICATIONS
AMS 3824 This specification covers the basic forms of finished glass fabrics used by themselves or as components of other materials.
AMS 3902 This specification covers cloth woven from high-modulus, continuous, multifilament aramid yarn.
AMS-C-9084 This specification replaces MIL-C-9084 and covers the requirement for glass fabrics that have been woven, cleaned and finished for further fabrication into glass fabric base resin laminates and sandwich materials.
ASTM-D-579 Standard specifications for Greige Woven Glass Fabrics. This specification includes the basic forms of greige woven glass fabrics and their testing.
ASTM-D-1668 This specification covers open mesh woven glass fabrics used for membrane waterproofing and built up roofing (Type II).
ASTM-D-4029 Standard specifications for finished woven glass fabrics. This specification includes finished fabrics woven from
glass fiber yarns intended as a reinforced material in laminated plastics for structural use.
72
MIL-C-20079 This specification covers glass and tape used as lagging material over thermal insulation and as a facing material for hull insulation board.
MIL-C-22787 Vinyl coated Glass fabrics. The base cloth is glass fabric.
MIL-I-24244 This specification covers thermal insulation with special corrosion and chloride requirements.
MIL-P-25515 Phenolic Laminates. Glass fabrics used as supports for phenolic resin laminates.
MIL-Y-1140 This specification covers the basic forms of untreated glass yarns and fabrics used by themselves or as components of other materials. The materials are generally used as electrical insulation, mechanical support or as structural members.
MIL-R-7575 Resin, Polyester, Low Pressure Laminates, Fiber Glass Base. Glass fabrics used as supports for polyester resin laminates.
MIL-R-9300 Resin, Epoxy, Low Pressure Laminates, Fiber Glass Base. Glass fabrics used as supports for polyester resin laminates.
SPECIFICATIONS
73
SPECIFICATIONS
MIL-C-44050A This specification covers cloth woven from high-modules, continuous, multifilament yarn.
U.S.C.G. Subpart 164-009Non-combustible material for merchant vessels. Woven glass cloth containing not more than 2.5 percent lubricant is automatically considered non-combustible.
BMS 9-3 This specification covers the Boeing Commercial Airplane Company’s requirements for woven, cleaned, and finished E-Glass fiber glass fabrics. End fabric uses are high performance structural prepreg for aircraft structure and wet lamination of tooling and structural composite repair.
BMS 9-8 This specification establishes requirement for woven and non-woven carbon reinforcements in a Boeing application.
BMS 9-17 This specification establishes requirements for intermediate modulus carbon fibers and fabric in a Boeing application.
74
SELECTED CONVERSIONS AND FORMULAS
Areal Weight
oz/yd2 x 33.9057 = g/m2
g/m2 x 0.0295 = oz/yd2
Mass
oz: ounce, lb: pound
1 oz = 28.35 g • 1 g = 0.035 oz
1 lb = 0.454 kg • 1 kg = 2.205 lb
Force
N: Newton, daN: decaNewton
1 N = 0.102 kgf ≈ 0.1 kgf • 1 daN = kgf ≈ 1kgf
1 kgf = 9.81 N ≈ 10 N or 1 daN
1 lbf = 4.4482 N = 0.4536 kgf
Strength
Pa: Pascal, MPa: megaPascal
1 MPa = 1 N/mm2
1 MPa = 10bars = 0.1 hbar ≈ 10 kgf/cm2 or 0.1 kgf/mm2
1 bar = 0.1 MPa =105 Pa ≈ 1daN/cm ≈ 1 kgf/cm2
1 hbar = 10 MPa = 107 Pa ≈ 1kgf/mm2
100 psi (lbf/in2) = 0.69 MPa • 1 MPa = 145 psi
1 psi (lbf/in2) = 6894.76 Pa ≈ 0.0703kgf/cm2
Length
yd: yard, ft: foot, in: inch
UK mile: 1 mile = 1.609 km • 1 km = 0.62 mile
Nautical Mile: 1 mile = 1.852 km
1 yd = 0.91 m • 1 m =1.09 yd
1 ft (1/3 yd) = 0.3048 m • 1 m = 3.281 ft
1 in (1/12 ft) = 2.54 cm • 1 cm = 0.39 in
75
Surface
1 sq in = 6.45 cm2 · 1 cm2 = 0.15 sq in
1 sq yd = 0.83 m2 · 1m2 = 1.19 sq yd
1 sq ft = 0.093 m2 · 1 m2 = 10.76 sq ft
1 sq mile = 2.59 km2 · 1 km2 = 0.30 sq mile
1 acre = 0.40 ha · 1 ha = 2.47 acre
Volume
1 cu in = 16.39 cm3 · 1 cm3 = 0.06 cu in
1 cu yd = 0.76 m3 · 1 m3 = 1.31 cu yd
1 cu ft = 28.31 dm3 · 1 dm3 = 0.035 cu ft
Density
1 lb/in3 = 27.68 g/cm3 · 1 g/cm3 = 0.036 lb/in3
1 lb/ft3 = 0.016 g/cm3 · 1 g/cm3 = 62 lb/ft3
Capacity
(US) Gallon: 1 gal = 3.781 · 1 l = 0.26 gal
(UK) Gallon: 1 gal = 4.541 · 1 l = 0.21 gal
Consumption
(US) 0 miles/gal = 23.50/100 km · 10 l/100 km = 23.8 miles/gal
(UK) 10 miles/gal = 28.21/100 km · 10 l/100 km = 29.5 miles/gal
Velocity
1 km/h = 0.2778 m/s · 1mph = 1.609 km/h = 0.4470 m/s
Yarn Conversions
Tex = 496,055/(yd/lb)
Dtex = Tex X 10 = Denier/.9
Denier = dtex X .9 = 9 tex
Denier = g/9000m
Tex = dtex/10 = g/1000m
CONVERSIONS
76
Energy and Power
J: Joule, cal: calorie, th: thermal unit, W: watt
Density
1 W = 1 J/s
1 Wh = 3 600 J = 0.860 kcal · 1 kcal = 4 185.5 J = 1,1626 Wh
1 kJ = 0.2389 kcal · 1 cal = 4.185 J = 0.2389 cal
1 th = 1,000 kcan
tep: ton (metric) equivalent fuel oil
tec: tonne (metric) equivalent coal
1 tep = 10,000 th = 11,626 kWh = 11.6 MWh = 1.5 tec 1 100
Nm3 natural gas
Specific Heat
kj/kgK: kilojoule per kilogram Kelvin
Thermal Conductivity
1 W/mK or W/mºC = 0.860 kcal/mhºC
Coefficient of Thermal Loss:
1 W/m3K or W/n3C = 0.8m60 kcal/m3hºC
Temperature
K: Kelvin, ˚C: degree Celsius, ˚F: degree Fahrenheit
TK = ˚C + 273.18˚
˚F = 9/5˚C + 32
CONVERSIONS
US Operations1913 North King StreetSeguin, Texas 78155
Telephone (830) 379-1580
Fax (830) 379-9544
Technical Service(830) 401-8180
Customer Service Toll Free (866) 601-5430
For European sale offi ce numbers and full address list, please go to:
http://www.hexcel.com/contact/salesoffi ces
www.hexcel.com
March 2009