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The Halogen Free Flame Retarding Thermoplastic Polyurethane Elastomer of
Research and Application
Zhu FengHu Yan
Hangzhou JLS Flame Retardants Chemical Co., Ltd.-China
IntroductionHangZhou JLS Flame Retardants Chemical Co.,Ltd.is a special corporation for exploring and manufacturing non-halogenated flame retardants. We have explored a series of products to meet halogen free requirement.JLS is one of leaders in range of ammonium polyphosphate, non-halogenated flame retardants for polyolefine and melamine derivates in the world.
Our tenet : QUALITY, INNOVATION, SERVICE
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Content
IntroductionFR mechanism of IFRCharacteristics of non-halogenated
flame retardancy TPU compoundApplications
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1. Introduction
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Properties of TPU elastomer
Advantages:– A good tensile strength– A high flexile– Large range of hardness– A high abrasion resistance – High ozone resistance
Disadvantage:– Easily flaming
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Applications of TPU elastomer
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……
Films
Shoes
Pipes
Auto industry
Modification
Wires and cabels
Phosphate ester ATH/MTH
MC
TPU
Low flame retardancy
Bad heat stabilityMigration to the surface
Large dosage in TPU causes low flexile
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Drawback of TPU elastomer and FR-TPU
Flaming
Dropping
Heavy smoke
2. FR mechanism of IFR
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Mechanism of Intumescent Flame Retardants
Acid fountain
Dehydration
Carbon fountain
Carbon
Gas fountain
Catalyze to carbon
Noncombustible gas
Intumescent carbon layer
Flame resistance
Polymer
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3. Characteristics of non-halogen flame retardancy TPU compound
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Flame behavior of IFR-TPU composite
Other properties of IFR-TPU composite
Comparison of JLS-PNP1 with other FR in the properties of the composite
Item sample
1 2 3 4 5 6
PNP1，wt% 20 20 --- --- --- ---Mg(OH)2，wt% --- --- 50 --- --- ---
Phosphorus ester，wt% --- --- --- 4 --- 4MC**，wt% --- --- --- 25 32.8 25
Anti dropping agent，wt% --- 0.2 --- --- --- ---Shore A Hardness 88 88 95 88 90 88
LOI 36 38 30 28 25 28UL-94（0.8mm） V-0 V-0 V-1 V-1 Failed V-1
Dropping No No No Yes Yes YesTensile strength，MPa 29.6 28.7 4.9 19.7 8.0 14.6
Elongation at break，% 490 478 130 450 170 350Vertical flame test VW-1 Passed Passed Failed Failed Failed Failed
0
10
20
30
40
LOI(%
)Dropping
&Migration
Low flame retardancy
Long extinguish time
&Deteriorate of mechanical properties
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Based on TPU (shore A 90)
According to UL1581Vertical Flame Test (VW-1)
Criterion:
1. 燃烧标记(牛皮纸)不能被炭化超过２５%；２.５次１５秒的燃烧续燃时间不能超过６０秒；３.燃烧滴落物不能引燃棉花
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First ignition Second ignition Third ignition
Original from: purchased from the market Result: Failed
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VW-1 test
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Original from: JLS Result: PASSFirst ignition Second ignition Fourth ignitionThird ignition Fifth ignition
VW-1 test
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Purchased from the market
JLS26cm
0 5 10 15 20 25
20
24
28
32
36
40
LOI(％
)
JLS-PNP1(wt.％)
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Efficiency of JLS-PNP1 in TPU (shore A 90) compound
Mechanical properties of FR-TPU composite
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0 5 10 15 20 25
480
520
560
600
640
680
JLS-PNP1(wt.％)
Elogation(％
)
20
25
30
35
40
Tensile Strength(MPa)
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Based on TPU (shore A 90)
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The rheology of TPU (shore A90) /JLS-PNP1(18wt%) compound
Recycle of (shore A90) /JLS-PNP1(18wt%) compound
0
10
20
30
40
50
60
1 2 3 4
Recycle timesTensile strength(Mpa) Elogation *10(%) LOI(%)
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Test Conditions
Thickness：1mm
Draw speed：200mm/min
Determination of Tensile Properties
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26
32
7
17
0
5
10
15
20
25
30
35
LOI(%) Tensile strength(Mpa)
Original from: purchased from market Original from: JLS
Item ProductUnit 001R 001W 002R 002W 003R 003W Test method
Density g/cm3 1.29 1.28 1.29 1.28 1.20 1.13 ISO1183
LOI % 32 32 32 32 30 30 ISO4589
Hardness Shore A 87±2 87±2 83±2 83±2 81±2 81±2 ISO 2039-2
Tensile strength M pa 20 16 14 13 6.9 7 IEC60811
Elongation % 590 590 600 550 510 610 IEC60811
Heat aging ×h 110 ×168h IEC60811
Variation of tensile strength % 11 13 15 16 8 7 IEC60811
Variation of elongation % 13 18 17 19 16 12 IEC60811
Flame retardancy VW-1 FT1 UL1581
Summary High efficiency of flame retardancy– NO DROPPING– Extinguished easily High mechanical propertiesHigh flexileWell extrusionWell recycledEnvironmentally friendly
4. Applications
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Shipboard cable
Building wire
Automobile wires
Communi-cation wire& cable
Fiber optical
Electronic wires
JLS-FR001R ◆ ◆ ◆ ◆ ◆ ◆
JLS-FR001W ◆
JLS-FR002R ◆ ◆ ◆ ◆
JLS-FR002W ◆
JLS-FR003R ◆
JLS-FR003W ◆
Applications
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R: brightnessW: Semi- brightness
High mechanical properties
Non-halogenated flame retardancy
Example JLS-FR001R
Power cord
Zone 1/ Zone 2 / Zone 3 / Zone 4 / Zone 5 / Die /
130 160 170 160 160 155
Extrusion characteristics of JLS-FR001R
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Characteristic of power cord : Densityg/cm3
1.26
Tensile strength Mpa
29
Elogation at break %
620
Aging 110℃×168H
Tensile strength Mpa
27 (7.90%)
Elogation at break
%
570 (8.07%)
Flame retardancy
VW-1 according to UL1581
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JLS-FR001W for Telephone wires
JLS-FR002W for electronic wires
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JLS-FR002R as a jacket and JLS-FR003W as insulation for SVE 90C 18AWG
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Thanks for your attention!
[email protected]@jlschemical.com
www.jlschemical.com
