ANTI –STATIC AGENT

ANTISOL-SF

Unique Concentrate Antistatic lubricant especially for Fiber dyed PET and other Synthetics and Blends.FUNCTIONS AND BENEFITS Concentrated Anti-static agent and lubricant

Excellent Electrostatic protection by reducing the static charge of synthetic substrates Non yellowing Excellent Hydrophilicity Gives lubricity and soft Handle Readily Miscible in cold water ANTISOL-SF treated material requires no conditioning Imparts excellent fiber to fiber cohesiveness with reduction in fiber to metal friction HTHP Fiber dyeing m/c by Exhaust method and Spray method prior to spinning

ApplicationFeaturesHTHP Fiber dyeing m/c by Exhaust method and Spray method prior to spinning .

By Exhaustion: By Spray Dosage: 0.1 – 0.5 % owm Dosage: 0.06 – 0.3 % owm pH: 5 - 5.5 pH: 5 - 5.5 Temperature: 40°C – 60 ° C Temperature: 40°C Time: 15 – 30 mins Normally 0.06% to 0.1% solution of ANTISOL-SF is sprayed on Cotton/Silk fibre before mechanical

processing. 0.1–0.3 % on weight of PET fiber is sufficient to give excellent mechanical properties.

0.06-0.2 % on wt of Wool/Silk ensures trouble free process

Product Profile Appearance: Pale yellow to Yellow liquid pH (5% aq): 6-8 Ionic: Non-Ionic Shelf life: 6 months Chemical composition: Synergistic blend of organic fatty acid ester, surfactants and

antistatic. Compatibility: Compatible with Non-ionic, Cationic and Anionic Surfactants.

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SHAKE WELL BEFORE USE FOR BETTER APPLICATION

Regular clean up of the machine Check the water quality Check housekeeping and cleanliness of the machine Use dedicated container for removing chemicals from carboys. Check for any pH drift during the softening cycle Ensure that iron concentration does not exceed 2 ppm in the bath water Do not expose product to prolonged periods at temp. Above 50oC

WHY ANTI-STATIC AGENTS SHOULD BE USED:----------------------------------------------------------------------An antistatic agent is a compound used for treatment of materials or their surfaces in order to reduce or eliminate buildup of static electricity. Static charge may be generated by the tribo-electric effect [1] Or by a non-contact process using a high voltage power source. Static charge may be introduced on a surface as part of an in-mold label printing process.

[2]The role of an antistatic agent is to make the surface or the material itself slightly conductive, either by being conductive itself, or by absorbing moisture from the air; therefore, some humectants can be used. The molecules of an antistatic agent often have both hydrophilic and hydrophobic areas, similar to those of a surfactant; the hydrophobic side interacts with the surface of the material, while the hydrophilic side interacts with the air moisture and binds the water molecules.

Internal antistatic agents are designed to be mixed directly into the material; external antistatic agents are applied to the surface.

Mechanism of Antistatic Finishes The principle mechanisms of antistatic finishes are increasing the conductivity of fiber surface

(equivalent to lowering the surface resistivity) and reducing frictional forces through lubrication. The surface resistivity is defined as a ‘material property of a substance whose numerical value is equal to the ratio of the voltage gradient to the current density. The resistivity is in effect the resistance of the fiber to electrical flow. Increasing conductivity produces a lower charge buildup and a more rapid dissipation while increased lubricity decreases the initial charge buildup.

Antistatic agents that increase fiber surface conductivity form an intermediate layer on the surface. This layer is typically hygroscopic. The increased moisture content leads to higher conductivity. The presence of mobile ions on the surface is very important for increased conductivity. The effectiveness of hygroscopic antistatic finishes depends greatly on the humidity of the surrounding

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air during actual use; lower humidity leads to lower conductivity (higher resistance) and greater problems with static electricity.

Most non-polymeric antistatic finishes are also surfactants that can orient themselves in specific ways at fiber surfaces. The hydrophobic structure parts of the molecule acts as lubricants to reduce charge buildup. This is particularly true with cationic antistatic surfactants that align with the hydrophobic group away from the fiber surface, similar to cationic softeners. The main antistatic effect from anionic and non ionic surfactants is increased conductivity from mobile ions and the hydration layer that surrounds the hydrophilic portion of the molecule since the surface orientation for these materials places the hydrated layer at the air interface.

Antistatic FinishAntistatic finishes are used for the removal in synthetic fibers of the unwanted effects of electrostatic charge produced during production and wear of fabrics and knits. Electrostatic charge causes an undesirable adhesive power and a resultant shabbiness. It is applied by means of an anti-static chemical treatment, the effect of which may be temporary or permanent.

There are two types of Antistatic finish Non-durable finishes Durable finishes

Explain durable and non durable finish for antistatic effects.

Non-durable finishes Non- durable antistatic agents are preferred for fiber and yarn processing finishes since ease of removal is important. Other important requirements of spin finish and fiber lubricants are heat resistance and oil solubility. This group of mostly hygroscopic materials includes surfactants, organic salts, glycols, polyethylene glycols, and polyelectrolyte, quaternary ammonium salts with fatty alkyl chains, polyethylene oxide compounds and esters of salts of alkyl phosphonium acids. The general requirements for non durable antistatic agents are:

Low volatility Low flammability Non yellowing (heat stable) Non corrosive Low foaming

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1. Esters of phosphoric acid form the largest group of non-durable antistatic agents

The alkyl groups are usually derived from fatty acids. Ethoxylated fatty alcohols are also used to form the esters. The durability of these phosphoric acid esters increases with molecular size. 2. Quaternary ammonium compounds are the next largest group of non durable anti static agent/ The most widely used are ditallowdimethylammonium chloride and dehydrogenated tallowdimethylammonium chlorideThese are common ingredients in laundry and dryer applied consumer softeners. Like many other cationic anti-static agents have an affinity for textile fibers and can be applied by exhaustion processes. 3. The last group of non-durable antistatic agent is composed of non-ionic compounds such as ethoxylated fatty esters, alcohol and alkyl amines. Mixtures of cationic and non-ionic surfactants demonstrate synergistic antistatic properties. Non ionic materials provide increased moisture absorption and the cationic products provide the mobile counter ions.

Durable Antistatic agents Obtaining antistatic properties that are durable to repeated launderings from a single finish

application is difficult to achieve. The basic principle is to form a cross linked polymer network containing hydrophilic groups.

Typically, polyamines are reacted with poly-glycols to make such structures. These polymers can be formed prior to application to fabrics, or they can be formed in situ on the fiber surface after pad application.

A variety of cross linking approaches can be used. One based on polyepoxides is shown below The amount of hydrophilic character in the final polymer can be varied to meet individual

requirements. The larger the hydrophilic portions, the more moisture are absorbed and the greater the antistatic effects obtained.

However, at high levels of absorbed moisture, the polymer surface film softens and is more easily removed by abrasion during laundering. Higher degrees of cross linking will reduce the moisture absorption and subsequent swelling, but the antistatic effectiveness decreases.

Additional difficulties with cross linked hydrophilic polymers include interferences with soil release and soil re-deposition properties.

Owing to the difficulties in achieving the perfect balance of desired properties, the use of durable antistatic finishes is limited.

Other wash-fast antistatic agents are described in the literature, including polyhydroxypolyamines (PHPA) or polyalkylene and polyacrylic copolymers. (FINAL PAGE)

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