How non-woven products are antistatic

We often see anti-static non-woven fabrics on the Internet. Can non-woven fabrics really be anti-static? How did it do it?


As we all know, static electricity is an objective natural phenomenon, generated in many ways, such as contact, friction, peeling, etc. It can cause electronic equipment or office automation equipment integrated circuits (IC) to malfunction, damage the storage, especially to electromagnetic waves (EMI) and electrostatic induction (ESD) interference. This not only damages semiconductor devices, but can also cause accidents. Therefore, composite materials such as antistatic conductive non-woven fabrics, films, and sheets are used to shield electromagnetic waves, prevent electrostatic effects, and reduce electrostatic disasters.


Non-woven textiles are naturally charged when they are rubbed. How to make the electrostatic charge leak out quickly and avoid the harm of static electricity?


The ability of non-woven textiles to leak static charges is related to the specific resistance of non-woven textiles. In order to prevent the electrostatic voltage from drying to an unpleasant level, the specific resistance of non-woven textiles should be less than 1010Ω·cm. Usually, non-woven fabrics that reach this specific resistance level under standard conditions (relative humidity 65%, 20°C) are called antistatic non-woven fabrics.


Generally, the specific resistance of non-woven fabrics is more than 1013Ω·cm, and the non-woven fabrics can reach the level of antistatic through the method of moisture absorption modification and finishing with antistatic finishing agent. For example, the antistatic properties of non-woven fabrics can be improved by blending or copolymerizing hydrophilic polyethylene glycol, sodium alkyl sulfonate, etc. with polymers.


Antistatic finishing agent, mainly refers to metal powder and inorganic substances such as carbon, polysiloxane compounds, surfactants, etc. At present, the most used external antistatic finishing agent. It is used for surface spraying in the production and processing of non-woven textiles; as an additive and antistatic finishing agent in the processing of synthetic non-woven textiles, there are anionic, cationic, non-ionic and amphoteric surfactants. Among them, anionic antistatic agents have good thermal stability and are mostly used in the production and processing of non-woven textiles. It mainly includes higher alkyd esters (salts), aliphatic sulfonates, and higher acid phosphates (salts). In addition to metal ions such as sodium and potassium, the cation part of the counterion also uses alkyl alcohol amines such as triethanolamine.


The antistatic finishing agent developed by modern chemical industry has been widely used in non-woven textiles and plastic products. It plays a very good role in restraining the generation, accumulation and dissipation of static electricity. Antistatic finishing agent is a general term for substances used to suppress the amount of static electricity generated on the surface of materials with good electrical insulation properties such as synthetic resin, or to eliminate the amount of accumulated static electricity. They play a lot of roles in the production, processing and use of non-woven textiles and synthetic resin films, especially preventing the occurrence and accumulation of static electricity, and overcoming the electric charges generated by the friction of non-woven textiles. They are more meaningful in the current electronic information technology. Big.