There are several ways of obvious damage to the surface of plastic products, among which there are scratches of sharp objects; Abrasive friction caused by wear; Surface damage that changes surface properties or luster; Or a "write effect" caused by a slight scratch of a passivating object. These phenomena are likely to occur when the material succumbs to compressive and sliding or lateral (lateral) forces, resulting in ductile/brittle failure resulting in scratches. In scratching, uneven surfaces produce uneven light scattering and "scratching". The solution to improve the scratch performance is to minimize the roughness of the bottom surface of the polymer and reduce the shoulder of the scratch, so that it produces as little light scattering as possible and as little scratch visibility as possible, so as to achieve higher wear resistance.

Some plastics themselves already have good wear resistance, after adding a variety of wear resistant additives, can be more improved wear resistance. Plastic composites of lubricating additives like polytetrafluoroethylene, molybdenum disulfide, graphite, silicon lubricating oil, glass fiber, carbon fiber and aromatic polyamide fiber additives have self lubricating properties and can reduce the pressure of matched parts, thereby improving the wear resistance of the material.

Here is a look at the materials that can improve the wear resistance of the material.

1, polytetrafluoroethylene (PTFE, Teflon)

PTFE is all resistant agents have the lowest friction coefficient. The PTFE molecules that are ground out during the friction process will form a lubricating film on the surface of the part. PTFE has good lubricity and wear resistance under friction shear force, and PTFE is the best wear resistant additive in high load. These high-load applications include hydraulic piston ring seals and thrust washers. The most appropriate PTFE content is 15%PTFE for non-crystalline plastics and 20%PTFE for crystalline plastics.

2, molybdenum disulfide

Molybdenum disulfide another common name is "Moly", mainly used in nylon plastic a wear-resistant additive. Molybdenum disulfide acts as a crystallizing agent to increase the crystallinity of nylon, so that nylon material produces a harder and more friction-resistant surface. Molybdenum disulfide has a high affinity for metals. Once attached to a metal surface, molybdenum disulfide molecules fill microscopic pores and make the surface more slippery. This makes molybdenum disulfide an ideal wear-resistant additive for applications where nylon and metal rub against each other.

3, graphite

The chemical structure of graphite is a unique lattice structure. This unique chemical structure allows the graphite molecules to slide easily against each other with very little friction. This abrasion resistance is especially important in environments where water is present. This property makes graphite an ideal wear resistance additive for many applications placed in water, such as water housings, impeller and Value seals.

4. Polysiloxane

Polysiloxane liquid is a kind of wear-resistant additive that will travel. When added to thermoplastics, the additive slowly migrates to the surface of the part and forms a continuous film. Polysiloxanes have a wide range of viscosities, measured in centistokes. The viscosity of polysiloxanes is over low, over liquid and quickly migrates to the surface of the part to provide wear resistance. If the viscosity of polysiloxane is too low, it is more volatile and will quickly migrate away from the part.

5, glass fiber

Glass fiber is a hard and high scratch fiber, so it is often mistakenly thought that the glass fiber added to the plastic will destroy the wear resistance of the plastic. Glass fiber provides the function of strong mechanical combination between polymers, so glass fiber can increase the overall property of thermoplastic structure and improve the wear resistance. Glass fiber provides reinforcement that can increase the plastic's resistance to creep, thermal conductivity and thermal deformation, thus significantly improving the plastic's ability to withstand load and friction speed.

6, carbon fiber

and glass fiber, carbon fiber can greatly improve the integrity of the structure, wear resistance and resistance to load and friction speed ability. Different from glass fiber, carbon fiber is a softer and less scratchable fiber. Carbon fiber will not scratch the abrasive surface of the iron or steel it is rubbing against. The addition of more than 10% carbon fiber to thermoplastics will have the function of eliminating static electricity, and can overcome the static electricity problems caused by it.

7, aromatic polyamide fiber

Aromatic polyamide fiber is also one of the wear-resistant additives. Unlike glass fiber and carbon fiber, it is the softest and most scratch-free fiber. This property is the main advantage of aromatic polyamide fibers in wear resistant applications, especially in matching the surface of the part to the scratch-resistant fibers.

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