Q:Excuse me, is PU one kind of silicone? Or what is the connection between the two?

Silica gel (Silica gel; Silica) alias: silicone rubber is a highly active adsorption material, belongs to amorphous material, its chemical formula is mSiO2. NH2O. Insoluble in water and any solvent, non-toxic, tasteless, chemical stability, in addition to strong alkali and hydrofluoric acid, do not react with any substance. Different types of silica gel have different microporous structures because of their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics which are difficult to be replaced by other similar materials: high adsorption properties, good thermal stability, stable chemical properties, high mechanical strength, etc.. According to the size of the pore size, silica gel is divided into large pore silica gel, coarse pore silica gel, B type silica gel and pore silica gel.

Q:Is sandal rubber bottom good or polyurethane good?

Because rubber is a high molecular compound. Therefore, the sole has high elasticity, high wear resistance, can undergo repeated bending, stretching, compression without damage. It also has acid and alkali resistance, so it is suitable for wearing in rainy days. Like our boots is rubber shoes. The advantage of natural rubber is that it is very soft, elastic, excellent and suitable for all kinds of sports, but the disadvantages are also obvious, that is, it is very hard to wear. Indoor sports shoes, multi-purpose natural rubber. Synthetic rubber is also divided into wear-resistant rubber, environmental protection rubber, air rubber, viscous rubber, hard rubber, carbon rubber.

Q:What is the temperature of ordinary silicone rubber resistant to low temperature?

Because the molecular structure of silicone rubber is amorphous, the temperature has little influence on its properties, and it has good cold resistance. The brittleness temperature of the general organic rubber is from -20 DEG C to -30 DEG C, while the brittleness temperature of the general silicone rubber is between -60 and -70 degrees centigrade. When the rubber is introduced in 7.5 (mol)% phenyl, brittle temperature of silicone rubber can be reduced to -115 DEG C, remain elastic at -90 DEG C and can use.

Q:What kind of rubber products are expensive?

Other technologies, processes, and logistics all determine the cost

Q:How does rubber mobile phone cover change yellow?

In physical properties, rubber has swelling, rheological properties and other changes. Tensile strength, elongation at break, impact strength, flexural strength, compression ratio and elasticity decrease.

Q:What is the role of softening plasticizers in rubber? How are they classified?

Rubber plasticizer refers to add certain substances in rubber, can make the force rubber molecules is reduced, thereby reducing the glass transition temperature of the rubber, the rubber plasticity and fluidity, easy calendering and extrusion molding operation, but also can improve the mechanical properties of the vulcanizate of some physical machines, such as the decrease of hardness and elastic constant tensile stress, with high and low heat, improve the cold tolerance.

Q:The silica gel of the kettle is the white one that is waterproof and leaked out

Butadiene styrene rubber (SBR) copolymer of butadiene and styrene. Performance is close to natural rubber, is the largest yield of general-purpose synthetic rubber, characterized by wear resistance, aging resistance and heat resistance, more than natural rubber, texture is more natural rubber uniform. Disadvantages are: low elasticity, anti bending, anti tear performance is poor; the processing performance is poor, especially the poor, low strength self adhesive rubber. Temperature range: about 50 DEG C + 100. Mainly used instead of natural rubber to make tires, rubber sheets, hose, rubber shoes and other general products.

Q:What is the difference between PVC rubber and ordinary rubber?

The vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resins. The material is a non crystalline material. PVC materials often use stabilizers, lubricants, auxiliary processing agents, pigments, anti shock agents and other additives in practical use. Is not flammable, high strength, excellent resistance to climate variability and geometric stability.

Q:The difference between plastic rubbers and rubber boots.

There are the following differences:1, material is different, the former is plastic, and the latter is rubber;2, comfort is different, the former is relatively hard, uncomfortable wearing, and the latter is relatively soft.3, rubber shoes need good maintenance, and the former is not necessary.

Q:What are the ingredients in the tires?

Tires are usually composed of 3 parts of tyre, tyre, cushion belt. The inner layer of the fetus body has the rubber layer with good air tightness, and a special wheel rim is required. The structure of tire in the world has been developed in the direction of tubeless, radial structure, flat (smaller ratio of height to width of tire section) and light weight.