What Material Is The Rubber Pad Made Of?

Rubber pad English name Rubber

There are various types of rubber pads, most of which are made of rubber. Usually we see transparent rubber pads, EVA rubber pads, EVA pads, round pads, semi-circular transparent pads, rubber pads, silicone pads, rubber pads , PU, PVC, EPDM transparent pads, hemispherical foot pads, hemispherical rubber pads, glass pads, crash pads, non-slip pads, shock-proof pads, anti-corrosion pads, waterproof pads, sponge pads, foam pads, etc.

Classification of rubber materialsNatural rubber NR (Natural Rubber) is made of rubber tree latex. It is a polymer of isoprene. It has good wear resistance, high elasticity, tear strength and elongation. It is easy to age in the air. , It becomes sticky when exposed to heat. It is easy to swell and dissolve in mineral oil or gasoline. It is resistant to alkali but not resistant to strong acids. Advantages: good elasticity, acid and alkali resistance.

Disadvantages: Not weather-resistant and oil-resistant (vegetable oil resistant). It is the raw material for making tapes, hoses, and rubber shoes. It is also suitable for making shock-absorbing parts and products used in car brake fluids, ethanol and other liquids with hydroxide.

SBR (Styrene Butadiene Copolymer) is a copolymer of butadiene and styrene. Compared with natural rubber, it has uniform quality, less foreign matter, better abrasion resistance and aging resistance, but its mechanical strength is weaker. Used in combination with natural rubber.

Advantages: low-cost, non-oil-resistant materials, good water resistance, good elasticity with hardness below 70, and poor compressibility at high hardness. Disadvantages: strong acids, ozone, oils, oil esters and fats and most are not recommended Parts of hydrocarbons. It is widely used in tire industry, shoe industry, cloth industry and conveyor belt industry, etc.

Butyl Rubber IIR (Butyl Rubber) is a polymerization of isobutylene and a small amount of isoprene. Because the movement of the steric barrier molecules of the methyl group is less than that of other polymers, the gas permeability is less. Resistance to hot sunlight and ozone Large, good electrical insulation;

It has high resistance to polar solvents, and the general use temperature range is -54-110℃. Advantages: It is impermeable to most general gases, has good resistance to sunlight and odors, and can be exposed to animal or vegetable oils or Chemicals that can be gasified.

Disadvantages: not recommended

Together with petroleum solvents, kerosene and aromatic hydrogen, hydrogenated nitrile nitrile rubber is used for inner tubes, leather bags, rubber paste paper, window frame rubber, steam hoses, heat-resistant conveyor belts, etc. of automobile tires. HNBRHydrogenate Nitrile) Hydrogenated nitrile rubber is hydrogenated to remove part of the double-stranded nitrile rubber. After hydrogenation, its temperature resistance and weather resistance are much higher than that of ordinary nitrile rubber, and its oil resistance is similar to that of ordinary nitrile rubber.

The general use temperature range is -25-150℃. Advantages: better abrasion resistance than nitrile rubber, excellent corrosion resistance, tensile strength, tear resistance and compression characteristics, good resistance under atmospheric conditions such as ozone, generally suitable for laundry or dishwashing Disadvantages of cleaning agents: it is not recommended to be used in alcohol, ester or aromatic solutions in the air conditioning and refrigeration industry. It is widely used as a seal in the environmentally friendly refrigerant R134a system.

Ethylene propylene rubber (EPDM), the seal of automobile engine system, is made by copolymerization of ethylene and propylene. Therefore, it has excellent heat resistance, aging resistance, ozone resistance, and stability, but it cannot be sulfurized to solve this problem. The problem is that a small amount of double-stranded third component is introduced into the EP main chain and can be sulfurized to form EPDM. The general use temperature is -50-150 ℃. It has excellent resistance to polar solvents such as alcohols and ketones. Advantages: It has good weather resistance and ozone resistance, excellent water resistance and chemical resistance, alcohols and ketones can be used, high temperature steam resistance, and good gas impermeability.

Disadvantages: Not recommended for food use or exposure to aromatic hydrogen. Seals or parts for sanitary equipment in high temperature water vapor environment. Rubber parts in the brake (brake) system. Sealing in the radiator (car radiator).

NBR (Nitrile Rubber) is made by copolymerization of acrylonitrile and butadiene. The acrylonitrile content is 18%-50%. The higher the acrylonitrile content, the better the resistance to petrochemical hydrocarbon fuel oil. However, the low temperature performance becomes worse. The general use temperature range is -25-100°C. Nitrile rubber is currently one of the most commonly used rubbers for oil seals and O-rings. Advantages: good oil resistance, water resistance, solvent resistance and high pressure resistance The characteristics of oil have good compressibility, abrasion resistance and elongation.

Disadvantages: Not suitable for use in polar solvents, such as ketones, ozone, nitro hydrocarbons, MEK and chloroform? Used to make fuel tanks, lubricating oil tanks, and in petroleum hydraulic oil, gasoline, water, silicone oil, diester series The rubber parts used in fluid media such as lubricating oil, especially the sealing parts, can be said to be the most widely used and lowest cost rubber seals. Neoprene CR (Neoprene, Polychloroprene) is vulcanized by the polymerization of chloroprene monomers. Rubber has good elasticity and abrasion resistance, not afraid of direct sunlight, particularly good weather resistance, not afraid of intense distortion, not afraid of refrigerants, resistant to dilute acid and silicone ester lubricants, but not resistant to phosphate ester hydraulic oil at low temperatures It is easy to crystallize, harden, and storage stability is poor. It has a large expansion in mineral oil with low aniline point. The general use temperature range is -50-150 ℃. Advantages: Good elasticity and good compression deformation. The formula does not contain sulfur, so it is very easy to come. The production is resistant to animal and vegetable oils, and will not affect the physical properties due to neutral chemicals, fats, greases, various oils, and solvents, and has flame-resistant properties. Disadvantages: strong acids, nitro hydrocarbons, esters, and chloroform are not recommended R12 refrigerant-resistant seals among ketone chemicals, rubber parts or seals on household appliances.

It is suitable for making all kinds of parts that directly contact the atmosphere, sunlight and ozone. Suitable for all kinds of flame-resistant and chemical-resistant rubber products.

The composition of synthetic rubber Synthetic rubber is a polymer made of petroleum and natural gas as raw materials, and diolefins and olefins as monomers. The polymer of rubber has broken through the process of monomer polymerization. At present, the world's leading rubber factories have begun to use stronger rubber, which is made of ultra-polymer aggregates, and the cost is quite low.