Polyurethane rubber rolls have excellent physical, mechanical and special processing properties and therefore have a wide range of uses. In urethane rubber, the current dosage and casting type are the largest (about 65%) because, in addition to the cast type urethane rubber, there are many advantages over other types of urethane rubber.
Analysis of the application and performance of polyurethane rubber roller
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First, polyurethane rubber rubber roller and application:
Polyurethane rubber rolls have excellent physical, mechanical and special processing properties and therefore have a wide range of uses. In urethane rubber, the current dosage and casting type are the largest (about 65%) because, in addition to the cast type urethane rubber, there are many advantages over other types of urethane rubber. Such as: can be made into thick products, the product has a wide range of hardness, can make parts with complex geometric shapes, product reproducibility, good performance and so on. The production of thermoplastic polyurethane rubber has also increased rapidly (about 25%), mainly used as electrical insulation materials, mechanical parts, films and so on.
Second, polyurethane rubber has the following properties and uses:
1. The application of wear resistance is superior to other rubbers. Compared with steel, under dry friction conditions, her volume loss is about 6-7 times higher than that of steel, but if it is in polyurethane rubber roller and contact In addition, lubricants: water, oil or other solvents, changing the working conditions to lubrication friction, the polyurethane rubber roller wear resistance is better than steel.
Solid tire: Solid tire made of cast polyurethane rubber with a hardness of 90-95 degrees, used for internal transmission vehicles. For example: battery trolleys, farm transport vehicles, crane solid tires. The cross section of the polyurethane solid tire is not easy to wear because of its good tear resistance and wear resistance. Compared with the steel wheel, its hardness is smaller, so its friction is also smaller. In addition, the load capacity and service life of the polyurethane tire are 4-5 times larger than that of the rubber solid tire. Due to the small deformation, the rolling loss of the polyurethane tire Also small.
Rubber roller, steel, paper, textile, printing, glutinous rice and other industrial rubber rollers can be used with polyurethane casting rubber roller, which has good wear resistance, long service life and can improve labor productivity. In particular, rubber rollers for papermaking can reduce the wear of equipment and the like with polyurethane rubber rollers.
Tape polyurethane tape has good abrasion resistance, large friction coefficient, and can absorb noise, so it can be used as friction tape. A conveyor belt used in washing machines, sewing machines, typewriters, vending machines, transmission belts, and mining departments.
2. The application of oil resistance can be used to make printing rubber rollers, oil seals, oil rings and valve cushions. It can also be used for making O-rings, V-rings, piston cups and other natural rubbers. However, sometimes the additives in the oil may have an erosive effect on the polyurethane. Therefore, before ordering, please inform the environment of the rubber roller used by the Kezi rubber roller factory, and what chemical solvents need to be resistant, so that we can produce suitable for you. Polyurethane rubber roller to ensure your ease of use!
The seal is mainly because of its high hardness, good wear resistance, resistance to various organic solvents, small expansion, and for the structural requirements of some seals, the urethane rubber does not need to be reinforced to achieve the strength that can be achieved by other rubber fabrics. Polyurethane rubber sealing ropes and O-rings are generally only reciprocating seals.
Sealing ring polyurethane sealing ring has a series of valuable characteristics, high strength, high pressure resistance, and can withstand high liquid pressure, while the sealing ring does not bend, low temperature fluidity, compression deformation is small, so it can also be low pressure seal. Polyurethane sealing ring not only has oil resistance but also low friction coefficient and wear resistance, so it is suitable for making piston sealing ring and has long service life.
Dust seals Polyurethane dust seals have been successfully used for dust-proof parts of piston rods. The diamond-shaped dust-proof parts on the working machine can prevent dirt from entering the flexible conveyor and prevent wear. Dust-proof parts for hydraulic sealing systems.
3. The application of cushioning properties has been widely used as a cushioning material in famous products and military products. Polyurethane rubber has the fastest increase in modulus of elasticity at -20 to 30 degrees and the highest amplitude. In this temperature range, urethane rubber acts as a dynamic buffer material, and after being subjected to stress, the part can rapidly heat up and restore elasticity.
The damper is made of urethane rubber to make bumpers, shock absorbers and spring elements. The shock absorbing spring made of polyurethane with a hardness of 93 degrees is mounted on a coal transport vehicle in a single or double pair. The maximum trajectory is 50 MM under the load of 7 tons. The damper spring made of urethane rubber does not rupture due to excessive load, and its performance is excellent. A shock absorber made of urethane rubber used in vehicles such as automobiles and tanks has a smooth elastic curve after molding.
Die pad presses require high hardness of the rubber. In general, rubber requires a large amount of filler, which reduces the elasticity and affects the resistance and performance and service life. Polyurethane rubber has high hardness and high elasticity, and has good cushioning properties. Therefore, it can be used as a universal mold pad material for sheet metal press processing. In addition, special bending, punching, and embossing belt energy can be applied.
Cushion urethane rubber can be used as a variety of mechanical cushions, especially for automotive safety cushioning devices. It has been rapidly developed and its consumption has increased year by year.
4. Low friction coefficient The friction coefficient of polyurethane rubber is generally high, but it will be greatly reduced after adding additives such as disulfide molybdenum or silicone oil, and the wear resistance is further improved, becoming a self-lubricating material. . Such urethane rubber products are extremely useful for vibration or sliding, and can be used for motor couplings and automotive bearing seals, lift sliding wheels and transmission parts, and the like.
5. Application of electrical properties Polyurethane rubber products have quite good insulation properties and can be used for sheathing of wires and cables, and their electrical properties and low temperature performance are good.
Information Sources:
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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