In recent years, due to the continuous research and development of new materials, polyurethaneTPUThe usage is continuing to increase, creating a low-cost, high-performance New opportunities for value-added industries. Polyurethane TPU not only has excellent high tensile strength, high tensile strength, toughness and aging resistance, but also is a mature environmentally friendly material. So what are the performance advantages of polyurethane TPU? Next, the editor will introduce it to you.
1. Superior wear resistance
Especially under working conditions in the presence of water, oil and other humidifying media, its wear resistance is often several times and dozens of times that of ordinary rubber materials. times. Although metal materials such as steel are very hard, they are not necessarily wear-resistant. For example, in the large water pumps in the Yellow River irrigation area, the metal orifice ring and protective ring of the flow-passing parts have been washed away by a large amount of sediment, and serious damage will occur within a few hundred hours. Wear and leak, but the mouth ring and protective ring covered with polyurethane elastomer have continued to operate for 1800 hours without wear and tear. Others such as the rubber rollers of the rice huller, the vibrating screen plate for coal preparation, Track and field tracks in sports fields, dynamic oil seals for cranes and forklifts, elevator wheels and roller skate wheels are also areas where polyurethane elastomers are used. One thing that needs to be mentioned here is to improve the elasticity of medium and low hardness polyurethane To improve the friction coefficient of body parts and improve the wear resistance under load, a small amount of lubricants such as aluminum disulfide, graphite or silicone oil can be added to this type of polyurethane elastomer.
2. Diversified performance
Through the selection of raw materials and the adjustment of the formula, it can be changed within a certain range to meet the different requirements of users for product performance. For example, hardness is often An important indicator for users of products is that polyurethane elastomers can be made into soft printing rollers with a Shore A hardness of about 20, and hard steel rolling rollers with a Shore D hardness of more than 70. This It is difficult for general elastomer materials to achieve. Polyurethane elastomer is a polar polymer material composed of many flexible segments and rigid segments. As the proportion of rigid segments increases and the density of polar groups increases, the elasticity The original strength and hardness of the body will increase accordingly.
3. Various processing methods
Polyurethane elastomer can be molded using the same plasticizing, mixing, and vulcanization processes as general rubber (referring to MPU); it can also be made It can be made into liquid rubber by pouring and compression molding or spraying, potting, and centrifugal molding (referring to CPU); it can also be made into pellets, which are molded by injection, extrusion, calendering, blow molding and other processes (referring to CPU) like ordinary plastics. Molded or injection molded parts can also be mechanically processed such as cutting, grinding, and drilling within a certain hardness range. The diversity of processing makes polyurethane elastomers very versatile and its application fields continue to expand.
4. Wide applicabilityZR-40 (pentamethyldipropylenediamine): Particularly effective for cold molded high-resilience foams, low-odor gel and foaming catalyst with good balance
LE-310: Low odor reactive gel catalyst applied to large sponges, new lowVOC amine gel catalyst, amine content exceeds 95%
LE-530: Reactive gel catalyst, used in various polyurethane foam products
DPA: Low-odor gel catalyst, outstanding balance and versatility provide good fluidity
TAP 1-methyl-4-(2-dimethylaminoethyl)piperazine: Excellent trimerization catalyst that can improve fluidity
DMDEE (2,2′-dimorpholindiethyl ether): Strong foaming catalyst, providing stable prepolymer system
DMAEE: low-density full-water rigid foam and low-density semi-rigid foam
BDMAEE bis-(2-dimethylaminoethyl) ether：High-efficiency foaming catalyst
BDMA (N,N-dimethylbenzylamine)：Polyurethane rigid foam catalyst, epoxy accelerator
DMEA (N,N’-dimethylethanolamine): Neutralizes acids in some rigid foam systems,
PMDETA (pentamethyldiethylenetriamine): Especially effective for HCFC/water-foamed hard foam, similar to PC5
