There are many grades of PVC. The viscosity or K value commonly used in the industry indicates the average molecular weight (or average degree of polymerization) of PVC, that is, the length of the PVC molecular chain, which determines the grade of the resin and the corresponding processing parameters. The molecular weight of the resin is related to the physical and mechanical properties of the product.
PVC used to be the largest general-purpose plastic in the world, and it is widely used. It is widely used in construction materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foam materials, sealing materials, fibers, etc
SG3 (K-70, S1300): mostly used for soft products, hoses, wires and cables, films, shoe materials, toys, auto parts etc.
PVC RESIN SG3 has high purity, less fish eyes, easy to blister, high temperature resistance, insulation, soft product texture, etc. It is mainly used to produce soft products such as wires and cables, agricultural films, conveyor belts, and daily plastic products.
PVC RESIN SG3,Pvc Resin Sg3 Sg5 Sg8,Pvc Resin K70,Pvc Resin Powder Sg3,Suspension Pvc Resin Sg3 Henan Shunbang Chemical Industry CO.,Ltd , https://www.sbpolymer.com
Thrust bearings used in the installation of the engine and torque converter are usually installed with the engine and torque converter in an eccentric condition. If eccentricity is not allowed, the bearing ring guard and the retainer will become hot and cause wear. Therefore, there are two requirements in the market: (1) allowing large eccentricity and long life; and (2) integrating the bearing ring and the retainer for the purpose of embedding. However, the bearings of the old structure can not meet these two functions. Either even if large eccentricity is allowed, the structure is still separate; either a one-piece structure is used, but a large eccentricity is not allowed.
Eccentric bearing ring integrated thrust needle roller bearing realizes long life by adopting the following three measures while realizing the integral structure of the bearing ring: (1) In order to make the gap between the bearing retainer and the bearing ring in the radial direction It is set to be larger than the eccentric amount, and the internal structure is improved; (2) FEM analysis is used to optimize the shape and thickness of the holder to improve the strength of the retainer; (3) to prevent surface damage caused by the reduction of lubricating oil. A guide groove is designed in the bearing ring. In addition, its integral structure is realized by using the bearing ring arm claw structure and the snap structure. By minimizing the number of parts, not only is cost control increased, but it is also easy for customers to perform assembly operations.
PVC Resin is a kind of non-crystalline linear polymer compound. The larger the relative molecular mass, the higher the viscosity, the higher the molecular weight, and the higher the tensile strength, impact strength, and elastic modulus of the product, but the flow of the resin melt Decline in sex and plasticity. The viscosity number is usually used to indicate the molecular weight of the polymer, and the polymer model is divided
Eccentric thrust needle roller bearing life is extended 4 times
NTN Corporation of Japan developed and introduced the "eccentric bearing ring integrated thrust needle roller bearing". With the integrated structure of the bearing ring, the life of the eccentricity within 0.5mm is extended to more than four times that of the old product (compared to the company's products) by improving the internal structure.