Professional manufacturer of automotive fluid pipeline products-Hengshui Longjie rubber and plastic products
25
2019-05
Characteristics of rubber and plastic products
1. When rubber products are molded, they are subjected to high pressure, and the cohesive force inherent in the elastomer cannot be eliminated. When demolding, there is often extremely unstable shrinkage (the shrinkage rate of rubber varies depending on the type of rubber), which requires a period of time to stabilize. Therefore, when designing a rubber product, whether in terms of formulation or mold, careful calculations and considerations are necessary. Otherwise, it is easy to produce products with unstable dimensions, resulting in poor product quality. 2. Rubber is a thermosetting elastomer, while plastics are thermoplastic. Due to the different types of vulcanizates, the temperature range for molding and curing also varies.
25 May,2019
02
2018-11
1. Silicone Rubber (Q) Silicone rubber is divided into heat-cured and room temperature-cured types. The heat-cured type is further divided into methyl silicone rubber (MQ), methyl vinyl silicone rubber (VMQ, which has the highest usage and product brand), and methyl vinyl phenyl silicone rubber (PVMQ, which is resistant to low temperatures and radiation). Other types include clear silicone rubber and fluorosilicone rubber. MQ is a colorless, transparent, high-viscosity, plastic, linear polymer compound, with a main chain composed of silicon and oxygen atoms, and the side groups connected to silicon are methyl groups, with a molecular weight between 500,000 and 800,000. VMQ is a colorless, transparent, high-viscosity, plastic, linear polymer compound, with a main chain.
02 Nov,2018
25
2019-05
Chemical composition of rubber and plastic
By analyzing the chemical composition of natural rubber, it was found that its basic component is isoprene. This inspired people to use isoprene as a monomer for polymerization reactions, resulting in synthetic rubber known as isoprene rubber. The structure and properties of isoprene rubber are essentially the same as those of natural rubber. At that time, isoprene could only be obtained from turpentine, which limited the source of raw materials, while butadiene was abundantly available. Therefore, a series of synthetic rubbers were developed based on butadiene, such as cis-butadiene rubber, styrene-butadiene rubber, nitrile rubber, and chloroprene rubber. With the development of the petrochemical industry, raw materials are obtained from oil field gas and refinery gas through high-temperature cracking and separation.
25 May,2019
02
2018-11
What size hydraulic oil pipe should be matched with a 140 breaker?
The model of the 140 hydraulic breaker is designed for excavators with a hammer diameter of 140mm, suitable for 20-32 ton excavators. It is new, powerful, stable, and durable. Models T250 and F270 are available in two types: triangular and straight. Product parameters for the hydraulic breaker category T250 total weight (triangular) kg 1548 total length mm 1676 drive oil pressure Kg/cm2 F160-180 drive oil flow L/min 120-150 impact frequency Bpm 320-660 rod diameter Mm 140 compatible excavator Ton 20-30.
02 Nov,2018
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