Xinhua Xu rubber goods and materials performance analysis

Rubber is one of the important basis for the national economy of the traditional industries, product variety, widely used in industrial fields transportation, aerospace, machinery and electronics. In addition, many rubber products can be directly used as the final product aspects of daily life, sports activities and health care and so on. Rubber products industry has been rapid development, market demand is relatively strong, industrial structure adjustment, which yield a variety of products has been ranked first in the world.

When operating construction machinery, hydraulic system due to power losses leaving the oil fever, coupled with the influence of the outside temperature (especially in the summer), make a sharp increase in oil temperature. Oil use higher the temperature, the banana easy to aging, deterioration of elasticity, strength and hydraulic seal sealing performance, the hose will soon burst. Hose ends have a metal jacket coat, jacket hose middle section hydraulic seal protection tube. Hydraulic seal with good resistance to heat and ozone, weather aging properties and resistance to chemical acid-base properties; hydraulic seal good cushioning and elasticity; independent bubble structure, low water absorption; good hydraulic seal cracking resistance wear resistance, high strength; hydraulic seal good sound absorption characteristics, noise significantly. Thus, in operation, when the hydraulic system temperature is too high, too fast, timely identification of reasons, be excluded; summer job, especially continuous operations, shall take the necessary measures to cool.

After Xu Xinhua rubber mixer mixing is carried out by a rubber material mix made for raw materials, according to the desired characteristics at the time of mixing of rubber products and design formula, and set the desired product hardness. Products produced by the flat vulcanized rubber molding machine for molding. Finally, burrs after molding process, the surface treatment smooth burr. Structures linear structure: general structure unvulcanized rubber. Because of large molecular weight, no external force, was fine dough. When the external force, the external force is removed, the degree of entanglement fine group changes, the molecular chains rebound occurs, have a strong tendency to recovery, which would be the origin of highly elastic rubber. Branched structure: branched chain macromolecular aggregates of rubber to form a gel. Gel rubber properties and processing are negative. When mixing various ingredients often progress gel region, the formation of local blank, can not form a reinforcement and crosslinking, become weak parts of the product.

Physical properties of hydraulic seal. Natural rubber has high elasticity at room temperature, slightly plastic, has very good mechanical strength, low hysteresis loss, when many low heat deformation, so the flex resistance is also very good, and because the non-polar rubber, so that good electrical insulation properties.

Rubber, with plastic, fiber and known as the three synthetic materials, is the only polymer material having a high degree of scalability and excellent elasticity. The rubber is first maximum elastic modulus is very small, and high elongation. Secondly, it has a very good corrosion resistance and permeability to various chemical media and electrical insulation properties. Some more special synthetic rubber with good oil resistance and temperature resistance, resistance to fatty oil, lubricating oil, hydraulic oil, fuel oil and solvent swelling; cold can be as low as -60 ? to -80 ?, the heat can be high to + 180 ? to + 350 ?. Rubber seals are also resistant to various flexing, bending, because of the small hysteresis loss. The third characteristic of rubber that it can be used with a variety of materials and blending, compounding, thus modified, in order to get a good overall performance.