Basic technology of rubber products:? The basic production process of rubber products includes six basic processes: plastication, mixing, calendering, extrusion, molding and vulcanization. ?
The processing technology of rubber is mainly to solve the contradiction between plasticity and elasticity. Through various processing means, elastic rubber is changed into plastic rubber, and various additives are added to make semi-finished products, and then the semi-finished products with plasticity are vulcanized to become rubber products with high elasticity and good physical and mechanical properties.
Extended data:
Structure of rubber:
Linear structure: the common structure of unvulcanized rubber. Because of its large molecular weight, the macromolecular chain is in the form of random curl curve without external force. When the external force acts and is removed.
The entanglement of force and coil changes, and the molecular chain rebounds, resulting in a strong recovery tendency, which is the origin of rubber's high elasticity.
Branched chain structure: the branches of rubber macromolecular chain gather to form gel. Gel is not good for rubber properties and processing. When rubber is mixed, all kinds of compounding agents often cannot enter the gel zone, forming local blank, unable to form reinforcement and crosslinking, and becoming the weak part of the product.
Cross-linked structure: linear molecules are connected with each other through some atoms or atomic groups to form a three-dimensional network structure. With the progress of vulcanization, this structure has been continuously strengthened. In this way, the free movement ability of the chain segment decreases, the plasticity and elongation decrease, the strength, elasticity and hardness increase, and the compression set and swelling degree decrease.
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