What is vulcanization? Many people who do not know this industry will have question marks about vulcanization in their hearts, so I will popularize it for you. The process of transforming linear macromolecules into three-dimensional network structures. Since the first use of sulfur to achieve cross-linking of natural rubber, it is called vulcanization. Today we mainly understand two important factors that affect the vulcanization process of rubber products.

1. The first factor affecting the vulcanization process of rubber products: vulcanization temperature

The vulcanization temperature of rubber products is the basic condition for the vulcanization reaction of rubber, which directly affects the vulcanization speed of rubber and the quality of products. Like all chemical reactions, the vulcanization reaction accelerates as the temperature increases, and more low-sulfur cross-links are likely to be formed; when the vulcanization temperature is low, the speed is slow, the formation efficiency is low, and more poly-sulfur cross-links are formed. The vulcanization temperature is generally applicable to Van't Hoff's law, that is, for every 8~10 increase in temperature (approximately equivalent to the steam pressure of one gauge pressure), the reaction rate approximately doubles; in other words, the reaction time is approximately reduced by half.

2. The second factor affecting the vulcanization process of rubber products: vulcanization pressure

The vulcanization pressure of rubber products is an important factor to ensure the geometric size, structural density and physical and mechanical properties of rubber parts. The main functions are as follows:

(1) Prevent the rubber compound from generating bubbles during the vulcanization molding process and improve the compactness of the product;

(2) Provide the power for the filling flow of the rubber material, so that the rubber material can fill the entire mold cavity within a specified time;

(3) Improve the adhesion between rubber and clips (curtains, etc.) and the resistance to bending of rubber products;

(4) Improve the physical and mechanical properties of rubber products.