Rubber Characteristics
1. When rubber products are molded, they are pressed under great pressure. Because the cohesive force of the elastic body cannot be xc, unstable shrinkage often occurs when the rubber is released from the mold (the shrinkage rate of rubber varies depending on the type of rubber). It takes a period of time to become stable. Therefore, when a rubber product is designed, no matter the formula or the mold, it is necessary to carefully calculate and match. Otherwise, it is easy to produce unstable product size and poor product quality.
2. Rubber is a hot-melt thermosetting elastomer, while plastic is a hot-melt cold-setting elastomer. Due to the different types of sulfides, the temperature range of rubber molding and curing is also quite different, and it may even be affected by climate changes and indoor temperature and humidity. Therefore, the production conditions of rubber products need to be adjusted appropriately at any time. If not, the quality of the products may vary.
3. Rubber products are made of mixed rubber made from rubber raw materials after mixing in an internal mixer. The formula is designed according to the characteristics of the required rubber products during mixing, and the required product hardness is determined. The product is molded by a rubber flat vulcanizer. After the product is formed, the flash treatment is carried out to make the surface of the product smooth and burr-free.
4. The aging test of rubber products belongs to the category of aging test. Rubber aging refers to the phenomenon that the performance structure of rubber and products changes during processing, storage and use due to the combined effect of internal and external factors, and then loses its use value. It manifests as cracking, stickiness, hardening, powdering, discoloration, mildew, etc.
