Rubber seals Whitening academic term is also called frosting. After the rubber product is vulcanized and molded, it is often left standing for a period of time, and the surface is like covered with white dust. But it is actually the release of rubber compounding agent that forms frost spraying. For the whitening phenomenon of rubber products, Rubber is divided into unvulcanized rubber (hereinafter referred to as rubber compound) and vulcanized rubber (hereinafter referred to as product). Rubber frosting includes rubber surface frosting and product surface frosting. Bloom is the appearance of liquid or solid additives moving from the inside of rubber to the outside of rubber. so When the internal compounding agent of rubber is separated, it constitutes frost spraying. To sum up, there are three ways of rubber frosting. That is, powder spraying, wax spraying, oil spraying (also known as exudation). Powder spraying refers to the separation of vulcanizing agent, accelerator, activator, antioxidant, filler and other powder additives on the rubber surface to form a layer of powder Things. Wax spraying means white wax, ground wax and other waxy substances are separated on the rubber surface to form a wax film. Oil injection is a layer of oil formed by liquid additives such as softener, tackifier, lubricant, plasticizer, etc. separated on the surface of rubber.  

In practice, the rubber appearance is sometimes presented in one way, sometimes in two or three ways.

The R&D personnel of our company found that the common reasons were divided into several categories: improper formula design, improper process operation, fluctuations in raw material quality, poor storage conditions, rubber aging, etc. Since we know all the reasons, we should grasp all the processes of making products, so as to make products with better quality. If such products are made, our rubber products enterprises should scrap all products and strive to give customers every qualified product.