Blister phenomenon often occurs after moulded rubber o-rings in china, so what exactly is the bloom phenomenon? What's the harm?
Blooming refers to the phenomenon of migration of liquid or solid rubber compound components from the interior to the surface. Common forms are "spraying powder", "spraying oil" and "spraying wax". "Powdering" is a rubber compound vulcanizing agent, accelerators, active agents, antioxidants, fillers and other ingredients that precipitate the surface of rubber powder (or vulcanized rubber) to form a frost-like layer; spray wax is a wax additive compound surface layer of plastic wax Deposition films; rubber compounds are injected softeners, lubricants, plasticizers and other liquid components that form a layer of oil on the deposition surface.

Frosting not only affects the appearance quality of the product, but also makes the surface of the product appear white, yellow, gray, and bluish. Sometimes bright and matte. But it also affects the process properties and physical properties of vulcanized rubber, plastic materials to reduce viscosity, not easy to shape and affect the bonding properties of rubber, fabrics and metal frames of products. Cream spraying can also cause severe aging of gums and scorched products. If the main components of the bloom are sulfur and accelerators, then the concentration and handling of the hardener near the surface of the stored bulk material can easily lead to scorch, which can cause uneven curing in the surface layer and during vulcanization.
The above is a brief introduction to the knowledge about moulded rubber o-rings in china frosting.