Foaming agent can be divided into physical foaming agent and chemical foaming agent.
The requirements for the physical foaming agent are: non-toxic, odorless, non corrosive, non combustion, good thermal stability, no chemical reaction in the gas state, and the diffusion speed in the plastic melt in the gas state is lower than that in the air. The commonly used physical foaming agents are air, nitrogen, carbon dioxide, hydrocarbons, freon, etc;Our company mainly produces Adhesive for Cable Inner、New Type PP Physical Foaming Insulation Material、PE /PP Physical Foaming Material For Coaxial Cable and so on.
Chemical foaming agent is a kind of substance that can release gas such as nitrogen and carbon dioxide when heated. The requirements for chemical foaming agent are: the gas released by its decomposition shall be non-toxic, non corrosive, non combustible, and have no influence on the molding, physical and chemical properties of products, the speed of releasing gas shall be controllable, and the foaming agent shall have good dispersion in plastics. Inorganic foaming agents such as sodium bicarbonate and ammonium carbonate, organic foaming agents such as azoformamide and azodiisobutyronitrile are widely used.
