Application in core foam:
Core foam is a polymer material, which is dispersed in solid plastic by a large number of gas micropores to form a lower density, lighter weight, higher specific strength and absorb shock load than pure plastic, and has excellent shock absorption. Isolated sound performance, low thermal conductivity, good thermal insulation, and excellent electrical insulation, corrosion resistance, and mold resistance. Almost all kinds of plastics can be made into foam, and foam molding has become an important field in plastic processing. First, a gas is introduced into the liquid or molten plastic to create micropores that cause the micropores to grow to a certain volume. Next, the microporous structure is fixed by physical or chemical means. The foaming method is mechanical, physical, and chemical in accordance with the manner in which the gas is introduced.
In daily production, the most commonly used core foam is chemical, using a chemical blowing agent. Commonly used chemical foaming agents, such as AC foaming agent, PVC foaming agent, OBSH foaming agent, silicone foaming agent, and the like. Thermoplastics can be foamed into foams using chemical blowing agents. For example, foam shoes in life, that is, additives using resins, plasticizers, foaming agents and other ingredients, are poured into an injection molding machine, and the material is foamed successfully by decomposition of the foaming agent.
The foam has excellent performance in terms of thermal properties, electrical properties and acoustic properties, and has an irreplaceable effect. Therefore, it can be used as a material for thermal insulation, sound absorption, shockproof, dielectric, floating, and the like. At the same time, the foam has the strength and rigidity, so that it can be glued with metal and non-metal panels to make sandwich panels. It can be used as a bearing member for bearing structural products, and at the same time it can be used for thermal insulation, sound absorption, sound insulation, shockproof, etc. effect. Since the beginning of the use of core foam in the United States in 1940, it has been widely used in the construction, aviation, marine, chemical, mechanical, agricultural and other sectors.