[[TitleIndustry]]

Thermoplastic polyurethane (TPU) elastomer foam molding method from Rainbow TPU

Date:Sep 17, 2019

Thermoplastic polyurethane elastomer (TPU) is also known as thermoplastic polyurethane rubber, belong to the block polymer, by thermodynamic incompatible (different chloric acid ester) of hard segment and soft segment (polyester and polyether), is a kind of heating can join solvents can dissolve the plasticizing, elastomer, there are two phase microstructure, its molecular chain basic is linear, have certain or a few physical crosslinking.
TPU has excellent physical and mechanical properties, such as high strength, high toughness, high elasticity, high modulus, as well as excellent comprehensive properties such as resistance to chemical corrosion, abrasion resistance, oil resistance, strong shock absorption, and good processing performance. It is widely used in national defense, medical care, food, automobile, clothing, outdoor sports and other industries.
1. Physical foaming method of TPU
Physical foaming method is to add physical foaming agent in the polymer matrix, make it completely dissolved in the melting state of the polymer, through extrusion, injection, molding foam products.Commonly used physical blowing agent has supercritical carbon dioxide, supercritical nitrogen and so on.
2. Chemical foaming method of TPU
Chemical foaming method refers to the method that the chemical foaming agent is decomposed by heat within a certain temperature range to release one or more gases to make plastics foaming.It can also be foamed by the gas released by the activation reaction between the components.



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 www.rainbowtpu.com


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