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Wipe fender foam process of several commonly used foaming process(Hits:) 
Origin Author Add Time2016-01-21
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According to the relevant professionals to speak, wipe fender foam in the production process of the most commonly used foaming process are the following:

A step foaming process: raw material step polyether or polyester polyol (white material) and a polyisocyanate (black material), water, catalysts, surfactants, blowing agents, other additives and the like is added, with stirring at high speed foaming after mixing.

Second, the prepolymer method: prepolymer is a foaming process method (white material) and (black material) first made prepolymer, then adding water, catalysts, surface-active agents in the prepolymer, other additives, etc. In high speed stirring mixing foaming, after curing at a certain temperature curing can be.

Third, the manual foaming method: that is, after all the ingredients accurately weighed, placed in a container and then immediately mixing these materials, foam injected into a mold or need space to fill. Note: Be sure to polyisocyanate (black material) is weighed into the final say.

Fourth, the semi-prepolymer method: is the part of polyether polyol (white material) and diisocyanate (black material) first prepolymer is made, then the other part of the polyether or polyester polyol and a diisocyanate, water, catalysts, surfactants, other additives and the like is added, with stirring at a high speed mixing foaming.

keyworks:Wipe fender foam process of several commonly used foaming process,Yongkang Jiulong Tools Co., Ltd.

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