The outer layer of polyurethane sandwich panels color steel, aluminum, copper and other advanced metal materials, the inner layer with high weathering galvanized color plate, ,
To ensure measurement accuracy of the components, the polyol raw material is generally at 25 ~ 50 ° C constant temperature metering, transport, some chain extender,
How to avoid generating a large volume of soft polyurethane foam "scorch" and spontaneous combustion adjustment formula, the control of water should not exceed 4.5 parts
Polyurethane Foam is generally room temperature foam molding process is relatively simple. Construction can be divided according to the degree of mechanization and mechanical foaming foaming hand;
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