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1. Polyurethane products, in the injection molding process, should pay attention to some aspects, so that you can avoid some problems?
Polyurethane products, in the injection molding process, should pay attention to some specific aspects, so that you can avoid some unnecessary problems or troubles. So, on this question, the answer is yes. Moreover, its specific aspect is to have suitable injection pressure and holding pressure. In addition, there may be other aspects.
2. On the polyurethane product, there is a bonding line, is it good or bad? In addition, what is dark spots or focal spots?
On polyurethane products, if they have a bonding line, then there will be adverse effects, because this will affect the appearance of the appearance of the polyurethane product, as well as the strength of the product. And its dark spots or focal spots are black dots or black stripes on the product.
3. Why is it better to use polyurethane with higher hardness?
This is because the use of polyurethane with a higher hardness can avoid some problems and reduce the rejection rate of the product. Polyurethane itself is relatively sticky, so it is prone to problems such as shrinkage or air bubbles, and its stability is not very good, so this measure will be solved to solve these problems.