1. Should attention be paid to certain aspects during the injection molding process of polyurethane products to avoid any problems?

During the injection molding process of polyurethane products, attention should be paid to certain specific aspects to avoid unnecessary problems or troubles. So, on this question, the answer is yes. In addition, its specific aspect is to have appropriate injection pressure and holding pressure. In addition, there may be other aspects.

2. Is the appearance of adhesive lines on polyurethane products good or bad? Also, what is a black dot or focus?

If there is a combination line in polyurethane products, it will have adverse effects because it will affect the appearance of the polyurethane product and the strength of the product in this regard. Black spots or focal spots refer to black semicircles or black stripes on the product.

3. Why choose polyurethane with higher hardness?

This is because selecting polyurethane with higher hardness can avoid some problems and reduce the scrap rate of the product. Polyurethane itself is a relatively sticky mold, so it is prone to shrinkage or bubbles, and its stability is not very good. Therefore, the above measures will be taken to solve these problems.