PP plastic and PP recycled materials may cause shrinkage problems in products due to various external reasons after molding. If appropriate cooling temperatures and post-treatment processes are used during production, this shrinkage can be reduced. The shrinkage problem of PP products is mainly mani

Basic reason: From the perspective of plastic, the reasons for size changes are as follows:1. Changes in pressure distribution within the mold cavity can cause size changes;2. For crystalline plastics, changes in crystallinity due to changes in cooling rate can cause changes in size;3. Changes in pr

In the design process of plastic injection molding molds, it is important to clarify the forming shrinkage rate. Explain its forming shrinkage rate. It reflects the forming shrinkage rate, cavity surface temperature, and injection molding pressure of several main thermoplastic materials.The main flo

Engineering plastics - refers to a type of high-performance polymer material that can be used as a structural material, withstand mechanical stress over a wide temperature range, and be used in harsh chemical and physical environments.Performance characteristics of engineering plastics1. Capable of