Classification of plastics in the plastic packaging industry
Author: ComeFrom: Date:2023/4/18 10:57:29 Hits:374
Plastics can be divided into two categories: thermoplastics that can be repeatedly melt-molded for many times and can basically maintain their characteristics, and thermosets that can only be melted once. According to its use, it can be divided into general-purpose plastics with wide use, cheap price and good comprehensive performance, such as PE, PP, PVC, PS, and amine-based plastics have good physical and mechanical strength, and may replace metals used in engineering plastics such as ABS, nylon, polyester, POM, TPX-1, etc. As well as a class of engineering plastics with special properties in a certain performance, such as: special plastics with particularly good radiation resistance, high temperature resistance, etc., such as: polyaryl sulfone, liquid crystal polymer, etc. According to the crystallization size of thermoplastic resin molecules, thermoplastics can be divided into two categories: amorphous polymers and crystalline polymers.
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