Classification of plastic materials
Plastic raw materials according to the molecular structure of the synthetic resin is divided into main thermoplastic and thermosetting plastic points: regarding the thermal plastic plastic refers to the repeated heating still plasticity plastic: PE/PP/PVC/PS/ABS/PMMA/POM/PC/PA commonly used raw materials. Thermosetting plastic mainly refers to the heating hardening synthetic resin plastic, like some phenolic resin and amino plastic, not commonly used.
In accordance with the scope of application can be classified as general plastics such as PE/PP/PVC/PS, engineering plastics such as ABS/POM/PC/PA commonly used several types of. Also and some special plastic such as resistant high temperature, high humidity, and resistance to corrosion and some other special purpose instead of plastic.
Material utilization and color processing
1. Plastic materials most can be recycled, but due to turn plastic nozzle (material) than general material to brittle, so it can only new hybrid materials (raw materials) used together, the largest proportion of no more than 25% is appropriate, should be based on customer requirements standard principle. Various types of plastic materials due to the different melting point required, by injection pressure, production must not be confused.
. due to plastic products and color matching, so the plastic raw materials can be divided into: pumping aggregates, toner material, material, and recently appeared with liquid in the plastic raw materials, coloring. Smoke grain feedstock is have pigment mixed into raw materials, every grain of plastic materials are colored, so the formation of product has stable color uniform. Toner and color kind material is put to use in color or toner mixing raw materials, low cost, and do not store a large number of non-ferrous materials. But the color is unstable and difficult in production control unity.
[category]
According to the thermal properties and processing properties
Thermoplastic: heat softened and can be heated and formed repeatedly.
Such as PVC plastic, polypropylene plastic
Thermosetting plastics: after heat curing can not be heated and then melt molding
Such as phenolic plastics, urea formaldehyde plastics
By use of points
General plastic: large production
Such as polyethylene, polypropylene, polyvinyl chloride
engineering plastic
Such as, polysulfone, polycarbonate, polyamide, polyoxymethylene polyphenylene ether
Special plastics
Such as medical plastics, conductive plastics, high temperature plastic