General characteristics of the raw material of plastic toys and classification

1 plastic materials thermal expansion coefficient of linear expansion is much larger than the metal;
2 General Plastics stiffness lower than the metal one order of magnitude;
3 The mechanical properties of plastic materials under heat in a long time will be significantly reduced;
4 General plastic materials at room temperature and below its long-term yield strength stress force, there will be permanent deformation;
5 plastic materials are sensitive to damage to the gap;
6 The mechanical properties of plastic materials are usually much lower than the metal, but some composites specific strength and specific modulus than metal, if product design is reasonable, would better play from the superiority;
7 general enhancement of the mechanical properties of plastic raw materials heterosexual;
8 Some plastic materials will absorb moisture and cause changes in the size and performance;
9 Some plastics are combustible;
10 Plastic materials fatigue data is still rarely, be based on the requirements to be considered.
Plastic toys classification of raw materials
Plastic materials in accordance with the molecular structure of synthetic resins are thermoplastic and thermosetting plastics points: means for repeatedly heated thermoplastic plastic is still plasticity: a major PE / PP / PVC / PS / ABS / PMMA / POM / PC / PA and other commonly used materials. thermosetting plastics mainly refers to the heat-curing synthetic resin prepared in the plastic, like some phenolic plastics and amino plastics, not commonly used.
In accordance with the application of the main points are as common plastic [1] PE / PP / PVC / PS, etc., engineering plastics such as ABS / POM / PC / PA, etc. Several commonly used addition there are some special plastic such as high humidity and high temperature resistant corrosion and other special purposes as modified plastics obtained.