What is the plastic model?
Thermoplastic plastics can be divided into general plastics, general engineering plastics, high-performance engineering plastics and other three categories.General plastics often refer to: ABS, PE, PVC, PMMA, PS, PP1. propylene butadiene - diene (ABS) copolymerAdvantage1, hard, easy to pledge2, easy to dye3, nonflammable4, shock resistance5, good surface
Thermoplastics: refers to the heat will melt, can flow into a mold cooling after molding, and then heated and melted plastic, can be used for heating and cooling, which produces a reversible change [] (liquid vs. solid), is called a physical change.
Thermosetting plastics: refers to after heating, the molecular structure of reticular pattern, but a combination of reticular polymer, even if the heating does not soften, showing the so-called [change] is non reversible, molecular structure changes (chemical changes) caused by.
