What can soften a hardened plastic?
The molecular structure of thermosetting plastics is the body structure, softening also occurs in heated, can plastic into a certain shape, but is heated to a certain extent or amount of curing agent, hardened stereotypes, re heating will not soften and change the shape of the. Thermosetting plastic molding after heating no softening, and therefore can not be recycled, such as epoxy resin, such as the common PEX (cross-linked polyethylene), unsaturated resin, phenolic resin, amino plastics, bakelite are thermosetting plastics. Thermosetting plastic forming process is more complex, so continuous production has some difficulties, but its good heat resistance, not easy to deformation, and the price is relatively low.
Thermoplastic structures are linear structures that soften or melt when heated and are plastically made into a definite shape and hardened after cooling. After heating to a certain extent, it softens again and hardens again after cooling. This process can be repeated many times. For example, most plastics, such as PE, PP, PVC, PPR and PS, belong to thermoplastic plastics. Thermoplastic molding process is relatively simple, can be continuous production, and has a high mechanical strength, so the development of very fast.
