热固性塑料在加工过程中，受热先软化，然后固化成型，变硬后不能再软化，其

In the processing of thermosetting plastics, to heat softening, and then curing and molding, can soften and then hardens, a chemical change during processing thereof, adjacent to the body inter-crosslink molecular structure hardened into insoluble infusible substance, which heat resistance and stiffness are good, but lower mechanical strength.

Thermoset plastic in the processing process, heat first softened, then curing molding, hardening can no longer soften, chemical changes occurred in the processing process, adjacent molecules cross-linked into the body structure and hardened into an insoluble substance, its heat resistance and stiffness are good, but the mechanical strength is low.

In the process of processing, thermosetting plastics are softened by heat, then solidified and formed, and can't be softened after hardening. Chemical changes occur in the process of processing. Adjacent molecules cross-linked to each other to form a body structure and harden into an insoluble substance, with good heat resistance and rigidity, but low mechanical strength.