The thermal stabilizer is basically a chemical method that can combine with hydrogen chloride and inhibit the further catalytic decomposition of polyvinyl chloride by hydrogen chloride. The metal salt of organic acids which can be mixed with polyvinyl chloride can be used as thermal stabilizer.

            Light stabilizer is chemically decompose PVC because of the action of light and release of hydrogen chloride gas does not produce harmful effects, but there are some light stabilizers are not, such as ultraviolet absorbent is purely physical way to make big and short wavelength uv energy wavelengths long and low energy, so that the ultraviolet part of the sunlight reduced damage to the film.

                In fact, the use of a single stabilizer often fails to meet the requirements for the production of polyvinyl chloride films, most of which are composed of several stabilizers. This stabilizer system can vary with the manufacturing conditions and application range of polyvinyl chloride films. The whole system in various stabilizers complementary to each other, so that the stability of the system to produce high in effect, this is known as synergy or synergistic effect, such as a liquid barium cadmium zinc compound stabilizer is has good synergistic effect.