Nucleating agent is suitable for incomplete crystalline plastics such as polyethylene and polypropylene. By changing the crystallization behavior of the resin, it can speed up the crystallization rate, increase the crystallization density and promote the miniaturization of the grain size, so as to shorten the molding cycle, improve the transparency and surface of the product. A new functional additive for physical and mechanical properties such as gloss, tensile strength, rigidity, heat distortion temperature, impact resistance, and creep resistance.

Nucleating agent refers to a functional chemical additive that can change part of the crystallization behavior, improve the transparency, rigidity, surface gloss, impact toughness and thermal deformation temperature of the product, shorten the molding cycle of the product, and improve the processing and application performance of the product.

The nucleating agent is used as the modification assistant of the polymer, and its mechanism of action is mainly: in the molten state, since the nucleating agent provides the required crystal nucleus, the polymer changes from the original homogeneous nucleation to the heterogeneous nucleation, Thereby, the crystallization speed is accelerated, the grain structure is refined, and it is beneficial to improve the rigidity of the product, shorten the molding cycle, maintain the dimensional stability of the final product, inhibit light scattering, improve the transparency and surface gloss and the physical and mechanical properties of the polymer. (such as stiffness, modulus), shorten the processing cycle, etc. As an important class of nucleating agents, the main function of the transparent agent is to improve the optical effect of the polymer. The research and development of nucleating agents in my country began in the 1980s, and there are many types. Now practical, cheap and commercial nucleating agents can be mainly divided into inorganic nucleating agents, organic nucleating agents and polymer nucleating agents. . In addition, the transformation agent that converts the α-crystal form in PP to the β-crystal form is usually also classified as a nucleating agent.