Recently, the temperature has dropped sharply. Winter is coming. When winter comes, plastic bags will harden because of the temperature.

　　在塑料袋吹制过程中加入防冷剂。在合成树脂或其混合物中加入少量的化学物质以改善成型或赋予产品某种特性。合成树脂的分子结构不受这些物质在合成树脂或其混合物中的分散影响。

　　In the process of plastic bag blowing, add refrigerant. A small amount of chemicals is added to the synthetic resin or its mixture to improve the molding or give the product certain characteristics. The molecular structure of the synthetic resin is not affected by the dispersion of these substances in the synthetic resin or its mixture.

　　塑料添加剂的主要要求是:

　　The main requirements of plastic additives are:

　　率:在塑料加工和应用中能有效地发挥其应有的作用。添加剂的选择应根据混合物的综合性能要求。

　　High efficiency: in plastic processing and application can effectively play its due role. The selection of additives shall be based on the comprehensive performance requirements of the mixture.

　　(2)相容性:可与合成树脂相容。

　　(2) Compatibility: compatible with synthetic resin.

　　(3)耐久性:在塑料加工和使用过程中，不挥发、不渗漏、不迁移、不溶解。

　　(3) Durability: no volatilization, no leakage, no migration and no dissolution in the process of plastic processing and use.

　　(4)化学稳定性:在塑料加工应用过程中，不分解，不与合成树脂等成分发生化学反应。

　　(4) Chemical stability: in the process of plastic processing and application, no decomposition, no chemical reaction with synthetic resin and other components.

　　:对人体性作用。

　　Non toxic: non toxic to human body.

　　添加助剂的方法取决于:合成树脂的物理形态和熔融特性;添加剂的物理形式和浓度;添加剂在混合物中的分散性和溶解度;混合物的更终物理状态。采用高速搅拌、混合、挤出。添加剂的作用不仅取决于它的作用机理，而且取决于它加入的正确顺序。

　　The method of adding additives depends on: physical form and melting characteristics of synthetic resin; physical form and concentration of additives; dispersion and solubility of additives in mixture; final physical state of mixture. High speed mixing, mixing and extrusion are adopted. The function of additives depends not only on its mechanism of action, but also on the correct order of its addition.