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

　　在塑料袋吹制過程中加入防冷劑。在合成樹脂或其混合物中加入少量的化學物質以改善成型或賦予產品某種特性。合成樹脂的分子結構不受這些物質在合成樹脂或其混合物中的分散影響。

　　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.

　　塑料添加劑的主要要求是:

　　The main requirements of plastic additives are:

　　率:在塑料加工和應用中能有效地發揮其應有的作用。添加劑的選擇應根據混合物的綜合性能要求。

　　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:可與合成樹脂相容。

　　(2) Compatibility: compatible with synthetic resin.

　　(3)耐久性:在塑料加工和使用過程中，不揮發、不滲漏、不遷移、不溶解。

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

　　(4)化學穩定性:在塑料加工應用過程中，不分解，不與合成樹脂等成分發生化學反應。

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

　　無毒:對人體無毒性作用。

　　Non toxic: non toxic to human body.

　　添加助劑的方法取決于:合成樹脂的物理形態和熔融特性;添加劑的物理形式和濃度;添加劑在混合物中的分散性和溶解度;混合物的更終物理狀態。采用高速攪拌、混合、擠出。添加劑的作用不僅取決于它的作用機理，而且取決于它加入的正確順序。

　　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.