硬脂酸广泛应用于PVC塑料管材、板材、型材、薄膜的制造。
Stearic acid is widely used in the manufacture of PVC plastic pipes, plates, profiles and films.
是PVC热稳定剂，具有很好的润滑性和较好的光、热稳定作用。在塑料PVC管中，硬脂酸有助于防止加工过程中的"焦化"，在PVC薄膜加工中添加是一种有效的热稳定剂，同时可以防御暴置于硫化物中所引起的成品薄膜变色。
It is a heat stabilizer of PVC. It has good lubricity and better light and heat stability. In the plastic PVC tube, stearic acid helps to prevent the "coking" in the process of processing. It is an effective heat stabilizer added to the PVC film processing, and it can also defer the discoloration of the finished film caused by the sulfide in the sulfide.
硬脂酸在橡胶的合成和加工过程中起重要作用。
Stearic acid plays an important role in the synthesis and processing of rubber.
硬脂酸是天然胶、合成橡胶和胶乳中广泛应用的硫化活性剂，也可用作增塑剂和软化剂。在生产合成橡胶过程中需加硬脂酸作乳化剂，在制造泡沫橡胶时，硬脂酸可作起泡剂，硬脂酸还可用作橡胶制品的脱模剂。
Stearic acid is a widely used vulcanizing activator in natural rubber, synthetic rubber and latex. It can also be used as plasticizer and softener. Stearic acid is needed as an emulsifier in the production of synthetic rubber. In the manufacture of foam rubber, stearic acid can be used as a foaming agent. Stearic acid can also be used as a demoulding agent for rubber products.
硬脂酸在化妆品工业能对雪花膏和冷霜这两类护肤品起乳化作用，从而使其变成稳定洁白的膏体，硬脂酸还是制造杏仁蜜和奶液的主要原料。
In the cosmetic industry, stearic acid can emulsify the two kinds of cream and cold cream, making it a stable and whitening paste. Stearic acid is the main ingredient in the manufacture of almond honey and milk.