Formula of low-temperature-resistant PVC (polyvinyl chloride) pipe

The invention discloses a formula applied to the field of agricultural water-saving irrigation facilities and used for enhancing the low-temperature resistance of a PVC (polyvinyl chloride) pipe. The formula of the product comprises 75-80 parts of PVC resin, 1-2 parts of a plasticizer, 1-2 parts of glycerin (C3H5(OH)3), 5 parts of a toner, 7-8 parts of a lubricant and 5-8 parts of a filling agent; carbon black is ordinary color carbon black; PVC resin is a powdery raw material; the plasticizer is DBP (dibutyl phthalate). According to the formula used for enhancing the low-temperature resistance of the PVC pipe, the low-temperature resistance of a drip irrigation belt is improved by adding C3H5(OH)3 to prevent the PVC pipe from frost cracking in the low-temperature environment. 本发明公开了种应用于农业节水灌溉设施领域中，用于增强聚氯乙烯管材耐低温性能的配方，该产品的配方是，聚氯乙烯树脂75-80份、增塑剂1-2份、丙三醇(CH(OH))1-2份、增色剂5份、润滑剂7-8份、填料剂5-8份；炭黑是普通色素炭黑；聚氯乙烯树脂是粉状原料；增塑剂是领苯二甲酸二丁酯(DBP)。本发明提供种用于增强聚氯乙烯管材耐低温性能的配方是通过加入丙三醇(CH(OH))，提高滴灌带的耐低温性能，在低温环境中，防止PVC管材出现冻裂的情况。