A high temperature and high pressure resistant hose and its production process

Abstract

The application relates to the technical field of PVC materials, a high-temperature and high-pressure resistant hose, which sequentially includes an outer layer, a second winding layer, an intermediate layer, a first winding layer, and an inner layer from the outside to the inside, and the inner layer consists of the following parts by weight: Made of raw materials: PVC, plasticizer, polymer of dipentaerythritol and sebacic acid, high temperature stabilizer, tackifying resin, lubricant. A production process for a high temperature and high pressure hose, comprising the following steps: preparation of the first material, preparation of the second material, extrusion molding of the inner layer, preparation of the first winding layer, extrusion molding of the middle layer, and second winding Layer preparation, extrusion of the outer layer. By adding a polymer of dipentaerythritol and sebacic acid, the toughness, mechanical strength, and high temperature aging resistance of the inner layer are improved. The pH value is adjusted to be less than 3 to further improve the toughness of the inner layer and make the inner layer easy to bend. The heat resistance of the inner layer is improved by adding heptadecenyl triglyceride.

Description

technical field [0001] This application relates to the technical field of PVC materials, more specifically, it relates to a high temperature and high pressure resistant hose and its production process. Background technique [0002] Hoses usually consist of a tube, a wire braid and a cover. Usually used to transport liquid, gas, slurry, etc. [0003] The material of the hose is usually PVC (polyvinyl chloride). PVC has poor thermal stability and is easy to be thermally decomposed, and the chloride ions produced after decomposition will be further automatically catalyzed and decomposed. Aging occurs, and the mechanical strength of the hose decreases after aging, resulting in bulging or leakage of the hose, which shortens the service life of the hose. Contents of the invention [0004] In order to improve the problem that the hose is easy to bulge or leak when transporting high temperature and high pressure in the hose, resulting in a short service life of the hose, the app...

AI Technical Summary

Problems solved by technology

[0004] In order to improve the problem that the hose is easy to bulge or leak when transporting high temperature and high pressure in the hose, resulting in a short service life of the hose, the application provides a high temperature and high pressure resistant hose and its production process