High-temperature-resistant high-pressure-resistant hose and production process thereof

Abstract

The invention relates to the technical field of PVC materials, in particular to a high-temperature-resistant high-pressure-resistant hose which sequentially comprises an outer layer, a second winding layer, a middle layer, a first winding layer and an inner layer from outside to inside, and the inner layer is prepared from the following raw materials in parts by weight: PVC, a plasticizer, a polymer of dipentaerythritol and sebacic acid, a high-temperature-resistant stabilizer, tackifying resin and a lubricant. The production process of the high-temperature-resistant high-pressure-resistant hose comprises the following steps of preparation of a first material, preparation of a second material, extrusion molding of an inner layer, preparation of a first winding layer, extrusion molding of a middle layer, preparation of a second winding layer and extrusion molding of an outer layer. By adding the 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 so that the toughness of the inner layer is further improved, and the inner layer is convenient to bend. Tthe heat resistance of the inner layer is improved by adding the heptadecenoic acid 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