Preparation method of soft and hard integrated PVC pipe

• Main Authors: LIU XIAOFEI, LI YANG, ZHAO YUPING, DING XUEJIA, GUO SHENGLI, HUA JUNJUAN
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses a preparation method of a soft and hard integrated PVC pipe, wherein the conduit material comprises a polyvinyl chloride resin, and comprises, 5-20 parts by weight of an acrylate cross-linking agent, 10-30 parts by weight of a plasticizer, 1-4 parts by weight of a stabilizer, 0.1-3 parts by weight of polyethylene wax and 0.2-3 parts by weight of an anti-yellowing agent based on every 100 parts by weight of the polyvinyl chloride resin serving as base resin and contained in the material. The method comprises the following operation steps: accurately weighing and granulating the contained raw materials, and drawing a pipe in an extruder to obtain a PVC hose; and shielding a soft section required by the obtained PVC hose by using an irradiation shielding plate, and performing irradiation processing on a hard section required by the PVC hose to obtain a product. The method has the advantages that different hardness changes can be achieved on the same PVC guide pipe,that is, one section of