Polyethylene base resin composition for film and preparation method thereof

• Main Authors: XU HUIFANG, LI GUOXIN, LI PENGPENG, LI GUANGQUAN, CHENG PENGFEI, WEI FUQING, WU JIAN, LI YANQIN, MU RUIJUAN, WANG ZHE
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention discloses a polyethylene base resin composition for a film and a preparation method thereof, the polyethylene base resin composition for the film comprises low molecular weight polyethylene resin and high molecular weight polyethylene resin, the weight-average molecular weight of the low molecular weight polyethylene resin is 8000-25000, and the molecular weight distribution is 3-5; the weight-average molecular weight of the high molecular weight polyethylene resin is 250000-360000, and the molecular weight distribution is 10-15; the mass of the low-molecular-weight polyethylene resin accounts for 20-36% of the total mass of the low-molecular-weight polyethylene resin and the high-molecular-weight polyethylene resin. The high-molecular-weight polyethylene resin is generated in the low-molecular-weight polyethylene resin in situ, so that the mixing performance between the high-molecular-weight resin and the low-molecular-weight resin is improved, and the resin composition is relatively good in un