Calcium sulfate whisker modified ethylene-vinyl alcohol copolymer and preparation process thereof

Abstract

The invention discloses a calcium sulfate whisker modified ethylene-vinyl alcohol copolymer and a preparation process thereof. The calcium sulfate whisker modified ethylene-vinyl alcohol copolymer is prepared from the following raw materials in part by weight: 100 parts of ethylene-vinyl alcohol copolymer, 12 to 28 parts of calcium sulfate whisker, 8 to 15 parts of montmorillonite, 5 to 10 parts of polystyrene, 5 to 10 parts of hexadecyl quaternary ammonium salt, 1 to 4 parts of dioctyl phthalate serving as a plasticizer, and 1 to 3 parts of silane coupling agent KH550. The invention also discloses the preparation process for the calcium sulfate whisker modified ethylene-vinyl alcohol copolymer. The calcium sulfate whisker modified ethylene-vinyl alcohol copolymer has high low-temperature impact strength and bending strength and good blocking performance, and is particularly suitable for low-temperature packing occasions such as low-temperature fresh keeping transportation of fresh milk, fruits and seafood.

Description

technical field [0001] The invention relates to an ethylene-vinyl alcohol copolymer and a preparation process thereof, in particular to a calcium sulfate whisker modified ethylene-vinyl alcohol copolymer and a preparation process thereof. Background technique [0002] Ethylene-vinyl alcohol copolymer (EVOH) is the product of complete hydrolysis of ethylene-vinyl acetate copolymer. It is a crystalline high polymer with excellent gas barrier properties, oil resistance, organic solvent resistance and antistatic properties, and transparency. High, and has broad application prospects in the fields of food and pharmaceutical packaging. However, EVOH is relatively hard at low temperature, has poor impact resistance and poor bending fatigue resistance, which also limits its application range. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of existing EVOH materials and provide a calcium sulfate whiske...

AI Technical Summary

Problems solved by technology

However, EVOH is relatively hard at low temperature, has poor impact resistanc