Flame-retardant anti-poison high-temperature-resistant polypropylene co-extrusion film and preparation method thereof

Abstract

The invention discloses a flame-retardant anti-poison high-temperature-resistant polypropylene co-extrusion film and a preparation method thereof. The co-extrusion film comprises an outer layer, a bonding layer, a middle layer, a bonding layer and an inner layer from outside to inside, the outer layer is made of a blend of polyolefin resin, a flame retardant and color master batch; the bonding layer is made of any one of a maleic anhydride modified polypropylene polymer, an ethylene-methacrylic acid copolymer, linear low-density polyethylene or an ethylene-vinyl acetate copolymer; the middle layer is made of any one of polyvinylidene chloride, ethylene-vinyl alcohol copolymer or polyamide; and the inner layer is made of a blend of toughened resin, a flame retardant and color master batch.According to the method, the five-layer co-extrusion film is prepared from all layers of raw materials through multi-layer co-extrusion compounding equipment by adopting a multi-layer co-extrusion compounding process. The flame-retardant, anti-poison and high-temperature-resistant polypropylene film integrates flame retardance, poison prevention and high-temperature resistance, is excellent in flame retardance, thermal aging resistance, barrier property and tear resistance and soft in hand feeling, and is suitable for the field of protective equipment and biochemical packaging materials.

Description

technical field [0001] The invention relates to a polypropylene film, in particular to a flame-retardant, anti-toxic, high-temperature-resistant polypropylene co-extruded film and a preparation method thereof. Background technique [0002] Polypropylene film is widely used in packaging, chemical, construction, textile and other industries because of its low cost, high barrier, easy molding and stability. In the prior art, functional polypropylene films include flame-retardant polypropylene films, barrier polypropylene films, and low-temperature resistant polypropylene films. [0003] Due to its own structural characteristics, the limiting oxygen index of polypropylene is about 18%. It is a flammable material, and its flame retardancy is generally improved by adding flame retardants and synergists. The existing polypropylene flame retardant technology is mostly used in the fields of automobiles, parts of mechanical equipment, and electrical wires and cables. Polypropylene p...

AI Technical Summary

Problems solved by technology

Due to the usability requirements of protective equipment, the film needs to be soft. Usually, the method of adding toughening resin to the resin formula reduces the hardness of polypropylene and improves toughness, but the potential harm is that the temperature resistance of polypropylene film is significantly reduced. Performance, especially if it is placed continuously in a high temperature environment, the surface of the polypropylene film will appear discoloration, stickiness, and brittleness, which will affect the appearance and reliability of the equipment

[0006] Therefore, when polypropylene is used as a barrier film in protective equipment, polypropylene cannot take into account flame retardancy, anti-virus, high temperature resistance and flexibility at the same time, resulting in the failure of the excellent performance of polypropylene film, which limits its application range