Flame-retardant PE breathable film composite material and preparation method thereof

Abstract

The invention discloses a flame-retardant PE breathable film composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 20 to 40 parts of linear low-density polyethylene, 5 to 10 parts of low-density polyethylene, 3 to 5 parts of polypropylene, 20 to 30 parts of micron-sized phosphorus pentoxide, 2 to 5 parts of micron-sized aluminum hypophosphite, 20 to 30 parts of calcium carbonate, 1 to 3 parts of a coupling agent, 3 to 5 parts of layered montmorillonite, 0.1 to 0.3 part of an antioxidant and 0.5 to 1 part of a lubricant. According to the invention, micron-sized phosphorus pentoxide is introduced into the composite material, can form fine holes after being stretched like calcium carbonate to play a role in ventilation, and can partially replace calcium carbonate, so the content of calcium carbonate is reduced; through the synergistic effect of micron-sized aluminum hypophosphite and layered montmorillonite, the flame retardant property of the composite material is improved; and by adding a small amount of LDPE and PP, the viscosity of the polymer melt is reduced, and the dispersion performance of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a flame-retardant PE breathable film composite material and a preparation method thereof. Background technique [0002] At present, PE breathable membranes are widely used in medical protective clothing, biochemical protective clothing, diapers, incontinence pads, sanitary napkins, baby warmers and packaging. With the continuous development of breathable membrane materials, the market demand for functional breathable membranes is increasing, such as antistatic breathable membranes, antibacterial breathable membranes, flame retardant breathable membranes, etc. [0003] At present, the flame-retardant PE breathable membrane is mainly used in fire-fighting biochemical isolation clothing and other fire-fighting protective clothing. It is required not only to have good air permeability and strength, but also to have good flame-retardant performance, and...

AI Technical Summary

Problems solved by technology

Due to the low oxygen index and special structure of PE material, it is difficult to modify its flame retardant, and there are few suitable flame retardants on the market to make it meet the VTM0 requirements

In order to ensure good air permeability, PE breathable film generally adds more calcium carbonate for blending modification. The addition of calcium carbonate makes the flame retardant modification of PE materials more difficult.

The main reason is that calcium carbonate increases the melt viscosity of PE, making it more difficult for flame retardants to disperse. At the same time, the increase in melt viscosity violates the flame retardant mechanism of PE melt droplets taking away heat, greatly reducing its flame retardant effect.

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