A kind of organic particle filled gas permeable membrane and preparation method thereof

Abstract

The invention discloses an organic particle filled breathable film, which comprises the following raw materials by weight: 35%-60% of polyethylene, 35%-55% of an organic particle filler, and 1%-10% of a processing aid, wherein the organic particle filler employs a highly cross-linked polymer. The invention provides the organic particle filled breathable film and the preparation method thereof. The organic particle filler used to substitute an inorganic particle filler has advantages of a controllable size, high degree of spheroidization, good compatibility with a resin matrix, easy processing, and no requirement of surface modification process; the prepared breathable membrane surface has uniform force and good flatness; at the same time, the hydrophobic organic particle filler is employed to substitute the hydrophilic inorganic particle filler, so as to endow the breathable film with better waterproofness and air permeability.

Description

technical field [0001] The invention relates to a gas-permeable membrane filled with organic particles and a preparation method thereof. Background technique [0002] In the preparation of polyethylene (PE) breathable membrane material, because the resin matrix is ​​relatively soft, it is often filled with inorganic particles to increase its strength. In actual production, the resin matrix, inorganic particle fillers and processing aids are often blended and granulated by a twin-screw extruder to prepare a breathable film masterbatch, and then the masterbatch is made into a film base by calendering, casting or blow molding. material, and then stretched to become a breathable membrane material with a certain number of pores, so that it has the special performance of waterproof and breathable. [0003] At present, the particle fillers in polyethylene breathable membrane materials are mostly inorganic particle fillers, mainly calcium carbonate, talc powder, magnesium carbonate...

AI Technical Summary

Problems solved by technology

Surface modification improves the compatibility of inorganic particles and resin volume to some extent, but the effect is only unsatisfactory

[0009] In addition, the size of inorganic particle fillers is relatively difficult to control, especially it inevitably contains many particles with a particle size smaller than the average particle size (D50)

When filling the resin matrix with filler particles, when the size of the filler particles decreases, the presence of small particle size fillers may cause die drool and smoke due to the increasingly difficult processing of the filled resin

Small particle size fillers caused by uneven particle size control increase the viscosity of the resin when mixing is too high, which increases the probability of mechanical failure of the equipment