Degradable porous film for wind prevention, ventilation and bacteriostasis

Abstract

The invention discloses a degradable porous film for wind prevention, ventilation and bacteriostasis, which is prepared by the steps of: adjusting the liquid temperature of a reactor to 30 DEG C, and uniformly mixing butanone, dimethylformamide, toluene and polyurethane resin at the first stirring rate according to the mass ratio of 10:10:25:100 to form a first primary resin solution; slowly adding 1, 6-diisocyanate hexane into the first primary resin solution to form a first primary resin mixed solution; mixing the solvent which is formed by water and the butanone with the first primary resin solution to form the first primary resin mixed solution; mixing the regulated resin mixed solution with N-methylethanolamine; filtering the regulated first primary resin mixed solution by a nylon net of 100-200 meshes, so the filtered first primary resin mixed solution is obtained; and drying the macromolecular mixed resin which is scraped on the silicon oil release paper in a tensioning state by four stages. The porous film has uniform and dense micropores at a nanoscale of 50-200nm, has good wind prevention, moisture permeation, waterproofness, ventilation and excellent bacteriostasis, and is contributed to maintaining the long-term dryness of the film surface and wearing health when being used.

Description

technical field [0001] The invention relates to a degradable porous film used for windproof, air-permeable and antibacterial, and belongs to the technical field of textile fabrics. Background technique [0002] The existing polyurethane film is composed of a single-component copolymer, and the hard segment and the soft segment are arranged alternately along the macromolecular chain. The hard segment is hydrophobic, it can prevent water droplets from passing through, and has a waterproof effect; the soft segment is hydrophilic, it can interact with water molecules, absorb water on the side of high humidity by means of hydrogen bonds and other intermolecular forces, and pass through the macromolecule The hydrophilic group on the chain is transferred to the low humidity side for desorption, so as to achieve the effect of moisture permeability. The process of moisture permeability is "adsorption-diffusion-desorption". The disadvantage is that this kind of non-porous moisture-p...

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Problems solved by technology

The disadvantage is that this kind of non-porous moisture-permeable film has a very limited moisture permeability and can reach 5000g / m according to ASTM E96BW 2 / D, it is difficult to meet the needs of sweat vapor generated rapidly during intense exercise, and it is easy to make the wearer feel a heavy sense of dampness

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