Two-component microporous film with waterproof, moisture-permeable and high elastic properties

Abstract

The invention discloses a waterproof and breathable two-component micro-pore film with high elasticity performance. The waterproof and breathable two-component micro-pore film comprises a micro-pore polyurethane film and a polytetrafluoroethylene film, wherein the micro-pore polyurethane film and the polytetrafluoroethylene film are bonded through an adhesive layer; the micro-pore polyurethane film is obtained by scraping precast polyurethane slurry on silicon oil release paper, sequentially baking in a drying oven with the gradient temperature of 80-150 DEG C, carrying out heat preservation at 150 DEG C and then cooling to a room temperature; the precast polyurethane slurry is prepared from the following components in parts by weight: 100 parts of polyurethane resin, 20-25 parts of dimethyl formamide, 32-35 parts of toluene, 12-15 parts of butanone, 8-9 parts of thermal expansion microspheres, 1.5-2.5 parts of 1,4-butanediol, 1.2-1.8 parts of polyacrylamide, 0.3-0.5 part of acrylate and 0.2-0.3 part of an organo-siloxane emulsion. The multifunctional two-component composite fabric disclosed by the invention is capable of preventing rainwater, benefiting for discharging sweat and vapor of a human body, and keeping the properties of preventing rainwater and discharging sweat and vapor for a long period of time, so that the fabric has relatively good comfortability and relatively wide application range.

Description

technical field [0001] The invention relates to a two-component microporous film with waterproof, moisture-permeable and high elastic properties, belonging to the technical field of textile fabrics. Background technique [0002] The waterproof and moisture-permeable membranes in the prior art are mainly hydrophilic waterproof and moisture-permeable membranes. The composite fabric made of this membrane has the mechanism of contacting sweat vapor with the surface of the fabric and transmitting it to the outside world through hydrophilic groups. The biggest problem with this kind of fabric is that the hydrophilic group absorbs water molecules, making the fabric very thick, wet and cold, and the human body will feel uncomfortable when wearing it. There is also a microporous film based on the principle of nanotechnology, mainly based on polyurethane microporous film and polytetrafluoroethylene film. These two films have different advantages and disadvantages. Polyurethane micropo...

AI Technical Summary

Problems solved by technology

The PTFE film, due to its special microporous structure (reticular), has windproof, waterproof, and moisture permeability properties that microporous polyurethane films cannot have. It is superior to traditional polyurethane microporous films, but its disadvantages It is also obvious that the elasticity of this material is basically zero, so this film material cannot well adapt to the film caused by the stretching of the fabric, whether it is in the process of compounding with the fabric or in the process of high-intensity strenuous exercise. Damage, easy to cause the decline of waterproof performance and its bonding performance with fabrics

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