Elastic breathable fold-type composite non-woven fabric and forming method

Abstract

The invention relates to an elastic breathable fold-type composite non-woven fabric and a forming method. The elastic breathable fold-type composite non-woven fabric comprises a non-woven fabric, multiple vent holes are formed in the membrane surface of an elastic membrane, the elastic membrane with the vent holes rebounds after being subjected to hot-pressing compositing with a surface-layer non-woven fabric and a bottom-layer non-woven fabric in a stretching state, and the elastic breathable fold-type composite non-woven fabric is formed, wherein the elastic membrane is located between the surface-layer non-woven fabric and the bottom-layer non-woven fabric. The elastic breathable fold-type composite non-woven fabric has the advantages that compositing of the surface-layer non-woven fabric, the bottom-layer non-woven fabric and the elastic membrane can be achieved without a hot melt adhesive, and therefore it is guaranteed that the breathability of the elastic membrane and the non-woven fabrics is not influenced by the hot melt adhesive; by designing the elastic membrane with the holes, not only is the stretch rate of the elastic membrane greatly increased, but also the advantages of being high in elasticity and stretch rate are achieved; by designing orifice bosses in the elastic membrane, compositing between the bottom-layer non-woven fabric and the boss orifices of the elastic membrane is achieved, and a precedent of a hollow multi-point supported through composite non-woven fabric is created.

Description

technical field [0001] The invention relates to an elastic air-permeable crepe composite non-woven fabric, which can combine the surface layer non-woven fabric and the bottom layer non-woven fabric on both sides of the elastic film in a stretched state without hot melt adhesive or stretching the non-woven fabric. The cloth and its molding method are mainly used for medical bandages and elastic waists of diapers, and belong to the field of manufacturing elastic bandages and waists of diapers. Background technique [0002] CN202213263U, titled "a composite nonwoven fabric", which is composed of at least one layer of elastic nonwoven fabric and at least one layer of elastic film. The elastic film is a polyurethane film. The elastic non-woven fabric and the elastic film are compounded by an adhesive. The adhesive is hot melt adhesive. The elastic non-woven fabric and the elastic polyurethane breathable membrane are both in a stretched state during the lamination operation, an...

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Problems solved by technology

Its shortcomings: First, when the composite non-woven fabric is composited, the elastic non-woven fabric and the elastic polyurethane breathable film need to be in a stretched state to complete the composite, and the elasticity of the elastic film of the non-woven fabric after composite molding is affected by the elasticity. Due to the restriction of woven fabrics, the obtained composite nonwoven fabric is limited by the elasticity of elastic nonwoven fabric, and its elasticity is very limited; the second is that the composite of elastic nonwoven fabric and elastic polyurethane breathable film depends on hot melt adhesive, and hot melt adhesive The basic resin is EVA resin which is copolymerized with ethylene and vinyl acetate under high temperature and high pressure, and the viscosity of EVA resin itself is very low, so a tackifier needs to be added, such as modified rosin (138 or 145), C5 petroleum resin, C9 petroleum Resin, terpene resin, etc., the addition of these components makes the viscosity of the hot melt adhesive stronger, but when it is used as a composite medium of elastic non-woven fabric and elastic polyurethane breathable film, it greatly blocks the air permeability of the elastic non-woven fabric, making the composite The air permeability of the formed composite non-woven fabric is greatly reduced, even poor

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