Production line and preparation method of elastic and breathable arc-shaped folded type composite non-woven fabric

Abstract

The invention relates to a production line and a preparation method of required elastic and breathable arc-shaped folded type composite non-woven fabric or folded type anti-lateral-leakage non-woven fabric, and surface non-woven fabric and bottom non-woven fabric or non-woven fabric strips can be composited on two surfaces or two sides of an elastic and breathable membrane in a stretching state without application of hot melt glue or stretching of the non-woven fabric and the non-woven fabric strips and the required elastic and breathable arc-shaped folded type composite non-woven fabric or the folded type anti-lateral-leakage non-woven fabric can be formed along with springback reset of the elastic and breathable membrane. The production line comprises a PLC (programmable logic controller), elastic and breathable casting die forming roller groups are arranged below an elastic polymer resin casting die head, multiple pairs of longitudinal elastic and breathable membrane stretching roller groups are horizontally distributed on one side of the elastic and breathable casting die forming roller groups in sequence, composite forming roller groups are horizontally located on one side of the elastic and breathable membrane stretching roller groups at the tail end in the multiple pairs of longitudinal elastic and breathable membrane stretching roller groups, and the roller surfaces of the composite forming roller groups are covered with round grooves and bulge points in concave-convex-point matching.

Description

technical field [0001] The invention relates to a non-woven fabric on the surface layer and a non-woven fabric on the bottom layer or a non-woven fabric strip under the stretched state of the elastic breathable film without hot melt adhesive or stretching the non-woven fabric or the non-woven fabric strip. Composite on both sides or both sides of the elastic breathable film, and can form the required elastic breathable curved crepe composite non-woven fabric or crepe crepe anti-side leakage non-woven fabric production line and production method with the rebound of the elastic breathable film, It is mainly used for medical bandages, sanitary napkins, and diapers, and belongs to the field of composite non-woven fabric manufacturing. Background technique [0002] CN202213263U, titled "a composite non-woven fabric", which is composed of at least one layer of elastic non-woven fabric and at least one layer of elastic breathable film. The elastic air-permeable film is a polyureth...

AI Technical Summary

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 breathable film of the non-woven fabric after composite molding is affected by the elasticity. Restricted by non-woven fabrics, what is obtained is a composite non-woven fabric limited by the elasticity of elastic non-woven fabrics, and its elasticity is very limited; second, the composite of elastic non-woven fabrics and elastic polyurethane breathable membranes depends on hot-melt adhesives, while hot-melt adhesives The basic resin of the glue is EVA resin, which is copolymerized by 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 ingredients makes the hot melt adhesive more viscous, 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 elastic non-woven fabric, making it The air permeability of the composite non-woven fabric after composite molding is greatly reduced, even poor

Its shortcomings: it is not convenient for the compounding of non-woven fabrics on its membrane surface

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