Elastic and breathable arc-shaped crepe composite non-woven production line and production method

Abstract

The present invention relates to a method that can stretch the surface layer non-woven fabric and the bottom layer non-woven fabric or the non-woven fabric strip in the stretched state of the elastic breathable film without needing hot melt adhesive or stretching the non-woven fabric and the non-woven fabric strip. It is compounded on both sides or both sides of the elastic breathable film, and can form the required elastic breathable arc-shaped crepe composite non-woven fabric or crepe anti-side leakage non-woven fabric production line and production method with the rebound and reset of the elastic breathable film. Including a PLC controller, below the elastic polymer resin casting die head is an elastic and breathable casting mold forming roll group, and multiple pairs of longitudinal elastic and breathable film stretching roll groups are distributed laterally on one side of the elastic and breathable casting mold forming roll group. The forming roll group is laterally located on one side of the elastic breathable film stretching roll group at the end of the multiple pairs of elastic breathable film stretching roll groups, and the roll surface in the composite forming roll group is covered with circular grooves and convex points matched with concave and convex points.

Description

technical field [0001] The present invention relates to a method that can stretch the surface layer non-woven fabric and the bottom layer non-woven fabric or the non-woven fabric strip in the stretched state of the elastic breathable film without needing hot melt adhesive or stretching the non-woven fabric and the non-woven fabric strip. It is compounded on both sides or both sides of the elastic breathable film, and can form the required elastic breathable arc-shaped crepe composite non-woven fabric or crepe anti-side leakage non-woven fabric production line and production method with the rebound and reset 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 fabrics. Background technique [0002] CN202213263U, titled "a composite non-woven fabric", is composed of at least one layer of elastic non-woven fabric and at least one layer of elastic breathable film. The elastic breath...

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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