Air-through non-woven fabric and its application in diapers and diapers

Abstract

The invention relates to the field of disposable sanitary products, and provides a hot-blast air non-woven fabric. Non-hydrophilic low-melting-point dual-component fiber is selected as raw materials,partial region of the hot-blast air non-woven fabric is subjected to hydrophilic treatment to form a hydrophilic region, the hydrophilic region is hydrophilic, and vent holes are formed in the hydrophilic region; the region not subjected to hydrophilic treatment has water repellency; a water film for lowering water surface tension is formed on the surface of the non-woven fabric of the hydrophilicregion through hydrophilic treatment. The hot-blast air non-woven fabric has the advantages that the water absorbing performance is not affected while the fabric is kept dry and clean.

Description

technical field [0001] The invention relates to the field of nonwoven materials, in particular to a concave-convex nonwoven used as the surface layer of diapers. Background technique [0002] At present, the non-woven fabrics used in diapers are mainly short-fiber air-through non-woven fabrics, and the fibers used in the production of air-through non-woven fabrics are synthetic fibers, such as PE / PP, PE / PET, PP / PP, and CoPET / PET. It is non-hydrophilic. When producing these synthetic fibers, in order to increase the subsequent spinnability of the fibers, the fibers need to be added with spinning oil during the spinning process. The main function is to adjust the friction properties of chemical fibers and prevent or eliminate static electricity accumulation. , endow the fiber with properties such as smoothness, bundling, antistatic, softness, etc., and make the chemical fiber pass through the processes of spinning, stretching, texturing, spinning and weaving smoothly. Usually,...

AI Technical Summary

Problems solved by technology

[0002] At present, the non-woven fabrics used in diapers are mainly short-fiber air-through non-woven fabrics, and the fibers used in the production of air-through non-woven fabrics are synthetic fibers, such as PE / PP, PE / PET, PP / PP, and CoPET / PET. It is non-hydrophilic. When producing these synthetic fibers, in order to increase the subsequent spinnability of the fibers, the fibers need to be added with spinning oil during the spinning process. The main function is to adjust the friction properties of chemical fibers and prevent or eliminate static electricity accumulation. , endow the fiber with properties such as smoothness, bundling, antistatic, softness, etc., and make the chemical fiber pass through the processes of spinning, stretching, texturing, spinning and weaving smoothly. Usually, the spinning oil does not contain hydrophilic agent components, but if When fibers are used to produce non-woven fabrics for the top layer of diapers, the top layer of diapers needs to have the characteristics of fast absorption and fast penetration, so that urine can be quickly introduced into the absorbent core of the inner layer. The fibers used in the non-woven fabric of the first layer must be hydrophilic, so for non-hydrophilic PE / PP, PE / PET, PP / PP, CoPET / PET and other fibers, a certain proportion must be added to the original oil formulation Only in this way can synthetic fibers be given hydrophilicity, but this also increases the cost, and because these fibers have good hydrophilicity, it also brings too much humidity when making the surface layer. The problem is that users are particularly prone to red buttocks after use

Punching holes in the surface of the non-woven fabric is a method to increase the speed of urine absorption and infiltration. Through experiments, it is found that punching holes in the surface of the water-repellent non-woven fabric does not increase the speed of urine absorption and infiltration, because the water-repellent type The surface tension of water on the non-woven fabric surface is 70dyne / cm, and the surface tension of non-hydrophilic PE / PP, PE / PET, PP / PP, CoPET / PET fibers is generally 31-50dyne / cm, which can be seen Even if the water-repellent non-woven fabric has holes on the surface, water still cannot be absorbed from the pores and increase the infiltration rate.

Images