Method for producing composite punched membrane

Abstract

A method for producing a composite perforated film, characterized in that: hot-melt resin particles are used as the raw material of the perforated film for the hydrophilic or hydrophobic layer, and non-woven fabric is used as the fabric for the hydrophilic layer, and the production is carried out by the following method: heat The molten resin particles are extruded through the casting machine at high temperature, and the cast film in a high-temperature molten state flows out from the T-shaped die of the casting machine; at the same time, the non-woven fabric is fed from the discharge roller through the guide roller; then let it melt at high temperature The cast film in the state is laminated with the non-woven fabric sent, and rolls through a roller-shaped cage with uniform mesh on the surface. At this time, the non-woven fabric is bonded to the cast On the membrane, at the same time, the vacuum nozzle installed inside the drum generates high-intensity negative pressure from the inner side to the mesh, forcing the composite membrane to rupture and form a hole shape corresponding to the mesh. At the same time, the suction makes the composite membrane It is rapidly cooled to a solid state in an instant, and finally sent to the post-processing equipment through the guide roller, and finally wound into a finished product. The invention has the advantages of simple process, high efficiency, good quality and low cost, and at the same time solves the discomfort problems such as allergies and itching caused by the use of hot melt adhesives in the past.

Description

technical field [0001] The invention relates to a composite perforated film (also known as "composite sanitary fabric") used in sanitary products such as women's sanitary napkins, sanitary pads, adult trousers, and baby diapers. The porous film is generally composed of a perforated film layer and a non-woven hygroscopic layer. In particular, it relates to a production method of the composite perforated film. Background technique [0002] Composite perforated film (also known as "sanitary fabric") is used as the basic fabric of sanitary products such as women's sanitary napkins, sanitary pads, adult trousers, baby diapers, etc. It is widely used in absorbent articles such as liners. This fabric is generally composed of a perforated film layer and a non-woven moisture-absorbing layer, which has rapid permeability and absorption of liquids. A Chinese patent disclosed a patent application titled "The Production Process and Products of Composite Sanitary Fabrics" on May 8, 200...

AI Technical Summary

Problems solved by technology

But this production method still has the following deficiencies: 1, due to the existence of the hot melt adhesive, under the action of moisture and body temperature, it undergoes chemical changes, causing discomfort such as allergies and itching on the human skin; 2, the raw materials of the method One uses PE film and gas heating. From the perspective of the whole production process, the first step needs to produce PE film, and the second step uses this PE film to produce composite sanitary fabrics. Among them, the production of PE film and composite sanitary fabrics Fabric production needs to be heated twice, which is not conducive to energy saving, but also increases the production process, thus complicating the entire production process, with low efficiency and high cost, which is not conducive to large-scale industrial production

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