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Composite material and preparation process thereof

A composite material and preparation technology, applied in lamination devices, lamination, layered products, etc., can solve the problems of unfavorable liquid longitudinal diffusion and easy residual liquid, so as to avoid chemical pollution, good liquid absorption and permeability, and good The effect of the vertical diffusion function

Active Publication Date: 2012-07-11
FUJIAN HENGAN HLDG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this composite material is used as the surface layer material of disposable absorbent articles, the non-woven fabric is used as the upper layer, and the perforated film is the perforated film as the lower layer. It is easy to remain liquid during use, and the perforated film is used as the lower layer, which is not conducive to Longitudinal Diffusion of Liquid

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Composite material and preparation process thereof
  • Composite material and preparation process thereof
  • Composite material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 1-3 As shown, a kind of composite material, comprises the upper stratum perforated film 1 that contacts with user's skin and the lower non-woven fabric 2 that is positioned at the lower side of described upper perforated film, the film surface of perforated film 1 is evenly distributed with through The pores 4 are vacuum-adsorbed and punched, and the opening area of ​​a single pore 4 is about 0.04mm 2 , the opening density is 240 holes / cm 2 ;The basis weight of non-woven fabric 2 is 11g / m 2 . The upper layer of perforated film 1 and the lower layer of non-woven fabric 2 are composited together through the melting and pressing point 3. The melting and pressing point is in the shape of rice grains as shown in the figure. ), the area of ​​a single fusion bonding point 3 of the composite material is about 0.4mm 2 , the density of the pressing point is 20 / cm 2 ; The pores of the perforated film 1 in the composite material are less than those in other are...

Embodiment 2

[0030] Such as image 3 As shown, first, the hot-melt resin raw material is extruded through the casting machine 5 at high temperature. The hot-melt resin raw material includes at least one of HDPE, LDPE, LLDPE, and MDPE. Proportional mixing The casting film 6 in a high-temperature molten state flows out from the die of the casting machine 5, and then rolls and passes through the surface with a uniform hole area of ​​0.06mm 2 The drum-type perforated mesh cage 7 of the small mesh model is equipped with a vacuum nozzle inside the roller perforated mesh cage 7 to generate high-strength negative pressure from the inside to the small mesh model, forcing the cast film 6 to rupture and form a small mesh. The hole shape corresponding to the hole model, the hole density is 240 holes / cm 2 , to form a perforated film, and at the same time, the suction action causes the perforated film to be rapidly cooled to a solid state in an instant, and the thickness is measured, pulled, and flattene...

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Abstract

The invention discloses a composite material and a preparation process thereof. The composite material comprises an upper layer perforated film (1) which is contacted with the skin of a user and a lower layer non-woven fabric (2) which is positioned on the lower side of the upper layer perforated film (1), wherein slim holes (4) which are punched in a vacuum absorption mode are uniformly distributed on the surface of the perforated film (1); the upper layer perforated film (1) and the lower layer non-woven fabric (2) are compounded together through fusion laminating points (3); and 50 to 90 percent of slim holes at the fusion laminating points (3) of the perforated film (1) in the composite material are closed due to lamination. The preparation process comprises the following steps of: compounding the perforated film (1) subjected to the vacuum absorption with the non-woven fabric (2) through secondary perforation, namely punching the slim holes (4) in a cast film (6) through a roller type perforation mesh cage (7) by using a vacuum suction nozzle, then mechanically perforating the cast film through compression rollers (15 and 16), and compounding the perforated film (1) with the non-woven fabric (2) through the fusion laminating points so as to obtain the composite material which has a dry, comfortable and flexible surface and can be well diffused in the longitudinal direction.

Description

technical field [0001] The invention relates to a composite material, in particular to an improved composite material formed by compounding an upper perforated film and a lower nonwoven fabric through melting and bonding points. Background technique [0002] Generally, the composite material composed of perforated film and non-woven fabric is used in the surface material of disposable absorbent articles such as sanitary napkins, sanitary pads, paper diapers, and diapers. The composite material has rapid permeability and high permeability to liquids. absorbent. [0003] In the invention patent with the publication date of May 8, 2002 and the publication number CN1347802A, a production process of a composite sanitary fabric is disclosed: the PE film is heated, the heated PE film is subjected to vacuum suction, and then the non-woven The surface of the cloth is sprayed with hot-melt glue, and then the vacuum-absorbed PE film is combined with the sprayed non-woven fabric. This...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/24B32B5/24B32B37/06B32B37/10
Inventor 黄翠玉
Owner FUJIAN HENGAN HLDG CO LTD
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