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Laminated nonwoven fabric and method for producing the same

A manufacturing method and technology of non-woven fabrics, applied in the direction of textiles and papermaking, layered products, non-woven fabrics, etc., can solve the problems of undocumented containing alkyl sulfates or alkyl sulfonates

Active Publication Date: 2019-03-12
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not described that the oil agent contains alkyl sulfate ester salts, alkyl sulfonate salts, etc.

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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  • Laminated nonwoven fabric and method for producing the same
  • Laminated nonwoven fabric and method for producing the same
  • Laminated nonwoven fabric and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 3

[0270] (1) Manufacture of fibers whose hydrophilicity is reduced by heat

[0271] The heat-fusible fibers of the first network shown in Table 1 below are concentric core-sheath composite fibers in which the core is polyethylene terephthalate and the sheath is polyethylene. The mass ratio of the core to the sheath is It was core: sheath = 50:50, the fineness was 2.4 dtex, and the fiber length was 51 mm. In addition, the latent crimping fibers of the second web shown in Table 1 are side-by-side composite fibers with polypropylene on one side and polyethylene on the other side, the volume ratio of each resin is 50:50, and the fineness is 2.3 dtex, the fiber length is 51mm. The heat shrinkage rate at the melting point+10 degreeC of the resin of a core was 9.5%.

[0272] The heat-fusible fibers of the first fiber layer were impregnated with a fiber treatment agent (oil agent) I having the following composition. After dipping, drying is carried out to obtain a heat-fusible core-s...

Embodiment 4 to 5

[0287] Concavo-convex laminated nonwoven fabrics of Examples 4 and 5 were obtained in the same manner as in Example 1 except that the contact angle of the second fiber layer was the contact angle shown in Table 1 below.

Embodiment 7 to 9

[0289] (2-2) Manufacture of non-woven fabrics

[0290] use Figure 8 The manufacturing apparatus 200 shown in the manufacturing has such as figure 2 and image 3 The concave-convex shape shown, and has the relationship (2) of the above-mentioned degree of hydrophilicity, the degree of hydrophilicity of the second part of the first fiber layer is higher than that of the first part of the first fiber layer (the degree of hydrophilicity of the first part of the first fiber layer (the second part of the first fiber layer) The contact angle of the part is smaller than the contact angle of the first part of the first fiber layer). The specific production method is as follows. First, in the step of lowering the degree of hydrophilicity, hot air is blown from the second surface side to the first web formed by the first web manufacturing unit to obtain a first nonwoven fabric (first fiber layer). Then, the second web formed by using the second web manufacturing unit is laminated o...

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Abstract

This laminated nonwoven fabric comprises a first fiber layer (10) and a second fiber layer (20) laminated thereon, and the first fiber layer (10) has multiple protruding sections (40) protruding from the second fiber layer (20) towards the first fiber layer (10). The protruding sections (40) are filled with the fiber that configures the first fiber layer (10). When the first fiber layer (10) is hypothetically divided in half in the thickness direction thereof and, of the two halved regions, the region farther from the second fiber layer (20) is called first fiber layer region number one (11) and the region closer to the second fiber layer (20) is called first fiber layer region number two (12), the hydrophilicities of the first fiber layer region number one (11) and the first fiber layer region number two (12) differ, and the hydrophilicity of the second fiber layer (20) is higher than the hydrophilicities of the first fiber layer region number one (11) and the first fiber layer region number two (12).

Description

technical field [0001] The invention relates to a laminated non-woven fabric and its manufacturing method. Background technique [0002] The present applicant has previously proposed a technique of heat-treating a core-sheath composite fiber with a hydrophilizing agent attached to its surface to change the degree of hydrophilicity of the fiber, and using this technique to produce a nonwoven fabric with a locally lowered degree of hydrophilicity. technology (see Patent Document 1). The technique of providing a hydrophilic degree gradient in the thickness direction of a nonwoven fabric is described not only in this document but also in Patent Documents 2 to 4, for example. [0003] Here, as a treatment agent for treating fibers, a treatment agent containing a silicone-based compound is known. To maintain the dryness of the surface of the nonwoven fabric after contact with the liquid, an oil agent containing a highly polymerized polyorganosiloxane is used. However, there is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B5/26D04H1/4374D06M13/224D06M13/262D06M13/292D06M15/643
CPCB32B5/26D04H1/4374D06M13/224D06M13/262D06M13/292D06M15/643
Inventor 安田宙夫蒲谷吉晃寒川裕太
Owner KAO CORP