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Disposable diaper and method for producing stretchable sheet

A disposable, diaper technology, applied in medical science, clothing, underwear, etc., can solve problems such as adhesive falling off, difficulty in fixing the elongated state, and difficulty in joining

Active Publication Date: 2015-11-25
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, according to the method of sandwiching the linear elastic body between two sheets, the rigidity of the two sheets is generated, and there is a limit in improving the air permeability and softness of the absorbent article.
Here, for example, when reducing the basis weight (mass per unit area) of the two sheets used in order to improve air permeability or flexibility, the adhesive that arranges and fixes the linear elastic body falls off, making it difficult to fix the stretched sheet. With linear elastic, it becomes difficult to join two sheets stably

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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  • Disposable diaper and method for producing stretchable sheet
  • Disposable diaper and method for producing stretchable sheet
  • Disposable diaper and method for producing stretchable sheet

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0103] First, if Figure 8 As shown, the substrate sheet 2B sent out from a roller not shown is conveyed between a pair of toothed rollers 131 and 132, and the substrate sheet 2B is preliminarily subjected to uneven processing (preliminary processing step). In the first embodiment using the production apparatus 11A, the substrate sheet 2B is conveyed between the pair of grooved rollers 131 and 132 using a pair of grooved rollers 131 and 132 provided separately from the grooved roller 12, and the substrate sheet is 2B performs concavo-convex processing to facilitate the formation of the three pleats 3B included in the manufactured stretch sheet 1B. In detail, such as Figure 9 As shown, the substrate sheet 2B is conveyed between a pair of toothed rollers 131, 132, and the plurality of teeth 131a of the upper toothed roller 131 and the plurality of teeth 132a of the lower toothed roller 132 are used to transfer the substrate sheet 2B forms a plurality of longitudinal wrinkles ...

no. 3 approach

[0124] Figure 14 It is a figure which schematically shows 11 C of manufacturing apparatuses applied to the manufacturing method of the stretchable sheet 1B of 3rd Embodiment.

[0125] Differences from the manufacturing apparatus 11A of the manufacturing apparatus 11C of the third embodiment will be described. Points that are not particularly described are the same as the manufacturing apparatus 11A, and the description of the manufacturing apparatus 11A is appropriately used. also, Figure 14 ~ Figure 17 in, right with Figure 8 ~ Figure 10 The same parts are assigned the same reference numerals.

[0126] Such as Figure 14 , Figure 15 As shown, the manufacturing apparatus 11C has a grooved roll 18 provided with grooves 181 formed over the entire circumference of the peripheral surface at positions corresponding to the three pleats 3B, and the groove width of the grooves 181 can be increased or decreased. In addition, if Figure 14 As shown, the manufacturing apparatu...

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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Abstract

A nappy (1) of the invention is provided with a surface sheet (2), a reverse sheet (3), and a pair of fastening tapes (7) on both side parts (10s) at a back part (B) of an absorbent main body (10) comprising an absorbent body (4) positioned between said sheets (2, 3). Between the pair of fastening tapes (7) and between the surface sheet (2) and the reverse sheet (3), a gathered sheet (6) having a plurality of pleats (60) which extend in the width direction (X direction) is provided. The gathered sheet (6) comprises one sheet of non-woven fabric (61) and a plurality of elastic members (62), which are fixed in position in a state of width direction (X direction)-extension and are arranged intermittently in the longitudinal direction (Y direction) on the non-woven fabric (61). The gathered sheet (6) is formed by the contraction of the elastic members (62) and, viewed cross-sectionally, the elastic members (62) are positioned near to the thickness-direction tip end of the pleats (60).

Description

technical field [0001] The present invention relates to a method of manufacturing an unfolded disposable diaper and a stretchable sheet. Background technique [0002] Conventionally, a disposable diaper in which a so-called waist barrier sheet is arranged on the back side is known from the viewpoint of leakage prevention and fit to the wearer. [0003] For example, Patent Document 1 describes a disposable diaper having a waist barrier laid on the back waist portion from the edge of the waist opening to between the absorber and the top sheet. [0004] In addition, Patent Document 2 discloses a disposable diaper in which an elastic stretchable member is not covered with two sheets, a liquid-permeable top sheet and a liquid-impermeable back sheet, and the number of constituent sheets is reduced as much as possible. [0005] A stretchable sheet generally used in absorbent articles such as disposable diapers is formed by arranging a plurality of linear elastic bodies in a fixed ...

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 Patents(China)
IPC IPC(8): A61F13/15A61F13/49
CPCA61F13/49011A61F13/15593
Inventor 阿久津祐子佐藤信也
Owner KAO CORP