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Unfolding type absorbent article and process for producing back sheet for absorbent article

An absorbent and article technology, which is applied in the field of unfolded absorbent articles and back sheets for absorbent articles, can solve the problems of hard back sheets, poor feeling, damage of non-woven sheets, etc., and achieves excellent touch and softness. Effect

Inactive Publication Date: 2009-04-15
DAIO PAPER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in a conventional diaper without a target tape, delamination between the hydrophobic sheet and the non-woven fabric sheet constituting the back sheet or damage to the non-woven fabric sheet may occur after the fastening tape is adhered and peeled off. a lot of
Also, in order to improve the situation, attempts have been made to increase the amount of hot melt adhesive used to bond the two, or to increase the amount of embossing to increase the bond strength, but if these means are used alone to completely prevent the layer No matter which method is used, the back sheet will become hard, the touch will be poor, and the feeling during use will be very poor.
[0010] On the other hand, if it is desired to make a simple compromise between increasing the amount of hot melt adhesive and increasing embossing, during manufacture, after bonding with hot melt adhesive, when it is provided to the embossing roller, there will also be problems. Manufacturing problems such as hot-melt adhesive being melted by the heat of the embossing roll, overflowing from the surface of the nonwoven fabric, and two sheets sticking to the embossing roll, causing work problems

Method used

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  • Unfolding type absorbent article and process for producing back sheet for absorbent article
  • Unfolding type absorbent article and process for producing back sheet for absorbent article
  • Unfolding type absorbent article and process for producing back sheet for absorbent article

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0095] figure 1 It is a developed view showing the fastening type disposable diaper Z of the present invention. This disposable diaper Z has: a liquid-permeable top sheet 11 positioned on the user's skin side; a liquid-impermeable back sheet 12 positioned on the outside of the product that does not allow liquid to permeate substantially; The absorber 13 is preferably hourglass-shaped and has a certain degree of rigidity, and the fastening tapes Y1 and Y2 for fastening are arranged on the left and right sides of the back side. In this form, the fastening tapes Y1, Y2 are formed using a hook surface material of a surface fastener, and an engaging portion X for engaging with an exposed portion of the hook surface material is formed on the ventral portion of the outer surface of the back sheet 12. superior.

[0096]The back sheet 12 is formed in a substantially square shape wider than the absorber 13, and the nonwoven fabric sheet 12B for exterior is laminated on the outer surfa...

no. 2 approach

[0115] figure 2 It is fastening type disposable diaper Z1 which concerns on 2nd Embodiment. Since the basic structure of this disposable diaper Z is the same as that of 1st Embodiment, the same code|symbol is used for the same part, and description is abbreviate|omitted.

[0116] In the second embodiment, a method called a so-called non-target tape is adopted, that is, a part of the outer surface of the back sheet 12 itself is appropriately embossed without attaching a matte material to the back sheet, thereby forming Joints X1, X2. Furthermore, on the back sheet 12, the intermediate nonwoven fabric sheet 12C is arranged between the exterior nonwoven fabric sheet 12B and the water-repellent sheet 12A within the range including the junction portions X1 and X2 formed therein.

[0117] The fastening belts Y1 and Y2 arranged on the left and right sides of the back side are made of the hook surface material (not shown) of the surface buckle except for the parts glued to the left...

no. 3 approach

[0133] Figure 5 and Fig. 6 show a third embodiment of the disposable diaper Z2. Figure 6 is along the Figure 5 A sectional view of the 2-2 line. The unfolded disposable diaper 10 includes: a back sheet 12 constituting the outer surface of the diaper; a liquid-permeable top sheet 30 disposed on the skin side; an absorber 50 interposed between the exterior sheet 12 and the top sheet 30; Fastening tapes Y1, Y2 on both ends of the back side of the back sheet 12. Fastening tape Y1, the fastening surface of Y2 is provided with hook surface material 130A, when wearing diaper, the fastening tape Y1 of the back side, the hook surface material 130A of Y2 is joined to the arbitrary place of the abdominal side surface of back sheet 12. .

[0134] (surface sheet)

[0135] The topsheet 30 is formed in a rectangle wider than the absorbent core 56, extends slightly outward from the sides of the absorbent core 56, and is fixed to the backsheet 12 with a hot melt adhesive or the like.

...

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Abstract

The object of the invention is to diminish the breakage of a back sheet caused by the application / stripping of a fixing tape. A back sheet (12) obtained by superposing a hydrophobic sheet (12A) made of a hydrophobic resin and nonwoven fabric sheets (12B and 12C) and press-bonding the sheets is used. In forming the sheet (12), the hydrophobic sheet (12A) and the nonwoven fabric sheets (12B and 12C) are superposed together with a hot-melt adhesive interposed between these, and the sheets are then press-bonded with heating. The bond strength between the hydrophobic sheet (12A) and the nonwoven fabric sheets (12B and 12C) is higher than the peel strength between the nonwoven fabric sheets (12B and 12C) and the male material (Y) applied thereto. The sheet (12) has a value determined by a KES flexural test of 0.05-0.50 gm<2> / cm.

Description

technical field [0001] The present invention relates to a method for producing an unfolded absorbent article and a backsheet for an absorbent article. Background technique [0002] Conventionally, there are known unfolded disposable diapers that include a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between the two sheets, and are arranged on the left and right sides of the back portion. The fastening belt on the upper part is fastened to the fastening part arranged on the predetermined position of the abdominal part to be worn. [0003] For the back sheet of such diapers, a hydrophobic sheet has been used alone for many years, but in order to improve the touch and feel during use, it has gradually begun to be laminated on the outer side of the hydrophobic sheet (the side that is on the outside when worn). The back sheet of the non-woven sheet. In addition, the back sheet of this laminated structure is produced by superimpos...

Claims

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Application Information

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IPC IPC(8): A61F13/49A61F13/56
Inventor 宇都宫毅深江晃礼鸟越启滋
Owner DAIO PAPER CORP
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