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Absorbent products

A technology for absorbent products and absorbent cores, applied in the field of absorbent products, can solve problems such as stuffy heat and water vapor generation

Inactive Publication Date: 2004-08-04
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these related technologies ignore the fact that the discharged body fluid cannot be fixed between paper or pulp fibers, and as a result, if the body fluid is discharged in a large amount, water vapor will be generated and a stuffy feeling will be caused.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0085] 1) Preparation of superabsorbent polymer A

[0086] In a 500 ml four-neck round bottom flask equipped with a stirrer, a reflux condenser, a dropping funnel and a nitrogen tube, add 230 ml of cyclohexane and 1.4 g of sorbitan monostearate (Leodor SPS-12, Kao Corporation product), and stirred to obtain a homogeneous solution. Separately in an Erlenmeyer flask, 30 g of acrylic acid monomer was neutralized with 13.4 g of sodium hydroxide dissolved in 39 g of water to prepare a monomer aqueous solution having a monomer concentration of 45% (water content: 55%).

[0087] 0.1 g of potassium persulfate was dissolved in the aqueous monomer solution. Under a nitrogen atmosphere, this monomer solution was dropped into a four-necked round bottom flask containing cyclohexane or the like. The mixture was heated to 70-75°C to initiate polymerization. The reaction system was refluxed with simultaneous isotropic dehydration to adjust the water content of the polymer (as a suspension ...

Embodiment 1-4

[0134] Embodiment 1-4 and comparative example 1'-4'

[0135] Absorbent articles 1-4 and comparative absorbent articles 1'-4' according to the first aspect of the invention were prepared using absorbent members A-H.

[0136] a) Preparation of absorbent article 1

[0137] The porous nonwoven fabric used as the surface layer 2 is made of a basis weight of 25 g / m 2 The suction heat-bonded nonwoven fabric composed of PET / PE core / sheath composite fibers. The opening area ratio of the holes is 10%, and the diameter of each hole is 0.8mm. Stack it on absorbent piece A, it is in the figure 1 and is shown in FIG. 2 as absorbent element 4 . The layer is passed through with as in figure 1 A heated roll, shown in pattern 12, produces a heat-sealed monolithic structure. Set the basis weight to 20g / m 2 A double spunbond nonwoven fabric made of PET / PE core / sheath composite fibers is stacked on each side of the surface layer 2 as a leak-proof layer 6, and heat-sealed by a hot roller (he...

Embodiment 5

[0154] Absorbent articles according to the first and second aspects of the present invention, which are referred to as absorbent article 5, were prepared in the same manner as absorbent article 1, except that the porous moisture-permeable backsheet was used instead of the moisture-impermeable backsheet. The above-mentioned porous moisture-permeable bottom layer is prepared by forming a melt mixture containing 50% calcium carbonate and 50% polyethylene into a sheet and biaxially stretching the sheet. The moisture vapor transmission rate of this porous bottom layer is 1.7g (100cm 2 .hr).

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Abstract

An absorbent article comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent layer is disclosed. The absorbent layer comprises a superabsorbent polymer and hydrophilic fiber or foam that does not swell with water or hydrophilic fiber or foam that has a water retention of 0.7 g / g or less when it is swollen with water and then dewatered by centrifugation. The absorbent article has a physiological saline fixing ratio of 90% or more when it absorbs 10 g of physiological saline and, after 5 minutes, is dewatered by centrifugation.

Description

technical field [0001] The present invention relates to an absorbent article such as: sanitary napkin, disposable diaper, adult incontinence pad, panty liner. More specifically, it relates to an absorbent article which has excellent absorbency and is extremely comfortable to wear without feeling stuffy. Background technique [0002] There have been proposed absorbent articles which prevent internal humidity from increasing and stuffiness when worn. For example, Japanese Patent Laid-Open Nos. 6-218007 and 7-132126 disclose absorbent articles. They consist of an absorbent assembly containing dried pulp, a mass of superabsorbent polymers, such as silica gel or lithium chloride, and a breathable backsheet. [0003] Japanese Patent Publication No. 10-508521 (W096 / 14037) discloses an absorbent article using a combination of two breathable layers as a backsheet to prevent liquid leakage from the backsheet. [0004] However, these related technologies ignore the fact that the dis...

Claims

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Application Information

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IPC IPC(8): A61F13/15
CPCA61F13/53427A61F2013/530729A61F2013/530751A61F2013/530489A61F2013/530802
Inventor 滨岛美次木村真由美丰岛泰生中西稔
Owner KAO CORP