JPS59228001A - Absorbing article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides disposable diapers, incontinence diapers, and postpartum A? The present invention relates to improvements in absorbent articles for treating body fluids.

The absorbent bodies in conventional articles of this type have poor shape retention, particularly when wetted by absorbing body fluids. Therefore, when the article absorbs body fluid and is subjected to the body pressure of the user, it undergoes significant compressive deformation and volume decreases, causing the absorbed body fluid to flow back to the surface of the article. Furthermore, the firm elasticity (cushioning properties, hereinafter the same) is significantly reduced due to moisture due to body fluids. Therefore, it not only causes discomfort to the user, but also causes so-called bedsores.

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional absorbent articles by maintaining almost the same shape retention and elasticity when dry and when wet, and absorbing the body pressure of the user. An object of the present invention is to provide an absorbent article that can reduce the backflow of absorbed body fluids to the surface and ooze out.

The gist of the present invention to achieve the above object is that a net-like structural member made of hydrophobic elastic foam is arranged to overlap an arbitrary position of an absorbent member to constitute a core body,
The present invention provides an absorbent article characterized in that the core is surrounded by an exterior sheet having at least a water permeable surface.

Further, an embodiment of the present invention will be described below by taking a disposable diaper, which is one of the absorbent articles shown in the drawings, as an example.

The diaper 1 includes a core body 4 made up of an absorbent member 2 and a net-like structural member 3, and an exterior sheet 7 that encloses the core body and consists of a water-permeable top sheet 5 and an impermeable back sheet 6. Member 2 is mainly fibrillated A? In order to improve absorbency as needed, water-insoluble polymers with high water absorption properties, such as those conventionally used in disposable diapers and sanitary napkins, may be mixed. Good too. Further, when using defibrated resin as the main material, it may be endowed if necessary.

The net-like structural member 3 is made of polyethylene, polystyrene,
A hydrophobic elastic foam such as polyurethane having a net-like (or porous, hereinafter the same) structure can be suitably used. Items having such a structure include, for example, one in which the sheet of the foam is punched as shown in FIG. 10, and one in which the linear objects of the foam are arranged in a lattice shape as shown in FIGS. 11 and 12. Examples include things. Such a structural member 3 has a void ratio (mesh or opening, the same shall apply hereinafter) of 30 to 80 inches, and a void area of 2
Preferably, it has ~100 fins 2 and a thickness of 2 to 20 gourds. The foaming ratio varies depending on the material, but is generally 10~
A value of 60 times is preferable, and particularly in the case of polyethylene, which is one of the most preferred materials, a value of 20 to 30 times is appropriate.

The net-like structural member 3 is placed on the absorbent member 2 so as to overlap with the absorbent member 2. As shown in FIGS. It may be arranged in each region or even in multiple layers, preferably in the upper layer region. Incidentally, when such a structural member 3 is disposed on the upper surface of the absorbent member 2 as shown in FIG. In view of the absorption function of the absorbent member 2, it is preferable to connect the top sheet 5 and the upper surface of the absorbent member 2 to the gap with a suitable water-conducting material.

In addition, the core body 4 having such a structure may be disposed inside the diaper 1 over the entire area as shown in FIG. 1, or partially as shown in FIGS. 7 to 9. , and when it is placed partially, it is preferable that the crotch or buttocks, which are most wetted by the user's body fluids, be located.

The top sheet 5 as the exterior sheet 7 can be made of a water-permeable flexible material such as a nonwoven fabric, and the back sheet 6 can be made of a water-impermeable flexible synthetic resin film or the like. However, the condition is not that it has a water-impermeable flexible back sheet 6, and in some cases, the entire core body 4 may be covered with a water-permeable flexible top sheet 5. This is because some articles are used by being placed on top of other articles having a water-impermeable member.

The diaper 1 shown in FIGS. 7 to 9 has a top sheet 5.
and the back sheet 6, on both sides of the core body 4, elastic members 8 for elastically bringing both sides of the diaper 1 into close contact with the chest circumference of the wearer, and a recessed part 9 on the outside thereof, It has a tape fastener 10 for tightening around the wearer's waist when worn.

Example 1 The entire upper layer of 800#/m" defibration/group was filled with a foaming ratio of 50 times, a porosity of 50 cm, and an opening area of 10 mm".
A net-like structural member made of foamed polyethylene with a thickness of 8 mm is arranged to constitute a core body, and the surface of the core body is covered with a 3-layer material made of 50% by weight of rayon fiber and 50% by weight of polyester fiber.
011/m2 nonwoven fabric, and the back side of the core was covered with a 25μ polyethylene film.
An absorbent structure of 100xlOO+s as shown in the figure was created.

In addition, as a comparative product, we created a product that was exactly the same as the actual product except that the net-like structural member was not arranged.

Water was dropped at 1 drop/sec from a position of 30 tm above the actual product and comparative product to absorb 6 times the amount of the absorbent material, F paper was placed on the top surface, and a pressure of 30 Fl/cm2 was applied for 3 minutes. When the water exudation rate was tested by measuring the amount absorbed by F paper, the tested product was 43.07cm and the comparative product was 80.4.
%Met. There was also no difference in absorption rate between the two. In addition, there was no significant difference in bulk or elasticity between before and after the test for the tested product, but the comparative product significantly decreased in bulk and became harder after the test.

According to the article of the present invention, since the core body 4 is constituted by the absorbent member 3 and the net-like structural member 4 made of hydrophobic elastic foam,
In addition to being able to achieve the intended purpose mentioned above,
When applied to disposable diapers, the crotch area does not twist due to the wearer's movements unlike conventional diapers. Therefore, the article of the present invention or the article using the same can be comfortably used by the user on a daily basis, and is extremely useful for practical use.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a disposable diaper showing an embodiment of the present invention, FIGS. 2 to 6 are cross-sectional views taken along line A-A in FIG. Nof the core body
Plane e showing each aspect arranged in a flat-type disposable diaper
i#Kgas*? 'h) 1"゛7'°2"1 Atonement 1・
... Diaper, 2... Absorbent member, 3... Net-like structural member, 4... Core body, 5... Top sheet, 6... Back sheet, 7... Exterior sheet

Claims (4)

[Claims] (1) A core body is constructed by arranging a net-like structural member made of hydrophobic elastic foam so as to overlap the absorbent member at any position;
An absorbent article characterized in that the core is surrounded by an exterior sheet having at least a water permeable surface. (2) The absorbent article according to claim 1, wherein the absorbent member is made of or consists of defibrated pulp. (3) The absorbent article according to claim 1, wherein the net-like structural member is arranged in an upper layer portion of the absorbent member. (4) The net-like structural member has a porosity of 30 to 80%,
One void area is 2~1001111", thickness is 2~2
The absorbent article according to claim 1, which has a foaming ratio of 10 to 60 times on day 0.