JPS62104902A - Reinforcing net of absorbing body - 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 is based on an absorbent body made of cellulose 7 fluff pulp, which is applied to both sides of this absorbent body, extends a certain distance, and is bonded along the edge portion of the fluff pulp. The present invention relates to an absorbent article, such as a diaper, a menstrual belt, an incontinence protector or a bandage, comprising an outer cover surrounding an absorbent body formed of two layers.

One drawback of prior art diapers, for example, is that the absorbent material falls apart during use of the diaper, resulting in clumps of S7 Φ pulp. As a result, the diaper loses its shape, combs and crumples, causing discomfort, and at the same time, the scattered pulp makes the diaper more likely to leak. For these reasons, fluff pulp is often not used in diaper parts designed to absorb liquids. This is therefore particularly true in the generally narrowed crotch area of the diaper, where splitting is particularly likely to occur.

This integrity of the absorber is a problem that has not yet been satisfactorily resolved. Many attempts have been made to achieve absorbent cores that maintain their integrity during use.

For example, to increase the matte strength of fluff pulp absorbents, cellulose padding layers have traditionally been included in the absorbents. However, the drawback of this filling layer is 7 lacs.
Do not prevent the pulp from moving parallel to the cellulose filling layer. Not only that, but the filling layer of Cellulose has low resistance to moisture corrosion and easily cracks when it gets wet.
Stability function is lost. Furthermore, a major drawback of the cellulose filling layer is that this layer blocks the distribution of liquid in the depth direction and suppresses the rapid spread of liquid in this direction, resulting in leakage when the user dispenses a large amount of liquid in a short period of time. That's what it means.

pressure incontinence
This is common among people who suffer from θ).

Another suggestion is to treat the absorber with some kind of stabilizer, such as a hot melt spray.

However, such treatments not only increase production costs but also introduce undesirable properties in the absorber, such as reduced flexibility,
This will limit absorption capacity. Additionally, fluid permeability in the treated layer is reduced because the adhesive blocks the passages between the absorbent fibers.

U.S. Pat. No. 3,768,479 teaches a diaper reinforced with, for example, mesh to stabilize the shape of the absorbent body in wet as well as dry conditions. The intent is to provide the diaper with sufficient stiffness to prevent the wide front portion of the diaper from flexing and sliding backwards as the user moves. If this function were performed by a net or the like, the net would be stiff enough to cause discomfort when wearing the diaper. Another disadvantage of this type of reinforcement is that the net moves freely within the absorbent body, and when the net moves, the absorbent body tears, and if the situation is unfavorable, the outer jacket of the diaper can be cut open by the sharp edges of the net. This means that there are also.

In the case of the present invention, a reinforcing soft flexible network layer is disposed within the absorbent body, and this network layer extends beyond the absorbent body at least at the end portions of the absorbent body and between the layers contained within the jacket. The strength of the mat is significantly increased in the absorbent body of 7 rough pulp at the point where it is fixed at the joints.

The flexibility and conformability of the netting provides reinforcement without compromising plasticity and, therefore, wearing comfort for the user. Significant advantages also result from the fact that the diaper's liquid absorbency is not inhibited by the netting.

According to one embodiment of the invention, the reinforcing layer is arranged inside the absorbent body.

According to a second embodiment of the invention, the absorbent body consists of two or more individual layers with a reinforcing mesh arranged between the two layers.

According to a third embodiment of the invention, the reinforcing net is arranged within an absorbent body formed in a cohesive unit by air-laying of fluff pulp.

According to another embodiment of the invention, the reinforcing net consists of threads in a square pattern, preferably with a mesh of 5 to 20 rms.

According to yet another embodiment, the threads included in the reinforcing network are joined at their bonding points by thermal melting.

According to a further embodiment, the threads included in the net, at least the threads on the surface thereof, are made of a heat-fusible material and their bonding points are fused and integrated by melting.

The invention will now be described in detail with reference to some embodiments illustrated in the accompanying drawings.

Referring now to the figures, the diaper shown in FIGS. 1 and 2 consists of a liquid-impermeable bottom M1 and a liquid-permeable upper layer 2, both of which are integrally joined around an absorbent body 3.

The absorbent body 3 comprises an upper absorbent layer 4 of so-called fluff pulp, a mesh layer 5 overlying this layer and extending outwardly from the edge portion of the absorbent body 3, and an upper absorbent layer 6 of fluff pulp.

The net 5 is a soft polyester net fabric in which net-forming threads are connected by heat melting at their bonding points.The net 5 has the effect of stabilizing the absorbent core and reduces the risk of the absorbent core being torn and forming into lumps. This stability is achieved by the net absorbing mechanical stresses distributed over a large area of the absorbent body, and this absorbed mass also allows some of the absorbent fibers to pass through the net from one of the upper and lower absorbent layers. In order for the mesh 5 to achieve its stabilizing function, which is prevented from moving along the mesh by spreading out to the other side, the mesh must be firmly secured to the diaper.

The purpose of achieving this stabilizing function is achieved by extending the mesh beyond the edge part of the absorbent body and joining it to the edge part at the junction 7 between the liquid impervious N1 and the liquid permeable #2.

Appropriate mesh dimensions for the net 5 are from 5 to 20 figures. Reducing the mesh size makes the diaper stiffer, less comfortable, and may even impede fluid flow. In the case of a fine mesh net, if there is also an effect of the distance between the upper absorbent layer 4 and the lower absorbent layer 6, the fibers of this absorbent layer will penetrate the net and become entangled with each other in a hook shape. Therefore, it becomes impossible to prevent the absorbent layers from sliding against each other.

If the mesh of the net is too wide, the net will lose its stabilizing effect as it will not be able to sufficiently pick up and distribute the stress on the absorbent body or prevent the absorbed mass from moving within the absorbent body. Without being limited to the embodiments of the present invention, many variant implementations are possible within the scope of the appended claims. For example, the absorbent material can be of a different design than shown here.

The stabilizing mesh need not be centrally located inside the absorbent body, but may be located closer to its top or bottom surface, and may also be located outside the absorbent body or between the absorbent body and one or both of the outer layers. can be placed in between.

The mesh can also be made of other materials than those mentioned above. For example, the net can be made of threads of a thermofusible material and integrated by fusing the threads at their intersections.

Although the present invention has been described above only with respect to diapers, it should be understood that the principles of the present invention may also be applied to other absorbent articles such as menstrual belts, incontinence guards and bandages.

[Brief explanation of drawings]

FIG. 1 is a partly cutaway plan view of the diaper of the present invention, and FIG. 2 is a section I-III of FIG. 1! FIG. In the figure, numerals 1 and 2 are a liquid-impermeable bottom layer and a liquid-permeable upper layer, 3 is an absorbent body, 4 and 6 are an upper absorbent body and a lower absorbent body, and 5 is a reinforcing net.

Claims (1)

[Claims] 1. An absorbent body (3) of a cellulose flat bulb, which is sealed along the edge portions surrounding the absorbent body, arranged on both sides of the absorbent body, and extending a certain distance beyond the absorbent body (3). two layers (
1, 2) For example, a diaper comprising an outer cover formed from
In an absorbent article such as a menstrual belt, an incontinence guard or a bandage, a reinforcing soft and flexible mesh layer (5) is arranged on the absorbent body and the mesh layer is arranged at least in the end portions of the absorbent body. An absorbent article, characterized in that it extends beyond the absorbent body and is fixed to a joint between two layers (1, 2) included in the jacket. 2. The absorbent article according to claim 1, wherein the reinforcing layer (5) is arranged inside the absorbent body (3). 3. The absorbent body has two or more separate layers (4.
6) The absorbent article according to claim 2, wherein the reinforcing net (5) is arranged between two layers. 4. The reinforcing net (5) is arranged in an absorbent body (3) formed in the adhesive unit by means of a flat valve creating an air layer. Absorbent articles. 5. The reinforcing net (5) is made of threads made in a square pattern, and the square pattern is preferably 5 to 20 mm.
The absorbent article according to any one of the preceding claims, characterized in that it has a mesh size of . 6. The absorbent article according to claim 5, wherein the threads included in the reinforcing net (5) are bonded at their bonding points by thermal melting. 7. The absorbent according to claim 5, characterized in that at least the surface of the yarn included in the reinforcing net (5) is made of a thermoplastic material sealed by melting at the bonding point of the yarn. Goods.