JPH0140511Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sanitary napkin characterized by a so-called lateral leakage prevention means for menstrual blood from the outer edge in the width direction.

In conventional sanitary napkins that have been put to practical use, a waterproof sheet is placed from the bottom surface of the absorbent body to the top surface of both outer sides in the width direction, and the internal laminate is covered with a water-permeable exterior sheet. Therefore, side leakage of menstrual blood absorbed into the napkin is prevented to a certain extent. However, even with such leakage prevention means, menstrual blood on the skin-contacting surface of the napkin, such as the water-permeable outer sheet and/or the upper surface of the absorbent body, may spread and leak laterally. Furthermore, while being worn, the napkin loses its shape and the waterproof sheets placed on both outer sides of the absorbent body come off from the outer sides, which may cause menstrual blood to leak sideways as well.

The purpose of the present invention is to provide a napkin having an effective means for preventing side leakage of menstrual blood as described above, and the present invention for achieving the purpose will be explained based on the illustrated embodiment as follows. It is as follows.

1 and 2 are external perspective views of the napkin, and FIGS. 3 and 4 are sectional views taken along the line X--X in FIGS. 1 and 2.

As shown in FIGS. 3 and 4, the napkin 1 comprises an absorbent body 2 made of pulverized pulp, crepe absorbent paper, water-insoluble water-absorbing and swelling polymer alone or in combination, and a lower surface of the absorbent body. A synthetic resin film, a laminate of the film and paper or nonwoven fabric, a waterproof sheet 3 made of paper or nonwoven fabric treated with a sizing agent, located on the upper surface of both outer sides in the width direction, and a foam molding located on the upper surface of the absorbent body. A water-permeable outer sheet 5 made of a non-woven fabric containing thermoplastic fibers, which covers these internal laminates and is heat-fused (press-bonded) at both ends in the longitudinal direction. There is. The hydrophobic net-like sheet 4 is foam-molded by adding a foaming agent to a hydrophobic resin such as polypropylene, polyethylene, vinyl chloride, etc., alone or in a mixture, and is net-like, thin and light like tissue, and manufactured by Mitsui Toatsu. It can be obtained from Kagaku Co., Ltd. under the trade name "Noinetsu".

In the napkin 1 as described above, the present invention provides an adhesive between the inner surface of the water-permeable exterior sheet 5 of the skin contacting surface 6 and the upper surface of the inner laminate at a portion inwardly away from both outer edges in the width direction of the napkin 1. , the napkin 1 is continuously joined in a linear manner in the longitudinal direction by any means of welding, and a joined part 7 is provided, and a hydrophobic net-like sheet 4 formed by foam molding is arranged on the upper surface of the absorbent body 2. It is characterized by certain things. When the adhesive is used, it is preferably hydrophobic;
In addition, in the case of welding, it goes without saying that the upper layer of the water-permeable exterior sheet 5 and/or the inner laminate must contain a thermoplastic material. As shown in FIG. 1, the linear joint portion 7 may extend to both longitudinal ends of the napkin 1, or
As shown in the figure, it may extend to a portion that does not reach both ends. In addition, as shown in FIG. 3, the linear joint 7 joins the inner surface of the water-permeable exterior sheet 5 and the upper surface of the internal laminate (hydrophobic net-like sheet 4 formed by foam molding); As shown in FIG. 4, the inner surface of the water-permeable exterior sheet 5 and the absorbent body 2
In some cases, the napkin 1 is joined to the waterproof sheet 3 located on the upper surface of both ends in the width direction of the napkin.
It is extremely effective in preventing leakage of menstrual blood because it does not separate from the absorbent body 2 during handling and use. In order to achieve the purpose of the present invention, the distance W between each outer edge of the napkin 1 in the width direction and each linear joint 7 is 3 to 20 mm, and the distance W between the two joint lines is 30 to 50 mm. preferable.

In the present invention having the above-described configuration, when the napkin 1 is worn normally and menstrual blood is excreted from it, the menstrual blood is absorbed into the interior from the water-permeable exterior sheet 5 between the linear joints 7. However, even if the menstrual blood spreads in the width direction on the outer sheet and between this and the upper surface of the internal laminate, it is blocked by both linear joints 7, so lateral leakage due to such diffusion is significantly reduced. It becomes less. Furthermore, since the inner surface of the water-permeable exterior sheet 5 and the upper surface of the internal laminate are linearly joined at the skin-contacting surface, it is possible to prevent the napkin 1 from losing its shape not only when handling it but also when wearing it. . In particular, since a hydrophobic net-like sheet 4 formed by foam molding is placed on the upper surface of the absorbent body 2, menstrual blood permeates in the thickness direction of the absorbent body 2 through the holes or holes of the net-like sheet. However, even if the absorbent body 2 attempts to flow in the plane direction, especially in the lateral direction, it is blocked by the large number of hydrophobic linear objects that make up the net-like sheet, and as a result, the water flowing up to the linear joint 7 is blocked. The amount of blood is reduced, and the side leakage prevention by the two linear joints 7 is made even more effective,
In addition, the prevention of the aforementioned deformation is made even more effective.
Furthermore, the net-like sheet 4 also serves to prevent menstrual blood absorbed into the absorbent body 2 from backflowing to the upper surface.

[Brief explanation of the drawing]

The drawings show embodiments of the napkin of the present invention; FIGS. 1 and 2 are external perspective views of the napkin viewed from the skin-contacting surface, and FIGS. It is a sectional view taken along the line XX in the figure. DESCRIPTION OF SYMBOLS 1... napkin, 2... absorber, 3... waterproof sheet, 4... hydrophobic net-like sheet, 5... water permeable exterior sheet, 6... skin contact surface, 7... joint part.

Claims (1)

[Claims for Utility Model Registration] (1) A sanitary napkin consists of an absorbent body, a waterproof sheet located at least on the lower surface of the absorbent body, and a water-permeable sheet containing heat-fusible fibers that covers these internal laminates, A line is formed in the longitudinal direction of the napkin by either adhesive or welding to connect the inner surface of the water-permeable exterior sheet of the skin-contacting surface and the upper surface of the inner laminate at a portion appropriately spaced inward from both outer edges of the napkin. 1. The napkin characterized in that a hydrophobic net-like sheet formed by foaming is disposed on the upper surface of the absorbent body. (2) A waterproof sheet is located from the bottom surface of the absorbent body to the top surface of both outer sides in the width direction, and the top surface of the waterproof sheet and the bottom surface of the water-permeable exterior sheet are located on the top surface of both outside sides of the absorbent body in the width direction. A sanitary napkin according to claim 1 of the utility model registration claim, which is joined with the above. (3) The distance between each outer edge of the napkin in the width direction and each joining line is 3 to 20 mm, and the distance between both joining lines is 30 mm.
The sanitary napkin according to claim 1, which has a diameter of 50 mm.