CN1190884A

CN1190884A - Sanitary Napkin

Info

Publication number: CN1190884A
Application number: CN96195625A
Authority: CN
Inventors: 长古川真纪
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1995-06-02
Filing date: 1996-05-09
Publication date: 1998-08-19
Anticipated expiration: 2016-05-09
Also published as: EG20715A; TW338314U; JP2974934B2; HUP9901429A2; KR19990022241A; NO975532L; KR100621371B1; CO4700393A1; JPH08322879A; TR199701485T1; AU712928B2; AR002164A1; AU5790996A; NO975532D0; CA2223082A1; EP0830120A1; MX9709260A; WO1996038110A1; ZA964103B; EP0830120A4

Abstract

The invention is a sanitary napkin (2) comprising a liquid-permeable top sheet (4), a liquid-impermeable bottom layer (6), between which is an absorbent core (8), a bottom layer (6) The shape of the sanitary napkin matches the shape of the sanitary napkin, and is basically long and narrow. The rear end part (16) of the napkin body is wider than the front part (20), and the absorbent core (8) is narrower than the front part of the bottom layer. On one side is a first adhesive layer (14), which is located in the area where the absorbent core is present, and on this same side of the bottom layer there is a second adhesive layer (28), which are located in the rear end portion of the bottom layer (6), distributed On both sides of the absorbent core (8) and on the part that does not contain the absorbent core (8), the first adhesive layer (14) fixes the sanitary napkin inside the underwear, and the second adhesive layer (28) keeps the bottom layer The rear part is fixed flat on the underwear.

Description

Sanitary towel

Affiliated field

The present invention relates to be worn on the sanitary towel that is used for absorb body fluids on the female body, particularly the rear end part sanitary towel wideer than fore-end.

Background of invention

Sanitary towel is a kind of articles for daily use that are used for absorb body fluids on the female body that are worn on.Sanitary towel commonly used is when wearing, and is generally identical to the width of the part of health rear end from the part of wearer's body front end.Since shape, constant width that this class sanitary towel is had, thus can carry out High-efficient Production to it, and help saving material.But this class sanitary towel can not prevent fully that body fluid from leaking out from the rear end part of towel body.Therefore, when the long period was used sanitary towel in nighttime sleep, how preventing that body fluid from leaking out from the health rear end part that couches became a significant problem.For addressing this problem, adopted the sanitary towel that will widen with wearer's body corresponding rear end part, its rear end part is wideer than fore-end.

The problem that this class sanitary towel exists is: its rear end part of widening can't be fixed on the underwear it firmly, and the side of rear end part in use can be dug, thus the leakage problems can't prevent to use for a long time the time.When each sanitary towel of packing, the rear end part of widening makes the fractional pack body become big, and the widened section of the single sanitary towel in the fractional pack need fold, and before packing fully, this widened section must keep folded state always, thereby its production is caused difficulty.

The object of the present invention is to provide sanitary towel that a kind of rear end part widens to prevent leakage of body fluids.

Another object of the present invention provides the sanitary towel that a kind of rear end part is widened, and it can be fixed safely, thereby can prevent leakage of body fluids effectively.

Another object of the present invention provides the sanitary towel that a kind of rear end part is widened, and its rear end part of widening can be stablized folding.

The invention summary

But sanitary towel of the present invention comprises the top layer of one deck transflective liquid, it is positioned at the one side of this sanitary towel, the promptly relative side with wearer's body, the another side of sanitary towel be can not transflective liquid bottom, it is relative with wearer's underwear, it between this is two-layer absorbent cores, the shape of this bottom and the profile of sanitary towel are complementary, substantially be that health front side from the wearer extends to its health rear side, wherein wide with wearer's body front side corresponding towel body front end with the corresponding towel body of wearer's body rear side rear end ratio, absorbent cores is narrower than the fore-end of bottom, side at bottom is first adhesive layer, and it is relative with underwear, is positioned at the zone that absorbent cores exists, this side at bottom also has second adhesive layer, they are relative with underwear, are positioned at the rear end part of bottom, are distributed in the both sides of absorbent cores and do not have on the part of absorbent cores, first adhesive layer makes sanitary towel be fixed on underwear inside, and second adhesive layer is fixed on the underwear rear end part tiling of bottom.

Detailed Description Of The Invention

Fig. 1 is the vertical view of sanitary towel in a kind of embodiment of the present invention.

Fig. 2 is the profile of the sanitary towel of Fig. 1 along the II-II line.

Fig. 3 is the vertical view that the sanitary towel of Fig. 1 is in folded state.

DESCRIPTION OF THE PREFERRED

The preferred embodiments of the invention are described with reference to the accompanying drawings.Shown in the accompanying drawing 1-3 is first kind of embodiment of the present invention.But the sanitary towel of label 2 expression generally comprises the top layer 4 of transflective liquid, bottom 6 and absorbent cores 8 that can not transflective liquid.Importantly, when top layer 4 directly contacted with wearer's skin, the body fluid of discharging in wearer's body would not make the wearer produce undue sense of discomfort.Top layer 4 is suitable for being made by the weaving or the non-woven fabrics of natural fiber or synthetic fibers, pore-forming thermoplasticity film of synthetic resin, porous synthetic resin foamed materials, netted synthetic resin foam, weblike heat plastic synthetic resin thin film, thermoplasticity synthetic resin gauze (scrim) etc.The important function of bottom 6 is to prevent that the body fluid that absorbent cores 8 absorbs from oozing out health and/or its medicated clothing that pollutes the wearer, and this bottom 6 is suitable for being made by thermoplasticity film of synthetic resin (for example, polyolefin film) that can not transflective liquid.The thin film that is specially adapted to bottom 6 comprises: thickness is low-density polyethylene film (" the MODEL XP 39385 " that commercially available Ethyl company (Visqueen Division) produces of 0.01-0.05 millimeter (particularly about 0.025 millimeter), with (the Cincinnati of Clopay company, Phio, U.S.A) " SOFLEXX1401 " of Chu Pining).Importantly absorbent cores 8 should be between top layer 4 and bottom 6, and its absorbs and holds by the body fluid of discharging in wearer's body and seeing through through top layer 4.Absorbent cores 8 is suitable for perhaps being suitable for these materials are used in combination by the cellulose filling cotton of the slurry of micropowder shredded paper for example (being called air felt), wrinkling (creped), molten blown polymer, through chemicosolidifying, modification or cross-linked cellulosic, absorbability synthetic resin foam, tissue layers, absorbability gel rubber material (can absorb body fluids and jelly).

In above-mentioned embodiment, top layer 4 is basic identical with the shape and size of bottom 6.Top layer 4 and bottom 6 are non-to be bonded together through heat fused along its whole edge discontinuously.Top layer 4 is represented by cross hatching and oblique line respectively in Fig. 2 with the heat fused part 10 of bottom 6.If desired, top layer 4 can combine through for example binding agent with bottom 6.As mentioned above, top layer 4 is identical with the shape of bottom 6, i.e. the shape of sanitary towel itself.Absorbent cores 8 is filled along the length direction (along Fig. 1 from top to bottom) of sanitary towel, and has roughly the same width (lateral length among Fig. 1) along the whole length of sanitary towel.Be used to make sanitary towel to be fixed on the outer surface that adhesive layer 3 on the underwear is positioned at bottom 6, basic corresponding with the position of absorbent cores 8.Adhesive layer is suitable for adopting by Century Adhesive Corp.(Columbus, Ohio, U.S.A) " the Century Adhesive A-305-IV " of Chu Pining.When adhesive layer 3 is positioned on the outer surface of bottom 6, preferably be coated with the paper that one deck is coated with polysiloxane on this adhesive layer, to prevent that this adhesive layer is stained with dirty before use.

Top layer 4 and bottom 6 are outstanding forward at vertical side of towel body the place ahead (upper end of Fig. 1), exceed the lateral edges 8a of absorbent cores, have certain lateral separation (upper end of Fig. 1).This ledge is equipped with the flap of sanitary towel 2.When using sanitary towel 2, flap 12 turns over the below to crotch portion of undergarment.If desired, can flap is fixed on the underwear by adhesive layer 14, this adhesive layer be positioned on the bottom side towards underwear.

Top layer 4 and bottom 6 are outstanding forward at vertical side of towel body rear (lower end of Fig. 1), exceed the lateral edges 8a of absorbent cores.This ledge is equipped with widened section 16, can prevent body fluid along the towel body vertically by its rear end part (lower end of Fig. 1) seepage.Corresponding with wearer's buttocks in the sanitary towel 2 is exactly this widened section 16 partly, thereby the leakage problems of these parts is improved.

There is tangible recess 18 between formed flap 12 that exceeds absorbent cores 8 lateral edges 8a and the widened section 16.When using sanitary towel 2, the flap 12 of sanitary towel 2 turns over to the below of wearer's underwear, and therefore in use, the side of 18 base 22 vertically is wide basic identical from front end 20 to recess, and from the base 22 of recess 18 vertically backward, the towel body broadens gradually.

As mentioned above, top layer 4 and bottom 6 are adhered to one another through heat fused at heat fused part 10 places.The heat fused process has guaranteed that top layer 4 and bottom 6 all cement through heat fused each other in the outside of front edge, back edge and the lateral edges of absorbent cores 8.Top layer 4 and bottom 6 also bond together (in Fig. 1 and Fig. 2, the heat fused part is represented by oblique line) on the base 24 of flap 12 and 26 places, base of widened section 16 through heat fused.Substantially guaranteed that in the heat fused process of heat fused part top layer 4 and bottom 6 cement each other along the part outside absorbent cores 8 edges.Therefore absorbent cores 8 is positioned at sanitary towel 2 inside.

As mentioned above, absorbent cores 8 is longitudinally basic and sanitary towel 2 is wide.This shape of absorbent cores 8 has reduced the part of downcutting from the towel body when production sanitary towel 2, thereby helps reducing production costs.In 8 liang of side-prominent flaps 12 of absorbent cores and widened section 16, all there is not absorbent cores 8.Do not have absorbent cores 8 to help making flap 12 to have enough compliances in the flap 12 and be easy to turn down.In the ledge of widened section 16, there is not absorbent cores 8 to reduce the hardness of the ledge of this widened section 16.For remedying the shortcoming that the hardness deficiency is brought, adhesive layer 28 also is equipped with at bottom 6 towards the side of wearer's underwear, just in time be positioned at the relevant position of widened section 16.When using sanitary towel 2, the ledge of widened section 16 is tiled in wearer's underwear the inside, is bonded in the inner surface of underwear by adhesive layer 28.The ledge that adhesive layer 28 can prevent widened section 16 is peeled off with wearer's Body contact the time.

Shown in Figure 3 is the state of sanitary towel when the ledge of flap 12 and widened section 16 is folding in Fig. 1 embodiment.As shown in Figure 3, the ledge of flap 12 and widened section 16 is folded in top layer 14 tops.Adhesive layer 14 surface coverage on the flap 12 have adherent layer, are coated with antitack agent on this adherent layer, as polysiloxanes etc., about two flaps be connected to each other by adherent layer 30.Also be coated with adherent layer 32 on the adhesive layer 28 on the ledge of widened section 16, be coated with antitack agent on this adherent layer, as polysiloxanes etc., about the ledge of two widened sections 16 be connected to each other by adherent layer 32.

Therefore, from the laterally projecting part of absorbent cores 8, promptly the ledge of flap 12 and widened section 16 is folded to the transverse center of absorbent cores 8 along the lateral edges 8a of absorbent cores 8, thereby makes the width of sanitary towel 2 less.The packing of sanitary towel 2 can be correspondingly littler.Flap 12 is connected by adherent layer respectively with the ledge of widened section 16, and it is folding therefore to need not the repressed ledge of flap 12 and widened section 16 that makes, thereby has simplified production line.

In the above-described embodiment, be equipped with on the towel body to be used to make towel body 2 to be fixed on adhesive layer 3 on the underwear, be used to prevent the adhesive layer 28 that the ledge of widened section 16 is peeled off from underwear, perhaps adhesive layer 3 and adhesive layer 28 can link together.In any case, in the ledge (wherein not containing absorbent cores) of widened section 16, should be equipped with adhesive layer on the bottom bottom surface.Can carry out various design variation within the scope of the invention.

In sanitary towel of the present invention, make the ledge of the widened section that is positioned at the sanitary towel rear end be fixed on underwear the inside by adhesive layer, thereby the ledge that prevents this widened section peel off from underwear, can prevent leakage of body fluids for a long time safely.Even, cause the ledge of this widened section to lack enough hardness, the danger that does not also exist the design widened section to peel off from underwear owing to do not contain absorbent cores in this design widened section of sanitary towel rear end.

Claims

1. A sanitary napkin comprising a liquid-permeable topsheet on one side of the sanitary napkin, that is, the side opposite the wearer's body, and a liquid-impermeable bottom sheet on the other side of the sanitary napkin, which is in contact with The wearer's underwear is facing each other, and between these two layers is the absorbent core,

The bottom layer is shaped to match the shape of the sanitary napkin, extending substantially from the front of the wearer's body to the back of the body, wherein the rear end of the napkin body corresponding to the back side of the wearer's body is compared to that corresponding to the front side of the wearer's body The front end of the towel body should be wide,

The absorbent core is narrower than the front part of the bottom layer,

a first adhesive layer on the side of the backsheet, which is opposite the undergarment, in the region where the absorbent core is present,

There is also a second adhesive layer on this side of the base layer, opposite the undergarment, in the rear portion of the base layer, distributed on both sides of the absorbent core and on the portion without the absorbent core,

The first adhesive layer fixes the sanitary napkin inside the underwear, and the second adhesive layer enables the protruding part of the rear end of the bottom layer to be flattened and fixed on the underwear.

2. The sanitary napkin of claim 1, wherein the width of the absorbent core is the same from the respective front side to the back side of the wearer's body.

3. The sanitary napkin of claim 2, wherein the widened rear end portion of the backsheet is folded along the side edges of the absorbent core toward the longitudinal centerline of the absorbent core.

4. The sanitary napkin of claim 3, wherein the widened rear end portion of the bottom layer is folded over the top layer and is covered with a side release layer on the surface of the adhesive layer.

5. The sanitary napkin of claim 4, wherein the front end portion of the backsheet corresponding to the front side of the wearer's body extends transversely, protrudes from both sides of the absorbent core, and forms wings which are turned down under the crotch of the undergarment.

6. The sanitary napkin of claim 5, wherein the wings are provided with an adhesive layer, the wings are folded toward the longitudinal centerline of the sanitary napkin along the side edges of the absorbent core, and the adhesive layer is coated with a release layer .