CN1006195B - Napkin construction with laminate wripper - Google Patents

Abstract

The present invention provides a sanitary belt. The sanitary belt solves the problem that stains penetrate through the body facing surface of the sanitary belt to be spread. The sanitary belt is convenient to manufacture and process. The sanitary belt is composed of a pad lining which comprises coverings. The coverings cover the clothes facing surface of a lining, the longitudinal lateral surface of the lining and the surrounding part of the body facing surface of the lining. The coverings are composed of body liquid-impermeable paper which is stacked onto cellulose paper. The cellulose paper is wider than the liquid-impermeable paper. The width of the cellulose paper is sufficient for covering the clothes facing surface and the longitudinal lateral surface and the surrounding part of the body facing surface of the lining, but is not insufficient for covering the main center part of the body facing surface of the lining.

Description

The sanitary belt structure that the laminated cover thing is arranged

The present invention relates to a kind of sanitary pad, particularly have the not structure of the sanitary pad of saturating body fluid layer, for the ease of making, this layer laminate is to fibrous layer.

Sanitary pad is made up of a pad or core usually, and they are to be made of one or more layers water wetted material, for example, and wood pulp paper, staple fibre, Cotton Gossypii or some synthesis hydrophilic materials, for example hydrophilic foam material.Pad is normally orthogonal, has one and faces toward interarea and main reverse side facing to the interior fork branch of user underwear that human body is worn.Get wet in order to protect underwear not stain, the clothes veneer and at least the vertical lateral parts between the interarea covered by saturating body fluid paper.This class paper is made up of polyolefin film usually, and polyethylene is alternative material, and it meets the requirements very much, and inexpensive, is easy to get.Pad and not saturating body fluid paper cover with outer usually.

Recently, the new product trend provides outer cover for this product, is not easy after this cover layer uses to occur staiing.It is found that, by hydrophobic material, for example the cover layer formed of hydrophobic fiber fabric or apertured film will make body fluid be easy to enter the absorption pad, but can not make body fluid laterally along the absorption on tectal surface, so the appearance that cover layer is stain is limited on the very little liquid deposition area.

Unfortunately, it is found that, in some sanitary belt structures,, wish that the characteristic of not staiing is still destroyed although use newer cladding material.In particular, in some sanitary belt structures that adopt, not saturating body fluid layer is covered fibrous layer, on toilet paper.Adopt this laminated construction, at first be convenient to not the processing of saturating body fluid material, it is normally slick, the thin film of electrostatic charge easily takes place, so when making at a high speed, suitable arrangement pad is difficult.Therefore, actual make such product, of adsorbing material who at first builds up the impermeable material that has continuous supply is rectangular, then the rectangular segmentation of lamination or be cut into one pad.If without any process equipment, not mobile impermeable material and to cut lamination rectangular be impossible basically.

Therefore, the solution of this processing problems is by Canadian Patent No.805, and (people such as Angelo P.Ruffo proposes in 1969.2.4) 351 " sanitary belt structures ".According to this Canadian Patent, impermeable stratum covers basically than on the wide toilet paper layer of impermeable stratum, so the impermeable stratum limit is stretched out on vertical limit of toilet paper layer.The whole pad of this laminated cover then reaches impermeable stratum and covers the vertical lateral part of the clothes veneer and the pad of pad.Wide toilet paper stretches out the limit of impermeable stratum and covers whole health veneer of pad.The toilet paper additional width is to overlap on the health veneer of pad with the vertical peripheral part that allows toilet paper layer, and simultaneously, the covering of the lamination of saturating body fluid is fixed on cutting and other processing position having not securely.

U.S. Patent No. 3,230, similar solution of 955 suggestions, also adopt a kind of not saturating body fluid paper that covers toilet paper as mentioned above, different is that toilet paper and craft paper all enlarge, by means of " bridge joint " toilet paper fixed product of the whole health veneers that cover sanitary pad.

Though these two kinds of methods are effectively to reducing the difficulty of processing the sanitary pad with impermeable stratum, there is not the cover layer that stains relatively owing to make great efforts production recently, they have a common shortcoming to merit attention especially.In particular, Canadian Patent 805,351 is disclosed, cover the tectal extension of health veneer of sanitary pad or as U.S. Patent No. 3,230,955 is disclosed, cover the bridge layer of the health veneer of sanitary pad, all be by strong absorbent material, constitute that this is at first because consider cost as toilet paper.When these materials were got wet by body fluid, they trended towards running transverse through whole health veneer adsorptive liquids of sanitary pad.As a result, the covering although development does not recently absorb water, the layer under this cover layer is stain on a wide area, and it is visible that this wide stain sees through cover layer, even makes liquid see through the cover layer reverse side, and this has just destroyed new tectal purpose.Consider the problems referred to above, need a kind of structure of sanitary pad, be convenient to the arrangement of impermeable stratum and firm during fabrication, but do not destroy the cleaning and the drying of desirable sanitary pad after using.

The invention discloses a kind of sanitary belt structure, it eliminates the character with the contamiaative transmission of pre-structure.The quick arrangement of impermeable stratum and firm when also being convenient to make.

In particular, a kind of covering of configuration in sanitary pad, this sanitary pad has vertical lateral clothes veneer by the absorption pad of a prolongation with health veneer and one and forms.Covering provides the clothes veneer that covers pad, vertically vertical peripheral part of side and health veneer.Covering is made up of not saturating body fluid paper that is layered on the fibrous paper, and fibrous paper is wideer than not saturating body fluid paper, makes fibrous paper stretch out not saturating body fluid paper.According to the present invention, not saturating body fluid paper width is enough to cover clothes veneer and vertical at least lateral part of pad.The fibrous paper width is enough to cover the clothes veneer of pad, vertical vertical peripheral part of side and health veneer, but this width is not enough to cover the center major part of the health veneer of pad.

Therefore the covering of sanitary pad of the present invention does not provide any covering water accepting layer to the main core of pad health veneer.When using together, cover this face of pad without any water accepting layer, and only produce a small amount of the contamination with the relative cover layer that do not absorb water.Though it should be noted that main purpose in this respect is to utilize the tectal structure that do not absorb water relatively that has of the present invention, even with a suction cover layer when using, the structure of this sanitary pad will be improved presenting of contamination significantly.

Surprising is it is found that on the contrary with prior art, in order to make required product fast, does not need to provide fibrolaminar overlapping or " bridge layer ".Unexpectedly be, fibrous layer only reaches the sub-fraction of pad health veneer, promptly at vertical peripheral part of this health veneer, produces enough frictional engagement the laminated cover thing is fixed.Best, adopt the laminated cover thing in the product of the covering fibrous face have the pad opposite on each face that it engages to strengthen frictional engagement, the place of joint is promptly at the clothes veneer of this product, vertically vertical peripheral part of side and health veneer.

Fig. 1 is the perspective view of sanitary pad of the present invention, with cancellation internal structure is shown partly among the figure;

Fig. 2 is the drawing in side sectional elevation by Fig. 1 sanitary pad of line 2-2;

Fig. 3 is the profilograph by Fig. 1 sanitary pad of line 3-3;

Fig. 4 is the perspective view of prior art sanitary pad, with cancellation internal structure is shown partly among the figure;

Fig. 5 is the drawing in side sectional elevation of Fig. 4 sanitary pad;

Fig. 6 is the profilograph of Fig. 4 sanitary pad; With

Fig. 7 is the obducent perspective view that adopts in Fig. 1 sanitary pad.

Accompanying drawing 1-3 illustrates with perspective view and profile and implements sanitary pad 10 of the present invention.This sanitary pad 10 is made up of the common average pad 12 with two main faces, and wherein one side is a health veneer 14, and towards the health of user, another side is a clothes veneer 16, towards the underwear of user.It between the face 14 and 16 vertical side 18.

Pad 12 can be made up of loose bonded absorbent material, and fiber for example is as wood pulp paper, regenerated fiber, cotton fiber; Modified fibre other chemistry or physics; Other natural and synthetic polymerization adsorbing material, for example water absorbency plastic foam (as the suction polyurethane foam plastics).These materials can use separately or be used in combination, and can make various physical forms, for example thin paper are pressed into lamination or molded foam structure or the like.

Saturating menstrual fluid cover layer 20 is sealed the health veneer 14 of pad 12, vertically side 18 and clothes veneer 16.Usually this cover layer is individual a rectangular paper, and its width is enough to around pad 12, and it is overlapping that it has longitudinal edge 21, sealed together on the clothes veneer of sanitary pad.Cover layer 20 can be to make body fluid see through any braiding or the non-woven seepy material on its surface, and this cover layer is known in present technique, is made up of fibrous material usually, for example Cotton Gossypii or staple fibre.Recently, towards provide the cleaning of not staiing with exsiccant outward appearance and effort, this cover layer is basically by wet, the hydrophobic material that does not absorb water is formed, for example polyester or polyolefine fiber, for example polypropylene fibre.In addition, adopt these materials, it is permeable through liquid that for example polyethylene or polyacrylic thin film, this thin film have aperture to pass to make.

According to the present invention, being clipped between cover layer 20 and the pad 12 is covering 22, preferred example as seen in Figure 7, and it is made up of the lamination and the liquid-tight paper 26 of a fibrous paper 24.Liquid-tight paper 26 is normally orthogonal, hinders the body fluid that pad 12 absorbs and keeps by it, in order to avoid reach the sanitary pad outer surface part of contact user clothes.Therefore, liquid-tight paper 26 can be by any thin, flexible not forming through the material of liquid thoroughly, and polymer thin film for example is as polyethylene, polypropylene or cellophane.Film thickness is about 0.0025-0.075mm(0.1 to 3.0 mils), preferably thickness is about the 0.0050-0.025mm(0.3-1.0 mil).

Fibrous layer 24 can be made up of fibrous material any braiding or non-woven, and this fiber has enough intensity and according to complete effect of the present invention.For economic aim, adopt toilet paper, it not only cheaply but also easily rolling obtain, so be incorporated into easily in the product of the present invention.This toilet paper basis weight is the about 30 gram/rice of 10- ²Better, preferably be about 13-26 gram/rice ²

Preferred example as shown in Figure 7, fibrous layer 24 and liquid-tight layer 26 form covering 22 with face-to-face combination.This is in conjunction with by using binding agent to finish, the emulsion binder that place for example dry back or be heated to uniform temperature viscosity and be activated, the hot-melt adhesive of cooling and placement rapidly then.On the other hand, Canadian Patent 805,351(are the list of references of this paper) said method can adopt, this liquid-tight paper is a kind of thermal softening synthetic plastic, for example polyethylene softens plastic foil bondable fibers layer by intermediate heat, and this film softening point is lower than liquid-tight paper.

According to the present invention, size W among liquid-tight paper 26(Fig. 7) width is enough to the part that makes paper 26 cover the clothes veneer 16 of pads 12 and cover vertical side 18 of pad 12 at least." width of liquid-tight paper 26 " means the distance on 34 on extend longitudinally limit, and when the position of covering 22 at pad 12, this limit usually and vertical parallel sided of pad 12.

In addition, the width of fibrous paper 24 (size W among Fig. 7) is enough to make paper 26 to cover the clothes veneer 16 of pad 12, vertical peripheral part of the vertical side 18 of pad 12 and the health veneer of pad 10.But the width W deficiency is so that fibrous paper covers the center major part of the health veneer of pad 12.We know that " width of fibrous paper 24 " means the distance between the extend longitudinally limit 32, and when the position of covering 22 at pad 12, this limit usually and vertical parallel sided of pad 12.

With reference to figure 1-3, covering is shown in the position of pad 12.Can see, by combination of the present invention, clothes veneer 16 and part that liquid-tight paper 26 covers pad 12 reach on vertical side 18 of pad 12, and fibrous paper 24 covers the clothes veneer 16 of pad 12, vertically peripheral part 36 of side 18 and extend longitudinally health veneer 14 thereof.The center major part 38 of the health veneer of pad 12 does not have fibrous paper 24." center major part " do not have paper 24 mean pad at least the health veneer 30% do not have fibrous paper.40% of the health veneer of pad 12 be not to be capped at least preferably.In order to process, it is 85% better that the center major part of exposure is not more than, and preferably is not more than 60%.For example, the wide of pad 12 is the 6.0325cm(2.375 inch) wide, on another vertical side, have only the 1.524cm(0.6 inch) covered by fibrous paper 24.Be preferably in the another side approximately less than the 2.032cm(0.8 inch) be capped.

As Figure 1-3, consider the contamination mode, staying the value that center major part 38 do not cover is clearly.Area 28 is shown in the stain on the pad 12, and its basic upper limit is at the core of the outer surface of sanitary pad.When not having the intermediate layer of water sucting medium, cover layer 20 and pad 12, the liquid that sees through the cover layer 20 on the area 28 directly is drawn onto pad, leaves health veneer 14.So a speckle on cover layer 20, only occurs.

This is opposite with situation about existing in the sanitary pad 40 of the prior art shown in Fig. 4-6.About this, sanitary pad 40 is similar to the sanitary pad 10 of Fig. 1-3 in many aspects.So sanitary pad 40 comprises a pad 42, this pad 42 has health veneer 44, clothes veneer 46 and vertical side 48, and saturating menstrual fluid cover layer 50 is sealed pad and is overlapped on its clothes veneer.

Being clipped between cover layer 50 and the pad 42 is covering 52, and it also is made up of the lamination of fibrous paper 54 and a lamination of liquid-tight paper 56.When paper 56 is identical with paper 26 width of sanitary pad 10 basically, it is also noted that according to the prior art practice, paper 54 width are enough to cover fully the health veneer of pad 42, in fact, width enough makes the longitudinal edge 62 of paper 54 overlap on the health veneer.

So the liquid that is deposited on the sanitary pad center will pass through cover layer 50 rapidly.But in this point, this liquid will run into strong absorptive fibrous paper 54.As a result, liquid sucks absorption pad 42 and leaves before the health veneer 44, and liquid will laterally be transmitted by the health veneer of the sanitary pad of close water-absorption fiber paper 54.To run through cover layer 50 as a wide stain 58 be tangible to the liquid of San Buing like this.

Therefore can see, the guidance below the present invention and providing not by the center major part of the health veneer of the pad 12 of fiber-covered, the result produces little stain.Surprisingly fail to make fully fibrous paper to reach on whole health veneers, do not cause thereupon and settle when producing and stablize obducent difficulty.Find that now the frictional engagement between fibrous paper and the pad on the area of vertical peripheral part of pad health veneer is enough to finish at a high speed to be made, and without any arranging or keep the difficulty of covering at correct position.When band fibrous paper part that contacts the pad face by arrangement and pad covering raising frictional engagement, especially like this.

The following examples can illustrate advantage of the present invention.

Embodiment

Preparation has a series of sanitary pads of structure shown in Fig. 1-3.Preparation has the second series sanitary pad of the prior art sanitary belt structure shown in Fig. 4-6.Two series sanitary band total lengths all are the 24.69cm(9.72 inch), width is the 9.53cm(3.75 inch), thickness is the 1.75cm(0.69 inch).Pad total length 19.51cm(7.68 inch) and by wood pulp paper form.It is the 18.098cm(7.125 inch that each sanitary pad is all used width) outer cover seal, and overlap on the clothes veneer of sanitary pad.This cover layer is made of non-woven dacron fabric.A series of health of prior art structure have the layer of polyethylene that is clipped between pad and the cover layer and the toilet paper lamination of absorption.The width 17.78cm(7 inch of toilet paper), it crosses the health veneer of sanitary pad and is overlapping.A series of health of the embodiment of the invention have the similar layer of polyethylene between cover layer and the pad and the lamination of toilet paper of being clipped in; But the width of toilet paper is the 11.43cm(4.5 inch), it only extends to peripheral part of the health veneer of pad.

Test each sanitary pad to determine visible stain area.According to this test, each sanitary pad be placed on one flat, on the clean water plane.One is of a size of 25.4 * 12.7 * 1.27cm(10 inch * 5 inch * 0.5 inch) thick, contain an oval aperture (major diameter is the 3.81cm(1.5 inch) that is positioned at the center, minor diameter is the 1.91cm(0.75 inch) the chemical glass plate be put on the sanitary pad, the longitudinal direction of aperture and the longitudinal direction of pad and pad center and aperture center are consistent.Graduated cylinder is filled the artificial menses liquid that the footpath of various volumes is selected, and this liquid is to have with ion concentration, viscosity and capillary mixture like the menstruation liquid phase.This liquid also contains the pigment of simulating menstrual fluid.Then artificial menses liquid is poured into aperture, keep aperture to be filled, do not absorb in the sanitary pad and do not allow to overflow up to whole these menstrual fluids.Remove glass plate then, stayed the sanitary pad balance one minute.A 0.025mm(1 mil) thick clean transparent, be of a size of 25.4cm * 12.7cm(10 inch * 5 inch) plastic sheeting be put on the sanitary pad, the profile of visible stain retouched on thin film with the end of a thread pen.Measure the area of vestige then with planimeter Keuffel and the manufacturing of Esser company and be recommended as " proofread and correct and decide the plate planimeter " by them.The result of this test lists the table I in, is called " being full of toilet paper " hurdle and is the stain area of the measured a series of sanitary pads of prior art in table, is called " part toilet paper " hurdle and is the stain area of measured a series of sanitary pads of making by the present invention.

The table I

The stain area (centimetre ²) (inch ²)

Amount of liquid is full of toilet paper part toilet paper

15ml 6.48（2.55） 4.14（1.63）

10ml 6.78（2.67） 3.12（1.23）

5ml 5.41（2.13） 1.98（0.78）

By the table I as can be seen, under the situation of each different volumes liquid, use prior art (being full of toilet paper) sanitary pad present one more much bigger than the present invention sanitary pad (part toilet paper) stain area.

Claims (19)

1, a kind of sanitary pad comprises:

One has the absorption pad that vertical lateral prolongation is arranged between health veneer and the clothes veneer;

A covering is made up of not saturating body fluid paper that is laminated on the fibrous paper, and above-mentioned fibrous paper is wideer than above-mentioned not saturating body fluid paper, makes above-mentioned fibrous paper extend not saturating body fluid paper,

It is characterized in that:

Above-mentioned not saturating body fluid paper has enough width, covers clothes veneer and vertical at least lateral part of above-mentioned pad for above-mentioned not saturating body fluid paper;

Above-mentioned fibrous paper has enough width to cover the clothes veneer of pad, vertical vertical peripheral part of side and health veneer and extend the not edge of saturating body fluid paper, but be not enough to cover the center major part of above-mentioned pad health veneer;

Above-mentioned covering covers whole described pad, and its fibrous paper partly contacts with vertical peripheral part of the clothes veneer of pad, vertical side and health veneer.

2, by the sanitary pad of claim 1, it is characterized in that further providing above-mentioned pad of one deck cover encloses and above-mentioned covering.

3,, it is characterized in that above-mentioned cover layer is made up of hydrophobic material that can saturating body fluid by the sanitary pad of claim 2.

4, by the sanitary pad of claim 1, the center major part that it is characterized in that not the health veneer of the above-mentioned pad that covered by above-mentioned fibrous paper account at least above-mentioned pad the health veneer the gross area 30%.

5, by the sanitary pad of claim 4, the center major part that it is characterized in that not the health veneer of the above-mentioned pad that covered by above-mentioned fibrous paper account at least above-mentioned pad the health veneer the gross area 40%.

6, by the sanitary pad of claim 1, the center major part that it is characterized in that not the health veneer of the above-mentioned pad that covered by above-mentioned fibrous paper be not more than above-mentioned pad the health veneer the gross area 85%.

7, by the sanitary pad of claim 1, the center major part that it is characterized in that not the health veneer of the above-mentioned pad that covered by above-mentioned fibrous paper be not more than above-mentioned pad the health veneer the health veneer area 60%.

8, by the sanitary pad of claim 1, it is characterized in that above-mentioned fibrous paper is a toilet paper.

9, by the sanitary pad of claim 8, it is characterized in that about 10 to the 30 gram/rice of above-mentioned toilet paper basis weight ²

10, by the sanitary pad of claim 9, it is characterized in that this toilet paper basis weight from 13 to about 26 gram/rice ²

11,, it is characterized in that above-mentioned not saturating body fluid paper is polyethylene film by the sanitary pad of claim 1.

12, by the sanitary pad of claim 11, it is characterized in that above-mentioned polyethylene film thickness is about 0.0025-0.075mm(0.1 to 3.0 mils).

13, by the sanitary pad of claim 12, it is characterized in that above-mentioned polyethylene film thickness is about 0.0050-0.025mm(0.2 to 1.0 mils).

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