CN1010658B - Trough of belt sanitary towel with dry cover - Google Patents

Abstract

The sanitary towel that provides is characterised in that cleaning and dry property that its covering has combine with the outflow and the transport properties of squeezing groove.Sanitary towel's another feature is that absorbent cores has a cannelure of compressing on fit at least.A kind of cover layer hydrophobic, porous human body effluent be layered on said fit and groove above.And said cover layer extends to groove and bonding with bottom land.

Description

Trough of belt sanitary towel with dry cover

The invention provides a kind of sanitary towel, its structure comprises the effluent distributing slot, and this groove is compressed on the absorption piece of sanitary towel; Be covered with cover layer at fit face, when the human body effluent deposits in the above, can keep its cleaning and drying.Particularly, the sanitary towel that the present invention relates to, its structure can make full use of the distribution property of groove to effluent, and without detriment to cover layer cleaning and dry.

Sanitary towel all is the loose liner of combination or has absorbefacient fibrous layer for many years, and as paper pulp or staple fibre, general density is uniformly, is enclosed in the tectal the inside of permeable human body effluent, and is pasting the effluent barrier layer of clothing face shop with impermeability.How many energy of sanitary towel although it is so are satisfactory, but people recognize that the uniform density liner can not make full use of the absorptive capacity of liner for a long time.And just think that it can not reuse, that is, it is saturated that liner does not also have, and the human body effluent just drains to the outside of pasting the clothing face.

For fear of this problem, existing before this people has proposed some suggestion, wherein be typically the United States Patent (USP) 4 of authorizing Pierre Franco on January 22nd, 1980 the most, 184,498, wherein disclose the liner that is provided have fine and close, extend axially, the groove of central configuration, this groove is compressed into fit, marginal portion density around liner is low, and central groove is used to dredge the effluent that becomes silted up in central authorities, therefore can utilize the absorbability of liner better.Common transfer 530, the 320 series applications of the United States Patent (USP) of nineteen eighty-three JIUYUE application on the 8th disclose the liner of similar sanitary towel's trough of belt, and the density of this liner is asymptotic variation from low to high along middle body to the marginal portion.The sample of density has further improved the transporting of effluent like this, thereby can bring into play the absorptive capacity of liner more fully.

Except the transporting problem to effluent, this technology also is related to the tectal useful feature of sanitary towel recently.After the alluvial of human body effluent, sanitary towel still can keep its cleaning and exsiccant outward appearance.Therefore, people select cover layer or the veneer of thin film as sanitary towel, and it can not only permeate the human body effluent, but also can hydrophobicity promptly not arranged by the moistening of effluent institute.This hydrophobicity surface lining keeps having many advantages on the relatively dry at it.In addition, since not wetted, so be unlikely to pollute outer surface.Suggestion in this technology at present mostly is the application of hydrophobicity veneer aspect absorption human body effluent product.For example, United States Patent (USP) 3,695, No. 269; Propose for 4,041, No. 951 and 4,391, No. 869 with the veneer of hydrophobic nonwoven as sanitary towel.And No. 2,992,644, United States Patent (USP); That 3,814, No. 101 and 4,324, No. 246 propose to have is hole, that can see through the human body effluent, hydrophobic whole thin polymer film made surface lining.

An assignee reports files PPC-251 number, apply for the on the same day with it and common U.S. Patent application of transferring the possession of to a higher authorities for approval, useful especially veneer has been proposed, it is not only non-woven material in fact, can see through effluent, and after absorbing the human body effluent, can improve the cleaning and the degree of drying of its outward appearance greatly.This veneer is characterised in that and is mixed with 5-12%(weight) whole polyolefin film of titanium dioxide, and have hole that the human body effluent is therefrom passed through.The aperture area of hole accounts for the 13-35% of the human body effluent passage gross area.Two factors of described aperture area and content of titanium dioxide match, and just make after effluent flows through, and veneer is still dry.In addition, because multicolour pattern covers below and absorbs in the liner, so also can present outward appearance dry and cleaning.

Therefore people can see the solution that has proposed effluent transporting in the improvement liner, and have proposed to provide the tectal way with cleaning and dry outward appearance.But regrettably, it is found that single resulting result of liner that uses can not be satisfactory when attempt adopts the way of suggestion to handle these two problems (be the transporting of effluent and keep clean and exsiccant outward appearance).Yet, when the cover layer of the Docket PPC-251 patent that adopts above-mentioned assignee to provide, even without central groove, the exsiccant again character of good cleaning can be arranged also on the liner.Yet, when use has the cover layer of groove sanitary towel, although the most of fit face of cover layer is a cleaning and exsiccant, and also also like this to user.But the part of covering layer that is layered on the groove still remains with sub-fraction but that can measure, obvious visible human body effluent.Therefore, need provide a kind of such sanitary towel; Existing cleaning of its cover layer and exsiccant character, the character that has the fluting liner to carry effluent again.

According to sanitary towel provided by the present invention, its structure is got the perfect advantage of its fluting liner, the liner of especially this fluting also has the character of carrying effluent simultaneously, adopts the hydrophobicity cover layer simultaneously, can obtain this tectal clean and dry good characteristic.

Sanitary towel provided by the present invention comprises that one has fit absorbent cores and a subsides clothing face, and fit is being pasted human body, is used to absorb the human body effluent, and pastes fit dorsad of clothing face, and the position that normally faces toward the underwear jag of wearer has on.At least extrude a cannelure on fit of absorbent cores, this groove has the wall and the end.The groove of this shape helps vertically carrying the human body effluent.Sanitary towel provided by the invention is furnished with hydrophobic, and the cover layer of permeable human body effluent is layered on fit of the absorbent cores that comprises squeezing groove.According to disclosed in this invention,, cover layer extended in the groove, and stick on the bottom land in order to give full play to the exsiccant again characteristic of the tectal cleaning of this hydrophobicity.Contrast technology of the present invention, according to disclosed content, if cover layer only covers on the groove or only covers in the groove, be layered on cover layer zone on the groove and can reach and can find out and can measure its a certain amount of wetness degree, this function and aesthetic on be unfavorable.

According to the structural material of cover layer and absorbent cores, cover layer can be adhered to bottom land effectively with several different methods.For example when cover layer adopts thermoplastic, just can adopt heat or hot pressing plus-pressure promptly from heat bonding.In addition, useful binders bonds to bottom land with cover layer.In a most preferred embodiment, jointing material is promptly to produce bonding active material with relative low-temperature heat.

The shape of groove can have very big variation, although flute profile changes, requires sanitary towel still can embody predetermined advantage.Groove preferably should be along the longitudinal extension of absorbent cores, certainly this not necessarily strict maintenance linear of groove that should be understood to prolongation stretches, that is to say that groove can be arcual, sine-shaped or groove major part is other curve shape, and just extends along the longitudinal substantially.Can adopt more than one similar groove.

The hydrophobicity cover layer is polymer thin-film material preferably, and it can make effluent see through effluent by means of top hole.The cover layer of the relevant patent protection of common transfer that cover layer so, preferably above-mentioned assignee Docket PPC-251 carried out in patent application the same day.

Simple declaration to accompanying drawing

Fig. 1 is the perspective view of sanitary towel of the present invention, and has several sections to remove to show its internals;

Fig. 2 is with the drawing in side sectional elevation of Fig. 1 sanitary towel along straight line 2-2.

Fig. 2 a and Fig. 2 are similar, but illustratedly do not adopt sanitary towel of the present invention.

Fig. 3 is the profilograph of Fig. 1 sanitary towel along straight line 3-3.

Fig. 4 is the plane graph of fit of Fig. 1 sanitary towel.

Fig. 5 is the perspective view that utilizes another structure of sanitary towel of the present invention.

Fig. 6 is the drawing in side sectional elevation of sanitary towel shown in Figure 5.

Fig. 1 is the perspective view of first sanitary towel 10 of the present invention.Fig. 2,3 and 4 illustrates drawing in side sectional elevation, vertical section and the plane graph of sanitary towel 10 respectively.

Sanitary towel 10 is normally by a plane absorbent cores or be made up of the liner 12 that any absorbing material that is suitable for as sanitary towel is made.These materials that constitute sanitary towel's liner comprise the water wetted material that Absorption is arranged that combination is loose, such as cellulose fibre, as wood pulp, regenerated fiber or cotton fiber.Available chemistry or physical method be these fibre modifications, and the fiber of liner can be to combine with natural or synthetic other material, for example hydrophilic foam plastics and other hydrophilic polymers etc.

As Figure 1-3, liner 12 usefulness fabric wrappages 14 are wrapped one deck, and this wrappage holds together together product in manufacture process, and keep the shape of final products.

This face of subsides clothing face 17(that human body effluent non-permeable formation 18 is layered on liner 12 is a user health dorsad) and liner 12 to small part seamed edge 19.Non-permeable formation 18 is used to prevent that the human body effluent is thoroughly to underwear, and can use any this purpose material that is suitable for, for example non-permeable formation 18 can be thin polymer film or the glued membrane that polyethylene, polypropylene are made, also can adopt seepy material to become the material of impermeability after treatment, as waterproof paper or fabric.Advantageously non-permeable formation 18 has adopted and has been subjected to the agglutinating material of heat energy, and as polyethylene, it can make paste layer 16 seal liner 12 tightly.

In a kind of preferred construction, the skin of the subsides clothing face of sanitary towel 10 is made of nonwoven fabric layer 20.This adhesive-bonded fabric skin can make sanitary towel attractive in appearance, and soft.

As Fig. 2-3 was accurately described, it was to use pressure-sensitive bonding strip 22 that the clothing face pastes in the sanitary towel that is provided, and sanitary towel can be bonded on the position of wearer underwear jag.Illustrated as this concrete sanitary towel, these bonding strips 22 are made up of three longitudinal extension bands.Bonding strip or band are protected with an anti-stick (release strip) 24, to avoid using preceding generation undesirable bonding.

Be pressed into being and having wall 5 and the extension slot at the end 73 in fit 15 of liner 12.3 of grooves see it all is that the length of groove 3 longitudinal extensions equals liner 12 effective lengths, is at least 10% of liner 12 length, preferably is not less than 25% on the position of central authorities fit 15 of liner 12 from vertical and horizontal.Yet groove can not exceed the transverse ends of liner 12.As mentioned above, groove is to be used for carrying the human body effluent of alluvial on fit of sanitary towel 10, and effluent is infiltrated in the liner 12, therefore just more can utilize the absorbability of liner 12 on the bearing of trend of groove fully.As what Fig. 2 described in detail, the groove of describing with cross section generally is the U type, and obviously groove V-shaped or the W type also can both be satisfied the demand on cross section.The width of groove and the degree of depth are not very strict, as long as the size of groove is enough finished fluidic conveying function, the width of this groove preferably is about 0.1-3 centimetre, about deeply 0.1-1.5 centimetre.

Covering on 12 fit 15 of the liners is the cover layer 16 of hydrophobic, permeable human body effluent, the polyolefin film of monoblock preferably, and it has hole, and the human body effluent is passed through, and reaching and being retained in absorbent cores is in the liner 12.It is sophisticated that preparation now has the technology of voided films, and these technology comprise that at first imporous monoblock polyolefin film is made in requirement, afterwards with pin or other similar thing puncture pore-forming; The puncture that mold pressing continues; The weak zone of heating attenuation; Calendering or other make the film distortion of attenuation with perforate on selected zone selectively.

3,137, No. 746 United States Patent (USP) has been introduced a kind of useful especially method.This method introduction be to adopt calendering to stamp the thin polymer film of original pattern, web-shaped product is made in mold pressing just or thin film done the method for concavity stricture of vagina.

The polyolefin that surface lining of the present invention uses is selected from polyethylene, the copolymer of polypropylene or itself and high density polyethylene (HDPE).Also can use other polymer in order to improve desired character, for example, a kind of useful especially mixture comprises that minority contains the polymer of aryl, as impact-resistant polystyrene.This mixture is introduced in 4,135, No. 021 patent of the U.S., and as what discussed, wherein the contained aryl ratio of polymer is not more than 40%(weight), preferably be not more than 20%(weight), i.e. 5-20%(weight).

Speak of in 4,135, No. 021 patent of the aforementioned U.S., can contain inertia extinction material such as titanium dioxide in the material, its content is very high to be 5%, it is said in order to improve material appearance and separability.To the content that description Of The Invention and the top Docket ppc-251 that has mentioned number the patent application of awaiting the reply is like this introduced, can find that such material is not suitable for being used for covering sanitary towel fully and absorbs the stain that occurs behind the human body effluent on the absorption region.In conjunction with aforementioned restriction to aperture area, such sanitary towel's surface lining should contain many titanium dioxide (perhaps with the material that similar delustring character is arranged).The addition of titanium dioxide must be greater than 5%(weight), but be preferably lower than 12%(weight).Selected such addition upper limit is to surpass 12%(weight according to content) time, titanium dioxide can come out by segregation from the mixture of polymer in manufacture process.In the therefore too high addition practice is impracticable.Best addition is in 7-10%(weight) between.

As described in the patent specification (PPC-251), in order to reach the desirable effect of covering, the high addition of titanium dioxide must match with aperture area institute limited field.Here said aperture area is meant the entire area of hole, shows with its proportional shared in fit the gross area, and the gross area is to measure according to the fit face that absorbs product.Very clear, there is not open region to bring up to maximum limit to the ability that veneer is covered stain fully.From needless to say, there is not open region just to equal to remove the passage that the human body effluent enters the sanitary towel uptake zone certainly yet.Therefore must provide certain aperture area.United States Patent (USP) 4,324 proposes that aperture area is minimum to should be 35% in No. 246, and preferably 55%, find that if use very big aperture area, veneer is covered effect and will be reduced greatly.If under the situation of filling TiO 2 not, the stain of then covering can be very clearly in sight by veneer.In addition, also find to carry effluent, there is no need to limit so big aperture area fully for satisfying by veneer.In order to make whole sanitary towel satisfy the requirement of carrying effluent, it is fully suitable that aperture area is about total fit area 15-35%.And when running into the very low situation of human body effluent flow velocity, such as little liner, or as under other situations such as sweat absorbing towel, the aperture area of sanitary towel is low to 13%, also is acceptable.

Above-mentioned cover layer has very big advantage with regard to its nonwetting property, and has covered the zone that following quilt stains.In fact, the cover layer on the product is mainly used in this kind purpose shown in Fig. 1-4.Yet when the human body effluent was bestowed on the cover layer, the cover layer part that people can find to be layered on above the groove 3 can show the undesirable moistening that not only can find out but also can measure.When cover layer is only wrapped a circle, or be placed on the top of this product and seal the marginal portion on barrier layer 20, to such an extent as to when sealing trough of belt liner 12, promptly moistening can occur.Similarly, if be placed on for cover layer on the liner of slotless, extrude groove then like this during situation on liner, it is lubricated groove zone cover layer also can to occur.Under latter event, when the cover layer on being attached to groove partly is pulled to the groove that to a certain degree enters formation, after removing pressure, be not convenient to break away from from bottom land if do not take effective measures the harder covering layer material of prevention.In this case, undesirable moistening meeting shows once more.

According to the technology that this paper provided, find that this problem can get rid of with following effective measures, promptly provide a kind of cover layer to be bonded to sanitary towel on the bottom land effectively.Finish this bonding though can in all sorts of ways, from practical viewpoint, some method is more better than other method.For example, can select a kind of polymer, make this material temperature distortion, softening and fuse with gasket material during application in the bottom of groove as tectal material.And bond above it.Therefore, cover layer is placed on the slotted liner, uses and be applicable to that the heating formpiston of stock size is pressed into cover layer in the groove, and cover bonding is arrived bottom land.In addition, cover layer can be placed on the liner of unslotted, on pad, extrude groove simultaneously with a similar formpiston, and with cover bonding on bottom land.As with above-mentioned polyethylene cover the time, this method (be called the self-heating mull technique here, just do not add binding agent in addition) can be subjected to the influence of polythene material characteristic, and has the advantage that needn't add jointing material in addition.In addition on the one hand, when this method is used under high-temperature too, or interlude is oversize, might melt whole covering layer materials, perhaps destroy its integrity, perhaps be bonded on the processing unit (plant) and it must be cleaned, therefore must carefully be controlled, for example, when using polyethylene cover, the formpiston maximum temperature should be between 140-150 ℃, and be used for tectal interval, can not be above 0.4 second.

Other method is to adopt jointing material, emulsion binder for example, and it can be used for being bonded in the cover layer part on the groove.Cover layer is pressed in the groove, and after the adhesive, cover layer will adhere on the bottom land.For this purpose, can select multiple binding agent for use, mentioning problems of excessive heat above can be solved.The defective of this method is that binding agent must solidify, and usually gets on very well, and promptly disperse medium must vapor away from system.

For cover bonding is arrived bottom land, a preferable methods is to adopt so-called hot-melt adhesive.Hot-melt adhesive at room temperature is solid-state and cannot be sticking, but when being heated, is clamminess with regard to deliquescing.As remove thermal source, they are with regard to rapid cooling and curing and be the non-sticky state.Hot-melt adhesive has activable cohesive in the temperature range widely.The bonding active temperature of the preferential hot-melt adhesive that adopts must be below the fusing point of covering layer material among the present invention.At least than low 1 ℃ of its fusing point, can be compared to low 2 ℃ at least of cover layer fusing points most.For example, concerning polyethylene cover, its fusing point is about 127 ℃, and the hot-melt adhesive composition is preferably lower than 124 ℃ below 126 ℃, just should have bonding activity as 123 ℃.

It also is very important being chosen in the hot-melt adhesive that does not have viscosity under the very low temperature.Product of the present invention so just can store under higher temperature, particularly in the some months in summer.Therefore, hot-melt adhesive is in about cohesive that do not have below 60 ℃ the time, and bonding activity does not have when being preferably in below 66 ℃.

Can obtain diversified commercial hot hot melt adhesive composition at present, and applicable to product of the present invention.This class binding agent that has successfully been utilized generally is poly-(ethylene vinyl acetate)/polyphenylacetylene combination, the mixture of randomly branched hydrocarbon polymer and polyvinyl acetate/polystyrene hydro carbons block copolymer.

As Fig. 2 show that clearly cover layer 16 is to utilize hot melt adhesive thing 9 to adhere to the bottom of groove 7.Should recognize, though Fig. 2 explanation is to be bonding medium with hot-melt adhesive, as employing emulsion binder or only use from hot adhesion as adhesive means, Fig. 2 sanitary towel sketch map seems to be the same basically.

Binding agent 9 can be a whole piece, just in time occupies the total length of whole groove 3, and binding agent 9 also can not be a whole piece or a part that only accounts for flute length.When every centimeter length of groove is used 0.0004 gram binding agent, can obtain good bond effect, though every centimeter length is preferably used the binding agent that is no less than 0.0006 gram, that is to say that the groove of 3 centimeter length will be with 0.0024 binding agent that restrains.Under any circumstance, every centimeter length binder dosage should not be preferably lower than 0.002 gram per centimeter greater than 0.004 gram.

When making sanitary towel, hot-melt adhesive can be added on the bottom land of molding.One of selective method is that this binding agent is added in the zone that liner (fabric wrappage) is gone up desire system groove, can covering be placed on the liner, by making groove and bonding cover layer with the formpiston of heating again.Another alternative method is that hot-melt adhesive is added on tectal that zone of desiring to be attached on the groove, and is bonding cover layer with the formpiston of heating.This formpiston also can be used for grooving.

Another embodies alternative sanitary towel 30 of the present invention, is illustrated in Fig. 5 and Fig. 6.Sanitary towel 30 has an absorbent cores, and promptly liner 32.Cover that to paste in sanitary towel on the clothing face be barrier layer 34, this barrier layer also covers vertical seamed edge, and as shown in the figure, it may also cover fit an of part.With with the similar method of sanitary towel shown in Fig. 1-4, strip of glue (two) 36 also is equipped with in order to sanitary towel is bonded on the underwear in sanitary towel 30, prevents that with one stick is protected before said strip of glue is used.

The cover layer 40 that is provided covers on fit of sanitary towel, and folds with pasting the clothing hand-deliver at its reverse side, so it is liner 32 and barrier layer 34 whole encasing.This layer film clean with regard to it and the described cover layer of dry property and Fig. 1-4 16 similar.

With with the aforementioned embodiment similar manner described in for example of the present invention, on liner 32, extrude groove 16, this groove has the wall 48 and the end 50.As scheme meticulous describing, be positively to be bonded in according to cover layer 40 of the present invention with binding agent 52 at the end 50 of groove 46.

Be the following advantage of explanation the present invention, following embodiment be provided:

Example 1

The sanitary towel that preparation has Fig. 1-4 shape that is exemplified, structure and character.All sanitary towel's greatest lengths are about 25 centimetres.Minimum widith is about 5 centimetres, and maximum ga(u)ge is about 2 centimetres.Contain heavily about 9 grams of liner of wood pulp cellulose, the groove of extrusion is positioned at the central authorities of liner veneer, and 7.6 centimetres of flute length are wide 0.3 centimetre, dark 0.6 centimetre.Used covering layer material is netted polyethylene, as the patent application assignee Docket that awaits the reply report to a higher authorities for approval describe in detail in files ppc-251 number.This tectal aperture area is 25%, 7.5%(weight) titanium dioxide mix in the polyethylene as opacifying agent.

Form first system of sanitary towel by one embodiment of the present of invention, polyethylene cover is bonded on the bottom land by the self-heating adhesive method.Second sanitary towel that series comprised attempts with hot adhesion method bonding, but not success.The result makes the sanitary towel just like general structure shown in Fig. 2 a, and the drawn assembly of the assembly that identical numbering wherein arranged and Fig. 2 is identical.Should be pointed out that shown in Fig. 2 a and difference of the present invention to be that cover layer 16 is not adhered on the bottom land, but on the crossed slot.The 3rd the sanitary towel's series that provides, the hotmelt that is referred to as HM2152 with H, a B, Fuller company adheres to cover layer on the bottom land, and this binding agent contains general poly-(ethylene vinyl acetate).This binding agent is put on the subsides liner face of cover layer 16.And its length is basic identical with groove.So the amount of binding agent is about 0.006 gram.Below 1000 ℃, adopt the way of heating bonding about by formpiston.The 4th sanitary towel's series of preparation used hot-melt adhesive, but cover layer is not bonding with bottom land, so sanitary towel still has the general structure of Fig. 2 a.

At last, the 5th sanitary towel's series of preparation, be in liner, do not have slotted.

Example 2

Each sanitary towel described in the example 1 is all tested, to be determined at the clean appearance dry situation of bestowing behind the effluent.Employed effluent is a kind of menstrual fluid composition that substitutes, and its saliferous also has the surface tension characteristics of menstrual fluid, and is dyed similar color.Each sample all be fit towards on be placed on the glass plate.A foraminous poly (methyl methacrylate) plate, its hole are just in time on fit of the foraminous sample of sanitary towel center.The hole is oval-shaped, and its major axis (with sanitary towel's longitudinal register) is 4cm, and minor axis is 2cm.Glass thickness of slab 1.3cm.The menstrual fluid succedaneum of getting 15 milliliters is added in the sanitary towel, makes the hole remain full of state, is all passed through by the hole to 15 milliliters of liquid.Take away plate afterwards, the cover layer in the perusal groove scope is determined the moistening situation of its outward appearance.The quantitative way of wetness degree is with the cover surface in the careful wiping groove scope of an artificial pompon of having weighed in advance (about 0.5 gram), and once more weighing to determine the artificial pompon institute absorption liquid scale of construction.Experimental data points out that as measuring with above-mentioned wipe method, when the liquids about having at least 0.017 to restrain existed, perusal can find out that just cover layer wets.If liquid is less again, be commonly considered as doing with perusal.

The listed data declaration of table 1 does not have the result of slotted sample series.

Table 1 is the sanitary towel of indent not

Sample sequence number cover layer appearance surfaces liquid (gram)

1 does 0

2 do 0

3 do 0.006

4 do 0

5 do 0

6 do 0.004

7 do 0

8 do 0

9 do 0

10 do 0.006

11 do 0

12 do 0

13 do 0.004

14 do 0

15 do 0

16 do 0

17 do 0

18 do 0

19 do 0

20 do 0

That " cover layer outward appearance " hurdle writes down is macroscopic result, and that " surface liquid " hurdle record is the result of above-mentioned wipe method.As from table 1 finding, the cover layer of slotless not only seems, and practical measurement is also done.Only on the sample of seldom counting, found liquid, but amount is few to ignoring.

Data declaration heat bonding with table 2 is invalid, sanitary towel then to Fig. 2 a in the result of the test of similar sample series of graphic extension.

The not bonding tectal sanitary towel of table 2

Sample sequence number cover layer appearance surfaces liquid (gram)

1 does 0.0133

2 wet 0.030

3 do 0.010

4 wet 0.080

5 wet 0.028

6 wet 0.025

7 wet 0.020

8 wet 0.020

9 wet 0.025

10 wet 0.111

11 wet 0.010

12 do 0.012

13 wet 0.020

14 wet 0.027

15 do 0.012

16 wet 0.018

17 wet 0.017

18 wet 0.020

19 wet 0.068

20 wet 0.019

Opposite with the sanitary towel of table 1, once there is groove to exist, in most of the cases, the outward appearance of moistening is just showed in the cover layer zone, and can measure the actual amount of liquid.Though be that this opposite result is genuine with same clean and dry covering layer material in fact with indent sanitary towel not.

The result of sanitary towel's series that the data declaration of table 3 makes according to the present invention, its cover layer is by being adhered to (being that heat bonding does not add binding agent) on the groove from heat bonding.

Table 3 has the tectal sanitary towel of automatic heat bonding

Sample sequence number cover layer appearance surfaces fluid (gram)

1 does 0

2 do 0

3 do 0

4 do 0

5 do 0

6 do 0

7 do 0

8 do 0

9 do 0

10 do 0

11 do 0

12 do 0

13 do 0

14 do 0

15 do 0

16 do 0

17 do 0

18 do 0

19 do 0

20 do 0

As noted in Table 3, cover layer is heat-bonded on the bottom land, has solved the existing problem of table 2 sanitary towel.

The result that table 4 explanation sanitary towel campaign obtains.Bonding with hot-melt adhesive, cover layer does not bond on the bottom land yet.

The not bonding tectal sanitary towel of table 4

Sample sequence number cover layer appearance surfaces liquid (gram)

1 wet 0.308

2 wet 0.617

3 wet 0.802

4 do 0.008

5 do 0.005

6 do 0.010

7 wet 0.713

8 wet 0.240

9 do 0.008

10 do 0.014

11 do 0.015

12 wet 0.103

13 do 0.009

14 do 0.015

15 wet 0.709

16 do 0.011

17 do 0.003

18 do 0.005

19 wet 0.153

20 wet 0.310

As from table, being seen, cover layer is not bonded to bottom land, almost have 50% sample moistening occur, and nearly all sample all can be measured its amount of liquid.

Table 5 shows cover layer being bonded to the result of sanitary towel's series testing of sanitary towel's bottom land with hot-melt adhesive.

The table 5 bonding tectal sanitary towel of hot melt

Sample sequence number cover layer appearance surfaces liquid (gram)

1 does 0

2 do 0

3 do 0

4 do 0.005

5 do 0

6 do 0

7 do 0

8 do 0

9 do 0

10 do 0

11 do 0

12 do 0

13 do 0

14 do 0

15 do 0

16 do 0

17 do 0

18 do 0

19 do 0

20 do 0

According to the present invention, this binding agent has solved the problem of table 4 sanitary towel moistening, and each routine sanitary towel's cover layer is all done.Have only a sample detection to go out some liquid, yet only reach a unsubstantiality degree basically.

Claims (15)

1, a kind of sanitary towel, the absorbent cores that it is characterized in that comprising fit of having of an elongation and paste the clothing face, it has an extending longitudinally groove that has the wall and the end that is pressed in fit at least; Said sanitary towel has the cover layer of hydrophobic Tou Guoed human body effluent, and this cover layer comprises the continuous film of being made by hydrophobic polymeric material, and the hole on the thin film can permeate the human body effluent; This cover layer is on fit of the said absorbent cores that comprises its squeezing groove; It is interior and bonding with said bottom land that said cover layer reaches said groove, but not bonding with the redundance of this absorbent cores.

2, by the described sanitary towel of claim 1, it is characterized in that cover layer contains thermoplastic, and bonding with automatic hot sticky connection and said bottom land.

3, by the described sanitary towel of claim 2, it is characterized in that cover layer contains polythene material, and be bonded on the said bottom land by hot sticky connection with the formpiston of maximum temperature scope in 140-150 ℃.

4, by the described sanitary towel of claim 1, wherein said cover layer with adhesives on said bottom land.

5, by the described sanitary towel of claim 4, said binding agent is a kind of emulsion binder.

6, by the described sanitary towel of claim 4, said binding agent is a kind of hot-melt adhesive.

7, by the described sanitary towel of claim 6, said hot-melt adhesive has bonding active when temperature is lower than 1 ℃ of the initial fusing point of cover layer at least.

8, by the described sanitary towel of claim 7, used hot-melt adhesive has bonding active when temperature is lower than 2 ℃ of initial fusing points of cover layer at least.

9, by the described sanitary towel of claim 8, said cover layer contains polythene material, and said hot melt is to have bonding active when temperature is lower than 126 ℃.

10, by the described sanitary towel of claim 9, said hot melt is to have bonding active when temperature is lower than 124 ℃.

11, by the described sanitary towel of claim 4, said adhesive consumption is that every centimetre of groove is at least 0.004 gram.

12, by the described sanitary towel of claim 11, said adhesive consumption is that every centimetre of groove is at least 0.0006 gram.

13, by the described sanitary towel of claim 11, said adhesive consumption is that every centimetre of groove is lower than 0.04 gram.

14, by the described sanitary towel of claim 1, said groove is at least 10% of said absorbent cores length along said sanitary towel longitudinal extension length.

15, by the described sanitary towel of claim 14, said groove is at least 25% of said absorbent cores length along said sanitary towel longitudinal extension length.

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