CN1662202A - Absorptive article - Google Patents

Absorptive article Download PDF

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Publication number
CN1662202A
CN1662202A CN038138816A CN03813881A CN1662202A CN 1662202 A CN1662202 A CN 1662202A CN 038138816 A CN038138816 A CN 038138816A CN 03813881 A CN03813881 A CN 03813881A CN 1662202 A CN1662202 A CN 1662202A
Authority
CN
China
Prior art keywords
mentioned
contact portion
pressure contact
guide layer
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN038138816A
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Chinese (zh)
Other versions
CN100482192C (en
Inventor
工藤淳
木下正隆
黑田贤一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
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Unicharm Corp
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Filing date
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Publication of CN1662202A publication Critical patent/CN1662202A/en
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Publication of CN100482192C publication Critical patent/CN100482192C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/535—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
    • A61F13/536—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes having discontinuous areas of compression
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
    • A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
    • A61F13/4752—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means being an upstanding barrier
    • A61F13/4753—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means being an upstanding barrier the barrier being not integral with the topsheet or backsheet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/4704—Sanitary towels, incontinence pads or napkins having preferential bending zones, e.g. fold lines or grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
    • A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
    • A61F13/4756—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means consisting of grooves, e.g. channels, depressions or embossments, resulting in a heterogeneous surface level
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
    • A61F13/4758—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a longitudinal direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

In a position spaced a predetermined distance on the right and left sides from a centerline (Oy-Oy) extending longitudinally of an absorptive article, a crimping section (9) where absorption layers (3, 4) together with a surface sheet (6) are compressed into a recess is formed to extend longitudinally continuously to define a central absorption region (11) between such crimping sections and an auxiliary absorption region (12) on the outer side of the crimping section, wherein in the central absorption region, a liquid guide layer (5) made of fibers joined together to leave voids in the interior and lower in density than the absorption layer is installed between the absorption layer and the surface sheet so as not to overlap the crimping section; thus, in the auxiliary absorption region, the absorption layer is covered with the surface sheet.

Description

Absorbent commodity
The explanation of association request
The application advocates to apply for according to the priority of the Japanese patent application of the Japanese patent application application on March 31st, 2002-253837 number 1 of the Japanese patent application application on August 30th, 2002-175127 number 1 of application on June 14th, 2002 2003-95032 number.The content that a part of announcing as this description is quoted above-mentioned Japan patent applicant announce.
Technical field
The present invention relates to be fit to the absorbent commodity of absorption, particularly the higher liquid of draining on top flat of viscosity can be absorbed absorbed layer rapidly, and dwindle the absorbent commodity of liquid range of scatter from excretory menses of female sex organs or leucorrhea etc.
Background technology
Absorption is that the surface of absorbed layer is covered by the top layer of permeability for liquids from the general structure of the absorbent commodity of the excretory menses of female sex organs.Above-mentioned absorbed layer is formed by the hydrophilic fibre of paper pulp etc. and the mixture of high-absorbable polymer (SAP), above-mentioned top flat uses following non-woven fabrics, i.e. non-woven fabrics that is formed by the hydrophobic chemical fibre that passes through hydrophilic treated or the non-woven fabrics that formed by the hydrophilic fibre of artificial silk etc.
On this absorbent commodity, the higher absorbed layer of density that forms by hydrophilic fibre be positioned at top flat under.Therefore, the liquid that is applied to topsheet surface is absorbed by the hydrophilic and the capillarity of above-mentioned absorbed layer, sees through top flat rapidly and is absorbed and remains on above-mentioned absorbed layer.
But, the higher and lasting drainage of menses ratio of viscosities during owing to menstruation, therefore, above-mentioned absorbed layer is when having kept liquid to a certain degree, and liquid is saturated easily in top flat.Though promptly menses see through the table sheet rapidly by deadweight, but because the Liquid Absorption velocity ratio that capillarity produces is slow a little at the liquid permeation rate of this top flat, therefore, if be applied in a large amount of liquid in the short time, then absorbed layer can absorb Wan this a large amount of liquid, and liquid remains in the top flat easily.Because the on every side diffusion of this liquid in top flat, top flat is got wet by menses on a large scale, makes the skin of user that moist feeling is arranged easily.And,, might make user produce visual detest sense because the range of scatter of lip-deep menses increases.
Open on the one hand and disclose than top flat low density second on the flat 11-192259 communique, between the top flat of this second absorbed layer that is present in cotton official form for filing a lawsuit slurry and the mixture formation of superabsorbent polymer and permeability for liquids the spy.This second is that the composite fibre that passes through hydrophilic treated engages formation.
The purpose of inventing described in this communique is the liquid that is applied to top flat by being carried out absorbing, arriving absorbed layer by second, and body fluid is difficult to be trapped on top flat and second.
But the liquid that sees through second of above-mentioned top flat arrival still can not be avoided along second diffusion towards periphery.In the absorbent commodity described in the above-mentioned communique owing to second area is not limited especially, therefore, if liquid along second diffusion, liquid is at top flat also diffusion easily thereupon.
In addition, because described in the above-mentioned communique is the whole plane that is, therefore, sees through second liquid that is absorbed by the absorption layer extensive diffusive in highdensity absorbed layer, even the outer peripheral areas beyond second also becomes a lot of liquid easily and is present in state on the absorbed layer.On outer peripheral areas, because top flat directly contacts with the surface of absorbed layer, even in above-mentioned outer peripheral areas, soon, top flat is easily by hold-up after bringing into use.Therefore, top flat becomes moisture state on a large scale, make user that airtight sense is arranged easily, and the liquid that propagates into topsheet surface is easy to generate side leakage.
And in the manufacturing process of absorbent commodity, the non-woven fabrics that is rolled into the stock reel shape generally is used to second formation, and non-woven fabrics is cut into the shape of regulation after pulling out from stock reel.
But in the form of stock reel, the volume of non-woven fabrics (thickness) is because its winding pressure is destroyed, and non-woven fabrics is taken care of up to use with this state.Therefore, pulling out afterwards from stock reel, the volume of non-woven fabrics also is ruined state.In made by this non-woven fabrics second, internal voids is also destroyed, becomes density than higher state.
Therefore, it is slack-off that the liquid that sees through its top flat is inhaled into second speed, and liquid is trapped in top flat easily.And, owing to be inhaled into liquid in second before being absorbed by the absorption layer, propagate into density than in higher second, diffusion towards periphery, therefore, on a large scale, liquid holdup on second, its result, this liquid returns top flat easily.
In addition, on impaired second soft feeling in use of volume problem is arranged also.
The present invention is in view of above-mentioned existing problem, purpose provides following absorbent commodity, promptly suppress the range of scatter of liquid on top flat by being absorbed in the liquid that applies repeatedly in the limited zone rapidly, and, absorb the liquid that arrives outer peripheral areas rapidly by total energy and prevent side leakage.
Summary of the invention
The present invention is a kind of absorbent commodity, comprise: egative film, the top flat of permeability for liquids and absorbed layer, absorbed layer possess hydrophilic property material, be set between the top flat of egative film and permeability for liquids, from the centrage of the longitudinal extension of absorbent commodity on the position of leaving left and right sides predetermined distance, absorbed layer is compressed with above-mentioned top flat, the pressure contact portion that becomes concavity vertically is being formed extended at both sides continuously, regulation middle absorbent zone between above-mentioned pressure contact portion, in the auxiliary absorption region of regulation, the above-mentioned pressure contact portion outside, in above-mentioned middle absorbent zone, liquid guide layer quilt and above-mentioned pressure contact portion are not arranged between above-mentioned absorbed layer and the above-mentioned top flat overlappingly, this liquid guide layer is made of the fiber that leaves ground, space joint in inside, and it is lower than above-mentioned absorbed layer density, therefore, in above-mentioned auxiliary absorption region, above-mentioned absorbed layer is covered by above-mentioned top flat.
In the absorbent commodity of the present invention, on the middle absorbent zone, the liquid that is applied to top flat leans in the space that reenters low-density liquid guide layer, is absorbed by liquid guide layer, and, hydrophilic interaction and capillarity that the liquid of liquid guide layer is positioned at the absorbed layer below it attract, and are absorbed by the absorption layer, keep.Therefore, even liquid is applied to the middle absorbent zone repeatedly, by the transfer of liquid to liquid guide layer, can suppress the delay of liquid at top flat, top flat always can be kept the state that liquid is passed through easily.In addition, liquid guide layer only is set in the limited scope in middle absorbent zone, and therefore, the liquid that is applied repeatedly mainly sees through the limited scope in the middle absorbent zone, can suppress the diffusion of liquid on top flat, makes the some absorption of liquid become possibility.In addition, owing to be absorbed by the absorption layer, will be stoped by above-mentioned pressure contact portion to the liquid of side diffusion, therefore, liquid is not easy to arrive auxiliary absorption region.Therefore, in auxiliary absorption region, top flat is not easy to become saturation, always is inhaled into attached to the liquid of assisting the absorption region to be positioned at its just following absorbed layer.Therefore, liquid can be fixed on the middle absorbent zone in the diffusion of top flat, make the skin of user be not easy moist feeling, in addition,, therefore prevent the side leakage of liquid easily because the state that liquid is absorbed rapidly always can be kept in auxiliary absorption region.
It is desirable to, above-mentioned pressure contact portion further extends, mutually continuously, and the scope of surrounding regulation is as above-mentioned middle section, and the aforesaid liquid guide layer has than the little area in above-mentioned middle absorbent zone, and is not overlapping with above-mentioned pressure contact portion.
If the middle absorbent zone is surrounded fully at pressure contact portion, then the diffusion zone of the liquid that applies repeatedly can be limited in the middle absorbent zone.
It is desirable to, above-mentioned absorbed layer is made of lower floor's absorber and superimposed upper strata absorber on above-mentioned lower floor absorber, the area of upper strata absorber is less than lower floor's absorber, and area greater than above-mentioned middle absorbent zone, at above-mentioned pressure contact portion, above-mentioned lower floor absorber and above-mentioned upper strata absorber are compressed with above-mentioned top flat, form concavity, above-mentioned auxiliary absorption region has the heavy section adjacent with above-mentioned pressure contact portion, and at this, above-mentioned lower floor absorber and above-mentioned upper strata absorber all exist, in addition, the outside at above-mentioned heavy section has thinner wall section, at this, above-mentioned lower floor absorber exists, and above-mentioned upper strata absorber does not exist.
In this structure, owing to be not only the middle absorbent zone, also form fluffyly by the exterior lateral area of pressure contact portion, therefore, portion flexibly contacts between the hip thigh of absorbent commodity and user.In addition, suppose that a large amount of liquid crosses pressure contact portion and arrive auxiliary absorption region, this liquid also can absorb rapidly by the heavy section by the pressure contact portion outside.
In above-mentioned middle absorbent zone, be preferably formed as a plurality of liquid and seen through the hole, this liquid connects above-mentioned top flat through the hole and extends to above-mentioned liquid guide layer.In addition, around aforesaid liquid saw through the hole, the chemical fibre that forms above-mentioned top flat preferably was carried out heat bonding with the chemical fibre that forms the aforesaid liquid guide layer.
Liquid sees through the hole and connects above-mentioned top flat after above-mentioned liquid guide layer is formed extended at both sides, and in the middle absorbent zone, the liquid that is applied on the top flat is soaked in the zone that is provided with liquid guide layer easily.
In order to make the liquid that is applied repeatedly see through top flat rapidly, the fibre density when the aforesaid liquid guide layer is dry is preferably more than or equal to 0.005g/cm 3, smaller or equal to 0.02g/cm 3
The aforesaid liquid guide layer under moisture state, apply 980Pa (10g/cm 2) pressure the time fibre density be preferably in 0.005g/cm 3～0.04g/cm 3Scope in.
After the aforesaid liquid guide layer pulled out from stock reel, by heat treated, recover volume, density can reach in the above-mentioned scope.If in above-mentioned density range, when the aforesaid liquid guide layer is subjected to from the extruding force of user health, also high voidage can be arranged, and above-mentioned extruding force is when being released, the volume of aforesaid liquid guide layer restores easily.Can utilize deadweight to see through the aforesaid liquid guide layer from the absorbed repeatedly liquid of top flat, and, before being absorbed by the absorption layer, be maintained in the space.Therefore, prevent that easily liquid from spreading on a large scale in top flat.And because the aforesaid liquid guide layer plays a role as the cushion of mitigation with the contact pressure of user skin with top flat, therefore, the soft feeling of absorbent commodity increases, and can more cosily use.
The aforesaid liquid guide layer is formed by hot-wind nonwoven cloth or the air-laid nonwoven fabrics that chemical fibre constitutes.
Above-mentioned non-woven fabrics can be folded into many and form the aforesaid liquid guide layer overlappingly.
If folding like this non-woven fabrics forms the aforesaid liquid guide layer, then can make the middle absorbent zone fluffy, the middle absorbent zone can more flexibly contact with the Excretory organ of user.
The present invention is particularly suitable for being close to the menstruation sanitary towel of user pudendum type.In recent years, the menstruation that middle body swells, is close to user pudendum type is increased to some extent with sanitary towel.But in order to absorb menses, even vagina is close on the surface, menses might spread on the surface.In this case, the part beyond the vagina of user health is made dirty by menses, has uncomfortable sensation maybe will take time and wipes menses.Among the present invention, because the diffusion of the liquid on the layer on sanitary towel surface and approaching surface is very little, therefore, except pudendum, the health of user is made dirty by menses hardly.Therefore, the present invention is good as the menstruation of the pudendum closing-type of central uplift with sanitary towel.
That is, absorb not from the menses of vaginal orifice diffusion owing to can see through, therefore except pudendum, the health of user is made dirty by menses hardly.Like this, be not easy to make user to feel uncomfortable, in addition, be not easy to make user to take time and wipe menses.And because the diffusion of lip-deep liquid is little, therefore the user of wanting to change sanitary towel can not felt following uneasiness, and promptly health is made dirty by menses, or menses spill to the outside of sanitary towel.
Description of drawings
By the accompanying drawing of following detailed description and the of the present invention suitable embodiment enclosed, can understand the present invention in more detail, but not limit the present invention, just for convenience of explanation and understand.
Fig. 1 is sanitary towel is used in expression as the menstruation of the absorbent commodity of first embodiment of the invention a axonometric chart.
Fig. 2 is the vertical view that sanitary towel is used in menstruation shown in Figure 1.
Fig. 3 is the profile that the cross central line of sanitary towel is used in menstruation illustrated in figures 1 and 2.
Fig. 4 A is the expansion profile in middle absorbent zone, and Fig. 4 B is the expansion profile of auxiliary absorption region.
Fig. 5 is the profile that the expression menstruation in use is out of shape with sanitary towel.
Fig. 6 is the expansion vertical view of the express liquid pattern that sees through the hole.
Fig. 7 is the vertical view of the menstruation of expression second embodiment of the invention with sanitary towel.
Fig. 8 is the vertical view of the menstruation of expression third embodiment of the invention with sanitary towel.
Fig. 9 is the vertical view that sanitary towel is used in the menstruation of the band flank of expression four embodiment of the invention.
Figure 10 is the vertical view of the menstruation of expression fifth embodiment of the invention with sanitary towel.
Figure 11 is the vertical view of the menstruation of expression sixth embodiment of the invention with sanitary towel.
Figure 12 A, Figure 12 B have the half-sectional view of the menstruation of leakproof wall with sanitary towel.
Figure 13 is the manufacture method key diagram of menstruation of the present invention with sanitary towel.
Figure 14 is the key diagram of other heater blocks of expression.
Figure 15 is the key diagram of other heater blocks of expression.
Figure 16 is the key diagram of other heater blocks of expression.
The specific embodiment
Following with reference to accompanying drawing, be elaborated with regard to ideal embodiment of the present invention.In order intactly to understand the present invention, enumerated a lot of distinctive details in the following description, still,, also can form the present invention even without these distinctive details, this should be self-evident with the dealer.In addition, the present invention then is not elaborated with regard to well-known structure for fear of unnecessary not clear point.
Fig. 1 is the axonometric chart that surface that expression will contact with user with sanitary towel as the menstruation of the absorbent commodity of first embodiment of the invention makes progress, and Fig. 2 is the vertical view of menstruation usefulness sanitary towel 1.Fig. 3 sees the profile of the menstruation shown in Fig. 1 with the section on the cross central line Ox-Ox of sanitary towel 1 from III-III to apparent direction, Fig. 4 A, Fig. 4 B are the expanded view of different piece of the profile of Fig. 3, Fig. 5 is the profile that the expression menstruation in use is out of shape with sanitary towel 1, and Fig. 6 represents that the liquid that forms from the teeth outwards sees through the expansion vertical view of hole Pareto diagram.
Shown in the vertical view of Fig. 1, menstruation is the depth shape with sanitary towel 1, has 1a of right side edge portion and the 1b of left side edge portion, the circular-arc 1c of front edge portion and the 1d of back edge portion of the linearity of longitudinal extension.As shown in Figure 2, menstruation makes longitudinal centre line Oy-Oy between middle left-right symmetric shape with sanitary towel 1, in addition, makes cross central line Ox-Ox between middle front and back symmetric shape.
Shown in the profile of Fig. 3, this menstruation with the structure of sanitary towel 1 be the egative film 2 of lamination liquid impermeability, the top flat 6 of the absorbed layer, liquid guide layer 5 and the permeability for liquids that constitute by lower floor's absorber 3 and upper strata absorber 4.
With in the sanitary towel 1, be formed with the pressure contact portion 9 that surrounds the regulation area in this menstruation.As shown in Figure 2, this pressure contact portion 9 is to have certain width W a, the continuous extension in elongated, belt-shaped ground.This pressure contact portion 9 has right side pressure contact portion 9a and left side pressure contact portion 9b and the place ahead pressure contact portion 9c and rear pressure contact portion 9d, right side pressure contact portion 9a and left side pressure contact portion 9b be from longitudinal centre line Oy-Oy on the position of leaving left and right sides predetermined distance to longitudinal extension, the place ahead pressure contact portion 9c and rear pressure contact portion 9d from the position of cross central line Ox-Ox predetermined distance before and after leave to horizontal extension.Right side pressure contact portion 9a and left side pressure contact portion 9b and the place ahead pressure contact portion 9c and rear pressure contact portion 9d are continuous mutually, right side pressure contact portion 9a and left side pressure contact portion 9b are towards longitudinal centre line Oy-Oy bending, and the place ahead pressure contact portion 9c and rear pressure contact portion 9d are towards the direction bending that deviates from cross central line Ox-Ox.
And in the present embodiment, it is the left-right symmetric shape between the centre that above-mentioned pressure contact portion 9 makes longitudinal centre line Oy-Oy, in addition, makes cross central line Ox-Ox symmetric shape before and after the centre is.
As shown in Figure 2, above-mentioned lower floor absorber 3 has the 3a of right side edge portion and the 3b of left side edge portion and 3c of front edge portion and the 3d of back edge portion, 3a of right side edge portion and the 3b of left side edge portion are towards longitudinal centre line Oy-Oy bending, and 3c of front edge portion and the 3d of back edge portion are towards the direction bending that deviates from cross central line Ox-Ox.Above-mentioned upper strata absorber 4 has the 4a of right side edge portion and the 4b of left side edge portion and 4c of front edge portion and the 4d of back edge portion, 4a of right side edge portion and the 4b of left side edge portion and the above-mentioned right side edge 3a of portion and the 3b of left side edge portion are similarly crooked, and 4c of front edge portion and the 4d of back edge portion and the 3c of front edge portion and the 3d of back edge portion are similarly crooked.See that from the top down upper strata absorber 4 has the roughly the same circumferential edges of peripheral contour line 9B with pressure contact portion 9.
And the area of above-mentioned upper strata absorber 4 is greater than the area that is surrounded by the peripheral contour line 9B of above-mentioned pressure contact portion 9, less than above-mentioned lower floor absorber 3.In the present embodiment, lower floor's absorber 3 and upper strata absorber 4 all be make longitudinal centre line Oy-Oy between middle, be the left-right symmetric shape, in addition, make cross central line Ox-Ox between middle, be the front and back symmetric shape.
Lower floor's absorber 3 and upper strata absorber 4 and top flat 6 are added along above-mentioned pressure contact portion 9 (promptly always along right side pressure contact portion 9a and left side pressure contact portion 9b, the place ahead pressure contact portion 9c and rear pressure contact portion 9d) always is pressed into concavity, is mutually combined on this part.
Aforesaid liquid guide layer 5 is air-laid nonwoven fabrics etc. as described later, form by low-density non-woven fabrics, this low-density non-woven fabrics is that the chemical fibre quilt is bonding mutually, each fiber forms the skeleton that extends to stereo directional, between this fiber, form trickle space, with folding two-layer above formation of this non-woven fabrics.In the present embodiment, above-mentioned non-woven fabrics is folding at two fold lines, forms three layers.
See that from the top down it is rectangles that non-woven fabrics is folded into three layers of aforesaid liquid guide layer 5 of making, the width W1 between 5a of longitudinal extending side edge portion and the lateral edge portion 5b, the length between the 5c of end margin portion of horizontal expansion and the 5d of end margin portion is represented with L1.As shown in Figure 2, the area of aforesaid liquid guide layer 5 is more much smaller than the area that is surrounded by the contour line 9A of the inboard of above-mentioned pressure contact portion 9, and edge part 5a, 5b, 5c and 5d leave the inboard of above-mentioned pressure contact portion 9, do not lean against on the above-mentioned pressure contact portion 9.
This menstruation is middle absorbent zones 11 with sanitary towel 1 by the contour line 9A area surrounded of the inboard of above-mentioned pressure contact portion 9.On this middle absorbent zone 11, lower floor's absorber 3 and upper strata absorber 4 are superimposed on egative film 2, and the aforesaid liquid guide layer 5 that does not lean against on the above-mentioned pressure contact portion 9 is superimposed, and its surface is covered by top flat 6.
Shown in Fig. 1 and Fig. 4 A, in above-mentioned middle absorbent zone 11, a plurality of liquid infiltration hole 15 is arranged on the top flat 6 regularly.Shown in Fig. 4 A, aforesaid liquid permeability hole 15 connects top flat 6, is formed extended at both sides at liquid guide layer 5.And above-mentioned top flat 6 and liquid guide layer 5 all contain the thermoplasticity fiber, and aforesaid liquid permeability hole 15 forms by the screw that is thrust after the heating.At this moment, above-mentioned thermoplasticity fiber is by bonding, and on the part of aforesaid liquid permeability hole 15, top flat 6 and liquid guide layer 5 are bondd mutually.Therefore, do not need to smear bonding agent, otherwise liquid has relation from top flat 6 to the importing of liquid guide layer 5 and minimizing that can permeable areas to the boundary face of top flat 6 and liquid guide layer 5.
On the boundary face of above-mentioned upper strata absorber 4 and liquid guide layer 5, by reticulated by smearing, the hot-melt type adhesive of pectination or helical form etc., above-mentioned upper strata absorber 4 and liquid guide layer 5 are bonded.Top behind overlapping upper strata absorber 4 and the lower floor's absorber 3 and followingly covered by hydrophilic thin paper (do not have diagram), do not exist bonding agent this moment on the interface of upper strata absorber 4 and lower floor's absorber 3.Lower floor's absorber 3 is bonding by the heat molten type bonding agent that spreads upon on the boundary face with egative film 2.
At least one side's outside of the contour line 9B in the outside of above-mentioned pressure contact portion 9, that have above-mentioned lower floor absorber 3 and upper strata absorber 4 zone is auxiliary absorption region 12.Should assist absorption region 12, the very near outside at above-mentioned contour line 9B has heavy section 12a, this heavy section 12a is that the upper strata absorber 4 that overlaps on lower floor's absorber 3 is covered by top flat 6, in the outside of heavy section 12a, has the heavy section 12b that lower floor's absorber 3 is covered by top flat 6.In above-mentioned auxiliary absorption region 12, do not make above-mentioned lower floor absorber 3 and upper strata absorber 4 between the centre, egative film 2 and top flat 6 are bonding by the heat molten type bonding agent.
As depicted in figs. 1 and 2, the heavy section 12a of above-mentioned auxiliary absorption region 12 surrounds above-mentioned pressure contact portion 9 ground and forms, and above-mentioned heavy section 12b surrounds above-mentioned heavy section 12a ground and forms.
Below, describe with regard to the ideal material of each component parts.
Top flat 6 preferably uses each chemical fibre to be carried out the hot-wind nonwoven cloth of hot adhesion by hot blast.It is the dimethyl ester (PET) that contains 1.1 quality % titanium oxides that chemical fibre can use core, and crust is the outer sheath composite synthetic fibers of the core of polyethylene (PE).The surperficial sliding of sheath composite synthetic fibers is good outside the core of above-mentioned core interpolation titanium oxide, the good hand touch of top flat 6.In addition, if top flat 6 uses hot-wind nonwoven cloth fluffy, have the space between fiber then the good penetrability of liquid.
The outer sheath composite synthetic fibers of core that form above-mentioned top flat 6 are carried out following hydrophilic and handle, it is the coating of adding hydrophilic interfacial agent such as interfacial agent before the spinning or after spinning, carrying out above-mentioned hydrophilic interfacial agent, and, preferably and carry out the water proofing property fiber mixing that the coating of the interfacial agent of water proofing property is made after the spinning.By mixing this water proofing property fiber, have the effect that prevents liquid diffusion on top flat 6.In addition, mix under the situation of water proofing property fiber, shown in Fig. 4 A, be preferably in and form a plurality of liquid infiltration hole 15 on the top flat 6, liquid permeates top flat 6 easily.The mass ratio of top flat 6 preferably contains 5～30% above-mentioned water proofing property fibers relatively.If surpass 30%, the surface of top flat 6 waterproof too then, the liquid infiltration ability drop of top flat 6.In addition, if less than 5%, prevent that then the effect of liquid diffusion from reducing.
In addition, top flat 6 also can be some bonded nonwoven or the spunbond shape non-woven fabrics that chemical fibre forms, and perhaps also can be the aspunlacednonwovenfa,ric that contains hydrophilic fibre such as artificial silk and above-mentioned water proofing property fiber.Perhaps also can be to form the resin film in a plurality of liquid infiltration hole or on the stacking material of resin film and non-woven fabrics, form a plurality of liquid infiltration hole.
In any case the weight per unit area of top flat 6 is preferably in 15～60g/m 2Scope.If less than above-mentioned value, then can not obtain sufficient surface strength, might under moisture state, produce damaged.In addition, if surpass above-mentioned scope, then top flat 6 becomes very hardly, might in use produce uncomfortable sensation.In addition, the infiltration of the higher menses of ratio of viscosities when promoting menstruation, the density of top flat 6 is preferably in 0.12g/m 3Below.
As Fig. 4 A and shown in Figure 6, the bore size Hd of aforesaid liquid permeability hole 15 on the surface of top flat 6 is 0.5～2.0mm, and vertically arrangement pitches Hy is 2～5mm, and transversely arranged spacing Hx is that 1～4mm ground zigzag is arranged, and Hy is longer than Hx.
Aforesaid liquid guide layer 5 is made of the chemical fibre of handling, engaging with the three-dimensional skeleton that has the space between fiber through hydrophilic, and it is the coating of adding interfacial agent or carrying out interfacial agent before spinning after spinning that this hydrophilic is handled.Owing at liquid guide layer 5 space is set, the liquid that therefore is penetrated into top flat 6 relies on deadweight to enter easily in the above-mentioned space, and the absorbed layer below being positioned at it can remain on liquid in the space before absorbing.
The hot-wind nonwoven cloth with liquid infiltration function that is formed by the chemical fibre of handling through hydrophilic is arranged or have the liquid infiltration function and the air-laid nonwoven fabrics of liquid maintenance function as what the liquid guide layer 5 of said structure can exemplify.
Above-mentioned hot-wind nonwoven cloth can use core, and (for example fibrousness is 4.4dtex as the outer integumentary pattern composite synthetic fibre of the core of the eccentric type of polyethylene (PE) as polypropylene (PP), crust, fiber is long to be 50mm) fibrous layer, at this, the outer skin zone of the outer integumentary pattern composite synthetic fibre of above-mentioned each core by hot blast by heat bonding.
Perhaps, it is that (for example fibrousness is 2.2dtex to dimethyl ester (PET), the crust that contains titanium oxide 1.1 quality % as the outer integumentary pattern composite synthetic fibre of the core of polyethylene (PE) that above-mentioned hot-wind nonwoven cloth can use core, fiber is long to be 44mm) fibrous layer, at this, the outer skin zone of the outer integumentary pattern composite synthetic fibre of above-mentioned each core by hot blast by heat bonding.
The density range of the hot-wind nonwoven cloth that uses as aforesaid liquid guide layer 5 is more than or equal to 0.005g/cm 3, at 0.1g/cm 3Scope, preferably the above-mentioned hot-wind nonwoven cloth of pulling out from stock reel is heat-treated, recover to use as liquid guide layer 5 behind the volume.
For example, by at 115～300 ℃, be preferably under 130～200 ℃ (for example use 135 ℃ hot blast 1 minute) and heat-treat, can make the thickness of above-mentioned hot-wind nonwoven cloth increase by 1.2～4 times.
Hot-wind nonwoven cloth after Overheating Treatment is recovered volume preferably cools off.The volume that recovers through Overheating Treatment can be intactly kept by this chilling, low-density hot-wind nonwoven cloth can be obtained with resiliency.
Density after the volume of above-mentioned hot-wind nonwoven cloth recovers is lower than above-mentioned upper strata absorber 4 and top flat 6, under drying regime, is preferably in 0.005g/cm 3～0.02g/cm 3Scope in.If density is less than above-mentioned scope, then interfibrous space is too small, and liquid is difficult to see through top flat 6 by deadweight and enters above-mentioned space, worsens from the menses guiding function of top flat 6 to upper strata absorber 4.In addition, if surpass above-mentioned scope then the space is excessive, the frame strength that extends to the stereo directional of fiber reduces since with the contact pressure of the health of user, volume is destroyed easily.
In addition, the above-mentioned hot-wind nonwoven cloth after volume recovers under moisture state, apply 980Pa (10g/cm 2) pressure the time density be preferably in 0.005g/cm 3～0.04g/cm 3Scope in.
Each thickness of opening of above-mentioned hot-wind nonwoven cloth after volume recovers is 1.5mm～3mm under drying regime and moisture state, is preferably 2mm～3mm.Under moisture state, apply 980Pa (10g/cm 2) pressure the time thickness be 0.5mm～2mm, be preferably 0.5mm～1.5mm.Remove the thickness behind the above-mentioned pressure, when returning to pressurization more than 1.5 times for ideal, preferably more than 1.8 times.The most handy many above-mentioned hot-wind nonwoven cloths form liquid guide layer 5.
In addition, thickness under above-mentioned drying regime and the moisture state and density and moisture state down and the mensuration of thickness when applying above-mentioned pressure and density carry out according to the assay method of following (Embodiment B) (11).
In such liquid guide layer 5, though at liquid by during applying repeatedly, played effect from the pressure of user health, also can keep the space, can in liquid guide layer 5, guide and keep liquid, prevent that liquid from refluxing to top flat 6.In addition, when being alleviated, volume can be recovered immediately, the function of the liquid that infiltration applied repeatedly can be kept for a long time from the pressure of user health.
The weight per unit area of liquid guide layer 5 is at 15～300g/m 2Scope be ideal, be preferably in 20～100g/m 2If in above-mentioned scope, the liquid of liquid guide layer 5 is shifted to absorbed layer, and during liquid was absorbed by the absorption layer, the space in the liquid guide layer 5 can keep liquid.
The said flow that liquid guide layer 5 uses becomes the manufacture method of net non-woven fabrics as follows, the fiber that is about to after the thermoplastic resin fiber mixing of hydrophilic fibre such as natural fiber or regenerated celulose fibre and chemical fibre floats in the air, with above-mentioned fiber recovery after carrying out lamination on the drainage screen, carry out heat treated, make the surface melting of above-mentioned thermoplastic resin fiber, make thermoplastic resin fiber and hydrophilic fibre carry out thermal welding.For example, as hydrophilic fibre, use wood pulp, artificial silk, acetate rayon, paper pulp native cellulose fibre, China ink in addition to fill in mercerising processingization (マ one セ Leization) paper pulp, crosslinked paper pulp etc.Chemical fibre uses core to be the outer hide fiber of the core of polyethylene (PE) (for example fibrousness is 1.7dtex, and fiber is long to be 13mm) as polypropylene (PP), crust.
In addition, above-mentioned fiber also can be bonding with the resin binder of latex type.
This air-laid nonwoven fabrics also is that each chemical fibre or above-mentioned hydrophilic fibre and chemical fibre are engaged, and is formed on the cubic cage that has the space between fiber.When this air-laid nonwoven fabrics is used as liquid guide layer 5, similarly has the liquid utilization from the liquid infiltration function that reenters in the space with hot-wind nonwoven cloth.In addition, because air-laid nonwoven fabrics contains hydrophilic fibres such as natural fiber or regenerated celulose fibre, therefore, utilize hydrophilic interaction, the liquid that can be trapped in top flat 6 is introduced liquid guide layer 5.
After this air-laid nonwoven fabrics was pulled out from stock reel, preferably also by 100～300 ℃, preferably 130～200 ℃ heat was carried out the heat treatment about 1 minute, recovers volume.Density when using dry under the situation of air-laid nonwoven fabrics, when moistening and the thickness of the density during pressurization, individual non-woven fabrics, when moistening and the ideal range of the thickness during pressurization, the thickness when removing pressurization, weight per unit area etc. identical with above-mentioned hot-wind nonwoven cloth.
Aforesaid liquid guide layer 5 also can use following non-woven fabrics, promptly handles fleece by method for makings such as needle point method and Ha イ ロ Off ト methods, and it is heat-treated the non-woven fabrics that recovers volume.In addition, liquid guide layer 5 is not limited only to non-woven fabrics, also can use have three-dimensional skeleton, by applying the long-pending other materials that recovers of hot body, urethane etc. for example.
In addition, can heat-treat, make it recover volume, also can the part sheet material be heat-treated, on liquid guide layer 5, stay the part of not recovering volume the sheet material integral body of the above-mentioned hot-wind nonwoven cloth of liquid guide layer 5 or air-laid nonwoven fabrics etc.For example, use under the situation of menstruation with the liquid guide layer 5 of vertical length of sanitary towel 1, can only heat the place ahead part, the formation low-density of relative vaginal orifice, the part of the ditch of the anus at rear or buttocks is not recovered volume relatively, becomes the state higher than the place ahead partial density.Like this, the place ahead part at relative vaginal orifice can shift the menses that apply in a large number in the short time rapidly to absorbed layer.On the one hand, in highdensity rear part, the fewer liquid that is applied on the top flat can be sucked rapidly.Perhaps can the place ahead part not heat-treated on the contrary yet, only low-density is heat-treated, become to the rear part.
The fibrousness that constitutes the fiber of aforesaid liquid guide layer 5 gets final product at 1.8～33dtex, volume when the extruding force from the user health is released is restorative good, and in order not produce backflow phenomenon (rewetting profit phenomenon), above-mentioned fibrousness is preferably in 2.4～11dtex.
In the present embodiment, be folded into three layers of non-woven fabrics and form liquid guide layer 5.At this, the fibre density height of the non-woven fabrics that the state that with aforesaid liquid guide layer 5 identical weight per unit area is arranged, does not fold is made down, thickness is also little in addition, and the space in the non-woven fabrics is little.Therefore, such non-woven fabrics utilizes its deadweight that the function that above-mentioned liquid guides in above-mentioned space is reduced.In addition, as shown in Figure 3, in the present embodiment, two fold lines that are folded into trilaminar non-woven fabrics are towards the vertical setting of menstruation with sanitary towel, and are consistent with the lateral edges 5a and the lateral edges 5b of liquid guide layer 5.If folding like this, liquid guide layer 5 is out of shape, makes the middle absorbent zone 11 with liquid guide layer 5 continue to be close to vaginal orifice easily.
The folding number of plies of the non-woven fabrics on the liquid guide layer 5 is not limited only to three layers, and is two-layer or can more than four layers.Because liquid enters the space between nonwoven layer after folding, therefore, the number of plies is many more more can be with liquid to liquid guide layer 5 guiding.But if folding times is too much, the operation that forms liquid guide layer 5 becomes complicated, and productivity reduces.In addition, if the overlapping number of plies is too much, form too much space, liquid might be trapped on this part.
Therefore, as the overlapping number of plies of non-woven fabrics, on the guiding function and production efficiency of liquid, preferably two-layer to about five layers.For making liquid guide layer 5 that the space of suitable morphotropism and right quantity be arranged, best overlapping number is three layers.
Also can determine the rectangular pieces of W1 * L1 from above-mentioned non-woven fabrics, for example overlapping three layers form aforesaid liquid guide layer 5.Eclipsed like this non-woven fabrics can be brought into play identical functions with above-mentioned folding non-woven fabrics aspect density and morphotropism.But not overlapping with pressure contact portion 9 in order to make liquid guide layer 5, each rectangular width W 1 must be very little.Thin like this rectangle is in menstruation intractable in the manufacturing process of sanitary towel 1.Therefore, preferably non-woven fabrics is folded into the size formation liquid guide layer 5 of W1 * L1.
Upper strata absorber 4 is layered products of the paper pulp of comminution pulp, China ink plug mercerising processingization paper pulp, crosslinked paper pulp etc., and weight per unit area for example is 230g/m 2Material form.Lower floor's absorber 3 can use the layered product of the above-mentioned paper pulp of the high absorption polymer that contains 1.5～2.0 quality %.The weight per unit area of lower floor's absorber 3 is at below 80% of upper strata absorber 4.For example the weight per unit area of lower floor's absorber 3 is 160g/m 2Under above-mentioned upper strata absorber 4 and the lower floor's absorber 3 eclipsed states, cover its top and bottom with thin paper (not having diagram).In addition, lower floor's absorber 3 is embossed with the lattice-like pattern as shown in Figure 1.
The density of above-mentioned upper strata absorber 4 and lower floor's absorber 3 is preferably in 0.1～0.6g/m 3Scope.If less than above-mentioned scope, then menstruation is low excessively with the rigidity of sanitary towel 1, might produce fold or distortion in the use.In addition, if exceed above-mentioned scope, then menstruation is too high with the rigidity of sanitary towel 1, and the health to user has uncomfortable sensation easily.But as mentioned above, by 3 embossing of lower floor's absorber are formed the lattice-like pattern, in above-mentioned density range, the density of lower floor's absorber 3 is higher than upper strata absorber 4.
For the liquid that will be directed into liquid guide layer 5 is attracted to upper strata absorber 4 easily, the density of upper strata absorber 4 is ideal more than the twice of the density of liquid guide layer 5, is preferably in more than 5 times in addition.
In addition, egative film 2 is sheets of liquid impermeability and aeration, is polyethylene (PE) thin film that is formed with trickle passage or polypropylene (PP) thin film etc.For example, by mixed C aCO in above-mentioned resin 3, BaSO 4Deng inorganic filler, carry out prolonged treatmently, trickle passage suitably disperses to form, improves aeration on thin film.The thickness of thin film is about 15～50 μ m.Perhaps also can be with the material of thermoplastic resin after non-woven fabrics carries out lamination.
As shown in Figure 3, in the outside of above-mentioned egative film 2, pressure-sensitive adhesive layer 7 is smeared with the continuous extension strip shape of vertical quilt of sanitary towel 1 in menstruation with the width of regulation.Under the state before using, above-mentioned pressure-sensitive adhesive layer 7 is stripped from sheet (not having diagram) covering protection.
Above-mentioned pressure contact portion 9 is processed to form by the embossing of using warm-up mill.In detail, under lower floor's absorber 3, upper strata absorber 4 and top flat 6 eclipsed states, the surface is bumped below lower floor's absorber 3 for planar cylinder, warm-up mill with embossed pattern protuberance bumps on top flat 6, and lower floor's absorber 3, upper strata absorber 4 and top flat 6 are pressurizeed by raised part and heat.Its result, the width dimensions that film like is solidified, become in the thermoplasticity fiber that contains on the top flat 6 fusing is the 9D of fusion portion of δ, as shown in Figure 2, the non-fusion 9E of portion is arranged, left to pressure contact portion 9 off and between the adjacent fusion 9D of portion.Just at the 9D of fusion portion, absorbed layer is not compressed by brute force yet on the non-fusion 9E of portion, and density is higher than the zone beyond the pressure contact portion 9.
After pressure contact portion 9 is formed like this, egative film 2 is installed in the downside of above-mentioned lower floor absorber 3.
In the present embodiment, the above-mentioned fusion 9D of portion is formed to the wire of menstruation with the vertical and horizontal twocouese inclination of sanitary towel 1.The width dimensions δ of the above-mentioned fusion 9D of portion for example is 0.2～1.5mm, and the spacing P of the above-mentioned fusion 9D of portion for example is 1～5mm.In addition, the width W a of pressure contact portion 9 is about 2～4mm.
As mentioned above, in order suitably to form 9D of fusion portion and the non-fusion 9E of portion, preferably the temperature with above-mentioned warm-up mill is set at more than 120 ℃, with the scope of the pressure setting between roller at 980～2450Pa.If form pressure contact portion with above-mentioned temperature and pressure, then with underwear be placed on the health of user, when two sides are subjected to the pressure of huckle, as shown in Figure 5, on the part of the right side of pressure contact portion 9 pressure contact portion 9a and left side pressure contact portion 9b, menstruation is crooked easily with sanitary towel 1.In addition, if the hypertonia that embossing forms does not produce problems such as fracture on the part of the 9D of fusion portion.
In addition as mentioned above, in middle absorbent zone 11, each edge of liquid guide layer 5 is in the inboard of pressure contact portion 9, and liquid guide layer 5 does not lean against on the pressure contact portion 9.If liquid guide layer 5 leans against on the pressure contact portion 9, then since form the non-woven fabrics of liquid guide layer 5 be fluffy, form three-dimensional skeleton by fiber, therefore the adhesive strength of the interlayer on pressure contact portion 9 reduces.In this case, on pressure contact portion 9, top flat 6 be not fixed with upper strata absorber 4 or fix a little less than, can not stop effectively at above-mentioned pressure contact portion 9 be applied on the middle absorbent zone 11, to the menses of top flat 6 or upper strata absorber 4 internal diffusion.
In addition, if a little less than the adhesive strength on the pressure contact portion 9, then middle absorbent zone 11 distortion, very difficult outstanding between the crotch of user, in addition, each the fault position on middle absorbent zone 11 and its periphery produces distortion easily on top flat 6 or liquid guide layer 5.Its result is difficult to make middle absorbent zone 11 to be close to vaginal orifice, can not reach one of initial purpose of fixed point ground absorption liquid in middle absorbent zone 11.
On the one hand, if pressure contact portion 9 is not formed against liquid guide layer 5, then middle absorbent zone 11 easy deformation can portion be given prominence to between the hip thigh of user, and vaginal orifice flexibly is close in middle absorbent zone 11.In addition, can prevent the diffusion of liquid effectively by pressure contact portion 9.
Below, describe with regard to the ideal dimensions of each component parts.The menstruation of first embodiment is the common size of using daytime with sanitary towel 1, and the width on the cross central line Ox-Ox is 80mm, and the length on the longitudinal centre line Oy-Oy is about 210mm.
The middle absorbent zone 11 that is surrounded by above-mentioned pressure contact portion 9 needs fully big area for the vaginal orifice of being close to the women, and width W 2 is in the scope of 25mm～50mm, and size L2 is the scope of 50mm～110mm longitudinally.In addition, the anus of user is rearward extended, surpasses in the preferably above-mentioned middle absorbent of the elongated that is applicable to ight zone 11 shown in Figure 8, in this case, is limited to about 280mm on the longitudinal size in middle absorbent zone 11.
The width W 1 of aforesaid liquid guide layer 5 and length L 1 are to set according to the area in above-mentioned middle absorbent zone 11, but, be necessary between the contour line 9A of the inboard of the edge part of liquid guide layer 5 and pressure contact portion 9, to separate interval to a certain degree, for example, the interval of the edge part of liquid guide layer 5 and above-mentioned contour line 9A, promptly (W2-W1)/2 and (L2-L1)/2 ideal be the scope of 1～10mm, be preferably in 2～6mm.If in above-mentioned scope, when then forming pressure contact portion 9, there is not danger against aforesaid liquid guide layer 5.
Width on the cross central line Ox-Ox of the upper strata absorber 4 in the above-mentioned embodiment is 55mm, and the length on the longitudinal centre line Oy-Oy is about 120mm.In addition, the width on the cross central line Ox-Ox of lower floor's absorber 3 is 75mm, and the length on the longitudinal centre line Oy-Oy is about 180mm.The width W b of heavy section 12a in the auxiliary absorption region shown in Figure 3 is preferably in about 3～10mm.
When using this menstruation with sanitary towel 1, the stripping film of the quick bond layer 7 of protection sense of at first tearing by feeling quick bond layer 7, is bonded in menstruation the inboard of the crotch portion 20 of underwear with sanitary towel 1.
Menstruation is placed under the state on the health of user with underwear with sanitary towel 1, and above-mentioned crotch portion 20 and menstruation are subjected to huckle clamping force from both sides with sanitary towel 1.Use in the sanitary towel 1 in above-mentioned menstruation, for longitudinal centre line Oy-Oy, owing to form the right side pressure contact portion 9a and the left side pressure contact portion 9b of longitudinal extension in the horizontal symmetrically, therefore above-mentioned clamping force is done the time spent, the effect that menstruation is played hinge with the above-mentioned right side pressure contact portion 9a and the left side pressure contact portion 9b of sanitary towel 1, menstruation is crooked as illustrated in fig. 5 in this hinge part with sanitary towel 1.
The liquid guide layer 5 that particularly is arranged on middle absorbent zone 11 does not lean against on the pressure contact portion 9, at pressure contact portion 9, only has lower floor's absorber 3 and upper strata absorber 4 between egative film 2 and top flat 6.Therefore, above-mentioned pressure contact portion 9 and its are very big with poor rigidity between the exterior domain and thickness difference, and menstruation is bent at right side pressure contact portion 9a and left side pressure contact portion 9b easily with sanitary towel 1.
At this moment, huckle to the right the clamping force of pressure contact portion 9a and left side pressure contact portion 9b effect have influence on middle absorbent zone 11.By this clamping force, middle absorbent zone 11 top crooked towards convex ground between the hip thigh portion of user, on middle absorbent zone 11, top flat 6 is close to vaginal orifice easily.At this moment, middle absorbent zone 11 not only has lower floor's absorber 3 and upper strata absorber 4, and has liquid guide layer 5, become fluffy, and, because liquid guide layer 5 is low density materials, therefore can flexibly be close to vaginal orifice.
The higher liquid of ratios of viscosities such as menses of discharging from vaginal orifice mainly imposes on top flat 6 in middle absorbent zone 11.Promptly this liquid sees through top flat 6 and imposes on liquid guide layer 5.That is, because liquid guide layer 5 has following structure, promptly chemical fibre is engaged, has the skeleton that extends to stereo directional and forms the space, and therefore, the liquid that utilizes its deadweight to see through top flat 6 is directed in the space of aforesaid liquid guide layer 5.And the liquid that is absorbed into liquid guide layer 5 like this is attracted by hydrophilic interaction and the capillarity that is positioned at the high upper strata absorber 4 of density below it, is absorbed and remains on upper strata absorber 4.And the liquid that is absorbed by upper strata absorber 4 is absorbed on the lower floor's absorber 3 that is held in place below this.
The ability height that aforesaid liquid guide layer 5 shifts liquid downwards, because liquid is maintained in the liquid guide layer 5 up to being absorbed by upper strata absorber 4, therefore, top flat 6 is not easy by hold-up in addition.Therefore, top flat 6 in use has been not easy moist feeling.
Because the posture that is seated etc., the extruding force that the body weight of user produces is under the situation of menstruation with sanitary towel's 1 effect, and this extruding force is stopped by top flat 6 and liquid guide layer 5.Can be used as cushion by low-density aforesaid liquid guide layer 5 that constitutes after recovering by the heat treatment volume plays a role.In addition,, also can keep high voidage, the function that therefore, can keep for a long time temporarily keeping, be absorbed by upper strata absorber 4 from the liquid of top flat 6 even the extruding force, the liquid guide layer 5 that apply from the user health are compressed.In addition, when being released from the extruding force of user health, aforesaid liquid guide layer 5 can recover volume effectively.
The water proofing property fiber performance that above-mentioned top flat 6 contains prevents the function of liquid diffusion.But because 6 spaces that can keep volume really, keep form in inside, even therefore contain above-mentioned water proofing property fiber, the liquid infiltration function of top flat 6 is also destroyed hardly.
In the present embodiment, shown in Fig. 4 A because form a plurality of perforation top flats 6, in the liquid infiltration hole 15 that liquid guide layer 5 extends, therefore, be applied to top flat 6 surfaces liquid 15 infiltrations from the liquid infiltration hole, be applied on the liquid guide layer 5.Therefore, be applied to liquid on the top flat 6 and utilize deadweight to drop to liquid guide layer 5 easily, like this, be more prone to prevent that liquid residue is on top flat 6 or the diffusion of liquid.
Like this,, see through top flat 6 at the liquid that is applied to middle absorbent zone 11 central parts by the concentrated area repeatedly and be applied in liquid guide layer 5 with in the sanitary towel 1 in this menstruation, liquid is not easy diffusion on top flat 6.In addition, because the density of liquid guide layer 5 is low, therefore the peritropous diffusion of liquid in liquid guide layer 5 can be suppressed, and so also can be suppressed at the diffusion of liquid on the top flat 6.
The liquid that sees through top flat 6 and liquid guide layer 5 is absorbed diffusion by upper strata absorber 4, is further absorbed diffusion by lower floor's absorber 3.But,,, therefore, be difficult to the color of affirmation from top flat 6 at the menses of upper strata absorber 4 internal diffusion with eyes owing between upper strata absorber 4 and the top flat 6 distance is arranged in middle absorbent zone 11.Like this, the diffusion of liquid on top flat 6 is limited, and sees that the menstruation in the use can not felt under the weather with the user on the surface of sanitary towel 1.
When the liquid that is applied to middle absorbent zone 11 spread in upper strata absorber 4 and lower floor's absorber 3 towards periphery, above-mentioned pressure contact portion 9 performances stoped the function of liquid diffusion.Promptly, propagate into upper strata absorber 4 and lower floor's absorber 3, concentrate on the non-fusion 9E of portion with the horizontal proliferation of sanitary towel 1, the liquid that arrives right side pressure contact portion 9a and left side pressure contact portion 9b to menstruation, and then propagate to the adjacent non-fusion 9E of portion, along right side pressure contact portion 9a and left side pressure contact portion 9b to menstruation vertically moving with sanitary towel 1.Therefore, the liquid that is fed into middle absorbent zone 11 is difficult to cross pressure contact portion 9 and propagates into auxiliary absorption region 12 around it.
In the auxiliary absorption region 12 in the outside in above-mentioned middle absorbent zone 11, shown in Fig. 4 B, heavy section 12a is set at the very near outside of pressure contact portion 9.Under the state of distortion shown in Figure 5, at ease easily the lower limb root of above-mentioned heavy section 12a (gang ぐ り) position in the labium majus outside.In addition, as shown in Figure 5, because pressure contact portion 9 buried between fluffy middle absorbent zone 11 and above-mentioned heavy section 12a, therefore, the high pressure contact portion 9 of density height, rigidity is not directly and the Body contact of user.Therefore, pressure contact portion 9 can not make the health of user feel the rigidity sense.
The menses that portion propagates between crotch are attached on the auxiliary absorption region 12 time, in addition, the menses of propagating to the surface in middle absorbent zone 11 are crossed pressure contact portion 9 and are arrived under the situation of assisting on the absorption region 12, the liquid captivation that this liquid forms by the capillarity that is positioned at the upper strata absorber 4 under the top flat 6 sees through top flat 6 rapidly and is absorbed by above-mentioned upper strata absorber 4.As mentioned above, in middle absorbent zone 11, because being difficult to cross pressure contact portion 9 by the liquid of upper strata absorber 4 or 3 absorptions of lower floor's absorber propagates to auxiliary absorption region 12, therefore, be difficult to occur in above-mentioned upper strata absorber 4 or lower floor's absorber 3 in above-mentioned auxiliary absorption region 12 by the situation of a large amount of hold-ups.In addition, even in auxiliary absorption region 12, the captivation of lower floor's absorber 3 and upper strata absorber 4 neither be so little.Therefore,, absorb rapidly, prevent the side leakage of liquid easily attached to the quilt of the liquid on the top flat 6 absorbed layer in its lower section in auxiliary absorption region 12.
In addition, in auxiliary absorption region 12 since the high upper strata absorber 4 of density be positioned at top flat 6 under, utilize the hydrophilic power and the capillarity of upper strata absorber 4, absorbed rapidly attached to the liquid on the top flat 6, therefore, this auxiliary absorption region 12 there is no need to be provided with the liquid infiltration hole.But, on this auxiliary absorption region 12, also can on top flat 6, form the liquid infiltration hole.
In addition, lower floor's absorber 3 is set in the vast scope in middle absorbent zone 11 and auxiliary absorption region 12, because these lower floor's absorber 3 weight per unit areas and thickness is little, have superabsorbent polymer in inside, therefore, the liquid of lower floor's absorber 3 keeps capacity big.Therefore,, on lower floor's absorber 3, can keep a large amount of liquid,, become the big absorber of absorptive capacity of liquid as whole menstruation sanitary towel 1 in middle absorbent zone 11 and auxiliary absorption region 12.
As mentioned above, with in the sanitary towel 1, be close to vaginal orifice easily in above-mentioned menstruation by the middle absorbent zone 11 that pressure contact portion 9 by zoning, is mainly accepted liquid.And on this middle absorbent zone 11, for the supply repeatedly of liquid, top flat 6 is not easy saturated, is not easy to spread liquid.Even arrive auxiliary absorption region 12 just in case the liquid that applies to middle absorbent zone 11 is crossed pressure contact portion 9, in auxiliary absorption region 12, also can be rapidly with this Liquid Absorption.
Fig. 7 to Figure 11 is expression other embodiments of the present invention.In these embodiments, the formation identical with above-mentioned first embodiment given identical symbol, omits its detailed explanation at this.
Fig. 7 is the 1A of sanitary towel is used in expression as the menstruation of the absorbent commodity of second an embodiment of the present invention vertical view.
This menstruation is that the shape of pressure contact portion 9 is different with the length of liquid guide layer 5 with the 1A of sanitary towel, and other formation and size etc. are all identical with sanitary towel 1 to menstruation shown in Figure 5 with Fig. 1.
With among the 1A of sanitary towel, pressure contact portion is only formed by right side pressure contact portion 9a and left side pressure contact portion 9b in menstruation shown in Figure 7, does not form menstruation shown in Figure 1 the place ahead pressure contact portion 9c and rear pressure contact portion 9d with sanitary towel 1.Above-mentioned menstruation shown in this right side pressure contact portion 9a and left side pressure contact portion 9b and Fig. 1 and Fig. 2 etc. similarly forms with sanitary towel 1.
This menstruation is with among the 1A of sanitary towel, because the right side pressure contact portion 9a and the left side pressure contact portion 9b of longitudinal extension are set in the left and right sides, the deformation state when being used in portion between the crotch of user is identical with Fig. 5.With among the 1A of sanitary towel, middle absorbent zone 11A is set between right side pressure contact portion 9a and left side pressure contact portion 9b in this menstruation, at the auxiliary absorption region 12A of the left and right sides arranged outside of right side pressure contact portion 9a and left side pressure contact portion 9b.The guiding function of the liquid on middle absorbent zone 11A and the auxiliary absorption region 12A is identical with auxiliary absorption region 12 with the middle absorbent regional 11 of sanitary towel 1 with above-mentioned menstruation with absorption function.
This menstruation with the 1A of sanitary towel also be make longitudinal centre line Oy-Oy between middle, be the left-right symmetric shape, make cross central line Ox-Ox between middle, be the front and back symmetric shape.And, from cross central line Ox-Ox to right side pressure contact portion 9a and the length L b of the front end of left side pressure contact portion 9b longer than the length L a of 5 the 5c of front edge portion from above-mentioned cross central line to liquid guide layer.Equally, from cross central line Ox-Ox to right side pressure contact portion 9a and the length of the rear end of left side pressure contact portion 9b longer than the length of 5 the 5d of back edge portion from above-mentioned cross central line to liquid guide layer.
And above-mentioned Lb-La it is desirable to be preferably in more than the 5mm more than the 3mm.
Use among the 1A of sanitary towel in the menstruation that constitutes like this, the menses that are applied to the central part of middle absorbent zone 11A, absorbed by upper strata absorber 4 and lower floor's absorber 3 by liquid guide layer 5 from top flat 6 from above-mentioned each absorber 3,4 when spread two sides, can stop its diffusion at above-mentioned right side pressure contact portion 9a and left side pressure contact portion 9b, each absorber 3,4 that is positioned on the auxiliary absorption region 12A is not easy by hold-up.
Fig. 8 is the 1B of sanitary towel is used in expression as the menstruation of the absorbent commodity of the 3rd an embodiment of the present invention vertical view.
This menstruation is identical with 1A with sanitary towel 1 with above-mentioned menstruation with the basic structure of the 1B of sanitary towel, and just whole size is different with the shape of pressure contact portion.
This menstruation is more much bigger with sanitary towel 1 and 1A than menstruation with the lengthwise of the 1B of sanitary towel.Menstruation has roomy rear part with the 1B of sanitary towel, because it in use is close to the buttocks of user, therefore generally is referred to as " buttocks protection portion ".
This menstruation has egative film, the absorber 3A of lower floor, upper strata absorber 4A, liquid guide layer 5A and top flat 6A with the 1B of sanitary towel, and these lengthwise is also big with sanitary towel 1 and 1A than menstruation.Menstruation has by longitudinally extending pressure contact portion 90 with the 1B of sanitary towel.Pressure contact portion 90 has right side pressure contact portion 90a, left side pressure contact portion 90b, the place ahead pressure contact portion 90c and the rear pressure contact portion 90d that middle absorbent zone 11B is formed with surrounding continuously.Pressure contact portion 90 also has a pair of pressure contact portion 90e, the 90f that prolongs towards the place ahead of the place ahead pressure contact portion 90c, and a pair of pressure contact portion 90g, the 90h that leave to the inside from right side pressure contact portion 90a, left side pressure contact portion 90b.And this place ahead prolongs pressure contact portion 90e, 90f along with add the earth towards leading section, mutual interval.The leading section of the place ahead prolongation pressure contact portion 90e, 90f is positioned at and leaves the position of menstruation with the edge part of sanitary towel.
The width that the each several part of above-mentioned pressure contact portion 90 shown in Figure 8 has regulation.But this pressure contact portion 90 is identical with embodiment shown in Figure 2, and the 9D of fusion portion of film like and the non-fusion 9E of portion alternately form along the extending direction of pressure contact portion.
In addition, aforesaid liquid guide layer 5A at above-mentioned middle absorbent zone 11B not against above-mentioned pressure contact portion 90 ground settings.And, form auxiliary absorption region 12B in the outside of this pressure contact portion 90.
This menstruation is with among the 1B of sanitary towel, because middle absorbent zone 11B is vertically very long, so this middle absorbent zone 11B can be at ease on the health of user from the vaginal orifice to the buttocks.At this, because menstruation is crooked easily with the part that sanitary towel prolongs pressure contact portion 90e, 90f forwardly, therefore, menstruation is at ease easily than vaginal orifice more near the mons pubes in the place ahead with sanitary towel.
In addition, because middle absorbent zone 11B is that starting point is crooked easily with inboard pressure contact portion 90h, 90g, therefore, the front region of middle absorbent zone 11B is at ease at vaginal orifice easily, and rear area is at ease in the ditch of buttocks easily.
And, because by being positioned at the liquid guide layer 5A of middle absorbent zone 11B, the menses that are applied on the top flat 6A can be directed to upper strata absorber 4A and the absorber 3A of lower floor, therefore, the menses that are applied to middle absorbent zone 11B are difficult to cross pressure contact portion 90 and are brought to auxiliary absorption region 12B by along top flat 6A diffusion.Therefore, even the menstruation rear part of the 1B of sanitary towel, i.e. the longitudinal length of buttocks protection part or transverse width are smaller or thin, also prevent menses spilling to the buttocks direction easily.
Though liquid guide layer 5A is very long, not against right side pressure contact portion 90a, left side pressure contact portion 90b, the place ahead pressure contact portion 90c and rear pressure contact portion 90d, and the place ahead prolongs pressure contact portion 90e, 90f, is not more preferably to be provided with against inboard pressure contact portion 90g, 90h.Therefore, can form above-mentioned each pressure contact portion with roughly same compressive state, whole menstruation is at ease on the health of user with the 1B of sanitary towel easy deformation ground.If especially liquid guide layer 5A is not leaned against above-mentioned inboard pressure contact portion 90g, the setting of 90h ground, then above-mentioned inboard pressure contact portion 90g, 90h can be formed roughly same compressive state, can be starting point with above-mentioned inboard pressure contact portion 90g, 90h, make the 11B bending of middle absorbent zone easily.
On the contrary, liquid guide layer 5A also can lean against on above-mentioned inboard pressure contact portion 90g, the 90h, for example, the thickness of liquid guide layer 5A is big, under the situation about forming by the high material of flexural rigidity, is starting point by utilizing above-mentioned inboard pressure contact portion 90g, 90h compressed liquid guide layer 5A, can make the middle absorbent zone 11B with liquid guide layer 5A with above-mentioned inboard pressure contact portion 90g, 90h, easily crooked as previously mentioned.
In addition, in the embodiment of Fig. 8, the place ahead also can be set especially prolong pressure contact portion 90e, 90f and inboard pressure contact portion 90g, 90h.
In addition, above-mentioned menstruation all is the shape that does not have flank in both sides of the edge portion with sanitary towel 1,1A, 1B, also can form from both sides of the edge portion to the outstanding flank in side on sanitary towel in above-mentioned menstruation.
Fig. 9 represents based on menstruation illustrated in figures 1 and 2 structure with sanitary towel 1, to form the 4th embodiment of above-mentioned flank as an example.
Fig. 9 is the menstruation 1C of sanitary towel that expression is provided with a pair of flank section 21,21 that centrage Ox-Ox transversely stretches out.With among the 1C of sanitary towel, egative film 2 has two protuberances of corresponding above-mentioned flank section 21,21, does not have such protuberance on top flat 6 in this menstruation, and 6a of right side edge portion and the 6b of left side edge portion extend along the base portion of flank section 21,21.And, in left and right sides portion, by hydrophobic non-woven fabrics or be emerging in the most surperficial through the sheet 22,22 that the non-woven fabrics of water-proofing treatment forms the liquid impermeability.Edge part 22a, the 22a of the inboard of this sheet 22,22 are on the position of leaving longitudinal centre line Oy-Oy certain distance, and in the outside of the outboard wheel profile 9B of above-mentioned pressure contact portion 9, top flat 6 is exposed at the zone of being clamped by edge part 22a, 22a.
Sheet 22,22 is bonded on the top flat 6 in the inboard of edge part 6a, 6b, in addition, is bonded on the above-mentioned egative film 2 in flank section 21,21.Be that above-mentioned flank section 21,21 and egative film 2 and above-mentioned 22 are bonding, liquid porous not on this part.
This menstruation is with among the 1C of sanitary towel, because the sheet 22,22 of aforesaid liquid impermeability is set at the outer both sides of auxiliary absorption region 12, therefore, can further prevent the side leakage of menses etc.In addition, flank section 21,21 is bonded in the outside of the crotch portion of underwear, therefore, can firmly fixes the menstruation 1C of sanitary towel in above-mentioned crotch portion by pressure-sensitive adhesive layer.
In addition, spread towards periphery because menses are difficult to cross pressure contact portion 9 from the middle absorbent zone 11 with liquid guide layer 5, so sheet 22,22 does not need high water proofing property.So flank section 21,21 does not need high water proofing property yet.And above-mentioned 22,22 does not need big weight per unit area.Even the weight per unit area of flank section 21,21 is little, the worry of side leakage is also little.
Figure 10 is the axonometric chart that the 1D of sanitary towel is used in the menstruation of the absorbent commodity of expression fifth embodiment of the invention.
This menstruation has pressure contact portion 190 with the 1D of sanitary towel, and its shape is different with the respective embodiments described above, and the menstruation beyond it comes down to identical with the basic structure of sanitary towel with first embodiment shown in Figure 2.
Above-mentioned pressure contact portion 190 similarly has the middle absorbent of encirclement zone 11 ground successive right side pressure contact portion 9a, left side pressure contact portion 9b, the place ahead pressure contact portion 9c and rear pressure contact portion 9d with pressure contact portion 9 shown in Figure 2, and the place ahead prolongs pressure contact portion 9e, 9f and the rear prolongs pressure contact portion 9g, 9h.Aforesaid liquid guide layer 5 is set in middle absorbent zone 11.
The place ahead prolongation pressure contact portion 9e is the further extension forwards of intersection from right side pressure contact portion 9a and the place ahead pressure contact portion 9c, and the place ahead prolongation pressure contact portion 9f is the further extension forwards of intersection from left side pressure contact portion 9b and the place ahead pressure contact portion 9c.At this, above-mentioned the place ahead prolongs the extended line that pressure contact portion 9e can be used as right side pressure contact portion 9a, and the place ahead prolongs the extended line that pressure contact portion 9f also can be used as left side pressure contact portion 9b.The place ahead prolongs pressure contact portion 9e and the place ahead prolongs pressure contact portion 9f along with the 1C of front edge portion that uses sanitary towel near menstruation, and leave longitudinal centre line Oy-Oy ground, the place ahead terminal of the place ahead prolongation pressure contact portion 9e and the place ahead prolongation pressure contact portion 9f is positioned at leaves the above-mentioned front edge 1c of portion and 1a of right side edge portion and the 1b of left side edge portion.
Rear prolongation pressure contact portion 9g is the further extension rearward of intersection from right side pressure contact portion 9a and rear pressure contact portion 9d, and rear prolongation pressure contact portion 9h is the further extension rearward of intersection from left side pressure contact portion 9b and rear pressure contact portion 9d.At this, above-mentioned rear prolongs the extended line that pressure contact portion 9g can be used as right side pressure contact portion 9a, and the rear prolongs the extended line that pressure contact portion 9h also can be used as left side pressure contact portion 9b.The rear prolongs pressure contact portion 9g and the rear prolongs pressure contact portion 9h along with the 1d of back edge portion that uses sanitary towel near menstruation, and leave longitudinal centre line Oy-Oy ground, the terminal on the rear of rear prolongation pressure contact portion 9g and rear prolongation pressure contact portion 9h is positioned at leaves the above-mentioned back edge 1d of portion, the 1a of right side edge portion and the 1b of left side edge portion.
Figure 11 is the vertical view of the menstruation of expression sixth embodiment of the invention with the 1E of sanitary towel.Menstruation with the 1E of sanitary towel is and the menstruation shown in Figure 9 roughly the same basic structure of the 1C of sanitary towel.In more detail, menstruation has flank section 21,21 and sheet 22,22 with the 1E of sanitary towel in left and right sides portion.
And, on the zone of being clamped, similarly form pressure contact portion 190 with the 1D of sanitary towel with menstruation shown in Figure 10 by two 22,22 edge part 22a and 22a.
At above-mentioned menstruation 1D of sanitary towel and 1E, be provided with the middle absorbent zone 11 that is surrounded by right side pressure contact portion 9a, left side pressure contact portion 9b, the place ahead pressure contact portion 9c and rear pressure contact portion 9d, it is the zone of liquid guide layer 5, as shown in Figure 5, to the distortion of user side convex, the Excretory organ of user is close in above-mentioned middle absorbent zone 11 easily.
The zone in more the place ahead of pressure contact portion 9c forwardly, the place ahead prolong pressure contact portion 9e and the place ahead prolongs pressure contact portion 9f along with forming near the 1c of front edge portion with being separated from each other.Therefore, prolonged zone that pressure contact portion 9e and the 1a of right side edge portion clamp and prolonged zone that pressure contact portion 9f and the 1b of left side edge portion clamp by the place ahead and prolong pressure contact portion 9e and the place ahead with the place ahead to prolong pressure contact portion 9f be crooked starting point, easily towards the direction distortion of user health by the place ahead.Therefore, menstruation with sanitary towel easily at ease between the hip thigh of user the place ahead part of portion.
Similarly, regional in the wings, prolonged zone that pressure contact portion 9g and the 1a of right side edge portion clamp and prolonged zone that pressure contact portion 9h and the 1b of left side edge portion clamp by the rear and also prolong pressure contact portion 9g and rear to prolong pressure contact portion 9h be crooked starting point, easily towards the direction distortion of user health with the rear by the rear.Therefore, menstruation is with sanitary towel's easy deformation, at ease on the health of user, with the buttocks servo-actuated of user.
In addition, because liquid guide layer 5 does not lean against on the pressure contact portion 190, therefore form the pressure contact portion 190 of identical compressive state easily.
In each embodiment shown in Fig. 1, Fig. 2, Fig. 7, Fig. 8 and Figure 10, by aforesaid liquid guide layer 5 is set, be not easy to take place middle absorbent zone 11 menses diffusion in addition, therefore, top flat with permeability for liquids forms whole its skin-side surface zone, even the sheet 22,22 or the flank section 21,21 of Fig. 9 or liquid impermeability shown in Figure 11 are not set, prevent the side leakage of menses easily yet.In addition, Fig. 1, Fig. 2, Fig. 7, Fig. 9, Figure 10 and each embodiment shown in Figure 11 even not only long but also wide buttocks protection part is not set especially, prevent easily that also menses from spilling to the buttocks direction on rear part shown in Figure 8.
And shown in Figure 12 A, Figure 12 B, the menstruation of embodiments of the present invention also can have leakproof wall 50, the 50A of longitudinal extension on the left and right sides of its skin-side surface with sanitary towel.
Leakproof wall 50,50A are by with two sheet 22 bendings, and side is clamped the elastomeric element 51 of longitudinal extension and formed within it.Figure 12 A, Figure 12 B are the profiles that menstruation is blocked on cross central line Ox-Ox with sanitary towel, and two above-mentioned 22 is further folded near the portion of edges at two ends longitudinally of menstruation with sanitary towel, and whole and top flat 6 is adhesively fixed.In addition, elastomeric element 51 is fixed on above-mentioned 22 to longitudinally extending state by the range of extension with regulation.
Utilize the contractility of elastomeric element 51, menstruation forms case of bending with sanitary towel, its result, and in the forward-and-rearward prescribed limit of cross central line Ox-Ox, sheet 22 erects, and forms above-mentioned leakproof wall 50,50A.
By this leakproof wall 50,50A are set, can further prevent the side leakage of liquid, in addition, as mentioned above because menstruation sanitary towel's bending, easy at ease between the hip thigh of user portion.
In addition, the sheet 22 that forms leakproof wall 50,50A both can merely be provided with shown in Figure 12 A, also can be involved in installation between downside absorber 3 and the egative film 2 with top flat 6 shown in Figure 12 B.
Below, with reference to Figure 13, describe with regard to the manufacture method of a routine menstruation with sanitary towel 1.
The non-woven fabrics such as hot-wind nonwoven cloth 101 that form liquid guide layer 5 usefulness are rolled into the mode of stock reel 100.Above-mentioned non-woven fabrics 101 is supplied with to heater block 103 by first driven roller 102.On this heater block 103, be provided with hot air apparatus 104, hot blast 105 is blown out to above-mentioned non-woven fabrics 101 by the hot-air mouth (not having diagram) from this hot air apparatus 104.
By blowing out of this hot blast 105, the volume of above-mentioned non-woven fabrics 101 recovers.Above-mentioned volume returns in 1.5～3 times the scope, and the density of this moment is at 0.005g/cm 3～0.02g/cm 3Scope.The ideal temperature of the hot blast 105 that blows out from above-mentioned hot air apparatus 104 is more than the softening temperature of the material that softening temperature is minimum the material that constitutes hot-wind nonwoven cloth, and, preferably be heated to the above temperature of softening temperature of the highest material of softening temperature.Concrete above-mentioned heating-up temperature is in 130 ℃～300 ℃ scope.
The non-woven fabrics 101 that has recovered thickness the early stage by second driven roller 106 or later stage or with pass through in supplied with to chiller 107.By the gas from the nozzle 107a of above-mentioned chiller 107 ejection, above-mentioned non-woven fabrics 101 is by cool quickly.And above-mentioned chiller 107 tow sides of non-woven fabrics 101 relatively is provided with a pair of.
Because to after being heated the above-mentioned non-woven fabrics 101 that has recovered volume and cooling off, the fiber that forms above-mentioned non-woven fabrics 101 is immobilized at short notice, therefore, above-mentioned non-woven fabrics 101 can keep the state after volume recovers immediately.Even since after transmission, apply under the tensile situation to above-mentioned non-woven fabrics 101 immediately, the volume of above-mentioned non-woven fabrics 101 can not damage yet, and can recover volume rapidly when tension force is disengaged.
Particularly, above-mentioned non-woven fabrics 101 is under the situation by the fibroplastic hot-wind nonwoven cloth of thermoplasticity, and by cooling, the temperature that constitutes the material of non-woven fabrics reaches below the softening temperature.Therefore, even be applied in mentioned strain, can prevent that also non-woven fabrics 101 from stretching, volume reduces.
Under the situation of transporter shown in Figure 13, preferably the rotary speed with second driven roller 106 of the back segment that is arranged on heater block 103 is identical or faster to be arranged on the rotary speed of first driven roller 102 of leading portion of heater block 103.If heat-treat by heater block 103, the length to direction of transfer when non-woven fabrics 101 volumes increase is shunk.Therefore, if make the rotary speed of second driven roller 106 of the back segment of heater block 103 be higher than the rotary speed of first driven roller 102 of the leading portion of heater block 103, recover volume even above-mentioned non-woven fabrics 101 temporarily is heated parts 103, be subjected to being reduced easily to direction of transfer stretching, extension, volume once more from the tension force of second driven roller 106.Rotary speed by making above-mentioned second driven roller 106 is identical or slower than first driven roller 102 with first driven roller 102, can not apply tension force to direction of transfer for above-mentioned non-woven fabrics 101, can keep fluffy state.
In addition, if above-mentioned chiller 107 is set at the leading portion of second driven roller 106, then more effectively above-mentioned non-woven fabrics 101 is remained on volume and return to form.
The non-woven fabrics 101 that has recovered volume by three plies for example shown in Figure 3 after, between cutting roller 108,109, supply with, be cut into the shape of regulation, form liquid guide layer 5.This liquid guide layer 5 attracted to conveyer, is sent to cylinder 113,114.
The non-woven fabrics such as hot-wind nonwoven cloth 111 that form top flat 6 usefulness are rolled into the mode of stock reel 110.Above-mentioned non-woven fabrics 111 is by behind the cylinder 112, above-mentioned non-woven fabrics 111 and aforesaid liquid guide layer 5 by cylinder 113,114 clamp, overlapped, formed between the roller 115,116 to the liquid infiltration hole and supplied with.
In the aforesaid liquid permeability hole forms roller, be provided with a plurality of heated screws with the surface of the cylinder 115 of non-woven fabrics 111 opposite sides that form top flat 6, the opposing party, with the surface of the cylinder 116 of liquid guide layer 5 opposite sides are tabular surfaces.
After superimposed non-woven fabrics 111 and liquid guide layer 5 were formed to the liquid infiltration hole and supply with between the roller 115,116, the above-mentioned screw of heating was thrust above-mentioned non-woven fabrics 111, and 5 form a plurality of liquid infiltration hole 15 from non-woven fabrics 111 to liquid guide layer.Because above-mentioned non-woven fabrics 111 and liquid guide layer 5 contain the thermoplasticity fiber, therefore, by thrusting heated screw, above-mentioned thermoplasticity fiber is bonded, and on the part of aforesaid liquid permeability hole 15, non-woven fabrics 111 and liquid guide layer 5 are by bonding mutually.Therefore, need not smear bonding agent, but can before forming roller 115,116 between by the liquid infiltration hole above-mentioned non-woven fabrics 111 and liquid guide layer 5, smear bonding agent yet at the interface of above-mentioned non-woven fabrics 111 and liquid guide layer 5 at the interface of above-mentioned non-woven fabrics 111 and liquid guide layer 5.
On the surface of pulp layer pressure roller 120, the paper pulp that forms upper strata absorber 4 and lower floor's absorber 3 by lamination, be held in the regulation shape.The paper pulp layered product of supplying with from this pulp layer pressure roller 120 121 be set at the thin paper 125 extracted out from stock reel 123 above, and be sandwiched in above-mentioned thin paper 125 and the thin paper 124 extracted out from stock reel 122 between.
On the paper pulp layered product of being clamped by above-mentioned thin paper 124,125 121, the heat molten type bonding agent is smeared into waveform patterns or spiral pattern by nozzle 126.This heat molten type bonding agent is applied on the outside of the thin paper 125 that covers the paper pulp that constitutes upper strata absorber 4.
Above-mentioned paper pulp layered product 121 and non-woven fabrics 111 and liquid guide layer 5 superimposed supplies between cylinder 127,128, by above-mentioned heat molten type bonding agent, the thin paper 125 that covers aforesaid liquid guide layer 5 and paper pulp layered product 121 surfaces is by bonding.
And, supplied with to knurling rolls 129,130 by the layered product that the paper pulp layered product 121 that is encased by above-mentioned non-woven fabrics 111, liquid guide layer 5 and thin paper 124,125 constitutes, form pressure contact portion 9 shown in Figure 1.
Pressure contact portion 9 contacts for planar cylinder 129 with the surface in the outside of the thin paper 124 that covers paper pulp layered product 121, outside at non-woven fabrics 111, contact and form with the warm-up mill 130 of the protuberance with embossing, paper pulp layered product 121 and non-woven fabrics 111 are pressurizeed partly and are heated.And in the outside of thin paper 124, the heat molten type bonding agent is smeared by nozzle 131.
The thin film 133 that forms the non-poisture-penetrability of egative film 2 is pulled out from stock reel 132.Above-mentioned thin film 133 and above-mentioned layered product are formed the layered product of overlapping thin film 133 by pressurization, bonding between cylinder 134,135.
And above-mentioned layered product is supplied with between cutting roller 136 and 137, is determined the menstruation sanitary towel 1 of shape shown in Figure 1.
Figure 14 to Figure 16 is other examples of above-mentioned heater block 103.In Figure 14, non-woven fabrics 101 is supplied with in heater 140.Hot blast 141 blows out in above-mentioned heater 140, all becomes heated condition in the above-mentioned heater 140.Therefore, in above-mentioned heater 140, the inside and outside two sides of above-mentioned non-woven fabrics 101 is heated, and can more effectively recover the volume of above-mentioned non-woven fabrics 101.
Heater 103 among Figure 15 is made of warm-up mill 142 and 143.Above-mentioned non-woven fabrics 101 is twisted in heating on above-mentioned warm-up mill 142 and 143.
Above-mentioned warm-up mill 142 and 143 is separated from each other and surface smoothing.Above-mentioned non-woven fabrics 101 is not pressurized between two warm-up mills 142 and 143, is twisted on each warm-up mill 142 and 143 to transmit.At this moment, because the one side of above-mentioned non-woven fabrics 101 contacts with the surface of above-mentioned warm-up mill 142 and is heated, the another side of above-mentioned non-woven fabrics 101 contacts with the surface of above-mentioned warm-up mill 143 and is heated, and therefore, above-mentioned non-woven fabrics 101 is heated from tow sides by above-mentioned two warm-up mills 142,143.
Among Figure 16, rotation roller 145 is set between first driven roller 102 and second driven roller 106.Separate the distance of regulation with the peripheral surface of this rotation roller 145, be provided with hot air apparatus 146, this hot air apparatus 146 is to have the peripheral surface bending of the face of hot air blow port along above-mentioned rotation roller 145.Between above-mentioned hot air apparatus 146 and rotation roller 145, leave the interval of regulation, when above-mentioned non-woven fabrics 101 passes through rotation roller 145, do not contact with above-mentioned hot air apparatus 146.
When above-mentioned non-woven fabrics 101 passed through on the rotation roller 145, hot blast 147 blew out facing to above-mentioned non-woven fabrics 101 from the hot air blow port (not having diagram) that is arranged on hot air apparatus 146, and the volume of above-mentioned non-woven fabrics 101 is resumed.Above-mentioned rotation roller 145 is heated itself, can heat the tow sides of above-mentioned non-woven fabrics 101, can recover volume effectively, and is very desirable.
In addition, the rotary speed of above-mentioned first driven roller 102 and second driven roller 106 relation or about the explanation of chiller 107 with illustrated in fig. 13 identical, therefore, in this omission.
In addition, above-mentioned heater block 103 and chiller 107 also can be arranged on the transfer path of the above-mentioned non-woven fabrics 111 that forms top flat 6, recover the volume of above-mentioned non-woven fabrics 111 with above-mentioned non-woven fabrics 101.
In addition, after above-mentioned non-woven fabrics 111 and liquid guide layer 5 were superimposed, this non-woven fabrics 111 and liquid guide layer 5 also can be heated together, be cooled off.
Embodiment
(embodiment A)
Below, performance and the comparative example of the embodiment of absorbent commodity of the present invention compared explanation.Among the following embodiment and comparative example, Fig. 1 is studied with sanitary towel to the menstruation of structure shown in Figure 4.
(size)
Length on the longitudinal centre line of sanitary towel is 210mm, and the width on the cross central line is 80mm, and the length L 2 on the longitudinal centre line in middle absorbent zone is 94mm, and the width W 2 on the cross central line is 29mm.
(condition of pressure contact portion)
Wide Wa=3mm, width dimensions δ=0.7mm, the spacing P=2.7mm of the 9D of fusion portion.This pressure contact portion forms by 120 ℃ of temperature, the pressure 1.76kPa of knurling rolls.
(1) embodiment
Top flat 6 is the outer integumentary pattern composite synthetic fibres of core, and core is the dimethyl ester (PET) that contains 1.0 quality % titanium oxides, and crust is polyethylene (PE), is 2.2dtex by fibrousness, and fiber length is that 44mm forms hot-wind nonwoven cloth.In the above-mentioned synthetic fibers, 80 quality % smear hydrophilic interfacial agent, and 20 quality % smear the interfacial agent of water proofing property.Density is 0.083g/cm 3, weight per unit area is 25g/m 2
Aforesaid liquid guide layer 5 use core as polypropylene (PP), crust as the outer integumentary pattern composite synthetic fibre of the core of the eccentric type of polyethylene (PE), utilize fibrousness to be 4.4dtex, fiber is long to be the hot-wind nonwoven cloth of 50mm.Density is 0.042g/cm 3, weight per unit area is 20g/m 2Folding this non-woven fabrics becomes three layers.
With top flat 6 and liquid guide layer 5 usefulness screw temperature is that 110 ℃, hole temperature are that 120 ℃ mould is clamped, and forms the liquid infiltration hole of opening diameter 1mm, spacing Hy=3.75mm, Hx=2.0mm.
Upper strata absorber 4 is layered products of chemical pulp, and the applying unit area weight is 230g/m 2, lengthwise is 120mm, laterally Breadth Maximum is the material of 55mm.Lower floor's absorber 3 is that mixed chemical paper pulp weight per unit area is 160g/m 2With high absorption polymer 8g/m 2, using lengthwise is the material of 75mm as 180mm, horizontal Breadth Maximum.Under upper strata absorber 4 and the lower floor's absorber 3 eclipsed states, be 15g/m with weight per unit area respectively 2Thin paper cover the surface of upper strata absorber 4 and the following back of lower floor's absorber 3 is used as absorbed layer.
Egative film 2 as liquid impermeability and breathability uses polyethylene (PE) thin film that is formed with trickle passage.
On the interface of liquid guide layer 5 and upper strata absorber 4, smear 3g/m with the helical form of wide 18mm 2The hot-melting type bonding agent.
(2) comparative example 1
With the foregoing description is identical structure, just studies liquid guide layer 5 and uses width to be the 120mm material as 55mm, length, and liquid guide layer 5 is sandwiched in the comparative example 1 on the pressure contact portion 9.
(3) comparative example 2
Comparative example 2 to the liquid guide layer 5 that do not have the foregoing description studies.Top flat 6 is the hot-wind nonwoven cloths that do not contain the water proofing property fiber, uses the weight per unit area identical with embodiment, the material of equal densities.The identical liquid infiltration hole of offering on top flat 6 only with embodiment.
(4) mensuration of liquid diffusion property
As artificial menses, in 4.0 liters ion exchange water, add glycerol 300g, acid methyl cellulose sodium 30g, sodium chloride 40g, painted with red food coloring.
At embodiment and comparative example propylene substrate (deadweight 115g) is set all, this propylene substrate has longitudinal opening and is of a size of 40mm, and transverse opening is of a size of the slotted hole of 10mm, supplies with above-mentioned artificial menses from above-mentioned slotted hole to the core in middle absorbent zone.Injection rate is 95ml/min, supplies with for the first time and supplies with 4ml for the second time after 3ml, liquid disappear from the surface, and liquid is supplied with 3ml for the third time after disappearing from the surface.
Then, the liquid on the mensuration top flat is to horizontal diffusion size.
(5) (measurement result)
Be of a size of 21mm among the embodiment, be of a size of 29mm in the comparative example 1, be of a size of 34mm in the comparative example 2.
(Embodiment B)
Below utilize embodiment and comparative example to compare, the performance that just is used for the aforesaid liquid guide layer of absorbent commodity describes.
In following embodiment 1-6 and comparative example 1-4, following hot-wind nonwoven cloth is studied as liquid guide layer.
(1) embodiment 1
The formation core is that polypropylene (PP), crust are the outer integumentary pattern composite synthetic fibre of core of the eccentric type of polyethylene (PE), uses fibrousness to be 4.4dtex, and fiber is long to be that 50mm, formation weight per unit area are 20g/m 2Hot-wind nonwoven cloth.This non-woven fabrics is recovered volumes with 135 ℃ of heat treatments that carried out a minute in baking oven, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(2) embodiment 2
Hot-wind nonwoven cloth that will be identical with embodiment 1 with 145 ℃ of heat treatments that carry out a minute, then, is that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature in baking oven.
(3) embodiment 3
Hot-wind nonwoven cloth that will be identical with embodiment 1 carries out one minute heat treatment with 160 ℃ hot blast in baking oven, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(4) embodiment 4
The formation core is that dimethyl ester (PET), this dimethyl ester contain the titanium oxide that quality of fiber is 1.1 quality %, crust is the outer integumentary pattern composite synthetic fibre of core of the eccentric type of polyethylene (PE), use fibrousness to be 2.2dtex, fiber is long to be that 44mm, formation weight per unit area are 25g/m 2Hot-wind nonwoven cloth.With this non-woven fabrics in baking oven with 135 ℃ of heat treatments that carry out a minute, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(5) embodiment 5
Hot-wind nonwoven cloth that will be identical with embodiment 4 carries out one minute heat treatment with 145 ℃ hot blast in baking oven, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(6) embodiment 6
Hot-wind nonwoven cloth that will be identical with embodiment 4 carries out one minute heat treatment with 160 ℃ hot blast in baking oven, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(7) comparative example 1
The hot-wind nonwoven cloth identical with embodiment 1 do not heat-treated, intactly used.
(8) comparative example 2
Hot-wind nonwoven cloth that will be identical with embodiment 1 carries out one minute heat treatment with 115 ℃ hot blast in baking oven, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(9) comparative example 3
The hot-wind nonwoven cloth identical with embodiment 4 do not heat-treated, intactly used.
(10) comparative example 4
Hot-wind nonwoven cloth that will be identical with embodiment 4 carries out one minute heat treatment with 115 ℃ hot blast in baking oven, then, be that 20 ℃, relative humidity are to place 30 minutes under 60% the environment in room temperature.
(11) thickness measurement of the hot-wind nonwoven cloth of the foregoing description and comparative example
The hot-wind nonwoven cloth of the foregoing description and comparative example is cut into the size of 100 * 100mm as sample.Is between the propylene substrate of 70g with above-mentioned specimen holder two each 100 * 200mm, quality.
Each sample is clipped under the state on the propylene substrate, utilizes the smart device of Daiei science to make the thickness gauge of being produced (UF-60A type) and measure.This is as " thickness during drying (dry) ".In addition, thickness is that the terminal with thickness gauge is placed on the mensuration of propylene substrate after last one minute, below identical.
Then, each sample is soaked in fully instantaneous the picking up in back in the artificial menses described in the embodiment A.Then each sample is clipped on the above-mentioned propylene substrate, utilizes above-mentioned thickness gauge that sample thickness is measured.This is as when moistening (wet) " thickness ".
Then, each sample is soaked in the artificial menses instantaneous the picking up in back fully, is clipped under the state on the above-mentioned propylene substrate, on the terminal of thickness gauge, place the counterweight of 930g, to the propylene substrate 980Pa (10g/cm that exerts pressure 2).The terminal of thickness gauge is placed on the propylene substrate after last one minute, the thickness of working sample.This is as " moisture state down and the thickness during pressurization ".
Then counterweight is taken down and restored each sample thickness, similarly measure thickness after one minute.This is as " recovery thickness ".
Table 1 expression be sample drying the time thickness, the thickness when moistening, the moisture state thickness during pressurization and restore thickness down.
Table 1
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4
Dry thickness ??2.46 ??2.88 ??2.78 ??2.21 ??2.28 ??2.2 ??0.8 ??2.33 ??0.62 ??1.81
Wet thickness ??2.31 ??2.56 ??2.66 ??2.24 ??2.2 ??2.18 ??0.7 ??2.07 ??0.56 ??1.72
The Wet thickness that pressurizes ??0.54 ??0.64 ??0.84 ??0.87 ??0.83 ??0.9 ??0.2 ??0.4 ??0.15 ??0.57
Restore thickness ??1.17 ??1.43 ??1.61 ??1.62 ??1.56 ??1.58 ??0.37 ??0.88 ??0.32 ??1.27
Unit is mm
Table 2 expression be drying the time density, the density when moistening, the moisture state density during pressurization and restore density down.These are to calculate from the weight per unit area of the hot-wind nonwoven cloth of the thickness shown in the table 1 and each sample.
Table 2
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4
Dry density 0.0081 ??0.0069 ??0.0072 ??0.0113 ??0.011 ??0.0114 ??0.025 ??0.0086 ??0.0403 ??0.0138
Wet density 0.0087 ??0.0078 ??0.0075 ??0.0112 ??0.0114 ??0.0115 ??0.0286 ??0.0097 ??0.0446 ??0.0145
Wet adds percent consolidation 0.037 ??0.0313 ??0.0238 ??0.0287 ??0.0301 ??0.0278 ??0.1 ??0.05 ??0.1667 ??0.0439
Restore density 0.0171 ??0.014 ??0.0124 ??0.0154 ??0.016 ??0.0158 ??0.0541 ??0.0227 ??0.781 ??0.0197
Unit is g/cm 3
(12) liquid diffusion test
Determine the sheet of three 100 * 100mm sizes from each hot-wind nonwoven cloth of the foregoing description 1 to 6 and comparative example 1 to 4, it is overlapping as the liquid guide layer of measuring usefulness.
As the top flat of measuring usefulness, utilize core to contain the titanium oxide that quality of fiber is 1.1 quality % for dimethyl ester (PET), this dimethyl ester, crust is the outer integumentary pattern composite synthetic fibre of core of the eccentric type of polyethylene (PE), fibrousness is 2.2dtex, and fiber is long to be that 44mm, applying unit area weight are 25g/m 2Hot-wind nonwoven cloth.From above-mentioned non-woven fabrics, top flat determined width 100mm, length 200mm.
As the liquid guide layer of measuring usefulness, the upper strata absorber of overlapping lengthwise 120mm, horizontal wide 55mm on lower floor's absorber of lengthwise 180mm, horizontal wide 75mm, at this, the upper strata absorber is that chemical pulp is laminated into weight per unit area is 230g/m 2, lower floor's absorber is that (weight per unit area is 160g/m to mixed chemical paper pulp 2) and superabsorbent polymer (8g/m 2).The two sides of absorbed layer is by 15g/m 2Thin paper cover.
At width is that 100mm, length are overlapping above-mentioned absorbed layer, aforesaid liquid guide layer, above-mentioned top flat on the overlapping propylene substrate on the propylene substrate of 200mm.Place other propylene substrate (quality is that 115g, width are that 100mm, length are 200mm) on above-mentioned top flat, it is that 40mm, width are the slotted hole of 10mm that this propylene substrate has length at central part, and above-mentioned slotted hole is set in the central authorities that are positioned at sample.
Supply with above-mentioned artificial menses from above-mentioned slotted hole.Injection rate is 95ml/min, and supply with 3ml the first time, liquid disappeared back 30 seconds from sample surfaces, supplies with 4ml for the second time with same injection rate, and liquid disappeared from the surface back 30 seconds, supplied with 3ml for the third time with same injection rate.
After injecting for the third time, after affirmation liquid disappeared back one minute from sample surfaces, take away propylene substrate, measure vertical, the horizontal maximum diffusion size of liquid on top flat with slotted hole.
Measurement result as shown in Figure 3.
Table 3
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4
Penetration period for the first time ??4.95 ??4.68 ??4.19 ??5.06 ??4.96 ??5.08 ??6.82 ??5.15 ??9.35 ??5.41
Penetration period for the second time ??7.32 ??6.44 ??6.47 ??8.18 ??6.83 ??7.27 ??13.01 ??7.95 ??22.7 ??9.53
Penetration period for the third time ??7.71 ??7.07 ??6.96 ??8.41 ??8.24 ??8.17 ??16.54 ??9.91 ??30.15 ??11.78
The diffusion breadth horizontal stroke is wide ??64 ??62 ??61 ??63 ??60 ??62 ??69 ??69 ??62 ??67
The diffusion breadth lengthwise ??36 ??35 ??35 ??34 ??33 ??32 ??42 ??40 ??28 ??37
Wetting-out rate is estimated ??○ ??○ ??○ ??○ ??○ ??○ ??× ??○ ??× ??○
The evaluation of the diffusion width of cloth ??○ ??○ ??○ ??○ ??○ ??○ ??× ??× ??○ ??△
Penetration period unit is second, and the unit of diffusion breadth is mm
As shown in table 1, the thickness the when non-woven fabrics of embodiment 1 to 6 pressurizes under moisture state more than or equal to 0.5mm smaller or equal to 1mm, restore thickness more than or equal to 1mm smaller or equal to 2mm.Therefore, the thickness the when moisture state of the liquid guide layer that obtains pressurizes down is 1.5～3mm, and recovery thickness is 3～6mm.In addition, the density the during non-woven fabrics of embodiment dry is 0.005～0.02g/cm 3, moistening and density when pressurization is 0.005g/cm 3～0.04g/cm 3
About embodiments of the invention, illustrate and illustrate, still, above-mentioned and other various changes, omit, append and can not exceed aim of the present invention and scope ground and constitute, certainly can understand as the colleague dealer.Therefore, can not be interpreted as that the present invention just is limited to certain embodiments described herein, comprise in the adnexa in the scope of the equalization of the feature of claim that comprising can be by the various possible embodiment of specializing.
As mentioned above, the present invention can be absorbed in the liquid that applies repeatedly in the scope of absorbent commodity middle absorbent zone limitation rapidly, can prevent the diffusion of liquid on top flat.This absorbent commodity can also prevent side leakage effectively.Especially,, therefore can cosily use because the Excretory organ of user can positively be close in the middle absorbent zone of this absorbent commodity, and, can be at middle absorbent regional centralized, absorption liquid.

Claims (9)

1. absorbent commodity comprises: the top flat (6) and the absorbed layer of egative film (2), permeability for liquids, and this absorbed layer possess hydrophilic property material is set between the top flat (6) of egative film (2) and permeability for liquids, it is characterized in that,
From the centrage (Oy-Oy) of the longitudinal extension of absorbent commodity on the position of leaving left and right sides predetermined distance, absorbed layer vertically is being formed extended at both sides continuously with the pressure contact portion that above-mentioned top flat (6) was compressed, became concavity, regulation middle absorbent zone between above-mentioned pressure contact portion, in the auxiliary absorption region of regulation, the above-mentioned pressure contact portion outside
In above-mentioned middle absorbent zone, liquid guide layer (5) quilt and above-mentioned pressure contact portion are not arranged between above-mentioned absorbed layer and the above-mentioned top flat (6) overlappingly, this liquid guide layer is made of the fiber that leaves ground, space joint in inside, and it is lower than above-mentioned absorbed layer density, therefore, in above-mentioned auxiliary absorption region, above-mentioned absorbed layer is covered by above-mentioned top flat (6).
2. absorbent commodity as claimed in claim 1, it is characterized in that above-mentioned pressure contact portion further extends, mutually continuously, the scope of surrounding regulation is as above-mentioned middle section, aforesaid liquid guide layer (5) has than the little area in above-mentioned middle absorbent zone, and is not overlapping with above-mentioned pressure contact portion.
3. absorbent commodity as claimed in claim 1, it is characterized in that, above-mentioned absorbed layer is by lower floor's absorber (3) and superimposed upper strata absorber (4) formation on above-mentioned lower floor absorber (3), the area of upper strata absorber (4) is less than lower floor's absorber (3), and area greater than above-mentioned middle absorbent zone, at above-mentioned pressure contact portion, above-mentioned lower floor absorber (3) and above-mentioned upper strata absorber (4) are compressed, form concavity with above-mentioned top flat (6)
Above-mentioned auxiliary absorption region has the heavy section (12a) adjacent with above-mentioned pressure contact portion, at this, (4) all exist on above-mentioned lower floor absorber (3) and the above-mentioned upper strata absorber, in addition, in the outside of above-mentioned heavy section (12a), has thinner wall section (12b), at this, above-mentioned lower floor absorber (3) exists, and above-mentioned upper strata absorber (4) does not exist.
4. absorbent commodity as claimed in claim 1 is characterized in that, in above-mentioned middle absorbent zone, is formed with a plurality of liquid and sees through hole (15), and this liquid connects above-mentioned top flat (6) through the hole and extends to above-mentioned liquid guide layer (5).
5. absorbent commodity as claimed in claim 4 is characterized in that, sees through hole (15) on every side at aforesaid liquid, and the chemical fibre that forms above-mentioned top flat (6) and the chemical fibre that forms aforesaid liquid guide layer (5) are by heat bonding.
6. absorbent commodity as claimed in claim 1 is characterized in that, the fibre density when aforesaid liquid guide layer (5) is dry is more than or equal to 0.005g/cm 3, smaller or equal to 0.02g/cm 3
7. absorbent commodity as claimed in claim 6 is characterized in that, aforesaid liquid guide layer (5) under moisture state, apply 980Pa (10g/cm 2) pressure the time fibre density at 0.005g/cm 3～0.04g/cm 3Scope in.
8. absorbent commodity as claimed in claim 6 is characterized in that, aforesaid liquid guide layer (5) is hot-wind nonwoven cloth or the air-laid nonwoven fabrics that is made of chemical fibre.
9. absorbent commodity as claimed in claim 8 is characterized in that, above-mentioned non-woven fabrics is folded into many and forms aforesaid liquid guide layer (5) overlappingly.
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TW200401628A (en) 2004-02-01
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