CN103876897B - The method of pant-type absorbent article and manufacture pant-type absorbent article - Google Patents
The method of pant-type absorbent article and manufacture pant-type absorbent article Download PDFInfo
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- CN103876897B CN103876897B CN201410064403.2A CN201410064403A CN103876897B CN 103876897 B CN103876897 B CN 103876897B CN 201410064403 A CN201410064403 A CN 201410064403A CN 103876897 B CN103876897 B CN 103876897B
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Classifications
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- 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
- A61F13/49—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 specially adapted to be worn around the waist, e.g. diapers, nappies
- A61F13/496—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 specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
- A61F13/4963—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 specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs characterized by the seam
-
- 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
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15739—Sealing, e.g. involving cutting
-
- 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
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15756—Applying tabs, strips, tapes, loops; Knotting the ends of pads
-
- 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
- A61F13/49—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 specially adapted to be worn around the waist, e.g. diapers, nappies
- A61F13/496—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 specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Epidemiology (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)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
A kind of pant-type absorbent article, the core comprising basal body structure and be combined as a whole with basal body structure, crotch's sheet that described basal body structure comprises the anter with front edge and the first and second lateral edges, the rear panel with back edge and the first and second lateral edges and is arranged between anter and rear panel, at least one in anter and rear panel comprises elastomeric nonwoven thing/film laminate, and the first and second lateral edges of anter are engaged to corresponding first and second lateral edges of rear panel by side face seam.Each side face seam is formed on weldable Connection Element at least in part, Connection Element comprises the Part I on the lateral edges that is fixed on anter and is fixed on the Part II in the respective side edges in rear panel, and described first and second parts of described Connection Element engage to form described side face seam by thermal welding.The invention still further relates to a kind of method for the manufacture of pant-type absorbent article.
Description
The divisional application that the application's to be the applying date be December in 2006 22 days, application number are 200680056751.9, denomination of invention is the application for a patent for invention of " pant-type absorbent article and manufacture the method for pant-type absorbent article ".
Technical field
The present invention relates to a kind of pant-type absorbent article, it core components comprising basal body structure and be combined as a whole with basal body structure, crotch's sheet that described basal body structure comprises the anter with front edge and the first and second lateral edges, the rear panel with back edge and the first and second lateral edges and is arranged between anter and rear panel, the first and second lateral edges of anter are engaged to corresponding first and second lateral edges of rear panel by side seam.
Background technology
The absorbent core components that pant-type absorbent article generally includes pants type basal body structure and is combined as a whole with matrix.Main purpose during design pants type article makes them as far as possible close to the pattern of common underwear.Therefore, absorbing articles (such as pants type diaper, sweat pants and mistake flap trousers) is designed to comfortable adaptive with wearer snugly.Also require such article on the buttocks of wearer, can be pulled to make wearer or care-giver to be easy to take off dirty absorbing articles up and down in the mode of a pair underwear and change a new clean absorbing articles.For those reasons, article matrix is usually by least around waist be that the stretchable material of elasticity is made in the region that will be applied in wearer's buttocks.
Usually, the matrix of pant-type absorbent article is made up of multilamellar inelastic thermoplastic non-woven material always, and described material has layout flexible member between layers, and such as fine rule or band have elasticity to make the selected part of matrix.In these article, the fiber of nonwoven woven pieces or joint portion keep not damaged and can be used to form firmly still openable welded seam and seam between matrix each several part in the manufacture process of basal body structure.But, in order to meet the requirement of more underwear shape pants type article, realizing traditional elasticization by flexible member and being replaced by elastomeric nonwoven thing/film laminate.
An example of the elastic laminate for pant-type absorbent article is disclosed in WO03/047488.Lamination is made up of the elastic film be applied between two nonwoven layers.In the manufacture process of elastic laminate, nonwoven layers has been combined on thin film, after this lamination experience activation processing, activates to relate to impel the lamination increment of the joint portion in nonwoven woven pieces and fibrous fracture to stretch.Thus, the elasticity activating lamination is very identical with the elasticity of elastic film.The problem of the non-woven fleece/film laminate of this activation is that the welding seam formed on the material weakened mechanically has poor tensile strength.This means to also exist pants type article be through wearer with it time or when it is put on seam by premature failure.
Other example of the elastic laminate for forming pants type article is disclosed in WO2005/122984 and WO2005/122985.Disclosed in material in these applications and WO03/041988, the part that is different from of material is that the joint portion of at least one nonwoven layers in elastic laminate and fiber do not rupture completely.On the contrary, described layer keeps certain residual strength.PCT application WO2005/122984 and WO2005/122985 describe its Elastic with pliability and the combined lamination of anti-piercing through property of lamination.But welding side seams pants type article comprising this lamination still shows lower tensile strength compared with the welding seam of the traditional pants type article be made up of the nonwoven layers obtaining elastification by elastic threads or band.
Pant-type absorbent article is formed to have in the side of basal body structure seam or junction surface usually to make the front portion of article be connected with rear portion and to form the pants type article with waist opening and leg opening.Usually, collateral joints is arranged such that they are in the buttocks of user in the use procedure absorbing pants type article, but it is also known that collateral joints is arranged to closer to article anterior.
Side face seam is preferably made so that they provide enough integrity to matrix when it is worn and when putting on.This means side face seam should bear when pants type article are essentially pulled up on wearer's buttocks produce tensile stress and because of the motion of wearer in article use procedure side face seam place produce any stress.But, verifiedly very advantageously use trailing flank seam to split to controllably at article, make it possible to be easy to take off soiled item with it from user, and will it not fall along leg.Openable side face seam is the easiest to be formed by fusion techniques (such as ultrasonic fusing or thermal welding) by the thermoplastic element on matrix material.Problem for the formation of the elastic laminate material of elastic matrix structure is that they have poor weldable usually, thus causes side face seam to weaken, and it can lose efficacy when dressing articles or when article are put on.
Thus, the object of this invention is to provide a kind of elasticity pant-type absorbent article, the power produced when it comprises elastic laminate material and shows enough intensity to bear and to wear and put on article.
Another object of the present invention is to provide a kind of elasticity pant-type absorbent article, and it comprises elastic laminate material and has openable side face seam.
Another object of the present invention is to provide a kind of simple and efficient way for the manufacture of elasticity pant-type absorbent article, and described pant-type absorbent article has side face seam, the power produced when this side face seam shows sufficient intensity to bear and to wear and put on article.
Summary of the invention
According to the present invention, a kind of pant-type absorbent article is provided, the core comprising basal body structure and be combined as a whole with basal body structure, described basal body structure comprises the anter with front edge and the first and second lateral edges, there is the rear panel of back edge and the first and second lateral edges, and the crotch's sheet be arranged between anter and rear panel, at least one in described anter and rear panel comprises elastomeric nonwoven thing/film laminate, first and second lateral edges of anter are engaged to corresponding first and second lateral edges of rear panel by side face seam, wherein, each described side face seam is formed on weldable Connection Element, Connection Element comprises the Part I on the lateral edges that is fixed on anter and is fixed on the Part II in the respective side edges in rear panel, described first and second parts of described Connection Element engage to form described side face seam by thermal welding.
Firmly shear combination to be formed between the anter and rear panel of Connection Element and basal body structure, Connection Element is permanently affixed in anter and rear panel.By being permanently fixed material outside the joint that is connected firmly that means between material by before rupturing under tensile stress at joint or the degree that ruptures occurs simultaneously.
Connection Element is fixed in anter and rear panel by binding agent.Suitable binding agent is thermoplastic hot melt adhesive or the especially preferred latex with hotmelt.Binding agent can coating to be applied by any suitable method (such as by injection, nozzle coating, printing etc.) with certain graphics mode (such as dot pattern or line graph) as a whole.But, other fixing means (such as heat or ultrasonic fusing) can be adopted.
Combination between each in Connection Element and anter and rear panel is formed in the overlapping region of Connection Element and base sheet.Like this, Connection Element connects the effect of anter and rear panel by playing, particular by occupying suitable large area (200mm
2-60000mm
2magnitude) joint portion be connected on the usually relatively weak elastic laminate material of these sheets, shear stress is only born in described joint portion, does not bear the peeling force produced in side face seam place in the conventional use procedure of article.Thus, Connection Element as base sheet material at the reinforcement at absorbing articles lateral edges place and be provided for the weldable material forming firm, preferred openable welding side face seam.
Collateral joints preferably openable collateral joints, mean that they are enough firm in bear at the dress of pant-type absorbent article and the stress put in process, but they can be stripped by controlled manner or tear when taking off article after use.Preferably, collateral joints can be opened in welding side face seam place.But, it will also be appreciated that formation can be opened and selectively again closed junction surface between Connection Element and anter.
Connection Element is thermal welding parts.Therefore, Connection Element can obtain welding by any method, comprises the heating of material and softening or fusing, and the combination such as realized by heating tool, mechanical compress heat-dissipating combine (pressure combinations) or ultrasound wave combination.In order to can thermal welding, Connection Element should comprise the thermoplastic of sufficient amount.Example for the suitable thermoplastic polymer of Connection Element is the mixture of polyethylene, polyester, polypropylene and other polyolefin homopolymer and copolymer and thermoplastic polymer.Connection Element can comprise thermoplastic film or thermoplastic nonwoven web or two-layer or plural layers or non-woven fleece lamination.Especially suitable nonwoven web is that those comprise the nonwoven web of the thermoplastic fibre of polypropylene and polyethylene fibre mixture.Weldable nonwoven web and thin film have high-load thermoplastic and comprise at least 50% thermoplastic, preferably include the thermoplastic of at least 80%.
According to the preferred embodiment of the present invention, Connection Element comprises two rectangle material fragments, and they engage along common edge when the relation faced by being arranged to be in directly.In this embodiment, Connection Element is rectangle material fragment, and have the fused joints striding across material segments and extend, this fused joints is preferably parallel to the lateral edges of anter on basal body structure and rear panel and forms collateral joints on pant-type absorbent article.
Rectangle Connection Element can have the width of the 20-200mm perpendicular to side face seam.The width of Connection Element determines the lap between the material in Connection Element and anter and rear panel.For undersized article, such as, for the diaper of raw baby morning, the lap with 10mm is enough to be provided for the region of reliable connection.But, for heavy incontinence adult needed for large scale article, need there is the lap reaching 100mm.
Connection Element has and is parallel to side face seam and the length consistent with at least 25% of the length of side face seam.Thus, Connection Element can be arranged to the part only providing side face seam between the waist opening and leg opening of article.Usually, Connection Element can only be arranged along those parts (such as the elastic laminate of a part for the basal body structure of pants type article) that the respective side edges of anter and rear panel is made up of the material with poor weldability.If pant-type absorbent article has elastic waist plate, then waist panel can comprise weldable material layer, such as nonelastic nonwoven.But in order to play the manufacture advantage that manufacture Connection Element and welding seam separately produce completely, Connection Element is preferably arranged to the total length that they provide side face seam.Like this, welding step can be completed independently with the main course of processing of the high speed of pants type article, and prefabricated Connection Element can be introduced into trousers manufacture process at a high speed, and the welding step of relative low speeds need not be considered.
The elastic waist plate at least one being arranged in anter and rear panel can be had according to pant-type absorbent article of the present invention.Elastic waist plate extend continuously between collateral joints always and can Perfect Ring around the waist opening of absorbing articles.
Absorbent cores is combined in separately parts on basal body structure or the part as core components or " core bag ", the absorbent cores that described core handbag is drawn together top layer, shaping piece and is arranged between top layer and shaping piece.
The present invention also provides a kind of method for the manufacture of pant-type absorbent article, each article comprise basal body structure, described basal body structure comprises the anter with front edge and the first and second lateral edges, there is the rear panel of back edge and the first and second lateral edges, and the crotch's sheet be arranged between anter and rear panel, described basal body structure has the absorbent core components be combined as a whole, described method comprises trousers forming process, it comprises formation basal body structure and the first and second lateral edges of anter is engaged to corresponding first and second lateral edges of rear panel, and process absorbent core components is combined on basal body structure.
According to the present invention, trousers forming process comprises following additional step:
A) by the incompatible continuous web making Connection Element blank that two continuous webs of the weldable material of the relation faced by being connected along the paired weld bond extended striding across Connection Element blank cross-sectionly;
B) between often pair of weld bond, the width of Connection Element blank is cut off to form independent Connection Element blank;
C) along the first edge of described matrix width, described independent Connection Element blank is fixed on the precalculated position on matrix width, described weld bond is arranged on the transverse direction of matrix width simultaneously;
D) longitudinally matrix width described in fold line is aimed at the first edge of described matrix width to make the second edge of described matrix width;
Described matrix width is fixed on described Connection Element blank by described second edge e) along described matrix width;
F) cut off described matrix width between the described weld bond on described Connection Element blank to be separated with described matrix width to make independent pants type article.
Connection Element blank is permanently affixed on described matrix width in step c) and/or step e).
Also comprise the trousers figuration manufacture step of any routine according to method of the present invention, such as, cut matrix width to form leg opening, flexible member to be connected to leg and waist opening place, etc.
Accompanying drawing explanation
In more detail the present invention is described below with reference to accompanying drawing, in figure
Fig. 1 represents and is in the straightened condition with the collateral joints opened according to pants type diaper of the present invention,
Fig. 2 represents that the diaper shown in Fig. 3 has closed collateral joints,
Fig. 3 represents Connection Element blank width,
Fig. 4 represents the Connection Element blank block be connected on matrix width,
Fig. 5 represents the details of the collateral joints in pants type article,
Fig. 6 represents the alternate embodiment of Connection Element blank; And
Fig. 7-9 schematically shows the method for measuring the intensity according to the collateral joints in pants type article of the present invention.
Detailed description of the invention
Pants type diaper 1 shown in Fig. 1 and 2 is designed to the bottom surrounding wearer's trunk as conventional underwear.In FIG, side towards wearer when namely being put on from article from inner side illustrates diaper 1, and in fig. 2, from outside or towards coat side, diaper 1 is shown, described outside or be towards the side away from wearer when putting on diaper towards coat side.
Diaper 1 is illustrated in FIG and is in straightened condition, has the collateral joints opened and has any pre-stretched elastic parts stretched.In fig. 2, diaper 1 is illustrated and is in three-dimensional state, appearance when being put on by user as it.
Diaper 1 has anter 2, rear panel 3 and in anter and rear panel 2, extends and also compare crotch's sheet 4 of relative narrower with anter and rear panel 2,3 between 3.Anter and rear panel 2,3 are arranged to the buttocks of capping user and extend with the bottom around wearer's trunk at the abdominal part of wearer and back.
Diaper 1 also comprises the core region 5 extending to anter 2 and rear panel 3 from crotch's sheet 4.Anter and rear panel 2,3 form extending and capping and the part around core region 5 towards coat side at diaper 1 of matrix 6.Matrix 6 comprises anter 2, rear panel 3, crotch's sheet 4 and is fixed on anter and rear panel 2, the elastic waist belt 7 on 3.Anter and rear panel 2, each in 3 has edge of waist 8 and a pair lateral edges 9 respectively.
Term " sheet " is used to indicate the funtion part of diaper matrix at this, term " region " and " part " are used to indicate the special characteristic position (such as core) of diaper on matrix or describe the required location of the diaper specific part relevant to user health simultaneously.Sheet can be independent ingredient or the integral part of matrix.Region or part completely or partially can comprise one or more.
When ingredient be bonded with each other, adhere to or fixing time, they be by any appropriate ways (such as bond), by the independent sector sewed up or combined by ultrasonic fusing or thermal welding.Term " joint " also comprises the junction surface (the tape junction surface, snap fasteners etc. of such as shackle junction surface, Reclosable) of separable junction surface (such as separable collateral joints) and Reclosable.Mutually being arranged in ingredient over each other without the need to being combined, however, broadly should being interpreted as also comprising the ingredient obtaining combining at this term " layout " adopted.
Anter and rear panel 2,3 are bonded with each other in side face seam 10 along their lateral edges 9 as shown in Figure 2.Elastic waist belt 7 comprises and is separately fixed at front waist panel 7a in anter 2 and rear panel 3 and back waist panel 7b.Front waist panel and back waist panel 7a, 7b are also bonded with each other by side face seam 10.By making anter and rear panel 2,3 engage with waist panel 7a, 7b, pants type diaper 1 has waist opening 11 and a pair leg opening 12.
Side face seam 10 is manufactured according to the present invention, and comprises Connection Element 13.Connection Element 13 comprises the thermoplastic of weldable and has the Part II 15 being permanently affixed at the Part I 14 on the inner side of anter 2 along lateral edges 9 and being permanently affixed at along respective side edges 9 on the inner side of rear panel 3.The first and second each parts 14,15 in Connection Element 13 are bonded in side face seam 10 by thermal welding or ultrasonic fusing.
Fig. 1 represents that diaper 1 is in straightened condition, and simultaneously side face seam 10 is opened and any elastic components connected under tensile stress is on substrate 6 elongated the overall dimension of matrix 6.Fig. 2 represent pants type diaper 1 show side face seam 10 complete and allow any obtain stretch flexible member relax and assemble matrix material with the appearance of the leg and waist opening 11,12 that form elastification.
Anter and rear panel 2,3 are preferably made up of the elastic web materials of the elastic laminate such as comprising elastic film and nonwoven layers.Elastic laminate can be type disclosed in international patent application No.WO03/047488.The elastic film layer stretched between two non-elastic fabric shape layers by increment makes described lamination.Pass between intermeshing gear roller by making lamination and implement the stretching of described increment.
In U.S. Patent No. 5,143,679, No.5,156,793, No.5,167,897, No.5,422,172, No.5,592,690, No.5,634,216 and No.5,861, also disclosing in 074 is stretched by increment realizes the activation of elastic laminate.Non-elastic fabric shape layer ruptures wholly or in part or tears in activation process, and lamination elasticity is after the activation determined primarily of the elasticity of elastic film layer.
Anter and rear panel 2,3 preferably at least on the direction of edge of waist 8 elasticity can stretch, but can also to stretch perpendicular to edge of waist 8 elasticity on the direction of lateral edges 9.
Elastic film on elastic laminate preferably has perforation to provide breathability on lamination.This point directly can combine accomplished with lamination process when such as one or two nonwoven web is combined on elastic film by extrusion coating.By making the elastic layer of combination and non-woven material on vacuum lamination roller through to make elastic layer be in fusing or semi-molten state implements perforation step simultaneously.This process in U.S. Patent No. 5,733, disclose in 628 and cause elastic film to be formed three-dimensional lamination layer with holes.
Crotch's sheet 4 is by making at crotch seam 17 and the crotch material 16 that anter and rear panel 2,3 engage.Therefore, can be the crotch material 16 of non-elastic material (such as nonelastic nonwoven) be arranged in article core region 5 and with elastic front and rear panel 2,3 slightly overlapping.Such as described joint can be formed by ultrasonic fusing, bonding or similar approach by any appropriate ways.Alternatively, outer nonwoven material can extend continuously on anter and rear panel 2,3 and crotch's sheet 4, makes at sheet 4, and 2, without the need to any seam or junction surface 17 between 3.
In the example shown, elastic waist belt 7 comprises by one or more elongate elastic members 18(such as elastic threads or band) realize first and second strands (pile) of the nonelastic nonwoven substantially of elastification.First and second strands can be formed by folding monolayer material itself or can by two independently material webs formed.Flexible member 18 is arranged on belt 7 with extended state, makes them make the non-woven material on belt 7 shrink and assemble when being allowed to lax, as shown in Figure 2.
Elastic waist belt 7 when flexible member 18 be in elongated condition and between material clip in anter and the rear panel nonwoven stock on belt be fixed on anter and rear panel 2, on 3.Alternatively, elastic waist belt 7 can be obtain prefabricated and respectively with anter and the outside of rear panel 2,3 or the ingredient of interior side engagement.Belt 7 and anter and rear panel 2, the belt junction surface 19 between 3 can be formed by any appropriate ways (such as by ultrasonic fusing, heat welded or bonding).Another selects to be by being also anter and rear panel 2,3 part and the one or more non-elastic nonwoven layer forming its continuous extension form belts 7.It will also be appreciated that by the double folding part of the edge of waist 8 along elastic front and rear panel 2,3 and supplement described folding part optionally by additional elastic component and assign to form elastic waist structure.
Flexible member 20 is also arranged in the edge of leg opening 12 and plays and make leg opening 12 have elastic effect.The flexible member at leg opening 12 place can be the conventional elastic means (such as elastic threads, band, foam band or like) of any type.
The flat extension in core region 5 is limited by the liquid-tight shaping piece 21 be arranged between absorbent cores 22 and matrix 6.Liquid-tight shaping piece 21 has rectangular shape and absorbent cores 22 is hourglass shape.Can the top layer 23 of transflective liquid be arranged on core 22 and liquid-tight shaping piece 21.Therefore, liquid-tight shaping piece 21 is in absorbent cores 22 and below being directly in outside absorbent cores 22 adjacent area.
Can the top layer 23 of transflective liquid can be made up of any known materials (such as nonwoven material layer, perforated plastic film, Web materials, fibre bundle or similar material) realizing described object.Certainly, top layer 23 can also be made up of the lamination of two panels or the identical or different material of multi-disc.
Liquid-tight shaping piece 21 can by liquid-tight plastic sheeting, scribble liquid barrier materials non-woven sheet or other certain can bear liquid infiltration flexible material sheet form.But advantageously liquid-tight shaping piece 21 has certain breathability, namely allow steam through sheet 21.
Absorbent cores 22 can be made up of absorbent material (such as cellulose fluff pulp, napkin (tissue), absorbent foam etc.).Absorbent cores can also comprise superabsorbent fibers, namely can the large several times of their own wts of absorptance body fluid and form the polymeric material of hydrogel.This superabsorbent fibers exists usually in granular form, but also can adopt fiber, thin slice, granule and form of film.And absorbent cores 22 can comprise nonabsorbable parts, such as hardener, setting composition, binding agent etc.The loose structure of multiple absorbing fluid can also be comprised, such as fiberfill block, open celled foam (open-cellfoam) or similar structures in core.
Top layer 23, shaping piece 21 and absorbent cores 22 can be formed independent ingredient or " the core bag " on diaper matrix joined integrally subsequently.Each ingredient comprised in core bag can be interconnected by any usual manner (such as by binding agent combination, ultrasonic fusing or thermal welding).Certainly, core bag can comprise other ingredient except said.Such as, can comprise can the sheet of transflective liquid, flexible member, dimensionally stable element, shaping element or similar portions for core bag.
Except in conjunction with except the ingredient described in the diaper in Fig. 1 and 2, any further feature known in the art and element can be comprised according to pant-type absorbent article of the present invention.The example of these supplementary features is for keeping the article after using to be in rolling or the disposable belt of folded state or the disposable apparatus of bag form, dissimilar separator (there are the separator of degree of tightness, shaping piece etc. along edge of waist in such as outstanding side) and can be used to carry out again fastening additional fastening elements to the article be opened of tearing by side face seam.
The continuous web 25 that Fig. 3 represents Connection Element blank and the Connection Element blank 26 cut off from continuous web 25.Continuous web 25 is by the incompatible formation that to be connected by two continuous webs 27,28 in the weldable material in the face of relation along the paired weld bond 29,30 of a cross-section extension striding across Connection Element blank 26.According to another alternate embodiment of the present invention shown in Fig. 6, each weld bond can be combined into a weld bond 40, described weld bond 40 has and independent weld bond 29, the independent weld bond 29 shown in 30 Yu Fig. 3, the width that the combined width in the non-welding gap between 30 is consistent.Weld bond 29,30,40 can be made up of the independent discontinuous joint portion shown in Fig. 3 and 6.Independent joint portion can be point, dotted line or along weld bond 29,30,40 other graphic elements arranged.Alternatively, weld bond can be continuous lines joint portion.
By cutting often pair of weld bond 29, between 30 or between each wide weld bond 40 25 cuts off independent Connection Element blank 26 from the continuous web 25 of Connection Element blank, to form the independent Connection Element blank of each self-contained one group two independent weld bonds 29,30 or single wide weld bond 40.
In the embodiment shown in Fig. 3 and 4, the continuous web 25 of Connection Element blank has the transmission the selected joint portion 31 of less weak spot joint portion form of edge placement along 25.Transmission conjugate 31 prevents weld bond 29 in process steps subsequently, and the non-binding part that the layer 27,28 of 30 any sides is other is separated.Transmission conjugate 31 combines along weld bond 29 preferably by thermal or ultrasound wave, and 30 are formed with joint portion simultaneously.
Independent Connection Element blank 26 is introduced into the trousers forming process for the formation of pant-type absorbent article subsequently and in the layer 28 on each Connection Element blank 26 one forever or is removably fixed on matrix 32, as shown in Figure 4.Matrix 32 is shown schematically the border had between the otch of leg opening 12 and the independent basal body structure 6 represented by dotted line 37 in the diagram.The core components comprising core 22, top layer 23 and rear panel 21 is illustrated and is arranged between leg otch 12.Connection Element blank 26 is fixed on precalculated position along the first edge 33 of matrix 32, and the position residing on final pant-type absorbent article of this position and side face seam 10 is corresponding.Connection Element blank 26 utilizes the weld bond 29,30 or 40 arranged on the transverse direction of matrix 32 to be fixed.Connection Element blank 26 can be fixed on matrix 32 before or after leg otch 12 has been formed on 12.In addition, leg otch 12 can be formed while 12 are in the state shown in Fig. 4, or can matrix 32 longitudinally fold line 35 obtain folding after follow-up formation in trousers forming process.If Connection Element blank 26 engaged with matrix 32 before formation leg otch 12, then leg otch can be formed partially by a part for Connection Element blank 26.
Realize fixing preferably by binding agent (such as thermoplastic hot melt adhesive or latex).But, the fixing of other type can be expected, such as thermal welding, ultrasonic fusing or stitching.Describedly fixing can be permanent or can be formed to allow to open.The joint portion of matrix between 32 and each Connection Element blank 26 occupies larger area, thus can provide solid and reliable joint portion.In the conventional use procedure of pants type article, the shear stress between the material on matrix width and Connection Element is only born in joint portion.
After on the first edge that Connection Element blank 26 has been fixed on matrix 32, matrix 32 longitudinally fold line 35 is folding to make the first edge 33 of the second edge 34 of matrix 32 and matrix 32 aim at and cover Connection Element blank 26.
Matrix 32 is fixed on another layer 27 of Connection Element blank 26 along the second edge 34 of matrix 32 forever or removably subsequently.
Finally, folding and matrix after assembling 32 is along the weld bond 29 on Connection Element blank 26, and the line 37 between 30 obtains on transverse direction cutting off that independent pants type article and matrix 32 is separated.In the embodiment of each self-contained single wide weld bond 40 of Connection Element blank 26, by weld bond 40, preferably make independent pants type article along the cutting width placed in the middle on weld bond 40 of the line 37 shown in Fig. 6.
Manufacture process can comprise other step certainly, such as, apply waist elastic, apply leg elastic, separator elastic component etc.For pant-type absorbent article, waist elastic can be applied with preform elastic waist belt form continuously to matrix width, or apply continuous or discrete elastic component at one or two edge 32,33 place of matrix 32 to matrix ingredient.Can to a matrix 32 applying waist elastic before or after Connection Element blank engages with width.
In final pant-type absorbent article, each part of the wide weld bond 40 of each weld bond 29,30 or combination forms side face seam 10.Therefore, the invention provides prefabricated side face seam and on pant-type absorbent article, combine the device of prefabricated side face seam.This point is very favourable in trousers forming process, because welding step is the quite slow process steps of restriction manufacturing speed.By manufacturing separately Connection Element blank 26, Connection Element blank 26 can subsequently to be introduced into trousers forming process than the speed higher by alternate manner.Each Connection Element blank 26 forms two Connection Elements 13, they be included in from matrix width cutting or cut off adjacent absorbent article on side face seam in.
Fig. 5 represents the side face seam 10 of lateral edge portions and the Connection Element 13 with basal body structure 36.Side face seam 10 is formed by combination technology, thus is formed and have sufficient intensity and use any stress caused and the joint portion that preferably can be stripped to controllably when taking off article with it from wearer or tear to bear by the routine of absorbing articles.By selecting the material with high thermoplasticity content being used for Connection Element, thermal welding technology can be utilized to obtain the joint portion with required peel strength, but peel strength can obtain controlling to allow manual unlocking joint portion.
Connection Element can comprise or comprise thermoplastic film, but preferably by the non-elastic fiber nonwoven web comprising thermoplastic fibre.Example for the suitable thermoplastic polymer of nonwoven web and thermoplastic film is polyethylene, polyester, polypropylene and polyolefin homopolymer and copolymer.Especially suitable nonwoven web comprises the thermoplastic fibre of polypropylene and polyethylene fibre mixture.Weldable nonwoven web has the thermoplastic fibre of high-load and comprises the thermoplastic fibre of at least 50% and the thermoplastic fibre of preferred at least 80%.
Method of testing describes
flexibility test
The method measures the performance of elastomeric material under Study of Cyclic Loading and unloading cycle.Sample is stretched to predetermined elongation and the execution cycle moves between 0 and described predetermined elongation.Compression and decompression power needed for record.Measure the permanent namely permanent elongation amount of flaccid material.
Employing can be moved and the tensile tester LloydLRX of printer/drawing apparatus or software display is housed the execution cycle.Sample preparation is completed by length sample being cut into the distance 20mm between the width of 25mm and fixture preferably on specific thrust tester.
According to device description, tensile tester is demarcated.Parameter (compression and decompression power) needed for test is adjusted to as follows:
Crosshead speed: 500mm/min
Clamp distance: 50mm
Prestrain: 0.05N
Sample evidence labelling to be placed in fixture and to guarantee that sample is placed in the middle and obtain perpendicular fastener in fixture.Tensile tester starts and complete three cycles between 0 and the first predetermined elongation loaded equaling the highest restriction.Before the last cycle, sample relaxes 1 minute, subsequently by stretching sample until detect that the power of 0.1N measures permanent elongation, and read described elongation.
Elastomeric material is defined as so a kind of material, and it has the lax rear permanent elongation being less than 10% experience the elongation of 30% in above-mentioned test after.The elongation of 30% means the length be elongated to than sample initial length long 30%.
Non-elastic material is such material, and it has the lax rear permanent elongation being greater than 10% after the elongation of experience 30%.
tensile strength, collateral joints
The tensile strength (with reference to ASTMD882) of collateral joints is measured according to method of the present invention.
Device:
The tensile tester be connected with computer
Crosshead speed: 500mm/min
Clamp distance: 50mm
Sample cutting machine or cutting tool, precision ± 0.1mm
prepared by sample
Having in the region according to Connection Element 13 of the present invention, as shown in Figure 7, cut sample 41 from pant-type absorbent article 1.Specimen width is 25.4mm and distance 50mm between fixture on preferred length specific thrust tester Instron4301.Fig. 8 and 9 shows test sample book 41 and how to be fixed on fixture 42.
Should check that cutting blade is unspoiled, because sample edge evenly and be very important without break notches.Before test, sample places at least 4h under 50%RH ± 5%RH and 23 DEG C ± 1 DEG C condition.
technique
Tensile tester is demarcated according to device description and is placed in zero.The fixture of silk ribbon or similar material is had to prevent material from sliding by adopting cover.Sample to be arranged in fixture and to guarantee that it can not tilt or level land does not obtain fastening, starting tensile tester.Tensile tester starts and shut down (if not automatic control) after Materials Fracture.If possible, the measurement result that initial failure (such as sample ruptures or is damaged in sample preparation procedure on clip) produces is ignored.
By result below tensile tester/Computer display:
-maximum, force, N/25.4mm
Elongation under-maximum, force, %
-disruptive force, N/25.4mm
-elongation under disruptive force, %
-flex point, N/%
The tensile strength of each collateral joints is designated as the power made needed for the fracture of junction surface.
The tensile strength of collateral joints on the direction of cross-section side face seam 10 preferably should more than 5N/25.4mm, more preferably minimum tensile strength on average can be at least 15N/25.4mm or 20N/25.4mm more than 10N/25.4mm or 12N/25.4mm, and the fracture strength of the cladding material wherein in pant-type absorbent article on transverse direction be preferably greater than the tensile strength for being arranged on the junction surface between the side face seam on Connection Element 10 and the material on Connection Element and article anter and rear panel.
Claims (12)
1. the method for the manufacture of pant-type absorbent article, each pant-type absorbent article comprises basal body structure (6), described basal body structure (6) comprises the anter (2) with front edge (8) and the first and second lateral edges (9), there is the rear panel (3) of back edge (8) and the first and second lateral edges (9), and be arranged in anter and rear panel (2, 3) the crotch's sheet (4) between, described basal body structure (6) has the absorbent core components (22) be combined as a whole, described method comprises trousers forming process, described trousers forming process comprises formation basal body structure (6) and first and second lateral edges (9) of anter (2) is engaged to corresponding first and second lateral edges (9) of rear panel (3), and absorbent core components (22) is combined on basal body structure (6), it is characterized in that, described trousers forming process comprises:
A) the paired weld bond (29 of continuous web (25) the cross-section extension of Connection Element blank (26) is striden across by edge, 30) connect two continuous webs (27,28) of the weldable material of the relation faced by being the incompatible continuous web (25) making Connection Element blank (26);
B) between often pair of weld bond (29,30), the continuous web (25) of Connection Element blank (26) is cut off to form independent Connection Element blank (26);
Described independent Connection Element blank (26) is fixed on matrix width (32) in precalculated position by the first edge c) along matrix width (32), described weld bond (29,30) is arranged on the transverse direction of matrix width (32) simultaneously;
D) longitudinally the folding described matrix width (32) of fold line (35) is aimed at first edge (33) of described matrix width (32) to make second edge (34) of described matrix width (32);
Described matrix width (32) is fixed to described Connection Element blank (26) by described second edge (34) e) along described matrix width (32);
F) the described weld bond (29 on described Connection Element blank (26), 30) cut off described matrix width (32) between to be separated with described matrix width (32) to make independent pant-type absorbent article (1)
Wherein, described Connection Element blank (26) is in step c) and step e) in be permanently affixed on described matrix width.
2. the method for claim 1, is characterized in that, described in be permanently fixed and completed by binding agent.
3. the method for claim 1, is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises thermoplastic film.
4. the method for claim 1, is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises thermoplastic nonwoven web.
5. the method as described in claim 3 or 4, is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises the thermoplastic polymeric material of at least 50%.
6. method as claimed in claim 5, it is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises the thermoplastic polymeric material of at least 80%.
7. the method for the manufacture of pant-type absorbent article, each pant-type absorbent article comprises basal body structure (6), described basal body structure (6) comprises the anter (2) with front edge (8) and the first and second lateral edges (9), there is the rear panel (3) of back edge (8) and the first and second lateral edges (9), and be arranged in anter and rear panel (2, 3) the crotch's sheet (4) between, described basal body structure (6) has the absorbent core components (22) be combined as a whole, described method comprises trousers forming process, described trousers forming process comprises formation basal body structure (6) and first and second lateral edges (9) of anter (2) is engaged to corresponding first and second lateral edges (9) of rear panel (3), and absorbent core components (22) is combined on basal body structure (6), it is characterized in that, described trousers forming process comprises:
A) by the incompatible continuous web (25) making Connection Element blank (26) that two continuous webs (27,28) of the weldable material of the relation faced by being connected along the single weld bond (40) of continuous web (25) cross-section extension striding across Connection Element blank (26);
B) between each described single weld bond (40), the continuous web (25) of Connection Element blank (26) is cut off to form independent Connection Element blank (26);
Described independent Connection Element blank (26) is fixed on matrix width (32) in precalculated position by the first edge c) along matrix width (32), and described weld bond (40) is arranged on the transverse direction of matrix width (32) simultaneously;
D) longitudinally the folding described matrix width (32) of fold line (35) is aimed at first edge (33) of described matrix width (32) to make second edge (34) of described matrix width (32);
Described matrix width (32) is fixed to described Connection Element blank (26) by described second edge (34) e) along described matrix width (32);
F) cut off described matrix width (32) in the described weld bond (40) on described Connection Element blank (26) to be separated with described matrix width (32) to make independent pant-type absorbent article (1),
Wherein, described Connection Element blank (26) is in step c) and step e) in be permanently affixed on described matrix width.
8. method as claimed in claim 7, is characterized in that, described in be permanently fixed and completed by binding agent.
9. method as claimed in claim 7, it is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises thermoplastic film.
10. method as claimed in claim 7, it is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises thermoplastic nonwoven web.
11. methods as described in claim 9 or 10, it is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises the thermoplastic polymeric material of at least 50%.
12. methods as claimed in claim 11, is characterized in that, the continuous web (25) of described Connection Element blank (26) comprises the thermoplastic polymeric material of at least 80%.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006800567519A CN101568314A (en) | 2006-12-22 | 2006-12-22 | A pant-type absorbent article and a method for producing pant-type absorbent articles |
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| CNA2006800567519A Division CN101568314A (en) | 2006-12-22 | 2006-12-22 | A pant-type absorbent article and a method for producing pant-type absorbent articles |
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| JP6412861B2 (en) * | 2015-12-28 | 2018-10-24 | ユニ・チャーム株式会社 | Absorbent articles |
| JP6704440B2 (en) * | 2018-10-31 | 2020-06-03 | ユニ・チャーム株式会社 | Absorbent article |
| EP4048221B1 (en) * | 2019-10-22 | 2024-06-05 | Essity Hygiene and Health Aktiebolag | Pant-type garment and method for the production thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2257652A (en) * | 1991-07-15 | 1993-01-20 | Uni Charm Corp | Welding components in pants-type garments |
| EP0625346A1 (en) * | 1993-05-19 | 1994-11-23 | Uni-Charm Corporation | Welding method for disposable diapers |
| CN1674842A (en) * | 2002-08-16 | 2005-09-28 | 金伯利-克拉克环球有限公司 | Disposable absorbent pant having refastenable seams |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7201744B2 (en) * | 2001-12-28 | 2007-04-10 | Kimberly-Clark Worldwide, Inc. | Refastenable absorbent garment and method for assembly thereof |
| ES2390152T3 (en) * | 2005-03-02 | 2012-11-07 | Sca Hygiene Products Ab | Hygienic panties for single use |
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2006
- 2006-12-22 CN CN201410064403.2A patent/CN103876897B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2257652A (en) * | 1991-07-15 | 1993-01-20 | Uni Charm Corp | Welding components in pants-type garments |
| EP0625346A1 (en) * | 1993-05-19 | 1994-11-23 | Uni-Charm Corporation | Welding method for disposable diapers |
| CN1674842A (en) * | 2002-08-16 | 2005-09-28 | 金伯利-克拉克环球有限公司 | Disposable absorbent pant having refastenable seams |
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