CN103655059A

CN103655059A - Method for producing inserting pieces

Info

Publication number: CN103655059A
Application number: CN201210319591.XA
Authority: CN
Inventors: P·伦贝里; 罗健宏
Original assignee: SCA China Holding Co Ltd
Current assignee: SCA China Holding Co Ltd
Priority date: 2012-08-31
Filing date: 2012-08-31
Publication date: 2014-03-26
Anticipated expiration: 2032-08-31
Also published as: TW201410223A; WO2014032916A1; CN103655059B

Abstract

The invention provides a method for producing inserting pieces and also provides a continuous laminated product. The continuous laminated product comprises a first layer, a second layer, triangular or trapezoid absorbing cores arranged in a staggered mode and clamped between the first layer and the second layer, gaps separating discontinuous absorbing cores and extending elastic elements located at the centers of the gaps.

Description

Produce the method for inserting sheet

Technical field

The present invention relates to produce the method for absorbent article, specifically produce the method for inserting sheet.The invention still further relates to the continuous laminating thing that inserts sheet for the production of the present invention.

Background technology

The reusable diaper of being made by cloth is used for many years.But reusable cloth diaper has the effort processed, need to effectively wash and sterilize and pollute diaper the shortcoming such as to reuse.

The disposable urine napkin of introducing decades recently solves these problems to a certain extent.Conventionally, after use, can former state abandon the disposable urine napkin of pollution, and not need washing or sterilization.In addition, multiple existing disposable urine napkin is considered to leave skin and/or be better than cloth diaper aspect skin care compositions and methods protection skin in transmission and storage of urine, can help thus to avoid for example diaper rash of dermatosis.

Due to economic cause, the existing material that is mostly the most of origin of disposable urine napkin comes from oil is made, for example polypropylene and/or polyethylene.These materials occur with the form of non-woven fabrics, layer or film conventionally.

The concern of having risen relevant environment in more nearest years.The production of diaper and use no exceptionly, especially considers the increase of Number of infants.A kind of viewpoint is to use disposable urine napkin harmful to environment, because the material source that is commonly used to manufacture diaper is in non-renewable resources, and in its manufacture process, needs a large amount of energy.In addition because the common not reproducible use of disposable urine napkin or recovery, some people think they use can to treatment facility as refuse landfill forms burden dissatisfactory.

Two-piece type absorbent article has been known in the art for many years.For example, WO2010/083290, WO2010/083287, WO2010/083260 and WO2010/083293 disclose the two-piece type absorbent article that comprises outer covering piece and absorb insert, wherein insert can have the effluent that prevents wearer make dirty containing of described outer covering piece and absorption piece, make described outer covering piece flow out and can reuse after described plug-in unit is replaced at effluent, and described plug-in unit and/or described outer covering piece can have the property contained of raising, absorbability, the parts of material economy and/or stickiness, it makes them is asymmetric with respect to its corresponding axis of pitch, and can have and instruct user according to be orientated to install the parts of plug-in unit and/or outer covering piece with respect to wearer's correct front and back.

Consider above-described problem, advantageously can obtain wearable absorbent articles, it provides the advantage that can bear for care-giver, overcomes its each defect simultaneously.The structure that can simplify production process and/or reduce old is provided also advantageously.

Summary of the invention

The present invention relates to produce the method for inserting absorbent article, comprise the following steps:

A) provide continuous ground floor;

B) be fixed on ground floor separated absorbent cores by triangle or trapezoidal absorbent cores are staggered;

C) mid portion that the flexible member of stretching is fixed on to gap on ground floor is to form Hookean region, and each flexible member stretching has the direction of the machine direction of being basically perpendicular to;

D) second layer is laminated on ground floor, absorbent cores and flexible member, so that laminate to be provided;

E) laminate is cut obtain the individual insertion absorbent article all at two sides with Hookean region along gap.

In one embodiment, flexible member is elastic foam, elastica, elastica or its combination.

In one embodiment, the stretch ratio of the flexible member of stretching is 1.5-4.0, preferably 1.75-2.5.

In one embodiment, flexible member is at step c) in be fixed on ground floor before from the cut sheet that becomes of continuous elastic omentum.

Another aspect of the present invention relates to continuous laminate, and it comprises:

Ground floor and the second layer,

Staggered triangle or trapezoidal absorbent cores, it is clipped between ground floor and the second layer,

The gap of separating discontinuous absorbent cores,

Be positioned at the flexible member of the stretching of gap core, each flexible member stretching has the longitudinal direction of the machine direction of being basically perpendicular to.

In one embodiment, laminate also comprises any or multiple following element: fixed system, the absorption and distribution layer between absorbent cores and the second layer.

Accompanying drawing explanation

Fig. 1 has shown the laminate forming in production method of the present invention, and wherein downward layer is ground floor, and the layer making progress is the second layer.

The specific embodiment

definition

For illustrative purposes, following term has described implication:

" insertion sheet " used herein refers to the element of absorbent article, and it is applicable to hold and/or absorbs urine, feces, menstruation or any its combination, be applicable to can be used as modular unit be mounted to absorbent article main leaf and can be separated with it.

" machine direction " used herein refers to the direction of material flow in production method of the present invention.In addition staggered relatively and mobile also can be described as towards machine direction circulation of material, the i.e. downstream from the upstream flow of the inventive method to the inventive method.

" fixed system " used herein refers to realize and the first structure fixed movably, connected or remains to the second structural system.Described system can have single retaining element, for example, first, be structurally applicable to be bonded in one or more surperficial bonding sheets in the second structure, or in the first structure, be applicable to be buckled in one or more surperficial hooks or hook sheet in the second structure.In the mode of example, in the first structure, be applicable to all or part of any structure of catching and keeping the second structure, such as pocket, band, hook, clasp etc., is all " fixed system " used herein.Described system also can comprise two or more retaining elements, such as each element (as VELCRO) of hook-loop fixed system, have apply the jointing material on it each surface, convex-concave button retaining element, button and buttonhole, groove or ring, other can secure fit part etc.Other embodiment of retaining element comprise slide fastener elements, " zip " co-operating member, ring, post, bag, rope or bar, micro-fixture, large fixture and as disclosed retaining element in WO1998/029081, WO2002/047597 etc.

" user " used herein refers to the people of wearable absorbent article as herein described.

Fig. 1 has shown that the present invention inserts the top view of sheet, and its part as two-piece type absorbent article is used.Downward layer is ground floor, and the layer making progress is the second layer.

With reference to figure 1, demonstrated machine direction MD.Ground floor is along machine direction MD circulation, from the below of figure to the top of figure.When supplying with, ground floor is continuous, therefore inserts sheet and can produce in a continuous manner.

Ground floor can be top layer or the bottom that inserts sheet.

" bottom " used herein refers to liquid, for example, urinate, can not be from the lamella passing perpendicular to the direction of this layer plane at liquid contact point under normal service condition.It can be the monolayer of liquid impermeability material, or can be wherein at least one deck and do not see through the laminated multi-layer structure of liquid.As known in the state of the art, bottom can comprise fluid permeability skin and liquid impermeability internal layer, and they are by suitable the combining of layer binding agent.Binding agent can continuous coating, or can be used as the discontinuous coatings such as globule, spraying, parallel eddy current.Suitable binding agent is known in the state of the art and commercially available obtainable, for example, see and obtain from German Henkel AG & Co.Huo U.S. 3M Corporate.Fluid permeability skin can be any suitable material that conventional cloth specimen quality is provided.The example of a this material be 20gsm (gram/m) spunbond polypropylene non-woven fabric.Skin also can be made by the material of making fluid permeability internal layer.And the outer liquid that is not necessary for can permeability, but wish that it provides the quality of relative cloth specimen for user.

" top layer " used herein refers to the permeable non-woven fabrics of liquid, and it is shaped to and covers the surface of inserting sheet and contact skin.Natural fiber or synthetic fibers can be used for forming the non-woven fabrics on top layer.Natural fiber comprises such as cotton, cellulose (wood pulp), Pilus Caprae seu Ovis or silk etc.Synthetic fibers can comprise for example polypropylene (PP), polyethylene (PE), nylon, polyester (PET) or acrylic aldehyde.Synthetic fibers also can comprise PE/PP hybrid nonwoven cloth, PE/PET hybrid nonwoven cloth or see through the biconstitutent fibre (composite fibre mixed fiber) that suitably mixes above-mentioned material acquisition.

With reference to figure 1, at step b) in discontinuous absorbent cores be fixed on ground floor.Absorbent cores is triangle or trapezoidal, is staggered on ground floor.In other words, absorbent cores forms a line, and wherein each absorbent cores is in the direction horizontal with machine direction MD, and the opposite direction of the absorbent cores adjacent with each.In this way, not waste of the ground floor in production method of the present invention and the second layer.Therefore between absorbent cores, form the gap of strip, this gap is not orthogonal to machine direction MD.

Absorbent cores useful binders is fixed.Binding agent can continuous coating, or can be used as the discontinuous coatings such as globule, spraying, parallel eddy current.Suitable binding agent is known in the state of the art and commercially available obtainable, for example, see and obtain from German Henkel AG & Co.Huo U.S. 3M Corporate.Absorbent cores can be fixed by each fixing point, and the shape that makes absorbent cores of the pattern of fixing point is indeformable when skin stretches.

At step c) in, the flexible member of stretching is fixed on ground floor, and its direction is basically perpendicular to machine direction MD.The core in the gap of the flexible member stretching between adjacent absorbent cores, to form Hookean region A.Flexible member also useful binders is fixed.Binding agent for flexible member is also known in the state of the art and commercially available obtainable, can be identical or different with the binding agent for absorbent cores.

Term used herein " elasticity " refers to any material, it is stretchable at least about the extended length of 110% its lax raw footage (being stretchable to over raw footage 10%) when being subject to bias force, and do not break or rupture, and when removing suffered power, recover its extended length at least about 40%.For example, a kind of material of the 100mm of having initial length may extend at least 110mm, and after the power of removing, can be retracted to the length of 106mm.

Before being fixed on ground floor, flexible member can be used as continuous elastic omentum and provides, and then cutly becomes suitable sheet.After this, flexible member is stretched with suitable stretch ratio, thinks that inserting sheet provides power.The stretch ratio of the flexible member stretching is 1.5-4.0, preferably 1.75-2.5." stretch ratio " used herein refers to the ratio of the length of the length of the rear flexible member that stretches and the front flexible member that stretches.

Flexible member is well known in the prior art, and is commercially available.The optional own elasticity foam of flexible member, elastica, elastica and its combination.

In steps d) in, the second layer is laminated on ground floor, absorbent cores and flexible member.Preferably, the second layer has the width identical with ground floor, makes the second layer can cover well ground floor, absorbent cores and flexible member, and without any waste or not enough.

The second layer can be top layer or the bottom that inserts sheet, and condition is that ground floor is top layer or bottom when different with the second layer.In other words, when ground floor is top layer, the second layer is bottom; Vice versa.

Second layer useful binders is fixed to ground floor, absorbent cores and flexible member.Binding agent can be with identical or different for the binding agent of absorbent cores and flexible member.In this way, form the laminate of ground floor, the second layer, absorbent cores and flexible member therebetween.

At step e) in, laminate is cut into the individual sheet that inserts.Cutting is carried out along the line of cut 1 in the gap between absorbent cores, respectively inserts thus sheet and has a complete absorbent cores, and all have Hookean region A at two sides.

In one embodiment, through Hookean region A cutting laminate.Through after Hookean region A cutting, with the uneven direction in absorbent cores edge on produce asymmetric contractility, referring to Fig. 1.Therefore, the bending of absorbent cores and insertion sheet is better.Flexible member extends to the edge of top layer or bottom, and described edge rises and at the intermediate formation barrier of product.

Another aspect of the present invention relates to continuous laminate, comprising: ground floor and the second layer; Staggered triangle or trapezoidal absorbent cores, it is clipped between ground floor and the second layer; The gap of separating discontinuous absorbent cores; The flexible member stretching is positioned at the core in gap, and each flexible member stretching has the longitudinal direction that is basically perpendicular to machine direction MD.

Ground floor, the second layer, absorbent cores, gap and flexible member are as mentioned above.

In a preferred embodiment, laminate also comprises any one or more following elements: fixed system, the absorption and distribution layer between absorbent cores and the second layer.

Absorption and distribution layer is as known in the art, is the subgrade that is designed to improve liquid management in health product.Absorption and distribution layer acceleration liquid obtains and distributes to absorbed layer, to increase comfort level and the degree of freedom of consumer.It typically is fluffy softness, there is three dimensional structure and promote before absorbing large quantity of fluid with the absorbent cores being positioned at absorption and distribution layer opposite side body fluid to be dispensed to most of absorption and distribution layer surface near internal layer (it is again near the skin of user).Otherwise liquid can flood absorbing material at relatively narrow absorption point, rather than at the vast regional diffusion on absorbent cores surface better to absorb.Absorption and distribution layer can be made by various method, for example chemical adhesion and heat bonding, and this is all well known in the prior art.

The patent of all patents, patent application and the mandate thereof of mentioning in the present patent application, the disclosed foreign patent of any correspondence are open and publication is incorporated herein by reference.But, hereby show that this is not to recognize that these file instructions of any combination by reference or discloses the present invention.Also hereby show, this is not to recognize that any commercially available material described herein or product instruction or discloses the present invention.

Although described and shown specific embodiment of the invention scheme, having it will be apparent for a person skilled in the art that and can make various changes and modifications and not depart from the spirit and scope of this meal.Therefore, claim is intended to cover all this change and the modification in the scope of the invention.

Claims

1. manufacture a method of inserting absorbent article, comprise the following steps:

A) provide continuous ground floor;

B) by triangle or trapezoidal staggered being fixed on ground floor of absorbent cores, separated absorbent cores;

C) mid portion that the flexible member of stretching is fixed on to gap on ground floor is to form Hookean region, and each flexible member stretching has the longitudinal direction of the machine direction of being basically perpendicular to;

D) second layer is laminated on ground floor, absorbent cores and flexible member so that laminate to be provided;

2. the process of claim 1 wherein that flexible member is elastic foam, elastica, elastica or its combination.

3. the process of claim 1 wherein that the stretch ratio of the flexible member that stretches is 1.5-4.0, preferably 1.75-2.5.

4. the process of claim 1 wherein that flexible member is at step c) in be fixed on ground floor before from the cut sheet that becomes of continuous elastic omentum.

5. a continuous laminate, comprising:

Ground floor and the second layer,

The gap of separating discontinuous absorbent cores,

6. the laminate of claim 5, wherein said laminate also comprises any or multiple following element: fixed system, the absorption and distribution layer between absorbent cores and the second layer.