JP4420864B2 - Method for manufacturing individual package of absorbent article - Google Patents

Description

  The present invention comprises an absorbent article, a release sheet that is releasably bonded to the non-skin contact surface side of the absorbent article via an adhesive, and a packaging material for packaging the absorbent article. The present invention relates to a method for manufacturing an individual package of a functional article.

Conventionally, an absorbent article such as a panty liner (corimono sheet), a sanitary napkin, an incontinence pad or the like is folded together with a packaging material, and is individually packaged by sealing a predetermined portion of the packaging material. It is commercially available.
As such an individual package, a non-slipping adhesive is provided on the non-skin contact surface of the absorbent article to fix it to shorts, etc., and a release sheet covering the adhesive is fixed to the packaging material. What is being known.
As a manufacturing method of the individual package having such a configuration, for example, a strip-shaped release sheet in which a strip-shaped top sheet and a strip-shaped nonwoven fabric (corresponding to an absorbent body) are coated with a pressure-sensitive adhesive on a strip-shaped back sheet. After laminating layers, a method of obtaining an absorbent article with a release paper by punching it integrally with a release paper so as to form an individual absorbent article is known (see Patent Document 1).
However, even if the absorbent article obtained by this method is overlapped with the packaging material and folded as an individual package, the absorbent article and the release sheet are punched integrally and have the same shape, so that the absorbent product is absorbed from the individual package. When taking out the article, there is a problem that it is difficult to peel off the absorbent article and the release sheet.

Moreover, in the manufacturing method of the individual package as described above, instead of laminating a strip-shaped release sheet coated with an adhesive, such a release sheet is cut to a size that fits within the outline of the absorbent article. A method is also known in which a product is disposed on an absorbent article continuum, and then the absorbent article continuum is punched around a release sheet so as to be in the shape of individual absorbent articles (Patent Literature). 2).
However, the individual package obtained by this method has a small release sheet, and the range where the adhesive can be applied is limited to a narrow range, so that the anti-displacement performance is not good, and the release applied with the adhesive Since an apparatus for cutting and intermittently arranging sheets is necessary, there is a problem that the manufacturing apparatus becomes complicated.

JP 2003-339761 A Japanese Utility Model Publication No. 6-5613

  Accordingly, an object of the present invention is to provide an individual package that can easily peel the absorbent article from the release sheet when the absorbent article is taken out from the individual package, and has good anti-displacement performance of the absorbent article. Another object of the present invention is to provide a method for manufacturing an individual package of absorbent articles that can be efficiently manufactured with a simple apparatus.

  The present invention includes an absorbent article, a release sheet that is releasably bonded to the non-skin contact surface side of the absorbent article via an adhesive, and a packaging material for packaging the absorbent article. A method for manufacturing an individual package of absorbent articles, wherein a strip-shaped release sheet is continuously laminated on a strip-shaped raw material sheet on which at least one layer of the absorbent article is formed, with an adhesive interposed between the sheets. A laminating step, a cutting step of cutting out a laminated body having the same shape as the outer shape of the absorbent article from a belt-like laminated sheet in which the raw material sheet and the release sheet are laminated, and laminating the cut-out laminated body with a continuous sheet of packaging material And a separation step of sealing a predetermined portion of the continuous sheet of the packaging material and cutting into individual individual packages, and in the laminating step, the strip-shaped release sheet is At least that A method for producing an individual package of absorbent articles that is laminated so that the position of the side edge is positioned slightly inside the longitudinal end position of the portion of the raw material sheet that forms the absorbent article The above-mentioned purpose is achieved.

  The present invention also includes an absorbent article, a release sheet that is detachably bonded to the non-skin contact surface side of the absorbent article via an adhesive, and a packaging material for packaging the absorbent article. An absorbent article comprising an absorbent article, the absorbent article having a knob extending outwardly from an edge of the release sheet at at least one end of both longitudinal ends of the absorbent article. In the portions other than the knob, the absorbent article is individually packaged so that the outline of the absorbent article matches the outline of the release sheet.

According to the method for manufacturing an individual package of absorbent articles of the present invention, when the absorbent article is taken out from the individual package, the absorbent article can be easily peeled from the release sheet, and the absorbent article is displaced. An individual package with good stopping performance can be efficiently manufactured with a simple device.
The individual package of the absorbent article of the present invention can easily peel the absorbent article from the release sheet when taking out the absorbent article, and the absorbent article has a good anti-slip performance, Since the position of the side edge of the absorbent article and the position of the side edge of the release sheet coincide with each other, the rigidity at both ends in the width direction is enhanced. Since it is integrated with the release sheet until just before use of the liner, it can contribute to prevention of deformation when being carried.

Hereinafter, the present invention will be described based on a preferred embodiment thereof with reference to the drawings.
As shown in FIG. 1 and FIG. 2, an individual package 10, which is an embodiment of an individual package of an absorbent article according to the present invention, includes a panty liner 1 and a non-skin cover of the panty liner 1. A release sheet 3 that is releasably bonded via a pressure-sensitive adhesive 2 to a contact surface side (side opposite to the wearer's skin side when worn), and a packaging material 4 for packaging the panty liner 1 It comprises.

  As shown in FIG. 2, the panty liner 1 has an oval shape in which the vicinity of the central portion in the longitudinal direction is slightly narrowed when the individual package is deployed. The size of the length L in the longitudinal direction and the length W in the width direction (the length of the maximum width portion) of the panty liner 1 is not particularly limited, but for example, L is about 8 to 17 cm, and W is It is about 3-8 cm.

The panty liner 1 is capable of absorbing liquid from the skin contact surface side (side disposed on the wearer's skin side when worn) and holding the liquid so as not to leak. As shown in FIG. 2, the panty liner 1 has an oval shape in which the vicinity of the central portion in the longitudinal direction is slightly narrowed when the individual package is deployed.
Although not shown, the panty liner 1 includes a liquid holding layer located on the skin contact surface side and a leakproof layer located on the non-skin contact surface side, and the liquid holding layer and the leakproof layer are laminated to each other. In this state, the peripheral edge portions are integrated by a known joining process such as heat embossing to form the peripheral seal portion 13.

The release sheet 3 has a shape that is long in the same direction as the longitudinal direction of the panty liner 1 in the unfolded state of the individual package 10, and both end edges 3 a and 3 b in the longitudinal direction are in the width direction of the panty liner 1. It is a parallel straight line. Both ends 1 a, 1 b in the longitudinal direction of the panty liner 1 are located more outward in the longitudinal direction than the both ends 3 a, 3 b of the release sheet 3. That is, the panty liner 1 has extended portions extending outward from the both end edges 3a and 3b of the release sheet 3 at both ends in the longitudinal direction, and these extended portions are the present invention. The knobs 11 and 12 in FIG. In addition, since the knob | pick parts 11 and 12 can be utilized as a knob | pick part when peeling an absorbent article from a peeling sheet, it is called a knob | pick part.
The knobs 11 and 12 in the present invention are provided. The non-skin contact surface side of the knobs 11 and 12 is directly opposed to the packaging material 4 without any other sheet material interposed therebetween, and between each knob and the packaging material 4 is adhered or adhered. Not.
The release sheet 3 has the same outer shape as the panty liner 1 except that there is no portion facing each of the knobs 11 and 12, and in the part other than the knob, the outline of the panty liner 1 and the outline of the release sheet 3 Match.

  The knobs 11 and 12 each have a length in the same direction as the longitudinal direction of the panty liner 1, preferably 1 to 15 mm, and more preferably 3 to 10 mm. Further, the length of the release sheet 3 in the same direction as the longitudinal direction of the panty liner 1 is preferably 75 to 99%, more preferably 90 to 98% of the entire length of the panty liner 1 in the longitudinal direction.

  The adhesive 2 is for fixing the panty liner 1 to an underwear such as shorts when the panty liner 1 is used. In the present embodiment, as shown in FIG. It is applied in a predetermined pattern over substantially the entire area excluding the knobs 11 and 12 on the surface side. For the individual package, in the case where the adhesive is applied to the panty liner (absorbent article), the adhesive applied to the release sheet 3 by the adhesive application machine is applied to the panty liner 1 ( The case of transferring to an absorbent article) is also included. As the coating pattern of the pressure-sensitive adhesive 2, various conventionally known patterns can be adopted. However, the pressure-sensitive adhesive coating pattern in the present embodiment is continuously or discontinuously adhered along the width direction of the panty liner 1. The adhesive application part formed by applying the agent is an application pattern formed in multiple rows at predetermined intervals in the longitudinal direction of the panty liner 1.

  The coating range L (see FIG. 2) of the pressure-sensitive adhesive 2 in the longitudinal direction of the panty liner 1 is 60 to 95 with respect to the entire length in the longitudinal direction of the panty liner 1 from the viewpoint of obtaining good slip prevention performance for the panty liner 1. % Is preferable, and 70 to 85% is more preferable. From the same point of view, the coating range of the adhesive 2 in the width direction of the panty liner 1 is the full width W of the minimum width portion of the panty liner 1 in the vicinity of the central portion in the longitudinal direction of the panty liner 1 (exhaust portion facing portion) (FIG. 50 to 96% is preferable and 65 to 90% is more preferable.

  As shown in FIGS. 1 and 2, the packaging material 4 is formed in a vertically long shape in the unfolded state of the individual package. Specifically, the packaging material 4 is a rectangle having a long side in the same direction as the longitudinal direction of the panty liner 1. Is. A tab tape 6 is joined and fixed to an opening start end 4 a which is one end in the longitudinal direction of the packaging material 4. The unsealing start end 4 a is the one located on the outer surface of the individual package 10 out of the longitudinal ends of the packaging material 4.

The release sheet 3 and the packaging material 4 are joined via an adhesive 5. Various conventionally known patterns can be adopted as the coating pattern of the adhesive 5, but the coating pattern of the adhesive 5 in this embodiment is continuously along the longitudinal direction of the release sheet 3 or the packaging material 4. A strip-shaped adhesive application portion formed by applying an adhesive is an application pattern formed in a plurality of rows at predetermined intervals in the width direction of the release sheet 3 or the packaging material 4.
As shown in FIG. 2, the outermost position 5 a of the adhesive 5 rather than the outermost position 2 a of the pressure-sensitive adhesive 2 is present on the side of the opening 1 a on the opening start end 4 a side of the packaging material 4 in the longitudinal direction of the panty liner 1. When the panty liner 1 is peeled from the release sheet 3, it is preferable to be located on the outer side from the viewpoint of preventing the release sheet 3 from being picked and pulled together with the panty liner 1.

  In the individual package 10 of the present embodiment, the panty liner 1, the release sheet 3, and the packaging material 4 are integrally laminated in this order as shown in FIG. It is folded at the place, specifically, at the positions of B1 and B2 in FIG. A pair of seal portions 7, 7 are applied to each side edge of the packaging material 4 that extends outward from each side edge of the folded panty liner 1 and is integrated in the thickness direction. Is formed. The pair of seal portions 7 and 7 are formed at a pair of opposing edge portions of the individual package 10, and the packaging materials 4 laminated in two layers or three layers are joined to each other.

The material for forming the individual package 10 according to this embodiment will be described.
As the liquid holding layer 2 constituting the panty liner 1, a laminate of a liquid permeable top sheet and a liquid holding absorber can be used. As the surface sheet, non-woven fabrics, perforated films, laminates thereof and the like obtained by various production methods can be used. As the absorber, a fiber aggregate such as pulp fiber or a combination of this and a water-absorbing polymer can be used. Further, as the absorbent body, absorbent sheets such as absorbent paper, dry pulp sheets, stacked sheet-like pulp webs, absorbent polymer sheets (composed of nonwoven fabric, paper, superabsorbent polymer, etc.) can be used.

  Moreover, as the liquid holding layer 2 constituting the panty liner 1, a single-layer or multilayer nonwoven fabric including one or more layers containing latent crimpable fibers crimped three-dimensionally can be used.

  The latent crimpable fiber is a fiber that can be handled in the same manner as a conventional nonwoven fabric fiber before heating, and has a property that a helical crimp is developed and contracted by heating at a predetermined temperature. The latent crimpable fiber includes, for example, an eccentric core-sheath type composite fiber or a side-by-side type composite fiber containing two types of thermoplastic polymer materials having different shrinkage rates as components. Examples of the thermoplastic polymer material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides. The content of the latent crimpable fiber is preferably 40 to 100% by weight, more preferably 70 to 100% by weight, based on the weight of the liquid holding layer 2.

  As an example of the multilayer nonwoven fabric containing the latent crimpable fiber which is three-dimensionally crimped, a first fiber layer containing the latent crimpable fiber and a latent crimpable fiber which does not contain the latent crimpable fiber And a second fiber layer containing a lower content than the first fiber layer, and the first fiber layer and the second fiber layer are partially joined at a number of joints dispersedly arranged in the plane direction. One that is integrated can be mentioned. This non-woven fabric is, for example, in a state in which the first fiber layer forming material and the second fiber layer forming material are laminated to each other, and heat-sealing or ultrasonic embossing or the like to partially heat-seal both. Is produced in a dispersed state, and then the intermediate is subjected to a heat treatment to thermally shrink the first fiber layer forming material.

  As the leak-proof layer constituting the panty liner 1, various sheet materials conventionally used as a back sheet for absorbent articles such as panty liners and sanitary napkins can be preferably used. For example, a polyethylene film, a polypropylene film, a polyester film, etc. can be used. A highly water-resistant sheet such as an SMS nonwoven fabric can also be used.

  As the release sheet 3, a substrate sheet made of paper, a resin film, or the like that has been subjected to release treatment on one or both sides thereof can be used. Examples of the peeling treatment include a method in which a silicone resin-based material is applied and subjected to heat drying or ultraviolet treatment, a spraying method or a method of forming a thin film with various coaters.

  As the packaging material 4, various sheet materials conventionally used as packaging materials in individual packages of absorbent articles such as panty liners and sanitary napkins can be preferably used. For example, a resin film made of a resin such as polypropylene, low-density polyethylene, polyvinyl alcohol, or the like, or a nonwoven fabric or paper produced by various manufacturing methods, a composite material thereof, or the like can be used. In particular, an olefin resin such as polypropylene, a spunbond nonwoven fabric of polyester, or a composite nonwoven fabric such as SMS is preferable from the viewpoint of easy adhesion (joining) to the release sheet and smoothness.

  As the pressure-sensitive adhesive 2, various pressure-sensitive adhesives used for forming a pressure-sensitive adhesive part such as a pressure-sensitive adhesive part for preventing slippage of an absorbent article such as a panty liner or sanitary napkin can be used without particular limitation. Examples thereof include styrene-butadiene copolymers and styrene-isoprene copolymers. As the adhesive 5, various adhesives conventionally used for joining sheets between absorbent articles such as panty liners and sanitary napkins can be used without particular limitation.

Next, the manufacturing method of the individual package of the absorbent article of the present invention will be described with reference to FIG. 3 and FIG.
In the manufacturing method of the present embodiment, first, on the strip-shaped raw material sheet 1A for forming the liquid retaining layer and the leak-proof layer of the panty liner 1, the strip-shaped release sheet 30 coated with the adhesive 2 on one side, The surface coated with the pressure-sensitive adhesive 2 is continuously supplied and laminated with the surface facing the raw material sheet 1A side. When the release sheet 30 is laminated , the positions of both side edges 30a and 30b in the flow direction of the release sheet 30 are respectively the end positions 1a ′ and 1b in the longitudinal direction of the portion forming the panty liner 1 in the raw material sheet 1A. Laminate so that it is slightly inside.
In this embodiment, the adhesive 2 is intermittently applied in the flow direction of the release sheet 30 using an adhesive application machine 20 as shown in FIG. As shown in FIG. 4, the peripheral seal portion 13 described above is formed on the raw material sheet 1 </ b> A before lamination by a known seal device 13 </ b> A having a pair of seal rolls.

  Next, as shown in FIG. 3, a laminated body 8 having the same shape as the outer shape of the panty liner 1 is cut out from the belt-like laminated sheet 80 in which the raw material sheet 1 </ b> A and the release sheet 30 are laminated. As a cutting device used for this cutting, in addition to a rotary die cutter 81 composed of a cut roll and an anvil roll, as shown in FIG. Can be used. As shown in FIG. 4, the laminated body 8 in the present embodiment is laminated with the panty liner 1 and the release sheet 3 made of a part of the strip-like release sheet 30 with the adhesive 2 sandwiched therebetween. It has a structure.

  Next, as shown in FIG. 3 and FIG. 4, the laminate 8 is overlapped with a belt-like continuous sheet of the packaging material 4 and joined via an adhesive 5. In the present embodiment, the adhesive 5 is intermittently applied in the flow direction of the continuous sheet 40 of the packaging material using an adhesive application machine 50 as shown in FIG. Was laminated on the laminate 8.

  And the laminated body obtained in this way, that is, the laminated body of the panty liner 1, the release sheet 3 and the continuous sheet 40 of the packaging material is folded at two places indicated by B 1 and B 2 in FIG. 2. First, fold it together. Then, according to a conventional method, the folded laminate is sealed at a predetermined position of the continuous sheet 40 of the packaging material, cut into individual individual packages 10, and fixed with a tab tape. The body 10 is obtained. The sealing of a predetermined portion of the continuous sheet 40 of the packaging material and the cutting for separating the individual packaging 10 may be performed simultaneously or may be performed after sealing.

In the individual body 10 of the panty liner of the present embodiment, when the individual body 10 is opened by peeling off one end portion of the tab tape 6 and the seal portion 7 , the knob 11 (12) of the panty liner 1 can be easily picked. The panty liner 1 can be easily peeled from the release sheet 3 by picking and pulling the knob. In particular, when the knob portion 11 is formed at the end of the opening start end 4a in the longitudinal direction of the panty liner 1, the knob portion 11 is picked and pulled at a relatively early stage when the individual package 10 is opened. Therefore, it is easier to take out the panty liner 1.

  Further, the outline of the release sheet 3 is the same as the outline of the panty liner 1 in the portion other than the knob portion of the panty liner 1, and the coating range of the adhesive 4 can be made relatively wide. The panty liner 1 having good stopping performance can be obtained.

  In addition, since release sheets are laminated over the entire width of the panty liner 1 and the rigidity of both ends in the width direction of the panty liner 1 in the state of the individual package 10 is increased, the individual package is sold for sale in the manufacturing process. Stabilization when stacking individual packages to put dozens in a packaging bag is achieved, and for the user it is integrated with the release sheet until just before use, contributing to prevention of deformation when carrying can do.

  Moreover, since the length of the release sheet 30 is shorter than the length in the longitudinal direction of the panty liner 1 due to the formation of the knobs 12 and 11, the amount of material used can be reduced. Furthermore, it is not necessary to cut the release sheet coated with the adhesive in a small size or intermittently arrange the cut release sheet during the production, so that it can be efficiently manufactured with a relatively simple device. Can do.

  According to the manufacturing method of the individual package 10 of the present embodiment, a release sheet obtained by applying an adhesive to an individual package such as the individual package 10 that is easily peeled off from the release sheet and has good slip prevention performance. Can be efficiently manufactured with a simple apparatus without cutting the sheet into small pieces or disposing the cut release sheets intermittently.

As mentioned above, although embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, in the embodiment described above, the knobs are formed at both ends of the panty liner 1, but the knobs may be formed only at one end in the longitudinal direction of the panty liner 1.
In addition, as a strip-shaped raw material sheet for forming at least one layer of the absorbent article, a strip-shaped raw material sheet (for example, a strip-shaped sheet composed only of a resin film) that forms only the leak-proof layer of the panty liner 1 is used. After laminating, a belt-like sheet for forming a liquid holding layer may be laminated on the laminated body, and the laminated body may be integrally punched into the same shape as the outer shape of the panty liner 1.
Moreover, the release sheet 3 and the packaging material 4 may be joined by heat sealing or ultrasonic sealing.
In addition, the non-skin contact surface side of the back sheet is covered with both sides of the top sheet, and the release sheet is bonded to the non-skin contact surface formed by both sides of the top sheet via an adhesive It can also be.

Further, the absorbent article according to the present invention may be a sanitary napkin, an incontinence pad, or the like in addition to the above-described panty liner (orimono sheet).
In the production method of the present invention, the adhesive 2 interposed between the raw material sheet and the strip-shaped release sheet may be applied in advance to the strip-shaped release sheet as in the above-described embodiment. Instead, it may be applied to the raw material sheet side in advance, or the adhesive may be supplied to the junction of the raw material sheet and the release sheet.

It is a perspective view which shows the individual packaging of the absorbent article which concerns on one Embodiment of this invention. It is a figure which shows the state which expand | deployed the individual package of FIG. 1, (a) is a partially broken top view seen from the absorbent article (panty liner) side, (b) is XX of (a). It is a longitudinal section showing a line section typically. It is a perspective view for demonstrating the manufacturing procedure of the individual package of FIG. It is a schematic cross section for demonstrating the manufacturing procedure of the individual package of FIG.

Explanation of symbols

1 Panty liner (absorbent article)
2 Adhesive 3 Release sheet 4 Packaging material 5 Adhesive 10 Individual package 1A Raw material sheet 30 Strip-like release sheet 80 Laminated sheet 8 Laminated body 40 Continuous sheet of packaging material

Claims (4)

An absorbent article comprising: an absorbent article; a release sheet that is releasably bonded to the non-skin contact surface side of the absorbent article via an adhesive; and a packaging material for packaging the absorbent article. A method of manufacturing an individual package,
A laminating step of continuously laminating a strip-shaped release sheet on the raw material sheet with an adhesive interposed between the two sheets while conveying the strip-shaped raw material sheet for forming at least one layer of the absorbent article in the longitudinal direction A cutting step of cutting out a laminated body having the same shape as the outer shape of the absorbent article from a strip-shaped laminated sheet in which the raw material sheet and the release sheet are laminated, and a packaging material for the cut-out laminated body through an adhesive and bonding the continuous sheet, step folded folding the laminate together in a state of overlapping the continuous sheet of the packaging material, and seals the predetermined portions of the continuous sheet of wrapping material is cut into individual KoSokarada A separation step,
In the laminating step, the position of at least one side edge of the strip-shaped release sheet is located slightly inside the longitudinal end position of the portion forming the individual absorbent article in the raw material sheet. The manufacturing method of the individual package of the absorbent article laminated | stacked so that this peeling sheet may be distribute | arranged ranging over several of the part which forms the absorbent article in this raw material sheet.   The absorptivity according to claim 1, wherein the one side edge of the strip-shaped release sheet is a side edge on a side edge side of a continuous sheet of the packaging material that becomes an opening start end when it is an individual package. A method for manufacturing an individual package of articles.   The said absorbent article comprises a liquid holding layer and a leak-proof layer, The said strip | belt-shaped raw material sheet has a structure where this liquid holding layer and this leak-proof layer were laminated | stacked. Manufacturing method of individual package of absorbent article. An absorbent article comprising: an absorbent article; a release sheet that is releasably bonded to the non-skin contact surface side of the absorbent article via an adhesive; and a packaging material for packaging the absorbent article. An individual body,
The absorbent article has a knob portion extending outward from an edge of the release sheet at at least one end portion of both end portions in the longitudinal direction, and in the portions other than the knob portion, the absorption the contour of the release sheet contour of sex articles are coincident,
The release sheet and the packaging material are joined via an adhesive,
The individual packaging of an absorbent article , wherein the outermost position of the adhesive is on the outer side than the outermost position of the pressure-sensitive adhesive on at least one end side having the knob in the longitudinal direction of the absorbent article.

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