JP2021153917A - Packaging material, package planar article, packaged absorbent article and packaging method - Google Patents

Abstract

To provide a packaging material capable of executing sealing of both edge parts with a material similar to a resin, even being formed of a material other than the resin, and suppressing opening on the edge parts.SOLUTION: There is provided a packaging material 2 for packaging a planar article 1 in a state of folding the planar article into three and inward. The packaging material 2 is configured so that one end side in a prescribed direction L extends longer relative to a position where the planar article 1 is fixed. The packaging material 2 is configured so that, in the packaged state, a folded surface folded downward with respect to a surface folded into three and inward extends, and is folded into a Z-shape so as to be folded back twice to an upper side. In the packaged state, in a prescribed direction of an uppermost layer, an end 26 of the surface folded into three and inward and an end 27 of the surface folded into a Z shape contact without overlapping each other, and both edge parts 28, 29 in a width direction orthogonal to the prescribed direction of the packaging material are side-sealed by crimp.SELECTED DRAWING: Figure 4

Description

The present invention relates to a packaging material, a packaging surface article, a packaging absorbent article, and an individual packaging method thereof.

Planar articles such as absorbent articles such as sanitary napkins, panty liners, and incontinence pads are offered on the market in a state of being wrapped by a packaging sheet, and the packaging sheet may be formed of a resin such as plastic. It is common.

Both ends of the packaging sheet that wraps the absorbent article in the width direction are sealed by, for example, pressing with upper and lower rollers to form irregularities. When the packaging sheet is made of resin, the resin is melted by applying heat during crimping, and the inner side surfaces are partially welded to each other, so that they can be easily adhered to each other.

In recent years, in consideration of the influence on the environment, it has been proposed to use paper or non-woven fabric as a packaging material for these absorbent articles instead of resin (for example, Patent Documents 1 and 2).

Here, generally, when packaging an absorbent article, as shown in FIGS. 1 and 2, a planar article 7 is placed on the packaging sheet 8, and a region including one end and the other end of the packaging sheet 8 are placed. In many cases, the surface-like article is wrapped by folding it in three so that the area including the above overlaps with the area including the above, and is fastened with the fastening tape 9. In the inner tri-fold configuration, as shown in FIG. 2, there are a portion where two packaging sheets 8 are overlapped and a portion where three packaging sheets 8 are overlapped.

However, when the packaging material is paper, the general tri-fold packaging sheet 8 folding method of FIG. 2 is applied and pressure is applied to both ends in the width direction due to the side seals 81, 82 as well as the resin. When this is applied, a gap is generated between the upper and lower rollers and the wrapping paper in the portion where the number of overlapping sheets is two and the thickness is thin. Here, when the packaging material is made of paper, the paper does not melt even if heat is applied during crimping of the side seals, and the materials do not weld together. It is necessary to apply pressure to the paper, but if there is a gap, the crimping will be weakened by that amount and there is a possibility that the mouth will open without being sealed.

Therefore, Patent Document 2 proposes to seal the edge portion with an adhesive in order to eliminate the adhesion of the edge portion that is weakened by using paper as the packaging material.

JP-A-2002-53170 Japanese Unexamined Patent Publication No. 2003-93437

However, as in Patent Document 2, in order to seal the edge portion with an adhesive, it is necessary to provide equipment for adhesion in addition to the equipment for manufacturing the conventional packaging sheet, which requires a large amount of capital investment. Cost was required.

Therefore, in one aspect of the present invention, even if it is formed of a material other than resin, both edges can be sealed with the same equipment as resin, and opening of the mouth at both edges can be suppressed. The purpose is to provide materials.

The first aspect of the present invention is a packaging material for wrapping a planar article by folding it in three, and the packaging material has one end side in a predetermined direction from a position where the planar article is fixed. The packaging material is stretched for a long time, and in the packaged state, the folded surface to be folded downward is stretched with respect to the surface folded in three, and the packaging material is Z-folded so as to fold back twice upward. In the packaged state, the end of the inner tri-fold surface and the end of the Z-fold surface come into contact with each other in a predetermined direction of the uppermost layer without overlapping, and are orthogonal to the predetermined direction of the packaging material. Both edges in the width direction are side-sealed by crimping. Here, the Z-fold is a folding method of folding back twice upward without sandwiching the absorbent article.

According to the first embodiment, by extending one end side of the packaging material in a predetermined direction and providing a Z fold in addition to the inner tri-fold, it is possible to fold the packaging material so that the number of overlapping sheets is the same. The thickness of the overlap becomes even. That is, since there is no thin portion, even if the packaging material is formed of a material other than resin, both edges can be sealed with the same equipment as the resin, and opening of the mouth at both edges can be suppressed. .. Further, since the stretched portion for Z-folding is long, when wrapping an absorbent article (for example, a night napkin) larger than the tri-fold absorbent article (for example, a daytime napkin) of the present invention after use. By using the Z-folded portion to be stretched, the user can dispose of a large absorbent article after use without getting his hands dirty.

In the second aspect of the present invention, in the packaging material, the length of the planar article in the predetermined direction is shorter than the total of the regions constituting the inner tri-fold, and the planar article has the inner tri-fold. It is fixed so that it does not protrude from the constituent area.

According to the second form, the planar article is fixed so as not to protrude from the inner tri-fold area. Therefore, even if the adhesive tape is unintentionally peeled off, the absorbent article is not exposed and can be kept hygienic.

In the third embodiment of the present invention, the packaging material has a first region, a second region, a third region, a fourth region, and a fifth region as boundaries from the front side in the front-rear direction. The second region is the lowest layer and serves as the central surface of the inner tri-fold, and the third region is folded inward at the rear end in the front-rear direction of the second region to form a tri-fold fold surface. At the same time, the back surface of the Z-fold is formed, the fourth region is folded outward at the front end of the third region and overlaps with the third region to be the inner surface of the Z-fold, and the fifth region is after the fourth region. It becomes a Z-fold surface that is folded outward at the end and partially overlaps the fourth region, and the first region becomes a tri-fold surface that is folded inward from the front end of the second region, which is the lowest layer. In the upper layer, the front end free end of the fifth region and the rear end free end of the first region facing each other come into contact without overlapping.

According to the third embodiment, by extending the rear end side of the packaging material and providing a Z fold in addition to the inner tri-fold, it is possible to fold the packaging material so that the number of overlapping sheets is four. The thickness of the overlap becomes even. That is, since there is no thin portion, even if the packaging material is formed of a material other than resin, both edges can be sealed with the same equipment as the resin, and opening of the mouth at both edges can be suppressed. ..

In the fourth aspect of the present invention, in the front-rear direction, the third region is shorter than the length of the second region by the thickness of the planar article, and the fourth region is , The length is substantially equal to the third region.

According to the fourth aspect, the folding region is shorter than the length of the lowermost surface region by the thickness of the planar article, so that the folding region can be folded without being displaced from the crease.

In the fifth aspect of the present invention, the packaging material is paper.

According to the fifth form above, since the wrapping material is paper, unlike a resin wrapping sheet, even if it is discarded, it becomes a marine plastic that floats in the ocean or remains on the soil all the time. It can be made into an environmentally friendly material that will eventually decompose.

The sixth aspect of the present invention is a packaged surface-like article comprising any of the packaging materials of any of the first to fifth forms and the planar article packaged by the packaging material.

According to the sixth aspect, it is possible to provide a packaged surface-like article having the same effect as any one of the first to fifth forms.

In the seventh aspect of the present invention, the packaging surface-like article includes a release sheet whose back surface is fixed to the inner side surface of the packaging material, and the surface-like article has an adhesive portion on the back surface. The surface of the sheet is detachably adhered to the adhesive portion of the planar article.

According to the seventh aspect, when the package absorbent article is opened, the absorbent article can be developed following the packaging material as the packaging material is developed.

In the eighth aspect of the present invention, the packaging surface-like article is attached from above in the uppermost layer so as to connect the free end of the Z-fold surface and the free end of the inner tri-fold facing each other. The fastening tape is provided with a fastening tape, and the folding tape has a strong sealing portion on one side of the folding and a weak sealing portion that can be refastened and peeled off on one side of the folded back during use.

According to the eighth aspect, by attaching the fastening tape, the uppermost end portion can be connected while being positioned. Further, after opening and unfolding the packaging material, the weak seal portion is peeled off, but the seal of the strong seal portion is not peeled off and is maintained. As a result, the fastening tape can be reused as a pressing member when the absorbent article 1 after use is packaged.

In the ninth aspect of the present invention, the planar article of any of the sixth to eighth forms is an absorbent article, and the absorbent article has a liquid-permeable surface sheet and a liquid-impermeable surface sheet. It is a packaging absorbent article that includes a back surface sheet and an absorber provided between the front surface sheet and the back surface sheet, and has an elongated shape that is long in the front-rear direction.

According to the ninth aspect, it is possible to provide a packaging absorbent article having the same effect as any of the sixth to eighth forms.

A tenth aspect of the present invention is an individual packaging method for packaging a planar article using a packaging material, wherein the packaging material has a first region, a second region, and a third region from the front side in the front-rear direction. A step of folding the boundary between the fourth region and the fifth region of the packaging material inward to form a valley fold, which has the fourth region and the fifth region as boundaries. The step of folding the boundary between the fourth region and the third region of the packaging material outward to make a mountain fold, the step of developing the habitual packaging material, and the packaging of the planar article. Within the range of the first region, the second region, and the third region of the material, the fixing step of fixing to the inner side surface and the third region of the packaging material at the boundary with the second region. By folding inward together with the planar article, the fourth region is placed on the third region due to folding habits, and the fifth region is folded back on the fourth region to form the fifth region. The planar article so as to overlap the first region on the fourth region by the step of pressing the region at that position and folding the first region inward at the boundary with the second region. In the process of folding inward together, the front end free end of the fifth region whose position is pressed while pressing the first region from above and the rear end free end of the facing first region come into contact without overlapping. A tape pasting step of sticking a fastening tape from above so that the packaging material is connected in the same state, and an edge seal in which pressure is applied to both edges of the packaging material in the width direction orthogonal to the front-rear direction. It has a stopping step.

According to the tenth aspect, even if the packaging material is formed of a material other than resin, both edges can be sealed with the same equipment as the resin, and the opening of the mouth at both edges can be suppressed. Furthermore, when the fifth region is short, by preliminarily habituating the folds that do not sandwich the absorbent article, the opening force is less likely to work before use without adversely affecting the absorbent article. Can be done.

The eleventh embodiment of the present invention is an individual packaging method for packaging a planar article using a packaging material, wherein the packaging material is a first region, a second region, and a third region from the front side in the front-rear direction. , The fourth region and the fifth region are provided with the crease as a boundary, and the step of folding the boundary between the fourth region and the fifth region of the packaging material inward to form a valley fold. A step of folding the boundary between the fourth region and the third region of the packaging material outward to make a mountain fold, a step of developing the habitual packaging material, and the planar article. Within the range of the first region, the second region, and the third region of the packaging material, the fixing step of fixing to the inner side surface and the third region of the packaging material at the boundary with the second region. By folding inward together with the planar article, the fourth region is placed on the third region due to the folding habit, and the fifth region is partially placed on the fourth region. A step of folding the first region inward at a boundary with the second region, and a step of folding the first region inward together with the planar article so as to overlap the fourth region. While pressing the fifth region and the first region from above, the front end free end of the fifth region and the rear end free end of the first region facing each other are connected so as to be in contact with each other without overlapping. It also has a tape pasting step of sticking a fastening tape from above, and an edge sealing step of applying pressure to side seal both edges of the packaging material in the width direction orthogonal to the front-rear direction. ..

According to the eleventh embodiment, even if the packaging material is formed of a material other than resin, both edges can be sealed with the same equipment as the resin, and the opening of the mouth at both edges can be suppressed. .. Further, when the fifth region is long, by preliminarily habituating the folding that does not sandwich the absorbent article, the opening force is less likely to work before use without adversely affecting the absorbent article. Can be done.

According to one aspect, even if the packaging material is formed of a material other than resin, both edges can be sealed with the same equipment as the resin, and opening of the mouth at both edges can be suppressed.

An overall perspective view of a general packaging absorbent article according to a conventional example. FIG. 6 is a schematic cross-sectional view of a general packaging absorbent article according to a conventional example. The figure which developed the package absorbable article which concerns on one Embodiment of this invention. A schematic cross-sectional view showing a folded state of a packaging absorbent article. The whole perspective view of the package absorbent article which concerns on one Embodiment of this invention. The flowchart which shows the packaging method of the absorbent article by the packaging material of this invention. The figure explaining the sticking position to the packaging material of the absorbent article in S4 of FIG. The figure explaining the folding of the packaging material in S5 and S6 of FIG. The figure explaining the sticking of the sticking sticker in S7 of FIG. FIG. 6 is an explanatory view of crimping both ends in the width direction in S8 of FIG. Explanatory drawing of the picking position of the packaging material at the time of use and stretching.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, unless otherwise specified, the same or corresponding configurations may be designated by the same reference numerals and the description thereof may be omitted.

The packaging material according to this embodiment is a sheet for packaging and accommodating a planar article. The packaging material according to this embodiment can be suitably used as a non-resin packaging material for packaging absorbent articles such as sanitary napkins, panty liners, and incontinence pads as planar articles. Therefore, in the following, the packaging material for packaging the absorbent article and the packaging absorbent article will be mainly described.

<Overall configuration>
FIG. 3 is also a diagram showing a state in which the package absorbent article 100 according to the embodiment of the present invention is unfolded.

The packaging absorbent article 100 has an absorbent article 1, a packaging material 2, and a fastening tape 3. In the following example, the packaging material 2 has a rectangular elongated shape, and the longitudinal side is L in the front-rear direction and the short side is W in the width direction.

The absorbent article 1 includes a front surface sheet 11, a back surface sheet 12 (see FIG. 4), and an absorber 13. The front surface sheet 11 is a liquid-permeable sheet, and the back surface 12 sheet is a liquid-impermeable sheet. The absorber 13 is sandwiched between the two sheets 11 and 12 and is provided within the range indicated by the dotted line, and the front surface sheet 11 and the back surface sheet 12 are directly bonded to each other near the edge portion.

The surface sheet 11 is a liquid-permeable sheet that rapidly permeates body fluids such as menstrual blood, vaginal discharge, and urine. As the surface sheet 11, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. As the material fibers constituting the non-woven fabric, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton can be used alone or. Two or more types can be used in combination. It is also possible to use a composite fiber in which synthetic fibers having different melting points are combined.

As the back sheet 12 (see FIG. 4), a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. It is possible to use a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, or a laminated non-woven fabric sheet in which a waterproof film is interposed to ensure substantially impermeable liquid. Further, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such a water-impervious / moisture-permeable sheet material is obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in the uniaxial or biaxial direction. A porous sheet can be used.

The absorber 13 interposed between the front surface sheet 11 and the back surface sheet 12 is not limited as long as it is a material capable of absorbing and retaining body fluid, but preferably contains cotton-like pulp and a water-absorbent polymer. As the water-absorbent polymer, a superabsorbent polymer (SAP), a superabsorbent polymer fiber (SAF), or a combination thereof can be used. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. As a raw material for chemical pulp, softwood, softwood and the like are used, but softwood is preferably used because of its long fiber length and the like. Further, synthetic fibers may be mixed with the absorber 13.

Further, the absorbent article 1 may be provided with a pressing groove (also referred to as fit embossing) 14 that is recessed from the front surface sheet 11 side to the back surface sheet 12 side.

The thickness of the absorbent article 1 can be in the range of 1 to 10 mm, preferably in the range of 1 to 4 mm. This thickness does not have to be uniform over the entire surface of the absorbent article 1, and by changing the thickness of the absorber 13, the central portion of the absorbent article 1 in the front-rear direction L, the portion corresponding to the groove of the buttocks, and the like are bulged. It is also possible to make the structure.

In the form of FIG. 3, the absorbent article 1 has an elongated shape that is long in the front-rear direction L as a whole when viewed from above, but the shape of the absorbent article 1 is not limited to the elongated shape shown in the drawing, and the shape of the absorbent article 1 is not limited to the elongated shape shown in the drawing. The shape may be such that L and the width direction W orthogonal to the front-rear direction L have substantially the same length.

Further, in the illustrated form, the absorbent article 1 has a shape symmetrical with respect to both the center line along the longitudinal direction (L in the front-rear direction) and the center line along the width direction W. , The shape may be asymmetric with respect to either the front-rear direction L or the width direction W. In that case, the orientation in the longitudinal direction and the width direction when the absorbent article 1 is arranged on the packaging material 2 is not limited.

Alternatively, the absorbent article 1 may be provided with a blade member extending from a substantially central portion in the front-rear direction to the outside in the width direction.

With reference to FIG. 3, the packaging material 2 includes a first region 21, a second region 22, a third region 23, a fourth region 24, and a fifth region 25, which are separated by a folding line from the front side in the front-rear direction. Have.

The front end of the first region 21 in the front-rear direction in the unfolded state as shown in FIG. 3 is one end 26 of the free end, and the rear end of the fifth region 25 is the other end 27 of the free end.

Seen from the inside of the pasted state, the boundary between the first region 21 and the second region 22 is the valley fold line V3, the boundary between the second region 22 and the third region 23 is the valley fold line V2, and the third region 23. The boundary between the fourth region 24 and the fourth region 24 is the mountain fold line M, and the boundary between the fourth region 24 and the fifth region 25 is the valley fold line V1.

The packaging material 2 of the present invention extends longer on the rear end side than the position where the absorbent article 1 is fixed. In the packaging material 2, the rear end side from the position where the absorbent article 1 is fixed is the stretched portion E, and the front end side from the rear end of the fixed absorbent article 1 is the mounting portion P.

In the present invention, as the packaging material 2 which is an individual packaging material, for example, paper or a non-woven fabric which does not use resin can be used.

It is preferable to use paper for the packaging material 2 in that the environmental burden at the time of disposal is small and a unique texture, for example, the appearance and texture of a gentle impression of a natural material can be imparted. In addition, in this specification, the paper can refer to the thing which made into a flat plate shape by sticking a plant fiber or other fiber with a sticking agent. In particular, it can refer to those using plant fiber (pulp) as a main raw material, for example, those containing 50% or more of plant fiber, preferably 80% or more of the contained fibers. The type of pulp contained in the paper may include wood pulp, non-wood pulp, and used paper pulp, and these may be mechanical pulp or chemical pulp. Additives may be added to the paper.

Further, examples of the specific paper used for the packaging material 2 include various types of paper such as Western paper, Japanese paper, processed paper, and synthetic paper. In addition, papers conventionally used for other purposes, such as newspapers, printing papers (including high-quality papers), writing papers, drawing papers, wrapping papers, thin leaf papers, mixed papers, etc., are unprocessed or processed. Can also be used.

When paper is used as the material of the packaging material 2, the packaging material 2 is made of tissue paper having a low basis weight so that it can be easily folded when packaging the absorbent article and the state after packaging can be easily maintained. be able to. The thin paper may be thin imitation paper, Indian paper, rice paper, glassin paper, tissue paper, toilet paper, filter paper, or the like. Further, the packaging material 2 may be one or both sides processed after papermaking. Examples of the above-mentioned processing include crepe processing, embossing processing, calendar processing, water-repellent processing, slit processing, ply processing, printing processing and the like. By performing crepe processing or embossing processing, both strength and flexibility can be improved. Further, a bonding force reducing process (detailed later) for reducing the bonding force with the adhesive tape is also included in the processing.

When paper is used as the material of the packaging material 2, the basis weight of the packaging material 2 is preferably 50 g / m2 or less, more preferably 40 g / m2 or less, still more preferably 30 g / m2 or less, 20 g / m2 or less, 11 g / m2. Hereinafter, it can be 8 g / m2 or less. The lower limit of the basis weight of the packaging material 2 is not particularly limited as long as it can function as the packaging material 2, but it can be preferably 5 g / m2 or more, and more preferably 10 g / m2 or more. The thickness of the paper packaging material 2 can be preferably 40 to 200 μm, more preferably 100 to 200 μm.

When a non-woven fabric that does not use resin is used for the packaging material 2, the non-woven fabric can be composed of, for example, natural fibers such as cotton alone or in combination of two or more.

In the example of FIG. 3, the packaging material 2 shows an example of a rectangular elongated shape, but the shape of the packaging material 2 is not limited to the elongated shape, and the length of the packaging material 2 in the front-rear direction L and the front-rear direction L thereof. The shape may be substantially the same as the length of the width direction W orthogonal to. Further, the packaging material 2 has dimensions such that the length of the L in the front-rear direction is 10 to 30 cm, preferably 15 to 25 cm, and the length of the W in the width direction is 3 to 18 cm, preferably 10 to 14 cm. good.

The fastening tape (also referred to as a fastening sticker or pouch tape) 3 is attached to one end 26 of the packaging material 2. At the time of packaging, the fastening tape 3 connects one end 26 and the other end 27 of the packaging material 2.

The absorbent article 1 may be provided with a slip-preventing material on the back sheet 12 side thereof for fixing the absorbent article 1 to shorts or the like when the absorbent article 1 is attached. The slip prevention material may be a sticky layer containing a styrene polymer, a tackifier, a plasticizer, or the like, or a non-sticky layer containing rubber or the like.

When the back sheet 12 is provided with an adhesive anti-slip material, the absorbent article 1 is placed on the packaging material 2 so that the back sheet 12 side faces the packaging material 2 as shown in FIG. , The absorbent article 1 and the packaging material 2 can be adhered (separably adhered). As shown in the figure, in the form in which the packaging material 2 is folded together with the absorbent article 1 to wrap the absorbent article 1, if the absorbent article 1 and the packaging material 2 are adhered to each other, the package absorbent article 100 is opened. Occasionally, with the development of the packaging material 2, the absorbent article 1 can be developed following the packaging material 2.

When the absorbent article 1 and the packaging material 2 are adhered to each other, a mold release treatment can be applied to at least the region of the packaging material 2 corresponding to the slip prevention material of the absorbent article 1. As a result, after opening and spreading the packaging material 2, the absorbent article 1 can be easily peeled off from the packaging material 2 and taken out.

Further, a release sheet 4 (see FIG. 7) for covering and protecting at least the anti-slip material of the absorbent article 1 may be provided between the absorbent article 1 and the packaging material 2. The case where the release sheet 4 is provided will be described later together with FIG.

In the illustrated form, the absorbent article 1 is placed on the packaging material 2 so that the back surface sheet 12 side faces the packaging material 2, but the absorbent article 1 is placed on the packaging material 2 so that the front surface sheet 11 side faces the packaging material 2. It may be placed. In this case, since the back surface sheet 12 is exposed in the unfolded state, the back surface sheet 12 is covered with a release sheet that can be peeled off from the slip prevention material on the back surface side, and the front end or the rear end of the release sheet is covered with the packaging material 2. The absorbent article 1 is provided so as to be sandwiched between the release sheet having one end fixed and the packaging material 2 by being attached to the first region 21 or the third region 23 of the above.

<Folding configuration>
Here, FIG. 4 shows a schematic cross-sectional view showing a folded state of the packaging absorbent article 100. FIG. 5 shows an overall perspective view of the packaging absorbent article 100.

As shown in FIG. 4, in the packaging state, in order for the packaging material 2 to wrap the absorbent article 1, the absorbent article 1 is folded in three and the packaging material 2 is overlapped in most areas. It is folded.

Specifically, in the packaging state, the packaging material 2 has a third region 23 which is a folding surface (also referred to as a middle winding surface) which is folded downward with respect to a surface which is internally tri-folded (also referred to as a rolled tri-fold). , It is stretched from the general structure shown in FIG. 2 and folded into a Z-fold (also referred to as an outer tri-fold or a bellows fold) so as to be folded twice upward.

The portion of the mounting portion P of the packaging material 2 is folded inward together with the absorbent article 1, and the portion of the stretched portion E is folded back together with the absorbent article 1.

Then, in the packaged state, in the front-rear direction of the uppermost layer, the end portion (one end 26) of the first region 21 which is the surface of the inner tri-fold and the end portion (the other end) of the fifth region 25 which is the surface of the Z-fold. 27) are in contact with each other without overlapping.

Here, when they are in contact without overlapping, both ends do not overlap, but it is not necessary that the ends 26 and 27 are in complete contact with each other. The ends 26, 27 may be in a close state with a slight gap so as not to affect the crimping. In addition, if there is a slight gap between both ends (both edges) in the width direction where crimping is performed so that they are in contact with each other or have no effect, the crimping is affected to some extent on the center side in the width direction. There may be a gap between them.

Specifically, the second region 22 is the lowest layer and is the central surface (back surface) of the inner tri-fold.

The third region 23 is the rear end of the lowermost second region 22 in the front-rear direction and is folded inward to form the second layer from the bottom. The third region 23 serves as a tri-fold folding surface and a Z-fold back surface.

The fourth region 24 is folded outward at the front end of the third region 23 and overlaps the third region 23 to form the third layer from the bottom. The fourth region 24 is the inner surface of the Z-fold.

The fifth region 25 is a rear end of the fourth region 24, which is a portion folded outward and becomes a Z-folded surface. The other end 27 of the packaging material 2 becomes a free end on the front end side of the fifth region 25 when folded.

The first region 21 is a portion folded inward from the front end of the second region 22, which is the lowest layer, and is a tri-fold surface. When folded, one end 26 of the packaging material 2 becomes a free end on the rear end side of the first region 21.

The fifth region 25 and the first region 21 form the fourth layer from the bottom, that is, the uppermost layer. Then, in the packaging state as shown in FIG. 5, in the uppermost layer, the front end free end (the other end 27) of the fifth region 25, which is the surface of the Z-fold, and the first region 21, which is the surface of the inner tri-fold, face each other. The rear end free ends (one end 26) are connected by being stopped by the fastening tape 3 so that they come into contact with each other without overlapping.

Here, in the fastening tape 3, one end 26 side of the first region 21 of the packaging material 2 is the strong sealing portion 31, and the other end 27 side of the fifth region 25 is the weak sealing portion 32.

The strong seal portion 31 and the weak seal portion 32 can be formed by an adhesive or the like.

The strong seal portion 31 is a seal that cannot be peeled off by a normal opening operation, and the weak seal portion 32 is a seal that can be peeled off by a normal opening operation.

After opening and unfolding the packaging material 2, the weak seal portion 32 is peeled off, but the seal of the strong seal portion 31 is not peeled off and is maintained. As a result, the fastening tape 3 can be reused as a pressing member when the absorbent article 1 after use is wrapped with the packaging material 2.

Further, as shown in FIG. 5, after folding, both ends of the packaging material 2 temporarily fixed by the fastening tape 3 in the width direction are sealed by pressing to form the side seal portions 28 and 29. The side seal portions 28 and 29 are sealed by pressure bonding with upper and lower rollers to form irregularities. Details of the side seal portions 28 and 29 will be described later together with FIG.

Here, as shown in FIGS. 3 and 4, the length of the absorbent article 1 in the front-rear direction is shorter than the total of the first region 21, the second region 22, and the third region 23, and the absorbent article 1 is , The first region 21, the second region 22, and the third region 23 are fixed to the inner side surface, so that they fit in the inner tri-fold.

Then, as shown in FIG. 4, in the front-rear direction of the packaging material 2, the third region 23, which also serves as the folding surface of the inner tri-fold and the back surface of the Z-fold, is an absorbent article with respect to the length of the second region 22. It is shorter by the thickness T1 of 1. The fourth region 24, which is the inner surface of the Z-fold, has a length substantially equal to that of the third region 23, which is the back surface of the Z-fold.

That is, assuming that the length L of each region 21 to 25 of the packaging material 2 is L as shown in FIG. 3, L22> L23≈L24> L21 and L25.

As a result, the packaging material 2 can be folded (inside tri-folded) and folded back (Z-folded) without dub at the fold line portion, so that the thickness of the packaging material 2 in the packaged state can be made more uniform. Therefore, evenly applying pressure to both ends in the width direction over the entire area enables uniform sealing of the side seal portions 28 and 29.

Here, in the state of being packaged as shown in FIG. 5, the upper side of the second region 22 which is the lowermost surface and the fourth region 24 which is the third from the bottom is the inner side surface. On the other hand, the third region 23, which is the second from the bottom, and the first region 21 and the fifth region 25, which are the uppermost surfaces, have an outer surface on the upper side.

For example, when the release sheet 4 is not provided, the inner surface of the packaging material 2 may be a peel-treated surface that can be easily peeled off, but the first region 21 and the fifth region 25 on the uppermost surface are non-peeling-treated surfaces. Since a certain outer surface is on the upper side, it does not affect the adhesiveness of the fastening tape 3.

As shown in FIG. 4, in the packaging material 2, the Z-fold fold lines V1 and M that do not sandwich the absorbent article 1 are compared with the inner tri-fold fold lines V2 and V3 that are folded together with the absorbent article 1. The folding angle of is steep.

Here, in the packaged state, the fourth region 24 is located in the second layer from the top, and the fifth region 25 is located in the uppermost layer. Therefore, the folding lines V1 and M are weakly folded, and when pressure is generated in the opening direction, a force that causes the packaging material 2 to unfold is applied even in the state before use. If the fastening tape 3 is accidentally removed while the opening force is applied by the folding lines V1 and M, the opening force may act to open the package, which makes it difficult for the opening force to work. It is preferable that it is strongly folded.

However, if a strong force is applied to strengthen the folding of the fold line after fixing the absorbent article 1 to the packaging material 2, the absorbent article 1 also has a strong folding habit. If the absorbent article 1 has a strong crease, the liquid tends to accumulate in the place of the crease during use, and liquid leakage occurs due to excessive accumulation, or a space is created by adhesion with the skin and the liquid There is a risk of adverse effects such as the occurrence of tight leaks.

Therefore, it is preferable that the fold lines V1 and M in the stretched region E where the absorbent article 1 is not placed are creases in advance, that is, habituated before the absorbent article 1 is fixed. ..

The packaging procedure, including the habituation, will be described below.

<Packaging process>
Here, the packaging process of the present invention will be described with reference to FIGS. 6 to 10.
FIG. 6 is a flowchart showing a method of packaging the absorbent article 1 by the packaging material 2 of the present invention.

In step S1, the boundary between the fourth region 24 and the fifth region 25 of the packaging material 2 is folded inward to make the valley fold V1 habit.

In step S2, the boundary between the fourth region 24 and the third region 23 of the packaging material 2 is folded outward to make a mountain fold M habit. The order of steps S1 and S2 may be reversed. If the fold line V1 and the mountain fold line M, which are the Z folds that do not sandwich the absorbent article 1, are strongly folded in advance at S1 and S2 to make a habit, the absorbent article 1 will not be adversely affected by folding and before use. It is possible to make it difficult to work the opening force of.

In step S3, the crease-created (habitualized) packaging material 2 is unfolded.

In step S4, the absorbent article 1 is fixed to the inner surface within the range of the first region 21, the second region 22, and the third region 23 of the packaging material. FIG. 7 shows a diagram illustrating attachment of the absorbent article 1 to the packaging material 2 in S4.

The length of the absorbent article 1 in the front-rear direction shown in FIG. 7 is shorter than the total of the first region 21, the second region 22, and the third region 23, which are the inner tri-folded portions.

The absorbent article 1 is fixed to the inner surface of the first region 21, the second region 22, and the third region 23. The absorbent article 1 is arranged so as not to protrude from the first region 21, the second region 22, and the third region 23, which form the inner tri-fold.

With this configuration, after the fastening tape 3 is peeled off, first, the second fourth region 24 from the top is exposed, and the absorbent article 1 is not exposed. Therefore, for example, even if the adhesive tape 3 is unintentionally peeled off, for example, when the packaging absorbent article 100 is densely packed in the user's pouch, vibration is applied, and the absorbent article 1 is exposed. Because it does not, it can be kept hygienic.

Further, as shown in FIG. 7, a release sheet 4 may be provided between the absorbent article 1 and the packaging material 2. The back surface of the release sheet 4 is fixed to the inner side surface of the packaging material 2. The release sheet 4 and the packaging material 2 are adhered to each other so as not to be peeled off.

The absorbent article 1 has an adhesive portion (anti-slip material) on the back surface, and the surface of the release sheet is releasably adhered to the adhesive portion of the absorbent article 1.

In addition, although the example in which the release sheet is provided inside is provided in FIG. 7, the specification may be such that the release sheet is not removed and the release treatment agent is applied to the packaging material 2. When applying the release treatment agent, if the packaging material 2 is paper and it is not waterproof, the release treatment agent may strike through. In that case, apply the sealant to the packaging material 2 first. The specifications are to be applied.

In step S5, as shown in FIG. 8A, the third region 23 of the packaging material 2 is folded inward together with the absorbent article 1 at the boundary with the second region 22. At this time, when the fifth region 25 is short, when the third region 23 is folded, the fourth region 24 rides on the third region due to the folding habit in S2, and the fifth region 25 is the fourth region 24. It is in a state of extending outward (see FIG. 8B).

Then, in step S6, the fifth region 25 is folded back without the absorbent article 1 so as to be placed on the fourth region 24, and the force is continuously applied so as to maintain the position. The member that maintains the position of the fifth region 25 is, for example, a roller that presses the regions 25, 24, 23, and 22 from above.

When the fifth region 25 is short, the fifth region 25 is in an open state in S5 as shown in FIG. 8B, but when the fifth region 25 is long, it does not need to go through S6. , S5, the fifth region 25 rides on the fourth region 24. That is, when the fifth region 25 is long, when the third region 23 is folded, the fourth region 24 rides on the third region due to the Z-fold habit in S1 and S2, and the fifth region 25 is the third region. It is in a state of riding on a part of the four regions 24 (see FIG. 8C), and the folding portions of S5 and S6 can be realized in one folding step.

In step S7, the first region 21 is folded inward at the boundary with the second region 22, so that the first region is folded inward together with the absorbent article 1 so as to overlap the fourth region 24.

In step S8, as shown in FIG. 9, while pressing the first region 21 from above, the other end 27 which is the front end free end of the fifth region 25 which is continuously pressed from S6 and the other end 27 which faces each other after the first region 21. The fastening tape 3 is attached from above so that one end 26, which is an end free end, is connected in contact with each other without overlapping. By attaching the fastening tape 3, the uppermost end portions 26 and 27 can be connected while being positioned.

Here, for example, if the fastening tape 3 is attached to one end 26 which is the rear end free end of the first region 21, step S6 and step S7 are performed in a series of movements while folding the first region 21. Since the fastening tape 3 can be attached in the flow of the above, it is more preferable.

Then, in step S9, pressure is applied to both edges of the packaging material 2 in the width direction orthogonal to the front-rear direction to seal the side seals, that is, to seal the edges.

Both edge portions in the width direction orthogonal to the front-rear direction of the packaging material 2 are side-sealed by crimping to form side-seal portions 28 and 29. FIG. 10 shows an explanatory diagram of crimping of S9. As shown in FIG. 10, the outer peripheral surface is sealed by crimping to form irregularities by pressing with upper and lower rollers 51 and 55 having convex portions 52 and 56 extending in the axial direction.

In the present invention, by extending the rear end side of the packaging material and providing Z folds in addition to the inner tri-fold, it is possible to fold the packaging material so that the number of overlapping sheets is the same, whereby the thickness of the overlap is made uniform. Become. That is, since there is no thin portion, the embossing pressure can be evenly applied when pressure is applied from the rollers 51 and 55 to crimp (end seal) the side seal portions 28 and 29.

Further, conventionally, as shown in FIG. 2, two or three sheets are overlapped, but in the configuration of the present invention, except for a small part, there are substantially four overlapping sheets. Therefore, it becomes possible to use a thin material (for example, crepe paper) that is not thick enough for crimping by embossing. If it is a stretchable material such as crepe paper, even if there are many overlapping sheets, the paper will be deformed according to the embossing to make a seal.

As a result, it is possible to prevent the opening of the side seal portions 28 and 29 that occur in the thin portion. By this sealing, even if the packaging material for individual packaging is made of paper, the sealing property can be improved and the absorbent article 1 can be kept hygienic.

As described above, in the present invention, since the thickness of the packaging material can be made uniform, even if the packaging material is formed of a material other than resin, both edges can be sealed with the same equipment as the resin. It is possible to suppress the opening of the mouth at the edge.

Furthermore, by using water-soluble paper or biodegradable paper as the wrapping material, unlike resin wrapping sheets, even if it is discarded, it becomes marine plastic that floats in the ocean, or it stays on the soil all the time. It can be made into an environmentally friendly material that will eventually decompose without remaining.

Then, in S10, the packaging absorbent articles 100 are cut one by one. At this time, as shown in FIG. 10, both ends of each package absorbent article 100 in the width direction are side seal portions 28 and 29. In a state where the plurality of package absorbent articles 100 are connected, the center of the adjacent side seal portions 28, 29 in the width direction is cut in the front-rear direction, so that the accommodated absorbent article 1 is not cut. , The packaging absorbent article 100 can be separated one by one.

<Knob position when opening>
Here, FIG. 11 shows a picking position when the packaging material 2 is unfolded at the time of use, and an explanatory diagram of stretching.

As described above, the valley fold line V1 which is the folding back of the boundary between the fifth region 25, which is the uppermost layer, and the fourth region 24, which is the second layer from the top, is strongly habituated in advance and therefore stops at the time of use. Even if the weak seal portion 32 of the tape 3 is peeled off, the fifth region 25 may be directly above the fourth region 24.

Therefore, when the packaging material 2 is unfolded during use, as shown in FIG. 11A, it is possible to pinch the folded end, that is, the periphery of the fifth region 25 and the rear end side of the fourth region 24 together. can. Alternatively, the other end 27, which is the front end free end of the fifth region 25, may be pinched in the same manner as a general packaging sheet.

Then, by pulling it toward the rear end side while pinching, the packaging material 2 and the absorbent article 1 are developed as shown in FIG. 11 (b). Then, the absorbent article 1 is used by grasping the front end or the rear end of the absorbent article 1 and peeling the absorbent article 1 from the packaging material 2.

In the present invention, the rear end side of the packaging material 2 extends longer than the absorbent article 1, but the procedure of the user in the opening operation is almost the same. Therefore, there is almost no demerit in terms of the opening procedure at the time of use.

Further, since the stretched portion E for Z-folding of the packaging material 2 of the present invention is longer than the general packaging sheet shown in FIG. 1, it is firmly wrapped when the absorbent article 1 after use is discarded. be able to. For example, when wrapping an absorbent article (eg, a night napkin) that is larger than the tri-fold absorbent article (eg, a daytime napkin) of the present invention, it can be used by extending the Z-fold portion. One can dispose of large absorbent articles after use without getting his hands dirty.

Although the embodiment in which the planar article is an absorbent article has been described above, the planar article is not limited to the absorbent article. The packaging sheet according to this embodiment can also be used for packaging sanitary products such as masks.

1 Absorbent article (plane article)
2 Packaging material 3 Fastening tape (tape)
4 Peeling sheet 11 Front sheet 12 Back sheet 13 Absorber 14 Squeezing groove (fit embossing)
21 First area (inner tri-fold surface)
22 Second area (center surface (back surface) of inner tri-fold)
23 Third area (inner tri-fold folding surface, Z-fold back surface)
24 4th area (inner surface of Z-fold)
25 5th area (Z-fold surface)
26 One end (free end on the rear end side of the first region, the end of the surface of the inner tri-fold)
27 The other end (free end on the front end side of the fifth region, the end of the Z-fold surface)
28 Side seals (both edges in the width direction)
29 Side seals (both edges in the width direction)
31 Strong seal part 32 Weak seal part 100 Package absorbent article (Packaging surface article)
L Front-back direction (predetermined direction)
W width direction

Claims (11)

It is a packaging material for folding a planar article in three and wrapping it.
The packaging material is stretched longer on one end side in a predetermined direction than the position where the planar article is fixed, and the packaging material is folded inward on the inner tri-folded surface in the packaged state. The surface is stretched and Z-folded so that it folds back twice upward.
In the packaged state, the end of the inner tri-fold surface and the end of the Z-fold surface come into contact with each other in the predetermined direction of the uppermost layer without overlapping.
A packaging material in which both edges of the packaging material in the width direction orthogonal to the predetermined direction are side-sealed by crimping. The length of the planar article in the predetermined direction is shorter than the total of the regions constituting the inner tri-fold.
The packaging material according to claim 1, wherein the planar article is fixed so as not to protrude from the region constituting the inner tri-fold. The packaging material has a first region, a second region, a third region, a fourth region, and a fifth region from the front side in the front-rear direction with a crease as a boundary.
The second region is the lowest layer and serves as the central surface of the inner tri-fold.
When the third region is folded inward at the rear end in the front-rear direction of the second region, it becomes a tri-fold folding surface and a Z-fold back surface.
The fourth region folds outward at the front end of the third region and overlaps the third region to form an inner surface of the Z-fold.
The fifth region folds outward at the rear end of the fourth region to form a Z-fold surface that partially overlaps the fourth region.
The first region becomes a tri-fold surface folded inward from the front end of the second region, which is the lowest layer.
The packaging material according to claim 1 or 2, wherein in the uppermost layer, the front end free end of the fifth region and the rear end free end of the first region facing each other come into contact with each other without overlapping. In the front-back direction
The third region is shorter than the length of the second region by the thickness of the planar article.
The packaging material according to claim 3, wherein the fourth region has a length substantially equal to that of the third region. The packaging material according to any one of claims 1 to 4, wherein the packaging material is paper. The packaging material according to any one of claims 1 to 5 and
A wrapping planar article comprising a planar article packaged by the packaging material. A release sheet whose back surface is fixed to the inner side surface of the packaging material is provided.
The planar article has an adhesive portion on the back surface and has an adhesive portion.
The packaging surface-like article according to claim 6, wherein the surface of the release sheet is detachably adhered to the adhesive portion of the surface-like article. In the uppermost layer, a fastening tape to be attached from above is provided so as to connect the free end of the Z-fold surface and the free end of the inner tri-fold facing each other.
The packaging surface according to claim 6 or 7, wherein the fastening tape has a strong sealing portion on the surface side of the inner tri-fold and a weak sealing portion that can be re-fastened and is peeled off at the time of use. State goods. The planar article according to any one of claims 6 to 8 is an absorbent article.
The absorbent article includes a liquid-permeable front surface sheet, a liquid-impermeable back surface sheet, and an absorbent body provided between the front surface sheet and the back surface sheet, and has an elongated shape elongated in a predetermined direction. A packaging absorbent article that is. It is an individual packaging method for packaging planar articles using packaging materials.
The packaging material has a first region, a second region, a third region, a fourth region, and a fifth region from the front side in the front-rear direction with a crease as a boundary.
A step of folding the boundary between the fourth region and the fifth region of the packaging material inward to make a valley fold.
A step of folding the boundary between the fourth region and the third region of the packaging material outward to make a mountain fold.
The process of developing habitual packaging materials and
A fixing step of fixing the planar article to the inner side surface within the range of the first region, the second region, and the third region of the packaging material.
A step of folding the third region of the packaging material inward together with the planar article at a boundary with the second region so that the fourth region is placed on the third region due to folding habits. When,
A step of folding the fifth region over the fourth region and pressing the fifth region at that position,
A step of folding the first region inward at a boundary with the second region so that the first region is folded inward together with the planar article so as to overlap the fourth region.
While pressing the first region from above, the front end free end of the fifth region whose position is pressed and the rear end free end of the facing first region are connected so as to be in contact with each other without overlapping. , The tape sticking process to stick the fastening tape from the top,
An individual packaging method comprising a edge sealing step of applying pressure to side seal both edges of the packaging material in the width direction orthogonal to the front-rear direction. It is an individual packaging method for packaging planar articles using packaging materials.
The packaging material has a first region, a second region, a third region, a fourth region, and a fifth region from the front side in the front-rear direction with a crease as a boundary.
A step of folding the boundary between the fourth region and the fifth region of the packaging material inward to make a valley fold.
A step of folding the boundary between the fourth region and the third region of the packaging material outward to make a mountain fold.
The process of developing habitual packaging materials and
A fixing step of fixing the planar article to the inner side surface within the range of the first region, the second region, and the third region of the packaging material.
By folding the third region of the packaging material inward together with the planar article at the boundary with the second region, the fourth region is placed on the third region due to the folding habit, and the said. A step in which the fifth region is partially placed on the fourth region, and
A step of folding the first region inward at a boundary with the second region so that the first region is folded inward together with the planar article so as to overlap the fourth region.
While pressing the fifth region and the first region from above, the front end free end of the fifth region and the rear end free end of the first region facing each other are connected so as to be in contact with each other without overlapping. , The tape sticking process to stick the fastening tape from the top,
An individual packaging method comprising a edge sealing step of applying pressure to side seal both edges of the packaging material in the width direction orthogonal to the front-rear direction.

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