JP2021172348A - Self-standing packaging bag - Google Patents

Abstract

To provide a flat self-standing packaging bag with a bottom gazette, having a relatively wide width and self-standing property, mainly used when packaging face masks having face shapes by folding into halves, resolving the problems of being inferior in self-standing stability and easily falling when displayed in a shopwindow.SOLUTION: A self-standing packaging bag is formed of a pair of front/rear side films and a bottom film arranged by folding inside into halves at the lower ends of the pair of front/rear side films, has a side seal and a bottom seal, and a gusset at the bottom side. The relationship of the seal width α of the bottom seal formed along the bottom edge of the self-standing packaging bag to the maximum width β of the gusset satisfies 5%≤(α/β)×100(%)≤15%.SELECTED DRAWING: Figure 3

Description

The present invention relates to a self-supporting packaging bag for a bottom gusset that houses contents such as retort pouch foods and cosmetics, and in particular, for packaging a face mask in which a face-shaped water-absorbent sheet base material is impregnated with cosmetics. Regarding self-supporting packaging bags.

As one of the makeup methods, the face surface is packed with a face mask in which a water-absorbent sheet base material such as a non-woven sheet is impregnated with cosmetics to give moisturizing and softness to the keratin of the skin, and stains on the skin surface. There is a method of removing dirt. As shown in FIG. 1, the water-absorbent sheet base material 20 has a face shape, that is, a substantially circular or elliptical shape so as not to cover a portion other than the face such as the head. When packaging the face mask, the folded water-absorbent sheet base material 20 as shown in FIG. 2 is inserted into the packaging bag, then filled with cosmetics, and the packaging bag is sealed and sealed. When a plurality of face masks (generally 10 to 50) are packaged together, a self-supporting packaging bag is often used so that cosmetics are not spilled and can be easily displayed at the store.

FIG. 3A is a front view of a conventional self-supporting package 501 in which a face mask is wrapped, and FIG. 3B is a cross-sectional view taken along the line ZZ'in FIG. 3A.
In the self-supporting packaging body 501, both sides of the front surface film 51 and the back surface film 52 arranged to face each other are side-sealed 54, and the bottom film 53 folded in half is inserted between the front surface film 51 and the back surface film 52. Therefore, the gusset portion 531 is formed by the bottom seal 55 having the shape of the bottom of the ship.
The bottom seal 55 of the self-supporting package 501 is often provided with a seal width α'of 8 mm or more in order to impart rigidity to the seal portion and impart self-reliance. By doing so, as shown in FIG. 3B, the gusset portion 531 of the bottom film 53 is slightly in contact with the floor surface, but basically the bottom seal 55 supports the self-supporting package 501 and becomes self-supporting. Is designed to be.

However, the self-supporting package 501 that is self-supporting with the bottom seal 55 as described above has a problem that the bottom seal is loaded by the weight of the contents and is easily collapsed when displayed at the store. So far, inventions such as those described in Patent Document 1 or Patent Document 2 have been disclosed as packaging bags intended to improve self-sustaining stability, but they are designed to wrap a plurality of face masks folded in half. It was difficult to impart self-sustaining stability to the relatively wide and flat packaging bag. Therefore, a packaging bag having excellent self-sustaining stability has been desired.

Japanese Unexamined Patent Publication No. 2005-335795 Japanese Unexamined Patent Publication No. 2016-78916

The present invention is inferior in self-supporting stability in a self-supporting packaging bag of a bottom gusset having a relatively wide and flat self-supporting property, which is mainly used when a face mask exhibiting a face shape is folded in a plurality of halves and packaged. , We are trying to provide a self-supporting packaging bag that can solve the problem that it is easy to fall down when it is displayed at the store.

That is, according to the present invention, in order to solve the above problems, the front and back films are composed of a pair of front and back films and a bottom film that is half-folded inward at the lower ends of the pair of front and back films, and is composed of a side seal and a bottom film. In a self-supporting packaging bag having a bottom seal and a gusset portion on the bottom side, the seal width α of the bottom edge seal portion of the bottom seal formed along the bottom edge of the self-supporting packaging bag and the gusset portion. Provided is a self-supporting packaging bag characterized in that the relationship of the maximum width β of 5% ≦ (α / β) × 100 (%) ≦ 15%.
Further, a self-supporting packaging bag in which the pair of front and back films have a horizontally long shape is provided.
Further, a self-supporting package having a maximum width β of the gusset portion of 60 mm or less is provided.

Further, the bottom seal is provided with a self-supporting packaging bag having a linear side bottom seal portion extending obliquely from the side seal toward the bottom edge seal portion on both side edges of the bottom edge seal portion. ..
Further, a self-supporting packaging bag characterized by being used for packaging a face mask is provided.

The self-supporting packaging bag of the present invention has an advantage that it is excellent in self-supporting stability and does not easily fall down when displayed at a store.

It is a top view which shows an example of the water-absorbing sheet base material which has a face shape and the peripheral edge has a substantially elliptical shape. FIG. 5 is a plan view showing a state in which the water-absorbent sheet base material of FIG. 1 is folded in half along a vertical folding line. (A) is a front view of a self-supporting packaging body in which a face mask is housed in a conventional self-supporting packaging bag and the opening is heat-sealed and packaged. It is a cross-sectional view. (A) is a front view showing one embodiment of the self-supporting packaging bag according to the present invention, and (b) is XX'in a state where the bottom film of the self-supporting packaging bag of (a) is expanded. It is a cross-sectional view. (A) is a front view of a self-supporting package containing a face mask showing a second embodiment of the present invention, (b) is a YY'cross-sectional view of (a), and (c). ) Is a cross-sectional view of the self-supporting packaging bag showing the state of (b) before the face mask is housed.

Hereinafter, embodiments of the self-supporting packaging bag of the present invention will be described with reference to FIGS. 4 to 5. The present invention is not limited to the following forms, and various forms can be taken as long as the same effect is exhibited.

FIG. 4A is a front view showing an embodiment of the self-supporting packaging bag 30 according to the present invention, and FIG. 4B is a bottom film 33 of the self-supporting packaging bag 30 of FIG. 4A. It is a cross-sectional view of XX'in the expanded state.
The self-supporting packaging bag 30 is composed of a pair of front and back films 31 and 32 and a bottom film 33 which is half-folded inward at the lower ends of the pair of front and back films 31 and 32, and includes a side seal 34 and a bottom film 33. It has a bottom seal 35 and has a gusset portion 331 on the bottom side.

The bottom seal 35 is an oblique bottom edge seal portion 351 formed along the bottom edge of the self-supporting packaging bag 30 and diagonally from the side seal 34 toward the bottom edge seal portion 351 on both sides of the bottom edge seal portion 351. A pair of extending side bottom seal portions 352 are provided.
As shown in FIG. 4B, when the bottom film 33 of the self-supporting packaging bag 30 is expanded, a gusset portion 331 having a predetermined area is formed on the bottom surface of the self-supporting packaging bag 30, and a space for accommodating the contents is provided. It is secured and is provided so as to be self-supporting by the sealed bottom edge seal portion 351.

In the self-supporting packaging bag 30 according to the present invention, the relationship between the seal width α of the bottom edge sealing portion 351 of the self-supporting packaging bag 30 and the maximum width β of the gusset portion 331 is 5 (%) ≦ (α / β). It is characterized in that × 100 (%) ≦ 15 (%) is satisfied.
The present invention has found that the self-supporting stability is improved by adjusting the seal width α of the bottom edge seal portion 351 and the maximum width β of the gusset portion 331 as described above. That is, in the conventional self-supporting package 501, as shown in FIG. 3 (b), the gusset portion 531 containing the contents is slightly in contact with the floor surface, and is basically self-supporting due to the rigidity of the bottom seal 55. In contrast to the above, the present invention has improved self-sustaining stability by making the bottom seal 35 and the gusset portion 331 compatible with each other. Specifically, in the self-supporting package 301 according to the second embodiment of the present invention, which will be described later, as shown in FIG. 5B, the gusset portion 331 is designed to be in contact with the floor surface so as to be self-supporting. It is an enhanced version.

The relationship between the seal width α of the bottom edge seal portion 351 and the maximum width β of the gusset portion 331 is preferably 7 (%) ≦ (α / β) × 100 (%) ≦ 14 (%), and in particular, 8 (%). ≦ (α / β) × 100 (%) ≦ 13 (%) is preferable, and further, 9 (%) ≦ (α / β) × 100 (%) ≦ 12 (%) is preferable.
When the value of (α / β) × 100 exceeds 15%, when the content is filled in the self-supporting packaging bag 30, the weight of the content is applied to the bottom edge seal portion 351 and the bottom seal 33 is gradually applied. Due to the rigidity of the packaging bag 30, the packaging bag 30 cannot stand on its own and easily falls down.
On the other hand, when the value of (α / β) × 100 is less than 5%, the seal width α of the bottom edge seal portion 351 may be narrow and the seal may be inferior in sealing.

The front surface film 31, back surface film 32, and bottom film 33 used in the self-supporting packaging bag 30 of the present invention are a single-layer film or a base material mainly made of synthetic resin, which is usually used for flexible packaging bags. A laminate having at least a sealant layer can be used. As the base material of the laminate, paper, metal foil, or synthetic resin film composed of one layer or several layers is used. For example, low density polyethylene resin (LDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (LLDPE), polypropylene resin (PP), polyolefin resin such as polyolefin elastomer, polyethylene terephthalate resin (PET). , Polybutylene terephthalate resin (PBT), polyester resin such as polyethylene naphthalate resin (PEN), cellulose resin such as ethylene vinyl alcohol copolymer resin (EVOH), cellophane, cellulose triacetate (TAC), polymethylmetha Polyane resin such as acrylate resin (PMMA), ethylene-vinyl acetate copolymer resin (EVA), ionomer resin, polybutene resin, polyacrylonitrile resin, nylon resin (NY), polystyrene resin (PS), polychloride Synthetic resin films such as vinyl resin (PVC), polyvinylidene chloride resin (PVDC), polycarbonate resin (PC), fluororesin, urethane resin, etc., and paper, metal foil, etc. are used alone or in combination. .. The synthetic resin film used as the base material may be either an unstretched film or a stretched film, but it is preferable to use a stretched film. The substrate includes, if necessary, a printing layer and an adhesive layer.

As the sealant layer of the laminate, a polyolefin resin is generally used, and specifically, a low density polyethylene resin, a medium density polyethylene resin, a linear low density polyethylene resin, an ethylene / vinyl acetate copolymer, and ethylene. -Ethry resins such as α-olefin copolymers, homopolypropylene resins, propylene / ethylene random copolymers, propylene / ethylene block copolymers, polypropylene resins such as propylene / α-olefin copolymers, etc. are used. .. In addition, a multilayer film in which these resins are composited may be used.

Specific examples of the structure of the laminate include a laminated film such as PET / printing layer / adhesive layer / aluminum foil / adhesive layer / LLDPE, NY / printing layer / adhesive layer / EVOH / adhesive layer / LLDPE. Examples thereof include a co-pressing multilayer film such as NY / adhesive resin layer / EVOH / adhesive resin layer / LLDPE.
In the present invention, it is preferable to use the same film for the front surface film, the back surface film and the bottom film, but different films may be used. For example, the same film may be used for the front film and the back film, and different films may be used only for the bottom film.

FIG. 5 (a) is a front view of the self-supporting packaging body 301 containing the face mask showing the second embodiment of the present invention, and FIG. 5 (b) is a cross-sectional view taken along the line YY'. 5 (c) is a cross-sectional view of the self-supporting packaging bag 30 showing the state before the face mask is housed in FIG. 5 (b).
The self-supporting package 301 is provided with a planned opening line 28, a chuck 29 for resealing, and a notch 27 at the upper part. In this embodiment, it is mainly designed to wrap a plurality of face masks folded in half, and is relatively flat with a height of 120 mm to 290 mm, a width of 140 mm to 300 mm, and a maximum width of a gusset portion of 20 mm to 60 mm. It is intended for bottom gusset flat bags.

The self-supporting packaging bag according to the present invention has a horizontally long front shape and is provided along the bottom edge of the self-supporting packaging bag even though the maximum width of the gusset portion is relatively narrow. The relationship between the seal width α of the bottom edge seal portion 351 of the formed bottom seal 35 and the maximum width β of the gusset portion 331 is 5 (%) ≤ (α / β) × 100 (%) ≤ 15 (%). By satisfying, it is excellent in self-sustaining stability.

As shown in FIG. 5B, when the contents are stored in the gusset portion 331, the gusset portion 331 bends and the gusset portion 331 comes into contact with the floor surface. In the present invention, since the area of the gusset portion 331 in contact with the floor surface is large, the weight of the stored contents is received by both the gusset portion 331 and the bottom seal 35. The independence of the body 301 is stable and it is possible to prevent it from falling over.

In this way, since the front shape of the self-supporting packaging bag is horizontally long, when packaging horizontally long contents such as a face mask, it twists or rotates inside the self-supporting packaging body during distribution or use. It can be packaged to maintain the condition of the contents without bagging. In the case of a self-supporting packaging bag having a vertically long front shape, the diameter of the peripheral edge where the bottom seal 35 contacts the floor surface is small, and the bottom seal 35 can be self-supporting only by the rigidity of the bottom seal 35. In the case of a sex packaging bag, the diameter of the peripheral edge where the bottom seal 35 comes into contact with the floor surface is large, and the independence is unstable only by the rigidity of the bottom seal 35, and the present invention is particularly effective.
It is particularly effective that the width of the front shape of the self-supporting packaging bag according to the present invention is 150 mm or more. The self-supporting packaging bag preferably has a height of 140 mm or more or 180 mm and a height of 250 mm or less or 230 mm or less, and a width of 160 mm or more or 190 mm or more and 280 mm or less or 250 mm or less in the front shape. Is preferable.

Further, in the present invention, it is effective when the shape is relatively flat, specifically, a self-supporting packaging bag in which the maximum width β of the gusset portion is 60 mm or less. For example, when packaging a face mask, a plurality of water-absorbent sheet base materials are inserted into a packaging bag and then filled with cosmetics. The wider the maximum width of the gusset portion, the more cosmetics are used. The product price will rise. Also, when displaying at the store, a flat surface allows more products to be placed and saves space. Further, in the present invention, such a flat self-supporting packaging bag is particularly preferable because it can impart stable self-supporting property.
The maximum width β of the gusset portion is particularly preferably 30 mm or more and 50 mm or less, and further preferably 35 mm or more and 48 mm or less.

Further, in the present embodiment, as the bottom seal 35, a pair of side bottom seal portions 352 extending diagonally from the side seal 34 toward the bottom edge seal portion 351 are provided linearly on both sides of the bottom edge seal portion 351. There is. Normally, the self-supporting packaging bag is provided with a ship bottom-shaped seal to enhance the self-supporting stability, but in the present invention, the side bottom seal portion 352 is made linear to expand the gusset portion 331. When the contents are opened and the contents are stored, the area in contact with the floor surface of the gusset portion can be increased, and the independence can be further stabilized.
Further, in the present embodiment, the bag is made so that the seal length σ inside the side bottom seal portion 352 of the bottom edge seal portion 351 is 60 to 90% of the seal length γ of the bottom edge seal portion 351. In particular, it is preferably 70 to 80%. If the value of (σ / γ) × 100 is less than 60%, the contact area with the floor surface of the gusset portion is reduced, and if the value of (σ / γ) × 100 is more than 90%, the self-supporting state is maintained. Inferior in terms of points.

(Example 1)
From a laminated film in which a biaxially stretched nylon film (thickness 15 μm), an aluminum foil (thickness 7 μm), and a linear low-density polyethylene (hereinafter referred to as L-LDPE) film (thickness 50 μm) are bonded together with an adhesive. A front film and a back surface film having a length of 220 mm and a width of 240 mm, and a bottom sheet having a length of 54 mm and a width of 240 mm are prepared, the L-LDPE film surfaces are opposed to each other, and both sides of the front surface film and the back surface film are heated. A side seal portion having a width of 5 mm is formed by sealing, and the bottom film is folded with the L-LDPE film side facing outward so that the maximum width of the gusset portion is 44 mm. On the lower side, a strip-shaped bottom edge seal portion having a seal width of 5 mm was provided. In addition, a linear side bottom seal portion that diagonally connects the side seal and the bottom edge seal portion is provided. The side bottom seal portion has a seal width of 5 mm, and the seal length inside the side bottom seal portion of the bottom edge seal portion is 180 mm. In this way, a self-supporting package having the shape shown in FIG. 4 was obtained.

Thirty sheets of the water-absorbent sheet base material shown in FIG. 1 were superposed on the self-supporting packaging bag, then folded in half, and inserted into the packaging bag with the folding line side facing up (opening side facing down). Further, after adding the cosmetic liquid to the packaging bag, the upper part was sealed with a heat seal so as not to leave as much air as possible to prepare a self-supporting packaging body.

In order to evaluate the self-sustaining stability of the self-supporting package, when the state of being pushed by the fingers from the side in the self-supporting state was observed, the self-supporting state was maintained without falling.
The results are shown in Table 1.

(Comparative Example 1)
The seal width of the bottom edge seal portion was set to 8 mm, and the shape of the bottom seal was the same as that of the first embodiment except that the shape of the bottom seal was a ship bottom shape, and a self-supporting package having the shape shown in FIG. 3 was prepared.
When the self-supporting package was evaluated for its resistance to falling by the same method as in Example 1, it was more likely to fall than in Example 1.
The results are shown in Table 1.

20 Water-absorbent sheet base material 28 Scheduled opening line 29 Chuck 27 Notch 30 Free-standing packaging bag 301, 501 Free-standing packaging 31, 51 Front film 32, 52 Back film 33, 53 Bottom film 331, 513 Gazette section 34, 54 Side Seals 35, 55 Bottom seal 351 Bottom edge seal 352 Side bottom seal α Bottom edge seal seal width α'Bottom seal seal width β Maximum gusset width γ Bottom edge seal length σ Bottom edge seal Seal length inside the side bottom seal part

Claims (5)

It consists of a pair of front and back films and a bottom film that is half-folded inward at the lower ends of the pair of front and back films, has a side seal and a bottom seal, and has a gusset on the bottom. In the packaging bag
The relationship between the seal width α of the bottom edge seal portion of the bottom seal formed along the bottom edge of the self-supporting packaging bag and the maximum width β of the gusset portion is 5% ≦ (α / β) × 100 ( %) ≤ 15%, a self-supporting packaging bag. The self-supporting packaging bag according to claim 1, wherein the pair of front and back films have a horizontally long shape. The self-supporting package according to claim 1 or 2, wherein the maximum width β of the gusset portion is 60 mm or less. Claims 1 to 3 include the bottom seal portion provided with linear side bottom seal portions extending obliquely from the side seal toward the bottom edge seal portion on both side edges of the bottom edge seal portion. The self-supporting packaging bag according to any one of the above. The self-supporting packaging bag according to any one of claims 1 to 4, wherein the bag is for packaging a face mask.

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