JP7513515B2 - Stick-type packaging - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act (Part 1) ■ Date of sale: April 24, 2020 ■ Place of sale: Ito En Co., Ltd. (3-47-10 Honcho, Shibuya-ku, Tokyo) ■ Discloser: Sunstar Co., Ltd. ■ Details of the item sold: Sunstar Co., Ltd. sold a stick-type package containing the liquid contents invented by Takeda Kohei and Sadamitsu Takaaki to Ito En Co., Ltd. (Part 2) ■ Date of sale: May 20, 2020 ■ Place of sale: Aino Bosai Co., Ltd. (225-1 Haneo, Odawara City, Kanagawa Prefecture) ■ Discloser: Sunstar Co., Ltd. ■ Details of the item sold: Sunstar Co., Ltd. wholesaled a stick-type package containing the liquid contents invented by Takeda Kohei and Sadamitsu Takaaki to Aino Bosai Co., Ltd. (Part 3) ■ Date of sale: June 1, 2020 ■ Place of sale: Toyo Nainen Kogyosha Co., Ltd. (2-20-1 Kamikihonmachi, Miyamae-ku, Kawasaki City, Kanagawa Prefecture) ■ Discloser: Sunstar Inc. ■ Details of item sold: Sunstar Inc. sold a stick-shaped package containing a liquid content invented by Takeda Kohei and Sadamitsu Takaaki to Toyo Nainen Kogyosha Co., Ltd.

The present invention relates to a stick-type package for packaging liquid contents.

A stick-type package is known in which a liquid content is filled into a cylindrical body having a back-pasted section formed by welding the edges along the length of a long, thin packaging film, and the packaging film is sealed at both ends in the length direction. Such stick-type packages are highly portable and can prevent quality deterioration of the contents due to contact with the outside air, so they are used to package liquid contents such as mouthwash, liquid toothpaste, lotion, milky lotion, liquid supplements, and shampoo.

JP 2015-160617 A

However, in such stick-type packages, the liquid contents adhere to the inside of the seals at both ends in the length direction during filling, and the volume of the liquid contents expands when the package is welded, causing poor welding and resulting in leakage during transportation and storage. In the past, in order to prevent leakage due to poor welding, it was known to combine multiple linear pattern welds along the length of the package and spaced apart in the width direction with multiple linear pattern welds along the width direction and spaced apart in the length direction, but this did not completely prevent leakage.

The object of the present invention is to provide a stick-type package for packaging liquid contents that prevents liquid leakage from both ends in the length direction.

The inventors of the present invention have carried out intensive research in light of the above problems, and have surprisingly discovered that the above problems can be solved by providing a band-shaped welded portion that is wider than the other linear pattern welded portions in at least some of the linear pattern welded portions along the length direction of the stick-type package, in a seal portion consisting of multiple linear pattern welded portions that run along the length direction and are spaced apart in the width direction, and multiple linear pattern welded portions that run along the width direction and are spaced apart in the length direction.

The present invention includes, for example, the inventions described below.
Item 1.
A stick-type package in which an elongated packaging film is formed into a tubular body having a back-pasted portion in which edges along the length direction are welded together, and the packaging film is welded together at both ends in the length direction of the tubular body to form a sealed portion,
a sealing portion formed by combining a plurality of linear pattern welding portions along the length direction of the stick-type package and spaced apart in the width direction X, and a plurality of linear pattern welding portions along the width direction and spaced apart in the length direction, and at least a portion of the linear pattern welding portions along the length direction has a band-shaped welding portion that is wider than the linear pattern welding portions.
Item 2.
Item 2. The stick-type package according to item 1, characterized in that the band-shaped welded portion is provided on both ends in the width direction of the sealed portion.
Item 3.
3. The stick-type package according to item 2, wherein the band-shaped welded portion is further provided at the center in the width direction of the sealed portion.
Item 4.
Item 4. The stick-type package according to item 3, wherein the band-shaped welded portion is provided over the entire length of the sealed portion in the longitudinal direction.
Item 5.
5. A stick-type packaging body according to item 4, characterized in that a discharge section formed by not welding the packaging films to each other is provided in one of the sealed sections so as to protrude toward an end in the longitudinal direction.
Item 6.
6. A stick-type package according to item 5, characterized in that the discharge part is formed at a position close to one side in the width direction of the sealed part, the part of the discharge part that protrudes towards the end in the length direction and has the shortest distance from the end in the length direction is provided on the end in the width direction in a front view, and a notch part for opening is provided on the other end of the end in the width direction of the sealed part.
Item 7.
A method for manufacturing a stick-type package, comprising forming a thin and long packaging film into a tubular body having a back-pasted portion by welding edges along the length direction of the tubular body, and welding the packaging film to each other at both ends in the length direction of the tubular body to form a seal portion,
The method for producing a stick-type package, wherein the formation of the seal portion comprises a first step of forming a plurality of linear pattern welds along the length of the stick-type package and spaced apart in the width direction X, and a second step of forming a plurality of linear pattern welds along the width direction and spaced apart in the length direction, wherein at least a portion of the linear pattern welds along the length direction has a band-shaped weld that is wider than the linear pattern welds.

The stick-type package of the present invention provides a stick-type package for packaging liquid contents that prevents liquid leakage from the seals at both ends in the length direction.

FIG. 1 is a front view of a stick-type package according to an embodiment of the present invention. Rear view of the same Side view 1. V1-V1 sectional view of FIG. 1. V2-V2 sectional view of FIG. Enlarged view of the seal part in Figure 1 FIG. 13 is an enlarged view of a seal portion according to another embodiment of the present invention; FIG. 13 is an enlarged view of a seal portion according to another embodiment of the present invention; Enlarged view of the seal portion of Example 1 Enlarged view of the seal portion of Comparative Example 1 FIG. 13 is an enlarged view of a seal portion according to another embodiment of the present invention. FIG. 13 is an enlarged view of a seal portion according to another embodiment of the present invention. FIG. 13 is an enlarged view of a seal portion according to another embodiment of the present invention. FIG. 13 is an enlarged view of a seal portion according to another embodiment of the present invention.

Each embodiment included in the present invention will be described in more detail below with reference to the drawings. Note that the present invention is not limited to the embodiments shown below, but includes all of the embodiments disclosed in this specification that can be recognized by a person skilled in the art.

As shown in Figures 1 and 2, the stick-type package 1 is formed by welding together the edges of a long, thin packaging film along the length direction Y to form a cylindrical body 2 having a backing portion 4, and the inside of this cylindrical body 2 is filled with liquid contents 4. At the same time, the packaging film is welded together at both ends of the cylindrical body 2 in the length direction Y to form a seal portion 3.

The size of the stick-type package 1 is not particularly limited, and can be a size and volume appropriate for the amount of contents to be filled. For example, the size of the stick-type package 1 is 123 to 143 mm, more preferably 128 to 138 mm, and even more preferably 130 to 136 mm in the length direction Y, and 21.5 to 27.5 mm, more preferably 22.5 to 26.5 mm, and even more preferably 23.5 to 25.5 mm in the width direction X.

The width of the backing 4 is not particularly limited, but is, for example, 9 to 13 mm, more preferably 9.5 to 12.5 mm, and even more preferably 10 to 12 mm. If the width is less than 6 mm, sufficient welding strength cannot be ensured, and there is a risk that the backing may peel off when pressure is applied to the package. If the width exceeds approximately half the width of the package, the amount of packaging film used for one package will increase, reducing production efficiency and resulting in an undesirable appearance as a product.

As shown in FIG. 6, the seal portion 3 is formed by combining a plurality of linear pattern welded portions 6 that run along the length direction Y of the stick-type package 1 and are spaced apart in the width direction X, and a plurality of linear pattern welded portions 7 that run along the width direction X and are spaced apart in the length direction Y. At least some of the linear pattern welded portions 6 that run along the length direction have band-shaped welded portions 9 that are wider than the other linear pattern welded portions.

The width a of each linear pattern of the welded portion 6 and the width b of each linear pattern of the welded portion 7 are not particularly limited, but may be, for example, 0.2 to 0.8 mm, more preferably 0.3 to 0.7 mm, and even more preferably 0.4 to 0.6 mm. The width a' of the non-welded portion 6' between the welded portions and the width b' of the non-welded portion 7' are not particularly limited, but may be, for example, 0.2 to 1.8 mm, more preferably 0.5 to 1.5 mm, and even more preferably 0.8 to 1.2 mm. The above a and b, and a' and b' may each be configured to have the same width, or may be configured to have different lengths.

The width c of the band-shaped welded portion 9 is configured to be at least larger than the width a of the welded portion 6, and is, for example, 1.0 to 3.0 mm, more preferably 1.2 to 2.8 mm, and even more preferably 1.5 to 2.5 mm. The band-shaped welded portion 9 may be provided in one or more locations on the seal portion 3.

It is preferable that the band-shaped welded portion 9 is provided only in the direction along the length direction Y. If the band-shaped welded portion is provided in the direction along the width direction X, when the welded portion is welded while the liquid contents are attached to it, there is no space for the liquid contents to escape from the welded portion, so a large amount of the liquid contents may remain at the interface of the welded portion, which may result in poor welding.

The length of the sealed portion 3 in the longitudinal direction Y is not particularly limited, but is, for example, 5 to 11 mm, more preferably 6 to 10 mm, and even more preferably 7 to 9 mm. If the length of the sealed portion 3 is shorter than 5 mm, sufficient welding strength cannot be ensured, and there is a risk that the sealed portion will peel off when pressure is applied to the package. If the length of the sealed portion exceeds 11 mm, the amount of packaging film used for one package will increase, reducing production efficiency and resulting in an undesirable appearance of the product.

The length of the sealed portion 3 in the longitudinal direction Y may be the same over the entire width of the stick-shaped package 1, or may be changed in part to limit the length of the opening from which the liquid is discharged when the package is opened. More specifically, as shown in Figs. 7 and 8, the positions of both ends of the sealed portion 3 in the width direction X may be changed, and a mountain-shaped discharge portion 13 may be provided to protrude toward the sealed portion 3. In the embodiment shown in Figs. 7 and 8, the boundary line 12 between the sealed portion 3 and the liquid-filled portion 11 may be appropriately configured using a straight line or a curve such as an arc, but the length f of the liquid-filled portion 11 when a straight line extending in the width direction X of the package from the notch portion 10 that serves as the cutout for opening is drawn is, for example, 10 to 16 mm, more preferably 11 to 15 mm, and even more preferably 12 to 14 mm. The length e of the liquid-filled portion 11 that constitutes the discharge portion 13 when the package is opened is, for example, 7 to 13 mm, more preferably 8 to 12 mm, and even more preferably 9 to 11 mm. Additionally, the length of the shortest part of the seal portion 3 in the longitudinal direction Y is 5 to 11 mm, more preferably 6 to 10 mm, and even more preferably 7 to 9 mm.

Another embodiment of the present invention is shown in Figures 11a-11d.
13A shows a form in which, in a linear pattern along the length direction, strip-shaped welded portions wider than the welded portions of the other linear patterns are provided at both ends in the width direction of the sealed portion.
(b) is a form in which, in a linear pattern along the length direction, a band-shaped weld is provided at both ends of the width direction of the sealed portion, the band-shaped weld is wider than the welds of the other linear patterns, and the band-shaped weld does not reach the end of the sealed portion.
(c) is a form in which, in a linear pattern along the lengthwise direction, a band-shaped welding portion wider than the welding portions of the other linear patterns is provided on both ends of the widthwise direction of the sealed portion and on a longitudinal extension line passing through the base of the back paste, and the band-shaped welding portion does not reach the end of the sealed portion.
(d) is a form in which, in a linear pattern along the longitudinal direction, a band-shaped welding portion which is wider and has a curved surface than the welding portions of other linear patterns is provided on both ends in the width direction of the sealed portion and on an extension line in the longitudinal direction passing through the base portion of the back paste.

A brief description will be given of an example of a method for manufacturing the stick-type package 1 of the present invention. For example, a vertical multi-row automatic filling and packaging machine can be used to manufacture the stick-type package 1. A long, thin sheet-like packaging film is held in a cylindrical shape, and the edges along the length direction Y are welded to form the back-pasted portion 4. Next, the welded portion 7 in a linear pattern along the length direction Y of the stick-type package 1 is welded, and the liquid content is filled therein. After filling, the welded portion 8 in a linear pattern along the width direction X of the stick-type package 1 is welded over the welded portion 6 to form the sealed portion 3. Finally, the portion connected by the sealed portion 3 is cut to obtain the stick-type package 1. If necessary, the corners of the sealed portion 3 can be processed into a curved or arc shape.

The packaging film used in the present invention is not particularly limited, but may be, for example, an aluminum-deposited film or a film laminated with aluminum foil, which has excellent light-shielding and gas-barrier properties. These films generally consist of a surface layer made of polyethylene terephthalate resin, nylon, or the like; a barrier layer made of aluminum deposition or aluminum foil, or the like; an inner layer made of polyethylene terephthalate resin, nylon, or the like; and a sealant layer made of polyethylene resin, polyethylene terephthalate resin, or the like.

The thickness of the surface layer and the inner layer is not particularly limited, but is, for example, 9 to 15 μm, more preferably 10 to 14 μm, and even more preferably 11 to 13 μm.

The thickness of the barrier layer is not particularly limited, but for example, in the case of aluminum vapor deposition, it is 9 to 15 μm, more preferably 10 to 14 μm, and even more preferably 11 to 13 μm, and in the case of aluminum foil, it is 6 to 12 μm, more preferably 7 to 11 μm, and even more preferably 8 to 10 μm.

The thickness of the sealant layer is not particularly limited, but is, for example, 30 to 80 μm, more preferably 40 to 70 μm, and even more preferably 45 to 65 μm.

The liquid contents 4 filled into the stick-type package 1 of the present invention are not particularly limited, but examples include mouthwash, liquid toothpaste, lotion, milky lotion, liquid supplements, shampoo, etc. Among them, mouthwash, liquid toothpaste, lotion, liquid supplements, etc. have very low viscosity and the surface tension is reduced by the surfactant contained in the formulation, so that liquid leakage occurs even from the smallest gap, and therefore it is preferable to fill them into the stick-type package of the present invention.

The surfactant contained in the liquid content 6 filled in the stick-type package 1 of the present invention is not particularly limited, but may be a nonionic surfactant, anionic surfactant, or amphoteric surfactant. Specifically, nonionic surfactants include sugar fatty acid esters such as sucrose fatty acid esters, maltose fatty acid esters, and lactose fatty acid esters, fatty acid alkanolamides, sorbitan fatty acid esters, fatty acid monoglycerides, polyoxyethylene alkyl ethers with a polyoxyethylene addition coefficient of 4 to 15 and an alkyl group with 10 to 18 carbon atoms or polyoxyethylene alkylphenyl ethers with a polyoxyethylene addition coefficient of 10 to 18 and an alkyl group with 9 carbon atoms, diethyl sebacate, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbit fatty acid esters, polyethylene glycol fatty acid esters, polyethylene lanolin, polyethylene sterol, polyethylene lanolin alcohol, alkyl glucosides, and polyoxyethylene polyoxypropylene block copolymers. Examples of anionic surfactants include sulfate ester salts such as sodium lauryl sulfate and sodium polyoxyethylene lauryl ether sulfate, sulfosuccinate salts such as sodium lauryl sulfosuccinate and sodium polyoxyethylene lauryl ether sulfosuccinate, acyl amino acid salts such as sodium cocoyl sarcosine and sodium lauroyl methyl alanine, and sodium cocoyl methyl taurine. Examples of amphoteric surfactants include acetate betaine type surfactants such as lauryl dimethylamino acetate betaine and coconut oil fatty acid amidopropyl dimethylamino acetate betaine, imidazoline type surfactants such as N-cocoyl-N-carboxymethyl-N-hydroxyethyl ethylenediamine sodium, and amino acid type surfactants such as N-lauryl diaminoethyl glycine. These surfactants can be used alone or in combination of two or more.

In this specification, the term "comprising" includes "consisting essentially of" and "consisting of." In addition, the present invention includes any combination of the constituent elements described in this specification.

The present invention will be described in more detail below, but the present invention is not limited to the following examples.

As shown in Figure 9, Example 1 has a strip-shaped welded portion 9 in the direction along the length direction Y, and as shown in Figure 10, Comparative Example 1 has no strip-shaped welded portion. A sample filled with no contents and a sample filled with purified water were manufactured by a conventional method for the stick-shaped package of Example 1. The length of the seal portion 3 of the package is 8 mm, the width of the package is 24.5 mm, the width of the welded portion is 0.5 mm, and the width of the non-welded portion is 1.0 mm.

The packaging film used in this example has a surface and inner layer of polyethylene terephthalate, a barrier layer of aluminum vapor deposition, and a sealant layer, with a total thickness of approximately 93 μm.

[Seal Checker]
The cylindrical portion 3 of the sample not filled with the contents was cut in the width direction X, and the opening side seal portion 14 and the non-opening side seal portion 15 were cut leaving 1 mm from the boundary line 12 to prepare test pieces. A seal checker (manufactured by Fuji Impulse Co., Ltd.) was sprayed onto the inside of the test piece, and the test piece was left standing for 15 minutes in an upright position, after which a paper towel was pressed against the end of each sample to visually check for leakage.

[Pressure check]
The open side seal portion 14 and the non-open side seal portion 15 of the sample filled with purified water were cut off leaving 1 mm from the boundary line 12 to prepare test pieces. After pressing the center of the test piece by hand, a paper towel was pressed against the end of each sample to visually check for leakage.

Twelve samples were produced for each of the examples and comparative examples, and the number of samples in which leakage was confirmed by the above test is shown in Table 1.

As shown in Table 1, the stick-type package of the comparative example leaked when tested with both a seal checker and a pressure check filled with purified water, but the stick-type package of the example did not leak at all.

Below are examples of liquid contents that can be filled into the stick-type packaging of the present invention. The compounding amounts of each formulation are shown in mass % unless otherwise specified.

Liquid toothpaste1
70% sorbitol solution 10
Polyoxyethylene hydrogenated castor oil (60 E.O.) 5
Sodium fluoride 0.05
Chlorhexidine gluconate 0.05
Undecalactone 0.05
Fragrance 0.05
Sodium saccharin 0.01
Citric acid (appropriate amount)
Purified water Remainder
Total 100

Liquid toothpaste1
Glycerin 10
1,3-Propanediol 3
Low molecular weight agar 5
Polyoxyethylene hydrogenated castor oil (60 E.O.) 0.2
Cetylpyridinium chloride 0.05
l-Menthol 0.05
Tranexamic acid 0.05
Sodium saccharin 0.02
Methyl parahydroxybenzoate 0.01
Fragrance 0.05
Citric acid (appropriate amount)
Purified water Remainder
Total 100

Mouthwash 1
Ethanol 10
Glycerin 5
Citric acid 0.01
Sodium citrate 0.1
Polyoxyethylene hydrogenated castor oil (60 E.O.) 0.5
Methyl parahydroxybenzoate 0.1
Fragrance 0.2
Hesperidin 1
Vitamin E 0.05
Vitamin C 0.01
Purified water Remainder
Total 100

Mouthwash 1
Sodium lauryl sulfate 0.35
Polyoxyethylene (3) monoalkyl (12-14)
Disodium ether sulfosuccinate 0.02
Polyoxyethylene hydrogenated castor oil (60 E.O.) 1
Glycerin 8
1,3-Propanediol 3
Sucrose monolaurate fatty acid ester 0.3
Isopropyl methylphenol 0.05
Citric acid 0.01
Trisodium citrate 0.1
Sodium benzoate 0.2
Fragrance 0.1
Purified water Remainder
Total 100

DESCRIPTION OF SYMBOLS 1 Stick-type packaging body 2 Cylindrical body 3 Sealed portion 4 Back-pasted portion 5 Back-pasted base portion 6 Liquid content 7 Linear pattern welded portion along length direction Y 7' Non-welded portion of linear pattern along length direction Y 8 Linear pattern welded portion along width direction X 8' Non-welded portion of linear pattern along width direction X 9 Band-shaped welded portion along length direction Y 10 Notch portion 11 Liquid filling portion 12 Boundary line 13 Discharge portion 14 Opening side sealed portion 15 Non-opening side sealed portion

Claims (5)

A stick-type package in which an elongated packaging film is formed into a tubular body having a back-pasted portion in which edges along the length direction are welded together, and the packaging film is welded together at both ends in the length direction of the tubular body to form a sealed portion,
the seal portion is formed by combining a plurality of linear pattern welded portions along the length direction of the stick-type package and spaced apart in the width direction , and a plurality of linear pattern welded portions along the width direction and spaced apart in the length direction, and at least a portion of the linear pattern welded portions along the length direction has a band-shaped welded portion wider than the linear pattern welded portions,
The band-shaped welded portions are provided at both ends and a center portion in a width direction of the seal portion,
The width of the welded portion of the linear pattern along the longitudinal direction is 0.2 mm or more and 0.8 mm or less,
A stick-type package, characterized in that the width of the band-shaped welded portion is 1.0 mm or more and 3.0 mm or less . 2. The stick-type package according to claim 1 , wherein the band-shaped welded portion is provided over the entire length of the sealed portion in the longitudinal direction. The stick-type packaging body according to claim 2 , characterized in that a discharge portion formed by the packaging films not being welded to each other is provided in one of the sealed portions so as to protrude toward an end in the longitudinal direction. 4. The stick-type package according to claim 3, characterized in that the discharge portion is formed at a position closer to one side in the width direction of the sealed portion, the part of the discharge portion that protrudes toward the longitudinal end is located on the width direction end in a front view, and a notch portion for opening is located on the other end of the width direction end of the sealed portion. A method for manufacturing a stick-type package, comprising forming a thin and long packaging film into a tubular body having a back-pasted portion by welding edges along the length direction of the tubular body, and welding the packaging film to each other at both ends in the length direction of the tubular body to form a seal portion,
The formation of the seal portion includes a first step of forming a plurality of linear pattern welds along the length direction of the stick-type package and spaced apart in the width direction , and a second step of forming a plurality of linear pattern welds along the width direction and spaced apart in the length direction, and at least a portion of the linear pattern welds along the length direction has a band-shaped weld that is wider than the linear pattern welds,
The band-shaped welding portion is provided at both ends and a center portion in a width direction of the seal portion,
The width of the welded portion of the linear pattern along the longitudinal direction is 0.2 mm or more and 0.8 mm or less,
A method for producing a stick-type package, wherein the width of the band-shaped welded portion is 1.0 mm or more and 3.0 mm or less .

Images