JP3703676B2 - Packaging bag - Google Patents

Description

【００２４】
本発明の包装袋が対象とするものは、湿気及び酸素遮断性を必要とするもの、例えばお茶の葉類等である。お茶の葉類としては、例えば、煎茶、焙じ茶、玉露、かぶせ茶、てん茶、嬉野茶、青柳茶、各種中国茶等の不発酵茶；包種茶、鉄観音茶、ウーロン茶等の半発酵茶；紅茶等の発酵茶；阿波番茶、碁石茶、プアール茶等の後発酵茶を挙げることができる。また、海苔類として、乾燥海苔、焼き海苔等が挙げられる。菓子類として、クッキー、あめ、煎餅、スナック、チョコレート等が挙げられる。調味料類として、コショウ、砂糖等が挙げられる。乳製品類として、粉乳、クリーム、牛乳、ヨーグルト等が挙げられる。ジュース類としては、ミカン、リンゴ、ブドウ、バナナ、パイナップル、桃、グレープフルーツ等の果汁や、トマト、野菜等、上記の混合物が挙げられる。粉末類として、スリゴマ、きな粉、そば粉、小麦粉、米粉、インスタントティー、粉末ジュース等が挙げられる。詰め替え洗剤として、ボディーシャンプー、リンス、衣類洗剤等が挙げられる。嗜好飲料として、コーヒー、ココア等が挙げられる。油類として、サラダ油、ゴマ油、大豆油、菜種油、米ぬか油、コーン油等が挙げられる。
【００２５】
【発明の効果】
以上説明したように、本発明は、外面層とアルミニウム層と内面層と熱接着性樹脂層を積層してなるループスティフネスが０．１〜０．２Ｎ（ニュートン）の範囲にある矩形状の積層フィルムで構成され、該積層フィルムの両端縁をその内面が対向するように接着した合掌熱接着部と該合掌熱接着部と平行な両端縁に内方への折込部とが形成された状態で該合掌熱接着部の両端縁を接着した一対の端縁熱接着部とを設けることにより形成されたガセット式の包装袋であって、前記内面層がレーザーを吸収する層であり、該内面層がレーザーにより前記端縁熱接着部の一方に近い合掌熱接着部に形成された切込から前記端縁熱接着部の方向にＶ字状に延びる切目線が形成された構成としたので、アルミニウム層の内側に積層されたレーザー吸収層に形成された切目線が包装袋の表面から見えないため、外観を損なうことなく、合掌熱接着部の切込から切目線に沿って手で簡単に引き裂き開封することができる。
【図面の簡単な説明】
【図１】本発明に係る包装袋の第１実施形態を示す斜視図である。
【図２】図１に示す包装袋を開封した状態で示す斜視図である。
【図３】開封した包装袋から内容物を出す状態を示す斜視図である。
【図４】本発明に係る包装袋の第２実施形態を示す斜視図である。
【図５】図１に示す包装袋を作製するのに用いられる連続した積層フィルムを示す平面図である。
【図６】積層フィルムの一構成例を示す断面図である。
【符号の説明】
２ 合掌熱接着部
２’合掌熱接着領域
３ａ, ３ｂ 端縁熱接着部
３ａ’, ３ｂ’ 端縁熱接着領域
４ 切込
５，５ａ，５ｂ，５ｃ, ５ｄ 切目線
６ 折込部
６’折込部領域
７ 開口
８ カット線
１１ 炭酸ガスレーザー吸収層
１２ ガスバリヤー層
１３ 熱接着性樹脂層
１４ プラスチックフィルム層
１５ 接着層
２１ 受け部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gusset-type packaging bag that does not impair the design that is suitably used when packaging moisture and oxygen barrier properties such as tea leaves.
[0002]
[Problems to be solved by the invention]
Conventionally, various types of packaging bags have been used for various purposes depending on their functions. Among them, as a packaging bag considering easy-openability, a tearable film such as a uniaxially stretched film is used in the construction of the laminated film, and it is torn from the notch in the edge thermal bonding part. There are known a seal bag and a pillow bag in which tear tape is attached to the inner surface of a bag instead of a film having tearing direction and the tear tape is circulated around a trunk portion to form an opening. However, in the case of a gusset-type packaging bag, since the folding portions are located on both sides thereof, it cannot be opened by the opening means as described above. Further, as disclosed in Japanese Utility Model Laid-Open No. 3-81857 and Japanese Utility Model Laid-Open No. 1-85242, there is known an easy-opening method by forming a rough surface for opening on an end portion of a bag or a heat-bonding portion of a palm. However, there is a risk that moisture and oxygen barrier properties may be impaired in a bag having a rough surface for opening at the end. Moreover, it was difficult to tear the laminated film easily by hand, and it was impossible to open the contents without spilling.
[0003]
On the other hand, in the case of gusset bags used for tea leaves, etc., they are often displayed and sold at the storefront with the front standing, and they are not used for packaging bags such as instant noodles. In laminated film, the packaging bag itself is wrinkled, and the contents are strips of tea leaves. As the time elapses, the bag accumulates downward due to vibration, etc. Could look bad. In order to solve this problem, conventionally, a stretched film is laminated on both the inner and outer surfaces of an aluminum foil as a barrier layer so as to have a waist. Specifically, the laminated film was cut into a 15 mm × 150 mm strip, a circular loop having a diameter of 80 mm was formed near the center of the strip, and the load applied when the circular loop was pushed 15 mm from the outside was expressed as loop stiffness. In this case, when the condition that the loop stiffness of the laminated film was 0.1 N (Newton) or more was cleared, the above problem could be solved. In addition, when the loop stiffness exceeded 0.2N, it was difficult to make a bag with the laminated film. (Here, the loop stiffness in the present invention was measured using a “loop step stiffness tester” manufactured by Toyo Seiki Seisakusho Co., Ltd. Since the unit of measurement by this apparatus is g, 1 kgF≈9.8 N However, if the laminated film has a waist as described above, the strength of the laminated film itself becomes very large, which makes it difficult to tear. Conventional gusset bags cannot be opened without using scissors. It was inconvenient.
[0004]
The present invention has been made in view of such circumstances, and the object of the present invention is that it can be easily teared and opened by hand even though it is composed of a laminated film with a waist, and the cut line cannot be seen from the surface. To provide a packaging bag.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the packaging bag of the present invention has a loop stiffness formed by laminating an outer surface layer, an aluminum layer, an inner surface layer, and a heat-adhesive resin layer in a range of 0.1 to 0.2 N (Newton). It is composed of a certain rectangular laminated film, and has a palm heat bonding part in which both edges of the laminated film are bonded so that inner surfaces thereof face each other, and an inward folding part at both edge edges parallel to the palm heat bonding part. A packaging bag formed by providing a pair of edge thermal bonding portions bonded to both edges of the joint thermal bonding portion in the formed state, wherein the inner surface layer is a layer that absorbs laser, A cut line extending in a V shape in the direction of the edge thermal bonding portion from an incision formed in the palm thermal bonding portion close to one of the edge thermal bonding portions by an laser is formed on the inner surface layer. To do.
[0006]
And in said packaging bag, it becomes possible to give a waist to a laminated film easily and cheaply by comprising both the outer surface layer and inner surface layer of a laminated film with a polyester film. By applying this characteristic, contents that require moisture and oxygen barrier properties that have an unprecedented function that can be easily opened while maintaining an excellent appearance at the time of store display, especially tea leaves Suitable packaging bags can be made.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a perspective view showing a first embodiment of a packaging bag according to the present invention, FIG. 2 is a perspective view showing the packaging bag shown in FIG. 1 in an opened state, and FIG. 3 is a state in which contents are taken out from the opened packaging bag. FIG. 4 is a perspective view showing a second embodiment of the packaging bag according to the present invention, FIG. 5 is a plan view showing a continuous laminated film used for producing the packaging bag shown in FIG. 6 is a cross-sectional view showing a structural example of a laminated film, 2 is a palm heat-bonding portion, 3a and 3b are edge heat-bonding portions, 4 is a cut, 5, 5a, 5b, 5c and 5d are score lines, 6 is a folding part, 7 is an opening, 8 is a cut line, 2 ′ is a joint thermal bonding region, 3a ′ and 3b ′ are edge thermal bonding regions, 6 ′ is a folding region, 11 is a carbon dioxide laser absorption layer, 12 Is a gas barrier layer, 13 is a thermally adhesive resin layer, 14 is a plastic film layer, 15 is an adhesive layer, and 21 is a receiving part. Represent.
[0009]
The first embodiment of the packaging bag according to the present invention is as shown in FIG. 1 and is composed of a laminated film provided with a carbon dioxide laser absorption layer and an inner surface heat-adhesive resin layer. The bag is a gusset type bag formed by the edge thermal bonding portion 3a and the lower edge thermal bonding portion 3b and having inward folding portions 6 formed at both side ends parallel to the palm thermal bonding portion 2. Then, a notch 4 is formed at the side end of the palm thermal bonding portion 2 close to one edge thermal bonding portion 3a, and a score line 5a crossing the palm thermal bonding portion 2 from the slit 4 and the score line 5a. A straight cut line 5b and a cut line 5c that reach both sides of the inner edge of the edge thermal bonding portion 3a from the inner end of the film are formed by irradiating the carbon dioxide laser absorption layer constituting the laminated film with laser. . In the first embodiment, the distance between the inner edge of the edge thermal bonding portion 3a and the cut 4 and the distance between the cut line 5b and the position of the cut line 5c in contact with the inner edge of the edge thermal bonding portion 3a are arbitrarily set. Can do.
[0010]
In addition to carbon dioxide lasers, lasers in the ultraviolet range such as excimer lasers, and lasers in the visible to near infrared range such as argon ion lasers, semiconductor lasers, and YAG lasers, are also available. The infrared light is 10.6 μm, and light of this wavelength is absorbed by a specific packaging material such as polyester, nylon, polycarbonate, cellophane and the like. Therefore, by collecting the carbon dioxide laser beam and irradiating these film surfaces, the irradiated part of the film can be removed by heat generation, melting, mist formation, heat generation, decomposition, ashing, etc. However, the film such as polyethylene and polypropylene permeates and is difficult to process due to less absorption. Therefore, by laminating these absorbing materials and non-absorbing materials and then irradiating with a carbon dioxide laser, it is possible to selectively form a score line only in the absorbing layer.
[0011]
The state where the packaging bag shown in FIG. 1 is opened is as shown in FIG. By grasping the upper part of the notch 4 formed at the side edge of the joint heat bonding part 2 and pulling it upward, the laminated film of the joint heat bonding part 2 can be cut along the cut line 5a from the part of the notch 4. Cut from the inner end of the cut line 5a into a V shape so as to reach both sides of the inner edge of the edge thermal bonding portion 3a along the cut line 5b and the cut line 5c, as shown in FIG. Since the triangular opening 7 adjacent to the edge thermal bonding part 3a having the part 3a as a base and the cut line 5b and the cut line 5c being oblique sides can be formed, the contents can be taken out from the opening 7. In addition, the portion surrounded by the edge thermal bonding portion 3a, the cut line 5b, and the cut line 5c is folded upward, and as shown in FIG. It becomes easy to pour out the contents as a guide. By changing the distance between the inner edge of the edge thermal bonding part 3a and the cut 4 and the distance between the cut line 5b and the position of the cut line 5c in contact with the inner edge of the edge thermal bonding part 3a, the triangular opening 7 is formed. Since the shape can be changed, the shape of the opening 7 that can be easily taken out may be set depending on the type of contents. Further, in the present invention, since a laminated film having a loop stiffness of 0.1 N or more is used, the shape shown in FIG. 3 is held by the force of grasping and grasping the left and right ends of the bag in which the folding portion 6 is formed. It becomes easy and very easy to use.
[0012]
In the second embodiment of the packaging bag according to the present invention, as shown in FIG. 4, only the notch 4 is provided in the joint heat bonding portion 2, and a substantially triangular receiving portion 21 is formed at a corresponding position. As described above, the auxiliary cut line 5d is provided in the middle of the cut line 5b and the cut line 5c in the vicinity of the palm-to-grind heat bonding portion 2. In the packaging bag of this form, even when the position where the cut 4 is formed is shifted or the tear from the cut 4 is shifted up and down due to the force applied by the opener, the opening can be reliably performed. .
[0013]
A laminated film for continuously making the packaging bag shown in FIG. 1 is as shown in FIG. The continuous laminated film has a predetermined width for producing a gusset-type packaging bag, and the laminated film is provided with a two-sided thermal bonding area 2 'having a predetermined width and the length of the bag in the vertical direction. Is provided with an edge thermal bonding region 3b 'at the upper part and an edge thermal bonding region 3a' at the lower part of the laminated film. A pair of cuts 4 are formed at positions spaced from the lower edge of the edge thermal bonding region 3a ′ at an interval corresponding to the length of the bag in the vertical direction. A cut line 5a crossing the bonding region 2 'is formed, and a cut line 5b reaching from the inner end of the cut line 5a to the intersection of the inner end of the edge thermal bonding region 3a' and the outer edges of the folded portion forming regions 6 'on both sides; The cut line 5c is formed.
[0014]
The continuous laminated film shown in FIG. 5 is subjected to a bag making machine, and the heat-bonding areas 2 'on both sides of the continuous laminated film are combined and thermally bonded together, and thermally bonded and cut at the edge thermal bonding area 3b'. The bag making is completed by cutting at line 8. After filling the completed packaging bag with the contents, the edge thermal bonding region 3a ′ is thermally bonded, whereby the packaging bag of the first embodiment shown in FIG. 1 is completed. In the process of making a bag with a bag making machine using a laminated film slit to a predetermined width, the laminated film is irradiated with a carbon dioxide gas laser to form a score line at a predetermined position and to form a cut. .
[0015]
The laminated film for producing the easy-open packaging bag of the embodiment of the present invention can be configured as shown in FIG. In the laminated film shown in FIG. 6, a plastic film layer 14, an adhesive layer 15, a gas barrier layer 12, an adhesive layer 15, a carbon dioxide laser absorption layer 11, an adhesive layer 15, and a thermal adhesive resin layer 13 are laminated in order from the outside. The cut line 5 is formed in the carbon dioxide laser absorption layer 11 by irradiating the carbon dioxide laser from the inner surface. Specific examples of laminated structures include polyester film (PET) / extruded polyethylene (EC) / aluminum foil (Al) / EC / PET / EC / polyethylene film (PEF), biaxially oriented polypropylene film (OPP) / EC / Al / EC / PET / EC / PEF, PET / EC / Al / EC / 2 biaxially stretched nylon film (ON) / EC / PEF, and the like.
[0016]
As the carbon dioxide laser absorption layer 11, as described above, a film of polyester, nylon, polycarbonate, cellophane, or the like can be used.
[0017]
As the heat-adhesive resin layer 13, polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-α olefin copolymer polymerized using a single site catalyst, or the like can be used. These films have a property of transmitting a carbon dioxide laser with little absorption, and no cut line is formed even when irradiated with a carbon dioxide laser.
[0018]
The gas barrier layer 12 is most preferably an aluminum foil, but it is also possible to use a plastic film having an aluminum vapor deposition layer.
[0019]
As the plastic film layer 14, a polyester film, a biaxially stretched polypropylene film, a biaxially stretched nylon film, or the like can be used.
[0020]
Here, when used in bags that are sold in vertical pillow bags or gusset bags, especially bags that are often sold for sale, such as tea leaves, wrinkles on the surface In order to prevent the occurrence of the phenomenon that the bag is not easily generated and the contents are accumulated downward due to the passage of time or vibration, and the bag itself is swollen down, the strength of the bag itself is important. 11 and the plastic film 14 are preferred, that is, a polyester film. The polyester film referred to in the present invention mainly means biaxially stretched polyethylene terephthalate.
[0021]
Therefore, for the six types of laminated films having the following layer structure, the loop stiffness indicating the strength is measured, and the contents (tea leaves 100 g) are put in the bag-formed gusset bag, and the lower part is placed on a flat plate such as a desk. In order to examine the bottom bulge in a state where it was naturally dropped 10 times vertically from a height of 10 cm, the change in the maximum thickness of the trunk was measured and the appearance was visually checked. The measurement results are shown in Table 1. In the table, TD and MD indicate the flow direction and the width direction during bag making of the laminated film shown in FIG. The size of the gusset bag is 240 mm long, 65 mm wide, and 25 mm folded. Note that PE shown below is an extruded polyethylene layer, PEF is a polyethylene film layer, and LM is a dry laminate (adhesive) layer.
[0022]
(1) PET (12 μm) / PE (15 μm) / Al (7 μm) / PE (15 μm) / PET (12 μm) / PE (15 μm) / PEF (50 μm)
(2) PET (12 μm) / PE (15 μm) / Al (7 μm) / PE (15 μm) / PET (12 μm) / PE (15 μm) / PEF (25 μm)
(3) PET (12 μm) / LM / Al (7 μm) / LM / PET (12 μm) / LM / PEF (50 μm)
(4) PET (12 μm) / PE (15 μm) / Al (7 μm) / PE (15 μm) / ON (15 μm) / PE (15 μm) / PEF (50 μm)
(5) PET (12 μm) / LM / Al (7 μm) / LM / ON (15 μm) / LM / PEF (35 μm)
(6) PET (12 μm) / PE (15 μm) / Al (7 μm) / PEF (40 μm)
[0023]
[Table 1]

[0024]
The packaging bag of the present invention is intended for moisture and oxygen barrier properties, such as tea leaves. Examples of tea leaves include non-fermented teas such as sencha, roasted tea, gyokuro, kabuse tea, tencha, ureno tea, aoyagi tea and various Chinese teas; A fermented tea such as black tea; and post-fermented teas such as Awaban tea, Goishi tea, and Puer tea. Examples of the laver include dried laver and grilled laver. Examples of confectionery include cookies, candy, rice crackers, snacks, and chocolates. Seasonings include pepper and sugar. Examples of dairy products include powdered milk, cream, milk, and yogurt. Examples of juices include fruit juices such as mandarin oranges, apples, grapes, bananas, pineapples, peaches, grapefruits, tomatoes, vegetables, and the like, and mixtures thereof. Examples of powders include sorghum, kinako, buckwheat flour, wheat flour, rice flour, instant tea, and powdered juice. Examples of refill detergents include body shampoos, rinses and clothes detergents. Examples of favorite beverages include coffee and cocoa. Examples of oils include salad oil, sesame oil, soybean oil, rapeseed oil, rice bran oil, and corn oil.
[0025]
【The invention's effect】
As described above, the present invention is a rectangular laminate in which the loop stiffness formed by laminating the outer surface layer, the aluminum layer, the inner surface layer, and the thermoadhesive resin layer is in the range of 0.1 to 0.2 N (Newton). In a state in which a laminated heat-bonding portion composed of a film and bonded to both ends of the laminated film so that the inner surfaces thereof are opposite to each other, and inwardly folded portions are formed at both end edges parallel to the combined heat-bonding portion A gusset-type packaging bag formed by providing a pair of edge thermal bonding portions bonded to both ends of the joint thermal bonding portion, wherein the inner layer is a layer that absorbs laser, and the inner layer Since a cut line extending in a V shape in the direction of the edge thermal bonding portion is formed from a notch formed in the joint thermal bonding portion near one of the edge thermal bonding portions by a laser, aluminum is used. Laser absorption laminated inside the layer Since the score line formed is not visible from the surface of the packaging bag, without impairing the appearance, it can be easily tearing open by hand along the score line from the notch of the rafter heat-bonding portion.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a packaging bag according to the present invention.
2 is a perspective view showing a state in which the packaging bag shown in FIG. 1 is opened. FIG.
FIG. 3 is a perspective view showing a state in which contents are taken out from the opened packaging bag.
FIG. 4 is a perspective view showing a second embodiment of the packaging bag according to the present invention.
5 is a plan view showing a continuous laminated film used for producing the packaging bag shown in FIG. 1. FIG.
FIG. 6 is a cross-sectional view showing a structural example of a laminated film.
[Explanation of symbols]
2 Joint heat bonding part 2 'Joint heat bonding area 3a, 3b Edge heat bonding part 3a', 3b 'Edge heat bonding area 4 Cut 5, 5a, 5b, 5c, 5d Cut line 6 Folding part 6' Folding part Area 7 Opening 8 Cut line 11 Carbon dioxide laser absorption layer 12 Gas barrier layer 13 Thermal adhesive resin layer 14 Plastic film layer 15 Adhesive layer 21 Receiving part

Claims (4)

A loop stiffness formed by laminating an outer surface layer, an aluminum layer, an inner surface layer, and a heat-adhesive resin layer is a rectangular laminated film having a range of 0.1 to 0.2 N (Newton), and both ends of the laminated film. Gluing the two ends of the jointed heat-bonding part with the two-sided heat-bonding part with the edges facing each other and the inwardly folded part at both edges parallel to the jointing heat-bonding part A package bag formed by providing a pair of edge thermal bonding portions, wherein the inner surface layer is a layer that absorbs laser, and the inner surface layer is close to one of the edge thermal bonding portions by a laser. A packaging bag characterized in that a cut line extending in a V shape in the direction of the edge thermal bonding portion is formed from a notch formed in a palm thermal bonding portion. The packaging bag according to claim 1, wherein both the outer surface layer and the inner surface layer of the laminated film are made of a polyester film. The packaging bag according to claim 1 or 2, wherein the packaging bag is used for packaging moisture and oxygen barrier properties. The packaging bag according to claim 3, wherein the moisture and oxygen barrier properties are tea leaves.

Images