JP2003063537A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag capable of accurately ripping off from the starting position for ripping along an incision and of obtaining a fine opening portion. SOLUTION: The packing bag is characterized in that it comprises a thermal bonding resin layer for the tight-sealed inner layer on a peripheral thermal bonded portion, with a straight incision line for opening the packing bag from the outer edge of the peripheral thermal bonded portion provided on at least one of the layers other than the foregoing inner layer, a region of cut traces, provided on the peripheral thermal bonded portion, consisting of a plurality of minute through holes piercing the packaging bag from the outer edge of the peripheral thermal bonded portion into the inside, the region including the incision line, and two lines of guiding means, provided on the peripheral thermal bonded portion, which taper off toward the incision line from the outer edge side of the peripheral thermal bonded portion into the inside so that both the end portions thereof on the outer edge side sandwich the region of cut traces.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a packaging bag which can be easily torn and opened, and more specifically,
The present invention relates to a packaging bag that can be torn along a score line to obtain a beautiful opening.

[0002]

2. Description of the Related Art Conventionally, as a packaging bag 81 which is torn and opened along a planned opening line 83, for example, a V-shaped pattern shown in FIG. 8 is provided at a position where the planned opening line 83 intersects with an outer edge of a peripheral heat bonding portion 82. A cutout 84 having a shape, a pentagonal shape (not shown), a U-shape (not shown), or the like is provided, and when the packaging bag 81 is torn from the cutout 84, the packaging bag 81 can be torn along the opening line 83. Is configured. However, if the notch 84 as described above is provided on the outer edge of the peripheral heat-bonding portion 82 of the packaging bag, the packaging bag 81 may be broken from the notch 84 due to force majeure, or the packaging that constitutes the packaging bag 81. When the material has rigidity, problems such as cutting fingers with the notches 84 when handling the packaging bag 81,
Alternatively, there is a possibility that a problem may occur in that it cannot be accurately torn along the opening line 83.

As a packaging bag for solving the above problems, there is a packaging bag as disclosed in Japanese Patent Laid-Open No. 10-119984, for example. The packaging bag disclosed in Japanese Unexamined Patent Publication No. 10-119984 has a puncture hole in the outer edge side region of the peripheral heat-bonding portion where the planned opening line or a cut line corresponding to the planned opening line intersects the peripheral heat-bonding portion. The following scars are formed. However, in the packaging bag having this structure, since the scratches are formed with a constant width so as to include the planned opening line or the cut line, the planned opening line or the unsealing line may be formed depending on the tearing start position of the packaging bag. There was a problem that it was difficult to open because of deviation from the score line.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and its purpose is to provide a peripheral heat bonding portion without a notch.
An object of the present invention is to provide a packaging bag that can be accurately torn from the tearing start position along the score line and that can obtain a beautiful opening.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention provides a packaging bag having a heat-adhesive resin layer as an inner layer sealed by a peripheral heat-adhesive portion. There, a linear cut line for opening the packaging bag from the outer edge of the peripheral heat-bonding portion is provided in at least one layer other than the inner layer, and the peripheral heat-bonding portion includes the cut line and the peripheral heat A scar group region composed of a plurality of fine puncture holes penetrating the packaging bag from the outer edge of the adhesive portion to the inner side is provided, and the peripheral thermal adhesive portion is provided with the cut line inward from the outer edge side of the peripheral thermal adhesive portion. It is characterized in that two guide means tapering toward each other are provided so that both ends on the outer edge side sandwich the scratch group region.

The present invention according to claim 2 provides the invention according to claim 1.
The packaging bag described above is characterized in that the guide means is a score line provided through the packaging bag.

The present invention according to claim 3 provides the invention according to claim 1.
In the packaging bag described above, the guide means is a half-cut formed from the front side of the packaging bag, leaving at least the thermoadhesive resin layer.

The present invention according to claim 4 provides the invention according to claim 1.
The packaging bag described in the above is characterized in that the guide means is a pressing die formed by embossing the packaging bag.

According to the above-mentioned structure, the packaging bag can be easily torn and opened with the scar group region as the tear start position, and the guide bag can be torn along the score line. Therefore, the packaging bag can obtain a beautiful opening. Further, by using the guiding means according to any one of claims 2 to 4, since the tearing start position of the packaging bag can be understood by touching it with fingers, the packaging suitable for the visually impaired person as well. It can be a bag.

Further, the invention according to claim 5 is based on claim 1
4. The packaging bag according to any one of 4 above, wherein the peripheral edge heat-bonding portion is formed at a position facing each other, and the cut line is formed orthogonal to the peripheral edge heat-bonding portion. With this configuration, the scratch group region of any one of the peripheral edge heat-bonded portions can be set as the tear start position, so that convenience is improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention described above will be described in detail below with reference to the drawings. 1 is a plan view showing a first embodiment of a packaging bag according to the present invention, FIG. 2 is an enlarged plan view of an essential part of FIG. 1, FIG. 3 is a sectional view taken along line XX of FIG. 2, and FIG. The figure corresponding to FIG. 3 which shows 2nd Embodiment of such a packaging bag, FIG.
3 is a view corresponding to FIG. 3 showing a third embodiment of the packaging bag according to the present invention, FIG. 6 is a view corresponding to FIG. 2 showing a fourth embodiment of the packaging bag according to the present invention, and FIG. 7 is shown in FIG. It is a figure corresponding to Drawing 3 of a 4th embodiment shown, and is 1,1 ', 1 "in a figure,
1 '''is a packaging bag, 2 is a peripheral heat-bonded portion, 3 is a score line, 4
Is a scar group area, 5 is a score line, 6 and 6'is a half cut,
7 is a die, 10 is an outer layer, 11 is an inner layer, 40 is a piercing hole,
Reference numeral 101 represents a base material layer, and 102 represents an intermediate layer.

FIG. 1 is a plan view showing a first embodiment of a packaging bag according to the present invention, and FIG. 2 is an enlarged plan view of an essential part of FIG. A four-sided seal type packaging bag that is heat-bonded at a portion 2, wherein a cut line 3 is provided in the upper portion (on FIG. 1) parallel to the upper edge at a position a predetermined distance below the upper edge and parallel to the upper edge. A scar group region 4 that is provided and that includes the cut line 3 in the peripheral edge heat-bonding portion 2 and that extends from the outer edge of the peripheral edge heat-bonding portion 2 to the inside and that penetrates the packaging bag through a plurality of fine puncture holes 40. Is provided and the cut line 3 is formed from the outer edge side of the peripheral edge heat-bonded portion 2 to the inner side.
Two cut lines 5 tapering toward each other are provided so that both ends on the outer edge side sandwich the scratch group region 4. Usually, the packaging bag 1 has an upper end edge as an opening, and after filling the contents from the opening, the upper edge is sealed by heat bonding to form a four-sided seal type packaging bag.

FIG. 3 is a sectional view taken along the line XX of FIG. 2, in which the packaging bag 1 is composed of a laminate having a base material layer 101 as an outer layer 10 and a heat-adhesive resin layer as an inner layer 11. Eye lines 3 are provided on the outer layer 10, and fine puncture holes 40 that form the cut lines 5 and the scratch group region 4 are provided through the packaging bag.

FIG. 4 is a view corresponding to FIG. 3 showing a second embodiment of the packaging bag according to the present invention, in which the packaging bag 1'is replaced by the cut line 5 provided in the packaging bag 1 and the outer layer. A half-cut 6 is formed on the outer layer 10 from the 10 side with the inner layer 11 remaining, and is otherwise the same as the packaging bag 1.

FIG. 5 is a view corresponding to FIG. 3 showing a third embodiment of the packaging bag according to the present invention. In the packaging bag 1 ″, the outer layer 10 of the packaging bag 1 ′ is the base layer 101 and the intermediate layer 102. A cut line 3 is provided in the intermediate layer 102, and a half cut 6 ′ is formed in the base layer 102 from the side of the base layer 101 leaving the intermediate layer 102 and the inner layer 11. Other than this, it is the same as the packaging bag 1 '. Although not shown, the half cut 6'is left from the base layer 101 side to the intermediate layer 102 leaving only the inner layer 11. It may be formed to reach, or
The score line 3 may be formed so as to reach the intermediate layer 102 from the side of the base material layer 101 while leaving only the inner layer 11 or may be formed only on the base material layer 101. .

FIG. 6 is a view corresponding to FIG. 2 showing a fourth embodiment of the packaging bag according to the present invention, and FIG. 7 is a view corresponding to FIG. 3 of the fourth embodiment shown in FIG. 1 ″ ′ is formed by embossing a V-shaped pressing die 7 in place of the cut line 5 provided in the packaging bag 1, and is otherwise the same as the packaging bag 1.

As described above, the first to fourth parts shown in FIGS.
By taking one of the packaging bags of the embodiment, the packaging bag can be easily torn and opened with the scar group region 4 as the tear start position, and the score line 5, the half cuts 6, 6 ′, and the pressing die 7 can be used. Since it can be torn along the score line 3 by such guide means, a beautiful opening can be obtained. Further, since any of the above-mentioned guiding means can understand the tearing start position of the packaging bag by touching it with fingers, it can be a packaging bag suitable for a visually handicapped person.

Next, a method of forming the score line 3, the scratch group region 4, the score line 5, the half cuts 6 and 6 ', the stamp 7 and the like will be described. First, as a method of forming the score line 3, the outer layer 1
0 and the inner layer 11 can be formed by cutting the outer layer 10 continuously in the longitudinal direction of the outer layer 10 using a cutting blade such as a leather blade or a cutter blade immediately before the bonding. .

The scratch group region 4 composed of a plurality of fine puncture holes 40 is not particularly limited as long as the width in the direction orthogonal to the cut line 3 is formed so as to include the cut line 3, but is preferable. Is 5 to 10 mm, and the width in the direction parallel to the score line 3 can be an appropriate width from the outer edge of the peripheral edge heat-bonded portion 2 to the vicinity of the inner edge. The plurality of puncture holes 40 provided in the scar group region 4 may be densely provided along the outer edge of the peripheral edge heat-bonding portion 2, and the formation method thereof is preferably puncture with a needle. Further, the shape thereof may be linear, may be angular such as triangular or quadrilateral, may be circular or semicircular, and is more preferably quadrangular pyramid. Is a puncture hole formed by quadrangular pyramid-shaped needle-like protrusions arranged so that the direction connecting the opposite ridge lines is parallel to the cut line 3. The size of the puncture holes is preferably 0.1 to 0.5 mm in diameter, and the interval between adjacent holes is preferably 0.5 to 1.0 mm. The scar group area 4 is provided in the bag making process, and after the peripheral edge heat-bonding portion 2 is formed, the scar group area 4 is formed in a predetermined position by using a piercing tool having needle-shaped projections formed thereon. It is formed by piercing.

Further, the score line 5 and the half cuts 6, 6 '
The formation of the scratches is also performed in the bag making process, and is provided at a predetermined position before or after the formation of the scratch group region 4 by using a cutting blade having a predetermined shape. In addition, it is important that the cut line 5 and the half cuts 6 and 6 ′ be provided so that both end portions on the outer edge side sandwich the scratch group region 4, and the first to the first lines shown in FIGS.
In the third embodiment, an example in which the score line 5 and the half cuts 6 and 6 ′ are provided on the inner edge side of the peripheral edge heat-bonding portion 2 with respect to the scratch group region 4 is shown, but the present invention is not limited to this, and the illustration is omitted. However, the cut line 5 and the half cuts 6 and 6 ′ may be provided so as to overlap the scratch group region 4.

Further, the pressing die 7 is also formed in the bag making process, and the scratch group region 4 is formed by using a die having a predetermined shape, and is then provided at a predetermined position. This stamping die 7 is also the same as the score line 5 and the half cuts 6 and 6 ′, and it is important that both ends on the outer edge side are provided so as to sandwich the scar group region 4, as shown in FIGS. In the fourth embodiment, an example in which the pressing die 7 is provided closer to the inner edge side of the peripheral edge heat-bonding portion 2 than the scratch group area 4 is shown, but the present invention is not limited to this, and although not shown, the pressing die 7 is located in the scratch group area 4. It may be placed on top of each other. The mold provided with the pressing die 7 may be heated if necessary.

The packaging bags of the first to fourth embodiments shown in FIGS. 1 to 6 are representative ones, but are not limited thereto. That is, the packaging bag is not limited to the four-sided seal type, and may be, for example, a three-sided seal type or a standing pouch, and the shape of the scar group region 4, the score line 5, the half cut. Similarly, the shapes of 6, 6 ′ and the pressing die 7 are not limited to this, and in short, all the shapes that do not depart from the gist of the present invention are included in the present invention.

Next, the laminate used for the packaging bag of the present invention will be described. Inner layer 1 of the laminate used for the packaging bag of the present invention
The material constituting 1 may be a layer formed of a heat-adhesive resin that can be melted by heat and welded to each other, and may be appropriately selected and used according to the physical properties required for the packaging bag. Density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, Ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer,
It can be formed of a resin composed of one or more resins such as ethylene-methacrylic acid copolymer.

Further, as the material constituting the base material layer 101 used for the outer layer 10 of the laminate used for the packaging bag of the present invention,
A synthetic resin film having excellent mechanical, physical and chemical properties can be used. For example, a biaxially stretched film made of a polyester-based, polyamide-based or polypropylene-based resin is used. can do. The thickness of the film may be a thickness that allows the strength and rigidity of the base material layer 101 to be kept to the minimum necessary, and may be determined in consideration of cost and the like. Further, the base material layer 101 is usually printed in many cases, and from this point as well, a biaxially stretched film is preferable. Cellophane can be used depending on the physical properties required for the packaging bag.

Further, the outer layer 10 of the laminate used in the packaging bag of the present invention is provided with an intermediate layer 102 as necessary to impart a gas barrier property against oxygen gas, water vapor gas and / or a light shielding property. It may be provided between the base material layer 101 and the inner layer 11. Examples of the material forming the intermediate layer include metal foils such as aluminum, iron, copper and tin, or films such as polyvinyl alcohol, ethylene-vinyl alcohol copolymers and polyvinylidene chloride, or polyesters and polyamides. Polyvinylidene chloride film coated on polyolefin such as polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl alcohol, etc., or vapor deposition of inorganic substances such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide It is possible to use a film that has been subjected to. Further, the intermediate layer 102 not only imparts the above-mentioned gas barrier property and / or light-shielding property, but also has, for example, mechanical toughness, bending resistance, puncture resistance, impact resistance, cold resistance, and heat resistance. Of the above-mentioned gas barrier properties and / or light-shielding properties, such as polyester, polyamide, polyethylene, polypropylene, ethylene-propylene copolymer, etc. It may be used in combination with a film such as polyolefin.

Further, a synthetic resin film used for the base material layer 101 is coated with polyvinylidene chloride, or a vapor deposition layer of an inorganic material such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide or zirconium oxide is formed. In the case of using the above-mentioned material, the intermediate layer 102 for imparting gas barrier property and / or light-shielding property may not be used, but if necessary, for example, mechanical toughness, flex resistance, Puncture resistance, impact resistance, cold resistance,
In order to impart functions such as heat resistance and chemical resistance, for example, one or more films such as polyester, polyamide, or polyolefin such as polyethylene, polypropylene, ethylene-propylene copolymer, etc. are combined to form an intermediate layer. It can be used as 102. As these films, either an unstretched film or a biaxially stretched film can be used.

By the way, as a matter of course, the base material layer 101 used as the outer layer 10 and / or the intermediate layer 10
The cut line 3 is not formed on the film or foil provided to provide the gas barrier property and / or the light shielding property to 2, and the other base material layer 101 and / or
The cut line 3 is formed on the intermediate layer 102.

Next, to specifically exemplify the typical constitution of the laminate used for the packaging bag of the present invention, biaxially stretched polyamide film / adhesive / unstretched polypropylene film, biaxially stretched polyethylene terephthalate film / Adhesive / aluminum foil / adhesive / unstretched polypropylene film, biaxially oriented polyethylene terephthalate film / adhesive / biaxially oriented polyamide film / adhesive / unstretched polypropylene film, biaxially oriented polypropylene film / adhesive / biaxially oriented Polyamide film / adhesive / unstretched polyethylene film, biaxially oriented polypropylene film / adhesive / biaxially oriented polyethylene terephthalate film / adhesive / unstretched polyethylene film, biaxially oriented polyethylene terephthalate film / adhesive / biaxially oriented polya De film / adhesive / aluminum foil / adhesive / unstretched polypropylene film, biaxially stretched polyethylene terephthalate was silicon oxide deposited phthalate film / adhesive / biaxially stretched polyamide film / adhesive /
Examples thereof include unstretched polypropylene film, biaxially stretched polypropylene film / adhesive / ethylene-vinyl alcohol copolymer film / adhesive / unstretched polyethylene film, and a score line is formed in the underlined layer.

The specific structure of the laminate used for the packaging bag described above is a typical structure of the present invention, and the present invention is not limited to this and does not depart from the gist of the present invention. The above configurations are all included in the present invention.

[0030]

As has been described so far, according to the present invention, there is provided a packaging bag having a heat-adhesive resin layer as an inner layer hermetically sealed by the peripheral heat-bonding portion, the outer peripheral edge of the peripheral heat-bonding portion being A linear cut line for opening the packaging bag is provided in at least one layer other than the inner layer, and the peripheral heat-bonded portion includes the cut line and is hung inside from the outer edge of the peripheral heat-bonded portion to form the packaging bag. A scar group region composed of a plurality of fine piercing holes penetrating therethrough is provided, and a double guide means tapering from the outer edge side of the peripheral edge heat-bonded portion toward the inside toward the score line is provided in the peripheral edge heat-bonded portion. By configuring so that both end portions on the outer edge side are provided so as to sandwich the scar group region, the packaging bag can be easily torn and opened by using the scar group region as a tear start position, and the score line is formed by the guide means. along In order to be able to split it can be a packaging bag can be obtained a beautiful opening. Further, by using the guiding means according to any one of claims 2 to 4, since the tearing start position of the packaging bag can be understood by touching it with fingers, the packaging suitable for the visually impaired person as well. It can be a bag. Furthermore, with the packaging bag according to the fifth aspect, the scratch group region of any one of the peripheral edge heat-bonded portions can be set as the tear start position, so that the convenience is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a packaging bag according to the present invention.

FIG. 2 is an enlarged plan view of a main part of FIG.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a view corresponding to FIG. 3 showing a second embodiment of the packaging bag according to the present invention.

FIG. 5 is a view corresponding to FIG. 3 showing a third embodiment of the packaging bag according to the present invention.

FIG. 6 is a view corresponding to FIG. 2 showing a fourth embodiment of the packaging bag according to the present invention.

FIG. 7 is a view corresponding to FIG. 3 of the fourth embodiment shown in FIG.

FIG. 8 is a plan view of a main part of a conventional packaging bag.

[Explanation of symbols]

1,1 ', 1 ", 1"', 81 Packaging bag 2,82 Peripheral heat bonded part 3 score lines 4 Scar group area 5 score line 6,6 'half cut 7 die 10 outer layers 11 inner layer 40 puncture hole 83 Scheduled opening line 84 notch 101 base material layer 102 Middle layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshinari Kokuryo             Kyoto, Ukyo-ku, Uzumasa Shangbu-cho, 10 Dai Nippon             Printing Co., Ltd. (72) Inventor Takahiro Terasaki             Kyoto, Ukyo-ku, Uzumasa Shangbu-cho, 10 Dai Nippon             Printing Co., Ltd. F-term (reference) 3E064 AA03 BA21 BC18 EA30 HP01                       HP02                 3E067 BA12A BB15A BB16A BB25A                       BC03A CA30 EA08 EA09                       EB02 EB22 GD10                 3E086 AC13 AD01 BA04 BA13 BA15                       BA33 BB51

Claims (5)

[Claims] 1. A packaging bag having a heat-adhesive resin layer in an inner layer hermetically sealed by a peripheral heat-bonding portion, wherein a linear cut line for opening the packaging bag from the outer edge of the peripheral heat-bonding portion is the inner layer. Other than at least one layer, including the cut line in the peripheral heat-bonding portion, and a wound group region including a plurality of fine puncture holes penetrating the packaging bag from the outer edge of the peripheral heat-bonding portion to the inside. And two guide means tapering toward the cut line from the outer edge side of the peripheral edge heat-bonded portion to the inner edge of the peripheral edge heat-bonded portion so that both ends of the outer edge side sandwich the scar group area. A packaging bag that is characterized by being. 2. The packaging bag according to claim 1, wherein the guide means is a score line provided through the packaging bag. 3. The packaging bag according to claim 1, wherein the guide means is a half-cut formed from the front side of the packaging bag while leaving at least the heat-adhesive resin layer. 4. The packaging bag according to claim 1, wherein the guide means is a pressing die formed by embossing the packaging bag. 5. The peripheral heat-bonding portion is formed at a position facing each other, and the cut line is formed orthogonal to the peripheral heat-bonding portion. Packaging bag.