JPH09278043A - Easily tearable bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unseal a bag by easily and linearly tearing a specified area of the bag main body by bonding a tape which shows tearability in one direction, in a pore formed area comprising of a large number of fine through holes and/or non-through holes. SOLUTION: A laminated film including a heat-weldable resin film and an organic resin film, is folded in such a manner that the heat-weldable resin film may become the internal side, and a heat-sealed part 32 is formed into a bag-shape to make a bag main body 31. Then, at the top side of the bag main body 31, a band-shaped porous area 35 where non-through holes 34 and through holes mixingly exist, is provided so as to be in parallel with the opening. Then, a tape which shows tearability in one direction, e.g. an adhesive tape 36 with the base of a fabric for which, e.g. a vertical thread and a lateral thread with a smaller tear strength than the vertical thread are woven, is bonded on both surfaces including the porous area 35 in such a manner that the direction to show the tearability may go along the upper edge of the bag main body 31. In addition, a V notch 38 is formed on an extended part 37 of the tape 36, from the left side edge of the bag main body 31.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an easily tearable bag.

[0002]

2. Description of the Related Art A wide variety of liquid or powder products such as liquid soup, powder soup, and powdered medicine are individually packaged in a bag made of a composite film or a laminated film based on an organic resin film and hermetically stored. Used in. When opening these bags, the contents need to be easily torn without spilling or scattering.

Under the circumstances described above, bags having the following easy-tearability have been conventionally developed. (1) A seal portion may be formed at a position away from the outer edge of the film, a non-adhesive outer edge portion of the film may be left on the outer side thereof, and a V notch may be formed at that portion, and the V notch may be used as a starting point to tear the film. Possible bags.

(2) A seal portion of the three-layer film is formed at a position distant from the outer edge of the film, a non-adhesive film outer edge portion is left outside, and a V notch is formed at that portion.
In addition, a bag having a number of slits formed on the extension line of the V notch on the front side film and capable of being torn in the slit forming direction from the V notch as a starting point (Shokai Sho 61-
66137).

(3) The seal portions on both sides are formed at positions apart from the outer edge of the film, and the non-adhesive outer edge portion of the film is left on the outer side thereof, and a scratch group having a large number of band-like scars is formed on the outer edge portion of the film. An easily openable bag that can be torn from any position on the outer periphery of the film (Japanese Utility Model Laid-Open No. 5-178352).

The above-mentioned bags (1) to (3) have a good heat-sealing property because they are formed into a bag shape, but a heat-fusible resin such as a polyethylene film having a property of being difficult to tear in both length and width. Is inevitably used as a base film. For this reason, in the bag of (1) in which the V notch is formed, the contents are not torn in a region defined from the V notch, for example, in a direction parallel to the opening of the bag, but are torn in an unexpected diagonal direction and the contents pop out. There was a problem. In particular, a bag using a nylon film in which the outermost layer is oriented and crossed has a high frequency of being torn in an unexpected diagonal direction, and the contents pop out.

Further, although the bag of (2) in which the V notch and the slit are formed is easier to tear than the bag of (1), a large number of slits are formed in the film on the front side of the multilayer film. The cost of the bag is high because it requires complicated operations.

Further, the bag of (3), in which the non-adhesive film has a plurality of band-shaped scars formed on the outer periphery thereof, can be torn from any place, but the scratches have V notches. Similarly, there is a problem that the content is popped out by being torn in an unexpected diagonal direction during opening because it merely serves as a starting point of tearing.

On the other hand, since the gusset type bag has self-supporting property, it is suitable for containing, for example, liquid soup or liquid detergent. Such a bag is a laminated film of a heat-fusible resin film such as a polyethylene film and an organic resin film having rigidity such as a nylon film, and is laminated such that the heat-fusible resin film is located inside. The heat-fusible resin films are heat-sealed to each other and cut into a desired size, which has a structure shown in FIG. That is, the bag 1 has a heat-sealing portion 2 formed on the periphery thereof.
And a gusset portion 3 formed on the bottom portion and an elongated pouring portion 4 formed on the upper corner portion and having a closed tip.
A liquid injection part is opened at a part of the side on the side of the pouring part 4, and is heat-sealed after the liquid 5 is injected.

In order to make the above-mentioned bag into a bag shape, a heat-fusible resin film such as a polyethylene film having a good heat-sealing property is inevitably used as a base material. However, the heat-fusible resin film has a property that it is hard to tear in both the vertical and horizontal directions, and particularly has a property that it is hard to tear in an oblique direction. For this reason, the bag cannot be opened by obliquely tearing it with a finger so as to cross the sealed elongated pouring portion 4 of the bag 1 shown in FIG. In particular, the gazette-type bag is almost impossible to tear with fingers because the bag is thick as a whole. Therefore, in order to open the gusset type bag 1 as shown in FIG. 14, it is necessary to cut the bag 1 using the scissors 6 so as to cut across the elongated pouring portion 4 of the bag 1, and the opening operation is troublesome. There was a problem.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide an easily tearable bag which can be easily and linearly torn to open a defined region of the bag body. The present invention provides an easily tearable bag that can be easily and linearly torn and opened at an upper corner portion of a bag body having a gusset portion for storing a liquid content such as a liquid detergent. It is the one we are trying to provide.

[0012]

In the easily tearable bag according to the present invention, a laminated film including a heat-fusible resin film and an organic resin film having rigidity is provided on the inner surface side of the heat-fusible resin film. Body formed by stacking and heat-sealing in a bag shape; a hole forming region including a large number of fine through holes and / or non-through holes provided in the opened portion of the bag body; tearing in one direction A tape exhibiting tearability, which is adhered to both surface portions of the bag body including the hole forming region such that the tearability direction is along the unsealing direction;
And a notch formed in at least one end of the tape along a direction in which the tape exhibits tearability.

Another easily tearable bag according to the present invention is a bag in which a laminated film obtained by laminating a heat-fusible resin film and an organic resin film having rigidity is laminated so that the heat-fusible resin film is inside. A bag body having a gusset portion at the bottom, which is produced by heat-sealing in a circular shape; a hole forming region including a large number of fine through holes and / or non-through holes provided in a corner portion on the upper side of the bag body; A tape exhibiting tearability in one direction, which is adhered to both sides of a corner portion of the bag body including the hole forming region so that the direction showing the tearability is along an oblique direction crossing an upper side and a side edge of the bag body. And a notch formed in at least one end of the tape along a direction in which the tape exhibits tearability.

Still another easily tearable bag according to the present invention is a laminated film obtained by laminating a heat-fusible resin film and an organic resin film having rigidity, so that the heat-fusible resin film faces inside. A bag body produced by heat-sealing in a bag shape, having an elongated liquid spouting part sealed in an upper corner part and a gusset part at the bottom; the liquid spouting part on the upper side of the bag body A hole forming region formed of a large number of fine through holes and / or non-through holes provided in a corner portion including a portion; a tape exhibiting unidirectional tearability, the corner including the hole forming region of the bag body Adhered on both sides of the tape so that the direction of its tearability is along an oblique direction that crosses the upper side and the side of the bag body; and a cut formed on at least one end of the tape along the direction of its tearability. Part It is characterized in that comprises a.

Yet another easily tearable bag according to the present invention is a laminated film in which a heat-fusible resin film and an organic resin film having rigidity are laminated so that the heat-fusible resin film faces inside. A bag body produced by heat-sealing in a bag shape, having an elongated liquid spouting part sealed in an upper corner part, a gusset part in the bottom part, and a tip having a cavity in the liquid spouting part. An organic resin pipe inserted so as to remain as a part; a hole formed of a large number of fine through holes and / or non-through holes provided in a corner portion including the remaining cavity on the upper side of the bag body. region;
A tape that is tearable in one direction, and is adhered to both sides of a corner portion of the bag body including the hole forming region so that the direction of the tearability is along an oblique direction that crosses the upper side and the side of the bag body. And a notch formed in at least one end of the tape along the direction of its tearability.
It is characterized by having.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The easily tearable bag according to the present invention will be described in detail below. The bag body is a laminated film including a heat-fusible resin film and an organic resin film having rigidity, which are stacked so that the heat-fusible resin film is located on the inner surface side.
It is produced by heat-sealing in a bag shape. The opening portion of the bag body is provided with a hole forming region formed by forming a large number of fine through holes and / or non-through holes. The tape which is tearable in one direction is adhered to both surface portions of the bag body including the hole forming region such that the direction of tearability is along the unsealing direction. At least one end of the tape is formed with a notch such as a V notch along a direction in which the tape is tearable.

The laminated film comprises, for example, a heat-fusible resin film and an organic resin film having rigidity, a heat-fusible resin film, an aluminum thin film and an organic resin film having rigidity are laminated in this order. Etc. can be used.

Examples of the heat-fusible resin include low density polyethylene, polyethylene such as linear low density polyethylene, ethyl vinyl acetate copolymer (EVA) and unstretched polypropylene.

Examples of the organic resin having rigidity include polyethylene terephthalate (PET) and nylon. The pore forming region can be formed using, for example, the porous film manufacturing apparatus of Japanese Patent Application No. 5-258637 filed by the present applicant.

That is, the porous film manufacturing apparatus is provided with a supply means for supplying a long film (a long processed film in which a plurality of bag main bodies [unsealed bag main bodies] are formed); sharp corners. Having a Mohs hardness of 5 or more and having a large number of particles attached to the surface thereof, a second block having a desired convex pattern formed on the surface, and at least a convex pattern forming surface of the second block. And an organic polymer sheet having elasticity, the particle adhesion surfaces of the first and second blocks and the organic polymer sheet are opposed to each other, and the long film is passed between them. And at least one of the first and second blocks is fixed, and the other is movably arranged toward the one block. A driving means for moving the distance between the surface of the sheet portion corresponding to the convex pattern and the tip of the particle toward the fixed block to be smaller than the thickness of the long film; .

The through holes and / or the non-through holes preferably have an average opening diameter of 0.5 to 100 μm and a density of 500 holes / cm ² or more in the hole forming region. The average opening diameter of the through-holes and / or non-through-holes is defined because if the average opening diameter deviates from the above range, it is difficult to linearly and easily tear the specified bag body portion when opening the bag. become. A more preferred average opening diameter is 5 to 80 μm.

The density of the through holes and / or the non-through holes in the hole forming area is defined for the following reason. When the density of the through holes and / or the non-through holes is less than 500 pieces / cm ² , it becomes difficult to easily linearly tear the specified bag body portion when opening the bag. Regarding the upper limit of the density of the through holes and / or the non-through holes, when the above-mentioned porous film manufacturing apparatus is used, it is 25,000 holes / cm ² per treatment.
become.

The shape of the unsealed portion is not particularly limited,
For example, annular, square, hexagonal, etc., strip,
It may have any shape such as a V shape. The tape is, for example, a uniaxially stretched polypropylene film, an adhesive tape using a uniaxially stretched organic resin such as a uniaxially stretched polyethylene terephthalate film as a base film, and a woven fabric in which warp yarns and weft yarns having different tear strengths are woven. An adhesive tape or the like can be used. As the adhesive tape based on the woven cloth, for example, a product name manufactured by Diatex Co .; Piolan tape, a product name manufactured by Furukawa Electric Co., Ltd .; a cloth adhesive tape, a product name manufactured by Okamoto Co., Ltd., a void tape or the like can be used. .

One end of the tape may extend from the bag body, or the tape may be positioned at an edge portion (seal portion) of the bag body. However, in order to improve tearability, it is preferable that the notch formed at one end of the tape is formed not only over the tape but also over the seal of the bag body.

The easily tearable bag according to the present invention can be applied to those having a gusset portion (a) to (c) described below. (A) The bag body is produced by stacking a laminated film in which a heat-fusible resin film and an organic resin film having rigidity are laminated so that the heat-fusible resin film is on the inside, and heat-sealing in a bag shape. And has a gusset portion at the bottom. The corner portion on the upper side of the bag body is provided with a hole forming region formed by forming a large number of fine through holes and / or non-through holes. A tape exhibiting tearability in one direction is adhered to both sides of the corner portion including the hole forming region of the bag body such that the direction indicating the tearability is along an oblique direction crossing the upper side and the side edge of the bag body. There is. At least one end of the tape is formed with a notch such as a V notch along a direction in which the tape is tearable.

(B) In the bag body, a laminated film obtained by laminating a heat-fusible resin film and an organic resin film having rigidity is laminated so that the heat-fusible resin film is on the inside, and heat-sealed in a bag shape. It has an elongated liquid pouring part which is manufactured by the above method and is sealed in the upper corner part, and has a gusset part in the bottom part. The corner portion including the liquid pouring portion on the upper side of the bag body is provided with a hole forming region formed by forming a large number of fine through holes and / or non-through holes. A tape exhibiting tearability in one direction is adhered to both sides of the corner portion including the hole forming region of the bag body such that the direction indicating the tearability is along an oblique direction crossing the upper side and the side edge of the bag body. There is. At least one end of the tape is formed with a notch such as a V notch along a direction in which the tape is tearable.

(C) In the bag body, a laminated film obtained by laminating a heat-fusible resin film and a rigid organic resin film is laminated so that the heat-fusible resin film is on the inside, and heat-sealed in a bag shape. It is made by The bag body has an elongated liquid spouting part sealed in an upper corner part, a gusset part at the bottom part, and an organic resin inserted into the liquid spouting part so that the tip remains as a hollow part. Has a pipe. A hole forming region formed by forming a large number of fine through holes and / or non-through holes is provided in the corner portion including the residual cavity on the upper side of the bag body. A tape exhibiting tearability in one direction is adhered to both sides of the corner portion including the hole forming region of the bag body such that the direction indicating the tearability is along an oblique direction crossing the upper side and the side edge of the bag body. There is. At least one end of the tape is formed with a notch such as a V notch along a direction in which the tape is tearable.

Examples of the heat-fusible resin include low density polyethylene, polyethylene such as linear low density polyethylene, ethyl vinyl acetate copolymer (EVA) and unstretched polypropylene.

Examples of the organic resin having rigidity include polyethylene terephthalate (PET) and nylon. The hole forming region can be formed, for example, by using the easily tearable imparting device of Japanese Patent Application No. 8-14329 filed by the present applicant.

That is, the easily tearable production apparatus has a first perforated portion in the surface region, and the first perforated portion adheres a large number of particles having a Mohs hardness of 5 or more having sharp corners to the surface region. A lower block formed by: and a second perforation part disposed above the lower block and facing the first perforation part, the second perforation part having a sharp corner in the surface region. Block having a Mohs hardness of 5 or more having a portion and an upper block formed by adhering a large number of particles having a Mohs hardness of 5 or more; Is moved to a position smaller than the thickness of the processed film (long processed film in which a plurality of bag main bodies [unsealed bag main bodies] are formed) supplied on the lower block, whereby the processed film Having the structure and a driving means by press-fitting the sharp corners of the large number of particles on both sides of the corner portions of the formed the bag body to form a large number of blind pores.

The through holes and / or the non-through holes have an average opening diameter of 0.5 to 10 for the same reason as described above.
It is preferably 0 μm and has a density of 500 holes / cm ² or more in the hole forming region.

The tape is, for example, a uniaxially stretched polypropylene film, an adhesive tape based on a uniaxially stretched organic resin such as a uniaxially stretched polyethylene terephthalate film, and a woven fabric in which warp threads and weft threads having different tear strengths are woven. An adhesive tape or the like based on can be used. As the adhesive tape based on the woven cloth, for example, a product name manufactured by Diatex Co .; Piolan tape, a product name manufactured by Furukawa Electric Co., Ltd .; a cloth adhesive tape, a product name manufactured by Okamoto Co., Ltd., a void tape or the like can be used. .

One end of the tape may extend from the bag body or may be located at an edge (sealing portion) of the bag body. However, since the tape is adhered to the corner portion of the bag main body and the area when it is torn by a finger becomes small, it is preferable that one end thereof extends outside the bag main body to increase the area. Further, in order to improve tearability, it is preferable that the notch formed at one end of the tape is formed not only in the tape but also in the seal of the bag body.

The easily tearable bag according to the present invention described above is
Laminated film including a heat-fusible resin film and an organic resin film having rigidity is laminated such that the heat-fusible resin film is located on the inner surface side, and a bag body produced by heat-sealing in a bag shape, A hole forming region consisting of a large number of minute through holes and / or non-through holes provided in the opened part of the bag body, and tearability in one direction, and on both surface parts including the hole forming region of the bag body. A tape adhered so that the direction showing its tearability is along the opening direction,
At least one end of the tape is provided with a notch formed along the direction of tearability. Such an easily tearable bag can be linearly and easily torn along the direction in which the tape has tearability to be opened.

That is, the tape adhering portion of the bag body is held by the fingers of one hand, and the other finger is used to make a notch at one end of the tape (for example, a notch formed at a portion where one end of the tape extends). Part) between the holding position of one finger and the tape sticking part on the opposite side, and pulling along the direction of the cut part, the cut formed in the direction in which the tape tears. The part acts as the starting point of tearing and is torn. In the process of tearing the tape, since the bag main body having the tape adhered to both sides thereof has a plurality of fine through holes and / or hole forming regions formed of non-through holes, these through holes and / or Alternatively, the non-through holes sequentially act as tear points. As a result, even if a heat-fusible resin film such as a polyethylene film having a property of being difficult to tear in both the vertical and horizontal directions is used as the material of the bag body, a tear guide action of the tape exhibiting tearability in one direction and this tape. By the action as a tear point in the hole forming area attached to both surfaces, the tape can be torn extremely easily along the direction in which the tape is tearable, that is, linearly without applying an excessive force.

In particular, an adhesive tape based on a woven fabric in which warp yarns and weft yarns having different tear strengths are knitted as a tape exhibiting tearability in one direction (for example, warp yarns having large tear strength and weft yarns having small tear strength are knitted). Adhesive tape based on woven cloth) is used to tear the weak weft yarn between two warp yarns in the tearing process of this tape while sequentially cutting, so that the tear guide action can be further enhanced and the tearing The linearity can be improved.

In a bag having a structure in which only the hole forming region is provided in the unsealed portion of the bag body and a tape which is tearable in one direction is not attached to the hole forming region, a plurality of holes penetrating the hole forming region are provided. The holes and / or the non-penetrated holes may act as tear points in sequence and are torn, but there is no tape acting as a tear guide that determines the direction of the tear, so there is a risk of tearing in an unexpected direction.

Further, even in a bag having a structure in which the hole forming region is provided in the opening portion of the bag body and the tape which is tearable in one direction is not adhered to only one surface of the hole forming region, the tape having only one surface is adhered. The garment does not sufficiently act as a tear guide that determines the direction of tearing, and therefore the bag body may be torn in an unexpected direction.

Therefore, the easily tearable bag according to the present invention is easily and linearly torn in a direction in which the tape having unidirectional tearability is adhered, so that, for example, in an unexpected direction. It is possible to prevent the contents from spilling or scattering due to being torn.

Further, since the hole forming region of the bag body is covered with the above-mentioned tape, the gas barrier property of the bag body can be ensured even if the through hole exists in the hole forming region, and the contents are accommodated. It is possible to prevent an object, especially a liquid content, from leaking to the outside.

The easily tearable film of the present invention having such an easily tearable bag can be used in a wide variety of liquids such as liquid soup, powdered soup, granulated sugar, instant coffee containing sugar and powdered cream in advance, powdered medicines and the like. It can be effectively used for individual packaging of powdered products.

Further, the easily tearable bag having the gusset portion at the bottom of (a) to (c) described above is formed with a large number of fine through holes and / or non-through holes in the corner portion on the upper side thereof. An area is provided, and a tape exhibiting tearability in one direction is adhered to both sides of the corner portion including the hole forming area so that the direction exhibiting the tearability is along an oblique direction across the upper side and the side edge of the bag body. Since at least one end of the tape is formed with a notch such as a V-notch along the direction in which the tape is tearable, the tear guide action of the tape that is tearable in one direction and the tape is double-sided. Without using scissors or the like on the corner portion of the bag body by acting as a tear point in the hole forming region attached to
It can be easily torn and linearly torn in a diagonal direction to open.

[0043]

Embodiments of the present invention will now be described in detail with reference to the drawings. (Example 1) FIG. 1 is a plan view showing an easily tearable unsealed bag of Example 1, FIG. 2 is a plan view of an unsealed bag before tape attachment in FIG. 1, and FIG. 3 is tape attachment in FIG. It is sectional drawing of an attachment part.

The unsealed bag body 11 is composed of a laminated film of a polyethylene film 12 having a thickness of 60 μm and a nylon film 13 having a thickness of 15 μm, and has a heat-sealing portion 14 formed on the periphery and a liquid injection formed on the upper portion. Part 15
And a gusset portion 16 formed on the bottom. In addition, if it is left as an opening in the upper portion of the bag body 11 located at a tape attaching portion to be described later, heat sealing cannot be performed, and as a result, sealing becomes difficult. The heat seal portion 14 is formed on the upper portion. The bag body has a long laminated film made of a nylon film and a polyethylene film, and a plurality of folded portions serving as gusset portions are formed along the length direction of the bag so that the polyethylene film is located inside. After being folded in two along the length direction, the both ends along the length direction are heat-sealed to form a tubular long film having a front end and a rear end opened, and the long film is heat-sealed. It is produced by

At the upper corner of the bag body 11,
As shown in FIGS. 2 and 3, the average opening diameter is 5 from both sides.
Triangular hole forming region 18 formed by forming 0 μm non-through holes 17 at a density of 1000 holes / cm ^2.
Is provided. Through holes are mixed in the hole forming region 18. The hole forming region 18 was formed using, for example, the easily tearing device of Japanese Patent Application No. 8-14329 filed by the present applicant. A tape exhibiting tearability in one direction, for example, an adhesive tape (a product name by Okamoto; void tape) 19 based on a woven fabric in which a warp yarn and a weft yarn having a tear strength smaller than that of the warp yarn are knitted is the bag body 11
The both sides of the corner portion including the hole forming region 18 are adhered so that the direction indicating the tearability (the warp direction) is along the diagonal direction crossing the upper side and the side side of the bag body 11. One end of the tape 19 extends in a triangular shape from the upper side of the bag body 11. The V notch 21 is formed from the triangular-shaped extending portion 20 of the tape 19 to the tape 19 portion including a part of the hole forming region 18 along a direction in which the tape 19 exhibits tearability. There is.

For example, a liquid detergent is injected into the unsealed bag body 11 through the liquid injecting portion 15 and heat-sealed to produce a gusset type sealed bag 23 containing the liquid detergent 22 as shown in FIG. To be done. In the sealed bag 23 having such a structure, as shown in FIG. 4, the vicinity of the tape 19 of the bag 23 is grasped by the fingers of one hand 24, and the V of one end of the tape 19 is grasped by the fingers of the other hand 25. When the notch 21 is sandwiched and the tape 19 attachment portion on the opposite side of the holding position of the one finger 24 is grasped and pulled along the direction of the V notch 21, the tape 19 is formed in a direction showing tearability. The V notch 21 acts as a starting point of tearing and is torn. In the process of tearing the tape 19 as described above, since the bag 23 to which the tape 19 is attached on both sides has the hole forming region 18 made up of many fine non-through holes 17, the non-through holes 17 are sequentially formed. Acts as a tear point. As a result, even if a polyethylene film having a property of being difficult to tear in both the vertical and horizontal directions is used as the material of the bag 23, the tear guide action of the tape 19 which is tearable in one direction and the tape 19 is adhered to both sides. Due to the action as a tear point in the hole forming region 18, the tape can be torn extremely easily along the direction (oblique direction) in which the tape is tearable. Therefore, the sealed bag 23
When opening to pour out the liquid detergent 22 in the inside, the tape 19 attached to the hole forming area 18 of the corner portion is manually used as shown in FIG. 5 without using scissors as in the conventional case. Since it can be easily torn and opened, the opening operation can be significantly simplified.

Example 2 FIG. 6 is a plan view showing an easily tearable unsealed bag of Example 2. The unsealed bag body 31 is composed of a laminated film of a polyethylene terephthalate film having a thickness of 12 μm, a polyethylene film having a thickness of 20 μm, an aluminum foil having a thickness of 9 μm, and an unstretched polypropylene film having a thickness of 60 μm, and is formed on a peripheral edge thereof. It is composed of a seal part 32 and an injection part 33 formed on the upper part.

On the upper side of the bag body 31, there is formed a band-shaped hole forming region 35 formed by forming non-through holes 34 having an average opening diameter of 70 μm at a density of 500 holes / cm ^2. It is provided so as to be parallel to. In addition,
Through holes are mixed in the hole forming region 35. The hole forming region 35 was formed using, for example, the porous film manufacturing apparatus of Japanese Patent Application No. 5-258637 filed by the present applicant. A tape exhibiting unidirectional tearability, for example, an adhesive tape (Okamoto brand name: void tape) 36 based on a woven fabric in which a warp yarn and a weft yarn having a tear strength smaller than that of the warp yarn are knitted is The both sides including the hole forming region 35 are adhered so that the direction in which the tearability is exhibited (the warp direction) is along the upper side of the bag body 11. The left end of the tape 36 extends from the side of the bag body 31. The V notch 38 is formed on the tape 3
6 extending from the extending portion 37 to the portion of the tape 36 including a part of the hole forming region 35 along the direction in which the tape 36 exhibits tearability.

The injection part 3 is provided in the unsealed bag body 31.
For example, a snack candy (not shown) is put through 3 and heat-sealed to produce a sealed bag 39 containing the snack candy as shown in FIG. 7. In the sealed bag 39 having such a structure, as shown in FIG. 7, the vicinity of the tape 36 of the bag 39 is grasped by the fingers of one hand (not shown), and the other hand (not shown) is held. When the V notch 38 at one end of the tape 36 is sandwiched by a finger and the tape 36 attachment position on the opposite side of the holding position of one finger is grasped and pulled along the direction of the V notch 38, the tape 36 tears. The V notch 38 formed in the direction indicated by is torn as it acts as a starting point of tearing. In such a tearing process of the tape 36, since the bag 39 having the tape 36 adhered on both sides thereof has the hole forming region 35 composed of many fine non-through holes 34, the non-through holes 34 are sequentially formed. Acts as a tear point. As a result, even if an unstretched polypropylene film having a property of being difficult to tear in both the vertical and horizontal directions is used as the material of the bag 39, the tear guide action of the tape 36 which is tearable in one direction and the tape 36 is stuck on both sides. Due to the action as a tear point in the attached hole forming region 35, the tape 36 can be torn very easily along the direction in which the tape 36 exhibits tearability (the direction parallel to the upper side). Accordingly, when opening the snack confectionery in the sealed bag 39 for taking out the snack, the tape 36 can be easily and linearly torn in the direction in which the tape 36 is adhered in a direction exhibiting the tearability thereof, so that the unexpected direction ( (Diagonal direction)
It is possible to prevent spilling or scattering of snacks caused by being torn into pieces.

(Embodiment 3) FIG. 8 is a plan view showing an easily tearable unsealed bag of Embodiment 3. The unsealed bag body 41 includes a polyethylene film having a thickness of 60 μm and a thickness of 15 μm.
And a heat-sealing portion 42 formed on the peripheral edge, a gusset portion 43 formed on the bottom portion, and an elongated pouring portion 44 formed on the upper corner portion and having a sealed tip. , A liquid injecting section 45 opened at a part of the side on the pouring section 44 side.

At the upper corner of the bag body 41,
From both sides, 10 through holes 46 with an average opening diameter of 40 μm
A triangular hole forming region 47 formed by forming holes at a density of 00 holes / cm ² is provided. It should be noted that through holes are mixed in the hole forming region 47. The hole forming region 18 was formed using, for example, the easily tearing device of Japanese Patent Application No. 8-14329 filed by the present applicant.
A tape exhibiting unidirectional tearability, for example, an adhesive tape (trade name: void tape) manufactured by Okamoto Co., Ltd. 48 based on a woven fabric in which a warp yarn and a weft yarn having a tear strength smaller than that of the warp yarn are knitted is The direction in which the tearing property (the warp direction) is adhered to both sides of the corner portion including the hole forming region 47 is along the diagonal direction crossing the upper side and the side side of the bag body 41. One end of the tape 48 extends in a triangular shape from the upper side of the bag body 41. The V notch 50 is formed from the triangular extension 49 of the tape 48 to a portion of the tape 48 including a part of the hole forming region 47 along a direction in which the tape 48 exhibits tearability. There is.

For example, a liquid detergent is injected into the unsealed bag main body 41 through the liquid injecting portion 45 and heat-sealed to form a gusset-type seal containing a liquid detergent (not shown) as shown in FIG. The bag 51 is produced. In the sealed bag 51 having such a structure, as shown in FIG. 9, a finger of one hand (not shown) is used to grasp the vicinity of the tape 48 attachment portion of the bag 51 and the other hand (not shown) is held. Tape 4 with your fingers
8 When the V notch 50 at one end is sandwiched and the tape 48 attachment position on the opposite side of the holding position of one finger is grasped and pulled along the direction of the V notch 50, the same behavior as in the above-described Example 1 is obtained. The V notch 50 acts as a starting point of tearing and is torn, and further, the tearing guide action of the tape 48 and the action as a tearing point in the hole forming region 47 in which the tape 48 is adhered to both sides of the tape 48. It is possible to tear very easily along the direction (oblique direction) in which the tearability of (1) is shown. Accordingly, when the liquid detergent (not shown) in the sealed bag 51 is opened to be poured out, scissors unlike the conventional case is used.
Since the tape 48 adhered to the hole forming region 47 of the corner portion can be easily torn and opened by hand as shown in FIG.
The opening operation can be significantly simplified.

(Embodiment 4) FIG. 11 is a plan view showing an easily tearable unsealed bag of Embodiment 4. The unsealed bag body 61 is
It is composed of a laminated film of an unstretched polypropylene film having a thickness of 60 μm and a nylon film having a thickness of 15 μm, and has a heat-sealing portion 62 formed on the periphery, a gusset portion 63 formed on the bottom portion, and a corner portion on the upper portion, and a tip end. An elongated liquid pouring portion 64 in which the liquid is sealed, and the pouring portion 6
It is composed of a liquid injection part 65 opened at a part of the side on the fourth side and a polyethylene pipe 67 inserted into the liquid injection part 64 so that the tip remains as a cavity 66.

The corner portion including the remaining cavity portion 66 on the upper side of the bag body 61 has an average opening diameter of 70 from both sides.
A triangular hole forming region 69 is formed by forming unperforated holes 68 of μm at a density of 500 holes / cm ² . It should be noted that through holes are mixed in the hole forming region 69. The hole forming region 69 was formed using, for example, the easily tearing device of Japanese Patent Application No. 8-14329 filed by the present applicant. A tape exhibiting unidirectional tearability, such as a warp yarn and a woven fabric woven with a weft yarn having a tear strength smaller than this warp yarn (Okamoto brand name: void tape) 70 is the bag body 61.
The both sides of the corner portion including the hole forming region 69 are adhered so that the direction in which the tearability is exhibited (the warp direction) is along the diagonal direction crossing the upper side and the side side of the bag body 61. One end of the tape 70 extends in a triangular shape from the upper side of the bag body 61. The V notch 72 is formed along the direction in which the tape 70 has a tear property from the triangular extension 71 of the tape 70 to the tape 70 portion including a part of the hole forming region 69. There is.

For example, a liquid detergent is injected into the unsealed bag body 61 through the liquid injecting portion 65, and heat sealed to form a gusset-type seal containing a liquid detergent (not shown) as shown in FIG. The bag 73 is produced. In the sealed bag 73 having such a structure, as shown in FIG. 12, a finger of one hand (not shown) grips the vicinity of the tape 70 sticking portion of the bag 73, and the other hand (not shown) holds it. The V notch 7 at the end opposite to the holding position of one finger is grasped by sandwiching the V notch 72 at one end of the tape 70 with a finger and the V notch 7
When pulled along the direction of 2, the V notch 72 acts as a starting point of tearing and is torn due to the same behavior as in the above-described first embodiment, and further, the tear guide action of the tape 70 and the tape 70 on both sides. By the action as a tear point in the attached hole forming area 69, the tape 70 can be torn extremely easily along the direction (oblique direction) showing the tearability. Therefore, the liquid detergent (not shown) in the sealed bag 73 is removed from the liquid outlet 6
When the pipe 67 inserted in the No. 4 is opened for pushing and pouring, without using scissors as in the conventional case, FIG.
As shown in FIG. 3, the tape 70 adhered to the hole forming region 69 of the corner can be easily torn and opened by hand, so that the unsealing operation can be remarkably simplified.

[0056]

As described above in detail, according to the present invention, the opening portion can be easily and linearly torn without impairing the gas barrier property and the liquid tightness of the defined region (opening portion) of the bag body. Can be opened, liquid soup, powdered soup,
It is possible to provide an easily tearable bag that is effective for individual packaging of a wide variety of liquid or powder products such as granulated sugar, instant coffee containing sugar and powder cream in advance, and pharmaceutical products in powder form.

Further, according to the present invention, the corner portion on the upper side of the bag body having the gusset portion for accommodating the liquid contents such as the liquid detergent can be easily and linearly torn and opened. Further, it is possible to provide an easily tearable bag capable of maintaining the gas barrier property and the liquid tightness of the opening portion.

[Brief description of drawings]

FIG. 1 is a plan view showing an easily tearable unsealed bag of Example 1. FIG.

FIG. 2 is a plan view showing an unsealed bag before the tape is attached in FIG.

FIG. 3 is a sectional view of the tape adhering portion of FIG.

FIG. 4 is a perspective view showing an opening process of the sealed bag after the liquid detergent is stored in the unsealed bag of FIG.

5 is a perspective view showing a state in which a sealed bag containing a liquid detergent is opened in the unsealed bag shown in FIG.

FIG. 6 is a plan view showing an easily tearable unsealed bag of Example 2.

FIG. 7 is a plan view showing an opening process of the sealed bag after the snacks are stored in the unsealed bag of FIG. 6 and sealed.

FIG. 8 is a plan view showing an easily tearable unsealed bag of Example 3.

9 is a plan view showing an opening process of the sealed bag after the liquid detergent is stored in the unsealed bag of FIG.

10 is a plan view showing a state in which a sealed bag containing a liquid detergent is opened in the unsealed bag shown in FIG.

FIG. 11 is a plan view showing an easily tearable unsealed bag of Example 4.

12 is a plan view showing an opening process of the sealed bag after the liquid detergent is stored in the unsealed bag of FIG.

13 is a plan view showing a state in which a sealed bag containing a liquid detergent is opened in the unsealed bag shown in FIG.

FIG. 14 is a perspective view showing an opening process of a conventional sealed bag containing a liquid detergent.

[Explanation of symbols]

 11, 31, 41, 51 ... Easy-tear unsealed bag, 14, 32, 42, 62 ... Heat seal part, 16, 43, 63 ... Gazette part, 17, 34, 46, 68 ... Unpenetrated hole, 18, 35, 47, 69 ... Hole forming region, 19, 36, 48, 70 ... Tape, 21, 38, 50, 72 ... V notch, 23, 39, 51, 73 ... Sealing bag.

Claims (12)

[Claims] 1. A laminate film comprising a heat-fusible resin film and an organic resin film having rigidity is laminated so that the heat-fusible resin film is located on the inner surface side, and heat-sealed in a bag shape. A bag body; a hole-forming region consisting of a large number of minute through holes and / or non-through holes provided in an opened portion of the bag body; a tape that is unidirectionally tearable, the hole of the bag body And a notch formed on at least one end of the tape along the tearing direction on both sides including the forming region so that the tearing direction is along the unsealing direction. An easily tearable bag characterized by that. 2. The easily tearable bag according to claim 1, wherein the laminated film is formed by laminating an organic resin film having rigidity, an aluminum thin film, and a heat-fusible resin film in this order. . 3. The hole forming region has an average opening diameter of 0.5.
500 to 100 μm through-holes and / or non-through-holes
The easily tearable bag according to claim 1, wherein the easily tearable bag is formed by perforating the opened portion of the bag body at a density of at least pieces / cm ² . 4. The easily tearable bag according to claim 1, wherein the tape is an adhesive tape based on a uniaxially stretched organic resin film. 5. The easily tearable bag according to claim 1, wherein the tape is an adhesive tape based on a woven fabric in which warp yarns and weft yarns having different tear strengths are woven. 6. A laminate film obtained by laminating a heat-fusible resin film and an organic resin film having rigidity, is laminated so that the heat-fusible resin film is on the inside, and is heat-sealed in a bag shape. A bag body having a gusset portion at the bottom; a hole forming region formed of a large number of fine through holes and / or non-through holes provided in a corner portion on the upper side of the bag body; And is adhered to both sides of the corner portion of the bag body including the hole forming region so that the direction of tearability thereof extends along an oblique direction across the upper side and the side of the bag body; and at least one end of the tape. An easily tearable bag, comprising: a notch formed along the direction of exhibiting the tearability. 7. A laminate film obtained by laminating a heat-fusible resin film and an organic resin film having rigidity is laminated so that the heat-fusible resin film is on the inside, and heat-sealed in a bag shape. The bag body has an elongated liquid spouting portion sealed in an upper corner portion and a gusset portion at the bottom; a large number of corners including the liquid spouting portion on the upper side of the bag body are provided. Fine through holes and /
Or a hole forming region consisting of a non-through hole; a tape which is tearable in one direction, and the direction in which the tearing property is present on both sides of the corner portion of the bag body including the hole forming region is the upper side and the side of the bag body. An easily tearable bag, comprising: a tape that is adhered along an oblique direction that crosses a side; and a cut portion that is formed along at least one end of the tape along a direction in which the tape shows tearability. 8. A laminate film obtained by laminating a heat-fusible resin film and an organic resin film having rigidity is laminated so that the heat-fusible resin film is on the inside, and heat-sealed in a bag shape. A bag body, made of an organic resin, which has an elongated liquid spouting part sealed in an upper corner part and a gusset part in the bottom part, and is inserted into the liquid spouting part so that the tip remains as a hollow part. A pipe; a hole forming region made up of a large number of fine through holes and / or non-through holes provided in a corner portion including the residual cavity on the upper side of the bag body; And is adhered to both sides of the corner portion including the hole forming region of the bag body so that the direction of tearability thereof extends along an oblique direction across the upper side and the side of the bag body; and at least one end of the tape. An easily tearable bag, comprising: a notch formed along the direction of exhibiting the tearability. 9. The easily tearable bag according to claim 6, wherein the heat fusible resin film is a polyethylene film and the organic resin film having rigidity is a nylon film. 10. The hole forming region has an average opening diameter of 0.
50 to 100 μm through-holes and / or non-through-holes
7. Formed by perforating the corner portion of the bag body at a density of 0 pieces / cm ² or more.
The easily tearable bag according to 7 or 8. 11. The easily tearable bag according to claim 6, 7 or 8, wherein the tape is an adhesive tape based on a uniaxially stretched organic resin film. 12. The easily tearable bag according to claim 6, wherein the tape is an adhesive tape based on a woven fabric in which warp yarns and weft yarns having different tear strengths are woven.