JP2012106748A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag allowing a content of nearly the size of the packaging bag to be easily extracted.SOLUTION: A folding line 11 at a root of a back bonded part 3 is arranged at a position deflecting to either of right and left from the center C in the width direction of this packaging bag, the back bonded part 3 is laid down toward a closer side from the folding line 11 of the root out of both right and left sides of the packaging bag, cutouts 13 or openings are formed at inner films of the back bonded part and a body at parts where the back bonded part 3 overlaps edge seal parts 6, inner surfaces of outer films are sealed to each other through the cutouts 13 or the like, thereby the back bonded part 3 is fixed in the laid state, areas from a back bonded seal part 5 to ends 9, 9 of the film 2 are formed into unsealed parts 4, 10, and the unsealed part 10 of the inner film of the back bonded part 3 is exposed from the end 9 of the outer film of the back bonded part 3.

Description

  The present invention relates to a packaging bag that can be easily opened from a back pasting portion.

  BACKGROUND ART Various types of packaging bags made of a film such as a plastic film or a composite film thereof are known as packaging bags for articles coated or impregnated with powder particles, liquids, viscous materials, and the like. In the case of a four-side seal or three-side seal flat bag, a standing pouch or a gusset bag, etc., it is normal to open the corner and take out the contents, or open one side and take out the contents It is.

However, if the size of the packaging bag (inner dimensions) and the size of the contents (outer dimensions) are the same, it cannot be removed by opening one corner, and even if one side is opened, It was not easy to take out the contents so that the impregnated material did not spill.
In order to solve the above-mentioned problems, there is a packaging bag that can be easily taken out even if the contents are the same size as the packaging bag by enlarging the opening by opening from the back pasting portion of the back-packing bag. It has been proposed (see Patent Document 1).

JP 2004-59063 A

In the packaging bag of patent document 1, in order to fix between the base material layer surface of a back seal part, and the base material layer surface by the side of a package body which overlaps with a back seal part, the heat seal layer is formed. In this case, since the side where the back seal part and the package body are bonded cannot be opened, in order to take out the contents, it is necessary to continue the tearing to the back side along the tearing auxiliary line. In the case of contents containing components that are liable to dripping or splashing, it is difficult to take out without contaminating the surroundings.
In addition, an appropriate heat seal layer material must be selected according to the surface state of the composite film, and if the contents contain oils, the heat seal layer may swell after opening.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the packaging bag which can take out the content of the magnitude | size substantially the same as a packaging bag easily.

In order to solve the above-mentioned problems, the present invention provides a pair of upper and lower portions formed along a back pasting portion formed by sealing a film in the shape of a palm, and an edge of a packaging bag intersecting with upper and lower ends of the back pasting portion. A wrapping bag having a main body portion in which contents are sealed by an edge seal portion, wherein the fold line at the base of the back pasting portion with respect to the main body portion is either left or right from the center in the width direction of the packaging bag. Provided at a biased position, the back pasting portion is tilted toward the side closer to the fold line of the root of the left and right sides of the packaging bag, in the portion where the back pasting portion and the edge seal portion overlap, A notch or an opening is formed in the film inside the back pasting part and the main body part, and the inner side of the film outside the back pasting part and the main body part is sealed through the notch or opening, so that the back pasting part is brought down. The film that is fixed in a state and has a palm-like shape in the back pasting portion is an unsealed portion between the back pasting seal portion that seals the back pasting portion and an end portion of the film, and the back pasting portion An unsealed portion of the inner film is exposed from an end portion of the outer film of the back pasting portion.
In the unsealed portion of the back pasting portion, it is preferable that notches for starting tearing from the end portion of the film are provided at least at two locations on the outer film.

According to the present invention, the fold line at the base of the back pasting part with respect to the main body part is provided at a position offset from the center in the width direction of the packaging bag to either the left or right side, and the back pasting part is included in the side part of the packaging bag. Since it is tilted toward the side closer to the fold line of the root, it can be opened greatly even if only one side is opened from the back pasting portion.
At the part where the back pasting part and the edge seal part overlap, a cutout or an opening is formed in the film inside the back pasting part and the main body part, and the inner surfaces of the film outside the back pasting part and the main body part are sealed, and the back pasting is performed. Since the portion is fixed in a state of being tilted, it is easy to tear the film outside the back-pasted portion. Furthermore, since it can be torn from the film inside the back pasting portion, it is not necessary to make one round of tearing to the back side. Further, it is not necessary to select a material for the heat seal layer in consideration of adhesion to the film surface and compatibility with the contents.
The film that has a palm-like shape at the back-pasted part has an unsealed part between the back-pasted seal part that seals the back-pasted part and the end of the film. Even when it is in close contact, etc., it becomes a handle when it is peeled off, and it becomes easy to pinch before opening. The unsealed part of the film inside the back pasting part is exposed from the end of the film outside the back pasting part, so when you hold the side part near the back pasting part by hand, The film inside can be pressed with a fingertip to facilitate opening.

(A) is a perspective view which shows an example of the packaging bag of this invention, (b) is sectional drawing which follows the AA line of (a). It is a top view of the packaging bag shown in FIG. It is the elements on larger scale which show an example at the time of replacing with the notch of the packaging bag shown in FIG. 1, and providing an opening. It is a top view which shows an example of the state which opened the packaging bag shown in FIG. It is a top view which shows another example of the packaging bag of this invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
The packaging bag 1 shown in FIG. 1 and FIG. 2 has a back-pasted portion 3 formed by sealing a film 2 with the inner surfaces of the film 2 facing each other in the vicinity of the end portions 9 and 9, A back-sealed bag having a main body portion in which contents 7 are enclosed by a pair of upper and lower edge seal portions 6, 6 formed along the edge of the packaging bag 1 intersecting the upper and lower ends 12, 12 of the back-pasted portion 3. (It is also referred to as “joint palm attachment” or “pillow type packaging bag”).
The fold line 11 at the base of the back pasting part 3 with respect to the main body part is provided at a position offset from the center C in the width direction of the packaging bag to the left or right (left side in FIG. 1). In addition, the back pasting portion 3 is tilted toward the side closer to the fold line 11 at the base of the left and right sides of the packaging bag 1 (left side in FIG. 1). When the back pasting part is superimposed on the main body part, the outer film on the back pasting part, the inner film on the back pasting part, the inner film on the main body part, the main body part in order from the front side (front side in FIG. 1) The outer film is laminated. Among these, inner surfaces are sealed between the film outside the back pasting part and the film inside the back pasting part, and between the film inside the main body part and the film outside the main body part.

In the present invention, in order to fix the back pasting portion 3 in a tilted state, a notch 13 is formed in the film inside the back pasting portion and the main body portion at the portion where the back pasting portion 3 and the edge seal portion 6 overlap. The inner surfaces of the film outside the back pasting portion and the main body portion are sealed through the notch 13. Alternatively, instead of the notches 13 at the upper and lower ends of the packaging bag, an opening 13A may be provided inside the edge seal portion 6 as shown in FIG.
Thereby, even when it cannot seal because the film inside the back sticking part and the film inside the main body part are the outer surfaces of the film 2, an adhesive layer such as a heat seal layer is provided on the outer surface of the film. The back pasting portion 3 can be fixed in a tilted state.
The shape of the cutout 13 or the opening 13A is not particularly limited, but specific examples include a circle, a semicircle, an oval, a rectangle, a polygon, and the like. One or more cutouts 13 or openings 13 </ b> A may be provided at the upper end and the lower end of the back pasting portion 3. In the case where the notch 14 is provided, it is preferable that the notch 13 or the opening 13A be provided on the side of the notch 14 near the end 9 of the film so that the opening can be more stably performed.

  The back pasting portion 3 is sealed by a back pasting seal portion 5 that is continuous between the upper and lower ends of the back pasting portion 3. In the case of this embodiment, since the upper and lower ends 12, 12 of the back pasting portion 3 are respectively extended and sealed from the edge seal portion 6, the upper and lower sides of the back pasting seal portion 5 are connected to the edge seal portion 6, respectively. The back pasting part 3 is sealed without leakage. Although the back-sealed seal portion 5 may be linear, it is preferable to have one or a plurality of top portions 8 and 8A protruding toward the end portion 9 as shown in FIGS. If the top portions 8 and 8A are provided on the back-sealed seal portions 5 and 5A, the force concentrates on the tips of the top portions 8 and 8A at the time of opening, so that it is possible to easily start peeling.

  The film 2 formed in the back-pasted part 3 has a non-sealed part 4 and 10 between the back-pasted seal part 5 and the end part 9 of the film. The seal part 10 is exposed from the end part 9 of the film outside the back pasting part 3 (part corresponding to the width D). Thus, even when the outer and inner films of the back pasting portion 3 are in close contact with each other due to static electricity or the like, it becomes a handle when the unsealed portions 4 and 10 are peeled off, and is easily pinched before opening. Moreover, since the distance E from the side part of the packaging bag 1 to the unsealed part 10 is short, the unsealed part 4 of the outer film is peeled off while pressing the unsealed part 10 of the film inside the back pasting part 3 with a fingertip. Can be torn.

The unsealed portion 4 of the back pasting portion 3 is provided with at least two notches 14 for starting tearing from the end 9 of the film 2. It is preferable that the notch 14 be provided near the upper and lower ends 12 and 12 having the notch 13 or the opening 13A because the notch 14 can be opened more stably.
The notch 14 is provided at least in the unsealed portion 4 of the outer film, but may be provided in both the unsealed portion 4 of the outer film and the unsealed portion 10 of the inner film as shown in FIG. . It is sufficient that tearing along the width direction (left and right direction in FIG. 2) of the back pasting portion 3 from the end portion 9 of the film toward the root fold line 11 is easy, and a uniaxially stretched film having a high tearability, A film substrate to which a tape (for tearing) is attached can also be used.

When opening the packaging bag 1 of this embodiment, the opening operation can be performed in a state where the contents 7 are placed flat with the side with the back pasting portion 3 as the upper surface and the opposite surface 16 as the lower surface.
Since the packaging bag 1 has the unsealed portions 4 and 10 on both ends 9 and 9 side of the film 2 from the back-sealed seal portion 5, when the packaging bag 1 is opened from the back-pasted portion 3, the back-sealed seal portion 5 is It can be easily peeled off. When notches 14 and 14 are provided at two positions above and below the unsealed portion 4 of the outer film, if the unsealed portion 4 of the outer film is pinched and pulled, a tear line 15 is formed from each notch 14 and 14. As shown in FIG. 4 (the contents 7 are not shown), an opening is formed.

When the unsealed part 4 of the outer film corresponding to the front side of the back pasting part 3 is pinched and opened from the back pasting part 3 to the right side, the fold line 11 at the base of the back pasting part 3 is offset to the left side of the packaging bag. Therefore, even if only one side is opened from the back pasting part 3, the big opening part can be formed and the contents 7 can be taken out. Thereby, since it is not necessary to continue tearing to the back side of a bag at the time of opening, it can suppress that the granular material, the viscous body, the liquid, etc. which adhered to or impregnated the contents scatter to the circumference. For this reason, even if the contents 7 are about the same size as the packaging bag 1 and are liable to cause dripping or scattering of adhered substances, the contents can be easily taken out from the packaging bag 1.
In addition, in order to open from the back pasting part 3 to the left side, the fold line 11 at the base of the back pasting part 3 is shifted to the right side of the packaging bag, and the back pasting part 3 is tilted to the right side and fixed to the bag body. You can also. If there is no distinction between the upper and lower parts of the contents 7 or if there is no problem even if the upper and lower parts are interchanged, the opening direction can be arbitrarily selected from the right side and the left side by rotating 180 degrees on the placement surface 16.
As shown in FIG. 5, when notches 14 and 14 are also provided at two locations above and below the unsealed portion 10 of the film inside the back pasting portion 3, it is easy from the film inside the back pasting portion 3. Can be opened. In this case, even the contents 7 having the same size as the packaging bag 1 can be opened from the back pasting portion 3 on both sides to expose almost the entire contents 7. When the notch 14 is provided in the unsealed portion 10 of the inner film, the position may overlap with the notch 14 provided in the unsealed portion 4 of the outer film. Further, the notch 14 of the inner unsealed portion 10 may be shifted to the upper and lower ends 12 side from the notch 14 of the outer unsealed portion 4, or the notch 14 of the outer unsealed portion 4 may be shifted to the inner unsealed portion. The upper and lower ends 12 may be shifted from the notch 14 of the portion 10.

  In the state which opened the packaging bag as shown in FIG. 4, since the opposite side of the back pasting part 3 becomes the mounting surface 16 of the content 7 among the films 2, the content can be grabbed or folded. Can be temporarily held when unfolding. In addition, since the area of the film 2 is increased, the film 2 can be used as a tray for a liquid or a granular material in which the film 2 is adhered or impregnated to the contents. A thin tray may be accommodated in the packaging bag 1 together with the contents 7, or the film 2 on the mounting surface 16 may be formed into a tray shape along the outer shape of the contents 7.

The film used as the film 2 constituting the packaging bag 1 is not particularly limited, but in order to constitute the packaging bag 1 by heat sealing, it is necessary to have heat sealability on at least one side, Those having heat sealability on one side on the inner surface side are preferred.
As such a film, for example, a laminate film obtained by laminating a sealant layer made of a resin having heat sealability on the surface of a base material layer made of a stretched film or the like can be used.
Examples of the base material layer include stretched films such as a biaxially stretched nylon film (Ny), a biaxially stretched polyethylene terephthalate (PET) film, a biaxially stretched polyester film, and a biaxially stretched polypropylene film.
Examples of the resin constituting the sealant layer include polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), polyolefin-based sealant resins such as cyclic polyolefin (COP), and modification or addition by a copolymer. Examples thereof include polyester-based sealant resins that have been provided with heat sealability. Also, an easy peel film or a partial coat of an easy peel material can be used.
Vapor deposition of metal foil such as aluminum foil, gas barrier resin film such as ethylene-vinyl alcohol copolymer, metal and inorganic compounds (for example, ceramics such as silica and alumina) as necessary to give gas barrier properties to the film It is preferable to use a laminate film having a layer or the like as an intermediate layer.

Although the dimension of the packaging bag 1 is not specifically limited, About 30-300 mm is illustrated as a height and width | variety of a packaging bag, respectively. The magnitude relationship between the height and the width is not particularly limited, and any of those having the same height and width, a height larger than the width, a width larger than the height, and the like can be applied.
Although the dimension of the back pasting part 3 is not specifically limited, It is preferable on manufacture that the height is made the same as the height of the packaging bag 1.
The dimension B where the fold line 11 at the base of the back pasting portion 3 is offset from the center C in the width direction is less than 50% with respect to the entire width of the packaging bag, but can be, for example, about 10 to 45%. The width D at which the film inside the back pasting portion 3 is exposed is preferably about 1 to 10 mm, for example, about 5 mm.

If the seal width of the back-sticking seal portion 5 is too thin, it is difficult to ensure the sealing performance at the back-sticking portion 3, and if it is too thick, it is difficult to peel off. It is preferable to set appropriately according to the seal strength and the like, for example, about 1 to 10 mm is preferable. The seal strength of the back-sealed seal portion 5 is not particularly limited, but in the case of easy peel, it is about 2 to 15 N / 15 mm at 180 ° peel strength, and in the case of a normal seal, it is 15 N at 180 ° peel strength. / 15 mm or more, or 23 N / 15 mm or more is preferable.
The seal width of the edge seal portion 6 is, for example, about 1 to 50 mm, and about 2 to 20 mm is preferable from the viewpoint of easy peeling when the entire surface is opened.

INDUSTRIAL APPLICABILITY The present invention can be used for packaging various contents, and is particularly suitable as a packaging bag for articles coated or impregnated with powder, liquid, viscous material, and the like.
Of course, the contents can be accommodated even if they are small, but contents having the same size as the packaging bag are suitable. Further, even contents larger than the packaging bag can be accommodated by being folded or rolled, preferably gathered into a flat shape.

Specific examples of contents include cotton products such as gauze and sheet materials containing lotion and alcohol, hygiene products such as alcohol cotton for disinfection, pharmaceutical products, cosmetics, poultice and eye masks, face masks, Various things are applicable without limitation, such as hairdressing and beauty supplies such as neck sheets and skin care products, foods such as hanpen, konjac, pizza, cloths soaked with detergent, cleaning tools such as rags, and the like.
Specific examples of powders, liquids, viscous materials, etc. that can adhere to or impregnate the contents include water, alcohol, saline, lotion, pharmaceuticals, seasonings, seasonings, organic solvents, oils, various solutions Various flours such as wheat flour, honey, syrup, cream, adhesives, pressure-sensitive adhesives, inks, toners and the like can be used without particular limitation.

The method for producing the packaging bag of the present invention is not particularly limited, but can be carried out in the same manner as the conventional method for producing a back-attached bag only by changing the length and position of the back-attached portion and the shape of the back-attached seal portion. . A vertical pillow system that transports the original film in the vertical direction and fills the contents with a nozzle or funnel, etc., or a horizontal pillow that transports the original film in the horizontal direction and places the contents on the horizontally extended film for packaging. Any of the methods may be used, but the horizontal pillow method is preferable in the case of filling and packaging a content that is about the same size as a packaging bag and easily loses its shape.
Although it does not specifically limit as a seal type | mold used for formation in the back sticking seal part 5, The method using a seal type which can form the back sticking seal part 5 whole at once, a divided | segmented seal type, and roll shape A continuous forming method using a seal mold is applicable. As a sealing method, a conventional method such as a hot plate type, a hot roll type, an ultrasonic wave, and a high frequency can be applied.

  Since the back-attached bag (pillow type) having a pair of edge seal portions 6 and 6 continuous with both ends of the back-attached seal portion 3 together with the back-attached seal portion 5 is provided, However, since the area of the packaging bag is not increased, no extra space is required for packing or display. In addition, since the opening operation can be performed with the contents placed flat at the time of opening, it is possible to suppress scattering of particles, viscous bodies, liquids, etc. adhering to or impregnating the contents. Moreover, even if the content 7 is as large as the packaging bag 1, the entire content can be exposed without touching the content during the opening operation.

Moreover, in the case of FIGS. 1-5, although the both ends of the width direction of a packaging bag are comprised by the folding | folding of the film 2, in addition to the back sticking seal | sticker part 5 and the edge seal | sticker part 6, a packaging bag It can also be set as the packaging bag which sealed the one side edge part or both edge part of the vertical direction.
Moreover, in the case of FIGS. 1-5, although the packaging bag 1 is comprised by the folding | turning of the film 2 of 1 sheet, it can also be set as the packaging bag which combined the 2 or more film.

  INDUSTRIAL APPLICABILITY The present invention can be used for packaging various contents, and is particularly suitable as a packaging bag for articles coated or impregnated with powder, liquid, viscous material, and the like.

DESCRIPTION OF SYMBOLS 1,1A ... Packaging bag, 2 ... Film, 3 ... Back sticking part, 4 ... Unsealed part of the film outside a back sticking part, 5, 5A ... Back sticking seal part, 6 ... Edge seal part, 7 ... Contents , 8, 8A ... top part, 9 ... both ends of the film, 10 ... unsealed part of the film inside the back pasting part, 11 ... fold line at the base of the back pasting part, 12 ... upper and lower ends of the back pasting part (seal part) , 13 ... Notch, 13 A ... Opening 14 ... Notch, 15 ... Tear line, 16 ... Back surface (mounting surface) of the main body.

Claims (2)

The contents are enclosed by a back pasting portion formed by sealing the film in a palm-like shape and a pair of upper and lower edge sealing portions formed along the edge of the packaging bag intersecting the upper and lower ends of the back pasting portion. A packaging bag having a body portion,
The fold line at the base of the back pasting portion with respect to the main body portion is provided at a position offset to the left or right from the center in the width direction of the packaging bag, and the back pasting portion is the left or right side of the packaging bag. A notch or opening is formed in the film on the inner side of the back pasting portion and the main body portion at the portion where the back pasting portion and the edge seal portion overlap each other when the back pasting portion and the edge seal portion overlap each other. The inner surface of the film on the outside of the back pasting part and the main body part is sealed through, so that the back pasting part is fixed in a collapsed state,
The film that has a palm-like shape in the back pasting portion is an unsealed portion from the back pasting seal portion that seals the back pasting portion to the end of the film, and the film inside the back pasting portion The unsealed part is exposed from the edge part of the film of the outer side of the said back pasting part, The packaging bag characterized by the above-mentioned.   The packaging according to claim 1, wherein the unsealed portion of the back pasting portion is provided with notches for starting tearing from an end portion of the film at least at two locations on the outer film. bag.

Images