JP2000203598A - Half open gusset packaging bag - Google Patents

Abstract

(57) [Problem] To provide a gusset packaging bag that can be easily opened and has a spout after opening. SOLUTION: The gussets on both sides are folded inward, and a top seal portion 5 formed by heat sealing the top horizontally at a predetermined width is torn in a horizontal direction from one side end thereof, and the top seal portion 5 Notch 7 provided almost at the center
The upper part of the gusset bag is opened by means of tear stop and tear piece removing means, and by means of tear opening center opening means by a non-heat sealing area 9 having a predetermined width and length provided along the lower side of the top seal part 5. In addition, an easy opening function of opening a half-open shape and an easy pouring function of easily forming a spout C by pulling out the folding gusset outward are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gusset bag which can be easily opened and poured.

[0002]

2. Description of the Related Art A gusset bag has a three-side seal bag,
Unlike the seal bag and pillow packaging bag, the gusset is folded in from the left and right and has a complicated structure. The upper part is gripped with a finger and pulled apart back and forth, and the heat seal layer is peeled off from the approximate center of the top seal part and opened, or if not opened with non-heat seal parts just below the top seal part with scissors etc. In general, a method of horizontally cutting a part or the whole of a part is performed.

[0003]

However, it is possible to manually open the central portion of the top seal portion of the gusset bag by the above-described method when the top seal portion is a weak seal, but the sealing strength is low. If it increases, it will be difficult to open, and in some cases, there is a problem that the contents are scattered at the moment of opening due to excessive force. In addition, the opening shape is such that the entire upper part is opened, and it is good to take out the contents at a time in a wide mouth container etc., but it is very difficult to handle when refilling into a container etc. with a small opening area, or when taking out an appropriate amount in small quantities. Problem. In addition, there is a problem that it is difficult to take out a part of the contents and store the remaining contents without re-sealing without any jig. The method of using scissors or the like for opening is a problem that is inconsistent with easy opening. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a gusset bag which not only is easy to open but also allows contents to be easily taken out.

[0004]

Means for Solving the Problems A half-opening gusset packaging bag according to the present invention, which has been made to solve the above problems, has a quadrangular prism-shaped gusset-forming film comprising a front film, a rear film and left and right gusset-forming films. A gusset bag having a square bottom with a top seal formed by heat-sealing the top part horizontally by forming the top seal part, wherein the top seal part is provided with a tear stop means, a tear piece removing means, and a tear part center opening means. The top seal portion is torn in a longitudinal direction by an easy tearing means from one side end of the top seal portion, and one half of the top seal portion is opened, and the gusset-forming film on the unsealing side is directed outward. Being drawn out to form a spout, the tear stop means and a tear strip removing means. Is formed substantially in the center of the top seal portion, in a direction substantially perpendicular to the longitudinal direction, and provided in a range not exceeding the heat seal width of the top seal portion. And a non-heat-sealing region provided between the side edge and the cut along the lower side of the top seal portion.
Further, it is preferable that the laminated film used for the gusset bag has a straight tearing property in which the top seal portion is molecularly oriented in a longitudinal direction of the top seal portion, and has a heat seal property only on the inner surface.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A half-opening gusset packaging bag 10 according to the present invention will be described below in detail with reference to the drawings. FIG.
1 is a rear perspective view of a half-opening gusset packaging bag according to the present invention. As shown in FIG. 1, a half-open gusset packaging bag 10 according to the present invention is formed by sealing a front film 1, two left and right rear films 2, left and right gusset forming films 3, and a rear film inner surface. It is composed of a back seal part 4, a top seal part 5 formed by folding the gusset-formed film 3 inward and heat-sealing, and a flat square bottom B. At first glance, the appearance shape is as follows: It is no different from the gusset bag used conventionally.

FIG. 2 is a rear view of the half-opening gusset packaging bag according to the present invention. As shown in FIG. 2, the half-opening gusset packaging bag 10 according to the present invention has a top seal portion 5 formed by folding the gusset forming films 3 on both sides inward and heat-sealing horizontally with a predetermined seal width d. The top seal portion 5 can be easily torn in a horizontal direction as shown by a dotted line in FIG. 1 from its side end by an easy tearing means built in the inside.
As the easy tearing means, a laminated film having a straight line that can be torn in the longitudinal direction of the top seal portion 5 is used as a material of the gusset bag, and a notch 6 is provided at a side end where the tearing starts as shown in FIG. Is preferred. The shape of the notch 6 may be any of I type, U type, V type and the like. In addition, innumerable scars may be attached to the side edges in place of the notch, and the tearing may be started by using a scar of a part of the designated location as a trigger. Furthermore, instead of using a laminated film with tearing straightness, it is used on the front side of the laminated film used for gusset bags,
A laser cut line (indicated by the same dotted line) is formed by scanning a laser beam in advance in a tearing direction on a polyethylene terephthalate film (PET) layer having tear resistance, and a top seal is formed according to the laser cut line. The part 5 may be torn in the longitudinal direction. In the case where the tear interval of the top seal portion 5 is short, the use of a laminated film having a straight tearing property and the need for laser cutting can be omitted.
This tearing proceeds along the dotted line in the longitudinal direction of the top seal portion 5, but at a portion consisting only of the front film 1 and the back film 2 located near the center of the heat seal region 8 indicated by the hatched portion of the top seal portion 5. Top seal width d
, And stopped by a cut 7 provided in a direction perpendicular to the tearing direction, and the cut 7 causes a portion of the top seal portion 5 above the tear line as a tear piece 5 ′ above the cut 7. Is cut off, leaving a slight connection. However, this splice can be easily cut by pulling the tear piece 5 'upward, and the tear piece 5' is completely cut off.
(See FIG. 3) As described above, by removing the tear piece 5 ', it is possible to eliminate the obstruction when taking out the contents. As described above, the cut 7 functions as a tear stop means and a tear piece removing means. In addition, the tear from the side end to the cut 7 passes through the heat-sealing area 8 indicated by hatching at the beginning and end, and passes through the non-heat-sealing area 9 where heat sealing is not performed. Is provided with a predetermined width and length, so that at the time of tearing, the gusset-forming film 3 in the non-heat-sealing region 9 is also torn at the same time, so that one side of the top seal portion 5 can be easily opened. . As described above, the non-heat-sealed region 9
Function as tear center opening means. Such a non-heat-seal region 9 can be formed only by changing the shape of the heat-seal bar of the top seal of the gusset bag making machine.

FIG. 3 is a supplementary explanatory diagram of the function of the half-opening gusset packaging bag according to the present invention. As shown in FIG. 3 (a), in the top seal portion 5 of the half-opening gusset packaging bag 10 according to the present invention, the folded portion of the gusset-forming film 3 on both sides and the central back seal portion 4 are taken up by the rolled material. Although the film is heat-sealed in four layers, the portion where the cut 7 is provided is constituted only by the front film 1 and the rear film 2. In FIG. 3, the area where heat sealing is performed is indicated by dots. As described above, the top seal portion 5 is torn from the side edge,
The state in which the tear piece 5 'has been cut off is shown by FIG. 3 (a). Thus, the non-heat-sealed area 9
Only when one side is torn in the longitudinal direction, one side is opened. However, in this state, the contents cannot be taken out yet, so that the folded gusset-forming film 3 is pulled out to the outside and the folded line L at the end thereof is reversely folded, as shown in FIG. An outlet C similar to a carton can be formed. This shape has a very good pourability as demonstrated in the Goebel top carton. Then, in the half-opening gusset packaging bag 10 according to the present invention, the spout can be folded back again and resealed in the state shown in FIG. As described above, the half-opening gusset packaging bag 10 according to the present invention has both easy opening property and easy pourability, and is not completely sealed but can be returned to the state before opening. It is a high value-added gusset bag that can be widely applied to powder and granular contents.

The raw film used for the half-opening gusset packaging bag 10 according to the present invention has a heat sealant layer at least on the innermost surface, and has a higher melting temperature than the heat sealant layer on the outermost surface. A resin layer that is difficult to heat seal is formed.
Since a self-sustaining gusset bag and a shape retaining property of the spout C are required, a laminated film having moderate rigidity is preferably used. In addition, it is preferable to use a laminated film having a straight-line tearing property in the tearing direction. For example, using a PET film that is difficult to heat-seal as the outermost layer, providing a polyolefin-based resin layer made of linear low-density polyethylene, ethylene-vinyl acetate copolymer, or the like as a heat sealant layer on the innermost surface, and the winding flow Strong, such as Calarian Y (horizontal uniaxially stretched high-density polyethylene film, manufactured by Toyo Chemical Co., Ltd.) that tears linearly in the direction (TD) perpendicular to the direction, and other base materials (aluminum, paper, polyethylene terephthalate film, A layer provided with a film material that does not lose its linear tearability even when laminated with a stretched polypropylene film, a nylon film, cellophane, etc.) is preferably used. Further, even a stretched polypropylene film which is oriented in the TD direction by changing the blow ratio during blow molding can be suitably used because a straight tearing property can be obtained. As a specific example, the following layer configuration can be given. PET12mμ / PE15mμ / Aluminum foil 9mμ / P
E 15 μm / LLDPE 50 μm PET 12 μm / high-quality paper / PE 15 μm / OPE (Toray Kagaku Co., Ltd., Karalyan Y) 18 μm / LLDPE
OPP (FOF-BT, manufactured by Nimura Chemical Co., Ltd.) 35 μm
/ LLDPE40-50μm OPE is replaced by OPP (Toray Industries, Inc.)
Manufactured by YT-22) 25 mμ, or OPP (YT-12 manufactured by Toray Industries, Inc.) 40 mμ. Here, LLDPE; linear low density polyethylene OPE; stretched polyethylene OPP; stretched polypropylene PE; polyethylene PET; polyethylene terephthalate

A half-open gusset packaging bag 10 according to the present invention.
The present invention is not limited to the above embodiments and drawings, and various modifications can be made without departing from the gist of the present invention. For example, in the case of a gusset bag in which gussets are formed on both side walls, the structure of the bottom portion B of the square bottom is free, and the bottom portion B may be formed in the corner bottom in advance like a self-opening square bottom bag. Also, the position of the back seal portion 4 does not necessarily have to be provided at the center, and may be any position as long as it does not hinder the half opening means of the present invention. Further, creasers (side seals) may be provided in the vertical direction along the ridge lines at the four corners.

[0010]

According to the present invention, a half-open gusset packaging bag 10 according to the present invention.
According to the above, the top seal portion 5 can be formed only by hand without using a jig.
Can be easily opened by tearing in a straight line along its longitudinal direction, and the folded gusset forming film 3 can form a spout similar to a gobel top carton, while leaving a tear piece 5 '. So that it is easy to take out the contents from the outlet C,
It can be suitably used in cases such as refilling into other containers. In addition, only one use can be dispensed, and each time the spout C is resealed, the remaining contents can be stored in an independent state. Further, it can be applied to a very wide range of contents such as liquids, powders, and granules. In the manufacturing method, the conventional bag making / filling machine for gusset packaging bags or the bag making machine can be used as it is simply by replacing the seal jaw in the top seal portion, and therefore there is no factor that greatly increases the processing cost.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of a half-opening gusset packaging bag according to the present invention.

FIG. 2 is a rear view of a half-opening gusset packaging bag according to the present invention.

FIG. 3 is a supplementary explanatory diagram of the function of the half-opening gusset packaging bag according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front film 2 back film 3 gusset forming film 4 back seal portion 5 top seal portion 5 ′ tear piece 6 notch 7 cut 8 heat seal area 9 non-heat seal area 10 half-open gusset packaging bag B bottom part C spout L according to the present invention Broken line

Continued on front page F-term (reference) 3E064 AA13 BA17 BA22 BA27 BA28 BA30 BA36 BA55 BB03 EA12 FA04 FA06 HN05 HP01 HP05 HS05 3E067 AA03 AA05 BA12A BB12A BB14A BB25A CA24 EA06 EB07 EB10

Claims (4)

[Claims] 1. A square-bottomed gusset bag formed by folding inward a quadrangular prism-shaped gusset-forming film comprising a front film, a rear film, and left and right gusset-forming films and heat-sealing a top portion horizontally to form a top seal portion. By providing the top seal portion with a tear stop means, a tear strip removing means and a tear portion center opening means, the top seal portion can be easily torn from one side end of the top seal portion in the longitudinal direction by means of easy tearing means. A half-opening gusset packaging bag, wherein the gusset-forming film on the opening side is pulled out to form a spout, by tearing to open one half of the top seal portion. 2. A notch provided in the substantially center of the top seal portion, substantially perpendicular to the longitudinal direction and not exceeding the heat seal width of the top seal portion, wherein the tear stop means and the tear piece removing means are provided. 2. The half-open gusset packaging bag according to claim 1, wherein 3. The tear-opening center opening means is formed by a non-heat-sealing area provided between the side end and the cut along a lower side of the opening-side top seal portion. Item 2. A half-opening gusset packaging bag according to item 1. 4. The laminated film used for the gusset bag has a straight tearing property in which a molecular orientation is oriented in a longitudinal direction of the top seal portion, and has a heat seal property only on an inner surface. A half-opening gusset packaging bag as described.