JP3924678B2 - Packaging bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag, and more particularly to a heat seal structure of a packaging bag.
[Prior art]
[0002]
A packaging bag formed by laminating a plastic film has a heat seal structure for laminating the plastic film. For example, in order to form one sealed packaging bag from two plastic films, the edge of the plastic film is heat-sealed over the entire periphery of the plastic film. Alternatively, in order to make the packaging bag self-supporting, a plastic film for the bottom of the packaging bag is provided with a W-shaped plastic film for the bottom, and two plastic films for forming the side surface and the plastic for the W-shaped bottom Heat sealing is performed by overlapping the film.
[0003]
[Problems to be solved by the invention]
In the conventional packaging bag, since the plastic film is heat-sealed, the edge of the plastic film becomes hard like a plastic thin plate having a linear outer line. When the packaging bag is held, the edge formed into a thin plate by heat sealing hits the hand, so that the hand receives a hard and sharp feel from the edge.
[0004]
In normal use, it is designed not to cut the hand at the heat-sealed edge, but in order to give the packaging bag the handle as described above, it is formed by heat-sealing a plastic film. The person who uses the packaging bag is given a potential anxiety that the hand may be cut.
In addition, there is no denying the possibility of cutting the hand under abnormal usage conditions.
[0005]
The present invention has been made to solve the above-described problems, and prevents the user of the packaging bag from feeling uneasy about cutting his / her hand, thereby forming a package formed by heat sealing. The purpose is to increase the demand for bags.
In addition, since the possibility of cutting the hand under circumstances that are not normal usage cannot be denied, the object is to make the hand as difficult as possible in such a situation.
[0006]
[Means for Solving the Problems and Effects of the Invention]
Packaging bag of the present invention in order to achieve the above object, a first means for solving problems, in the packaging bag is formed by heat sealing the edges of the plastic film, of the heat sealed edges packaging The heat-sealed areas at the ends and the areas not heat-sealed at the ends are alternately arranged in the portion that comes into contact with the hand when grasping the bag .
[0007]
The second problem solving means is the first solving means formed so that the regions which are not heat-sealed at the end portions adjacent to each other are stepped.
[0008]
The third problem-solving means is the first or second problem-solving means in which the outer line of the end portion that is not heat-sealed is a curved line that protrudes outward.
[0009]
Fourth problem solving means, in any one of the first to third means for solving problems, the inside line of the heat sealed edges by protruding into the bag interior side, forming a constricted portion, the constricted portion The outer line is a straight line.
[001 0 ]
The operational effects of the first problem solving means will be described. The area where the heat sealing is not performed at the end has a structure in which two or more plastic films are independent. However, since each plastic film itself is thin, the edges are soft, but there is no area where the heat is sealed at the end. Compared with the case where the sheet is divided into two, the plastic film becomes thicker in the heat-sealed region, and the hand is hard to slip and is easy to hold. This can relieve the anxiety of cutting hands.
Further, it is possible to make a structure in which dirt such as dust hardly accumulates compared to a case where the end portion is not heat-sealed at all. When the end portion is not heat sealed at all, if the width of the edge portion is the same, the sealed area is narrowed, the sealing strength is weakened, and the content is likely to leak. Further, since there is a region that is heat-sealed at the end portion, there is a possibility that the heat-sealed portion is intentionally peeled off by pulling a portion that is not heat-sealed.
[001 1 ]
According to the second problem-solving means, even if the hand with the packaging bag slips, the heat-seal is continuously applied to the same part of the hand, because the non-heat-sealed regions at the ends adjacent to each other are stepped. The psychological effect of relieving the anxiety of cutting the hand can be improved because it becomes difficult to cut the hand when the edge is not hit.
[001 2 ]
According to the third problem solving means, the region that is not heat-sealed at the end due to the outwardly convex curve is further easily deformed, and the anxiety of hand cutting can be relieved.
[001 3 ]
According to the fourth problem solving means, the constricted portion formed by projecting the inner line of the heat-sealed edge portion into the bag is pulled inward when the contents are put, and the heat-sealed edge Since the part falls down in either the front or back direction, the end of the heat-sealed edge part does not hit the hand when it is held by hand, and it is difficult to cut the hand and at the same time has the effect of making it easier to hold.
[001 4 ]
In particular, the outer edge of the heat-sealed edge portion has a linear shape at the constricted portion, so that the inclination when the heat-sealed edge portion falls down can be increased.
[001 5 ]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, the packaging bag of 1st Embodiment of this invention is demonstrated using FIGS. 1-4.
FIG. 1 is a front view showing a configuration example of the packaging bag of the first embodiment. The packaging bag in FIG. 1 is empty with no contents. The packaging bag 1 of FIG. 1 is formed by stacking a plurality of plastic films on the front and back. That is, the plastic film 2 at the front and the plastic film at the back (not shown) are formed in a bag shape by heat-sealing the edge 3 thereof. The hatched portion is the heat-sealed portion. The edge portion 3 is heat-sealed in both the upper, lower, left and right directions, so that the contents do not leak.
A connector 4 is sandwiched between two plastic films and heat-sealed together with the edge 3 at the top of the packaging bag 1.
For example, the packaging bag 1 can be configured such that the lower left and right width is 120 mm, the upper left and right width is 60 mm, the vertical height is 210 mm, and the heat seal width is about 6 mm.
[001 6 ]
FIG. 2 is a perspective view of the packaging bag 1 shown in FIG. 1 with the contents placed therein, and FIG. 3 is a side view of the packaging bag 1 containing the contents. 4 is a partially enlarged view of FIG. 3 showing the region X shown in FIG. 3 in an enlarged manner.
As shown in FIG. 2, the packaging bag 1 is a bottomed self-supporting bag in which a W-shaped bottom plastic film 8 is sandwiched between a plastic film 2 and a plastic film in the back thereof. is there.
[001 7 ]
The inner line 5 of the edge 3 that has been heat-sealed is substantially parallel to the end of the edge 3, and a constricted portion 6 is formed at a substantially central portion in the vertical direction. The constricted portion 6 is formed by projecting the inner line 5 toward the bag inner side.
[00 18 ]
Of the heat-sealed edge 3, the portion 7 a that is not heat-sealed at the end portion and the region 7 b that is heat-sealed at the end portion are alternately arranged in the portion that touches the hand when the packaging bag 1 is gripped by hand. Is arranged.
For example, when using a plastic film having a thickness of 100 μm to 200 μm based on polyethylene terephthalate, polypropylene, nylon, etc., the length of the non-heat sealed region 7a in the vertical direction is 8 mm to 10 mm and heat sealed. It is preferable that the vertical length of the region 7b is 1 mm to 2 mm.
[00 19 ]
By inserting the contents, the portion where the constricted portion 6 is formed is pulled inside the packaging bag 1, so that the heat-sealed edge portion 3 near the constricted portion 6 is distorted and falls forward or backward. Therefore, easily grip when with packaging bag, the ends of the edge 3, which is heat sealed is not hit in the hand, it becomes difficult to cause hand cutting, hardly slip out of hand.
In particular, by making the outer line 9 of the heat-sealed edge 3 in the vicinity of the constricted part 6 straight, the degree of distortion of the heat-sealed edge 3 increases and falls greatly forward or backward. The effect of preventing cutting or being easy to hold can be improved.
[002 0 ]
(Second Embodiment)
FIG. 5 is a partial plan view showing the configuration of the heat-sealed edge portion of the packaging bag according to the second embodiment of the present invention. In FIG. 5, the heat-sealed portion is indicated by hatching.
In the edge portion 3A of the second embodiment, the end portion heat-sealed regions 11 and the end portion non-heat-sealed regions 12 are alternately arranged. 3 is different from the first embodiment in that the heat-sealed region 11 at the end of the edge 3A of the second embodiment is independent in an island shape. The regions that are heat-sealed as in the first embodiment do not need to be connected, and the regions 11 that are heat-sealed as in the second embodiment may be separated and independent from each other.
By comprising as mentioned above, the area of a heat seal part can be decreased and it can be made softer.
[002 1 ]
(Third embodiment)
FIG. 6 is a perspective view showing the configuration of the heat-sealed edge of the packaging bag according to the third embodiment of the present invention.
Although the edge portion 3 of the first embodiment has a planar heat seal structure, as shown in FIG. 6, the edge portion 3B of the third embodiment is heat-sealed at the end portions adjacent to each other. The regions 20 and 21 that are not present are formed to be stepped.
By making the non-heat-sealed region 20 uneven, when the hand slides along the edge 3B, the same position of the hand will not be continuously rubbed at the end of the edge 3B, thus preventing hand cuts. can do.
[002 2 ]
(Fourth embodiment)
FIG. 7 is a partial plan view showing the configuration of the heat-sealed edge of the packaging bag according to the fourth embodiment of the present invention. In FIG. 7, the heat-sealed portion is indicated by hatching.
As shown in FIG. 7, the outer wire 31 in the areas which were not heat-sealed end. 3C, since a curve convex outwardly, and become more flexible in comparison with the case where a straight line, also hardly slip , Less worry about cutting hands.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a packaging bag according to a first embodiment.
FIG. 2 is a perspective view showing a state in which contents are put in the packaging bag of FIG.
3 is a side view of the packaging bag of FIG. 2. FIG.
4 is a partially enlarged view in which a region X of the packaging bag of FIG. 3 is enlarged.
FIG. 5 is a plan view showing a heat-sealed edge of a packaging bag according to a second embodiment.
FIG. 6 is a plan view showing a heat-sealed edge of a packaging bag according to a third embodiment.
FIG. 7 is a plan view showing a heat-sealed edge of a packaging bag according to a fourth embodiment.
[Explanation of symbols]
1 packaging bag, 2 plastic film, 3, 3A-3C edge, 4 connector.

Claims (4)

In the packaging bag formed by heat-sealing the edge of the plastic film, the heat-sealed region at the end of the heat-sealed edge , when the hand hits the packaging bag, The packaging bag characterized by alternately arrange | positioning the area | region which is not heat-sealed of an edge part.   The packaging bag according to claim 1, wherein the regions that are not heat-sealed at the end portions adjacent to each other are formed to be stepped.   The packaging bag according to claim 1, wherein an outer line of a region where the end portion is not heat-sealed is an outwardly convex curve.   The inside line of the said edge part heat-sealed is protruded inside the bag, thereby forming a constricted part, and the outside line is linear in the constricted part. The packaging bag as described in any one of.

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