JP2006131231A - Simple standing pouch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple standing pouch in which the number of films used is less, the manufacturing cost is cheap, different films can be used for the surface and the back surface, and a continuous picture pattern can be applied on the surface and the bottom. <P>SOLUTION: The lower end of the surface film is joined to the lower end of the back surface film, and the lower part of the surface film is folded between the back surface film and the surface film so that the folded front lower end position of the surface film reaches the lower end position of the back surface film. The inner faces of the folded front lower end edge part of the surface film are heat-welded together to form a front lower end seal part. The joined faces of the inner face of the folded back lower end edge part of the surface film with the lower end edge part of the back face film are heat-welded to form a back lower end seal part. The joined faces of the inner faces of both left and right end edge parts of the surface film with both the left and right end edge parts of the back surface film, and the inner faces of the folded front both left and right end edge parts of the surface film, and the joined faces of the inner faces of the folded back both left and right end edge parts of the surface film with both the left and right end edge parts of the back surface film are heat-welded to form side end seal parts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a simple standing pouch made of a plastic film that contains contents such as liquid, powder, solid, and viscous material.

  Conventionally, as a self-supporting bag-like flexible package, there is a so-called standing pouch made of a plastic film. In this standing pouch, a film forming a separate bottom portion is folded between the lower end portions of the film forming the front and back side wall portions, the right and left side edge portions are heat-sealed, and the bottom edge portion is set to the front and back side portions. The part of the film that forms the bottom position at the lower end position of the film part that forms the front and back side wall positions using one film and the one that is heat-sealed in a downward arc shape at the lower end part The bag was made by heat-sealing the left and right side edges of the front and back side walls and the bottom.

From the viewpoint of manufacturing cost, the latter standing pouch is cheaper than the former standing pouch, and as this latter standing pouch, for example, there is one described in Patent Document 1. This standing pouch is composed of two side wall portions in which side seal portions are formed by heat-sealing the respective side edge portions, and a bottom portion formed by gusset folding. Formed from one film, from the lower end of the bottom side seal part to the lower end of each side edge part divided into two parts by gusset folding, to form a gusset seal part by heat fusion in two parts, It was the self-supporting bag which formed the lower end seal part by heat-seal | fusing the two lower end parts of a bottom part.
JP 2002-225878 A

  However, the former standing pouch, which consists of a film that forms the front and back side walls and a film that forms the bottom, is expensive to manufacture bags, and the bottom is fixed upward when the contents are stored. The internal volume may be reduced accordingly. In addition, the latter standing pouch made of a single film has a low manufacturing cost for bag making, but depending on the purpose of use of the pouch, the front and back films having different characteristics may be used for the film forming the front and back side walls. In some cases, it is desired to apply a continuous pattern to the front side wall portion and the bottom portion. In this case, the latter standing pouch made of a single film cannot be applied.

  The present invention solves the above-mentioned problems of the conventional standing pouch, and the number of films used is small and the manufacturing cost of bag making is relatively low. Depending on the purpose of use of the pouch, the surface film and the back film can be used. The present invention provides a simple standing pouch in which different films can be used and a continuous pattern can be provided on the surface and bottom of the pouch.

That is, according to the first aspect of the present invention, the rectangular front film and the back film are overlapped, the left and right end edges are heat-sealed to form side end seal parts, and the lower end edge is heat-sealed. In the rectangular pouch that forms the bottom seal portion, the bottom end of the surface film is aligned with the bottom end of the back film, and the lower portion of the surface film is positioned between the back film and the surface film, and the front bottom end position of the front film is folded. Folded into an M shape so that it is at the lower end position of the back film, the front lower end seal part is formed by heat-sealing the joining surface of the inner surface and inner surface of the front film at the front lower end edge of the surface film. Folding the inner surface of the rear lower edge and the lower edge of the back film is heat-sealed to form a rear lower seal, and the inner surface of the left and right edges of the surface film and the back film The mating surface of the right edge, the mating surface of the front and rear left and right edges of the front film, the inner surface of the front and rear right and left edges of the front film, and the right and left edges of the back film A simple standing pouch characterized in that a side end seal portion is formed by heat-sealing with a surface to form a square bottom portion that can stand up when the contents are stored.

  The second invention of the present invention is the simple standing pouch according to the first invention, wherein films having different characteristics are used for the front film and the back film.

  The simple standing pouch of the present invention has two films, a rectangular surface film and a back film, overlapped so that the lower end of the surface film is aligned with the lower end of the back film, and the lower part of the surface film is overlapped with the back film. Between the front film and the front film, the front film is folded in an M shape so that the front lower end position of the back film is the lower end position of the back film, and the left and right side end seal portions and the lower end seal portion are formed so as to be able to stand by heat fusion Compared to a conventional standing pouch comprising a front film, a back film, and a film forming the bottom, the number of films is small and the manufacturing cost of bag making is low.

  In addition, the conventional standing pouch of the present invention is different from the conventional standing pouch made of a single film, and a film having different characteristics can be used for the front film and the back film. A pouch having combined characteristics can be produced.

  Moreover, since the simple standing pouch of the present invention is formed of the same film on the surface and the bottom of the pouch, a continuous pattern can be applied to the surface and the bottom of the pouch.

  Next, an embodiment of a simple standing pouch according to the present invention will be described in detail with reference to the drawings.

  FIG. 1A is an explanatory view showing a structure of a simple standing pouch according to the present embodiment, and FIG. 2B is a cross-sectional view taken along line A-A ′. FIG. 2 is an explanatory diagram showing how to make a simple standing pouch according to the present embodiment.

  The standing pouch of the present embodiment is a self-supporting square-shaped bag made using two plastic films of a rectangular front film and a back film having the same width in the left-right direction and different lengths in the vertical direction. It is a pouch. As the plastic film, a single layer film such as polypropylene or polyethylene or a laminated film having a barrier film in the constituent layers is used. When the contents are stored, a square bottom portion that can stand by itself is formed, and the upper end opening is heat-sealed to form an upper end seal portion for sealing.

As shown in FIGS. 1A and 1B, the structure of the standing pouch (10) of the present embodiment is such that the front film (100) and the back film (200) take into account, for example, the protection of the contents of the pouch. (Outside) laminated film of transparent vapor deposition film (16 μm thickness) / stretched nylon film (15 μm thickness) / unstretched polypropylene film (60 μm thickness) (inside) configuration, with the lower end of the surface film on the lower end of the back film In addition, the lower part of the front film is folded in an M shape between the back film and the front film so that the front lower end position of the front film is the lower end position of the rear film (110). The front end seal portion (12) is formed by heat-sealing the joining surface of the inner surface and the inner surface of the surface film at the edge, and the surface film is folded. The joining surface between the inner surface of the rear lower edge and the lower edge of the back film is heat-sealed to form the rear lower seal part (12), and the inner surface of the left and right edges of the surface film and the left and right ends of the back film The mating surface with the edge, the mating surface between the inner surface and the inner surface of the front left and right edges of the surface film, the inner surface of the rear film left and right both edges and the mating surface of the left and right edges of the back film Are heat-sealed to form side end seal portions (11, 11, 11).

  In addition, a surface film and a back surface film are not restricted to the same structure film, You may use the film which has a different characteristic according to the intended purpose of a pouch.

  Further, as a method of bag making, for example, as shown in FIG. 2, a back film (200) having a size of two lines of pouch upper end butting in a direction perpendicular to the bag making direction (arrow) of the bag making line. ), And pouch lower portions (left and right end portions in the figure) of the surface film (100) having a size of two lines of the upper end of the pouch are folded on the back film to form a fold (110), and First, the lower end seal portion of the pouch is formed by thermal fusion, then the side end seal portion of the pouch is formed by thermal fusion, and the upper end of the pouch is cut (indicated by a two-dot chain line in the figure) Completing bag making.

(A) is explanatory drawing which shows the structure of the simple standing pouch of one Embodiment of this invention, (b) is the A-A 'sectional drawing. It is explanatory drawing which shows the example of bag making of one Embodiment of the simple standing pouch of this invention.

Explanation of symbols

10 …… Standing pouch 11 …… Side end seal part 12 …… Lower end seal part 100 …… Surface film 110 …… Folding 200 …… Back film

Claims (2)

  The rectangular surface film and the back film are overlapped, the left and right edge portions are heat-sealed to form side edge seal portions, and the lower end edge portions are heat-sealed to form the lower end seal portions. In the pouch, align the bottom edge of the surface film with the bottom edge of the back film, and place the lower part of the surface film between the back film and the surface film so that the front film folding front bottom position is the bottom edge position of the back film. The front film is folded to form a front lower end edge by heat-sealing the joining surface of the inner surface and inner surface of the surface film to form a front lower end seal part, and the inner surface of the rear lower end edge of the surface film and the rear film The mating surface with the lower edge of the film is heat-sealed to form the rear lower seal part, the mating surface of the inner surface of the left and right edges of the surface film and the right and left edges of the back film, Side edge seal by heat-sealing the inner surface of the inner and outer edges of the front and left and right edges of the film, and the inner surfaces of the rear and right and left edges of the surface film and the right and left edges of the back film. A simple standing pouch characterized in that when the contents are formed and the contents are stored, a square bottom that can stand independently is formed.   The simple standing pouch according to claim 1, wherein films having different characteristics are used for the front film and the back film.

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