JPH0769313A - Method for heat-seal-wrapping object having special shape - Google Patents

Abstract

PURPOSE:To obtain a method for wrapping an object having a special shape wherein a plane shape is a triangle without deformation or bend occurring at sharp parts of the object by respectively heat-sealing on a first part along a line in parallel to a fold line and on second parts outside both side ends. CONSTITUTION:A wrapping sheet material 1 is a heat-fusable plastic film and can be restored to a sheet with an appropriate elasticity. The sheet material 1 continuously has a first region 2 and a second region 3 via a fold line 4 and is folded along the fold line 4 so that an object H to be wrapped is interposed between the regions. On a first linear heat-sealed part 5 along a line in parallel to the fold line 4 and a pair of spot heat-sealed parts 6, 6 outside both side ends of the object H to regulate in a direction along the fold line 4, the first region 2 and the second region 3 is heat-sealed outside the ends of the object H, thereby regulating its movement, release, deformation and bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can easily heat a specially shaped object to be packaged, for example, a flat triangular object to be packaged, one by one, without deforming the angular portions. The present invention relates to a heat-sealing packaging method for a specially-shaped article to be packaged in which the packaging sheet material can be sealed and can function as a sheet as it is after being opened.

[0002]

2. Description of the Related Art A specially shaped object to be packaged in the present invention is, for example, a flat confectionery having a flat triangular shape as a specific example thereof. More specifically, this raw confectionery is composed of a rectangular sheet-shaped outer confectionery material and sandwich confectionery materials such as bean jam sandwiched inside. It is a sandwiched material, the planar shape is triangular,
It is made up of squared parts. Conventionally, in order to wrap the fresh confectionery in such a form one by one, the packaging sheet material requires extremely unreasonable paper removal in shape, and a complicated packaging method has been forced.

[0003]

Therefore, the present invention is
It is possible to wrap the specially shaped items as described above with excellent paper-saving and extremely labor-saving, and simply heat-seal one by one so that the angular parts are not deformed or bent. An object of the present invention is to provide a heat-sealing packaging method for an object to be packaged with a special shape, which is intended to be packaged and which can be used as a paper as it is as a packaging sheet material after opening.

[0004]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention specifically comprises a first region and a second region continuously through a single folding line, and has a proper degree. An object to be packaged is provided between the step of preparing one packaging sheet material made of a heat-welding film that can be elastically restored to a sheet shape, and the first region and the second region of the packaging sheet material. Folding the packaging sheet material along the folding line so as to be sandwiched, and heat-sealing step of heat-sealing the first region and the second region outside the edge of the packaged object, the heat-sealing process Then, a first heat seal portion along a line parallel to the folding line to regulate the packaging object in a direction intersecting the folding line, and the folding line to the packaging object. A heat-sealing packaging method for a specially-shaped article to be packaged, which is heat-sealed at a pair of second heat-sealing portions outside both side edges of the article to be regulated in the direction along the line. .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat-sealing packaging method for a specially shaped article to be packaged according to the present invention will be described in detail below with reference to specific examples shown in the drawings. FIG. 2 shows a specific embodiment of the specially-shaped object to be packaged H in the present invention. According to the embodiment example shown in FIG. 2, the article H to be packaged is a rectangular sheet-shaped outer confectionery material 21.
And a sandwich confectionery material 22 such as bean jam sandwiched inside, and a confectionery material 22 sandwiched inside by folding the outer confectionery material 21 along a diagonal line thereof. Opening edges 24, 2
4. It has a planar triangular shape having sharp-angled angular portions 25, 25 on both ends of the folding edge 23 and a substantially right-angled angular portion 26 sandwiched between a pair of opening edges 24, 24.

On the other hand, the packaging sheet material 1 applied to the heat-sealing packaging method for a specially-shaped article to be packaged according to the present invention has a proper elasticity and can be heat-welded to be restored to a sheet shape. Composed of plastic film. In this invention, the plastic film as the packaging sheet material 1 is preferably a biaxially oriented polypropylene film or a laminate of a biaxially oriented polypropylene film and a non-oriented polypropylene film. Further, the plastic film as the packaging sheet material 1 may be any one selected from other heat-welding plastic films. The packaging sheet material 1 is one that can be restored to a sheet shape with appropriate elasticity, and in that range, a thickness of 30 to 50 microns is preferable.

The packaging sheet material 1 is continuously provided with a first region 2 and a second region 3 via a single folding line 4. The planar shape of the packaging sheet material 1 is not limited in any way. For example, a corner portion may be cut as shown in FIG. 1A, or a phantom line in FIG. 1A. It may be rectangular as shown. In the heat-sealing packaging method for a specially-shaped packaged object according to the present invention, the packaging sheet material 1 is packaged between the first area 2 and the second area 3 of the packaging sheet material 1. It is folded along the folding line 4 so as to sandwich H, and is heat-sealed between the first region 2 and the second region 3 on the outside of the edge of the article to be packaged H. In this invention,
In this heat-sealing step, the first heat-sealing portion 5 along a line parallel to the folding line 4 and the article H to be wrapped are regulated so as to regulate the article H to be folded in a direction intersecting the folding line 4. In order to regulate in the direction along the folding line 4, heat is sealed at the pair of second heat seal portions 6, 6 outside the both side edges of the article to be packaged H, respectively.

In the present invention, the first heat-sealing portion 5 in the heat-sealing step is linear, and the pair of second heat-sealing portions 6, 6 is dot-shaped. That is, the first heat seal portion 5 is linearly formed in parallel along the folding line 4, and
Is regulated in the direction intersecting the folding line 4 with respect to its movement and separation. The pair of second heat seal portions 6,
6 is located at a position facing the pair of opening edges 24, 24 of the article to be packaged H, and regulates the movement and separation of the article to be packaged H in the direction along the folding line 4.

The article to be packaged H is packaged in the packaging sheet material 1 by the packaging sheet material 1 by heat-sealing the first heat-sealing portion 5 and the pair of second heat-sealing portions 6, 6. To be done. As shown in FIG. 1A, in this case, the article to be packaged H is in a state of being sandwiched between the first region 2 and the second region 3 of the packaging sheet material 1, and the folding line 4, the first line Although regulated by the heat-sealing portion 5 and the pair of second heat-sealing portions 6, 6, the acute angled portions 25, 25 of the article to be packaged H are not regulated at all, and lose their shape or bend. I don't have to worry.

On the other hand, in the present invention, when the package packaged as shown in FIG. 1A is opened, the portion at the point M in the package body is pulled to the left and right to form the first heat seal portion 5 and the pair. Second heat seal portion 6, 6 of
Release the bonded state of. In the present invention, since the heat sealing of the first heat seal portion 5 and the pair of second heat seal portions 6, 6 does not need to be so strong, the unsealing can be extremely labor-saving. In the present invention, since the packaging sheet material 1 is made of a plastic film having an appropriate elasticity, the packaging sheet material 1 after opening is shown in FIG.
It will be elastically restored as shown in, and will function as a backing sheet.

[0011]

According to the heat-sealing packaging method for a specially-shaped packaged article of the present invention having the above-mentioned structure, it is constituted by applying a packaging sheet material having an extremely simple structure and easy to manufacture. Therefore, it can be said that it is extremely advantageous in that it is easy to take paper, is suitable for mass production, and has high productivity and can be provided at low cost. Furthermore, according to the heat-sealing packaging method for a specially-shaped object to be packaged according to the present invention, heat-sealing packaging can be easily performed one by one without causing deformation or bending of the angular portion. Therefore, it can be said that the packaging treatment and the unsealing treatment can be performed extremely labor-saving, and that the packaging sheet material directly functions as a sheet after the unsealing, and thus can be said to be extremely effective and practical.

[Brief description of drawings]

FIG. 1A is a schematic plan view showing a state in which an object to be packaged is wrapped with a packaging sheet material according to the application of the heat-sealing packaging method for the object to be specially packaged according to the present invention. Yes, FIG. 1B is a schematic plan view showing a state in which the packaging sheet material functions as a sheet of paper when the packaging sheet material is opened.

FIG. 2 is a schematic plan view showing a specific example of an article to be packaged H.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging sheet material 2 1st area | region 3 2nd area | region 4 Folding line 5 1st heat-sealing part 6,6 A pair of 2nd heat-sealing part 21 Rectangular sheet-shaped outside confectionery material 22 Sandwich confectionery material, such as bean jam 23 Folding Edges 24, 24 Pair of Opening Edges 25, 25 Sharp Angled Area 26 Nearly Right Angled Area H Packaged Items

Claims (3)

[Claims] 1. A piece of packaging sheet made of a heat-welding film, which is continuously provided with a first region and a second region via a single folding line and can be restored to a sheet form with appropriate elasticity. A step of preparing a material, and folding the packaging sheet material along the folding line so as to sandwich the article to be packaged between the first area and the second area of the packaging sheet material, the first area And a heat-sealing step of heat-sealing between the second regions on the outer side of the edge of the packaged object, in the heat-sealing step, the folding line for restricting the packaged object in a direction intersecting the folding line. A first heat-sealing portion along a line parallel to the first heat-sealing portion, and a pair of second heat-sealing portions outside the both side edges of the packaged article so as to regulate the packaged article in a direction along the folding line.
A heat-sealing packaging method for a specially-shaped article to be packaged, characterized in that each of the heat-sealing portions is heat-sealed. 2. The packaging sheet material having a thickness of 30 to 5
The heat-sealing packaging method for a specially-shaped article to be packaged according to claim 1, wherein the biaxially oriented polypropylene film of about 0 micron is used. 3. The packaging material for a special shape according to claim 1, wherein a biaxially stretched polypropylene film and a non-stretched polypropylene film are bonded together as the packaging sheet material. Heat seal packaging method.