JP2018108858A - Trimming method for foamed polyethylene packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trimming method for a foamed polyethylene packaging material, in which a bag prepared by processing a laminate having a foamed polyethylene layer, filing it with a content and heat-sealing an opening part thereof can be trimmed in a beautiful appearance and a stable manner with a waste of the material being reduced.SOLUTION: A trimming method for a foamed polyethylene packaging material, characterized in processing a laminate having a foamed polyethylene layer in a rectangular shape to produce a bag forming an opening part remained in one direction, filing the bag with a content from the opening part, heat-sealing the opening part, and trimming an edge part of the side heat-sealed by means of a roll cutter 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging material trimming method. In particular, the present invention relates to a trimming method for a packaging material including a foamed polyethylene layer.

  Packaging materials consisting of laminates based on paper and plastic films are widely used in modern society, and various forms are used in a wide range of applications, and are essential for corporate activities and people's lives. It has become a thing.

  Pouches based on plastic films are used, for example, as packaging containers for liquids, and are widely used in the food field such as beverages and retort foods. The store shelves the store shelves and convenience store shelves.

  Alternatively, a packaging bag based on kraft paper, which has a foamed polyethylene layer inside the packaging bag and has a buffering function for protecting contents from impact or the like, is also known. In addition to the buffer function, such products have a certain level of water resistance and are resistant to a certain high temperature.

  The advantages of these pouches and packaging bags are that they are less expensive than cans, bottles, and other containers, can be handled with fine-grained material design depending on the required quality, and can be used before filling the contents and in distribution and storage. It is light and space-saving. Pouches and packaging bags are also environmentally adaptable from the viewpoint of reducing waste.

  In addition, high-definition printing on the layer visible from the surface can improve the image of the product and display necessary information about the contents. Bar code printing, etc. It is also a source of marketing information.

  On the other hand, in the case of a packaging bag that has a foamed polyethylene layer inside the packaging bag based on paper and has a buffer function to protect the contents from impact, etc., the bag is made and the contents After filling the material and sealing the opening with a heat seal, trimming of the mouth is generally performed, but the foam layer may melt and leak due to the heat sealing of the opening .

  This leakage of resin is a burr that protrudes from the edge and is unsightly in appearance, so trimming is necessary and it is improved as a problem that negatively affects productivity, such as adhesion of resin to the seal bar Is desired.

  Patent Document 1 proposes a method for forming a laminate having a foam layer, a method in which the heat-sealed portion is once crushed, cooled, and then cut, but in this method, the steps are complicated. In addition, there is a possibility that the resin of the foamed layer may leak out, which is not necessarily a sufficient measure.

Alternatively, in the heat seal portion of the opening, a method of taking a wider unsealed portion than the width of the leakage of the foam layer resin and trimming in a later process is conceivable, but a generally used die-cut trimming device is used. In some cases, a trimming margin of about 20 mm is required, which increases costs, and is not necessarily practical.

JP2013-193320A

  The present invention has been made in view of such a situation, making a laminate having a foam polyethylene layer, filling the contents, heat sealing the opening, and trimming afterwards beautifully in appearance, It is another object of the present invention to provide a trimming method for foamed polyethylene packaging material that can be carried out stably and with less waste of material.

  As means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a laminate having a foamed polyethylene layer is formed into a rectangular shape with one direction left as an opening, and the contents are filled from the opening. Then, the opening is heat-sealed, and the end of the heat-sealed side is trimmed by using a roll cutter.

  The invention according to claim 2 is the foamed polyethylene packaging material according to claim 1, wherein the packaging material is a three-sided bag made by heat-sealing three sides of a rectangle. This is a trimming method.

  In the invention according to claim 3, the trimming is performed continuously in this order after bag making of a laminate having a foamed polyethylene layer, filling of contents, and heat sealing of the opening in this order. The trimming method for foamed polyethylene packaging material according to claim 1 or 2, wherein trimming is performed.

  The invention according to claim 4 is the laminate according to any one of claims 1 to 3, wherein the laminate having the foamed polyethylene layer is a laminate based on paper. This is a trimming method for foamed polyethylene packaging material.

  According to the present invention, a laminate having a foamed polyethylene layer is formed, filled with contents, the opening is heat-sealed, and the subsequent trimming is beautiful in appearance and stable, and wastes material. It is possible to provide a trimming method for a foamed polyethylene packaging material which can be performed with less.

  In particular, according to the invention described in claim 2, a laminated body having a foamed polyethylene layer is made into a bag, the contents are filled, the opening is heat sealed, and the subsequent trimming is beautiful in appearance and stable. Thus, it is possible to provide a trimming method for foamed polyethylene packaging material, which can be performed with less waste of material, as part of a more efficient manufacturing method using three-sided bags.

  In particular, according to the invention described in claim 3, a laminated body having a foamed polyethylene layer is formed, filled with contents, the opening is heat sealed, and the subsequent trimming is beautiful in appearance and stable. By providing a trimming method for foamed polyethylene packaging material that can be performed with less material waste as part of a continuous process, it is possible to provide a more efficient manufacturing method.

  According to the present invention, using a paper as a base material, a laminated body having a foamed polyethylene layer is formed, filled with contents, the opening is heat sealed, and the subsequent trimming is beautiful in appearance and stable. Thus, it is possible to provide a trimming method for foamed polyethylene packaging material which can be performed with less waste of material.

FIG. 1 is a schematic view of an example of a manufacturing apparatus for explaining a trimming method for a foamed polyethylene packaging material according to the present invention. FIG. 2 is a partial cross-sectional schematic view for explaining one embodiment of the configuration of the laminate according to the trimming method of the foamed polyethylene packaging material according to the present invention.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the examples shown here. The invention is limited only by the following claims.

  FIG. 1 is a schematic view of an example of a manufacturing apparatus for explaining a trimming method for a foamed polyethylene packaging material according to the present invention.

  In an example of the manufacturing apparatus (100) shown here, a laminate for constituting a packaging material is supplied as a raw fabric (1), and folded (2), side seal (3), cut (4), and affixed with a label. (5) The contents filling (6), the top seal (7), the trimming (8), and the discharging (9) are arranged so that they can be performed continuously.

  In the present invention, the raw fabric (1) is a laminate having a foamed polyethylene layer. The laminate may be made of, for example, a plastic film or the like, or may be made of paper.

  The laminate can also be provided with a sealant layer on the surface that contacts the packaging bag interior for bag making. The sealant layer may be a foamed polyethylene layer of a laminate.

  The supplied original fabric (1) is sent to the manufacturing apparatus (100) by the rotating roll (11), and folding (2) is performed. In the example shown here, the folds (2) can be overlapped with the inner surfaces of the packaging material facing each other by passing between the two cylindrical rolls (12).

  By this folding (2), the rectangular base of the packaging material is formed by folding the original fabric. Therefore, in the example shown here, it is an example of the three-sided bag making formed by heat-sealing three sides of the rectangle. As another example of bag making, for example, four sides of a rectangular peripheral portion may be heat-sealed to form a packaging material.

  The raw material overlapped by the folding (2) is side-sealed (3), and both left and right ends are closed. The side seal (3) is performed by sandwiching between two seal bars shown in the figure. Further, a cut (4) for separating the heat seal portions at both ends is performed, and individual rectangular packaging materials (10) are obtained.

  At this stage, the upper end of the packaging material has not yet been heat-sealed, and one side of the rectangle is an opening.

  Subsequently, labeling (5) can be performed as necessary. Label sticking (5) can also be performed using an automatic sticking machine. Subsequent to labeling (5), filling of the contents (6) is performed from the aforementioned opening. The method of emphasis may be determined according to the type of contents and the required quality, and manual filling may be used or an automatic filling machine may be used.

  Following the filling, a top seal (7) is performed. The top seal (7) can be performed by heat sealing with two seal bars. As a result, the packaging material (10) is sealed.

  The packaging material (10) that has passed through the top seal (7) is then trimmed at the upper end by trimming (8). In the present invention, trimming (8) is performed using a roll cutter (13).

  By trimming using the roll cutter (13), it is possible to provide a trimming method for foamed polyethylene packaging material, which is beautiful in appearance and stable, and can be performed with less waste of material.

  In particular, in the case of using a generally used die-cut trimming apparatus for trimming (8), a trimming margin (margin) of about 20 mm is required, resulting in an increase in cost. Therefore, the trimming method for foamed polyethylene packaging material according to the present invention is effective because it directly relates to reducing waste of material.

  After trimming (8) is performed, the packaging material (10) is discharged (9) out of the manufacturing apparatus (100).

  FIG. 2 is a partial cross-sectional schematic view for explaining one embodiment of the configuration of the laminate according to the trimming method of the foamed polyethylene packaging material according to the present invention.

  In the example shown here, the laminate (20) is a sheet-like base material (23) and a foamed polyethylene layer laminated on one surface of the base material (3) via an adhesive layer (25). (27) and a sealant layer (29) laminated on one surface of the foamed polyethylene layer (27).

  Here, the base material (23) may be, for example, a plastic film or paper. The plastic film is a film made of a polymer resin composition. For example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), polyimide Etc. can be used, and is appropriately selected according to the application. In particular, when polypropylene or polyethylene terephthalate is used as a base film, it is more preferable in terms of film strength and price.

  When the substrate (23) is paper, there is no particular limitation on the material and type in the present invention, but for example, when craft paper is used, it is preferable from the viewpoint of strength and content protection. Can be used.

In addition, as a material for the sealant layer, a polyolefin-based resin is generally used among thermoplastic resins, and specifically, a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), and a linear low density. Ethylene resins such as polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer, blend resin of polyethylene and polybutene, and homo Polypropylene resins such as polypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α olefin copolymer can be used.

  The laminated body having such a structure is supplied as a raw fabric (1) to the manufacturing apparatus (100) shown in FIG. 1 to form a packaging material (10), and the method for trimming foamed polyethylene packaging material according to the present invention is applied. Can be applied.

  In this way, a laminate having a foam polyethylene layer is made into a bag, filled with the contents, the opening is heat sealed, and the subsequent trimming is beautiful in appearance and stable and wastes material. It is possible to provide a trimming method for a foamed polyethylene packaging material which can be performed with less.

DESCRIPTION OF SYMBOLS 1 ... Original fabric 2 ... Folding 3 ... Side seal 4 ... Cut 5 ... Label sticking 6 ... Contents filling 7 ... Top seal 8 ... Trimming 9 ... Discharge 10 ... packaging material 11 ... rotating roll 12 ... cylindrical roll 13 ... roll cutter 20 ... laminate 23 ... substrate 25 ... adhesive layer 27 ... foamed polyethylene layer 29 ... Sealant layer 100 ... Manufacturing equipment

Claims (4)

  The laminated body having the foamed polyethylene layer is made into a rectangular bag leaving one direction as an opening, and after filling the contents from the opening, the opening is heat-sealed, and the end of the heat-sealed side is A trimming method for foamed polyethylene packaging material, wherein trimming is performed using a roll cutter.   The method for trimming a foamed polyethylene packaging material according to claim 1, wherein the packaging material is a three-sided bag made by heat-sealing three sides of a rectangle.   The trimming is characterized in that after the bag making of a laminate having a foamed polyethylene layer, filling of contents, and heat sealing of an opening portion are successively performed in this order, trimming is further continuously performed. The trimming method of the foaming polyethylene packaging material of Claim 1 or Claim 2.   The method for trimming a foamed polyethylene packaging material according to any one of claims 1 to 3, wherein the laminate having the foamed polyethylene layer is a paper-based laminate.