JP2001301773A - Commodity packaging bag and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a commodity packaging bag having only a few printed faces and also printed characters easy to read and to be manufactured economically and also provide a manufacturing method thereof. SOLUTION: The commodity packaging bag formed of a plastic film on which a tongue piece is formed on an upper edge opening of the bag and both side edges of the bag are heat fusion bonded is provided, and at least one face of the tongue piece is laminated with a plastic of same kind as that of the bag surface, and the tongue piece is heat fusion bonded on a laminated face of one film of the upper edge opening in the whole width direction of the bag, and when the tongue piece is folded back on the upper edge opening, a linear sealing pressure-sensitive bonding agent layer is formed all over the width direction of the bag on a position whereon the upper edge opening is overlapped with the tongue piece. Also the manufacturing method for the commodity packaging bag in which a pair of half-folded bag films with their openings not facing each other are placed on both sides of the tongue piece continuous film, the openings of the tongue piece film and the bag film are heat fusion bonded each other and then the bag films are fusion bonded and cut off by respective widths of the commodity packaging bag is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a product packaging bag and a method for producing the same. More specifically, the present invention relates to a product packaging bag that has a small number of printed surfaces, is easy to read printed characters, and can be economically manufactured, and a method for manufacturing the same.

[0002]

2. Description of the Related Art A gusset is folded at the bottom edge of a bag, and a tongue is provided at an opening at an upper edge. After storing the product, the tongue is folded back to seal the opening. The plastic film-made product packaging bags provided with are widely used for packaging foods and the like. In such a conventional plastic film packaging bag, a product name, a pattern, a description of use, an indication of components, a content, a manufacturer name, and the like are generally printed on the entire surface of the film. However, in the state where the product is stored, characters and products often overlap and it is difficult to read,
There is also a problem that the products stored inside are obstructed by printing and are difficult to observe from the outside. Further, when printing is performed on the entire surface of the plastic film, there is a problem that the printing area is increased and the printing cost is increased.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a product packaging bag which has a small number of printed surfaces, is easy to read printed characters, and can be economically manufactured, and a method for manufacturing the same. Things.

[0004]

The inventor of the present invention has conducted intensive studies in order to solve the above-mentioned problems. As a result, the tongue piece is provided at the upper edge opening of the bag to concentrate printing, and the bag is made plain. By doing so, it is easy to read the printed characters, it is easy to observe the stored goods, and it has been found that the printing area can be reduced and the printing cost can be reduced. It has been found that by mounting a pair of opposed half-folded bag films and heat-sealing the bag film and the tongue piece film, the above product packaging bag can be economically manufactured. Based on this finding, the present invention has been completed. That is, the present invention provides (1) a plastic film product packaging bag having a tongue piece at the upper edge opening of the bag body and both side edges of the bag body being heat-sealed, wherein at least one side of the tongue piece is the bag body. Laminated with the same kind of plastic as the surface, the tongue piece is heat-sealed on one side of the film of the upper edge opening over the entire width direction of the bag body on the lamination surface, and when the tongue piece is folded back to the upper edge opening, the upper edge opening A product packaging bag characterized in that a linear sealing pressure-sensitive adhesive layer is provided over the entire width direction of the bag at a position where the part and the tongue overlap, (2) a bottom edge of the bag; The product packaging bag according to claim 1, which has a V-shaped gusset fold, (3) the product packaging bag according to claim 1, wherein an inner surface of the bag is subjected to an anti-fog treatment,
(4) (A) A step of continuously feeding out two long plastic films for bags, folding each film in half, and arranging the half-folded films for bags so that the openings of the films are separated from each other. (B) a step of superposing one long tongue piece long plastic film on the opening of two facing half-folded bag films, and (C) an opening of the half-folded bag film. In the step of thermally welding the tongue film and the half-folded bag film linearly in the longitudinal direction of the film, (D) the tongue film at the opening of the half-folded bag film is A step of laminating a release tape having a pressure-sensitive adhesive layer on the side or the tongue film that is not heat-welded, (E) cutting the tongue film in the film longitudinal direction at the center line of the tongue film Process and (F) For each width of the product packaging bag, The method of manufacturing product packaging bag characterized by having thermal welding Lum, a step of cutting,
(5) (G) The method for manufacturing a product packaging bag according to claim 4, comprising a step of forming a V-shaped gusset fold at a folded portion of the bag film, (6) (A) Length of one bag. A step of continuously feeding a plastic film and folding it at one-quarter of the width of the film, (B) a step of cutting the film in the longitudinal direction at the center line of the bag film, and (C) cutting. Separating the separated bag film in the width direction, (D) in the separated portion of the cut bag film, one long tongue piece long plastic film is opposed to two separated bags. (E) heat-sealing the bag film separated from the tongue piece film linearly in the longitudinal direction of the film at the opening of the separated bag film. (F) separated Step tongues film openings on the side or tongue film not thermally welded, laminated a release tape having a pressure-sensitive adhesive layer of the-body film,
(G) a step of cutting the film for tongue in the longitudinal direction of the film at the center line of the film for tongue; and (H) a step of heat welding and cutting the film for each width of the product packaging bag. Characteristic product packaging bag manufacturing method, and
(7) (I) The method for producing a product packaging bag according to the item (6), further comprising the step of forming a V-shaped gusset fold at the folded portion of the bag film.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1A is a front view of one embodiment of the product packaging bag of the present invention, and FIG. 1B is a rear view thereof.
(c) is an end view of the cut portion. The product packaging bag of this embodiment has a tongue piece 2 at the upper edge opening 1 of the bag body, and both side surfaces 3 of the bag body are heat-welded. One side of the tongue piece is laminated with the same kind of plastic as the bag surface, and the tongue piece is thermally welded to one film 4 of the upper edge opening over the entire width direction of the bag body on the laminated surface to form a heat welding wire 5. Have been. When the tongue piece is folded back into the upper edge opening, a line is placed over the other film of the upper edge opening over the entire width direction of the bag at a position where the other film 6 and the tongue piece overlap with each other. A pressure-sensitive adhesive layer 7 for sealing is provided. The sealing pressure-sensitive adhesive layer is covered with a release film. A V-shaped gusset fold 8 is formed at the bottom edge of the bag. FIG. 2A is a front view of another embodiment of the product packaging bag of the present invention, FIG. 2B is a rear view thereof, and FIG. 2C is a sectional end view thereof. . In the product packaging bag of this embodiment, the linear pressure-sensitive adhesive layer 7 for sealing is positioned such that when the tongue piece 2 is folded back at the upper edge opening, the other film 6 of the upper edge opening and the tongue piece overlap. Only the point provided on the tongue piece is different from the product packaging bag of the embodiment shown in FIG.

[0006] In the commodity packaging bag of the present invention, the bag body is made plain,
It is preferred to print only on the tongue. By making the bag plain and printing only on the tongue, the product stored in the bag can be easily observed without being hindered by printing, and the characters printed on the tongue can be displayed on the product. The image can be read clearly without any hindrance. In the product packaging bag of the present invention, the tongue piece can be a tongue piece with synthetic paper. By making the tongue piece a tongue piece with synthetic paper, the appearance and handleability of the product packaging bag can be improved. In the commodity packaging bag of the present invention, it is preferable to perform an antifogging treatment on the inner surface of the bag. By performing the anti-fogging treatment on the inner surface of the bag, even if a product with a high moisture content is stored, the stored product can be easily observed without fogging on the inner surface of the bag. Although there is no particular limitation on the antifogging method, for example, 6 parts by weight of colloidal silica, 2 parts by weight of colloidal alumina, and 0.1 part by weight of an anionic surfactant are added to 100 parts by weight of water, and further required. The coating performance can be improved by adding a viscosity modifier according to the above, and the film can be coated on the film surface by spraying. In the product packaging bag of the present invention, at least one side of the tongue piece is laminated with the same type of plastic as the surface of the bag body, and on the laminated surface, one of the films at the upper edge opening of the bag body is heated over the entire width direction of the bag body. Welded. By using the same type of plastic for the laminated surface of the tongue and the surface of the bag, the tongue and the bag can be firmly heat-welded. The bag body is made of a plastic film without lamination, and the film for the bag body and the tongue piece can be made of the same kind of plastic, or the outer surface of the bag body and at least one side of the tongue piece are laminated with the same kind of plastic. You can also. When using the product packaging bag of the present invention, open the upper edge opening of the bag body to store the product, remove the release film covering the pressure-sensitive adhesive layer, and fold the tongue piece back at the upper edge opening. And sealing with a pressure-sensitive adhesive layer for sealing. If a V-shaped gusset fold is provided at the bottom edge of the bag body, the V-shaped gusset fold is opened to form a flat bottom, so that the product packaging bag is firmly self-supporting.

FIG. 3 is a process explanatory view of one embodiment of the method for producing a product packaging bag of the present invention. In this embodiment, (A) 2
The long plastic films 9 and 10 for bags are continuously fed, and the respective films are triangular plates 11 and 1.
2 and half-folded bag films 13 and 1
4 are arranged so that the openings thereof face each other. Also,
(B) A plastic film 16 of the same quality as the plastic film for the bag is laminated on one long plastic film 15 for the tongue piece, and is superimposed on the opening portions of the two facing half-folded bag films. (C) At the opening of the half-folded bag film, the tongue piece film and the half-folded bag film are straightened in the longitudinal direction of the film by the heat welding roll 17 and the seal receiving plate 18. Heat welding. (G) A V-shaped gusset fold is formed at the folded portion of the bag film by the gusset roller 19 and the gusset inner mold 20. (D) A release tape having a pressure-sensitive adhesive layer is laminated on the side of the opening of the half-folded bag film where the tongue film is not welded or on the tongue film.
(E) The tongue piece film is cut in the longitudinal direction of the film at the center line of the tongue piece film. (F) A film is thermally welded and cut for each width of the product packaging bag to complete the product packaging bag of the present invention. The thermal welding and cutting of the film can be performed separately in two steps, or the film can be thermally fused in one step. In the production method of this embodiment, the order of the steps (B) to (E) and (G) except for (A) half-folding of the bag film and (F) heat welding of the film and cutting can be interchanged, For example, a step of laminating a plastic film of the same quality as the bag film to the tongue piece film and a step of laminating a release tape having a pressure-sensitive adhesive layer are performed in separate steps, and a release tape having a pressure-sensitive adhesive layer is already laminated. The tongue piece film can be sent out and superimposed on the opening of the half-folded bag body film. Further, in the manufacturing method of this aspect, (E) a step of cutting the film for tongue in the longitudinal direction of the film at the center line of the film for tongue, and (F) heating the film for each width of the product packaging bag. The steps of welding and cutting can be reversed. That is, for each width of the product packaging bag, the film is heat-sealed and cut so that the two product packaging bags are connected by the tongue film, and then separated at the center line of the tongue film. .

FIG. 4 is an explanatory drawing showing the steps of another embodiment of the method for producing a product packaging bag according to the present invention. In this embodiment, (A)
One piece of the long plastic film 21 for the bag is continuously fed out and folded at the left and right quarter positions of the film width, and (B) the film is cut in the longitudinal direction at the center line of the film for the bag. (C) Separate the cut bag film in the width direction. Also, (D) a plastic film 23 of the same quality as the plastic film for the bag is laminated on one long plastic film 22 for the tongue piece, and at the separated portion of the cut film for the bag, the two facing sheets are separated. To the opening of the bag film. (E) At the opening of the separated bag film, the bag film separated from the tongue piece film by the heat welding roll 24 and the seal receiving plate 25,
Thermal welding is performed linearly in the longitudinal direction of the film. (I) A V-shaped gusset fold is formed at the folded portion of the bag film by the gusset roller 26 and the gusset inner mold 27.
(F) A release tape having a pressure-sensitive adhesive layer is laminated on the side of the opening of the separated bag film where the tongue film is not heat-welded or on the tongue film. (G) Cut the tongue piece film in the longitudinal direction of the film at the center line of the tongue piece film. (H) The film is thermally welded and cut for each width of the product packaging bag to complete the product packaging bag of the present invention. The thermal welding and cutting of the film can be performed separately in two steps, or the film can be thermally fused in one step. In the production method of this embodiment, the order of the steps (B) to (G) and (I) except for (A) the folding of the bag film and (H) the heat welding of the film and cutting can be interchanged. After the V-shaped gusset fold is formed at the folded portion of the bag film, the film can be cut in the longitudinal direction at the center line of the bag film.
Further, in the manufacturing method of this embodiment, (G) a step of cutting the tongue film in the longitudinal direction of the film at the center line of the tongue film, and (F) heat-treating the film for each width of the product packaging bag. The steps of welding and cutting can be reversed. That is, for each width of the product packaging bag, the film is heat-sealed and cut so that the two product packaging bags are connected by the tongue film, and then separated at the center line of the tongue film. . According to the method for manufacturing a product packaging bag of the present invention, a pair of left and right product packaging bags can be simultaneously manufactured in a single manufacturing line, so that a total of two product packaging bags can be manufactured. It can be manufactured economically.

[0009]

The product packaging bag of the present invention is printed only on the tongue piece film and heat-sealed with the bag body film.
It can be manufactured economically with a reduced printing area. Further, since the printing is concentrated on the tongue piece and the bag body is kept transparent, it is possible to easily read the printed characters and observe the stored goods. Further, according to the method for manufacturing a product packaging bag of the present invention, a pair of left and right product packaging bags can be simultaneously manufactured on a single manufacturing line, so that the manufacturing cost can be reduced. Product packaging bags can be manufactured economically.

[Brief description of the drawings]

FIG. 1 is a front view, a rear view, and a cut section end view of one embodiment of a product packaging bag of the present invention.

FIG. 2 is a front view, a rear view, and a cut section end view of another embodiment of the product packaging bag of the present invention.

FIG. 3 is a process explanatory view of one embodiment of the method for producing a product packaging bag of the present invention.

FIG. 4 is a process explanatory view of another embodiment of the method for producing a product packaging bag of the present invention.

[Explanation of symbols]

 Reference Signs List 1 upper edge opening 2 tongue piece 3 both sides 4 one film of upper edge opening 5 heat welding wire 6 the other film of upper edge opening 7 pressure-sensitive adhesive layer for sealing 8 V-shaped gusset fold 9 bag Long plastic film 10 Long plastic film for bags 11 Triangular plate 12 Triangular plate 13 Film for half-folded bag 14 Film for half-folded bag 15 Long plastic film for tongue 16 Plastic film 17 Heat welding roll 18 Seal receiving plate 19 Gazette roller 20 Gazette inner mold 21 Long plastic film for bag 22 Long plastic film for tongue piece 23 Plastic film 24 Heat welding roll 25 Seal receiving plate 26 Gazette roller 27 Gazette inner mold

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AB14 BA22 HM01 HN62 3E075 BA42 BA46 BA70 CA02 DA03 DA04 DA14 DC15 DC43 DC44 DC48 DD13 DD44 DD49 DE01 DE18 GA03 GA04

Claims (7)

[Claims] 1. A product packaging bag made of a plastic film having a tongue at the upper edge opening of the bag and heat-welded to both side edges of the bag, wherein at least one side of the tongue is the same as the surface of the bag. When the tongue piece is heat-welded on the laminated surface over the entire width direction of the bag body to one of the films in the upper edge opening, and the tongue piece is folded back into the upper edge opening, the upper edge opening and the tongue piece are laminated. Wherein a linear pressure-sensitive adhesive layer for sealing is provided over the entire width direction of the bag body at a position where the pressure-sensitive adhesive sheet overlaps with the bag. 2. The product packaging bag according to claim 1, wherein a V-shaped gusset fold is provided at a bottom edge of the bag body. 3. The product packaging bag according to claim 1, wherein an inner surface of the bag body is subjected to an anti-fog treatment. (A) Two long plastic films for a bag are continuously fed out, each film is folded in half, and the half-folded film for a bag is arranged so as to face away from each other. (B) a step of superposing one long tongue piece long plastic film on the opening of two facing half-folded bag films, and (C) a step of (C) forming a half-folded bag film. A step of heat-sealing the tongue piece film and the half-folded bag film linearly in the longitudinal direction of the film at the opening, (D) for the tongue piece at the opening part of the half-folded bag film Laminating a release tape having a pressure-sensitive adhesive layer on the side where the film is not heat-welded or on the tongue piece film, (E) placing the tongue piece film in the longitudinal direction of the film at the center line of the tongue piece film. Cutting and (F) quotient Each width of the packaging bag, the film heat welding method of product packaging bag characterized by having a step of cutting. (G) The folded portion of the bag film has a V
The method for manufacturing a product packaging bag according to claim 4, further comprising a step of forming a gusset fold. 6. A step of: (A) continuously feeding one long plastic film for a bag and folding it at one-fourth of the width of the film, and (B) a center line of the film for a bag. , A step of cutting the film in the longitudinal direction, (C) a step of separating the cut bag film in the width direction, and (D) a separating portion of the cut bag film. Superposing the long plastic film for use on the opening of two facing bag films facing each other, (E) the bag separated from the tongue piece film at the opening of the spaced bag film. (F) a step of linearly heat-welding the body film in the longitudinal direction of the film; (F) on the side of the opening of the separated bag-like film where the tongue film is not heat-welded or on the tongue film; Pressure sensitive adhesive Laminating a release tape having, at the center line of the (G) tongue piece film, cleaving the tongue piece film longitudinal direction of the film and,
(H) A method for producing a product packaging bag, comprising a step of thermally welding and cutting a film for each width of the product packaging bag. 7. A method according to claim 1, wherein:
The method for manufacturing a product packaging bag according to claim 6, further comprising a step of forming a gusset fold.