JP3126784U - Plastic film bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a bag body using a thin synthetic resin film for reducing the amount of plastic waste, the two front and back film surfaces are in close contact with each other and are difficult to open during use. Provided is a synthetic resin film bag that can solve such problems and can be manufactured at low cost.
SOLUTION: A long synthetic resin film 101 is unwound from a roll 100, and in the transfer path, a gusset is folded, a heat seal 105 on the right and left side edges or bottom edge of a bag body, a hanging protrusion 6 and a binding piece. The cutting process 106, the punching process 108, and the like for forming the projecting pieces are performed in a desired order as necessary to form the synthetic resin film bag 1e having a desired shape. During the molding (in the transfer path), a predetermined portion of the long synthetic resin film 101 is partially embossed.
[Selection] Figure 2

Description

  The present invention relates to a bag made of a synthetic resin film, for example, a bag made of a synthetic resin film used as a plastic bag, a plastic bag, a garbage bag, or the like.

  In recent years, bags made of synthetic resin films such as polyethylene, polypropylene, and polyvinyl chloride have been used for various applications such as plastic bags, plastic bags, and garbage bags. For example, as disclosed in Patent Documents 1 to 3 and the like, this seed bag body has various structures such as a gusset, a hanging protrusion, a bundling protrusion, and the like. .

Moreover, this seed bag body is normally shape | molded piece by piece in the transfer path | route of a long synthetic resin film so that it may be disclosed by the said patent document etc.
Specifically, a long synthetic resin film wound in a roll shape is unwound from the roll, and in its transfer path, gusset folding, heat sealing of the left and right side edges or bottom edge of the bag body, Cutting, punching, and the like for forming the bundling protrusions are performed in a desired order as necessary.
As a long synthetic resin film, a so-called tube film formed in a tube shape in advance is often used as a raw material in order to omit the heat sealing step of the left and right side edges of the bag body in the transfer path. .
In addition, as the raw material, a material that has been subjected to printing or embossing as necessary is usually used.

Japanese Patent Laid-Open No. 10-249960 JP 2004-67139 A JP 2006-44709 A

However, in response to the recent deterioration of the global environment, this type of synthetic resin film bag has also been made thinner in order to cope with the reduction in plastic waste. For example, in plastic bags, the thickness is 25 μm or less. Molded with synthetic resin film.
However, this kind of synthetic resin film bag is originally poor in opening because the front and back film surfaces constituting the bag body are in close contact with each other due to self-adhesion, and as described above, if the thickness of the synthetic resin film is thin, The aperture is further deteriorated due to the influence of the above.

  In order to solve such a problem, for example, Patent Document 2 discloses that embossing is performed on both surfaces of the synthetic resin film. However, when an embossed film is used on the entire surface, not only the cost of the film is increased due to the embossing, but there is a problem that the printing applied to the film is difficult to see and the aesthetics are lowered.

  Therefore, it is conceivable to partially emboss the synthetic resin film. However, as described in Patent Document 2, the embossing 200 is usually performed on the entire surface of the long film 201 using an embossing roll 202 (see FIG. 3). It is not easy to partially emboss the film. Furthermore, in view of the relationship with each processing step in the subsequent transfer path (see paragraph 0003), a desired location in the transfer path described above using a long film that has been partially embossed in advance. It is not easy to form a bag body that has been embossed.

  The present invention has been made in view of such conventional circumstances, the purpose of which is the disadvantage of forming a bag body using a thin synthetic resin film for the reduction of plastic waste, The object is to eliminate the disadvantage that the two front and back film surfaces are in close contact and difficult to open during use. Another object of the present invention is to provide a synthetic resin film bag that is partially embossed and can be manufactured at low cost.

In order to achieve the above object, a synthetic resin film bag according to the present invention is a synthetic resin film bag consisting of at least two front and back film surfaces, and covers the entire length of the opening edge of the bag body or partially. Further, it is characterized by being embossed.
The synthetic resin film bag according to the present invention has a hanging protrusion on the left and right sides in the bag width direction at the opening edge, a bundling protrusion at the center in the bag width direction at the opening edge, Any of those provided with gussets on the left and right side edges or bottom edges of the body, those not provided with these, and those provided with any one or more may be used.
That is, according to the present invention, the portion corresponding to the opening edge of the bag body is embossed over the entire length of the opening edge or partially, and the opening property of the bag body is improved by the embossing. For example, the shape and structure of the bag itself are not particularly limited.

However, as disclosed in Patent Document 2, it is needless to say that the surface of the synthetic resin film constituting the bag body is not subject to the present invention.
Thus, embossing is performed only on a portion (opening edge) necessary for improving the opening property, so that it is possible to clearly print on a portion where the embossing is not performed.
Moreover, since the openability is improved by embossing provided at the opening edge, it can be provided as a bag made of a synthetic resin film having a thickness of 25 μm or less, preferably 5 to 20 μm.

Using a long synthetic resin film, in the transfer path, folding of the gusset, heat sealing of the right and left side edges or bottom edge of the bag body, cutting processing for forming hanging protrusions and binding protrusions It is preferable to perform the embossing in the transfer path when forming a synthetic resin film bag having a desired shape by performing punching or the like in a desired order as necessary.
That is, a preferred synthetic resin film bag according to the present invention is a synthetic resin film bag formed one by one from the synthetic resin film in a long synthetic resin film transfer path, wherein the embossing is performed. It is a synthetic resin film bag made in the transfer path. Embossing can be applied to both or one of the two front and back film surfaces.

  A synthetic resin film bag formed one by one from the synthetic resin film in a long synthetic resin film transfer path, and made of a synthetic resin film partially embossed in the transfer path In the case of a bag, embossing can be applied to a portion other than the opening edge to form a pattern.

  The synthetic resin film bag according to the present invention can be used for plastic bags, plastic bags, garbage bags, and other various uses.

  As described in detail above, according to the present invention, the embossing is applied to the opening edge of the bag body, so that even if the bag body is formed using a thin synthetic resin film for reducing plastic waste, Can be improved. In addition, it is possible to clearly print on a portion not subjected to embossing, and to provide a product having excellent aesthetics.

  Moreover, it is a synthetic resin film bag that is molded one by one in the long synthetic resin film transfer path, and when embossing is performed in the transfer path, it can be partially manufactured at low cost. Since it becomes possible to provide a synthetic resin film bag having an embossed surface, the above-described effects can be made more effective. Furthermore, it provides many effects, such as providing a new synthetic resin film bag in which a part of the area other than the opening edge is partially embossed.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a front view showing an example of an embodiment of a synthetic resin film bag according to the present invention. Each of the bags 1a, 1b, 1c, 1d is a synthetic resin film comprising at least two front and back film surfaces. It is bag making, Comprising: The embossing 2 is given over the full length of the opening edge in each bag body 1a-1d, or partially.

  That is, the synthetic resin film bag shown in FIG. 1A has two front and back film surfaces in which there is no gusset on both the left and right side edges and the bottom edge in the bag width direction, and the bottom edge 3 is heat-sealed. The embossing 2 is given over the full length of the opening edge 4 of the upper edge. For example, as disclosed in Patent Document 2, the bag 1a is placed in a supermarket cash register or the like as a long roll product in which an opening edge and a bottom edge are connected with perforations, and puts vegetables or the like. It can also be provided as a plastic bag.

The synthetic resin film bag shown in FIG. 1 (b) is a bag body 1b composed of two front and back film surfaces having gussets 5 on the left and right side edges in the bag width direction and heat sealing the bottom edge 3. The embossing 2 is applied over the entire length of the opening edge 4 at the upper edge. Moreover, this bag 1b is
Suspension protrusions 6 and 6 are provided on both the left and right sides in the width direction of the bag body at the opening edge 4. For example, as disclosed in Patent Documents 1 and 3, so-called plastic bags such as supermarkets and convenience stores, or Mainly used as garbage bags.
Further, the bag body 1b is provided with a print 7 at a portion where the embossing 2 is not performed on one or both of the two front and back film surfaces.

  The synthetic resin film bag shown in FIG. 1 (c) is a bag body 1c composed of two front and back film surfaces having gussets 5 on the left and right side edges in the bag width direction and heat sealing the bottom edge 3. The opening edge 4 is provided with hanging protrusions 6 and 6 on both the left and right sides in the bag body width direction, and the binding protrusion 8 is provided at the center of the opening edge 4 in the bag body width direction. By embossing 2 on the upper portion (tip portion) of the piece 8, the opening edge 4 is partially embossed. In addition, this bag 1c is also printed 7 on one or both of the two front and back film surfaces where embossing 2 is not applied. Mainly used as a bag.

  The synthetic resin film bag shown in FIG. 1 (d) is a bag body 1d composed of two front and back film surfaces having gussets 5 on the left and right side edges in the bag width direction and heat sealing the bottom edge 3. The opening edge 4 is provided with hanging protrusions 6 and 6 on both the left and right sides in the bag body width direction, and the binding protrusion 8 is provided at the center of the opening edge 4 in the bag body width direction. Embossing 2 is performed on the entire surface of the piece 8, a part of the opening edge 4, and the opening edges of the hanging projection pieces 6, 6, so that the opening edge 4 is partially embossed. . In addition, this bag 1d is also provided with printing 7 on either one or both of the front and back film surfaces where embossing 2 is not applied. Mainly used as a bag.

FIG. 2 shows an example of a method for producing a synthetic resin film bag according to the present invention.
In the figure, reference numeral 100 denotes a roll obtained by winding a long tube film 101 made of synthetic resin that has been printed 7 at predetermined intervals in advance. In the transfer path of the tube film 101 fed out from this roll, Then, the print 7 is detected by the photoelectric sensor 102, and position information for performing the embossing 2 at predetermined intervals is detected.
The means for embossing 2 on the tube film 101 includes an upper mold 103 and a lower mold 104 that move up and down in time in response to a command from a control unit (not shown). Based on the command from the control unit, each moves up and down, and embossing (unevenness processing) 2 is performed on a predetermined portion of the tube film 101.
After the embossing 2 is performed, the sealer 105 is lowered by a command from the control unit to heat-seal the bottom edge 3 portion, and then the cutter 106 is lowered by a command from the control unit to lower the top edge portion and the bottom. The edge portions are cut, separated from the tube film 101 as individual bag-like bodies (semi-finished products) 1e ′, and loaded on the stage 107.
When these steps are sequentially performed and a predetermined number of bag-like bodies 1e ′ are stacked on the stage 107, the bundle of bag-like bodies 1e ′ is manually or automatically placed on the stage 109 at the punching position. Transport.
Then, the punching die 108 is lowered automatically or manually by a command from the control unit, and a predetermined number of bag bodies 1e in which the hanging protrusions 6 and 6 are punched at a time are completed.

The bag body 1e of this example is composed of two front and back film surfaces without a gusset and heat-sealed at the bottom edge 3, and is provided with suspension protrusions on the left and right sides of the opening edge 4 in the width direction of the bag body. It is provided with the pieces 6 and 6, and is embossed 2 from the opening edge 4 to the inner edges of the left and right hanging protrusions 6 and 6, and is partially or entirely embossed with respect to the opening edge 4 It becomes the applied mode.
Further, in this example, the upper mold 103 and the lower mold 104 can be embossed simultaneously on both the front and back film surfaces of the bag body 1e by the vertical movement of the upper mold 103 and the lower mold 104. Only one of them may be used, and only one of the two front and back film surfaces may be embossed.

  As mentioned above, the shape of the bag (such as the presence or absence of gussets, hanging protrusions, bundling protrusions, etc.), the presence or absence of printing, and the position to be embossed (uneven) are not necessarily limited. Various modifications can be made within the scope of the technical idea described in the claims of registration. Also, the bag manufacturing method is not limited to that shown in FIG. 2, and the shape of the bag (such as the presence or absence of gussets, hanging protrusions, binding protrusions, etc.), presence or absence of printing, embossing (unevenness) Needless to say, the position is appropriately changed according to the position where the mark is applied.

Moreover, although the thickness of a synthetic resin film is not necessarily limited, the bag 1a shown to Fig.1 (a) is used as a plastic bag which puts vegetables etc. as a long roll-shaped product connected with the perforation. When providing, it is preferable to shape | mold using a film about 5-8 micrometers in thickness.
Other bag bodies 1b to 1e shown in FIGS. 1 and 2 are mainly used as shopping bags and garbage bags, and are preferably formed using a film having a thickness of about 10 to 20 μm.

The front view which shows several examples of embodiment of the synthetic resin film bag making based on this invention. It is the schematic which shows an example of the manufacturing process of the synthetic resin film bag manufacturing which concerns on this invention, (a) represents a side view, (b) represents a top view. The perspective view which shows the manufacturing process of the synthetic resin film by which embossing was given to the whole surface.

Explanation of symbols

1a-1e: Bag body 2: Embossing (unevenness)
3: Bottom edge (heat seal)
4: Opening edge 5: Gazette 6: Hanging protrusion 7: Printing 8: Bundling protrusion 101: Tube film (long synthetic resin film)
103: Upper die for embossing (unevenness processing) 104: Lower die for embossing (unevenness processing) 105: Sealer 106: Cutter 107: Stage at stacking position 108: Punching die 109: Stage at punching position

Claims (10)

  A synthetic resin film bag made of at least two front and back film surfaces, which is embossed over the entire length of the opening edge of the bag body or partially.   The synthetic resin film bag according to claim 1, further comprising hanging protrusions on the left and right sides of the opening edge in the bag width direction.   3. The synthetic resin film bag according to claim 1, further comprising a bundling protrusion at the center of the opening edge in the bag width direction.   The synthetic resin film bag according to claim 3, wherein the embossing is applied at least to the bundling protrusion.   The synthetic resin film bag according to any one of claims 1 to 4, wherein printing is performed on a portion that has not been embossed.   The synthetic resin film bag according to any one of claims 1 to 5, wherein the thickness of the synthetic resin film is in the range of 5 to 20 µm.   The synthetic resin film bag according to any one of claims 1 to 6, which is a bag body with a gusset provided with gussets on left and right side edges or bottom edges of the front and back film surfaces.   A synthetic resin film bag formed one by one from the synthetic resin film in a long synthetic resin film transfer path, and made of a synthetic resin film partially embossed in the transfer path bag.   The synthetic resin film bag according to claim 8, wherein the embossing is performed on both or one of the two front and back film surfaces.   The synthetic resin film bag according to any one of claims 1 to 9, which is used as a plastic bag, a plastic bag, or a garbage bag.

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