JPH01153441A - Manufacture of commodity packing bag provided with label - Google Patents

Abstract

PURPOSE:To efficiently manufacture a commodity packing bag provided with a label, by cutting a thick label sheet into a predetermined shape of the label with a heated edge on an outer separating plate which is inserted between the thick label sheet and the upper plastic film and thereafter cutting off the side edge of a bag. CONSTITUTION:A long size thick label-sheet 1 is disposed on long size half-folded laminated thin plastic films 2, 3, and fed into a heat sealing stand. A plate 4 for separating inside is inserted into the laminated plastic films 2, 3, and a hot iron is continuously pressed on the plate 4 from the upper part of the lower edge part of the label sheet, thereby performing fuse-bonding. When the continuous composite bandlike material thus fuse-bonded is fed to a fuse-cut processing stand, an outer separating plate 7 is inserted inbetween. In the bag forming process, the operation is changed over to an intermittent piece-feeding mode, where a label print pattern or a photoelectric mark is detected by a phototube. Position alignment for the label sheet is performed, and the travelling of the continuous composite bandlike material is stopped. Whereby, the desired labels are formed by the hot fuse-cutting blade into the predetermined shapes from above.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing labeled product packaging bags. In particular, the present invention relates to a product packaging bag in which the label is located on the side of the package and is provided so as to be able to stand upright, which is effective in advertising the packaged product.

[Prior Art] Conventionally, in the case of product packaging bags, a label or header for displaying the contents is usually provided at the top end of the bag body.

Providing a label or the like on the middle side of the bag body requires a complicated structure and makes continuous bag making difficult, so it has not been put to practical use and has not appeared on the market.

However, for example, when packaging horizontally long products such as ham,
A label indicating this is required to be attached to the center of the bag body of the product packaging bag.

[Problems to be Solved by the Invention] The present invention provides an efficient method for manufacturing a product packaging bag having a label on the middle side of the bag body.

[Means for Solving the Problems] As a result of intensive research into a manufacturing method using a continuous bag-making process for product packaging bags having a label on the side of the bag body portion of the structure, the present inventor has developed a fused separation plate. By effectively utilizing
I came up with the idea that the desired continuous bag making could be carried out efficiently and completed the present invention.

That is, in the present invention, a long polymerized thin plastic film for bags and a long thick label sheet for labels are simultaneously sent to a heat-sealing stage, and the upper surface of the polymerized plastic film is The middle part of the plastic film and the edge part of the thick label sheet are heat-sealed and fused on an internal separation plate inserted between the polymerized films, and then sent onto a fusing and cutting stage. Then, the thick label sheet is melted into a predetermined label shape on the external separation plate inserted between the thick label sheet and the top plastic film, and then the side edges of the bag are melted and cut. A method for manufacturing a labeled product packaging bag characterized by feeding it to a table and fusing and cutting the side edges, a thin plastic film for a long polymerized bag body, and a thick label sheet for a long label. A laminated sheet consisting of a thick plastic sheet laminated with a thin plastic film, in which the lower edge of the thick plastic sheet is concave at the center along the width of the bag body, is placed on a heat sealing process bench at the same time. send it out,
Of the polymerized plastic film, the middle part of the top plastic film and the edge part of the thin plastic film laminated to the thick label sheet are placed on an internal separation plate inserted between the polymerized films. The thick label sheet is heat-sealed and fused, and then sent onto a fusing and cutting process table, and the central part of the thick label sheet is detected by means such as a phototube, and the thick label sheet is placed on the fusing and cutting process table. After locating the center of
The thick plastic sheet is cut into a predetermined label shape on an external separating plate inserted between the thick plastic sheet and the top plastic film, and then cut on a cutting table on the side edge of the bag. This method consists of a method for manufacturing a labeled product packaging bag, which is characterized by carrying out feeding and fusing and cutting the side edges.

The manufacturing process of the present invention will be explained in detail with reference to drawings of examples.

The long polymerized thin plastic film used as a raw material in the present invention can be a continuous sheet of thermoplastic plastic film folded in half.

A heat-shrinkable film can be used as the thin plastic film used in the present invention.

In addition, when using the product packaging bag of the present invention as a food packaging bag, a film with oxygen barrier performance such as polyamide resin, saponified ethylene-vinyl acetate copolymer resin, vinylidene chloride resin, and a film with heat seal performance are used. Laminated products and heat-shrinkable films thereof can be suitably used.

Furthermore, when used for packaging ham, etc., it is preferably boiled for a long time in the heat sterilization process, so a film laminated with a heat-resistant resin film such as polyester resin or polyamide resin on the outside can be suitably used.

Furthermore, in the case of such food packaging, the airtightness of the heat-sealed portion is a problem, so in the production of product packaging bags, it is necessary to widen the width of the heat-sealed portion and fuse it.

This bag body film is usually not printed because it is difficult to synchronize with label printing, but in some cases, it may be printed on the back or front, such as with a continuous pattern of flowers. can.

The long thick label sheet, which is another raw material used in the present invention, may be a simple thick plastic sheet or a laminated sheet in which a thin plastic film is laminated on one or both sides of a thick plastic sheet or paper sheet. can.

It is preferable to use these laminated sheets because heat rolling with the bag film is easy.

However, even when using a thick single-layer plastic sheet, one made of the same or similar resin as the bag body and whose lower edge is thinned by hot rolling can be suitably used.

The thin plastic film used for the label sheet is preferably made of the same resin as the film for the bag body. However, when a heat-shrinkable film is used for the bag, it is desirable to use a resin that does not have heat-shrinkable properties even if it is the same resin.

This thick label sheet is usually printed with characters or patterns. The printing can be applied either to thick plastic or paper sheets or to laminated plastic films.

In some cases, a separately printed label may be attached to the label sheet section using an adhesive after the product packaging bag is manufactured without printing.

A folding structure can be provided approximately on the center line of the upper and lower edges of the thick label sheet used in the present invention.

If such a type of thick label sheet is used, the label can be folded to stand up on the surface of the package with the upper edge shaped like a triangle, as shown in FIG. At this time, the upright state can be further ensured by clipping or stapling near the top of the triangle, or by fixing the upper edge to the package with adhesive tape. .

For example, in a two- or three-layer laminated sheet of a thick plastic sheet and a thin plastic film, the folding structure can be easily folded by separating the thick plastic sheet on the center line. structure can be realized.

In this way, since there is only a thin film on the center line, it can be easily folded here. Any structure can be used as long as it can be bent near the center line by any method.

Another folding structure is to laminate a thick plastic sheet to only the top half of the label, leaving the bottom half a single layer of thin film.

As shown in Figure 1O, the elasticity of the warp of the thick plastic sheet in the upper half is suppressed and balanced by the tension of the thin film, and the tip of the thick sheet digs into the top surface of the package, ensuring that the label is firmly attached. I will stand.

In addition, the label material has excellent hinge performance.
For example, a polypropylene resin sheet can be provided with a bending groove, which can be bent as a hinge.

In this way, when applying a folding structure, it is desirable that the width above the folding line of the label portion is longer than the lower half.

By increasing the width of the upper half, the label can be made to stand up without using adhesive, using the label's warp repulsion as described above.

In this way, to utilize the elasticity of the sheet, a strong sheet is suitable; for example, a sheet made of a thick paper sheet laminated with a plastic film is suitable.

On the other hand, as the laminated sheet used in the second invention, a thick plastic sheet 1 used for the laminated sheet or a paper sheet whose lower edge has a concave edge in the center on the width of the bag body part is used. can do.

That is, as shown in Section 6, for example, a bag having an arcuate edge on the width portion can be used.

When such a laminated sheet in which a thin plastic film is laminated on at least one side of a thick plastic sheet or paper sheet is used, the result is a product packaging bag of the present invention in which the concave part of the label is located in the center as shown in Figure 7. Can be manufactured.

In the present invention, if the top of the item is convex, it is difficult to make a thick label with a straight lower edge vertical.

In such a case, it is necessary to make the thick plastic sheet concave to match the shape of the product as described above.

Even if the top surface of the item is not convex, when storing a prismatic item such as a square ham, the lower edge of the item should be linearly concave with only both ends protruding, as shown in Figure 9. If the width of the label is slightly larger than the width of the square-shaped product, for example, in the case of a square-shaped sausage, the label will easily stand upright.

As described above, in the present invention, if the shape of the concave portion at the lower edge of the thick plastic sheet portion of the laminated label is appropriately selected depending on the product, packaging can be performed with the label standing upright.

The manufacturing method of the present invention is a continuous bag-making process, and the raw material is a continuous supply of a long plastic film or plastic sheet.

Therefore, these steps can be expressed in vertical cross-sections to the flow of such continuous sheets.

In the embodiment shown in Fig. 1, a thick label sheet is obtained by laminating a thin plastic film folded in half on both sides of a thick plastic sheet, and fixing the film by heat sealing at the other edge of the thick plastic sheet. A thin plastic film is slightly extended from the heat-sealed portion to serve as the lower edge for heat-sealing with the bag body.

In the manufacturing method of the first aspect of the present invention, first, a long thick label sheet 1 is placed on a long half-folded thin plastic film 1.2 so as to have the cross-sectional structure shown in FIG. and feed it onto the heat sealing process table.

On the heat-sealing table, an internal separating plate 4 is inserted between the half-folded polymeric films 1 and 2.

The internal separation plate is inserted from the open side of the bag, and its end is fixed in alignment with the heat sheet.

A hot iron is continuously pressed against the internal separation plate 4 from above the lower edge of the label sheet to fuse the label sheet.

As the heat sealing method used in the present invention, known methods such as high frequency heat sealing can be appropriately used.

The composite continuous strips fused together are then fed onto a fusing and cutting stage.

An external separation plate 7 is inserted into the process bench. This external separation plate 7 is inserted from the right side when the upper edge of the label sheet is turned to the right.

From here on, we switch to intermittent frame-by-frame feeding, which is the usual method in the bag-making process. The printed label pattern or photoelectric mark is detected by a phototube, the label sheet is positioned to match the fusing position of the fusing thermal power, and the composite continuous band is stopped. Then, a label is formed by fusing and cutting it into a predetermined label shape from above using thermal heat. At this time, the thermal insulation power not only melts and cuts the side edges of the label, but also cuts a line from the lower end of the label to the side of the bag body, that is, a line slightly above the heat seal 5.

In the manufacturing method of the first invention, as described above, when attaching another printed label after manufacturing the product packaging bag,
There is no need for positioning using a phototube or the like, and it can be left to a mechanism that melts and cuts at regular intervals.

In this embodiment, the label sheet is punched out in a U-shape at part A in FIG. 4, which is the label fusing and cutting process, and the label fusing and cutting process is carried out.

If a step of continuously fusing and cutting the upper edge of the label is added before this fusing and cutting, the upper edge of the label sheet can also be avoided.

Finally, the composite continuous band is sent to a fusing and cutting stage on the side of the bag body, and the side edge portions are melted and cut to obtain the product packaging bag of this example.

This product packaging bag can be used as a package by putting items into it through the opening 12 and subjecting it to deaeration, heat sealing, heat sterilization, heat shrinkage, etc., as desired.

On the other hand, the manufacturing method of the second invention of the present invention is carried out by the same manufacturing method as the method of the first invention, except that a laminated sheet with a specific structure is used as the label sheet. Can be done.

In this case, it is necessary to use a thick plastic sheet having a concave lower edge, for example, an arc shape as shown in FIG. 6, on the width of the bag body of the target product packaging bag.

A label sheet in which a thin plastic film is laminated on at least one side of the plastic sheet can be used as a label sheet.

In this case, it is desirable that the lower edge of the thin plastic film to be laminated does not have a concave shape.

If even this thin film has a concave shape, it becomes impossible to fix a thick label sheet having a concave shape to the upper surface of the bag body film by heat sealing.

Also in the second invention, the label can be erected by the folding structure on the center line of the label sheet.

When using this folding structure, it is preferable that the upper edge of the label sheet has the same concave shape as the lower edge.

In the method of manufacturing a product packaging bag of this embodiment, a gusset fold is provided in the half-folded portion of a thin plastic film, and an inverted V-shaped fused portion is provided at each fold at an angle of 45 degrees, and the bag body is It is also possible to have a square bottom structure at one end.

In this way, not only rectangular parallelepiped-shaped items can be easily stored, but also cylindrical-shaped items such as ham can be packaged with good appearance.

[Effects of the Invention] The present invention has the advantage that it is possible to efficiently manufacture a product packaging bag in which a label is attached to the side of the bag body.

The use of this product packaging bag has the advantage of being able to label horizontally long products such as ham.

Further, the label of the product packaging bag of the present invention has a folding structure on the center line or a concave structure at the lower edge of the label sheet, so that the label can be maintained vertically, which is convenient for displaying products.

Furthermore, the labeled product packaging bag of the present invention has the advantage of not being bulky because the label can be folded and packaged when the package is carried.

[Brief explanation of the drawing]

1, 2, and 3 are cross-sectional views of a raw material sheet and a film in each step for explaining the order of steps in an embodiment of the manufacturing method of the present invention, and FIG. 4 is a sectional view of a raw material sheet and a film in the embodiment. FIG. 5 is a plan view of raw materials in the manufacturing process, FIG. 5 is a perspective view showing how a labeled product packaging bag manufactured by another embodiment of the manufacturing method of the present invention is used, and FIG. 6 is a plan view of the raw materials in the manufacturing process. Fig. 7 is a plan view showing the shape of the core material of a label sheet used in another example, Fig. 7 is a plan view of a product packaging bag manufactured according to the same example, and Fig. 8 shows its usage. FIG. 9 is a plan view showing the shape of the core material of a label sheet used in another embodiment, and FIG. 10 is a side view showing the label according to the embodiment of the present invention in an upright state. The symbols in the figure are l: label sheet, 2: thin plastic film for the upper part of the bag body, 3: thin plastic film for the lower part of the bag body, 4: internal separation plate, 5: heat seal fusion part, 6: label Lower edge for sheet heat sealing,
7; external separation plate; 8; concave lower edge; 9; label folded portion; 10°; label core material; 11; label laminated thin film; 12; opening. Patent applicant Yamagata Grahya Co., Ltd.

Claims (1)

[Claims] 1. A long length of polymerized thin plastic film for bags and a long length of thick label sheet for labels are simultaneously sent to a heat sealing stage, and among the polymerized plastic films, The middle part of the top plastic film and the edge of the thick label sheet are heat-sealed and fused together on an internal separation plate inserted between the polymerized films, and then placed on a fusing and cutting stage. The thick label sheet is fed out and cut into a predetermined label shape on the external separating plate inserted between the thick label sheet and the top plastic film, and then the side edges of the bag are melted and cut. A method for manufacturing a labeled product packaging bag, characterized by sending the bag to a processing table and fusing and cutting the side edges. 2. The method for producing a labeled product packaging bag according to claim 1, wherein the thick label sheet for long labels is a laminated sheet of a thick plastic sheet and a thin plastic film. 3. A labeled product packaging bag as set forth in claim 1, wherein the thick label sheet for long labels has a folding structure on a line near the center of the lower edge and upper edge of the sheet. manufacturing method. 4. Long polymerized thin plastic films for bags and thick label sheets for long labels are laminated sheets in which a thin plastic film is laminated on a thick plastic sheet, and the thickness of the thick plastic sheet is The lower edge is concave at the center for each width of the bag body part, and is simultaneously sent to a heat sealing process table, and the intermediate part of the upper plastic film and the thick label sheet of the polymerized plastic film are separated. The edges are made of a thin plastic film laminated to the
The thick label sheet is heat-sealed and fused on an internal separation plate inserted between the polymerized films, and then sent onto a fusing and cutting stage where the central portion of the thick label sheet is detected by means such as a phototube. After that, the center of the thick label sheet is positioned on the fusing process table, and then the thick plastic is placed on the external separation plate inserted between the thick plastic sheet and the top plastic film. Cut the sheet into the desired label shape,
A method for producing a labeled product packaging bag, which comprises sending the bag to a side edge fusing/cutting process table, and fusing and cutting the side edge. 5. A labeled product packaging bag as set forth in claim 4, wherein the thick label sheet for long labels has a folding structure on a line near the center of the lower edge and upper edge of the sheet. manufacturing method.