JPH0620900B2 - Manufacturing method of labeled product packaging bag - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a labeled product packaging bag. In particular, the present invention relates to a product packaging bag in which a label is located on a side portion of a package and the label is provided so as to stand upright, which is effective for advertising a packaged product.

[Prior Art] Conventionally, in the case of a product packaging bag, 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 portion of the bag body is complicated and has difficulty in continuous bag making, and has not been put to practical use and has not appeared in the market.

However, for example, when packaging horizontally long products such as ham,
The label for displaying 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 intermediate side of the bag body.

[Means for Solving Problems] The present inventor has earnestly studied a method for manufacturing a product packaging bag having a label on a side portion of a bag body portion of the structure by a continuous bag-making process, and as a result, has found that a fusion-separation plate By effectively utilizing
The present invention has been completed based on the idea that the desired continuous bag-making can be carried out efficiently.

That is, the present invention, the thin polymer film for a long bag polymerized and the thick label sheet for a long label are simultaneously sent to a heat-sealing process table, and the upper surface of the polymerized plastic film is The middle portion of the plastic film and the edge portion of the thick label sheet are heat-sealed and fused on the internal separation plate inserted between the polymerization films, and then sent out on the fusing step table. Then, on the external separation plate inserted between the thick label sheet and the upper surface plastic film, the thick label sheet is fused into a predetermined label shape, and then the fusing side edge of the bag body is fused. A method for producing a labeled product packaging bag, which comprises sending out to a table and fusing the side edges, and a thin plastic film for a long polymerized bag body, and A laminated sheet in which a thin plastic film is laminated on a hand plastic sheet, and the lower edge of the thick plastic sheet is concave at the center for each width of the bag body The label sheet is sent to the heat-sealing process table at the same time, and of the polymerized plastic film, the middle portion of the upper surface plastic film and the edge portion of the thick label sheet are inserted between the polymerized films. Heat-sealing and fusing on the separation plate, then sending out on the fusing step table, by detecting the central portion of the thick label sheet by means of a photoelectric tube or the like, the on the fusing step table After positioning the center of the thick label sheet, an external separation sheet inserted between the thick label sheet and the top plastic film is placed. A labeled product characterized by fusing the thick label sheet into a predetermined label shape on a sheet and then sending it to the fusing step table on the side edge of the bag body to fuse the side edge. It is a method of manufacturing a packaging bag.

As the long polymer thin plastic film used as the raw material of the present invention, a half-folded continuous sheet of thermoplastic plastic film can be used.

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

When the product packaging bag of the present invention is used as a food packaging bag, a film having oxygen barrier performance such as polyamide resin, ethylene-vinyl acetate copolymer saponification resin, vinylidene chloride resin and a film having heat sealing performance are used. Laminates and heat shrinkable films thereof can be preferably used.

Further, when used for packaging ham or the like, since it is boiled for a long time in the heat sterilization step, it is preferable to use a heat-resistant resin film such as a polyester resin or polyamide resin laminated on the outside.

Further, in the case of such food packaging, since the airtightness of the heat-sealed portion becomes a problem, it is necessary to widen the width of the heat-sealed portion for fusion in the production of the product packaging bag.

Since it is difficult to synchronize the label printing with the bag body film, it is not usually printed, but in some cases, for example, a continuous pattern flower flower may be back-printed or front-printed. it can.

A long thick label sheet which is another raw material used in the present invention may be a mere thick plastic sheet or a thick plastic sheet or a paper sheet and a laminated sheet in which a thin plastic film is laminated on one side or both sides. it can.

It is preferable to use these laminated sheets because they can be easily heat-sealed with the bag body film.

However, even when a thick single-layer plastic sheet is used, a resin whose material is the same as or similar to that of the bag body and whose lower edge is hot-rolled to be thin can be preferably used.

The thin plastic film used for the label sheet is preferably made of the same resin as the film of the bag body. However, when a heat-shrinkable film is used for the bag body, it is desirable to use the same resin as the one having no heat-shrinkability.

Characters or patterns are usually printed on this thick label sheet. The printing can be applied to either thick plastic or paper sheets or laminated plastic films.

In some cases, it is also possible to manufacture the product packaging bag without printing it, and then attach the separately printed label to the label sheet portion with an adhesive.

The folding structure can be provided on the upper edge and the lower edge of the thick label sheet used in the present invention substantially on the center line.

If such a thick label sheet is used, the label can be bent so that the upper edge of the label is a triangle on the surface of the package to stand the label as shown in FIG. At this time, the upright state can be made more reliable by clipping or stapling near the top of the triangle, or by fixing the upper edge to the package with an adhesive tape.

The folding structure is, for example, a two-layer or three-layer laminated sheet of a thick plastic sheet and a thin plastic film, and the thick plastic sheet is separated on the center line so that it can be easily folded. The structure can be realized.

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

As another folding structure, a thick plastic sheet can be laminated only on the upper half of the label, and the lower half can be a single layer of only the thin film.

As shown in Fig. 10, the elastic force of the warp of the upper half thick plastic sheet is held by the tension of the thin film to balance it, the tip of the thick sheet bites into the upper surface of the package, and the label is firmly attached. Will stand up.

In addition to this, the label material has excellent hinge performance,
For example, a polypropylene resin sheet may be used to form a bending groove, and this may be bent as a hinge portion.

As described above, when the folding structure is applied, it is desirable that the width of the label portion above the folding line is longer than that of the lower half.

If the width of the upper half is lengthened, the label can be erected by using the warp repulsive force of the label as described above without using an adhesive.

Thus, in order to utilize the elasticity of the sheet, a strong sheet is suitable. For example, a thick paper sheet laminated with a plastic film is suitable.

On the other hand, as the laminated sheet used in the second invention, use is made of a thick plastic sheet or a paper sheet used for the laminated sheet, in which the shape of the lower edge is a concave edge in the center for each width of the bag body portion. You can

That is, as shown in FIG. 6, for example, one having an arcuate edge for each width of the bag portion can be used.

When a laminated sheet in which a thin plastic film is laminated on at least one side of such a thick plastic sheet or a paper sheet, a product packaging bag of the present invention in which the concave portion of the label as shown in FIG. Can be manufactured.

In the present invention, it is difficult to make a thick label having a straight lower edge vertical if the upper part of the product is convex.

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

Even if the top surface of the article is not convex, for example, when storing a prismatic article such as a square ham, as shown in FIG. 9, a lower edge that is linearly concave and only protrudes at both ends. If the label is formed and the width of the label is made slightly larger than the width of the rectangular product, for example, in the case of a rectangular sausage, the label becomes easy to stand upright.

As described above, in the present invention, by appropriately selecting the shape of the concave portion at the lower edge of the thick plastic sheet portion of the laminated label according to the product, the label can be erected for packaging.

[Examples] The production method of the present invention will be described in more detail with reference to Examples. The present invention is a continuous bag-making process, and the raw material is manufactured by continuously supplying a long plastic film or plastic sheet.

Thus, these steps can be represented in a vertical cross section for such a continuous sheet flow.

In the embodiment of FIG. 1, as a thick label sheet, a thin plastic film 11 is half-folded and laminated on both sides of a thick plastic sheet 10 and fixed by heat sealing at the other edge of the thick plastic sheet. A thin plastic film is slightly extended from this heat-sealing portion to form a lower edge portion for heat-sealing with the bag body.

In the manufacturing method of the first invention of the present invention, first, a long thick label sheet 1 is placed on a long half-fold polymerized thin plastic film 2, 3 so as to have the sectional structure of FIG. And send it onto the heat-sealing process table.

On the heat-sealing table, as shown in FIG. 2, the internal separating plate 4 is inserted between the half-folded polymer films 2 and 3.

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

A hot iron is continuously pressed against the inner separating plate 4 from above the lower edge portion of the label sheet to fuse it.

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

Then, the composite continuous strips fused to each other are fed onto a fusing stage.

On the process table, the external separation plate 7 is inserted as shown in FIG. The outer separation plate 7 is inserted from the right side when the label sheet has the upper edge facing to the right.

From here, switch to intermittent frame feeding, which is the usual method in the bag making process. The label printing pattern or photoelectric mark is detected by a photoelectric tube, the label sheet is positioned so as to match the fusing position of the fusing blade, and the composite continuous band is stopped. Then, a label is formed by fusing with a fusion heat insulating blade into a predetermined label shape from above. At this time, the heat insulating blade not only cuts the side edge of the label, but also cuts the line from the lower end of the label to the bag body side, that is, the line slightly above the heat seal 5.

In the manufacturing method of the first invention, as described above, when another printing label is attached after the product packaging bag is manufactured,
Positioning is not required due to the photoelectric tube or the like, and a mechanism for fusing at regular intervals can be used.

In the present embodiment, the label fusing step is performed by punching out the label sheet in a U shape at the portion A in FIG. 4 which is the label fusing step portion.

If the step of continuously fusing the upper edge of the label is added before this fusing, the upper edge of the label sheet can also be fused.

Finally, the composite continuous strip is sent to the fusing step table on the side of the bag body, and the side edge portion is fused to obtain the product packaging bag of this embodiment.

This product packaging bag can be used as a package by putting a product through the opening 12 and performing deaeration, heat sealing, heat sterilization, heat shrinkage, etc., if desired.

On the other hand, the manufacturing method of the second invention of the present invention is the same manufacturing method as the method of the first invention except that the label sheet is a laminated sheet having a specific structure in the manufacturing method of the first invention. You can

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

Then, a laminate of a thin plastic film on at least one surface of the plastic sheet can be used as a label sheet.

In this case, it is desirable that the laminated thin plastic film does not have a concave bottom edge.

If the thin film has a concave shape, the thick label sheet having a concave shape cannot be fixed to the upper surface of the bag body film by heat sealing.

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

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

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

In this way, not only the rectangular parallelepiped-shaped product can be easily stored, but also the cylindrical-shaped one such as a ham can be formed into a good packaging.

[Advantages of the Invention] The present invention has an advantage that a product packaging bag in which a label is attached to a side portion of a bag body can be efficiently manufactured.

The use of this product packaging bag has an advantage that a product having a horizontally long shape such as ham can be labeled.

Further, according to the present invention, since the lower edge of the label sheet has a concave structure, the label can be maintained vertically, which is convenient for displaying products.

Further, the labeled product packaging bag of the present invention has an advantage that the label can be folded and packaged when carrying the package, so that the package is not bulky.

[Brief description of drawings]

FIGS. 1, 2 and 3 are sectional views of the raw material sheet and the film in each step for explaining the order of steps in the embodiment of the manufacturing method of the present invention, and FIG. 4 is a view of the same embodiment. It is a top view of the raw material in a manufacturing process, FIG. 5 is a perspective view which shows the use condition of the labeled product packaging bag manufactured by other embodiment of the manufacturing method of this invention, FIG. 6 is this invention. FIG. 7 is a plan view showing a shape of a core material of a label sheet used in another embodiment, FIG. 7 is a plan view of a product packaging bag manufactured according to the same embodiment, and FIG. 8 shows its usage. FIG. 9 is a perspective view, FIG. 9 is a plan view showing the shape of the core material of the label sheet used in another embodiment, and FIG. 10 is a side view showing the upright state of the label of the embodiment of the present invention. Reference numerals in the drawings are 1; label sheet, 2; thin plastic film for upper bag part, 3; thin plastic film for lower bag part, 4; internal separation plate, 5; heat seal fusion part, 6; label Lower edge for seat heat seal,
7: external separation plate, 8: concave lower edge, 9: label bent portion, 10: label core material, 11: label laminated thin film, 12: opening.

Claims (5)

[Claims] 1. A long polymer thin plastic film for bag and a long label thick label sheet are simultaneously sent to a heat-sealing process table, and the top plastic of the polymer plastic film is discharged. The middle portion of the film and the edge portion of the thick label sheet are heat-sealed and fused on the internal separation plate inserted between the polymerization films, and then sent out on the fusing step table. , On the external separation plate inserted between the thick label sheet and the top plastic film, the thick label sheet is fused into a predetermined label shape, and then the fusing step table of the side edge of the bag body. A method for manufacturing a labeled product packaging bag, which comprises: 2. A labeled product packaging bag according to claim 1, wherein the long label thick label sheet is a laminated sheet of a thick plastic sheet and a thin plastic film. Production method. 3. The label according to claim 1, wherein the long label thick label sheet has a folding structure on the lines near the center of the lower edge and the upper edge of the sheet. Of manufacturing a product packaging bag with a package. 4. A laminated thin plastic film for polymerized bags and a laminated sheet in which a thin plastic film is laminated on a thick plastic sheet, wherein the lower edge of the thick plastic sheet is the bag body portion. At the same time, a thick label sheet for a long label having a concave shape in each central portion is sent out to a heat-sealing process table, and among the polymerized plastic films, the middle portion of the upper surface plastic film and the thick plastic film. The edge portion of the label sheet is heat-sealed and fused on the inner separation plate inserted between the polymerization films, and then sent out on the fusing step table, and the thick sheet is formed by means such as a photoelectric tube. Detecting the central part of the label sheet and positioning the center of the thick label sheet on the fusing step table, On the external separation plate inserted between the sheet and the upper surface plastic film, the thick label sheet is fused into a predetermined label shape, and then sent to the fusing step table on the side edge of the bag body, and the side edge. A method for manufacturing a labeled product packaging bag, which comprises melting the 5. The label according to claim 4, wherein the long label thick label sheet has a folding structure on the lines near the center of the lower edge and the upper edge of the sheet. Of manufacturing a product packaging bag with a package.