Stocking packaging bag and its manufacturing method

Abstract

To provide a packaging bag for stockings that can be separated and disposed of mainly as paper and is eco-friendly by reducing plastic materials.SOLUTION: A paper material 1a is interposed in a middle layer, and a transparent first resin film 1b on which explanatory text of stockings etc. is printed is laminated on the outer layer of the paper material 1a as well as a transparent second resin film 1c that has heat-sealing properties and protects stockings is laminated on the inner layer of the paper material 1a to form laminated material. A bag is made from the laminated material mainly made of the paper material 1a by sealing a width surface 2 corresponding to the upper side of a bag body 1, edge parts 3a and 3b corresponding to the right and left sides and an edge part 4 corresponding to the bottom side, where the paper material 1a has a weight of 60 g / m2 to 80 g / m2, the first resin film 1b has a thickness of 12 μm to 18 μm, and the second resin film 1c has a thickness of 20 μm to 60 μm.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a packaging bag for pantyhose, stockings, tights, etc. (hereinafter simply referred to as "stockings") and a method for manufacturing the same. More specifically, the present invention relates to a packaging bag for stockings that can be separated and disposed of as paper, is eco-friendly by reducing the amount of plastic material used, uses a small amount of constituent materials, allows the contents to be seen from outside the bag, is easy to open, and does not take up too much space even when multiple bags are stacked and displayed, and a method for manufacturing the same. [Background technology]

[0002] Conventionally, a known packaging bag paper that can be separated as paper and uses minimal constituent materials is a multi-layered packaging bag paper consisting of a surface layer primarily composed of natural fibers and a back layer containing at least two types of synthetic fibers with heat-sealing properties (Patent Document 1). The packaging paper is provided for use as a desiccant, deodorizer, air freshener, tea bag, barley tea bag, etc.

[0003] Generally, packaging bags for stockings are made up of a plastic bag, a plastic display hook, cellophane tape, interleaf paper, inner backing paper, etc., and are generally complex bags made up of many different materials.

[0004] To open the packaging bag, one removes the two strips of cellophane tape T that are attached between the bag body and the lid as shown in Figure 4a, opens the plastic bag P as shown in Figure 4b and removes the interleaf S1, and then unfolds the interleaf S1 as shown in Figure 4c to remove the stockings G wrapped around the inner backing S2. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4597397 Summary of the Invention [Problem to be solved by the invention]

[0006] The packaging bag shown in Figure 4a is carefully packaged, but it is made up of many different materials, and it takes time and effort to separate the paper and plastic materials when disposing of it.

[0007] To provide a packaging bag for stockings that can be separated mainly as paper, is eco-friendly by reducing plastic materials, has a small amount of constituent materials, allows stockings sealed in the bag to be seen from outside the bag, is not bulky even when a plurality of bags are stacked and displayed, and is easy to open. [Means for solving the problem]

[0008] The packaging bag according to claim 1 of the present application is a packaging bag for stockings, which is made by laminating a transparent first resin film, which has a paper material interposed as an intermediate layer and on which explanations, designs, patterns, etc. of stockings are printed on the front and back surfaces of the bag body, onto the outer layer of the paper material, and laminating a transparent second resin film, which has heat sealing properties and protects stockings, onto the inner layer of the paper material, heat-sealing the wide surface corresponding to the top side of the bag body and the edges corresponding to the left and right sides, placing stockings in the bag, and then sealing the edges corresponding to the bottom side of the bag body, to form a flat bag or a gusset bag, The paper material has a weight of 35 g / m2 to 80 g / m2, the first resin film has a thickness of 12 μm to 80 μm, and the second resin film has a thickness of 20 μm to 120 μm, and the bag is made from a laminated material mainly made of paper.

[0009] The packaging bag according to claim 2 of the present application is characterized in that a window portion is provided on the surface of the bag body, through which stockings can be seen from outside the bag.

[0010] The packaging bag according to claim 3 of the present application is characterized in that a hole for hanging display is provided by opening it in a width surface corresponding to the heat-sealed upper edge of the bag body.

[0011] The packaging bag according to claim 4 of the present application is characterized in that an air vent hole for venting air held inside the bag body is provided on the surface near the corner between the heat-sealed edges of the left and right sides and the bottom edge of the bag body.

[0012] The packaging bag according to claim 5 of the present application is characterized in that notches for tearing open are provided on the left and right edges in line with the lower edge of the wide surface corresponding to the heat-sealed upper edge of the bag body.

[0013] The method for producing a packaging bag according to claim 6 of the present application includes interposing a paper material as an intermediate layer, laminating a first resin film on the outer layer of the paper material, providing a window portion that allows the stockings to be seen from the outside in a portion corresponding to the front side of the bag body, and then laminating a glued transparent second resin film on the inner layer of the paper material, When winding up the first resin film laminated to the paper material, a strip of film that has not been corona treated is inserted in between, aligned with the opening position of the window and facing the film surface of the first resin film, and the glued transparent second resin film is laminated to the inner layer of the paper material.After that, the strip of film is removed from the unwinding side of the second resin film laminated to the paper material, and finally a bag is made from the laminate of the paper material, the first resin film, and the second resin film. [Effects of the Invention]

[0014] In the packaging bag for stockings according to claim 1 of the present application, the paper material has a weight of 35g / m2 to 80g / m2, the first resin film has a thickness of 12μm to 80μm, and the second resin film has a thickness of 20μm to 120μm, and the bag is made from a laminated material consisting mainly of paper and laminated with the first and second resin films, which reduces the amount of constituent materials and plastic material, making it eco-friendly and allowing the bag to be made so that it can be sorted as paper.In addition, the inner layer of the bag is formed from the second resin film, which also protects the stockings enclosed in the bag.

[0015] In the packaging bag for stockings according to claim 2 of the present application, the inner layer of the bag is formed from a transparent second resin film, and a window portion through which the stockings can be seen from the outside is provided on the surface side of the bag body, so that at least the purchaser can check the contents inside in advance.

[0016] In the packaging bag for stockings according to claim 3 of the present application, the holes for hanging display are opened in the wide surface corresponding to the heat-sealed upper edge of the bag body. Therefore, even if the bag is made from a laminated material mainly made of paper, the wide surface corresponding to the upper edge of the bag body is rigid due to the heat seal, so that tearing due to the holes for hanging display can be prevented.

[0017] In the packaging bag for stockings according to claim 4 of the present application, holes for venting air trapped inside the bag body are provided on the surface near the corners of the heat-sealed edges of the left and right sides of the bag body and the bottom edge, thereby allowing the air trapped inside the bag body to be vented, and preventing the bag from becoming bulky even when multiple bags are stacked and displayed as flat bags or gusset bags.

[0018] In the packaging bag for stockings according to claim 5 of the present application, notches for tearing open are provided on the edges of the left and right sides in line with the lower edge of the wide surface corresponding to the heat-sealed upper edge of the bag body. As a result, the wide surface corresponding to the upper edge of the bag body is rigid due to the heat seal, and the bag body can be easily opened along the lower edge of the wide surface using the notches provided on the edges of the left and right sides.

[0019] In the manufacturing method for packaging bags according to claim 6 of the present application, a paper material and a first resin film are laminated together, and a window portion through which stockings can be seen from the outside is provided on the surface side of the bag body. Then, a glued transparent second resin film is laminated to the paper material using a pressure adhesive roll. When a bag is made from the laminated material of the paper material and the first and second resin films, a strip of film that has not been corona-treated is interposed between the paper material and the winding side of the first resin film, aligned with the opening position of the window portion and facing the first resin film. This prevents the glue adhering to the second resin film from leaking out of the window portion onto the winding side when laminating the glued second resin film to the paper material. Furthermore, because the strip of film has not been corona-treated, it can be easily removed when wound up, and since the strip of film is removed prior to bag making, there is no disruption to bag making. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a plan view showing the front side of a packaging bag for stockings according to the present invention. [Figure 2] 2 is an enlarged cross-sectional view of the packaging bag taken along line AA in FIG. [Figure 3] FIG. 3 is a block diagram showing the manufacturing process for producing the packaging bag according to the present invention. [Figure 4a] FIG. 4a is an explanatory diagram showing the structure of a typical conventional stocking and the procedure for taking out the stocking. [Figure 4b] FIG. 4b is an explanatory diagram showing the structure of a typical conventional stocking and the procedure for taking out the product. [Figure 4c] FIG. 4c is an explanatory diagram showing the structure of a typical conventional stocking and the procedure for taking out the product. DETAILED DESCRIPTION OF THE INVENTION

[0021] As shown in Figure 1, the packaging bag for stockings of the present application is made into a flat bag having a bag body 1, a heat-sealed portion 2 on the wide surface corresponding to the top side of the bag body 1, heat-sealed portions 3a and 3b on the edges corresponding to the left and right sides of the bag body 1, and a heat-sealed portion 4 on the edge corresponding to the bottom side of the bag body 1. Instead of heat sealing, the edge corresponding to the bottom side of the bag body 1 can be sealed with double-sided adhesive tape.

[0022] The bag body 1 is provided with a window 5 through which the stockings contained in the bag can be seen from outside the bag, a hole 6 for hanging display, a hole 7 for letting out the air held inside the bag body 1, rounded corners 8a, 8b at the corners corresponding to the upper side of the bag body 1, and notches 9a, 9b for tearing open.

[0023] The window 5 is located in the approximate center of the front side of the bag body 1 so that it is easy to see, and is formed in the shape of a horizontal frame. The hole 6 for hanging display is formed as a round hole in the heat-sealed portion 2 on the wide surface corresponding to the top edge of the bag body 1. The air release hole 7 is formed as a small hole in the surface near the corner between the heat-sealed portion 3a on the right edge and the heat-sealed portion 4 on the bottom edge. The rounded corners 8a, 8b are formed by edging them into an arc shape about one-quarter of a circle. The notches 9a, 9b for tearing open are roughly V-shaped and formed in the heat-sealed portions 3a, 3b on the left and right sides, aligned with the bottom edge 1 of the heat-sealed portion 2 corresponding to the top edge of the bag body 1.

[0024] As shown in Figure 2, the bag body 1 is made from a laminated material in which a paper material 1a is sandwiched between two layers, a transparent first resin film 1b is laminated as an outer layer on which descriptions, designs, patterns, etc. of the stockings are printed on the front and back surfaces of the bag body, and a transparent second resin film 1c is laminated as an inner layer which has heat-sealing properties and protects the stockings.

[0025] As the paper material 1a, white kraft paper or white vellum paper is most preferable, but brown kraft paper, yellow vellum paper, or white cotton paper can also be used. As the first resin film 1b, biaxially oriented polypropylene (OPP) is most preferable, but polyester (PET) or nylon can also be used instead. As the second resin film 1c, unoriented polypropylene (CPP) is most preferable, but loden polyethylene (LDPE, L-LDPE) can also be used instead.

[0026] The paper material 1a has a weight of 35 g / m2 to 80 g / m2, the first resin film 1b has a thickness of 12 μm to 80 μm, and the second resin film 1c has a thickness of 20 μm to 120 μm. As a result, the bag body 1 is made from a laminated material mainly composed of the paper material 1a.

[0027] The stocking packaging bag constructed in this way is made from a laminated material consisting of paper material 1a weighing 60g / m² to 80g / m², first resin film 1b having a thickness of 12µm to 18µm, and second resin film 1c having a thickness of 20µm to 60µm. This minimizes the amount of constituent materials and reduces plastic material, making it eco-friendly. Since the bag is made from a laminated material with more than 50% paper, it can be made to be recyclable as paper. Furthermore, the inner layer of the bag is made from the second resin film, which also protects the stockings enclosed within.

[0028] In the stocking packaging bag, the inner layer of the bag is formed of a transparent second resin film 1c, and a window 5 is provided on the surface of the bag body 1 so that the stockings contained in the bag can be seen from outside the bag, so that at least the purchaser can check the contents inside in advance.

[0029] In addition, a hole 6 for hanging display is provided by opening it in the wide surface 2 corresponding to the heat-sealed upper edge of the bag body 1, so even if the bag is made from a laminated material mainly made of paper material 1a, the wide surface corresponding to the upper edge of the bag body 1 has rigidity due to the heat seal, so there is no risk of tearing due to the hole 5 for hanging display.

[0030] Furthermore, since a hole 7 for venting the air held inside the bag body 1 is provided on the surface near the corner between the edge of the heat-sealed right side 3a of the bag body 1 and the edge of the bottom side 4, the air held inside the bag body 1 can be vented and multiple bags can be stacked and displayed as flat bags, preventing the bag from becoming bulky due to multiple bags.

[0031] Furthermore, notches 9a, 9b for tearing open are provided on the edges of the left and right sides in accordance with the lower edge l of the wide surface 2, which corresponds to the heat-sealed upper edge of the bag body 1. As a result, the wide surface 2, which corresponds to the upper edge of the bag body 1, is rigid due to the heat seal, and the bag body 1 can be easily opened along the lower edge l of the wide surface by the notches 9a, 9b provided on the edges of the left and right sides 3a, 3b.

[0032] The packaging bags for stockings manufactured in this way are made through the processes shown in Figure 3. In the manufacturing of these packaging bags, the bag material is a continuous wide strip that is wound into a roll and then unwound and supplied at each process. Each process is arranged separately, and the bag material is supplied in the form of a rolled ball, and finally, after passing through a heat sealing process, it is cut into individual bags.

[0033] When making flat bags, a wide bag material is supplied that corresponds to the front and back widths of the bag. When making gusset bags, a material that has a width corresponding to the front and back widths of the bag as well as the widths of the left and right gussets is supplied.

[0034] First, the transparent first resin film 1b is unwound and fed in a roll state to the gravure printing process. In this gravure printing process 10, in order to protect the printed surface, descriptions, designs, patterns, etc. of the stockings are printed on the back (inner) side of the film, which corresponds to the front and back of the bag body 1. When multi-color printing is performed, printing units according to the number of colors are arranged, and a drying process is performed after each print.

[0035] Next, the first resin film 1b, whose printed surface has been dried, is sent to a lamination process 11 where it is laminated with paper material 1a. In this lamination process 11, the glued first resin film 1b is sent to a drying oven to dry the glue attached to one side of the first resin film 1b (dry lamination process), and then the glued first resin film 1b is pressure-bonded to the paper material 1a.

[0036] After the paper material 1a and the first resin film 1b are laminated, the product is sent to an aging process 12. The aging process involves drying the product at a temperature of about 40°C for about 40 hours. After this aging process, the product is sent to a process 13 for punching out the window portion 5. The window portion 5 is opened at regular intervals on the side of the laminate of the continuous strip-shaped paper material 1a and the first resin film 1b that corresponds to the surface of the bag body 1.

[0037] After the window 5 is opened, the film is sent to lamination process 14 where it is laminated with a transparent second resin film 1c. Glue is applied to the second resin film 1c on the side facing the paper material 1a. At this time, because the window 5 is already provided in the laminate of paper material 1a and first resin film 1b, a strip of film (not shown) that has not been corona-treated is inserted on the side facing the first resin film 1b in line with the opening position of the window 5 to prevent glue from adhering from the window 5 to the pressure roller or the laminate being wound underneath during subsequent winding.

[0038] After the laminate is produced, it is sent to a second aging process 15. This aging process is carried out at the same temperature for the same time as the first aging process 12. After the second aging treatment, it is sent to a process 16 for winding and removing the interposed strip film prior to the second lamination process 14. Because the strip film used is not corona treated, it can be reliably wound and removed from the first resin film 1b.

[0039] After the anti-glue strip film is wound up and removed, the first resin film 1b undergoes an inspection process for the printed surface, and the second resin film 1c undergoes an inspection process 17 for the film surface, and then undergoes another image processing process. If any missing parts are found in the inspection process using image processing, they are removed in the subsequent bag making process.

[0040] In the flat bag making process 18, the bag body 1 is cut into a front side and a back side with a slitter, and then the two layers are stacked and sent to the heat sealing process. In this bag making process 18, first, the wide side 2 corresponding to the top side of the bag body 1 is heat sealed and a hole 6 for hanging display is made, then the edges 3a, 3b corresponding to the left and right sides are heat sealed and an air vent hole 7, rounded corners 8a, 8b, and notches 9a, 9b are made, and the bag is cut into individual bags before stockings G are stored inside.

[0041] When making a gusset bag, first, as described above, the bag body 1 is cut into the front and back sides, and the surfaces corresponding to the left and right gusset portions are cut in a slitter process 19. The widths corresponding to the left and right gusset portions are sandwiched between the front and back sides of the bag body 1, and in a bag making process 20, the wide surface 2 corresponding to the top side of the bag body 1 and the edges 3a, 3b corresponding to the left and right sides are heat-sealed, a hole 6 for hanging display is made, an air hole 7, rounded corners 8a, 8b, and notches 9a, 9b are made, and the bag is cut into bag units before storing stockings G.

[0042] Finally, the stockings are placed in the bag, and the edge 4 corresponding to the bottom of the bag body is sealed with heat sealing or double-sided adhesive tape to complete the product.

[0043] When making a bag for packaging stockings in this way, even if a window 5 is provided on the surface of the bag so that the stockings G contained in the bag can be seen from the outside, when laminating the second resin film 1c, a strip of film that has not been corona treated can be inserted in line with the opening position of the window 5, preventing glue adhering to the second resin film 1c from adhering to the pressure roller or the laminated material wound underneath through the window 5 during subsequent winding, and the strip of film can be reliably wound and removed later, preventing any problems from occurring during the bag making process. [Explanation of symbols]

[0044] 1 bag 1a Paper material 1b First resin film 1c Second resin film 3a, 3b Edges corresponding to the left and right sides of the bag body (heat seal) 4. The edge corresponding to the bottom of the bag body (sealed with heat seal or double-sided adhesive tape) 5. Holes that allow stockings stored inside the bag to be seen 6 Holes for hanging display 9a,9b Opening notch

Claims

1. A stocking packaging bag is manufactured by laminating a transparent first resin film, which has a paper material interposed as an intermediate layer and on which explanations, designs, patterns, etc. of stockings are printed on the front and back surfaces of the bag body, onto the outer layer of the paper material, and laminating a transparent second resin film, which has heat sealing properties and protects stockings, onto the inner layer of the paper material.Then, the width surface corresponding to the top side of the bag body and the edges corresponding to the left and right sides are heat-sealed from this laminated material, and after stockings are placed inside the bag, the edges corresponding to the bottom side of the bag body are sealed to form a flat bag or a gusset bag. The paper material has a weight of 35 g / m2 to 80 g / m2, the first resin film has a thickness of 12 μm to 80 μm, and the second resin film has a thickness of 20 μm to 120 μm, and the bag is made from a laminate material mainly made of paper.

2. 2. The packaging bag according to claim 1, wherein a window is provided on the surface of the bag body through which the stockings can be seen from outside the bag.

3. 2. The packaging bag according to claim 1, wherein the holes for hanging display are formed on a wide surface of the bag body corresponding to the upper edge to be heat-sealed.

4. 2. The packaging bag according to claim 1, wherein holes for venting air held inside the bag body are provided on the surface near the corners of the left and right edges and the bottom edge of the bag body to be heat-sealed.

5. 2. The packaging bag according to claim 1, wherein notches for tearing open are provided on the left and right edges in alignment with the lower edge of the wide surface corresponding to the upper edge to be heat-sealed of the bag body.

6. A paper material is interposed as an intermediate layer, a first resin film is laminated on the outer layer of the paper material, a window portion through which the stockings can be seen from the outside is provided on the surface side of the bag body, and then a glued transparent second resin film is laminated on the inner layer of the paper material. This method for manufacturing a bag for packaging stockings is characterized in that, when winding up the first resin film laminated with the paper material, a strip of film that has not been corona treated is inserted in line with the opening position of the window and facing the film surface of the first resin film, the glued transparent second resin film is laminated to the inner layer of the paper material, and then the strip of film is removed from the unwinding side of the second resin film laminated with the paper material, and finally a bag is made from the laminate of the paper material, the first resin film, and the second resin film.

Images