Pouch

Abstract

To obtain a pouch having a pouring portion which can be torn open by firmly gripping it even when hands are wet and which can be manufactured on a normal production line.SOLUTION: There is provided a pouch 1 in which laminated films are stacked together, and the surrounding upper side 11, left side 12, right side 13, and bottom side 14 are sealed or folded to be closed, thereby forming a storage portion 10 inside. The pouch includes a pouring portion 2 formed at an intersection of adjacent sides, the pouring portion including: a pouring end seal portion 15 extending obliquely upward in a protruding manner; and a pouring path 20 that is a non-fused portion surrounded by the pouring end seal portion, where the pouring portion can be opened by cutting off a tab 22 at a tip of the pouring end. The pouring portion has an anti-slip layer containing a resin-based elastomer on a surface thereof.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] To provide a pouch for packaging toiletries such as liquid detergent and fabric softener, and foods such as edible oil, sauce and instant coffee, which can be easily opened without using tools such as scissors or a cutter, particularly for refilling. [Background technology]

[0002] Toiletries such as liquid detergent and fabric softener, and foods such as cooking oil and instant coffee are stored in dedicated containers with easy-to-use shapes, such as plastic bottles and glass bottles. These dedicated containers are sturdy and therefore expensive, so they can be reused when the contents run out. Refill pouches for refilling these dedicated containers are sold separately.

[0003] For example, in the case of a refill pouch for storing liquid or other flowable contents, it is desirable that the contents can be easily and safely transferred into a dedicated container, while at the same time being inexpensive, the empty bag does not take up much space, and it is easy to dispose of after use. For this reason, pouches with a spout, in which a narrow spout is provided in part of the upper part of the bag by heat sealing, are becoming widely used.

[0004] These refill pouches are made of strong materials to increase their drop resistance, so initially, scissors or similar tools were required to open the small pouring section. However, preparing tools such as scissors is time-consuming, and the contents of the contents can easily adhere to the scissors, causing problems such as rust and difficulty in cutting. Pouches have been developed that have a notch or slit on the edge, or an easy-open line running along both the left and right sides. However, in order to tear off the base of the spout, a lot of force is required, and it is necessary to grab it tightly, but there are problems such as the fact that it tends to slip and it is difficult to exert force.

[0005] Therefore, in Patent Document 1, A flexible packaging bag made of a plastic film material, the spout being formed by cutting a cutout portion along a cutout indication line, The present invention proposes a flexible packaging bag characterized in that an anti-slip layer is provided on at least the surface of the tab of the cut-out portion of the flexible packaging bag.

[0006] This anti-slip layer is applied with a coating liquid or ink mainly composed of a matte material and a binder to prevent slipping and allow the user to grip it firmly and tear it apart. However, if you try to grip it with wet hands, it becomes slippery, so this is not a sufficient measure.

[0007] In Patent Document 2, A packaging container that includes at least one layer of resin film and is sealed after being filled with contents, A pouring portion for pouring out the filled contents to the outside is provided via a breaking portion that can be opened by fingers, and the packaging container has a gripping portion at least on the tip side of the breaking portion, The present invention proposes a packaging container characterized in that a non-slip surface for fingers is formed on at least one surface of the gripping portion.

[0008] This grip is made of a non-slip layer with unevenness or a coating of UV-curable ink. However, it is difficult to position the uneven coating, and incorporating an ultraviolet curing device into the line requires changes to the production line, which results in high costs. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2005-96778 A [Patent Document 2] Utility Model No. 3139720 Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, an object of the present invention is to obtain a pouch having a pouring portion that can be opened by tearing, which can be firmly grasped and torn even with wet hands, and which can be manufactured on a normal production line. [Means for solving the problem]

[0011] The pouch of the present invention is a pouch formed by overlapping laminated films and sealing or folding the periphery of the upper side, left side, right side, and bottom side to form a storage section therein, The pouring portion is formed from a pouring end seal portion that extends obliquely upward in a protruding manner at the intersection of the adjacent sides, and a pouring path in a non-fused portion surrounded by the pouring end seal portion, and has a pouring portion that can be opened by cutting off a tab portion at the tip of the pouring end, The pouch is characterized in that the surface of the pouring part has an anti-slip layer containing a resin-based elastomer. Effect of the Invention

[0012] The pouch of the present invention has an anti-slip layer mainly composed of a resin-based elastomer, so that it does not slip even when picked up with wet hands and can be torn forcefully. Furthermore, since there is no need for an ultraviolet curing device or highly accurate positioning, the film can be manufactured on a normal manufacturing line. [Brief description of the drawings]

[0013] [Figure 1] 1 is an overall view showing an example of a pouch according to the present invention, and an enlarged view of the vicinity of the spout. FIG. [Diagram 2] 1A to 1C are diagrams showing a process for opening the spout of a pouch according to the present invention. [Diagram 3] FIG. 2 is a schematic diagram of a film constituting a pouch according to the present invention. [Figure 4] FIG. 1 is a diagram showing the shape of a pouch used in Examples and Comparative Examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the pouch of the present invention will be described with reference to the drawings. FIG. 1 is an overall view showing an example of a pouch according to the present invention, and an enlarged view of the vicinity of the spout. The pouch 1 of the present invention is a pouch formed by overlapping a front film 101 and a rear film 102 made of a laminated film with their back sides facing each other, and has a top edge portion 11, a left edge portion 12, a right edge portion 13, and a bottom edge portion 14 around its periphery, and is provided with a storage section 10 for storing contents inside. The example of the pouch shown in FIG. 1 is a standing pouch in which a bottom film 141 is fused to the bottom, making the pouch self-supporting.

[0015] This pouch has a pouring portion 2 consisting of a pouring end seal portion 15 that extends diagonally upward like a protrusion at the intersection of either the left side portion 12 or the right side portion 13 and the top side portion 11. In Figure 1, the pouring portion 2 is located at the intersection of the left side portion 12 and the top side portion 11. The spout portion 2 has a tapered outer shape, a spout end seal portion 15, a side cutout 121, and a top cutout The container is formed of a notch 111 and a pouring path 20 in the non-fused portion surrounded by the notch 111, and has an opening portion 21 that can be easily torn off to open.

[0016] 1, the tearing portion 21 is formed by an easy-to-open processing line 210 capable of forming a pouring outlet, which runs from a sharp cutout portion 1110 of the top cutout 111 through the pouring path 20 where the front and back films are not fused to the side cutout 121. Therefore, when the tearing portion 21 is broken and removed, the easy-to-open processing line 210 exposes the pouring path 20, making it possible to pour out the contents.

[0017] The front film 101 and the rear film 102 used in the pouch of the present invention are composed of a base layer 103 and an inner sealant layer 104, as shown in FIG. 3-1. As shown in Fig. 3-2, the easy-open processing line 210 is configured by linearly scanning the laser beam to remove the base material layer linearly to make it thinner, or by completely removing the base material layer linearly and supporting it with the sealant layer. Therefore, if both sides of the easy-open processing line 210 are forcibly pulled, it can be easily torn apart because it is a weakened line made only of the sealant layer, which has low strength. The easy-to-open processing line 210 can be made by half-punching with a knife blade, but this is not a stable process, so it is preferable to form a weakened line that can be partially broken by scanning with laser light. As the laser light for processing, gas lasers such as carbon dioxide laser and nitrogen laser, and solid lasers such as ruby ​​laser and YAG laser can be used, but in order to remove the base layer particularly reliably, a carbon dioxide laser is preferable.

[0018] As described above, the easy-open processing line 210 is processed from the sharp cutout portion 1110 of the top edge cutout 111, through the pouring path 20 where the front and back films are not fused, to the side edge cutout 121. Although the processing line can be broken with just one processing line, it is preferable to form the easy-open processing line by multiple parallel weakened lines between the pouring destination side and the storage section side. In the case of carbon dioxide laser light, the scanning line is not smooth, so if an easy-to-open processing line is formed using multiple parallel weakened lines, even if the tear shifts to the left or right, the easy-to-open processing line will tear and ensure opening, preventing the tear from shifting significantly.

[0019] In addition, it is preferable that the easy-open processing line 210 is formed from a straight or curved weakened line that cuts out the non-fused portions of the front film 101 and the rear film 102, and that the processing line does not have any sharp angle bends. Naturally, it is preferable to process the weakened lines at the same positions on the front and back.

[0020] The upper edge notch 111 and the side edge notch 121 on both ends of the easy-open processing line 210, or the entire outer shape can be punched out by a Thompson blade, press punched out by a die, or press processing by a Vic blade. Part of the outer shape can simply be cut off in a separate process.

[0021] FIG. 2 is a diagram showing the process of opening and pouring the pouch according to the present invention. FIG. 2-1 shows the process of opening the spouting part 2. The opening portion 21 is formed from the pouring end seal portion 15 having a tapered outer shape, the fusion portion surrounded by part of the side edge cutout 121 and the upper edge cutout 111, and the tip side of the pouring path 20, and is connected to the storage portion side of the pouch by a weakened line 210. This opening portion 21 is a gripping portion 22 that can be gripped by hand and torn to open when opening.

[0022] The surface of the grip portion 22 is provided with an anti-slip layer 105 made mainly of a resin-based elastomer. This resin elastomer is an acrylic elastomer, a styrene elastomer, an olefin elastomer, Examples of elastomers include vinyl elastomers, urethane elastomers, ester elastomers, amide elastomers, and PVC elastomers; thermoplastic resin elastomers that soften when heated and have rubber properties when cooled; and thermosetting resin elastomers such as silicone rubber, fluororubber, and urethane rubber. In particular, acrylic elastomers, which are acrylic block polymers, are preferred. The acrylic block polymer is an acrylic block polymer consisting of methyl methacrylate and normal butyl acrylate, which can be produced by living anionic polymerization, and the polymer itself has adhesive properties. Therefore, even if your hands are slightly wet, they are not slippery, and you can grip the handle firmly and tear it securely. The anti-slip layer 105 to be applied to the outer surfaces of the front film 101 and the rear film 102 may be applied only to the cut-out area, or may extend further into the storage section 10, and in some cases may be applied to the entire surface of the pouch.

[0023] In Figures 2-1 and 2-2, there is a sharp cutout portion 1110 with a sharp corner in the top edge cutout 111, and the sharp cutout portion 1110 and the easy-open line 210 cause the handle portion 22 to be pulled toward the front or rear of the pouch, and once tearing begins, the pouch is easily torn toward the side cutout 121. When the grip portion 22 is separated from the pouch, the pouring path 20 opens at the opening portion 21 .

[0024] To make it possible to open the spouting part 2 by cutting off the grip part 22 at the tip of the spouting end, if the grip part surface is rough with an uneven shape formed thereon, together with the non-slip layer, it will be possible to more reliably grab the grip part and tear the opening part 21. The unevenness can be formed by pressing and embossing, but it can also be formed by printing ink containing a core material such as calcium carbonate as a base for applying elastomer, or by raising printing.

[0025] The pouch of the present invention can be used as a standing type pouch as shown in FIG. 1, as well as a three-side sealed type or four-side sealed type pouch, depending on the usage form, content volume, design, etc.

[0026] The basic structure of the laminated film constituting the pouch of the present invention may be a film consisting of a base layer on the outside and a sealant layer on the inside, but it is preferable to provide an intermediate layer such as a barrier layer that improves the storage stability of the contents or a layer that imparts flexibility so that the bag is less likely to break if dropped, etc.

[0027] Examples of the substrate layer include polyethylene terephthalate film, polypropylene film, polystyrene film, nylon film, polycarbonate film, polyacrylonitrile film, polyimide film, etc. There are no particular limitations as long as it has mechanical strength and dimensional stability. In particular, a film obtained by biaxially stretching a crystalline resin is preferable. In addition, a film having an aluminum vapor deposition layer provided on these films may be used.

[0028] In addition, the substrate layer may be provided with a suitable printed layer as necessary. The printed layer is a layer printed with ink made of a binder resin such as a urethane-based, acrylic-based, nitrocellulose-based, or rubber-based resin to which various pigments, extender pigments, plasticizers, drying agents, stabilizers, and the like have been added. As the printing method, for example, a known printing method such as offset printing, gravure printing, flexographic printing, silk screen printing, or inkjet printing may be used. In addition, the adhesion of the printed layer can be improved by previously subjecting the surface of the substrate layer to a corona treatment or ozone treatment as a pretreatment.

[0029] The sealant layer is generally made of a polyolefin resin. Polyolefin resins such as high density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer (EVA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EAA), ionomer, and polypropylene can be used. These resins can be formed into a film using an extruder. It may be a single layer or multiple layers. The thickness of the film is preferably in the range of 50 to 200 μm.

[0030] For the adhesive layer, a dry lamination adhesive can be used. For example, a two-component curing urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, etc. can be used. The lamination method can be a dry lamination method, but it may also be possible to laminate the sealant layer side while forming a film by extruder lamination, or to perform sand polyethylene processing.

[0031] Furthermore, if it is necessary to improve various physical properties of the laminate sheet, for example, when improving the rigidity, drop strength, puncture strength, etc. of the laminate sheet, or when improving the barrier properties for water vapor, oxygen gas, etc., it is possible to provide an intermediate layer. However, it is preferable that the material be one that can be easily weakened or easily broken by processing the easy-open processing line.

[0032] The intermediate layer may be, for example, an aluminum foil, an aluminum-deposited polyester film, an inorganic oxide-deposited polyester film, a polyamide resin, etc. To laminate the intermediate layer, the layers may be attached via an adhesive layer by a dry lamination method.

[0033] Inorganic oxides include silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, and oxide. Metal oxides such as zirconium oxide and yttrium oxide can be used, with silicon oxide, aluminum oxide, magnesium oxide, etc. being preferred from the standpoints of productivity and cost. EXAMPLES

[0034] Specific examples of the present invention and comparative examples will be described below. In both the Examples and Comparative Examples, the laminated films used as the front film, rear film, and bottom intermediate film that make up the pouches were manufactured in a two-layer structure in which a 12 μm thick silicon oxide-deposited polyethylene terephthalate film was bonded to the inner surface of a 15 μm thick biaxially oriented 6-nylon film as the base layer by a dry lamination method using a two-component curing urethane adhesive. Furthermore, a linear low-density polyethylene film (120 μm) was attached to the inner surface as a sealant layer to create a laminated film.

[0035] The front film 101, rear film 102, and bottom intermediate film 141 of the pouch are made by folding a single laminate film 384 mm long and 160 mm wide vertically so that the sealant surfaces meet, resulting in a length (H) of 160 mm and a width (W) of 160 mm. Furthermore, the end portion is used as the bottom intermediate film, and a film with the sealant surface folded outward to a depth h of 16 mm is used between the front film and rear film. (See Figure 4-1) The shapes of the spout and knob parts are the same in all of the examples and comparative examples, as shown in FIG. 4-2. The easy-to-open processing line 210 was processed by scanning a carbon dioxide gas laser having a wavelength of 10.6 μm at an output of 21 watts at a speed of 2500 mm / sec along the planned easy-to-open line shape shown in FIG. 4-2 to process surface scratches.

[0036] In the grip portion 22, the coating agent was applied to both the front film 101 and the rear film 102 at the same positions as shown in FIG. 4-2. The coating agent used was an acrylic block polymer dissolved in ethyl acetate as a solvent. The amount of the coating solution added was varied and evaluated. Comparative Example 1 is uncoated. In Example 1, 1.0 part by weight was added to 99 parts by weight of ethyl acetate. In Example 2, 3.0 parts by weight of ethyl acetate was used, based on 97 parts by weight of ethyl acetate. In Example 3, 15.0 parts by weight of ethyl acetate was used, In Example 4, 35.0 parts by weight of ethyl acetate was used, In Comparative Example 2, the mixture was 50.0 parts by weight relative to 50 parts by weight of ethyl acetate. A solid gravure plate with 175 lines / inch and a plate depth of 25 μm was used, gravure coated, and cut to a length of 200 mm and a width of 80 mm for evaluation.

[0037] <Evaluation method> <Measurement of the smoothness of the knob> The static friction coefficient was measured in accordance with JIS K 7125, Plastics - Films and Sheets - Friction Coefficient Test Method, and this was used to determine the slipperiness. Measuring instrument: Tensilon(R) universal testing machine (tensile / compression testing machine) RTF-2410 manufactured by A&D Co., Ltd. Relative speed of the sliding piece to the friction table: 100mm / min Mass of the slider: 200g (Felt surfaced weight slider used) Test piece: Three sets of test pieces were prepared by using a laminate film measuring 200 mm in length and 80 mm in width and coating the entire surface with each of the above-mentioned various coating agents. The slipperiness was evaluated in two ways: when there was no water on the coating surface, and when the coating surface was wetted by applying 1 g of water, and the results of three runs for each were averaged.

[0038] <Evaluation of tearability of opening part> The tearability was evaluated by wetting hands with water, holding the pouch filled with 130 mL of water and the handle, and tearing the opening. Ten people, five men and five women, evaluated the device, and the number of people who felt that it was difficult to break from a practical standpoint or that it did not break at all was used as the evaluation score.

[0039] <Evaluation of bag making suitability> We placed the laminated film on the bag making machine to check whether bags could be made stably.

[0040] <Evaluation Results> <Measurement results of the smoothness of the knob> The static friction coefficient was measured without applying water to the sliding piece and the handle, and the results were 0.21 for Comparative Example 1, 0.32 for Example 1, 0.41 for Example 2, 0.53 for Example 3, 0.91 for Example 4, and 1.42 for Comparative Example 2. Next, the static friction coefficient was measured by applying 1 g of water to the sliding piece and the gripping part. The result was 0.13 in Comparative Example 1, a significant decrease, but 0.35 in Example 1, 0.45 in Example 2, 0.54 in Example 3, 0.95 in Example 4, and 1.45 in Comparative Example 2, which were the same as or slightly higher than the coefficient without water.

[0041] <Evaluation results of tearability of opening part> Seven out of ten people were unable to tear the package due to slipping in Comparative Example 1. However, in Examples 1, 2, 3, and 4, and Comparative Example 2, which were coated with an acrylic block polymer, the grip did not slip at the tab and the package could be torn open.

[0042] <Evaluation of bag making suitability> In Comparative Example 1, Example 1, Example 2, Example 3, and Example 4, bags could be made in the same way as with ordinary films. However, in Comparative Example 2, bags were difficult to make due to wrinkles and shifting of the film due to poor sliding during the folding process.

[0043] From the above results, it was confirmed that the acrylic block polymer-coated container can be securely grasped at the handle and torn open, and that the amount of additive to be coated should be 1.0% or more and 40.0% or less.

[0044] [Table 1]

[0045] The pouch of the present invention is as described above, and by adding an anti-slip layer mainly composed of a resin-based elastomer to the gripping portion, it can be torn forcefully without slipping even when picked up with wet hands. In addition, since the resin-based elastomer is simply applied in the printing process, it can be manufactured on a general-purpose manufacturing line. In particular, it has great advantages such as not requiring ultraviolet curing equipment or highly accurate positioning. [Explanation of symbols]

[0046] 1...Pouch 10 Storage section 101...Previous film 102... Rear film 103...Base material layer 104...Sealant layer 105 Anti-slip layer 11. Top 111....Top notch 1110 Sharp cutout 12... Left side 121 Side cutout 13 Right side 14... Bottom 141 Bottom film 15....Pour end seal part 2····················································································································································································. 20·······························································. 21......Opening section 210...Easy-to-open processed wire 22....Knob part H...Vertical W: Width h: Folding height

Claims

[Claim 1] A pouch formed by overlapping laminated films and sealing or folding the periphery of the top, left, right and bottom edges to form a storage section therein, The pouring portion is formed from a pouring end seal portion that extends obliquely upward in a protruding manner at the intersection of the adjacent sides, and a pouring path in a non-fused portion surrounded by the pouring end seal portion, and has a pouring portion that can be opened by cutting off a tab portion at the tip of the pouring end, The grip portion has a non-slip layer containing a resin-based elastomer on a surface thereof, The static friction coefficient of the surface of the anti-slip layer in a dry state is 0.32 or more and 0.91 or less, and The pouch is characterized in that the coefficient of static friction when water is applied to the surface of the anti-slip layer is 0.35 or more and 0.95 or less.

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