JP2013095488A - Package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package that is easily opened by a small force without using any finger to take out contents, and has superior manufacturing performance.SOLUTION: A package 1 comprises a packaging bag 2 and sheet materials 3a, 3b bonded to both surfaces of the packaging bag 2. The sheet materials 3a, 3b are bonded to the outer surface of the packaging bag 2 with a bonding part 10a formed along an outer peripheral edge, and the bonding part 10 has larger peeling strength than that of the heat seal part 5 of the packaging bag 2. Both hands are inserted into a gap 13 between the sheet materials 3a, 3b and the packaging bag 2 from an edge 11 to hold contents 9 in such a manner as joining the hands in a prayer, and palms of the right and left hands are put away from each other to open the packaging bag 2 without using any fingertip.

Description

  The present invention relates to a package for packaging foods such as gels, solids, powders, daily necessities, toys and the like.

  As a packaging form when sealing food, feed, daily necessities, toys, etc. in gel, solid, powder, etc. with a packaging film, a resin film having a thermoplastic resin layer laminated on the inner surface side is used. A packaging form is used in which a packaging bag formed by sealing a side is filled with contents and then the filling port is sealed.

  In these packaging forms, the contents are taken out by gripping both sides of an opening notch (notch) formed in the sealing portion at the periphery of the packaging bag and tearing the film. In such a conventional packaging form, there is a problem that a hand is easily slipped when tearing a film and a force is required when tearing.

  Therefore, various packaging bags excellent in unsealing properties have been proposed. For example, Patent Document 1 provides a large number of fine scratches in a staggered manner in a direction substantially perpendicular to the edge of the fused portion of the packaging bag. A packaging bag with improved tearability of the fused portion is disclosed.

  Patent Document 2 discloses a food packaging body in which a bar-shaped member such as a split is housed on the side opposite to the palm seal part of the packaging bag, and the bar-shaped member and the palm seal part are gripped and opened. Further, in Patent Document 3, an opening knob is provided in a region on the edge thermal bonding portion side of the bent portion of the partition wall thermal bonding portion by a cut line that surrounds the bent portion and penetrates the base constituting one surface. An easy-to-open packaging bag is disclosed in which an opening cut line is provided from both ends of the knob along the partition heat-bonding portion and can be opened along the opening cut line from the opening knob.

Japanese Patent No. 2731474 JP 2005-145532 A JP 2008-150111 A

  However, the packaging bag of Patent Document 1 needs to be torn in a predetermined opening direction displayed on the edge, and there is a problem that the opening direction is difficult to understand for children and elderly users. Further, since the method of Patent Document 2 grasps and opens a bar-shaped member such as a split and a palm seal part, it cannot be used when the bar-shaped member is not packaged as an accessory or is not a palm seal type packaging bag. . Further, the packaging bag of Patent Document 3 has a complicated structure, and there is room for further improvement in terms of manufacturability and cost.

  Furthermore, all of the methods of Patent Documents 1 to 3 are for picking and opening one end of a packaging bag with a fingertip. For example, when a user is injured with a finger, it cannot be said that the opening is always easy. .

  In view of the above problems, an object of the present invention is to provide a package that can be easily opened with a light force without using a fingertip and the contents can be taken out, and that is excellent in manufacturability.

  In order to achieve the above object, the present invention provides a storage portion formed of a laminated film including at least a base material layer and a first thermoplastic resin layer that is an innermost layer, in which contents are enclosed, and a peripheral edge of the storage portion A heat-seal part for closing the packaging bag, and a sheet material adhered to the front side and the back side of the packaging bag by means of an adhesive part formed in three directions or two opposite directions of the outer periphery. It is comprised, and at least one part of the said heat seal part is a package with a small peeling strength compared with the said adhesion part.

  According to the present invention, in the package having the above-described configuration, the first thermoplastic resin layer is composed of a plurality of layers having a delamination strength smaller than a peel strength of the adhesive portion.

  According to the present invention, in the package having the above-described configuration, at least a part of the heat seal portion includes a sealant material including a plurality of layers having a delamination strength smaller than a peel strength of the adhesive portion. It is characterized by being formed by interposing.

  Further, the present invention is the packaging body having the above-described configuration, wherein the second thermoplastic resin layer is laminated on the outermost layer of the laminated film, and the third thermoplastic resin is laminated on the inner surface of the second thermoplastic resin layer and the sheet material. The adhesive portion is formed by heat fusion with the resin layer, and the delamination strength of the first thermoplastic resin layer or the delamination strength of the sealant material is the same as that of the second thermoplastic resin layer and the third layer. It is characterized by being smaller than the peel strength when the thermoplastic resin layer is thermally fused.

  Moreover, the present invention is characterized in that, in the package having the above structure, an edge of the sheet material on which the adhesive portion is not formed overlaps the storage portion.

  Moreover, the present invention is characterized in that, in the package body configured as described above, an edge of the sheet material on which the adhesive portion is not formed is curved in a concave shape.

  Moreover, this invention is a package body of the said structure, The said packaging bag is a planar view rectangular shape, The said heat seal part has one side of the same direction as the edge where the said adhesion part of the said sheet | seat material is not formed. The peeling strength of two adjacent sides of the packaging bag is smaller than that of the adhesive portion.

  According to the first configuration of the present invention, since the packaging bag can be opened simply by inserting both hands into the gap between the sheet material bonded to the front side and the back side of the packaging bag and the packaging bag, the fingertip It can be easily opened with a light force without using a wrapping, resulting in a low-cost and excellent manufacturability.

  Moreover, according to the 2nd structure of this invention, in the package of the said 1st structure, as a 1st thermoplastic resin layer of the laminated | multilayer film which comprises a packaging bag, delamination strength is more than the peeling strength of an adhesion part. By using a thermoplastic resin layer composed of a plurality of small layers, it is possible to form a heat-sealed part with a peel strength lower than that of the adhesive part simply by sealing the packaging bag by heat-sealing.

  Moreover, according to the 3rd structure of this invention, when sealing a packaging bag by heat sealing in the package of the said 1st structure, it is more than the peeling strength of an adhesion part in at least one part of a heat seal part. By interposing a sealant material composed of a plurality of layers having low delamination strength between the first thermoplastic resin layers, the position and size of the opening formed when the packaging bag is opened can be arbitrarily changed.

  Moreover, according to the 4th structure of this invention, in the package of the said 2nd or 3rd structure, a 2nd thermoplastic resin layer is laminated | stacked on the outermost layer of a laminated | multilayer film, a 2nd thermoplastic resin layer and a sheet | seat The adhesive portion is formed by heat fusion with the third thermoplastic resin layer laminated on the inner surface of the material, and the delamination strength of the first thermoplastic resin layer or the delamination strength of the sealant material is determined by the second thermoplasticity. By making it smaller than the peel strength when the resin layer and the third thermoplastic resin layer are heat-sealed, an adhesive part that bonds the sheet material and the packaging bag, and at least a part of the peel strength compared to the adhesive part The heat seal portion having a small size can be easily formed by the heat seal method.

  Further, according to the fifth configuration of the present invention, in the packaging body having any one of the first to fourth configurations, the edge where the adhesive portion of the sheet material is not formed overlaps the storage portion. The storage portion is slightly recessed to form a space between the storage portion and the edge, and a hand can be easily inserted into the gap between the storage portion and the sheet material.

  Moreover, according to the 6th structure of this invention, in the package of the said 5th structure, by curving the edge in which the adhesion part of a sheet | seat material is not formed in a concave shape, a storage part and a sheet | seat material The hand can be inserted more easily through the gap.

  According to the seventh configuration of the present invention, in the packaging body having any one of the first to sixth configurations, the packaging bag has a rectangular shape in plan view, and at least an adhesive portion of the sheet material is not formed. The left and right palms are separated with the fingertips of both hands in contact with each other by reducing the peel strength of the heat seal part on two adjacent sides of the packaging bag that includes one side in the same direction as the edge compared to the adhesive part. The packaging bag can be opened in the direction in which the force is most easily applied. Moreover, since the two sides of the packaging bag are peeled off to form a large opening, the contents can be easily taken out.

The top view which shows the state which decomposed | disassembled the package 1 which concerns on 1st Embodiment of this invention. Side surface sectional drawing of the package 1 of 1st Embodiment The figure which shows the procedure which opens the package 1 of 1st Embodiment. Sectional drawing which shows an example of the laminated structure of the laminated film 2a which comprises the packaging bag 2 in the package 1 of 1st Embodiment. Sectional drawing which shows an example of the laminated structure of the sheet | seat material 3a in the package 1 of 1st Embodiment. The top view which shows an example of the packaging bag 2 used for the package 1 which concerns on 2nd Embodiment of this invention. The top view which shows the other example of the packaging bag 2 used for the package 1 of 2nd Embodiment. The top view which shows the state which decomposed | disassembled the package 1 which concerns on 3rd Embodiment of this invention. External perspective view of the package 1 of the third embodiment The top view which shows the state which decomposed | disassembled the modification of the package 1 of this invention The perspective view which shows the other modification of the package 1 of this invention

  Hereinafter, the package of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a state in which the package 1 according to the first embodiment of the present invention is disassembled, and FIG. 2 is a side sectional view of the package 1 of the first embodiment. The packaging body 1 includes a packaging bag 2 and sheet materials 3 a and 3 b that are bonded to both surfaces of the packaging bag 2.

  The packaging bag 2 is formed by heat-sealing four sides of two rectangular laminated films 2a and 2b to form a storage portion 7 surrounded by the heat seal portion 5, and the storage portion 7 has a granular content 9 Is sealed. Since one side of the heat seal portion 5 is used as a filling port for the content 9, the heat seal portion 5 is unsealed before the content 9 is filled, and is heat sealed after the content 9 is filled.

  Sheet material 3a, 3b is adhere | attached on the outer surface of the packaging bag 2 by the adhesion part 10 formed in the substantially U shape along the outer periphery, and formation of the adhesion part 10 between the outer surfaces of the packaging bag 2 is formed. A gap 13 having an edge 11 on one side (the lower side in FIG. 1) that is not formed is formed. The dimension in the longitudinal direction of the packaging bag 2 is shorter than the outer dimension of the packaging bag 2. The edge 11 is curved in a concave shape toward the gap 13 direction. Further, the peel strength of the adhesive portion 10 is set to be stronger than the peel strength of the heat seal portion 5.

  Drawing 3 is a figure showing the procedure which opens package 1 of a 1st embodiment. With reference to FIG.1 and FIG.2, the opening method of the package 1 of this embodiment is demonstrated using FIG. First, as shown in FIG. 3 (a), a hand is inserted from the edge 11 into the gap 13 between the sheet material 3a, 3b and the packaging bag 2, and the contents 9 are wrapped with both hands so as to "gap".

  Next, from the state of FIG. 3 (a), when the left and right palms are slowly separated while the fingertip portions of both hands are in contact, the laminated film 2a of the packaging bag 2 adhered to the sheet materials 3a and 3b, 2b is pulled away. Further, when the left and right hands are separated, as shown in FIG. 3 (b), the heat seal part 5, which has a lower peel strength than the adhesive part 10, is peeled off and the opening 15 is formed in the packaging bag 2. The contents 9 can be taken out from the storage unit 7.

  Since the packaging body 1 of this embodiment can open the packaging bag 2 using the whole palm without using a fingertip, it becomes easy to put force required for opening the packaging bag 2. Therefore, it can be easily opened even when the user is injured by the finger, or when the fingertip force is weak or an elderly person. Moreover, when the content 9 is a powder or a gel-like object, adhesion to the hand or finger at the time of taking out the content 9 can also be prevented.

  Moreover, in the package 1 of this embodiment, the direction of the opening 15 formed in the packaging bag 2 can be determined by the direction in which both hands inserted into the gap 13 are separated. That is, when the fingertip portions of both hands that have palms are separated from the state of FIG. 3A, the packaging bag 2 can be opened from the opposite direction to FIG. 3B. Further, when the thumb side or the little finger side of both hands holding the palms apart, the packaging bag 2 can be opened from the side. However, as shown in FIG. 3B, the method of separating the left and right palms with the fingertip portions of both hands in contact with each other is the most powerful, and the packaging bag 2 can be easily opened.

  FIG. 4 is a cross-sectional view showing an example of the laminated structure of the laminated film 2a constituting the packaging bag 2 in the package 1 of the first embodiment. In addition, although laminated film 2a is demonstrated here, it is the same structure also about laminated film 2b. The laminated film 2 a is formed by laminating the first thermoplastic resin layer 25 that is the innermost layer on one surface of the base material layer 20 via the dry laminate layer 22, and the dry laminate layer on the other surface of the base material layer 20. 22 is a laminate in which the second thermoplastic resin layer 27 that is the outermost layer is laminated via 22.

  Next, each layer constituting the laminated film 2a will be described in detail. Since the base material layer 20 is a basic material constituting the packaging bag 2, it can withstand the conditions of formation, processing, etc., and can favorably hold them without impairing their properties. In the production of the package, it is preferable that it is excellent in processing workability, heat resistance, slipperiness, pinhole resistance, water vapor or gas barrier properties, and other various physical properties.

  As the base material layer 20 used in the present invention, a simple substance such as a uniaxial or biaxially stretched nylon film, a uniaxial or biaxially stretched polypropylene film, a uniaxial or biaxially stretched polyester resin film, or a laminate thereof is used. Or a biaxially stretched polyester resin film is particularly preferably used. Specific examples of the polyester resin film include various polyesters such as polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene-2, 6-naphthalate resin, polybutylene-2, 6-naphthalate, and polycyclohexanedimethylene terephthalate resin. Series resins can be used.

  The uniaxially or biaxially stretched polyester-based resin film uses, for example, one or more of the above-mentioned polyester-based resins, and is formed into a film such as an extrusion method, a cast molding method, a T-die method, a cutting method, and an inflation method A method of forming a film of the above-mentioned various resins alone using a method, or a method of forming a multilayer co-extrusion film using two or more kinds of resins, and further, adding two or more kinds of resins. A polyester-based resin film is manufactured by a method of forming a film by mixing in advance before forming a film, and further stretching in a uniaxial or biaxial direction using, for example, a tenter method or a tubular method. A biaxially stretched polyester resin film can be used. As a film thickness of the base material layer 20, about 3-50 micrometers is preferable, More preferably, about 5-30 micrometers is desirable.

  When forming the base material layer 20, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slip properties, mold release properties, flame retardancy, antifungal properties, etc. Various plastic compounding agents and additives can be added for the purpose of improving and modifying properties, electrical characteristics, strength, etc. Depending on the case, it can be added arbitrarily. In the above, as a general additive, for example, a lubricant, a crosslinking agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a filler, a reinforcing agent, an antistatic agent, a pigment, and the like can be used. In this case, a modifying resin or the like can also be used.

  Note that an antistatic coat layer may be provided on the surface of the base material layer 20 in order to prevent problems associated with the generation of static electricity and improve the suitability for laminating, bag making, filling and packing, and the like. As a method for forming the antistatic coating layer, for example, a resin is used as a main component of the vehicle, and one or more antistatic agents are added thereto, and further, a plasticizer, a stabilizer, and an antioxidant are added as necessary. Add one or more additives such as additives, light stabilizers, UV absorbers, curing agents, crosslinking agents, lubricants, fillers, colorants, etc., and knead thoroughly with solvents, diluents, etc. To prepare a resin composition. Next, the resin composition is used, and this is coated or printed on the surface of the base material layer 20 by using a normal coating method or a printing method to form an antistatic coating layer.

  Antistatic agents include, for example, anionic surfactants, cationic surfactants, nonionic surfactants, surfactants such as amphoteric surfactants, inorganic antistatic agents such as metal powder and carbon, silicone One or more selected from antistatic agents, higher fatty acids and esters thereof, acid amides, salts, paraffinic hydrocarbons, waxes and the like can be used.

  Examples of the vehicle resin include polyethylene resins, polypropylene resins, ethylene-propylene copolymers, polyvinyl chloride resins, polyvinyl acetate resins, polyacrylonitrile resins, polystyrene resins, acrylonitrile-styrene copolymers. (AS resin), acrylonitrile-butadiene styrene copolymer (ABS resin), acrylic or methacrylic resin, polycarbonate resin, alkyd resin, phenolic resin, maleic resin, natural resin, hydrocarbon resin, polyvinyl butyral One or two selected from resins, polyamide resins, polyester resins, polyurethane resins, epoxy resins, urea resins, melamine resins, aminoalkyd resins, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, etc. It is possible to use more than.

  It should be noted that one or more of the antistatic agents as described above are added to the polyester resin pellets that are the raw material of the base material layer 20, kneaded sufficiently, and then formed into a film. Antistatic properties can also be imparted to the material layer 20.

  The first thermoplastic resin layer 25 may be any material that can be melted by heat to fuse the laminated films 2a and 2b to each other. However, when the packaging bag 2 is opened, the packaging bag 2 and the sheet materials 3a and 3b In order not to peel off, the heat seal portion 5 formed by heat fusion of the first thermoplastic resin layer 25 has a third heat laminated on the inner surface side of the second thermoplastic resin layer 27 and the sheet materials 3a and 3b. It is necessary to reduce the peel strength as compared with the adhesive portion 10 formed by heat-sealing with the plastic resin layer 29 (described later).

  Therefore, as the first thermoplastic resin layer 25, an EPR film composed of a plurality of layers having delamination properties is used, and by reducing the delamination strength of the first thermoplastic resin layer 25 compared to the adhesive portion 10, heat The peel strength of the seal part 5 can be reduced as compared with the adhesive part 10. An example of the EPR film is CMPS013C (trade name) manufactured by Tosero Chemical Co., Ltd.

  In addition, for example, workability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc. are improved and modified. For this purpose, one or more of the above-mentioned antistatic agents are added to the melt-extruded resin constituting the first thermoplastic resin layer 25, and various plastic compounding agents and additives are added during film formation. An agent or the like can be added. Examples of general additives include lubricants, crosslinking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, and the like. Resin etc. can also be used.

  The second thermoplastic resin layer 27 may be any material that can be melted by heat to fuse the laminated film 2a and the sheet material 3a, and the laminated film 2b and the sheet material 3b to each other. Density polyethylene, high density polyethylene, linear (linear) low density polyethylene, ethylene / α-olefin copolymer polymerized using metallocene catalyst (single site catalyst), polypropylene, ethylene / vinyl acetate copolymer, Acrylic acid such as ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polyethylene or polypropylene Methacrylic acid, maleic anhydride, fumaric acid, etc. It one not selected from modified acid-modified polyolefin-based resin such as a sum-carboxylic acid may be used or two or more kinds.

  Among these, linear low density polyethylene, low density polyethylene, medium density polyethylene, and ethylene / vinyl acetate copolymer are particularly preferable in terms of heat sealability. The thickness of the second thermoplastic resin layer 27 is preferably about 10 μm to 100 μm.

  The dry laminate layer 22 prevents the occurrence of delamination by firmly adhering the base material layer 20, the first thermoplastic resin layer 25, and the second thermoplastic resin layer 27 constituting the laminated film 2a. It is. Examples of the laminating adhesive constituting the dry laminating layer 22 include polyester polyol-isocyanate adhesive, polyvinyl acetate adhesive, homopolymers such as ethyl acrylate, butyl, 2-ethylhexyl ester, or the like. And polyacrylic acid ester adhesives composed of copolymers of methyl methacrylate, acrylonitrile, styrene, etc., cyanoacrylate adhesives, ethylene and vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid and other monomers Ethylene copolymer adhesive made of copolymer, cellulose adhesive, polyester adhesive, polyamide adhesive, polyimide adhesive, amino resin adhesive made of urea resin or melamine resin, phenol resin Adhesive, epoxy adhesive, poly Inorganic adhesives such as rubber adhesives made of ethane adhesives, reactive (meth) acrylic adhesives, chloroprene rubber, nitrile rubber, styrene-butadiene rubber, silicone adhesives, alkali metal silicates, low melting glass, etc. An adhesive or the like can be used. Among these, a polyester polyol-isocyanate adhesive is preferable.

The composition system of the above-mentioned adhesive may be any composition form such as an aqueous type, a solution type, an emulsion type, and a dispersion type, and the property is any of film / sheet form, powder form, solid form, etc. Further, the bonding mechanism may be any of a chemical reaction type, a solvent volatilization type, a heat melting type, and a hot pressure type. As a method for forming the dry laminate layer 22, the above laminating adhesive is applied to one side of both layers by, for example, a coating method such as a roll coating method, a gravure roll coating method, a kiss coating method, or a printing method. Then, it can be formed by drying a solvent or the like, and the coating or printing amount is preferably about 0.1 to 10 g / m ^{2 in} a dry state.

  Note that, depending on the type and nature of the contents 9 stored in the packaging bag 2 or the necessity of imparting design properties to the packaging bag 2, between the base material layer 20 and the first thermoplastic resin layer 25. Further, a printing layer, a barrier layer, an intermediate layer, and the like can be laminated. The print layer forms a desired print pattern such as characters, figures, symbols, and patterns between the base material layer 20 and the first thermoplastic resin layer 25. As a method for forming a printing layer, one or more of normal ink vehicles are used as a main component, and a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a curing agent, and a crosslink as necessary. Add one or more additives such as additives, lubricants, antistatic agents, fillers, etc., add colorants such as dyes and pigments, and knead thoroughly with solvents, diluents, etc. Adjust the ink composition. And using this ink composition, a desired printing pattern is printed on the back surface of the base material layer 20 by a printing method such as gravure printing, offset printing, letterpress printing, screen printing, transfer printing, flexographic printing, etc. Form.

  The barrier layer imparts a high water vapor barrier property and gas barrier property to the packaging bag 2 when the contents to be enclosed are easily altered by moisture or oxygen. As the barrier layer, basically, a metal foil or a vapor-deposited film on which a metal or a metal oxide is vapor-deposited can be used. Examples of the material include silicon (Si), aluminum (Al), and magnesium ( Metals such as Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium (Ti), lead (Pb), zirconium (Zr), yttrium (Y) Alternatively, an oxide thereof can be used. Preferable examples include aluminum foil, aluminum vapor-deposited polyester film, and silica vapor-deposited polyester film.

  The thickness of the barrier layer is 5 to 30 μm when the barrier layer is a metal foil, and varies depending on the type of metal or metal oxide used when it is a deposited film, but is preferably about 50 to 2000 mm, for example. Is preferably selected and formed within a range of 100 to 1000 mm. Moreover, the metal or metal oxide used as a barrier layer can be used in 2 or more types of mixtures, and the vapor deposition film | membrane of the metal or metal oxide mixed by the dissimilar material can also be comprised.

  When the packaging bag 2 is subjected to severe physical or chemical conditions, the intermediate layer has high sealing performance, puncture resistance (pinhole resistance), heat resistance, light resistance, quality maintenance, work Imparts hygiene and hygiene.

  Examples of the intermediate layer include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, and ethylene-ethyl acrylate copolymer. Polymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, poly (Meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene styrene copolymer (ABS resin), polyester resin, polyamide resin, Police car Any known resin film or sheet such as nate resin, polyvinyl alcohol resin, saponified ethylene-vinyl acetate copolymer, fluorine resin, diene resin, polyacetal resin, polyurethane resin, nitrocellulose, etc. Can be used.

  The film or sheet may be any of unstretched and uniaxially or biaxially stretched. Preferable examples include a stretched polyester film and a stretched nylon film. In addition, a light-shielding film or sheet obtained by adding a desired additive such as a colorant or an ultraviolet absorber and kneading to form a film can also be used.

  In addition, although the thickness of an intermediate | middle layer is arbitrary, it can select and use from the range of about several micrometers-300 micrometers. There are no particular restrictions on the lamination position of the intermediate layer as long as it is between the base material layer 20 and the first thermoplastic resin layer 25. For example, the lamination order of the barrier layer and the intermediate layer may be switched.

  If the typical structure of the laminated | multilayer film 2a is illustrated, it will be an ERP film (30 micrometers, 1st thermoplastic resin layer 25) / polyester polyol-isocyanate adhesive (dry laminate layer 22) / biaxial in order from the innermost layer side. Examples thereof include a stretched polyethylene terephthalate film (12 μm, base material layer 20) / polyester polyol-isocyanate adhesive (dry laminate layer 22) / linear low-density polyethylene film (30 μm, second thermoplastic resin layer 27). .

  FIG. 5 is a cross-sectional view showing an example of the laminated structure of the sheet material 3a in the package 1 of the first embodiment. The sheet material 3 a is obtained by laminating a third thermoplastic resin layer 29 on one surface of a base material 30 via a dry laminate layer 22. Although the sheet material 3a will be described here, the sheet material 3b has the same configuration.

  The base material 30 should just be the material which forms the clearance gap 13 which inserts a palm between the outer surfaces of the packaging bag 2, and does not fracture | rupture by the force which acts at the time of opening of the packaging bag 2. FIG. As the base material 30, paper materials such as coated paper can be used in addition to the resin film similar to the base material layer 20 described above. The third thermoplastic resin layer 29 forms the adhesive portion 10 by heat-sealing with the second thermoplastic resin layer 27 described above, and the same resin as the second thermoplastic resin layer 27 is used. it can.

  If the typical structure of the sheet | seat material 3a is illustrated, a linear low density polyethylene film (30 micrometers, 3rd thermoplastic resin layer 29) / polyester polyol-isocyanate adhesive (dry laminate layer) in order from the innermost layer side. 22) / biaxially stretched polyethylene terephthalate film (12 μm, substrate 30).

  Next, the manufacturing method of the package 1 of this embodiment is demonstrated. First, a laminated film having a laminated structure as shown in FIG. 4 and sheet materials 3a and 3b having a laminated structure as shown in FIG. 5 are manufactured and wound into a roll.

  Next, the long laminated film wound in a roll shape is successively fed out and cut by a slitter (not shown) while being folded in two in the longitudinal direction, and divided into laminated films 2a and 2b. At this time, the first thermoplastic resin layer 25 faces down in the laminated film 2a, and the first thermoplastic resin layer 25 faces up in the laminated film 2b. The laminated films 2a and 2b slit in advance to a predetermined width may be fed out from separate rolls.

  Next, the long sheet materials 3a and 3b wound in a roll shape are fed out, and the sheet material 3a is placed outside the laminated film 2a, the sheet material 3b is placed outside the laminated film 2b, and the third thermoplastic resin layer. 29 is overlapped so as to face the second thermoplastic resin layer 27. Then, the laminated film 2a and the sheet material 3a, and the laminated film 2b and the sheet material 3b are heat-sealed to form the adhesive portion 10.

  Further, the inner surfaces of the laminated film 2a to which the sheet material 3a is bonded and the laminated film 2b to which the sheet material 3b is bonded are heat sealed to form the heat seal portion 5. Note that one side of the laminated films 2a and 2b is not heat-sealed and is left as an unsealed portion.

  As a heat sealing method, for example, a known method such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, or an ultrasonic seal can be used. In this way, a semi-finished product of the package 1 in which the heat seal part 5 is formed in three directions leaving an unsealed part is manufactured. Moreover, if the adhesive part 10 is made the same shape as a part of the heat seal part 5 so that the adhesive part 10 overlaps the heat seal part 5, the laminated film 2a and the laminated film 2b, the laminated film 2a and the sheet material 3a, The film 2b and the sheet material 3b can be heat-sealed at a time.

  Finally, the contents 9 are filled from the unsealed portion into the storage portion 7, and the unsealed portion is heat-sealed, whereby the package 1 as shown in FIG. 2 is obtained. The packaging body 1 of the present embodiment thus obtained is used as a packaging material for foods such as gels, solids, and powders, cosmetics, detergents, daily necessities, toys, etc. The package which has the outstanding characteristic of this can be provided.

  FIG. 6 is a plan view of the packaging bag 2 used in the packaging body 1 according to the second embodiment of the present invention. In the present embodiment, the first thermoplastic resin layer 25 of the laminated films 2 a and 2 b constituting the packaging bag 2 is formed of the same resin material as the second thermoplastic resin layer 27 and the third thermoplastic resin layer 29. Yes. And the sealant material 40 which consists of several layers whose interlayer peeling strength is smaller than the peeling strength of the adhesion part 10 is formed between the first thermoplastic resin layers 25 on the three sides of the packaging bag 2 (left and right sides and lower sides in FIG. 6). The heat seal part 5 is formed by interposing. Since the other laminated structure of the laminated films 2a and 2b, the laminated structure of the sheet materials 3a and 3b, and the manufacturing process of the package 1 are the same as those in the first embodiment, the description thereof is omitted.

  Also in the package 1 of the present embodiment, as shown in FIG. 3, the entire palm is inserted into the gap 13 between the sheet material 3 a, 3 b and the packaging bag 2 and separated from each other. Since the sealant material 40 having low delamination strength is delaminated to form the opening 15 in the packaging bag 2, the contents 9 can be taken out from the storage unit 7. As the sealant material 40, an EPR film similar to the first thermoplastic resin layer 25 of the first embodiment can be used. For example, a material obtained by cutting CMPS013C manufactured by Tosero Chemical Co., Ltd. into a tape shape can be used. it can.

  According to the configuration of the present embodiment, the position and size of the opening 15 formed in the packaging bag 2 can be arbitrarily changed by changing the position where the sealant material 40 is interposed. For example, when the content 9 stored in the storage unit 7 is a solid material (see FIG. 9) such as daily necessities or toys, sealant materials 40 are interposed on the lower side and both sides of the heat seal unit 5 as shown in FIG. When the three sides of the packaging bag 2 are peeled off to form a large opening 15, the contents 9 can be easily taken out. When the contents 9 are granular (see FIG. 1) or powder, the sealant material 40 is interposed only on the lower side of the heat seal portion 5 and only one side of the packaging bag 2 is peeled to form the opening 15. If it is made, scattering of the content 9 can be prevented.

  The position where the sealant material 40 is interposed may be determined in accordance with the direction of the edge 11 of the sheet material 3a, 3b. For example, as shown in FIG. 3, when the packaging bag 2 is opened by separating the left and right palms with the fingertip portions of the palms in contact with each other in contact, the heat seal portion 5 at least in the same direction as the edge 11. It is necessary to interpose the sealant material 40 over the entire area of one side. Moreover, as shown in FIG. 7, if the sealant material 40 is interposed over the two adjacent sides (lower side and right side in FIG. 7) of the packaging bag 2 including the same direction as the edge 11 of the sheet material 3a. The packaging bag 2 can be opened with a light force, and a large opening 15 can be formed.

  FIG. 8 is a plan view showing a state in which the packaging body 1 according to the third embodiment of the present invention is disassembled, and FIG. 9 is an external perspective view of the packaging body 1 of the third embodiment. In this embodiment, sheet material 3a, 3b is adhere | attached on the outer surface of the packaging bag 2 by the adhesion part 10 formed in two sides (FIG. 8 both sides) which oppose. Moreover, in this embodiment, the example which packaged the solid content 9 is shown. Since the structure of the other part of the package 1 is the same as that of 1st Embodiment, description is abbreviate | omitted.

  Also in the present embodiment, as in the first embodiment, by inserting a hand from the edge 11 into the gap 13 between the sheet material 3a, 3b and the packaging bag 2, the packaging bag 2 is removed in the procedure shown in FIG. Can be opened easily.

  In addition, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the laminated structure of the laminated films 2a and 2b shown in FIG. 4 is a preferable example. For example, when the bonding portion 10 with the sheet materials 3a and 3b is formed by a method other than heat sealing such as hot melt bonding, What is necessary is just a laminated structure including at least the base material layer 20 and the first thermoplastic resin layer 25 which is the innermost layer.

  Moreover, the packaging bag 2 used for the packaging body 1 of the present invention is not limited to the four-side seal type as shown in each of the above embodiments, and for example, a three-side seal type packaging bag 2 can also be used. Furthermore, the shape of the package 1 is not limited to a rectangular shape, and may be a circular shape as shown in FIG. 10 or any other shape.

  Moreover, as shown in FIG. 11, the sheet | seat materials 3a and 3b can also be formed by bend | folding one sheet | seat into a mountain shape. Note that the edge 11 of the sheet material 3a, 3b does not necessarily have to be curved in a concave shape. If the edge 11 is formed so as to overlap the storage portion 7 as shown in FIG. A space is formed between the storage portion 7 and the edge 11 by being slightly recessed, and a hand can be easily inserted into the gap 13 from this space.

  Moreover, the manufacturing method of said package 1 is only a preferable example, for example, as a manufacturing method of laminated film 2a, 2b and sheet material 3a, 3b, the laminating method used when manufacturing a normal packaging material, for example, A wet lamination method, a solventless lamination method, a coextrusion lamination method, an inflation method, and other methods can also be used.

  Further, when the above layers are laminated, if necessary, pretreatment such as anchor coating treatment, corona discharge treatment, ozone treatment, flame treatment, blast treatment, etc. can be optionally applied to the surface of the substrate to be laminated. .

  INDUSTRIAL APPLICABILITY The present invention can be used for a packaging bag that wraps food, cosmetics, detergents, daily necessities, toys and the like in the form of gels, solids, and powders as contents. By utilizing the present invention, it is possible to provide a package that can be easily opened without using a fingertip, and can be easily formed at low cost.

DESCRIPTION OF SYMBOLS 1 Packing body 2 Packaging bag 2a, 2b Laminated film 3a, 3b Sheet material 5 Heat seal part 7 Storage part 9 Contents 10 Adhesion part 11 Edge 13 Crevice 15 Opening part 20 Base material layer 21 Print layer 22 Dry laminate layer 23 Barrier Layer 24 Intermediate layer 25 First thermoplastic resin layer 27 Second thermoplastic resin layer 29 Third thermoplastic resin layer 30 Base material 40 Sealant material

Claims (7)

A storage part formed of a laminated film including at least a base material layer and a first thermoplastic resin layer that is an innermost layer, in which contents are enclosed,
A heat seal part for closing the periphery of the storage part;
A packaging bag having
A sheet material adhered to the front side and the back side of the packaging bag by an adhesive portion formed in three directions or two opposite directions of the outer peripheral edge,
At least a part of the heat seal part has a smaller peel strength than the adhesive part.   2. The package according to claim 1, wherein the first thermoplastic resin layer includes a plurality of layers having a delamination strength smaller than a peel strength of the adhesive portion.   At least a part of the heat seal portion is formed by interposing a sealant material composed of a plurality of layers having a delamination strength smaller than the peel strength of the adhesive portion between the first thermoplastic resin layers. The package according to claim 1. A second thermoplastic resin layer is laminated on the outermost layer of the laminated film, and the adhesive portion is formed by thermal fusion between the second thermoplastic resin layer and a third thermoplastic resin layer laminated on the inner surface of the sheet material. As it is formed,
The delamination strength of the first thermoplastic resin layer or the delamination strength of the sealant material is smaller than the delamination strength when the second thermoplastic resin layer and the third thermoplastic resin layer are heat-sealed. The package of Claim 2 or Claim 3 characterized by the above-mentioned.   The package body according to any one of claims 1 to 4, wherein an edge of the sheet material on which the adhesive portion is not formed overlaps the storage portion.   The package body according to claim 5, wherein an edge of the sheet material on which the bonding portion is not formed is curved in a concave shape.   The packaging bag has a rectangular shape in plan view, and the heat seal part includes at least one side of the sheet material in the same direction as the edge where the adhesive part is not formed. The package according to any one of claims 1 to 6, wherein is smaller than the adhesive portion.

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