JP2005162291A - Partitioned packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a partitioned packaging bag capable of separately storing two or more kinds of materials and mixing them when in use without unsealing the packaging bag, free from a fear of both materials mixing during transportation and storage, and capable of easily mixing them when in use. <P>SOLUTION: The partitioned packaging bag consists of thermoplastic resin films 2a and 2b forming a bag body 3 and a partition film 4 for partitioning the bag body. The partition film 4 is formed by overlapping two ribbon-like materials having a heat-sealable layer and a weak heat-sealable layer with the weak heat-sealable layers inside and thermally fusion-bonding one of side rims. The partition film 4 is provided across two sides of the bag body 3, and the heat-sealable layer on the side of a free side rim is thermally fusion-bonded to the internal surface of the thermoplastic resin films 2a and 2b of the bag body 3 along the free side rim, thereby forming the partitioned packaging bag 1 having the bag body 3 with its inside partitioned. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fraction packaging bag. More specifically, the present invention relates to a fraction packaging bag in which two or more kinds of contents can be divided and stored and mixed without opening the packaging bag at the time of use.

  In recent years, there are an increasing number of packages in which two or more kinds of drugs and foods are divided and packaged and mixed before use. For example, a caulking agent and an adhesive are divided into a main agent and its curing agent and mixed together before use. Moreover, in foodstuffs, ingredients and seasonings are divided and packaged, and seasoned together before serving. By dividing each of the materials and packaging them independently, the contents can be stored for a long time without alteration.

  However, in use, it is difficult to mix the stored liquid material in a flexible bag. When mixing, it is necessary to prepare a rigid container and transfer it to the container for mixing. Yes, it took time.

  Therefore, a bag has been developed in which a partition is formed inside the bag body, each material is accommodated in each chamber, and the bag body is broken and mixed without opening the bag body before being used ( Patent Documents 1 and 2).

  However, in these fraction bags, a partition is formed by joining films forming a bag body with an easy-peel film interposed therebetween. The method of joining bag films has a problem in that it is difficult to balance strength when it is necessary to maintain a fraction for transportation and storage and when a partition is to be destroyed for use. That is, if a partition with a strong adhesive strength is used to prevent the partition from breaking during transportation, it will be difficult to open the partition during use, and a partition with a weak adhesive strength will be used. If this is done, when a large number of containers are packed and transported, there arises a problem that the partition breaks due to the load of the upper bag or due to vibration and shock during transportation.

  However, when the thin film easy-peel film is sandwiched and the bag films on both sides are joined together, when the material is stored inside the bag body, the bag storage portion becomes thicker. Since the partition part cannot swell and remains in a thin state, if a load is applied to the package body, the internal pressure of the package body increases and it becomes a force to spread the bag body wall. It acts and the partition is easily broken during transportation.

  Further, since the fractionated chambers are sealed with a bag film, each chamber is independent and capacity cannot be accommodated between the chambers. When the chambers are independent, when the liquid is filled, the heights of the chambers are different and uneven, and if they are stacked in a box, the internal pressure increases due to the unilateral load on the thicker chamber side. Since the pressure in the other chambers remains low, there is a problem that a force is applied to the partition and the partition breaks during transportation.

  In addition, when the two sides of the bag film are joined together with a thin-walled easy-peel film sandwiched between them, the surface becomes wavy, so that when packaging a large number of packages, they can be stored stably and in good shape. Some problems are not possible.

Therefore, it is stable during transportation and will not be damaged even if it is subjected to load or vibration. In use, it is required to develop a fraction packaging bag that can be easily broken and mixed. ing.
JP-A-9-221150 Japanese Patent Laid-Open No. 9-221176

  The present invention divides and stores two or more kinds of materials, enables mixing of materials without opening the packaging bag at the time of use, and there is no possibility of mixing materials during transportation and storage. Provides a fraction packaging bag that can be easily fitted.

The present invention has been made as a result of intensive studies to solve such problems. Specifically,
A thermoplastic resin film constituting the bag body and a fraction film for fractionating the bag body. The fraction film is a ribbon-like body in which a heat seal layer and a weak heat seal layer are laminated. The sealing layer is overlapped and one side edge is heat-sealed, and the fractional film is disposed across the two sides of the bag, and the free side edge of the heat sealing layer is on the side. The present invention provides a fraction packaging bag characterized in that a bag body is formed by fractionating the inside by thermally fusing the inner surface of a thermoplastic resin film constituting the bag body along the edge.

  Further, the present invention provides the above-described fraction packaging bag having a heat-sealing strength between weak heat-seal layers of 100 to 600 g / 15 mm, the film constituting the bag body and the fraction film having an olefin polymer as a main component. The above-mentioned fraction packaging bag made of a thermoplastic resin, the above-mentioned fraction packaging bag in which the weak heat seal layer of the fraction film is blended with an olefin polymer or an inorganic filler or a different resin, and the fraction film The above-mentioned fraction packaging bag in which a gas barrier layer is interposed between the heat seal layer and the weak heat seal layer is provided.

  Furthermore, the present invention provides the above-described fraction packaging bag in which the fraction film is disposed across the opposite sides of the bag body, and the opening of the bag body is formed on the opposite side across the fraction film. The above-described fraction packaging bag and the above-mentioned fraction packaging bag in which the opening of the bag body is formed on one side in the direction intersecting with the fraction film are provided.

  Two or more types of materials can be divided and stored, and can be mixed without opening the packaging bag at the time of use. Also, when the material is filled, the bag body maintains a flat shape. There is no significant load on the chamber, and the capacity is shared between the divided chambers.In particular, the internal pressure is equalized even when a biased load is applied, and force is applied to the partition film forming the partition. Since it does not hang, it can be transported safely.

  As shown in FIG. 1, the fraction packaging bag 1 of the present invention includes a bag body 3 formed by a pair of thermoplastic resin films 2 a and 2 b, and a fraction film 4 is mounted inside the bag body 3. 3 is partitioned into a plurality of chambers 3a and 3b.

  There is no restriction | limiting in particular about the structure of the fraction packaging bag 1, According to the objective, it can select arbitrarily, In FIG. 1, the fraction packaging bag 1 has piled up a pair of thermoplastic resin films 2a and 2b. The two side edges are heat-sealed to form the fused portions 6a and 6b, whereby the fraction packaging bag 1 is formed of two chambers opened up and down. In addition, it can also be set as a back-up type and can also be set as the fraction packaging bag 1 formed with folds on both sides (not shown).

The thermoplastic resin for forming the fractionated packaging bag 1 of the present invention is not particularly limited and can be widely selected according to the purpose. In general, the high-pressure method low-density polyethylene, linear low-density polyethylene, Polyolefins such as high-density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon 6 and nylon 66, and the like can be used. Among these, polyolefin and polyamide are desirable, and in particular, the inner surface of the packaging bag 1 has a density of 0.91 to 0.93 g / mm ³ , a low density polyethylene of MFR 0.1 to 40 g / 10 min, or a density of 0.88 to 0. It is desirable to use a linear low density polyethylene of .94 g / mm ³ and MFR 0.1 to 40 g / 10 min.

  The thermoplastic resin film 2 can be used as a single layer of the above-mentioned resin, but as a laminated film in which a plurality of thermoplastic resin layers are laminated for the purpose of reinforcement, makeup, or improvement of heat-fusibility. Can be used. For example, the outer surface may be a layer of a resin with less scratches, a glossy resin, or a resin with excellent mechanical strength, and the inner surface may be a heat-sealable resin layer.

  For example, as shown in FIG. 2A, the outer layer 11 is a resin layer with high mechanical strength such as polyamide, biaxially stretched polypropylene film layer, high-density polyethylene layer, or linear low-density polyethylene, and the inner layer 12 is high-pressure. By using a heat-sealable resin layer such as a low-density polyethylene layer or a linear low-density polyethylene layer, a heat-sealable film having strength can be obtained.

  Moreover, the film which provided gas barrier property according to the objective is used. For example, the outer layer 11 is a layer having a high gas barrier such as a biaxially stretched polypropylene film layer, a polyester layer, or a polyamide layer, and a heat-sealable polyolefin is laminated as the inner layer 12 to thereby provide a gas barrier property and a heat seal property. Can be obtained.

  Further, as shown in FIG. 2B, a laminated film in which the outer layer 11 is a protective layer excellent in strength and gloss, the inner layer 12 is a heat-sealable layer, and a gas barrier layer is formed on the intermediate layer 13 is used. be able to.

  As a material for forming the heat sealable layer, high-pressure low-density polyethylene, linear low-density polyethylene, or ethylene-propylene copolymer, linear low-density polyethylene polymerized using a metallocene catalyst, or ethylene A vinyl acetate copolymer can be used, and as the gas barrier layer, biaxially stretched polypropylene, polyester, polyamide, saponified polyvinyl alcohol, aluminum vapor deposition film, aluminum foil, or the like can be used.

  Various additives can be added to these thermoplastic resins depending on the purpose. Specifically, antioxidants such as phenols and organic phosphites, such as organic phosphorus and thioethers; hindered amines and other light stabilizers; benzophenones, benzotriazoles, benzoates, and other ultraviolet absorbers; nonions System, cationic system, anionic system antistatic agent; bisamide system, wax system, organic metal salt system dispersant, etc .; alkaline earth metal salt carboxylate system, etc .; amide system, wax system, Examples include organic metal salt-based and ester-based lubricants; hydrazine-based, amine-acid-based metal deactivators; inorganic, organic antibacterial agents, plasticizers, and the like.

  These additives are blended in the process of producing a material composition by appropriately combining them. The blending of the additive may be prepared by mixing at a predetermined ratio using a kneading device such as a conventional known twin screw extruder, Banbury mixer, kneader, mixing roll, and melt-kneading the mixture. A so-called master batch having a high concentration may be prepared and used after being diluted.

  As a means for forming a laminated film, there is a method in which one preformed film and the other film are joined by heat or a hot melt agent, or a thermoplastic resin that forms the other layer on one preformed film is extruded. It can be carried out by appropriately selecting from known methods such as a laminating method or a method of extruding as a laminated film by a multilayer coextrusion method.

  The thickness of the thermoplastic resin film can be arbitrarily selected according to the purpose, but is generally about 30 to 200 μm, preferably about 60 to 100 μm.

  As shown in FIG. 1, the present invention is characterized in that a fractionation film 4 is attached so as to fractionate a chamber of a bag body 3 inside a fraction packaging bag 1.

  As shown in FIG. 3A, the fractional film 4 is formed by laminating a heat seal layer 15 and a weak heat seal layer 16 to form a ribbon-like body 17, which is weakly heated as shown in FIG. The two layers are overlapped with the sealing layer 16 in the middle, and one side edge of the ribbon-like body 17 is heat-sealed along the side edge 17a to form the fraction film 4. In this case, the heat seal between the weak heat seal layers 16 has a suppressed strength, and is generally 100 to 600 g / 15 mm, preferably 200 to 400 g / 15 mm.

As shown in FIG. 4, the width of the ribbon-like body 17 is such that the sum of the distances a ₁ and a ₂ between the heat seal portions on both sides of the ribbon-like body 17 is filled with the material in the fraction packaging bag 1. The width is approximately equal to or slightly larger than the assumed thickness b of the fraction packaging bag 1. The width of heat fusion is not particularly limited, but is generally about 1.0 to 8.0 mm.

  For the heat seal layer 15 of the ribbon-like body 17, a thermoplastic resin that can be thermally welded to the thermoplastic resin film 2 forming the bag body 3 is used. The high-pressure method low-density polyethylene, linear low-density polyethylene, Polyethylene polymers such as density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon 6 and nylon 66, and the like are used. A polyolefin polymer is particularly preferable.

  The weak heat seal layer 16 is formed of a thermoplastic resin that provides a heat seal having a low strength with respect to the heat seal strength between the heat seal layer 15 and the thermoplastic resin film 2.

  As the thermoplastic resin having a low heat seal, a high melting point resin can be used, and polypropylene, polyester, and polyamide can be used.

  Moreover, the thermoplastic resin in which the thermal welding has low strength can be obtained by dispersing an inorganic filler in the thermoplastic resin. As an inorganic filler, in an inorganic powder system, natural systems such as silica, talc, mica, clay, and calcium carbonate, magnesium carbonate, calcium hydroxide, titanium oxide, zinc oxide, alumina, zeolite, carbon black, graphite, etc. In the organic powder system, phenol resin powder, ebonite powder and the like can be mentioned.

  Moreover, the heat fusion strength can be suppressed by adding a different resin. For example, an olefin polymer is impregnated with a vinyl monomer and then subjected to polymerization conditions to knead the composite resin obtained. And can be obtained by dispersing.

  As the olefin polymer impregnated with the vinyl monomer, an olefin polymer such as high-pressure method low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, ethylene / propylene block copolymer, and the like can be used. As the monomer, styrene monomers such as styrene, α-methylstyrene, monochlorostyrene, p-methylstyrene, and ethylstyrene, and acrylic monomers such as acrylic acid and acrylic acid ester can be used. . The impregnation amount of the vinyl monomer is 10 to 80 parts by weight, preferably 20 to 80 parts by weight, based on 100 parts by weight of the olefin polymer.

  Further, a gas barrier layer can be formed on the ribbon-like body 17 according to the purpose, and the same resin as the gas barrier layer of the bag body 3 is used as the thermoplastic resin forming the gas barrier layer. Usually, it is provided between the heat seal layer 15 and the weak heat seal layer 16. The obtained fractional film 4 is arranged across two sides inside the bag body, and the free edge side, that is, the heat seal layer on the side edge opposite to the side edge where the weak heat seal layers 16 are joined to each other. 15 is heat-sealed to the inner surface of the thermoplastic resin film 2 of the bag 3 along the free side edge.

  The fractionation film 4 is disposed across two sides of the side edge of the bag body 3 so as to fractionate the bag body 3. In FIG. 1, the bags 3 are horizontally mounted on opposite sides of the bag 3, and the chambers 3 a and 3 b are formed vertically with the fraction film 4 in the middle, and the openings 20 a and 20 b are opposed to each other with the fraction film 4 interposed therebetween. It is formed on the side to be.

  Moreover, the fractionation film 4 can be mounted in a direction orthogonal to the opening 20c of the bag 3 as shown in FIG. By disposing the fraction film 4 in a direction perpendicular to the opening 20, when filling the material into the chambers 3a and 3b, the bag body 3 can be filled from the same direction without being inverted, Further, the bag body 3 can be fractionated into three or more. In addition, as shown in FIG. 6, the fraction film 4 can also be arrange | positioned diagonally ranging over 2 sides which the bag body 3 adjoins.

  The attachment of the fraction film 4 is not limited to the present invention, but can be performed as follows, for example.

  The fraction film 4 is placed on one thermoplastic resin film 2a in accordance with a predetermined position and direction, and the other thermoplastic resin film 2b is placed thereon, and the side edges of the thermoplastic resin films 2a and 2b are covered. Heat sealing is performed to form the fused portions 6a and 6b. The end of the fraction film 4 is embedded in the fusion part 6. Next, the side edge of the heat seal layer 15 is formed on the free end side of the fraction film 4, that is, the side edge opposite to the side where the heat seal between the low heat seal layers of the ribbon-like body 17 is formed. Heat seal the inner surface of the film 2.

  The heat sealing can be performed by pressing with a hot plate, and can be performed using ultrasonic waves, high frequencies, or the like. In order to prevent thermal adhesion between the weak heat seal layers 16 during the thermal bonding of the fraction film 4 and the thermoplastic resin film 2, it is desirable to interpose a metal plate or the like therebetween.

  The thus obtained fraction packaging bag 1 is filled with a material from the opening, and the opening is heat sealed to obtain a package. Since the fraction film 4 has a distance between both heat seals with the thermoplastic resin film 2, even when the fraction packaging bag 1 is filled with the material, the outer wall does not wave, and the packaging is easy. Further, the fractionation film 4 has a function to swell to the other chamber side and equalize the pressure when a load is applied to one chamber and the pressure in one chamber increases.

  When using the contents stored in the fraction packaging bag 1, the fraction film 4 is pressed in the direction of the other chamber if one chamber is clamped without opening the fraction packaging bag 1. At the same time, since the bag 3 opens in the thickness direction, the heat seal portion P between the weak heat seal layers 12 is peeled off, the two chambers communicate with each other, and the divided materials are mixed.

  The present invention can be widely used as a two-pack adhesive, caulking agent, and other chemical packaging, retort food, and pickles.

The perspective view which shows the example of this invention fraction packaging bag The perspective view which shows the example of the thermoplastic resin film used for this invention The perspective view which shows the example of this invention fraction film Cross-sectional view showing the fraction film part of the bag The perspective view which shows the other example of this invention fraction packaging bag The perspective view which shows the further another example of this invention fraction packaging bag

Explanation of symbols

1: Fraction packaging bag 2: Thermoplastic resin film 3: Bag body 4: Fractionation film 6: Fusing part 15: Heat seal layer 16: Weak heat seal layer 17: Ribbon-like body 20: Opening

Claims (8)

  A thermoplastic resin film constituting the bag body and a fraction film for fractionating the bag body. The fraction film is a ribbon-like body in which a heat seal layer and a weak heat seal layer are laminated. The sealing layer is overlapped and one side edge is heat-sealed, and the fractional film is disposed across the two sides of the bag, and the free side edge of the heat sealing layer is on the side. A fraction wrapping bag, characterized in that a bag body is obtained by thermally fusing each of the inner surfaces of the thermoplastic resin film constituting the bag body along the edge.   The fraction packaging bag according to claim 1, wherein the heat-sealing strength between the weak heat-sealing layers is 100 to 600 g / 15 mm.   The fraction packaging bag according to claim 1 or 2, wherein the film constituting the bag and the fraction film are made of a thermoplastic resin mainly composed of an olefin polymer.   The fraction packaging bag according to any one of claims 1 to 3, wherein the weak heat seal layer of the fraction film is formed by blending an olefin polymer with an inorganic filler or a different resin.   The fraction packaging bag according to any one of claims 1 to 4, wherein a gas barrier layer is interposed between the heat seal layer and the weak heat seal layer of the fraction film.   The fraction packaging bag according to any one of claims 1 to 5, wherein the fraction film is disposed across opposing sides of the bag body.   The fraction packaging bag according to any one of claims 1 to 6, wherein the opening of the bag is formed on each side facing each other across the fraction film.   The fraction packaging bag according to any one of claims 1 to 6, wherein an opening of the bag is formed on one side in a direction intersecting with the fraction film.

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