JP2017206265A - Package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package which can be easily opened and is excellent in convenience while suppressing degradation in impact resistance.SOLUTION: A package 1 includes: a tetrahedron shaped storage part 9 where a content is stored; a first seal part 6 and a second seal part 5 inner layers 23 of which are heat-bonded along two sides of the storage part 9 while the two sides are twisted at 90° and face each other; and a third seal part 7 one end part of which extends in a direction orthogonal to the first seal part 6 from above the first seal part 6, another end part of which extends in a direction orthogonal to the second seal part 5 from above the second seal part 5 and the inner layers 23 of which are heat-bonded on each other. A laminate film 12 has easy-tearing properties in a direction parallel to the extending direction of the third seal part 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tetrahedral package for packaging foods and the like.

  Conventional packages are disclosed in Patent Documents 1 and 2. The package of Patent Document 1 is a tetrahedral package formed of a laminated film, and is sealed with first to fourth sealing portions. The third sealing portion and the fourth sealing portion are formed along two sides of the tetrahedron, and both sides extend in a direction orthogonal to each other. The first sealing portion and the second sealing portion extend linearly from the central portion of the fourth sealing portion to both ends of the third sealing portion, respectively.

  The third sealing portion and the fourth sealing portion are formed by thermally bonding the inner layers of the laminated film. A 1st sealing part and a 2nd sealing part consist of heat-sealing wires (melting | fusion cutting), and are formed by welding the end surfaces of the laminated body which comprises a package. Since the first sealing portion and the second sealing portion can be easily torn, the package is opened using the first sealing portion and the second sealing portion as an opening guide.

Japanese Patent No. 4388952 JP 2008-254800 JP

  However, according to the conventional packaging body, the heat sealing wires (melting seals) of the first and second sealing portions have a problem that the packaging body is easily broken by impact and the impact resistance of the packaging body is lowered. . Further, since the cutting position for opening is determined in advance, the size of the opening cannot be freely changed, and there is a problem that the convenience is low when the user takes out the contents.

  An object of this invention is to provide the package body which can be opened easily and is excellent in convenience, suppressing the fall of impact resistance in view of the said problem.

  In order to achieve the above object, the present invention provides a package formed of a laminated film having at least an outer layer and an inner layer made of a heat-adhesive resin, and is a tetrahedron-shaped storage unit in which contents are stored. A first seal portion and a second seal portion in which the inner layers are thermally bonded along two opposing sides twisted by 90 ° of the storage portion, and one end portion of the first seal from above the first seal portion. A third seal portion extending in a direction orthogonal to the portion and having the other end portion extending in a direction orthogonal to the second seal portion from the second seal portion and thermally bonding the inner layers to each other. The laminated film has an easy tear property in a direction parallel to the extending direction of the third seal portion.

  Further, the present invention provides the package having the above-described structure, wherein an opening schedule line orthogonal to the third seal portion is formed on a non-forming surface of the third seal portion of the storage portion, and the opening schedule line is the laminated film It is characterized by comprising a non-penetrating incision formed in.

  Moreover, this invention is characterized by the linear mark arrange | positioned along the said opening expected line being drawn on the said laminated | multilayer film in the package of the said structure.

  Moreover, the present invention is characterized in that, in the package having the above-described configuration, an opening start means is provided in the first seal portion.

  Further, the present invention is characterized in that, in the package having the above-described configuration, a plurality of the opening start means are arranged in parallel in the extending direction of the first seal portion.

  Moreover, the present invention is characterized in that in the package having the above-described structure, a barrier layer having gas barrier properties is provided between the outer layer and the inner layer.

  Further, the present invention is characterized in that, in the package having the above-described configuration, at least one layer constituting the laminated film is a uniaxially stretched film stretched in the extending direction of the third seal portion.

  Moreover, the present invention is characterized in that, in the package having the above structure, the inner layer is a uniaxially stretched film stretched in the extending direction of the third seal portion.

  According to the present invention, by arranging the easy tear direction of the laminated film in a direction parallel to the extending direction of the third seal portion, the easy tear direction of the laminated film with the first seal portion or the second seal portion as the opening start point. The accommodating portion can be smoothly torn along the. Moreover, the magnitude | size of the opening opening formed in an accommodating part can be freely changed by changing the position of an opening start point. Therefore, it is possible to provide a package that can be easily opened and is excellent in convenience while suppressing a decrease in impact resistance.

The perspective view of the package which concerns on 1st Embodiment of this invention. The expanded view of the package which concerns on 1st Embodiment of this invention. Sectional drawing which shows the laminated constitution of the laminated | multilayer film which comprises the package which concerns on 1st Embodiment of this invention. The top view of the elongate laminated film with which the blank sheet of the package which concerns on 1st Embodiment of this invention continued. The perspective view which shows the state after opening the package which concerns on 1st Embodiment of this invention. The perspective view which shows the state after opening of the package which concerns on 1st Embodiment of this invention. The perspective view which shows the state after opening of the package which concerns on 1st Embodiment of this invention. The perspective view of the package which concerns on 2nd Embodiment of this invention. Sectional drawing which shows the laminated constitution of the laminated | multilayer film which comprises the package which concerns on 2nd Embodiment of this invention. The perspective view which shows the state after opening of the package which concerns on 2nd Embodiment of this invention. Sectional drawing which shows the laminated constitution of the laminated | multilayer film which comprises the package which concerns on 3rd Embodiment of this invention.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a packaging body 1, and the packaging body 1 is formed by heat-sealing a blank sheet 102 (see FIG. 2), and is formed by a triangular bottom surface 3 and side surfaces 4 a to 4 c. Storage section 9. A content 10 is hermetically stored in the storage portion 9. A bottom seal portion (first seal portion) 5 is formed along one side 13 connecting the bottom surface 3 and the side surface 4c. A top seal portion (second seal portion) 6 is formed along one side 14 connecting the side surfaces 4a and 4b. The bottom seal portion 5 and the top seal portion 6 are twisted by 90 ° and face each other.

  A back seal portion (third seal portion) 7 is formed continuously from the top seal portion 6 to the bottom seal portion 5. One end of the back seal portion 7 extends from above the top seal portion 6 in a direction orthogonal to the top seal portion 6. The other end of the back seal portion 7 extends from above the bottom seal portion 5 in a direction perpendicular to the bottom seal portion 5. Further, the back seal portion 7 extends so as to straddle one side 11 connecting the bottom surface 3 and the side surface 4a. In addition, the front surface of the package 1 becomes side surfaces 4b and 4c which are non-forming surfaces of the back seal portion 7. The bottom seal portion 5, the top seal portion 6 and the back seal portion 7 are formed by causing inner layers 23 of a laminated film 2 described later to face each other and thermally bonding with a predetermined width.

  The end surfaces of the bottom seal portion 5 and the top seal portion 6 are formed in a saw shape, and a plurality of opening notches (V notches) 5a, 6a are arranged in parallel in the extending directions.

  FIG. 2 is a development view of the package 1, and the package 1 is formed from one rectangular blank sheet 102. The bottom surface 3 and the side surfaces 4a to 4c all have the same triangular shape, and a bottom seal portion 5, a top seal portion 6 and a back seal portion 7 are arranged so as to surround the bottom surface 3 and the side surfaces 4a to 4c. A part of the side surface 4a and the bottom surface 3 is divided and arranged. In addition, the side 11 connecting the bottom surface 3 and the side surface 4a, the side 12 connecting the bottom surface 3 and the side surface 4b, the side 15 connecting the side surfaces 4a and 4c, and the side 16 connecting the side surfaces 4b and 4c are formed into a tetrahedron shape. It is a ridgeline when forming.

  Moreover, the blank sheet 102 has linear easy tearability (linear tearability) in the extending direction of the back seal portion 7. This easy tear direction coincides with the MD direction (longitudinal direction: Machine Direction = flow direction of the film), and the tear propagation resistance value in the MD direction is larger than that in the TD direction (transverse direction: Transverse Direction = the width direction of the film). small.

  In addition, the easy tear direction (MD direction) extends in a direction orthogonal to the extending direction of the top seal portion 6 on the side surfaces 4a and 4b where the top seal portion 6 is one side in the package 1 of FIG. The bottom seal portion 5 extends in a direction orthogonal to the extending direction of the bottom seal portion 5 on the side surface 4c and the bottom surface 3 forming one side.

  FIG. 3 is a cross-sectional view showing a laminated structure of the laminated film 2 constituting the package 1, and the laminated film 2 constituting the blank sheet 102 includes an outer layer 22 and an inner layer 23 composed of a heat-adhesive (thermoplastic) resin layer. Is a laminated body.

  Since the outer layer 22 is a basic material constituting the package 1, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like can be used. For example, polyester, polyamide, A polypropylene resin or the like can be used. The thickness of the film constituting the outer layer 22 may be determined in consideration of cost and the like, but about 12 to 25 μm is appropriate.

  As a specific example of the outer layer 22, a single body such as a uniaxially stretched and biaxially stretched nylon film, a polypropylene film (OPP), a polyester resin film, or a laminate thereof is used. Specific examples of the polyester resin film include polyethylene terephthalate resin (PET), polybutylene terephthalate resin, polyethylene-2, 6-naphthalate resin, polybutylene-2, 6-naphthalate, and polycyclohexanedimethylene terephthalate resin. Various polyester resins can be used.

  The outer layer 22 may be formed with a print layer to which a desired print pattern such as a character, graphic, symbol, or pattern is added. The printing layer is formed by printing a desired printed pattern on the back surface of the outer layer 22 by a printing method such as gravure printing, offset printing, letterpress printing, screen printing, transfer printing, flexographic printing or the like using the ink composition.

  The ink composition contains one or more ordinary ink vehicles as a main component, and if necessary, a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a curing agent, a crosslinking agent, and a lubricant. In addition, one or more additives such as antistatic agents and fillers are optionally added, and further colorants such as dyes and pigments are added, and the mixture is sufficiently kneaded with a solvent, a diluent, and the like. .

  The inner layer 23 is a layer made of a heat-adhesive (thermoplastic) resin, and is melted by heat to fuse the laminated film 2. Examples of the heat-adhesive resin used for the inner layer 23 include low density polyethylene (LDPE), medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene (LLDPE), polypropylene (CPP), silica, Polypropylene (VMPP) provided with a vapor deposition layer such as alumina and aluminum, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene Acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, etc. for polyolefin resins such as ester copolymers of ethylene and acrylic acid esters, ethylene-methacrylic acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyethylene or polypropylene of It one not selected from acid-modified polyolefin resin modified with unsaturated carboxylic acid may be used or two or more kinds.

  The thickness of the inner layer 23 may be appropriately determined in consideration of required physical properties (heat sealability), cost, and the like, and is preferably about 10 μm to 100 μm, particularly preferably about 15 μm to 50 μm. As a method for forming the inner layer 23, a method of laminating a single layer or a multilayer film of the above-mentioned thermoadhesive resin, or a method of laminating the thermoadhesive resin by a melt extrusion method is used.

  Furthermore, by using a stretched uniaxially stretched film for at least one of the outer layer 22 and the inner layer 23, the tear propagation resistance value in the tear direction of the laminated film 2 can be reduced and the tearability of the laminated film 2 can be improved. it can. In particular, the heat-adhesive resin constituting the inner layer 23 tends to be sticky by heating, and the tearability tends to be lowered. For this reason, in particular, in the case where the package 1 is used for cooking while the contents 10 are filled, it is preferable to improve the tearability by using a uniaxially stretched film for the inner layer 23.

  As a production method of the laminated film 2, a lamination method used when producing a normal packaging material, for example, a dry lamination method, a wet lamination method, a solventless lamination method, a coextrusion lamination method, an inflation method, or the like is used. it can.

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

  FIG. 4 is a plan view of the long laminated film 2 in which the blank sheets 102 are continuous. The manufacturing method of the package 1 first manufactures a long laminated film 2 in which a plurality of blank sheets 102 are continuous at the bottom seal portion 5 and the top seal portion 6.

  At this time, the easy tear direction (MD direction) of the laminated film 2 is arranged in a direction parallel to the back seal portion 7. Moreover, the adjacent blank sheet | seat 102 is arrange | positioned so that the bottom face 3 and the side surfaces 4a-4c may become symmetrical in MD direction on both sides of the bottom seal part 5 or the top seal part 6. FIG.

  Next, the laminated film 2 is set in a filling machine, and the back seal portions 7 are continuously heat-sealed by curving in the width direction (vertical direction in FIG. 4) so that the inner layer 23 faces while sequentially feeding from the tip. I will do it. By sealing the back seal portion 7, the divided bottom surface 3 and side surface 4a are joined to form a triangular shape.

  Next, the bottom seal portion 5 of the laminated film 2 formed into a ring shape by sealing the back seal portion 7 is bent at both end portions (positions of arrows A in FIG. 2) of the side surface 4b and overlapped so that the inner layer 23 faces each other. Heat seal together. Then, a predetermined amount of contents 10 (in this case, solid food) is filled from the remaining unsealed portion (top seal portion 6).

  Thereafter, the top seal portion 6 and the top seal portion 6 of the next package 1 are bent at both end portions (positions of arrow B in FIG. 2) of the side surface 4c, overlapped so that the inner layer 23 faces, and simultaneously heat sealed. The tetrahedral storage portion 9 is formed. At this time, the bottom seal portion 5 and the top seal portion 6 are twisted by 90 ° and face each other.

  Finally, the package 1 as shown in FIG. 1 is formed by cutting between the top seal portions 6 with a slitter whose cut surfaces are processed with a serrated blade. Therefore, in the next package 1, the contents 10 are filled from the bottom seal portion 5 which is an unsealed portion. Thereafter, the above procedure is repeated to form the package 1 continuously.

  In addition, as a method of heat sealing, it can carry out by well-known methods, such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal, for example.

  FIG. 5 is a perspective view showing a state after the package 1 is opened. When the top seal portion 6 is torn from the center of the top seal portion 6 of the package 1 shown in FIG. The side surfaces 4 a and 4 b are torn along the easy tear direction (MD direction) of the laminated film 2. When tearing until the breaking line reaches the bottom seal portion 5, a bottom-shaped container 3 having a bottom surface 3 and side surfaces 4c as bottom portions and side surfaces 4a and 4b as side walls and a large opening 9a at the top is formed. Thereby, it is not necessary to prepare the tableware which takes out the content 10 separately.

  6 and 7 are perspective views showing a state after the package 1 is opened, and the top seal portion 6 is torn starting from the center of the top seal portion 6 of the package 1 shown in FIG. Shows the state. The side surfaces 4a and 4b continuous to the top seal portion 6 are torn along the easy tear direction (MD direction) of the laminated film 2, and the breaking line reaches the sides 15 and 16 connecting the side surface 4c and the side surfaces 4a and 4b. At this time, when the top h of the package 1 is hung downward, the state where the opening 9a is opened is maintained.

  In addition, the magnitude | size of the opening 9a can be freely changed by changing the position of the starting point which opens the top seal | sticker part 6. FIG. In other words, the opening 9a is formed smaller by opening from the center of the top seal 6 starting from the top. Thereby, the user can change the magnitude | size of the opening 9a freely according to the kind, shape, etc. of the contents 10.

  Further, when the top portion h of the bag 1 is pulled from the state of FIG. 6, the side surface 4 c is torn along the MD direction, and the cutting line reaches the bottom seal portion 5. Thereby, as shown in FIG. 7, the opening 9a which continues from the upper part of the accommodating part 9 to the side surface 4c is formed. For example, when the content 10 is reduced, the opening 10a can be formed larger from the state of FIG. 6 to the state of FIG. 7, and the content 10 can be easily taken out.

  According to this embodiment, the back seal portion (third seal portion) extending in a direction orthogonal to the top seal portion (first seal portion) 6 and the bottom seal portion (second seal portion) 5 of the tetrahedral storage portion 9. By arranging the easy tearing direction (MD direction) of the laminated film 2 in a direction parallel to the extending direction of 7, the easy tearing direction (MD) of the laminated film 2 with the top seal part 6 or the bottom seal part 5 as the opening start point. The accommodating portion 9 can be smoothly torn along the direction. Moreover, the size of the opening 9a formed in the accommodating part 9 can be freely changed by changing the position of the opening start point. Moreover, it can be used as a container for the contents 10 as it is after opening. For this reason, the package 1 can be used for various purposes. Therefore, it is possible to provide a package 1 that can be easily opened and is excellent in convenience while suppressing a decrease in impact resistance.

  Further, by providing the top seal portion (first seal portion) 6 with the opening start means 6a, the user can tear the package 1 into a predetermined shape from a predetermined opening start point. Thereby, opening can be made easy and the convenience can be improved.

  Moreover, by opening a plurality of opening start means 6a in the extending direction of the top seal portion (first seal portion) 6, the position of the opening start point can be changed and the top seal portion 6 can be easily broken. Therefore, the convenience for the user is further improved.

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 8 is a perspective view of the packaging body 1 of the second embodiment, showing a state before opening. FIG. 9 is a cross-sectional view showing the layer structure of the laminated film 2 constituting the package 1 of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the present embodiment, a planned opening line L1 that crosses the side surface 4c is formed. Other parts are the same as those in the first embodiment.

  Both ends of the expected opening line L1 extend to the side surfaces 4a and 4b, and the expected opening line L1 extends in a direction orthogonal to the easy tear direction (MD direction) of the laminated film 2. Further, the planned opening line L1 includes a non-penetrating cut 22a cut at a predetermined depth in the thickness direction from the outside of the outer layer 22, and extends linearly. The cut 22a can be formed by a carbonic acid laser or the like.

  Note that the scheduled opening line L1 may be formed in a single row of perforations, or may be formed in a plurality of rows of perforations. By forming the notches 22a in a row of perforations, it is possible to reduce the occurrence of pinholes and suppress a decrease in impact resistance. Moreover, it becomes easy to tear the package 1 by forming the notches 22a in a plurality of rows of perforations.

  Further, a linear mark (not shown) arranged along the planned opening line L1 is drawn on the laminated film 2 by printing. The user can recognize that the opening direction of the package 1 is changed from the easy tear direction (MD direction) using this mark as a mark.

  Note that the alternate long and short dash line extending in the easy tear direction (MD direction) of the laminated film 2 from the intersection of the planned opening line L1 and the sides 15 and 16 toward the top seal portion 6 is the planned fracture line L2, along the planned fracture line L2. A linear mark (not shown) is drawn on the laminated film 2 by printing. Thereby, the user can recognize the starting point of opening of the package 1 using the linear mark as a mark.

  The alternate long and short dash line extending in the easy tear direction (MD direction) of the laminated film 2 from both ends of the planned opening line L1 toward the top seal portion 6 is the planned fracture line L3, and the side surfaces 4a and 4b below the planned fracture line L3. Is broken in the easy tear direction (MD direction), the break line does not reach the expected opening line L1.

  FIG. 10 is a perspective view showing a state after the package 1 is opened. When the top seal portion 6 and the side surfaces 4a and 4b of the package 1 are torn along the planned fracture line L2, the fracture line becomes the planned opening line L1. To reach. Note that the planned fracture line L2 extends in the easy tear direction (MD) and can smoothly tear the side surfaces 4a and 4b. Next, the breaking direction is changed in the extending direction of the planned opening line L1, and the side surface 4c is torn along the planned opening line L1. Thereby, the top part h of the package 1 is pulled apart, and an opening 9 a is formed in the upper part of the storage part 9.

  According to the present embodiment, for example, in the case where chocolate or the like melted is stored in the storage unit 9 and the stick-shaped confectionery S is inserted into the opening 9a from the opening 9a and the chocolate 10 is attached to eat the confectionery, the package The top h of 1 (see FIG. 7) does not become an obstacle, and convenience can be improved.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 11 is a cross-sectional view showing the layer structure of the laminated film 2 constituting the package 1 of the third embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the present embodiment, a barrier layer 24 is provided between the outer layer 22 and the inner layer 23. Other parts are the same as those in the first embodiment.

  For the barrier layer 24, it is preferable to use a material having excellent water vapor barrier properties and gas barrier properties when the content 10 to be sealed is easily altered by moisture or oxygen. Specifically, films such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), etc., aluminum foil (AL), or vapor deposition of silica, alumina, aluminum, etc. Biaxially stretched nylon film (ONY) provided with a coating layer of PDC or PVDC, polyethylene terephthalate (VMPET) provided with a vapor deposition layer such as silica, alumina, aluminum, biaxially stretched polyethylene terephthalate film (PET film), biaxial A stretched polypropylene film (OPP film) etc. can be used.

  Since the film provided with the aluminum foil or the aluminum vapor deposition layer is opaque, it can also serve as a light shielding layer. As the aluminum foil used for the barrier layer 24, an annealed aluminum foil is appropriate, and a thickness of about 6 to 15 μm is appropriate.

  Also, a biaxially stretched nylon film used as the outer layer 22, a vapor-deposited layer of silica, alumina, aluminum, or a coating layer of polyvinylidene chloride, ethylene / vinyl alcohol copolymer (EVOH), etc. It may be provided as the barrier layer 24.

Further, as the outer layer 22, nylon having a multilayer structure such as nylon / EVOH / nylon or nylon / metaxylylenediamine / adipic acid copolymer (MXD) / nylon may be used.

  The physical properties required for the package 1, such as mechanical toughness, flex resistance, puncture resistance (pinhole resistance), impact resistance, cold resistance, heat resistance, chemical resistance, etc. Therefore, a material having excellent physical properties may be used for the barrier layer 24.

  Specifically, stretched films of polyolefin such as polyester, polyamide, polyethylene, polypropylene, and ethylene-propylene copolymer can be used.

  Furthermore, by using a film having high heat resistance as the laminated film 2, the contents 10 can be cooked by heating in a state where the package 1 is filled. For example, the contents 10 can be boiled by putting the unopened package 1 in hot water.

  In addition, by using the laminated film 2 that does not include a metal layer as the barrier layer 24 and has a melting point of 100 ° C. or higher, cooking by a microwave oven is also possible. In this case, in order to prevent the package 1 from being ruptured due to an increase in internal pressure during heating, a small hole may be formed in the storage portion 9 by slightly breaking the side surfaces 4a and 4b from the top seal portion 6.

  Alternatively, the barrier layer 24 may be configured by laminating a plurality of the above-mentioned base materials listed as the barrier layer 24. Further, by using a stretched uniaxially stretched film for at least one of the outer layer 22, the inner layer 23, and the barrier layer 24, the tear propagation resistance value in the tear direction of the laminated film 2 is reduced, and the tearability of the laminated film 2 is increased. Can be improved.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the opening notches 5a and 6a are formed as V-notches as the opening start means, but may be replaced with I-notches or U-notches instead of the V-notches. Further, instead of the opening notches 5a and 6a, the bottom seal portion 5 and the top seal portion 6 can be provided with a scar group region composed of a plurality of fine piercing holes.

  In addition, although the bottom seal portion 5 and the top seal portion 6 are formed in a saw shape, the bottom seal portion 5 and the top seal portion 6 may be provided with opening notches (V notches) 5a and 6a only at one location. Moreover, you may provide the notch for an opening only in one of the bottom seal part 5 or the top seal part 6. FIG. Further, even if the opening start means is not provided on the bottom seal portion 5 or the top seal portion 6, the user can select the opening start position, provide a notch with scissors or the like, and provide a starting point for opening, thereby increasing the size of the opening 9a. The container can be used as a container for the contents 10 as it is after opening.

  Moreover, in the said embodiment, although the side surface 4a, 4b was fractured | ruptured from the notch 6a for opening formed in the top seal | sticker part 6, and the package body 1 was opened, the package body 1 is made so that the side surface 4a may face downward. When reversed, the bottom seal portion 5 and the top seal portion 6 are interchanged. Therefore, the package 1 may be opened by breaking the bottom surface 3 and the side surface 4c from the opening notch 5a formed in the bottom seal portion 5 instead of the top seal portion 6.

  Hereinafter, the effects of the present invention will be described in more detail using examples.

  A 12 μm thick silica-deposited polyethylene terephthalate film (IBPET-RB, manufactured by Dai Nippon Printing Co., Ltd.) is used as the outer layer 22 on which the barrier layer 24 is laminated, and a dry laminate layer is laminated on the barrier layer 24 (silica deposition layer). After that, a uniaxially stretched nylon film (emblem NCBC, manufactured by Unitika Co., Ltd.) having a thickness of 15 μm and having an easy tear property was laminated as the barrier layer 24. Next, after laminating a dry laminate layer on the surface of the barrier layer 24, a 40 μm thick polypropylene film (ZK99S, manufactured by Toray Film Processing Co., Ltd.) is laminated as the inner layer 23, and a laminate film having easy tearability in the MD direction. 2 was produced. Using this laminated film 2, a regular tetrahedral package 1 having a side of 100 mm as shown in FIG. 1 was produced. In addition, the easy tear direction of the laminated film 2 was arranged in parallel with the extending direction of the back seal portion 7.

  As the outer layer 22, a 15 μm thick composite nylon stretched film (BWC15, manufactured by Gunze Co., Ltd.) was used. A laminated film 2 having easy tearability in the MD direction was produced by laminating a polypropylene film. The laminated film 2 had a melting point of 130 ° C. or higher. Using this laminated film 2, a package 1 having the same shape as in Example 1 was produced.

  A 12 μm thick polyethylene terephthalate film (CB-931, manufactured by Kolon Co., Ltd.) is used as the outer layer 22, and a 12 μm thick silica-deposited polyethylene terephthalate film (Part No. 1312, manufactured by Toray Film Processing Co., Ltd.) is used as the barrier layer 24. Then, the outer layer 22 and the barrier layer 24 were bonded via a dry laminate layer. At this time, the deposited silica layer of the barrier layer 24 was disposed on the surface opposite to the outer layer 22. Moreover, after laminating a dry laminate layer on the silica vapor deposition layer side of the barrier layer 24, a laminated film having easy tearability in the MD direction is laminated by laminating a uniaxially stretched polypropylene film having a thickness of 50 μm as the inner layer 23. 2 was produced. Using this laminated film 2, a regular tetrahedral package 1 having a side of 100 mm as shown in FIG. 1 was produced. In addition, the easy tear direction of the laminated film 2 was arranged in parallel with the extending direction of the back seal portion 7.

[Comparative Example 1]
The laminated film according to Comparative Example 1 has the same layer configuration except for the laminated film 2 according to Example 1 and the barrier layer 15. The laminated film according to Comparative Example 1 was obtained by laminating a 15 μm-thick nylon film (Emblem ONBCRT, manufactured by Unitika Co., Ltd.) as the barrier layer 15. A package having the same shape as in Example 1 was produced using this laminated film. In addition, the laminated film which concerns on the comparative example 1 does not have easy tearability in a predetermined direction.

[Comparative Example 2]
The laminated film according to Comparative Example 2 has the same layer configuration except for the laminated film 2 according to Example 3 and the inner layer 23. The laminated film according to Comparative Example 3 was produced by laminating a 40 μm thick polypropylene film (ZK99S, manufactured by Toray Film Processing Co., Ltd.) as the inner layer 23. A package having the same shape as in Example 1 was produced using this laminated film. In addition, the laminated film which concerns on the comparative example 3 does not have easy tearability in a predetermined direction.

[Test example]
The packaging body 1 of the present invention produced in Examples 1 to 3 and the conventional packaging bodies produced in Comparative Examples 1 and 2 were evaluated for unsealing properties and opening degrees of freedom. Moreover, the packaging body manufactured in Examples 1 and 2 and Comparative Example 2 was evaluated also about the openability after a heating.

  For the evaluation of the unsealing property, the unsealing property when the package was torn from the top seal portion 6 was evaluated by the feeling at the time of unsealing and visual observation of the unsealing portion. The evaluation criteria are ◎ when the side surfaces 4a and 4b are broken almost straight from the center part of the top seal part 6 to both ends of the bottom seal part 5, and when the break line is slightly curved but is broken smoothly. ○, the case where the fracture line was greatly curved or the case where the fracture stopped due to the stickiness of the inner layer 23 was marked as x.

  Moreover, the above-mentioned opening property evaluation was performed after heating for 20 seconds at 600 w with a microwave oven.

  The opening degree of freedom is evaluated by changing the starting point of the top seal portion 6 of the package and tearing it to form a boat-shaped container as shown in FIG. 5 and a container having a tetrahedron-shaped upper opening 9a as shown in FIG. Whether or not it could be formed was evaluated by touch at opening and visual observation of the opening. The evaluation criteria were based on the same criteria as the evaluation of openability. Table 1 shows the evaluation results of the unsealing property, the unsealing property after heating, and the unsealing degree of freedom.

  As is clear from Table 1, the laminated film 2 having easy tearability was used, and the easy tear direction (MD direction) of the laminated film 2 was arranged parallel to the extending direction of the back seal portion 7. In the package 1, all were smoothly broken from the top seal portion 6. In particular, in Example 2 in which a uniaxially stretched polypropylene film was used for the inner layer 23, the unsealing property was even better. Moreover, the packaging body 1 was smoothly torn by changing the starting point of the top seal portion 6, and a container having a plurality of shapes could be created.

  On the other hand, in the packaging bodies of Comparative Examples 1 and 2 using the laminated film 2 that does not have easy tearability in the MD direction, the curve of the break line and the stop of the break occurred.

  In addition, the packaging bodies 1 of Examples 1 and 2 using the laminated film 2 having a high heat resistance and a melting point of 130 ° C. or higher did not show a decrease in the openability even after heating with a microwave oven.

  The present invention can be used for a package for packaging foods and the like. By utilizing the present invention, it is possible to provide a package with a simple structure that can be used as a container for contents after opening and can secure stability when used as a container.

DESCRIPTION OF SYMBOLS 1 Package 2 Laminated film 3 Bottom surface 4a-4c Side surface 5 Bottom seal part (1st seal part)
6 Top seal part (second seal part)
7 Back seal (third seal)
9 Storage portion 10 Contents 22 Outer layer 23 Inner layer 24 Barrier layer

Claims (8)

A package formed by a laminated film having at least an outer layer and an inner layer made of a heat-adhesive resin,
A tetrahedron-shaped storage section for storing contents;
A first seal part and a second seal part, wherein the inner layers are thermally bonded to each other along two opposing sides twisted by 90 ° of the storage part;
One end portion extends from above the first seal portion in a direction orthogonal to the first seal portion, and the other end portion extends from above the second seal portion in a direction orthogonal to the second seal portion. A third seal part that thermally bonds the inner layers together,
The said laminated film has easy tearability in the direction parallel to the extension direction of a said 3rd seal part, The package characterized by the above-mentioned.   A planned opening line perpendicular to the third seal part is formed on a non-formation surface of the third seal part of the storage part, and the planned opening line is formed by a non-penetrating cut formed in the laminated film. The package according to claim 1, wherein   The package according to claim 2, wherein a linear mark arranged along the planned opening line is drawn on the laminated film.   The package according to any one of claims 1 to 3, wherein an opening start means is provided in the first seal portion.   The package according to claim 4, wherein a plurality of the opening start means are arranged in parallel in the extending direction of the first seal portion.   The package according to any one of claims 1 to 5, wherein a barrier layer having gas barrier properties is provided between the outer layer and the inner layer.   The package according to any one of claims 1 to 6, wherein at least one layer constituting the laminated film is a uniaxially stretched film stretched in the extending direction of the third seal portion.   The package according to claim 7, wherein the inner layer is a uniaxially stretched film stretched in the extending direction of the third seal portion.

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