JP4961690B2 - Packaging bag - Google Patents

Description

  The present invention relates to packaging bags for storing viscous liquid seasonings, fruit jams, butter creams, retort foods, and the like, and more specifically, two contents capable of storing the same or different contents. The present invention relates to a packaging bag that has a storage part and can be easily opened at the time of use, and the contents can be taken out simultaneously and easily.

Conventionally, for packaging forms that contain viscous liquid seasonings, fruit jams, butter creams, retort foods, etc., a film having a linear tearing property in the lateral direction or a laminate of the films is made into a bag. In general, an opening notch or the like formed near the upper end of the side seal portion is used. In such a packaging bag, the upper end of the packaging bag is laterally extended from the opening notch or the like. The opening is enlarged because it tears in the direction and opens. Therefore, for the purpose of reducing the opening width at the time of opening, there is a packaging bag in which a seal part on one side or both sides is projected inward and a notch for opening is provided in the projecting seal part. Are known. (For example, refer to Patent Document 1 and Patent Document 2).

In addition, packaging forms that contain liquid seasonings of the same or different viscosity (for example, mayonnaise and mustard), fruit jams and butter cream, and retort foods (for example, curry and stew) As shown in FIG. 1 , generally, a packaging bag (A) having two content storage portions (b, b) is used. For such a packaging bag (A), a laminated film obtained by laminating at least a base film (outer surface) and a sealant film (inner surface) is usually used. As the base film, a film having a linear tearing property in the transverse direction is used in order to obtain easy opening, and a thermoplastic resin film is used as the sealant film. Two such laminated films are stacked to seal the upper seal portion (1), the left and right seal portions (7, 8) and the central seal portion (6), and at the same time the left and right seal portions (7, 8). ) Is formed to form a notch (14) for opening. Using such a bag-made product, the same kind or different kinds of contents are filled into the respective contents storage parts (b, b) from the unsealed part (10) on the lower side, and then the unsealed part (10 ) To produce a product. Moreover, the roll-shaped laminated film may be supplied to an automatic filling and packaging machine as it is to produce a product.

Prior art documents are shown below.
Japanese Utility Model Publication No. 59-57378 Japanese Utility Model Publication No. 60-175073

  However, when opening the packaging bag mentioned in the prior art, it is necessary to tear the bag from end to end, and there is a problem that the opening operation is troublesome because the place to be grasped by hand is small. In particular, in the case of packaging forms that contain liquid seasonings of the same or different viscosity (for example, mayonnaise and mustard), fruit jams and butter cream, and retort foods (for example, curry and stew) As shown in FIG. 11, since a packaging bag having two contents storage portions is used, in order to take out each content, the two chambers must naturally be opened. Have.

  The present invention is intended to solve such problems of the prior art, and has two content storage units that can store the same type or different types of content, and when used, the packaging bag can be easily opened. An object of the present invention is to provide a packaging bag in which the contents can be taken out simultaneously and easily.

The present invention has been made to solve the above-described problems, and the invention according to claim 1 of the present invention is the packaging bag (A) having at least a seal portion on one side of the packaging bag (A). An upper seal portion (1) is provided on the upper portion of (A), and a center for forming two content storage portions (b, b) on substantially the same line that hangs down the central portion of the upper seal portion (1). A seal portion (6) is provided, and above the substantially central portion of the upper seal portion (1) for tearing and opening the packaging bag (A) at a substantially central portion below the upper seal portion (1). Opening start (11) with a sharp opening facing upwards (11) and left and right opening protrusions (12, 12) with sharp pointing in the left and right directions, and the user can insert a finger when opening Direction for extending the left and right opening projections (12, 12). Is a packaging bag, wherein a opening means for unsealed portion as a content outlet (9) is located provided.

  According to a second aspect of the present invention, in the packaging bag according to the first aspect, a cut line (15) is provided along a substantially center line from the upper end to the lower end of the central seal portion (6). A characteristic packaging bag.

  The invention according to claim 3 of the present invention is the packaging bag according to claim 1 or 2, wherein the opening means is a tear start portion (3) at the center of the upper edge (2) of the upper seal portion (1). It is a packaging bag characterized by being provided.

  The packaging bag according to the present invention is a packaging bag having a seal part at least on one side of the periphery, and an upper seal part is provided on the upper part of the packaging bag, and two substantially on the same line that hangs down the center part of the upper seal part. A central seal portion for forming one content storage portion is provided, and an opening means for tearing and opening the packaging bag is provided at a substantially central portion of the upper seal portion.

  In addition, the opening means includes an upward opening convex portion that is pointed upward substantially at the center of the upper seal portion, and left and right opening convex portions that are pointed in the left and right directions, and the user can point at the time of opening. An opening opening hole is provided, and an unsealed portion serving as a content outlet is located in the extending direction of the left and right opening convex portions. It can be opened by putting a finger in the hole, cutting the upper seal portion upward, and then tearing it left and right. Moreover, it can be simply folded into two via the central seal part, and the bag can be opened simultaneously on the left and right sides, and the respective contents can be taken out from the two contents storage parts simultaneously.

  Moreover, it can be simply folded into two via the central seal part, and the bag can be opened simultaneously on the left and right sides, and the respective contents can be taken out from the two contents storage parts simultaneously.

  Furthermore, by providing a cut line along the substantially center line from the upper end to the lower end of the central seal portion, it is possible to separate the two content storage portions, in particular, the same kind of content two When placed in the contents storage section, only one can be used first, and the rest can be used separately.

  When the opening means is provided with a tear start portion at the central portion of the upper edge of the upper seal portion, the upper seal portion can be gripped by a hand due to an inverted triangle or the like, and the opening can be made small. Therefore, it is easy to adjust the strength of the finger, the bag can be opened without the contents being scattered, and the contents can be completely squeezed out.

  Further, the bag can be folded in two through the central seal portion, and the bag can be opened at the same time on the left and right sides, and the respective contents can be taken out simultaneously from the two content storage sections.

  Embodiments of the present invention will be described in detail with reference to FIGS.

  FIG. 5 is a plan view showing a first embodiment of a packaging bag (A) according to the present invention.

  FIG. 6 is a plan view showing a second embodiment of the packaging bag (A) according to the present invention.

  FIG. 7 is a perspective view showing a state where the packaging bag (A) is filled and sealed with contents and folded into two.

  FIG. 2 is a perspective view showing a state where the packaging bag (A) of FIG. 7 is opened.

  FIG. 3 is a plan view showing a state before the opening means of the packaging bag (A) according to the present invention is provided.

  FIG. 4 is a plan view showing a state before the opening means of the packaging bag (A) according to the present invention is provided.

  As shown in FIG. 3, the packaging bag (A) according to the present invention has at least an upper seal portion (1) on the upper portion of the packaging bag (A) in the packaging bag (A) having a seal portion on one side of the periphery. And a central seal portion (6) for forming two content storage portions (b, b) on substantially the same line that hangs down from the central portion of the upper seal portion (1). The packaging bag (A) is characterized in that an opening means for tearing and opening the packaging bag (A) is provided at a substantially central portion of the portion (1).

  Further, as shown in FIG. 4, a cut line (15) is provided along the substantially center line from the upper end to the lower end of the central seal portion (6) so that the two content storage portions (b, b) can be separated. Can be.

  As the packaging bag (A), at least a laminated film in which a base film (outer surface) and a sealant film (inner surface) are laminated is used.

  Two of the laminated films whose inner surfaces are heat-fusible are overlapped with each other on the inner surface side, and the upper seal portion (1), the left and right seal portions (7, 8), and the central seal portion (6) are heated. A sealed bag having two contents storage parts (b, b) after sealing the unsealed part (10) after filling the contents from the unsealed part (10) on the lower side. A) is prepared.

  In addition, the form which does not provide the left and right seal portions (7, 8) using a tube manufactured by an inflation method may be used.

  Next, an embodiment relating to an opening means for tearing and opening the packaging bag (A) will be described in detail.

  The shape and formation method of the tear start portion (3) are not particularly limited as long as it has a trigger function capable of tearing.

  For example, a method of forming a V-shaped or U-shaped notch, cut line, flaw processing, etc. by incorporating a laser beam oscillation cutting device or a rotary die cutter device incorporating a cutting blade into a bag making machine or the like can be used.

  The tear line (4) is not particularly limited as long as it can be easily torn with fingers.

  For example, a perforation line by a sewing machine blade, a half cut line by laser processing, or the like may be used, but a perforation line is preferable in consideration of workability, productivity, economy, and the like.

  In addition, the left seal part (7), the right seal part (8), or the left seal part (7) and the right seal part (8) can be opened as usual by providing a notch (14) for opening. It is.

  Next, the packaging bag (A) of 1st Example which concerns on this invention is shown in FIG.

  At least a packaging bag (A) having a seal part on one side of the periphery, the packaging bag (A)
An upper seal portion (1) is provided on the upper portion of the upper seal portion (1), and a central seal portion (b, b) for forming two content storage portions (b, b) on substantially the same line hanging from the central portion of the upper seal portion (1) 6) is provided, and an opening means for tearing and opening the packaging bag (A) is provided at a substantially central portion of the upper seal portion (1). .

  As the unsealing means, an upward opening convex portion (11) which is pointed upward toward the substantially central portion of the upper seal portion (1), and a left / right opening convex portion (12, 12) which is pointed in the left and right directions. And an opening start hole (5b) through which a user can put a finger when opening.

  Furthermore, in the extending direction of the left and right opening convex portions (12, 12), there is a packaging bag (A) in which an unsealed portion serving as a content outlet (9) is located. .

  At the time of use, it can be easily opened by putting a finger into the opening start hole (5b), cutting the upper seal portion (1) upward, and then tearing it in the left-right direction.

  In use, the bag can be folded in two through the central seal portion (6), and the bag can be easily opened at the same time on the left and right, and the contents can be taken out simultaneously.

In particular, when the upper sealing section (1) form an inverted triangle is preferred because that diagonally weir seal shape, more so because it is easy to adjust the force adjustment can be squeezed out completely without contents are scatter .

  In addition, in the extending direction of the left and right opening convex portions (12), an unsealed portion serving as a content takeout port (9) is located, so that the content takeout port (9) can be made smaller and the amount of content The contents can be adjusted and taken out, and the contents can be taken out without scattering.

  Furthermore, by changing the form of the upper seal portion (1) while keeping the position of the opening start hole (5b) constant, the size of the content outlet (9) at the time of opening can be changed. It is possible to produce a packaging bag (A) having a content takeout opening (9) adapted to the type of content, the amount taken out once, and the like.

  For example, in the case of an inverted triangle, the opening width is changed by changing the distance from the base to the apex of the inverted triangle or the distance of the tear line (4) in the vertical direction, that is, the inclination angle of the two sides of the inverted triangle. Can do. In the case of an inverted chevron shape, the opening width can be changed by changing the tip width of the chevron, and in the case of an inverted convex shape, the tip width of the convex portion can be changed in the same manner.

  Next, at the outer edge of the packaging bag (A), the upper opening convex part (11) and the left and right opening convex part (12), or the upper opening convex part (11), or the left and right opening convex part (12 ) May be provided at an extended position, and an opening start portion such as a notch or scratch may be provided. In the case of such a structure, the user may start opening from this opening start portion.

  In addition, the method of performing the opening start part such as the notch, the notch, or the scratch processing is a method in which a cutting device that oscillates a laser beam or a rotary die cutter device incorporating a cutting blade is incorporated in a bag making machine or the like. it can.

Next, as shown in FIG. 6, the packaging bag (A) of 2nd Embodiment which concerns on this invention is a packaging bag (A) of 1st Embodiment, From the upper end to the lower end of the said center seal | sticker part (6). The packaging bag (A) is characterized in that a cut line (15) is provided along a substantially center line. Thus, by providing a cut line (15) such as a perforation in the central seal portion (6), the two content storage portions (b, b) can be made separable. By doing in this way, when especially the same kind of contents are put into two content storage parts (b, b), only one can be used first and the rest can be used separately.

  As described above, the packaging bag (A) is a liquid seasoning having the same or different viscosity (for example, mayonnaise and mustard), fruit jam and butter cream, and other retort food (for example, curry). , Stew, etc.) are filled from the unsealed portion (10) of the packaging bag (A), sold in a sealed state, and opened at the time of use.

In this case , an upward opening convex portion (11) that is pointed upward toward the substantially central portion of the upper seal portion (1), and left and right opening convex portions (12, 12) that are pointed in the left and right directions. The laminated film constituting the packaging bag (A) is an outermost base material because it is opened by an opening means such as an opening start hole (5b) in which the user can put a finger at the time of opening. It is preferable to use a film having tearability in both the vertical and horizontal directions. In addition, it is necessary to use a sealant film having high heat seal strength and excellent foreign matter sealability, heat resistance, and oil resistance for the innermost layer. In addition, since the contents are liquid seasonings, foods such as fruit jam and butter cream, retort foods, etc., when a normal temperature distribution and long-term storage are required, a gas barrier layer is added to the gas barrier film or base film. It is preferable to use a film provided with.

  Then, the base film which has the linear tearability of the outermost layer which comprises the said laminated | multilayer film, the sealant film of the innermost layer, the gas barrier film required in order to preserve | save the contents for a long term, etc. are demonstrated in detail.

  In order to more stably open the packaging bag (A) of the present invention in a straight line, it is preferable that the base film is made of a film having linear tearability. Examples of the film having linear tearability include a uniaxially stretched film stretched in one direction and a biaxially stretched film having different longitudinal and transverse stretch ratios. In the packaging bag of the present invention, the biaxially stretched film having linear tearability Is preferred.

  Generally, a plastic film is roughly classified into a stretched film and an unstretched film. The stretched film is oriented by stretching the plastic film in two longitudinal and / or horizontal directions while heating the plastic film to a temperature below the melting point. An unstretched film is an unstretched film that has not been stretched, and has no molecular chain orientation and free molecular motion, and can be bonded by heat melting (heat sealing). The molecular chains of the stretched film are oriented in one direction in uniaxial stretching and in the plane direction in biaxial stretching, and the physical properties of the unstretched film can be improved. In addition, stretching increases stiffness (rigidity), transparency, tensile strength, and shrinkage, and improves gloss, moisture resistance, and barrier properties, but decreases elongation and tear strength.

  As the base film having such a linear tear property, a biaxially stretched polyethylene terephthalate film (OPET), a biaxially stretched polyamide film (ON), or the like is often used. The substrate film having linear tearability is linear in at least one of the longitudinal (longitudinal) direction [MD (machine direction) direction] and the lateral (transverse direction) direction (TD (transverse direction) direction) of the film. Therefore, it has a performance (easy tearing property) that can be easily torn.

  The biaxially stretched polyethylene terephthalate film (OPET), which is a base film having linear tearability, is, for example, polybutylene terephthalate containing 5 to 20% by weight of polytetramethylene glycol (PTMG) units having a weight average molecular weight of 600 to 4000. Biaxially stretched polyethylene terephthalate film (OPET) manufactured using a raw material in which (modified PBT) and polyethylene terephthalate (PET) are mixed at a ratio of PET / modified PBT = 70/30 to 95/5 (weight ratio). ).

  Specifically, polyethylene terephthalate (PET) was obtained by a known production method, that is, an ester exchange reaction method from dimethyl terephthalate and ethylene glycol, or a direct esterification method from terephthalic acid and ethylene glycol. Thereafter, it may be obtained by melt polymerization or further solid phase polymerization, and may also be obtained by copolymerizing other components. Other copolymer components include isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid, succinic acid, adipic acid, sebacic acid, dodecanedioic acid, dimer acid, maleic anhydride, maleic acid Acids, fumaric acid, itaconic acid, citraconic acid, mesaconic acid, dicarboxylic acids such as cyclohexanedicarboxylic acid, 4-hydroxybenzoic acid, ε-caprolactone, oxycarboxylic acids such as lactic acid, 1,3-propanediol, 1,6- Examples thereof include glycols such as hexanediol and cyclohexanedimethanol, and polyfunctional compounds such as trimellitic acid, trimesic acid, pyromellitic acid, trimethylolpropane, glycerin, and pentaerythritol.

  The polybutylene terephthalate (modified PBT) may be obtained by polycondensation by adding PTMG in the PBT polymerization step, or by melting and kneading PBT and PTMG with an extruder. There may be.

  Other polymers such as polyethylene naphthalate and polycyclohexylenedimethylene terephthalate can be mixed in the raw resin of the biaxially stretched polyethylene terephthalate film (OPET).

  In order to produce the biaxially stretched polyethylene terephthalate film (OPET), first, for example, a mixture of modified PBT and PET is put into an extruder, heated and melted, and then extruded into a sheet form from a die orifice of a T die. An unstretched sheet is produced. The sheet extruded from the die orifice of the T-die is cooled by being closely attached to a cooling drum by an electrostatic application casting method or the like, and then, at a temperature of 90 to 140 ° C., 3.0 to 5. The film is stretched at a magnification of 0 and further heat treated at a temperature of 210 to 245 ° C. to obtain a modified polyethylene terephthalate film. As the biaxial stretching method, either a tenter simultaneous biaxial stretching method or a sequential biaxial stretching method using a roll and a tenter may be used. Further, a modified polyethylene terephthalate film may be produced by biaxial stretching by a tubular method.

  Next, as the biaxially stretched polyamide film (ON) which is the substrate film having linear tearability, for example, aliphatic polyamide (PA) and polymetaxylene adipamide (MXD6) are PA / MXD6 = A biaxially stretched polyamide film (ONy) produced using raw materials mixed at a ratio of 80/20 to 95/5 (weight ratio) can be mentioned.

  Specifically, PA includes aliphatic polyamides such as nylon 6 (N6), nylon 66 (N66), nylon 46 (N46), nylon 610 (N610), nylon 12 (N12). In addition to a homopolymer, it includes a copolymer containing 90 mol% or more of each unit.

  MXD6 contains 90 mol% or more of structural units produced by polycondensation reaction of metaxylylenediamine and adipic acid, and includes homopolymers or copolymers containing 10 mol% or less of other components.

The biaxially stretched polyamide film (ON) uses, for example, a mixture of PA and MXD6, and after cooling with a cooling drum, is subjected to water immersion treatment with hot water of 40 to 60 ° C., and at a stretching temperature of 150 to 220 ° C. It can manufacture by extending | stretching as a draw ratio 3-4 times in the vertical direction and a horizontal direction.

  The thickness of the substrate film having linear tearability is preferably in the range of 3 to 200 μm and more preferably in the range of 6 to 30 μm in consideration of processability.

  Next, the sealant film is a film configured as an innermost layer for sealing the laminated film by heat sealing. As such a sealant film, a conventionally known thermoplastic resin can be used. Specifically, for example, low density polyethylene resin (LDPE), medium density polyethylene resin (MDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (L-LDPE), polypropylene resin (PP), Ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methacrylic acid ester copolymer, ethylene -A film composed of an acrylic ester copolymer, an ionomer resin, an ethylene-vinyl acetate copolymer (EVA), etc. can be used. Among them, toughness, heat seal strength, contaminant sealability, hot tack property, Linear low with excellent stress crack resistance, heat resistance, oil resistance, odor resistance, etc. Degrees polyethylene resin (L-LDPE) is preferred. The thickness of the sealant film is preferably in the range of 15 to 200 μm, more preferably in the range of 30 to 60 μm, considering the strength and workability (such as lamination and bag making).

  Next, depending on the contents stored in the packaging bag (A) of the present invention, resistance to oxygen gas, water vapor, light, etc., retort suitability, long-term room temperature circulation, etc. are required. It is necessary to produce the packaging bag (A) using a gas barrier film having a characteristic and a gas barrier film in which a gas barrier layer is provided on a base film and using a gas barrier laminated film laminated with a sealant film.

  Examples of the gas barrier film in which a gas barrier layer is provided on the gas barrier resin film or the base film include an ethylene-vinyl alcohol copolymer film (EVOH), a polyvinyl alcohol film (PVA), and an ethylene-vinyl acetate copolymer (EVA). Films of saponified materials, or films such as polyethylene terephthalate (PET), polyamide (PA), polypropylene (PP), etc., coated with polyvinylidene chloride, aluminum foil, aluminum vapor deposition layer, inorganic oxide (silicon oxide, oxidation) A film provided with a vapor deposition thin film layer of aluminum, etc.) or a laminated film combining one or more of these films can be used. Among these, an aluminum foil having an easily tearable base film, Aluminum A gas barrier film provided with a vapor deposited thin film layer of an inorganic oxide (silicon oxide, aluminum oxide, etc.) that is easy to dispose of is preferable, but it is easy to dispose of after use, especially considering recent environmental problems The inorganic oxide vapor deposition film which vapor-deposited the said inorganic oxide is used more preferably.

  The support film of the inorganic oxide vapor-deposited film is not particularly limited, but a single film and various laminated films can be used in consideration of processability and the like.

  For example, polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyolefins such as polypropylene (PP) and polystyrene (PS), polyamides such as nylon-6 and nylon-66 Non-stretched or stretched films such as (PA), polycarbonate (PC), polyacrylonitrile (PAN), and polyimide (PI).

Among these, from the viewpoint of tearability, strength, cost, etc., as described above, a biaxially stretched polyethylene terephthalate film (OPET) or a biaxially stretched polyamide film (OPET) having a linear tear property arbitrarily stretched in the biaxial direction ( ON) is preferred.

  As the vapor-deposited thin film of the inorganic oxide, it is basically possible to use a metal oxide such as silicon, aluminum, magnesium, calcium, potassium, tin, sodium, boron, titanium, lead, zirconium, An oxide such as yttrium or a mixture thereof may be mentioned.

  In general, silicon oxide, aluminum oxide, and magnesium oxide are preferably used from the viewpoint of transparency, physical properties, and productivity.

  As a method of forming such an inorganic oxide vapor-deposited thin film, a vacuum vapor deposition method, a sputtering method, or the like can be used, but the vacuum vapor deposition method is preferable in view of productivity, production cost, and the like.

  The vacuum deposition method is roughly classified into three types according to the form of the body to be vapor-deposited. 1) Batch method: vapor deposition method of molded product, 2) take-up type semi-continuous method: roll film (web) After unwinding, vapor deposition, and winding in a vacuum system, return to the air system again and take out the vapor deposition product. 3) Unwinder (unwinding device) for roll film (web) ) And a rewinder (winding device) are arranged in the atmospheric system, and a vapor deposition drum and an evaporation source are arranged in a vacuum system to deposit an evaporating substance on a roll film (web). This is a completely continuous method called -air method and has a feature of high productivity.

  When evaporating a vaporized material on a roll film (web), a take-up semi-continuous method is particularly widespread. Describe the structure.

  First, the constituent elements are a roll film (web), an evaporation source, an evaporation substance, a vapor deposition drum, a vacuum system, an unwinder (unwinding device), a rewinder (winding device), a guide roll, and the like.

  Next, the outline of the work process will be described. First, as a preparatory step, the door of the vacuum vapor deposition device is opened, the roll film (web) is set in the unwinder (unwinding device), and it is arranged between the unwinder and the vapor deposition drum. The roll-shaped film (web) travels to the vapor deposition drum through the guide roll that is being wound, and is further wound around the rewinder (winding device) via the guide roll disposed between the rewinder (winding device). And the preparation for vapor deposition of the evaporating substance on the roll film (web) is completed.

  Next, the door of the vacuum vapor deposition apparatus is closed, and the vacuum vapor deposition chamber divided by the vacuum suction constant pressure chamber and the partition wall in the vacuum vapor deposition apparatus is set to a predetermined vacuum environment by a vacuum pump. The roll-like film (web) is fed out and evaporated to the roll-like film (web) traveled through a guide roll by heating and evaporating an evaporation substance from an evaporation source disposed at the lower part of the vapor deposition drum. Vapor deposition (web).

  Since the vapor deposition drum is cooled, the evaporated film is recrystallized and fixed to the roll film (web), and the roll film (web) deposited via the guide roll on the rewinder side is attached to the rewinder. It is wound up.

The internal structure of the vacuum deposition apparatus is divided into a vacuum suction constant pressure chamber and a vacuum deposition chamber by partition walls. The vacuum suction constant pressure chamber is composed of an unwinder, guide roll, tension control device, speed control device, position control device, and vapor deposition drum. Some rewinders are arranged.

  In the vacuum deposition chamber, a part of the deposition drum, an evaporation source, and a heating device thereof are arranged. The vacuum suction constant pressure chamber has a degree of vacuum of 1 by a vacuum pump arranged around the vacuum deposition apparatus main body. The vacuum vapor deposition chamber provided about × 100 MPa through the partition is set to about 1 × 10 −2 MPa (SI unit).

  Since the chamber is divided into two partitions, impurities (dust) such as gas generated from the roll-shaped film (web) in the vacuum suction constant pressure chamber have a bad influence on the deposition in the vacuum deposition chamber. Few.

  On the contrary, the radiant heat from the evaporation source arranged in the vacuum deposition chamber has little influence on the vacuum suction constant pressure chamber, so that the influence on the roll film (web) is small.

  The vacuum deposition method is also a heating method: 1) Indirect resistance method, 2) Direct resistance heating method (wire feed method), 3) High frequency induction heating method, 4) Electron beam method (Electoron Beam, EB method for short) There are two methods, but when the evaporated substance uses an insulating metal oxide such as silicon oxide or aluminum oxide, the electron beam method with high energy conversion efficiency is optimal.

  The winding type electron beam vacuum deposition method is a method in which an evaporating substance such as silicon oxide or aluminum oxide is directly irradiated with an electron beam, and the surface of the evaporating substance is scanned to heat the evaporating substance surface. In this method, energy is converted at a portion where the beam hits to evaporate the evaporated substance.

  Although the thickness of this vapor deposition thin film is suitably selected by the end use of a vapor deposition film, it is preferable to exist in the range of 5-400 nm.

  If the film thickness of the deposited thin film is less than 5 nm, a uniform film cannot be provided. Therefore, sufficient oxygen gas barrier properties and water vapor barrier properties cannot be obtained. If the film thickness exceeds 400 nm, flexibility is lost, bending, pulling, etc. Due to the external factors, cracking and peeling are likely to occur in the deposited thin film, which is not preferable.

  In addition, a thermally crosslinkable primer coat layer is provided between the base film having linear tearability such as the biaxially stretched polyethylene terephthalate film (OPET) or the biaxially stretched polyamide film (ON) and the vapor-deposited thin film layer, You may use the gas barrier film which improved the adhesiveness between a base film and a vapor deposition thin film layer.

Examples of the thermally crosslinkable primer coat layer include, for example, a general formula M (OR) n (wherein M: a metal element such as Si, Zr, Ti, and Al, and an alkyl group such as R: CH ₃ and C ₂ H _5. N: oxidation number of metal element) or a hydrolyzate of the metal alkoxide or a general formula, R′Si (OR) ₃ (R ′: alkyl group, vinyl group, epoxy group, glycid A composite of at least one of a trifunctional organosilane represented by R: an alkyl group or the like or a hydrolyzate of the organosilane with a polyol compound and an isocyanate compound can also be used. .

Alternatively, a trifunctional organosilane represented by a general formula, R′Si (OR) ₃ (wherein R ′: an amino group, an isocyanate group, a sulfoxide group, etc., R: an alkyl group, etc.), a polyol compound, and an isocyanate It may be composed of a compound with a compound.

Next, the metal alkoxide has a general formula, M (OR) n (wherein M: a metal element such as Si, Zr, Ti, Al, R: an alkyl group such as CH ₃ or C ₂ H ₅ , n: For example, an alkoxysilane compound, a zirconium alkoxide compound, a titanium alkoxide compound, or the like can be used.

Specifically, tetramethoxysilane [Si (O—CH ₃ ) ₄ ], tetraethoxysilane [Si (O—C ₂ H ₅ ) ₄ ], tetraisopropoxysilane [Si (O—iso—C ₃ H _{7). 4} ], tetrabutoxysilane [Si (O—C ₄ H ₉ ) ₄ ], dimethyldimethoxysilane [(H ₃ C) ₂ Si (O—CH ₃ ) ₂ ], trimethoxymethylsilane [H ₃ CSi (O) -CH _{3) 3],} dimethyldiethoxysilane _{[(H 3 C) 2 Si} (O-C 2 H 5) 2] alkoxysilane compounds such as tetramethoxysilane zirconium _{[Zr (O-CH 3)} 4], tetra ethoxy zirconium _{[Zr (O-C 2 H} 5) 4], tetraisopropoxy zirconium _{[Zr (O-iso-C} 3 H 7) 4], tetrabutoxy zirconium Niu _{[Zr (O-C 4 H} 9) 4] zirconium alkoxide compounds such as tetramethoxysilane titanium _{[Ti (O-CH 3)} 4], tetraethoxysilane titanium _{[Ti (O-C 2 H} 5) 4], Tetoraiso propoxytitanium _{[Ti (O-iso-C} 3 H 7) 4], tetrabutoxy titanium _{[Ti (O-C 4 H} 9) 4] and the like titanium alkoxide compounds such as.

The metal alkoxide has a general formula, M (OR) n (wherein M: a metal element such as Si, Zr, Ti, Al, R: an alkyl group such as CH ₃ or C ₂ H ₅ , n: a metal It may be a hydrolyzate of a compound represented by the oxidation number of the element.

Next, the trifunctional organosilane has a general formula, R′Si (OR) ₃ (wherein R ′: alkyl group, vinyl group, epoxy group, glycidoxypropyl group, etc., R: alkyl group, etc.) ), And examples thereof include ethyltrimethoxysilane, vinyltrimethoxysilane, glycidoxypropyltrimethoxysilane, glycidoxytrimethoxysilane, and epoxycyclohexylethyltrimethoxysilane. These compounds may be used alone or in a mixture of two or more. Further, hydrolysis of a compound represented by the above general formula, R′Si (OR) ₃ (wherein R ′: alkyl group, vinyl group, epoxy group, glycidoxypropyl group, R: alkyl group, etc.) It may be a thing.

Further, the trifunctional organosilane is a compound represented by the general formula, R′Si (OR) ₃ (wherein R ′: amino group, isocyanate group, sulfoxide group, R: alkyl group, etc.). For example, γ-amino-propyltrimethoxysilane, γ-amino-propyltriethoxysilane, γ-isocyanatopropyltrimethoxysilane, γ-isocyanatopropyltriethoxysilane, and the like can be mentioned. It may be used in a mixture of two or more. Further, it may be a hydrolyzate of a compound represented by the above general formula, R′Si (OR) ₃ (wherein R ′: amino group, isocyanate group, sulfoxide group, etc., R: alkyl group, etc.). .

  Next, a polyester polyol or an acrylic polyol can be used as the polyol compound constituting the thermally crosslinkable primer coat layer.

  The polyester polyol is terephthalic acid, isophthalic acid, phthalic acid, methylphthalic acid, trimellitic acid, pyromellitic acid, adipic acid, sebacic acid, succinic acid, maleic acid, fumaric acid, tetrahydrophthalic acid, methyltetrahydrophthalic acid, hexa Acid raw materials for hydrophthalic acid and reactive derivatives thereof, ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-hexanediol, diethylene glycol, dipropylene glycol, 1,4-cyclohexanedimethanol, neopentyl Terminals of polyester resins obtained by known production methods from alcohol raw materials such as glycol, bishydroxyethyl terephthalate, trimethylol methane, trimethylol propane, glycerin and pentaerythritol Those having 2 or more hydroxyl groups (hydroxyl groups), are those which react with the isocyanate groups of the isocyanate compound added later.

  Next, the acrylic polyol has a hydroxyl group at the terminal out of a polymer compound obtained by polymerizing an acrylic acid derivative monomer or a polymer compound obtained by copolymerization with an acrylic acid derivative monomer and other monomers. It is made to react with the isocyanate group of the isocyanate compound added later.

  Among them, an acrylic polyol obtained by polymerizing an acrylic acid derivative monomer such as ethyl methacrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, or hydroxybutyl methacrylate alone, or an acrylic polyol copolymerized by adding other monomers such as styrene is preferably used. .

  In consideration of reactivity with an isocyanate compound, the hydroxyl value is preferably between 5 and 200 (KOHmg / g).

  Next, the blending ratio of the polyol compound and the trifunctional organosilane is preferably in the range of 1/1 to 100/1 by weight ratio, more preferably in the range of 2/1 to 50/1. It is.

  The dissolving and diluting solvent is not particularly limited as long as it can be dissolved and diluted. For example, esters such as ethyl acetate and butyl acetate, alcohols such as methanol, ethanol and isopropyl alcohol, and ketones such as methyl ethyl ketone. In addition, aromatic hydrocarbons such as toluene and xylene can be used alone or arbitrarily blended.

  However, since an aqueous solution such as hydrochloric acid or acetic acid is sometimes used to hydrolyze the trifunctional organosilane, a solvent in which isopropyl alcohol or the like and a polar solvent, ethyl acetate, are arbitrarily mixed is used as a co-solvent. More preferably.

Further, a reaction catalyst may be added in order to accelerate the reaction when the trifunctional organosilane is blended. The catalyst to be added is a tin compound such as tin chloride (SnCl ₂ , SnCl ₄ ), tin oxychloride (SnOHCl, Sn (OH) ₂ Cl ₂ ), tin alkoxide from the viewpoint of reactivity and polymerization stability. Is preferred. These catalysts may be added directly at the time of compounding, or may be added after being dissolved in a solvent such as methanol. If the addition amount is too small or too large, the catalytic effect cannot be obtained, and therefore the molar ratio is preferably within a range of 1/10 to 1/10000 with respect to the trifunctional organosilane, more preferably 1 More preferably within the range of / 100 to 1/2000.

  Next, the isocyanate compound is added in order to improve the adhesion to the base film or the deposited thin film layer by a urethane bond formed by reacting with a polyester polyol or an acrylic polyol. Acts as

  As such isocyanate compounds, monomers such as aromatic tolylene diisocyanate, diphenylmethane diisocyanate, aliphatic xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and polymers and derivatives thereof are used. Are used alone or as a mixture.

  The blending ratio of the polyol compound and the isocyanate compound is not particularly limited, but if the isocyanate compound is too small, curing may be poor, and if it is too much, blocking or the like occurs and there is a problem in processing. . Therefore, the mixing ratio of the polyol compound and the isocyanate compound is preferably 50 times or less of the isocyanate group derived from the isocyanate compound than the hydroxyl group derived from the polyol compound. Particularly preferred is a case where an isocyanate group and a hydroxyl group are mixed in an equal amount, and a known method can be used as the mixing method.

  Next, as a method of preparing a primer solution for forming the heat-crosslinkable primer coat layer, a composite mixed solution in which trifunctional organosilane, a polyol compound and an isocyanate compound are mixed at an arbitrary mixing ratio is prepared. It is formed by coating on a substrate film.

  As a method of making the composite mixed solution, a method of mixing a trifunctional organosilane and a polyol compound, adding a solvent and a diluent, diluting to an arbitrary concentration, and then mixing with an isocyanate compound to make a composite mixed solution, Alternatively, a method in which a trifunctional organosilane is mixed in a solvent in advance and then a polyol compound is mixed and then diluted to an arbitrary concentration by adding a solvent and a diluent, and then an isocyanate compound is added to make a composite mixed solution. and so on.

  Various additives such as tertiary amines, imidazole derivatives, carboxylic acid metal chlorides, quaternary ammonium salts, quaternary phosphonium salts, and other accelerators, phenols, sulfurs, and phosphites It is also possible to add antioxidants, leveling agents, flow preparation agents, catalysts, crosslinking reaction accelerators, fillers and the like as necessary.

  Next, the thickness of the thermally crosslinkable primer coat layer is not particularly limited as long as a uniform coating film can be formed, but the dry film thickness is preferably in the range of 5 to 300 nm. If the thickness is 5 nm or less, a uniform coating cannot be formed, and stable adhesion cannot be obtained. If the thickness is 300 nm or more, physical properties are reached, which is not economical.

  Next, as a method of forming the heat-crosslinkable primer coat layer, for example, a known gravure roll coating method, reverse roll coating method, bar coating method, dropping method or the like can be used.

  In order to improve the adhesion, the surface of the base film is pretreated by a known method such as corona discharge treatment, glow discharge treatment, low temperature plasma treatment, flame treatment, chemical treatment, solvent treatment, etc. There is also. In addition, various known additives and stabilizers such as antistatic agents, ultraviolet absorbers, plasticizers, and lubricants can be used on the front and back surfaces of the base film.

  Next, in order to further improve the gas barrier property of the inorganic oxide vapor-deposited film, a gas barrier coating layer may be laminated on the inorganic oxide vapor-deposited layer. As the gas barrier coating layer, for example, a material comprising at least one of a water-soluble polymer and (a) one or more metal alkoxides and hydrolysates thereof or (b) tin chloride is used. Can do.

The gas-barrier coating layer is provided on the vapor-deposited thin film layer in order to prevent various secondary damages in the post-process of the vapor-deposited thin-film layer and to provide higher gas barrier properties. And depositing a coating agent mainly comprising an aqueous solution or a water / alcohol mixed solution containing at least one of a water-soluble polymer and (a) one or more metal alkoxides and hydrolysates thereof or (b) tin chloride. The gas barrier coating layer is formed by coating on the thin film layer.

  For example, a solution in which a water-soluble polymer and tin chloride are dissolved in an aqueous (aqueous solution or water / alcohol mixed solution) solvent, or a solution in which a metal alkoxide is directly or previously hydrolyzed and mixed. Is formed by coating the vapor-deposited thin film layer and drying by heating.

  Examples of the water-soluble polymer include polyvinyl alcohol (PVA), polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, and sodium alginate.

  In particular, polyvinyl alcohol (PVA) is preferable because of its excellent gas barrier properties. The polyvinyl alcohol (PVA) here is generally obtained by saponifying polyvinyl acetate.

  Examples of the polyvinyl alcohol (PVA) include fully saponified polyvinyl alcohol (PVA) in which only a few percent of acetic acid groups remain from so-called partially saponified polyvinyl alcohol (PVA) in which several tens of percent of acetate groups remain. There is no particular limitation.

  The tin chloride is stannous chloride, stannic chloride, or a mixture thereof, and anhydrides and hydrates of these tin chlorides can also be used.

  Next, as the metal alkoxide, tetraethoxysilane, triisopropoxyaluminum and the like that are relatively stable in an aqueous solvent after hydrolysis are preferable.

  Furthermore, known additives such as isocyanate compounds, silane coupling agents, or dispersants, stabilizers, viscosity modifiers, colorants and the like are added to the coating agent as necessary, as long as the gas barrier properties are not impaired. Can be added.

  As the isocyanate compound added to the coating agent, those having two or more isocyanate groups in the molecule are preferable.

  Examples of such isocyanate compounds include monomers such as tolylene diisocyanate, triphenylmethane triisocyanate, and tetramethylxylene diisocyanate, and polymers and derivatives thereof.

  The gas barrier coating layer is formed on the deposited thin film layer by applying a known method such as a gravure coating method, reverse roll coating method, air knife coating method, etc., followed by heating and drying.

  In this case, the thickness of the gas barrier coating layer is preferably in the range of 0.01 to 50 μm after drying. When the thickness after drying is 0.01 μm or less, sufficient gas barrier properties cannot be obtained, and when it is 50 μm or more, the coating film is liable to crack and adversely affects the gas barrier.

Next, the base film and sealant film, or a method of sequentially laminating a gas barrier film and a sealant film provided with a gas barrier layer on the base film is, for example, a dry lamination method, a non-solvent dry lamination method, or a hot melt lamination method. Well-known methods such as an extrusion lamination method and a sandwich lamination method using the extrusion lamination method can be used as appropriate.

  First, the dry lamination method is a method of laminating one film and the other film via an adhesive, and includes three sections, a coating unit, a drying device, and a nip roller unit, and unwinding, winding, And a tension control system.

  The coating portion generally employs a gravure roll coating method or a reverse roll coating method.

  As the adhesive used in the dry lamination method, laminate adhesives such as polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, and the like can be generally used.

  As the lamination adhesive, a solvent-type adhesive or a solvent-free adhesive is used. However, when a solvent-free adhesive is used, a drying apparatus is unnecessary, and in particular, a non-solvent dry lamination method and I'm calling.

  In the hot melt lamination method, one film and the other film are immediately laminated through a hot melt adhesive composed of a heat-melted ethylene-vinyl acetate copolymer (EVA), a wax, a tackifier, and the like. It is a method to do.

  In the extrusion lamination method, a thermoplastic resin such as a low density polyethylene resin (LDPE) is heated, melted in a cylinder called a cylinder, extruded by applying pressure with a screw, and a T die at the tip of the cylinder. This is a method of extruding the thermoplastic resin dissolved in the form of a curtain from a thin slit to form a film and then directly laminating it on the substrate film.

  At this time, sandwich lamination using the extrusion lamination method to laminate one film and the other film using a thermoplastic resin such as low density polyethylene resin (LDPE) or polypropylene resin (PP) as an adhesive. A method can also be used.

  The laminated film may be printed or may include an anchor coating in addition to the above configuration.

  First, when printing on a substrate film is provided, the printing surface of the film can be printed on either the front or back side, but as in the case of printing on a general plastic film bag, the friction resistance and weather resistance of the ink. In consideration of the above, it is preferable to provide beautiful picture printing on the inner surface of the base film for the purpose of improving the sales promotion effect of the product.

  As the printing ink for performing the printing, a colorant composed of pigments or dyes that give color to the ink, a resin that adheres to the printed material and the resin are stabilized while dispersing and holding the colorant in fine particles. Dissolving the pigments and dyes, maintaining the dispersibility of the ink and fluidity of the ink, and transferring the appropriate amount of ink from the printing plate, a vehicle composed of a solvent, and further dispersibility of the coloring material, color development For the purpose of improvement, prevention of precipitation, and improvement of fluidity, it is formed from an auxiliary agent such as a surfactant. Particularly, the colorant is preferably a pigment having good weather resistance.

The printing method for printing on the base film is not particularly limited as long as it is a printing method capable of printing on the film, but a copper plating is applied to the surface of an iron cylinder (cylinder) to form a base, and the copper plating A release layer is provided on the surface, copper plating is further performed, and a concave surface (cell) is created by a sculpture method or a corrosion method on a copper surface whose surface is polished into a mirror surface, and the printing ink in the cell is applied to the film. The gravure printing method is preferable because it can be printed in a colorful manner even when it is in a tuned state and has a high appealing effect.

  In addition, when printing on the base film, if necessary to improve the adhesion between the base film and the ink, the base film surface may be subjected to pretreatment such as ozone treatment or corona treatment. In order to further improve the adhesion between the base film and the ink, the base film surface may be coated with an anchor coating agent or the like.

  Examples of the anchor coat agent include isocyanate-based (urethane-based), polyethyleneimine-based, polybutadiene-based, and organic titanium-based anchor coat agents, or polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, and polyvinyl acetate-based. Adhesives for laminating such as cellulose and others can be used.

  As a method of coating the anchor coating agent, a known gravure roll coating method, reverse roll coating method, or the like can be used.

  The laminated film constituting the typical packaging bag (A) by the above materials and methods is, for example, biaxially stretched polyethylene terephthalate film (OPET) / adhesive / aluminum foil / adhesive / in order from the outermost layer side. Linear low density polyethylene film (L-LDPE), biaxially stretched polyethylene terephthalate film (OPET) / adhesive / aluminum foil / adhesive / unstretched polypropylene film (CPP), biaxially stretched polyethylene terephthalate film (OPET) / Inorganic oxide deposited thin film layer / adhesive / linear low density polyethylene film (L-LDPE), biaxially stretched polyethylene terephthalate film (OPET) / inorganic oxide deposited thin film layer / adhesive / unstretched polypropylene film (CPP) Biaxially stretched polyamide film (ON) / contact Agent / aluminum foil / adhesive / linear low density polyethylene film (L-LDPE), biaxially stretched polyamide film (ON) / adhesive / aluminum foil / adhesive / unstretched polypropylene film (CPP), biaxially stretched Polyamide film (ON) / Inorganic oxide deposited thin film layer / Adhesive / Linear low density polyethylene film (L-LDPE) Biaxially stretched polyamide film (ON) / Inorganic oxide deposited thin film layer / Adhesive / Non-stretched Examples thereof include, but are not limited to, polypropylene film (CPP). Furthermore, the film used for the outermost layer of the laminated film is not limited to a film having tearability in the vertical and horizontal directions.

  Hereinafter, the packaging bag (A) of the present invention will be described in more detail with specific examples.

As a base film having a linear tearing property constituting the packaging bag (A) of the present invention, a biaxially stretched polyethylene terephthalate film (OPET) having a thickness of 12 μm, manufactured by Unitika Ltd., trade name “Embret PC” A film was used, and a pattern was printed on the back surface of the OPET by a gravure printing method using a gravure ink having a urethane resin as a binder. Furthermore, about 4.0 g / m ² (dry) of urethane adhesive is applied on the printed surface, and a 50 μm-thick linear low density polyethylene resin film (L-LDPE) is used as the sealant film. Then, lamination was performed by a dry lamination method to prepare a laminated film composed of a base film / pattern printing layer / adhesive layer / sealant film having linear tearability.

Next, the roll-shaped laminated film is provided on the upper part of the packaging bag (A) by using a bag making machine, and the upper seal portion (1) and the left and right seal portions (7, 8) are provided on the upper portion of the packaging bag (A). A central seal portion (6) for forming two content storage portions (b, b) is provided on substantially the same line depending on the central portion of the upper seal portion (1), and the upper seal portion (1) As an opening means for tearing and opening the packaging bag (A) at the substantially central portion of the upper opening, the upper opening convex portion (11), which is pointed upward toward the substantially central portion below the upper seal portion (1), Left and right opening convexes (12, 12) that are pointed in the respective directions, and provided with opening opening holes (5b) through which a user can put their fingers when opening. Opening hand in which the unsealed portion that becomes the content outlet (9) is located in the extending direction of the convex portions (12, 12) It was prepared packaging bag (A) is provided.

  In Example 1, except that the product film “Emblem NC” manufactured by Unitika Co., Ltd., which is a biaxially stretched polyamide film (ON) having a thickness of 15 μm, was used as the base film having linear tearability. In the same manner as in Example 1, a packaging bag (A) was produced.

  In Example 1, aluminum oxide (alumina) was applied to a biaxially stretched polyethylene terephthalate film (OPET) having a thickness of 12 μm (trade name “Embret PC” film, manufactured by Unitika Ltd.) having a linear tearing property. A packaging bag (A) was produced in the same manner as in Example 1 except that a gas barrier film was formed by vacuum deposition to form a deposited thin film layer having a thickness of 20 nm.

  In Example 1, aluminum oxide (alumina) was vacuum-deposited on a 15 μm thick biaxially stretched polyamide film (ON) (trade name “Emblem NC” film manufactured by Unitika Co., Ltd.) on a substrate film having linear tearability. A packaging bag (A) was produced in the same manner as in Example 1 except that a gas barrier film was formed by vapor deposition to form a deposited thin film layer having a thickness of 20 nm.

  In Example 1, aluminum oxide (alumina) was vacuum-deposited on a 15 μm thick biaxially stretched polyamide film (ON) (trade name “Uniathlon” film, manufactured by Idemitsu Kosan Co., Ltd.) on a substrate film having linear tearability. A gas barrier film formed by vapor deposition to form a deposited thin film layer having a thickness of 20 nm is used, and a non-stretched polypropylene film (CPP) having a thickness of 60 μm is used as the sealant film in the same manner as in Example 1. Thus, a packaging bag (A) was produced.

  In Example 1, a packaging bag (as in Example 1) except that a tear line (15) is provided along a substantially center line from the upper end to the lower end of the central seal portion (6) of the packaging bag (A). A) was prepared.

  In Example 2, a packaging bag (as in Example 2) except that a tear line (15) is provided along the substantially center line from the upper end to the lower end of the central seal portion (6) of the packaging bag (A). A) was prepared.

  In Example 3, a packaging bag (as in Example 3) except that a tear line (15) is provided along the substantially center line from the upper end to the lower end of the central seal portion (6) of the packaging bag (A). A)
Produced.

  In Example 4, a packaging bag (as in Example 4) except that a tear line (15) is provided along the substantially center line from the upper end to the lower end of the central seal portion (6) of the packaging bag (A). A) was prepared.

  In Example 5, a packaging bag (as in Example 5) except that a tear line (15) is provided along a substantially center line from the upper end to the lower end of the central seal portion (6) of the packaging bag (A). A) was prepared.

  Next, about the evaluation method of the packaging bag (A) obtained in Examples 1-4, from the unsealed part (10) of the packaging bag (A) to the content storage part (b) on the left side as the contents Two types of packaging bags filled with mayonnaise, filled with mustard as the contents in the right content storage part (b), and heat-sealed both unsealed parts (10) (A) was obtained.

  About the packaging bag (A) obtained in Example 5, from the unsealed part (10) of the packaging bag (A), the same kind of liquid seasoning is added as contents to the left and right content storage parts (b, b). Each was filled and both unsealed parts (10) were heat-sealed and sealed, and then retort sterilized to obtain a packaging bag (A) containing the contents.

  In such a state, the opening property and the dispensing property of the packaging bags (A) of Examples 1 to 5 were evaluated. It was possible to open easily by putting a finger into the opening start hole (5b), cutting the upper seal portion (1) upward, and then tearing it in the left-right direction. In addition, it was folded in two and the bag could be opened easily at the same time on the left and right sides, and the contents of each could be taken out simultaneously.

  Next, about the evaluation method of the packaging bag (A) obtained in Examples 6 to 9, the contents are transferred from the unsealed portion (10) of the packaging bag (A) to the left and right content storage portions (b, b). The same kind of mayonnaise was filled as a product, and both unsealed parts (10) were heat-sealed to obtain a packaging bag (A) containing the same kind of contents.

  About the packaging bag (A) obtained in Example 10, from the unsealed part (10) of the packaging bag (A), the same kind of liquid seasoning is added as contents to the left and right content storage parts (b, b). Each was filled and both unsealed parts (10) were heat-sealed and sealed, and then retort sterilized to obtain a packaging bag (A) containing the contents.

  In such a state, the separability of the right and left contents storage portions (b, b) of the packaging bags (A) of Examples 6 to 10 was evaluated. A sewing machine that is provided along a substantially center line from the upper end to the lower end of the central seal portion (6) by inserting a finger into the opening start hole (5b) and cutting the upper seal portion (1) upward. When it was cut along the tear line (15) consisting of eyes, it was easy to tear and the left and right contents storage parts (b, b) could be separated.

It is a top view which shows 1st Embodiment of the conventional packaging bag. It is a perspective view which shows the state which opened the packaging bag of below-mentioned FIG. It is a top view which shows the state before providing the opening means of the packaging bag which concerns on this invention. It is a top view which shows the state before providing the opening means of the packaging bag which concerns on this invention. It is a top view which shows 1st Embodiment of the packaging bag which concerns on this invention. It is a top view which shows 2nd Embodiment of the packaging bag which concerns on this invention. After filling sealing the contents to the packaging Sobukuro is a perspective view showing a folded state into two.

A ... Packaging bag b ... Content storage part 1 ... Upper seal part 2 ... Upper edge 3 ... Tear start part 4 ... Tear line 5a ... Hatch hole 5b ..Opening start hole 6 ... Center seal part 7 ... Left seal part 8 ... Right seal part 9 ... Content take-out port 10 ... Unseal part 11 ... Upper convex Part 12: convex part for opening left / right 13 ... convex part for folding start of central seal part 14 ... notch for opening 15 ... tear line

Claims (3)

At least in a packaging bag having a seal part on one side of the periphery, an upper seal part is provided on the upper part of the packaging bag, and two content storage parts are formed on substantially the same line that hangs down the central part of the upper seal part. A center seal portion for the upper seal portion, and an upper opening convex portion that is pointed upward at a substantially central portion of the upper seal portion for tearing and opening the packaging bag at a substantially central portion below the upper seal portion; The left and right opening protrusions are provided with left and right opening protrusions that are pointed in the left and right directions, and are provided with opening opening holes that allow the user to insert their fingers when opening. The packaging bag is characterized in that it is provided with an opening means in which an unsealed part serving as a content outlet is located.   The packaging bag according to claim 1, wherein a cut line is provided along a substantially center line from the upper end to the lower end of the central seal portion.   The packaging bag according to claim 1, wherein a tear start portion is provided at a central portion of the upper edge of the upper seal portion as the opening means.

Images