JP2019081606A - Laminated multilayer body and packing bag made of the same - Google Patents

Abstract

To provide a packing bag which is high in seal strength, hard to be torn even when dropped with a content stored therein, excellent in interlaminar adhesion between a base layer and a sealant layer, and suitable for mass production.SOLUTION: A laminated multilayer body which is a constituent material of a packing bag: is formed by laminating a printed nylon base layer, a vapor-deposited PET layer and a sealant film using a two-component urethane adhesive; and has a multilayer structure where the nylon base layer, a printed layer, an adhesion layer, the vapor-deposited PET layer, an adhesion layer and the sealant film are put one on top of the other. The sealant film of the laminated multilayer body is made through a coextrusion process of three layers, namely a base side sealant layer, an intermediary sealant layer and an inner sealant layer.SELECTED DRAWING: None

Description

  The present invention relates to a laminate, which is formed by laminating synthetic resin films, and a packaging bag which is formed by the laminate.

In recent years, a packaging bag made of a synthetic resin film has been widely used as a packaging material for packaging and storing various liquids and powders such as food, medicine, cosmetics and detergents. Moreover, as a packaging bag which consists of such a synthetic resin film, a sealant layer may be located in the inside of a laminate laminated body (multilayer film) which laminated | stacked the sealant layer (heat adhesive layer) inside the base material layer. A pouch, a gusset bag, etc. which are formed by laminating two sheets on one another and heat sealing the outer periphery are known (Patent Document 1).
(Patent Document 1).

JP, 2017-88180, A

  However, depending on the material of the sealant layer, a packaging bag using the above-described conventional laminate can not exhibit sufficient seal strength, and the bag resistance in the case where the contents are dropped is reduced. It will decrease. In addition, depending on the combination of the material of the base material layer and the material of the sealant layer, there is a problem that the interlayer adhesion deteriorates and the productivity decreases.

  The object of the present invention is to solve the problems of the packaging bag using the above-mentioned conventional laminate, to have a high seal strength and to be difficult to break the bag even when dropped in a state in which the contents are stored. An object of the present invention is to provide a packaging bag suitable for mass production with good interlayer adhesion between the rubber and the sealant layer.

  Among the present inventions, the invention described in claim 1 is a laminate laminate for forming a packaging bag, which comprises at least a base material layer, an adhesive layer and a sealant layer laminated in order, and the base material layer is at least And any one of polyethylene terephthalate resin film, polyamide resin film, polyethylene naphthalate resin film, polyacrylonitrile resin film, polycarbonate resin film, and polyimide resin film, and the sealant layer is a laminate of a plurality of layers. It is a feature.

  The invention described in claim 2 is the invention described in claim 1, wherein, in addition to the substrate layer, the adhesive layer and the sealant layer, a printing layer, a barrier layer, an adhesive layer, an anchor coat layer, a surface coat It is characterized in that it includes any layer of layers.

  The invention described in claim 3 is the invention described in claim 1 or claim 2, wherein the sealant layer has a three-layer structure including an inner sealant layer, an intermediate sealant layer, and a substrate-side sealant layer. It is characterized by

  The invention described in claim 4 is characterized in that, in the invention described in claim 3, the resin component constituting the intermediate sealant layer contains 95% or more of a biomass-derived polyolefin.

  The invention described in claim 5 is characterized in that, in the invention described in claim 3 or claim 4, the substrate-side sealant layer contains 95% or more of petroleum-derived polyolefin. .

  In the invention described in claim 6, according to the invention described in any one of claims 3 to 5, the inner sealant layer has a composition containing 95% or more of petroleum-derived polyolefin, or 95 of biomass-derived polyolefin. % Or more.

  The invention described in claim 7 is a standing pouch comprising the laminated laminate for forming a package according to any one of claims 1 to 6.

  The invention described in claim 8 is characterized in that, in the invention described in claim 7, it has an auxiliary member which becomes a flow path when pouring out the stored contents.

  The invention according to claim 9 is the invention according to claim 7, which is formed by heat sealing two laminated laminates stacked so that the sealant layer is on the inside at two separate places. And a groove-shaped rib formed by bending the laminated laminate so as to project outward along the extraction channel, and curing the laminated laminate on at least one side of the rib And a hardened portion.

  The invention described in claim 10 is a packaging bag comprising the laminated laminate for forming a packaging body according to any one of claims 1 to 6, wherein the packaging bag is a flat bag, a back sticking bag, a gusset bag, It is characterized by being any one of tubes.

  The packaging bag according to the present invention has high seal strength, is difficult to be broken even when dropped in a state in which the contents are stored, has good interlayer adhesion between the base material layer and the sealant layer, and is mass-productive Suitable for Moreover, according to the laminate laminate according to the present invention, it is possible to efficiently manufacture a packaging bag having such excellent resistance to bag-breaking and interlayer adhesion with high yield.

It is explanatory drawing (front view) which shows the packaging bag (standing pouch with an auxiliary member) formed of the laminate laminated body. It is explanatory drawing which expands and shows the AA line cross section in FIG. It is an explanatory view (front view) showing a packaging bag (standing grooved pouch with a grooved rib) formed of a laminate laminate. It is explanatory drawing which expands and shows the AA line cross section in FIG. It is explanatory drawing (front view) which shows the packaging bag (standing pouch which has a spout) formed of the laminate laminated body.

  Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, in the following description, "-" regarding the characteristic of each component, content, and addition amount shall mean below the numerical value of the left side more than the numerical value of the right side in principle.

[Composition of laminate]
The laminate laminate for forming a packaging bag according to the present invention (hereinafter, simply referred to as laminate laminate) is formed by sequentially laminating at least a base material layer, an adhesive layer and a sealant layer, and in addition, a printed layer, A barrier layer (oxygen barrier layer, water vapor barrier layer or the like), an adhesive layer, an anchor coat layer or the like can be stacked. The properties of each layer will be described below.

<Base layer>
The base material layer may be a single layer or a laminate, and polyethylene terephthalate (PET) resin film, polyamide (PA) resin film, polyethylene naphthalate (PEN) resin film, polyacrylonitrile (PAN) resin film, polycarbonate (PC) resin A film, a polyimide (PI) resin film, etc. can be used. Among them, polyethylene terephthalate (PET) resin film and polyamide (PA) resin film are preferably used. Moreover, when a polyethylene terephthalate (PET) resin film is made of a PET resin containing a plant-derived alcohol component, it is preferable from the viewpoint of environmental consideration. In addition, the laminate may include a vapor deposition layer, a metal foil, a print layer, a functional layer, and a surface coat layer. The thickness of the substrate film is not particularly limited, but is preferably 10 to 200 μm.

<Adhesive layer>
The adhesive layer can be formed by a sand poly lamination method using polyethylene resin or a dry lamination method using an adhesive. Moreover, you may use those methods together. As the adhesive, a two-part curable urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, etc. are used. be able to. From the viewpoint of adhesiveness, it is preferable to use any of a two-component curable urethane adhesive, a polyester urethane-based adhesive, and a polyether urethane-based adhesive, and in particular, a two-component curable urethane-based adhesive is preferable. Moreover, it is preferable to use what contains the component of vegetable origin as a two-component curing type urethane type adhesive agent.

<Printing layer>
The printing layer is formed by printing the ink material on the back surface of the base layer. As a result, the printed layer can be viewed from the outer side of the packaging bag. The printing layer contains one or more of conventional ink vehicles as main components, and, if necessary, plasticizers, stabilizers, antioxidants, light stabilizers, ultraviolet light absorbers, curing agents, crosslinking agents. Add one or more of additives such as lubricants, antistatic agents, and fillers, and optionally add colorants such as dyes and pigments, and sufficiently knead with solvents, diluents, etc. An ink composition can be prepared and formed by the ink composition. Also, using the ink composition, for example, using a printing method such as gravure printing, offset printing, letterpress printing, screen printing, transfer printing, flexographic printing, etc., desired printing comprising characters, figures, symbols, patterns, etc. A pattern can be formed.

<Barrier layer>
The barrier layer imparts a high water vapor barrier property and gas barrier property to the packaging bag in order to prevent the contents to be sealed from coming into contact with moisture and oxygen. As the barrier layer, a metal foil or a vapor-deposited film obtained by vapor-depositing a metal or metal oxide on a resin film can be used. An aluminum foil etc. can be mentioned as metal foil, The thickness can be 5-20 micrometers. As the vapor deposition film, biaxially stretched polyethylene terephthalate (VMPET) having an aluminum vapor deposition layer or a silica vapor deposition layer, biaxial stretching polypropylene (VMOPP) having an aluminum vapor deposition layer or a silica vapor deposition layer, or the like can be used.

<Anchor coat layer>
The anchor coat layer is a thin film layer for improving the adhesion of the adhesive layer. For example, an aqueous dispersion in which a polyolefin copolymer resin containing an unsaturated carboxylic acid or an anhydride thereof is dispersed can be applied and dried by heating to form a thin film layer. In particular, when laminating a barrier layer and a base material layer by a sand polylamination method using a polyethylene resin, it is preferable to use a barrier layer on which an anchor coat layer is laminated in advance.

<Sealant layer>
The sealant layer is a sealant film made of a polyolefin resin. The polyolefin resin layer to be a sealant layer is formed by extruding a polyolefin resin onto the surface of the above-mentioned anchor coat layer, or by extrusion laminating (sandwich laminating) a polyolefin resin film using a similar polyolefin resin, etc. Can be formed by In recent years, the demand for environmental protection has been increasing, and it is also preferable to use a sealant layer containing a resin component derived from biomass. Here, the biomass-derived polyolefin resin referred to herein is a polyolefin resin produced using biomass-derived ethanol as a raw material, and in particular, biomass-derived resin obtained from plant raw materials such as corn, sugar cane, beet, manioc etc. The thing made from fermented ethanol of these can be used suitably.

  The sealant film used for the laminate laminate according to the present invention needs to be composed of two or more layers, but an inner sealant layer which becomes the inside of the packaging bag when forming the packaging bag, and an intermediate sealant The laminated film of 3 layer structure formed by laminating | stacking the layer and the base material side sealant layer which is a layer which contact | connects a base film in order can be used suitably.

  Then, the inner sealant layer can be formed of a mixture of a biomass-derived polyolefin resin and a petroleum-derived polyolefin resin, or can be formed using those polyolefin resins alone.

When using a biomass-derived polyolefin resin as a main resin, it is preferable to set the biomass-derived polyolefin resin to 95% or more and 100% or less. When using petroleum-derived polyolefin resin as a main resin, it is preferable to make petroleum-derived polyolefin resin 95% or more and 100% or less. That is, it is preferable that the inner sealant layer is excessively made of either a biomass-derived polyolefin or a petroleum-derived polyolefin, so that the hand-cutting property of a packaging bag (a pouch or the like) is improved. Further, the inner sealant layer, preferably the density is 0.91~0.96kg / ^{m 3,} more preferable to be ^{0.91~0.94kg / m 3, 0.91~0.92kg / m} 3 Is particularly preferred. Furthermore, the thickness of the inner sealant layer can be 15 to 70 μm.

Further, the intermediate sealant layer can be formed of a mixture of a biomass-derived polyolefin resin and a petroleum-derived polyolefin resin, or can be formed using those polyolefin resins alone. In particular, the biomass-derived polyolefin resin is preferably 95% or more, and more preferably 100%. The intermediate sealant layer, preferably the density is 0.91~0.96kg / ^{m 3,} more preferable to be ^{0.91~0.94kg / m 3, 0.91~0.92kg / m} 3 Is particularly preferred. Further, the thickness of the intermediate sealant layer can be 20 to 90 μm. From the viewpoint of environmental impact, the higher the proportion of biomass-derived polyolefin, the better, and the thickness of the middle sealant layer is preferably the same as or thicker than the thickness of the inner sealant layer, and the thickness of the substrate side sealant layer Preferably it is the same or thicker. Moreover, as a result of examination by the present inventors, it is confirmed that there is no mixing unevenness of resin and it is possible to manufacture a packaging bag (a pouch etc.) with good hand cutability by making the intermediate sealant layer 100% of biomass origin polyolefin. The

On the other hand, it is preferable that the substrate side sealant layer does not contain a biomass-derived polyolefin resin and has a petroleum-derived polyolefin resin as a main component, but the biomass-derived polyolefin is also 1% or more and 5% or less It can also be included. In addition, the substrate-side sealant layer preferably has a density of 0.91 to 0.96 kg / m ³ , more preferably 0.91 to 0.94 kg / m ³ , and 0.91 to 0.92 kg / m ^3. It is especially preferable that it is m ³ . Furthermore, the substrate-side sealant layer is made of a petroleum-based polyolefin-based resin as a main component, whereby the adhesiveness to the substrate side when using the adhesive is improved. The thickness of the substrate-side sealant layer can be 15 to 40 μm. In addition, the substrate-side sealant layer has a percentage of polyethylene derived from biomass of 5% or less from the viewpoint of adhesion to the substrate film, with or without using an adhesive. Is preferred.

  In addition, the amount of the biomass-derived polyolefin resin contained in the sealant film (the compounding ratio with respect to the entire sealant film) is preferably 15% or more, more preferably 20% or more as a lower limit from the viewpoint of environmental consideration. . Moreover, it is preferable that it is 80% or less, and it is further more preferable that it is 65% or less from a viewpoint of intensity | strength and adhesiveness when setting it as a packaging bag.

[Configuration of Packaging Bag Formed by Laminated Laminate]
The packaging bag formed by the laminate of the present invention may be of various shapes such as a two-way bag, a three-way bag, a pouch, and a gusset bag, and is not particularly limited. In addition to being able to be filled with the contents of (1), it is preferable because productivity is improved. One embodiment of a packaging bag formed by the laminate of the present invention is shown in FIGS.

<Embodiment 1 of Packaging Bag: Standing Pouch with Auxiliary Member Type>
As shown in FIG. 1, an unsealed portion 215A, which is a flow path for the spout 214, is obliquely located above the packaging bag 205 between the upper corner of the packaging bag 205, ie, the side end sealing portion 205b and the upper side 214b. It is provided to face the The pouring spout 214 has a flow path forming seal portion 215a, 215b which constitutes both sides of the flow path 215 after opening, a flow path sealing seal portion 215c which seals the flow path 215 before opening, and a knob during opening The pull tab 216 to be formed is formed by heat-sealing the body films (laminated laminate) 202 and 202 continuously from the upper portion of the one side end seal portion 205b.

  The flow path forming seal portions 215 a and 215 b respectively define both sides of the flow path 215 when the pouring outlet 214 is opened. That is, the unsealed portion 215A between one flow passage forming seal portion 215a and the other flow passage forming seal portion 215b serves as the flow passage 215. In the flow path 215, an auxiliary member 250 made of polyolefin (polyethylene) for securing the flow path is disposed. The auxiliary member 250 preferably contains 50% to 100% of a biomass-derived polyolefin resin. FIG. 2 is an enlarged view of the vertical cross section of the installation portion of the auxiliary member 250. The auxiliary member 250 is partially formed on a part of the body film 202 on one side (front side) of the front and back by a point seal 209. It is heat-welded and fixed. The auxiliary member 250 is preferably a straw-like tube, and can be a half straw-like shape shaped like a bamboo vertically split, and any of them can be adopted. Further, by using a laminate of a plurality of sealant films as the sealant layer of the body film (laminated laminate) 202, point sealing of the auxiliary member 250 to the back surface of the body film 202 becomes easy, and It is possible to increase the adhesion strength of the auxiliary member 250 to the film 202.

  Further, the tip end of the flow path 215 is closed by the flow path sealing portion 215 c. The space between the flow path forming seal portion 215 b and the other side end seal portion 205 b is opened as a filling port 213, and the contents can be filled (stored) in the packaging bag 205 through the filling port 213. It is. After the contents are filled, the upper seal portion 213A is formed by heat sealing the body part films 202 and 202 at the periphery of the filling port 213, and the filling port 213 is closed.

  In addition, in order to facilitate opening, the opening 214 is provided with an opening guide line 208 composed of a half cut groove or the like formed by a laser so as to cross the unsealed portion 215A which becomes a flow path. A pull tab 216 formed by a first cutout line 217 is provided at one end of the opening guide line 208. The opening guide line 208 is preferably provided on each of the two body films 202 and 202 including the spout 214.

  On the other hand, a first cutout line 217 for starting unsealing is provided in the seal portion above (between the upper side 214b) and the unsealed portion 215A which becomes the flow path. Further, in the seal portion on the side (between the side end seal portion 205b) of the non-sealed portion 215A which becomes the flow path, the flow path forming seal portion 215a having a predetermined width is left between the unsealed portion 215A. A second cut-out line 212 is provided for cutting out. In the packaging bag 205 having such a configuration, the pouring spout 214 is opened along the opening guide line 208, the first cutout line 217, and the second cutout line 212, whereby the spout 214 is opened.

<Embodiment 2 of Packaging Bag: Standing Pouch with Grooved Ribs>
As shown in FIG. 3, at the upper corner of the packaging bag 310, a spout 312 having a flow path 313 directed obliquely upward of the packaging bag is provided. FIG. 4 is an enlarged view of the vertical cross section of the installation portion of the spout 312, showing that the body films (laminated laminates) 311, 311 are continuously connected from the top of one side edge seal portion 311a. By heat sealing, the flow path forming seal portions 313a and 313b are formed. The flow path forming seals 313 a and 313 b are configured to respectively define both sides of the flow path 313 when the flow path 313 is opened by removing the tip end of the spout 312. That is, the unsealed portion between one flow passage forming seal portion 313 a and the other flow passage forming seal portion 313 b is the flow passage 313 of the spout 312.

  Further, the tip end of the flow path 313 is closed by the sealing portion 312 c. The space between the flow path forming seal portion 313 b and the side edge seal portion 311 b is opened as a filling port 317, and the contents can be filled in the packaging bag 310 through the filling port 317. After filling the contents, the upper part sealing portion is formed by heat sealing the body part films 311 and 311 at the periphery of the filling port 317 and the filling port 317 is closed.

  Moreover, in order to facilitate opening, the pouring opening 312 is provided with an opening auxiliary line 312a formed of a half cut groove or the like formed by a laser so as to cross the flow path 313. At one end side, a tab (knob) 312 b formed by a cutout line (penetration scar) 312 c is provided.

  Furthermore, in the packaging bag 310, a groove-like rib 314 formed so as to project a part of the film 311 outward along the flow path 313 of the spout 312 is provided. On both sides, cured portions 315a and 315b obtained by crystallizing (hardening) at least a part of the resin constituting the film 311 are provided.

  The rib 314 forms a plurality of linear deformations in the film 311, is processed into a groove shape, and is formed so as not to be restored flat. The rib 314 and its linearly deformed portion can be formed by pressing the film 311 in a concavo-convex shape. The ribs 314 are formed convex toward the film surface when viewed from the outside of the bag.

  The ribs 314 are preferably formed by pressing the film without heating (e.g., at a normal temperature of about 10 to 40 [deg.] C.). If it is not heated, the flowability of the resin that makes up the film 311 is low, so the formation of the fine ribs 314 becomes easier, and it is possible to form the strong ribs 314 that are not easily crushed. Also by using a plurality of laminated sealant films as the sealant layer of the body film (laminated laminated body) 311, 311, the formation of the fine ribs 314 becomes easier, and the ribs 314 are hard to crush and durable. Formation of

  The curing portions 315a and 315b are portions where the film 311 is locally cured by heating and cooling processing. The curing portions 315a and 315b are formed between the rib 314 and the flow path forming seals 313a and 313b, respectively. The hardened portions 315a and 315b are disposed along the ribs 314 and are formed planarly. In addition, since the rib 314 is curved in a convex shape upward, and the inner end edge of each of the hardened portions 315 a and 315 b is curved along the shape of the rib 314, the shape of the rib 314 ( The outwardly bulging shape can be held for a long time.

  Also, since the rib 314 is not cured like the cured portions 315a and 315b, it is easier to bend than the cured portions 315a and 315b. Therefore, when the packaging bag 310 is opened at the time of use and the contents are poured out, the curing portions 315a and 315b on both sides are spread apart from each other around the flow path forming seal portions 313a and 313b by the weight of the contents. The outlet 312 opens. That is, at the portion where the rib 314 is formed, the body films 311 and 311 expand so as to bend toward the outside (the outside of the body films 311 and 311).

  Since the body part films 311 and 311 forming the flow path 313 have the curing parts 315a and 315b, the opening state of the pouring outlet 312 can be maintained even if the flow rate of the contents is reduced. In addition, since the rib 314 is provided substantially at the center of the flow passage 313, the cross-sectional area when the flow passage 313 is opened can be increased. Thereby, the refilling of the content from the packaging bag 10 to the container 1 can be efficiently implemented in the state which orient | assigned the opened pouring outlet 312 to the pouring spout 2 of the container (or inserted).

  The formation of the curing portions 315a and 315b at the time of manufacturing the packaging bag 310 is carried out by heating and cooling the body film 311, 311 to crystallize at least a part of the resin constituting the body film 311, 311. It is preferable to use a method of

<Third Embodiment of Packaging Bag: Standing Pouch Having Spout>
FIG. 5 shows a standing pouch 401 as an example of the refill container. The standing pouch 401 has a pair of opposing flat portions (body films on the front and back) 402, 402, a bottom portion 403 closing the bottom of the refill container, and a spout 410 for pouring.

  The flat portions 402, 402 are sealed at the upper end edges and sealed at the opposite end edges (the meshed portion in FIG. 5 shows the sealed portion). The lower end edges of the flat portions 402, 402 are respectively sealed to the end edge of the bottom portion 403 opposite to the lower end edges of the flat portions 402, 402. The bottom portion 403 is folded in half at a central fold 404 (folded), and is folded so that the fold 404 is on the upper side of the standing pouch 401. The bottom surface portion 403 is configured to form a bottom portion orthogonal to the flat surface portions 402, 402 by being spread in the front-rear direction from the folded state along with the bending of the flat surface portions 402, 402 by filling the contents. ing.

  The spout 410 for pouring is attached to the upper end edge of the standing pouch 401. The spout 410 for spouting includes a spout main body and a cap 419 which freely opens and closes the outlet side of the cylindrical spouting portion formed on the spout main body. In the present embodiment, an example of the standing pouch in which the spout 410 for pouring is attached to the upper center of the container body 401A is shown, but the spout 410 for pouring is an upper portion of the container body 401A It is also possible to provide them at offset positions on the side in the width direction. Moreover, it is also possible to provide the spout 410 for pouring out by providing the inclined part which made the edge incline diagonally at the corner of the side part of the width direction of the container main-body part 401A.

  EXAMPLES Hereinafter, the laminate and the packaging bag according to the present invention will be described in detail by way of examples, but the present invention is not limited to the aspects of the examples at all and within the scope of the present invention. It is possible to change suitably. Moreover, the evaluation method of the physical property in an Example and a comparative example and a characteristic is as follows.

<Interlayer adhesion>
The peel strength (so-called 180 ° peel strength) at the interface between the sealant layer and the other layers (the base layer, the deposited PET layer, the aluminum barrier layer, etc.) in the laminate body obtained in Examples and Comparative Examples, Using an Tensilon tensile tester under an atmosphere of 24 ° C. × 65% RH, a tensile velocity of 300 mm / min. It measured on condition of. And interlayer adhesion was evaluated by the following three steps.
◎: No delamination occurred and cohesive failure of any layer of the laminate layer occurred.
○: Delamination occurred in only a part, but delamination was hardly seen.
Δ: Delamination was observed in some places.

<Drop test (fall resistance)>
Water (about 300 cc) was put into the packaging bag manufactured in the example and comparative example, and then the opening at the top of the packaging bag was sealed by heat sealing. Then, the packaging bag containing the water is allowed to freely fall from a height of 200 cm to a concrete floor surface with the bottom facing the floor surface, and whether or not the packaging bag after the drop has a tear or not Was visually evaluated. In each of the example and the comparative example, 1,000 packaging bags having the same shape were formed, and each packaging bag was evaluated for the presence or absence of a torn bag.
◎: 0 to 1 out of 1,000 bags were opened.
○: 2 to 10 bags were broken in 1,000 out of 1,000.
X: Of 1,000 pieces, 11 or more bags were torn.

<Hands-off nature>
The corner portion (extracted portion of the contents) of the upper end of the standing pouch of FIGS. 1 and 3 manufactured in the embodiment and the comparative example is a worker along the opening guide line (the opening guide line 208 or the opening guide line 308) The easiness of cutting when cut by hand was evaluated sensoryally in the following three steps.
:: can be cut very easily without applying a large force ○: can be cut without applying a large force Δ: can not be cut without applying a significant force ×: hand Force can not cut

<Adhesiveness of point part>
A sealant layer in a laminate laminate using a semi-finished product in which the auxiliary member 250 is heat-sealed (point-sealed) on the inner surface (the sealant layer surface) of the laminate laminate obtained in the manufacturing process of the standing pouch of FIG. The peel strength (point partial peel strength) at the interface between the above and the auxiliary member 250 was manually peeled off the point seal in an atmosphere of 24 ° C. × 65% RH. And according to the peeling condition, it sensory-evaluated by the following three steps (it repeated 3 times and evaluated average).
○: The strength of the point bonding portion was sufficiently strong and it was difficult to peel off. The mark of the point seal was clearly attached to the point seal part of the auxiliary member after peeling off.
Δ: The point bonding portion was slightly difficult to peel off. A trace of the point seal was faintly attached to the point seal portion of the auxiliary member after peeling off.
X: The point adhesion part was easy to peel off. The point seal portion of the auxiliary member after peeling was not marked with a point seal.

<State of cured part>
Work the hardness of the cured portions 315a and 315b (portions holding the grooved rib shape) at the corners (extraction portions of contents) of the upper end of the standing pouch of FIG. 3 manufactured in the example and the comparative example The sensory evaluation was made in the following three steps according to the tactile sensation of the person (it was repeatedly evaluated three times and averaged).
○: Hardened part has sufficient hardness Δ: Hardened part has a certain degree of hardness ×: Hardened part does not have necessary hardness

Moreover, the properties of the synthetic resin film and the like constituting each layer (other than the sealant layer) of the laminate body manufactured in the example and the comparative example are as follows.
Nylon base layer: 15 μm thick biaxially stretched nylon film PET base layer: 12 μm thick stretched polyethylene terephthalate film Vapor deposited PET layer: 12 μm thick VMPET (metal vapor deposited film with aluminum vapor deposited on one side) Yes, with polyethylene terephthalate film deposited with aluminum)
· Printing layer: An ink coating layer composed of ... (coating amount: ... g / m ² )
・ Adhesive layer: Coating layer consisting of two-component mixed urethane adhesive (coating amount: ... g / m ² )
Aluminum barrier layer: 9 μm aluminum foil

  Moreover, in manufacture of the laminate body of an Example and a comparative example, the following five types of sealant films were utilized for formation of a sealant layer.

<Sealant film 1>
The sealant film 1 is a laminated sealant film formed by laminating three layers of a substrate side sealant layer, an intermediate sealant layer and an inner sealant layer by coextrusion. In addition, the biomass degree of this whole lamination | stacking sealant film was 75%.
· Substrate side sealant layer: Layer of 100 parts by mass of petroleum-derived LLDPE (thickness 20 μm)
Intermediate sealant layer: Petroleum-derived LLDPE is based on 98 parts by mass of plant-derived polyolefin resin (plant-derived LLDPE (C-SLL 118 manufactured by Braschem, density 0.916 kg / m ³ , MFR = 1.0 g / 10 min) Layer (50 μm thick) mixed in proportion of 2 parts by mass
Inner sealant layer: Petroleum-derived LLDPE is based on 98 parts by mass of plant-derived polyolefin resin (plant-derived LLDPE (C-SLL 118 manufactured by Braschem, density 0.916 kg / m ³ , MFR = 1.0 g / 10 min) Layer (30 μm thick) mixed in proportion of 2 parts by mass

<Sealant film 2>
The sealant film 2 is a laminated sealant film formed by laminating three layers of a substrate side sealant layer, an intermediate sealant layer and an inner sealant layer by coextrusion. In addition, the biomass degree of this whole lamination | stacking sealant film was 25%.
· Substrate side sealant layer: A layer consisting of petroleum derived LLDPE only (35 μm in thickness)
Intermediate sealant layer: A layer consisting only of a plant-derived polyolefin resin (plant-derived LLDPE (C4-SLL118 manufactured by Blaschem, density 0.916 kg / m ³ , MFR = 1.0 g / 10 min) (thickness 30 μm)
· Inner sealant layer: A layer consisting of petroleum-derived LLDPE only (thickness 35 μm)

<Sealant film 3>
The sealant film 3 is a laminated sealant film formed by laminating three layers of a substrate side sealant layer, an intermediate sealant layer, and an inner sealant layer by coextrusion. In addition, the biomass degree of this whole lamination | stacking sealant film was 67%.
· Substrate side sealant layer: A layer consisting of petroleum derived LLDPE only (thickness 30 μm)
Intermediate sealant layer: A layer consisting only of plant-derived polyolefin resin (plant-derived LLDPE (C-SLL 118 manufactured by Braschem, density 0.916 kg / m 3, MFR = 1.0 g / 10 min) (thickness 50 μm)
Inner sealant layer: 3 parts of petroleum-derived LLDPE relative to 97 parts by mass of plant-derived polyolefin resin (plant-derived LLDPE (C-SLL 118 manufactured by Blaschem, density 0.916 kg / m 3, MFR = 1.0 g / 10 min) Layer (20 μm thick) mixed in proportions by mass

<Sealant film 4>
The sealant film 4 is a single layer sealant film. In addition, the biomass degree of this whole sealant film was 100%.
Monolayer sealant film: A monolayer composed of only 100 parts by mass of plant-derived polyolefin resin (plant-derived LLDPE (C-SLL 118 manufactured by Braschem, density 0.916 kg / m ³ , MFR = 1.0 g / 10 min) Sealant film (thickness 110 μm)

<Sealant film 5>
The sealant film 5 is a single layer sealant film. In addition, the biomass degree of this whole sealant film was 50%.
Single-layer sealant film: petroleum-based with respect to 50 parts by mass of plant-derived polyolefin resin (plant-derived LLDPE (C-SLL 118 manufactured by Braschem, density 0.916 kg / m ³ , MFR = 1.0 g / 10 min) Single-layer sealant film (110 μm thick) made of 50 parts by weight of LLDPE

Example 1
A laminated laminate having the following layer constitution was produced by laminating a nylon base material layer subjected to printing, a vapor deposited PET layer and the sealant film 1 using a two-component mixed urethane adhesive.
Nylon base layer / printing layer / adhesive layer / deposited PET layer / adhesive layer / sealant film 1

  And the standing pouch of the shape shown in FIG. 1 which has predetermined | prescribed magnitude | size (length x width = 150 mm x 100 mm) was created using the laminate laminated body. At this time, a straw-like tube made of polyethylene resin was used as an auxiliary member. When the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was favorable, there were few tears in a bag, and hand tearability was good. Further, in the drop test, out of 1,000 bags, eight bags were broken. Moreover, the adhesiveness of the point seal | sticker 209 part also in any bag was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Example 2
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 2. And when the standing pouch of the shape shown in FIG. 1 was created using the laminated laminated body, and the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer is very good, There were particularly few, and the hand cutability was good. Further, in the drop test, out of 1,000 bags, one bag was broken. Moreover, the adhesiveness of the point seal | sticker 209 part also in any bag was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 3]
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 3. And when the standing pouch of the shape shown in FIG. 1 was created using the laminated laminated body, and the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer is favorable and the broken bag is There were few and hand cutability was good. In the drop test, out of 1,000 bags, two bags were broken. Moreover, the adhesiveness of the point seal | sticker 209 part also in any bag was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Example 4
A standing pouch having the shape shown in FIG. 3 was produced using the laminate produced in the same manner as in Example 1. And when the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was favorable, there were few tearings, and hand cutability was good. Further, in the drop test, out of 1,000 bags, 9 bags were broken. Moreover, as for all the bags, hardening of hardening part 315a, 315b was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 5]
Using the laminate produced in the same manner as in Example 2, a standing pouch having the shape shown in FIG. 3 was produced. And when the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was very favorable, the tearing amount was particularly small, and the hand cutability was good. In the drop test, out of 1,000 bags, two bags were broken. Moreover, as for all the bags, hardening of hardening part 315a, 315b was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 6]
A standing laminate having the shape shown in FIG. 3 was produced using the laminate produced in the same manner as in Example 3. And when the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was favorable, there were few tearings, and hand cutability was good. In the drop test, out of 1,000 bags, 3 bags were broken. Moreover, as for all the bags, hardening of hardening part 315a, 315b was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 7]
Using the laminated laminate produced in the same manner as in Example 1, a standing pouch (spout fixing type) having a predetermined size (length × width = 150 mm × 100 mm) as shown in FIG. 5 was produced. At this time, a spout made of polyethylene resin was used as the spout 410 for extraction. When the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was favorable and there were few tears. In the drop test, out of 1,000 bags, 6 bags were broken. Moreover, the adhesiveness of the spout 410 for extraction also in any bag was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 8]
A standing pouch (spout fixing type) having a shape shown in FIG. 5 was prepared using the laminate as produced in the same manner as in Example 2, and the characteristics of the standing pouch were evaluated by the above-mentioned evaluation method. Interlaminar adhesion was very good and tearing was particularly low. In the drop test, out of 1,000 bags, two bags were broken. Moreover, the adhesiveness of the spout 410 for extraction also in any bag was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 9]
A standing pouch (spout fixing type) having a shape shown in FIG. 5 was prepared using the laminate as produced in the same manner as in Example 3, and the characteristics of the standing pouch were evaluated by the above-mentioned evaluation method. Interlaminar adhesion was very good and tearing was particularly low. In the drop test, out of 1,000 bags, 5 bags were broken. Moreover, the adhesiveness of the spout 410 for extraction also in any bag was favorable. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 10]
By laminating (laminating) the printed nylon base material layer and the sealant film 2 using a two-component mixed urethane adhesive, the following layer configuration (the deposited PET layer from the laminated laminate of Example 1 is obtained) A laminated laminate having the removed layer configuration) was produced.
· Nylon base layer / printing layer / adhesive layer / sealant film 2

  And when the standing pouch of the shape shown in FIG. 1 was created using the laminated laminated body, and the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer is very good, There were particularly few, and the hand cutability was good. Further, in the drop test, out of 1,000 bags, one bag was broken. Moreover, the adhesiveness of the point seal | sticker 209 part was favorable in all. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

[Example 11]
By laminating (printing) the printed PET base material layer, the aluminum barrier layer, and the sealant film 1, a laminate laminate having the following layer configuration was produced. In addition, the above-described two-component mixed urethane adhesive is used to bond the PET base layer and the aluminum barrier layer, and the heat-melted polyolefin is used to bond the aluminum barrier layer and the sealant film 1. Using.
· PET base layer / printing layer / adhesive layer / aluminum barrier layer / adhesive layer (hot-melt polyolefin) / sealant film 1

  Then, two laminates of the laminated laminate are laminated so that each other's sealant layer is on the inner side, and the left and right and upper and lower ends are heat sealed to obtain a predetermined size (length × width = 70 mm × 70 mm) A packaging bag (three-sided bag) was prepared (note that an unheat-sealed portion was provided as an opening at approximately the center of the upper end edge). And when the characteristic of the three-sided bag was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was favorable. Also, the mass productivity was good. The evaluation results of the properties of the three-sided bag are shown in Table 1 together with the properties of the three-sided bag.

[Example 12]
A laminate was produced in the same manner as in Example 11 except that the sealant film was changed to the sealant film 2. Then, using the laminated laminate, a three-sided bag having the same shape as that in Example 11 was prepared, and the characteristics of the three-sided bag were evaluated by the above-described evaluation method. Also, the mass productivity was good. The evaluation results of the properties of the three-sided bag are shown in Table 1 together with the properties of the three-sided bag.

[Example 13]
A laminate was produced in the same manner as in Example 11 except that the sealant film was changed to the sealant film 3. Then, using the laminated laminate, a three-sided bag having the same shape as that in Example 11 was prepared, and the characteristics of the three-sided bag were evaluated by the above-described evaluation method. Also, the mass productivity was good. The evaluation results of the properties of the three-sided bag are shown in Table 1 together with the properties of the three-sided bag.

Example 14
A laminated laminate having the following layer constitution was produced by laminating (printing) the printed PET base layer, the nylon base layer and the sealant film 2 using a two-component mixed urethane adhesive. .
· PET base layer / printing layer / adhesive layer / nylon base layer / adhesive layer / sealant film 2

  And the gusset bag which has the gusset in the right and left and the bottom was produced using the lamination layered product. And when the characteristic of the gusset bag was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was very favorable. Also, the mass productivity was good. The evaluation results of the properties of those gusset bags are shown in Table 1 together with the properties of the gusset bags.

[Example 15]
The following layer configuration is obtained by laminating (printing) a printed nylon base material layer, another nylon base material layer, an aluminum barrier layer, and the sealant film 2 using a two-component mixed urethane adhesive. A laminate laminate was produced.
· Nylon base layer / printing layer / adhesive layer / nylon base layer / adhesive layer / aluminum barrier layer / adhesive layer / sealant film 2

  And the cylindrical lamination tube which heat-sealed the upper and lower sides was created using the lamination laminated body (In addition, the un-heat-sealed part was provided in the approximate center of the upper end edge as an opening part). And when the characteristic of the lamination tube was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was very favorable, and mass productivity was also favorable. The evaluation results of the properties of those laminated tubes are shown in Table 1 together with the properties of the laminated tubes.

Comparative Example 1
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 4. Then, using the laminated laminate, a standing pouch having the shape shown in FIG. 1 was prepared, and when the characteristics of the standing pouch were evaluated by the above-described evaluation method, it was broken in 1,000 bags in the drop test. The bags had 20 broken bags and were not suitable for mass production. Also, the adhesion of the point seal 209 was poor. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Comparative Example 2
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 5. And when the standing pouch of the shape shown in FIG. 1 was created using the laminated laminated body, and the characteristic of the standing pouch was evaluated by the above-mentioned evaluation method, it was broken in 1,000 bags in the drop test. The bags had 17 broken bags and were not suitable for mass production. Also, the adhesion of the point seal 209 was poor. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Comparative Example 3
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 4. Then, using the laminated laminate, a standing pouch having the shape shown in FIG. 3 was prepared, and when the characteristics of the standing pouch were evaluated by the above-described evaluation method, it was broken in 1,000 bags in the drop test. There were 19 bags, and the mass production suitability was poor. In addition, the curing of the curing portions 315a and 315b was poor. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Comparative Example 4
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 5. Then, using the laminated laminate, a standing pouch having the shape shown in FIG. 3 was prepared, and when the characteristics of the standing pouch were evaluated by the above-described evaluation method, it was broken in 1,000 bags in the drop test. There were 18 bags, and the mass production suitability was poor. In addition, the curing of the curing portions 315a and 315b was poor. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Comparative Example 5
A laminate was produced in the same manner as in Example 1 except that the sealant film was changed to the sealant film 5. Then, a standing pouch (spout fixing type) having a shape shown in FIG. 5 was prepared using the laminated laminate, and the characteristics of the standing pouch were evaluated by the above-described evaluation method. Among them, 18 bags were torn, and the mass production suitability was poor. The evaluation results of the properties of those standing pouches are shown in Table 1 together with the properties of the standing pouches.

Comparative Example 6
A laminate was produced in the same manner as in Example 11 except that the sealant film was changed to the sealant film 4, and a three-sided bag was made. And when the characteristic of the three-sided bag was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was inadequate. The evaluation results of the properties of the three-sided bag are shown in Table 1 together with the properties of the three-sided bag.

Comparative Example 7
A laminate was produced in the same manner as in Example 11 except that the sealant film was changed to the sealant film 5, to prepare a three-sided bag. And when the characteristic of the three-sided bag was evaluated by the above-mentioned evaluation method, the interlayer adhesiveness of each layer was inadequate. The evaluation results of the properties of the three-sided bag are shown in Table 1 together with the properties of the three-sided bag.

  From Table 1, all of the standing pouches (provided with auxiliary members) manufactured in Examples 1 to 3 and 10 have interlayer adhesion and fall resistance (breaking when dropped with contents inserted) Bag property), hand cutability, and adhesion of the point seal portion are found to be good. In addition, all of the standing pouches (grooved rib installation type) manufactured in Examples 4 to 6 should have good interlayer adhesion, drop resistance, hand cutability, and the state of a cured portion (cured state). I understand. In addition, all of the standing pouches (spout type) manufactured in Examples 7 to 9 have good interlayer adhesion and drop resistance (resistance to break when dropped with the contents inserted). It is understood that Furthermore, it can be seen that the three-way bag manufactured in Examples 11 to 13, the gusset bag manufactured in Example 14, and the laminated tube manufactured in Example 15 all have good interlayer adhesion.

  On the other hand, in the standing pouches of the comparative examples 1 and 2 in which the sealant layer of the laminated laminate, which is the constituent material, is a single layer (type with auxiliary member), the fall resistance and adhesion of the point seal portion are poor. The standing pouch (grooved rib attachment type) of Comparative Examples 3 and 4 in which the sealant layer of the laminated laminate, which is the constituent material, is a single layer is poor in the drop resistance and the state of the cured portion, and the laminate that is the constituent material. It is understood that the standing pouch (spout type) of Comparative Example 5 in which the sealant layer of the laminate is a single layer is poor in the drop resistance. Moreover, it turns out that the three-way bag of Comparative Examples 6 and 7 in which the sealant layer of the laminate laminate which is the constituent material is a single layer has insufficient interlayer adhesion.

<Example of Modification of Laminated Laminate and Packaging Bag>
The configuration of the laminate according to the present invention is not limited to the aspect of each embodiment described above, and a base material layer, an adhesive layer, a sealant layer, a printing layer, a barrier layer (oxygen barrier layer, water vapor barrier layer And the like, the constituent materials such as the adhesive layer and the anchor coat layer, the thickness, the configuration of the lamination mode and the like can be appropriately changed as needed within the scope of the present invention. Further, the configuration of the packaging bag formed by using the laminate is not limited to the aspect of each embodiment described above, and the configuration of the size, shape, structure, etc. It can change suitably as needed in the range which does not deviate.

  For example, as in the above embodiment, the sealant film includes an inner sealant layer which is the inside of the packaging bag when forming the packaging bag, an intermediate sealant layer, and a substrate-side sealant layer which is a layer in contact with the substrate film. The laminated film is not limited to a laminated film having a three-layer structure formed by laminating in order, but may be changed to one having a laminated structure of four or more layers in which other sealant layers are laminated or interposed.

  In the case of forming a standing pouch provided with an auxiliary member as the packaging bag according to the present invention, the auxiliary member is partially thermally welded to one of the front and back body films by point sealing as in the above embodiment. It is also possible to change the auxiliary member to one partially heat-sealed to both front and back body films or the like.

  The laminate according to the present invention exhibits excellent effects as described above, and can be suitably used as a constituent material of a packaging bag. Moreover, the packaging bag formed of the said lamination laminate can be used suitably as a packaging bag for packaging and accommodating various substances, such as a foodstuff and a chemical product.

205 · · Packaging bag 310 · · Packaging bag 401 · · Packaging bag 250 · · Auxiliary member 313 · · Flow path (flow path for pouring)
314 · · Ribs 315a, 315b · · · Hardened part

Claims (10)

A laminate laminate for forming a packaging bag, comprising at least a substrate layer, an adhesive layer, and a sealant layer laminated in this order,
The base material layer contains at least one of a polyethylene terephthalate resin film, a polyamide resin film, a polyethylene naphthalate resin film, a polyacrylonitrile resin film, a polycarbonate resin film, and a polyimide resin film,
A laminate laminate for forming a packaging bag, wherein the sealant layer is a laminate of a plurality of layers.   The package according to claim 1, further comprising a print layer, a barrier layer, an adhesive layer, an anchor coat layer, and a surface coat layer, in addition to the base layer, the adhesive layer and the sealant layer. Laminated laminates for forming bags.   The laminate laminate for forming a packaging bag according to claim 1 or 2, wherein the sealant layer has a three-layer structure comprising an inner sealant layer, an intermediate sealant layer, and a substrate-side sealant layer. .   The laminate laminate for forming a packaging bag according to claim 3, wherein the resin component constituting the intermediate sealant layer contains 95% or more of a biomass-derived polyolefin.   The laminate laminate for forming a packaging bag according to claim 3 or 4, wherein the base-side sealant layer contains 95% or more of petroleum-derived polyolefin.   The composition according to any one of claims 3 to 5, wherein the inner sealant layer has either a composition containing 95% or more of petroleum-derived polyolefin or a composition containing 95% or more of biomass-derived polyolefin. Laminated laminate for forming a packaging bag.   A standing pouch comprising the laminate for forming a package according to any one of claims 1 to 6.   The standing pouch according to claim 7, further comprising an auxiliary member serving as a flow path when the stored contents are poured out. A pouring channel formed by heat sealing two laminated laminates stacked so that the sealant layer is on the inside at two separate places;
Groove-like ribs formed by bending the laminate so as to project outward along the extraction flow path;
The standing pouch according to claim 7, further comprising: a curing portion formed by curing the laminate body on at least one side of the rib. It is a packaging bag which consists of a laminate laminated body for the packaging bag formation in any one of Claims 1-6, Comprising:
A packaging bag characterized in that the packaging bag is any of a flat bag, a back-sticking bag, a gusset bag, and a tube.

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