WO2023026613A1 - ポリウレタン水性組成物、耐熱コート剤、第1積層体、袋、第2積層体、第1積層体の製造方法および第2積層体の製造方法 - Google Patents
ポリウレタン水性組成物、耐熱コート剤、第1積層体、袋、第2積層体、第1積層体の製造方法および第2積層体の製造方法 Download PDFInfo
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Images
Classifications
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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Definitions
- the present invention relates to an aqueous polyurethane composition, a heat-resistant coating agent, a first laminate, a bag, a second laminate, a method for producing the first laminate, and a method for producing the second laminate.
- both one side and the other side of the polyethylene laminated film are polyethylene films.
- one side and the other side of the polyethylene laminated film are substrates having the same melting point and are heat-sealed at the same temperature.
- the other side may also be heat-sealed.
- the present invention provides an aqueous polyurethane composition capable of suppressing heat-sealing of the other surface of a substrate layer when one surface of the substrate layer is heat-sealed, a heat-resistant coating agent containing the aqueous polyurethane composition, and an aqueous polyurethane composition thereof.
- a first laminate obtained by using, a bag made of the first laminate, a second laminate obtained by using the aqueous polyurethane composition, a method for producing the first laminate, and the second laminate It is to provide a manufacturing method of
- the present invention [1] comprises a polyurethane resin and inorganic particles, wherein the polyurethane resin is a polyol containing a polyisocyanate component containing a polyisocyanate having a ring structure, a macropolyol, and an active hydrogen group-containing compound containing a hydrophilic group.
- the content of the polyurethane resin is 5% by mass or more and 95% by mass or less with respect to the total amount of the polyurethane resin and the inorganic particles, and the content of the inorganic particles is 5% by mass.
- the aqueous polyurethane composition has a content of 95% by mass or more and an average particle size of the inorganic particles of 5 nm or more and 1000 nm or less.
- the present invention [2] is the aqueous polyurethane composition according to [1] above, wherein the active hydrogen group-containing compound containing a hydrophilic group is a compound having both a carboxy group and a hydroxyl group and/or an amino group. contains.
- the present invention includes the aqueous polyurethane composition according to [1] or [2] above, wherein the inorganic particles are colloidal inorganic particles.
- the present invention [4] is a heat-resistant coating agent comprising the aqueous polyurethane composition according to any one of [1] to [3] above.
- the present invention [5] comprises a heat-resistant layer, a polyolefin-based first film, an adhesive layer, and a polyolefin-based second film in this order toward one side in the thickness direction, and the heat-resistant layer comprises the above [1]. It contains a first laminate, which is a dried product of the aqueous polyurethane composition according to any one of [3].
- the present invention [6] includes the first laminate according to [5] above, wherein the heat-resistant layer has a mass per unit area of 0.1 g/m 2 or more and 3.3 g/m 2 or less. .
- the present invention [7] includes the first laminate according to [5] or [6] above, wherein the inorganic particles have an average particle size of 5 nm or more and 170 nm or less.
- the present invention [8] provides any one of the above [5] to [7], wherein the hardness of the heat-resistant layer measured under the following conditions is 0.35 N/mm 2 or more and 0.6 N/mm 2 or less. and a first laminate as described in Section 1 above. (conditions)
- the Martens hardness (HMs, N/mm 2 ) is measured on the surface of the heat-resistant layer with a coating amount of 1.5 g using an ultra-micro hardness tester. Also, in the measurement, the test force is 0.5 mN, the set depth is 1.0 ⁇ m, and the load speed is 3.0 mN/sec.
- the present invention [9] is the above [ 5] to [8], including the first laminate.
- the heat-resistant layer is directly disposed on the other side in the thickness direction of the first film, and the other side in the thickness direction of the first film is subjected to corona treatment, flame treatment, plasma treatment, and ultraviolet treatment. It includes the first laminate according to any one of [5] to [9] above, which is subjected to at least one surface treatment selected from the group consisting of treatments.
- the present invention [11] provides a , the first laminate according to any one of the above [5] to [10], comprising a gas barrier layer.
- the gas barrier layer is a reaction product of a polyisocyanate component containing xylylene diisocyanate and a polyol component containing a diol having 2 to 6 carbon atoms and an active hydrogen group-containing compound containing a hydrophilic group.
- the first laminate according to the above [11] which is a dried product of a polyurethane dispersion containing a polyurethane resin that is a reaction product of an isocyanate group-terminated prepolymer and a chain extender.
- the present invention is the first laminate according to [11] or [12] above, wherein the gas barrier layer has a mass per unit area of 0.8 g/m 2 or more and 3.5 g/m 2 or less. contains.
- the present invention [14] includes the first laminate according to any one of [5] to [13] above, wherein the first film and the second film are the same.
- the present invention [15] includes a bag comprising the first laminate according to any one of [5] to [14] above.
- the present invention [16] comprises a substrate layer and a heat-resistant layer in order toward one side in the thickness direction, and the heat-resistant layer comprises a dried polyurethane aqueous composition according to any one of [1] to [3]. and wherein the base layer is at least one selected from the group consisting of polyolefin films, polyester films, and nylon films.
- the absolute value of the difference between the Martens hardness on one side in the thickness direction of the heat-resistant layer and the Martens hardness on the other side in the thickness direction of the base layer is 0.25 or more and 0.80 or less.
- the present invention [18] comprises a first step of preparing a polyolefin-based first film, and the polyurethane of any one of the above [1] to [3] on the other side in the thickness direction of the polyolefin-based first film.
- a second step of arranging a heat-resistant layer by applying and drying an aqueous composition a third step of arranging an adhesive layer on one side in the thickness direction of the polyolefin-based first film, and the adhesion layer.
- the present invention [19] comprises a fifth step of preparing a substrate layer, and applying the aqueous polyurethane composition according to any one of the above [1] to [3] to one surface of the substrate layer in the thickness direction. and a sixth step of arranging a heat-resistant layer by drying, and in the fifth step, one surface in the thickness direction of the base material layer is subjected to corona treatment, flame treatment, plasma treatment, and ultraviolet treatment from the group consisting of.
- a method for manufacturing a second laminate is included, which applies at least one selected surface treatment.
- the blending ratio of the polyurethane resin and the blending ratio of the inorganic particles to the total amount of the polyurethane resin and the inorganic particles are within a predetermined range. Therefore, when one side of the base material layer is heat-sealed, heat sealing of the other side of the base material layer can be suppressed.
- the heat-resistant coating agent of the present invention contains the aqueous polyurethane composition of the present invention. Therefore, when one side of the base material layer is heat-sealed, heat sealing of the other side of the base material layer can be suppressed.
- the heat-resistant layer is provided on the other side in the thickness direction of the first film, heat-sealing of the first film can be suppressed when the second film is heat-sealed.
- the bag of the present invention is made of the first laminate of the present invention, heat sealing of the first film can be suppressed when heat sealing the second film.
- the heat-resistant layer is provided on one side in the thickness direction of the base layer, heat sealing of one side of the base layer is suppressed when the other side of the base layer is heat-sealed. can.
- the heat-resistant layer is arranged by applying the water-based polyurethane composition of the present invention to the other side in the thickness direction of the polyolefin-based first film and drying it. Therefore, the first laminate can be manufactured favorably.
- the heat-resistant layer is arranged by applying the water-based polyurethane composition of the present invention to one surface in the thickness direction of the base material layer and drying it. Therefore, the second laminate can be manufactured favorably.
- FIG. 1 shows a schematic diagram of one embodiment of the first laminate of the present invention.
- 2A to 2D are schematic diagrams showing one embodiment of a method for manufacturing the first laminate.
- FIG. 2A shows the first step of preparing a polyolefin-based first film.
- FIG. 2B shows the second step of arranging (laminating) a heat-resistant layer by applying an aqueous polyurethane composition to the other side in the thickness direction of the polyolefin-based first film and drying it.
- FIG. 2C shows a third step of arranging (laminating) an adhesive layer on one side in the thickness direction of the polyolefin-based first film.
- FIG. 1 shows a schematic diagram of one embodiment of the first laminate of the present invention.
- FIG. 2A to 2D are schematic diagrams showing one embodiment of a method for manufacturing the first laminate.
- FIG. 2A shows the first step of preparing a polyolefin-based first film.
- FIG. 2B shows the second step of
- FIG. 2D shows a fourth step of disposing (laminating) a polyolefin-based second film on one side in the thickness direction of the adhesive layer.
- FIG. 3 shows a schematic diagram of one embodiment of the second laminate of the present invention.
- 4A and 4B are schematic diagrams illustrating an embodiment of a method for manufacturing the second laminate.
- FIG. 4A shows the fifth step of preparing the substrate layer.
- FIG. 4B shows a sixth step of disposing a heat-resistant layer by applying an aqueous polyurethane composition to one surface in the thickness direction of the base material layer and drying it.
- 5A to 5C are schematic diagrams showing one embodiment of the method for manufacturing the bag (standing pouch) of the present invention.
- FIG. 5A shows a step of preparing a sheet-like laminate.
- FIG. 5B shows a step of bringing the opposing polyolefin-based second films into contact with each other and heat-sealing them.
- Figure 5C shows the process of obtaining a standing pouch.
- FIG. 6 is a schematic diagram showing a modification of the laminate of the present invention.
- FIG. 6A shows a laminate with a gas barrier layer between a polyolefin-based first film and an adhesive layer.
- FIG. 6B shows a laminate with a gas barrier layer between the heat resistant layer and the polyolefin-based first film.
- FIG. 6C shows a laminate with a gas barrier layer between the adhesive layer and the polyolefin-based second film.
- a numerical range represented using “ ⁇ ” means a range including the numerical values described before and after " ⁇ " as lower and upper limits.
- film is a concept that includes not only what is generally called “film” but also what is generally called “sheet”.
- the polyurethane aqueous composition comprises a polyurethane resin and inorganic particles.
- the polyurethane resin includes a reaction product of a first polyisocyanate component as the polyisocyanate component and a first polyol component as the polyol component.
- the first polyisocyanate component preferably contains a polyisocyanate having a ring structure.
- polyisocyanates having a ring structure examples include polyisocyanate monomers having a ring structure and polyisocyanate derivatives having a ring structure.
- Polyisocyanate monomers having a ring structure include, for example, alicyclic polyisocyanates, aromatic polyisocyanates, and araliphatic polyisocyanates.
- Alicyclic polyisocyanates include, for example, alicyclic diisocyanates.
- Alicyclic diisocyanates include, for example, 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate (isophorone diisocyanate, IPDI), 4,4′-, 2,4′- or 2,2′-methylenebis ( cyclohexyl isocyanate) or mixtures thereof (H 12 MDI), 1,3- or 1,4-bis(isocyanatomethyl)cyclohexane or mixtures thereof (H 6 XDI), bis(isocyanatomethyl)norbornane (NBDI), 1, 3-cyclopentene diisocyanate, 1,4-cyclohexane diisocyanate, 1,3-cyclohexane diisocyanate, methyl-2,4-cyclohexane diisocyanate and methyl-2,6-cyclohexane diisocyanate, preferably 4,4′-
- aromatic polyisocyanates include aromatic diisocyanates.
- Aromatic diisocyanates include, for example, 4,4'-, 2,4'- or 2,2'-diphenylmethane diisocyanate or mixtures thereof (MDI), 2,4- or 2,6-tolylene diisocyanate or mixtures thereof ( TDI), 4,4'-toluidine diisocyanate (TODI), 1,5-naphthalene diisocyanate (NDI), m- or p-phenylene diisocyanate or mixtures thereof, 4,4'-diphenyl diisocyanate, and 4,4'- Diphenyl ether diisocyanate may be mentioned.
- MDI 4,4'-, 2,4'- or 2,2'-diphenylmethane diisocyanate or mixtures thereof
- TDI 2,4- or 2,6-tolylene diisocyanate or mixtures thereof
- TODI 4,4'-toluidine diisocyanate
- araliphatic polyisocyanates examples include araliphatic diisocyanates.
- araliphatic diisocyanates include 1,3- or 1,4-bis(isocyanatomethyl)benzene (also known as 1,3- or 1,4-xylylene diisocyanate) or mixtures thereof (XDI), 1, 3- or 1,4-tetramethylxylylene diisocyanate or mixtures thereof (TMXDI) and ⁇ , ⁇ '-diisocyanate-1,4-diethylbenzene.
- the polyisocyanate derivative having a ring structure is a derivative of the above-mentioned polyisocyanate monomer having a ring structure, for example, multimers of polyisocyanate monomers having a ring structure (e.g., dimers, trimers, (e.g., isocyanurate modified, iminooxadiazinedione modified), pentamer, heptamer, etc.), allophanate modified (e.g., polyisocyanate monomer having a ring structure described above, monohydric alcohol or Allophanate modified product produced by reaction with dihydric alcohol), polyol modified product (e.g., polyisocyanate monomer having a ring structure described above and trihydric alcohol (e.g., trimethylolpropane, etc.) produced by reaction Polyol modified product (alcohol adduct), etc.), biuret modified product (for example, polyisocyanate monomer having a ring structure described above, biuret modified
- the polyisocyanate having a ring structure preferably includes a polyisocyanate monomer having a ring structure, more preferably an alicyclic polyisocyanate.
- the polyisocyanate having a ring structure can be used alone or in combination of two or more.
- the first polyisocyanate component can also contain a polyisocyanate that does not have a ring structure.
- polyisocyanates having no ring structure examples include polyisocyanate monomers having no ring structure and polyisocyanate derivatives having no ring structure.
- polyisocyanate monomers having no ring structure examples include aliphatic polyisocyanates.
- aliphatic polyisocyanates include aliphatic diisocyanates.
- aliphatic diisocyanates include ethylene diisocyanate, trimethylene diisocyanate, 1,2-propylene diisocyanate, butylene diisocyanate (tetramethylene diisocyanate, 1,2-butylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate).
- PDI 1,5-pentamethylene diisocyanate
- HDI 1,6-hexamethylene diisocyanate
- 2,4,4- or 2,2,4-trimethylhexamethylene diisocyanate 2,6-diisocyanatomethylcapate
- dodecamethylene diisocyanate dodecamethylene diisocyanate
- the polyisocyanate derivative having no ring structure is the above derivative of the polyisocyanate monomer having no ring structure.
- Polyisocyanates having no ring structure can be used alone or in combination of two or more.
- the mixing ratio of the polyisocyanate having no ring structure is, for example, 10 parts by mass or less, preferably 5 parts by mass or less per 100 parts by mass of the first polyisocyanate component.
- the polyisocyanate preferably does not contain polyisocyanates without ring structures, and contains only polyisocyanates with ring structures.
- the first polyol component preferably contains a macropolyol and an active hydrogen group-containing compound containing a hydrophilic group.
- a macropolyol is a compound having two or more hydroxyl groups at the molecular ends and a number average molecular weight of 400 or more, preferably 500 or more, and 10,000 or less, preferably 5,000 or less, more preferably 3,000 or less.
- the average number of functional groups of the macropolyol is, for example, 2 or more and, for example, 3 or less, and preferably 2.
- macropolyols examples include polyether polyols, polyester polyols, polycarbonate polyols, polyurethane polyols, epoxy polyols, polyolefin polyols, acrylic polyols, silicone polyols, fluorine polyols, and vinyl monomer-modified polyols, preferably polyester polyols, and polycarbonate polyols, more preferably polyester polyols.
- polyester polyols examples include polycondensates of low-molecular-weight polyols described below and polybasic acids.
- low-molecular-weight polyols include preferably dihydric alcohols, more preferably diols having 2 to 6 carbon atoms, still more preferably alkanediols, and particularly preferably 1,6-hexanediol and neopentyl glycol.
- polybasic acids examples include aromatic dibasic acids, alicyclic dibasic acids, and aliphatic dibasic acids.
- aromatic dibasic acids include aromatic carboxylic acids.
- aromatic carboxylic acids include phthalic acid (orthophthalic acid, isophthalic acid, terephthalic acid) and trimellitic acid, preferably phthalic acid, more preferably isophthalic acid.
- Alicyclic dibasic acids include, for example, alicyclic carboxylic acids.
- Alicyclic carboxylic acids include, for example, hett acid and 1,2-hexahydrophthalic acid.
- aliphatic dibasic acids include aliphatic carboxylic acids.
- aliphatic carboxylic acids include oxalic acid, malonic acid, succinic acid, methylsuccinic acid, 2,2-dimethylsuccinic acid, 2,3-dimethylsuccinic acid, hexylsuccinic acid, glutaric acid, 2-methylglutaric acid, 3-methylglutaric acid, 2,2-dimethylglutaric acid, 3,3-dimethylsuccinic acid, adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid, preferably adipic acid and Sebacic acid may be mentioned.
- Polybasic acids preferably include aliphatic dibasic acids and aromatic dibasic acids.
- polyester polyols preferably include a polycondensate of 1,6-hexanediol, neopentyl glycol and adipic acid, and a polycondensate of isophthalic acid, sebacic acid, ethylene glycol and neopentyl glycol. Condensates are mentioned.
- polyester polyols include polyester polyols obtained by ring-opening polymerization of ⁇ -caprolactone and the like.
- polyester polyol In addition, commercial products can be used as the polyester polyol. Specifically, Takelac U-5620 (polycondensate of adipic acid, 1,6-hexanediol, and neopentyl glycol, polyester polyol, manufactured by Mitsui Chemicals, Inc.), Takelac U-9025 (isophthalic acid, Polyester polyol, which is a polycondensate of sebacic acid, ethylene glycol, and neopentyl glycol, manufactured by Mitsui Chemicals, Inc.).
- Polycarbonate polyols include, for example, a ring-opening polymer (crystalline polycarbonate polyol) of ethylene carbonate using a low-molecular-weight polyol (preferably a dihydric alcohol) as an initiator, such as a dihydric alcohol having 4 to 6 carbon atoms. and an amorphous polycarbonate polyol obtained by copolymerizing a ring-opening polymer.
- a plant-derived polycarbonate polyol derived from a plant-derived raw material such as isosorbide can also be used.
- polycarbonate polyol A commercially available product can be used as the polycarbonate polyol. Specific examples include Duranol T-6002 (polycarbonate diol, manufactured by Asahi Kasei Corporation).
- the macropolyol can be used alone or in combination of two or more.
- the blending ratio of the macropolyol is, for example, 60 parts by mass or more, preferably 70 parts by mass or more, for example, 96 parts by mass or less, preferably 90 parts by mass or less, with respect to the total amount of 100 parts by mass of the first polyol component. More preferably, it is 80 parts by mass or less.
- a hydrophilic group-containing active hydrogen group-containing compound is a compound that contains a hydrophilic group and two or more active hydrogen groups.
- an active hydrogen group a hydroxyl group and an amino group are mentioned, for example.
- hydrophilic groups include nonionic groups and ionic groups. More specific examples of active hydrogen group-containing compounds containing hydrophilic groups include active hydrogen group-containing compounds containing nonionic groups and active hydrogen group-containing compounds containing ionic groups.
- a nonionic group-containing active hydrogen group-containing compound is a compound that has one or more nonionic groups and two or more active hydrogen groups.
- Nonionic groups include, for example, polyoxyethylene groups.
- Active hydrogen group-containing compounds containing nonionic groups include, for example, polyoxyethylene glycols, one-end-blocked polyoxyethylene glycols, and polyols containing polyoxyethylene side chains.
- active hydrogen group-containing compounds containing ionic groups examples include active hydrogen group-containing compounds containing anionic groups and active hydrogen group-containing compounds containing cationic groups.
- An active hydrogen group-containing compound containing an anionic group is a compound having one or more anionic groups and two or more active hydrogen groups.
- the anionic group include a carboxy group (carboxylic acid group) and a sulfo group (sulfonic acid group), preferably a carboxy group.
- the active hydrogen group includes, for example, a hydroxyl group and an amino group.
- Active hydrogen group-containing compounds containing an anionic group preferably include compounds having both a carboxy group and a hydroxyl group and/or an amino group.
- the active hydrogen group-containing compound containing an anionic group is more preferably an organic compound having both a carboxy group and two hydroxyl groups.
- Examples of organic compounds having both a carboxy group and two hydroxyl groups include carboxy group-containing polyols.
- Carboxy group-containing polyols include, for example, polyhydroxyalkanoic acids.
- Examples of polyhydroxyalkanoic acids include 2,2-dimethylolacetic acid, 2,2-dimethylollactic acid, 2,2-dimethylolpropionic acid (also known as dimethylolpropionic acid), 2,2-dimethylolbutanoic acid, 2 ,2-dimethylolbutyric acid and 2,2-dimethylolvaleric acid, preferably 2,2-dimethylolpropionic acid.
- a cationic group-containing active hydrogen group-containing compound is a compound having both one or more cationic groups and two or more active hydrogen groups.
- Cationic groups include, for example, tertiary amino groups (tertiary amines capable of forming tertiary ammonium salts).
- the active hydrogen group includes, for example, a hydroxyl group and an amino group, preferably a hydroxyl group. That is, the active hydrogen group-containing compound containing a cationic group preferably includes an organic compound having both a tertiary amino group and two hydroxyl groups.
- Examples of organic compounds having both a tertiary amino group and two hydroxyl groups include N-alkyldialkanolamines.
- Examples of N-alkyldialkanolamine include N-methyldiethanolamine, N-propyldiethanolamine, N-butyldiethanolamine and N-methyldipropanolamine, preferably N-methyldiethanolamine.
- the active hydrogen group-containing compound containing a hydrophilic group preferably includes an active hydrogen group-containing compound containing an ionic group, more preferably an active hydrogen group-containing compound containing an anionic group. .
- the active hydrogen group-containing compound containing a hydrophilic group can be used alone or in combination of two or more.
- the compounding ratio of the active hydrogen group-containing compound containing a hydrophilic group is, for example, 1 part by mass or more, preferably 5 parts by mass or more, more preferably 10 parts by mass with respect to 100 parts by mass of the total amount of the first polyol component. parts or more, for example, 30 parts by mass or less, preferably 20 parts by mass or less.
- the first polyol component can also contain a low-molecular-weight polyol (a low-molecular-weight polyol excluding active hydrogen group-containing compounds containing hydrophilic groups).
- a low-molecular-weight polyol a low-molecular-weight polyol excluding active hydrogen group-containing compounds containing hydrophilic groups.
- low-molecular-weight polyols examples include diols having 2 to 6 carbon atoms and other low-molecular-weight polyols (excluding diols having 2 to 6 carbon atoms).
- the diol having 2 to 6 carbon atoms is a compound having a number average molecular weight of 40 or more and less than 400, preferably 300 or less, and having two hydroxyl groups and having 2 to 6 carbon atoms. (alkylene glycol having 2 to 6 carbon atoms), ether diol having 2 to 6 carbon atoms, and alkenediol having 2 to 6 carbon atoms.
- alkanediols having 2 to 6 carbon atoms examples include ethylene glycol, propylene glycol (1,2- or 1,3-propanediol or a mixture thereof), butylene glycol (1,2- or 1,3- or 1, 4-butanediol or mixtures thereof), 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, and 1,3- or 1,4-cyclohexane diols.
- ether diols having 2 to 6 carbon atoms examples include diethylene glycol, triethylene glycol, and dipropylene glycol, preferably triethylene glycol.
- alkenediol having 2 to 6 carbon atoms examples include 1,4-dihydroxy-2-butene.
- the diol having 2 to 6 carbon atoms preferably includes an ether diol having 2 to 6 carbon atoms.
- diols having 2 to 6 carbon atoms can be used alone or in combination of two or more.
- the mixing ratio of the diol having 2 to 6 carbon atoms is, for example, 1 part by mass or more, preferably 5 parts by mass or more, more preferably 10 parts by mass or more, relative to 100 parts by mass of the total amount of the first polyol component. , 30 parts by mass or less, preferably 20 parts by mass or less.
- low-molecular-weight polyols are compounds having a number average molecular weight of 40 or more and less than 400, preferably 300 or less, and having two or more hydroxyl groups in one molecule. ), and trivalent or higher low-molecular-weight polyols.
- the diol (dihydric alcohol) having 7 or more carbon atoms is a compound having a number average molecular weight of 40 or more and less than 400, preferably 300 or less, and having two hydroxyl groups in one molecule and having 7 or more carbon atoms.
- diols (dihydric alcohols) having 7 or more carbon atoms also include divalent polyalkylene oxides having a number average molecular weight of less than 400, preferably 300 or less.
- Such polyalkylene oxides can be obtained, for example, by addition reaction of alkylene oxides such as ethylene oxide and/or propylene oxide using the above-mentioned dihydric alcohol as an initiator, polyethylene glycol (polyoxyethylene ether glycol), polypropylene glycol (polyoxypropylene ether glycol), polyethylene polypropylene glycol (random or block copolymer), and the like.
- Further examples include polytetramethylene ether glycol having a number average molecular weight of less than 400, preferably 300 or less obtained by ring-opening polymerization of tetrahydrofuran.
- a trihydric or higher low molecular weight polyol is a compound having a number average molecular weight of 40 or more and less than 400, preferably 300 or less, and having 3 or more hydroxyl groups in one molecule, for example, a trihydric alcohol (low molecular weight triol).
- a trihydric alcohol lower molecular weight triol
- tetrahydric alcohols pentahydric alcohols, hexahydric alcohols, heptahydric alcohols, and octahydric alcohols.
- trihydric alcohols include glycerin, 2-methyl-2-hydroxymethyl-1,3-propanediol, 2,4-dihydroxy-3-hydroxymethylpentane, 1,2,6-hexanetriol, and trimethylolpropane.
- Tetrahydric alcohols include, for example, tetramethylolmethane (pentaerythritol) and diglycerin. Examples of pentahydric alcohols include xylitol. Hexavalent alcohols include, for example, sorbitol, mannitol, allitol, iditol, dulcitol, altritol, inositol, and dipentaerythritol. Heptahydric alcohols include, for example, perseitol. Examples of octahydric alcohols include sucrose.
- trivalent or higher low molecular weight polyols also include trivalent or higher polyalkylene oxides having a number average molecular weight of 40 or more and less than 400, preferably 300 or less.
- a polyalkylene oxide can be obtained, for example, by subjecting an alkylene oxide such as ethylene oxide and/or propylene oxide to an addition reaction using the above-described trivalent or higher low-molecular-weight polyol or a known polyamine as an initiator, resulting in polyethylene polyol , polypropylene polyol, polyethylene polypropylene polyol (random or block copolymer), and the like.
- low-molecular-weight polyols can be used alone or in combination of two or more.
- the first polyol component is preferably a macro polyol, a hydrophilic group-containing active hydrogen group-containing compound. It includes a group-containing compound and a low-molecular-weight polyol, and more preferably consists of a macropolyol, an active hydrogen-group-containing compound containing a hydrophilic group, and a low-molecular-weight polyol.
- the first polyol component preferably contains a macropolyol and a hydrophilic group. It contains an active hydrogen group-containing compound, and more preferably consists of a macropolyol and an active hydrogen group-containing compound containing a hydrophilic group.
- each of the above components is reacted by a known polymerization method such as bulk polymerization or solution polymerization, preferably solution polymerization, which facilitates adjustment of reactivity and viscosity. react.
- a known polymerization method such as bulk polymerization or solution polymerization, preferably solution polymerization, which facilitates adjustment of reactivity and viscosity. react.
- the equivalent ratio of the isocyanate groups in the first polyisocyanate component to the active hydrogen groups (hydroxyl groups and/or amino groups) in the first polyol component (isocyanate groups/hydroxyl groups ) is greater than 1, for example 1.2 or more, preferably 1.3 or more, for example 3.0 or less, preferably 2.5 or less.
- the terminal functional groups of the resulting reaction product in such cases are isocyanate groups. That is, an isocyanate group-terminated prepolymer is obtained.
- the equivalent ratio is, for example, 0.9 or more and, for example, 1.1 or less.
- the terminal functional group of the reaction product obtained in such cases is an isocyanate group or a hydroxyl group.
- solution polymerization for example, the above components are mixed in an organic solvent (solvent) under a nitrogen atmosphere and reacted.
- the reaction temperature is, for example, 20° C. or higher and, for example, 80° C. or lower
- the reaction time is, for example, 1 hour or longer and, for example, 20 hours or shorter.
- organic solvents examples include acetone, methyl ethyl ketone, ethyl acetate, tetrahydrofuran, acetonitrile, and N-methylpyrrolidone, which are inert to isocyanate groups and highly hydrophilic.
- reaction catalysts eg, amine-based, tin-based, and lead-based
- reaction catalysts eg, amine-based, tin-based, and lead-based
- the unreacted first polyisocyanate component and/or the unreacted first polyol component can be removed by known methods such as distillation and extraction.
- the reaction product is obtained as a reaction liquid containing the reaction product and the organic solvent.
- reaction product when the reaction product contains an ionic group, it is preferably neutralized by adding a neutralizing agent to form a salt of the ionic group.
- the neutralizing agent when the ionic group is an anionic group, a commonly used base (eg, triethylamine) is employed. Also, when the ionic group is a cationic group, a conventional acid (eg, acetic acid) is employed.
- a commonly used base eg, triethylamine
- a conventional acid eg, acetic acid
- the neutralizing agent is added at a ratio of 0.4 equivalents or more, preferably 0.6 equivalents or more, per 1 equivalent of the anionic group (or 1 equivalent of the cationic group). Preferably, it is added in a proportion of 1 equivalent or less.
- the neutralizing agent can be used alone or in combination of two or more.
- reaction product can be chain-extended with a chain extender.
- a chain extender when an anionic group-containing active hydrogen group-containing compound is used as the hydrophilic group-containing active hydrogen group-containing compound, the chain is preferably elongated.
- a cationic group-containing active hydrogen group-containing compound is used as the hydrophilic group-containing active hydrogen group-containing compound, the above reaction product (without chain extension reaction product) is used as is.
- reaction product When the reaction product is chain-extended with a chain extender, the reaction product is a prepolymer. Then, in order to chain extend the reaction product (prepolymer) with a chain extender, the reaction product (prepolymer) and the chain extender are reacted, for example, in water to form a polyurethane resin (polyurethane dispersion). obtain.
- chain extenders include the above-described low-molecular-weight polyols and amino group-containing compounds.
- amino group-containing compounds include aromatic polyamines, araliphatic polyamines, alicyclic polyamines, aliphatic polyamines, amino alcohols, polyoxyethylene group-containing polyamines, primary amino groups, or primary amino groups. and amino group-containing compounds such as alkoxysilyl compounds having a secondary amino group and hydrazine or derivatives thereof.
- aromatic polyamines examples include 4,4'-diphenylmethanediamine and tolylenediamine.
- the araliphatic polyamines include, for example, 1,3- or 1,4-xylylenediamine or mixtures thereof.
- alicyclic polyamines examples include 3-aminomethyl-3,5,5-trimethylcyclohexylamine (also known as isophoronediamine), 4,4′-dicyclohexylmethanediamine, 2,5(2,6)-bis( aminomethyl)bicyclo[2.2.1]heptane, 1,4-cyclohexanediamine, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, bis-(4-aminocyclohexyl)methane, diaminocyclohexane , 3,9-bis(3-aminopropyl)-2,4,8,10-tetraoxaspiro[5,5]undecane, 1,3- and 1,4-bis(aminomethyl)cyclohexane and mixtures thereof is mentioned.
- aliphatic polyamines examples include ethylenediamine, propylenediamine, 1,3-propanediamine, 1,4-butanediamine, 1,5-pentanediamine, 1,6-hexamethylenediamine, diethylenetriamine, triethylenetetramine, and tetraethylene. Pentamine, 1,2-diaminoethane, 1,2-diaminopropane, and 1,3-diaminopentane, preferably ethylenediamine.
- amino alcohols examples include 2-((2-aminoethyl)amino)ethanol (also known as N-(2-aminoethyl)ethanolamine) and 2-((2-aminoethyl)amino)-1- Methylpropanol (alias: N-(2-aminoethyl) isopropanolamine), preferably 2-((2-aminoethyl) amino) ethanol (alias: N-(2-aminoethyl) ethanolamine) mentioned.
- 2-((2-aminoethyl)amino)ethanol also known as N-(2-aminoethyl)ethanolamine
- 2-((2-aminoethyl)amino)-1- Methylpropanol alias: N-(2-aminoethyl) isopropanolamine
- 2-((2-aminoethyl) amino) ethanol alias: N-(2-aminoethyl)
- polyoxyethylene group-containing polyamines examples include polyoxyalkylene ether diamines such as polyoxyethylene ether diamine. More specifically, for example, PEG #1000 diamine manufactured by NOF, Jeffamine ED-2003, EDR-148, XTJ-512 manufactured by Huntsman, and the like can be mentioned.
- alkoxysilyl compound having a primary amino group, or a primary amino group and a secondary amino group examples include an alkoxysilyl compound having a primary amino group, and a primary amino group and a secondary alkoxysilyl compounds having a secondary amino group.
- Alkoxysilyl compounds with primary amino groups include, for example, ⁇ -aminopropyltrimethoxysilane, ⁇ -aminopropyltriethoxysilane, and N-phenyl- ⁇ -aminopropyltrimethoxysilane.
- alkoxysilyl compounds having a primary amino group and a secondary amino group examples include N- ⁇ (aminoethyl) ⁇ -aminopropyltrimethoxysilane (also known as N-2-(aminoethyl)-3-amino propyltrimethoxysilane), N- ⁇ (aminoethyl) ⁇ -aminopropyltriethoxysilane (alias: N-2-(aminoethyl)-3-aminopropyltriethoxysilane), N- ⁇ (aminoethyl) ⁇ - Aminopropylmethyldimethoxysilane (alias: N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane) and N- ⁇ (aminoethyl) ⁇ -aminopropylmethyldiethoxysilane (alias: N-2- (aminoethyl)-3-aminoprop
- the alkoxysilyl compound having a primary amino group, or a primary amino group and a secondary amino group preferably an alkoxysilyl compound having a primary amino group and a secondary amino group, more preferably N- ⁇ (aminoethyl) ⁇ -aminopropyltrimethoxysilane (also known as N-2-(aminoethyl)-3-aminopropyltrimethoxysilane) can be mentioned.
- hydrazine or its derivatives examples include hydrazine (including hydrates), succinic dihydrazide, and adipic dihydrazide.
- Chain extenders preferably include amino group-containing compounds, more preferably aliphatic polyamines, amino alcohols, alkoxysilyl compounds having a primary amino group or a primary amino group and a secondary amino group. mentioned.
- the chain extender can be used alone or in combination of two or more.
- Preferable examples include the combined use of an aminoalcohol and an alkoxysilyl compound having a primary amino group or a primary amino group and a secondary amino group, and the single use of an aliphatic polyamine.
- reaction product (prepolymer) with the chain extender in water
- the reaction product (prepolymer) is After dispersion, a chain extender is added thereto and the reaction product (prepolymer) is chain extended by the chain extender.
- reaction product prepolymer
- the reaction product (prepolymer) is stirred at a ratio of 50 to 1000 parts by mass of water with respect to 100 parts by mass of the reaction product (prepolymer). is added.
- the chain extender is added to the water in which the reaction product (prepolymer) is dispersed in water, while stirring, the active hydrogen groups (amino groups and hydroxyl groups) of the chain extender with respect to the isocyanate groups of the reaction product (prepolymer). Add dropwise so that the equivalent ratio (active hydrogen group/isocyanate group) is, for example, 0.6 to 1.2.
- the chain extender can be added dropwise, for example, as an aqueous solution, and after the dropwise addition is completed, the reaction is completed at room temperature, for example, while further stirring.
- the reaction time until completion of the reaction is, for example, 0.1 hours or more and, for example, 10 hours or less.
- reaction product prepolymer
- a chain extender is added thereto to obtain the reaction product ( prepolymer) can also be chain-extended with a chain extender.
- the organic solvent and water can be removed as necessary, and water can be added to adjust the solid content concentration.
- reaction product (prepolymer) is chain-extended by the chain extender.
- chain extender This gives a polyurethane resin prepared as an aqueous dispersion (polyurethane dispersion).
- the pH of the polyurethane dispersion is, for example, 6 or higher, preferably 7 or higher, and for example, 10 or lower, preferably 9 or lower.
- the viscosity of the polyurethane dispersion at 25°C is, for example, 20 mPa ⁇ s or more, preferably 30 mPa ⁇ s or more, and for example, 100 mPa ⁇ s or less, preferably 50 mPa ⁇ s or less.
- the average particle size of the polyurethane dispersion is, for example, 20 nm or more, preferably 30 nm or more, and, for example, 50 nm or less.
- reaction generation is preferably performed without chain elongation.
- the product (reaction product without chain extension) is used as is.
- a polyurethane resin prepared as an aqueous dispersion (polyurethane dispersion) is obtained by dispersing the reaction product (the reaction product that does not undergo chain extension) in water.
- the pH of the polyurethane dispersion is, for example, 4 or higher, preferably 5 or higher, and for example, 8 or lower, preferably 7 or lower.
- the viscosity of the polyurethane dispersion at 25° C. is, for example, 5 mPa ⁇ s or more, preferably 10 mPa ⁇ s or more, and for example, 80 mPa ⁇ s or less, preferably 50 mPa ⁇ s or less, more preferably 30 mPa ⁇ s or less. s or less.
- the average particle size of the polyurethane dispersion is 40 nm or more, preferably 50 nm or more, and, for example, 70 nm or less.
- the solid content concentration of the polyurethane dispersion is, for example, 10% by mass or more, preferably 20% by mass or more, and for example, 50% by mass or less, preferably 40% by mass or less.
- the inorganic particles are blended to improve the heat resistance of the heat-resistant layer (described later).
- inorganic particles include metal oxide particles and carbonate particles.
- Metal oxide particles include silica particles, titanium oxide particles, and aluminum oxide particles.
- Carbonate particles include, for example, calcium carbonate particles and magnesium carbonate particles.
- colloidal inorganic particles for example, colloidal metal oxide particles
- colloidal silica particles colloidal silica
- colloidal aluminum oxide particles alumina sol
- the inorganic particles are preferably metal oxide particles, more preferably silica particles, aluminum oxide particles, still more preferably colloidal silica particles (colloidal silica), colloidal aluminum oxide particles (alumina sol), particularly preferably and colloidal silica from the viewpoint of further improving the heat resistance of the heat-resistant layer (described later).
- the average particle diameter of the inorganic particles is 5 nm or more, preferably 7 nm or more, more preferably 10 nm or more, from the viewpoint of dispersibility in the polyurethane dispersion. 1000 nm or less, preferably 170 nm or less, more preferably 100 nm or less, more preferably 70 nm or less, particularly preferably 50 nm or less, most preferably 30 nm or less from the viewpoint of storage stability of the aqueous polyurethane composition described below. is.
- the average particle size can be measured using a concentrated particle size analyzer FPAR-1000 (manufactured by Otsuka Electronics Co., Ltd.).
- the aqueous polyurethane composition is obtained by mixing a polyurethane resin (aqueous dispersion of polyurethane resin) and inorganic particles.
- the blending ratio of the polyurethane resin (solid content) is 5% by mass or more and 95% by mass or less, preferably 80% by mass or less, more preferably 80% by mass or less, based on the total amount of the polyurethane resin (solid content) and the inorganic particles. , 65% by mass or less, more preferably 45% by mass or less.
- the blending ratio of the inorganic particles is 5% by mass or more, preferably 20% by mass or more, based on the total amount of the polyurethane resin (solid content) and the inorganic particles, and the later-described laminate (first laminate and second laminate ), and from the viewpoint of suppressing blocking when winding the laminate (first laminate and second laminate), it is more preferably 35% by mass or more, more preferably 55% by mass or more, Moreover, it is 95 mass % or less.
- the heat resistance of the heat-resistant layer (described later) can be further improved. As a result, when one surface of the substrate layer (described later) is heat-sealed, heat sealing of the other surface of the substrate layer (described later) can be suppressed.
- a water-soluble organic solvent and a wetting agent for example, a modified polysiloxane copolymer may be added. can be added.
- water-soluble organic solvents examples include alcohols and ketones.
- Alcohols include, for example, methanol, ethanol, and 2-propanol.
- Ketones include, for example, acetone and methyl ethyl ketone.
- the water-soluble organic solvent can be used alone or in combination of two or more.
- additives can be added to the aqueous polyurethane composition as necessary.
- additives include stabilizers (e.g., antioxidants, heat stabilizers, ultraviolet absorbers), plasticizers, antistatic agents, lubricants, antiblocking agents, surfactants, dispersion stabilizers, colorants (e.g., , pigments, dyes), and crystal nucleating agents.
- the mixing ratio of the additive is not particularly limited, and is set appropriately according to the purpose and application.
- the heat resistant coating agent contains the aqueous polyurethane composition. Therefore, when one surface of the substrate layer (described later) is heat-sealed, heat sealing of the other surface of the substrate layer (described later) can be suppressed.
- the vertical direction on the paper surface is the vertical direction (thickness direction).
- the upper side of the paper is the upper side (one side in the thickness direction).
- the lower side of the paper is the lower side (the other side in the thickness direction).
- the left-right direction and the depth direction on the paper surface are plane directions orthogonal to the up-down direction. Specifically, it conforms to the directional arrows in each figure.
- the first laminate 1 includes a heat-resistant layer 2, a first polyolefin film 3, an adhesive layer 4, and a second polyolefin film 5 in order toward one side in the thickness direction.
- the first laminate 1 includes a heat-resistant layer 2, a polyolefin-based first film 3 directly disposed on the upper surface (one side in the thickness direction) of the heat-resistant layer 2, and a polyolefin-based first film 3. It comprises an adhesive layer 4 directly arranged on the upper surface (one surface in the thickness direction) and a polyolefin-based second film 5 directly arranged on the upper surface (one surface in the thickness direction) of the adhesive layer 4 .
- the thickness of the first laminate 1 is, for example, 45 ⁇ m or more, preferably 60 ⁇ m or more, and for example, 150 ⁇ m or less, preferably 120 ⁇ m or less.
- the heat-resistant layer 2 has a sheet shape extending along the plane direction (direction perpendicular to the thickness direction) and having a flat front surface and a flat back surface.
- the heat-resistant layer 2 suppresses heat-sealing of the first polyolefin-based film 3 when heat-sealing the second polyolefin-based film 5 .
- the heat-resistant layer 2 is a dried polyurethane aqueous composition.
- the heat-resistant layer 2 is obtained by coating and drying an aqueous polyurethane composition on the other side in the thickness direction of the polyolefin-based first film 3 .
- the mass per unit area of the heat-resistant layer 2 is, for example, 0.1 g/m 2 or more from the viewpoint of improving the appearance of the heat-resistant layer 2, and 0.2 g/m 2 or more from the viewpoint of further improving the appearance of the heat-resistant layer 2.
- 2 or more preferably 0.4 g/m 2 or more, and for example, 3.7 g/m 2 or less, preferably 3.3 g/m 2 or less from the viewpoint of further improving the appearance of the heat-resistant layer 2
- the hardness (Martens hardness) of the heat-resistant layer 2 is, for example, 0.35 N/mm from the viewpoint of suppressing blocking when manufacturing the first laminate 1 described later and winding the first laminate 1. 2 or more, preferably 0.4 N/mm 2 or more, and for example, from the viewpoint of slipperiness of the surface of the first laminate 1, 0.6 N/mm 2 or less, preferably 0.5 N/mm 2 or less is.
- the Martens hardness of the heat-resistant layer 2 is obtained by measuring the Martens hardness (HMs, N/mm 2 ) on the surface of the heat-resistant layer with a coating amount of 1.5 g using an ultra-micro hardness tester. Also, in the measurement, the test force is 0.5 mN, the set depth is 1.0 ⁇ m, and the load speed is 3.0 mN/sec.
- the polyolefin-based first film 3 has a sheet shape extending along the surface direction (direction orthogonal to the thickness direction) and having a flat front surface and a flat back surface.
- the polyolefin-based first film 3 contains, as its material, at least one selected from the group consisting of, for example, polyethylene, polypropylene, ethylene-based copolymers, and propylene-based copolymers.
- Films made of polyethylene include, for example, low-density polyethylene film (LDPE) and linear low-density polyethylene film (LLDPE).
- LDPE low-density polyethylene film
- LLDPE linear low-density polyethylene film
- films made of polypropylene include oriented polypropylene films (CPP films), monoaxially oriented polypropylene films, and biaxially oriented polypropylene films (OPP films).
- films made from ethylene-based copolymers include ethylene/ ⁇ -olefin copolymer films.
- the ⁇ -olefin is an ⁇ -olefin having 3 or more carbon atoms, specifically propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl -1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene and 1-eicosene.
- films made from propylene-based copolymers include propylene/ ⁇ -olefin copolymer films.
- the ⁇ -olefin is an ⁇ -olefin having 4 or more carbon atoms, specifically 1-butene, 1-pentene, 1-hexene, 4-methyl-1 -pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene and 1-eicosene.
- the material is selected from one selected from the group consisting of polyethylene, polypropylene, ethylene-based copolymers, and propylene-based copolymers, more preferably polyethylene or polypropylene.
- the polyolefin-based first film 3 may be anchor-coated with an anchor-coating agent (for example, a mixture of trimethylolpropane-modified xylylene diisocyanate and ethyl acetate).
- an anchor-coating agent for example, a mixture of trimethylolpropane-modified xylylene diisocyanate and ethyl acetate.
- the thickness of the polyolefin-based first film 3 is, for example, 10 ⁇ m or more, preferably 20 ⁇ m or more, from the viewpoint of ease of handling. It is 150 ⁇ m or less, preferably 100 ⁇ m or less.
- the adhesive layer 4 has a sheet shape extending in the surface direction (direction perpendicular to the thickness direction) and having a flat front surface and a flat rear surface.
- the adhesive layer 4 bonds the first polyolefin film 3 and the second polyolefin film 5 .
- the adhesive layer 4 is made of, for example, an adhesive.
- the adhesive is not particularly limited, and includes, for example, a known two-component curing urethane adhesive.
- the adhesive commercially available products can be used, such as a mixture of Takelac A-969V (manufactured by Mitsui Chemicals) and Tanecate A-5 (manufactured by Mitsui Chemicals).
- the adhesive layer 4 is obtained by applying an adhesive to one surface in the thickness direction of the polyolefin-based first film 3 and drying it.
- the mass per unit area of the adhesive layer 4 is, for example, 1.0 g/m 2 or more, preferably 2.0 g/m 2 or more, and for example, 5.0 g/m 2 or less, preferably 4.0 g. /m 2 or less.
- the polyolefin-based second film 5 has a sheet shape extending along the surface direction (direction perpendicular to the thickness direction) and having a flat front surface and a flat back surface.
- Examples of the polyolefin-based second film 5 include those similar to the polyolefin-based first film 3 described above.
- the polyolefin-based first film 3 and the polyolefin-based second film 5 are both the same.
- polyolefin-based first film 3 and the polyolefin-based second film 5 are both low-density polyethylene films (LDPE) or linear low-density polyethylene films (LLDPE).
- LDPE low-density polyethylene films
- LLDPE linear low-density polyethylene films
- both are biaxially oriented polypropylene films (OPP films), or both are unoriented polypropylene films (CPP films).
- polyolefin-based second film 5 may be anchor-coated with the above-described anchor-coating agent.
- the thickness of the polyolefin-based second film 5 is, for example, 10 ⁇ m or more, preferably 20 ⁇ m or more, from the viewpoint of ease of handling, and from the viewpoint of improving the heat-sealing property of the first laminate 1, for example, It is 150 ⁇ m or less, preferably 100 ⁇ m or less.
- the method for producing the first laminate 1 comprises a first step of preparing a polyolefin first film 3, and applying an aqueous polyurethane composition to the other surface of the polyolefin first film 3 in the thickness direction, followed by drying.
- a second step of arranging (laminating) the heat-resistant layer 2 a third step of arranging (laminating) the adhesive layer 4 on one side of the polyolefin-based first film 3 in the thickness direction, and a thickness direction of the adhesive layer 4.
- the heat-resistant layer 2 is arranged (laminated) by applying an aqueous polyurethane composition to the other side in the thickness direction of the polyolefin-based first film 3 and drying it.
- the other side in the thickness direction of the first polyolefin film 3 is preferably surface-treated.
- Examples of surface treatments include corona treatment, flame treatment, plasma treatment and ultraviolet treatment. That is, preferably, the other surface in the thickness direction of the polyolefin first film 3 is subjected to at least one surface treatment selected from the group consisting of corona treatment, flame treatment, plasma treatment and ultraviolet treatment.
- the wettability of the polyolefin-based first film 3 can be improved.
- an aqueous polyurethane composition is applied to the entire surface of the other side in the thickness direction of the polyolefin-based first film 3 and dried.
- a known coating method for example, bar coder method, curtain coating method, roll coating method, and blade coating method.
- the drying temperature is, for example, 40°C or higher, preferably 50°C or higher, and, for example, 80°C or lower.
- the drying time is, for example, 10 seconds or more, preferably 20 seconds or more, and, for example, 120 seconds or less.
- the heat-resistant layer 2 is arranged (laminated) on the other side in the thickness direction of the polyolefin-based first film 3 .
- an adhesive layer 4 is arranged (laminated) on one side in the thickness direction of the polyolefin-based first film 3 .
- an adhesive is applied to one side in the thickness direction of the first polyolefin film 3 and dried.
- the coating method is the same as the coating method for the heat-resistant layer 2 described above.
- the drying temperature is, for example, 30°C or higher and, for example, 80°C or lower.
- the drying time is, for example, 1 minute or more and, for example, 5 minutes or less.
- the adhesive layer 4 is arranged (laminated) on one side in the thickness direction of the polyolefin-based first film 3 .
- a polyolefin-based second film 5 is placed (laminated) on one side of the adhesive layer 4 in the thickness direction.
- the aging temperature is, for example, 20°C or higher and, for example, 50°C or lower. Also, the aging time is, for example, one day or more and, for example, four days or less.
- the first polyolefin film 3 and the second polyolefin film 5 are adhered via the adhesive layer 4, and the first laminate 1 is obtained.
- the second laminate 20 includes a base material layer 21 and a heat insulating layer 2 in order toward one side in the thickness direction.
- the second laminate 20 includes a base layer 21 and a heat insulating layer 2 directly disposed on the upper surface (one side in the thickness direction) of the base layer 21 .
- the thickness of the second laminate 20 is, for example, 45 ⁇ m or more, preferably 60 ⁇ m or more, and for example, 150 ⁇ m or less, preferably 120 ⁇ m or less.
- the base material layer 21 includes the polyolefin second film 5, the adhesive layer 4, and the polyolefin first film 3 in order toward the thickness direction side.
- the second laminate 20 includes the polyolefin-based second film 5, the adhesive layer 4, the polyolefin-based first film 3, and the heat insulating layer 2 in order toward one side in the thickness direction.
- the method for manufacturing the second laminate 20 includes a fifth step of preparing the base material layer 21, and applying an aqueous polyurethane composition to one surface of the base material layer 21 in the thickness direction, followed by drying to form the heat-resistant layer 2. and a sixth step of arranging.
- a base material layer 21 is prepared. Specifically, the adhesive layer 4 and the polyolefin-based second film 5 are arranged in this order on the other side in the thickness direction of the polyolefin-based first film 3 based on the same procedure as the above-described third and fourth steps. do.
- the heat-resistant layer 2 is arranged by applying an aqueous polyurethane composition to one surface of the substrate layer 21 in the thickness direction and drying it. Specifically, the heat insulating layer 2 is arranged on one surface in the thickness direction of the substrate layer 21 (polyolefin-based first film 3) based on the same procedure as in the second step.
- the blending ratio of the polyurethane resin and the blending ratio of the inorganic particles with respect to the total amount of the polyurethane resin and the inorganic particles are within predetermined ranges. Therefore, when one surface of the base material layer 21 is heat-sealed, heat sealing of the other surface of the base material layer 21 can be suppressed. More specifically, in the first laminate 1, when the polyolefin second film 5 is heat sealed, heat sealing of the polyolefin first film 3 can be suppressed.
- the heat-resistant coating agent contains an aqueous polyurethane composition. Therefore, when one side of the base material layer 20 is heat-sealed, heat sealing of the other side of the base material layer 20 can be suppressed.
- the heat-resistant layer 2 is provided on the other side in the thickness direction of the polyolefin-based first film 3, when the polyolefin-based second film 5 is heat-sealed, the polyolefin-based first film 3 of heat sealing can be suppressed.
- the heat-resistant layer 2 is provided on one side in the thickness direction of the base layer 20, when the other side of the base layer 21 is heat-sealed, the one side of the base layer 21 is heat-sealed. can be suppressed.
- the heat-resistant layer 2 is arranged by applying the water-based polyurethane composition to the other side in the thickness direction of the polyolefin-based first film 3 and drying it. Therefore, the 1st laminated body 1 can be manufactured suitably.
- the heat-resistant layer 2 is arranged by applying the aqueous polyurethane composition to one surface of the base material layer 21 in the thickness direction and drying it. Therefore, the 1st laminated body 1 can be manufactured suitably.
- Such first laminate 1 and second laminate 20 can be suitably used, for example, as packaging materials for various industrial products such as sweets, foods, daily necessities, medicines, and papers.
- such a first laminate 1 can be suitably used for manufacturing a standing pouch as an example of the bag of the present invention.
- ⁇ Standing pouch> One embodiment of a method for manufacturing a standing pouch is described with reference to FIGS. 5A-5C.
- the standing pouch 10 is a self-supporting packaging bag that can contain contents.
- a sheet-like laminate 1 is prepared as shown in FIG. 5A.
- the laminate 1 is folded into a substantially W shape so that the polyolefin-based second films 5 in the laminate 1 face each other.
- the opposing polyolefin-based second films 5 in the laminate 1 are brought into contact with each other.
- the opposing second polyolefin film 5 side becomes the inside (contents side) of the standing pouch 10
- the heat-resistant layer 2 side becomes the outside of the standing pouch 10 .
- the portion bent into a substantially W shape becomes the bottom portion 11 of the standing pouch 10, and the opposite side becomes the mouth portion 12 for inserting (or taking out) the contents.
- the polyolefin-based second films 5 are in contact with each other inside the standing pouch 10 , and the heat-resistant layers 2 are in contact with each other outside the standing pouch 10 .
- the inside of the standing pouch 10 (the contacting polyolefin-based second film 5 and the bottom portion 11 (see the dot portion in FIG. 5B) is heat-sealed.
- the heat-resistant layers 2 come into contact with each other between the first polyolefin films 3, so the first polyolefin films 3 are not heat-sealed. Therefore, as shown in FIG. 5C, the polyolefin-based first films 3 can be separated from each other at the bottom portion 11 to allow the standing pouch 10 to stand on its own.
- the laminate 1 can also have a gas barrier layer 6 .
- a gas barrier layer 6 Specifically, between the polyolefin-based first film 3 and the adhesive layer 4 (see FIG. 6A), or between the heat-resistant layer 2 and the polyolefin-based first film 3 (see FIG. 6B), or adhesion A gas barrier layer 6 can also be provided between the layer 4 and the polyolefin-based second film 5 (see FIG. 6C).
- the laminate 1 can include a plurality of gas barrier layers 6 .
- the laminate 1 is formed between the polyolefin-based first film 3 and the adhesive layer 4 and/or between the heat-resistant layer 2 and the polyolefin-based first film 3 and/or between the adhesive layer 4 and a polyolefin-based second film 5, a gas barrier layer 6 is provided.
- the laminate 1 is provided with the gas barrier layer 6, it has excellent gas barrier properties.
- the laminate 1 (see FIG. 6A) provided with the gas barrier layer 6 between the polyolefin-based first film 3 and the adhesive layer 4 will be described.
- Such a laminate 1 includes a heat-resistant layer 2, a polyolefin-based first film 3, a gas barrier layer 6, an adhesive layer 4, and a polyolefin-based second film 5 in order toward one side in the thickness direction. .
- the gas barrier layer 6 has a sheet shape extending in the surface direction (direction orthogonal to the thickness direction) and having a flat front surface and a flat rear surface.
- the gas barrier layer 6 provides the laminate 1 with gas barrier properties.
- the gas barrier layer 6 comprises a polyisocyanate component containing xylylene diisocyanate (hereinafter referred to as a second polyisocyanate component) and a polyol component containing a diol having 2 to 6 carbon atoms and an active hydrogen group-containing compound containing a hydrophilic group. (hereinafter referred to as a second polyol component) and an isocyanate group-terminated prepolymer that is a reaction product with a chain extender, and a dried polyurethane resin that is a reaction product.
- a polyisocyanate component containing xylylene diisocyanate hereinafter referred to as a second polyisocyanate component
- a polyol component containing a diol having 2 to 6 carbon atoms and an active hydrogen group-containing compound containing a hydrophilic group hereinafter referred to as a second polyol component
- an isocyanate group-terminated prepolymer that is a reaction product
- the second polyisocyanate component contains xylylene diisocyanate as an essential component.
- Xylylene diisocyanate includes 1,2-xylylene diisocyanate (o-XDI), 1,3-xylylene diisocyanate (m-XDI), and 1,4-xylylene diisocyanate (p-XDI) as structural isomers. mentioned.
- the xylylene diisocyanate preferably includes 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate, and more preferably 1,3-xylylene diisocyanate.
- the xylylene diisocyanate includes the above derivatives.
- the xylylene diisocyanate can be used alone or in combination of two or more.
- the second polyisocyanate component can contain other polyisocyanates as optional components.
- polyisocyanates include the above-described alicyclic polyisocyanates, the above-described aromatic polyisocyanates, the above-described araliphatic polyisocyanates (excluding xylylene diisocyanate), the above-described aliphatic polyisocyanates, and the above-described derivatives thereof. etc., preferably alicyclic polyisocyanate, more preferably 4,4′-methylenebis(cyclohexyl isocyanate).
- the mixing ratio of the other polyisocyanate is, for example, 10 parts by mass or more and, for example, 30 parts by mass or less with respect to 100 parts by mass of the second polyisocyanate component.
- the second polyisocyanate component preferably contains xylylene diisocyanate and alicyclic polyisocyanate, more preferably xylylene diisocyanate and 4,4′-methylenebis(cyclohexyl isocyanate), still more preferably xylylene diisocyanate and 4,4'-methylenebis(cyclohexyl isocyanate).
- the second polyol component contains, as essential components, the above-described C2-C6 diol and the above-described active hydrogen group-containing compound containing a hydrophilic group.
- the diol having 2 to 6 carbon atoms preferably includes an alkanediol having 2 to 6 carbon atoms, more preferably ethylene glycol.
- diols having 2 to 6 carbon atoms can be used alone or in combination of two or more.
- the mixing ratio of the diol having 2 to 6 carbon atoms is, for example, 50 parts by mass or more and, for example, 80 parts by mass or less, preferably 70 parts by mass or less, with respect to 100 parts by mass of the total amount of the second polyol component. .
- Examples of the active hydrogen group-containing compound containing a hydrophilic group include the active hydrogen group-containing compounds described above, preferably an active hydrogen group-containing compound containing an ionic group, more preferably an anionic group and two or more and a hydroxyl group, more preferably a carboxy group-containing polyol, particularly preferably a polyhydroxyalkanoic acid, most preferably 2,2-dimethylolpropionic acid.
- the compounding ratio of the active hydrogen group-containing compound containing a hydrophilic group is, for example, 10 parts by mass or more, preferably 20 parts by mass or more, more preferably 30 parts by mass with respect to 100 parts by mass of the total amount of the second polyol component. parts or more and, for example, 50 parts by mass or less.
- the second polyol component includes, as optional components, the above-described diol having 7 or more carbon atoms (dihydric alcohol) and the above-described low-molecular-weight polyol having a valence of 3 or more.
- trivalent or higher low-molecular-weight polyols include the above-described low-molecular-weight polyols, preferably trihydric alcohols, and more preferably trimethylolpropane.
- the blending ratio of the trivalent or higher low-molecular-weight polyol is, for example, 1 part by mass or more, for example, 20 parts by mass or less, preferably 10 parts by mass or less with respect to 100 parts by mass as the total amount of the second polyol component.
- the second polyol component preferably contains a diol having 2 to 6 carbon atoms, an active hydrogen group-containing compound containing a hydrophilic group and a trivalent or higher low molecular weight polyol, more preferably a diol having 2 to 6 carbon atoms. , an active hydrogen group-containing compound containing a hydrophilic group and a trivalent or higher low-molecular-weight polyol.
- the isocyanate group-terminated prepolymer is obtained by reacting the second polyisocyanate component and the second polyol component.
- the above components are reacted in the same manner as the reaction of the first polyisocyanate component and the first polyol component.
- the same organic solvent (solvent) and reaction catalyst as in the reaction between the first polyisocyanate component and the first polyol component can be used, and the reaction conditions (reaction temperature, reaction time and equivalent ratio) is similar to the reaction between the first polyisocyanate component and the first polyol component.
- an isocyanate group-terminated prepolymer which is a reaction product of the second polyisocyanate component and the second polyol component, is obtained.
- the isocyanate group-terminated prepolymer is used as an isocyanate group-terminated prepolymer reaction solution containing the isocyanate group-terminated prepolymer and an organic solvent. can get.
- the isocyanate group-terminated prepolymer contains an ionic group
- it is preferably neutralized by adding the above-described neutralizing agent in the same manner as the above-described isocyanate group-terminated first prepolymer, Salts of ionic groups are formed.
- the isocyanate group-terminated prepolymer thus obtained is a polyurethane prepolymer having at least one (preferably a plurality, more preferably two) free isocyanate groups at its molecular terminal, and the isocyanate Group content (isocyanate group content in terms of solid content excluding solvent) is, for example, 0.3% by mass or more, preferably 1.0% by mass or more, and, for example, 20% by mass or less, preferably is 15% by mass or less.
- the average number of functional groups of the isocyanate group is, for example, 1.5 or more, and is, for example, 3.0 or less, preferably 2.5 or less.
- the isocyanate group-terminated prepolymer obtained as described above and the chain extender described above are reacted, for example, in water to form an aqueous dispersion of the polyurethane resin (referred to as an aqueous dispersion of the second polyurethane resin). may be obtained.).
- chain extenders include the chain extenders described above, preferably amino group-containing compounds, more preferably amino alcohols, still more preferably 2-((2-aminoethyl) amino) ethanol ( Also known as: N-(2-aminoethyl)ethanolamine).
- the solid content concentration of the aqueous dispersion of the second polyurethane resin is, for example, 10% by mass or more, preferably 15% by mass or more, more preferably 20% by mass or more, and for example, 60% by mass or less, preferably 50% by mass or less, more preferably 45% by mass or less.
- additives can be added to the aqueous dispersion of the second polyurethane resin, if necessary.
- the mixing ratio of the additive is not particularly limited, and is appropriately set according to the purpose and application.
- the aqueous dispersion of the second polyurethane resin may be blended with a thermoplastic resin having gas barrier properties as long as the gas barrier properties are not impaired.
- thermoplastic resins with gas barrier properties examples include polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyvinylidene chloride or vinylidene chloride copolymer, and polysaccharides such as starch and cellulose.
- water-soluble organic solvent described above and the wetting agent described above can be added to the aqueous dispersion of the second polyurethane resin.
- the gas barrier layer 6 is obtained by applying an aqueous dispersion of the second polyurethane resin to one surface in the thickness direction of the polyolefin-based first film 3 and drying it.
- the mass per unit area of the gas barrier layer 6 is, for example, 0.8 g/m 2 or more, preferably 1.0 g/m 2 or more. From the viewpoint of suppressing blocking when manufacturing and winding the laminate 1, it is 5.0 g/m 2 or less, preferably 3.5 g/m 2 or less.
- the method for producing the laminate 1 includes a first step of preparing a polyolefin first film 3 and a second step of disposing (laminating) a heat-resistant layer 2 on the other side of the polyolefin first film 3 in the thickness direction. a fifth step of disposing (laminating) the gas barrier layer 6 on one side in the thickness direction of the polyolefin-based first film 3; and a fourth step of arranging (laminating) a polyolefin-based second film 5 on one surface of the adhesive layer 4 in the thickness direction.
- the first step and the second step are carried out in the same procedure as in the above embodiment.
- the gas barrier layer 6 is arranged (laminated) on one side in the thickness direction of the polyolefin-based first film 3 .
- one side in the thickness direction of the first polyolefin film 3 is preferably coated with the anchor coating agent described above. Then apply anchor coat.
- the anchor coating agent is applied such that the mass per unit area of the anchor coating agent is, for example, 0.1 g/m 2 or more and, for example, 1.0 g/m 2 or less.
- the coating method is the same as the coating method for the heat-resistant layer 2 described above.
- the drying temperature is, for example, 30°C or higher and, for example, 80°C or lower
- the drying time is, for example, 1 minute or longer and, for example, 5 minutes or shorter.
- one surface in the thickness direction of the polyolefin first film 3 may be subjected to the above-described surface treatment (preferably, corona treatment).
- an aqueous dispersion of the second polyurethane resin is applied to one surface in the thickness direction of the polyolefin-based first film 3 and dried.
- the coating method is the same as the coating method for the heat-resistant layer 2 described above.
- the drying temperature is, for example, 30°C or higher and, for example, 80°C or lower.
- the drying time is, for example, 10 seconds or more, preferably 20 seconds or more, and, for example, 120 seconds or less.
- the gas barrier layer 6 is arranged (laminated) on one side in the thickness direction of the polyolefin-based first film 3 .
- the third and fourth steps are performed in the same procedure as in the above embodiment.
- the laminate 1 having the gas barrier layer 6 between the polyolefin-based first film 3 and the adhesive layer 4 is obtained.
- the laminate 1 provided with the gas barrier layer 6 between the polyolefin first film 3 and the adhesive layer 4 has been described above.
- the laminate 1 (see FIG. 6B) and the laminate 1 (see FIG. 6C) including the gas barrier layer 6 between the adhesive layer 4 and the polyolefin-based second film 5 are also manufactured in the same procedure as above. can.
- the laminate 1 provided with the gas barrier layer 6 between the heat-resistant layer 2 and the polyolefin first film 3 is produced in the first step, the fifth step, the second step, the third step, and the fourth step. It is obtained by carrying out in order.
- the laminate 1 provided with the gas barrier layer 6 between the adhesive layer 4 and the polyolefin-based second film 5 is produced in the order of the first step, the second step, the third step, the fifth step, and the fourth step. It is obtained by implementing in
- the base layer 21 includes the polyolefin-based second film 5, the adhesive layer 4, and the polyolefin-based first film 3 in this order toward the thickness direction side.
- the base layer 21 can also consist of a third film.
- the second laminate 20 includes the third film and the heat-resistant layer 2 in order toward one side in the thickness direction.
- the third film is, for example, at least one selected from the group consisting of polyolefin films, polyester films, and nylon films.
- the absolute value of the difference between the Martens hardness on one side in the thickness direction of the heat-resistant layer 2 and the Martens hardness on the other side in the thickness direction of the base material layer 21 is, for example, sticking during heat sealing. is preferably 0.25 or more from the viewpoint of suppressing , and there is no particular upper limit, but for example, from the viewpoint of suppressing curling during expansion due to changes in heat and humidity, 0.80 or less is preferable.
- the Martens hardness (HMs) of the base material layer 21 can be measured based on the following conditions.
- such a second laminate 20 includes the heat insulating layer 2 on one side in the thickness direction of the base layer 21 (third film), when the other side of the base layer 21 is heat-sealed, the base material Heat sealing of one surface of the layer 21 can be suppressed.
- A-EA 2-((2-aminoethyl) amino) ethanol
- EDA ethylenediamine
- IPA 2-propanoltakenate
- D-110N trimethylolpropane of xylylene diisocyanate ( TMP) adduct, isocyanate group content 11.5% by mass, solid content 75% by mass
- solvent ethyl acetate, manufactured by Mitsui Chemicals
- TM-50 colloidal silica, average particle size 22 nm, solid content concentration 50% by mass
- GRACE HS-30 colloidal silica, average particle size 12 nm, solid content concentration 30% by mass
- GRACE A2 alumina sol, average particles Diameter 66 nm, solid content concentration 13.9% by mass, Kawaken Fine Chemicals Co., Ltd.
- F1000 alumina sol, average particle diameter 169 nm, solid content 7.5% by mass, Kawaken Fine Chemicals Co., Ltd.
- LLDPE linear low-density polyethylene film
- film thickness 30 ⁇ m LDPE low density polyethylene film
- OPP biaxially oriented polypropylene film
- CPP unstretched polypropylene film
- Synthesis Example 2 to Synthesis Example 5 Based on the same procedure as in Synthesis Example 1, an aqueous dispersion of polyurethane resin (polyurethane dispersion) was obtained. However, based on Table 1, the formulation was changed. Moreover, in Synthesis Example 4, no chain elongation was performed. Specifically, 970 parts by mass of water cooled to 15° C. to 25° C. was added to the reaction solution after adding the neutralizing agent (acetic acid) and the organic solvent (acetonitrile) without adding the chain extender. . Stir to emulsify.
- the neutralizing agent acetic acid
- organic solvent acetonitrile
- Corona treatment was performed on the other side in the thickness direction of the first film. After the treatment, the surface wetting tension of the other surface in the thickness direction of the first film was 41 dyn or more.
- the aqueous polyurethane composition of Preparation Example 1 was applied to the other side of the first film in the thickness direction by a bar coder method and dried at 60° C. for 30 seconds. As a result, a heat-resistant layer was arranged (laminated) on the other side in the thickness direction of the first film.
- Adhesives for dry lamination (Takelac A-969V (manufactured by Mitsui Chemicals, Inc.) and Takenate A-5 (manufactured by Mitsui Chemicals, Inc.) are applied to one side in the thickness direction of the first film so that the dry thickness becomes 3 g / m 2 , It was applied by a bar coder method and then dried with a drier, thereby disposing (laminating) an adhesive layer on one side in the thickness direction of the first film.
- Examples 2 to 23 and Comparative Examples 1 to 8 A laminate was obtained based on the same procedure as in Example 1. However, the formulation was changed based on Tables 3 to 5. In Comparative Examples 5 to 8, the second step was not performed (no heat-resistant layer was provided). In addition, in Comparative Example 4, the inorganic particles (colloidal silica) fell off from the heat-resistant layer, and the heat-resistant layer could not be formed.
- Example 24 [First step] LLDPE was prepared as the first film.
- Corona treatment was performed on the other side in the thickness direction of the first film. After the treatment, the surface wetting tension of the other surface in the thickness direction of the first film was 41 dyn or more.
- the aqueous polyurethane composition of Preparation Example 3 was applied to the other side in the thickness direction of the first film by a bar coder method and dried at 60°C for 30 seconds. As a result, a heat-resistant layer was arranged (laminated) on the other side in the thickness direction of the first film.
- An anchor coating agent (2.6 g of Takenate D-110N and 97.4 g of ethyl acetate) was applied to one surface in the thickness direction of the first film so that the mass per unit area of the anchor coating was 0.2 g/m 2 . was treated with an anchor coat.
- the aqueous polyurethane composition of Preparation Example 18 was applied to one surface of the first film in the thickness direction by a bar coder method and dried at 60°C for 30 seconds.
- the gas barrier layer was arranged (laminated) on one side in the thickness direction of the first film.
- Dry laminate adhesives (Takelac A-969V (manufactured by Mitsui Chemicals) and Takenate A-5 (manufactured by Mitsui Chemicals) were applied to one side of the gas barrier layer in the thickness direction so that the dry thickness was 3 g/m 2 . and then dried with a drier, thereby disposing (laminating) an adhesive layer on one side in the thickness direction of the gas barrier layer.
- Examples 25 and 26 A laminate was obtained based on the same procedure as in Example 24. However, based on Table 4, the prescription was changed. Further, in the fifth step, corona treatment (surface wetting tension of one surface in the thickness direction of the first film is 50 dyn or more) was performed instead of the anchor coating treatment.
- ⁇ Appearance of heat-resistant layer> The appearance of the surface of the heat-resistant layer of each example and each comparative example was visually observed and evaluated based on the following criteria. ⁇ : Neither repelling, unevenness nor cloudiness was observed. ⁇ : Slight cloudiness was observed. ⁇ : Fine spot-like repellence was observed. x: Any one or more of cissing, unevenness, and cloudiness was observed.
- Heat-resistant layers of the heat-resistant layers of each example and each comparative example were brought into contact with each other, and heat-sealed using a TP-701-B-HEAT SEAL TESTER manufactured by Tester Sangyo Co., Ltd. under the conditions of 120 ° C., 0.2 MPa, and 1 second. bottom. At this time, in order to prevent sticking to the heat seal bar, heat sealing was performed via a PET film.
- FT-IR measurement was performed on the heat-resistant layer after peeling to examine the remaining state of the heat-resistant layer.
- the remaining state of the heat-resistant layer was evaluated based on the following criteria. ⁇ : FT-IR measurement showed that the heat-resistant layer remained. ⁇ : From FT-IR measurement, it was found that a heat-resistant layer remained, but the peak intensity ratio was different. x: It was found from the FT-IR measurement that the heat-resistant layer did not remain.
- OTR oxygen transmission rate
- aqueous polyurethane composition, heat-resistant coating agent, first laminate, bag, second laminate, method for producing the first laminate, and method for producing the second laminate of the present invention are suitable, for example, in the field of packaging materials. can be used for
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Abstract
Description
(条件)
塗布量1.5gの耐熱層表面に対し、超微小硬度計を用いてマルテンス硬さ(HMs、N/mm2)を測定する。また、測定において、試験力を0.5mNとし、設定深さを1.0μmとし、負荷速度を3.0mN/秒とする。
ポリウレタン水性組成物は、ポリウレタン樹脂および無機粒子を含む。
ポリウレタン樹脂は、ポリイソシアネート成分としての第1ポリイソシアネート成分、および、ポリオール成分としての第1ポリオール成分の反応生成物を含む。
そのようなポリアルキレンオキサイドは、例えば、上記した3価以上の低分子量ポリオール、または、公知のポリアミンを開始剤として、エチレンオキサイドおよび/またはプロピレンオキサイドなどのアルキレンオキサイドを付加反応させることによって、ポリエチレンポリオール、ポリプロピレンポリオール、ポリエチレンポリプロピレンポリオール(ランダムまたはブロック共重合体)などとして得ることができる。
第1級アミノ基を有するアルコキシシリル化合物としては、例えば、γ-アミノプロピルトリメトキシシラン、γ-アミノプロピルトリエトキシシラン、および、N-フェニル-γ-アミノプロピルトリメトキシシランが挙げられる。第1級アミノ基および第2級アミノ基を有するアルコキシシリル化合物としては、例えば、N-β(アミノエチル)γ-アミノプロピルトリメトキシシラン(別名:N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン)、N-β(アミノエチル)γ-アミノプロピルトリエトキシシラン(別名:N-2-(アミノエチル)-3-アミノプロピルトリエトキシシラン)、N-β(アミノエチル)γ-アミノプロピルメチルジメトキシシラン(別名:N-2-(アミノエチル)-3-アミノプロピルメチルジメトキシシラン)、および、N-β(アミノエチル)γ-アミノプロピルメチルジエトキシシラン(別名:N-2-(アミノエチル)-3-アミノプロピルメチルジエトキシシラン)が挙げられる。第1級アミノ基、または、第1級アミノ基および第2級アミノ基を有するアルコキシシリル化合物として、好ましくは、第1級アミノ基および第2級アミノ基を有するアルコキシシリル化合物、より好ましくは、N-β(アミノエチル)γ-アミノプロピルトリメトキシシラン(別名:N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン)が挙げられる。
無機粒子は、耐熱層(後述)の耐熱性を向上させるために配合される。
ポリウレタン水性組成物は、ポリウレタン樹脂(ポリウレタン樹脂の水分散液)と無機粒子とを混合することにより得られる。
耐熱コート剤は、上記ポリウレタン水性組成物を含む。そのため、基材層(後述)の一方面をヒートシールするときに、基材層(後述)の他方面のヒートシールを抑制できる。
図1を参照して、本発明の第1積層体の一実施形態を説明する。
耐熱層2は、面方向(厚み方向に直交する方向)に沿って延び、平坦な表面と裏面とを有するシート形状を有する。
ポリオレフィン系の第1フィルム3は、面方向(厚み方向に直交する方向)に沿って延び、平坦な表面と裏面とを有するシート形状を有する。
接着層4は、面方向(厚み方向に直交する方向)に沿って延び、平坦な表面と裏面とを有するシート形状を有する。
ポリオレフィン系の第2フィルム5は、面方向(厚み方向に直交する方向)に沿って延び、平坦な表面と裏面とを有するシート形状を有する。
図2A~図2Dを参照して、第1積層体1の製造方法の一実施形態を説明する。
第1工程では、図2Aに示すように、ポリオレフィン系の第1フィルム3を準備する。
第2工程では、図2Bに示すように、ポリオレフィン系の第1フィルム3の厚み方向他方面に、ポリウレタン水性組成物を塗布し、乾燥させることにより、耐熱層2を配置(積層)する。
第3工程では、図2Cに示すように、ポリオレフィン系の第1フィルム3の厚み方向一方面に、接着層4を配置(積層)する。
第4工程では、図2Dに示すように、接着層4の厚み方向一方面に、ポリオレフィン系の第2フィルム5を配置(積層)する。
図3を参照して、本発明の第2積層体の一実施形態を説明する。
図4Aおよび図4Bを参照して、第2積層体20の製造方法の一実施形態を説明する。
第5工程では、図4Aに示すように、基材層21を準備する。具体的には、上記した第3工程および第4工程と同様の手順に基づいて、ポリオレフィン系の第1フィルム3の厚み方向他方面に、接着層4およびポリオレフィン系の第2フィルム5を順に配置する。
第6工程では、図4Bに示すように、基材層21の厚み方向一方面に、ポリウレタン水性組成物を塗布し、乾燥させることにより、耐熱層2を配置する。具体的には、上記第2工程と同様の手順に基づいて、基材層21(ポリオレフィン系の第1フィルム3)の厚み方向一方面に、断熱層2を配置する。
ポリウレタン水性組成物によれば、ポリウレタン樹脂および無機粒子の総量に対するポリウレタン樹脂の配合割合および無機粒子の配合割合が、所定の範囲である。そのため、基材層21の一方面をヒートシールするときに、基材層21の他方面のヒートシールを抑制できる。より具体的には、第1積層体1において、ポリオレフィン系の第2フィルム5をヒートシールするときに、ポリオレフィン系の第1フィルム3のヒートシールを抑制できる。
図5A~図5Cを参照して、スタンディングパウチの製造方法一実施形態を説明する。
変形例において、一実施形態と同様の部材および工程については、同一の参照符号を付し、その詳細な説明を省略する。また、変形例は、特記する以外、一実施形態と同様の作用効果を奏することができる。さらに、一実施形態および変形例を適宜組み合わせることができる。
ガスバリア層6は、面方向(厚み方向に直交する方向)に沿って延び、平坦な表面と裏面とを有するシート形状を有する。
積層体1の製造方法は、ポリオレフィン系の第1フィルム3を準備する第1工程と、ポリオレフィン系の第1フィルム3の厚み方向他方面に、耐熱層2を配置(積層)する第2工程と、ポリオレフィン系の第1フィルム3の厚み方向一方面に、ガスバリア層6を配置(積層)する第5工程と、ガスバリア層6の厚み方向一方面に、接着層4を配置(積層)する第3工程と、接着層4の厚み方向一方面に、ポリオレフィン系の第2フィルム5を配置(積層)する第4工程とを備える。
(条件)
試験装置:超微小硬度計DUH-211(島津製作所社製)
圧子の種類:Triangular115
試験モード:負荷-除荷試験
試験条件:試験力:0.5mN、設定深さ:1.0μm、負荷速度:3.0mN/秒
H12MDI:4,4′-メチレンビス(シクロヘキシルイソシアネート)
1,3-H6XDI:1,3-ビス(イソシアナトメチル)シクロヘキサン
m-XDI:1,3-キシリレンジイソシアネート
U-5620:ポリエステルポリオール(アジピン酸と、1,6-ヘキサンジオールと、ネオペンチルグリコールとの重縮合物)、数平均分子量2000、商品名「タケラックU-5620」、三井化学社製
U-9025:ポリエステルポリオール(イソフタル酸と、セバシン酸と、エチレングリコールと、ネオペンチルグリコールとの重縮合物)、数平均分子量2500、商品名「タケラックU-9025」、三井化学社製
T-6002:ポリカーボネートジオール(商品名「デュラノールT-6002」、旭化成社製)
DMPA:ジメチロールプロピオン酸
DEA:N-メチルジエタノールアミン
EG:エチレングリコール
TEG:トリエチレングリコール
TMP:トリメチロールプロパン
MEK:メチルエチルケトン
TEA:トリエチルアミン
KBM-603:アルコキシシリル化合物、N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン、信越化学工業社製
A-EA:2-((2-アミノエチル)アミノ)エタノール
EDA:エチレンジアミン
IPA:2-プロパノール
タケネートD-110N(キシリレンジイソシアネートのトリメチロールプロパン(TMP)アダクト体、イソシアネート基含有量11.5質量%、固形分75質量%、溶媒:酢酸エチル、三井化学社製)
TM-50:コロイダルシリカ、平均粒子径22nm、固形分濃度50質量%、GRACE社製
HS-30:コロイダルシリカ、平均粒子径12nm、固形分濃度30質量%、GRACE社製
A2:アルミナゾル、平均粒子径66nm、固形分濃度13.9質量%、川研ファインケミカル株式会社製
F1000:アルミナゾル、平均粒子径169nm、固形分7.5質量%、川研ファインケミカル株式会社製
LLDPE:直鎖状低密度ポリエチレンフィルム、膜厚30μm
LDPE:低密度ポリエチレンフィルム、膜厚100μm
OPP:二軸延伸ポリプロピレンフィルム、膜厚20μm
CPP:未延伸ポリプロピレンフィルム、膜厚60μm
合成例1
室温(25℃)において、攪拌機、温度計、冷却器および窒素ガス導入管を備えた容量1Lの反応器に、U-5620 123.7質量部、TEG 18.6質量部、DMPA16.6質量部、および、MEK141.0質量部を仕込んで、それらを液温60℃にて10分間攪拌した。
合成例1と同様の手順に基づいて、ポリウレタン樹脂の水分散液(ポリウレタンディスパージョン)を得た。但し、表1に基づいて、配合処方を変更した。また、合成例4では、鎖伸長を実施しなかった。具体的には、中和剤(酢酸)および有機溶剤(アセトニトリル)を添加した後の反応液に、鎖伸長剤を添加することなく、15℃~25℃に冷却した水970質量部を添加し。攪拌し乳化させた。
調製例1~調製例14および調製例17
表2の配合処方に基づいて、ガラス瓶中で、イオン交換水と、水溶性有機溶剤とを混合した。次いで、これに、無機粒子を配合した。なお、無機粒子が、コロイダルシリカまたはアルミナゾルである場合には、無機粒子の水分散液をマグネチックスターラーで攪拌しながら、配合した。次いで、ポリウレタン樹脂の水分散液を配合した。これにより、ポリウレタン水性組成物を調製した。表2において、ポリウレタン樹脂は、ポリウレタン樹脂の水分散液の質量部を示し、また、無機粒子は、無機粒子の水分散液の質量部を示す。
実施例1
[第1工程]
第1フィルムとして、LLDPEを準備した。
第1フィルムの厚み方向他方面に、コロナ処理を施した。処理後、第1フィルムの厚み方向他方面の表面濡れ張力は、41dyn以上であった。
次いで、第1フィルムの厚み方向他方面に、調製例1のポリウレタン水性組成物を、バーコーダ法により塗布し、60℃で30秒間乾燥させた。これにより、第1フィルムの厚み方向他方面に、耐熱層を配置(積層)した。
第1フィルムの厚み方向一方面に、ドライラミネート用接着剤(タケラックA-969V(三井化学社製)とタケネートA-5(三井化学社製)を、乾燥厚み3g/m2となるように、バーコーダ法により塗布し、その後、ドライヤーで乾燥させた。これにより、第1フィルムの厚み方向一方面に、接着層を配置(積層)した。
接着層の厚み方向一方面に、第2フィルム(LLDPE)を配置(積層)した。その後、40℃で2日間エージングした。これにより、積層体を得た。
実施例1と同様の手順に基づいて、積層体を得た。但し、表3~表5に基づいて、処方を変更した。なお、比較例5~比較例8では、第2工程を実施しなかった(耐熱層を配置しなかった。)。また、比較例4は、耐熱層から無機粒子(コロイダルシリカ)が脱落してしまい、耐熱層が形成できなかった。
[第1工程]
第1フィルムとして、LLDPEを準備した。
第1フィルムの厚み方向他方面に、コロナ処理を施した。処理後、第1フィルムの厚み方向他方面の表面濡れ張力は、41dyn以上であった。
第1フィルムの厚み方向一方面に、アンカーコート剤(タケネートD-110N 2.6gおよび酢酸エチル97.4g)を用いて、アンカーコートの単位面積当たりの質量が0.2g/m2となるようにアンカーコート処理した。
ガスバリア層の厚み方向一方面に、ドライラミネート用接着剤(タケラックA-969V(三井化学社製)とタケネートA-5(三井化学社製)を、乾燥厚み3g/m2となるように、バーコーダ法により塗布し、その後、ドライヤーで乾燥させた。これにより、ガスバリア層の厚み方向一方面に、接着層を配置(積層)した。
接着層の厚み方向一方面に、第2フィルム(LLDPE)を配置(積層)した。その後、40℃で2日間エージングした。これにより、積層体を得た。
実施例24と同様の手順に基づいて、積層体を得た。但し、表4に基づいて、処方を変更した。また、第5工程において、アンカーコート処理に代えて、コロナ処理(第1フィルムの厚み方向一方面の表面濡れ張力が、50dyn以上)を実施した。
<ポリウレタンディスパージョンの平均粒子径>
各合成例のポリウレタンディスパージョンの平均粒子径を測定した。具体的には、濃厚系粒子径アナライザーFPAR-1000(大塚電子株式会社製)を用いて、平均粒子径を測定した。その結果を表1に示す。
各合成例のポリウレタンディスパージョンの粘度を測定した。具体的には、JIS K 7117(1999)に準拠して、25℃における粘度を測定した。その結果を表1に示す。
各実施例および各比較例の耐熱層の表面の外観を目視にて観察し、以下の基準に基づき評価した。
〇:はじき、ムラ、白濁のいずれも観測されなかった。
△:わずかな白濁が観測された。
□:スポット状の微細なはじきが観測された。
×:はじき、ムラ、白濁のうちいずれか1つ以上が観測された。
各実施例および各比較例について、積層体の厚み方向他方面(耐熱層)と、積層体の厚み方向一方面(第2フィルム)とを、面積20cm2で接触させ、50℃/10kg/48時間の条件で保管した。次いで、引張試験機により、300mm/分の速度でせん断方向に剥離した。その結果を表3~表5に示す。
各実施例および各比較例の耐熱層の耐熱層同士を接触させ、テスター産業社製、TP-701-B-HEAT SEAL TESTERを用いて120℃、0.2MPa、1秒の条件で、ヒートシールした。なお、このとき、ヒートシールバーへの固着防止のため、PETフィルムを介してヒートシールした。
耐熱層の残存状態について、以下の基準に基づき評価した。
〇:FT-IR測定から、耐熱層が残存しているとわかった。
△:FT-IR測定から、耐熱層が残存しているとわかったが、ピーク強度比が異なった。
×:FT-IR測定から、耐熱層が残存していないとわかった。
調整例2~調製例15および調整例17のポリウレタン水性組成物を用いて、12μm厚のPETフィルムの上に塗布量1.5gの耐熱層を形成した。得られた耐熱層の表面を以下の条件で超微小硬度計を用いてマルテンス硬さ(HMs、N/mm2)を測定し、評価した。
(条件)
試験装置:DUH-211(島津製作所社製)
圧子の種類:Triangular115
試験モード:負荷-除荷試験
試験条件:試験力:0.5mN、設定深さ:1.0μm、負荷速度:3.0mN/秒
実施例24~実施例26の積層体において、酸素透過測定装置(OX-TRAN2/20、MOCON社製)を用いて、20℃、相対湿度80%(80%RH)での1m2、1日および1気圧当たりの酸素透過量(OTR)を測定した。その結果を表4に示す。
実施例1~実施例26の積層体において、耐熱性の評価において、比較例1~比較例8に比べて、強度が低かった。つまり、耐熱層を介して、第1フィルム同士のヒートシールが抑制できたとわかる。
2 耐熱層
3 ポリオレフィン系の第1フィルム
4 接着層
5 ポリオレフィン系の第2フィルム
6 ガスバリア層
20 第2積層体
21 基材層
Claims (19)
- ポリウレタン樹脂および無機粒子を含み、
前記ポリウレタン樹脂は、環構造を有するポリイソシアネートを含むポリイソシアネート成分と、マクロポリオールおよび親水性基を含有する活性水素基含有化合物を含むポリオール成分との反応生成物を含み、
前記ポリウレタン樹脂および前記無機粒子の総量に対して、
前記ポリウレタン樹脂の配合割合が、5質量%以上95質量%以下であり、
前記無機粒子の配合割合が、5質量%以上95質量%以下であり、
前記無機粒子の平均粒子径が、5nm以上1000nm以下である、ポリウレタン水性組成物。 - 前記親水性基を含有する活性水素基含有化合物が、カルボキシ基と、水酸基および/またはアミノ基とを併有する化合物である、請求項1に記載のポリウレタン水性組成物。
- 前記無機粒子が、コロイド状の無機粒子である、請求項1に記載のポリウレタン水性組成物。
- 請求項1に記載のポリウレタン水性組成物を含む、耐熱コート剤。
- 耐熱層と、
ポリオレフィン系の第1フィルムと、
接着層と、
ポリオレフィン系の第2フィルムとを厚み方向一方側に向かって順に備え、
前記耐熱層は、請求項1に記載のポリウレタン水性組成物の乾燥物である、第1積層体。 - 前記耐熱層の単位面積当たりの質量が、0.1g/m2以上3.3g/m2以下である、請求項5に記載の第1積層体。
- 前記無機粒子の平均粒子径が、5nm以上170nm以下である、請求項5に記載の第1積層体。
- 前記耐熱層の下記条件で測定される硬さが、0.35N/mm2以上0.6N/mm2以下である、請求項5に記載の第1積層体。
(条件)
塗布量1.5gの耐熱層表面に対し、超微小硬度計を用いてマルテンス硬さ(HMs、N/mm2)を測定する。また、測定において、試験力を0.5mNとし、設定深さを1.0μmとし、負荷速度を3.0mN/秒とする。 - 前記第1フィルムおよび前記第2フィルムが、ポリエチレン、ポリプロピレン、エチレン系共重合体、および、プロピレン系共重合体からなる群から選択される少なくとも1種を含む、請求項5に記載の第1積層体。
- 前記第1フィルムの厚み方向他方面に、前記耐熱層が直接配置されており、
前記第1フィルムの厚み方向他方面には、コロナ処理、火炎処理、プラズマ処理および紫外線処理からなる群から選択される少なくとも1種の表面処理が施されている、請求項5に記載の第1積層体。 - 前記耐熱層と前記第1フィルムとの間、および/または、前記第1フィルムと接着層との間、および/または、前記接着層と前記第2フィルムとの間に、ガスバリア層を備える、請求項5に記載の第1積層体。
- 前記ガスバリア層は、キシリレンジイソシアネートを含むポリイソシアネート成分と、炭素数2~6のジオールおよび親水性基を含有する活性水素基含有化合物を含むポリオール成分との反応生成物であるイソシアネート基末端プレポリマーと、鎖伸長剤との反応生成物であるポリウレタン樹脂を含有するポリウレタンディスパージョンの乾燥物である、請求項11に記載の第1積層体。
- 前記ガスバリア層の単位面積当たりの質量が、0.8g/m2以上3.5g/m2以下である、請求項11に記載の第1積層体。
- 前記第1フィルムおよび前記第2フィルムが、ともに同一である、請求項5に記載の第1積層体。
- 請求項5に記載の第1積層体からなる、袋。
- 基材層と耐熱層とを厚み方向一方側に向かって順に備え、
前記耐熱層は、請求項1に記載のポリウレタン水性組成物の乾燥物であり、
前記基材層が、ポリオレフィン系フィルム、ポリエステル系フィルム、および、ナイロンフィルムからなる群から選択される少なくとも1種である、第2積層体。 - 前記耐熱層の厚み方向一方面のマルテンス硬さと、前記基材層の厚み方向他方側のマルテンス硬さとの差の絶対値が、0.25以上0.80以下である、請求項16に記載の第2積層体。
- ポリオレフィン系の第1フィルムを準備する第1工程と、
前記ポリオレフィン系の第1フィルムの厚み方向他方面に、請求項1に記載のポリウレタン水性組成物を塗布し、乾燥させることにより、耐熱層を配置する第2工程と、
前記ポリオレフィン系の第1フィルムの厚み方向一方面に、接着層を配置する第3工程と、
前記接着層の厚み方向一方面に、ポリオレフィン系の第2フィルムを配置する第4工程とを備える、第1積層体の製造方法。 - 基材層を準備する第5工程と、
前記基材層の厚み方向一方面に、請求項1に記載のポリウレタン水性組成物を塗布し、乾燥させることにより、耐熱層を配置する第6工程とを備え、
前記第5工程では、前記基材層の厚み方向一方面に、コロナ処理、火炎処理、プラズマ処理および紫外線処理からなる群から選択される少なくとも1種の表面処理を施す、第2積層体の製造方法。
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