WO2014092027A1 - Microwavable sheet and process for manufacturing microwavable sheet - Google Patents
Microwavable sheet and process for manufacturing microwavable sheet Download PDFInfo
- Publication number
- WO2014092027A1 WO2014092027A1 PCT/JP2013/082885 JP2013082885W WO2014092027A1 WO 2014092027 A1 WO2014092027 A1 WO 2014092027A1 JP 2013082885 W JP2013082885 W JP 2013082885W WO 2014092027 A1 WO2014092027 A1 WO 2014092027A1
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- WIPO (PCT)
- Prior art keywords
- resin layer
- base paper
- microwave oven
- sheet
- resin
- Prior art date
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
- B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
- D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24322—Composite web or sheet
Definitions
- the present invention relates to a microwave oven compatible sheet and a method of manufacturing a microwave oven compatible sheet.
- This oil-resistant paper has a resin layer containing a hydrogen-bonding resin and oil-absorbing particles on at least one side of a paper support, and is excellent in oil resistance.
- this oil-resistant paper has a resin layer in order to ensure oil resistance, and the moisture permeability may be impaired by this resin layer. For this reason, when food such as fried food is packaged, if a certain amount of time elapses after the food is packaged, water vapor in the sheet is not released outside the sheet, and the surface of the packaged food is condensed. The quality of the packaged food may not be maintained. In addition, when the food is heated with the microwave oven in the packaged state, the water vapor in the sheet is not released and moisture adheres to the surface of the food, which may deteriorate the quality of the food.
- This invention is made
- the microwave oven-compatible sheet according to the present invention made to solve the above problems is A base paper, and a resin layer laminated by applying a coating liquid of the resin composition on one surface of the base paper,
- the resin layer has a plurality of pores.
- the microwave oven-compatible sheet is provided with a resin layer on one side of the base paper, so that it is difficult for oil to penetrate.
- the resin layer is formed with a plurality of pores appropriately by applying the coating liquid of the resin composition on one surface of the base paper, the above-described oil penetration is suppressed.
- water vapor can be suitably permeated by the pores.
- Such a microwave oven-compatible sheet has excellent moisture permeability while ensuring oil resistance as described above, so that foods such as fried food and hamburgers packaged with the microwave oven-compatible sheet can be kept in a packaged state using a microwave oven. Even when the heat treatment is performed, water vapor is released while suppressing oil permeation, so that the texture is less likely to be impaired by suppressing the adhesion of water droplets to the surface of the food.
- seat has a water vapor transmission rate 200g / m ⁇ 2 > 24hr or more and 15000g / m ⁇ 2 > 24hr or less.
- the pores are preferably formed on one surface of the base paper by applying the coating liquid with a roll having an intaglio on the surface.
- the pores by applying the coating liquid with the roll having the intaglio, desired pores can be easily and reliably formed in the resin layer.
- seat can show
- the pores may be formed by applying the coating liquid on one surface of the base paper having a fine uneven shape.
- the coating liquid on one surface of the base paper having a fine uneven shape desired pores can be easily and reliably formed in the resin layer.
- seat can show
- the microwavable sheet that the resin layer is formed by the coating liquid is coated at a coat weight 0.01 g / m 2 or more 20 g / m 2 or less in terms of solid content Is preferred.
- seat can show
- the resin layer is preferably laminated on both sides of the base paper.
- seat can have preferable oil resistance and moisture permeability with the resin layer of both surfaces of a base paper.
- the main component of the resin layer is preferably an acrylic resin, an olefin resin, or a carbonyl group-containing resin. With this configuration, the oil resistance of the microwave oven-compatible sheet can be improved.
- the base paper is preferably oil-resistant paper.
- the base paper is oil-resistant paper, the oil resistance of the microwave oven-compatible sheet can be improved.
- the microwave oven-compatible sheet preferably further includes a printing unit disposed on one surface of the base paper.
- a printing unit disposed on one surface of the base paper.
- the microwave oven-compatible sheet has an oil shielding property from one to the other of 1 hour or more. By adopting this configuration, the penetration of the oil can be more effectively prevented.
- the manufacturing method of the microwave oven-compatible sheet according to the present invention is as follows. Having a step of forming a resin layer by applying a coating liquid of the resin composition on one side of the base paper, In the step of forming the resin layer, the resin layer is formed to provide a plurality of pores in the resin layer.
- the above-described microwave oven-compatible sheet can be manufactured, and the above-described advantages can be achieved. That is, in the microwave oven-compatible sheet manufactured by the manufacturing method, oil and moisture hardly permeate from one to the other of the microwave oven-compatible sheet, and water vapor is easily released from one of the microwave oven-compatible sheets to the other.
- pores refer to fine pores formed in the resin layer.
- Measure permeability refers to a value measured according to the cup method (JISZ0208).
- Oil shielding is a value obtained by dropping 3 g of salad oil onto the resin layer under the condition of 40 ° C., and measuring the time required to break through.
- the microwave oven-compatible sheet according to the present invention prevents the outer surface oil from permeating and is excellent in moisture permeability.
- seat for microwave ovens which concerns on this invention can manufacture the sheet
- the microwave oven-compatible sheet 1 includes a base paper 2, a resin layer 3 laminated on one surface of the base paper 2, and a printing unit 4 formed on the other surface of the base paper 2.
- the base paper 2 is not particularly limited, but paper made of pulp slurry containing pulp fibers as a main component is preferably used.
- Examples of the base paper 2 include pure white roll paper, glassine paper, paraffin paper, craft paper, imitation paper, thin paper, general fine paper, and Japanese paper. Among these, pure white roll paper is preferable.
- the basis weight of the base paper 2 is preferably 15 g / m 2 or more and 60 g / m 2 or less, more preferably 20 g / m 2 or more and 50 g / m 2 or less, and further preferably 25 g / m 2 or more and 30 g / m 2 or less.
- the basis weight of the base paper 2 exceeds the above upper limit, the rigidity of the base paper 2 is increased, so that the base paper 2 is less likely to deform along the shape of the food to be packaged, and the food can be directly packaged by the microwave oven-compatible sheet 1. May be difficult.
- the basis weight of the base paper 2 is less than the above lower limit, the strength may be reduced and the paper may be easily broken.
- the base paper 2 can contain a fluorine-based additive in order to impart or improve oil resistance.
- the fluorine-based additive include a composition containing a compound having a perfluoroalkyl group having a carbon chain length of 6 or less.
- the compounds having a perfluoroalkyl group having a carbon chain length of 6 or less those having a larger carbon chain length are preferable in terms of excellent oil resistance, and compounds having a perfluoroalkyl group having a carbon chain length of 5 or 6 are more preferable.
- the carbon chain length of the perfluoroalkyl group is 7 or more, there is a possibility that the load on the environment may increase, such being undesirable.
- Commercially available products may be used as the fluorine-based additive. Examples of commercially available products include “AG-E060” manufactured by Asahi Glass Co., Ltd.
- the content of the fluorine-based additive in the base paper 2 is preferably 0.001 g / m 2 or more and 1.0 g / m 2 or less, more preferably 0.3 g / m 2 or more and 0.7 g / m 2 or less in terms of solid content. preferable. If the content of the fluorinated additive in the base paper 2 exceeds the upper limit, the base paper 2 may have a high rigidity, which may make it difficult to package along the shape of the food. On the other hand, when the content of the fluorine-containing additive in the base paper 2 is less than the lower limit, sufficient oil resistance may not be obtained.
- Examples of the method of adding the fluorinated additive to the base paper 2 include impregnating the base paper 2 with a solution containing the fluorinated additive, or a coating liquid containing the fluorinated additive on at least one side of the base paper 2.
- coating are mentioned.
- coating the coating liquid containing fluorine-based additives on the surface of the base paper 2 it may be applied on-machine with a coating machine attached to the paper machine, or with a coating machine separated from the paper machine. Off-machine coating may be performed.
- the thickness of the base paper 2 is not particularly limited, but is preferably 0.03 mm to 0.1 mm, and more preferably 0.04 mm to 0.08 mm. If the thickness of the base paper 2 exceeds the above upper limit, the rigidity of the microwave oven-compatible sheet 1 increases, so that it is difficult to deform along the shape of the food to be packaged, and it may be difficult to directly package the food. is there. On the other hand, when the thickness of the base paper 2 is less than the above lower limit, the strength of the microwave oven-compatible sheet may be reduced and easily broken.
- the resin layer 3 is formed by applying a coating liquid of the resin composition on one surface of the base paper 2.
- a coating liquid of the resin composition an acrylic resin, an olefin resin, or a carbonyl tree-containing resin is used.
- acrylic resin examples include copolymers such as acrylic polymer and acrylic-styrene copolymer. Specifically, styrene and styrene derivatives, acrylic acid (methacrylic acid) and alkyl acrylates such as methyl acrylate, ethyl acrylate and butyl acrylate, and alkyl methacrylates such as methyl methacrylate were copolymerized.
- Acrylic copolymers ethylene-acrylic acid copolymer sodium salts, ethylene-acrylic acid copolymer ammonium salts such as ethylene-acrylic acid copolymer ammonium salts, copolymers of acrylamide and acrylic acid (methacrylic acid), Examples include a copolymer of acrylonitrile and acrylic acid (methacrylic acid).
- olefin resin examples include low density polyethylene, high density polyethylene, polypropylene, ethylene copolymer, and the like.
- carbonyl group-containing resin examples include styrene / acrylic acid ester copolymers, epoxy ester resins, urethane resins, and oil-modified phenol resins.
- the styrene / acrylic acid ester copolymer is not particularly limited, but can be produced by a known emulsion polymerization method.
- a surfactant in order to obtain a certain hydrophilicity.
- the surfactant include anionic surfactants such as fatty acid soaps, alkyl sulfonates, alkyl benzene sulfonates, alkyl sulfosuccinates, and polyoxyethylene alkyl sulfates. This surfactant is preferably used in an amount of 1 to 10 parts by weight with respect to 100 parts by weight of the monomer mixture.
- epoxy ester resins can be employed, and can be obtained by causing esterification with ring opening of the oxirane ring by reaction of the epoxy resin and a compound containing a carboxyl group.
- the urethane resin is not particularly limited.
- a polymer obtained by polymerizing polyisocyanate and polyol can be used.
- the polyol include polyether polyol, polyester polyol, polylactone polyol, and polycarbonate polyol.
- the isocyanate is not particularly limited, but examples thereof include aliphatic diisocyanate compounds such as hexamethylene diisocyanate and 2,2,4-trimethylhexamethylene diisocyanate, isophorone diisocyanate, hydrogenated xylylene diisocyanate, and 1,4-cyclohexane diisocyanate.
- Alicyclic diisocyanate compounds such as 4,4'-dicyclohexylmethane diisocyanate, araliphatic diisocyanate compounds such as xylylene diisocyanate and tetramethylxylene diisocyanate, aromatic diisocyanate compounds such as toluylene diisocyanate and phenylmethane diisocyanate, Modified products (carbodiimide, uretdione, uretoimine-containing modified products, etc.) can be employed.
- the polyether polyol is not particularly limited, and for example, polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol and the like can be employed.
- the polyester polyol is not particularly limited.
- polyethylene adipate, polybutylene adipate, polyneopentyl adipate, poly-3-methylpentyl adipate, polyethylene / butylene adipate, polyneopentyl / hexyl adipate, etc. can be used. It is.
- the polylactone polyol is not particularly limited, and for example, polycaprolactone diol, polyomegahydroxycaproic acid polyol, and the like can be used.
- the polycarbonate polyol is not particularly limited.
- a product obtained by reacting a diol such as glycol with phosgene and a diaryl carbonate such as diphenyl carbonate or a cyclic carbonate such as ethylene carbonate or propylene carbonate can be employed.
- the polyester carbonate obtained by reaction of polyester or polylactone, phosgene, and a diaryl carbonate or a cyclic carbonate is mentioned.
- the oil-modified phenol resin is not particularly limited, and for example, a resin obtained by reacting phenols, aldehydes and oil under an acidic catalyst can be used.
- the oil used for modification is not particularly limited, and for example, one or more selected from vegetable oils, particularly cashew oil, linseed oil, paulownia oil, castor oil and tall oil can be employed. Among these, cashew oil is preferable from the viewpoint of storage stability.
- the oil-modified phenol resin it is preferable to employ a cashew oil-modified novolac type phenol resin.
- the resin layer 3 may contain a filler so that the resin layer 3 has smoothness with food (an effect of preventing the resin layer 3 from being caught on the food).
- the filler contained in the resin layer 3 is not particularly limited, and examples thereof include inorganic fine particles and organic fine particles.
- aluminum silicate is preferably used, and silica, barium sulfate, titanium oxide, or the like can also be used. Only 1 type may be used for the said filler and it may mix and use 2 or more types.
- the average particle size of the filler is not particularly limited, but is preferably 50 nm or more and 500 nm or less.
- the upper limit of the average particle size of the filler is more preferably 350 nm, and even more preferably 300 nm.
- the lower limit of the average particle size of the filler is more preferably 60 nm, and still more preferably 80 nm.
- the average particle diameter of the filler exceeds the upper limit, the smoothness between the food and the resin layer 3 may not be improved much.
- the average particle diameter of the filler is less than the lower limit, the filler aggregates in the coating liquid, and the smoothness between the food and the resin layer 3 may not be sufficiently exhibited.
- the content of the filler in the resin layer 3 is not particularly limited, but is preferably 1 part by weight or more and 20 parts by weight or less with respect to 100 parts by weight of the resin as the main component of the resin composition.
- the upper limit of the content of the filler is more preferably 15 parts by weight, and still more preferably 10 parts by weight.
- the lower limit of the content of the filler is more preferably 3 parts by weight, and still more preferably 5 parts by weight.
- the average thickness of the resin layer 3 is not particularly limited, but is preferably 0.01 mm or more and 0.08 mm or less, and more preferably 0.03 mm or more and 0.05 mm or less.
- the thickness of the resin layer 3 is less than the above lower limit, the oil resistance of the microwave oven-compatible sheet 1 may not be sufficiently ensured.
- the thickness of the resin layer 3 exceeds the above upper limit, the rigidity of the microwave oven-compatible sheet 1 is increased, so that it is difficult to deform along the shape of the food to be packaged, and it is difficult to directly package the food. There is a risk.
- the resin layer 3 has a plurality of pores 3a.
- the confirmation of the pores 3a is not particularly limited, and a known method can be adopted. Alternatively, a pigment may be applied to the resin layer 3 to check the pores 3a.
- the printing unit 4 is not particularly limited, but can be one in which a pigment is fixed to the base paper 2 with a binder.
- the pigment is not particularly limited, and a black pigment, a white pigment, a red pigment, a blue pigment, a yellow pigment, a green pigment, an orange pigment, a purple pigment, and the like can be appropriately used.
- the binder is not particularly limited, but acrylic resin, styrene resin, polyester resin, urethane resin, polyvinyl resin, alkyd resin, petroleum resin, ketone resin, epoxy resin, melamine
- synthetic resins such as a resin, a fluorine resin, a silicone resin, a fiber derivative, and a rubber resin, a copolymer, and the like can be employed.
- the water vapor transmission rate of the said microwave oven corresponding sheet 1 is not specifically limited, 200 g / m ⁇ 2 > 24hr or more and 15000g / m ⁇ 2 > 24hr or less are preferable.
- the upper limit of the water vapor transmission rate of the said microwave oven corresponding sheet 1 13000 g / m ⁇ 2 > is more preferable and 11000 g / m ⁇ 2 > is further more preferable.
- the moisture permeability lower limit of the microwavable sheet 1, 1000 g / m 2 is more preferable and more preferably 4000 g / m 2.
- the oil shielding property from one side of the microwave-compatible sheet 1 to the other is not particularly limited, but is preferably 1 hour or longer, more preferably 1.5 hours or longer, and further preferably 2 hours or longer. Thereby, penetration of the oil can be effectively prevented.
- the manufacturing method of the microwave oven-compatible sheet 1 includes a resin layer forming step and a printing step.
- the resin layer forming step is a step of forming the resin layer 3 on one surface of the base paper 2.
- the resin layer 3 is formed by applying a coating liquid of the resin composition to one surface of the base paper 2 and drying and curing the applied coating liquid. .
- the coating liquid is adjusted by mixing the resin composition and a solvent.
- the upper coating liquid is prepared by mixing the above resin composition such as a carbonyl group-containing resin and an aqueous solvent.
- the aqueous solvent is not particularly limited, and examples thereof include water alone or a mixture of alcohols such as ethanol and propanol and water.
- the coating method include a gravure coating method using a gravure printing machine.
- the surface of the gravure roll 14 has a plurality of concave cells 14 a for holding a large amount of the coating liquid 13 for forming the resin layer 3.
- the gravure roll 14 is rotated in the container 15 in which the coating liquid 13 is accommodated, and the gravure roll 14 is brought into contact with the surface of the base paper 2, whereby the coating liquid is applied to the portion corresponding to the cell 14 a portion of the gravure roll 14.
- the coating liquid 13 is applied in a large amount, and a small amount of the coating liquid 13 is applied to a portion that is not the cell 14a portion. As a result, it is easy to form pores 3a suitable for locations that are not the cell 14a portion (locations where a small amount of the coating liquid 13 is applied).
- a doctor blade (illustration omitted) is pressed against the surface of the gravure roll 14, and the adhesion amount of the desired coating liquid 13 can be adjusted appropriately.
- the adhesion amount of the desired coating liquid 13 can also be adjusted by adjusting the rotational speed of the gravure roll.
- the depth of the concave portion of the cell 14a of the gravure roll 14 is not particularly limited, but is preferably 10 ⁇ m or more and 70 ⁇ m or less, and more preferably 30 ⁇ m or more and 50 ⁇ m or less.
- the depth of the concave portion of the cell 14a is less than the above lower limit, many pores 3a of the resin layer 3 may be formed, and the oil resistance of the microwave oven-compatible sheet 1 may be impaired.
- the said upper limit is exceeded, since the thickness of the resin layer 3 becomes too thick and the rigidity of the said microwave oven corresponding sheet 1 becomes high, there exists a possibility that it may become difficult to package food directly with the said microwave oven corresponding sheet 1. There is.
- the coating amount in terms of solid content, preferably 0.01 g / m 2 or more 20 g / m 2 or less, 3 g / m 2 or more 8 g / m 2 or less is more preferred.
- the microwave oven-compatible sheet 1 can exhibit more excellent moisture permeability while ensuring sufficient oil resistance.
- the drying and curing of the coating liquid is not particularly limited, but the coating liquid can be dried and cured by a drying device (not shown).
- the printing process is a process of printing characters, designs, etc. for decoration on one side of the base paper 2.
- the printing unit 4 is applied to the surface opposite to the surface of the base paper 2 on which the resin layer 3 is laminated in the resin layer forming step.
- various known methods can be adopted as the printing method. Examples of the printing method include a gravure printing method, an offset printing method, a flexographic printing method, a silk screen printing method, and the like.
- the microwave-compatible sheet 1 includes the resin layer 3 on one surface of the base paper 2, by wrapping the food with the resin layer 3 as the inner side (food side), the oil from the food is compatible with the microwave oven. It is possible to accurately prevent the resin layer 3 from penetrating the outside of the sheet 1. Further, since the resin layer 3 has a plurality of pores 3a, water vapor is suitably released from the pores 3a. For this reason, even if food such as fried food or hamburger is heat-treated with a microwave oven in a packaged state, water vapor is suitably released from the pores 3a while suppressing oil permeation. There is little possibility that food texture will be impaired by adhesion being suppressed.
- the main component of the resin layer 3 is an acrylic resin, an olefin resin, or a carbonyl group-containing resin, the oil resistance of the microwave oven-compatible sheet 1 can be improved.
- the microwave oven-compatible sheet 1 is coated with the coating liquid 13 with a roll having an intaglio on the surface, so that the pores 3a that suitably release water vapor to the outside of the microwave oven-compatible sheet 1 are easily and reliably provided. Formed. For this reason, the said microwave oven-compatible sheet
- the outside of the said microwave oven corresponding sheet 1 is made by performing different printing for every kind of food to package, for example.
- the type of food can be identified simply by visual recognition.
- the microwave oven-compatible sheet 21 has a base paper 22, a resin layer 23 laminated on one side of the base paper 22, and the other side of the base paper 22. It has the printing part 4 formed.
- a base paper 22 having a fine uneven shape on one side is used as the base paper 22 .
- the surface roughness (ten-point average roughness) due to the fine uneven shape of the base paper 22 is not particularly limited, but is preferably 0.01 mm or more and 0.05 mm or less, and more preferably 0.02 mm or more and 0.03 mm or less.
- the desired pores 23a may not be appropriately formed in the resin layer 23 of the microwave oven-compatible sheet 21.
- pure white roll paper, glassine paper, paraffin paper, kraft paper, imitation paper, thin paper, general fine paper, Japanese paper, etc. similar to those used in the first embodiment can be used.
- the same thickness can be used.
- the resin layer 23 is formed on the fine uneven surface of the base paper 22.
- the resin layer 23 has a plurality of pores 23a.
- the average depth of the unevenness of the pores 23a of the resin layer 23 is preferably the same as the average depth of the pores 3a of the resin layer 3 of the first embodiment.
- the same forming material as the resin layer 3 used in the first embodiment can be used.
- the manufacturing method of the microwave oven-compatible sheet 21 includes a resin layer forming step and a printing step, as in the first embodiment.
- the coating liquid is applied to one surface of the base paper 22 to form the resin layer 23.
- the coating method a method of coating by a roll coating method using a roll having a smooth surface, a bar coating method or the like is employed. Specifically, as shown in FIG. 4, the solid roll 34 is rotated in the container 15 in which the coating liquid 13 is stored, so that the solid roll 34 holds the coating liquid 13. And the coating liquid 13 can be apply
- the pressure at which the solid roll 34 is brought into contact is adjusted so that the resin layer is thinly formed on the convex portion of the uneven surface of the resin layer 23. Then, the solid roll 34 is pressure-bonded to the resin layer 23. As a result, a resin layer is formed on the surface of the base paper 22, and the resin layer 23 is formed with a constant thickness by a smooth solid roll. Therefore, a portion where the resin layer 23 is thinly formed (the convex portion of the base paper). It is easy to form moderate pores 23a in the upper part.
- the printing unit 4 is formed on one surface of the base paper 22 by the same process as in the first embodiment.
- the resin layer 23 is formed on one surface of the fine irregular shape of the base paper 22, and the resin layer 23 is thinly formed (the fineness of the base paper 22.
- the pores 23a are easily formed moderately in the upper part of the uneven protrusions. Therefore, water vapor is suitably released through the pores 23a. Accordingly, since the microwave oven-compatible sheet 21 has excellent moisture permeability while ensuring oil resistance, even when heated by the microwave oven, water vapor is suitably released from the pores 23a, and thus the texture may be impaired. Less is.
- the resin layer is described as being laminated on one side of the base paper.
- the resin layer may be laminated on both sides of the base paper.
- the coating method on the base paper is not limited to the above-described method, and a public method such as a knife coating method, a blade coating method, a die coating method, a flexo coating method, or a dipping method can be employed.
- a resin layer having desired pores can be formed by adjusting the coating amount of the coating liquid of the resin layer forming material.
- a resin layer having desired pores may be formed by coating a base paper with a resin layer forming material containing a filler.
- the filler contained in the coating liquid is not particularly limited, and examples thereof include inorganic fine particles and organic fine particles.
- aluminum silicate is preferably used, and silica, barium sulfate, titanium oxide, or the like can also be used. Only 1 type may be used for the said filler and it may mix and use 2 or more types.
- the average particle size of the filler is not particularly limited, but is preferably 50 nm or more and 500 nm or less.
- the upper limit of the average particle size of the filler is more preferably 350 nm, and even more preferably 300 nm.
- the lower limit of the average particle size of the filler is more preferably 60 nm, and still more preferably 80 nm. If the average particle size of the filler is outside the above range, the desired pores may not be suitably formed.
- the content of the filler in the resin layer 3 is not particularly limited, but is preferably 1 part by weight or more and 20 parts by weight or less with respect to 100 parts by weight of the resin as the main component of the resin layer 3.
- the upper limit of the content of the filler is more preferably 15 parts by weight, and still more preferably 10 parts by weight.
- the lower limit of the content of the filler is more preferably 3 parts by weight, and still more preferably 5 parts by weight. If the content of the filler is outside the above range, the desired pores may not be suitably formed.
- the resin layer in which pores are formed has been described.
- the resin layer may have the pore valve.
- the above-mentioned pore valve is formed so as to cover the pores, and is formed by adjusting the coating amount when the resin layer coating liquid is applied.
- a coating liquid is applied by a roll having an intaglio on the surface to form a resin layer
- the coating liquid is applied to a portion where the cells of the gravure roll do not come into contact, but the coating liquid
- the coating amount is adjusted so that a pore is formed at a portion where the coating is applied and a resin film is formed so as to cover the pore.
- pores are formed in the resin layer, and the coating liquid around the pores is connected to the upper portion of the formed pores, and a thin film-like valve is formed at the upper portion of the pores. For this reason, oil penetration can be prevented by this valve as well, and regarding the release of water vapor, since a thin film-like valve is pressed by the pressure of the water vapor, a gap is formed in this valve. Preferably released.
- pore valves In order to form pore valves, not only by adjusting the coating amount, but also by adjusting the rotation speed of the gravure roll, the composition of the coating liquid, the temperature at which the coating liquid is dried, the time, etc.
- the resin layer can be laminated to form a pore valve.
- oil-resistant paper may be used as the base paper.
- oil resistant paper known oil resistant paper can be used. Thereby, the oil resistance of the said microwave oven corresponding sheet can be improved.
- the material for forming the resin layer is not limited to those described in the above embodiment, and any resin that exhibits oil resistance may be used.
- the printing process in the manufacturing method of the said microwave oven compatible sheet demonstrated the method of performing a printing process after a resin layer formation process
- this invention is not limited to this,
- the resin layer formation process It may be performed before S1. Furthermore, it is possible not to perform this printing step by preparing already printed base paper.
- Example 1 As the base paper, oil-resistant paper (trade name “EC oil-resistant paper 25”: manufactured by Tenma Special Paper Co., Ltd.) having a basis weight of 25 g / m 2 was used. A coating agent (trade name “Herville B-7”: manufactured by Daiichi Paint Co., Ltd.) is diluted with water to prepare a coating solution, and this coating solution is gravure-coated on one side of the base paper to form a resin. A layer was formed. The microwave oven-compatible sheet of Example 1 having a plurality of pores in the resin layer was obtained.
- Example 2 The coating liquid was similarly applied to the other surface of the microwave oven-compatible sheet of Example 1, and this coating solution was dried and cured to obtain the microwave oven-compatible sheet of Example 2.
- Comparative example As a comparative example, a thin paper (trade name “HS21 paper”: manufactured by Oji Paper Co., Ltd.) with 8 ⁇ m thick polyethylene laminated was used.
- Example 1 and Example 2 and the comparative example were subjected to an oil shielding test.
- This shielding test 3 g of salad oil was dropped on the resin layer under the condition of 40 ° C., and the time required for the breakthrough was measured.
- Example 1 oil breakthrough did not occur even after 3 hours. In Example 2, no show-through occurred after 5 hours or more. On the other hand, in the comparative example, breakthrough occurred within 30 minutes.
- Example 1 the water vapor transmission rate was 12400 g / m 2 24 hr. In Example 2, the water vapor transmission rate was 8500 g / m 2 24 hr. On the other hand, the comparative example was 96 g / m 2 24 hr.
- Example 1 and Example 2 resulted in having a high water vapor transmission rate while having a suitable range of oil resistance as described above.
- moisture permeability was low, and when it heated with the microwave oven, water droplet adhesion generate
- the microwave oven-compatible sheet of the present invention and the microwave oven-compatible sheet manufactured by the method of manufacturing the microwave oven-compatible sheet of the present invention have oil resistance and moisture permeability. It is suitably used as a sheet to be packaged when heat-treated with a range or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
- Package Specialized In Special Use (AREA)
Abstract
Description
基紙と、この基紙の一方の面に樹脂組成物の塗工液が塗工されることにより積層された樹脂層とを備え、
上記樹脂層が、複数の気孔を有している。 The microwave oven-compatible sheet according to the present invention made to solve the above problems is
A base paper, and a resin layer laminated by applying a coating liquid of the resin composition on one surface of the base paper,
The resin layer has a plurality of pores.
基紙の一方の面に樹脂組成物の塗工液を塗工することにより樹脂層を形成する工程を有し、
上記樹脂層を形成する工程で、上記樹脂層に複数の気孔を設けるべく樹脂層を形成する。 Moreover, the manufacturing method of the microwave oven-compatible sheet according to the present invention is as follows.
Having a step of forming a resin layer by applying a coating liquid of the resin composition on one side of the base paper,
In the step of forming the resin layer, the resin layer is formed to provide a plurality of pores in the resin layer.
<電子レンジ対応シート1>
当該電子レンジ対応シート1は、図1に示すように、基紙2、この基紙2の一方の面に積層される樹脂層3、及び基紙2の他方の面に形成される印刷部4を有する。 [First embodiment]
<Microwave-
As shown in FIG. 1, the microwave oven-
電子レンジ対応シート1の製造方法は、樹脂層形成工程及び印刷工程を有する。 <Method for Manufacturing
The manufacturing method of the microwave oven-
当該電子レンジ対応シート1は、基紙2の一方の面に樹脂層3を備えるため、この樹脂層3を内側(食品側)として食品を包装することにより、食品から出る油が当該電子レンジ対応シート1の外側に浸透することを樹脂層3によって的確に防止できる。また、この樹脂層3が、複数の気孔3aを有するため、この気孔3aから水蒸気が好適に放出される。このため、揚げ物やハンバーガー等の食品を包装状態のまま電子レンジにより加熱処理しても、油の浸透が抑制されつつこの気孔3aより水蒸気が好適に放出されるので、食品の表面への水滴の付着が抑制されることで食感が損なわれるおそれが少ない。 <Advantages>
Since the microwave-
次に、第二の実施形態である電子レンジ対応シート21について説明する。なお、第二の実施形態の説明において、第一の実施形態と同一構成又は同一機能を有する部材等については同一符号を用いて、その詳細な説明を省略することがある。 [Second Embodiment]
Next, the microwave oven-
本発明は、上記実施形態に限定されるものではなく、本発明の意図する範囲内において適宜設計変更可能である。 [Other Embodiments]
The present invention is not limited to the above-described embodiment, and can be appropriately modified within the intended scope of the present invention.
次に、当該電子レンジ対応シートの二つの実施例について説明するが、この実施例に本願発明は拘束されるものでない。 [Example]
Next, two examples of the microwave oven-compatible sheet will be described, but the present invention is not limited to these examples.
基紙として坪量25g/m2の耐油紙(商品名「EC耐油紙25」:天満特殊製紙株式会社製)を用いた。塗工剤(商品名「ハービルB-7」:第一塗料株式会社製)を水にて希釈して塗工液を調整し、この塗工液を上記基紙の片面にグラビア塗工し樹脂層を形成した。樹脂層に、複数の気孔を有する実施例1の電子レンジ対応シートを得た。 (Example 1)
As the base paper, oil-resistant paper (trade name “EC oil-resistant paper 25”: manufactured by Tenma Special Paper Co., Ltd.) having a basis weight of 25 g / m 2 was used. A coating agent (trade name “Herville B-7”: manufactured by Daiichi Paint Co., Ltd.) is diluted with water to prepare a coating solution, and this coating solution is gravure-coated on one side of the base paper to form a resin. A layer was formed. The microwave oven-compatible sheet of Example 1 having a plurality of pores in the resin layer was obtained.
実施例1の電子レンジ対応シートの他方の面にも同様に塗工液を塗工し、この塗工液を乾燥硬化して実施例2の電子レンジ対応シートを得た。 (Example 2)
The coating liquid was similarly applied to the other surface of the microwave oven-compatible sheet of Example 1, and this coating solution was dried and cured to obtain the microwave oven-compatible sheet of Example 2.
比較例として、薄洋紙(商品名「HS21紙」:王子製紙株式会社製)に8μmの厚さのポリエチレンがラミネートされた物を用いた。 (Comparative example)
As a comparative example, a thin paper (trade name “HS21 paper”: manufactured by Oji Paper Co., Ltd.) with 8 μm thick polyethylene laminated was used.
実施例1及び実施例2並びに比較例について油の遮蔽性試験を行った。この遮蔽性試験は、40℃の条件下で3gのサラダ油を樹脂層に滴下し、裏抜けに要する時間を測定した。 (Oil resistance)
Example 1 and Example 2 and the comparative example were subjected to an oil shielding test. In this shielding test, 3 g of salad oil was dropped on the resin layer under the condition of 40 ° C., and the time required for the breakthrough was measured.
次に、実施例1及び実施例2並び比較例について透湿度試験を行った。この透湿度試験は、カップ法(JISZ0208)に準じて行った。 (Moisture permeability)
Next, the moisture permeability test was performed for Example 1 and Example 2 and the comparative example. This moisture permeability test was performed according to the cup method (JISZ0208).
実施例1及び実施例2は、上記のように耐油度が好適な範囲を有しつつ、高い透湿度を有する結果となった。なお、比較例については、透湿度が低く、電子レンジで加熱した際にシート内面に水滴付着が発生した。 (result)
Example 1 and Example 2 resulted in having a high water vapor transmission rate while having a suitable range of oil resistance as described above. In addition, about the comparative example, moisture permeability was low, and when it heated with the microwave oven, water droplet adhesion generate | occur | produced on the sheet | seat inner surface.
2 基紙
3 樹脂層
3a 気孔
4 印刷部
13 塗工液
14 グラビアロール
14a セル
15 容器
21 電子レンジ対応シート
22 基紙
23 樹脂層
23a 気孔
34 ベタロール DESCRIPTION OF
Claims (11)
- 基紙と、この基紙の一方の面に樹脂組成物の塗工液が塗工されることにより積層された樹脂層とを備え、
上記樹脂層が、複数の気孔を有している電子レンジ対応シート。 A base paper, and a resin layer laminated by applying a coating liquid of the resin composition on one surface of the base paper,
The sheet for microwave ovens in which the resin layer has a plurality of pores. - 透湿度が200g/m224hr以上15000g/m224hr以下である請求項1に記載の電子レンジ対応シート。 The sheet for microwave oven according to claim 1, wherein the moisture permeability is 200 g / m 2 24 hr or more and 15000 g / m 2 24 hr or less.
- 上記基紙の一方の面に、表面に凹版を有するロールにより上記塗工液が塗工されることによって上記気孔が形成されている請求項1に記載の電子レンジ対応シート。 The microwave oven-compatible sheet according to claim 1, wherein the pores are formed on one surface of the base paper by applying the coating liquid with a roll having an intaglio on the surface.
- 微細凹凸形状を有する上記基紙の一方の面に上記塗工液が塗工されることにより上記気孔が形成されている請求項1に記載の電子レンジ対応シート。 The microwave oven-compatible sheet according to claim 1, wherein the pores are formed by coating the coating liquid on one surface of the base paper having a fine uneven shape.
- 上記樹脂層が、上記塗工液が固形分換算において塗工量0.01g/m2以上20g/m2以下で塗工されることにより形成されている請求項1に記載の電子レンジ対応シート。 The resin layer is, microwavable sheet according to claim 1 which is formed by the coating liquid is coated at a coat weight 0.01 g / m 2 or more 20 g / m 2 or less in terms of solid content .
- 上記基紙の双方の面に上記樹脂層が積層されている請求項1に記載の電子レンジ対応シート。 The microwave oven-compatible sheet according to claim 1, wherein the resin layer is laminated on both sides of the base paper.
- 上記樹脂層の主成分が、アクリル系樹脂、オレフィン系樹脂又はカルボニル基含有樹脂である請求項1に記載の電子レンジ対応シート。 The microwave oven-compatible sheet according to claim 1, wherein a main component of the resin layer is an acrylic resin, an olefin resin, or a carbonyl group-containing resin.
- 上記基紙が、耐油紙である請求項1に記載の電子レンジ対応シート。 The microwave oven-compatible sheet according to claim 1, wherein the base paper is oil-resistant paper.
- 上記基紙の一方の面に配設される印刷部をさらに備える請求項1に記載の電子レンジ対応シート。 The microwave oven-compatible sheet according to claim 1, further comprising a printing unit disposed on one surface of the base paper.
- 一方から他方にかけての油の遮蔽性が1時間以上である請求項1に記載の電子レンジ対応シート。 2. The microwave oven-compatible sheet according to claim 1, wherein the oil shielding property from one to the other is 1 hour or more.
- 基紙の一方の面に樹脂組成物の塗工液を塗工することにより樹脂層を形成する工程を有し、
上記樹脂層を形成する工程で、上記樹脂層に複数の気孔を設けるべく樹脂層を形成する電子レンジ対応シートの製造方法。 Having a step of forming a resin layer by applying a coating liquid of the resin composition on one side of the base paper,
The manufacturing method of the sheet | seat for microwave ovens which forms the resin layer so that a plurality of pores may be provided in the resin layer in the step of forming the resin layer.
Priority Applications (3)
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KR1020157018461A KR20150094725A (en) | 2012-12-11 | 2013-12-06 | Microwavable sheet and process for manufacturing microwavable sheet |
CN201380063829.XA CN104838068A (en) | 2012-12-11 | 2013-12-06 | Microwavable sheet and process for manufacturing microwavable sheet |
US14/650,739 US20150337497A1 (en) | 2012-12-11 | 2013-12-06 | Microwaveable sheet, and production method of microwaveable sheet |
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JP2012-270833 | 2012-12-11 | ||
JP2012270833A JP6144903B2 (en) | 2012-12-11 | 2012-12-11 | Microwave oven-compatible sheet and method of manufacturing microwave oven-compatible sheet |
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WO2014092027A1 true WO2014092027A1 (en) | 2014-06-19 |
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ID=50934318
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PCT/JP2013/082885 WO2014092027A1 (en) | 2012-12-11 | 2013-12-06 | Microwavable sheet and process for manufacturing microwavable sheet |
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US (1) | US20150337497A1 (en) |
JP (1) | JP6144903B2 (en) |
KR (1) | KR20150094725A (en) |
CN (1) | CN104838068A (en) |
TW (1) | TWI532897B (en) |
WO (1) | WO2014092027A1 (en) |
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- 2013-12-06 US US14/650,739 patent/US20150337497A1/en not_active Abandoned
- 2013-12-06 WO PCT/JP2013/082885 patent/WO2014092027A1/en active Application Filing
- 2013-12-06 CN CN201380063829.XA patent/CN104838068A/en active Pending
- 2013-12-06 KR KR1020157018461A patent/KR20150094725A/en not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
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US20150337497A1 (en) | 2015-11-26 |
JP6144903B2 (en) | 2017-06-07 |
JP2014114524A (en) | 2014-06-26 |
TW201430188A (en) | 2014-08-01 |
TWI532897B (en) | 2016-05-11 |
KR20150094725A (en) | 2015-08-19 |
CN104838068A (en) | 2015-08-12 |
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