WO2018120700A1 - 防霉保鲜纸及其制备方法和制备装置 - Google Patents

防霉保鲜纸及其制备方法和制备装置 Download PDF

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Publication number
WO2018120700A1
WO2018120700A1 PCT/CN2017/090716 CN2017090716W WO2018120700A1 WO 2018120700 A1 WO2018120700 A1 WO 2018120700A1 CN 2017090716 W CN2017090716 W CN 2017090716W WO 2018120700 A1 WO2018120700 A1 WO 2018120700A1
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Prior art keywords
coating
keeping
mildew
paper
proof
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PCT/CN2017/090716
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English (en)
French (fr)
Inventor
余赞
田璐
钟文
罗臻
张勇军
韦雪雪
钱正宇
杜建军
Original Assignee
常德金德新材料科技股份有限公司
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Priority to ZA201800717A priority Critical patent/ZA201800717B/en
Publication of WO2018120700A1 publication Critical patent/WO2018120700A1/zh

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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
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • C09D123/08—Copolymers of ethene
    • C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09D123/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09D127/08—Homopolymers or copolymers of vinylidene chloride
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/22—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
    • C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C09D131/04—Homopolymers or copolymers of vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • 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
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/36—Coatings with pigments
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents

Definitions

  • the invention relates to the field of packaging technology, in particular to a moldproof fresh-keeping paper, a preparation method thereof and a preparation device.
  • packaging materials are plastic materials, paper and other materials, and the packaging of paper materials is generally used due to its environmental protection and excellent texture.
  • the packaging of paper materials is used for fruits, breads, and tobacco leaves, which have short shelf life, mildew and mildew, and need to be eaten in time, so as not to maintain a constant moisture and prevent mildew. Can not play a role in preservation.
  • An anti-mold and fresh-keeping paper comprising a paper base layer, a decorative coating layer and a mildew-proof fresh-keeping coating, wherein the mildew-proof fresh-keeping coating is disposed on a surface of the paper base layer, and the decorative coating layer is disposed on the paper base layer On the other surface, the raw material of the mildew-proof fresh-keeping coating is a mildew-proof fresh-keeping paint;
  • the mildew-proof fresh-keeping paint comprises the following components in a weight percentage: 20% to 60% of the resin, 30% to 70% of the solvent, 0.5% to 10% of the antifungal agent, and 0.3% to 5% of the auxiliary agent, wherein
  • the resin is polyurethane, acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, ethylene-vinyl acetate copolymer, polyvinyl acetate copolymer and vinyl acetate- At least one of the butyl ester copolymers, the solvent being at least one of water and ethanol.
  • the anti-mold and fresh-keeping paper of the above-mentioned anti-mold and fresh-keeping paper is heat-treated by the anti-mold and fresh-keeping coating, so that the resin undergoes cross-linking reaction to form a network structure, and the anti-fungal agent is dispersed in the network structure of the resin.
  • the obtained mildew-proof fresh-keeping coating has a dense surface and small pores, thereby having a good effect of maintaining a constant moisture; the anti-mold agent is dispersed inside the resin, and can effectively prevent mildew, thereby achieving a better preservation effect.
  • the above mildew preservation The paper is especially suitable for the preservation of fruits, breads and tobacco leaves, such as short storage period, short-term mildew and timely consumption of food.
  • the raw material of the decorative coating comprises 30% to 50% by weight of the decorative coating resin, 10% to 30% of the mica, 20% to 60% of the water, and 0 to 20% of the color ink. %; wherein the decorative coating resin is at least one of an acrylic resin, a polyurethane, and an epoxy resin.
  • the mold proof wrapper further comprises an information layer and a glue layer disposed between the paper base layer and the decorative coating layer, the information layer comprising an aluminized layer and being formed on the aluminized layer In the upper patterned layer, the adhesive layer bonds the paper base layer and the aluminum plating layer, and the decorative coating layer is disposed on the patterned character layer.
  • a method for preparing moldproof fresh-keeping paper comprising the following steps:
  • the preparation of the mildew-proof fresh-keeping paint comprises the following steps: providing a raw material, comprising: 20% to 60% of a resin, 30% to 70% of a solvent, and 0.5% to 10% of an antifungal agent according to a weight percentage And the additive is 0.3% to 5%; wherein the resin is polyurethane, acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, ethylene-vinyl acetate copolymer, poly At least one of a vinyl acetate copolymer and a vinyl acetate-butyl ester copolymer, wherein the solvent is at least one of water and ethanol; and the resin, the solvent and the auxiliary agent are uniformly mixed to obtain Mixing liquid; mixing the mixed liquid and the anti-fungal agent to obtain the anti-mold and fresh-keeping paint;
  • the preparation method of the above-mentioned wrap film is simple, the preparation conditions are easy to control, and the obtained cling film has good reproducibility.
  • the resin in the cling film undergoes a cross-linking reaction to form a network structure, and the anti-fungal agent is dispersed in the network structure of the resin.
  • the obtained mildew-proof fresh-keeping coating has a dense surface and small pores, thereby having a good effect of maintaining a constant moisture; the anti-mold agent is dispersed inside the resin, and can effectively prevent mildew, thereby achieving a better preservation effect.
  • the above-mentioned mildew-proof fresh-keeping paper is particularly suitable for the preservation of fruits, breads and tobacco leaves, such as short storage period, short-term mildew and timely consumption of articles.
  • the step of applying the raw material of the decorative coating to the other surface of the paper base layer and performing heat treatment to form the decorative coating material of the decorative coating layer comprises:
  • Transfer paper comprising an information layer and a resin film layer with the information layer and another surface of the paper base layer and heat-treating, removing the resin film layer to obtain the information layer, and then using the decorative coating material
  • the decorative coating is obtained by coating on the information layer and performing heat treatment.
  • the device for preparing the above-mentioned moldproof and fresh-keeping paper comprises:
  • a mold-proof fresh-keeping coating forming mechanism comprising: a first coating component for coating a mildew-proof fresh-keeping paint; and a first heat-treating component for heat-treating the mold-proof fresh-keeping paint to form the mold-proof fresh-keeping coating;
  • a decorative coating forming mechanism comprising a second coating assembly for coating the raw material of the decorative coating and a second heat treatment assembly for heat treating the decorative coating material to form the decorative coating.
  • the above preparation device has a simple structure, and the conditions for preparing the wrap film are easy to control, and the obtained cling film has good reproducibility.
  • the mold proof coating forming mechanism further includes the first unwinding assembly coupled to the first coating assembly, the first unwinding assembly for using the paper base layer And sequentially transferred to the first coating component and the first heat treatment component;
  • the decorative coating forming mechanism further includes a second unwinding assembly coupled to the second coating assembly, the second unwinding assembly for sequentially transferring the paper substrate to the second coating assembly and The second heat treatment component.
  • the first heat treatment component and/or the second heat treatment component are sequentially provided with a plurality of temperature zones along the conveying direction of the paper substrate.
  • the apparatus for preparing moldproof and fresh-keeping paper further comprises an information layer forming mechanism, and the information layer forming mechanism comprises:
  • An adhesive composite assembly comprising a glued composite component and a transfer paper unwinding assembly coupled to the glued composite component, the transfer paper unwinding component for transferring transfer paper to the glued composite component for gluing;
  • a peeling assembly comprising a peeling and unwinding assembly for peeling and winding a resin film layer of the transfer paper, the paper base layer winding assembly for peeling a resin film
  • the paper base layer of the layer is wound up.
  • Figure 1 is a structural view of a mold proof paper according to an embodiment
  • FIG. 2 is a flow chart of a method for preparing a mildew-proof fresh-keeping paint according to an embodiment
  • FIG. 3 is a flow chart of a method for preparing mold-proof fresh-keeping paper according to an embodiment
  • Figure 4 is a structural view showing an apparatus for preparing mold-proof and fresh-keeping paper according to an embodiment
  • Figure 5 is a structural view of a peeling assembly of the apparatus for preparing mold-proof fresh-keeping paper shown in Figure 1;
  • Fig. 6 is a structural view showing a decorative coating forming mechanism of the apparatus for preparing mold-proof fresh-keeping paper shown in Fig. 1.
  • a mold-proof fresh-keeping paper 10 according to an embodiment of the present invention comprises a paper base layer 11, a decorative coating 12 and a mildew-proof fresh-keeping coating 13.
  • the paper base layer 11 is a paper such as a cardboard, a tissue paper, and a coated paper.
  • the mold proof coating 13 is provided on a surface of the paper base layer 11.
  • the raw material of the mildew-proof fresh-keeping coating 13 is a mildew-proof fresh-keeping paint.
  • the decorative coating 12 is provided on the other surface of the paper base layer 11.
  • the raw material of the decorative coating 12 is 30% to 50% by weight of the decorative coating resin, 10% to 30% of the mica, 20% to 60% of the water, and 0 to 20% of the color ink.
  • the decorative coating resin is at least one of an acrylic resin, a polyurethane and an epoxy resin.
  • the color ink functions as a color adjustment and decoration, and it is also possible to add a color ink and rely on mica to reflect the light to achieve a decorative effect.
  • the mildew proof paper 10 further includes an information layer 14 and a glue layer 15 disposed between the paper base layer 11 and the decorative coating 12.
  • the information layer 14 includes an aluminum plating layer (not shown) and a patterned character layer (not shown) formed on the aluminum plating layer, the adhesive layer 15 is bonded to the paper base layer 11 and the aluminum plating layer, and the decorative coating layer 12 is provided.
  • the pattern text layer can provide information such as a trademark, a production date and the like.
  • the raw material of the adhesive layer may also be a mildew-proof fresh-keeping paint
  • the resin of the mildew-proof fresh-keeping paint is an acrylate copolymer, an ethylene-vinyl acetate copolymer, a polyvinyl acetate. At least one of an ester copolymer and a vinyl acetate-butyl ester copolymer.
  • a glue layer is replaced by a mildew-proof fresh-keeping paint, which not only plays a role of bonding, but also plays a role of preserving and preventing mildew.
  • the mold-preserving coating 13 has a thickness of 0.5 to 6 ⁇ m
  • the decorative coating 12 has a thickness of 1 to 7 ⁇ m. If the thickness of the mildew-proof fresh-keeping coating 13 is insufficient, the resin cannot be effectively formed into a film, and the effect of preventing mildew and fresh-keeping is not reflected.
  • the thickness of the mildew-proof fresh-keeping coating 13 is too thick, not only the cost is increased, but also cannot be completely dried during the heat treatment, and there is a problem of back sticking, etc., and when it is not completely dried, since the outer surface is partially dried, the interior is still formed. In the liquid state, in the process of continuing to air dry, the cracking of the coating is likely to occur due to the natural drying inside, which will greatly reduce the effect of the mold-proof fresh-keeping coating.
  • the thickness of the adhesive layer is from 3 to 8 ⁇ m.
  • the present invention provides an anti-mild and fresh-keeping coating of an embodiment.
  • the mildew-proof fresh-keeping coating comprises the following components in a weight percentage: 20% to 60% of the resin, 30% to 70% of the solvent, 0.5% to 10% of the antifungal agent, and 0.3% to 5% of the auxiliary agent.
  • the resin is polyurethane, acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, ethylene-vinyl acetate copolymer, polyvinyl acetate copolymer and vinyl acetate. At least one of the butyl ester copolymers.
  • a resin is selected from a resin which is compatible with the antifungal agent and is soluble in a water solvent, so that the antifungal agent can be sufficiently dispersed in the resin to ensure the effect of the antifungal agent, and the disadvantage of toxic solvents contaminating the environment can be avoided.
  • the resin is at least one of a polyurethane, an acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, and modified polyvinylidene chloride.
  • the chemical properties of these resins are higher than those of ethylene vinyl acetate.
  • the copolymer, polyvinyl acetate copolymer and vinyl acetate-butyl ester copolymer are more stable, and are more safe for use when the plastic wrap is in contact with food.
  • the resin in the component is a host material, and the resin is a high-performance polymer, which is not mildewed by itself, and the surface of the coating is dense and has no pores, thereby maximally limiting the adsorption of water molecules and Dissolved, and the strong cohesive force between the molecules can inhibit the movement of water molecules in it, thereby effectively inhibiting the ingress and egress of moisture into and out of the coating, thereby preventing the loss of moisture and moisture, maintaining a constant moisture and moisturizing effect.
  • the acrylate-based copolymer is selected from the group consisting of methyl methacrylate-ethyl acrylate-butyl acrylate copolymer, methyl methacrylate-butyl acrylate-acrylic acid copolymer, methyl methacrylate-butyl acrylate- At least one of an acrylic acid-N-methylol acrylamide copolymer.
  • methyl methacrylate-ethyl acrylate-butyl acrylate copolymer it is obtained by copolymerization of three monomers of methyl methacrylate, ethyl acrylate and butyl acrylate.
  • the polyvinyl alcohol is selected from at least one of polyvinyl alcohol 1788, polyvinyl alcohol 2088, and polyvinyl alcohol 2488.
  • Polyvinyl alcohol 1788, polyvinyl alcohol 2088 and polyvinyl alcohol 2488 are all water-soluble polyvinyl alcohols. Taking polyvinyl alcohol 1788 as an example, it is a polyvinyl alcohol having a degree of polymerization of 1,700 and a degree of alcoholysis of 88%.
  • the modified polyvinylidene chloride is at least one selected from the group consisting of acrylate-modified polyvinylidene chloride and urethane-modified polyvinylidene chloride.
  • the water solubility of polyurethane modified polyvinylidene chloride is significantly improved.
  • the solvent is at least one of water and ethanol.
  • a water-soluble resin such as polyurethane, polyvinyl alcohol, ethylene vinyl acetate copolymer or polyvinyl acetate copolymer is used, and the solvent is preferably water to achieve environmental protection and cost reduction.
  • the antifungal agent is at least one of a natural extract antifungal agent and a non-natural extract antifungal agent.
  • the natural extract antifungal agent is selected from the group consisting of gingerol, catechin, citric acid, allicin, chitosan, sorbic acid, turmeric root alcohol, citron essential oil, Mengzong bamboo extract, geranol and lactic acid chain ball At least one of the bacterins.
  • the non-natural extract fungicide is selected from the group consisting of sodium diacetate, potassium sorbate, sodium sorbate, potassium citrate, sodium citrate, calcium propionate, sodium ascorbate, potassium ascorbate, sodium salicylate, and salicylate. At least one of bacteriocin, dodecylalanine, isovitamin C sodium, carson, paraben, fumaric acid, and lysogen.
  • the antifungal agent is a natural extract type fungicide and a non-natural extract type fungicide.
  • the use of the two antifungal agents in this way is advantageous for increasing the amount of the antifungal agent entering the resin, thereby improving the antifungal effect.
  • the antifungal agent is a natural extract antifungal agent and a non-natural extract antifungal agent
  • the mass ratio of the natural extract antifungal agent and the non-natural extract antifungal agent is 0.4 to 1.5. :1.
  • the natural extract antifungal agent has good mildew resistance under alkaline conditions, and the polyurethane itself is weakly alkaline.
  • the resin is an acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, ethylene-vinyl acetate copolymerization Object, gathering In at least one of a vinyl acetate copolymer and a vinyl acetate-butyl ester copolymer
  • the mold-proof fresh-keeping coating further comprises not more than 3% of a neutralizing agent in a weight percentage, and the neutralizing agent is selected from the group consisting of hydrogencarbonate At least one of sodium, triethylamine and aqueous ammonia, the concentration of the aqueous ammonia being not less than 3 mol/L. It will be appreciated that the neutralizing agent can be concentrated aqueous ammonia. It can be understood that the antifungal agent contains a natural extract antifungal agent, and the resin is an
  • the auxiliary agent includes at least one of a surfactant, an emulsifier, a wetting agent, an antifoaming agent, and an anti-settling agent.
  • the surfactant is Tween and Span, and the surfactant can make the antifungal agent more uniformly dispersed in the resin.
  • the emulsifier is advantageous for promoting the formation of a stable aqueous emulsion of a poorly water-soluble resin.
  • the resin is dissolved in a solvent and the film forming property is adjusted by an auxiliary agent, and the distribution ratio of the control group is controlled to form a surface-dense, non-porous coating, thereby maximally limiting the adsorption of water molecules and Dissolving, and the cohesive force between the polymers can inhibit the movement of water molecules therein, thereby effectively inhibiting the ingress and egress of moisture into and out of the coating to achieve a constant moisture retention and moisturizing effect.
  • the anti-fungal agent can enter the cell through the cell membrane of the microorganism to destroy the microorganism or prevent it from germinating to prevent mold growth, thereby achieving a long-term stable preservation effect.
  • a method for preparing the above-mentioned mildew-proof fresh-keeping paint of the present invention comprises the following steps.
  • Step S110 providing a raw material, which comprises 20% to 60% by weight of the resin, 30% to 70% of the solvent, 0.5% to 10% of the antifungal agent, and 0.3% to 5% of the auxiliary agent.
  • Step S120 mixing the resin, the solvent and the auxiliary agent uniformly to obtain a mixed liquid.
  • the temperature at which the resin, the solvent and the auxiliary agent are mixed in the step S120 is 30 to 65 °C.
  • the step S120 includes the steps of dissolving the resin in a solvent, stirring at a rotation speed of 100 to 300 rpm and heating to 30 to 65 ° C; adding an auxiliary agent, continuing at a rotation speed of 200 to 400 rpm. Stir for 30 to 60 minutes to obtain a mixed solution.
  • the temperature and stirring intensity are controlled in such a way that the mixture is uniformly mixed.
  • the antifungal fresh-keeping paint further comprises not more than 3% of the neutralizing agent by weight
  • the step S120 further comprises the step of: adding the mixed liquid and adding the medium
  • the agent is used to adjust the pH of the mixture to 7-8.
  • Adding a neutralizing agent to adjust the pH of the mixture is to control the pH of the system, so that the pH of the system is as close as possible to the neutrality so that the pH of the coating is close to neutral, thereby improving its environmental friendliness.
  • Step S130 mixing the mixed solution and the anti-mold agent to obtain a mildew-proof fresh-keeping paint.
  • the agent is dissolved in water in a free state, so that the effective content of the antifungal agent is lowered when the coating is formed, thereby reducing the problem of the antifungal effect.
  • the antifungal agent enters the cell through the cell membrane of the microorganism to destroy the microorganism or prevent it from germinating to prevent the growth of the mold, thereby achieving a long-term stable preservation effect.
  • the anti-fungal agent is added to the mixed solution in a dropping manner to be mixed with the mixed liquid, so that the anti-fungal agent is more fully dispersed in the resin, and the anti-fungal agent is prevented from being freed in the solvent as much as possible, thereby improving the anti-fungal agent.
  • Effective content More preferably, when the antifungal agent is a natural extract antifungal agent and a non-natural extract antifungal agent, the two antifungal agents are separately and simultaneously added to the mixed solution to prevent the two kinds.
  • the addition of the anti-mold agent to the solvent causes the latter anti-mold agent to be present in the solvent in a free state, so that the problem of a better bonding effect cannot be achieved.
  • the conditions for mixing the mixed solution and the anti-mold agent in step S130 are mixed at 30 to 65 ° C for 1 to 2 h. It can be understood that when the antifungal agent is added by dropping, after the end of the antifungal agent is added, the mixed solution and the antifungal agent are continuously mixed for 1 to 2 hours. Step S130 is stirred and mixed at a number of revolutions of 500 to 800 rpm.
  • the preparation method of the above-mentioned mildew-proof fresh-keeping paint has the advantages of simple process and easy realization, and the obtained mold-preserving and fresh-keeping paint has good film forming property, and can form a surface-tight and non-porous anti-mold and fresh-keeping coating, thereby maximally limiting the adsorption of water molecules. And dissolve, and the cohesive force between the polymers can inhibit the movement of water molecules therein, thereby effectively inhibiting the ingress and egress of moisture into and out of the coating, thereby achieving a constant moisture retention and moisturizing effect.
  • the resin and the anti-fungal agent have good mutual solubility, so that the anti-fungal agent is sufficiently dispersed in the resin, and the anti-fungal agent is uniformly dispersed in the resin, and the anti-fungal agent is prevented from being dissolved in water in a free state to cause a decrease in the anti-mold agent content when the coating is formed. Further, the problem of the anti-mildew effect is reduced.
  • the antifungal agent enters the cell through the cell membrane of the microorganism to destroy the microorganism or prevent it from germinating to prevent the growth of the mold, thereby achieving a long-term stable preservation effect.
  • the mildew-proof fresh-keeping coating is particularly suitable for the preservation of fruits, breads and tobacco leaves, such as short storage period, short-term mildew and timely consumption of articles.
  • the mildew-proof fresh-keeping paper 10 has a mildew-proof fresh-keeping coating 13 which is heat-treated by a mildew-proof fresh-keeping coating, so that the resin undergoes a cross-linking reaction to form a network structure, and the mold-preventing agent is dispersed in the network structure of the resin.
  • the obtained mildew-proof fresh-keeping coating 13 has a dense surface and small pores, and thus has a good effect of maintaining a constant moisture; the anti-mold agent is dispersed inside the resin, and can effectively prevent mildew, thereby achieving better preservation effect.
  • the above-mentioned mildewproof and fresh-keeping paper 10 is particularly suitable for the preservation of fruits, breads and tobacco leaves, such as short storage period, short-term mildew and timely consumption of articles.
  • the mold proof paper 10 is coated with mildew proof when in use.
  • the surface of the fresh coating layer 13 serves as an inner surface, which promotes the contact between the mildew-proof fresh-keeping coating 13 and the fresh-keeping articles in the mildew-proof fresh-keeping paper 10, thereby improving the fresh-keeping effect.
  • the present invention also provides a method for preparing mold-proof fresh-keeping paper according to an embodiment, comprising the following steps.
  • Step S210 preparing a moldproof fresh-keeping paint. The specific preparation steps are not described in detail herein.
  • Step S220 applying the mildew-proof fresh-keeping paint to a surface of the paper base layer and performing heat treatment to form the mold-proof fresh-keeping paint to form a mold-proof fresh-keeping coating.
  • the coating amount of the mildew-proof fresh-keeping coating applied to the paper base layer is 1 to 10 g/m 2 , that is, the coating amount of the mildew-proof fresh-keeping paint on the basis area of the paper base layer, thereby controlling the thickness of the mildew-proof fresh-keeping coating layer. .
  • Step S230 The transfer paper including the information layer and the resin film layer is adhered to the other surface of the paper base layer by an information layer and heat-treated, and the resin film layer is removed to obtain an information layer.
  • Step S240 coating the raw material of the decorative coating on the information layer and performing heat treatment to form a decorative coating on the raw material of the decorative coating to obtain mildew proof paper.
  • the raw material of the decorative coating is applied to the paper base layer in an amount of 5 to 20 g/m 2 , that is, the coating amount of the raw material of the decorative coating on the basis area of the paper base layer.
  • step S230 can be omitted, that is, when the mold-proof fresh-keeping paper containing no information layer is prepared, step S240 directly applies the raw material of the decorative coating to a surface of the paper base layer and heat-treates to make the decoration.
  • the raw materials of the coating form a decorative coating to obtain mildew proof paper.
  • step S220 can also be performed after step S240.
  • step S220, step S230 and step S240 are all treated at 80 to 120 ° C for 5 to 10 s.
  • the resin in the mildew-preserving coating undergoes a crosslinking reaction under such conditions to form a dense network structure, so that the coating has an effect of preventing moisture from entering and leaving. Due to the limited thickness of the coating, the heat treatment time is too long and will affect the performance of the coating. Under this condition, the adhesively bonded information layer is heat-treated and dried to make the adhesive connection more firm.
  • the conditions of the heat treatment in step S220, step S230, and step S240 are respectively performed at 80 to 85 ° C, 90 to 100 ° C, 105 to 120 ° C, 90 to 100 ° C, and 80 to 85 ° C for 1 to 2 s.
  • the mildew-proof fresh-keeping paint is heat-treated in the temperature region, and the temperature region is in a gradient distribution, so that the mildew-proof fresh-keeping paint gradually heats up in the early stage of film formation, gradually lowers the temperature in the late film formation, thereby improving the compactness of the mildew-proof fresh-keeping coating and ensuring the coating. Will not crack.
  • the specific method for performing the heat treatment is to sequentially pass the object to be treated through a temperature range of 80 to 85 ° C, 90 to 100 ° C, 105 to 120 ° C, 90 to 100 ° C, and 80 to 85 ° C at a certain speed, and pass the control.
  • the distance and speed of each temperature zone to control the time of the heat treatment. In this way, the time of the heat treatment can be precisely controlled, and the problem that the heat treatment time is not well controlled during the repeated heating and cooling processes is avoided.
  • the conditions of the heat treatment in step S220 are respectively treated at 80 ° C, 90 ° C, 120 ° C, 100 ° C and 85 ° C for 1.2 s.
  • the conditions of the heat treatment in the step S230 were respectively treated at 80 ° C, 90 ° C, 110 ° C, 100 ° C and 80 ° C for 1.2 s.
  • the conditions of the heat treatment in the step S240 were respectively treated at 85 ° C, 90 ° C, 105 ° C, 90 ° C and 85 ° C for 1.2 s.
  • the preparation method of the above-mentioned wrap film is simple, the preparation conditions are easy to control, and the obtained cling film has good reproducibility.
  • the resin in the cling film undergoes a cross-linking reaction to form a network structure, and the anti-fungal agent is dispersed in the network structure of the resin.
  • the obtained mildew-proof fresh-keeping coating has a dense surface and small pores, thereby having a good effect of maintaining a constant moisture; the anti-mold agent is dispersed inside the resin, and can effectively prevent mildew, thereby achieving a better preservation effect.
  • the above-mentioned mildew-proof fresh-keeping paper is particularly suitable for the preservation of fruits, breads and tobacco leaves, such as short storage period, short-term mildew and timely consumption of articles.
  • the present invention further provides an apparatus 20 for preparing a mold-proof and fresh-keeping paper, comprising a mold-proof fresh-keeping coating forming mechanism 21, an information layer forming mechanism 22, and a decorative coating forming mechanism 23.
  • the mold-proof fresh-keeping coating forming mechanism 21 includes a first coating assembly 211 for coating a mildew-proof fresh-keeping paint, and a first heat treatment for heat-treating the mildew-proof fresh-keeping paint to obtain a mildew-proof fresh-keeping coating.
  • the assembly 212 and the first unwinding assembly 213 coupled to the first coating assembly 211.
  • the first unwinding assembly 213 is used to sequentially transfer the paper substrate to the first coating assembly 211 and the first heat treatment assembly 212 to coat the mold proof coating and form the mold proof coating. It will be appreciated that the first unwinding assembly 213 may be omitted in other embodiments.
  • the first coating assembly 211 is an anilox roll press coating assembly. More preferably, the anilox roll is an electric engraving roll. More specifically, the anilox roll is a 68 ⁇ electric engraving roll, that is, the anilox roll has a textured depth of 68 ⁇ m.
  • the first heat treatment component 212 is sequentially provided with a plurality of temperature zones along the direction in which the first unwinding component 213 conveys the paper base layer, so that the paper base layer sequentially passes through the respective temperature zones at a specific speed.
  • the plurality of temperature regions are sequentially 80 to 85 ° C, 90 to 100 ° C, 105 to 120 ° C, 90 to 100 ° C in the conveying direction of the paper base layer. 80 ⁇ 85 ° C. More preferably, the speed at which the first unwinding unit 213 transports the paper base layer is 2.5 m/s, and the length of each temperature region in the direction in which the first unwinding unit 213 transports the paper base layer is 3 m.
  • the information layer forming mechanism 22 includes an adhesive composite component 221, a third heat treatment component 222, and a peeling component 223.
  • the adhesive composite component 221 includes a glued composite component 2211 and a transfer paper unwinding component 2212 coupled to the glued composite component 2211.
  • the transfer paper unwinding component 2212 is used to transfer the transfer paper to the glued composite component 2211 for glue stick.
  • the third heat treatment component 222 is used to heat-treat the glued paper base layer.
  • the glue-coated composite component 2211 is a contact-type reverse coating roller.
  • the preparation device 20 for moldproof and fresh-keeping paper further includes a guide roller 24, and the glue-coated composite component 2211 is connected to the first heat-treated component 212 through the guide roller 24.
  • the glue-coated composite component 2211 and the first heat-treated component 212 can also be separately disposed, that is, the mold-free fresh-keeping coating does not have to be formed first to form an information layer, and information can be formed on the paper base layer first. The layer is then formed into a mildew-proof and fresh-keeping coating.
  • the preparation device 20 for moldproof and fresh-keeping paper further comprises a first winding assembly 25, and the first winding assembly 25 is connected with the third heat treatment assembly 222, so that the first winding assembly 25 will pass through.
  • Adhesive and heat treated paper substrate rewinding It can be understood that in other embodiments, such as the connection of the third heat treatment component 222 and the stripping component 223, the first winder assembly 25 can be omitted.
  • the third heat treatment component 222 is sequentially provided with a plurality of temperature zones along the conveying direction of the paper base layer, so that the paper base layer sequentially passes through the respective temperature zones at a specific speed. More preferably, the paper base layer has a conveying speed of 2.5 m/s, and the length of each temperature region in the conveying direction of the paper base layer is 3 m.
  • the peeling assembly 223 includes a second unwinding assembly 2231, a peeling and winding assembly 2232, and a paper substrate winding assembly 2233.
  • the second unwinding assembly 2231 is for unwinding the product wound by the first winding assembly 25, and the peeling and winding assembly 2232 is used for peeling and winding the resin film layer of the transfer paper, and the paper base winding assembly 2233 is used for The paper base layer of the resin film layer is peeled off. It can be understood that in other embodiments, such as the connection of the third heat treatment component 222 and the peeling component 223, the second unwinding component 2231 can be omitted.
  • the decorative coating forming mechanism 23 includes a second coating assembly 231 for coating the decorative coating material, a second heat treatment for heat treating the decorative coating material to form a decorative coating.
  • the assembly 232 a third unwinding assembly 233 coupled to the second coating assembly 231, and a second winding assembly 234 coupled to the second thermal processing assembly 232.
  • the third unwinding assembly 233 is used to sequentially transfer the paper substrate to the second coating assembly 231 and the second thermal processing assembly 232 to coat the decorative coating material and form a decorative coating.
  • the second winding assembly 234 is for winding the paper substrate treated by the second heat treatment assembly 232. It will be appreciated that in other embodiments the third unwinding assembly 233 and the second winding assembly 234 may be omitted.
  • the second coating assembly 231 is a dimple roll coating assembly.
  • the micro-concave roll coating assembly allows the coating of the decorative coating to be more complete and uniform.
  • the second heat treatment component 232 is sequentially provided with a plurality of temperature zones along the conveying direction of the paper base layer, so that the paper base layer sequentially passes through the respective temperature zones at a specific speed. More preferably, the paper base layer has a conveying speed of 2.5 m/s, and the length of each temperature region in the conveying direction of the paper base layer is 3 m.
  • all of the winding assembly and the unwinding assembly are rollers, and all of the heat treatment components are ovens. It will be appreciated that in other embodiments, other components may be substituted.
  • the preparation device 20 has a simple structure, and the conditions for preparing the wrap film are easy to control, and the obtained cling film has good reproducibility.
  • the raw materials are provided in a weight percentage including: polyurethane resin 60%, water 30%, gingerol 5%, and Tween 4%.
  • the polyurethane resin was dissolved in water, stirred at 300 rpm and heated to 50 ° C; an auxiliary was added, and stirring was continued for 50 min at 300 rpm to obtain a mixed solution.
  • the pH of the mixture after adding triethylamine was 7.
  • Gingerol was added to the mixture by stirring at a rotation speed of 600 rpm, and after the addition of the gingerol was completed, the mixture and the gingerol were continuously stirred and mixed at a rotation speed of 600 rpm. Cool down and get anti-mold and fresh-keeping paint.
  • the mildew-proof fresh-keeping paint is applied to a surface of the paper base layer at a coating amount of 10 g/m 2 and sequentially treated at 80 ° C, 90 ° C, 120 ° C, 100 ° C, and 85 ° C for 1.2 s, respectively.
  • Obtaining a mildew-proof fresh-keeping coating transferring the transfer paper including the information layer and the resin film layer with the information layer and the paper base layer, and sequentially treating the strips at 80 ° C, 90 ° C, 120 ° C, 100 ° C, and 85 ° C for 1.2 s, respectively,
  • the resin film layer obtained the information layer; the raw material composed of 50 wt% varnish and 50% anti-mold fresh-keeping paint was applied on the information layer at a coating amount of 10 g/m 2 and sequentially at 80 ° C, 90 ° C, 120 ° C, 100 Treated at °C and 85 °C for 1.2 s to form a decorative coating to obtain mildew proof paper.
  • the raw materials are provided in a percentage by weight: polyvinyl alcohol 2488 resin 47%, water 40%, sorbic acid and turmeric root alcohol total 8%, Tween 2% and sodium hydrogencarbonate 3%.
  • the polyvinyl alcohol 2488 resin was dissolved in water, stirred at a rotation speed of 100 rpm and heated to 65 ° C; an auxiliary was added, and stirring was continued for 30 minutes at a rotation speed of 200 rpm to obtain a mixed solution.
  • the pH of the mixture after adding sodium hydrogencarbonate was 8.
  • the sorbic acid and turmeric root alcohol were added to the mixture by stirring at 800 rpm, and the mixture, sorbic acid and turmeric root alcohol were continuously added at a rotation speed. Stir and mix for 2 h at 500-800 rpm. Cool down and get anti-mold and fresh-keeping paint.
  • the mildew-proof fresh-keeping paint is applied to a surface of the paper base layer at a coating amount of 1 g/m 2 and sequentially treated at 85 ° C, 95 ° C, 110 ° C, 90 ° C, and 80 ° C for 2 s, respectively.
  • Anti-mold coating; the transfer paper comprising the information layer and the resin film layer is adhered to the paper substrate by the information layer and sequentially treated at 85 ° C, 95 ° C, 110 ° C, 90 ° C and 80 ° C for 2 s to remove the resin film.
  • the raw materials are provided in a weight percentage including: polyurethane modified polyvinylidene chloride resin 20%, water 70%, dodecylalanine 0.5%, and Tween 5%.
  • the polyurethane modified polyvinylidene chloride resin was dissolved in water, stirred at 200 rpm and heated to 60 ° C; an auxiliary was added, and stirring was continued for 50 min at a rotation speed of 400 rpm to obtain a mixed solution.
  • the mildew-proof fresh-keeping paint is applied to a surface of the paper base layer at a coating amount of 5 g/m 2 and sequentially treated at 83 ° C, 100 ° C, 105 ° C, 95 ° C, and 82 ° C for 1 s, respectively.
  • Anti-mold coating; the transfer paper comprising the information layer and the resin film layer is adhered to the paper substrate by the information layer and sequentially treated at 85 ° C, 95 ° C, 110 ° C, 90 ° C and 80 ° C for 2 s to remove the resin film.
  • the raw materials are provided in the weight percentage including: vinyl acetate-butyl ester copolymer 40%, water and ethanol (volume ratio 1:1) total 48%, Mengzong bamboo extract and isovitamin C sodium (Meng Zongzhu extract and different The mass ratio of vitamin C sodium is 1:1) total 10%, Span 1.5% and concentrated ammonia 0.4%.
  • the vinyl acetate-butyl ester copolymer was dissolved in water, stirred at 300 rpm and heated to 40 ° C; an auxiliary was added, and stirring was continued for 50 min at 300 rpm to obtain a mixed solution.
  • the pH of the mixture after the addition of concentrated aqueous ammonia was 7.5.
  • the Mengzong bamboo extract and the isovitamin C sodium were separately and simultaneously added to the mixture by stirring at a rotation speed of 800 rpm. After the addition of the anti-fungal agent, the mixture, Mengzong bamboo extract and iso-vitamin C sodium were mixed. Continue mixing at a speed of 800 rpm for 2 h. Cool down and get anti-mold and fresh-keeping paint.
  • the mildew-proof fresh-keeping paint is applied to a surface of the paper base layer at a coating amount of 8 g/m 2 and sequentially treated at 90 ° C for 10 s to obtain a mildew-proof fresh-keeping coating; and 100% anti-mold fresh-keeping paint is composed.
  • the raw materials were coated on the information layer at a coating amount of 8 g/m 2 and sequentially treated at 90 ° C for 10 s to form a decorative coating to obtain mildew proof paper.
  • Example 5 is substantially the same as Example 4, except that the antifungal agent of Example 5 is replaced by berberol and potassium ascorbate, and the mass ratio of geranol to potassium ascorbate is 0.428:1; the condition of heat treatment is 120. °C treatment for 5s.
  • Example 6 is basically the same as Example 4, except that the antifungal agent of Example 6 is replaced with berberol and potassium ascorbate, and the mass ratio of cedarol and potassium ascorbate is 0.67:1; For 8 s at 80 °C.
  • Example 7 was basically the same as Example 4 except that the antifungal agent of Example 7 was replaced with allicin and salicylamine, and the mass ratio of allicin to salicylamine was 1.5:1.

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Abstract

一种防霉保鲜纸，包括纸基层、装饰涂层和防霉保鲜涂层，防霉保鲜涂层的原料为防霉保鲜涂料；防霉保鲜涂料按重量百分含量包括如下组分：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％。该防霉保鲜纸的制备方法为制备该防霉保鲜涂料，将该防霉保鲜涂料涂覆于纸基层的一表面并进行热处理使该防霉保鲜涂料形成防霉保鲜涂层，将装饰涂层的原料涂覆于所述纸基层的另一表面并进行热处理使该装饰涂层的原料形成装饰涂层，得到该防霉保鲜纸。及制备该防霉保鲜纸的制备装置，包括防霉保鲜涂层形成机构和装饰涂层形成机构。

Description

防霉保鲜纸及其制备方法和制备装置 技术领域
本发明涉及包装技术领域，特别是涉及一种防霉保鲜纸及其制备方法和制备装置。
背景技术
常用的包装材料有塑料材质、纸质等其他材质，其中纸质材料的包装由于其环保性和优良的质感使用普遍。然而纸质材料的包装用于水果、面包和烟叶等储存期较短、易短时霉变和需及时食用的物品时，不能起到较好的保持水分恒定且能防止霉变的作用，进而无法起到保鲜作用。
发明内容
基于此，有必要提供一种保持水分恒定且能防止霉变的防霉保鲜纸及其制备方法和制备装置。
一种防霉保鲜纸，包括纸基层、装饰涂层和防霉保鲜涂层，所述防霉保鲜涂层设于所述纸基层的一表面，所述装饰涂层设于所述纸基层的另一表面，所述防霉保鲜涂层的原料为防霉保鲜涂料；
其中，所述防霉保鲜涂料按重量百分含量包括如下组分：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％，其中所述树脂为聚氨酯、丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯、改性聚偏二氯乙烯、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种，所述溶剂为水和乙醇中的至少一种。
上述防霉保鲜纸，其防霉保鲜涂层由防霉保鲜涂料经热处理，使得树脂发生交联反应形成网状结构，防霉剂分散于树脂的网状结构中。得到的防霉保鲜涂层，其表面致密，孔隙小，因而具有较好的保持水分恒定的效果；防霉剂分散在树脂内部，还能有效防止霉变，进而达到较好的保鲜效果。上述防霉保鲜 纸特别适用于水果、面包和烟叶等储存期较短、易短时霉变和需及时食用物品的保鲜。
在其中一个实施例中，所述装饰涂层的原料按重量百分含量计包括装饰涂层树脂30％～50％、云母10％～30％、水20％～60％及色墨0～20％；其中所述装饰涂层树脂为丙烯酸树脂、聚氨酯和环氧树脂中的至少一种。
在其中一个实施例中，所述防霉保鲜纸还包括设于所述纸基层和所述装饰涂层之间的信息层和胶层，所述信息层包括镀铝层及形成于镀铝层上的图案文字层，所述胶层粘结所述纸基层与所述镀铝层，所述装饰涂层设于所述图案文字层上。
一种防霉保鲜纸的制备方法，包括以下步骤：
制备防霉保鲜涂料；所述防霉保鲜涂料的制备包括如下步骤：提供原料，按重量百分含量包括：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％；其中所述树脂为聚氨酯、丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯、改性聚偏二氯乙烯、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种，所述溶剂为水和乙醇中的至少一种；将所述树脂、所述溶剂和所述助剂混合均匀，得到混合液；将所述混合液和所述防霉剂混合均匀，得到所述防霉保鲜涂料；
将所述防霉保鲜涂料涂覆于纸基层的一表面并进行热处理使所述防霉保鲜涂料形成防霉保鲜涂层，将装饰涂层的原料涂覆于所述纸基层的另一表面并进行热处理使所述装饰涂层的原料形成装饰涂层，得到所述防霉保鲜纸。
上述保鲜膜的制备方法简单，制备条件易于控制，得到的保鲜膜重现性好。保鲜膜中树脂发生交联反应形成网状结构，防霉剂分散于树脂的网状结构中。得到的防霉保鲜涂层，其表面致密，孔隙小，因而具有较好的保持水分恒定的效果；防霉剂分散在树脂内部，还能有效防止霉变，进而达到较好的保鲜效果。上述防霉保鲜纸特别适用于水果、面包和烟叶等储存期较短、易短时霉变和需及时食用物品的保鲜。
在其中一个实施例中，将装饰涂层的原料涂覆于所述纸基层的另一表面并进行热处理使所述装饰涂层的原料形成装饰涂层的步骤具体包括：
将包括信息层和树脂薄膜层的转移纸以所述信息层与所述纸基层的另一表面胶粘并进行热处理，除去所述树脂薄膜层得到所述信息层，然后将装饰涂层的原料涂覆于所述信息层上并进行热处理得到所述装饰涂层。
上述防霉保鲜纸的制备装置，包括：
防霉保鲜涂层形成机构，包括用于涂覆防霉保鲜涂料的第一涂覆组件和用于对所述防霉保鲜涂料进行热处理以形成所述防霉保鲜涂层的第一热处理组件；
装饰涂层形成机构，包括用于涂覆所述装饰涂层的原料的第二涂覆组件和用于对所述装饰涂层的原料进行热处理以形成所述装饰涂层的第二热处理组件。
上述制备装置，结构简单，制备保鲜膜的条件易于控制，得到的保鲜膜重现性好。
在其中一个实施例中，所述防霉保鲜涂层形成机构还包括与所述第一涂覆组件连接的所述第一放卷组件，所述第一放卷组件用于将所述纸基层依次传送至所述第一涂覆组件和所述第一热处理组件；
所述装饰涂层形成机构还包括与所述第二涂覆组件连接的第二放卷组件，所述第二放卷组件用于将所述纸基层依次传送至所述第二涂覆组件和所述第二热处理组件。
在其中一个实施例中，所述第一热处理组件和/或所述第二热处理组件沿所述纸基层的传送方向依次设有多个温度区域。
在其中一个实施例中，所述防霉保鲜纸的制备装置还包括信息层形成机构，所述信息层形成机构包括：
胶粘复合组件，包括涂胶复合组件及与所述涂胶复合组件连接的转移纸放卷组件，所述转移纸放卷组件用于将转移纸传送至所述涂胶复合组件进行胶粘；
第三热处理组件，用于将胶粘后的纸基层进行热处理烘干；及
剥离组件，包括剥离收卷组件和纸基层收卷组件，所述剥离收卷组件用于将所述转移纸的树脂薄膜层经剥离收卷，所述纸基层收卷组件用于将剥离树脂薄膜层的纸基层收卷。
附图说明
图1为一实施例的防霉保鲜纸的结构图；
图2为一实施例的防霉保鲜涂料的制备方法的流程图；
图3为一实施例的防霉保鲜纸的制备方法的流程图；
图4为一实施例的防霉保鲜纸的制备装置的结构图；
图5为图1所示防霉保鲜纸的制备装置的剥离组件的结构图；
图6为图1所示防霉保鲜纸的制备装置的装饰涂层形成机构的结构图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳的实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
参照图1，本发明一实施例的防霉保鲜纸10，包括纸基层11、装饰涂层12和防霉保鲜涂层13。
可以理解，纸基层11为卡纸、薄纸和铜版纸等纸类。
防霉保鲜涂层13设于纸基层11的一表面。防霉保鲜涂层13的原料为防霉保鲜涂料。
装饰涂层12设于纸基层11的另一表面。优选的，装饰涂层12的原料按重量百分含量计防霉保鲜涂料包括装饰涂层树脂30％～50％、云母10％～30％、水20％～60％及色墨0～20％。其中所述装饰涂层树脂为丙烯酸树脂、聚氨酯和环氧树脂中的至少一种。具体的，色墨起到颜色调节和装饰作用，也可以不添加色墨，依靠云母对光的反射达到装饰效果。优选的，防霉保鲜纸10还包括设于纸基层11和装饰涂层12之间的信息层14和胶层15。具体的，信息层14包括镀铝层(图未示)及形成于镀铝层上的图案文字层(图未示)，胶层15粘结纸基层11和镀铝层，装饰涂层12设于图案文字层上。其中，所述图案文字层可提供商标、生产日期等信息。
优选的，在其中一个实施例中，所述胶层的原料也可为防霉保鲜涂料，且防霉保鲜涂料的树脂为丙烯酸酯类共聚物、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种。如此胶层采用防霉保鲜涂料替代，不仅可起到粘结的作用，还可起到保鲜防霉的作用。优选的，防霉保鲜涂层13的厚度为0.5～6μm，装饰涂层12的厚度为1～7μm。防霉保鲜涂层13的厚度不够则树脂不能有效成膜，则防霉保鲜的效果不能体现。而防霉保鲜涂层13的厚度过厚，不仅成本增加，而且在热处理时不能完全干燥，会出现返粘等不良现象，且在未完全干燥时，由于外表面已部分干燥，而内部仍成液态，在继续风干的过程中，由于内部自然干燥的原因很容易出现涂层开裂的情况，这也会极大的降低防霉保鲜涂层的效果。
更优选的，胶层的厚度为3～8μm。
本发明提供了一实施例的防霉保鲜涂料。
所述防霉保鲜涂料，按重量百分含量包括如下组分：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％。
其中所述树脂为聚氨酯、丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯、改性聚偏二氯乙烯、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种。如此树脂选用与防霉剂互溶性好且能溶于水溶剂的树脂，不仅可使防霉剂充分分散在树脂中，保证防霉剂的效果，而且还可避免有毒溶剂污染环境的缺点。
更优选的，所述树脂为聚氨酯、丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯和改性聚偏二氯乙烯中的至少一种，这些树脂化学性质较乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物更稳定，其用于保鲜膜与食品接触时，更具有安全保障。
所述组分中树脂为主体材料，所述树脂均为性能良好的高聚物，本身不会霉变，制成的涂层表面致密，无孔隙，因而能够最大限度的限制水分子的吸附和溶解，而分子间强大的凝聚力能够抑制水分子在其中移动，进而有效的抑制水分进出涂层，达到防止丢失水分和吸收水分、保持水分恒定和保鲜保湿的效果。
优选的，丙烯酸酯类共聚物选自甲基丙烯酸甲酯-丙烯酸乙酯-丙烯酸丁酯共聚物、甲基丙烯酸甲酯-丙烯酸丁酯-丙烯酸共聚物、甲基丙烯酸甲酯-丙烯酸丁酯-丙烯酸-N-羟甲基丙烯酰胺共聚物中的至少一种。以甲基丙烯酸甲酯-丙烯酸乙酯-丙烯酸丁酯共聚物为例，其由甲基丙烯酸甲酯、丙烯酸乙酯和丙烯酸丁酯三种单体共聚而成。
优选的，聚乙烯醇选自聚乙烯醇1788、聚乙烯醇2088和聚乙烯醇2488中的至少一种。聚乙烯醇1788、聚乙烯醇2088和聚乙烯醇2488均是水溶性很好的聚乙烯醇。以聚乙烯醇1788为例，其为聚合度为1700，醇解度为88％的聚乙烯醇。
优选的，改性聚偏二氯乙烯选自丙烯酸酯改性聚偏二氯乙烯和聚氨酯改性聚偏二氯乙烯中的至少一种。聚氨酯改性聚偏二氯乙烯的水溶性能显著提升。
其中，溶剂为水和乙醇中的至少一种。采用聚氨酯、聚乙烯醇、乙烯醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物等水溶性较好的树脂，溶剂优选为水，以达到环保和降低成本的作用。
其中，防霉剂为天然提取物类防霉剂和非天然提取物类防霉剂中的至少一种。优选的，天然提取物类防霉剂选自姜辣素、儿茶素、柠檬酸、大蒜素、壳聚糖、山梨酸、姜黄根醇、香樟精油、孟宗竹提取物、日柏醇和乳酸链球菌素中的至少一种。优选的，非天然提取物类防霉剂选自双乙酸钠、山梨酸钾、山梨酸钠、柠檬酸钾、柠檬酸钠、丙酸钙、抗坏血酸钠、抗坏血酸钾、水杨酸钠、水杨菌胺、十二烷基丙氨酸、异维生素C钠、卡松、尼泊金酯、富马酸和溶菌霉中的至少一种。
优选的，防霉剂为天然提取物类防霉剂和非天然提取物类防霉剂两种。如此采用两种防霉剂有利于提高进入树脂中的防霉剂含量，进而提高防霉效果。优选的，防霉剂为天然提取物类防霉剂和非天然提取物类防霉剂两种时，天然提取物类防霉剂和非天然提取物类防霉剂的质量比为0.4～1.5:1。
天然提取物类防霉剂在碱性条件下的防霉性能较好，而聚氨酯本身为弱碱性。优选的，防霉剂含有天然提取物类防霉剂时，且树脂为丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯、改性聚偏二氯乙烯、乙烯-醋酸乙烯酯类共聚物、聚 醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种时，防霉保鲜涂料按重量百分含量还包括不超过3％的中和剂，所述中和剂选自碳酸氢钠、三乙胺和氨水中的至少一种，所述氨水的浓度不低于3mol/L。可以理解，中和剂可为浓氨水。可以理解，防霉剂为非天然提取物类防霉剂，也可添加中和剂。
优选的，助剂包括表面活性剂、乳化剂、润湿剂、消泡剂及防沉降剂中的至少一种。其中，表面活性剂为吐温和司盘等，表面活性剂可使防霉剂在树脂中分散更加均匀。乳化剂有利于促进水溶性较差的树脂形成稳定的水乳液。
上述防霉保鲜涂料，树脂溶于溶剂中并通过助剂调节其成膜性，控制组分配比，使其能形成表面致密、无孔隙的涂层，因此能够最大限度的限制水分子的吸附和溶解，而高分子间的凝聚力能够抑制水分子在其中的移动，进而有效的抑制水分进出涂层，达到保持水分恒定和保鲜保湿的效果。此外，防霉剂能通过微生物的细胞膜进入细胞内进而消灭微生物或者阻止其发芽以防止霉菌生长，进而达到长期稳定的保鲜效果。
参照图2，本发明上述防霉保鲜涂料的制备方法，包括以下步骤。
步骤S110：提供原料，按重量百分含量包括：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％。
步骤S120：将树脂、溶剂和助剂混合均匀，得到混合液。
具体的，步骤S120中树脂、溶剂和助剂混合的温度为30～65℃。
具体的，步骤S120包括以下步骤：将树脂溶于溶剂中，在转速为100～300转/分钟下搅拌并加热至30～65℃；加入助剂，在转速为200～400转/分钟下继续搅拌30～60min，得到混合液。如此控制温度和搅拌强度，促使混合液混合均匀。
具体的，防霉剂含有天然提取物类防霉剂时，防霉保鲜涂料按重量百分含量还包括不超过3％的中和剂，步骤S120还包括步骤：得到混合液后加入所述中和剂以调节混合液的pH值为7～8。加入中和剂调节混合液的pH是为了控制体系的酸碱度，使得体系的酸碱度尽量接近中性以使涂料的酸碱度接近中性，进而提高其环保性。
步骤S130：将混合液和防霉剂混合均匀，得到防霉保鲜涂料。
将混合液和防霉剂混合均匀，使得防霉剂均匀分散在树脂内部，避免防霉 剂以游离态溶于水中导致形成涂层时防霉剂的有效含量下降进而降低防霉效果的问题。防霉剂通过微生物的细胞膜进入细胞内进而消灭微生物或者阻止其发芽以防止霉菌生长，进而达到长期稳定的保鲜效果。
优选的，防霉剂以滴加方式加入混合液以与混合液混合，以使防霉剂更充分的分散在树脂中，而尽可能的避免防霉剂游离在溶剂中，进而提高防霉剂的有效含量。更优选的，防霉剂为天然提取物类防霉剂和非天然提取物类防霉剂两种时，将该两种防霉剂单独且同时滴加至混合液中，以防止该两种防霉剂先后加入导致后者防霉剂更多的以游离态存在于溶剂中，致使不能达到较好的结合效果的问题。
优选的，步骤S130中混合液和防霉剂混合的条件为于30～65℃下混合1～2h。可以理解，防霉剂以滴加方式加入时，在防霉剂滴加结束后，将混合液和防霉剂继续混合1～2h。步骤S130在转速为500～800转/分钟下搅拌混合。
上述防霉保鲜涂料的制备方法，工艺简单，易于实现，得到的防霉保鲜涂料成膜性好，可形成表面致密、无孔隙的防霉保鲜涂层，因而能够最大限度的限制水分子的吸附和溶解，而高分子间的凝聚力能够抑制水分子在其中的移动，进而有效的抑制水分进出涂层，达到保持水分恒定和保鲜保湿的效果。此外，树脂与防霉剂互溶性好，使得防霉剂充分分散在树脂中，防霉剂均匀分散在树脂内部，避免防霉剂以游离态存在溶于水中导致形成涂层时防霉剂含量下降进而降低防霉效果的问题。防霉剂通过微生物的细胞膜进入细胞内进而消灭微生物或者阻止其发芽以防止霉菌生长，进而达到长期稳定的保鲜效果。
该防霉保鲜涂料特别适用于水果、面包和烟叶等储存期较短、易短时霉变和需及时食用物品的保鲜。
上述防霉保鲜纸10，其防霉保鲜涂层13由防霉保鲜涂料经热处理，使得树脂发生交联反应形成网状结构，防霉剂分散于树脂的网状结构中。得到的防霉保鲜涂层13，其表面致密，孔隙小，因而具有较好的保持水分恒定的效果；防霉剂分散在树脂内部，还能有效防止霉变，进而达到较好的保鲜效果。
上述防霉保鲜纸10，特别适用于水果、面包和烟叶等储存期较短、易短时霉变和需及时食用物品的保鲜。特别的，使用时将防霉保鲜纸10涂覆有防霉保 鲜涂层13的表面作为内表面，可促进防霉保鲜涂层13与防霉保鲜纸10内的保鲜物品接触，进而可提高保鲜效果。
参照图3，本发明还提供一实施例的防霉保鲜纸的制备方法，包括以下步骤。
步骤S210：制备防霉保鲜涂料。具体制备步骤在此不再详述。
步骤S220：将防霉保鲜涂料涂覆于纸基层的一表面并进行热处理使防霉保鲜涂料形成防霉保鲜涂层。
优选的，防霉保鲜涂料涂覆于纸基层的涂覆量为1～10g/m2，即为防霉保鲜涂料在纸基层单位面积上的涂覆量，从而控制防霉保鲜涂层的厚度。
步骤S230：将包括信息层和树脂薄膜层的转移纸以信息层与纸基层的另一表面胶粘并进行热处理，除去树脂薄膜层得到信息层。
步骤S240：将装饰涂层的原料涂覆于信息层上并进行热处理使装饰涂层的原料形成装饰涂层，得到防霉保鲜纸。
优选的，装饰涂层的原料涂覆于纸基层的涂覆量为5～20g/m2，即为装饰涂层的原料在纸基层单位面积上的涂覆量。
可以理解，在其他实施例中，步骤S230可以省略，即制备不含有信息层的防霉保鲜纸时，步骤S240直接将装饰涂层的原料涂覆于纸基层的一表面并进行热处理以使装饰涂层的原料形成装饰涂层，得到防霉保鲜纸。
可以理解，步骤S220也可在步骤S240之后进行。
步骤S220、步骤S230和步骤S240中热处理的条件均为于80～120℃处理5～10s。防霉保鲜涂层中的树脂在该条件下发生交联反应形成致密的网状结构，使得涂层具有防止水分进出的效果。由于涂层的厚度有限，热处理的时间太长将会影响涂层的性能。在该条件下将采用胶粘结合的信息层热处理烘干，使得其胶粘连接更加牢固。
具体的，步骤S220、步骤S230和步骤S240中热处理的条件均为依次于80～85℃、90～100℃、105～120℃、90～100℃和80～85℃下分别处理1～2s。如此防霉保鲜涂料在该温度区域中热处理，该温度区域呈梯度分布，使得防霉保鲜涂料成膜前期逐渐升温，成膜后期逐渐降温，进而提高防霉保鲜涂层的致密性和保证涂层不会开裂。
具体的，进行热处理的具体方法为将待处理物以一定速度依次通过80～85℃、90～100℃、105～120℃、90～100℃和80～85℃的温度区域，并通过控制通过各温度区域的距离和速度以控制热处理的时间。如此可精确控制热处理的时间，避免了反复升温和降温过程中导致热处理时间不好控制的问题。
优选的，步骤S220中热处理的条件为依次于80℃、90℃、120℃、100℃和85℃下分别处理1.2s。步骤S230中热处理的条件为依次于80℃、90℃、110℃、100℃和80℃下分别处理1.2s。步骤S240中热处理的条件为依次于85℃、90℃、105℃、90℃和85℃下分别处理1.2s。
上述保鲜膜的制备方法简单，制备条件易于控制，得到的保鲜膜重现性好。保鲜膜中树脂发生交联反应形成网状结构，防霉剂分散于树脂的网状结构中。得到的防霉保鲜涂层，其表面致密，孔隙小，因而具有较好的保持水分恒定的效果；防霉剂分散在树脂内部，还能有效防止霉变，进而达到较好的保鲜效果。上述防霉保鲜纸特别适用于水果、面包和烟叶等储存期较短、易短时霉变和需及时食用物品的保鲜。
参照图4和图6，本发明还提供一实施例的防霉保鲜纸的制备装置20，包括防霉保鲜涂层形成机构21、信息层形成机构22和装饰涂层形成机构23。
继续参照图1，防霉保鲜涂层形成机构21包括用于涂覆防霉保鲜涂料的第一涂覆组件211、用于对防霉保鲜涂料进行热处理以得到防霉保鲜涂层的第一热处理组件212以及与第一涂覆组件211连接的第一放卷组件213。第一放卷组件213用于将纸基层依次传送至第一涂覆组件211和第一热处理组件212，以涂覆防霉保鲜涂料和形成防霉保鲜涂层。可以理解，在其他实施例中第一放卷组件213可以省略。
具体的，第一涂覆组件211为网纹辊压合涂覆组件。更优选的，网纹辊为电雕辊。更具体的，网纹辊为68μ电雕辊，即网纹辊的网纹深度为68μm。
优选的，第一热处理组件212沿第一放卷组件213传送纸基层的方向依次设有多个温度区域，以使纸基层以特定速度依次经过各个温度区域。多个温度区域沿纸基层的传送方向依次为80～85℃、90～100℃、105～120℃、90～100℃和 80～85℃。更优选的，第一放卷组件213传送纸基层的速度为2.5m/s，各个温度区域沿第一放卷组件213传送纸基层的方向的长度为3m。
参照图4和图5，信息层形成机构22包括胶粘复合组件221、第三热处理组件222和剥离组件223。优选的，胶粘复合组件221包括涂胶复合组件2211及与涂胶复合组件2211连接的转移纸放卷组件2212，转移纸放卷组件2212用于将转移纸传送至涂胶复合组件2211进行胶粘。第三热处理组件222用于将胶粘后的纸基层进行热处理烘干。
更优选的，涂胶复合组件2211为接触式反转涂布辊。
具体的，在本实施例中，防霉保鲜纸的制备装置20还包括导辊24，涂胶复合组件2211与第一热处理组件212通过导辊24连接。可以理解在其他实施例中，涂胶复合组件2211与第一热处理组件212也可单独设置，即不一定要先形成防霉保鲜涂层再形成信息层，也可先在纸基层上先形成信息层再形成防霉保鲜涂层。
具体的，在本实施例中，防霉保鲜纸的制备装置20还包括第一收卷组件25，第一收卷组件25与第三热处理组件222连接，从而使第一收卷组件25将经过胶粘和热处理的纸基层收卷。可以理解，在第三热处理组件222和剥离组件223连接等其他实施例中，第一收卷组件25可以省略。
优选的，第三热处理组件222沿纸基层的传送方向依次设有多个温度区域，以使纸基层以特定速度依次经过各个温度区域。更优选的，纸基层的传送速度为2.5m/s，各个温度区域沿纸基层的传送方向的长度为3m。
参照图5，具体的，在本实施例中，剥离组件223包括第二放卷组件2231、剥离收卷组件2232和纸基层收卷组件2233。第二放卷组件2231用于将第一收卷组件25收卷的产物放卷，剥离收卷组件2232用于将转移纸的树脂薄膜层经剥离收卷，纸基层收卷组件2233用于将剥离树脂薄膜层的纸基层收卷。可以理解，在第三热处理组件222和剥离组件223连接等其他实施例中，第二放卷组件2231可以省略。
继续参照图6，装饰涂层形成机构23包括用于涂覆装饰涂层的原料的第二涂覆组件231、用于对装饰涂层的原料进行热处理以形成装饰涂层的第二热处理 组件232、与第二涂覆组件231连接的第三放卷组件233以及与第二热处理组件232连接的第二收卷组件234。第三放卷组件233用于将纸基层依次传送至第二涂覆组件231和第二热处理组件232，以涂覆装饰涂层的原料和形成装饰涂层。第二收卷组件234用于将经第二热处理组件232处理的纸基层进行收卷。可以理解，在其他实施例中第三放卷组件233和第二收卷组件234可以省略。
具体的，第二涂覆组件231为微凹辊涂覆组件。微凹辊涂覆组件可使装饰涂层的原料涂覆的更加完整和均匀。
优选的，第二热处理组件232沿纸基层的传送方向依次设有多个温度区域，以使纸基层以特定速度依次经过各个温度区域。更优选的，纸基层的传送速度为2.5m/s，各个温度区域沿纸基层的传送方向的长度为3m。
可以理解，在本实施例中，所有收卷组件和放卷组件均为辊，所有热处理组件均为烘箱。可以理解在其他实施例中，也可采用其他部件代替。
上述制备装置20，结构简单，制备保鲜膜的条件易于控制，得到的保鲜膜重现性好。
以下为具体实施例。
实施例1
提供原料，按重量百分含量包括：聚氨酯树脂60％、水30％、姜辣素5％、吐温4％。
将聚氨酯树脂溶于水中，在转速为300转/分钟下搅拌并加热至50℃；加入助剂，在转速为300转/分钟下继续搅拌50min，得到混合液。加入三乙胺后混合液的pH值为7。
将姜辣素以滴加方式在转速为600转/分钟下搅拌下加入混合液，姜辣素滴加结束后，将混合液和姜辣素继续在转速为600转/分钟下搅拌混合1。降温，得到防霉保鲜涂料。
采用制备装置20，将防霉保鲜涂料按10g/m2的涂覆量涂覆于纸基层的一表面并依次于80℃、90℃、120℃、100℃和85℃下分别处理1.2s，得到防霉保鲜涂层；将包括信息层和树脂薄膜层的转移纸以信息层与纸基层胶粘并依次于 80℃、90℃、120℃、100℃和85℃下分别处理1.2s，除去树脂薄膜层得到信息层；再将50wt％清漆和50％防霉保鲜涂料组成的原料按10g/m2的涂覆量涂覆于信息层上并依次于80℃、90℃、120℃、100℃和85℃下分别处理1.2s，形成装饰涂层，得到防霉保鲜纸。
实施例2
提供原料，按重量百分含量包括：聚乙烯醇2488树脂47％、水40％、山梨酸和姜黄根醇总量8％、吐温2％和碳酸氢钠3％。
将聚乙烯醇2488树脂溶于水中，在转速为100转/分钟下搅拌并加热至65℃；加入助剂，在转速为200转/分钟下继续搅拌30min，得到混合液。加入碳酸氢钠后混合液的pH值为8。
将山梨酸和姜黄根醇以滴加方式在转速为800转/分钟下搅拌下加入混合液，山梨酸和姜黄根醇滴加结束后，将混合液、山梨酸和姜黄根醇继续在转速为500～800转/分钟下搅拌混合2h。降温，得到防霉保鲜涂料。
采用制备装置20，将防霉保鲜涂料按1g/m2的涂覆量涂覆于纸基层的一表面并依次于85℃、95℃、110℃、90℃和80℃下分别处理2s，得到防霉保鲜涂层；将包括信息层和树脂薄膜层的转移纸以信息层与纸基层胶粘并依次于85℃、95℃、110℃、90℃和80℃下分别处理2s，除去树脂薄膜层得到信息层；再将20wt％清漆和80％防霉保鲜涂料组成的原料按5g/m2的涂覆量涂覆于信息层上并依次于85℃、95℃、110℃、90℃和80℃下分别处理2s，形成装饰涂层，得到防霉保鲜纸。
实施例3
提供原料，按重量百分含量包括：聚氨酯改性聚偏二氯乙烯树脂20％、水70％、十二烷基丙氨酸0.5％和吐温5％。
将聚氨酯改性聚偏二氯乙烯树脂溶于水中，在转速为200转/分钟下搅拌并加热至60℃；加入助剂，在转速为400转/分钟下继续搅拌50min，得到混合液。
将十二烷基丙氨酸以滴加方式在转速为500转/分钟下搅拌下加入混合液，十二烷基丙氨酸滴加结束后，将混合液和十二烷基丙氨酸继续在转速为500～800转/分钟下搅拌混合1.5h。降温，得到防霉保鲜涂料。
采用制备装置20，将防霉保鲜涂料按5g/m2的涂覆量涂覆于纸基层的一表面并依次于83℃、100℃、105℃、95℃和82℃下分别处理1s，得到防霉保鲜涂层；将包括信息层和树脂薄膜层的转移纸以信息层与纸基层胶粘并依次于85℃、95℃、110℃、90℃和80℃下分别处理2s，除去树脂薄膜层得到信息层；再将30wt％清漆和70％防霉保鲜涂料组成的原料按20g/m2的涂覆量涂覆于信息层上并依次于83℃、100℃、105℃、95℃和82℃下分别处理1s，形成装饰涂层，得到防霉保鲜纸。
实施例4
提供原料，按重量百分含量包括：醋酸乙烯酯-丁酯共聚物40％、水和乙醇(体积比1:1)总量48％、孟宗竹提取物和异维生素C钠(孟宗竹提取物和异维生素C钠的质量比为1:1)总量10％、司盘1.5％和浓氨水0.4％。
将醋酸乙烯酯-丁酯共聚物溶于水中，在转速为300转/分钟下搅拌并加热至40℃；加入助剂，在转速为300转/分钟下继续搅拌50min，得到混合液。加入浓氨水后混合液的pH值为7.5。
将孟宗竹提取物和异维生素C钠单独且同时以滴加方式在转速为800转/分钟下搅拌下加入混合液，防霉剂滴加结束后，将混合液、孟宗竹提取物和异维生素C钠继续在转速为800转/分钟下搅拌混合2h。降温，得到防霉保鲜涂料。
采用制备装置20，将防霉保鲜涂料按8g/m2的涂覆量涂覆于纸基层的一表面并依次于90℃处理10s，得到防霉保鲜涂层；将100％防霉保鲜涂料组成的原料按8g/m2的涂覆量涂覆于信息层上并依次于90℃处理10s，形成装饰涂层，得到防霉保鲜纸。
实施例5
实施例5与实施例4基本相同，不同之处在于，实施例5的防霉剂替换为日柏醇和抗坏血酸钾，且日柏醇和抗坏血酸钾的质量比为0.428:1；热处理的条件为于120℃处理5s。
实施例6
实施例6与实施例4基本相同，不同之处在于，实施例6的防霉剂替换为日柏醇和抗坏血酸钾，且日柏醇和抗坏血酸钾的质量比为0.67:1；热处理的条件 为于80℃处理8s。
实施例7
实施例7与实施例4基本相同，不同之处在于，实施例7的防霉剂替换为大蒜素和水杨菌胺，且大蒜素和水杨菌胺的质量比为1.5:1。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种防霉保鲜纸，其特征在于，包括纸基层、装饰涂层和防霉保鲜涂层，所述防霉保鲜涂层设于所述纸基层的一表面，所述装饰涂层设于所述纸基层的另一表面，所述防霉保鲜涂层的原料为防霉保鲜涂料；
    其中，所述防霉保鲜涂料按重量百分含量包括如下组分：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％，其中所述树脂为聚氨酯、丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯、改性聚偏二氯乙烯、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种，所述溶剂为水和乙醇中的至少一种。
  2. 如权利要求1所述的防霉保鲜纸，其特征在于，所述装饰涂层的原料按重量百分含量计包括装饰涂层树脂30％～50％、云母10％～30％、水20％～60％及色墨0～20％；其中所述装饰涂层树脂为丙烯酸树脂、聚氨酯和环氧树脂中的至少一种。
  3. 如权利要求1～2任一项所述的防霉保鲜纸，其特征在于，所述防霉保鲜纸还包括设于所述纸基层和所述装饰涂层之间的信息层和胶层，所述信息层包括镀铝层及形成于镀铝层上的图案文字层，所述胶层粘结所述纸基层与所述镀铝层，所述装饰涂层设于所述图案文字层上。
  4. 如权利要求3所述的防霉保鲜纸，其特征在于，所述胶层的原料为所述防霉保鲜涂料，且所述防霉保鲜涂料中的树脂为丙烯酸酯类共聚物、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种。
  5. 一种所述的防霉保鲜纸的制备方法，其特征在于，包括以下步骤：
    制备防霉保鲜涂料；所述防霉保鲜涂料的制备包括如下步骤：提供原料，按重量百分含量包括：树脂20％～60％、溶剂30％～70％、防霉剂0.5％～10％和助剂0.3％～5％；其中所述树脂为聚氨酯、丙烯酸酯类共聚物、聚乙烯醇、聚偏二氯乙烯、改性聚偏二氯乙烯、乙烯-醋酸乙烯酯类共聚物、聚醋酸乙烯酯共聚物和醋酸乙烯酯-丁酯共聚物中的至少一种，所述溶剂为水和乙醇中的至少一种；将所述树脂、所述溶剂和所述助剂混合均匀，得到混合液；将所述混合液和所 述防霉剂混合均匀，得到所述防霉保鲜涂料；
    将所述防霉保鲜涂料涂覆于纸基层的一表面并进行热处理使所述防霉保鲜涂料形成防霉保鲜涂层，将装饰涂层的原料涂覆于所述纸基层的另一表面并进行热处理使所述装饰涂层的原料形成装饰涂层，得到所述防霉保鲜纸。
  6. 如权利要求5所述的防霉保鲜纸的制备方法，其特征在于，将装饰涂层的原料涂覆于所述纸基层的另一表面并进行热处理使所述装饰涂层的原料形成装饰涂层的步骤具体包括：
    将包括信息层和树脂薄膜层的转移纸以所述信息层与所述纸基层的另一表面胶粘并进行热处理，除去所述树脂薄膜层得到所述信息层，然后将装饰涂层的原料涂覆于所述信息层上并进行热处理得到所述装饰涂层。
  7. 如权利要求1～4任一项所述的防霉保鲜纸的制备装置，其特征在于，包括：
    防霉保鲜涂层形成机构，包括用于涂覆防霉保鲜涂料的第一涂覆组件和用于对所述防霉保鲜涂料进行热处理以形成所述防霉保鲜涂层的第一热处理组件；
    装饰涂层形成机构，包括用于涂覆所述装饰涂层的原料的第二涂覆组件和用于对所述装饰涂层的原料进行热处理以形成所述装饰涂层的第二热处理组件。
  8. 如权利要求7所述的防霉保鲜纸的制备装置，其特征在于，所述防霉保鲜涂层形成机构还包括与所述第一涂覆组件连接的所述第一放卷组件，所述第一放卷组件用于将所述纸基层依次传送至所述第一涂覆组件和所述第一热处理组件；
    所述装饰涂层形成机构还包括与所述第二涂覆组件连接的第二放卷组件，所述第二放卷组件用于将所述纸基层依次传送至所述第二涂覆组件和所述第二热处理组件。
  9. 如权利要求7所述的防霉保鲜纸的制备装置，其特征在于，所述第一热处理组件和/或所述第二热处理组件沿所述纸基层的传送方向依次设有多个温度区域。
  10. 如权利要求7所述的防霉保鲜纸的制备装置，其特征在于，所述防霉保鲜纸的制备装置还包括信息层形成机构，所述信息层形成机构包括：
    胶粘复合组件，包括涂胶复合组件及与所述涂胶复合组件连接的转移纸放卷组件，所述转移纸放卷组件用于将转移纸传送至所述涂胶复合组件进行胶粘；
    第三热处理组件，用于将胶粘后的纸基层进行热处理烘干；及
    剥离组件，包括剥离收卷组件和纸基层收卷组件，所述剥离收卷组件用于将所述转移纸的树脂薄膜层经剥离收卷，所述纸基层收卷组件用于将剥离树脂薄膜层的纸基层收卷。
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