CN115027118A - Paper, plastic and PVA (polyvinyl alcohol) coated PET (polyethylene terephthalate) aluminized film composite sterile packaging material and preparation method thereof - Google Patents

Paper, plastic and PVA (polyvinyl alcohol) coated PET (polyethylene terephthalate) aluminized film composite sterile packaging material and preparation method thereof Download PDF

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CN115027118A
CN115027118A CN202210587036.9A CN202210587036A CN115027118A CN 115027118 A CN115027118 A CN 115027118A CN 202210587036 A CN202210587036 A CN 202210587036A CN 115027118 A CN115027118 A CN 115027118A
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layer
paper
pva
packaging material
plastic
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马磊
马龙升
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Hebei Dawoxing Packaging Technology Co ltd
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Hebei Dawoxing Packaging Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • C—CHEMISTRY; METALLURGY
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    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • 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
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Abstract

The invention provides a paper, plastic and PVA (polyvinyl alcohol) coated PET (polyethylene terephthalate) aluminized film composite sterile packaging material and a preparation method thereof, belonging to the technical field of paper-plastic-aluminum composite packaging materials. The paper, plastic and PVA coated PET aluminized film composite sterile packaging material sequentially comprises a first polyethylene layer, a second paper layer, a third polyethylene layer, a fourth PVA-coated high-barrier material layer, a fifth PET aluminized film layer, a sixth adhesive resin layer and a seventh polyethylene layer from top to bottom. The paper layer accounts for 70-75% of the weight of the composite sterile packaging material, and the PET aluminizer replaces an aluminum foil layer, so that the requirement of aluminum high-frequency heat conduction required by a filling process is met. PVA is coated, the sealing and blocking performance of the product is improved, the product can not be recycled in the environment due to the aluminum foil layer is reduced, the environment-friendly requirement is better met, the raw material cost is reduced, the production process is simple, and the production efficiency is high.

Description

Paper, plastic and PVA (polyvinyl alcohol) coated PET (polyethylene terephthalate) aluminized film composite sterile packaging material and preparation method thereof
Technical Field
The invention relates to the technical field of paper-plastic-aluminum composite packaging materials, in particular to a paper, plastic and PVA (polyvinyl alcohol) coated PET (polyethylene terephthalate) aluminized film composite sterile packaging material and a preparation method thereof.
Background
The paper-plastic-aluminum composite packaging material is a multilayer composite material for packaging beverages and dairy products, and the storage life of the beverage and dairy products is more than six months. Brick, pillow, roof, and triangular shapes are available on the market. In addition, hexagonal type round cans are newly developed. The paper plastic aluminum composite packaging material is widely applied to aseptic packaging of liquid food, can endow a certain appearance to the package, effectively prevents leakage, prevents oxygen and blocks water vapor, and ensures that the content can obtain a longer product quality guarantee period under the condition of no need of cold store. The application amount of the paper-plastic-aluminum composite packaging material is huge.
Chinese patent CN106364104A discloses a compound aseptic packaging material of paper plastic-aluminum, including the aluminium foil the membrane is drenched to the one side of aluminium foil has first bond line, drenches the membrane in proper order at the another side of aluminium foil and has second bond line and polyethylene heat-seal layer the one side bonding that the aluminium foil was kept away from to first bond line has the paper layer, the paper layer is for the paper that can not directly provide the required whiteness degree of printing and smoothness index the paper layer one side of keeping away from first bond line is provided with coloured polyolefin layer.
Chinese patent CN102896857A discloses a paper-based aluminum-plastic composite material, which is composed of twelve layers of materials bonded together, and the two layers are sequentially from outside to inside: modified polyethylene, an ink layer, a plastic film, a direct aluminum plating layer, adhesive resin, paper, polyethylene, adhesive resin, aluminum foil, adhesive resin and modified polyethylene.
However, the composite materials prepared by the method are added with the aluminum foil, so that the cost is high, the composite materials cannot be degraded, and the environmental pollution is serious.
Disclosure of Invention
In view of the above, the invention provides a paper, plastic and PVA coated PET aluminized film composite sterile packaging material. The composite aseptic packaging material can well prevent liquid from permeating, prolong the shelf life of the product and reduce the manufacturing cost.
The paper, plastic and PVA coated PET aluminized film composite sterile packaging material sequentially comprises a first polyethylene layer, a second paper layer, a third polyethylene layer, a fourth PVA-coated high-barrier material layer, a fifth PET aluminized film layer, a sixth adhesive resin layer and a seventh polyethylene layer from top to bottom.
Preferably, the thickness of the first polyethylene layer is 9-11 μm; the thickness of the second paper layer is 255-265 mu m; the thickness of the third polyethylene layer is 15-18 mu m, and the thickness of the fourth PVA-coated high-barrier material layer is 2-3 mu m; the thickness of the fifth PET aluminized film layer is 10-12 mu m; the thickness of the sixth bonding resin layer is 5-7 mu m; the seventh polyethylene layer has a thickness of 23 to 27 μm.
Preferably, the oxygen transmission capacity of the paper, plastic and PVA coated aluminized film composite sterile packaging material is 1-5 cm3/m 2.24 h.1 mpa; the water vapor permeation amount is 0.6-0.7 g/m2 & 24 h.
Preferably, the first polyethylene layer, the third polyethylene layer and the seventh polyethylene layer are all one or two of low density polyethylene or metallocene polyethylene.
Preferably, the specific component of the adhesive resin layer is any one of an ethylene-acrylic acid copolymer adhesive resin or an anhydride-modified ethylene-vinyl acetate adhesive resin.
Preferably, the paper layer is sterile paper with folding endurance of more than 350 times, stiffness of more than or equal to 5.8mn.m in the longitudinal direction, stiffness of more than or equal to 2.3mn.m in the transverse direction, side permeation of less than or equal to 0.8kg/m2 and whiteness of less than or equal to 1.0%.
Preferably, the paper layer accounts for 70-75% of the weight of the composite sterile packaging material.
Preferably, the coating PVA high barrier material layer comprises the following specific components: nano modified polyvinyl alcohol coating liquid; the nano modified polyvinyl alcohol coating liquid is composed of nano layered kaolin and polyvinyl alcohol according to a mass ratio of 0.5-1: 10-15.
The invention also aims to provide a preparation method of the paper, plastic and PVA coated PET aluminized film composite sterile packaging material, which comprises the following steps:
(1) preparing a nano modified polyvinyl alcohol coating liquid: dissolving polyvinyl alcohol powder particles in water at 85-95 ℃, adding nano layered kaolin, shearing for 2.5-3 hours at a high speed in a reaction kettle, and mutually inserting and superposing nano kaolin flaky crystals to form a nano modified polyhexamethylene alcohol coating liquid;
(2) coating the nano modified polyvinyl alcohol coating liquid prepared in the step (1) on the surface of a PET (polyethylene terephthalate) aluminized film through a coating machine, and drying to form a PVA (polyvinyl alcohol) -coated high-barrier material layer on the PET aluminized film layer;
(3) printing patterns on the sterile paper by an intaglio printing press or a satellite flexible printing press to form a paper layer with characters and patterns;
(4) and (3) according to the sequence of a first polyethylene layer, a second paper layer, a third polyethylene layer, a fourth PVA-coated high-barrier material layer, a fifth PET aluminum-plated film layer, a sixth bonding resin layer and a seventh polyethylene layer, carrying out multilayer coextrusion extrusion compounding on the PET aluminum-plated film layer and the PVA-coated high-barrier material layer prepared in the step (2) and other structures to form the paper, plastic and PVA-coated PET aluminum-plated film composite sterile packaging material.
Compared with the prior art, the invention has the following beneficial effects:
1. the composite sterile packaging material prepared by the invention has the advantages that the weight ratio of paper in the composite sterile packaging material is about 70-75%, the paper is easy to degrade and convenient to fill and form, the appearance of the product is printed delicately, the shelf display is favorable for the consumer aesthetics, the product has high barrier property, the quality guarantee period of packaged contents is long, the sealing property is good, and the original flavor of the contents is maintained.
2. The coating liquid prepared by the nano kaolin sheet intercalation process is dried by a coating process to form a high polymer material with the same barrier property as an aluminum foil, but the weight ratio of a polyvinyl alcohol (PVA) coating with the same area is only one twentieth of that of an aluminum foil layer. The product is lighter, the manufacturing cost is one twentieth of that of an aluminum foil layer, and most importantly, the polyvinyl alcohol is soluble in water, is easy to decompose and has no pollution to the environment, while the aluminum foil cannot be degraded and has serious environmental pollution.
3. The paper, plastic and PVA coated PET aluminized film composite sterile packaging material prepared by the invention removes the aluminum foil layer, so that the paper, plastic and PVA coated PET aluminized film composite sterile packaging material is thinner, lighter, high in barrier property, beneficial to environmental protection and convenient to use, and is more practical.
4. The paper, plastic and PVA coated PET aluminized film composite sterile packaging material prepared by the invention is green and environment-friendly, is non-toxic and harmless, reduces environmental pollution, has strong market competitiveness in the current domestic external packaging industry, and has very wide market prospect.
The PET aluminized film coated by the nano modified polyhexamethylene alcohol coating liquid has excellent performance, the polyvinyl alcohol coating liquid basically does not adopt auxiliary agents such as a plasticizer, a cross-linking agent, an antioxidant, a catalyst and the like, the purity of PVA is effectively improved, the compactness of the film is increased, the barrier performance of the film is improved, the barrier performance of the film to substances such as oxygen, water vapor and the like is further enhanced by utilizing the nano layered kaolin modified polyvinyl alcohol coating liquid, the puncture resistance of the film is increased by utilizing the good flexibility of the PET film, the PVA coating added with nano layered kaolin is effectively protected, the gas barrier effect is further improved, the permeation amount of oxygen and water vapor is effectively reduced, the PET aluminized film replaces an aluminum foil layer, the requirement of high-frequency heat conduction of a filling process is ensured, the sealing barrier performance of a product is also ensured, and the raw material cost is reduced, the production process is simple and the production efficiency is high.
Drawings
FIG. 1 is a schematic structural view of a paper, plastic and PVA coated PET aluminized film composite sterile packaging material prepared by the invention;
in fig. 1, reference numeral 1 denotes a first polyethylene layer, 2 denotes a second paper layer, 3 denotes a third polyethylene layer, 4 denotes a fourth PVA-coated high barrier material layer, 5 denotes a fifth PET aluminum-plated film layer, 6 denotes a sixth adhesive resin layer, and 7 denotes a seventh polyethylene layer.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The paper, plastic and PVA coated PET aluminized film composite sterile packaging material sequentially comprises the following structures from top to bottom:
a first polyethylene layer having a thickness of 11 μm;
a second paper layer having a thickness of 255 μm;
a third polyethylene layer having a thickness of 15 μm;
a fourth coating PVA high-barrier material layer with the thickness of 2 mu m;
a fifth PET aluminized film layer with the thickness of 10 mu m;
a sixth adhesive resin layer having a thickness of 6 μm;
a seventh polyethylene layer having a thickness of 25 μm.
The first polyethylene layer, the third polyethylene layer and the seventh polyethylene layer are all low-density polyethylene.
The paper layer has folding endurance of more than 350 times, stiffness of more than or equal to 5.8mn.m in the longitudinal direction, stiffness of more than or equal to 2.3mn.m in the transverse direction, and edge penetration of less than or equal to 0.8kg/m 2 The whiteness is less than or equal to 1.0 percent; the paper layer accounts for 72% of the weight of the composite sterile packaging material.
The preparation method of the paper, plastic and PVA coated aluminized film composite sterile packaging material comprises the following steps:
(1) preparing a nano modified polyvinyl alcohol coating liquid: dissolving polyvinyl alcohol powder particles in water at 90 ℃, adding nano layered kaolin, shearing for 2 hours at a high speed in a reaction kettle, and mutually inserting and superposing nano kaolin flaky crystals to form nano modified polyhexamethylene alcohol coating liquid, wherein the mass ratio of the nano layered kaolin to the polyvinyl alcohol is 1: 12;
(2) coating the surface of the PET aluminized film with the nano modified polyvinyl alcohol coating liquid prepared in the step (1) through a coating machine, and drying to form a PVA-coated high-barrier material layer on the PET aluminized film layer;
(3) printing patterns on the sterile paper by an intaglio printing press or a satellite printing press to form a paper layer printed with characters and patterns;
(4) and (3) according to the sequence of a first polyethylene layer, a second paper layer, a third polyethylene layer, a fourth PVA-coated high-barrier material layer, a fifth PET aluminum-plated film layer, a sixth bonding resin layer and a seventh polyethylene layer, carrying out multilayer coextrusion extrusion compounding on the PET aluminum-plated film layer and the PVA-coated high-barrier material layer prepared in the step (2) and other structures to form the paper, plastic and PVA-coated PET aluminum-plated film composite sterile packaging material.
The oxygen transmission capacity of the paper, plastic and PVA coated PET aluminized film composite sterile packaging material prepared by the invention is 1.5cm 3 /m 2 24 h.1 mpa; the water vapor permeation amount is 0.62g/m 2 ·24h。
Example 2
The paper, plastic and PVA coated PET aluminized film composite sterile packaging material sequentially comprises the following structures from top to bottom:
a first polyethylene layer having a thickness of 12 μm;
a paper layer with a thickness of 280 μm;
a second polyethylene layer having a thickness of 20 μm;
a PVA-coated high-barrier material layer with the thickness of 3 mu m;
a PET aluminized film layer with the thickness of 11 mu m;
an adhesive resin layer having a thickness of 7 μm;
a third polyethylene layer having a thickness of 28 μm.
The first polyethylene layer, the third polyethylene layer and the seventh polyethylene layer are all low-density polyethylene.
The paper layer has folding endurance of more than 350 times, stiffness of more than or equal to 5.8mn.m in the longitudinal direction, stiffness of more than or equal to 2.3mn.m in the transverse direction, and edge penetration of less than or equal to 0.8kg/m 2 The whiteness is less than or equal to 1.0 percent; the paper layer accounts for 75% of the weight of the composite sterile packaging material.
The preparation method of the paper, plastic and PVA coated PET aluminized film composite sterile packaging material comprises the following steps:
(1) preparing nano modified polyvinyl alcohol coating liquid: dissolving polyvinyl alcohol powder particles in water at 90 ℃, adding nano-layered kaolin, shearing the nano-layered kaolin at a high speed for 2.5 hours in a reaction kettle, and mutually inserting and superposing nano-kaolin flaky crystals to form a nano-modified polyhexamethylene alcohol coating liquid, wherein the mass ratio of the nano-layered kaolin to the polyvinyl alcohol is 1: 15;
(2) coating the surface of the PET aluminized film with the nano modified polyvinyl alcohol coating liquid prepared in the step (1) through a coating machine, and drying to form a PVA-coated high-barrier material layer on the PET aluminized film layer;
(3) printing patterns on the sterile paper by an intaglio printing press or a satellite type flexible printing press to form a paper layer;
(4) and (3) according to the sequence of a first polyethylene layer, a second paper layer, a third polyethylene layer, a fourth PVA-coated high-barrier material layer, a fifth PET aluminum-plated film layer, a sixth bonding resin layer and a seventh polyethylene layer, carrying out multilayer coextrusion extrusion compounding on the PET aluminum-plated film layer and the PVA-coated high-barrier material layer prepared in the step (2) and other structures to form the paper, plastic and PVA-coated PET aluminum-plated film composite sterile packaging material.
The PET aluminum film-coated paper, plastic and PVA composite sterile packaging material prepared by the invention has the oxygen transmission capacity of 0.87cm 3 /m 2 24 h.1 mpa; the water vapor permeation amount is 0.60g/m 2 ·24h。
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.

Claims (9)

1. The utility model provides a compound aseptic packaging material of paper, plastics, PVA coating PET aluminizer which characterized in that, it includes first polyethylene layer, second paper layer, third polyethylene layer, fourth coating PVA high barrier material layer, fifth PET aluminized film layer, sixth adhesive resin layer, seventh polyethylene layer from top to bottom in proper order.
2. The paper, plastic and PVA coated PET aluminized film composite aseptic packaging material according to claim 1, characterized in that the thickness of the first polyethylene layer is 9-11 μm; the thickness of the second paper layer is 255-265 mu m; the thickness of the third polyethylene layer is 15-18 mu m, and the thickness of the fourth PVA-coated high-barrier material layer is 2-3 mu m; the thickness of the fifth PET aluminized film layer is 10-12 mu m; the thickness of the sixth bonding resin layer is 5-7 mu m; the seventh polyethylene layer has a thickness of 23 to 27 μm.
3. The paper, plastic and PVA coated PET aluminized film composite sterile packaging material according to claim 1, wherein the oxygen transmission amount of the paper, plastic and PVA coated PET aluminized film composite sterile packaging material is 1-5 cm 3 /m 2 24 h.1 mpa; the water vapor permeation amount is 0.6-0.7 g/m 2 ·24h。
4. The paper, plastic or PVA coated PET aluminized composite aseptic packaging material of claim 1, wherein the first polyethylene layer, the third polyethylene layer and the seventh polyethylene layer are all one or two of low density polyethylene or metallocene polyethylene.
5. The paper, plastic and PVA coated PET aluminized film composite aseptic packaging material according to claim 1, wherein the specific component of the bonding resin layer is any one of ethylene-acrylic acid copolymer bonding resin or anhydride modified ethylene-vinyl acetate bonding resin.
6. The paper, plastic and PVA coated PET aluminized film composite aseptic packaging material of claim 1, wherein the paper layer has a folding endurance of more than 350 times, a stiffness of more than or equal to 5.8mn.m in the longitudinal direction, a stiffness of more than or equal to 2.3mn.m in the transverse direction, and a side permeation of less than or equal to 0.8kg/m 2 And the whiteness is less than or equal to 1.0 percent.
7. The paper, plastic and PVA coated PET aluminized film composite sterile packaging material according to claim 1, characterized in that the paper layer accounts for 70-75% of the weight of the composite sterile packaging material.
8. The paper, plastic and PVA coated PET aluminized film composite aseptic packaging material according to claim 1, characterized in that the PVA-coated high-barrier material layer comprises the following specific components: nano modified polyvinyl alcohol coating liquid; the nano modified polyvinyl alcohol coating liquid is composed of nano layered kaolin and polyvinyl alcohol according to a mass ratio of 0.5-1: 10-15.
9. The preparation method of the paper, plastic and PVA coated PET aluminized film composite aseptic packaging material according to claim 1, characterized by comprising the following steps:
(1) preparing a nano modified polyvinyl alcohol coating liquid: dissolving polyvinyl alcohol powder particles in water at 85-95 ℃, adding nano layered kaolin, shearing for 2.5-3 hours at a high speed in a reaction kettle, and mutually inserting and superposing nano kaolin flaky crystals to form a nano modified polyhexamethylene alcohol coating liquid;
(2) coating the surface of the PET aluminized film with the nano modified polyvinyl alcohol coating liquid prepared in the step (1) through a coating machine, and drying to form a nano modified PVA high-barrier material coating layer on the PET aluminized film layer;
(3) printing patterns on the sterile paper by an intaglio printing press or a satellite flexible printing press to form a paper layer with printed characters and patterns;
(4) and (3) extruding and compounding the PET aluminized film layer and the coated PVA high-barrier material layer prepared in the step (2) and other structures through a multilayer coextrusion compounding unit to form the paper, plastic and PVA coated PET aluminized film composite sterile packaging material according to the sequence of a first polyethylene layer, a second paper layer, a third polyethylene layer, a fourth coated PVA high-barrier material layer, a fifth PET aluminized film layer, a sixth adhesive resin layer and a seventh polyethylene layer.
CN202210587036.9A 2022-05-26 2022-05-26 Paper, plastic and PVA (polyvinyl alcohol) coated PET (polyethylene terephthalate) aluminized film composite sterile packaging material and preparation method thereof Pending CN115027118A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002326321A (en) * 2001-04-27 2002-11-12 Toppan Printing Co Ltd Gas barrier packaging material
JP2009154906A (en) * 2007-12-26 2009-07-16 Toppan Printing Co Ltd Composite sheet material for paper container and paper container formed using this composite sheet
CN102245386A (en) * 2008-12-17 2011-11-16 利乐拉瓦尔集团及财务有限公司 Packaging laminate, method for manufacturing of the packaging laminate and packaging container produced there from
CN107237213A (en) * 2017-06-09 2017-10-10 潮州市潮安区华星晟泰彩印实业有限公司 Packaging for foodstuff paper wood, packaging for foodstuff paper wood preparation method and food containers
CN110128689A (en) * 2019-04-04 2019-08-16 安徽猛牛彩印包装有限公司 A kind of recyclable transparency high separation composite membrane
CN114368204A (en) * 2021-12-15 2022-04-19 乐美包装（昆山）有限公司 Packaging composite material, manufacturing method and packaging container

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002326321A (en) * 2001-04-27 2002-11-12 Toppan Printing Co Ltd Gas barrier packaging material
JP2009154906A (en) * 2007-12-26 2009-07-16 Toppan Printing Co Ltd Composite sheet material for paper container and paper container formed using this composite sheet
CN102245386A (en) * 2008-12-17 2011-11-16 利乐拉瓦尔集团及财务有限公司 Packaging laminate, method for manufacturing of the packaging laminate and packaging container produced there from
CN107237213A (en) * 2017-06-09 2017-10-10 潮州市潮安区华星晟泰彩印实业有限公司 Packaging for foodstuff paper wood, packaging for foodstuff paper wood preparation method and food containers
CN110128689A (en) * 2019-04-04 2019-08-16 安徽猛牛彩印包装有限公司 A kind of recyclable transparency high separation composite membrane
CN114368204A (en) * 2021-12-15 2022-04-19 乐美包装（昆山）有限公司 Packaging composite material, manufacturing method and packaging container

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