WO2023185815A1 - 包装材料及其制备方法、包装容器 - Google Patents

包装材料及其制备方法、包装容器 Download PDF

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Publication number
WO2023185815A1
WO2023185815A1 PCT/CN2023/084322 CN2023084322W WO2023185815A1 WO 2023185815 A1 WO2023185815 A1 WO 2023185815A1 CN 2023084322 W CN2023084322 W CN 2023084322W WO 2023185815 A1 WO2023185815 A1 WO 2023185815A1
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WO
WIPO (PCT)
Prior art keywords
layer
area
wall
side wall
packaging material
Prior art date
Application number
PCT/CN2023/084322
Other languages
English (en)
French (fr)
Other versions
WO2023185815A9 (zh
Inventor
朱向阳
沙海涛
宋强
李杏彬
Original Assignee
康美包（苏州）有限公司
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Publication of WO2023185815A1 publication Critical patent/WO2023185815A1/zh
Publication of WO2023185815A9 publication Critical patent/WO2023185815A9/zh

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Classifications

    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/12—Layered products comprising a layer of metal comprising metal 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • 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
    • B32B2255/12—Coating on the layer surface on paper 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
    • B32B2307/31—Heat sealable
    • 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
    • B32B2439/00—Containers; Receptacles
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Definitions

  • the present application relates to the field of packaging, and in particular to a packaging material, a preparation method thereof, and a packaging container.
  • can-shaped packaging boxes and bottle packaging boxes cannot directly print information and promotional information. Therefore, in many packaging fields, flexible packaging materials, such as paper packaging materials, are also needed to make packaging boxes.
  • the printing layer is placed on the outer layer of the cardboard layer, that is, on the side away from the inner space of the container, and a PE layer needs to be placed on the outer layer of the printing layer to protect the printing layer from being At the same time, when making the packaging box, it can also be bonded with the heat sealing layer of the inner layer of the cardboard layer to form a sealed packaging box.
  • the density of the outer PE layer is generally 10-15g/m2. Since the coating amount of the outer PE layer is relatively large, the outer PE layer needs to be separated from the cardboard layer during the recycling process of the packaging box. , and then recycle the cardboard and PE layers separately, which undoubtedly increases the difficulty of recycling, increases recycling energy consumption and recycling costs. In addition, for unrecycled packaging boxes, the presence of a large amount of PE materials will also cause environmental pollution.
  • This application discloses a packaging material, a preparation method thereof, and a packaging container to solve the problems of existing packaging materials that are difficult to recycle due to high PE content in the outer layer, high recycling costs, and easily cause environmental pollution.
  • the present application provides a packaging material.
  • the packaging material includes a cardboard layer.
  • the cardboard layer includes a first surface and a second surface, wherein: the packaging material includes a layer along a first surface on one side of the first surface.
  • the barrier layer and the heat sealing layer are arranged in one direction; the packaging material does not contain a polyethylene layer on one side of the second surface along the second direction, wherein the first direction and the second direction are on the same straight line And the direction is opposite.
  • the packaging material includes a printing layer on one side of the second surface, and the printing layer includes water-based ink or solvent-based ink.
  • the packaging material further includes a protective layer on one side of the second surface along the second direction, wherein the protective layer is a non-polyethylene layer, and the coating amount of the protective layer is 1-5g/m 2 .
  • the packaging material further includes a base coating on one side of the second surface along the second direction, wherein the base coating is a non-polyethylene layer, and the heat sealing strength of the base coating is greater than the Protective layer, the coating amount of the base coat is 1-5g/m 2 .
  • the second surface includes a first area and a second area, wherein the first area is at least one of a bottom sealing area, an ear wing sealing area or a side wall sealing area of the packaging material, The second area is the remaining area of the second surface except the first area, and the packaging material includes at least one of the following situations:
  • the base coating at least partially covers the first area
  • the protective layer at least partially covers the second area
  • the primer coat at least partially covers the second area
  • the protective layer at least partially covers the first area.
  • the protective layer is formed of an aqueous resin emulsion, and the particle size of the solid particles in the aqueous resin emulsion is 0.2-0.9um.
  • aqueous resin emulsion includes the following components: acrylic resin emulsion, defoaming agent and leveling agent.
  • the raw materials of the base coating include: hard self-crosslinking acrylic emulsion, soft self-crosslinking acrylic emulsion, leveling agent, defoaming agent and water.
  • the static friction coefficient of the second surface of the packaging material is 0.310-0.352;
  • the kinetic friction coefficient of the second surface of the packaging material is 0.162-0.198.
  • the protective layer or the undercoat layer is formed on the surface of the printing layer through a gravure printing process.
  • this application provides a method for preparing the above-mentioned packaging material, including the following steps:
  • the cardboard layer is laminated with the barrier layer and the heat sealing layer in sequence, and then the printing layer is formed on the side of the cardboard layer away from the barrier layer through a gravure printing process, and then the printing layer is The protective layer and the undercoat layer are respectively formed on the surface through a gravure printing process.
  • the viscosity of the protective coating used to form the protective layer is 14-23 seconds/Zai En Cup 2# under ASTM D4212-93 standard, and the printing speed is 400-800m/min.
  • the viscosity of the primer slurry used to form the primer layer is 14-23 seconds/Cai En Cup 2# under ASTM D4212-93 standard, and the printing speed is 400-800m/min.
  • the present application provides a packaging container, which is formed by sealing with the above-mentioned packaging material.
  • the packaging container includes a side wall surrounded by a containing space, and the side wall has a side wall seal.
  • the side wall sealing area is formed by overlapping and pressing the first side area and the second side area of the packaging material.
  • the side wall sealing area is formed by bonding the protective layer corresponding to the first side area and the heat sealing layer corresponding to the second side area.
  • the side wall sealing area is formed by bonding the base coating or protective layer corresponding to the first side area and the heat sealing layer corresponding to the second side area.
  • the side wall sealing area includes a first side wall area, a second side wall area and a third side wall area;
  • the first side wall region includes a first layer sequence, and the first layer sequence includes a first wall layer, a second wall layer, and a third wall layer that are sequentially arranged outward from the accommodation space; wherein, in the In the first side wall area, the second wall layer is formed by bending the first wall layer and then bending in a direction close to the first wall layer, and the second wall layer and the third wall layer are layer connection;
  • the first wall layer includes a first heat sealing layer and a first carrier layer arranged sequentially outward from the accommodation space;
  • the second wall layer includes a second carrier layer and a second heat sealing layer arranged sequentially outward from the accommodation space;
  • the third wall layer includes a third heat sealing layer and a third carrier layer arranged sequentially outward from the accommodation space;
  • the third carrier layer has a layer thickness that is greater than the layer thickness of the second carrier layer, and/or the third carrier layer has a layer thickness that is greater than the first carrier layer. layer thickness;
  • the second side wall area includes a second layer sequence, and the second layer sequence includes the first wall layer, the second wall layer and the third wall layer arranged sequentially outward from the accommodation space. wall layer;
  • the first wall layer is connected to the second wall layer, and the second wall layer is connected to the third wall layer; and in the second side wall area , the layer thickness of the second carrier layer is smaller than the layer thickness of the first carrier layer, and/or the layer thickness of the second carrier layer is smaller than the layer thickness of the third carrier layer; the first The carrier layer, the second carrier layer and the third carrier layer are the sum of the remaining layers of the packaging material except the heat sealing layer;
  • the third side wall area includes a third layer sequence, the third layer sequence includes the first wall layer and the third wall layer arranged sequentially outward from the accommodation space, and in the In the third side wall area, the first wall layer is connected to the third wall layer; the surface of the first wall layer used to connect to the third wall layer is provided with the base coating or protective layer. layer; the protective layer is provided on the outer surface of the packaging container.
  • the packaging container includes a top, a bottom and the side wall provided between the top and the bottom; the bottom is provided with a bottom sealing area, and the bonding area of the bottom sealing area is provided with There is the base coating or protective layer; the outer surface of the packaging container is provided with the protective layer.
  • the top is provided with an ear wing sealing area, and the ear wing sealing area includes an ear wing, which is bent from the top of the packaging container toward the side wall and then connected to the side wall. ;
  • the surface of the ear wing facing the side wall is provided with the base coating, and/or the surface of the side wall used to connect with the ear wing is provided with the base coating.
  • the packaging material of the present application does not contain a polyethylene layer in the second direction of the second surface, During recycling, it no longer needs to be separated from the cardboard layer, but directly enters the recycling process of the cardboard layer. As a result, the separation process from the cardboard layer can be reduced, the recycling process of the packaging box can be simplified, and the difficulty and cost of recycling can be reduced. At the same time, the environmental protection of the packaging box can be improved and environmental pollution can be reduced.
  • Figure 1 is a schematic structural diagram of a packaging material according to an embodiment of the present application.
  • Figure 2 is a schematic diagram of the second surface of the packaging material according to an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a packaging container of the present application.
  • Figure 4 is a schematic diagram of the bottom sealing of a packaging container according to an embodiment of the present application.
  • Figure 5 is a schematic diagram of the second surface of the packaging material according to another embodiment of the present application.
  • Figure 6 is a schematic structural diagram of another packaging container of the present application.
  • Figure 7 is a schematic diagram of the bottom sealing of a packaging container according to another embodiment of the present application.
  • Figure 8 is a schematic diagram of the second surface of the packaging material according to another embodiment of the present application.
  • Figure 9 is a schematic structural diagram of another packaging container of the present application.
  • Figure 10 is a schematic diagram of the bottom sealing of a packaging container according to another embodiment of the present application.
  • Figure 11 is a schematic structural diagram of the side wall sealing area in an embodiment of the present application.
  • Figure 12 is a schematic cross-sectional structural diagram of the side wall sealing area in an embodiment of the present application.
  • the numerical range "6 ⁇ 22” means that all real numbers between “6 ⁇ 22” have been listed in this article, and "6 ⁇ 22" is just an abbreviation of these numerical combinations.
  • the “range” disclosed in this application is in the form of a lower limit and an upper limit, which may be one or more lower limits and one or more upper limits respectively.
  • each reaction or operation step can be performed sequentially or in sequence.
  • the reaction methods herein are carried out sequentially.
  • the packaging material includes a cardboard layer 101 .
  • One side of the cardboard layer 101 that is, the first surface 101a, is provided with a barrier layer 103 and a heat sealing layer 104 stacked in sequence along the first direction D1.
  • the other side surface of the cardboard layer 101 that is, the second surface 101b, is provided with a printing layer 102.
  • Printing layer 102 may include water-based ink or solvent-based ink.
  • the first direction D1 and the second direction D2 are on the same straight line (for example, in the thickness direction of the cardboard layer 101) and have opposite directions.
  • the packaging material does not contain a polyethylene layer on one side of the second surface 101b along the second direction D2.
  • a polyethylene layer is provided on the second surface 101b of the cardboard layer 101, located between the printing layer 102 and the cardboard layer 101, or on the side of the printing layer 102 away from the cardboard layer 101.
  • One of the main technical solutions of this application is to replace the polyethylene layer in the above-mentioned prior art with a heat-sealing resin, which not only reduces the amount of polyethylene, is more environmentally friendly, but also reduces production costs.
  • the barrier layer 103 can be an Al layer or a non-metal barrier layer, for example, it can be high density polyethylene (HDPE), low density polyethylene (LDPE), polyethylene Vinyl alcohol (polyvinyl alcohol vinylalcohol polymer, PVOH), ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), nylon (polyamide, PA), polyethylene terephthalate (polyethylene glycol terephthalate, PET) or combination thereof, etc.
  • HDPE high density polyethylene
  • LDPE low density polyethylene
  • PVOH polyethylene Vinyl alcohol
  • EVOH ethylene-vinyl alcohol copolymer
  • PVDC polyvinylidene chloride
  • nylon polyamide, PA
  • PET polyethylene terephthalate
  • PET polyethylene glycol terephthalate
  • the heat sealing layer 104 includes a composite layer of low-density polyethylene LDPE and metallocene polyethylene, or a composite layer of linear low-density polyethylene LLDPE and metallocene polyethylene, in which the mass proportion of metallocene polyethylene in the heat sealing layer is For example, it can be 35%-95%.
  • a first adhesive layer 105 can be provided between the cardboard layer 101 and the barrier layer 103, and a second adhesive layer 106 can be provided between the barrier layer 103 and the heat sealing layer 104. .
  • the first adhesive layer or the second adhesive layer can be a polyolefin material layer (such as polyethylene, etc.), or it can be polyethylene-maleic anhydride graft polymer (EMAH), ethylene-acrylic acid copolymer (EAA) ) or ethylene-methacrylic acid copolymer (EMAA), etc.
  • EMAH polyethylene-maleic anhydride graft polymer
  • EAA ethylene-acrylic acid copolymer
  • EAA ethylene-methacrylic acid copolymer
  • EAA ethylene-methacrylic acid copolymer
  • the cardboard layer can be selected from one of cardboard, cardboard and paper or a combination of at least two thereof, and is used for printing various patterns and characters.
  • the printing layer is an ink layer that covers the surface of the cardboard layer to form various required patterns, text and symbols.
  • the packaging material further includes a protective layer 108 on one side of the second surface 101b along the second direction D2, where the protective layer 108 is a non-polyethylene layer, and the coating amount of the protective layer is 1-5g/m2.
  • the protective layer 108 has certain heat sealing performance, and can also block water and protect the paper layer 101 .
  • the protective layer 108 is formed of an aqueous resin emulsion, and the particle size of the solid particles in the aqueous resin emulsion is 0.2-0.9um.
  • Water-based resin emulsion includes the following components: acrylic resin emulsion, defoaming agent and leveling agent.
  • the packaging material may further include a base coating 107 on one side of the second surface 101b along the second direction D2, where the base coating 107 is a non-polyethylene layer, and the coating amount of the base coating 107 is 1 -5g/m2.
  • the base coating 107 has certain heat sealing properties and can also block water and protect the paper layer 101 .
  • the undercoat layer 107 is formed from an aqueous resin emulsion, and the particle size of the solid particles in the aqueous resin emulsion is 0.2-0.9um.
  • Water-based resin emulsion includes the following components: acrylic resin emulsion, defoaming agent and leveling agent.
  • the protective layer 108 and the primer layer 107 are different.
  • the heat sealing strength of the primer layer 107 is greater than that of the protective layer 108 .
  • the material constituting the base coat 107 is more functionalized (e.g., has more carboxyl and hydroxyl groups) than the acrylic constituting the protective layer 108 group), so that the heat sealing strength of the base coat layer 107 is greater than that of the protective layer 108.
  • different locations require different heat sealing strengths.
  • the protective layer 108 and the bottom layer can be configured at different locations on the second surface 101b. Coating 107.
  • the mass ratio of the primer layer 107 and the protective layer 108 can be between 1:15 and 1:1, and the preferred range is 1:10 and 1:5, and more preferably The range is 1:9 ⁇ 1:4.
  • the static friction coefficient of the second surface of the packaging material is 0.310-0.352
  • the second surface of the packaging material is a surface on the same side as the second surface of the cardboard layer.
  • the kinetic friction coefficient of the second surface of the packaging material is 0.162-0.198.
  • the friction coefficient measuring instrument can be used to measure the above-mentioned static friction coefficient and kinetic friction coefficient of packaging materials. For example, when testing the static friction coefficient and kinetic friction coefficient at normal temperature, such as 20-30°C, when the second surfaces of two pieces of packaging materials overlap and contact, the test conditions can be 3000g in an area of 63.5mm ⁇ 63.5mm. Take measurements.
  • a protective layer 108 or a primer layer 107 is provided on the surface of the packaging material according to specific needs.
  • the second surface 101b may include a first area and a second area.
  • the heat sealability of the sealing coating in the first zone is higher than the heat sealing property of the sealing coating in the second zone.
  • the first area is at least one of the bottom sealing area, ear wing sealing area or side wall sealing area of the packaging material, and the second area is the remaining area of the second surface except the first area.
  • Figures 2 to 4 illustrate an embodiment of making a packaging container based on the packaging material disclosed in this application.
  • Figure 2 is a schematic diagram of an embodiment of the second surface of a packaging material according to the present application.
  • Figure 3 shows a packaging container manufactured according to the packaging material shown in Figure 2.
  • Figure 4 is a schematic diagram of the bottom sealing of the package shown in Figure 3.
  • the packaging material shown in Figure 2 is folded and filled to form the packaging container shown in Figures 3 and 4.
  • the second surface 101b may include a plurality of pre-crease lines, which facilitate the packaging material to be folded into the package as shown in Figure 3 on the filling machine.
  • the second surface may include one or more of transverse pre-crease lines 211, 212, 213 or 214.
  • the second surface may include one or more of longitudinal pre-crease lines 221, 222, 223 or 224.
  • the second surface may include one or more of diagonal pre-crease lines 231, 232, 233, 234, 235, 236, 237, or 238.
  • the second surface further includes side surfaces 241, 242, 243 and 244 formed by pre-creasing lines.
  • the side wall of the packaging container is formed, such as the packaging side wall 311.
  • the second surface further includes first side regions 239 and second side regions 240 .
  • the first side area 239 and the second side area 240 are butted and/or overlapped to form the middle sealing area 302 as shown in Figure 3 or Figure 4 .
  • the second surface does not contain a polyethylene layer (for example, a polyethylene layer formed by lamination or lamination).
  • the second surface can be covered with a protective layer and/or a primer layer as shown in Figure 1 .
  • the second surface further includes an ear wing forming area, for example, as shown in Figure 3, the transverse pre-crease line 211, the transverse pre-crease line 212, the longitudinal pre-crease line 221, the longitudinal pre-crease line 222 combined with the oblique pre-crease line
  • the lines 231 and 232 together form an ear wing forming area, which is used to form the ear wing 301 shown in FIG. 3 .
  • the ear flaps 301 need to be glued to the side walls 311.
  • the second surface of the packaging material further includes a wing seal area.
  • the ear wing sealing area may be located within the ear wing forming area, or may be located in the side wall area adjacent to the ear wing forming area.
  • the second surface of the packaging material further includes a wing seal area 251, 252, 253 or 254.
  • the ear wing sealing area may be located in the ear wing forming area (for example, 251 or 253), and may partially or completely cover the ear wing forming area.
  • the ear wing sealing area can also be located on the corresponding side wall of the ear wing forming area (for example, 252 or 254).
  • the heat sealing strength required for the ear flap sealing area is greater than that of the first side area 239 or the second side area 239 .
  • the side area 240 therefore the protective layer 108 described in Figure 1 may at least partially cover the first side area 239 or the second side area 240, and the base coat 107 may at least partially cover the ear wing sealing area.
  • the second surface further includes a bottom forming area, such as the shaded portion 261 described in FIG. 2 , for forming the bottom seal shown in FIG. 4 .
  • the filling equipment forms the bottom seal by folding pre-crease lines (eg 213, 214, 235, 236, 237, 238).
  • the bottom forming area further includes a bottom sealing area.
  • the shaded part 261, or the area formed by the longitudinal pre-crease line 221, the transverse pre-crease line 213, the transverse pre-crease line 214, and the oblique pre-crease line 235, or the transverse pre-crease line 213, the oblique pre-fold line The area formed by the score line 235 and the oblique pre-crease line 236.
  • the heat sealing strength required by the bottom sealing area is greater than that of the first side area or the second side area, so the protective layer described in Figure 1 can at least partially cover the first side area or the second side area. area, the base coat may at least partially cover the bottom sealing area.
  • the second surface may include a first region and a second region.
  • the heat sealability of the sealing coating in the first zone is higher than the heat sealing property of the sealing coating in the second zone.
  • the first area is at least one of the bottom sealing area, ear wing sealing area or side wall sealing area of the packaging material, and the second area is the remaining area of the second surface except the first area.
  • Figures 5 to 7 show another embodiment of making a packaging container based on the packaging material disclosed in the present application.
  • Figure 5 is a schematic diagram of an embodiment of the second surface of a packaging material according to the present application.
  • FIG. 6 shows a packaging container manufactured according to the packaging material shown in FIG. 5 .
  • FIG. 7 is a schematic diagram of the bottom sealing of the packaging container shown in FIG. 6 .
  • the packaging material shown in Figure 5 is folded and filled to form the packaging container shown in Figures 6 and 7.
  • the final packaging container has a generally arc-shaped surrounding side 601, and its corresponding edge 602 has a rounded shape. arc shape.
  • the so-called arc-shaped surround means that, as shown in FIG. 6 , at 21 or 22 , compared with the edge 340 in FIG. 3 , at least part of the corresponding edge must be chamfered.
  • the second surface 500 of the packaging material shown in FIG. 5 also has an ear wing forming area 501 for forming the ear wing 603 as shown in FIG. 6 .
  • the second surface of the packaging material further includes a wing seal area.
  • the second surface of the packaging material further includes a wing seal area 511 or 512.
  • the ear wing sealing area can be the ear wing forming area 501, or it can be located in the ear wing forming area (for example, 511 is located in the ear wing forming area 501), or it can partially or completely cover the ear wing forming area.
  • the ear wing sealing area can also be located on the side wall corresponding to the ear wing forming area (for example, 512 is located on the side wall 601).
  • the second surface further includes a bottom forming area, such as the shaded portion 521 shown in FIG. 5 , for forming the bottom seal shown in FIG. 7 .
  • the filling equipment forms the bottom seal by folding the pre-crease lines.
  • the bottom forming area further includes a bottom sealing area, such as the shaded portion 521, or the longitudinal pre-crease line 533, the transverse pre-crease line, the transverse pre-crease line 534, and the oblique pre-crease lines 531, 532. area.
  • Figures 8 to 10 are another embodiment of making a packaging container based on the packaging material disclosed in the present application.
  • Figure 8 is a schematic diagram of an embodiment of the second surface of a packaging material according to the present application.
  • Figure 9 is a packaging container manufactured according to the packaging material shown in Figure 8.
  • Figure 10 is a schematic diagram of the bottom sealing of the packaging container shown in Figure 9.
  • the packaging material shown in Figure 8 is folded and filled to form the packaging container shown in Figures 9 and 10.
  • the final packaging container has a roof-shaped surface 903, and the ear wings 901 are bonded to the roof-shaped surface 903, and
  • the bottom surface 1001 adopts the method of ear wing fitting and sealing.
  • the second surface 800 of the packaging material shown in FIG. 8 also has an ear wing forming area 801 for forming the ear wing 901 as shown in FIG. 9 .
  • the second surface of the packaging material further includes a wing seal area.
  • the second surface of the packaging material further includes a wing seal area 511 or 512.
  • the ear wing sealing area can be the ear wing forming area 801, or it can be located in the ear wing forming area (for example, 811 is located in the ear wing forming area 801), or it can partially or completely cover the ear wing forming area.
  • the ear wing sealing area can also be located on the side wall corresponding to the ear wing forming area (for example, 812 is located on the side wall 903).
  • the second surface further includes a bottom forming area, such as the shaded portion 821 shown in FIG. 8 , for forming the bottom seal shown in FIG. 10 .
  • the filling equipment forms the bottom seal by folding the pre-crease lines.
  • the bottom forming area further includes a bottom sealing area, such as the shaded portion 821, or the area formed by the longitudinal pre-crease line 822, the transverse pre-crease line 813, the transverse pre-crease line 814, and the oblique pre-crease line 835. , or the area formed by the transverse pre-crease line 813, the oblique pre-crease line 835, and the oblique pre-crease line 836.
  • FIG 11 is a schematic structural diagram of the side wall connection of a packaging container according to an embodiment.
  • the packaging container such as a paper tube 001
  • the side wall 002 has a side wall sealing area 003, and the side wall sealing area 003 is formed by overlapping and pressing the first side area 004 and the second side area 005 of the packaging material, wherein, The first side area 004 is located inside the side wall sealing area 005, and the second side area 005 is located outside the side wall sealing area 003.
  • the inside of the side wall sealing area 003 is the inner wall side of the paper tube 001.
  • the inner wall side is used to directly contact the material in the accommodation space 1.
  • the outside of the side wall sealing area 003 is the outer wall side of the paper tube 001.
  • the outer wall side is facing the external space.
  • the side of is the observation surface of paper tube 001.
  • the base coating or protective layer is provided on at least part of the surface of the printing layer corresponding to the first side area, and is bonded to the heat sealing layer of the second side area; the protective layer Located on the outer surface of the side wall.
  • Figure 12 is a schematic structural cross-sectional view of a side wall sealing area.
  • the side wall sealing area includes a first side wall area A; the first side wall area A includes a first side wall area A.
  • One layer sequence, the first layer sequence includes a first wall layer 2, a second wall layer 3 and a third wall layer 4 arranged sequentially outward from the accommodation space 1; wherein, in the first side wall area A, the second wall layer 2
  • the wall layer 3 is connected to the third wall layer 4; wherein the first wall layer 2 includes a first heat sealing layer 21 and a first carrier layer 22 arranged sequentially outward from the accommodation space 1;
  • the second wall layer 3 includes a A second heat sealing layer 31 and a second carrier layer 32 are arranged sequentially outward from the accommodation space 1;
  • the third wall layer 4 includes a third heat sealing layer and a third carrier layer which are sequentially arranged outward from the accommodation space 1.
  • the layer thickness of the third carrier layer 41 is greater than the layer thickness of the second carrier layer 31, and/or the layer thickness of the third carrier layer 41 is greater than the layer thickness of the first carrier layer 21 .
  • the first carrier layer 22, the second carrier layer 32 and the third carrier layer 42 are all the sum of the remaining layers of the packaging material except the heat sealing layer.
  • the side wall of the side wall sealing area also includes a second side wall area B adjacent to the first side wall area A, and the second side wall area B includes a second layer sequence, where , as shown in Figure 3, the second layer sequence includes a first wall layer 2, a second wall layer 3 and a third wall layer 4 arranged sequentially outward from the accommodation space 1; wherein, in the second side wall area B , the first wall layer 2 is connected to the second wall layer 3, and the second wall layer is connected to the third wall layer; and in the second side wall area B, the layer thickness of the second carrier layer 31 is smaller than that of the first carrier layer 21
  • the layer thickness, or the layer thickness of the second carrier layer 31 is smaller than the layer thickness of the third carrier layer 41 , or the layer thickness of the second carrier layer 31 is simultaneously smaller than the respective layers of both the first carrier layer 21 and the third carrier layer 41 thickness.
  • the side wall of the side wall sealing area also includes a third side wall area C.
  • the third side wall area C to be provided in the side wall, the side wall in the longitudinal direction
  • the structural shape formed at the seam is to set the structural shape formed at the longitudinal seam. As shown in Figure 3, it can be in the first side wall region C.
  • a third side wall area C is provided on one side of A, and the third side wall area C is adjacent to the first side wall area A.
  • the third side wall area includes a third layer sequence, which includes a first wall layer 2 and a third wall layer 4 arranged sequentially outward from the accommodation space 1; wherein, in the third side wall area C, the first wall layer Layer 2 is connected to the third wall layer 4 ; and in the third side wall region C the layer thickness of the first carrier layer 21 is the same as the layer thickness of the third carrier layer 41 .
  • the surface of the first wall layer used for connection with the third wall layer is provided with the base coating or protective layer, and the base coating or protective layer is bonded to the heat sealing layer of the third wall layer ;
  • the base coating or protective layer is provided on the outer surface of the packaging container, such as a packaging box. After testing, the bonding strength of the sealing area on the side wall of the packaging box is greater than 80N/15mm, which meets the usage requirements.
  • the primer layer is used to bond with part of the heat sealing layer of the packaging material to achieve sealing of the packaging material.
  • the protective layer can be located on the side wall surface of the packaging container to protect the printing The layer is not damaged.
  • This structure can be used to replace the traditional outer PE layer.
  • the coating amount of the protective layer and the base coat is 1-5g/m 2 , and the coating amount is Less, when recycling, it no longer needs to be separated from the cardboard layer, but directly enters the recycling process of the cardboard layer. As a result, the separation process from the cardboard layer can be reduced, the recycling process of the packaging box can be simplified, and the difficulty and cost of recycling can be reduced. At the same time, the environmental protection of the packaging box can be improved and environmental pollution can be reduced.
  • the embodiments of the present application also provide a method for preparing the above-mentioned packaging material.
  • the preparation method may include the following steps:
  • the cardboard layer is laminated with the barrier layer and the heat sealing layer in sequence, and then the printing layer is formed on the side of the cardboard layer away from the barrier layer through a gravure printing process, and then the printing layer is The protective layer and the undercoat layer are respectively formed on the surface through a gravure printing process.
  • the printing layer is directly printed on the surface of the cardboard layer.
  • the barrier layer can be directly compounded with the surface of the cardboard layer, or can be compounded with the cardboard layer through the first adhesive layer.
  • the barrier layer When the barrier layer is compounded with the cardboard layer through the first adhesive layer, it can be first coated on the surface of the cardboard layer to form a third layer. an adhesive layer, and then the barrier layer is compounded on the surface of the first adhesive layer.
  • the heat sealing layer can be directly compounded with the barrier layer, or can be compounded with the barrier layer through a second adhesive layer. When the heat sealing layer is compounded with the barrier layer through the second adhesive layer, the second adhesive layer can be coated on the surface of the barrier layer, and then the heat sealing layer is compounded on the surface of the second adhesive layer.
  • the viscosity of the protective coating used to form the protective layer is ASTM Under D4212-93 standard, it is 14-23 seconds/Cai En Cup 2#, and the printing speed is 400-800m/min.
  • the viscosity of the primer slurry used to form the primer layer is 14-23 seconds/Zai En Cup 2# under ASTM D4212-93 standard, and the printing speed is 400-800m /min.
  • the primer layer When preparing the primer layer, stir the self-crosslinking water-based acrylic resin used to form the base coat, 0.05%-1% defoaming agent, and 0.1%-1% leveling agent evenly, then add 5%-5% of the resin weight 10% water, diluted to printing viscosity, to achieve fast printing requirements of printing speed 400-800m/min.

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Abstract

本申请涉及包装材料领域，公开一种包装材料及其制备方法、包装容器。该包装材料包括纸板层，所述纸板层包括第一表面和第二表面，其中：所述包装材料包括在所述第一表面的一侧沿第一方向设置的阻隔层和热封层；所述包装材料在所述第二表面的一侧沿第二方向不含有聚乙烯层，其中所述第一方向和所述第二方向在同一直线上且方向相反。该包装材料具有回收难度小、回收成本低且对环境更为友好的特点。

Description

包装材料及其制备方法、包装容器
相关申请的交叉引用
本申请要求在2022年03月30日提交中国专利局、申请号为202210333829.8、申请名称为“包装材料及其制备方法、包装容器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及包装领域，特别涉及一种包装材料及其制备方法、包装容器。
背景技术
目前罐状包装盒和瓶装包装盒由于不能直接印刷信息和促销信息，因此，在很多包装领域，还需要使用柔性包装材料，例如纸质包装材料制作包装盒。现有的纸质包装材料中，印刷层设置于纸板层的外层，即在远离容器内部空间的一侧，且在印刷层的外层还需要设置一层PE层，以保护印刷层不被损坏，同时在制作包装盒时，还可与纸板层的内层的热封层粘结，以形成密闭的包装盒。
其中，外层的PE层，其密度一般为10-15g/m2，由于外层PE层的涂覆量较大，因此，在包装盒的回收过程中，需要将外层PE层与纸板层分离，然后再分别回收纸板和PE层，这无疑增加了回收难度，增加了回收能耗和回收成本，另外，对于未回收的包装盒，大量的PE材料的存在也会造成环境污染。
发明内容
本申请公开了一种包装材料及其制备方法、包装容器，以解决现有包装材料因外层PE含量较高造成的回收难度大、回收成本高且易造成环境污染的问题。
为达到上述目的，本申请提供以下技术方案：
第一方面，本申请提供一种包装材料，该包装材料包括纸板层，所述纸板层包括第一表面和第二表面，其中：所述包装材料包括在所述第一表面的一侧沿第一方向设置的阻隔层和热封层；所述包装材料在所述第二表面的一侧沿第二方向不含有聚乙烯层，其中所述第一方向和所述第二方向在同一直线上且方向相反。
进一步地，所述包装材料在所述第二表面的一侧包括印刷层，所述印刷层包含水性油墨或溶剂型油墨。
进一步地，所述包装材料在所述第二表面的一侧沿第二方向进一步包括防护层，其中所述防护层为非聚乙烯层，所述防护层的涂覆量为1-5g/m2。
进一步地，所述包装材料在所述第二表面的一侧沿第二方向进一步包括底涂层，其中所述底涂层为非聚乙烯层，所述底涂层热封合强度大于所述防护层，所述底涂层的涂覆量为1-5g/m2。
进一步地，所述第二表面包括第一区域和第二区域，其中，所述第一区域至少为包装材料的底部封合区、耳翼封合区或侧壁封接区中的一种，所述第二区域为第二表面除第一区域外剩余的区域，所述包装材料至少包括以下情况的一种：
a.所述底涂层至少部分覆盖所述第一区域；
b.所述防护层至少部分覆盖所述第二区域；
c.所述底涂层至少部分覆盖所述第二区域；
d.所述防护层至少部分覆盖所述第一区域。
进一步地，所述防护层由水性树脂乳液形成，所述水性树脂乳液中的固体颗粒的粒径为0.2-0.9um。
进一步地，所述水性树脂乳液包括以下组分：丙烯酸型的树脂乳液、消泡剂和流平剂。
进一步地，所述底涂层的原料包括：硬性自交联丙烯酸乳液、软性自交联丙烯酸乳液、流平剂、消泡剂与水。
进一步地，所述包装材料的第二表面的静摩擦系数为0.310-0.352；所述 包装材料的第二表面的动摩擦系数为0.162-0.198。
进一步地，所述防护层或所述底涂层通过凹版印刷工艺形成于所述印刷层的表面。
第二方面，本申请提供一种上述包装材料的制备方法，包括以下步骤：
所述纸板层依次与所述阻隔层和所述热封层叠层复合，然后在所述纸板层的背离所述阻隔层的一侧通过凹版印刷工艺形成所述印刷层，再在所述印刷层的表面通过凹版印刷工艺分别形成所述防护层和所述底涂层。
进一步地，用于形成所述防护层的防护涂料的粘度为ASTM D4212-93号标准下14-23秒/蔡恩杯2#，印刷速度为400-800m/min。
进一步地，用于形成所述底涂层的底涂浆料的黏度为在ASTM D4212-93号标准下14-23秒/蔡恩杯2#，印刷速度为400-800m/min。
第三方面，本申请提供一种包装容器，该包装容器利用上述包装材料封接形成，所述包装容器包括侧壁，所述侧壁围绕形成有容置空间，所述侧壁具有侧壁封接区，所述侧壁封接区由所述包装材料的第一侧边区和第二侧边区交叠压合形成。
进一步地，所述侧壁封接区通过第一侧边区对应的防护层和第二侧边区对应的热封层粘合形成。
进一步地，所述侧壁封接区通过第一侧边区对应的底涂层或防护层和第二侧边区对应的热封层粘合形成。
进一步地，所述侧壁封接区包括第一侧壁区域、第二侧壁区域和第三侧壁区域；
所述第一侧壁区域包括第一层序列，所述第一层序列包括自所述容置空间向外依次设置的第一壁层、第二壁层和第三壁层；其中，在所述第一侧壁区域中，所述第二壁层由所述第一壁层弯折后向靠近所述第一壁层的方向弯折形成，所述第二壁层与所述第三壁层连接；
所述第一壁层包括沿自所述容置空间向外依次设置的第一热封层和第一载体层；
所述第二壁层包括沿自所述容置空间向外依次设置的第二载体层和第二热封层；
所述第三壁层包括沿自所述容置空间向外依次设置的第三热封层和第三载体层；
在所述第一侧壁区域中，所述第三载体层的层厚度大于所述第二载体层的层厚度，和/或，所述第三载体层的层厚度大于所述第一载体层的层厚度；
所述第二侧壁区域包括第二层序列，所述第二层序列包括有自所述容置空间向外依次设置的所述第一壁层、所述第二壁层和所述第三壁层；
其中，所述第二侧壁区域中，所述第一壁层与所述第二壁层连接，所述第二壁层与所述第三壁层连接；且在所述第二侧壁区域中，所述第二载体层的层厚度小于所述第一载体层的层厚度，和/或，所述第二载体层的层厚度小于所述第三载体层的层厚度；所述第一载体层、所述第二载体层和所述第三载体层为所述包装材料除所述热封层之外的剩余层的总和；
所述第三侧壁区域包括第三层序列，所述第三层序列包括有自所述容置空间向外依次设置的所述第一壁层和所述第三壁层，且在所述第三侧壁区域中，所述第一壁层与所述第三壁层连接；所述第一壁层的用于和所述第三壁层连接的表面设有所述底涂层或防护层；所述防护层设于所述包装容器的外表面。
进一步地，所述包装容器包括顶部、底部以及设于所述顶部和所述底部之间的所述侧壁；所述底部设有底部封合区，所述底部封合区的粘结区域设有所述底涂层或防护层；所述包装容器的外表面设有所述防护层。
进一步地，所述顶部设有耳翼封合区，所述耳翼封合区包括耳翼，所述耳翼自所述包装容器的顶面向所述侧壁弯折后与所述侧壁连接；
所述耳翼朝向所述侧壁的表面设有所述底涂层，和/或，所述侧壁用于与所述耳翼连接的表面设有所述底涂层。
采用本申请的技术方案，产生的有益效果如下：
本申请的包装材料，由于在第二表面的第二方向上不含聚乙烯层，因此， 在回收时，可不用再与纸板层分离，而直接进入纸板层的回收过程中。由此，可减少与纸板层的分离工艺，简化了包装盒的回收工艺，降低回收难度和回收成本，同时，可提高包装盒的环保性，减少环境污染。
附图说明
图1为本申请一种实施例的包装材料的结构示意图；
图2为本申请一种实施例包装材料的第二表面的示意图；
图3为本申请一种的包装容器的结构示意图；
图4为本申请一种实施例包装容器的底部封合示意图；
图5为本申请另一种实施例包装材料的第二表面的示意图；
图6为本申请另一种的包装容器的结构示意图；
图7为本申请另一种实施例包装容器的底部封合示意图；
图8为本申请另一种实施例包装材料的第二表面的示意图；
图9为本申请另一种的包装容器的结构示意图；
图10为本申请另一种实施例包装容器的底部封合示意图；
图11为本申请一种实施例中侧壁封接区的结构示意图；
图12为本申请一种实施例中侧壁封接区的截面结构示意图。
具体实施方式
下面将结合本申请实施例，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是：本申请中，如果没有特别的说明，本文所提到的所有实施方式以及优选实施方法可以相互组合形成新的技术方案。本申请中，如果没有特别的说明，本文所提到的所有技术特征以及优选特征可以相互组合形成新的技术方案。本申请中，如果没有特别的说明，百分数(％)或者份指的 是相对于组合物的重量百分数或重量份。本申请中，如果没有特别的说明，所涉及的各组分或其优选组分可以相互组合形成新的技术方案。本申请中，除非有其他说明，数值范围“a～b”表示a到b之间的任意实数组合的缩略表示，其中a和b都是实数。例如数值范围“6～22”表示本文中已经全部列出了“6～22”之间的全部实数，“6～22”只是这些数值组合的缩略表示。本申请所公开的“范围”以下限和上限的形式，可以分别为一个或多个下限，和一个或多个上限。本申请中，除非另有说明，各个反应或操作步骤可以顺序进行，也可以按照顺序进行。优选地，本文中的反应方法是顺序进行的。
除非另有说明，本文中所用的专业与科学术语与本领域熟练人员所熟悉的意义相同。此外，任何与所记载内容相似或均等的方法或材料也可应用于本申请中。
本申请实施例提供一种包装材料，如图1所示，该包装材料包括纸板层101。纸板层101的一侧，即第一表面101a，延第一方向D1，设有依次叠层设置的阻隔层103和热封层104。所述纸板层101的另一侧表面，即第二表面101b，设有印刷层102。印刷层102可以包含水性油墨或溶剂型油墨。第一方向D1和所述第二方向D2在同一直线(例如，在纸板层101的厚度方向)上且方向相反。包装材料在第二表面101b的一侧沿第二方向D2不含有聚乙烯层。现有技术中，在纸板层101的第二表面101b，会设有一层聚乙烯层，位于印刷层102和纸板层101之间，或者位于印刷层102远离纸板层101的一侧。本申请的一个主要的技术方案为，通过具有热封合性的树脂替代上述现有技术中的聚乙烯层，这样不仅降低了聚乙烯的用量，更有利于环保，同时也降低了生产成本。
如图1所示，阻隔层103可为Al层，也可为非金属阻隔层，例如可以为高密度聚乙烯(high density polyethylene，HDPE)、低密度聚乙烯(low density polyethylene，LDPE)、聚乙烯醇(polyvinyl alcohol vinylalcohol polymer，PVOH)、乙烯-乙烯醇共聚物(EVOH)、聚偏二氯乙烯(poly vinylidene chloride，PVDC)、尼龙(polyamide，PA)、聚对苯二甲酸乙二醇酯(polyethylene glycol terephthalate， PET)或其组合等。
热封层104包括低密度聚乙烯LDPE与茂金属聚乙烯的复合层，或者线性低密度聚乙烯LLDPE与茂金属聚乙烯的复合层，其中，茂金属聚乙烯在热封层中的质量占比例如可以为35％-95％。
参照图1，在一种可选的实现方式中，纸板层101和阻隔层103之间可设置第一粘结层105，阻隔层103和热封层104之间可设置第二粘结层106。
其中，第一粘结层或第二粘结层可为聚烯烃材料层(例如聚乙烯等)，也可以为聚乙烯-马来酸酐接枝聚合物(EMAH)，乙烯-丙烯酸共聚物(EAA)或乙烯-甲基丙烯酸共聚物(EMAA)等。
纸板层可选自硬纸板、纸板和纸中的一种或者其至少两种的组合组成，用于印刷各种图案和字符等。
印刷层为油墨层，覆盖于纸板层表面，以形成各种所需图案、文字和符号。
包装材料在第二表面101b的一侧沿第二方向D2进一步包括防护层108，其中防护层108为非聚乙烯层，所述防护层的涂覆量为1-5g/m2。防护层108具有一定的热封性能，同时能起到阻水以及保护纸层101的作用。防护层108由水性树脂乳液形成，所述水性树脂乳液中的固体颗粒的粒径为0.2-0.9um。水性树脂乳液包括以下组分：丙烯酸型的树脂乳液、消泡剂和流平剂。
包装材料在所述第二表面101b的一侧沿第二方向D2可以进一步包括底涂层107，其中所述底涂层107为非聚乙烯层，所述底涂层107的涂覆量为1-5g/m2。底涂层107具有一定的热封性能，同时能起到阻水以及保护纸层101的作用。底涂层107由水性树脂乳液形成，所述水性树脂乳液中的固体颗粒的粒径为0.2-0.9um。水性树脂乳液包括以下组分：丙烯酸型的树脂乳液、消泡剂和流平剂。
防护层108和底涂层107的一个区别在于，两者热封强度不同。底涂层107的热封强度大于防护层108。具体来说，构成底涂层107的材料，比构成防护层108的丙烯酸，其官能团化程度更高(例如，具有更多的羧基和羟基 基团)，从而使得底涂层107的热封强度大于防护层108。对于本申请中涉及的包装材料，不同的位置需要的热封强度不相同，为了节省成本的同时保证包装材料在使用时的密封强度，可以在第二表面101b的不同位置配置防护层108和底涂层107。在一些实施例中，在第二表面101b，底涂层107和防护层108的质量比可以为1：15～1：1之间，优选的范围为1：10～1：5，更优选的范围为1：9～1：4。
其中，包装材料的第二表面的静摩擦系数为0.310-0.352，包装材料的第二表面为与纸板层的第二表面所在同一侧的表面。包装材料的第二表面的动摩擦系数为0.162-0.198。可利用摩擦系数测定仪测量包装材料的上述静摩擦系数和动摩擦系数。例如，常温下，如20-30℃，测试静摩擦系数和动摩擦系数时，在两片包装材料的第二表面重叠且接触的状态下，可在63.5mm×63.5mm的区域负载3000g的测试条件下进行测量。
根据本申请的一个实施例，在包装材料表面根据具体的需要设置防护层108或者底涂层107。第二表面101b可以包括第一区域和第二区域。第一区域的封合涂层的热封性要高于第二区域封合涂层的热封性。第一区域至少为包装材料的底部封合区、耳翼封合区或侧壁封接区中的一种，第二区域为第二表面除第一区域外剩余的区域。
图2至图4为根据本申请披露的包装材料制作包装容器的一种实施例。如图2为根据本申请的一种包装材料的第二表面一种实施例的示意图。图3为根据图2所示的包装材料制造的包装容器所示。图4为图3所示的包装底部封合示意图。图2所示的包装材料经过折叠和灌装形成图3和图4所示的包装容器。
第二表面101b可以包含多条预折痕线，预折痕线有利于包装材料在灌装机上被折叠为如图3所示的包装。如图2所示，第二表面可以包括横向预折痕线211、212、213或214中的一个或多个。第二表面可以包括纵向预折痕线221、222、223或224的一个或多个。第二表面可以包括斜向预折痕线231、232、233、234、235、236、237或238的一个或多个。
结合图3，第二表面进一步包括由预折痕线形成的侧面241、242、243和244。经过灌装机的折叠灌装后，形成包装容器的侧壁，例如包装侧壁311。
第二表面进一步包含第一侧边区239和第二侧边区240。第一侧边区239和第二侧边区240通过对接和/或搭接的方式形成如图3或图4所示的中封区302。第二表面不含有聚乙烯层(例如通过淋膜形成的或者层压复合形成的聚乙烯层)。相应的，为了满足热封成包装容器的需求，第二表面可以覆盖如图1所述的防护层和/或底涂层。
第二表面进一步包含耳翼形成区域，例如如图3所示，横向预折痕线211、横向预折痕线212、纵向预折痕线221、纵向预折痕线222结合斜向预折痕线231、232共同形成耳翼形成区域，耳翼形成区域用来形成图3所示的耳翼301。在包装过程中，耳翼301需要粘在侧壁311上。因此，包装材料的第二表面进一步包含耳翼封合区。耳翼封合区可以位于耳翼成型区内，也可以位于与耳翼成型区相邻的侧壁区域。例如，在图2中，包装材料第二表面进一步包含耳翼封合区251、252、253或254。耳翼封合区可以位于耳翼形成区(例如251或253)，可以部分或者全部覆盖耳翼形成区。耳翼封合区也可以位于耳翼形成区对应的侧壁上(例如252或254)。
由于在灌装设备上对耳翼封合的难度大于对中封封合的强度，因此在一些实施例中，耳翼封合区所需要的热封强度大于第一侧边区239或第二侧边区240，因此图1所述的防护层108可以至少部分覆盖第一侧边区239或第二侧边区240，底涂层107可以至少部分覆盖耳翼封合区。
第二表面进一步包含底部形成区域，如图2所述的阴影部分261，用于形成图4所示的底封。灌装设备通过折叠预折痕线(例如213、214、235、236、237、238)形成底封。进一步的，底部形成区域进一步包括底部封合区。例如阴影部分261，或者纵向预折痕线221、横向预折痕线213、横向预折痕线214、斜向预折痕线235形成的区域，或者横向预折痕线213、斜向预折痕线235、斜向预折痕线236形成的区域。
由于在灌装设备上对底部封合的难度大于对中封封合的强度，因此在一 些实施例中，底部封合区所需要的热封强度大于第一侧边区或第二侧边区，因此图1所述的防护层可以至少部分覆盖第一侧边区或第二侧边区，底涂层可以至少部分覆盖底部封合区。
第二表面可以包括第一区域和第二区域。第一区域的封合涂层的热封性要高于第二区域封合涂层的热封性。第一区域至少为包装材料的底部封合区、耳翼封合区或侧壁封接区中的一种，第二区域为第二表面除第一区域外剩余的区域。
图5至图7为根据本申请披露的包装材料制作包装容器的另一种实施例。如图5为根据本申请的一种包装材料的第二表面一种实施例的示意图。图6为根据图5所示的包装材料制造的包装容器所示。图7为图6所示的包装容器的底部封合示意图。图5所示的包装材料经过折叠和灌装形成图6和图7所示的包装容器。与图2至图4的实施例相比，其中的一个区别在于，如图6所示，最终形成的包装容器具有一个大致呈弧形环绕的侧面601，其对应的一条棱602为带有圆弧的形状。所谓弧形环绕指的是指，如图6所示，在21或22处，与图3的棱340相比，其对应的棱至少要一部分带倒角。
图5所示的包装材料的第二表面500同样具有耳翼形成区501，用来形成如图6所示的耳翼603。在包装过程中，耳翼603需要粘在侧壁601上。因此，包装材料的第二表面进一步包含耳翼封合区。例如，在图5中，包装材料第二表面进一步包含耳翼封合区511或512。耳翼封合区可以为耳翼形成区501，也可以位于耳翼形成区(例如511位于耳翼形成区501内)，也可以部分或者全部覆盖耳翼形成区。耳翼封合区也可以位于耳翼形成区对应的侧壁上(例如512位于侧壁601上)。
第二表面进一步包含底部形成区域，如图5所述的阴影部分521，用于形成图7所示的底封。灌装设备通过折叠预折痕线形成底封。进一步的，底部形成区域进一步包括底部封合区，例如阴影部分521，或者纵向预折痕线533、横向预折痕线、横向预折痕线534、斜向预折痕线531、532形成的区域。
图8至图10为根据本申请披露的包装材料制作包装容器的另一种实施例。 如图8为根据本申请的一种包装材料的第二表面一种实施例的示意图。图9为根据图8所示的包装材料制造的包装容器。图10为图9所示的包装容器底部封合示意图。图8所示的包装材料经过折叠和灌装形成图9和图10所示的包装容器。与图2至图4的实施例相比，其中的一个区别在于，如图9所示，最终形成的包装容器具有一个屋顶型的面903，耳翼901粘接在屋顶型面903上，以及底面1001采用耳翼贴合密封的方式。
图8所示的包装材料的第二表面800同样具有耳翼形成区801，用来形成如图9所示的耳翼901。在包装过程中，耳翼901需要粘在侧壁903上。因此，包装材料的第二表面进一步包含耳翼封合区。例如，在图8中，包装材料第二表面进一步包含耳翼封合区511或512。耳翼封合区可以为耳翼形成区801，也可以位于耳翼形成区(例如811位于耳翼形成区801内)，也可以部分或者全部覆盖耳翼形成区。耳翼封合区也可以位于耳翼形成区对应的侧壁上(例如812位于侧壁903上)。
第二表面进一步包含底部形成区域，如图8所述的阴影部分821，用于形成图10所示的底封。灌装设备通过折叠预折痕线形成底封。进一步的，底部形成区域进一步包括底部封合区，例如阴影部分821，或者纵向预折痕线822、横向预折痕线813、横向预折痕线814、斜向预折痕线835形成的区域，或者横向预折痕线813、斜向预折痕线835、斜向预折痕线836形成的区域。
下面将结合图11和图12对包装容器的侧壁封接区做进一步详细说明。图11为一种实施例包装容器的侧壁连接处的结构示意图，如图11所示，该包装容器，例如纸筒001，包括侧壁002，所述侧壁002围绕形成有容置空间1，所述侧壁002具有侧壁封接区003，所述侧壁封接区003由所述包装材料的第一侧边区004和第二侧边区005交叠压合形成，其中，所述第一侧边区004位于所述侧壁封接区005的内侧，所述第二侧边区005位于所述侧壁封接区003的外侧。侧壁封接区003的内侧为纸筒001的内壁侧，内壁侧用于直接和容置空间1的物质接触，封接区003的外侧为纸筒001的外壁侧，外壁侧为朝向外部空间的一侧，为纸筒001的观察面。
其中，底涂层或者防护层设于所述第一侧边区对应的至少部分所述印刷层的表面，并与所述第二侧边区的所述热封层粘结；所述防护层设于所述侧壁的外表面。
图12为一种侧壁封接区的结构截面示意图，在本申请的一种实施例中，参考图12，侧壁封接区包括第一侧壁区域A；第一侧壁区域A包括第一层序列，第一层序列包括自容置空间1向外依次设置的第一壁层2、第二壁层3和第三壁层4；其中，在第一侧壁区域A中，第二壁层3与第三壁层4连接；其中，第一壁层2包括沿自容置空间1向外依次设置的第一热封层21和第一载体层22；第二壁层3包括沿自容置空间1向外依次设置的第二热封层31和第二载体层32；第三壁层4包括沿自容置空间1向外依次设置的第三热封层和第三载体层42；在第一侧壁区域A中，第三载体层41的层厚度大于第二载体层31的层厚度，和/或，第三载体层41的层厚度大于第一载体层21的层厚度。其中，所述第一载体层22、所述第二载体层32和所述第三载体层42均为所述包装材料除所述热封层之外的剩余层的总和。
继续参照图12，在上述纸筒中上，侧壁封接区的侧壁还包括与第一侧壁区域A邻接的第二侧壁区域B，第二侧壁区域B包括第二层序列，其中，如图3所示，第二层序列包括有自容置空间1向外依次设置的第一壁层2、第二壁层3和第三壁层4；其中，第二侧壁区域B中，第一壁层2与第二壁层3连接，第二壁层与第三壁层连接；且在第二侧壁区域B中，第二载体层31的层厚度小于第一载体层21的层厚度，或，第二载体层31的层厚度小于第三载体层41的层厚度，或者第二载体层31的层厚度同时小于第一载体层21和第三载体层41两者各自的层厚度。
继续参照图12，在本实施例的纸筒中，侧壁封接区的侧壁还包括第三侧壁区域C，对于在侧壁中设置第三侧壁区域C，使的侧壁中在纵向接缝处形成的结构形状有多种选择方式，其中，作为第三侧壁区域C设置纵缝接缝处形成的结构形状一种实施方式，如图3所示，可以在第一侧壁区域A的一侧设置第三侧壁区域C，且第三侧壁区域C与第一侧壁区域A邻接，第三侧壁区 域包括第三层序列，该第三层序列包括有自容置空间1向外依次设置的第一壁层2、和第三壁层4；其中，第三侧壁区域C中，第一壁层2与第三壁层4连接；且在第三侧壁区域C中，第一载体层21的层厚度与第三载体层41的层厚度相同。
其中，所述第一壁层的用于和所述第三壁层连接的表面设有所述底涂层或防护层，该底涂层或者防护层和第三壁层的热封层粘结；所述底涂层或防护层设于所述包装容器，如包装盒的外表面。经测试，包装盒侧壁封接区的粘结强度大于80N/15mm，满足使用要求。
在利用本申请的包装材料形成包装容器后，底涂层用于与包装材料的部分热封层粘结，实现包装材料的封合，防护层可位于包装容器的侧壁表面，用于保护印刷层不受损伤，利用该结构，可替代传统的外层PE层，且本申请实施例的包装材料中，防护层和底涂层的涂覆量均为1-5g/m2，涂覆量较少，在回收时，可不用再与纸板层分离，而直接进入纸板层的回收过程中。由此，可减少与纸板层的分离工艺，简化了包装盒的回收工艺，降低回收难度和回收成本，同时，可提高包装盒的环保性，减少环境污染。
本申请实施例还提供一种上述包装材料的制备方法，该制备方法可包括以下步骤：
所述纸板层依次与所述阻隔层和所述热封层叠层复合，然后在所述纸板层的背离所述阻隔层的一侧通过凹版印刷工艺形成所述印刷层，再在所述印刷层的表面通过凹版印刷工艺分别形成所述防护层和所述底涂层。
其中，印刷层直接印刷在纸板层的表面。阻隔层可直接与纸板层的表面复合，也可通过第一粘结层与纸板层复合，当阻隔层通过第一粘结层与纸板层复合时，可先在纸板层的表面涂覆形成第一粘结层，然后再将阻隔层复合在第一粘结层的表面。热封层可直接与阻隔层复合，也可通过第二粘结层与阻隔层复合。当热封层通过第二粘结层与阻隔层复合时，可在阻隔层的表面涂覆形成第二粘结层，然后再将热封层复合在第二粘结层的表面。
在一种可选的实施例中，用于形成所述防护层的防护涂料的粘度为ASTM  D4212-93号标准下14-23秒/蔡恩杯2#，印刷速度为400-800m/min。
在制备防护层时，将用于形成防护层的水性丙烯酸树脂、消泡剂、流平剂搅拌均匀后，加入树脂重量50％-100％的水，稀释至印刷粘度，从而实现印刷速度400-800m/min的快速印刷的要求。
在一种可选的实施例中，用于形成所述底涂层的底涂浆料的黏度为ASTM D4212-93号标准下14-23秒/蔡恩杯2#，印刷速度为400-800m/min。
在制备底漆层时，将用于形成底涂层的自交联型水性丙烯酸树脂、0.05％-1％消泡剂、0.1％-1％流平剂搅拌均匀后，加入树脂重量5％-10％的水，稀释至印刷粘度，实现印刷速度400-800m/min的快速印刷的要求。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (19)

  1. 一种包装材料，其特征在于，包括纸板层，所述纸板层包括第一表面和第二表面，其中：
    所述包装材料包括在所述第一表面的一侧沿第一方向设置的阻隔层和热封层；
    所述包装材料在所述第二表面的一侧沿第二方向不含有聚乙烯层，其中所述第一方向和所述第二方向在同一直线上且方向相反。
  2. 根据权利要求1所述的包装材料，其特征在于，
    所述包装材料在所述第二表面的一侧包括印刷层，所述印刷层包含水性油墨或溶剂型油墨。
  3. 根据权利要求2所述的包装材料，其特征在于，
    所述包装材料在所述第二表面的一侧沿第二方向进一步包括防护层，其中所述防护层为非聚乙烯层，所述防护层的涂覆量为1-5g/m2。
  4. 根据权利要求3所述的包装材料，其特征在于，
    所述包装材料在所述第二表面的一侧沿第二方向进一步包括底涂层，其中所述底涂层为非聚乙烯层，所述底涂层热封合强度大于所述防护层，所述底涂层的涂覆量为1-5g/m2。
  5. 根据权利要求4所述的包装材料，其特征在于，
    所述第二表面包括第一区域和第二区域，其中，所述第一区域至少为所述包装材料的底部封合区、耳翼封合区或侧壁封接区中的一种，所述第二区域为第二表面除第一区域外剩余的区域，所述包装材料至少包括以下情况的一种：
    a.所述底涂层至少部分覆盖所述第一区域；
    b.所述防护层至少部分覆盖所述第二区域；
    c.所述底涂层至少部分覆盖所述第二区域；
    d.所述防护层至少部分覆盖所述第一区域。
  6. 根据权利要求4所述的包装材料，其特征在于，所述防护层由水性树脂乳液形成，所述水性树脂乳液中的固体颗粒的粒径为0.2-0.9um。
  7. 根据权利要求6所述的包装材料，其特征在于，所述水性树脂乳液包括以下组分：丙烯酸型的树脂乳液、消泡剂和流平剂。
  8. 根据权利要求4所述的包装材料，其特征在于，所述底涂层的原料包括：硬性自交联丙烯酸乳液、软性自交联丙烯酸乳液、流平剂、消泡剂与水。
  9. 根据权利要求4所述的包装材料，其特征在于，所述包装材料的第二表面的静摩擦系数为0.310-0.352；所述包装材料的第二表面的动摩擦系数为0.162-0.198。
  10. 根据权利要求4-9任一项所述的包装材料，其特征在于，所述防护层或所述底涂层通过凹版印刷工艺形成于所述印刷层的表面。
  11. 一种如权利要求4-10任一项所述的包装材料的制备方法，其特征在于，包括以下步骤：
    所述纸板层依次与所述阻隔层和所述热封层叠层复合，然后在所述纸板层的背离所述阻隔层的一侧通过凹版印刷工艺形成所述印刷层，再在所述印刷层的表面通过凹版印刷工艺分别形成所述防护层和所述底涂层。
  12. 根据权利要求11所述的制备方法，其特征在于，用于形成所述防护层的防护涂料的粘度为ASTM D4212-93号标准下14-23秒/蔡恩杯2#，印刷速度为400-800m/min。
  13. 根据权利要求11所述的制备方法，其特征在于，用于形成所述底涂层的底涂浆料的黏度为在ASTM D4212-93号标准下14-23秒/蔡恩杯2#，印刷速度为400-800m/min。
  14. 一种包装容器，其特征在于，利用如权利要求4-10任一项所述的包装材料封接形成，所述包装容器包括侧壁，所述侧壁围绕形成有容置空间，所述侧壁具有侧壁封接区，所述侧壁封接区由所述包装材料的第一侧边区和第二侧边区交叠压合形成。
  15. 根据权利要求14所述的包装容器，其特征在于，所述侧壁封接区通 过第一侧边区对应的防护层和第二侧边区对应的热封层粘合形成。
  16. 根据权利要求14所述的包装容器，其特征在于，所述侧壁封接区通过第一侧边区对应的底涂层或防护层和第二侧边区对应的热封层粘合形成。
  17. 根据权利要求14所述的包装容器，其特征在于，所述侧壁封接区包括第一侧壁区域、第二侧壁区域和第三侧壁区域；
    所述第一侧壁区域包括第一层序列，所述第一层序列包括自所述容置空间向外依次设置的第一壁层、第二壁层和第三壁层；其中，在所述第一侧壁区域中，所述第二壁层由所述第一壁层弯折后向靠近所述第一壁层的方向弯折形成，所述第二壁层与所述第三壁层连接；
    所述第一壁层包括沿自所述容置空间向外依次设置的第一热封层和第一载体层；
    所述第二壁层包括沿自所述容置空间向外依次设置的第二载体层和第二热封层；
    所述第三壁层包括沿自所述容置空间向外依次设置的第三热封层和第三载体层；
    在所述第一侧壁区域中，所述第三载体层的层厚度大于所述第二载体层的层厚度，和/或，所述第三载体层的层厚度大于所述第一载体层的层厚度；
    所述第二侧壁区域包括第二层序列，所述第二层序列包括有自所述容置空间向外依次设置的所述第一壁层、所述第二壁层和所述第三壁层；
    其中，所述第二侧壁区域中，所述第一壁层与所述第二壁层连接，所述第二壁层与所述第三壁层连接；且在所述第二侧壁区域中，所述第二载体层的层厚度小于所述第一载体层的层厚度，和/或，所述第二载体层的层厚度小于所述第三载体层的层厚度；所述第一载体层、所述第二载体层和所述第三载体层为所述包装材料除所述热封层之外的剩余层的总和；
    所述第三侧壁区域包括第三层序列，所述第三层序列包括有自所述容置空间向外依次设置的所述第一壁层和所述第三壁层，且在所述第三侧壁区域中，所述第一壁层与所述第三壁层连接；所述第一壁层的用于和所述第三壁 层连接的表面设有所述底涂层或防护层；所述防护层设于所述包装容器的外表面。
  18. 根据权利要求14-17任一项所述的包装容器，其特征在于，所述包装容器包括顶部、底部以及设于所述顶部和所述底部之间的所述侧壁；所述底部设有底部封合区，所述底部封合区的粘结区域设有所述底涂层或防护层；所述包装容器的外表面设有所述防护层。
  19. 根据权利要求18所述的包装容器，其特征在于，所述顶部设有耳翼封合区，所述耳翼封合区包括耳翼，所述耳翼自所述包装容器的顶面向所述侧壁弯折后与所述侧壁连接；
    所述耳翼朝向所述侧壁的表面设有所述底涂层，和/或，所述侧壁用于与所述耳翼连接的表面设有所述底涂层。
PCT/CN2023/084322 2022-03-30 2023-03-28 包装材料及其制备方法、包装容器 WO2023185815A1 (zh)

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