WO2014000631A1 - Film de pré-enduction et procédé de préparation de celui-ci - Google Patents

Film de pré-enduction et procédé de préparation de celui-ci Download PDF

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Publication number
WO2014000631A1
WO2014000631A1 PCT/CN2013/077905 CN2013077905W WO2014000631A1 WO 2014000631 A1 WO2014000631 A1 WO 2014000631A1 CN 2013077905 W CN2013077905 W CN 2013077905W WO 2014000631 A1 WO2014000631 A1 WO 2014000631A1
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WO
WIPO (PCT)
Prior art keywords
layer
melt adhesive
hot melt
agent
substrate layer
Prior art date
Application number
PCT/CN2013/077905
Other languages
English (en)
Chinese (zh)
Inventor
钟玉
Original Assignee
北京康得新复合材料股份有限公司
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Filing date
Publication date
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Publication of WO2014000631A1 publication Critical patent/WO2014000631A1/fr

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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
    • 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
    • B32B27/32—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
    • B32B27/34—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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • 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
    • B32B2405/00—Adhesive articles, e.g. adhesive tapes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/414—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of a copolymer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/04—Presence of homo or copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/10—Presence of homo or copolymers of propene
    • C09J2423/106—Presence of homo or copolymers of propene in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2431/00—Presence of polyvinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00—Presence of polyester
    • C09J2467/006—Presence of polyester in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2477/00—Presence of polyamide
    • C09J2477/006—Presence of polyamide in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2479/00—Presence of polyamine or polyimide
    • C09J2479/02—Presence of polyamine or polyimide polyamine
    • C09J2479/026—Presence of polyamine or polyimide polyamine in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2493/00—Presence of natural resin

Definitions

  • the present invention relates to the field of printing film technology, and in particular to a precoat film and a method for preparing the precoat film.
  • Print film is an important means of post-press processing, which determines the final value of the printed product.
  • the film coating process of the printed matter refers to covering the paper printed matter with a plastic film, and using an adhesive in the middle, after heat and pressure treatment, the two different properties of the plastic film and the paper are bonded together to form a paper/plastic combination.
  • a surface decoration processing technology It protects and decorates printed products and is widely used in the field of packaging and printing, such as book covers, brochures, maps, advertising gift bags, and advanced packaging boxes.
  • Pre-coated film can be called environmentally friendly or clean laminating technology, which can protect the environment, protect health and produce safely, so it is more and more popular in the market.
  • the current domestic pre-coated film products are ordinary EVA pre-coated films.
  • ordinary pre-coated films can meet the requirements.
  • ordinary pre-coated films will exhibit quality problems such as blistering and delamination, which will seriously affect the yield and work of the film. effectiveness.
  • the present invention is directed to solving at least some of the above technical problems or at least providing a useful commercial choice. To this end, it is an object of the present invention to provide a precoated film which has a soft touch and which has good adhesion to a print.
  • Another object of the present invention is to provide a process for preparing the above precoated film.
  • a precoat film comprising: a substrate layer, the substrate layer comprising: a substrate layer, the substrate layer being a biaxially stretched polyester layer, a biaxially stretched nylon a layer or biaxially oriented polypropylene layer; and a flexible coating disposed on the first side of the substrate layer and formed of a mixture of a polyurethane dispersion and a curing agent, polyurethane in the mixture a weight percentage of 15% to 30% and a weight percentage of the curing agent of 50% or less, an intermediate layer, the intermediate layer being disposed on the second surface of the substrate layer and formed of an aqueous solution of polyethyleneimine, Polyethylene The solid content of the imine is 0.4%-2.
  • the dry weight of the coating is 0. 007_0. 03 ⁇ 1 112 ; a hot melt adhesive layer, the hot melt adhesive layer is disposed on the intermediate layer and Forming EVA, EEA, EAA or EMA; and an adhesion-promoting layer disposed on the molten rubber layer and formed of a modified acrylic emulsion or a mixture of a modified polyurethane acid emulsion and an auxiliary agent, wherein the modification 1%_10% ⁇
  • the weight of the adhesion promoter is 0.1% _10%.
  • the weight percentage of the adhesion promoter is 0.1% _10%.
  • the surface of the precoat film according to the embodiment of the present invention has a soft touch and the surface scratches can be gradually self-healing, and can resist slight abrasion or scratching.
  • the adhesion-promoting layer as a surface of the pre-coating film and the printed matter of the embodiment of the present invention can not only enhance the adhesion between the pre-coating film and the printed matter, but also meet the requirements of the subsequent processing steps, and expand the pre-coating film. The scope of use.
  • precoat film according to the above embodiment of the present invention may further have the following additional technical features:
  • the hot melt adhesive layer is formed of EVA
  • the VA weight percentage in the hot melt adhesive layer is 10% to 30% and the melt index is 10 to 25 g/10 min.
  • the adhesion promoter is a terpene phenol resin, a silane coupling agent or an ethylene-acrylic acid emulsion.
  • the first leveling agent is 0. 01% by weight of the first leveling agent.
  • the first leveling agent is 0. 01. %-1%.
  • the adjuvant further comprises an antifoaming agent.
  • the thickness of the substrate layer is 8-50 ⁇
  • the thickness of the flexible coating layer is 2-10 ⁇
  • the thickness of the hot melt adhesive layer is 8-30 ⁇ . 5 ⁇
  • the thickness of the adhesive layer is 0. 1-0. 5 ⁇ m.
  • the polyurethane dispersion contains a second leveling agent, a film former, a thickener and a diluent.
  • the second leveling agent is a silicone leveling agent
  • the film forming agent is a glycol ether, a glycol ether ester or an ester alcohol film forming agent.
  • Thickeners include acrylate and/or methacrylate copolymers, including deionized water.
  • the polyethyleneimine has the formula (CH2CH2NH) n, wherein n is in a range such that the average molecular weight is between 1000 and 10,000.
  • the curing agent is an aziridine or isocyanate curing agent.
  • a substrate layer which is a biaxially stretched polyester layer, a biaxially stretched nylon layer or a biaxially oriented polypropylene layer; 2) a flexible coating comprising a mixture of a polyurethane dispersion and a curing agent Laying on the first side of the substrate layer to form a flexible layer, the substrate layer and the flexible layer forming a substrate layer;
  • the precoat film preparation method according to the embodiment of the present invention is not only simple in operation, but also effectively reduces the cost of precoat film preparation because the existing precoat film production line is fully utilized.
  • the precoat film prepared by the precoat film preparation method according to the embodiment of the present invention not only has a soft touch, but also can enhance the adhesion between the precoat film and the printed matter, and satisfies the requirements of the subsequent processing steps.
  • the method for preparing a precoat film according to the above embodiment of the present invention may further have the following additional technical features:
  • the theme layer is a biaxially oriented polypropylene layer, and the step 3) The method includes: 3-1) performing corona treatment on the second surface of the substrate layer, so that the surface value of the second surface of the substrate layer reaches 36 or more;
  • a polyethyleneimine aqueous solution is coated on the second side of the corona-treated substrate layer and dried, and the drying temperature is 85-95 °C.
  • the step 5) comprises:
  • a mixture of a modified acrylic emulsion or a modified urethane emulsion and an auxiliary agent is coated on the surface of the corona-treated hot-melt adhesive layer and dried, and the drying temperature is 70-95 °C.
  • the modified acrylic emulsion or the mixture of the modified urethane emulsion and the auxiliary agent is subjected to a high-speed dispersion treatment before coating.
  • the time of the high speed dispersion treatment is 10-20 minutes.
  • FIG. 1 is a schematic structural view of a precoat film according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a substrate layer of a precoat film according to an embodiment of the present invention
  • FIG. 3 is a flow chart of a method of preparing a precoat film according to an embodiment of the present invention.
  • FIG. 4 is a flow chart showing the fifth step in the method of preparing a precoat film according to an embodiment of the present invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Or implicitly indicate the number of technical features indicated. Thus, features defining “first” and “second” may include one or more of the features, either explicitly or implicitly. In the description of the present invention, the meaning of “plurality” is two or more, unless specifically defined otherwise.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise explicitly defined and defined. It is not in direct contact but through additional features between them.
  • the first feature “aboves”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is less than the second feature.
  • a precoat film according to an embodiment of the present invention will be described below with reference to Figs. 1-2.
  • a precoat film according to an embodiment of the present invention comprises a substrate layer 1, an intermediate layer 2, a hot melt adhesive layer 3, and an adhesion promoting layer 4.
  • the substrate layer 1 includes a substrate layer 11 and a flexible coating 12.
  • the substrate layer 11 may be a biaxially stretched polyester (B0PET) layer, a biaxially stretched nylon (B0PA) layer or a biaxially stretched polypropylene (BOPP) layer.
  • the thickness of the substrate layer 11 can be 8_50 ⁇ ⁇ . Wherein, when the substrate layer 11 is B0PET, the thickness of the B0PET is preferably 9-12 ⁇ ; when the substrate layer 11 is B0PA, the thickness of the B0PA is preferably 12-20 ⁇ m; when the substrate layer 11 is B0PP The thickness of B0PP is preferably 12-15 ⁇ m.
  • a flexible coating 12 is disposed on the first side 111 of the substrate layer 11 and is formed from a mixture of a polyurethane dispersion and a curing agent.
  • the weight percentage of the polyurethane in the mixture is 15% to 30% and the weight percentage of the curing agent is 50% or less.
  • the curing agent may be an aziridine or an isocyanate curing agent.
  • the flexible coating 12 has a thickness of 2 to 10 ⁇ m, preferably 2. 5 to 4 ⁇ .
  • the intermediate layer 2 is disposed on the second side 112 of the substrate layer 11 and is formed of an aqueous solution of polyethyleneimine. 009-0. 01 lg/ m 2 . The 00-0. 01 lg / m 2 .
  • the molecular formula of polyethyleneimine is (CH2CH2NH) n, wherein n is in the range of 1000-10000.
  • the hot melt adhesive layer 3 is disposed on the intermediate layer 2 and is composed of ethylene-vinyl acetate copolymer (EVA), ethylene-propylene acetate copolymer (EEA), ethylene-acrylic acid copolymer (EAA) or ethylene-methacrylic acid (EMA). form.
  • EVA ethylene-vinyl acetate copolymer
  • EAA ethylene-propylene acetate copolymer
  • EAA ethylene-acrylic acid copolymer
  • EMA ethylene-methacrylic acid
  • the thickness of the hot melt adhesive layer 3 is 8-30 ⁇ ⁇ , preferably 12-19 ⁇ ⁇ .
  • the adhesion-promoting layer 4 is disposed on the molten rubber layer 3 and is in direct contact with the surface of the printed matter to be coated.
  • the adhesion-promoting layer 4 is formed of a modified acrylic emulsion or a mixture of a modified polyurethane acid emulsion and an auxiliary.
  • the modified acrylic emulsion or the modified polyurethane acid emulsion has a solid content of 50% or less.
  • the 5% by weight of the mixture is preferably 0.1% _10%, preferably 0.5% 5% by weight.
  • the thickness of the adhesion-promoting layer is 0. 1-0. 5 ⁇ ⁇ (coating dry weight is 0. 05-0. 5g / m 2 ), preferably 0. 2_0. 4 ⁇ m (coating dry weight is 0 1-0. 4g/m).
  • the adhesion-promoting layer 4 allows the pre-coated film of the embodiment of the present invention to have better adhesion and can be laminated on the surface of a plurality of textures to be coated, thereby expanding the range of use.
  • the adhesion-promoting layer 4 also has a low surface wetting tension of the pre-coated film of the embodiment of the invention, and is suitable for subsequent processing such as rolling line, unevenness, and automatic high-speed film coating process, and does not cause problems such as bubbles or delamination. .
  • the surface of the precoated film according to the embodiment of the present invention has a soft touch and the slight scratches of the surface can be gradually self-healing, and can resist slight abrasion or scratching.
  • the adhesion-promoting layer 4 as a surface of the pre-coated film and the printed article of the embodiment of the present invention can not only enhance the adhesion between the pre-coated film and the printed matter, but also meet the requirements of the subsequent processing steps, and expand the pre-coating. The range of use of the film.
  • the adhesion promoter is a terpene phenolic resin, a silane coupling agent or an ethylene-acrylic emulsion, preferably an ethylene-acrylic emulsion, wherein the ethylene-acrylic emulsion has a solids content of from 10% to 40%.
  • the adjuvant may also include a first leveling agent and an antifoaming agent.
  • the first leveling agent is a polyurethane emulsion or an acrylic emulsion leveling agent, and the weight percentage of the first leveling agent is 0.01%-1%, and the mixture of the modified acrylic emulsion or the modified urethane acid emulsion and the auxiliary agent is 0.01%-1%, 01%-0. 5% ⁇ Preferably, it is 0. 1%-0. 5%.
  • the antifoaming agent used in the precoat film of the embodiment of the present invention may be a foaming agent which is commonly used in the art.
  • the polyurethane dispersion contains a second leveling agent, a film former, a thickener and a diluent.
  • the second leveling agent may be a silicone leveling agent
  • the film forming agent may be vinyl glycol butyl ether
  • the thickening agent may comprise an acrylate and/or methacrylate copolymer
  • the diluent may be Includes deionized water.
  • step one a biaxially stretched polyester layer or a biaxially stretched nylon layer is provided as the substrate layer 11.
  • Step 2 A flexible coating 12 comprising a mixture of a polyurethane dispersion and a curing agent is coated on the first side 111 of the substrate layer 11 by a coating apparatus to form the substrate 1.
  • Step 3 coating a polyethyleneimine aqueous solution prepared according to the above ratio on the second surface 112 of the substrate layer 11 and drying it with a drying device to cure the polyvinyl chloride imide in the substrate layer 11
  • the second side 112 is formed to form an intermediate layer
  • the intermediate layer 2 can be directly coated on the second surface 112 of the substrate layer 11, and the second surface 112 and the intermediate layer 2 can be ensured after drying. Cohesiveness between. 01 ⁇
  • the drying temperature can be set at 90 ° C, the thickness of the intermediate layer 2 after drying is about 0. 01 ⁇ m.
  • Step 4 The EVA hot melt adhesive layer 3 is hot pressed to the intermediate layer 2 by an extrusion composite device.
  • the substrate 1 carrying the cured intermediate layer 2 is fed to the recombination position through the guide rolls of the extrusion compounding line while the extruder extrudes the hot-melt adhesive layer 3.
  • An ozone generator is arranged at a composite position adjacent to the extrusion compounding line, and ozone generated by the ozone generator is sprayed onto the EVA casting film extruded by the extruder, the concentration of ozone is 40%, the power is 800 W, and the gas flow rate For 3.5 SCXFM, ozone causes some of the polar groups on the cast surface of the resin, and then the substrate 1 is combined with the extrusion of the intermeshing rolls which are cast through the composite position of the extrusion composite line to form a composite film.
  • Step 5 coating the modified acrylic emulsion or the mixture of the modified urethane acid emulsion and the auxiliary agent on the hot melt adhesive layer 3 by a coating device and drying to form the adhesion promoting layer 4. Thereby a preliminary film is obtained.
  • the surface of the hot melt adhesive layer 3 in contact with the adhesion promoting layer 4 is subjected to corona treatment to obtain a certain amount of polar groups.
  • the degree of corona treatment is indicated by the wetting tension (i.e., the dyne value), and the surface of the hot melt adhesive layer 4 in contact with the bonding layer 4 after the corona treatment is between 50 and 54.
  • the modified acrylic emulsion constituting the adhesion-promoting layer 4 or the mixture of the modified urethane acid emulsion and the auxiliary agent is subjected to high-speed dispersion treatment for 10-20 minutes, so that the respective substances in the adhesion-promoting layer 4 can be sufficiently mixed.
  • the adhesion-promoting layer 4 has a uniform adhesive force to ensure the bonding effect between the pre-coated film and the printed matter of the embodiment of the present invention.
  • the dry weight of the coating is 0. 1-0. 4g / m 2 .
  • the precoat film preparation method according to the embodiment of the present invention is not only simple in operation, but also effectively reduces the cost of precoat film preparation because the existing precoat film production line is fully utilized. Further, the precoat film prepared by the precoat film preparation method according to the embodiment of the present invention not only has a soft touch but also enhances the adhesion between the precoat film and the printed matter, and satisfies the requirements of the subsequent processing steps.
  • Embodiment 2 of the present invention differs from Embodiment 1 in order to improve the surface viscosity, it can
  • the second side of the substrate layer 11 is first subjected to a corona treatment to obtain a certain amount of a polar group such as a carbonyl group.
  • the surface of the second surface 112 of the substrate layer 11 after the corona treatment has a dyne value of 36 or more.
  • the second surface 112 of the corona-treated substrate layer 11 is coated with an aqueous solution of polyethyleneimine and dried, and the drying temperature is 85-95 °C.

Abstract

L'invention concerne un film de pré-enduction et un procédé de préparation de celui-ci. Le film de pré-enduction comprend une couche de substrat (1) qui comprend une couche de base (11) et une couche de revêtement souple (12), une couche intermédiaire (2) qui est placée sur la seconde surface de la couche de base (11) et formée à partir d'une solution aqueuse de polyéthylène-imine, une couche d'adhésif thermofusible (3) qui est placée sur la surface de la couche intermédiaire (2) et formée à partir d'EVA,d'EEA,d'EAA ou d'EMA, et une couche favorisant l'adhérence (4) qui est placée sur la surface de la couche d'adhésif thermofusible et formée à partir d'une émulsion d'acrylate modifié ou d'un mélange d'une émulsion de polyuréthane modifié et d'agents auxiliaires.
PCT/CN2013/077905 2012-06-26 2013-06-25 Film de pré-enduction et procédé de préparation de celui-ci WO2014000631A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210216424.2 2012-06-26
CN2012102164242A CN102732174B (zh) 2012-06-26 2012-06-26 预涂膜及该预涂膜的制备方法

Publications (1)

Publication Number Publication Date
WO2014000631A1 true WO2014000631A1 (fr) 2014-01-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/077905 WO2014000631A1 (fr) 2012-06-26 2013-06-25 Film de pré-enduction et procédé de préparation de celui-ci

Country Status (2)

Country Link
CN (1) CN102732174B (fr)
WO (1) WO2014000631A1 (fr)

Cited By (4)

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CN114221068A (zh) * 2021-12-14 2022-03-22 四川长虹新能源科技股份有限公司 碱性电池壳及其表面处理方法
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CN114736412A (zh) * 2022-04-06 2022-07-12 安徽国风新材料股份有限公司 一种涂布型bopp可压纹预涂膜及其制备方法
CN115820155A (zh) * 2022-12-08 2023-03-21 广东莱尔新材料科技股份有限公司 一种超厚耐高温耐电压的聚酯热熔胶膜及其制备方法

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