WO2019041176A1 - 低温热裱膜及其制备方法和应用 - Google Patents

低温热裱膜及其制备方法和应用 Download PDF

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Publication number
WO2019041176A1
WO2019041176A1 PCT/CN2017/099713 CN2017099713W WO2019041176A1 WO 2019041176 A1 WO2019041176 A1 WO 2019041176A1 CN 2017099713 W CN2017099713 W CN 2017099713W WO 2019041176 A1 WO2019041176 A1 WO 2019041176A1
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Prior art keywords
film
vinyl acetate
ethylene
low
acetate resin
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PCT/CN2017/099713
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English (en)
French (fr)
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胡敏生
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胡敏生
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Priority to PCT/CN2017/099713 priority Critical patent/WO2019041176A1/zh
Publication of WO2019041176A1 publication Critical patent/WO2019041176A1/zh
Priority to US16/432,463 priority patent/US11124681B2/en

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    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0853—Vinylacetate
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • 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
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated
    • 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
    • B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • 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
    • 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
    • B32B2451/00—Decorative or ornamental 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
    • 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
    • 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
    • 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
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/02—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C08K5/134—Phenols containing ester groups
    • C08K5/1345—Carboxylic esters of phenolcarboxylic acids
    • 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
    • C09J2427/00—Presence of halogenated polymer
    • C09J2427/006—Presence of halogenated polymer 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
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive

Definitions

  • the invention relates to the field of printing decoration technology, in particular to a low temperature hot enamel film and a preparation method and application thereof.
  • the hot enamel film refers to a plastic film coated with a hot melt adhesive on the surface, which can be used for film processing of printed matter by hot pressing.
  • the hot enamel film plays a role of protection and beauty.
  • the printed matter after the hot enamel film treatment has a smooth and bright surface and good gloss and color fastness.
  • the hot tantalum film is usually composed of a substrate layer, a tie layer and a hot melt adhesive layer.
  • the tie layer is typically a high molecular weight polyethyleneimine aqueous solution (AC agent) for increasing the bond between the substrate layer and the hot melt adhesive layer.
  • AC agent polyethyleneimine aqueous solution
  • the hot melt adhesive layer generally needs to be heated to 90 ° C - 110 ° C, the cost of the film is high, and a large amount of energy is lost.
  • the substrate and the printed matter are all reduced in overall performance, resulting in abnormal quality and poor film coating effect.
  • an aqueous solution of ethyleneimine (AC agent) generates volatile organic compounds (VOCs) at high temperatures, causing environmental pollution.
  • a low temperature hot enamel film comprising:
  • the glue layer is disposed on the film substrate, and the raw material of the glue layer comprises an ethylene-vinyl acetate resin, a tackifier and an antioxidant, wherein the weight percentage of the ethylene-vinyl acetate resin From 70% to 90%, the tackifier is from 5% to 25% by weight, and the antioxidant is from 3% to 5% by weight.
  • the low temperature hot ruthenium film of the present invention is composed of a film substrate and a glue layer.
  • the present invention is by weight percentage 70%-90% of ethylene-vinyl acetate resin, 5%-25% by weight of tackifier and 3%-5% by weight of antioxidant are combined to improve the performance of the adhesive layer.
  • By controlling the proportion of each component in the adhesive layer it is ensured that the adhesive layer has strong adhesive force, and the adhesive layer has good matching with the film substrate and strong bonding force.
  • the adhesive layer of the low-temperature hot enamel film can be directly combined with the film substrate, and no connection layer is needed, which simplifies the preparation process of the low-temperature hot enamel film, can improve the production efficiency, and avoids the problem that the AC agent in the connection layer pollutes the environment.
  • the use temperature of the adhesive layer can be lowered, and the low temperature hot tanned film can be processed under relatively low temperature conditions. Therefore, the low temperature heat enthalpy film of the present invention can significantly reduce energy consumption and reduce film cost. Moreover, when the film treatment is carried out under a lower temperature condition, the overall performance of the film substrate and the printed matter is relatively stable, and the film coating effect is better.
  • the ethylene-vinyl acetate resin is from 75% to 85% by weight, and the tackifier is from 10% to 20% by weight.
  • the ethylene-vinyl acetate resin is 85% by weight, the tackifier is 12% by weight, and the antioxidant is 3% by weight.
  • the adhesive layer prepared by the preparation of this example has a good adhesion and a low melting temperature.
  • the film substrate is a polyester film, a polypropylene film, or a polyvinyl chloride film.
  • the ethylene-vinyl acetate resin has a vinyl acetate content of 20% by weight to 40% by weight and a melt index of 100g/10min to 400g/10min.
  • the present invention improves the properties of the ethylene-vinyl acetate resin by having a vinyl acetate content of 20% by weight to 40% by weight and a melt index of 100g/10min to 400g/10min.
  • the ethylene-vinyl acetate resin is prepared with a tackifier and an antioxidant to form a rubber layer.
  • the adhesive layer has good matching property with the film substrate, and has strong binding force, and the formed low-temperature hot enamel film has good stability.
  • the melting temperature of the adhesive layer is relatively low, and the film coating treatment can be carried out at a relatively low temperature, and the film coating effect is good.
  • the ethylene-vinyl acetate (EVA) resin of the present invention has a VA content of 20% by weight to 40% by weight. If the VA content is too high, the stability of the ethylene-vinyl acetate (EVA) resin is poor, and the formed rubber layer is prepared. The stability is also poor. If the VA content is too low, it will lead to the interlayer junction between the adhesive layer and the film substrate. The resultant force drops and the melting temperature of the glue layer is higher.
  • the melt index is from 100g/10min to 400g/10min.
  • the viscosity of the flowability of EVA is low, and the fluidity is good, which is favorable for diffusion and penetration on the surface of the film substrate, and the bonding strength of the formed rubber layer and the film substrate is good.
  • the ethylene-vinyl acetate resin has a softening temperature of 40 ° C or less, and the ethylene-vinyl acetate resin has a melting point of 65 ° C or less.
  • the tackifier is a terpene resin, a water white resin, a rosin resin or a hydrogenated petroleum resin, and/or the antioxidant is tetra [ ⁇ -(3,5-di-tert-butyl- 4-hydroxyphenyl)propionic acid] pentaerythritol ester.
  • a method for preparing the above low temperature hot tanned film comprising the following steps:
  • the ethylene-vinyl acetate resin and the thickener are uniformly stirred, and then heated to form a molten state;
  • the glue solution is coated on the surface of the film substrate and solidified to form a glue layer, that is, the low temperature heat ruthenium film is obtained.
  • the adhesive layer of the low-temperature hot enamel film in the present invention is prepared by a coating process.
  • the glue layer of the traditional hot film needs to be prepared by a co-extrusion casting compounding process, and the preparation temperature needs to reach above 200 ° C, and the energy loss is relatively large.
  • the conventional hot laminating film also needs to prepare a connecting layer which is prepared by a wet coating process and needs to be dried, and thus consumes energy. Therefore, the low-temperature hot bismuth film of the invention has simple preparation process, small energy loss, low preparation cost, high preparation efficiency, and is convenient for industrial production.
  • the step of corona treating the surface of the film substrate is further included.
  • a film processing method for coating a surface of a printed product using the above-described low temperature hot enamel film is described.
  • the film processing method is simple, low in cost, and can efficiently coat a printed matter.
  • the film print is prepared by laminating a glue layer of the low temperature hot film to the surface of the printed matter.
  • the adhesive layer of the low-temperature hot enamel film of the present invention can be melted under a relatively low temperature condition, and can be laminated on the surface of the printed matter, that is, a film print can be obtained.
  • the film printed product is simple in preparation, green and environmentally friendly, and the surface thereof is smooth and bright, the gloss and color fastness are remarkably enhanced, and the water, oil and abrasion resistance are better.
  • Fig. 1 is a schematic view showing the structure of a low temperature heat enthalpy film according to an embodiment.
  • the low temperature hot stamping film 10 includes a film substrate 100 and a glue layer 200 , and the glue layer 200 is disposed on the film substrate 100 .
  • the film substrate 100 is a film such as a polyester film, a polypropylene film, a polyvinyl chloride film, a nylon film, or a polyethylene film.
  • the film substrate 100 is a film of a biaxially oriented polyester film, a cast polypropylene film, a calendered polyvinyl chloride film, or the like. The thickness of the film substrate 100 can be adjusted according to actual processing needs.
  • the glue layer 200 is disposed on the film substrate 100.
  • the raw material of the adhesive layer 200 includes an ethylene-vinyl acetate resin, a tackifier, and an antioxidant.
  • the ethylene-vinyl acetate resin has a weight percentage of 70% to 90%, and may be, for example, but not limited to, 70%, 75%, 80%, 85% or 90%.
  • the tackifier may be from 5% to 25% by weight, such as, but not limited to, 5%, 10%, 15%, 20% or 25%.
  • the weight percentage of the antioxidant is 3% to 5%, and may be, for example, but not limited to, 3%, 4% or 5%.
  • the sum of the weight percentages of the components in the raw material of the adhesive layer 200 is 100%.
  • the ethylene-vinyl acetate resin is from 75% to 85% by weight and the tackifier is from 10% to 20% by weight. Further optionally, the ethylene-vinyl acetate resin has a weight percentage of 85%, the tackifier has a weight percentage of 12%, and the antioxidant has a weight percentage of 3%.
  • the adhesive layer 200 prepared by the preparation of this embodiment has a good adhesion and a low melting temperature.
  • the ethylene-vinyl acetate resin has a vinyl acetate content of from 20% by weight to 40% by weight, and may be, for example, but not limited to, 20% by weight, 25% by weight, 30% by weight, 35% by weight, or 40% by weight.
  • the ethylene-vinyl acetate resin has a melt index of from 100 g/10 min to 400 g/10 min, and may be, for example, but not limited to, 100 g/10 min, 200 g/10 min, 300 g/10 min or 400 g/10 min.
  • the present invention improves the properties of the ethylene-vinyl acetate resin by having a vinyl acetate content of 20% by weight to 40% by weight and a melt index of 100g/10min to 400g/10min.
  • the ethylene-vinyl acetate resin is prepared with a tackifier and an antioxidant to form a rubber layer 200.
  • the adhesive layer 200 has good matching with the film substrate 100, and has strong bonding force, and the formed low temperature heat enthalpy film 10 has good stability. . Further, the gel layer 200 has a relatively low melting temperature, and can be subjected to a film coating treatment at a relatively low temperature, and the film coating effect is good.
  • the ethylene-vinyl acetate (EVA) resin in the invention has a VA content of 20% by weight to 40% by weight. If the VA content is too high, the stability of the ethylene-vinyl acetate (EVA) resin is poor, and the formed rubber layer is further prepared. The stability of 200 is also poor. If the VA content is too low, the interlayer bonding force between the adhesive layer 200 and the film substrate 100 is lowered, and the melting temperature of the adhesive layer 200 is high. Its melt index is From 100 g/10 min to 400 g/10 min, the fluidity of the EVA is low in viscosity and good in fluidity, and is favorable for diffusion and penetration on the surface of the film substrate 100, and the adhesion between the formed rubber layer 200 and the film substrate 100 is good.
  • the ethylene-vinyl acetate resin has a softening temperature of 40 ° C or less, and the ethylene-vinyl acetate resin has a melting point of 65 ° C or less.
  • the tackifier is mainly used to further increase the initial tack and tack of the adhesive layer 200.
  • the addition of the tackifier to the EVA resin further enhances the bonding force between the adhesive layer 200 and the film substrate 100.
  • the tackifier is a resin such as a terpene resin, a water white resin, a rosin resin or a hydrogenated petroleum resin, which has excellent compatibility, weather resistance and viscosity increasing effect.
  • the antioxidant is mainly used to improve the stability of the adhesive layer 200.
  • the antioxidant is tetrakis[ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester.
  • the tetrakis[ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester has good oxidation resistance, and the formed rubber layer 200 has good stability.
  • the low temperature heat enthalpy film 10 of the present invention is composed of a film substrate 100 and a glue layer 200.
  • the invention combines 70%-90% by weight of ethylene-vinyl acetate resin, 5%-25% by weight of tackifier and 3%-5% by weight of antioxidant to the glue
  • the performance of layer 200 is improved. By controlling the proportion of each component in the adhesive layer 200, it is ensured that the adhesive layer 200 has a strong adhesive force, and the adhesive layer 200 has good matching with the film substrate 100 and has strong bonding force.
  • the adhesive layer 200 of the low-temperature hot stamping film 10 can be directly combined with the film substrate 100 without the need of providing a connecting layer, which simplifies the preparation process of the low-temperature hot rolling film 10, can improve the production efficiency, and avoids the contamination of the AC agent in the connecting layer. Environmental issues.
  • the use temperature of the adhesive layer 200 can be lowered, and the low temperature hot stamping film 10 can complete the film processing under relatively low temperature conditions. Therefore, the low temperature heat enthalpy film 10 of the present invention can significantly reduce energy consumption and reduce film cost. Moreover, when the film treatment is carried out under a lower temperature condition, the overall performance of the film substrate 100 and the printed matter is relatively stable, and the film coating effect is better.
  • a method for preparing the above-mentioned low temperature heat aging film 10 comprises the following steps:
  • an ethylene-vinyl acetate resin, a tackifier and an antioxidant are respectively taken.
  • the three components may be first subjected to extrusion granulation using a single-screw extruder to obtain a master batch. Specifically, the corresponding object is first weighed according to the weight of the formula, and then the components are thoroughly stirred by means of material agitation, added together to the extruder hopper, and extruded and granulated. The masterbatch is heated and plasticized by a single-screw extruder and extruded into a glue pan to form a molten state glue, which is reserved.
  • the glue solution is coated on the surface of the film substrate 100 and solidified to form a glue layer 200, that is, the low temperature heat aging film 10 is obtained.
  • the formed rubber layer 200 is subjected to corona treatment, and the low temperature hot enamel film 10 is subjected to a winding process.
  • the prepared glue can be applied to the surface of the film substrate 100 by roll coating or blade coating. Specifically, the molten steel melted in the glue pan is heated by the heating steel roller, and then the amount of sizing per unit area is controlled by the gap of the scraper. When the film substrate 100 is heated by the steel roller, the glue can be coated by the scraper. On the surface of the film substrate 100, the film is cured and shaped to form a glue layer 200, that is, a low temperature heat aging film 10 is obtained.
  • the film substrate is corona treated prior to application of the glue to provide a more uniform coating of the film in the film substrate.
  • the glue applied to the base layer of the film is cured and shaped by heating or drying.
  • the low-temperature hot ruthenium film 10 has a simple preparation method, high preparation efficiency, and is convenient for industrial production.
  • the rubber layer 200 of the low-temperature heat-deposited film 10 is melted by heating and pressing using a laminator, and is laminated on the surface of the plurality of prints to complete the film-coating treatment.
  • the heating temperature of the laminating machine does not exceed 90 ° C, and the pressure is not lower than 2 Mpa.
  • the film processing method is simple, low in cost, and can efficiently coat a printed matter.
  • the film print is prepared by coating the adhesive layer 200 of the low temperature heat aging film 10 on the surface of a printed matter (not shown).
  • the rubber layer 200 of the low-temperature heat-deposited film 10 of the present invention is melted under a relatively low temperature condition, and is further capable of being laminated on the surface of the printed matter, that is, a film print is obtained.
  • the film printed product is simple in preparation, green and environmentally friendly, and the surface thereof is smooth and bright, the gloss and color fastness are remarkably enhanced, and the water, oil and abrasion resistance are better.
  • the film print can be a book, a book, a commemorative album, a postcard, a product brochure, a calendar, a map, etc., and is of course not limited to the above printed matter.
  • Example 1 A low temperature hot ruthenium film 1 was prepared.
  • ethylene-vinyl acetate resin 85% of ethylene-vinyl acetate resin, 12% of terpene resin and 3% of tetra-[ ⁇ -(3,5-di-tert-butyl-4-hydroxyl) are used according to the weight percentage of each component in the raw materials.
  • the ethylene-vinyl acetate resin had a VA content of 30% by weight and a melt index of 100 g/10 min.
  • the masterbatch is melt-plasticized using a single-screw extruder to form a glue, which is extruded into a glue pan for use.
  • a biaxially oriented polypropylene film substrate is provided, and the surface on which the glue is applied is subjected to corona treatment.
  • the glue is applied to the surface of the biaxially oriented polypropylene film substrate by using a doctor blade, and is naturally dried and solidified to form a rubber layer.
  • the weight percentage of each component in the raw materials 70% of ethylene-vinyl acetate resin, 25% of water white resin and 5% of tetrakis [ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl) were respectively taken. ) propionic acid] pentaerythritol ester.
  • the ethylene-vinyl acetate resin had a VA content of 20% by weight and a melt index of 200 g/10 min.
  • the weight percentage of each component in the raw materials 90% of ethylene-vinyl acetate resin, 5% of rosin resin and 5% of tetrakis[ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl) were respectively taken.
  • Propionate] pentaerythritol ester the ethylene-vinyl acetate resin had a VA content of 30% by weight and a melt index of 400 g/10 min.
  • ethylene-vinyl acetate resin According to the weight percentage of each component in the raw materials, 75% of ethylene-vinyl acetate resin, 20% of terpene resin and 5% of tetrakis [ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl) were taken. ) propionic acid] pentaerythritol ester. Among them, the ethylene-vinyl acetate resin had a VA content of 40% by weight and a melt index of 150 g/10 min.
  • ethylene-vinyl acetate resin According to the weight percentage of each component in the raw materials, 85% of ethylene-vinyl acetate resin, 10% of hydrogenated petroleum resin and 5% of tetrakis [ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl) were respectively taken. ) propionic acid] pentaerythritol ester. Among them, the ethylene-vinyl acetate resin had a VA content of 30% by weight and a melt index of 110 g/10 min.
  • the weight percentage of each component in the raw materials 65% of ethylene-vinyl acetate resin, 30% Terpene resin and 5% tetrakis[ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester.
  • the ethylene-vinyl acetate resin had a VA content of 30% by weight and a melt index of 100 g/10 min.
  • ethylene-vinyl acetate resin 95% of ethylene-vinyl acetate resin, 3% of terpene resin and 2% of tetrakis [ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl) were respectively taken. ) propionic acid] pentaerythritol ester.
  • the ethylene-vinyl acetate resin had a VA content of 30% by weight and a melt index of 100 g/10 min.
  • the low-temperature hot tanned film prepared in Example 1, the hot tanned films 1 and 2 prepared in Comparative Examples 1 and 2, and the commercially available hot tanned film (three-layer structure containing a substrate/joining layer/hot melt adhesive layer) were respectively taken.
  • the laminating treatment can be completed on the printing paper by using a laminator and adjusting the heating temperature and the heating pressure.
  • the film is as follows:
  • the laminator had a heating temperature of 70 ° C and a pressure of 2.5 MPa. After the film processing is completed, the film coating effect of the printing paper is good.
  • the low-temperature hot ruthenium film 1 was subjected to interlayer peeling test using a 3M adhesive tape, and it was confirmed by experiments that the low-temperature hot enamel film 1 did not show peeling of the rubber layer.
  • the heating temperature of the laminator was 85 ° C and the pressure was 3 MPa. After the filming process is completed, the film coating effect of the printing paper is poor.
  • the thermal peeling film 1 was subjected to an interlayer peeling test using a 3M adhesive tape, and it was confirmed by experiments that the hot adhesive film 1 peeled off.
  • the laminator was heated at a temperature of 88 ° C and a pressure of 2.8 MPa. After the filming process is completed, the film coating effect of the printing paper is poor.
  • the interlayer peeling test of the hot tanned film 2 was carried out using a 3M adhesive tape, and it was confirmed by experiments that the peeling phenomenon of the adhesive layer occurred.
  • the laminator was heated at a temperature of 95 ° C and a pressure of 4 MPa. After the filming process is completed, the film coating effect of the printing paper is general.
  • the commercially available hot ruthenium film was subjected to interlayer peeling test using a 3M adhesive tape, and it was confirmed by experiments that the peeling phenomenon of the rubber layer did not occur in the commercially available hot enamel film.
  • the low-temperature hot enamel film prepared in the invention has good matching property with the film substrate, strong bonding force, and can be coated at a lower temperature condition, and the film substrate is coated during the film coating process. And the comprehensive performance of the printed matter has less influence and the film coating effect is better.

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Abstract

一种低温热裱膜（10）及其制备方法和应用；所述的低温热裱膜（10）包括薄膜基材（100）及胶层（200），所述胶层（200）设在所述薄膜基材（100）上，所述胶层（200）的原料包括乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂，其中，所述乙烯-醋酸乙烯酯树脂的重量百分比为70％-90％，所述增粘剂的重量百分比为5％-25％，所述抗氧化剂的重量百分比为3％-5％；所述的低温热裱膜（10）中胶层（200）与薄膜基材（100）的结合力强，且其能够在较低的温度条件下进行覆膜处理，覆膜效果较好。

Description

低温热裱膜及其制备方法和应用 技术领域
本发明涉及印刷装饰技术领域，特别是涉及一种低温热裱膜及其制备方法和应用。
背景技术
热裱膜是指表面涂覆有热熔胶的塑料薄膜，通过热压可以用于印刷品的覆膜加工。热裱膜起到保护、美观的作用，经热裱膜覆膜处理后的印刷品，其表面平滑光亮，具有较好的光泽度和色牢度。
热裱膜通常由基材层、连接层和热熔胶层构成。连接层通常为高分子量聚乙烯亚胺水溶液(AC剂)，用于增加基材层与热熔胶层之间的结合力。但是传统技术的热裱膜进行覆膜时，热熔胶层一般需要加热到90℃-110℃，覆膜成本较高，且会损耗大量的能源。而且温度较高的情况下基材及印刷品均会发生综合性能的降低，产生品质异常，覆膜效果较差。此外，乙烯亚胺水溶液(AC剂)在高温状态下会产生挥发性有机化合物(VOC)，对环境造成污染。
发明内容
基于此，有必要提供一种覆膜温度低、覆膜成本低且节能环保的低温热裱膜及其制备方法和应用。
一种低温热裱膜，包括：
薄膜基材；
胶层，所述胶层设在所述薄膜基材上，所述胶层的原料包括乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂，其中，所述乙烯-醋酸乙烯酯树脂的重量百分比为70％-90％，所述增粘剂的重量百分比为5％-25％，所述抗氧化剂的重量百分比为3％-5％。
本发明的低温热裱膜由薄膜基材及胶层组成。本发明通过重量百分比为 70％-90％的乙烯-醋酸乙烯酯树脂、重量百分比为5％-25％的增粘剂及重量百分比为3％-5％的抗氧化剂的共同配合，以对胶层的性能进行改进。通过控制胶层中各组分的配比比例，确保该胶层有较强的粘结力，该胶层与薄膜基材的匹配性好且结合力强。该低温热裱膜的胶层可以与薄膜基材直接结合，无需设置连接层，简化了低温热裱膜的制备工艺，能够提高生产效率，而且避免了连接层中的AC剂污染环境的问题。
此外，通过控制该胶层中各组分的配比比例，能够降低该胶层的使用温度，进而该低温热裱膜能够在相对较低的温度条件下完成覆膜处理。因此，本发明的低温热裱膜能够显著降低能源消耗，减少覆膜成本。而且在较低的温度条件下进行覆膜处理时，薄膜基材及印刷品的综合性能相对较稳定，覆膜效果较好。
在其中一个实施例中，所述乙烯-醋酸乙烯酯树脂的重量百分比为75％-85％，所述增粘剂的重量百分比为10％-20％。
在其中一个实施例中，所述乙烯-醋酸乙烯酯树脂的重量百分比为85％，所述增粘剂的重量百分比为12％，所述抗氧化剂的重量百分比为3％。该实施例制备形成的胶层的粘结力较好，且熔融温度较低。
在其中一个实施例中，所述薄膜基材为聚酯薄膜、聚丙烯薄膜或聚氯乙烯薄膜。
在其中一个实施例中，所述乙烯-醋酸乙烯酯树脂中醋酸乙烯含量为20wt％-40wt％，熔融指数为100g/10min-400g/10min。本发明通过对乙烯-醋酸乙烯酯树脂的性能进行改进，其醋酸乙烯的含量为20wt％-40wt％、熔融指数为100g/10min-400g/10min。该乙烯-醋酸乙烯酯树脂与增粘剂及抗氧化剂制备形成胶层，该胶层与薄膜基材的匹配性好，结合力强，形成的低温热裱膜的稳定性较好。此外，该胶层的熔融温度相对较低，能够在较低温度下进行覆膜处理，覆膜效果较好。
本发明的乙烯-醋酸乙烯酯(EVA)树脂，其VA含量为20wt％-40wt％，若VA含量过高，乙烯-醋酸乙烯酯(EVA)树脂稳定性较差，进而制备形成的胶层的稳定性也较差，若VA含量过低，会导致胶层与薄膜基材之间的层间结 合力下降，而且胶层的熔融温度较高。其熔融指数为100g/10min-400g/10min，EVA的流动性的粘度低，流动性好，有利于在薄膜基材表面扩散和渗透，形成的胶层与薄膜基材的结合力好。
在其中一个实施例中，所述乙烯-醋酸乙烯酯树脂的软化温度小于等于40℃，所述乙烯-醋酸乙烯酯树脂的熔点小于等于65℃。通过控制乙烯-醋酸乙烯酯树脂的软化温度及熔点，确保制备形成的胶层的使用温度降低到60℃-80℃，能够显著降低能源消耗，减少了VOC气体排放，而且确保覆膜的效果较好。
在其中一个实施例中，所述增粘剂为萜烯树脂、水白树脂、松香树脂或氢化石油树脂，和/或所述抗氧化剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。
此外，还有必要提供一种低温热裱膜的制备方法。
一种上述低温热裱膜的制备方法，包括以下步骤：
按所述胶层的原料配比分别取乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂；
将所述乙烯-醋酸乙烯酯树脂、所述增粘剂所述抗氧化剂搅拌均匀，再通过加热形成熔融状态的胶液；
将所述胶液涂布在所述薄膜基材的表面，固化形成胶层，即得所述低温热裱膜。
本发明中的低温热裱膜的胶层采用涂布工艺制备而成。而传统的热裱膜的胶层需要采用共挤出流延复合的工艺制备而成，其制备温度需要达到200℃以上，能量损耗比较大。并且传统的热裱膜还需要制备连接层，该连接层采用湿式涂布工艺制备且需进行烘干处理，进而也需要消耗能量。因此，本发明的低温热裱膜制备工艺简单，能量损耗小，制备成本低，制备效率高，便于产业化生产。
在其中一个实施例中，还包括对所述薄膜基材的表面进行电晕处理的步骤。
此外，还有必要提供一种覆膜处理方法。
一种覆膜处理方法，使用上述低温热裱膜对印刷品表面进行覆膜处理。
该覆膜处理方法简便，成本低，且能够高效地对印刷品进行覆膜处理。
此外，还有必要提供一种覆膜印刷品。
该覆膜印刷品由上述低温热裱膜的胶层覆合于印刷品的表面制备而成。
本发明中的低温热裱膜的胶层可以在较低的温度条件下熔融，进而能够覆合于印刷品表面，即得覆膜印刷品。该覆膜印刷品的制备简单，绿色环保，其表面平滑光亮，光泽度和色牢度显著增强，且具有较好地耐水、耐油、耐磨等性能。
附图说明
图1为一实施方式的低温热裱膜的结构示意图。
附图标记说明：
10.低温热裱膜；100.薄膜基材；200.胶层。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1所示的实施方式中，该低温热裱膜10包括薄膜基材100及胶层200，该胶层200设在该薄膜基材100上。
该薄膜基材100为聚酯薄膜、聚丙烯薄膜、聚氯乙烯薄膜、尼龙薄膜或聚乙烯薄膜等薄膜。可选地，该薄膜基材100为双向拉伸聚酯薄膜、流延聚丙烯薄膜、压延聚氯乙烯薄膜等薄膜。该薄膜基材100的厚度可根据实际加工需要进行调整。
该胶层200设在该薄膜基材100之上。该胶层200的原料包括乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂。其中，该乙烯-醋酸乙烯酯树脂的重量百分比为70％-90％，例如可以为，但不限于70％、75％、80％、85％或90％。该增粘剂的重量百分比为5％-25％，例如可以为，但不限于5％、10％、15％、20％或25％。以及该抗氧化剂的重量百分比为3％-5％，例如可以为，但不限于3％、4％或5％。该胶层200的原料中各组分重量百分含量之和为100％。
可选地，该乙烯-醋酸乙烯酯树脂的重量百分比为75％-85％以及该增粘剂的重量百分比为10％-20％。进一步可选地，该乙烯-醋酸乙烯酯树脂的重量百分比为85％、该增粘剂的重量百分比为12％以及该抗氧化剂的重量百分比为3％。该实施例制备形成的胶层200的粘结力较好，且熔融温度较低。
在一个实施例中，该乙烯-醋酸乙烯酯树脂中醋酸乙烯含量为20wt％-40wt％，例如可以为，但不限于20wt％、25wt％、30wt％、35wt％或40wt％。该乙烯-醋酸乙烯酯树脂的熔融指数为100g/10min-400g/10min，例如可以为，但不限于100g/10min、200g/10min、300g/10min或400g/10min。本发明通过对乙烯-醋酸乙烯酯树脂的性能进行改进，其醋酸乙烯的含量为20wt％-40wt％、熔融指数为100g/10min-400g/10min。该乙烯-醋酸乙烯酯树脂与增粘剂及抗氧化剂制备形成胶层200，该胶层200与薄膜基材100的匹配性好，结合力强，形成的低温热裱膜10的稳定性较好。此外，该胶层200的熔融温度相对较低，能够在较低温度下进行覆膜处理，覆膜效果较好。
本发明中的乙烯-醋酸乙烯酯(EVA)树脂，其VA含量为20wt％-40wt％，若VA含量过高，乙烯-醋酸乙烯酯(EVA)树脂稳定性较差，进而制备形成的胶层200的稳定性也较差，若VA含量过低，会导致胶层200与薄膜基材100之间的层间结合力下降，而且胶层200的熔融温度较高。其熔融指数为 100g/10min-400g/10min，EVA的流动性的粘度低，流动性好，有利于在薄膜基材100表面扩散和渗透，形成的胶层200与薄膜基材100的结合力好。
在一个实施例中，该乙烯-醋酸乙烯酯树脂的软化温度小于等于40℃，该乙烯-醋酸乙烯酯树脂的熔点小于等于65℃。通过控制乙烯-醋酸乙烯酯树脂的软化温度及熔点，确保制备形成的胶层200的使用温度降低到60℃-80℃，能够显著降低能源消耗，减少了VOC气体排放，而且确保覆膜的效果较好。
该增粘剂主要用于进一步提高胶层200的初粘力和持粘力。该增粘剂加入到EVA树脂中，能够进一步提高胶层200与薄膜基材100的之间的结合力。可选地，该增粘剂为萜烯树脂、水白树脂、松香树脂或氢化石油树脂等树脂，其具有优良的相容性、耐候性及增粘效果。
该抗氧化剂主要用于提高胶层200的稳定性。可选地，该抗氧化剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯的抗氧化性能较好，制备形成的胶层200的稳定性较好。
本发明的低温热裱膜10由薄膜基材100及胶层200组成。本发明通过重量百分比为70％-90％的乙烯-醋酸乙烯酯树脂、重量百分比为5％-25％的增粘剂及重量百分比为3％-5％的抗氧化剂的共同配合，以对胶层200的性能进行改进。通过控制胶层200中各组分的配比比例，确保该胶层200有较强的粘结力，该胶层200与薄膜基材100的匹配性好且结合力强。该低温热裱膜10的胶层200可以与薄膜基材100直接结合，无需设置连接层，简化了低温热裱膜10的制备工艺，能够提高生产效率，而且避免了连接层中的AC剂污染环境的问题。
此外，通过控制该胶层200中各组分的配比比例，能够降低该胶层200的使用温度，进而该低温热裱膜10能够在相对较低的温度条件下完成覆膜处理。因此，本发明的低温热裱膜10能够显著降低能源消耗，减少覆膜成本。而且在较低的温度条件下进行覆膜处理时，薄膜基材100及印刷品的综合性能相对较稳定，覆膜效果较好。
此外，还有必要提供一种低温热裱膜10的制备方法。
一种上述低温热裱膜10的制备方法，包括以下步骤：
1)按该胶层200的原料配比分别取乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂。
2)将该乙烯-醋酸乙烯酯树脂、该增粘剂该抗氧化剂搅拌均匀，再通过加热形成熔融状态的胶液。
可选地，为使原料中各组分混合均匀，可以先使用单螺杆挤出机把三种组分共混挤出造粒，得到母粒。具体地，先按照配方重量称量对应物体，然后用物料搅拌的方式把各组分充分搅拌均匀，一起添加到挤出机料斗，挤出造粒。将母粒通过单螺杆挤出机加热塑化挤出到胶液盘里，形成熔融状态的胶液，备用。
3)将该胶液涂布在该薄膜基材100的表面，固化形成胶层200，即得该低温热裱膜10。可选地，对制备形成的胶层200进行电晕处理，再将低温热裱膜10进行收卷处理。
在一个实施例中，由于EVA的MI值大，流动性好，制备的胶液可以采用辊涂或者刮涂等方式涂布于薄膜基材100的表面。具体地，通过加热钢辊转动带起胶液盘里熔融的胶液，然后通过刮刀的间隙控制单位面积的上胶量，薄膜基材100通过加热钢辊时，通过刮刀可以将胶液涂布于薄膜基材100的表面，固化定型，形成胶层200，即得低温热裱膜10。
在一个实施例中，涂布胶液前先对该薄膜基层进行电晕处理，以使得胶液在薄膜基层涂布得更均匀。可选地，经过加热烘干或者自然晾干，将涂布在该薄膜基层的胶液固化定型。
该低温热裱膜10制备方法简单，制备效率高，便于产业化生产。
此外，还有必要提供一种覆膜处理方法。
一种覆膜处理方法，使用上述低温热裱膜10对印刷品表面进行覆膜处理。
可选地，使用覆膜机加热加压将低温热裱膜10的胶层200熔融，并覆合于数印刷品表面，完成覆膜处理。其中，覆膜机的加热温度不超过90℃，压力不低于2Mpa。
该覆膜处理方法简便，成本低，且能够高效地对印刷品进行覆膜处理。
此外，还有必要提供一种覆膜印刷品。
该覆膜印刷品由上述低温热裱膜10的胶层200覆合于印刷品(图未示)的表面制备而成。
本发明中的低温热裱膜10的胶层200在较低的温度条件下熔融，进而能够覆合于印刷品表面，即得覆膜印刷品。该覆膜印刷品的制备简单，绿色环保，其表面平滑光亮，光泽度和色牢度显著增强，且具有较好地耐水、耐油、耐磨等性能。
该覆膜印刷品可以为书刊、画册、纪念册、明信片、产品说明书、挂历、地图等印刷品，当然也并不局限于上述印刷品。
具体实施例
实施例1 制备低温热裱膜1。
1)按照原料中各组分的重量百分比分别取85％的乙烯-醋酸乙烯酯树脂、12％的萜烯树脂及3％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为30wt％，熔融指数为100g/10min。
2)将乙烯-醋酸乙烯酯树脂、萜烯树脂及四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯放入到容器中，搅拌混合均匀，再通过单螺杆挤出机制成母粒备用。
3)使用单螺杆挤出机将母粒熔融塑化形成胶液，并挤出到胶液盘里，备用。
4)提供双向拉伸聚丙烯薄膜基材，对其进行涂布胶液的表面进行电晕处理。双向拉伸聚丙烯薄膜基材通过加热钢辊时，使用刮刀将胶液涂布于双向拉伸聚丙烯薄膜基材的表面，经过自然晾干固化成型，形成胶层。
5)对胶层进行电晕处理，即得低温热裱膜1。最后将低温热裱膜1进行收卷放置，备用。
实施例2 制备低温热裱膜2
本实施与实施例1的区别在于：
按照原料中各组分的重量百分比分别取70％的乙烯-醋酸乙烯酯树脂、25％的水白树脂及5％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为20wt％，熔融指数为200g/10min。
实施例3 制备低温热裱膜3
本实施与实施例1的区别在于：
按照原料中各组分的重量百分比分别取90％的乙烯-醋酸乙烯酯树脂、5％的松香树脂及5％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为30wt％，熔融指数为400g/10min。
实施例4 制备低温热裱膜4
本实施与实施例1的区别在于：
按照原料中各组分的重量百分比分别取75％的乙烯-醋酸乙烯酯树脂、20％的萜烯树脂及5％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为40wt％，熔融指数为150g/10min。
实施例5 制备低温热裱膜5
本实施与实施例1的区别在于：
按照原料中各组分的重量百分比分别取85％的乙烯-醋酸乙烯酯树脂、10％的氢化石油树脂及5％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为30wt％，熔融指数为110g/10min。
对比例1 制备热裱膜1
本实施与实施例1的区别在于：
按照原料中各组分的重量百分比分别取65％的乙烯-醋酸乙烯酯树脂、30％ 的萜烯树脂及5％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为30wt％，熔融指数为100g/10min。
对比例2 制备热裱膜2
本实施与实施例1的区别在于：
按照原料中各组分的重量百分比分别取95％的乙烯-醋酸乙烯酯树脂、3％的萜烯树脂及2％的四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。其中，乙烯-醋酸乙烯酯树脂的VA含量为30wt％，熔融指数为100g/10min。
效果试验例：
分别取实施例1制备的低温热裱膜1、对比例1和2制备的热裱膜1和2及市售热裱膜(含有基材/连接层/热熔胶层的三层结构)，通过使用覆膜机并调整其加热温度及加热压力，以使能够在印刷纸张上完成覆膜处理。覆膜情况如下：
实施例1中的低温热裱膜1进行覆膜处理时，覆膜机的加热温度为70℃，压力为2.5Mpa。覆膜处理完成后，印刷纸张的覆膜效果较好。此外，使用3M胶黏带对低温热裱膜1进行层间剥离测试，经实验证明，该低温热裱膜1未出现胶层剥离的现象。
对比例1中的热裱膜1进行覆膜处理时，覆膜机的加热温度为85℃，压力为3Mpa。覆膜处理完成后，印刷纸张的覆膜效果较差。此外，使用3M胶黏带对热裱膜1进行层间剥离测试，经实验证明，该热裱膜1出现胶层剥离的现象。
对比例2中的热裱膜2进行覆膜处理时，覆膜机的加热温度为88℃，压力为2.8Mpa。覆膜处理完成后，印刷纸张的覆膜效果较差。此外，使用3M胶黏带对热裱膜2进行层间剥离测试，经实验证明，该热裱膜2出现胶层剥离的现象。
市售热裱膜进行覆膜处理时，覆膜机的加热温度为95℃，压力为4Mpa。 覆膜处理完成后，印刷纸张的覆膜效果一般。此外，使用3M胶黏带对市售热裱膜进行层间剥离测试，经实验证明，该市售热裱膜未出现胶层剥离的现象。
因此，本发明中制备的低温热裱膜中胶层与薄膜基材的匹配性好、结合力强，且其能够在较低的温度条件下进行覆膜处理，覆膜过程中对薄膜基材及印刷品的综合性能影响较小，覆膜效果较好。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种低温热裱膜，其特征在于，包括：
    薄膜基材；
    胶层，所述胶层设在所述薄膜基材上，所述胶层的原料包括乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂，其中，所述乙烯-醋酸乙烯酯树脂的重量百分比为70％-90％，所述增粘剂的重量百分比为5％-25％，所述抗氧化剂的重量百分比为3％-5％。
  2. 根据权利要求1所述的低温热裱膜，其特征在于，所述乙烯-醋酸乙烯酯树脂的重量百分比为75％-85％，所述增粘剂的重量百分比为10％-20％。
  3. 根据权利要求2所述的低温热裱膜，其特征在于，所述乙烯-醋酸乙烯酯树脂的重量百分比为85％，所述增粘剂的重量百分比为12％，所述抗氧化剂的重量百分比为3％。
  4. 根据权利要求1-3任一项所述的低温热裱膜，其特征在于，所述薄膜基材为聚酯薄膜、聚丙烯薄膜或聚氯乙烯薄膜。
  5. 根据权利要求1-3任一项所述的低温热裱膜，其特征在于，所述乙烯-醋酸乙烯酯树脂中醋酸乙烯含量为20wt％-40wt％，熔融指数为100g/10min-400g/10min。
  6. 根据权利要求5所述的低温热裱膜，其特征在于，所述乙烯-醋酸乙烯酯树脂的软化温度小于等于40℃，所述乙烯-醋酸乙烯酯树脂的熔点小于等于65℃。
  7. 根据权利要求1-3任一项所述的低温热裱膜，其特征在于，所述增粘剂为萜烯树脂、水白树脂、松香树脂或氢化石油树脂，和/或所述抗氧化剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。
  8. 一种权利要求1-7任一项所述的低温热裱膜的制备方法，其特征在于，包括以下步骤：
    按所述胶层的原料配比分别取乙烯-醋酸乙烯酯树脂、增粘剂及抗氧化剂；
    将所述乙烯-醋酸乙烯酯树脂、所述增粘剂及所述抗氧化剂混合，搅拌均匀，再通过加热形成熔融状态的胶液；
    将所述胶液涂布于所述薄膜基材的表面，固化形成胶层，即得所述低温热裱膜。
  9. 根据权利要求8所述的低温热裱膜的制备方法，其特征在于，还包括对所述薄膜基材的表面进行电晕处理的步骤。
  10. 一种覆膜印刷品，其特征在于，由权利要求1-7任一项所述的低温热裱膜的胶层覆合于印刷品表面制备而成。
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