WO2022241901A1 - Pet heat-sealing film coating anti-fogging agent, pet anti-fogging easy-release film, preparation method therefor and application thereof - Google Patents

Pet heat-sealing film coating anti-fogging agent, pet anti-fogging easy-release film, preparation method therefor and application thereof Download PDF

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Publication number
WO2022241901A1
WO2022241901A1 PCT/CN2021/101754 CN2021101754W WO2022241901A1 WO 2022241901 A1 WO2022241901 A1 WO 2022241901A1 CN 2021101754 W CN2021101754 W CN 2021101754W WO 2022241901 A1 WO2022241901 A1 WO 2022241901A1
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pet
fog
film
heat
easy
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PCT/CN2021/101754
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French (fr)
Chinese (zh)
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李朝辉
黎坛
王俊峰
王恩飞
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海南赛诺实业有限公司
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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
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/2805—Compounds having only one group containing active hydrogen
    • C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
    • C08G18/348—Hydroxycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
    • C08G18/631—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyesters and/or polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/6505—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6511—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38 compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/6541—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/34
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/052—Forming heat-sealable coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/054—Forming anti-misting or drip-proofing coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • 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

Definitions

  • the invention belongs to the technical field of food box packaging, and in particular relates to a PET heat-sealing film coated with an antifogging agent, a PET antifogging easy-to-remove film, a preparation method and application thereof.
  • PET film is used to heat seal PET transparent boxes.
  • PET light film and PET box are not easy to be heat-sealed and bonded, and after bonding, they need to have hot and cold anti-fog functions, which has caused many technical obstacles to product development and application.
  • the domestic traditional food box packaging sealing for fresh food is achieved by coating or compounding the film surface and then heat sealing with the PET box.
  • this laminating method has the following disadvantages: 1) It is difficult to remove the film. Because the thickness of the laminating film is thicker, generally 20-70 ⁇ m, and the thickness is uneven, it is easy to cause excessive heat sealing during use, which is difficult to unravel, and the thickness of the laminating film Unevenness leads to large fluctuations in heat-sealing strength, and it is easy to tear the cover film; 2) The base material of the laminating film is paper, which is relatively poor in transparency or completely opaque; 3) The same material that does not meet environmental protection requirements, because the general The boxes used to hold fresh fruits are all made of PET. However, the base material used for the coating is paper and the material of the coating is PP and the composite film is PE or CPP, which does not meet the requirements of environmental protection and uniform material recycling.
  • the object of the present invention is to provide a PET heat-sealing film coated anti-fog agent, PET anti-fog easy-release film and its preparation method and application, the PET anti-fog easy-to-release film coated with the anti-fog agent
  • the peeling film has the effect of anti-fog and easy to peel off.
  • the invention provides a PET heat-sealing film coating anti-fogging agent, which comprises the following components in terms of mass fraction:
  • the invention provides a PET anti-fog and easy-to-remove film, including a BOPET single-sided heat-sealing film;
  • the anti-fog layer is prepared by coating the PET heat-sealing film with an anti-fog agent as described in the above technical solution.
  • the heat-sealing layer includes the following raw materials in terms of mass fraction: 25% to 35% of terephthalic acid; 35% to 45% of ethylene glycol; 20% to 25% of isophthalic acid; triethyl phosphate Heat stabilizer 2.5-4.5%; PC-64 phosphorus-titanium chelate catalyst 2.0-3.0%; anti-sticking agent SiO 2 0.5-1.0%.
  • the thickness of the anti-fog layer is 950-1050 nm.
  • the invention provides a method for preparing a PET anti-fog and easy-to-remove film, comprising the following steps:
  • the power of the corona treatment is 5.0-10.0KW.
  • the coating amount is 0.1-1.0 g/m 2
  • the coating speed is 170-500 m/min.
  • the invention provides a packaging box, including a PET packaging box body;
  • the PET anti-fog easy-to-remove film realizes the sealing of the packaging box body
  • the PET anti-fog easy-release film is the PET anti-fog easy-release film described in the above technical solution or the PET anti-fog easy-release film prepared by the preparation method described in the above technical solution.
  • the invention provides an antifogging agent for PET heat-sealing film coating, which comprises the following components in terms of mass fraction: 8-11% of acrylic graft modified polyester polyol; 2-4% of hexamethylene diisocyanate ; Acetone 3 ⁇ 5%; Dimethylolpropionic acid 3 ⁇ 4%; 3-allyloxy-2-hydroxyl-1-propanesulfonic acid sodium salt 1.5 ⁇ 3.5%; Propanol 2.5-3.5%; Ethylene glycol 2.0-3.5%; Initiator 0.1-1.0%; Catalyst 0.2-1.2%; Defoamer 0.3-0.5%; Palm wax anti - sticking agent 1.5-2.5%; Agent 0.5-1.0%; soft water 60-70%.
  • the antifogging agent adopting the above-mentioned components has good antifogging effect, can also have good heat sealing strength with the PET box body, achieves the effect of easy peeling, and meets the requirements of environmental protection.
  • Fig. 1 is a schematic structural view of the PET anti-fog and easy-to-peel film of the present invention.
  • the invention provides a PET heat-sealing film coating anti-fogging agent, which comprises the following components in terms of mass fraction:
  • the initiator in the PET heat-sealing film coating antifogging agent is preferably selected from sodium persulfate initiators;
  • the catalyst is preferably selected from dibutyltin dilaurate catalyst;
  • the defoamer is preferably Selected from polyether defoamers;
  • the PET heat-sealing film coating antifogging agent specifically includes the following components:
  • Acrylic graft modified polyester polyol 8.5%; Hexamethylene diisocyanate 2.5%; Acetone 3.5%; Dimethylol propionic acid 3.3%; 3-allyloxy-2-hydroxy-1-propanesulfonic acid Sodium salt 1.5%; maleic anhydride 2.0%; isopropanol 2.5%; ethylene glycol 2.0%; sodium persulfate initiator 0.5%; dibutyltin dilaurate catalyst 1.1%; polyether defoamer 0.5% ; palm wax anti-sticking agent 1.6%; SiO 2 anti-sticking agent 0.5% and soft water 70%;
  • acrylic graft modified polyester polyol 11% hexamethylene diisocyanate 3.6%; acetone 5%; dimethylolpropionic acid 3.2%; 3-allyloxy-2-hydroxy-1-propane Sodium sulfonate 3.0%; Maleic anhydride 2.0%; Isopropanol 3.2%; Ethylene glycol 3.5%; Sodium persulfate initiator 1.0%; Dibutyltin dilaurate catalyst 1.0%; Polyether defoamer 0.5%; palm wax anti-sticking agent 2.0%; SiO2 anti-sticking agent 1.0% and soft water 60%;
  • acrylic graft modified polyester polyol 10% hexamethylene diisocyanate 2.5%; acetone 4.4%; dimethylol propionic acid 3.5%; 3-allyloxy-2-hydroxy-1-propane Sulfonic acid sodium salt 2.5%; maleic anhydride 2.0%; isopropanol 3.0%; ethylene glycol 3.0%; sodium persulfate initiator 0.5%; dibutyltin dilaurate catalyst 1.0%; polyether defoamer 0.4%; palm wax anti-sticking agent 1.7%; SiO2 anti-sticking agent 0.5% and soft water 65%.
  • cold fogging means that when water vapor encounters cold air, the water vapor is condensed into tiny water droplets, which adhere to the surface, causing the surface to form diffuse reflection, which cannot reflect light normally, and thus makes the surface atomized into an opaque state.
  • the function of the anti-fogging agent is to prevent the surface from fogging.
  • the PET anti-fog easy-to-peel film provided by the present invention is provided with the anti-fog layer coated with the anti-fog agent on the PET heat-sealing film described in the above technical solution, so that the heat-sealing of the PET anti-fog easy-to-peel film and the PET packaging box body
  • the strength is 3.0-6.0N/15mm, which can not only ensure the sealing ability of the PET film, but also ensure the easy opening when opening the cover, achieving the effect of easy cover removal; PET anti-fog easy-release film has high transparency, cold anti-fog, hot anti-fog The effect is good.
  • the invention provides a PET anti-fog and easy-to-remove film, including a PET single-sided heat-sealing film;
  • the anti-fog layer is prepared by coating the PET heat-sealing film with an anti-fog agent as described in the above technical solution.
  • Fig. 1 is a schematic structural diagram of the PET anti-fog easy-to-peel film provided by the present invention, wherein, 1 is a PET single-sided heat-sealable film layer, and 2 is an anti-fog layer.
  • the PET anti-fog and easy-to-remove film provided by the present invention includes a BOPET single-sided heat-sealing film; the BOPET single-sided heat-sealing film is preferably prepared according to the following process:
  • melt extrusion is a three-layer co-extrusion, including an anti-adhesive layer, a core layer and a heat-sealing layer compounded in sequence;
  • Described heat-sealing layer comprises following raw material in mass fraction:
  • Terephthalic acid 25-35%; Ethylene glycol 35-45%; Isophthalic acid 20-25%; Triethyl phosphate heat stabilizer 2.5-4.5%; PC-64 phosphorus-titanium chelate catalyst 2.0- 3.0%; anti-blocking agent SiO 2 0.5-1.0%.
  • the anti-adhesive layer is preferably made of the following raw materials by weight percentage: 42-53% of bright polyester chips, 6-8% of smooth masterbatch, and 41-50% of anti-adhesive masterbatch.
  • the raw material of the core layer is bright polyester chips.
  • the heat-sealing strength is preferably controlled by controlling the thickness of the heat-sealing layer; the thickness of the heat-sealing layer is preferably 4-5 ⁇ m.
  • the anti-fog agent described in the above-mentioned technical solution is coated on the heat-sealing layer composed of the above-mentioned components, so that the film has anti-fog and high-temperature heat-sealing functions at the same time, and solves the problem of the sealing cover of the PET box made by laminating. The problem.
  • the PET anti-fog easy-to-peel film provided by the present invention includes an anti-fog layer compounded on the heat cover of the PET single-sided heat-sealing film; formed later.
  • the thickness of the anti-fog layer is preferably 950-1050 nm.
  • the invention provides a method for preparing a PET anti-fog and easy-to-remove film, comprising the following steps:
  • the method provided by the present invention is simple and cost-effective, and the antifogging agent can be directly coated on the heat cover of the BOPET single-sided heat-sealing film; Fogs have good cold and hot anti-fog effects, and are more cost-effective.
  • the BOPET single-sided heat-sealed film roll is preferably unfolded under a tension of 50-120N.
  • the film roll runs forward continuously through a plurality of guide rollers, and uses two identical stations to work alternately, using automatic splicing and fast Change the film to achieve the purpose of continuous unwinding and changing;
  • the film passes through the middle of the corona roller, and corona treatment is performed on the hot cover of the PET single-sided heat-sealing film; the power of the corona treatment is 5.0-10.0KW; after the corona treatment, many uniform Dense holes and the formation of hydroxyl, carboxyl and other ionic bonds greatly improve the adhesion of subsequent coatings.
  • the anti-fogging agent described in the above technical solution is preferably coated on the heat cover of the BOPET single-sided heat-sealing film by means of a reverse roller kissing method of the coating roller; the coating amount of the anti-fogging agent is preferably 0.05 to 0.5 g/m 2 , the coating speed is 170-500m/min.
  • Drying is carried out after coating. During the drying process, the film needs to be controlled under a certain tension. The principle of tension is to meet the requirements of straightening and flattening the film. The tension should be controlled between 40 and 120N. Drying is carried out in an oven; segmented drying is adopted, and the temperature and time of each segment are different. It is preferably divided into 3 to 5 segments, and the temperature is generally set in a decreasing manner; that is, the front segment is generally 110 ⁇ 120 ° C, and the rear segment is generally 100 ° C. ⁇ 110°C, the total drying time of the surface coating: 10 ⁇ 25 seconds. Infrared heating is also provided in the first section, the infrared temperature is 110-130° C., and the time is 2.0-5.0 seconds.
  • the present invention adopts the online detection process and the working principle of online image scanning of the camera.
  • the light source is used to irradiate the surface of the product, and at the same time, the camera scans in real time and collects the product image at the place irradiated by the light source, and processes and divides the collected image.
  • the camera is a CCD industrial camera
  • the light source is a high-brightness LED linear spot light source, which is used to determine product quality and drying conditions.
  • the present invention rewinds the film, and it is necessary to control the tension of the rewinding and the pressure of the pressure roller during the rewinding.
  • the tension and pressure on it also change from large to small. Attenuation rate, the process needs to be finely set according to the substrate film, coating amount, film width, film thickness, etc.
  • the winding tension is 50-110N, and the pressure of the roller is 3.0 ⁇ 2kg.
  • the coil is preferably cured at room temperature for 45-50 hours in a natural environment after winding, so that the single-sided heat-sealing film and the coating layer are further cross-linked, the adhesion of the coating is improved, and the stress of the film roll is released.
  • the invention provides a packaging box, including a PET packaging box body;
  • the PET anti-fog easy-to-remove film realizes the sealing of the packaging box body
  • the PET anti-fog easy-release film is the PET anti-fog easy-release film described in the above technical solution or the PET anti-fog easy-release film prepared by the preparation method described in the above technical solution.
  • the main body material of the packaging box provided by the present invention is PET, and the base material of the packaging film is also PET, which meets the requirements of environmental protection and the recycling of the same material.
  • the above packaging box adopts the PET anti-fog and easy-to-remove film of the present invention, so that its cold anti-fog effect can achieve no water mist or condensation on the film surface, which solves the problem of cold and hot when the packaged raw vegetables and fresh products are put into the freezer for refrigeration.
  • the rapid temperature causes the packaging box to fog up.
  • PET heat-sealing film coated anti-fogging agent provided by the present invention
  • PET anti-fog easy-to-release film and its preparation method and application are described in detail below in conjunction with the examples, but they should not be understood as an explanation of the present invention. Limitation of the protection scope of the invention.
  • BOPET heat-sealing film is formed by three-layer melt co-extrusion, and the three-layer material is divided into upper surface layer, core layer and heat-sealing layer;
  • the upper surface layer is also called anti-adhesive layer, which is made of the following raw materials by weight percentage: 42% of bright polyester chips, 8% of smooth masterbatch, and 50% of anti-adhesive masterbatch;
  • the raw material of the core layer is bright polyester chips
  • the anti-fogging agent is coated on the heat cover of the BOPET single-sided heat-sealing film by reverse roller kissing, the coating amount is 0.3g/m 2 , and the coating speed is 200m/min; drying and curing; The pressure is 60N, and the pressure of the pressing roller is wound at 3Kg; finally, it is cured at room temperature in a natural environment for 2 days to obtain a PET anti-fog easy-to-release film, and the thickness of the anti-fog layer on the PET anti-fog easy-to-release film is 0.3 ⁇ m.
  • the present invention heat-seals the PET anti-fog easy-to-release film and the PET box body under the heat-sealing condition of 150°C*0.14MPa*1S, and the heat-sealing strength is 4.0N/15mm.
  • the present invention adopts haze meter and gloss meter to test the haze and the glossiness of the PET anti-fog easy-release film prepared in Example 1; the haze of the PET anti-fog easy-release film prepared in Example 1 is 2.5%, and the gloss is 98.9GU.
  • the present invention adopts haze meter and gloss meter to test the haze and the glossiness of the PET anti-fog easy-release film prepared in Example 2; the haze of the PET anti-fog easy-release film prepared in Example 2 is 1.25%, and the gloss is 98.9GU.
  • Acrylic graft modified polyester polyol 10% hexamethylene diisocyanate 2.5%; acetone 4.4%; dimethylol propionic acid 3.5%; Sodium acid salt 2.5%; Maleic anhydride 2.0%; Isopropanol 3.0%; Ethylene glycol 3.0%; Sodium persulfate initiator 0.5%; Dibutyltin dilaurate catalyst 1.0%; %; palm wax anti-adhesive agent 1.7%; SiO 2 anti-adhesive agent 0.5% and soft water 65% mixed to obtain anti-fogging agent.
  • the present invention uses a haze meter and a gloss meter to test the haze and gloss of the PET anti-fog and easy-to-remove film prepared in Example 3; the haze and gloss of the PET anti-fog and easy-to-remove film prepared in Example 3 are 1.25%, and the gloss is 98.9% GU.
  • the present invention provides a PET heat-sealing film coating antifogging agent, which comprises the following components in terms of mass fraction: 8-11% of acrylic acid graft modified polyester polyol; hexamethylene Diisocyanate 2 ⁇ 4%; Acetone 3 ⁇ 5%; Dimethylol propionic acid 3 ⁇ 4%; 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt 1.5 ⁇ 3.5%; Maleic anhydride 1.1 ⁇ 2.2%; Isopropanol 2.5 ⁇ 3.5%; Ethylene glycol 2.0 ⁇ 3.5%; Initiator 0.1 ⁇ 1.0%; Catalyst 0.2 ⁇ 1.2%; Defoamer 0.3 ⁇ 0.5%; %; SiO 2 anti-sticking agent 0.5 ⁇ 1.0%; soft water 60 ⁇ 70%.
  • the antifogging agent adopting the above-mentioned components has good antifogging effect, can also have good heat sealing strength with the PET box body, achieves the effect of easy peeling, and meets the requirements

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Abstract

Provided are a PET heat-sealing film coating anti-fogging agent, a PET anti-fogging easy-release film, a preparation method therefor and an application thereof. According to mass fraction, the anti-fogging agent comprises 8-11% of acrylic graft modified polyester polyol; 2-4% of hexamethylene diisocyanate; 3-5% of acetone; 3-4% of dimethylolpropionic acid; 3-4% of dimethylolpropionic acid; 1.5-3.5% of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate; 1.1-2.2% of maleic anhydride; 2.5-3.5% of isopropanol; 2.0-3.5% of ethylene glycol; 0.1-1.0% of an initiator; 0.2-1.2% of a catalyst; 0.3-0.5% of a defoaming agent; 1.5-2.5% of a palm wax release agent; 0.5-1.0% of a SiO2 release agent; and 60-70% of soft water. The anti-fogging agent that uses the above-mentioned components has a good anti-fogging effect, and can also have good heat-sealing strength with a PET box body, so as to achieve the effect of easy cover-opening; in addition, the anti-fogging agent meets environmental requirements.

Description

一种PET热封膜涂布防雾剂、PET防雾易揭膜及其制备方法和应用A kind of PET heat-sealing film coated with anti-fog agent, PET anti-fog easy-release film and its preparation method and application
本申请要求于2021年05月21日提交中国专利局、申请号为202110557582.3、发明名称为“一种PET热封膜涂布防雾剂、PET防雾易揭膜及其制备方法和应用”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。This application is required to be submitted to the China Patent Office on May 21, 2021. The application number is 202110557582.3, and the title of the invention is "An anti-fog agent coated on a PET heat-sealing film, a PET anti-fog easy-to-remove film and its preparation method and application". The priority of the Chinese patent application, the entire content of which is incorporated in this application by reference.
技术领域technical field
本发明属于食品盒包装技术领域，尤其涉及一种PET热封膜涂布防雾剂、PET防雾易揭膜及其制备方法和应用。The invention belongs to the technical field of food box packaging, and in particular relates to a PET heat-sealing film coated with an antifogging agent, a PET antifogging easy-to-remove film, a preparation method and application thereof.
背景技术Background technique
目前市面上生鲜食品包装中应用到的高品质的包装盒，要求具有高透明、易揭盖、冷热防雾功能等的要求，因此，用到了PET薄膜热封在PET透明盒子上。但是由于PET光膜与PET盒子不易热封粘接，且粘接后还需要具备冷热防雾功能，这就给产品开发应用造成了很多技术障碍。At present, the high-quality packaging boxes used in fresh food packaging on the market require high transparency, easy-to-open lid, cold and hot anti-fog functions, etc. Therefore, PET film is used to heat seal PET transparent boxes. However, since PET light film and PET box are not easy to be heat-sealed and bonded, and after bonding, they need to have hot and cold anti-fog functions, which has caused many technical obstacles to product development and application.
国内传统用于生鲜的食品盒包装封口是通过在薄膜表面上淋膜或者复合的方式再与PET盒子热封来实现封口的。但是该淋膜方式存在以下缺点：1)揭膜困难，由于淋膜厚度较厚，一般在20～70μm，且厚度不均，容易导致使用时热封过大，不好揭开，淋膜厚度不均导致热封强度波动大，容易把盖膜撕破；2)淋膜的基材是纸质较为多见，透明度较差或者完全不透明；3)不符合环保要求的同一材质要求，因为一般用于盛装生鲜水果的盒子都是采用PET材质。但是用于淋膜基材是纸质及淋膜的材料是PP及复合的薄膜是PE或CPP，不符合环保统一材质回收利用的要求。The domestic traditional food box packaging sealing for fresh food is achieved by coating or compounding the film surface and then heat sealing with the PET box. However, this laminating method has the following disadvantages: 1) It is difficult to remove the film. Because the thickness of the laminating film is thicker, generally 20-70 μm, and the thickness is uneven, it is easy to cause excessive heat sealing during use, which is difficult to unravel, and the thickness of the laminating film Unevenness leads to large fluctuations in heat-sealing strength, and it is easy to tear the cover film; 2) The base material of the laminating film is paper, which is relatively poor in transparency or completely opaque; 3) The same material that does not meet environmental protection requirements, because the general The boxes used to hold fresh fruits are all made of PET. However, the base material used for the coating is paper and the material of the coating is PP and the composite film is PE or CPP, which does not meet the requirements of environmental protection and uniform material recycling.
因此，市场迫切开发一种能应用于生鲜包装盒包装的易揭防雾PET盖膜，满足现有的市场需求。Therefore, the market is eager to develop an easy-to-remove anti-fog PET cover film that can be applied to fresh food packaging boxes to meet the existing market demand.
发明内容Contents of the invention
有鉴于此，本发明的目的在于提供一种PET热封膜涂布防雾剂、PET防 雾易揭膜及其制备方法和应用，该涂布防雾剂涂布制得的PET防雾易揭膜具有防雾易揭的效果。In view of this, the object of the present invention is to provide a PET heat-sealing film coated anti-fog agent, PET anti-fog easy-release film and its preparation method and application, the PET anti-fog easy-to-release film coated with the anti-fog agent The peeling film has the effect of anti-fog and easy to peel off.
本发明提供了一种PET热封膜涂布防雾剂，以质量分数计，包括以下组分：The invention provides a PET heat-sealing film coating anti-fogging agent, which comprises the following components in terms of mass fraction:
丙烯酸接枝改性聚酯多元醇8～11％；六亚甲基二异氰酸酯2～4％；丙酮3～5％；二羟甲基丙酸3～4％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5～3.5％；马来酸酐1.1～2.2％；异丙醇2.5～3.5％；乙二醇2.0～3.5％；引发剂0.1～1.0％；催化剂0.2～1.2％；消泡剂0.3～0.5％；棕榈蜡防粘剂1.5～2.5％；SiO 2防粘剂0.5～1.0％；软水60～70％。 Acrylic graft modified polyester polyol 8-11%; hexamethylene diisocyanate 2-4%; acetone 3-5%; dimethylol propionic acid 3-4%; 3-allyloxy-2 -Hydroxy-1-propanesulfonic acid sodium salt 1.5-3.5%; maleic anhydride 1.1-2.2%; isopropanol 2.5-3.5%; ethylene glycol 2.0-3.5%; initiator 0.1-1.0%; catalyst 0.2-1.2 %; defoamer 0.3-0.5%; palm wax anti-sticking agent 1.5-2.5%; SiO 2 anti-sticking agent 0.5-1.0%; soft water 60-70%.
本发明提供了一种PET防雾易揭膜，包括BOPET单面热封膜；The invention provides a PET anti-fog and easy-to-remove film, including a BOPET single-sided heat-sealing film;
和复合在所述BOPET单面热封膜的热封面上的防雾层；And the anti-fog layer compounded on the heat cover of the BOPET single-sided heat-sealing film;
所述防雾层由上述技术方案所述PET热封膜涂布防雾剂涂布制得。The anti-fog layer is prepared by coating the PET heat-sealing film with an anti-fog agent as described in the above technical solution.
在本发明中，所述热封层以质量分数计，包括以下原料：对苯二甲酸25～35％；乙二醇35～45％；间苯二甲酸20～25％；三乙基磷酸酯热稳定剂2.5～4.5％；PC-64磷钛螯合物催化剂2.0～3.0％；防粘剂SiO 2 0.5～1.0％。 In the present invention, the heat-sealing layer includes the following raw materials in terms of mass fraction: 25% to 35% of terephthalic acid; 35% to 45% of ethylene glycol; 20% to 25% of isophthalic acid; triethyl phosphate Heat stabilizer 2.5-4.5%; PC-64 phosphorus-titanium chelate catalyst 2.0-3.0%; anti-sticking agent SiO 2 0.5-1.0%.
优选地，所述防雾层的厚度为950～1050nm。Preferably, the thickness of the anti-fog layer is 950-1050 nm.
本发明提供了一种PET防雾易揭膜的制备方法，包括以下步骤：The invention provides a method for preparing a PET anti-fog and easy-to-remove film, comprising the following steps:
将BOPET单面热封膜放卷，对其热封面电晕处理，然后涂布上述技术方案所述的PET热封膜涂布防雾剂，烘干，检测和收卷，得到PET防雾易揭膜。Unwind the BOPET single-sided heat-sealable film, corona-treat the heat-sealed surface, then apply the PET heat-sealable film described in the above technical solution, apply anti-fogging agent, dry, detect and rewind to obtain PET anti-fog easy Peel off the film.
在本发明中，所述电晕处理的功率为5.0～10.0KW。In the present invention, the power of the corona treatment is 5.0-10.0KW.
在本发明中，涂布量为0.1～1.0g/m 2，涂布的速度为170～500m/min。 In the present invention, the coating amount is 0.1-1.0 g/m 2 , and the coating speed is 170-500 m/min.
本发明提供了一种包装盒，包括PET包装盒本体；The invention provides a packaging box, including a PET packaging box body;
和设置在所述包装盒本体上的PET防雾易揭膜，所述PET防雾易揭膜实现包装盒本体的封口；and the PET anti-fog easy-to-remove film arranged on the packaging box body, the PET anti-fog easy-to-remove film realizes the sealing of the packaging box body;
所述PET防雾易揭膜为上述技术方案所述的PET防雾易揭膜或上述技术方案所述制备方法制备的PET防雾易揭膜。The PET anti-fog easy-release film is the PET anti-fog easy-release film described in the above technical solution or the PET anti-fog easy-release film prepared by the preparation method described in the above technical solution.
本发明提供了一种PET热封膜涂布防雾剂，以质量分数计，包括以下组分：丙烯酸接枝改性聚酯多元醇8～11％；六亚甲基二异氰酸酯2～4％；丙酮3～5％；二羟甲基丙酸3～4％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5～3.5％；马来酸酐1.1～2.2％；异丙醇2.5～3.5％；乙二醇2.0～3.5％；引发剂0.1～1.0％； 催化剂0.2～1.2％；消泡剂0.3～0.5％；棕榈蜡防粘剂1.5～2.5％；SiO 2防粘剂0.5～1.0％；软水60～70％。本发明采用上述组分的防雾剂具有良好的防雾效果，还能与PET盒本体具有良好的热封强度，达到易揭盖效果；符合环保要求。 The invention provides an antifogging agent for PET heat-sealing film coating, which comprises the following components in terms of mass fraction: 8-11% of acrylic graft modified polyester polyol; 2-4% of hexamethylene diisocyanate ; Acetone 3~5%; Dimethylolpropionic acid 3~4%; 3-allyloxy-2-hydroxyl-1-propanesulfonic acid sodium salt 1.5~3.5%; Propanol 2.5-3.5%; Ethylene glycol 2.0-3.5%; Initiator 0.1-1.0%; Catalyst 0.2-1.2%; Defoamer 0.3-0.5%; Palm wax anti - sticking agent 1.5-2.5%; Agent 0.5-1.0%; soft water 60-70%. The antifogging agent adopting the above-mentioned components has good antifogging effect, can also have good heat sealing strength with the PET box body, achieves the effect of easy peeling, and meets the requirements of environmental protection.
附图说明Description of drawings
图1为本发明中PET防雾易揭膜的结构示意图。Fig. 1 is a schematic structural view of the PET anti-fog and easy-to-peel film of the present invention.
具体实施方式Detailed ways
本发明提供了一种PET热封膜涂布防雾剂，以质量分数计，包括以下组分：The invention provides a PET heat-sealing film coating anti-fogging agent, which comprises the following components in terms of mass fraction:
丙烯酸接枝改性聚酯多元醇8～11％；六亚甲基二异氰酸酯2～4％；丙酮3～5％；二羟甲基丙酸3～4％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5～3.5％；马来酸酐1.1～2.2％；异丙醇2.5～3.5％；乙二醇2.0～3.5％；引发剂0.1～1.0％；催化剂0.2～1.2％；消泡剂0.3～0.5％；棕榈蜡防粘剂1.5～2.5％；SiO 2防粘剂0.5～1.0％；软水60～70％。 Acrylic graft modified polyester polyol 8-11%; hexamethylene diisocyanate 2-4%; acetone 3-5%; dimethylol propionic acid 3-4%; 3-allyloxy-2 -Hydroxy-1-propanesulfonic acid sodium salt 1.5-3.5%; maleic anhydride 1.1-2.2%; isopropanol 2.5-3.5%; ethylene glycol 2.0-3.5%; initiator 0.1-1.0%; catalyst 0.2-1.2 %; defoamer 0.3-0.5%; palm wax anti-sticking agent 1.5-2.5%; SiO 2 anti-sticking agent 0.5-1.0%; soft water 60-70%.
在本发明中，所述PET热封膜涂布防雾剂中的引发剂优选选自过硫酸钠类引发剂；所述催化剂优选选自二丁基锡二月桂酸酯催化剂；所述消泡剂优选选自聚醚类消泡剂；In the present invention, the initiator in the PET heat-sealing film coating antifogging agent is preferably selected from sodium persulfate initiators; the catalyst is preferably selected from dibutyltin dilaurate catalyst; the defoamer is preferably Selected from polyether defoamers;
在本发明具体实施例中，所述PET热封膜涂布防雾剂具体包括以下组分：In a specific embodiment of the present invention, the PET heat-sealing film coating antifogging agent specifically includes the following components:
丙烯酸接枝改性聚酯多元醇8.5％；六亚甲基二异氰酸酯2.5％；丙酮3.5％；二羟甲基丙酸3.3％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5％；马来酸酐2.0％；异丙醇2.5％；乙二醇2.0％；过硫酸钠类引发剂0.5％；二丁基锡二月桂酸酯催化剂1.1％；聚醚类消泡剂0.5％；棕榈蜡防粘剂1.6％；SiO 2防粘剂0.5％和软水70％； Acrylic graft modified polyester polyol 8.5%; Hexamethylene diisocyanate 2.5%; Acetone 3.5%; Dimethylol propionic acid 3.3%; 3-allyloxy-2-hydroxy-1-propanesulfonic acid Sodium salt 1.5%; maleic anhydride 2.0%; isopropanol 2.5%; ethylene glycol 2.0%; sodium persulfate initiator 0.5%; dibutyltin dilaurate catalyst 1.1%; polyether defoamer 0.5% ; palm wax anti-sticking agent 1.6%; SiO 2 anti-sticking agent 0.5% and soft water 70%;
或包括丙烯酸接枝改性聚酯多元醇11％；六亚甲基二异氰酸酯3.6％；丙酮5％；二羟甲基丙酸3.2％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐3.0％；马来酸酐2.0％；异丙醇3.2％；乙二醇3.5％；过硫酸钠类引发剂1.0％；二丁基锡二月桂酸酯催化剂1.0％；聚醚类消泡剂0.5％；棕榈蜡防粘剂2.0％；SiO 2防粘剂1.0％和软水60％； Or include acrylic graft modified polyester polyol 11%; hexamethylene diisocyanate 3.6%; acetone 5%; dimethylolpropionic acid 3.2%; 3-allyloxy-2-hydroxy-1-propane Sodium sulfonate 3.0%; Maleic anhydride 2.0%; Isopropanol 3.2%; Ethylene glycol 3.5%; Sodium persulfate initiator 1.0%; Dibutyltin dilaurate catalyst 1.0%; Polyether defoamer 0.5%; palm wax anti-sticking agent 2.0%; SiO2 anti-sticking agent 1.0% and soft water 60%;
或包括丙烯酸接枝改性聚酯多元醇10％；六亚甲基二异氰酸酯2.5％；丙 酮4.4％；二羟甲基丙酸3.5％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐2.5％；马来酸酐2.0％；异丙醇3.0％；乙二醇3.0％；过硫酸钠类引发剂0.5％；二丁基锡二月桂酸酯催化剂1.0％；聚醚类消泡剂0.4％；棕榈蜡防粘剂1.7％；SiO 2防粘剂0.5％和软水65％。 Or include acrylic graft modified polyester polyol 10%; hexamethylene diisocyanate 2.5%; acetone 4.4%; dimethylol propionic acid 3.5%; 3-allyloxy-2-hydroxy-1-propane Sulfonic acid sodium salt 2.5%; maleic anhydride 2.0%; isopropanol 3.0%; ethylene glycol 3.0%; sodium persulfate initiator 0.5%; dibutyltin dilaurate catalyst 1.0%; polyether defoamer 0.4%; palm wax anti-sticking agent 1.7%; SiO2 anti-sticking agent 0.5% and soft water 65%.
在本发明中，冷起雾是水蒸气遇到冷空气时，水蒸气被凝结成细小水珠，附着在表面上，使表面形成漫反射，无法正常反光，从而使表面雾化成不透明状。防雾剂的作用是阻止表面结雾现象，其原理：防雾剂是一种带有亲水基的表面活性剂，可在涂层表面取向，疏水基向内，亲水基向外，从而使亲水基易湿润表面，凝结细水珠能迅速扩散形成极薄的水膜或大水珠，避免小水珠在光的散射造成雾化现象。In the present invention, cold fogging means that when water vapor encounters cold air, the water vapor is condensed into tiny water droplets, which adhere to the surface, causing the surface to form diffuse reflection, which cannot reflect light normally, and thus makes the surface atomized into an opaque state. The function of the anti-fogging agent is to prevent the surface from fogging. Make the hydrophilic base easy to wet the surface, and the condensed fine water droplets can quickly diffuse to form a very thin water film or large water droplets, avoiding the atomization caused by the light scattering of small water droplets.
本发明提供的PET防雾易揭膜上设有上述技术方案所述的PET热封膜涂布防雾剂涂布的防雾层，使得PET防雾易揭膜与PET包装盒本体的热封强度在3.0～6.0N/15mm，既能保证PET膜的封口能力，又能保证启盖时轻松打开，达到易揭盖的效果；PET防雾易揭膜透明度高，冷防雾、热防雾效果均较好。The PET anti-fog easy-to-peel film provided by the present invention is provided with the anti-fog layer coated with the anti-fog agent on the PET heat-sealing film described in the above technical solution, so that the heat-sealing of the PET anti-fog easy-to-peel film and the PET packaging box body The strength is 3.0-6.0N/15mm, which can not only ensure the sealing ability of the PET film, but also ensure the easy opening when opening the cover, achieving the effect of easy cover removal; PET anti-fog easy-release film has high transparency, cold anti-fog, hot anti-fog The effect is good.
本发明提供了一种PET防雾易揭膜，包括PET单面热封膜；The invention provides a PET anti-fog and easy-to-remove film, including a PET single-sided heat-sealing film;
和复合在所述PET单面热封膜的热封面上的防雾层；and the anti-fog layer compounded on the heat cover of the PET single-sided heat-sealing film;
所述防雾层由上述技术方案所述PET热封膜涂布防雾剂涂布制得。The anti-fog layer is prepared by coating the PET heat-sealing film with an anti-fog agent as described in the above technical solution.
参见图1，图1为本发明提供的PET防雾易揭膜的结构示意图，其中，1为PET单面热封薄膜层，2为防雾层。Referring to Fig. 1, Fig. 1 is a schematic structural diagram of the PET anti-fog easy-to-peel film provided by the present invention, wherein, 1 is a PET single-sided heat-sealable film layer, and 2 is an anti-fog layer.
本发明提供的PET防雾易揭膜包括BOPET单面热封膜；所述BOPET单面热封膜优选按照以下工艺制得：The PET anti-fog and easy-to-remove film provided by the present invention includes a BOPET single-sided heat-sealing film; the BOPET single-sided heat-sealing film is preferably prepared according to the following process:
配料混合→干燥处理→熔融挤出→流延铸片→纵向拉伸→横向拉伸→牵引收卷→分切。Ingredients mixing→drying treatment→melt extrusion→cast cast sheet→longitudinal stretching→transverse stretching→traction winding→slitting.
上述熔融挤出是三层共挤，包括依次复合的抗粘层、芯层和热封层；The above-mentioned melt extrusion is a three-layer co-extrusion, including an anti-adhesive layer, a core layer and a heat-sealing layer compounded in sequence;
所述热封层以质量分数计，包括以下原料：Described heat-sealing layer comprises following raw material in mass fraction:
对苯二甲酸25～35％；乙二醇35～45％；间苯二甲酸20～25％；三乙基磷酸酯热稳定剂2.5～4.5％；PC-64磷钛螯合物催化剂2.0～3.0％；防粘剂SiO 20.5～1.0％。 Terephthalic acid 25-35%; Ethylene glycol 35-45%; Isophthalic acid 20-25%; Triethyl phosphate heat stabilizer 2.5-4.5%; PC-64 phosphorus-titanium chelate catalyst 2.0- 3.0%; anti-blocking agent SiO 2 0.5-1.0%.
在本发明中，所述抗粘层优选由以下原料按重量百分比制成：大有光聚酯 切片42～53％、爽滑母料6～8％、抗粘母料41～50％。In the present invention, the anti-adhesive layer is preferably made of the following raw materials by weight percentage: 42-53% of bright polyester chips, 6-8% of smooth masterbatch, and 41-50% of anti-adhesive masterbatch.
所述芯层的原料为大有光聚酯切片。The raw material of the core layer is bright polyester chips.
本发明优选通过控制热封层的厚度调控热封强度；所述热封层的厚度优选为4～5μm。本发明通过采用上述组分组成的热封层上涂布上述技术方案所述的防雾剂，使得薄膜同时具有防雾及高温热封作用，解决了淋膜方式做成的PET盒子封口盖出现的问题。In the present invention, the heat-sealing strength is preferably controlled by controlling the thickness of the heat-sealing layer; the thickness of the heat-sealing layer is preferably 4-5 μm. In the present invention, the anti-fog agent described in the above-mentioned technical solution is coated on the heat-sealing layer composed of the above-mentioned components, so that the film has anti-fog and high-temperature heat-sealing functions at the same time, and solves the problem of the sealing cover of the PET box made by laminating. The problem.
本发明提供的PET防雾易揭膜包括复合在所述PET单面热封膜的热封面上的防雾层；所述防雾层由上述技术方案所述防雾剂经涂布烘干固化后形成。所述防雾层的厚度优选为950～1050nm。The PET anti-fog easy-to-peel film provided by the present invention includes an anti-fog layer compounded on the heat cover of the PET single-sided heat-sealing film; formed later. The thickness of the anti-fog layer is preferably 950-1050 nm.
本发明提供了一种PET防雾易揭膜的制备方法，包括以下步骤：The invention provides a method for preparing a PET anti-fog and easy-to-remove film, comprising the following steps:
将BOPET单面热封膜放卷，对其热封面电晕处理，然后涂布上述技术方案所述的PET热封膜涂布防雾剂，烘干，检测和收卷，得到PET防雾易揭膜。Unwind the BOPET single-sided heat-sealable film, corona-treat the heat-sealed surface, then apply the PET heat-sealable film described in the above technical solution, apply anti-fogging agent, dry, detect and rewind to obtain PET anti-fog easy Peel off the film.
本发明提供的方法简单，性价比高，在BOPET单面热封膜的热封面上直接涂布防雾剂即可；本发明采用的上述BOPET单面热封膜与我司新开发的几种防雾剂都具有良好的冷热防雾效果，而且性价比较高。The method provided by the present invention is simple and cost-effective, and the antifogging agent can be directly coated on the heat cover of the BOPET single-sided heat-sealing film; Fogs have good cold and hot anti-fog effects, and are more cost-effective.
本发明优选在50～120N的张力下展开所述BOPET单面热封膜膜卷,膜卷经过多个导辊连续向前运行，并采用两个相同工位相互交替工作，运用自动拼接及快速换膜，达到连续放卷换卷之目的；In the present invention, the BOPET single-sided heat-sealed film roll is preferably unfolded under a tension of 50-120N. The film roll runs forward continuously through a plurality of guide rollers, and uses two identical stations to work alternately, using automatic splicing and fast Change the film to achieve the purpose of continuous unwinding and changing;
薄膜穿过电晕辊中间，对PET单面热封膜的热封面进行电晕处理；所述电晕处理的功率为5.0～10.0KW；经电晕处理后，使得热封膜表面形成很多均匀密集孔洞及形成羟基、羧基等离子键，大大提高后续涂布的附着力。The film passes through the middle of the corona roller, and corona treatment is performed on the hot cover of the PET single-sided heat-sealing film; the power of the corona treatment is 5.0-10.0KW; after the corona treatment, many uniform Dense holes and the formation of hydroxyl, carboxyl and other ionic bonds greatly improve the adhesion of subsequent coatings.
本发明优选通过涂布辊逆向辊吻式将上述技术方案所述防雾剂涂布在所述BOPET单面热封膜的热封面上；所述防雾剂的涂布量优选为0.05～0.5g/m 2，涂布的速度为170～500m/min。 In the present invention, the anti-fogging agent described in the above technical solution is preferably coated on the heat cover of the BOPET single-sided heat-sealing film by means of a reverse roller kissing method of the coating roller; the coating amount of the anti-fogging agent is preferably 0.05 to 0.5 g/m 2 , the coating speed is 170-500m/min.
涂布后进行烘干，在烘干过程中，薄膜需要在一定张力下控制，张力大小的原则，满足薄膜拉直拉平即可，张力控制在40～120N之间。烘干在烘箱中进行；采用分段式烘干，每段的温度和时间不同，优选分为3～5段，温度一般呈递减设置；即前段一般为110～120℃，后段一般为100～110℃，表面涂料的烘干总时间：10～25秒。第一段中还设有红外加热，所述红外温度为110～130℃， 时间为2.0～5.0秒。Drying is carried out after coating. During the drying process, the film needs to be controlled under a certain tension. The principle of tension is to meet the requirements of straightening and flattening the film. The tension should be controlled between 40 and 120N. Drying is carried out in an oven; segmented drying is adopted, and the temperature and time of each segment are different. It is preferably divided into 3 to 5 segments, and the temperature is generally set in a decreasing manner; that is, the front segment is generally 110 ~ 120 ° C, and the rear segment is generally 100 ° C. ～110℃, the total drying time of the surface coating: 10～25 seconds. Infrared heating is also provided in the first section, the infrared temperature is 110-130° C., and the time is 2.0-5.0 seconds.
本发明采用在线检测工序，采用相机在线图像扫描的工作原理，在生产线高速生产时，采用光源照射产品表面，同时通过相机实时扫描并采集光源照射处的产品图像，将采集的图像进行处理与分割，并记录标记，所述的相机为CCD工业相机，所述的光源为高亮度LED线性聚光光源，用于判定产品质量及烘干情况。The present invention adopts the online detection process and the working principle of online image scanning of the camera. During the high-speed production of the production line, the light source is used to irradiate the surface of the product, and at the same time, the camera scans in real time and collects the product image at the place irradiated by the light source, and processes and divides the collected image. , and record marks, the camera is a CCD industrial camera, and the light source is a high-brightness LED linear spot light source, which is used to determine product quality and drying conditions.
本发明对薄膜进行收卷，收卷时需要控制收卷的张力及压辊的压力，收到的卷材由小变大时，所受的张力及压力也由大变小的过程有一最佳衰减率，工艺过程需要根据基材膜、涂布量、膜宽、膜厚等做精细的设定，收卷的张力在50～110N，压辊压力在3.0±2kg。The present invention rewinds the film, and it is necessary to control the tension of the rewinding and the pressure of the pressure roller during the rewinding. When the received coil material changes from small to large, the tension and pressure on it also change from large to small. Attenuation rate, the process needs to be finely set according to the substrate film, coating amount, film width, film thickness, etc. The winding tension is 50-110N, and the pressure of the roller is 3.0±2kg.
本发明优选收卷后在自然环境下，将卷材常温固化45～50h，使得单面热封膜与涂布层进一步交联，提高涂层的附着力，及释放膜卷应力等。In the present invention, the coil is preferably cured at room temperature for 45-50 hours in a natural environment after winding, so that the single-sided heat-sealing film and the coating layer are further cross-linked, the adhesion of the coating is improved, and the stress of the film roll is released.
本发明提供了一种包装盒，包括PET包装盒本体；The invention provides a packaging box, including a PET packaging box body;
和设置在所述包装盒本体上的PET防雾易揭膜，所述PET防雾易揭膜实现包装盒本体的封口；and the PET anti-fog easy-to-remove film arranged on the packaging box body, the PET anti-fog easy-to-remove film realizes the sealing of the packaging box body;
所述PET防雾易揭膜为上述技术方案所述的PET防雾易揭膜或上述技术方案所述制备方法制备的PET防雾易揭膜。The PET anti-fog easy-release film is the PET anti-fog easy-release film described in the above technical solution or the PET anti-fog easy-release film prepared by the preparation method described in the above technical solution.
本发明提供的包装盒的本体材质为PET，封装膜的基材也为PET，符合环保要求的同一材质回收利用的要求。The main body material of the packaging box provided by the present invention is PET, and the base material of the packaging film is also PET, which meets the requirements of environmental protection and the recycling of the same material.
上述包装盒采用本发明的PET防雾易揭膜，使其冷防雾效果能够达到膜面完全没有水雾、水珠凝结，解决了包装好的生蔬、生鲜放入冰柜冷藏时冷热急速温度导致包装盒起雾现象。The above packaging box adopts the PET anti-fog and easy-to-remove film of the present invention, so that its cold anti-fog effect can achieve no water mist or condensation on the film surface, which solves the problem of cold and hot when the packaged raw vegetables and fresh products are put into the freezer for refrigeration. The rapid temperature causes the packaging box to fog up.
为了进一步说明本发明，下面结合实施例对本发明提供的一种PET热封膜涂布防雾剂、PET防雾易揭膜及其制备方法和应用进行详细地描述，但不能将它们理解为对本发明保护范围的限定。In order to further illustrate the present invention, a kind of PET heat-sealing film coated anti-fogging agent provided by the present invention, PET anti-fog easy-to-release film and its preparation method and application are described in detail below in conjunction with the examples, but they should not be understood as an explanation of the present invention. Limitation of the protection scope of the invention.
实施例1Example 1
BOPET热封膜由三层熔融共挤而成，三层物料分为上表层，芯层及热封层；BOPET heat-sealing film is formed by three-layer melt co-extrusion, and the three-layer material is divided into upper surface layer, core layer and heat-sealing layer;
上表层也叫抗粘层，由以下原料按重量百分比制成：大有光聚酯切片42％、 爽滑母料8％、抗粘母料50％；The upper surface layer is also called anti-adhesive layer, which is made of the following raw materials by weight percentage: 42% of bright polyester chips, 8% of smooth masterbatch, and 50% of anti-adhesive masterbatch;
芯层的原料为大有光聚酯切片；The raw material of the core layer is bright polyester chips;
将对苯二甲酸25％；乙二醇45％；间苯二甲酸25％；三乙基磷酸酯热稳定剂2.5％；PC-64磷钛螯合物催化剂2.0％和防粘剂SiO 2 0.5％混合，得到热封混合料。 25% terephthalic acid; 45% ethylene glycol; 25% isophthalic acid; 2.5% triethyl phosphate heat stabilizer; PC-64 phosphorus titanium chelate catalyst 2.0% and anti-blocking agent SiO 2 0.5 % mixed to obtain a heat-sealed compound.
将抗粘层物料、芯层物料和热封混合料分别进行干燥处理，三层熔融共挤，流延铸片、纵向拉伸、横向拉伸、牵引收卷，分切，得到BOPET单面热封膜，其中热封层的厚度为5μm；Dry the anti-adhesive layer material, core layer material and heat-sealing mixture separately, three-layer melt co-extrusion, cast casting, longitudinal stretching, transverse stretching, traction winding, slitting, and obtain BOPET single-sided thermal Sealing film, wherein the thickness of the heat-sealing layer is 5 μm;
将丙烯酸接枝改性聚酯多元醇8.5％；六亚甲基二异氰酸酯2.5％；丙酮3.5％；二羟甲基丙酸3.3％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5％；马来酸酐2.0％；异丙醇2.5％；乙二醇2.0％；过硫酸钠类引发剂0.5％；二丁基锡二月桂酸酯催化剂1.1％；聚醚类消泡剂0.5％；棕榈蜡防粘剂1.6％；SiO 2防粘剂0.5％和软水70％混合，得到防雾剂； Acrylic graft modified polyester polyol 8.5%; Hexamethylene diisocyanate 2.5%; Acetone 3.5%; Dimethylol propionic acid 3.3%; Sodium acid salt 1.5%; maleic anhydride 2.0%; isopropanol 2.5%; ethylene glycol 2.0%; sodium persulfate initiator 0.5%; dibutyltin dilaurate catalyst 1.1%; %; palm wax anti-adhesive agent 1.6%; SiO 2 anti-adhesive agent 0.5% and soft water 70% mix to obtain anti-fogging agent;
将上述BOPET单面热封膜在80N下的张力下放卷，薄膜穿过电晕辊中间，对单面热封膜的热封面进行电晕处理，电晕处理的功率为8KW，通过涂布辊逆转辊吻式将所述防雾剂涂布在BOPET单面热封薄膜热封面上，涂布量为0.3g/m 2，涂布速度为200m/min；烘干固化；在线检测，在张力为60N，压辊压力在3Kg下收卷；最后在自然环境下常温固化2天，得到PET防雾易揭膜，所述PET防雾易揭膜上的防雾层的厚度为0.3μm。 Unwind the above-mentioned BOPET single-sided heat-sealing film under a tension of 80N, pass the film through the middle of the corona roller, and perform corona treatment on the hot surface of the single-sided heat-sealing film. The anti-fogging agent is coated on the heat cover of the BOPET single-sided heat-sealing film by reverse roller kissing, the coating amount is 0.3g/m 2 , and the coating speed is 200m/min; drying and curing; The pressure is 60N, and the pressure of the pressing roller is wound at 3Kg; finally, it is cured at room temperature in a natural environment for 2 days to obtain a PET anti-fog easy-to-release film, and the thickness of the anti-fog layer on the PET anti-fog easy-to-release film is 0.3 μm.
本发明在150℃*0.14MPa*1S的热封条件下，将PET防雾易揭膜与PET盒本体热封，热封强度为4.0N/15mm。The present invention heat-seals the PET anti-fog easy-to-release film and the PET box body under the heat-sealing condition of 150°C*0.14MPa*1S, and the heat-sealing strength is 4.0N/15mm.
本发明采用雾度仪和光泽度仪测试实施例1制备的PET防雾易揭膜的雾度和光泽度；实施例1制备的PET防雾易揭膜的雾度为2.5％，光泽度为98.9GU。The present invention adopts haze meter and gloss meter to test the haze and the glossiness of the PET anti-fog easy-release film prepared in Example 1; the haze of the PET anti-fog easy-release film prepared in Example 1 is 2.5%, and the gloss is 98.9GU.
实施例2Example 2
与实施例1不同的是:Different from embodiment 1 is:
将丙烯酸接枝改性聚酯多元醇11％；六亚甲基二异氰酸酯3.6％；丙酮5％；二羟甲基丙酸3.2％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐3.0％；马来酸酐2.0％；异丙醇3.2％；乙二醇3.5％；过硫酸钠类引发剂1.0％；二丁基锡二月桂酸酯催 化剂1.0％；聚醚类消泡剂0.5％；棕榈蜡防粘剂2.0％；SiO 2防粘剂1.0％和软水60％混合，得到防雾剂。 Acrylic acid graft modified polyester polyol 11%; hexamethylene diisocyanate 3.6%; acetone 5%; dimethylol propionic acid 3.2%; 3-allyloxy-2-hydroxy-1-propanesulfonate Sodium acid salt 3.0%; Maleic anhydride 2.0%; Isopropanol 3.2%; Ethylene glycol 3.5%; Sodium persulfate initiator 1.0%; Dibutyltin dilaurate catalyst 1.0%; %; palm wax anti-sticking agent 2.0%; SiO 2 anti-sticking agent 1.0% and soft water 60% mixed to obtain anti-fogging agent.
本发明采用雾度仪和光泽度仪测试实施例2制备的PET防雾易揭膜的雾度和光泽度；实施例2制备的PET防雾易揭膜的雾度为1.25％，光泽度为98.9GU。The present invention adopts haze meter and gloss meter to test the haze and the glossiness of the PET anti-fog easy-release film prepared in Example 2; the haze of the PET anti-fog easy-release film prepared in Example 2 is 1.25%, and the gloss is 98.9GU.
实施例3Example 3
与实施例1不同的是:Different from embodiment 1 is:
将丙烯酸接枝改性聚酯多元醇10％；六亚甲基二异氰酸酯2.5％；丙酮4.4％；二羟甲基丙酸3.5％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐2.5％；马来酸酐2.0％；异丙醇3.0％；乙二醇3.0％；过硫酸钠类引发剂0.5％；二丁基锡二月桂酸酯催化剂1.0％；聚醚类消泡剂0.4％；棕榈蜡防粘剂1.7％；SiO 2防粘剂0.5％和软水65％混合，得到防雾剂。 Acrylic graft modified polyester polyol 10%; hexamethylene diisocyanate 2.5%; acetone 4.4%; dimethylol propionic acid 3.5%; Sodium acid salt 2.5%; Maleic anhydride 2.0%; Isopropanol 3.0%; Ethylene glycol 3.0%; Sodium persulfate initiator 0.5%; Dibutyltin dilaurate catalyst 1.0%; %; palm wax anti-adhesive agent 1.7%; SiO 2 anti-adhesive agent 0.5% and soft water 65% mixed to obtain anti-fogging agent.
本发明采用雾度仪和光泽度仪测试实施例3制备的PET防雾易揭膜的雾度和光泽度；实施例3制备的PET防雾易揭膜的雾度1.25％，光泽度为98.9GU。The present invention uses a haze meter and a gloss meter to test the haze and gloss of the PET anti-fog and easy-to-remove film prepared in Example 3; the haze and gloss of the PET anti-fog and easy-to-remove film prepared in Example 3 are 1.25%, and the gloss is 98.9% GU.
由以上实施例可知，本发明提供了一种PET热封膜涂布防雾剂，以质量分数计，包括以下组分：丙烯酸接枝改性聚酯多元醇8～11％；六亚甲基二异氰酸酯2～4％；丙酮3～5％；二羟甲基丙酸3～4％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5～3.5％；马来酸酐1.1～2.2％；异丙醇2.5～3.5％；乙二醇2.0～3.5％；引发剂0.1～1.0％；催化剂0.2～1.2％；消泡剂0.3～0.5％；棕榈蜡防粘剂1.5～2.5％；SiO 2防粘剂0.5～1.0％；软水60～70％。本发明采用上述组分的防雾剂具有良好的防雾效果，还能与PET盒本体具有良好的热封强度，达到易揭盖效果；符合环保要求。 As can be seen from the above examples, the present invention provides a PET heat-sealing film coating antifogging agent, which comprises the following components in terms of mass fraction: 8-11% of acrylic acid graft modified polyester polyol; hexamethylene Diisocyanate 2~4%; Acetone 3~5%; Dimethylol propionic acid 3~4%; 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt 1.5~3.5%; Maleic anhydride 1.1～2.2%; Isopropanol 2.5～3.5%; Ethylene glycol 2.0～3.5%; Initiator 0.1～1.0%; Catalyst 0.2～1.2%; Defoamer 0.3～0.5%; %; SiO 2 anti-sticking agent 0.5 ~ 1.0%; soft water 60 ~ 70%. The antifogging agent adopting the above-mentioned components has good antifogging effect, can also have good heat sealing strength with the PET box body, achieves the effect of easy peeling, and meets the requirements of environmental protection.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.

Claims (8)

  1. 一种PET热封膜涂布防雾剂，以质量分数计，包括以下组分：A PET heat-sealing film coating antifogging agent, in mass fraction, comprises the following components:
    丙烯酸接枝改性聚酯多元醇8～11％；六亚甲基二异氰酸酯2～4％；丙酮3～5％；二羟甲基丙酸3～4％；3-烯丙氧基-2-羟基-1-丙烷磺酸钠盐1.5～3.5％；马来酸酐1.1～2.2％；异丙醇2.5～3.5％；乙二醇2.0～3.5％；引发剂0.1～1.0％；催化剂0.2～1.2％；消泡剂0.3～0.5％；棕榈蜡防粘剂1.5～2.5％；SiO 2防粘剂0.5～1.0％；软水60～70％。 Acrylic graft modified polyester polyol 8-11%; hexamethylene diisocyanate 2-4%; acetone 3-5%; dimethylol propionic acid 3-4%; 3-allyloxy-2 -Hydroxy-1-propanesulfonic acid sodium salt 1.5-3.5%; maleic anhydride 1.1-2.2%; isopropanol 2.5-3.5%; ethylene glycol 2.0-3.5%; initiator 0.1-1.0%; catalyst 0.2-1.2 %; defoamer 0.3-0.5%; palm wax anti-sticking agent 1.5-2.5%; SiO 2 anti-sticking agent 0.5-1.0%; soft water 60-70%.
  2. 一种PET防雾易揭膜，包括BOPET单面热封膜；A PET anti-fog and easy-to-release film, including BOPET single-sided heat-sealing film;
    和复合在所述BOPET单面热封膜的热封面上的防雾层；And the anti-fog layer compounded on the heat cover of the BOPET single-sided heat-sealing film;
    所述防雾层由权利要求1所述PET热封膜涂布防雾剂涂布制得。The anti-fog layer is prepared by coating the anti-fog agent on the PET heat-sealing film according to claim 1.
  3. 根据权利要求2所述的PET防雾易揭膜，其特征在于，所述热封层以质量分数计，包括以下原料：The PET anti-fog and easy-to-release film according to claim 2, wherein the heat-sealing layer comprises the following raw materials in terms of mass fraction:
    对苯二甲酸25～35％；乙二醇35～45％；间苯二甲酸20～25％；三乙基磷酸酯热稳定剂2.5～4.5％；PC-64磷钛螯合物催化剂2.0～3.0％；防粘剂SiO 20.5～1.0％。 Terephthalic acid 25-35%; Ethylene glycol 35-45%; Isophthalic acid 20-25%; Triethyl phosphate heat stabilizer 2.5-4.5%; PC-64 phosphorus-titanium chelate catalyst 2.0- 3.0%; anti-blocking agent SiO 2 0.5-1.0%.
  4. 根据权利要求2所述的PET防雾易揭膜，其特征在于，所述防雾层的厚度为950～1050nm。The PET anti-fog easy-to-peel film according to claim 2, wherein the thickness of the anti-fog layer is 950-1050 nm.
  5. 一种PET防雾易揭膜的制备方法，包括以下步骤：A preparation method of PET anti-fog easy-to-release film, comprising the following steps:
    将BOPET单面热封膜放卷，对其热封面电晕处理，然后涂布权利要求1所述的PET热封膜涂布防雾剂，烘干，检测和收卷，得到PET防雾易揭膜。Unwind the BOPET single-sided heat-sealable film, corona-treat the heat-sealed film, then coat the PET heat-sealable film according to claim 1, apply the anti-fogging agent, dry, detect and wind-up to obtain the PET anti-fog film Peel off the film.
  6. 根据权利要求5所述的制备方法，其特征在于，所述电晕处理的功率为5.0～10.0KW。The preparation method according to claim 5, characterized in that the power of the corona treatment is 5.0-10.0KW.
  7. 根据权利要求5所述的制备方法，其特征在于，涂布量为0.05～0.5g/m 2，涂布的速度为170～500m/min。 The preparation method according to claim 5, characterized in that the coating amount is 0.05-0.5 g/m 2 , and the coating speed is 170-500 m/min.
  8. 一种包装盒，其特征在于，包括PET包装盒本体；A packaging box, characterized in that it includes a PET packaging box body;
    和设置在所述包装盒本体上的PET防雾易揭膜，所述PET防雾易揭膜实现包装盒本体的封口；and the PET anti-fog easy-to-remove film arranged on the packaging box body, the PET anti-fog easy-to-remove film realizes the sealing of the packaging box body;
    所述PET防雾易揭膜为权利要求2～4任一项所述的PET防雾易揭膜或权 利要求5～7任一项所述制备方法制备的PET防雾易揭膜。The PET anti-fog easy-release film is the PET anti-fog easy-release film according to any one of claims 2-4 or the PET anti-fog easy-release film prepared by the preparation method described in any one of claims 5-7.
PCT/CN2021/101754 2021-05-21 2021-06-23 Pet heat-sealing film coating anti-fogging agent, pet anti-fogging easy-release film, preparation method therefor and application thereof WO2022241901A1 (en)

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CN113637205B (en) * 2021-09-03 2022-10-14 海南赛诺实业有限公司 Anti-fog easy-uncovering antibacterial high-barrier BOPET coating film and preparation method thereof
CN113773619B (en) * 2021-09-13 2022-12-30 海南赛诺实业有限公司 Antifogging high-barrier BOPET film and manufacturing method thereof
CN113667169A (en) * 2021-09-17 2021-11-19 海南赛诺实业有限公司 High-liquid-resistance antifogging easy-to-tear PET (polyethylene terephthalate) coating film and manufacturing method thereof
CN113651987A (en) * 2021-09-17 2021-11-16 海南赛诺实业有限公司 PET antifogging easy-to-tear film and manufacturing method thereof
CN113788973A (en) * 2021-09-17 2021-12-14 海南赛诺实业有限公司 PET easy-to-tear film and preparation method thereof
CN113801357A (en) * 2021-09-17 2021-12-17 海南赛诺实业有限公司 PP easy-to-tear film and preparation method thereof

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