Packaging high-barrier composite film and preparation method thereof

Abstract

The invention discloses a packaging high-barrier composite film and a preparation method thereof, and relates to the field of layered materials, the packaging high-barrier composite film sequentially comprises a layer A, a layer B and a layer C; the heat-resistant layer material is prepared from the following raw materials: aluminum oxide and magnesium oxide; the preparation raw materials of the reinforcing layer material comprise a modified ethylene-vinyl alcohol copolymer and polyamide-imide; the barrier layer material is prepared from the following raw materials: a modified ethylene-vinyl alcohol copolymer, high-density polyethylene and polyether-ether-ketone resin; the heat sealing layer material is prepared from the following raw materials: chlorinated polypropylene, a modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate, the modified ethylene-vinyl alcohol copolymer is prepared from the following materials: an ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1, 4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1, 1-bis (trifluoromethyl)-2, 2, 3, 3, 3, 3-pentafluoropropyl 2-fluoroacrylate and acetone, and the modified ethylene-vinyl alcohol copolymer is prepared from an ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1, 4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1, 1-bis (trifluoromethyl)-2, 2, 3, 3, 3, 3-pentafluoropropyl 2-fluoroacrylate and acetone. The packaging high-barrier composite film provided by the invention is excellent in barrier property.

Description

Technical Field

[0001] The present invention relates to the field of layered materials, and in particular to a packaging high-barrier composite film and a preparation method thereof. Background Art

[0002] Polyethylene, a high-molecular-weight organic compound formed by the addition polymerization of ethylene, is non-toxic, tasteless, and odorless. It is recognized worldwide as the best material for food contact and meets food packaging hygiene standards. However, due to its poor gas barrier properties, even packaging films made from multi-layer polyethylene co-extrusion still have relatively poor barrier properties, making them unsuitable for packaging liquid foods such as beverages, juice, and milk. Patent Publication No. CN115572404A discloses a high-barrier composite film based on blown polyethylene film and its preparation method. However, the barrier properties of this polyethylene film still need to be improved and do not meet application requirements.

[0003] In summary, after extensive searches by the applicant, it has been found that at least one problem in the art is that the barrier properties of existing polyethylene films are not excellent enough. Therefore, there is a need to develop or improve a high-barrier composite film for packaging and a preparation method thereof. Summary of the Invention

[0004] Based on this, in order to solve the problem that the barrier performance of existing polyethylene films is poor and cannot meet the use requirements, the present invention provides a packaging high-barrier composite film and a preparation method thereof. The specific technical solution is as follows: A packaging high-barrier composite film, which comprises layer A, layer B and layer C in sequence; The A layer includes a heat-resistant layer, a base layer, a connecting layer, a reinforcement layer, an aluminum plating layer and a protective layer in sequence; The B layer is a barrier layer; The C layer is a heat sealing layer; The heat-resistant layer is prepared from a heat-resistant layer material, and the raw materials for preparing the heat-resistant layer material include aluminum oxide and magnesium oxide; The reinforcing layer is prepared from a reinforcing layer material, and the raw materials for preparing the reinforcing layer material include modified ethylene-vinyl alcohol copolymer and polyamide-imide; The barrier layer is prepared from a barrier layer material, wherein the raw materials for preparing the barrier layer material include modified ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin; The heat sealing layer is prepared from a heat sealing layer material, wherein the raw materials for preparing the heat sealing layer material include chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate; The preparation materials of the modified ethylene-vinyl alcohol copolymer include ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate and acetone.

[0005] Furthermore, the base layer is prepared from a base layer material, and the base layer material includes 35-50% high-density polyethylene and 50-65% low-density polyethylene.

[0006] Furthermore, the connecting layer is prepared from a connecting layer material, and the connecting layer material includes at least one of maleic anhydride-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer and ethylene-butyl acrylate copolymer.

[0007] Furthermore, the aluminum plating layer is prepared from an aluminum plating layer material, and in terms of mass ratio, the aluminum plating layer material includes 3-7% aluminum oxide and 97-93% polyethylene, and the protective layer material is polyurethane.

[0008] Furthermore, the preparation method of the modified ethylene-vinyl alcohol copolymer comprises the following steps: The ethylene-vinyl alcohol copolymer is added to the acetone, and then ultrasonicated at a frequency of 80-120 kHz for 15-25 minutes, and then the 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and the 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate are added, and stirred at a speed of 800-1000 r / min. The mixture is then heated to 85-95° C. and sealed for reaction for 2.3-2.7 hours. The reaction is terminated and cooled to room temperature, and then the product is taken out and dried at 80-90° C. to obtain the modified ethylene-vinyl alcohol copolymer; The mass ratio of the ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate and acetone is 60-70:3-7:3-7:20-30.

[0009] Furthermore, the preparation method of the reinforcement layer material comprises the following steps: extruding the modified ethylene-vinyl alcohol copolymer and polyamide-imide in a twin-screw extruder to obtain the reinforcement layer material; The mass ratio of the modified ethylene-vinyl alcohol copolymer to the polyamide-imide is 65-75:25-35.

[0010] Furthermore, the preparation method of the heat-resistant layer material comprises the following steps: The aluminum oxide and magnesium oxide are added to water, stirred at a speed of 1300-1700 r / min for 1-2 hours, and then ultrasonicated at a frequency of 80-120 kHz for 2.1-2.5 hours to obtain the heat-resistant layer material; The mass ratio of the aluminum oxide, magnesium oxide and water is 10-15:3-7:30-40.

[0011] Furthermore, the preparation method of the heat-sealing layer material comprises the following steps: Extruding the chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate in a twin-screw extruder to obtain the heat sealing layer material; The mass ratio of the chlorinated polypropylene, the modified ethylene-vinyl alcohol copolymer, the polyphenylene sulfide and the calcium stearate is 25-30:30-40:10-15:0.5-1.5.

[0012] Furthermore, the preparation method of the barrier layer material comprises the following steps: Extruding the ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin in a twin-screw extruder to obtain the barrier layer material; The mass ratio of the ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin is 20-25:30-40:10-15.

[0013] The present technical solution also provides a method for preparing a high-barrier composite film for packaging, which comprises the following steps: The base layer material, the connecting layer material, the reinforcing layer material, the aluminized layer material and the protective layer material are sequentially added into a five-layer co-extrusion blown film line to obtain an A layer precursor including a base layer, a connecting layer, a reinforcing layer, an aluminized layer and a protective layer, and the heat-resistant layer material is coated or sprayed on the outer surface of the base layer of the A layer precursor to obtain an A layer; Blow molding the barrier layer material to obtain layer B; Blow molding the heat sealing layer material to obtain layer C; Bonding the layer A, layer B, and layer C using a polyimide adhesive to obtain the packaging high-barrier composite film; The thickness of the base layer is 45-55% of the total thickness of the A layer, the thickness of the connecting layer is 5-15% of the total thickness of the A layer, the thickness of the reinforcing layer is 5-15% of the total thickness of the A layer, the thickness of the aluminum plating layer is 5-15% of the total thickness of the A layer, the thickness of the protective layer is 5-15% of the total thickness of the A layer, and the thickness of the heat-resistant layer is 5-15% of the total thickness of the A layer; The thickness ratio of the A layer, the B layer and the C layer is 15-25:5-15:5-15.

[0014] The high barrier composite film for packaging provided by the above technical solution has a reinforcing layer material prepared from raw materials including modified ethylene-vinyl alcohol copolymer and polyamide-imide, a barrier layer material prepared from raw materials including modified ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin, a heat-sealing layer material prepared from raw materials including chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate, and a modified ethylene-vinyl alcohol copolymer prepared from raw materials including ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2- Fluoroacrylate and acetone, the barrier properties of the obtained high-barrier composite film for packaging are excellent; specifically, since 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate themselves have multifunctional groups, their fluorine groups, chlorine groups, benzene rings, nitrogen-containing rings, carboxyl groups, alkenyl groups and ester groups are connected in multiple dimensions, and further, some groups are connected with ethylene-vinyl alcohol copolymer, so that the modified ethylene-vinyl alcohol copolymer is denser in molecular size and the barrier properties are significantly enhanced. Therefore, the barrier properties of the high-barrier composite film for packaging prepared therefrom are excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the high barrier composite film for packaging of the present application.

[0016] Description of reference numerals: 1. Heat-resistant layer; 2. Base layer; 3. Connecting layer; 4. Reinforcement layer; 5. Aluminum-plated layer; 6. Protective layer; 7. Barrier layer; 8. Heat-sealing layer. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] A high-barrier composite film for packaging in one embodiment of the present invention comprises layer A, layer B, and layer C in sequence; The A layer includes a heat-resistant layer 1, a base layer 2, a connecting layer 3, a reinforcement layer 4, an aluminum-plated layer 5 and a protective layer 6 in sequence; The B layer is a barrier layer 7; The C layer is a heat sealing layer 8; The heat-resistant layer 1 is made of a heat-resistant layer material, and the raw materials for preparing the heat-resistant layer material include aluminum oxide and magnesium oxide; The reinforcing layer 4 is prepared from a reinforcing layer material, wherein the raw materials for preparing the reinforcing layer material include modified ethylene-vinyl alcohol copolymer and polyamide-imide; The barrier layer 7 is made of a barrier layer material, wherein the raw materials for preparing the barrier layer material include modified ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin; The heat sealing layer 8 is prepared from a heat sealing layer material, wherein the raw materials for preparing the heat sealing layer material include chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate; The preparation materials of the modified ethylene-vinyl alcohol copolymer include ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate and acetone.

[0020] In one embodiment, the base layer 2 is prepared from a base layer material, and the base layer material includes 35-50% high-density polyethylene and 50-65% low-density polyethylene.

[0021] In one embodiment, the connecting layer 3 is prepared from a connecting layer material, and the connecting layer material includes at least one of maleic anhydride-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer and ethylene-butyl acrylate copolymer.

[0022] In one embodiment, the aluminum coating layer 5 is prepared from an aluminum coating material. In terms of mass ratio, the aluminum coating material includes 3-7% aluminum oxide and 97-93% polyethylene, and the protective layer material is polyurethane.

[0023] In one embodiment, the preparation method of the modified ethylene-vinyl alcohol copolymer comprises the following steps: The ethylene-vinyl alcohol copolymer is added to the acetone, and then ultrasonicated at a frequency of 80-120 kHz for 15-25 minutes, and then the 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and the 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate are added, and stirred at a speed of 800-1000 r / min. The mixture is then heated to 85-95° C. and sealed for reaction for 2.3-2.7 hours. The reaction is terminated and cooled to room temperature, and then the product is taken out and dried at 80-90° C. to obtain the modified ethylene-vinyl alcohol copolymer; The mass ratio of the ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate and acetone is 60-70:3-7:3-7:20-30.

[0024] In one embodiment, the method for preparing the reinforcement layer material comprises the following steps: extruding the modified ethylene-vinyl alcohol copolymer and polyamide-imide in a twin-screw extruder to obtain the reinforcement layer material; The mass ratio of the modified ethylene-vinyl alcohol copolymer to the polyamide-imide is 65-75:25-35.

[0025] In one embodiment, the method for preparing the heat-resistant layer material comprises the following steps: The aluminum oxide and magnesium oxide are added to water, stirred at a speed of 1300-1700 r / min for 1-2 hours, and then ultrasonicated at a frequency of 80-120 kHz for 2.1-2.5 hours to obtain the heat-resistant layer material; The mass ratio of the aluminum oxide, magnesium oxide and water is 10-15:3-7:30-40.

[0026] In one embodiment, the method for preparing the heat-sealing layer material comprises the following steps: Extruding the chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate in a twin-screw extruder to obtain the heat sealing layer material; The mass ratio of the chlorinated polypropylene, the modified ethylene-vinyl alcohol copolymer, the polyphenylene sulfide and the calcium stearate is 25-30:30-40:10-15:0.5-1.5.

[0027] In one embodiment, the method for preparing the barrier layer material comprises the following steps: Extruding the ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin in a twin-screw extruder to obtain the barrier layer material; The mass ratio of the ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin is 20-25:30-40:10-15.

[0028] In one embodiment, the present technical solution provides a method for preparing a high-barrier composite film for packaging, which comprises the following steps: The base layer material, the connecting layer material, the reinforcing layer material, the aluminized layer material and the protective layer material are sequentially added into a five-layer co-extrusion blown film line to obtain an A layer precursor including a base layer, a connecting layer, a reinforcing layer, an aluminized layer and a protective layer, and the heat-resistant layer material is coated or sprayed on the outer surface of the base layer of the A layer precursor to obtain an A layer; Blow molding the barrier layer material to obtain layer B; Blow molding the heat sealing layer material to obtain layer C; Bonding the layer A, layer B, and layer C using a polyimide adhesive to obtain the packaging high-barrier composite film; The thickness of the base layer is 45-55% of the total thickness of the A layer, the thickness of the connecting layer is 5-15% of the total thickness of the A layer, the thickness of the reinforcing layer is 5-15% of the total thickness of the A layer, the thickness of the aluminum plating layer is 5-15% of the total thickness of the A layer, the thickness of the protective layer is 5-15% of the total thickness of the A layer, and the thickness of the heat-resistant layer is 5-15% of the total thickness of the A layer; The thickness ratio of the A layer, the B layer and the C layer is 15-25:5-15:5-15.

[0029] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the high barrier composite film for packaging of the present application, from Figure 1 It can be seen that the packaging high barrier composite film of the present application includes layer A, layer B and layer C in sequence; The A layer includes a heat-resistant layer 1, a base layer 2, a connecting layer 3, a reinforcing layer 4, an aluminum-plated layer 5 and a protective layer 6 in sequence; the B layer is a barrier layer 7; and the C layer is a heat-sealing layer 8.

[0030] The embodiments of the present invention will be described in detail below with reference to specific examples.

[0031] Example 1: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes, and then 5 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 5 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were added, and stirred at a speed of 900 r / min. Then, the temperature was raised to 90° C. and the mixture was sealed and reacted for 2.5 hours. The reaction was terminated and cooled to room temperature. Then, the product was taken out and dried at 85° C. to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: The above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a packaging high-barrier composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0032] Example 2: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes, and then 7 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 5 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were added, and stirred at a speed of 900 r / min. Then, the temperature was raised to 90° C. and the mixture was sealed and reacted for 2.5 hours. The reaction was terminated and cooled to room temperature. Then, the product was taken out and dried at 85° C. to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: The above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a packaging high-barrier composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0033] Example 3: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes, and then 3 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 5 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were added, and stirred at a speed of 900 r / min. Then, the temperature was raised to 90° C. and the mixture was sealed and reacted for 2.5 hours. The reaction was terminated and cooled to room temperature. Then, the product was taken out and dried at 85° C. to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: The above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a packaging high-barrier composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0034] Example 4: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes, and then 5 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 7 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were added, and stirred at a speed of 900 r / min. Then, the temperature was raised to 90° C. and the mixture was sealed and reacted for 2.5 hours. The reaction was terminated and cooled to room temperature. Then, the product was taken out and dried at 85° C. to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: The above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a packaging high-barrier composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0035] Example 5: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes, and then 5 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 3 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were added, and stirred at a speed of 900 r / min. Then, the temperature was raised to 90° C. and the mixture was sealed and reacted for 2.5 hours. The reaction was terminated and cooled to room temperature. Then, the product was taken out and dried at 85° C. to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: The above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a packaging high-barrier composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0036] Comparative Example 1: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes, and then 5 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were added, and stirred at a speed of 900 r / min. Then, the temperature was raised to 90°C and sealed for reaction for 2.5 hours. The reaction was terminated and cooled to room temperature. The product was then taken out and dried at 85°C to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: the above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0037] Comparative Example 2: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer were added to 25 parts of acetone by mass, and then ultrasonicated at a frequency of 100 kHz for 20 minutes. Then, 5 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid were added and stirred uniformly at a speed of 900 r / min. Then, the temperature was raised to 90°C and sealed for reaction for 2.5 hours. After the reaction was terminated and cooled to room temperature, the product was taken out and dried at 85°C to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: the above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0038] Comparative Example 3: Preparation of modified ethylene-vinyl alcohol copolymer: 65 parts of ethylene-vinyl alcohol copolymer, 5 parts of 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, and 5 parts of 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate were uniformly mixed by mass to obtain a modified ethylene-vinyl alcohol copolymer; Preparation of the reinforcement layer material: According to parts by mass, 70 parts of modified ethylene-vinyl alcohol copolymer and 30 parts of polyamide-imide were extruded in a twin-screw extruder to obtain a reinforcement layer material; Preparation of heat-resistant layer material: 13 parts of aluminum oxide and 5 parts of magnesium oxide were added to 35 parts of water by mass, stirred at a speed of 1500 r / min for 1.5 hours, and then ultrasonicated at a frequency of 100 kHz for 2.3 hours to obtain a heat-resistant layer material; Preparation of heat seal layer material: According to parts by mass, 27 parts of chlorinated polypropylene, 35 parts of modified ethylene-vinyl alcohol copolymer, 13 parts of polyphenylene sulfide and 1 part of calcium stearate were extruded in a twin-screw extruder to obtain a heat seal layer material; Preparation of barrier layer material: According to parts by mass, 23 parts of ethylene-vinyl alcohol copolymer, 35 parts of high-density polyethylene and 13 parts of polyetheretherketone resin were extruded in a twin-screw extruder to obtain a barrier layer material; By mass, the base layer material includes 42% high-density polyethylene and 58% low-density polyethylene, the aluminized layer material includes 5% aluminum oxide and 95% polyethylene, the connecting layer material is ethylene-acrylic acid copolymer, and the protective layer material is polyurethane; Preparation of high-temperature resistant and high-barrier composite film: the above-mentioned base layer material, connecting layer material, reinforcing layer material, aluminum-plated layer material and protective layer material are sequentially added to a five-layer co-extrusion blown film line to obtain a layer A precursor including a base layer, a connecting layer, a reinforcing layer, an aluminum-plated layer and a protective layer, and the heat-resistant layer material is coated on the outer surface of the base layer of the layer A precursor to obtain layer A; the barrier layer material is blow-molded to obtain layer B; the heat-sealing layer material is blow-molded to obtain layer C; the A layer, the B layer and the C layer are bonded using a polyimide adhesive to obtain a composite film, wherein layer A is 20μm, layer B is 10μm, layer C is 10μm, the heat-resistant layer is 2μm, the base layer is 10μm, the connecting layer is 1μm, the reinforcing layer is 3μm, the aluminum-plated layer is 2μm, and the protective layer is 2μm.

[0039] The composite films obtained in Examples 1 to 5 and Comparative Examples 1 to 3 were tested, and the results are shown in Table 1.

[0040] The oxygen and nitrogen transmission rates were tested at 23°C and 0% relative humidity. Test water vapor transmission rate according to GB / T26253-2010; Table 1: Performance results

[0041] As can be seen from Table 1, the packaging high barrier composite film provided by the present invention has excellent barrier properties, specifically, its water vapor transmission rate is as low as 0.45 g / (m2). 2 ·day·atm) and below, oxygen transmission rate as low as 3.67cm 3 / (m 2 ·day·0.1MPa) and below, nitrogen permeability as low as 1.63cm 3 / (m 2 ·day·0.1MPa) and below; specifically, since 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate themselves have multifunctional groups, their fluorine groups, chlorine groups, benzene rings, nitrogen-containing rings, carboxyl groups, alkenyl groups and ester groups are connected in multiple dimensions. Furthermore, some groups are connected with ethylene-vinyl alcohol copolymers, thereby making the modified ethylene-vinyl alcohol copolymers more dense in molecular size and significantly enhancing the barrier properties. Therefore, the barrier properties of the high-barrier composite film for packaging prepared therefrom are excellent.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A high barrier composite film for packaging, characterized in that: It includes layer A, layer B and layer C in sequence; The A layer includes a heat-resistant layer, a base layer, a connecting layer, a reinforcement layer, an aluminum plating layer and a protective layer in sequence; The B layer is a barrier layer; The C layer is a heat sealing layer; The heat-resistant layer is prepared from a heat-resistant layer material, and the raw materials for preparing the heat-resistant layer material include aluminum oxide and magnesium oxide; The reinforcing layer is prepared from a reinforcing layer material, and the raw materials for preparing the reinforcing layer material include modified ethylene-vinyl alcohol copolymer and polyamide-imide; The barrier layer is prepared from a barrier layer material, wherein the raw materials for preparing the barrier layer material include modified ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin; The heat sealing layer is prepared from a heat sealing layer material, wherein the raw materials for preparing the heat sealing layer material include chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate; The preparation materials of the modified ethylene-vinyl alcohol copolymer include ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate and acetone.

2. The high barrier composite film for packaging according to claim 1, characterized in that: The base layer is prepared from a base layer material, and in terms of mass ratio, the base layer material includes 35-50% high-density polyethylene and 50-65% low-density polyethylene.

3. The high barrier composite film for packaging according to claim 1, characterized in that: The connecting layer is prepared from a connecting layer material, and the connecting layer material includes at least one of maleic anhydride-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer and ethylene-butyl acrylate copolymer.

4. The high barrier composite film for packaging according to claim 1, characterized in that: The aluminum plating layer is prepared from an aluminum plating layer material. In terms of mass ratio, the aluminum plating layer material includes 3-7% aluminum oxide and 97-93% polyethylene. The protective layer material is polyurethane.

5. The high barrier composite film for packaging according to claim 1, characterized in that: The preparation method of the modified ethylene-vinyl alcohol copolymer comprises the following steps: The ethylene-vinyl alcohol copolymer is added to the acetone, and then ultrasonicated at a frequency of 80-120 kHz for 15-25 minutes, and then the 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid and the 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate are added, and stirred at a speed of 800-1000 r / min. The mixture is then heated to 85-95° C. and sealed for reaction for 2.3-2.7 hours. The reaction is terminated and cooled to room temperature, and then the product is taken out and dried at 80-90° C. to obtain the modified ethylene-vinyl alcohol copolymer; The mass ratio of the ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1,1-bis(trifluoromethyl)-2,2,3,3,3,3-pentafluoropropyl 2-fluoroacrylate and acetone is 60-70:3-7:3-7:20-30.

6. The high barrier composite film for packaging according to claim 1, characterized in that: The preparation method of the reinforcement layer material comprises the following steps: extruding the modified ethylene-vinyl alcohol copolymer and polyamide-imide in a twin-screw extruder to obtain the reinforcement layer material; The mass ratio of the modified ethylene-vinyl alcohol copolymer to the polyamide-imide is 65-75:25-35.

7. The packaging high barrier composite film according to claim 1, characterized in that: The preparation method of the heat-resistant layer material comprises the following steps: The aluminum oxide and magnesium oxide are added to water, stirred at a speed of 1300-1700 r / min for 1-2 hours, and then ultrasonicated at a frequency of 80-120 kHz for 2.1-2.5 hours to obtain the heat-resistant layer material; The mass ratio of the aluminum oxide, magnesium oxide and water is 10-15:3-7:30-40.

8. The packaging high barrier composite film according to claim 1, characterized in that: The preparation method of the heat sealing layer material comprises the following steps: Extruding the chlorinated polypropylene, modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate in a twin-screw extruder to obtain the heat sealing layer material; The mass ratio of the chlorinated polypropylene, the modified ethylene-vinyl alcohol copolymer, the polyphenylene sulfide and the calcium stearate is 25-30:30-40:10-15:0.5-1.

5.

9. The high barrier composite film for packaging according to claim 1, characterized in that: The preparation method of the barrier layer material comprises the following steps: Extruding the ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin in a twin-screw extruder to obtain the barrier layer material; The mass ratio of the ethylene-vinyl alcohol copolymer, high-density polyethylene and polyetheretherketone resin is 20-25:30-40:10-15.

10. A method for preparing a high barrier composite film for packaging, characterized in that: The preparation method is used to prepare the packaging high-barrier composite film according to any one of claims 1 to 9, and comprises the following steps: The base layer material, the connecting layer material, the reinforcing layer material, the aluminized layer material and the protective layer material are sequentially added into a five-layer co-extrusion blown film line to obtain an A layer precursor including a base layer, a connecting layer, a reinforcing layer, an aluminized layer and a protective layer, and the heat-resistant layer material is coated or sprayed on the outer surface of the base layer of the A layer precursor to obtain an A layer; Blow molding the barrier layer material to obtain layer B; Blow molding the heat sealing layer material to obtain layer C; Bonding the layer A, layer B, and layer C using a polyimide adhesive to obtain the packaging high-barrier composite film; The thickness of the base layer is 45-55% of the total thickness of the A layer, the thickness of the connecting layer is 5-15% of the total thickness of the A layer, the thickness of the reinforcing layer is 5-15% of the total thickness of the A layer, the thickness of the aluminum plating layer is 5-15% of the total thickness of the A layer, the thickness of the protective layer is 5-15% of the total thickness of the A layer, and the thickness of the heat-resistant layer is 5-15% of the total thickness of the A layer; The thickness ratio of the A layer, the B layer and the C layer is 15-25:5-15:5-15.

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