CN110065284B - Cold-resistant tear-resistant high-temperature cooking packaging material and preparation method thereof - Google Patents

Cold-resistant tear-resistant high-temperature cooking packaging material and preparation method thereof Download PDF

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CN110065284B
CN110065284B CN201910292374.8A CN201910292374A CN110065284B CN 110065284 B CN110065284 B CN 110065284B CN 201910292374 A CN201910292374 A CN 201910292374A CN 110065284 B CN110065284 B CN 110065284B
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corona
packaging material
temperature
film
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CN110065284A (en
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谢文汇
王浩
叶青松
吴文武
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Huangshan Novel Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • C08J7/12—Chemical modification
    • C08J7/123—Treatment by wave energy or particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/10—Peculiar tacticity
    • C08L2207/14—Amorphous or atactic polypropylene

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a cold-resistant tear-resistant high-temperature cooking packaging material and a preparation method thereof. The film layer structure of the packaging material is sequentially a biaxial tension polyester film, an aluminum foil and a modified polypropylene film; the modified polypropylene film comprises a corona layer, a middle layer and a heat sealing layer, wherein the corona layer is composed of ternary random copolymer polypropylene, the middle layer is composed of random copolymer polypropylene and hydrogenated styrene-butadiene block copolymer in a mass ratio of (83-87): (13-17), and the heat sealing layer is composed of ternary random copolymer polypropylene, hydrogenated styrene-butadiene block copolymer, slipping agent, open master batch and processing aid in a mass ratio of (93-97): (4-6): 0.8-1.2): 0.1-0.3. The packaging material provided by the invention meets the requirement of high-temperature cooking resistance and has excellent low-temperature resistance.

Description

Cold-resistant tear-resistant high-temperature cooking packaging material and preparation method thereof
Technical Field
The invention relates to the field of packaging materials, in particular to a cold-resistant tear-resistant high-temperature cooking packaging material and a preparation method thereof.
Background
The high-temp. steaming and boiling packaging material is also called soft can packaging material, and is a composite plastic film bag capable of being heat-treated, and it possesses the advantages of both can container and boiling-water-resistant plastic bag. The food can be kept in the bag, sterilized and heated at high temperature (generally 120-135 ℃) and taken out for eating. It is an ideal sale packing container. Is suitable for packaging meat and bean products, is convenient, sanitary and practical, can well keep the original flavor of food, and is more popular with consumers. The high-temperature cooking packaging material is generally composed of a biaxially oriented polyester film (BOPET), a cast polypropylene film (CPP), an aluminum foil (Al) and the like.
In a high temperature retort packaging material composite structure, because the retort treatment needs good heat resistance, a high melting point retort-grade cast polypropylene film (RCPP) with high crystallinity is widely used, and RCPP is generally hard and brittle, is particularly obvious under low temperature conditions, and has large temperature difference in winter, and sometimes the temperature is reduced to about-18 ℃, under the low temperature conditions, the common retort packaging material is brittle and the tear strength is poor due to low temperature. At the moment, a series of problems can occur in the high-temperature cooking packaging material, the packaging material cannot maintain the original performance, the packaging material is crisp, the mechanical property of the packaging material is greatly reduced, the packaging material is cracked and cracked, the packaging material is easily broken by extrusion of products in the transportation and stacking processes, the sealing performance of the packaging material is damaged, and the packaged contents cannot be correspondingly protected.
Disclosure of Invention
In order to solve the technical problems, the invention provides a cold-resistant tear-resistant high-temperature cooking packaging material.
In order to realize the primary purpose of the invention, the invention adopts the following technical scheme:
a cold-resistant tear-resistant high-temperature cooking packaging material has a film layer structure comprising a biaxially oriented polyester film, an aluminum foil and a modified polypropylene film in sequence; the modified polypropylene film comprises a corona layer, a middle layer and a heat sealing layer, wherein the corona layer is composed of ternary random copolymer polypropylene, the middle layer is composed of random copolymer polypropylene and hydrogenated styrene-butadiene block copolymer in a mass ratio of (83-87): (13-17), and the heat sealing layer is composed of ternary random copolymer polypropylene, hydrogenated styrene-butadiene block copolymer, slipping agent, open master batch and processing aid in a mass ratio of (93-97): (4-6): 0.8-1.2): 0.1-0.3.
The further technical scheme is as follows: the thicknesses of the corona layer, the middle layer and the heat sealing layer are 15 microns, 60 microns and 15 microns in sequence.
The further technical scheme is as follows: the grade information of the ternary random copolymerization polypropylene is RF401, the grade information of the random copolymerization polypropylene is F800E, the grade information of the hydrogenated styrene-butadiene block copolymer is G1657, the grade information of the slipping agent is 10090-K, the grade information of the open-ended master batch is AB20LD, and the grade information of the processing aid is 100991-K.
The invention also provides a preparation method of the cold-resistant tear-resistant high-temperature cooking packaging material, which comprises the following steps:
step 1, preparing the modified polypropylene film by sequentially carrying out an extrusion process, a casting cooling and setting process, a thickness measuring process, a deflection process, a corona process and an edge cutting and winding process on the ingredients of the corona layer, the intermediate layer and the heat sealing layer;
the extrusion process adopts three-section heating, wherein the first-section temperature is 220 +/-5 ℃, the second-section temperature is 255 +/-5 ℃, the third-section temperature is 250 +/-5 ℃ and the die head temperature is 240 +/-5 ℃;
in the casting cooling and shaping process, a casting roller rapidly cools and shapes a hot melt film under the action of an air knife and a vacuum box, and the roll surface temperature of the casting roller is set to be 15 +/-2 ℃, the upper position and the lower position of the air knife are 90 +/-2%, the speed of the air knife is 55 +/-2%, the wind speed of the vacuum box is 30 +/-2%, and the horizontal position of the air knife is 45 +/-2%; the air knife pressure is 5 +/-0.5 mbar; the pressure of the vacuum box is 1 +/-0.5 mbar;
in the corona procedure, the corona treatment power is set to be 8 +/-1 KW, and the corona roller pressure is set to be 3 +/-1 bar;
and 2, carrying out dry compounding on the biaxially oriented polyester film compounded with the aluminum foil and the modified polypropylene film.
The invention has the beneficial effects that:
according to the invention, the formula of the traditional polypropylene film is improved, and the hydrogenated styrene-butadiene block copolymer is added into the formula, so that the packaging material meets the requirement of high-temperature cooking resistance, namely, the packaging material has stable heat resistance, is cooked at 121 ℃ for 40 minutes, has stable performance and dimension, does not deform or delaminate, does not crack at a heat-sealing position, and has good quality-keeping, fresh-keeping and odor-keeping effects; meanwhile, the packaging material has excellent low-temperature resistance, namely, the packaging material still can keep stable performance under the low-temperature environment of about 18 ℃ below zero, indexes such as tear strength, impact strength, heat sealing strength and the like do not change obviously, and good packaging adaptability under the low-temperature condition is ensured.
Drawings
FIG. 1 is a flow chart of the preparation method of the present invention.
Detailed Description
The technical scheme of the invention is more specifically explained by combining the following embodiments:
the sources of the raw materials in the following examples are shown in the following table:
raw materials Number plate information Manufacturer information
Ternary random copolymerized polypropylene RF401 Korea
Random copolymerized polypropylene F800E Ashore stoning
Hydrogenated styrene-butadiene block copolymers G1657 American Keteng
Slipping agent 10090-K Safety color matching
Open-ended masterbatch AB20LD Beijing Yalun
Processing aid 100991-K Safety color matching
Example 1
The preparation method of the cold-resistant tear-resistant high-temperature cooking packaging material comprises the following steps:
step 1, preparing the modified polypropylene film by sequentially carrying out an extrusion process, a casting cooling and setting process, a thickness measuring process, a deflection process, a corona process and an edge cutting and winding process on the ingredients of the corona layer, the intermediate layer and the heat sealing layer;
the corona layer is made of ternary random copolymer polypropylene, the middle layer is made of random copolymer polypropylene and hydrogenated styrene-butadiene block copolymer in a mass ratio of 85:15, and the heat sealing layer is made of ternary random copolymer polypropylene, hydrogenated styrene-butadiene block copolymer, slipping agent, opening master batch and processing aid in a mass ratio of 95:5:1:1: 0.2;
the extrusion process adopts three-section heating, wherein the first-section temperature is 220 ℃, the second-section temperature is 255 ℃, the third-section temperature is 250 ℃ and the die head temperature is 240 ℃;
in the casting cooling and shaping process, a casting roller rapidly cools and shapes a hot melt film under the action of an air knife and a vacuum box, and the roll surface temperature of the casting roller is set to be 15 ℃, the upper position and the lower position of the air knife are set to be 90%, the air knife speed is set to be 55%, the air speed of the vacuum box is set to be 30%, and the horizontal position of the air knife is set to be 45%; the air knife pressure is 5 mbar; the pressure of the vacuum box is 1 mbar;
in the corona procedure, the corona treatment power is set to be 8KW, and the corona roller pressure is set to be 3 bar;
the thicknesses of the corona layer, the middle layer and the heat sealing layer in the modified polypropylene film are 15 micrometers, 60 micrometers and 15 micrometers in sequence.
And 2, carrying out dry compounding on the biaxially oriented polyester film (BOPET) compounded with the aluminum foil (Al) and the modified polypropylene film.
Example 2
The preparation method of the cold-resistant tear-resistant high-temperature cooking packaging material comprises the following steps:
step 1, preparing the modified polypropylene film by sequentially carrying out an extrusion process, a casting cooling and setting process, a thickness measuring process, a deflection process, a corona process and an edge cutting and winding process on the ingredients of the corona layer, the intermediate layer and the heat sealing layer;
the corona layer is made of ternary random copolymer polypropylene, the middle layer is made of random copolymer polypropylene and hydrogenated styrene-butadiene block copolymer in a mass ratio of 83:17, and the heat sealing layer is made of ternary random copolymer polypropylene, hydrogenated styrene-butadiene block copolymer, slipping agent, opening master batch and processing aid in a mass ratio of 93:4:1.2:1.2: 0.3;
the extrusion process adopts three-section heating, wherein the first-section temperature is 215 ℃, the second-section temperature is 250 ℃, the third-section temperature is 245 ℃ and the die head temperature is 235 ℃;
in the casting cooling and shaping process, a casting roller rapidly cools and shapes a hot melt film under the action of an air knife and a vacuum box, and the roll surface temperature of the casting roller is set to be 13 ℃, the upper position and the lower position of the air knife are 88%, the air knife speed is 53%, the air speed of the vacuum box is 28%, and the horizontal position of the air knife is 43%; the air knife pressure is 4.5 mbar; the vacuum box pressure is 0.5 mbar;
in the corona procedure, the corona treatment power is 7KW, and the corona roller pressure is 2 bar;
the thicknesses of the corona layer, the middle layer and the heat sealing layer in the modified polypropylene film are 15 micrometers, 60 micrometers and 15 micrometers in sequence.
And 2, carrying out dry compounding on the biaxially oriented polyester film (BOPET) compounded with the aluminum foil (Al) and the modified polypropylene film.
Example 3
The preparation method of the cold-resistant tear-resistant high-temperature cooking packaging material comprises the following steps:
step 1, preparing the modified polypropylene film by sequentially carrying out an extrusion process, a casting cooling and setting process, a thickness measuring process, a deflection process, a corona process and an edge cutting and winding process on the ingredients of the corona layer, the intermediate layer and the heat sealing layer;
the corona layer is made of ternary random copolymer polypropylene, the middle layer is made of random copolymer polypropylene and hydrogenated styrene-butadiene block copolymer in a mass ratio of 87:13, and the heat sealing layer is made of ternary random copolymer polypropylene, hydrogenated styrene-butadiene block copolymer, slipping agent, opening master batch and processing aid in a mass ratio of 97:6:0.8:0.8: 0.1;
the extrusion process adopts three-section heating, wherein the first-section temperature is 225 ℃, the second-section temperature is 260 ℃, the third-section temperature is 255 ℃ and the die head temperature is 245 ℃;
in the casting cooling and shaping process, a casting roller rapidly cools and shapes a hot melt film under the action of an air knife and a vacuum box, and the roll surface temperature of the casting roller is set to be 17 ℃, the upper position and the lower position of the air knife are set to be 92%, the air knife speed is set to be 57%, the air speed of the vacuum box is set to be 32%, and the horizontal position of the air knife is set to be 47%; the air knife pressure is 5.5 mbar; the vacuum box pressure is 1.5 mbar;
in the corona procedure, the corona treatment power is set to be 9KW, and the corona roller pressure is set to be 4 bar;
the thicknesses of the corona layer, the middle layer and the heat sealing layer in the modified polypropylene film are 15 micrometers, 60 micrometers and 15 micrometers in sequence.
And 2, carrying out dry compounding on the biaxially oriented polyester film (BOPET) compounded with the aluminum foil (Al) and the modified polypropylene film.
The properties of the high temperature retort packaging material prepared in the above example are as follows:
performance of Example 1 Example 2 Example 3 Traditional packaging material
Force of breaking (N) 122 115 126 68
Elongation at Break (%) 84 82 87 36
Heat sealing Strength (N/15mm) 90 88 91 68

Claims (2)

1. The utility model provides a cold-resistant tear-resistant high temperature cooking packaging material which characterized in that: the film layer structure of the packaging material is sequentially a biaxial tension polyester film, an aluminum foil and a modified polypropylene film; the modified polypropylene film comprises a corona layer, a middle layer and a heat sealing layer, wherein the corona layer is composed of ternary random copolymer polypropylene, the middle layer is composed of random copolymer polypropylene and hydrogenated styrene-butadiene block copolymer with the mass ratio of (83-87): (13-17), and the heat sealing layer is composed of ternary random copolymer polypropylene, hydrogenated styrene-butadiene block copolymer, slipping agent, open master batch and processing aid with the mass ratio of (93-97): (4-6): 0.8-1.2: 0.1-0.3;
the thicknesses of the corona layer, the middle layer and the heat sealing layer are 15 microns, 60 microns and 15 microns in sequence;
the grade information of the ternary random copolymerization polypropylene is RF401, the grade information of the random copolymerization polypropylene is F800E, the grade information of the hydrogenated styrene-butadiene block copolymer is G1657, the grade information of the slipping agent is 10090-K, the grade information of the open-ended master batch is AB20LD, and the grade information of the processing aid is 100991-K.
2. A method for preparing the cold-resistant tear-resistant high-temperature retort packaging material as claimed in claim 1, which comprises the following steps:
step 1, preparing the modified polypropylene film by sequentially carrying out an extrusion process, a casting cooling and setting process, a thickness measuring process, a deflection process, a corona process and an edge cutting and winding process on the ingredients of the corona layer, the intermediate layer and the heat sealing layer;
the extrusion process adopts three-section heating, wherein the first-section temperature is 220 +/-5 ℃, the second-section temperature is 255 +/-5 ℃, the third-section temperature is 250 +/-5 ℃ and the die head temperature is 240 +/-5 ℃;
in the casting cooling and shaping process, a casting roller rapidly cools and shapes a hot melt film under the action of an air knife and a vacuum box, and the roll surface temperature of the casting roller is set to be 15 +/-2 ℃, the upper position and the lower position of the air knife are 90 +/-2%, the speed of the air knife is 55 +/-2%, the wind speed of the vacuum box is 30 +/-2%, and the horizontal position of the air knife is 45 +/-2%; the air knife pressure is 5 +/-0.5 mbar; the pressure of the vacuum box is 1 +/-0.5 mbar;
in the corona procedure, the corona treatment power is set to be 8 +/-1 KW, and the corona roller pressure is set to be 3 +/-1 bar;
and 2, carrying out dry compounding on the biaxially oriented polyester film compounded with the aluminum foil and the modified polypropylene film.
CN201910292374.8A 2019-04-12 2019-04-12 Cold-resistant tear-resistant high-temperature cooking packaging material and preparation method thereof Active CN110065284B (en)

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CN103231567B (en) * 2013-04-19 2016-05-11 黄山永新股份有限公司 Be used for RCPP film of packing and preparation method thereof
KR101738768B1 (en) * 2015-09-07 2017-05-22 롯데케미칼 주식회사 Polypropylene resin composition with excellent adhesive properties and multilayer film
CN105778296B (en) * 2016-03-17 2018-11-20 海南联塑科技实业有限公司 A kind of cold-resistant PP-R pipe and preparation method thereof
CN106827748B (en) * 2016-12-21 2018-08-24 安徽双津实业有限公司 A kind of flexibility boiling film
CN206826068U (en) * 2017-05-17 2018-01-02 郑州宝蓝包装技术有限公司 A kind of packaging film of ultra-soft digestion resistant and packaging bag
CN107538837A (en) * 2017-06-29 2018-01-05 江阴宝柏包装有限公司 The composite membrane of retort packaging bag and the method for preparing its RCPP layer
CN109532175A (en) * 2018-12-28 2019-03-29 大连盛林薄膜新材料有限公司 A kind of half boiling film of oxygen absorption type cast polypropylene

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