CN112937042A - Composite membrane, manufacturing method and application - Google Patents

Composite membrane, manufacturing method and application Download PDF

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Publication number
CN112937042A
CN112937042A CN202110304239.8A CN202110304239A CN112937042A CN 112937042 A CN112937042 A CN 112937042A CN 202110304239 A CN202110304239 A CN 202110304239A CN 112937042 A CN112937042 A CN 112937042A
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composite
film
composite film
compounding
adhesive
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Chinese (zh)
Inventor
戴竟成
高文锦
江学志
徐祺
赵阳
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Shanghai Relief Printing Co ltd
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Shanghai Relief Printing 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
    • B32B37/003—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid air inclusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2307/302—Conductive
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • 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
    • B32B2439/00—Containers; Receptacles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Laminated Bodies (AREA)

Abstract

The application discloses a composite membrane, a manufacturing method and application, wherein the manufacturing method comprises the following steps: compounding a biaxially oriented polyamide film on the surface of the silicon-plated polyethylene glycol terephthalate film; curing treatment; compounding aluminum-plated ethylene and vinyl alcohol copolymer on the surface of the biaxially oriented polyamide film; compounding linear low-density polyethylene on the surface of the aluminum-plated ethylene and vinyl alcohol copolymer; and standing at normal temperature for a period of time, and performing aging treatment to obtain the composite membrane. The composite membrane is prepared by the preparation method. The composite film has excellent barrier property, can protect the content, has excellent bending resistance, is convenient for processing plates, effectively avoids heat transfer caused by air convection, greatly reduces the heat conductivity coefficient, has certain environmental protection property, accords with ROHS instruction due to no toxic and harmful substances, and has the properties of environmental protection, high efficiency and energy saving.

Description

Composite membrane, manufacturing method and application
Technical Field
The application belongs to the technical field of composite membranes, and particularly relates to a composite membrane, a manufacturing method and application.
Background
The existing composite membrane has the defects of complex manufacturing method, poor folding resistance and low yield, and the manufacturing cost is high, so that the mass operation is difficult to realize to meet the huge market use requirement; moreover, the existing composite film product is generally limited in performance, such as poor barrier performance, high thermal conductivity with an aluminum foil layer (thermal bridge heat conduction), and the composite film material itself is not environment-friendly, so that finding a composite film with a simpler manufacturing method, a more environment-friendly product, and more excellent performance, a manufacturing method, and an application thereof is a technical problem to be solved urgently.
Disclosure of Invention
In view of the above disadvantages, the present disclosure provides a composite film, a method for making the composite film, and an application of the composite film.
In order to solve the technical problem, the application is realized by the following technical scheme:
the application provides a method for manufacturing a composite film on one hand, which comprises the following steps:
compounding a biaxially oriented polyamide film (NY) on the surface of a silicon-plated polyethylene terephthalate film (oxidized PET);
curing treatment;
compounding aluminum-plated ethylene-vinyl alcohol copolymer (VMEVOH) on the surface of the biaxially oriented polyamide film (NY);
compounding Linear Low Density Polyethylene (LLDPE) on the surface of the aluminum-plated ethylene-vinyl alcohol copolymer (VMEVOH);
and standing at normal temperature for a period of time, and performing aging treatment to obtain the composite membrane.
Further, the above method for manufacturing a composite film, wherein the silicon-plated polyethylene terephthalate film and the biaxially oriented polyamide film are laminated with an adhesive; compounding the biaxially oriented polyamide film and the aluminized ethylene and vinyl alcohol copolymer through an adhesive; and compounding the aluminized ethylene & vinyl alcohol copolymer and the linear low-density polyethylene by an adhesive.
Further, in the method for manufacturing the composite film, the composite strength between the silicon-plated polyethylene terephthalate film and the biaxially oriented polyamide film is 4.3N to 4.5N; the composite strength between the biaxially oriented polyamide film and the aluminized ethylene and vinyl alcohol copolymer is 3.8N-4.5N; the composite strength between the aluminized ethylene and vinyl alcohol copolymer and the linear low-density polyethylene is 6.4N-7.1N.
Further, in the method for manufacturing the composite film, the composite concentration of the adhesive is 63% to 67%.
Further, in the method for manufacturing a composite film, the adhesive includes: the adhesive comprises a main agent, a curing agent and ethyl acetate, wherein the ratio of the main agent to the curing agent to the ethyl acetate is 8.5: 1: 11.6-9.5: 1: 12.8.
further, in the above method for producing a composite film, the amount of the binder to be applied is 3g/m2～4.4g/m2。
Further, in the method for manufacturing a composite film, the curing process includes: curing at 47-53 deg.C for 2 days.
Further, in the method for manufacturing a composite film, the normal temperature treatment includes: the treatment is carried out for 2 days at normal temperature.
Further, the method for manufacturing the composite film further comprises: aging for 3 days at 37-43 ℃.
The application also provides a composite film which is prepared by adopting the preparation method.
The application also provides an application of the composite membrane.
Compared with the prior art, the method has the following technical effects:
the composite film manufactured by the method has smooth surface, no bubbles and no folds, the puncture strength of the composite film from the surface to the inside along the MD and TD directions can reach 26N-28N, the puncture strength of the composite film from the inside to the surface along the MD and TD directions can reach 26N-28N, and the puncture strength is high; the tensile property of the composite film along the MD and TD directions can reach 113N-120N, the composite strength between two adjacent layers of films can reach 3.5N-7.1N, the sealing strength of the composite film can reach 58N-61N, and the water vapor transmittance of the composite film is 0.01-0.05 g/(m) m224H), having an oxygen transmission rate of 0.01 to 0.05 cc/(m)224 H.0.1 MPa). Wherein, MD direction is the product processing direction, and TD direction is perpendicular to MD direction.
The composite film has excellent barrier property and barrier property, and can protect the content; the material has excellent bending resistance, and is convenient for processing plates; the composite film effectively avoids heat transfer caused by air convection, so that the heat conductivity coefficient is greatly reduced, the composite film also has certain environmental protection property, conforms to ROHS instruction due to no toxic and harmful substances, has the performance of environmental protection, high efficiency and energy saving, and becomes one of the most advanced high-efficiency heat insulation materials in the world, and the outer package material of the vacuum heat insulation material plays a key role in the overall guarantee. The composite film can be used for manufacturing a packaging composite film for a novel high-end vacuum insulation panel, is a vacuum insulation material, and is formed by filling a core material inside and covering a vacuum protection surface layer outside.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: a flow chart of a method for manufacturing a composite film according to an embodiment of the application;
FIG. 2: the structure of a composite membrane according to an embodiment of the present application is schematically illustrated.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In one embodiment of the present application, as shown in fig. 1, a method for making a composite film includes:
compounding a biaxially oriented polyamide film 3 on the surface of a silicon-plated polyethylene terephthalate film 1;
step two, curing treatment;
compounding aluminum-plated ethylene and vinyl alcohol copolymer 5 on the surface of the biaxially oriented polyamide film 3;
compounding linear low-density polyethylene 7 on the surface of the aluminized ethylene and vinyl alcohol copolymer 5;
and step five, standing for a period of time at normal temperature, and performing aging treatment to obtain the composite membrane.
In the first step: the silicon-plated polyethylene terephthalate film 1 and the biaxially oriented polyamide film 3 are compounded through an adhesive 2.
In the second step, the aging process includes: curing at 47-53 deg.C for 2 days. In this embodiment, the curing treatment is performed to improve the water leveling property of the adhesive 2, to complete the reaction, and to reduce the generation of bubbles. However, in this example, in order to sufficiently volatilize the water in the oxidized PET/NY, the generation of interlayer bubbles was reduced in the case of 2 dry (since the material contains water, 2 dry reacts with the binder 2 to form carbon dioxide and form bubbles).
Wherein the above-mentioned aging treatment temperature may be 47 deg.C, 48 deg.C, 49 deg.C, 50 deg.C, 51 deg.C, 52 deg.C or 53 deg.C.
In the third step, the biaxially oriented polyamide film 3 and the aluminized ethylene/vinyl alcohol copolymer 5 are laminated with an adhesive 2.
In the fourth step, the aluminized ethylene & vinyl alcohol copolymer 5 and the linear low density polyethylene 7 are compounded by the adhesive 2.
In the compounding process using the adhesive 2 according to the first step, the third step and the fourth step, the adhesive 2 includes: the adhesive comprises a main agent, a curing agent and ethyl acetate, wherein the ratio of the main agent to the curing agent to the ethyl acetate is 8.5: 1: 11.6-9.5: 1: 12.8.
further, the composite concentration of the adhesive 2 is 63% -67%.
Further, the coating weight of the adhesive 2 is 3g/m2～4.4g/m2. Wherein the range of the amount of the adhesive 2 to be applied is influenced by the depth of the cells of the gumming roller, for example, set to 3g/m2The coating weight of (2) is selected to be 3g/m2The coating roll of (1). The coating weight of the current mainstream VIP manufacturers on the market is usually 2.5g/m2In this embodiment, the coating weight is increased to 3g/m according to the requirement of puncture resistance2～4.4g/m2In the meantime.
In the embodiment, the composite strength between the silicon-plated polyethylene terephthalate film 1 and the biaxially oriented polyamide film 3 is 4.3N to 4.5N; the composite strength between the biaxially oriented polyamide film 3 and the aluminized ethylene/vinyl alcohol copolymer 5 is 3.8N; the composite strength between the aluminized ethylene-vinyl alcohol copolymer 5 and the linear low-density polyethylene 7 is 6.4N-7.1N.
The tensile property of the composite film in the MD and TD directions can reach 113N-120N, the composite strength between two adjacent layers of films can reach 3.5N-7.1N, the sealing strength of the composite film can reach 58N-61N, and the water vapor transmission rate is 0.01-0.05 g/(m) m224H), having an oxygen transmission rate of 0.01 to 0.05 cc/(m)2·24H·0.1Mpa)。
Wherein the water vapor permeability is 0.01-0.05 g/(m)224H) shows that the composite film of the present example has excellent performance of preventing evaporation of moisture, which can effectively prevent drying of the contents and loss of moisture. The oxygen transmission rate is 0.01-0.05 cc/(m)224H 0.1Mpa) indicates that the composite film of this example has excellent flex resistance, which maintains barrier properties after repeated flexing.
In the fifth step, the method further includes: the normal temperature treatment is carried out for 2 days, wherein the coating weight is higher, the solid content of the adhesive 2 is relatively higher, the curing time of the coiled film is relatively longer, the LLDPE sealing layer is easy to shrink in a high-temperature environment for a long time to form obvious appearance wrinkle abnormity, the normal temperature treatment is carried out for 2 days, the wrinkle occurrence is reduced, and the surface flatness and smoothness of the composite film are improved.
Wherein, in the fifth step, the aging treatment is carried out for 3 days at 37-43 ℃, in order to enable the adhesive 2 to react and strengthen the adhesion between the film layers. Alternatively, aging treatment at 37 ℃ for 3 days is possible; can be aged for 3 days at 38 ℃; can be aged for 3 days at 38 ℃; aging at 39 deg.C for 3 days; aging at 40 deg.C for 3 days; aging at 41 deg.C for 3 days; aging at 42 deg.C for 3 days; it can be aged at 43 deg.C for 3 days.
As shown in fig. 2, another embodiment of the present application further provides a composite film, which is manufactured by the above manufacturing method.
The technical features of the manufacturing method are described above, and are not described herein again.
The composite film prepared by the embodiment has excellent barrier property, and can protect the content. The steel plate has excellent bending resistance and is convenient for plate processing; the composite film effectively avoids heat transfer caused by air convection, so that the heat conductivity coefficient is greatly reduced, the composite film also has certain environmental protection property, conforms to ROHS instruction due to no toxic and harmful substances, has the performance of environmental protection, high efficiency and energy saving, and becomes one of the most advanced high-efficiency heat insulation materials in the world, and the outer package material of the vacuum heat insulation material plays a key role in the overall guarantee.
In the embodiment of the application, the application of the composite membrane is also provided.
This embodiment complex film can be used to make high-end novel vacuum insulation panels and uses the packing complex film, is one kind of vacuum insulation material, is by inside filling core, covers the vacuum protection top layer outward and forms.
The performance index of the present application is further explained by experimental data below.
Figure BDA0002987456270000061
The process parameters involved in the manufacturing process of the embodiment are as follows:
example a 1: the compounding temperature is 55 ℃, the compounding pressure is 0.1MPa, the running linear velocity is 80m/min, and the drying temperature is 55 ℃. The adhesive 2 comprises the following components in percentage by weight: a main agent: curing agent: the mixture was adjusted to 8.5: 1: 11.6 ethyl acetate, working concentration was 63%, and coating weight of adhesive 2 was adjusted to 3g/m2After the oxidized PET/NY 1 is dried and compounded, the PET/NY/VMEVOH2 is aged and treated for 2 days at 50 ℃, after the oxidized PET/NY/VMEVOH2 is dried and compounded, the oxidized PET/NY/VMEVOH/LLDPE 3 is continuously dried and compounded, and finally, the composite film is prepared after 2 days at normal temperature and 3 days of aging treatment at 40 ℃.
Comparative example a 1: the compounding temperature is 55 ℃, the compounding pressure is 0.1MPa, the running linear velocity is 80m/min, and the drying temperature is 55 ℃. The adhesive 2 comprises the following components in percentage by weight: a main agent: curing agent: the mixture was adjusted to a working concentration of 56% and a coating weight of adhesive 2 was adjusted to 3g/m by mixing ethyl acetate at 9.5: 1: 12.82After the oxidized PET/NY 1 is dried and compounded, the PET/NY/VMEVOH2 is aged and treated for 2 days at 50 ℃, after the oxidized PET/NY/VMEVOH2 is dried and compounded, the oxidized PET/NY/VMEVOH/LLDPE 3 is continuously dried and compounded, and finally, the composite film is prepared after 2 days at normal temperature and 3 days of aging treatment at 40 ℃.
Comparative example a 2: the compounding temperature is 55 ℃, the compounding pressure is 0.1MPa, the running linear velocity is 80m/min, and the drying temperature is 55 ℃. The adhesive 2 comprises the following components in percentage by weight: a main agent: curing agent: the mixture was adjusted to 8.5: 1: 11.6 ethyl acetate, working concentration was 63%, and coating weight of adhesive 2 was adjusted to 2.5g/m2After the oxidized PET/NY 1 is dried and compounded, the PET/NY/VMEVOH is aged at 50 ℃ for 2 days, after the oxidized PET/NY/VMEVOH2 is dried and compounded, the oxidized PET/NY/VMEVOH/LLDPE 3 is continuously dried and compounded, and finally, the composite film is prepared after 2 days at normal temperature and 3 days of aging treatment at 40 ℃.
The difference between the above example A1 and comparative example A1 is that the binder 2 used is different in each ratio and working concentration; the difference between the above example A1 and comparative example A2 is that the amount of adhesive 2 applied is different.
As can be seen from table 1 above, the composite films prepared in example a1 all had better properties than comparative examples a1 and a 2.
Example B1: the compounding temperature is 65 ℃, the compounding pressure is 0.5MPa, the running linear velocity is 130m/min, and the drying temperature is 65 ℃. The adhesive 2 comprises the following components in percentage by weight: a main agent: curing agent: the mixture was adjusted to a working concentration of 67% and a coating weight of adhesive 2 was adjusted to 3g/m by mixing ethyl acetate 8.5: 1: 11.62After the oxidized PET/NY 1 is dried and compounded, the PET/NY/VMEVOH2 is aged and treated for 2 days at 50 ℃, after the oxidized PET/NY/VMEVOH2 is dried and compounded, the oxidized PET/NY/VMEVOH/LLDPE 3 is continuously dried and compounded, and finally, the composite film is prepared after 2 days at normal temperature and 3 days of aging treatment at 40 ℃.
Comparative example B1: the compounding temperature is 65 ℃, the compounding pressure is 0.5MPa, the running linear velocity is 130m/min, and the drying temperature is 65 ℃. The adhesive 2 comprises the following components in percentage by weight: a main agent: curing agent: the mixture was adjusted to a working concentration of 67% and a coating weight of adhesive 2 was adjusted to 3g/m by mixing ethyl acetate 8.5: 1: 11.62After the oxidized PET/NY 1 is dried and recovered, the oxidized PET/NY/VMEVOH2 is dry-compounded without curing treatmentAnd then continuously oxidizing PET/NY/VMEVOH/LLDPE 3 for dry composite treatment, finally treating at normal temperature for 2 days, and carrying out aging treatment at 40 ℃ for 3 days to obtain the composite film.
Comparative example B2: the compounding temperature is 65 ℃, the compounding pressure is 0.5MPa, the running linear velocity is 130m/min, and the drying temperature is 65 ℃. The adhesive 2 comprises the following components in percentage by weight: a main agent: curing agent: the mixture was adjusted to a working concentration of 67% and a coating weight of adhesive 2 was adjusted to 3g/m by mixing ethyl acetate 8.5: 1: 11.62After the oxidized PET/NY 1 is dried and compounded, the PET/NY/VMEVOH is aged at 50 ℃ for 2 days, after the oxidized PET/NY/VMEVOH2 is dried and compounded, the oxidized PET/NY/VMEVOH/LLDPE 3 is continuously dried and compounded, and finally, the composite film is prepared after the aging treatment at 40 ℃ for 3 days without the normal temperature treatment.
Among them, the above example B1 is different from the comparative example B1 in that comparative example B1 is not subjected to aging treatment after 1 drying; the difference between the above-mentioned example B1 and comparative example B2 is that comparative example B2 was not treated at ambient temperature after 3 dry treatments and was aged at 40 ℃ for 3 days.
Similarly, as can be seen from table 1 above, the composite films prepared in example B1 each had better properties than comparative examples B1 and B2.
The composite film of the present application has excellent barrier properties, which can protect the contents. The steel plate has excellent bending resistance and is convenient for plate processing; the composite film effectively avoids heat transfer caused by air convection, so that the heat conductivity coefficient is greatly reduced, the composite film also has certain environmental protection property, conforms to ROHS instruction due to no toxic and harmful substances, has the performance of environmental protection, high efficiency and energy saving, and becomes one of the most advanced high-efficiency heat insulation materials in the world, and the outer package material of the vacuum heat insulation material plays a key role in the overall guarantee. The composite film can be used for manufacturing a packaging composite film for a novel high-end vacuum insulation panel, is a vacuum insulation material, and is formed by filling a core material inside and covering a vacuum protection surface layer outside.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.

Claims (11)

1. A method of making a composite film, comprising:
compounding a biaxially oriented polyamide film on the surface of the silicon-plated polyethylene glycol terephthalate film;
curing treatment;
compounding aluminum-plated ethylene and vinyl alcohol copolymer on the surface of the biaxially oriented polyamide film;
compounding linear low-density polyethylene on the surface of the aluminum-plated ethylene and vinyl alcohol copolymer;
and standing at normal temperature for a period of time, and performing aging treatment to obtain the composite membrane.
2. The method for manufacturing a composite film according to claim 1, wherein the silicon-plated polyethylene terephthalate film and the biaxially oriented polyamide film are laminated with an adhesive; compounding the biaxially oriented polyamide film and the aluminized ethylene and vinyl alcohol copolymer through an adhesive; and compounding the aluminized ethylene & vinyl alcohol copolymer and the linear low-density polyethylene by an adhesive.
3. The method for manufacturing a composite film according to claim 2, wherein the composite strength between the silicon-plated polyethylene terephthalate film and the biaxially oriented polyamide film is 4.3N to 4.5N; the composite strength between the biaxially oriented polyamide film and the aluminized ethylene and vinyl alcohol copolymer is 3.8N-4.5N; the composite strength between the aluminized ethylene and vinyl alcohol copolymer and the linear low-density polyethylene is 6.4N-7.1N.
4. A method of making a composite film according to claim 2 wherein the binder is present at a combined concentration of 63% to 67%.
5. A method of making a composite film according to claim 2 or 3 or 4 wherein said adhesive comprises: the adhesive comprises a main agent, a curing agent and ethyl acetate, wherein the ratio of the main agent to the curing agent to the ethyl acetate is 8.5: 1: 11.6-9.5: 1: 12.8.
6. a method of making a composite film according to claim 2, 3 or 4 wherein the adhesive is applied in an amount of 3g/m2～4.4g/m2。
7. A method of making a composite film according to any one of claims 1 to 4 wherein said curing process comprises: curing at 47-53 deg.C for 2 days.
8. A method for making a composite film according to any one of claims 1 to 4, wherein said ambient temperature treatment comprises: the treatment is carried out for 2 days at normal temperature.
9. A method of making a composite membrane according to any one of claims 1 to 4, further comprising: aging for 3 days at 37-43 ℃.
10. A composite film produced by the production method according to any one of claims 1 to 9.
11. Use of a composite film according to claim 10.
CN202110304239.8A 2021-03-22 2021-03-22 Composite membrane, manufacturing method and application Pending CN112937042A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201841720U (en) * 2010-10-12 2011-05-25 浙江长海包装集团有限公司 High-barrier ceramic composite film
CN103009753A (en) * 2012-12-26 2013-04-03 郦国强 Polyethylene terephthalate (PET) extrusion composite material for sealing aseptic packages and preparation method thereof
CN103465578A (en) * 2013-07-26 2013-12-25 惠州宝柏包装有限公司 Composite film for packaging vacuum thermal insulation board and preparation method thereof
CN207291191U (en) * 2017-08-14 2018-05-01 惠州市道科包装材料有限公司 A kind of high-isolating packaging film of STP
CN108284655A (en) * 2017-12-29 2018-07-17 永新股份（黄山）包装有限公司 A kind of superinsulation is packed for laminated film and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201841720U (en) * 2010-10-12 2011-05-25 浙江长海包装集团有限公司 High-barrier ceramic composite film
CN103009753A (en) * 2012-12-26 2013-04-03 郦国强 Polyethylene terephthalate (PET) extrusion composite material for sealing aseptic packages and preparation method thereof
CN103465578A (en) * 2013-07-26 2013-12-25 惠州宝柏包装有限公司 Composite film for packaging vacuum thermal insulation board and preparation method thereof
CN207291191U (en) * 2017-08-14 2018-05-01 惠州市道科包装材料有限公司 A kind of high-isolating packaging film of STP
CN108284655A (en) * 2017-12-29 2018-07-17 永新股份（黄山）包装有限公司 A kind of superinsulation is packed for laminated film and preparation method thereof

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