CN110328933B - Easily-uncovered aluminum plastic cover film for cosmetic cover ring, production process and application - Google Patents

Easily-uncovered aluminum plastic cover film for cosmetic cover ring, production process and application Download PDF

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Publication number
CN110328933B
CN110328933B CN201910683406.7A CN201910683406A CN110328933B CN 110328933 B CN110328933 B CN 110328933B CN 201910683406 A CN201910683406 A CN 201910683406A CN 110328933 B CN110328933 B CN 110328933B
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layer
film
easy
aluminum foil
aluminum
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CN110328933A (en
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周婷
梁昌盛
晁承鹏
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Jiangyi Suda Huicheng Composite Material Co ltd
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Jiangyi Suda Huicheng Composite Material 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
    • B32B27/32—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
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • 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
    • B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
    • B32B43/003—Cutting
    • 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
    • B32B7/08—Interconnection of layers by mechanical means
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The application relates to an easy-to-uncover aluminum plastic cover film for a cosmetic cover ring, which comprises an outer layer, an aluminum foil layer and a heat sealing layer, wherein the outer layer and the heat sealing layer are respectively arranged on the upper side surface and the lower side surface of the aluminum foil layer, the outer layer is connected with the aluminum foil layer and the heat sealing layer through an adhesive, the outer layer is a PET film layer with the thickness of 6-30 mu m, the aluminum foil layer is an O-shaped aluminum foil with the thickness of 6-50 mu m, the heat sealing layer is a PE film layer with the thickness of 30-50 mu m, and the PE film layer consists of 50-90wt% of ethylene-propylene copolymer elastomer and 10-50wt% of PE. The application also relates to a production process and application of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring. The easy-to-uncovering type aluminum plastic cover film for the cosmetic cover ring has low heat sealing temperature when being heat-sealed with the PP or PE cover ring, high heat sealing strength and good heat sealing uniformity, and is not easy to open when being impacted by certain air pressure when being sealed with other packages after the cosmetic cover ring is compounded with the easy-to-uncovering type aluminum plastic cover film.

Description

Easily-uncovered aluminum plastic cover film for cosmetic cover ring, production process and application
Technical Field
The application relates to the technical field of composite packaging films, in particular to an easy-to-uncover aluminum plastic cover film for a cosmetic cover ring, a production process and application thereof.
Background
Because plastic products are light in weight and high in plasticity, plastic bottles are mostly adopted as accommodating vessels in the field of cosmetic packaging. For cosmetics with larger cream oil, polyethylene or polypropylene plastic bottles are mostly adopted, and in order to avoid the oxidation of active ingredients in the cream cosmetics, the plastic bottles are usually sealed in a packaging production link, and certain technical requirements on the sealing performance are met. At present, plastic-aluminum films are mostly adopted on the market to carry out film covering packaging on cream cosmetics, and the film covering is only in heat sealing with a cover ring during packaging, so that the requirement on the heat sealing performance of the film covering is higher, and particularly, the uniformity of bonding strength is high. When the heat-sealed cover ring is buckled at the bottle mouth of the cosmetic, certain pressure can be generated on the aluminum plastic cover film in the bottle, and if the combination strength of the cover film and the cover ring is uneven, the cosmetic is easy to leak, and the product quality is affected.
The Chinese patent document CN102700819A discloses an aluminum foil sealing film and a preparation method thereof, wherein the disclosed aluminum foil sealing film comprises a protective layer, a barrier layer and a heat sealing layer, the protective layer is a gloss oil layer or a PET film layer, the barrier layer is an aluminum foil layer, and the heat sealing layer consists of 15-25wt% of polybutene, 25-35wt% of ethylene-propylene copolymer and 40-60wt% of HDPE. The aluminum foil sealing film in the patent document has excellent easy-to-open and steaming-resistant performances when being used as the sealing film of the polypropylene plastic bottle, and greatly improves the use characteristics of the aluminum foil sealing film, but in the actual use process, the aluminum foil sealing film in the patent document is found to have uneven bonding strength.
The Chinese patent document CN105059707B discloses an aluminum foil sealing film and a preparation method thereof, wherein the disclosed aluminum foil sealing film comprises a protective layer, a barrier layer and a heat sealing layer which are sequentially compounded from top to bottom, the protective layer is a gloss oil layer or a PET film, the barrier layer is an aluminum foil layer, and the heat sealing layer consists of 15-25wt% of polybutene, 25-50wt% of metallocene LLDPE and 25-60wt% of HDPE. However, the aluminum foil sealing film in the patent document still has the problem of uneven bonding strength in the sealing process with the cover ring.
In view of the above, it is desirable to provide an easy-to-tear aluminum plastic cover film for use on cosmetic cover rings, which can improve the bonding force with a cover ring made of polyethylene or polypropylene base material, and can reduce the heat sealing temperature, and can simultaneously satisfy the heat sealing strength of a PP or PE base material.
Disclosure of Invention
The first aim of the application is to provide an easy-to-uncover aluminum plastic cover film for a cosmetic cover ring, and the second aim is to provide a production process of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring; a third object is to provide an application of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the packaging field. The easy-to-uncovering type aluminum plastic cover film for the cosmetic cover ring has the advantages of low heat sealing temperature when in heat sealing with the PP or PE cover ring, high heat sealing strength and good heat sealing uniformity, and is not easy to open when being impacted by certain air pressure when being sealed with other packages after the cosmetic cover ring is compounded with the easy-to-uncovering type aluminum plastic cover film.
In order to achieve the aim of the application, the easy-to-tear aluminum plastic cover film for the cosmetic cover ring comprises an outer layer, an aluminum foil layer and a heat sealing layer, wherein the outer layer and the heat sealing layer are respectively arranged on the upper side surface and the lower side surface of the aluminum foil layer, the outer layer is connected with the aluminum foil layer, the aluminum foil layer is connected with the heat sealing layer through an adhesive, and the easy-to-tear aluminum plastic cover film is characterized in that the outer layer is a PET film layer with the thickness of 6-30 mu m, the aluminum foil layer is an O-shaped aluminum foil with the thickness of 6-50 mu m, the heat sealing layer is a PE film layer with the thickness of 30-50 mu m, and the PE film layer consists of an ethylene-propylene copolymer elastomer with the thickness of 50-90wt% and PE with the thickness of 10-50 wt%. The adhesive is solvent polyurethane glue.
Preferably, the outer layer is a PET film layer with the thickness of 12 mu m, the aluminum foil layer is an O-state aluminum foil with the thickness of 50 mu m, and the heat sealing layer is a PE film layer with the thickness of 40 mu m.
Preferably, the mass ratio of the ethylene-propylene copolymer elastomer to PE is 80:20.
Preferably, the PE is LLDPE or/and LDPE.
Further, the PE is composed of 50 parts by weight of LLDPE and 50 parts by weight of LDPE, based on 100 parts by weight.
The ethylene-propylene copolymer elastomer is preferably selected from Dow chemical Nordel IP4570 and vistalon 6602 of Ekson Mobil company. The solvent type polyurethane glue provided by the application is glue containing urethane groups and isocyanate groups in molecular chains, and is preferably LH3721AB aluminum-plastic composite double-component adhesive of Jiangsu Lihe adhesive Co. The molecular weight of the PET according to the application is preferably 20000 to 30000.
Preferably, the heat sealing layer of the application is prepared by the following method: and (3) uniformly mixing the ethylene-propylene copolymer elastomer and PE in a mixer, and preparing a PE film by adopting a film blowing method to obtain the heat sealing layer.
The second object of the application is to provide a production process of an easy-to-uncover aluminum plastic cover film for a cosmetic cover ring.
The production process of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring comprises the following steps:
(A) Coating an adhesive on one side of an outer layer on a dry-method compounding machine, drying a solvent to obtain an outer adhesive layer, and pressing an aluminum foil layer by a compounding roller to obtain a compound aluminum foil layer;
(B) Coating adhesive on the aluminum foil surface of the composite aluminum foil layer again, drying the solvent to obtain an outer adhesive layer, enabling the outer adhesive layer to face the heat seal layer, and pressing through a composite roller to obtain a semi-finished product;
(C) And (C) curing the semi-finished product obtained in the step (B) for 48 hours at the temperature of 40 ℃ in a heat preservation room, and then performing die cutting to obtain the easy-to-uncover aluminum plastic cover film finished product for the cosmetic cover ring.
Preferably, the adhesive is applied in a thickness of 3-5 μm.
The application provides an application of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring in the packaging field.
A coating layer is arranged on the surface of the PET film of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring, and a printing layer is arranged on the surface of the coating layer.
Preferably, the coating is an acrylic resin paint, and the thickness of the coating is 0.5-2 mu m.
Compared with the prior art, the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring has the following advantages:
the aluminum plastic cover film prepared by the technical scheme has even binding force with the heat-sealed substrate and high binding strength, and is not easy to open when being impacted by certain air pressure when being sealed with other packages after the cosmetic cover ring is compounded with the easy-to-uncover aluminum plastic cover film, so that the leakage risk is greatly reduced; the heat-sealing temperature is lower than the conventional heat-sealing temperature, so that the process requirement of the aluminum plastic cover film in the process of compounding other matrixes is reduced, the molten deformation of the heat-sealed matrixes is avoided, the aluminum plastic cover film can still keep a good shape after heat sealing, and the aluminum plastic cover film can be widely applied to the heat-sealing packaging industry of PE and PP matrixes.
Drawings
FIG. 1 is a schematic view of a structure of an easily removable aluminum plastic cover film for a cosmetic cover ring according to the present application;
reference numerals:
1. an outer layer; 2. an aluminum foil layer; 3. a heat-sealing layer; 4. a coating; 5. and (5) printing a layer.
Detailed Description
The application is further described below with reference to the drawings and specific examples. The following examples are intended only to aid those skilled in the art in understanding the present application and are not intended to be limiting thereof.
Abbreviations used in the present application are as follows:
PET: polyethylene terephthalate;
PE: polyethylene;
LLDPE: linear low density polyethylene;
LDPE: low density polyethylene.
As shown in figure 1, the easy-to-tear aluminum plastic cover film for the cosmetic cover ring comprises an outer layer 1, an aluminum foil layer 2 and a heat sealing layer 3, wherein the outer layer 1 and the heat sealing layer 3 are respectively arranged on the upper side surface and the lower side surface of the aluminum foil layer 2, the outer layer 1 and the aluminum foil layer 2 are connected through an adhesive, the outer layer 1 is a PET film layer with the thickness of 6-30 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 6-50 mu m, the thickness of the heat sealing layer 3 is 30-50 mu m, and the adhesive is solvent polyurethane glue. The preferred PET film for use in the embodiments of the present application is a P ET film available from Hangzhou Dahua plastics Co., ltd. The aluminum foil layer 2 is preferably an O-state aluminum foil, and the aluminum foil used in the embodiment of the application is preferably any one of 8011 aluminum foil produced by Xiamen Xia aluminum foil limited company, 8021 aluminum foil produced by Zhongai aluminum foil limited company or 8079 aluminum foil produced by Henan Wan aluminum industry Co., ltd.
As a preferable mode of the application, the outer layer 1 is a PET film layer with the thickness of 12 mu m, the aluminum foil layer 2 is an O-state aluminum foil with the thickness of 50 mu m, and the heat sealing layer 3 is a PE film layer with the thickness of 40 mu m.
As a preferred embodiment of the present application, the heat-sealing layer 3 is composed of 50 to 90wt% of ethylene-propylene copolymer elastomer and 10 to 50wt% of PE. Further, the mass ratio of the ethylene-propylene copolymer elastomer to PE is 80:20.
As a preferable scheme of the application, the PE is at least one of LLDPE and LDPE. Further, the PE is composed of 50 parts by weight of LLDPE and 50 parts by weight of LDPE, based on 100 parts by weight. The ethylene-propylene copolymer elastomer, LLDPE and LDPE of the present application are all commercially available conventional choices. The ethylene-propylene copolymer elastomer used in the examples of the present application is preferably selected from the group consisting of Dow chemical noddel IP4570, vistalon 6602 from Ekksen Mobil; the LLDPE used in the embodiment of the application is 218W of the Saint basic industry company or 1802 of the China petrochemical, yangzi petrochemical, inc.; the LDPE used in the examples of the present application is preferably Q281 of China petrochemical Shanghai petrochemical Co., ltd or FB3000 of Korean LG chemistry. The solvent type polyurethane glue provided by the application is glue containing urethane groups and isocyanate groups in molecular chains, and is preferably LH3721AB aluminum-plastic composite double-component adhesive of Jiangsu Lihe adhesive Co. The molecular weight of the PET according to the application is preferably 20000 to 30000.
The preparation method of the heat-seal layer 3 in this embodiment is as follows:
and (3) uniformly mixing the ethylene-propylene copolymer elastomer and PE in a mixer, and preparing a PE film by adopting a film blowing method to obtain the heat sealing layer 3 required by the embodiment.
The production process of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring in the embodiment is as follows:
(A) Coating an adhesive on one side of an aluminum foil layer 2 on a dry-method compounding machine, drying a solvent to obtain an outer adhesive layer, and pressing the outer layer 1 by a compounding roller to obtain a compound aluminum foil layer 2;
(B) Coating adhesive on the aluminum foil surface of the composite aluminum foil layer 2 again, drying the solvent to obtain an outer adhesive layer, enabling the outer adhesive layer to face the heat sealing layer 3, and pressing through a composite roller to obtain a semi-finished product;
(C) And (C) curing the semi-finished product obtained in the step (B) for 48 hours at the temperature of 40 ℃ in a heat preservation room, and then performing die cutting to obtain the easy-to-uncover aluminum plastic cover film finished product for the cosmetic cover ring.
Preferably, wherein the adhesive of step (A) and step (B) is applied at a thickness of 3-5 μm.
Application of easy-to-uncover aluminum plastic cover film for cosmetic cover ring in packaging field: a coating layer 4 is arranged on the surface of the PET film, and a printing layer 5 is arranged on the surface of the coating layer 4.
Preferably, the coating layer 4 is an acrylic resin paint, and the thickness of the coating layer 4 is 0.5-2 μm.
The following examples are given as illustrative examples of the present application and are not to be construed as limiting the application, but merely as aiding one skilled in the art in understanding the application.
Example 1:
the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring comprises an outer layer 1, an aluminum foil layer 2 and a heat sealing layer 3, wherein the outer layer 1 and the heat sealing layer 3 are respectively arranged on the upper side surface and the lower side surface of the aluminum foil layer 2, the outer layer 1 and the aluminum foil layer 2 are connected through an adhesive, the outer layer 1 is a PET film layer with the thickness of 12 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 50 mu m, the thickness of the heat sealing layer 3 is 40 mu m, and the adhesive is solvent polyurethane glue.
In this embodiment, the PET film is a plastic industry limited company in Hangzhou Dahua; the aluminum foil layer 2 is O-shaped aluminum foil, and 8011 aluminum foil produced by Xiamen Xia aluminum foil limited company is selected.
The heat-seal layer 3 in this example consisted of 80wt% ethylene propylene copolymer elastomer and 20wt% PE, where PE consisted of L LDPE and HDPE, LLDPE was 50wt% and HDPE was 50wt% of the total PE mass.
The preparation method of the heat-seal layer 3 in this embodiment is as follows:
after 80 parts by weight of ethylene-propylene copolymer elastomer, 10 parts by weight of LLDPE and 10 parts by weight of HDPE were uniformly mixed in a mixer, a PE film having a thickness of 40 μm was prepared by a film blowing method, and the heat seal layer 3 required in this example was obtained.
The production process of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring in the embodiment is as follows:
(A) Coating an adhesive on one side of an aluminum foil layer 2 on a dry-method compounding machine, drying a solvent to obtain an outer adhesive layer, and pressing the outer layer 1 by a compounding roller to obtain a compound aluminum foil layer 2;
(B) Coating adhesive on the aluminum foil surface of the composite aluminum foil layer 2 again, drying the solvent to obtain an outer adhesive layer, enabling the outer adhesive layer to face the heat seal layer 35, and pressing through a composite roller to obtain a semi-finished product;
(C) And (C) curing the semi-finished product obtained in the step (B) for 48 hours at the temperature of 40 ℃ in a heat preservation room, and then performing die cutting to obtain the easy-to-uncover aluminum plastic cover film finished product for the cosmetic cover ring.
Wherein the adhesive of step (A) and step (B) has a coating thickness of 4 μm at the time of coating.
And (3) a layer of coating 4 can be arranged on the surface of the PET film of the finished product of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring, and when the cosmetic cover ring is used by a customer, relevant patterns can be printed on the surface of the coating 4 according to the needs, so that the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring with the printing layer 5 can be obtained. Wherein the coating layer 4 is an acrylic resin coating, and the thickness of the coating layer 4 is 0.5 mu m.
Example 2:
the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring comprises an outer layer 1, an aluminum foil layer 2 and a heat sealing layer 3, wherein the outer layer 1 and the heat sealing layer 3 are respectively arranged on the upper side surface and the lower side surface of the aluminum foil layer 2, the outer layer 1 and the aluminum foil layer 2 are connected through an adhesive, the outer layer 1 is a PET film layer with the thickness of 30 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 40 mu m, the thickness of the heat sealing layer 3 is 50 mu m, and the adhesive is solvent polyurethane glue.
In this embodiment, the PET film is a plastic industry limited company in Hangzhou Dahua; the aluminum foil layer 2 is O-shaped aluminum foil, and 8021 aluminum foil produced by medium aluminum foil limited company is selected.
The heat-seal layer 3 consists of 65wt% of ethylene-propylene copolymer elastomer and 35wt% of PE, the PE in this example consists of LLDPE and HDPE, wherein LLDPE comprises 50wt% of the total PE mass and HDPE comprises 50wt% of the total PE mass
The preparation method of the heat-seal layer 3 in this embodiment is as follows:
after 65 parts by weight of the ethylene-propylene copolymer elastomer, 17.5 parts by weight of LLDPE and 17.5 parts by weight of HDPE were uniformly mixed in a mixer, a PE film having a thickness of 50 μm was prepared by a film blowing method, and the heat-seal layer 3 required in this example was obtained.
The production process of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring in the embodiment is as follows:
(A) Coating an adhesive on one side of an aluminum foil layer 2 on a dry-method compounding machine, drying a solvent to obtain an outer adhesive layer, and pressing the outer layer 1 by a compounding roller to obtain a compound aluminum foil layer 2;
(B) Coating adhesive on the aluminum foil surface of the composite aluminum foil layer 2 again, drying the solvent to obtain an outer adhesive layer, enabling the outer adhesive layer to face the heat seal layer 35, and pressing through a composite roller to obtain a semi-finished product;
(C) And (C) curing the semi-finished product obtained in the step (B) for 48 hours at the temperature of 40 ℃ in a heat preservation room, and then performing die cutting to obtain the easy-to-uncover aluminum plastic cover film finished product for the cosmetic cover ring.
Wherein the adhesive of step (A) and step (B) has a coating thickness of 5 μm at the time of coating.
And (3) a layer of coating 4 can be arranged on the surface of the PET film of the finished product of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring, and when the cosmetic cover ring is used by a customer, relevant patterns can be printed on the surface of the coating 4 according to the needs, so that the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring with the printing layer 5 can be obtained. Wherein the coating layer 4 is an acrylic resin coating, and the thickness of the coating layer 4 is 0.5 mu m.
Example 3:
the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring comprises an outer layer 1, an aluminum foil layer 2 and a heat sealing layer 3, wherein the outer layer 1 and the heat sealing layer 3 are respectively arranged on the upper side surface and the lower side surface of the aluminum foil layer 2, the outer layer 1 and the aluminum foil layer 2 are connected through an adhesive, the outer layer 1 is a PET film layer with the thickness of 25 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 30 mu m, the thickness of the heat sealing layer 3 is 40 mu m, and the adhesive is solvent polyurethane glue.
In this embodiment, the PET film is a plastic industry limited company in Hangzhou Dahua; the aluminum foil layer 2 is O-shaped aluminum foil, and 8079 aluminum foil produced by Henan Mo Ji aluminum industry Co., ltd is selected;
the heat-seal layer 3 consists of 50wt% of ethylene-propylene copolymer elastomer and 50wt% of PE, the PE in this example consisting of LLDPE and HDPE, wherein LLDPE comprises 25wt% of the total PE mass and HDPE comprises 25wt% of the total PE mass.
The preparation method of the heat-seal layer 3 in this embodiment is as follows:
after 50 parts by weight of ethylene-propylene copolymer elastomer, 25 parts by weight of LLDPE and 25 parts by weight of HDPE were uniformly mixed in a mixer, a PE film having a thickness of 40 μm was prepared by a film blowing method, and the heat seal layer 3 required in this example was obtained.
The production process of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring in the embodiment is as follows:
(A) Coating an adhesive on one side of an aluminum foil layer 2 on a dry-method compounding machine, drying a solvent to obtain an outer adhesive layer, and pressing the outer layer 1 by a compounding roller to obtain a compound aluminum foil layer 2;
(B) Coating adhesive on the aluminum foil surface of the composite aluminum foil layer 2 again, drying the solvent to obtain an outer adhesive layer, enabling the outer adhesive layer to face the heat seal layer 35, and pressing through a composite roller to obtain a semi-finished product;
(C) And (C) curing the semi-finished product obtained in the step (B) for 48 hours at the temperature of 40 ℃ in a heat preservation room, and then performing die cutting to obtain the easy-to-uncover aluminum plastic cover film finished product for the cosmetic cover ring.
Wherein the adhesive of step (A) and step (B) has a coating thickness of 4 μm at the time of coating.
And (3) a layer of coating 4 can be arranged on the surface of the PET film of the finished product of the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring, and when the cosmetic cover ring is used by a customer, relevant patterns can be printed on the surface of the coating 4 according to the needs, so that the easy-to-uncover aluminum plastic cover film for the cosmetic cover ring with the printing layer 5 can be obtained. Wherein the coating layer 4 is an acrylic resin coating, and the thickness of the coating layer 4 is 1 mu m.
Example 4:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring in this embodiment is the same as that in embodiment 1, and is different in that: the outer layer 1 is a PET film layer with the thickness of 6 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 6 mu m, and the thickness of the heat sealing layer 3 is 32 mu m; wherein, the heat seal layer 3 is composed of 50wt% of ethylene-propylene copolymer elastomer and 50wt% of PE, and the PE in the embodiment is L LDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 1, except that:
the ethylene-propylene copolymer elastomer was 50 parts by weight and the LLDPE was 50 parts by weight, and the thickness of the PE film prepared was 32. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 1, and is different in that: the adhesive of step (A) and step (B) was applied at a thickness of 3 μm.
The coating 4 arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the embodiment is an acrylic resin coating, and the thickness of the coating 4 is 1 mu m.
Example 5:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring in this embodiment is the same as that in embodiment 2, and is different in that: the outer layer 1 is a 9 μm PET film layer, the aluminum foil layer 2 is a 9 μm aluminum foil, and the thickness of the heat seal layer 3 is 30 μm, wherein the heat seal layer 3 is composed of 65wt% ethylene propylene copolymer elastomer and 35wt% PE, and the PE in the embodiment is L LDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 2, except that:
the ethylene-propylene copolymer elastomer was 65 parts by weight and the LLDPE was 35 parts by weight, and the thickness of the PE film prepared was 30. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 2, and is different in that: the adhesive of step (A) and step (B) was applied at a thickness of 3 μm.
The coating 4 is arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring, the coating 4 is acrylic resin paint, and the thickness of the coating 4 is 1.2 mu m.
Example 6:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring of this embodiment is the same as that of embodiment 3, and is different in that: the outer layer 1 is a PET film layer with the thickness of 12 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 12 mu m, and the thickness of the heat sealing layer 3 is 35 mu m; wherein, the heat sealing layer 3 is composed of 80wt% of ethylene-propylene copolymer elastomer and 10wt% of PE, and the PE in the embodiment is LLDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 3, except that:
the ethylene-propylene copolymer elastomer was 80 parts by weight and the LLDPE was 20 parts by weight, and the thickness of the PE film prepared was 35. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 3, and the difference is that: the adhesive of step (A) and step (B) was applied at a thickness of 3.5. Mu.m.
The coating 4 is arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring, the coating 4 is acrylic resin paint, and the thickness of the coating 4 is 1.2 mu m.
Example 7:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring in this embodiment is the same as that in embodiment 1, and is different in that: the outer layer 1 is a PET film layer with the thickness of 15 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 15 mu m, and the thickness of the heat sealing layer 3 is 38 mu m; wherein, the heat seal layer 3 is composed of 50wt% of ethylene-propylene copolymer elastomer and 50wt% of PE, and the PE in the embodiment is HDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 1, except that:
the ethylene-propylene copolymer elastomer was 50 parts by weight and the HDPE was 50 parts by weight, and the thickness of the PE film prepared was 38. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 1, and is different in that: the adhesive of step (A) and step (B) was applied at a thickness of 3.5. Mu.m.
The coating 4 arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the embodiment is an acrylic resin coating, and the thickness of the coating 4 is 1.6 mu m.
Example 8:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring in this embodiment is the same as that in embodiment 2, and is different in that: the outer layer 1 is a PET film layer with the thickness of 20 mu m, the aluminum foil layer 2 is an aluminum foil with the thickness of 20 mu m, and the heat sealing layer 3 is 42 mu m; wherein, the heat seal layer 3 is composed of 65wt% of ethylene-propylene copolymer elastomer and 35wt% of PE, and the PE in the embodiment is HDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 2, except that:
the ethylene-propylene copolymer elastomer was 65 parts by weight and the HDPE was 35 parts by weight, and the thickness of the PE film prepared was 42. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 2, and is different in that: the adhesive of step (A) and step (B) was applied at a thickness of 4. Mu.m.
The coating 4 arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the embodiment is an acrylic resin coating, and the thickness of the coating 4 is 1.6 mu m.
Example 9:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring of this embodiment is the same as that of embodiment 3, and is different in that: the outer layer 1 is a 23-mu m PET film layer, the aluminum foil layer 2 is 25 mu m aluminum foil, and the thickness of the heat sealing layer 3 is 47 mu m; wherein, the heat seal layer 3 is composed of 50wt% of ethylene-propylene copolymer elastomer and 50wt% of PE, and the PE in the embodiment is HDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 3, except that:
the ethylene-propylene copolymer elastomer was 80 parts by weight and the HDPE was 20 parts by weight, and the thickness of the PE film prepared was 47. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 3, and the difference is that: the adhesive of step (A) and step (B) was applied at a thickness of 4.5. Mu.m.
The coating 4 arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the embodiment is an acrylic resin coating, and the thickness of the coating 4 is 2 mu m.
Example 10:
the structure of an easy-to-tear aluminum plastic cover film for a cosmetic cover ring in this embodiment is the same as that in embodiment 1, and is different in that:
the difference is that: the outer layer 1 is a 17-mu m PET film layer, the aluminum foil layer 2 is 15 mu m aluminum foil, and the thickness of the heat sealing layer 3 is 30 mu m; wherein, the heat sealing layer 3 is composed of 90wt% of ethylene-propylene copolymer elastomer and 10wt% of PE, and the PE in the embodiment is LLDPE.
The heat-seal layer 3 of this example was prepared in the same manner as in example 1, except that:
the ethylene-propylene copolymer elastomer was 90 parts by weight and the LLDPE was 10 parts by weight, and the thickness of the PE film prepared was 30. Mu.m.
The production process of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in this embodiment is the same as that in embodiment 1, and is different in that: the adhesive of step (A) and step (B) was applied at a thickness of 3 μm.
The coating 4 arranged on the surface of the PET film of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the embodiment is an acrylic resin coating, and the thickness of the coating 4 is 1 mu m.
Comparative example 1:
the aluminum plastic cover film of this comparative example is identical to example 1 in that: the ethylene-propylene copolymer elastomer in the heat seal layer 3 is replaced by polybutene.
Comparative example 2:
the aluminum plastic cover film of this comparative example is identical to example 1 in that: the heat-seal layer 3 consisted of 30wt% ethylene propylene copolymer elastomer and 75 wt% PE, which consisted of LLDPE and HDPE, wherein LLDPE accounted for 35wt% of total PE and HDPE accounted for 35wt% of total PE.
Comparative example 3:
the aluminum plastic cover film of this comparative example is identical to example 1 in that: the heat-seal layer 3 consists of 95wt% of ethylene-propylene copolymer elastomer and 5w t% of PE, wherein the PE is LLDPE. Because the ethylene-propylene copolymer elastomer content is too high, the film forming property of the heat seal layer is too poor, and the heat seal layer is difficult to process.
Performance test:
the plastic-aluminum cover films for cosmetic cover rings prepared in examples 1 to 9 and comparative examples 1 to 3 were tested for easy-to-open property, sealability, and heat-seal uniformity using the following test methods, and the test results are shown in table 1:
1) Heat sealability test method and evaluation: the heat-seal layers of the cosmetic cover films of examples 1 to 9 and comparative examples 1 to 3 were heat-sealed with a PP sheet under a heat-seal pressure of 0.2MPa for a heat-seal time of 1s, and the heat-seal equipment was an HST-H3 heat-seal tester of Jinan optical mechanical and electrical technologies Co., ltd.
Evaluation criteria: when the heat seal strength is higher than 3N/15mm and the temperature is not higher than 150 ℃, the heat seal strength is qualified, and when the heat seal strength is higher than 150 ℃, the heat seal strength is NG; a temperature of 150℃or less when the heat seal strength is more than 5N/15mm is regarded as excellent.
2) And (3) a tightness test method and an evaluation: GB/T1038-2000 "differential pressure method for testing gas permeability of Plastic film and sheet" is adopted when gas permeability is less than or equal to 0.5cm 3 At the time of/square meter 24h 0.1MPa, the sealing property is OK; when the gas permeation quantity is more than or equal to 0.5cm 3 At 24 h.0.1 MPa, the sealing property was NG.
3) Heat seal uniformity test: the aluminum plastic cover films corresponding to the embodiments are respectively heat-sealed with the PP cover ring, and after being placed for 2 hours at room temperature, the heat-sealed aluminum plastic cover films and the PP cover ring are peeled off one by one, the heat-sealed surfaces of the cover films are observed, and if the heat-sealed positions of the aluminum plastic cover films and the cover ring are uniformly whitened, the OK is obtained, and if the heat-sealed positions of the aluminum plastic cover films and the cover ring are not uniform, the NG is obtained.
TABLE 1
Performance testing Heat sealability Sealability of Uniformity of heat sealing
Example 1 Excellent and excellent properties OK OK
Example 2 Qualified product OK OK
Example 3 Qualified product OK OK
Example 4 Qualified product OK OK
Example 5 Qualified product OK OK
Example 6 Excellent and excellent properties OK OK
Example 7 Qualified product OK OK
Example 8 Qualified product OK OK
Example 9 Excellent and excellent properties OK OK
Comparative example 1 NG OK NG
Comparative example 2 NG OK NG
Comparative example 3 NG NG NG
As shown in the experimental results of Table 1, the heat sealing temperatures of the easy-to-tear aluminum plastic cover films in the embodiments 1 to 9 of the application are all lower than 150 ℃, and the easy-to-tear aluminum plastic cover films of the application have good heat sealing performance. When the mass of the ethylene-propylene copolymer elastomer in the PE film layer accounts for 50-90% of the total mass of the heat sealing layer, the easy-to-tear aluminum plastic cover film and the PP or PE cover ring are subjected to actual heat sealing test, and the defective rate is less than 0.005%, wherein when the mass content of the ethylene-propylene copolymer elastomer in the heat sealing layer is 80%, the heat sealing uniformity is optimal; when the mass of the ethylene-propylene copolymer elastomer is less than 50% of the total mass of the heat sealing layer, the quality of the plastic-aluminum cover film which is easy to uncover is more than 0.01% when the plastic-aluminum cover film is heat sealed with the PP or P E cover ring, and the plastic-aluminum cover film is not suitable for being matched with the cosmetic cover ring for packaging; when the mass of the ethylene-propylene copolymer elastomer is more than 90% of the total mass of the heat sealing layer, the film forming property of the heat sealing layer is too poor, the processing is difficult, and the cover is difficult to uncover after heat sealing. The easy-to-uncovering type aluminum plastic cover film for the cosmetic cover ring has low heat sealing temperature when being heat-sealed with the PP or PE cover ring, high heat sealing strength and good heat sealing uniformity, and is not easy to open when being impacted by certain air pressure when being sealed with other packages after the cosmetic cover ring is compounded with the easy-to-uncovering type aluminum plastic cover film.
While the preferred embodiments of the present application have been illustrated and described, the present application is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.

Claims (8)

1. The utility model provides an easily take off plastic-aluminum plastic cover film for cosmetic covering circle, is used for the heat-seal of PP or PE covering circle, includes skin, aluminium foil layer and heat seal layer, skin and heat seal layer are established respectively the upper and lower both sides face on aluminium foil layer, skin with between the aluminium foil layer, aluminium foil layer and heat seal layer pass through the adhesive and connect, its characterized in that, the skin is 6-30 mu m's PET thin film layer, aluminium foil layer is 6-50 mu m's O state aluminium foil, the heat seal layer is 30-50 mu m's PE thin film layer, wherein, PE thin film layer comprises ethylene-propylene copolymer elastomer and PE; the adhesive is solvent polyurethane glue;
the mass ratio of the ethylene-propylene copolymer elastomer to PE is 80:20;
the PE is selected from LLDPE or LDPE or a combination of the LLDPE and the LDPE.
2. The easy-to-tear aluminum plastic cover film for a cosmetic cover ring of claim 1, wherein the outer layer is a 12 μm PET film layer, the aluminum foil layer is a 50 μm O-state aluminum foil, and the heat seal layer is a 40 μm PE film layer.
3. The easy-to-tear aluminum plastic cover film for cosmetic cover ring according to claim 1, wherein PE is composed of 50 parts by weight of LLDPE and 50 parts by weight of LDPE, based on 100 parts by weight.
4. The easy-to-tear aluminum plastic cover film for a cosmetic cover ring of claim 1, wherein the heat-seal layer is prepared by the following method:
and (3) uniformly mixing the ethylene-propylene copolymer elastomer and PE in a mixer, and preparing a PE film by adopting a film blowing method to obtain the heat sealing layer.
5. A process for producing the easy-to-tear aluminum plastic cover film for a cosmetic cover ring according to any one of claims 1 to 4, comprising the steps of:
(A) Coating an adhesive on one side of an outer layer on a dry-method compounding machine, drying a solvent to obtain an outer adhesive layer, and pressing an aluminum foil layer by a compounding roller to obtain a compound aluminum foil layer;
(B) Coating adhesive on the aluminum foil surface of the composite aluminum foil layer again, drying the solvent to obtain an outer adhesive layer, enabling the outer adhesive layer to face the heat seal layer, and pressing through a composite roller to obtain a semi-finished product;
(C) And (C) curing the semi-finished product obtained in the step (B) for 48 hours at the temperature of 40 ℃ in a heat preservation room, and then performing die cutting to obtain the easy-to-uncover aluminum plastic cover film finished product for the cosmetic cover ring.
6. The process for producing a tamper-evident plastic-aluminum cover film for a cosmetic cover ring according to claim 5, wherein the adhesive is applied in a thickness of 3 to 5 μm.
7. Use of an easy-to-tear aluminium plastic cover film for a cosmetic covering according to any one of claims 1 to 4 in packaging applications, characterized in that a coating layer is provided on the surface of the PET film of the easy-to-tear aluminium plastic cover film for a cosmetic covering, and a printing layer is provided on the surface of the coating layer.
8. The application of the easy-to-tear aluminum plastic cover film for the cosmetic cover ring in the packaging field according to claim 7, wherein the coating is an acrylic coating material, and the thickness of the coating is 0.5-2 μm.
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