CN110843297A - High-barrier VMPET film and preparation method thereof - Google Patents

High-barrier VMPET film and preparation method thereof Download PDF

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Publication number
CN110843297A
CN110843297A CN201911108840.9A CN201911108840A CN110843297A CN 110843297 A CN110843297 A CN 110843297A CN 201911108840 A CN201911108840 A CN 201911108840A CN 110843297 A CN110843297 A CN 110843297A
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Prior art keywords
layer
base film
film
pet base
vmpet
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CN201911108840.9A
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Chinese (zh)
Inventor
曹赤鹏
赵金彬
张忠跃
余伯春
张雪瑜
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JIAXING PENGXIANG PACKAGING MATERIAL Co Ltd
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JIAXING PENGXIANG PACKAGING MATERIAL Co Ltd
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Priority to CN201911108840.9A priority Critical patent/CN110843297A/en
Publication of CN110843297A publication Critical patent/CN110843297A/en
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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
    • B32B27/06—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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable

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

Abstract

The invention discloses a high-barrier VMPET film and a preparation method thereof, wherein the VMPET film comprises a PET base film and an aluminum coating coated on the PET base film, and the PET base film comprises a corona treatment layer, a core layer and a blending modification layer which are sequentially arranged from top to bottom. The PET base film modified by PEN blending is applied, so that the barrier property of the base film is improved, and the barrier property is not influenced by the performance of the aluminum coating.

Description

High-barrier VMPET film and preparation method thereof
Technical Field
The invention relates to the technical field of film processing, in particular to a high-barrier VMPET film and a preparation method thereof.
Background
The high-barrier VMPET aluminized film belongs to the field of new material application, is a packaging material with high barrier property, and is widely applied to composite packaging of foods, beverages, medicines, cosmetics and the like. The PET base film is formed by arranging an aluminum layer on the surface of a PET base film under a vacuum condition by applying an aluminum plating process, has good metallic luster, antistatic property and shading property, particularly has good gas and moisture resistance, and the barrier property of the PET base film is improved by dozens of times or even hundreds of times compared with that of the PET base film before aluminum plating.
At present, the barrier property is generally improved by increasing the thickness of the aluminum layer on the market, but in practice, the barrier property is not in direct proportion to the thickness of the aluminum layer, when the thickness of the aluminum layer is increased, the compactness and the adhesive force of the aluminum layer are reduced, and the micro pores of the aluminum layer are increased, so that the barrier property is reduced. And the barrier property of the material will be attenuated with the storage time.
Based on the situation, the invention provides a novel high-barrier VMPET film and a preparation method thereof, which can effectively solve the problems.
Disclosure of Invention
Aiming at the condition of the prior art, in order to overcome the defects, the PET base film modified by PEN blending is applied, so that the barrier property of the base film is improved, and the barrier property is not influenced by the performance of an aluminum coating.
The invention is realized by the following technical scheme:
a high-barrier VMPET film comprises a PET base film and an aluminum coating coated on the PET base film, wherein the PET base film comprises a corona treatment layer, a core layer and a blending modification layer which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials of a corona treatment layer, a core layer and a blending modification layer by a three-layer extruder, and then performing biaxial tension to obtain a three-layer PET base film;
B. and heating and melting aluminum metal in a vacuum state until the aluminum metal is evaporated, condensing aluminum atoms on the surface of the corona treatment layer of the PET base film to form an aluminum-plated layer, and rolling to obtain the PET base film.
According to the above technical solution, as a further preferable technical solution of the above technical solution, the corona treatment layer and the core layer are both PET polyester chips.
According to the above technical solution, as a further preferable technical solution of the above technical solution, the blending modification layer is composed of PET polyester chip and PEN.
According to the above aspect, as a more preferable aspect of the above aspect, the thickness of the aluminum plating layer is 450 angstroms.
According to the above aspect, as a more preferable aspect of the above aspect, the degree of vacuum in step B is 10-4mbar。
According to the above technical solution, as a further preferable technical solution of the above technical solution, the corona treatment layer, the core layer and the blending modification layer respectively account for the PET base film in the following thickness ratios: 10% -20%, 60% -80% and 10% -20%.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention improves the barrier property of the aluminizer from the base film, and does not start from the aluminizing process, thereby reducing the influence of factors such as the compactness of the aluminizer on the improvement of the barrier property and greatly solving the problem that the barrier property declines along with time.
2. The naphthalene ring in the PEN molecular structure has larger conjugated double bonds than the benzene ring in PET, and the modified VMPET film obtained after blending modification with PET and aluminum plating on the corona surface has higher barrier property than the common VMPET film.
3. The content of PEN can be adjusted to obtain VMPET films with different degrees of barrier properties.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
Reference numerals: 1-aluminum coating, 2-PET basal membrane, 21-corona treatment layer, 22-core layer and 23-blending modification layer.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
A high-barrier VMPET film and a method for preparing the same according to the present invention will be described in detail with reference to fig. 1.
Example 1:
referring to fig. 1, the VMPET film comprises a PET base film 2 and an aluminum coated layer 1 coated on the PET base film 2, wherein the PET base film 2 comprises a corona treatment layer 21, a core layer 22 and a blending modification layer 23 which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials, namely a corona treatment layer 21, a core layer 22 and a blending modification layer 23, by a three-layer extruder, and then performing biaxial tension to obtain a three-layer PET base film 2;
B. in a vacuum state, aluminum metal is heated and melted to be evaporated, aluminum atoms are condensed on the surface of the corona treatment layer 21 of the PET base film 2 to form an aluminum plating layer 1, and then the aluminum plating layer is rolled to obtain the aluminum-plated film.
Example 2:
referring to fig. 1, the VMPET film comprises a PET base film 2 and an aluminum coated layer 1 coated on the PET base film 2, wherein the PET base film 2 comprises a corona treatment layer 21, a core layer 22 and a blending modification layer 23 which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials, namely a corona treatment layer 21, a core layer 22 and a blending modification layer 23, by a three-layer extruder, and then performing biaxial tension to obtain a three-layer PET base film 2;
B. in a vacuum state, aluminum metal is heated and melted to be evaporated, aluminum atoms are condensed on the surface of the corona treatment layer 21 of the PET base film 2 to form an aluminum plating layer 1, and then the aluminum plating layer is rolled to obtain the aluminum-plated film.
Further, in another embodiment, the corona treated layer 21 and the core layer 22 are both PET polyester chips.
Further, in another embodiment, the blend modification layer 23 is composed of PET polyester chip and PEN.
Further, in another embodiment, the thickness of the aluminum plated layer 1 is 450 angstroms.
Further, in another embodiment, the vacuum degree in step B is 10-4mbar。
Further, in another embodiment, the corona treatment layer 21, the core layer 22 and the blending modification layer 23 respectively account for the thickness ratio of the PET base film 2 as follows: 10% -20%, 60% -80% and 10% -20%.
Example 3:
referring to fig. 1, the VMPET film comprises a PET base film 2 and an aluminum coated layer 1 coated on the PET base film 2, wherein the PET base film 2 comprises a corona treatment layer 21, a core layer 22 and a blending modification layer 23 which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials, namely a corona treatment layer 21, a core layer 22 and a blending modification layer 23, by a three-layer extruder, and then performing biaxial tension to obtain a three-layer PET base film 2;
B. in a vacuum state, aluminum metal is heated and melted to be evaporated, aluminum atoms are condensed on the surface of the corona treatment layer 21 of the PET base film 2 to form an aluminum plating layer 1, and then the aluminum plating layer is rolled to obtain the aluminum-plated film.
In this embodiment, the corona treatment layer 21 and the core layer 22 are both PET polyester chips.
In this embodiment, the blend modified layer 23 is composed of PET polyester chip and PEN.
In the present embodiment, the thickness of the aluminum plated layer 1 is 450 angstroms.
In this example, the degree of vacuum in step B was 10-4mbar。
In the present embodiment, the corona treatment layer 21 accounts for 15% of the thickness of the PET base film 2; the core layer 22 accounts for 65% of the thickness of the PET base film 2; the blend modified layer 23 was a modified treated layer of PET, containing 90% PET and 10% PEN, and having a thickness ratio of 20%.
The oxygen barrier property of the obtained VMPET film is improved by 30 percent compared with that before blending modification treatment, and the water vapor barrier property is improved by 15 percent compared with that before treatment.
Example 4:
referring to fig. 1, the VMPET film comprises a PET base film 2 and an aluminum coated layer 1 coated on the PET base film 2, wherein the PET base film 2 comprises a corona treatment layer 21, a core layer 22 and a blending modification layer 23 which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials, namely a corona treatment layer 21, a core layer 22 and a blending modification layer 23, by a three-layer extruder, and then performing biaxial tension to obtain a three-layer PET base film 2;
B. in a vacuum state, aluminum metal is heated and melted to be evaporated, aluminum atoms are condensed on the surface of the corona treatment layer 21 of the PET base film 2 to form an aluminum plating layer 1, and then the aluminum plating layer is rolled to obtain the aluminum-plated film.
In this embodiment, the corona treatment layer 21 and the core layer 22 are both PET polyester chips.
In this embodiment, the blend modified layer 23 is composed of PET polyester chip and PEN.
In the present embodiment, the thickness of the aluminum plated layer 1 is 450 angstroms.
In this example, the degree of vacuum in step B was 10-4mbar。
In the present embodiment, the corona treatment layer 21 accounts for 15% of the thickness of the PET base film 2; the core layer 22 accounts for 65% of the thickness of the PET base film 2; the blend modified layer 23 was a PET-modified layer containing 85% PET and 15% PEN in a thickness ratio of 20%.
The oxygen barrier property of the obtained VMPET film is improved by 40 percent compared with that before blending modification treatment, and the water vapor barrier property is improved by 20 percent compared with that before treatment.
Example 5:
referring to fig. 1, the VMPET film comprises a PET base film 2 and an aluminum coated layer 1 coated on the PET base film 2, wherein the PET base film 2 comprises a corona treatment layer 21, a core layer 22 and a blending modification layer 23 which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials, namely a corona treatment layer 21, a core layer 22 and a blending modification layer 23, by a three-layer extruder, and then performing biaxial tension to obtain a three-layer PET base film 2;
B. in a vacuum state, aluminum metal is heated and melted to be evaporated, aluminum atoms are condensed on the surface of the corona treatment layer 21 of the PET base film 2 to form an aluminum plating layer 1, and then the aluminum plating layer is rolled to obtain the aluminum-plated film.
In this embodiment, the corona treatment layer 21 and the core layer 22 are both PET polyester chips.
In this embodiment, the blend modified layer 23 is composed of PET polyester chip and PEN.
In the present embodiment, the thickness of the aluminum plated layer 1 is 450 angstroms.
In this example, the degree of vacuum in step B was 10-4mbar。
In the present embodiment, the corona treatment layer 21 accounts for 15% of the thickness of the PET base film 2; the core layer 22 accounts for 65% of the thickness of the PET base film 2; the blend modified layer 23 is a modified treated layer of PET, and contains 80% of PET and 20% of PEN in a thickness ratio of 20%.
The oxygen barrier property of the obtained VMPET film is improved by 50% compared with that before blending modification treatment, and the water vapor barrier property is improved by 25% compared with that before treatment.
The high-barrier VMPET film is a PET base film modified by PEN blending 10-4And (3) heating and melting aluminum metal to be evaporated under the vacuum degree of more than mbar, condensing aluminum atoms on the surface of the PET material to form an extremely thin aluminum-plated layer, and then rolling to obtain the aluminum-plated PET material.
The VMPET film structure is represented by A/B/C/D, wherein A is an extremely thin aluminum-plated layer and is 10-4Aluminum is condensed on the B layer at a vacuum degree above mbar, and the thickness is generally 450 angstroms; the layer B is a PET corona treatment layer for aluminum plating, and the thickness proportion is 10-20%; the layer C is a core layer of PET with a thickness ratio of 60-80%, and the layer D is a layer PThe ET blending modified layer is mainly a mixture of PET and PEN, is an aluminized layer with the thickness proportion of 10-20 percent, and is used for compounding with a material with heat sealing property, such as PE.
Table 1: VMPET composition and Properties
Figure BDA0002272121480000061
As shown in table 1, the high barrier VMPET film of the present invention has the following advantages: 1) the PET base film modified by PEN blending improves the barrier property of the base film, and has higher barrier property than the common VMPET film; 2) the increment of oxygen barrier property and the increment of water vapor barrier property are in direct proportion to the addition amount of PEN, so that the VMPET film with better barrier property can be obtained.
Based on the description of the present invention and the drawings, those skilled in the art can easily make or use the high-barrier VMPET film structure of the present invention and can produce the positive effects described in the present invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims (6)

1. The high-barrier VMPET film is characterized by comprising a PET base film (2) and an aluminum coating layer (1) coated on the PET base film (2), wherein the PET base film (2) comprises a corona treatment layer (21), a core layer (22) and a blending modification layer (23) which are sequentially arranged from top to bottom; the preparation method of the VMPET film comprises the following steps:
A. extruding three raw materials of a corona treatment layer (21), a core layer (22) and a blending modification layer (23) through a three-layer extruder, and then performing bidirectional stretching to obtain a PET base film (2) with a three-layer structure;
B. in a vacuum state, aluminum metal is heated and melted to be evaporated, aluminum atoms are condensed on the surface of a corona treatment layer (21) of a PET base film (2) to form an aluminum plating layer (1), and then the aluminum plating layer is rolled to obtain the PET base film.
2. The high barrier VMPET film of claim 1, wherein the corona treatment layer (21) and the core layer (22) are PET polyester chips.
3. The high barrier VMPET film of claim 1, wherein the blend modified layer (23) is comprised of PET polyester chip and PEN.
4. The high-barrier VMPET film as claimed in claim 1, wherein the thickness of the aluminized layer (1) is 450 angstroms.
5. A shank as set forth in claim 1The VMPET barrier film is characterized in that the vacuum degree in the step B is 10- 4mbar。
6. The high-barrier VMPET film as claimed in any one of claims 1 to 5, wherein the corona treatment layer (21), the core layer (22) and the blending modification layer (23) respectively account for the thickness ratio of the PET base film (2) as follows: 10% -20%, 60% -80% and 10% -20%.
CN201911108840.9A 2019-11-13 2019-11-13 High-barrier VMPET film and preparation method thereof Pending CN110843297A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112406242A (en) * 2020-11-23 2021-02-26 佛山威明塑胶有限公司 Exempt from to laminate special-shaped membrane

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104559082A (en) * 2014-12-24 2015-04-29 常州钟恒新材料有限公司 Modified BOPET transparent high-barrier composite membrane and preparing method thereof
CN106427149A (en) * 2016-09-18 2017-02-22 江苏兴业聚化有限公司 PET aluminum-plated base membrane and preparation method thereof
CN207172946U (en) * 2017-09-08 2018-04-03 嘉兴鹏翔包装材料有限公司 One kind decoration uses high brightness VMPET films
CN109467895A (en) * 2018-12-05 2019-03-15 常州瑞杰新材料科技有限公司 A kind of high-barrier PET material and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104559082A (en) * 2014-12-24 2015-04-29 常州钟恒新材料有限公司 Modified BOPET transparent high-barrier composite membrane and preparing method thereof
CN106427149A (en) * 2016-09-18 2017-02-22 江苏兴业聚化有限公司 PET aluminum-plated base membrane and preparation method thereof
CN207172946U (en) * 2017-09-08 2018-04-03 嘉兴鹏翔包装材料有限公司 One kind decoration uses high brightness VMPET films
CN109467895A (en) * 2018-12-05 2019-03-15 常州瑞杰新材料科技有限公司 A kind of high-barrier PET material and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112406242A (en) * 2020-11-23 2021-02-26 佛山威明塑胶有限公司 Exempt from to laminate special-shaped membrane

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