CN212684942U - Transparent high-barrier evaporation nylon film - Google Patents
Transparent high-barrier evaporation nylon film Download PDFInfo
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- CN212684942U CN212684942U CN202021143019.9U CN202021143019U CN212684942U CN 212684942 U CN212684942 U CN 212684942U CN 202021143019 U CN202021143019 U CN 202021143019U CN 212684942 U CN212684942 U CN 212684942U
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Abstract
The utility model relates to the field of film materials, in particular to a transparent high-barrier evaporation nylon film, which comprises a surface coating, an evaporation layer, a bottom coating and a nylon substrate layer from outside to inside in sequence; the nylon substrate layer is formed by five-layer coextrusion biaxial stretching preparation on first nylon layer, second nylon layer, barrier layer, third nylon layer and fourth nylon layer, the barrier layer is EVOH. The transparent high-barrier evaporation nylon film provided by the utility model has excellent barrier effect on oxygen, fragrance and the like, and has the advantages of transparency and visualization while ensuring the quality of food in the package; the substrate layer adopts a five-layer co-extrusion nylon composite structure, not only has excellent barrier property, but also can keep high strength and excellent puncture resistance, and is particularly suitable for packaging products such as pet food packaging, nuts, cakes, meat products, dry goods and the like which have requirements on high barrier property of gas, aroma and taste.
Description
Technical Field
The utility model relates to a film material field especially relates to a transparent high resistant separates coating by vaporization nylon film.
Background
With the improvement of living standard and the upgrading of consumption concept of people, the packaging requirement of products is higher and higher. For example, in the field of food packaging, manufacturers and consumers want to prolong the shelf life of products without affecting the appearance of the packages and improve the grade of the packages.
Although the nylon film has excellent oxygen barrier performance, in the actual use process, for some product packages with higher requirements on oxygen barrier performance, the barrier performance of the nylon film cannot meet the requirements, so that the barrier performance of the nylon film is particularly urgent to be further improved.
For example, patent document CN209396284U, published as 2019, 9, 17 and named "a high-barrier polyamide film" discloses a high-barrier polyamide film, which comprises an aluminum-plated layer, a first primer layer, a polyamide substrate layer, a second primer layer and a polyvinylidene chloride coating layer from top to bottom in sequence. The high-barrier polyamide film provided by the scheme takes a polyamide material as a base material layer, and the upper outer surface and the lower outer surface of the polyamide film are respectively provided with the aluminized layer and the polyvinylidene chloride coating, so that the gas and moisture resistance of the polyamide film under a high-humidity condition is improved, and the high-barrier polyamide film has a certain light-shielding property, and meanwhile, the composite film layer of the high-barrier polyamide film is simple in structure and has excellent barrier property. However, the aluminum-plated layer is adopted, so that the film is opaque, the visibility is poor when the film is used for product packaging, and a consumer cannot clearly see the packaged product condition.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the prior high-barrier polyamide film mentioned in the background art adopts an aluminum coating layer to cause poor opaque visibility of the film, the utility model provides a transparent high-barrier evaporation coating nylon film, which comprises a surface coating layer, an evaporation coating layer, a bottom coating layer and a nylon base material layer from outside to inside in sequence;
the nylon substrate layer is formed by five-layer coextrusion biaxial stretching preparation on first nylon layer, second nylon layer, barrier layer, third nylon layer and fourth nylon layer, the barrier layer is EVOH.
On the basis of the scheme, further, the surface coating is a two-component polyurethane coating.
On the basis of the scheme, the thickness of the surface coating is 1-2 mu m.
On the basis of the scheme, the evaporation layer is aluminum oxide or silicon dioxide.
On the basis of the scheme, the thickness of the evaporation layer is 8-300 nm.
On the basis of the scheme, further, the base coat is a polyurethane base coat or an acrylic base coat.
On the basis of the scheme, the thickness of the bottom coating is 2-4 μm.
On the basis of the scheme, the first nylon layer, the second nylon layer, the third nylon layer and the fourth nylon layer are all made of low-water-absorption nylon materials.
On the basis of the scheme, the total thickness of the first nylon layer, the second nylon layer, the blocking layer, the third nylon layer and the fourth nylon layer is 12-30 micrometers, and the thickness of the blocking layer is 1-4 micrometers.
On the basis of the scheme, furthermore, the upper surface and the lower surface of the nylon base material layer are corona surfaces, and the corona value is greater than 52 dynes.
A pair of transparent high resistant separates coating by vaporization nylon film, compare with prior art, have following technological effect:
1. the packaging film has excellent barrier effect on oxygen, fragrance and the like, and has the advantages of transparency and visualization while ensuring the quality of food in the packaging;
2. the substrate layer adopts a five-layer co-extrusion nylon composite structure, not only has excellent barrier property, but also has higher strength and excellent puncture resistance, and is particularly suitable for packaging products such as pet food packaging, nuts, cakes, meat products, dry goods and the like which have requirements on high barrier property of gas, fragrance retention and flavor retention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the transparent high-barrier evaporation nylon film of the present invention.
Reference numerals:
10 surface coating 20 vapor deposition 30 base coating
40 nylon substrate layer 41 first nylon layer 42 second nylon layer
43 barrier layer 44 third nylon layer 45 fourth nylon layer
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "couple" or "couples" and the like are not restricted to physical or mechanical connections, but may include electrical connections, optical connections, and the like, whether direct or indirect.
The utility model provides a transparent high-barrier evaporation nylon film, which comprises a surface coating 10, an evaporation layer 20, a bottom coating 30 and a nylon substrate layer 40 from outside to inside in sequence;
the nylon substrate layer 40 is formed by five-layer coextrusion biaxial stretching preparation by a first nylon layer 41, a second nylon layer 42, a barrier layer 43, a third nylon layer 44 and a fourth nylon layer 45, and the barrier layer 43 is EVOH.
In specific implementation, as shown in fig. 1, the transparent high-barrier evaporation-coated nylon film comprises a surface coating 10, an evaporation-coated layer 20, a primer layer 30 and a nylon base material layer 40 in sequence from outside to inside;
the specific process method comprises the following steps: the nylon base material layer 40 is coated and dried on the upper surface thereof by a coater in an anilox roll coating manner to form a primer layer 30, and then a vapor deposition layer 20 is formed on the primer layer 30 by a chemical vapor deposition method or a physical vapor deposition method, and then a surface coating 10 is formed on the upper surface of the vapor deposition layer 20 by an anilox roll coating manner.
The nylon is used as a base material layer, so that the whole film can be endowed with excellent barrier property and mechanical strength; the provision of the vapor deposition layer 20 can impart excellent gas barrier properties to the entire film; the primer layer 30 is provided mainly for pretreating the upper surface of the nylon base material layer 40 to improve the adhesion between the nylon base material layer 40 and the vapor deposition layer 20. The vapor deposition layer 20 has good barrier properties, and the surface coating 10 is provided on the upper surface of the vapor deposition layer 20 to protect the vapor deposition layer 20 and prevent the vapor deposition layer 20 from being damaged.
The transparent high-barrier evaporation nylon film provided by the utility model has excellent barrier effect on oxygen, fragrance and the like, and has the advantages of transparency and visualization while ensuring the quality of food in the package; the substrate layer adopts a five-layer co-extrusion nylon composite structure, not only has excellent barrier property, but also can keep high strength and excellent puncture resistance, and is particularly suitable for packaging products such as pet food packaging, nuts, cakes, meat products, dry goods and the like which have requirements on high barrier property of gas, aroma and taste.
Preferably, the surface coating 10 is a two-component polyurethane coating.
In specific implementation, the surface coating 10 is a coating prepared by drying a bi-component polyurethane primer, and can be a bi-component polyurethane coating prepared by a novel organosilicon acrylic acid bi-component polyurethane coating and a preparation method thereof, which are published under the number of CN103031046A, and the bi-component polyurethane coating has excellent physical and mechanical properties, temperature resistance, weather resistance, chemical medium resistance and outstanding wear resistance, or adopts a bi-component polyurethane coating with other wear resistance; the two-component polyurethane coating with excellent wear resistance can protect the evaporation layer 20 and prevent the evaporation layer 20 from being damaged.
Preferably, the deposition layer 20 is alumina or silica.
In specific implementation, the evaporation layer 20 is made of alumina or silica, and a film layer formed by using the alumina or silica is compact and has good transparency, and meanwhile, has excellent oxygen and moisture barrier properties.
Preferably, the primer layer 30 is a polyurethane primer layer or an acrylic primer layer.
In specific implementation, the primer layer 30 is a polyurethane primer or an acrylic resin primer, and the two types of coatings are obtained by drying, so that the adhesion between the nylon base material layer 40 and the evaporation layer 20 can be well improved.
Preferably, the first nylon layer 41, the second nylon layer 42, the third nylon layer 44 and the fourth nylon layer 45 are all low water absorption nylon materials.
In specific implementation, the first nylon layer 41, the second nylon layer 42, the third nylon layer 44, and the fourth nylon layer 45 are all low water absorption nylon materials, which can effectively reduce the water absorption of the nylon base material layer 40, further reduce the influence of humidity on the barrier layer 43, and make the nylon base material layer 40 have excellent barrier performance, and the low water absorption nylon materials can be specifically prepared by the component ratios of the surface layer 1, the core layer, or the surface layer 2 disclosed in "a low water absorption biaxially oriented nylon film" with publication number CN 106739322B.
Preferably, the upper surface and the lower surface of the nylon base material layer 40 are both corona surfaces, and the corona value is greater than 52 dyne.
In specific implementation, both the upper surface and the lower surface of the nylon base material layer 40 are corona surfaces, and are subjected to corona treatment, so that polar surface layers are formed on the upper surface and the lower surface of the nylon base material layer 40 to improve the adhesion performance of the surface. Preferably, the corona value is controlled to be greater than 52 dyne, so that the upper surface and the lower surface of the nylon base material layer 40 meet the printing requirements.
Preferably, the thickness of the surface coating 10 is 1 to 2 μm.
Preferably, the thickness of the evaporation layer 20 is 8 to 300 nm.
Preferably, the primer layer 30 has a thickness of 2 to 4 μm.
Preferably, the total thickness of the first nylon layer 41, the second nylon layer 42, the barrier layer 43, the third nylon layer 44 and the fourth nylon layer 45 is 12-30 μm, and the thickness of the barrier layer 43 is 1-4 μm.
In specific implementation, multiple tests and comparisons are performed and the production cost of the film is combined, so that when the thickness of the surface coating 10 is controlled to be 1-2 μm, the thickness of the evaporation layer 20 is controlled to be 8-300 nm, the thickness of the primer layer 30 is controlled to be 2-4 μm, the total thickness of the first nylon layer 41, the second nylon layer 42, the barrier layer 43, the third nylon layer 44 and the fourth nylon layer 45 is controlled to be 12-30 μm, and the thickness of the barrier layer 43 is 1-4 μm, the cost performance of the film is high, that is, the film is as thin as possible on the premise of ensuring the overall mechanical property, barrier property, transparency and other properties of the film, so that the production cost is reduced.
Although terms such as surface coating, vapor deposition, primer, nylon substrate, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A transparent high-barrier evaporation nylon film is characterized by sequentially comprising a surface coating (10), an evaporation coating (20), a bottom coating (30) and a nylon base material layer (40) from outside to inside;
the nylon substrate layer (40) is formed by five-layer coextrusion biaxial stretching preparation by a first nylon layer (41), a second nylon layer (42), a barrier layer (43), a third nylon layer (44) and a fourth nylon layer (45), and the barrier layer (43) is EVOH.
2. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the surface coating (10) is a two-component polyurethane coating.
3. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the thickness of the surface coating (10) is 1-2 mu m.
4. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the evaporation layer (20) is alumina or silicon dioxide.
5. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the thickness of the evaporation layer (20) is 8-300 nm.
6. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the primer layer (30) is a polyurethane primer layer or an acrylic primer layer.
7. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the thickness of the bottom coating (30) is 2-4 mu m.
8. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the first nylon layer (41), the second nylon layer (42), the third nylon layer (44) and the fourth nylon layer (45) are all made of low-water-absorption nylon materials.
9. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the total thickness of the first nylon layer (41), the second nylon layer (42), the blocking layer (43), the third nylon layer (44) and the fourth nylon layer (45) is 12-30 mu m, and the thickness of the blocking layer (43) is 1-4 mu m.
10. The transparent high-barrier evaporation nylon film as claimed in claim 1, wherein: the upper surface and the lower surface of the nylon base material layer (40) are corona surfaces, and the corona value is greater than 52 dynes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021143019.9U CN212684942U (en) | 2020-06-18 | 2020-06-18 | Transparent high-barrier evaporation nylon film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021143019.9U CN212684942U (en) | 2020-06-18 | 2020-06-18 | Transparent high-barrier evaporation nylon film |
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| CN212684942U true CN212684942U (en) | 2021-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912894A (en) * | 2021-09-16 | 2022-01-11 | 佛山市彩龙镀膜包装材料有限公司 | Transparent high-barrier polyester aluminum oxide-plated film and preparation method thereof |
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2020
- 2020-06-18 CN CN202021143019.9U patent/CN212684942U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912894A (en) * | 2021-09-16 | 2022-01-11 | 佛山市彩龙镀膜包装材料有限公司 | Transparent high-barrier polyester aluminum oxide-plated film and preparation method thereof |
| CN113912894B (en) * | 2021-09-16 | 2022-06-14 | 佛山市彩龙镀膜包装材料有限公司 | Transparent high-barrier polyester aluminum oxide-plated film and preparation method thereof |
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