CN220220019U - Transparent high-barrier degradable composite film - Google Patents
Transparent high-barrier degradable composite film Download PDFInfo
- Publication number
- CN220220019U CN220220019U CN202320736440.8U CN202320736440U CN220220019U CN 220220019 U CN220220019 U CN 220220019U CN 202320736440 U CN202320736440 U CN 202320736440U CN 220220019 U CN220220019 U CN 220220019U
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- China
- Prior art keywords
- layer
- film
- degradable
- barrier
- printing
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 239000010410 layer Substances 0.000 claims abstract description 56
- 230000004888 barrier function Effects 0.000 claims abstract description 36
- 239000012790 adhesive layer Substances 0.000 claims abstract description 34
- 239000004626 polylactic acid Substances 0.000 claims abstract description 28
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 27
- 229920006381 polylactic acid film Polymers 0.000 claims abstract description 18
- 239000002344 surface layer Substances 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 229920002678 cellulose Polymers 0.000 claims abstract description 5
- 239000001913 cellulose Substances 0.000 claims abstract description 5
- 239000012792 core layer Substances 0.000 claims abstract description 5
- 229920000728 polyester Polymers 0.000 claims abstract description 4
- 239000012793 heat-sealing layer Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 8
- 239000012785 packaging film Substances 0.000 abstract description 2
- 229920006280 packaging film Polymers 0.000 abstract description 2
- 239000005022 packaging material Substances 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model discloses a transparent high-barrier degradable composite film, which is sequentially provided with a degradable layer, a printing adhesive layer, a transparent barrier coating and a biaxially oriented polylactic acid film from outside to inside; the degradable layer is a polylactic acid layer or a cellulose layer; the printing adhesive layer consists of a printing layer and an adhesive layer; the biaxially oriented polylactic acid film is of a three-layer structure and is sequentially provided with a first PLA heat-seal surface layer, a PLA core layer and a second PLA heat-seal surface layer; the transparent barrier coating is a polyester barrier coating. The film has excellent barrier property, mechanical property, heat sealing property and transparency, is a good degradable environment-friendly packaging material, and solves the problem that the traditional barrier packaging film does not have transparency.
Description
Technical Field
The utility model belongs to the technical field of film packaging, and particularly relates to a transparent high-barrier degradable composite film.
Background
Polylactic acid (PLA) is regarded as the biodegradable plastic with the most development prospect due to the outstanding characteristics of good processability, mechanical property, transparency, sufficient source of raw materials, regeneration and the like.
The properties of tensile strength, elongation at break, light transmittance, glossiness and the like of the biaxially oriented polylactic acid (BOPLA) film are greatly improved, and the application of the polylactic acid film in the flexible packaging industry is greatly expanded. However, BOPLA films have relatively low barrier properties compared to conventional plastic films and use in food packaging can reduce the shelf life of the packaged product. Meanwhile, the BOPLA with a single structure has the defects of poor printing composite binding force with the film and the like.
Based on the above, the utility model designs a transparent high-barrier degradable composite film to solve the above problems.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, provides a transparent high-barrier degradable composite film, and solves the problems of undegraded packaging film, poor barrier property, small printing composite fastness and the like in the prior art.
The technical scheme adopted for solving the technical problems is as follows: the transparent high-barrier degradable composite film is provided, and a degradable layer, a printing adhesive layer, a transparent barrier coating and a biaxially oriented polylactic acid film are sequentially arranged from outside to inside;
the degradable layer is a polylactic acid layer or a cellulose layer;
the printing adhesive layer consists of a printing layer and an adhesive layer;
the biaxially oriented polylactic acid film is of a three-layer structure and is sequentially provided with a first PLA heat-seal surface layer, a PLA core layer and a second PLA heat-seal surface layer; wherein the heat sealing strength of the first PLA heat sealing surface layer and the second PLA heat sealing surface layer at 85 ℃ and 135kpa for 1s is more than or equal to 2.0N/15mm.
The transparent barrier coating is a polyester barrier coating.
In a preferred embodiment of the present utility model, the adhesive layer is sequentially composed of a degradable layer, a printing adhesive layer, a transparent barrier coating, a biaxially oriented polylactic acid film, an adhesive layer and a heat sealing layer from outside to inside.
In a preferred embodiment of the present utility model, the printing layer is disposed outside the adhesive layer.
In a preferred embodiment of the present utility model, the printing layer is disposed on the inner side of the adhesive layer.
In a preferred embodiment of the utility model, the degradable layer has a thickness of 10-40 μm.
In a preferred embodiment of the utility model, the thickness of the printed layer is 0.1-2 μm.
In a preferred embodiment of the present utility model, the biaxially oriented polylactic acid film has a thickness of 10 to 150. Mu.m.
In a preferred embodiment of the utility model, the thickness of the adhesive layer is 0.1-2 μm.
In a preferred embodiment of the utility model, the heat-seal layer has a thickness of 10-40 μm.
Compared with the background technology, the technical proposal has the following advantages:
the PLA film or the cellulose film is arranged on the outermost layer of the scheme, and the product information and the patterns can be prevented from being damaged by adopting an inner printing mode; the barrier layer may provide excellent barrier properties, printing properties, and excellent transparency. By arranging three biaxially oriented polylactic acid layers, better mechanical properties are also provided for the film, and the design of the first and second PLA heat-seal surface layers can improve the printing compound fastness. The adhesive layer and the heat sealing layer are added to further provide the mechanical property and the heat sealing property of the film. The film has excellent barrier property, transparency and mechanical property, has good biodegradability, is an environment-friendly transparent barrier packaging material, and has good market application prospect.
Drawings
FIG. 1 is a layer structure diagram of a transparent high barrier degradable composite film of example 2.
The heat-seal layer comprises a 10-degradable layer, a 20-printing layer, a 30-adhesive layer, a 40-transparent barrier layer, a 50-biaxially oriented polylactic acid film, a 51-first PLA heat-seal surface layer, a 52-PLA core layer, a 53-second PLA heat-seal surface layer, a 60-adhesive layer and a 70-heat-seal layer.
Detailed Description
The terms "inner" and "outer" are used with respect to the film as the packaging condition, with "inner" referring to the side closer to the contents and "outer" referring to the side farther from the contents.
A transparent high-barrier degradable composite film, which is sequentially provided with a degradable layer, a printing adhesive layer, a transparent barrier coating and a biaxially oriented polylactic acid film from outside to inside;
when the thickness of the degradable layer is 10-40 mu m, the thickness of the printing layer is 0.1-2 mu m, the thickness of the adhesive layer is 0.1-2 mu m, the thickness of the transparent barrier layer is 0.1-2 mu m, the thickness of the biaxially oriented polylactic acid film is 10-150 mu m, and the heat sealing strength of the first and second PLA heat sealing surface layers at 85 ℃ and 135kpa for 1s is more than or equal to 2.0N/15mm.
When the adhesive layer and the heat-sealing layer are compounded, the thickness of the adhesive layer is 0.1-2 μm, and the thickness of the heat-sealing layer is 10-40 μm.
The cost performance of the film is higher, namely, the thickness of the composite film is as thin as possible on the premise of ensuring the barrier property, the mechanical property, the printing composite fastness and the heat sealing property, so that the production cost is reduced, the film is more economical and practical, and the market demand is met.
Example 1
In this embodiment, a transparent high-barrier degradable composite film is provided with a degradable layer 10, a printing adhesive layer, a transparent barrier coating 40 and a biaxially oriented polylactic acid film 50 in sequence from outside to inside. The degradable layer 10 is a polylactic acid layer; the printing adhesive layer consists of a printing layer 20 and an adhesive layer 30, and the printing layer 20 is arranged on the outer side of the adhesive layer 30; the biaxially oriented polylactic acid film 50 has a three-layer structure and is sequentially provided with a first PLA heat-seal surface layer 51, a PLA core layer 52 and a second PLA heat-seal surface layer 53; the transparent barrier coating 40 is a polyester barrier coating.
Wherein the thickness of the degradable layer 10 is 15 μm, the thickness of the printing layer 20 is 0.5 μm, the thickness of the adhesive layer 30 is 0.5 μm, the thickness of the transparent barrier layer 40 is 1 μm, the thickness of the biaxially oriented polylactic acid film 50 is 25 μm, and the heat seal strength of the first PLA heat seal surface layer 51 and the second PLA heat seal surface layer 53 at 85 ℃ and 135kpa for 1s is 3.2N/15mm.
Example 2
Example 2 differs from example 1 in that: the degradable layer 10 is a cellulose layer; the composite film further includes an adhesive layer 60 and a heat seal layer 70; the thickness of the adhesive layer 60 is 0.5 μm and the thickness of the heat seal layer 70 is 34 μm; the heat seal strength of the heat seal layer 70 was 8.9N/15mm at 85℃and 135kpa for 1 s.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (9)
1. A transparent high-barrier degradable composite film is characterized in that: the degradable layer, the printing adhesive layer, the transparent barrier coating and the biaxially oriented polylactic acid film are sequentially arranged from outside to inside;
the degradable layer is a polylactic acid layer or a cellulose layer;
the printing adhesive layer consists of a printing layer and an adhesive layer;
the biaxially oriented polylactic acid film is of a three-layer structure and is sequentially provided with a first PLA heat-seal surface layer, a PLA core layer and a second PLA heat-seal surface layer;
the transparent barrier coating is a polyester barrier coating.
2. The transparent high barrier degradable composite film of claim 1, wherein: the adhesive consists of a degradable layer, a printing adhesive layer, a transparent barrier coating, a biaxially oriented polylactic acid film, an adhesive layer and a heat sealing layer from outside to inside.
3. The transparent high barrier degradable composite film of claim 1, wherein: the printing layer is arranged on the outer side of the adhesive layer.
4. The transparent high barrier degradable composite film of claim 1, wherein: the printing layer is arranged on the inner side of the adhesive layer.
5. The transparent high barrier degradable composite film of claim 1, wherein: the thickness of the degradable layer is 10-40 μm.
6. The transparent high barrier degradable composite film of claim 1, wherein: the thickness of the printing layer is 0.1-2 mu m.
7. The transparent high barrier degradable composite film of claim 1, wherein: the thickness of the biaxially oriented polylactic acid film is 10-150 mu m.
8. The transparent high barrier degradable composite film of claim 2, wherein: the thickness of the adhesive layer is 0.1-2 μm.
9. The transparent high barrier degradable composite film of claim 2, wherein: the thickness of the heat sealing layer is 10-40 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320736440.8U CN220220019U (en) | 2023-04-06 | 2023-04-06 | Transparent high-barrier degradable composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320736440.8U CN220220019U (en) | 2023-04-06 | 2023-04-06 | Transparent high-barrier degradable composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220220019U true CN220220019U (en) | 2023-12-22 |
Family
ID=89177328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320736440.8U Active CN220220019U (en) | 2023-04-06 | 2023-04-06 | Transparent high-barrier degradable composite film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220220019U (en) |
-
2023
- 2023-04-06 CN CN202320736440.8U patent/CN220220019U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |