CN210526002U - High-temperature-resistant high-barrier polyolefin composite film - Google Patents
High-temperature-resistant high-barrier polyolefin composite film Download PDFInfo
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Abstract
The utility model relates to a high temperature resistant high barrier polyolefin composite film, which comprises a bidirectional stretching base film layer, a high temperature resistant coating arranged on the upper surface of the base film layer and a barrier coating arranged on the lower surface of the base film layer; the base film layer is provided with a corona layer, a middle layer and a heat-resistant layer which are sequentially arranged from top to bottom; the corona layer and the middle layer respectively comprise a high-density polyethylene layer and a linear low-density polyethylene layer, and the high-density polyethylene layers are arranged above the linear low-density polyethylene layers; the heat resistant layer includes a high density polyethylene layer. The utility model discloses a single polyethylene material is as the base film layer, through coating high temperature resistant coating and utilize high density polyethylene layer and linear low density polyethylene layer to form specific interlaminar structure and improve the high temperature resistance of complex film, still utilizes coating separation coating to improve the separation nature, makes the complex film that obtains have high temperature resistance and high separation nature, and comprehensive properties obviously promotes.
Description
Technical Field
The utility model relates to a packaging material technical field, concretely relates to polyolefin composite membrane especially relates to a high temperature resistant high resistant polyolefin composite membrane that separates.
Background
The polyolefin material has the advantages of rich raw materials, low price, easy processing and forming and excellent comprehensive performance, thereby being a polymer material with the largest output and very wide application. Among them, polyethylene is most important.
Polyethylene (PE) is nontoxic and tasteless white powder or granule, is milky white in appearance, has a wax-like hand feeling, and has low water absorption. Polyethylene films have low water permeability but high air permeability and are not suitable for freshness-retaining packaging. Meanwhile, the polyethylene film used in the current market generally has the use temperature not exceeding 100 ℃, and under the long-time illumination condition, the phenomena of color change and the like can occur on the surface of the polyethylene film, the aging of the film is accelerated, the service life is influenced, and the application of the polyethylene film is further greatly limited.
CN204453294U discloses a high-barrier food and drug cold-seal packaging film, which comprises a base layer and a glue coating layer, wherein the glue coating layer comprises a PVDC layer, a PE layer and a cold-seal glue layer; through this technical scheme, be provided with the PVDC layer in the packaging film, set up to the PE layer at the outmost of packaging film, coating cold seal glue on the PE layer, utilize the high performance's on PVDC layer separation effect and the firm adhesion of PE layer and cold seal glue, improved the sealed effect to food and medicine packing greatly, set for the thickness of PE layer and cold seal glue film, make in the combination of PE layer and cold seal glue, reach most appropriate tensile strength and best sealing performance. However, the method has high coating equipment cost, and meanwhile, the polyethylene material which is relatively sensitive to temperature can only be compounded in a cold sealing mode, so that the high temperature resistance of the PE material is not effectively improved.
CN107283980B discloses a high-temperature cooking resistant polyethylene film and a production process thereof. The polyethylene film comprises a corona layer, a middle layer and a heat sealing layer, wherein raw materials of the corona layer, the middle layer and the heat sealing layer respectively and independently comprise metallocene medium-density polyethylene and metallocene high-density polyethylene, and the difference between the Vicat softening point and the melting point of the metallocene medium-density polyethylene and the metallocene high-density polyethylene is not more than 10 ℃. The composite film prepared by the technical scheme does not have good heat resistance and barrier property.
In addition, in order to improve the barrier property and the high temperature resistance of the polyethylene material, the polyethylene and other functional materials are usually compounded to improve the comprehensive performance, but the compounding of different materials is not beneficial to the recovery and the recycling of the composite film.
CN204622735U discloses a high-barrier corrosion-resistant sealant composite packaging film, which is formed by compounding a first heat-seal coating, a first coating base film, a first corrosion-resistant coating, a first adhesive layer, a protective layer, a second adhesive layer, a barrier layer, a third adhesive layer, a second corrosion-resistant coating, a second coating base film and a second heat-seal coating in sequence from outside to inside, wherein the thickness of the composite packaging film is 90-100 mu m. The utility model provides a heat-seal coating of composite packaging membrane positive and negative can realize the heat-seal of front and reverse side, and the anticorrosion coating has good chemical resistance, prevents that the complex film from suffering the corrosivity and destroying, and the protective layer has improved the holistic tensile strength of complex film and puncture resistance ability, and the protection complex film can not receive destruction under the effect of external force, and the barrier layer has guaranteed hindering of material wet and oxygen barrier property ability. Under the interaction of the materials of all layers, the sealing property and the barrier property of the composite film package are ensured, and the shelf life of the sealant product is prolonged. However, the composite film comprises a polypropylene film layer, a polyamide layer, an aluminum foil layer and the like, and is difficult to recycle and not beneficial to recycling.
Therefore, there is a need to develop a novel polyolefin composite film that can satisfy the requirements of high barrier property, high temperature resistance and recycling at the same time.
SUMMERY OF THE UTILITY MODEL
In view of the problem that exists among the prior art, the utility model aims to provide a high temperature resistant high separation polyolefin complex film, the complex film adopts single polyolefin material, makes the complex film that makes through the different functional coatings of coating can satisfy high temperature resistance and high separation nature simultaneously, still has convenient the recovery simultaneously, can recycle, reduces the advantage of abandonment pollution.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a high temperature resistant high separation polyolefin complex film, include: the heat insulation coating comprises a bidirectional stretching base film layer, a high-temperature-resistant coating arranged on the upper surface of the bidirectional stretching base film layer and a barrier coating arranged on the lower surface of the bidirectional stretching base film layer; the bidirectional stretching base film layer is provided with a corona layer, a middle layer and a heat-resistant layer which are sequentially arranged from top to bottom; the corona layer and the middle layer respectively comprise a High Density Polyethylene (HDPE) layer and a Linear Low Density Polyethylene (LLDPE) layer, and the high density polyethylene layers are arranged above the linear low density polyethylene layers; the heat resistant layer includes a high density polyethylene layer.
The utility model discloses a single polyethylene material is as the base film layer, through coating high temperature resistant coating and adopt specific interlaminar structure to improve the high temperature resistance of complex film, has improved separation nature (oxygen barrier property) through coating separation coating again, makes the processability of single polyolefin complex film wider like this, has possessed high temperature resistance and high separation nature simultaneously, and the comprehensive properties obtains improving by a wide margin.
Corona layer and intermediate level in the biaxial stretching base film layer all include high density polyethylene layer and linear low density polyethylene layer to high density polyethylene layer all sets up in linear low density polyethylene layer top, meanwhile, the heat-resistant layer includes high density polyethylene layer.
The utility model adopts the density of 0.95-0.96g/cm3The high-density polyethylene with the melt index of 0.07-0.7g/10min has high molecular weight and low melting, so that the temperature resistance of the surface layer is increased, the fluidity of the surface layer is reduced, the high-temperature stability is obviously improved, and meanwhile, the density of the middle layer is 0.92-0.936g/cm3The melt index is 1-2g/10 min's linear low density polyethylene layer, and linear low density polyethylene layer melts earlier than high density polyethylene layer when being heated, absorbs the heat, reduces the influence of heat to high density polyethylene, and linear low density polyethylene layer after melting improves interlaminar strength with the better integration of high density polyethylene layer ability, consequently, the utility model discloses an above-mentioned specific 12121's structure (1 indicates biaxial stretching's high density polyethylene, 2 indicates biaxial stretching's linear low density polyethylene), is temperature resistant-heat absorption-fuses more organic combination. In addition, after the base material is subjected to biaxial stretching, the molecular orientation of the base material in the transverse direction and the longitudinal direction is changed, the crystallinity is improved, and the temperature resistance of the base film is improved due to the improvement of the overall crystallinity of the base film. And then the high-temperature resistant coating is coated on the base film layer, and the operations obviously improve the high-temperature resistance of the composite film.
The utility model discloses the principal ingredients of well corona layer, intermediate level and heat-resistant layer all are biaxial stretching's polyethylene film, all form through earlier horizontal successive stretching in vertical back. Compared with the polyethylene film produced by the original blow molding or casting method, the polyethylene film has the advantages of greatly improved physical properties, high transparency, good heat sealability and moisture resistance, good longitudinal and transverse tensile strength, moisture resistance, foldability and the like, and the puncture resistance, low-temperature impact strength, pinhole resistance, wear resistance and low-temperature flexibility of the polyethylene film are also obviously improved.
The utility model discloses in "high temperature resistance" means that the polyethylene material can use or process more than 115 ℃, especially in the environment more than 120 ℃, high resistant separates "and means the improvement of polyethylene material oxygen resistance, and oxygen permeability is less than 3cm promptly3/(m2·24h·0.1MPa)。
Preferably, the high temperature resistant coating is a polyurethane coating; the thickness of the high temperature resistant layer is 1 to 5 μm, and may be, for example, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, 2 μm, 2.2 μm, 2.5 μm, 3 μm, 3.5 μm, 3.8 μm, 4 μm, 4.6 μm, or 5 μm.
Preferably, the barrier coating is an acrylic coating; the thickness of the barrier coating is 0.3 to 1 μm, and may be, for example, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1 μm, or the like.
Preferably, the thickness of the biaxially oriented base film layer is 20 to 50 μm, and may be, for example, 20 μm, 25 μm, 30 μm, 32 μm, 35 μm, 40 μm, 42 μm, 45 μm, 48 μm, 50 μm, or the like.
The thickness of the corona layer is 5 to 12.5. mu.m, and may be, for example, 5. mu.m, 6.25. mu.m, 7.5. mu.m, 8. mu.m, 8.75. mu.m, 10. mu.m, 10.5. mu.m, 11.25. mu.m, 12. mu.m, 12.5. mu.m, or the like.
The thickness of the intermediate layer is 10 to 25 μm, and may be, for example, 10 μm, 12.5 μm, 15 μm, 16 μm, 17.5 μm, 20 μm, 21 μm, 22.5 μm, 24 μm, 25 μm, or the like.
The thickness of the heat-resistant layer is 5 to 12.5. mu.m, and may be, for example, 5. mu.m, 6. mu.m, 7.5. mu.m, 8. mu.m, 8.75. mu.m, 10. mu.m, 10.2. mu.m, 11.25. mu.m, 12. mu.m, 12.5. mu.m, or the like.
Preferably, a bottom coating is further arranged on the lower surface of the biaxially oriented base film layer, the bottom coating is arranged between the lower surface of the biaxially oriented base film layer and the barrier coating, and the bottom coating is a polyurethane coating.
Preferably, the primer layer has a thickness of 0.2 to 1.0. mu.m, and may be, for example, 0.2. mu.m, 0.3. mu.m, 0.4. mu.m, 0.5. mu.m, 0.6. mu.m, 0.7. mu.m, 0.8. mu.m, 0.9. mu.m, 1 μm or the like.
The utility model discloses in polyolefin complex film is preferred to include the under coat, because there is not polar group in the polyethylene film layer molecular chain, and material surface adsorption ability is poor, and surface tension is little, causes the separation coating to bond insecurely very easily, adds the under coat and can strengthen the adhesive force of base film layer and separation coating for the structure of complex film is more firm.
Preferably, an adhesive layer is further arranged on the lower surface of the biaxially oriented base film layer, the adhesive layer is arranged on the other surface, far away from the bottom coating, of the barrier coating, and the adhesive coating is a polyurethane coating.
Preferably, the adhesive layer has a thickness of 1 to 5 μm, and may be, for example, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, 2 μm, 2.2 μm, 2.5 μm, 3 μm, 3.5 μm, 3.8 μm, 4 μm, 4.6 μm, or 5 μm.
Preferably, a heat-sealing layer is further arranged on the lower surface of the biaxially oriented base film layer, the heat-sealing layer is arranged on the other surface, far away from the barrier coating, of the adhesive layer, and the heat-sealing layer is a cast or blown polyethylene layer.
Preferably, the thickness of the heat-seal layer is 25 to 120 μm, and may be, for example, 25 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 85 μm, 90 μm, 100 μm, 105 μm, 110 μm, 120 μm, or the like.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
(1) the utility model adopts single polyethylene material as the base film layer, which is convenient to recycle and can be recycled;
(2) the utility model discloses a coating is able to bear or endure high temperature coating and adopt specific "12121" interlaminar structure (1 indicates biaxial stretching's high density polyethylene, 2 indicates biaxial stretching's linear low density polyethylene), make the high temperature resistance of complex film promote apparently jointly, the complex film after the improvement can use under the condition up to 120 ℃; the utility model also utilizes the coating separation coating to improve the separation property (oxygen resistance performance), and the oxygen transmission capacity can be controlled to be 1.25-3cm3/(m2·24h·0.1MPa)。
Drawings
Fig. 1 is a schematic sectional view of a polyolefin composite membrane according to example 1 of the present invention.
Fig. 2 is a schematic cross-sectional view of a base film layer in embodiment 1 of the present invention.
The notation in the figures means: 1: a high temperature resistant coating; 2: a base film layer; 3: a primer layer; 4: a barrier coating; 5: an adhesive layer; 6: a heat seal layer; 21: a corona layer; 22: an intermediate layer; 23: and a heat-resistant layer.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. However, the following examples are only simple examples of the present invention, and do not represent or limit the scope of the present invention, which is defined by the appended claims.
Example 1
In the present embodiment, a polyolefin composite film as shown in fig. 1 is provided, which comprises a high temperature resistant coating 1, a base film layer 2, a primer layer 3, a barrier coating 4, an adhesive layer 5, and a heat seal layer 6, which are sequentially disposed from top to bottom, and the base film layer 2 comprises a corona layer 21, an intermediate layer 22, and a heat resistant layer 23, which are sequentially disposed from top to bottom as shown in fig. 2. Wherein, the high temperature resistant coating 1 is a two-liquid type polyurethane coating, the thickness is 1 μm, the corona layer 21 is formed by co-extruding a two-way stretching HDPE layer and a two-way stretching LLDPE layer, the HDPE layer is positioned above the LLDPE and is 5 μm in thickness, the middle layer 22 is formed by co-extruding a two-way stretching HDPE layer and a two-way stretching LLDPE layer, the HDPE layer is positioned above the LLDPE and is 10 μm in thickness, the heat-resistant layer 23 is a two-way stretching HDPE layer and is 5 μm in thickness, the priming coat 3 is a water-soluble polyurethane coating and is 0.6 μm in thickness, the barrier coating 4 is an acrylic acid coating and is 0.5 μm in thickness, the adhesive layer 5 is a two-component polyurethane coating and is 2 μm in thickness, and the heat-sealing layer 6 is a cast polyethylene layer and is 50.
Example 2
The embodiment provides a polyolefin composite film, which consists of a high-temperature-resistant coating, a base film layer, a bottom coating, a barrier coating, an adhesive layer and a heat-sealing layer which are sequentially arranged from top to bottom, wherein the base film layer consists of a corona layer, a middle layer and a heat-resistant layer from top to bottom. Wherein, high temperature resistant coating is biliquid type polyurethane coating, thickness is 3 μm, the corona layer is co-extruded for biaxial stretching's HDPE layer and biaxial stretching's LLDPE layer and forms, the HDPE layer is located LLDPE top, thickness is 8 μm, the intermediate level is co-extruded for biaxial stretching's HDPE layer and biaxial stretching's LLDPE layer and forms, the HDPE layer is located LLDPE top, thickness is 16 μm, heat-resistant layer is biaxial stretching's HDPE layer, thickness is 8 μm, the priming coat is water-soluble polyurethane coating, thickness is 0.8 μm, the separation coating is the acrylic acid coating, thickness is 1 μm, gluing agent layer is two ingredient polyurethane coating, thickness is 3 μm, the heat-seal layer is the curtain coating polyethylene layer, thickness is 80 μm.
Example 3
The embodiment provides a polyolefin composite film, which consists of a high-temperature-resistant coating, a base film layer, a bottom coating, a barrier coating, an adhesive layer and a heat-sealing layer which are sequentially arranged from top to bottom, wherein the base film layer consists of a corona layer, a middle layer and a heat-resistant layer from top to bottom. Wherein, the high temperature resistant coating is a biliquid polyurethane coating, the thickness is 5 μm, the corona layer is the coextrusion layer on biaxially oriented HDPE layer and biaxially oriented LLDPE layer, the HDPE level is located LLDPE top, the thickness is 12.5 μm, the intermediate level is the coextrusion layer on biaxially oriented HDPE layer and biaxially oriented LLDPE layer, the HDPE level is located LLDPE top, the thickness is 25 μm, the heat-resistant layer is the biaxially oriented HDPE layer, the thickness is 12.5 μm, the priming coat is a water-soluble polyurethane coating, the thickness is 0.4 μm, the separation coating is an acrylic acid coating, the thickness is 0.3 μm, the adhesive layer is a two-component polyurethane coating, the thickness is 5 μm, the heat-seal layer is a cast polyethylene layer, the thickness is 100 μm.
Example 4
The embodiment provides a polyolefin composite film, which consists of a high-temperature-resistant coating, a base film layer and a barrier coating which are sequentially arranged from top to bottom, wherein the base film layer consists of a corona layer, a middle layer and a heat-resistant layer from top to bottom. Wherein, high temperature resistant coating is biliquid type polyurethane coating, thickness is 3 μm, the corona layer is the crowded layer altogether of biaxial stretching's HDPE layer and biaxial stretching's LLDPE layer, the HDPE level is located LLDPE top, thickness is 8 μm, the intermediate level is the crowded layer altogether of biaxial stretching's HDPE layer and biaxial stretching's LLDPE layer, the HDPE level is located LLDPE top, thickness is 16 μm, heat-resistant layer is biaxial stretching's HDPE layer, thickness is 8 μm, the separation coating is acrylic acid coating, thickness is 0.6 μm.
Comparative example 1
This comparative example provides a polyolefin composite film having only a base film layer composed of a cast PE layer.
Comparative example 2
This comparative example provides a polyolefin composite film differing from example 1 only in that the base film layer was replaced with a cast PE layer.
Comparative example 3
This comparative example provides a polyolefin composite film differing from example 1 only in that the corona layer is only a biaxially stretched HDPE layer and the intermediate layer is only a biaxially stretched LLDPE layer.
Performance testing
(1) Oxygen transmission amount: GB/T19789-;
(2) high temperature resistance: and (3) testing by adopting a five-point heat sealing instrument, and observing the appearance change of the heat-sealing film surface, wherein the heat-sealing time is 0.5s, the heat-sealing pressure is 0.2MPa, and the heat-sealing temperature is 90-140 ℃.
The results of the oxygen transmission amount and high temperature resistance tests of examples 1 to 4 and comparative examples 1 to 2 are shown in table 1:
TABLE 1
| Sample (I) | Oxygen transmission capacity cm3/(m2·24h·0.1MPa) | Maximum use temperature/. degree.C |
| Example 1 | 2.43 | 122 |
| Example 2 | 1.25 | 128 |
| Example 3 | 2.96 | 134 |
| Example 4 | 2.51 | 126 |
| Comparative example 1 | 1200 | 100 |
| Comparative example 2 | 2.76 | 108 |
| Comparative example 3 | 2.52 | 116 |
As can be seen from examples 1-4 and performance tests, the polyolefin composite membrane obtained by the utility model can be used at the temperature of 120 ℃; meanwhile, the oxygen transmission capacity can be as low as 1-3cm3/(m224h 0.1MPa) and has excellent high temperature resistance and high barrier property.
Comparing examples 1-4 with comparative example 1, it can be seen that the cast polyethylene film in comparative example 1 has an oxygen transmission rate of 1200cm3/(m224h 0.1MPa), whereas the oxygen transmission of the composite membranes in examples 1-4 can be as low as 1-3cm3/(m224h 0.1MPa), the oxygen barrier performance is greatly improved.
Comparing examples 1-4 with comparative example 1, it can be seen that the cast polyethylene film of comparative example 1 has poor high temperature resistance and cannot be used at 100 ℃ or higher, while the composite films of examples 1-4 can be used at 120 ℃ and have significantly improved high temperature resistance.
As can be seen from comparative example 1 and comparative examples 2 to 3, the present invention provides a specific interlayer structure using HDPE and LLDPE, and a composite film having such a specific interlayer structure can be used at 120 ℃ and has a significantly higher high temperature resistance than a composite film having no such structure.
Will the utility model discloses a when the complex film is arranged in actual system bag production, the required heat of heat-seal layer PE is through the transmission of heat transfer from outside to inside, when the heat-seal layer thickness is higher, the PE inter-lamination junction temperature need be greater than 110 ℃ and just can reach better melting effect in the base film layer, and the temperature that the complex film skin bore this moment generally exceeds 120 ℃, the utility model discloses a composite construction of adjustment base film layer and through coating high temperature resistant coating on the base film layer can improve 10-20 ℃ with the compound film high temperature resistance, solved the appearance defects that the complex film brought because of surface melting.
The applicant states that the present invention is described by the above embodiments, but the present invention is not limited to the above detailed structural features, i.e. the present invention can be implemented only by relying on the above detailed structural features. It should be clear to those skilled in the art that any modifications to the present invention, to the equivalent replacement of selected parts and the addition of auxiliary parts, the selection of specific modes, etc., all fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. A high temperature resistant high barrier polyolefin composite film, comprising: the heat insulation coating comprises a bidirectional stretching base film layer, a high-temperature-resistant coating arranged on the upper surface of the bidirectional stretching base film layer and a barrier coating arranged on the lower surface of the bidirectional stretching base film layer;
the bidirectional stretching base film layer is provided with a corona layer, a middle layer and a heat-resistant layer which are sequentially arranged from top to bottom;
the corona layer and the middle layer respectively comprise a high-density polyethylene layer and a linear low-density polyethylene layer, and the high-density polyethylene layers are arranged above the linear low-density polyethylene layers; the heat resistant layer includes a high density polyethylene layer.
2. The high temperature resistant high barrier polyolefin composite film according to claim 1, wherein the high temperature resistant coating is a polyurethane coating;
the thickness of the polyurethane coating is 1-5 μm.
3. The high temperature resistant high barrier polyolefin composite film according to claim 1, wherein the barrier coating is an acrylic coating;
the thickness of the barrier coating is 0.3-1.0 μm.
4. The high temperature resistant high barrier polyolefin composite film according to claim 1, wherein the thickness of the biaxially oriented base film layer is 20 to 50 μm;
the thickness of the corona layer is 5-12.5 μm; the thickness of the intermediate layer is 10-25 μm; the thickness of the heat-resistant layer is 5-12.5 μm.
5. The high temperature resistant high barrier polyolefin composite film according to claim 1, wherein a primer layer is further provided on the lower surface of the biaxially oriented base film layer;
the primer layer is disposed between the biaxially oriented base film layer and the barrier coating;
the base coat is a polyurethane coating.
6. The high temperature resistant high barrier polyolefin composite film according to claim 5, wherein the thickness of the primer layer is 0.2 to 1.0 μm.
7. The high-temperature-resistant high-barrier polyolefin composite film according to claim 5, wherein an adhesive layer is further arranged on the lower surface of the biaxially oriented base film layer;
the adhesive layer is arranged on the other surface, far away from the bottom coating, of the barrier coating;
the adhesive coating is a polyurethane coating.
8. The high temperature resistant and high barrier polyolefin composite film according to claim 7, wherein the adhesive layer has a thickness of 1 to 5 μm.
9. The high temperature and high barrier polyolefin composite film according to claim 7, wherein a heat sealing layer is further disposed on the lower surface of the biaxially oriented base film layer;
the heat sealing layer is arranged on the other surface, far away from the barrier coating, of the adhesive layer;
the heat sealing layer is a cast or blow molding polyethylene layer.
10. The high temperature resistant high barrier polyolefin composite film according to claim 9, wherein the thickness of the heat seal layer is 25-120 μm.
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| CN112060726A (en) * | 2020-09-11 | 2020-12-11 | 北京化工大学常州先进材料研究院 | High-barrier high-temperature-resistant PE heat-sealing film |
| CN112571908A (en) * | 2020-12-15 | 2021-03-30 | 江阴升辉包装材料有限公司 | Electronic crosslinking enhanced PE film and preparation method thereof |
| CN112959774A (en) * | 2021-03-29 | 2021-06-15 | 江阴诚公转印包装材料有限公司 | High-barrier microwave special packaging film and preparation method thereof |
| CN113147141A (en) * | 2021-05-19 | 2021-07-23 | 上海紫江彩印包装有限公司 | Polyolefin environment-friendly packaging film and preparation method and application thereof |
| CN113650955A (en) * | 2021-08-23 | 2021-11-16 | 无锡市新浩保护膜有限公司 | Continuous automatic sealing and packaging film and production method and packaging method thereof |
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| CN112060726A (en) * | 2020-09-11 | 2020-12-11 | 北京化工大学常州先进材料研究院 | High-barrier high-temperature-resistant PE heat-sealing film |
| CN112571908A (en) * | 2020-12-15 | 2021-03-30 | 江阴升辉包装材料有限公司 | Electronic crosslinking enhanced PE film and preparation method thereof |
| CN112959774A (en) * | 2021-03-29 | 2021-06-15 | 江阴诚公转印包装材料有限公司 | High-barrier microwave special packaging film and preparation method thereof |
| CN113147141A (en) * | 2021-05-19 | 2021-07-23 | 上海紫江彩印包装有限公司 | Polyolefin environment-friendly packaging film and preparation method and application thereof |
| CN113650955A (en) * | 2021-08-23 | 2021-11-16 | 无锡市新浩保护膜有限公司 | Continuous automatic sealing and packaging film and production method and packaging method thereof |
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| JP2023042595A (en) * | 2021-09-03 | 2023-03-27 | 凸版印刷株式会社 | Laminate, packaging body, and packaging article |
| CN113858735B (en) * | 2021-09-03 | 2023-08-29 | 广东佳鑫包装科技有限公司 | Coating high-barrier PE material |
| JP7343067B2 (en) | 2021-09-03 | 2023-09-12 | 凸版印刷株式会社 | Laminates, packages and packaged articles |
| JP7343062B2 (en) | 2021-09-03 | 2023-09-12 | 凸版印刷株式会社 | Laminates, packages and packaged articles |
| JP7343065B2 (en) | 2021-09-03 | 2023-09-12 | 凸版印刷株式会社 | Laminates, packages and packaged articles |
| JP7343066B2 (en) | 2021-09-03 | 2023-09-12 | 凸版印刷株式会社 | Laminates, packages and packaged articles |
| JP7343064B2 (en) | 2021-09-03 | 2023-09-12 | 凸版印刷株式会社 | Laminates, packages and packaged articles |
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Effective date of registration: 20200924 Address after: 243000 workshop 2 and 4, Chengdu Machinery and electronics Pioneer Park, Lianhe Road, zhengpugang New District, Ma'anshan City, Anhui Province Patentee after: Anhui Zijiang Composite Technology Co., Ltd Address before: 201108 Shanghai city Minhang District Zhuan Hing Road No. 888 Patentee before: SHANGHAI ZIJIANG COLOUR PRINTING & PACKAGING Co.,Ltd. |