CN221212999U - PA-PE co-extrusion high-transparency film - Google Patents
PA-PE co-extrusion high-transparency film Download PDFInfo
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- CN221212999U CN221212999U CN202323185684.0U CN202323185684U CN221212999U CN 221212999 U CN221212999 U CN 221212999U CN 202323185684 U CN202323185684 U CN 202323185684U CN 221212999 U CN221212999 U CN 221212999U
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- 238000001125 extrusion Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 199
- 239000004698 Polyethylene Substances 0.000 claims abstract description 89
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 15
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims abstract description 15
- -1 polyethylene Polymers 0.000 claims abstract description 14
- 229920000573 polyethylene Polymers 0.000 claims abstract description 14
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 13
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 13
- 239000012790 adhesive layer Substances 0.000 claims abstract description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract 3
- 101000614988 Homo sapiens Mediator of RNA polymerase II transcription subunit 12 Proteins 0.000 claims abstract 3
- 102100021070 Mediator of RNA polymerase II transcription subunit 12 Human genes 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 21
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 229920006280 packaging film Polymers 0.000 description 5
- 239000012785 packaging film Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000233805 Phoenix Species 0.000 description 3
- 235000010659 Phoenix dactylifera Nutrition 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 239000004682 Homopolymer nylon Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to a PA-PE co-extrusion high transparent film, which is characterized in that: the PE heat-sealing layer comprises a heat-sealing layer, a plurality of PE layers and a plurality of PA layers, wherein each PA layer, each PE layer and the heat-sealing layer are formed by extrusion and are sequentially arranged from top to bottom, and the upper and lower adjacent PA layers, the lowermost PA layer and the uppermost PE layer are respectively bonded through an adhesive layer; the PA layer is a HOPA layer, the PE layer is a LDPE layer, the heat sealing layer is a ULDPE layer, and the bonding layer is a modified polyethylene layer. The PA-PE co-extruded high-transparency film not only has high transparency, but also has very good stretch forming effect.
Description
Technical Field
The utility model relates to a layered product, in particular to a PA-PE co-extrusion high-transparency film.
Background
The fruit types in the africa area are very few, and the date palm is the fruit which is locally produced and is the most popular fruit locally. In order to ensure that customers can clearly select from a plurality of packages, the date palm packaging film is required to meet the requirements of high enough transparency, good antifogging property, good displaying property and good stretch forming effect. Many packaging films are not available on the market today to meet these requirements simultaneously. At present, the date palm packaging film has a 70% occupancy rate of manufacturers at home and a 30% occupancy rate of other countries, and the transparency of the packaging film in many countries cannot reach the local level, so that only a very small market share can be found. Therefore, there is a need for structural improvements in the packaging films of the prior art to increase their clarity and stretch-forming effect.
Disclosure of utility model
The technical problem to be solved by the utility model is to provide the PA-PE co-extrusion high-transparency film, which has high transparency and very good stretch forming effect. The technical scheme adopted is as follows:
A PA-PE co-extrusion high transparent film is characterized in that: the PE heat-sealing layer comprises a heat-sealing layer, a plurality of PE layers and a plurality of PA layers, wherein each PA layer, each PE layer and the heat-sealing layer are formed by extrusion and are sequentially arranged from top to bottom, and the upper and lower adjacent PA layers, the lowermost PA layer and the uppermost PE layer are respectively bonded through an adhesive layer; the PA layer is a HOPA layer, the PE layer is a LDPE layer, the heat sealing layer is a ULDPE layer, and the bonding layer is a modified polyethylene layer.
In the structure of the PA-PE co-extrusion high-transparency film, the uppermost PA layer is used as the surface layer of the film product, the PA layer is a HOPA layer, and is made of a homo-nylon (HOPA) material with the melting point of 220 ℃, so that the temperature resistance of the surface layer of the film product can be greatly improved, and meanwhile, the glossiness of the outer layer of the film product is ensured; other PA layers are also made of homo-polymer nylon (HOPA) materials with the melting point of 220 ℃, can provide certain barrier performance for the film product, play a role in supporting bridge columns, and ensure that the film product has a very good stretch forming effect; each PE layer is an LDPE layer, and adopts a Low Density Polyethylene (LDPE) material of pure MI2, so that the film product can obtain high transparency; the bonding layer can form good bearing effect between two adjacent PA layers and between the PA layer and the PE layer, and the bonding layer adopts modified polyethylene material, so that the PA layer and the PP layer can be well bonded, the integrity of the film product is improved, and meanwhile, the transparency of the film product is improved; the heat-seal layer is a ULDPE layer, which is made of Ultra Low Density Polyethylene (ULDPE) material, and can provide low-temperature heat-seal performance for the film product and improve the transparency of the film product.
As a preferable scheme of the utility model, the modified polyethylene layer adopts a maleic anhydride modified polyethylene material. The maleic anhydride modified polyethylene layer is made of maleic anhydride modified polyethylene material, so that the PA layer and the PP layer can be bonded more, the integrity of the film product is improved, and the transparency of the film product is further improved.
As a preferable scheme of the utility model, the number of the PA layers is 3, namely a first PA layer, a second PA layer and a third PA layer; the number of the PE layers is 4, and the PE layers are respectively a first PE layer, a second PE layer, a third PE layer and a fourth PE layer; the heat seal layer is sequentially arranged from top to bottom, the first PA layer is bonded with the second PA layer through the first bonding layer, the second PA layer is bonded with the third PA layer through the second bonding layer, and the third PA layer is bonded with the first PE layer through the third bonding layer. The PA-PE co-extrusion high-transparency film is formed by laminating eleven layers of materials, wherein a first PA layer is used as a surface layer of a film product, a second PA layer and a third PA layer can play a role of 'bridge column' support, and the film product is ensured to have a very good stretch forming effect; the first PE layer, the second PE layer, the third PE layer and the fourth PE layer are all LDPE layers, so that the film product can obtain higher transparency; the first bonding layer can be well bonded with the first PA layer and the second PA layer, the second bonding layer can be well bonded with the second PA layer and the third PA layer, the third bonding layer can be well bonded with the third PA layer and the first PE layer, and the integrity and transparency of the film product are improved.
The PA-PE co-extruded high-transparency film can be produced by a down-blowing water cooling process after the interlayer structure design is finished, and the film product is rapidly cooled from 250 ℃ to normal temperature by utilizing the advantages of the water cooling process, so that the crystallinity of the film product is reduced, the transparency of the film product is improved, and the film product has a very good stretch forming effect.
Compared with the prior art, the utility model has the following advantages:
The PA-PE co-extrusion high-transparency film is formed by stacking a plurality of PA layers, a plurality of PE layers and ULDPE layers which are sequentially arranged from top to bottom, wherein the uppermost PA layer is used as a surface layer, and a homo-nylon (HOPA) material with the melting point of 220 ℃ is adopted, so that the transparency and the glossiness of a film product can be improved; the other PA layers also adopt HOPA with the melting point of 220 ℃, can provide certain barrier property for the film product, play a role in supporting bridge columns, and ensure that the film product has very good stretch forming effect; the bonding layer well bonds the PA layer and the PE layer, so that the integrity of the film product is ensured; the heat-seal layer is a ULDPE layer, which uses ULDPE (ultra low density polyethylene) material, and can provide low temperature heat-seal performance to the film product and improve the transparency of the film product.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of the present utility model.
Detailed Description
As shown in fig. 1, the PA-PE co-extrusion high transparent film comprises a first PA layer 1, a second PA layer 2, a third PA layer 3, a first PE layer 4, a second PE layer 5, a third PE layer 6, a fourth PE layer 7 and a heat sealing layer 8, wherein the first PA layer 1, the second PA layer 2, the third PA layer 3, the first PE layer 4, the second PE layer 5, the third PE layer 6, the fourth PE layer 7 and the heat sealing layer 8 are all extruded and are sequentially arranged from top to bottom, the first PA layer 1 and the second PA layer 2 are bonded through a first bonding layer 9, the second PA layer 2 and the third PA layer 3 are bonded through a second bonding layer 10, and the third PA layer 3 and the first PE layer 4 are bonded through a third bonding layer 11; the first PA layer 1, the second PA layer 2 and the third PA layer 3 are all HOPA layers, the first PE layer 4, the second PE layer 5, the third PE layer 6 and the fourth PE layer 7 are all LDPE layers, the heat sealing layer 8 is an ULDPE layer, and the first bonding layer 9, the second bonding layer 10 and the third bonding layer 11 are all modified polyethylene layers.
In this example, the modified polyethylene layer is a maleic anhydride modified polyethylene material.
The PA-PE co-extrusion high-transparency film is formed by laminating eleven layers of materials, wherein a first PA layer 1 is used as the surface layer of a film product, a first PA layer 1 is a HOPA layer, and a homo-nylon (HOPA) material with the melting point of 220 ℃ is adopted, so that the temperature resistance of the surface layer of the film product can be greatly improved, and meanwhile, the external glossiness of the film product is ensured; the second PA layer 2 and the third PA layer 3 are both HOPA layers, and are made of homo-polymer nylon (HOPA) materials with the melting point of 220 ℃, so that a certain barrier property can be provided for the film product, a bridge column supporting effect is achieved, and the film product is ensured to have a very good stretch forming effect; the first PE layer 4, the second PE layer 5, the third PE layer 6 and the fourth PE layer 7 are all LDPE layers, and a pure MI2 low-density polyethylene (LDPE) material is adopted, so that the film product can obtain higher transparency; the first bonding layer 9, the second bonding layer 10 and the third bonding layer 11 are made of maleic anhydride modified polyethylene materials, the first bonding layer 9 can well bond the first PA layer 1 and the second PA layer 2, the second bonding layer 10 can well bond the second PA layer 2 and the third PA layer 3, and the third bonding layer 11 can well bond the third PA layer 3 and the first PE layer 4, so that the integrity of the film product is improved, and meanwhile, the transparency of the film product is improved; the heat-seal layer 8 is an ULDPE layer, which is made of ultra-low density polyethylene material, and can provide low-temperature heat-seal performance for the film product and improve the transparency of the film product.
The PA-PE co-extruded high-transparency film can be produced by a down-blowing water cooling process after the interlayer structure design is finished, and the film product is rapidly cooled from 250 ℃ to normal temperature by utilizing the advantages of the water cooling process, so that the crystallinity of the film product is reduced, the transparency of the film product is improved, and the film product has a very good stretch forming effect.
In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present utility model are included in the protection scope of the present utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.
Claims (6)
1. A PA-PE co-extrusion high transparent film is characterized in that: the PE heat-sealing layer comprises a heat-sealing layer, a plurality of PE layers and a plurality of PA layers, wherein each PA layer, each PE layer and the heat-sealing layer are formed by extrusion and are sequentially arranged from top to bottom, and the upper and lower adjacent PA layers, the lowermost PA layer and the uppermost PE layer are respectively bonded through an adhesive layer; the PA layer is a HOPA layer, the PE layer is a LDPE layer, the heat sealing layer is a ULDPE layer, and the bonding layer is a modified polyethylene layer.
2. The PA-PE co-extruded high clarity film of claim 1, wherein: the modified polyethylene layer is made of maleic anhydride modified polyethylene material.
3. The PA-PE co-extruded high clarity film of claim 1, wherein: the HOPA layer is made of a homopolymerized nylon material.
4. The PA-PE co-extruded high clarity film of claim 1, wherein: the LDPE layer is made of a low-density polyethylene material.
5. The PA-PE co-extruded high clarity film of claim 1, wherein: the ULDPE layer is made of ultra-low density polyethylene material.
6. The PA-PE co-extruded high clarity film according to any of claims 1-5, characterized in that: the number of the PA layers is 3, and the PA layers are respectively a first PA layer, a second PA layer and a third PA layer; the number of the PE layers is 4, and the PE layers are respectively a first PE layer, a second PE layer, a third PE layer and a fourth PE layer; the heat seal layer is sequentially arranged from top to bottom, the first PA layer is bonded with the second PA layer through the first bonding layer, the second PA layer is bonded with the third PA layer through the second bonding layer, and the third PA layer is bonded with the first PE layer through the third bonding layer.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221212999U true CN221212999U (en) | 2024-06-25 |
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