CN210553438U - Aluminum-plastic composite film with high deep drawing forming performance - Google Patents
Aluminum-plastic composite film with high deep drawing forming performance Download PDFInfo
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- CN210553438U CN210553438U CN201822237149.8U CN201822237149U CN210553438U CN 210553438 U CN210553438 U CN 210553438U CN 201822237149 U CN201822237149 U CN 201822237149U CN 210553438 U CN210553438 U CN 210553438U
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Abstract
The utility model discloses a high deep-drawing forming performance aluminum-plastic composite film. The high-deep-drawing forming-performance aluminum-plastic composite film sequentially comprises a modified nylon film or a modified polyester film outer protective layer, an outer glue layer, an outer chromium-free anticorrosive layer, an aluminum foil, an inner chromium-free anticorrosive layer, an inner glue layer and an inner heat-sealing layer. The utility model discloses a high deep-drawing formability plastic-aluminum complex film can improve the deep-drawing formability of complex film through its multilayer composite structure.
Description
Technical Field
The utility model relates to a soft packet of plastic-aluminum complex film technical field of power battery especially relates to a high deep-drawing forming performance plastic-aluminum complex film.
Background
The soft package lithium ion battery is widely applied to electronic products, the market is further expanded along with the rapid development of the new energy automobile industry, and the soft package lithium ion battery has obvious advantages in the aspect of energy density.
The forming performance is one of the most important performances of the soft-package aluminum-plastic composite film, and at present, products with an outer layer of a nylon film are generally considered to be better in the commercially available products, and products with an outer layer of a polyester film are poorer.
The main flow structure of the aluminum-plastic composite film adopted by the existing soft package lithium ion battery packaging is generally an outer protective layer (nylon or polyester film) + an aluminum foil layer (single-side or double-side is subjected to antiseptic treatment) + an inner heat sealing layer (generally polyolefin material).
Wherein, the outer protective layer has great influence on the forming performance of the aluminum-plastic composite film. The outer protective layer has certain tensile strength and elongation which are necessary conditions for ensuring the forming performance of the aluminum-plastic composite film. It has been an important issue in the industry to maximize the elongation at break of nylon (or mylar) while maintaining the strength of the nylon within a certain range.
In order to improve the drawing depth of the composite film, various aluminum-plastic composite film manufacturers have developed various techniques, such as using blown nylon with more balanced mechanical properties, or coating a slip agent on the surface of the aluminum-plastic film to increase the slip during molding. In general, in order to improve the deep drawing forming performance of the aluminum-plastic composite film in the prior art, the following methods are mainly adopted: nylon and other materials with higher strength and elongation at break are adopted; adopting a blown film with relatively balanced mechanical properties in all directions; the film material with more uniform mechanical property is obtained by controlling the process parameters such as the stretching ratio of the nylon or polyester film or material modification; slip compensation is increased by applying a slip coating to the outer protective layer.
All of the above methods are still insufficient. First, nylon materials, whether biaxially oriented or blow molded, can achieve better moldability, but nylon is prone to moisture absorption, has large variation in performance under different environments, and the elongation properties of nylon itself cannot meet more severe molding conditions (such as cylindrical batteries or double-pit deep drawing). The coating slipping agent is easy to adhere to a forming die to cause pollution and the like when being added.
SUMMERY OF THE UTILITY MODEL
In view of the defects existing in the prior art, the utility model aims to provide a high deep-drawing forming performance aluminum-plastic composite film, which can improve the deep-drawing forming performance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the aluminum-plastic composite film with high deep-drawing forming performance sequentially comprises a modified nylon film or a modified polyester film outer protective layer, an outer glue layer, an outer chromium-free anticorrosive layer, an aluminum foil, an inner chromium-free anticorrosive layer, an inner glue layer and an inner heat-sealing layer.
In the above aluminum-plastic composite film with high deep drawing forming performance, preferably, the outer protective layer of the modified nylon film or the modified polyester film is a layered structure formed by cross-mixing of a polyrotaxane module unit and a nylon module unit or a polyester module unit.
In the aluminum-plastic composite film with high deep drawing forming performance, preferably, the polyrotaxane module unit accounts for 0.5-10% of the total mass of the nylon module unit or the polyester module unit and the polyrotaxane module unit.
In the above aluminum-plastic composite film with high deep drawing forming performance, preferably, the thickness of the outer protective layer of the modified nylon film or the modified polyester film is 5-50 μm.
In the above aluminum-plastic composite film with high deep drawing performance, preferably, the thickness of the outer glue layer is 0.5-10 μm.
In the above aluminum-plastic composite film with high deep drawing performance, preferably, the thickness of the inner glue layer is 0.5-10 μm.
In the above aluminum-plastic composite film with high deep drawing property, preferably, the thickness of the aluminum foil is 10 to 80 μm.
In the above aluminum-plastic composite film with high deep drawing property, preferably, the thickness of the inner heat-sealing layer is 10 to 200 μm.
The utility model discloses an outstanding effect does:
the utility model discloses a high deep-drawing formability plastic-aluminum complex film can improve the deep-drawing formability of complex film through its multilayer composite structure.
Drawings
Fig. 1 is a schematic structural diagram of an aluminum-plastic composite film with high deep drawing forming performance according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
One embodiment provides a high-deep-drawing forming-performance aluminum-plastic composite film, which sequentially comprises a modified nylon film or a modified polyester film outer protective layer, an outer glue layer, an outer chromium-free anticorrosive layer, an aluminum foil, an inner chromium-free anticorrosive layer, an inner glue layer and an inner heat-sealing layer.
The utility model discloses an among all concrete implementation manners, modified nylon membrane or the outer protective layer of modified polyester film are by the alternately laminated structure who mixes formation of polyrotaxane modular unit and nylon modular unit or polyester modular unit. The cross mixing is a mixing mode which is uniform or tends to be evenly distributed, the polyrotaxane module units and the nylon module units or the polyester module units are alternately connected, obvious boundaries exist, and two sides of all the boundaries are different module units. The outer protective layer of the modified nylon film or the modified polyester film can improve the strength and the elongation of the nylon film or the polyester film, namely the elongation at break can be improved by 5-10 times while a certain strength range is ensured, thereby greatly improving the deep punching forming performance of the aluminum-plastic composite film.
In a further embodiment, the polyrotaxane modular unit accounts for 0.5% -10% of the total mass of the nylon modular unit or the polyester modular unit and the polyrotaxane modular unit; preferably 1% to 6%. The thickness of the outer protective layer of the modified nylon film or the modified polyester film is 5-50 μm; preferably 10-30 μm.
In a further embodiment, the outer glue layer has a thickness of 0.5-10 μm; preferably 1-6 μm. The two surfaces of the outer glue layer are respectively attached with the outer protective layer of the modified nylon film or the modified polyester film and the aluminum foil, and the deep-drawing forming performance is greatly influenced. The main factors influencing the deep drawing forming performance are the adhesive force and the elastic rate of the glue layer and the self extending performance. After the glue adopted by the outer glue layer is cured, the outer glue layer has high adhesive force of 4-12N/15mm and self elasticity rate of 3-70GPa, and can be extended by more than 40%.
In all the specific embodiments of the utility model, the outer layer chromium-free anticorrosive layer mainly has the function of preventing the electrolyte from polluting the outer layer or influencing the laminating performance of the outer layer under the electrolyte atmosphere; it is a complete chromate free treatment. The inner chromium-free anticorrosive layer is completely subjected to chromium-free treatment. The inner layer of the aluminum-plastic composite film needs to wrap the lithium ion battery core for a long time and is soaked in the electrolyte for a long time (2-10 years), so in order to keep the long-term electrolyte resistance of the aluminum-plastic composite film, the inner layer needs to be subjected to anticorrosion treatment, and the inner layer is provided with a chromium-free anticorrosion layer.
In a further embodiment, the inner glue layer has a thickness of 0.5-10 μm; preferably 1-6 μm. Two layers of the layer are respectively attached to the inner heat sealing layer and the aluminum foil, and long-term electrolyte resistance is required while the attaching strength is guaranteed. The inner glue layer is formed by polyolefin glue.
In a further embodiment, the aluminum foil has a thickness of 10 to 80 μm; preferably 20-50 μm. The aluminum foil mainly plays a role in blocking moisture in the aluminum-plastic composite film. In order to improve the deep drawing forming performance of the aluminum-plastic composite film, the aluminum foil is 8000 series or 1000 series soft (O state) aluminum foil.
In a further embodiment, the thickness of the inner heat-seal layer is 10 to 200 μm; preferably 20-100. mu.m. The layer is a molten packaging layer used in battery packaging, and a cast polyolefin material is used.
The above embodiments of the present invention are all described in a progressive manner, each of the embodiments is mainly described as different from other embodiments, and the same and similar parts between the embodiments are referred to each other.
Example 1
As shown in fig. 1, the present embodiment provides a high deep-drawing forming performance aluminum-plastic composite film, which sequentially comprises an outer protective layer 1 of a modified nylon film or a modified polyester film, an outer glue layer 2, an outer chromium-free anticorrosive layer 3, an aluminum foil 4, an inner chromium-free anticorrosive layer 5, an inner glue layer 6 and an inner heat-sealing layer 7. The outer protective layer 1 of the modified nylon film or the modified polyester film is a layered structure formed by cross mixing of a polyrotaxane module unit and a nylon module unit or a polyester module unit. The polyrotaxane module unit accounts for 0.5 percent of the total mass of the nylon module unit or the polyester module unit and the polyrotaxane module unit.
The thickness of the outer protective layer 1 of the modified nylon film or the modified polyester film is 5 μm.
The thickness of the outer glue layer 2 was 0.5 μm.
The inner glue layer 6 was 0.5 μm thick.
The thickness of the aluminum foil 4 was 10 μm.
The thickness of the inner heat-seal layer 7 was 10 μm.
The aluminum-plastic composite film with high deep drawing forming performance of the embodiment is prepared by the following steps:
respectively granulating polyrotaxane and nylon (or polyester raw materials), mixing, blowing or stretching to prepare a film, and rolling; obtaining the outer protective layer 1 of the modified nylon film or the modified polyester film.
An outer layer chromium-free anticorrosive layer 3 and an inner layer chromium-free anticorrosive layer 5 are coated on both sides of a 8000 series (or 1000 series) soft (O state) aluminum foil 4.
Coating an outer glue layer 2 (the adopted glue has high adhesive force of 4-12N/15mm and self elasticity rate of 3-70GPa after being cured, and can be extended by more than 40 percent) on the other surface of the outer chromium-free anticorrosive layer 3, and then attaching a modified nylon film or a modified polyester film outer protective layer 1; and coating an inner glue layer 6 (adopting conventional polyolefin glue) on the other surface of the inner chromium-free anticorrosive layer 5, and attaching an inner heat-sealing layer 7 (a heat-sealing CPP film, a cast polyolefin material) after drying.
And obtaining the finished product of the aluminum-plastic composite film with high deep drawing forming performance after curing treatment.
Example 2
As shown in fig. 1, the present embodiment provides a high deep-drawing forming performance aluminum-plastic composite film, which sequentially comprises an outer protective layer 1 of a modified nylon film or a modified polyester film, an outer glue layer 2, an outer chromium-free anticorrosive layer 3, an aluminum foil 4, an inner chromium-free anticorrosive layer 5, an inner glue layer 6 and an inner heat-sealing layer 7. The outer protective layer 1 of the modified nylon film or the modified polyester film is a layered structure formed by cross mixing of a polyrotaxane module unit and a nylon module unit or a polyester module unit. The polyrotaxane module unit accounts for 10% of the total mass of the nylon module unit or the polyester module unit and the polyrotaxane module unit.
The thickness of the outer protective layer 1 of the modified nylon film or the modified polyester film is 50 μm.
The thickness of the outer glue layer 2 was 10 μm.
The inner glue layer 6 was 10 μm thick.
The thickness of the aluminum foil 4 was 80 μm.
The thickness of the inner heat-seal layer 7 was 200. mu.m.
The aluminum-plastic composite film with high deep drawing forming performance of the embodiment is prepared by the following steps:
respectively granulating polyrotaxane and nylon (or polyester raw materials), mixing, blowing or stretching to prepare a film, and rolling; obtaining the outer protective layer 1 of the modified nylon film or the modified polyester film.
An outer layer chromium-free anticorrosive layer 3 and an inner layer chromium-free anticorrosive layer 5 are coated on both sides of a 8000 series (or 1000 series) soft (O state) aluminum foil 4.
Coating an outer glue layer 2 (the adopted glue has high adhesive force of 4-12N/15mm and self elasticity rate of 3-70GPa after being cured, and can be extended by more than 40 percent) on the other surface of the outer chromium-free anticorrosive layer 3, and then attaching a modified nylon film or a modified polyester film outer protective layer 1; and coating an inner glue layer 6 (adopting conventional polyolefin glue) on the other surface of the inner chromium-free anticorrosive layer 5, and attaching an inner heat-sealing layer 7 (a heat-sealing CPP film, a cast polyolefin material) after drying.
And obtaining the finished product of the aluminum-plastic composite film with high deep drawing forming performance after curing treatment.
Example 3
As shown in fig. 1, the present embodiment provides a high deep-drawing forming performance aluminum-plastic composite film, which sequentially comprises an outer protective layer 1 of a modified nylon film or a modified polyester film, an outer glue layer 2, an outer chromium-free anticorrosive layer 3, an aluminum foil 4, an inner chromium-free anticorrosive layer 5, an inner glue layer 6 and an inner heat-sealing layer 7. The outer protective layer 1 of the modified nylon film or the modified polyester film is a layered structure formed by cross mixing of a polyrotaxane module unit and a nylon module unit or a polyester module unit. The polyrotaxane module unit accounts for 1 percent of the total mass of the nylon module unit or the polyester module unit and the polyrotaxane module unit.
The thickness of the outer protective layer 1 of the modified nylon film or the modified polyester film is 10 μm.
The outer glue layer 2 had a thickness of 1 μm.
The inner glue layer 6 has a thickness of 1 μm.
The thickness of the aluminum foil 4 was 20 μm.
The thickness of the inner heat-seal layer 7 was 20 μm.
The aluminum-plastic composite film with high deep drawing forming performance of the embodiment is prepared by the following steps:
respectively granulating polyrotaxane and nylon (or polyester raw materials), mixing, blowing or stretching to prepare a film, and rolling; obtaining the outer protective layer 1 of the modified nylon film or the modified polyester film.
An outer layer chromium-free anticorrosive layer 3 and an inner layer chromium-free anticorrosive layer 5 are coated on both sides of a 8000 series (or 1000 series) soft (O state) aluminum foil 4.
Coating an outer glue layer 2 (the adopted glue has high adhesive force of 4-12N/15mm and self elasticity rate of 3-70GPa after being cured, and can be extended by more than 40 percent) on the other surface of the outer chromium-free anticorrosive layer 3, and then attaching a modified nylon film or a modified polyester film outer protective layer 1; and coating an inner glue layer 6 (adopting conventional polyolefin glue) on the other surface of the inner chromium-free anticorrosive layer 5, and attaching an inner heat-sealing layer 7 (a heat-sealing CPP film, a cast polyolefin material) after drying.
And obtaining the finished product of the aluminum-plastic composite film with high deep drawing forming performance after curing treatment.
Example 4
As shown in fig. 1, the present embodiment provides a high deep-drawing forming performance aluminum-plastic composite film, which sequentially comprises an outer protective layer 1 of a modified nylon film or a modified polyester film, an outer glue layer 2, an outer chromium-free anticorrosive layer 3, an aluminum foil 4, an inner chromium-free anticorrosive layer 5, an inner glue layer 6 and an inner heat-sealing layer 7. The outer protective layer 1 of the modified nylon film or the modified polyester film is a layered structure formed by cross mixing of a polyrotaxane module unit and a nylon module unit or a polyester module unit. The polyrotaxane module unit accounts for 6% of the total mass of the nylon module unit or the polyester module unit and the polyrotaxane module unit.
The thickness of the outer protective layer 1 of the modified nylon film or the modified polyester film is 30 μm.
The thickness of the outer glue layer 2 was 6 μm.
The inner glue layer 6 was 6 μm thick.
The thickness of the aluminum foil 4 was 50 μm.
The thickness of the inner heat-seal layer 7 was 100. mu.m.
The aluminum-plastic composite film with high deep drawing forming performance of the embodiment is prepared by the following steps:
respectively granulating polyrotaxane and nylon (or polyester raw materials), mixing, blowing or stretching to prepare a film, and rolling; obtaining the outer protective layer 1 of the modified nylon film or the modified polyester film.
An outer layer chromium-free anticorrosive layer 3 and an inner layer chromium-free anticorrosive layer 5 are coated on both sides of a 8000 series (or 1000 series) soft (O state) aluminum foil 4.
Coating an outer glue layer 2 (the adopted glue has high adhesive force of 4-12N/15mm and self elasticity rate of 3-70GPa after being cured, and can be extended by more than 40 percent) on the other surface of the outer chromium-free anticorrosive layer 3, and then attaching a modified nylon film or a modified polyester film outer protective layer 1; and coating an inner glue layer 6 (adopting conventional polyolefin glue) on the other surface of the inner chromium-free anticorrosive layer 5, and attaching an inner heat-sealing layer 7 (a heat-sealing CPP film, a cast polyolefin material) after drying.
And obtaining the finished product of the aluminum-plastic composite film with high deep drawing forming performance after curing treatment.
It is from top to bottom visible, the utility model discloses a high deep-draw formability aluminium-plastic composite film can improve the deep-draw formability of complex film through its multilayer composite structure.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a high deep-drawing formability plastic-aluminum complex film which characterized in that: the high-deep-drawing forming-performance aluminum-plastic composite film sequentially comprises a modified nylon film or a modified polyester film outer protective layer, an outer glue layer, an outer chromium-free anticorrosive layer, an aluminum foil, an inner chromium-free anticorrosive layer, an inner glue layer and an inner heat-sealing layer.
2. The high-drawing forming performance aluminum-plastic composite film according to claim 1, wherein: the thickness of the outer protective layer of the modified nylon film or the modified polyester film is 5-50 μm.
3. The high-drawing forming performance aluminum-plastic composite film according to claim 1, wherein: the thickness of the outer glue layer is 0.5-10 μm.
4. The high-drawing forming performance aluminum-plastic composite film according to claim 1, wherein: the thickness of the inner glue layer is 0.5-10 μm.
5. The high-drawing forming performance aluminum-plastic composite film according to claim 1, wherein: the thickness of the aluminum foil is 10-80 μm.
6. The high-drawing forming performance aluminum-plastic composite film according to claim 1, wherein: the thickness of the inner heat-sealing layer is 10-200 μm.
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| CN112721378A (en) * | 2020-12-16 | 2021-04-30 | 浙江华正能源材料有限公司 | Outer-layer film material for aluminum-plastic composite film and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112721378A (en) * | 2020-12-16 | 2021-04-30 | 浙江华正能源材料有限公司 | Outer-layer film material for aluminum-plastic composite film and application thereof |
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Address after: 213000 No.20 Changyang Road, West Taihu science and Technology Industrial Park, Wujin District, Changzhou City, Jiangsu Province Patentee after: Xinlun new energy materials (Changzhou) Co.,Ltd. Address before: 213000 No.20 Changyang Road, West Taihu science and Technology Industrial Park, Wujin District, Changzhou City, Jiangsu Province Patentee before: SELEN COMPOSITE MATERIAL (CHANGZHOU) CO.,LTD. |
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