CN212171549U - Packaging material for battery - Google Patents
Packaging material for battery Download PDFInfo
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- CN212171549U CN212171549U CN201922086009.XU CN201922086009U CN212171549U CN 212171549 U CN212171549 U CN 212171549U CN 201922086009 U CN201922086009 U CN 201922086009U CN 212171549 U CN212171549 U CN 212171549U
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- layer
- battery
- base material
- packaging material
- polyolefin
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Abstract
The utility model relates to a packaging material for a battery and a battery thereof, which comprises a heat sealing layer, a blocking layer, an adhesive layer and a substrate layer; the base material layer is made of polyolefin modified polyester material or polyolefin plastomer modified polyamide material or a laminated body of the two materials; the dynamic and static friction coefficients of the substrate layer are all less than 0.2. According to the battery packaging material, the base material layer is modified, and the opening agent containing an inorganic component or the slipping agent containing an organic component is added, so that the elongation at break of the base material layer can be improved, the dynamic and static friction coefficient of the base material layer is reduced, the punching depth performance of a laminated body is improved, and the battery packaging material with excellent formability is obtained.
Description
Technical Field
The utility model relates to a battery packaging material produces technical field, specific theory is a packaging material for battery.
Background
As an important component of the battery, the packaging material is used for packaging and insulating battery elements such as electrolyte, anode and cathode materials and the like.
In addition, with diversification and high performance of battery products, the battery packaging material is required to be adaptable to various scenes. Therefore, flexible packaging materials which are light and easy to process and are compounded by multiple layers of materials are increasingly popular.
The packaging material is required to form a pit through a deep-drawing device, then battery elements such as a positive electrode, a negative electrode, an electrolyte and the like are placed in the pit, and a heat-sealing layer is folded and heat-sealed, so that the battery with various battery elements wrapped in the packaging material for the battery is obtained.
In the process of forming the pits, the packaging material is easily damaged, resulting in holes or cracks. In the process of transporting and using products, the packaging materials are easy to damage due to collision and friction, and the use of the products is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a packaging material for battery and battery thereof.
The purpose of the utility model is realized through the following technical scheme:
a packaging material for a battery comprises a heat sealing layer, a barrier layer, an adhesive layer and a substrate layer; the base material layer is made of polyolefin modified polyester material or polyolefin plastomer modified polyamide material or a laminated body of the two materials;
the dynamic and static friction coefficients of the substrate layer are all less than 0.2.
The elongation at break of the material of the substrate layer is 100-500%.
The thickness of the substrate layer is 5-50 mu m.
The base material layer contains an inorganic component opening agent or an organic component slipping agent, or contains both of them.
A method for manufacturing a battery packaging material, characterized in that: the method comprises the following specific steps:
and a step of obtaining a multilayer composite film by sequentially laminating at least the heat seal layer, the barrier layer, the adhesive layer and a base material layer, wherein the base material layer is formed of a polyolefin-modified polyester material, a polyolefin plastomer-modified polyamide material, or a laminate of two materials.
A battery comprises the packaging material.
Compared with the prior art, the utility model has the positive effects that:
according to the present invention, in the packaging material for a battery comprising at least a heat seal layer, a barrier layer, an adhesive layer, and a base material layer, the base material layer is made of a polyolefin-modified polyester material or a polyolefin plastomer-modified polyamide material or a laminate of two materials, and contains an inorganic component of a lubricant or an organic component of a lubricant, or contains both of the above components. This can provide a battery packaging material having excellent moldability.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
description of the element reference numerals
1 Heat-sealing layer
2 barrier layer
3 adhesive layer
4 base material layer
Detailed Description
The following provides a specific embodiment of a battery packaging material and a battery thereof.
As shown in fig. 1, a battery packaging material is composed of a laminate of a heat seal layer 1, a barrier layer 2, an adhesive layer 3, and a base material layer 4 in this order.
The heat sealing layer 1 is made of polyolefin materials, including but not limited to one or more of polyethylene, polypropylene and the like, and the thickness is not limited, and the recommended range is 20-100 μm.
The barrier layer 2 is made of metal materials such as aluminum foil, stainless steel, copper and the like, preferably aluminum foil; the thickness is not limited, and the recommended range is 20-80 μm.
The adhesive layer 3 has an adhesive effect, has a thickness of 1-5 μm, and is composed of polymer resin, including but not limited to polyurethane and acid-modified polyolefin polymer.
The base material layer 4 is made of a polyolefin-modified polyester material, a polyolefin plastomer-modified polyamide material, or a laminate of two materials, and contains an inorganic component of an opening agent or an organic component of a slipping agent, or contains both of them, and the recommended thickness range is 5 to 50 μm. The elongation at break is 100-500%.
The following provides specific embodiments of the present invention to further explain the present invention.
Example 1
A battery packaging material is composed of a composite layer of at least a heat seal layer, a barrier layer, an adhesive layer and a base material layer.
The substrate layer is made of polyester material modified by polyolefin, the polyolefin includes but is not limited to polyethylene, polypropylene and the like; in particular to polypropylene modified polybutylene terephthalate, the breaking elongation of which is preferably 100 to 200 percent.
The base material layer contains an opening agent with an inorganic component or a slipping agent with an organic component, or contains the two components at the same time, wherein the opening agent with the inorganic component comprises but is not limited to talcum powder, silicon dioxide, calcium carbonate, barium sulfate, magnesium oxide and the like; the slip agent for the organic component includes, but is not limited to, oleamide, erucamide, and the like. The substrate layer contains a compatilizer, specifically maleic anhydride graft modified polyolefin
The following provides a method of making a substrate layer:
1, preparing polyolefin modified polyester resin through blending modification;
the modified resin comprises the following materials in percentage by weight
65% of polybutylene terephthalate
25 percent of polypropylene
10 percent of maleic anhydride graft modified polyolefin
In addition, the content of the opening agent and the slipping agent is less than 1 percent.
Mixing the above materials with high speed mixer or mixing machine, and extruding to obtain blending modified polyester resin
2, biaxially stretching to prepare a film required by the substrate layer;
adding the prepared modified resin into a hopper, uniformly extruding the resin from a T-shaped die after melting, quenching the resin on a cooling roller, preheating the resin on a preheating roller, stretching the resin in the transverse and longitudinal directions, and simultaneously carrying out corona treatment on one side of the substrate layer film close to the aluminum foil to obtain the biaxially oriented polyolefin modified polybutylene terephthalate film with the thickness of 25 mu m.
The heat seal layer, the barrier layer, the adhesive layer, and the base material layer are sequentially stacked by a composite technique known in the art to obtain a laminate.
Preferably, the heat-sealable layer is formed from a 40 μm three-layer coextruded polypropylene film.
Preferably, the barrier layer is made of 40 μm aluminum foil.
Preferably, the adhesive layer is a polyurethane adhesive. The thickness was 2 μm.
The specific performance parameters of the above materials are shown in the following table:
comparative example 1
The substrate layer was a conventional polybutylene terephthalate film, and the heat seal layer, barrier layer, and adhesive layer were the same as in example 1, and the laminate was obtained by the same method, and the specific performance parameters thereof are shown in the following table:
example 2
A battery packaging material is composed of a composite layer of at least a heat seal layer, a barrier layer, an adhesive layer and a base material layer.
The base material layer is made of polyolefin plastomer modified polyamide material, specifically polyolefin plastomer modified nylon-6, and the breaking elongation of the base material layer is preferably 100-200%.
The base material layer contains an opening agent with an inorganic component or a slipping agent with an organic component, or contains the two components at the same time, wherein the opening agent with the inorganic component comprises but is not limited to talcum powder, silicon dioxide, calcium carbonate, barium sulfate, magnesium oxide and the like; the slip agent for the organic component includes, but is not limited to, oleamide, erucamide, and the like. The substrate layer contains a compatilizer, specifically maleic anhydride graft modified polyolefin.
The following provides a method of making a substrate layer:
1, preparing polyolefin plastomer modified polyamide resin through blending modification;
the modified resin comprises the following materials in percentage by weight
Nylon-670
Polyolefin plastomer 20
Maleic anhydride graft-modified polyolefin 10
In addition, the content of the opening agent and the slipping agent is less than 1 percent.
The materials are fully and uniformly mixed by a high-speed mixer or a mixing roll, and then the mixture is extruded by an extrusion granulator to prepare the blending modified polyamide resin.
2, biaxially stretching to prepare a film required by the substrate layer;
adding the prepared modified resin into a hopper, uniformly extruding the resin from a T-shaped die after melting, then quenching the resin on a cooling roller, preheating the resin on a preheating roller, stretching the resin in the transverse and longitudinal directions, and simultaneously carrying out corona treatment on one side of the substrate layer film close to the aluminum foil to obtain the biaxially oriented polyolefin plastomer modified poly-p-polyamide resin film with the thickness of 25 mu m.
The heat seal layer, the barrier layer, the adhesive layer, and the base material layer are sequentially stacked by a composite technique known in the art to obtain a laminate.
Preferably, the heat-sealable layer is formed from a 40 μm three-layer coextruded polypropylene film.
Preferably, the barrier layer is made of 40 μm aluminum foil.
Preferably, the adhesive layer is a polyurethane adhesive. The thickness was 2 μm.
The specific performance parameters of the above materials are shown in the following table:
comparative example 2
The substrate layer was a conventional polyamide film, and the heat seal layer, barrier layer, and adhesive layer were the same as in example 1, and a laminate was obtained in the same manner, and the specific performance parameters thereof are shown in the following table:
from the results of the examples and comparative examples, it is understood that by modifying the base material layer and adding an inorganic-component opening agent or an organic-component slipping agent, the elongation at break of the base material layer can be increased, the coefficient of dynamic and static friction thereof can be reduced, the punching depth performance of the laminate can be improved, and a battery packaging material having excellent moldability can be obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as within the protection scope of the present invention.
Claims (6)
1. The packaging material for the battery is characterized by comprising a heat sealing layer, a barrier layer, an adhesive layer and a base material layer; the base material layer is made of polyolefin modified polyester material or polyolefin plastomer modified polyamide material or a laminated body of the two materials.
2. The packaging material for a battery according to claim 1, wherein the elongation at break of the material of the base material layer is 100% to 500%.
3. The packaging material for a battery according to claim 1, wherein the thickness of the base material layer is 5 to 50 μm.
4. The packaging material for batteries according to claim 1, wherein the thickness of the heat-seal layer is in the range of 20 to 100 μm.
5. The packaging material for batteries according to claim 1, wherein the thickness of the barrier layer is in the range of 20 to 80 μm.
6. The packaging material for batteries according to claim 1, wherein the thickness of the adhesive layer is 1 to 5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086009.XU CN212171549U (en) | 2019-11-28 | 2019-11-28 | Packaging material for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086009.XU CN212171549U (en) | 2019-11-28 | 2019-11-28 | Packaging material for battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212171549U true CN212171549U (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922086009.XU Active CN212171549U (en) | 2019-11-28 | 2019-11-28 | Packaging material for battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212171549U (en) |
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2019
- 2019-11-28 CN CN201922086009.XU patent/CN212171549U/en active Active
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