CN1343614A - Soft package film of Lithium battery and its preparing process - Google Patents
Soft package film of Lithium battery and its preparing process Download PDFInfo
- Publication number
- CN1343614A CN1343614A CN 01134081 CN01134081A CN1343614A CN 1343614 A CN1343614 A CN 1343614A CN 01134081 CN01134081 CN 01134081 CN 01134081 A CN01134081 A CN 01134081A CN 1343614 A CN1343614 A CN 1343614A
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- layer
- polyamide polymers
- microns
- aluminium lamination
- lithium battery
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Abstract
A soft packing film for lithium battery is composed of aluminium layer as basic layer, the ethylene polyterephthalate and polyamide polymer layers attached to the external surface of basic layer, and the polyamide polymer and polypropylene layers attached to the internal surface of basic layer. Its advantages are high strength, resistance to water moisture, and electrolyte, airtightness and electric insulation, high prick resistance, and high machinability (cold punching).
Description
Technical field
The present invention relates to a kind of composite molding flexible packaging film, particularly a kind of lithium battery flexible packaging film that needs high-barrier and the requirement of cold stamping shaped property that is applicable to.
Background technology
With the immediate prior art of the present invention be that the patent No. is the Chinese patent of ZL99212336, it discloses a kind of lithium battery flexible packaging film, comprise outer, in, interior three-decker, one deck is an aluminium lamination in the middle of it, the outer polyethylene terephthalate that adopts, apply one deck low density polyethylene layer again on the aluminium lamination inside face, coat ethene-(methyl) acrylic copolymer layer again on low density polyethylene layer, low density polyethylene layer and ethene-(methyl) acrylic copolymer layer constitutes internal layer jointly.The problem of its existence is: the polyethylene terephthalate layer stretchability of employing is bad, and the cold punching performance is bad, in addition aluminium lamination too thin also be unfavorable for cold stamping shaped.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of lithium cell packaging moulding flexible packaging film.It after cold stamping shaped, when still can significantly improve or guarantee waterproof, protection against the tide, leak tightness and insulativity, can also electrolyte resistance and the puncture performance of the technological requirement of homemade lithium cell.
Another technical matters that will solve of the present invention is a kind of complex method that has proposed this lithium battery flexible packaging film.
The technical problem to be solved in the present invention is achieved through the following technical solutions, a kind of lithium battery flexible packaging film, it is a basal layer with the aluminium lamination, is characterized in: be attached with the polyamide polymers layer or be attached with polyethylene terephthalate's layer and polyamide polymers layer from outside to inside successively at the aluminium lamination outside face; Adhering at the aluminium lamination inside face has polypropylene layer or is attached with polyamide polymers layer and polypropylene layer from outside to inside successively; Described polyamide polymers is polycaprolactam or polyhexamethylene adipamide or polyhexamethylene sebacamide.
The technical problem to be solved in the present invention can also come further to realize by the following technical programs, described outer polyethylene terephthalate's layer thickness is 9～12 microns, outer polyamide polymers layer thickness is 15～25 microns, intermediate base layer aluminum layer thickness is 40～60 microns, internal layer polyamide polymers layer thickness is 15～25 microns, and internal layer polypropylene layer thickness is 35～70 microns.
Another technical matters that will solve of the present invention is achieved through the following technical solutions, outer field polyethylene terephthalate's layer and polyamide polymers layer adopt dry type compound, adopt dry type compound between outer polyamide polymers layer and the aluminium lamination, the polyamide polymers layer of internal layer and polypropylene layer are extruded compound or are extruded jointly and be compound on the middle aluminium lamination.The film of said structure by compound good after, divide the specification that is cut to a certain size again, polypropylene layer inwards, first cold punching is pressed into and requires shape, reinstalls the lithium cell and the battery acid of respective shapes, after hot pressing three banding mouths.
Lithium cell packaging moulding flexible packaging film of the present invention; because skin has adopted polyamide polymers; the protection aluminium lamination is when cold stamping shaped; aluminium lamination is difficult for breaking; it is after cold stamping shaped; when still can significantly improve or guarantee waterproof, protection against the tide, leak tightness and insulativity, can also electrolyte resistance and the puncture performance of the technological requirement of homemade lithium cell.The not only cold stamping shaped property of these structures is good, and intercept water and steam, the air performance is good, inclusion antipollution heat sealability, puncture and electrolyte resistance soak property, electrical insulating property is effective.
The specific embodiment
Embodiment one, a kind of lithium battery flexible packaging film, and it is followed successively by the internal layer of the skin of polyethylene terephthalate's layer and polyamide polymers layer formation, middle aluminium lamination, polyamide polymers layer and polypropylene layer formation from outside to inside; Described polyamide polymers adopts polycaprolactam.Its ectomesoderm polyethylene terephthalate layer thickness is 9 microns, and outer polyamide polymers layer thickness is 15 microns, and the aluminum interlayer layer thickness is 40 microns, and internal layer polyamide polymers layer thickness is 15 microns, and internal layer polypropylene layer thickness is 35 microns.
Embodiment two, in the foregoing description, and the internal layer that also can adopt the skin that is followed successively by polyethylene terephthalate's layer and polyamide polymers layer from outside to inside and constitutes, middle aluminium lamination, polypropylene layer to constitute; Described polyamide polymers adopts polyhexamethylene adipamide.Its ectomesoderm polyethylene terephthalate layer thickness is 10 microns, and outer polyamide polymers layer thickness is 20 microns, and the aluminum interlayer layer thickness is 50 microns, and internal layer polypropylene layer thickness is 50 microns.
Embodiment three, in the foregoing description one, and the internal layer that also can adopt the skin that is followed successively by the polyamide polymers layer from outside to inside and constitutes, middle aluminium lamination, polyamide polymers layer and polypropylene layer to constitute; Described polyamide polymers adopts polyhexamethylene sebacamide.Its ectomesoderm polyamide polymers layer thickness is 25 microns, and the aluminum interlayer layer thickness is 60 microns, and internal layer polyamide polymers layer thickness is 25 microns, and internal layer polypropylene layer thickness is 50 microns.
Embodiment four, in the foregoing description one, and the internal layer that also can adopt the skin that is followed successively by the polyamide polymers layer from outside to inside and constitutes, middle aluminium lamination, polypropylene layer to constitute; Described polyamide polymers adopts polycaprolactam.Its ectomesoderm polyamide polymers layer thickness is 25 microns, and the aluminum interlayer layer thickness is 60 microns, and internal layer polypropylene layer thickness is 70 microns.
Claims (3)
1. lithium battery flexible packaging film, it is a basal layer with the aluminium lamination, it is characterized in that: be attached with the polyamide polymers layer or be attached with polyethylene terephthalate's layer and polyamide polymers layer from outside to inside successively at the aluminium lamination outside face; Adhering at the aluminium lamination inside face has polypropylene layer or is attached with polyamide polymers layer and polypropylene layer from outside to inside successively, and described polyamide polymers is polycaprolactam or polyhexamethylene adipamide or polyhexamethylene sebacamide.
2. lithium battery flexible packaging film according to claim 1, it is characterized in that: described outer polyethylene terephthalate's layer thickness is 9～12 microns, outer polyamide polymers layer thickness is 15～25 microns, the aluminum interlayer layer thickness is 40～60 microns, internal layer polyamide polymers layer thickness is 15～25 microns, and internal layer polypropylene layer thickness is 35～70 microns.
3. the complex method of the described lithium battery flexible packaging film of claim 1, it is characterized in that: outer field polyethylene terephthalate's layer and polyamide polymers layer adopt dry type compound, adopt dry type compound between outer polyamide polymers layer and the aluminium lamination, the polyamide polymers layer of internal layer and polypropylene layer are extruded compound or coextrusion is compound on the middle aluminium lamination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134081 CN1129547C (en) | 2001-10-24 | 2001-10-24 | Soft package film of lithium battery and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134081 CN1129547C (en) | 2001-10-24 | 2001-10-24 | Soft package film of lithium battery and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1343614A true CN1343614A (en) | 2002-04-10 |
| CN1129547C CN1129547C (en) | 2003-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01134081 Expired - Lifetime CN1129547C (en) | 2001-10-24 | 2001-10-24 | Soft package film of lithium battery and its preparing process |
Country Status (1)
| Country | Link |
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| CN (1) | CN1129547C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424913C (en) * | 2003-07-11 | 2008-10-08 | 株式会社Lg化学 | Secondary battery with an improved safety |
| CN103635248A (en) * | 2011-05-09 | 2014-03-12 | 日立造船株式会社 | Zeolite-membrane separation/recovery system for CO2 |
| CN106505162A (en) * | 2016-10-27 | 2017-03-15 | 明冠新材料股份有限公司 | A kind of compound high-performance aluminum plastic film and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414653C (en) * | 2004-04-23 | 2008-08-27 | 清华大学深圳研究生院 | A high-energy super capacitor capable of preventing electrochemical corrosion |
-
2001
- 2001-10-24 CN CN 01134081 patent/CN1129547C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424913C (en) * | 2003-07-11 | 2008-10-08 | 株式会社Lg化学 | Secondary battery with an improved safety |
| CN103635248A (en) * | 2011-05-09 | 2014-03-12 | 日立造船株式会社 | Zeolite-membrane separation/recovery system for CO2 |
| CN106505162A (en) * | 2016-10-27 | 2017-03-15 | 明冠新材料股份有限公司 | A kind of compound high-performance aluminum plastic film and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1129547C (en) | 2003-12-03 |
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Granted publication date: 20031203 |
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