CN207159127U - A kind of mould release membrance combination for being used to process battery grade lithium band and the lithium band composite membrane prepared by it - Google Patents
A kind of mould release membrance combination for being used to process battery grade lithium band and the lithium band composite membrane prepared by it Download PDFInfo
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- CN207159127U CN207159127U CN201720922560.1U CN201720922560U CN207159127U CN 207159127 U CN207159127 U CN 207159127U CN 201720922560 U CN201720922560 U CN 201720922560U CN 207159127 U CN207159127 U CN 207159127U
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- mould release
- release membrance
- silicon layer
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Abstract
The utility model discloses a kind of mould release membrance combination for being used to process battery grade lithium band and the lithium band composite membrane prepared by it.Mould release membrance for processing battery grade lithium band combines, including the first mould release membrance and the second mould release membrance；First mould release membrance includes silicon layer and base layer connected in order, or the first mould release membrance includes silicon layer connected in order, acrylic acid priming coat and base layer；Second mould release membrance includes silicon layer and base layer connected in order, or the second mould release membrance includes silicon layer connected in order, acrylic acid priming coat and base layer；The surface roughness of first mould release membrance silicon layer is less than the surface roughness of the second mould release membrance silicon layer.The utility model is used for the mould release membrance combination for processing battery grade lithium band, plays a part of buffering and protecting lithium band in processing, prevents lithium band from producing adhesion in process and causing broken belt；The lithium band composite membrane excellent performance prepared by it.
Description
Technical field
It the utility model is related to a kind of mould release membrance combination for being used to process battery grade lithium band and the lithium band prepared by it be compound
Film, belong to lithium ion battery production field.
Background technology
Secondary cell using lithium as negative electrode active material is due to high, higher than energy with voltage, and specific power is big, electric discharge is flat
Surely, storage time is long and advantages of environment protection and be taken seriously.Lithium at normal temperatures easily with the O in air2、N2And H2O etc. is anti-
Should, and easily there is adhesion and causes broken belt in processing in battery grade lithium band.
Utility model content
Easily occurs the defects of adhesion causes broken belt in processing to solve battery grade lithium band in the prior art, this practicality is newly
Type provides a kind of mould release membrance combination for being used to process battery grade lithium band and the lithium band composite membrane prepared by it.
In order to solve the above technical problems, technical scheme is as follows used by the utility model：
A kind of mould release membrance combination for being used to process battery grade lithium band, including the first mould release membrance and the second mould release membrance；First from
Type film includes silicon layer and base layer connected in order, or the first mould release membrance includes silicon layer connected in order, acrylic acid primary coat
Layer and base layer；Second mould release membrance includes silicon layer and base layer connected in order, or the second mould release membrance including connected in order
Silicon layer, acrylic acid priming coat and base layer；The surface roughness of first mould release membrance silicon layer is less than the second mould release membrance silicon layer
Surface roughness.
Acrylic acid priming coat is made by acrylic compounds silane coupling agent.
In use, it is that silicon layer contacts with lithium band to be processed.
When processing lithium band, the first mould release membrance and the second mould release membrance are respectively placed in the both sides of lithium band to be processed, pass through silicone oil
Layer fits together with lithium band, to play preferable cushioning and protection to lithium band to be processed.After process finishing, first from
Type film forms lithium band composite membrane with lithium band, and the lithium band composite membrane that the second mould release membrance is formed with lithium band and the first mould release membrance is peeled off.
The surface roughness of silicon layer is less than the surface roughness of silicon layer in the second mould release membrance in first mould release membrance, so as to
So that the absorption affinity between the first mould release membrance and lithium band to be processed is more than the absorption between the second mould release membrance and lithium band to be processed
Power, then after process finishing, the first mould release membrance can attach with lithium band, and the second mould release membrance can be easily peelable without viscous from lithium band
Lithium band.
Above-mentioned mould release membrance combination is played a part of buffering and protecting lithium band in processing.
To be further ensured that the flatness of matrix layer surface, the thickness of acrylic acid priming coat is 0~0.1 in the first mould release membrance
μm；The thickness of acrylic acid priming coat is 0~0.1 μm in second mould release membrance.
In order to further improve the protecting effect to lithium band, base layer is PET matrix layer, PP base layers, Ge Laxin matrixes
Layer or non-woven fabrics base layer；The thickness of base layer is 5 μm~150 μm.Further preferably, base layer is PET matrix layer；Base layer
Thickness be 12 μm~50 μm.
The polyethylene terephthalate abbreviation that above-mentioned PET is, PP is polyacrylic abbreviation.
In order to facilitate preparation, while ensure the protecting effect to lithium band, the surface roughness of the first mould release membrance silicon layer is
0.001-0.05 μm, the surface roughness of the second mould release membrance silicon layer is 0.05-0.3 μm.
In order to be further ensured that the quality of lithium band, the off-type force of silicon layer is 7g/in~30g/in in the first mould release membrance, residual
Remaining then rate is 60%~100%, and coating weight (dry silicon amount) is 0.05g/m2~1.5g/m2；In second mould release membrance silicon layer from
Type power is 2g/in~10g/in, and remaining then rate is 40%~80%, and coating weight (dry silicon amount) is 0.4g/m2~2.0g/m2.Enter
One step is preferred, and the off-type force of silicon layer is 8g/in~12g/in in the first mould release membrance, and remaining then rate is 85%~95%, is applied
Cloth amount (dry silicon amount) is 0.1g/m2~0.3g/m2；The off-type force of silicon layer is 4g/in~6g/in in second mould release membrance, and remnants connect
It is 50%~70% rate, and coating weight (dry silicon amount) is 0.8g/m2~1.2g/m2。
A kind of lithium band composite membrane, including lithium band and the first mould release membrance for being compounded in lithium band wherein one side, the first mould release membrance bag
Silicon layer and base layer connected in order are included, or the first mould release membrance includes silicon layer connected in order, acrylic acid priming coat and base
Body layer.
In order to improve the stripping of mould release membrance and barrier propterty, the silicon layer raw material of the first mould release membrance includes：Silicone oil host 5~
20 parts, 80~100 parts of solvent naphtha, 0~5 part of peeling force additive, 0~0.1 part of crosslinking agent, 0~0.1 part of catalyst and Anchor Agent
0~0.1 part, the number is mass fraction；The silicon layer raw material of second mould release membrance includes：25~50 parts of silicone oil host, solvent
0~0.5 part of 50~80 parts of oil, 0~15 part of peeling force additive, 0~0.5 part of crosslinking agent, 0~0.5 part of catalyst and Anchor Agent,
The number is mass fraction.
It is reactive siloxane polymer to further take into account stripping and barrier propterty, silicone oil host；Solvent naphtha is first
At least one of benzene, dimethylbenzene, 120# solvent naphthas, ethyl acetate, butyl acetate or n-hexane；Peeling force additive is silicone
Resin solution；Crosslinking agent is SiH functional silicones；Catalyst is organo-platinic compounds；Anchor Agent is compound organic functional silica
Alkane.
Above-mentioned silicon layer is prepared as：After each raw material components of silicon layer are well mixed, matrix is coated on by applicator roll
On layer or acrylic acid priming coat, it is heating and curing and forms；Acrylic acid priming coat is prepared as：Applicator roll is passed through by acrylic compounds glue
Coated on base layer, it is heating and curing and forms；The curing of the solidification of silicon layer and the curing phase of acrylic acid priming coat
Together, carry out as follows：It is solidificated in baking oven and completes, eight areas to connect successively is included in baking oven, wherein, the firstth area
Solidification temperature be 75 ± 5 DEG C, the solidification temperature in the secondth area is 95 ± 5 DEG C, and the solidification temperature in the 3rd area is 120 ± 5 DEG C, the 4th
The solidification temperature in area is 130-150 DEG C, and the solidification temperature in the 5th area is 130-150 DEG C, and the solidification temperature in the 6th area is 125 ± 5
DEG C, the solidification temperature of SECTOR-SEVEN is 120 ± 5 DEG C, and the solidification temperature of Section Eight is 100 ± 5 DEG C, and during solidification, material is with the 60-72 seconds
Section Eight is at the uniform velocity flowed to successively from the firstth area, and the length in each area is 3 ± 0.1m.When containing acrylic acid priming coat, first will
After the solidification of acrylic acid priming coat, silicon layer is coated with, then again solidifies silicon layer in a manner of same with acrylic acid priming coat.
The NM technology of the utility model is with reference to prior art.
The utility model is used for the mould release membrance combination for processing battery grade lithium band, and buffering is played in processing and protects lithium band
Effect, prevents lithium band from producing adhesion in process and causing broken belt；The lithium band composite membrane excellent performance prepared by it；Preparation side
Method is simple.
Brief description of the drawings
When Fig. 1 is processes lithium band, mould release membrance is applied in combination mode and illustrated；
Fig. 2 is the first mould release membrance structural representation without priming coat；
Fig. 3 is the first mould release membrance structural representation with priming coat；
Fig. 4 is the second mould release membrance structural representation without priming coat；
Fig. 5 is the second mould release membrance structural representation with priming coat；
In above-mentioned each figure, 1 is base layer, and 2 be silicon layer, and 3 be priming coat, and 4 be lithium band composite membrane, and 5 be the first mould release membrance,
6 be the second mould release membrance, and 7 be lithium band to be processed.
Embodiment
In order to more fully understand the utility model, content of the present utility model is furtherd elucidate with reference to embodiment, but
Content of the present utility model is not limited solely to the following examples.
Embodiment 1
Such as figure, the mould release membrance for processing battery grade lithium band combines, and the first mould release membrance and the second mould release membrance are by order phase
Silicon layer, acrylic acid priming coat and the base layer connect is formed；Wherein, the off-type force of silicon layer is 30g/in in the first mould release membrance,
Remaining then rate is 60%, and coating weight (dry silicon amount) is 0.05g/m2, the off-type force of silicon layer is 10g/in in the second mould release membrance,
Remaining then rate is 40%, and coating weight (dry silicon amount) is 0.4g/m2；Base layer is PET, and thickness is 12 μm；First mould release membrance and
The thickness of acrylic acid priming coat is 0.02 μm in second mould release membrance；The surface roughness of first mould release membrance silicon layer is 0.001 μ
M, the surface roughness of the second mould release membrance silicon layer is 0.05 μm.
In the raw material of above-mentioned first mould release membrance silicon layer, silicone oil host addition is 5 parts, solvent naphtha addition is 99 parts,
Peeling force additive addition is 5 parts, crosslinking agent addition is 0.03 part, catalyst loading is 0.02 part, Anchor Agent addition
Measure as 0.01 part.Solvent naphtha is 120# solvent naphthas, and silicone oil host is reactive siloxane polymer (Dow Corning Corporation, 7558),
Peeling force additive is silicone resin solution (Dow Corning Corporation, 7210), crosslinking agent be SiH functional silicones (Dow Corning Corporation,
7387), catalyst is organo-platinic compounds (Dow Corning Corporation, 4000), and Anchor Agent is compound organofunctional silicone (DOW CORNING
Company, 9176)；
In the raw material of second mould release membrance silicon layer, silicone oil host addition is 25 parts, solvent naphtha addition is 80 parts, peeled off
Power additive addition is 15 parts, crosslinking agent addition is 0.3 part, catalyst loading is 0.2 part, Anchor Agent addition is
0.1 part.Solvent naphtha is 120# solvent naphthas, and silicone oil host is reactive siloxane polymer (Dow Corning Corporation, 7362), peeling force
Additive is silicone resin solution (Dow Corning Corporation, 7210), and crosslinking agent is SiH functional silicones (Dow Corning Corporation, 7028),
Catalyst is organo-platinic compounds (Dow Corning Corporation, 4000), Anchor Agent be compound organofunctional silicone (Dow Corning Corporation,
297)；
Above-mentioned silicon layer is prepared as：After each raw material components of silicon layer are well mixed, propylene is coated on by applicator roll
On sour priming coat, it is heating and curing and forms；Acrylic acid priming coat is prepared as：By (the 7361 Changxing material industries of acrylic compounds glue
Limited company) it is coated on by applicator roll on base layer, it is heating and curing and forms；The curing of the solidification of silicon layer and third
The curing of olefin(e) acid priming coat is identical, carries out as follows：It is solidificated in baking oven and completes, phase successively is included in baking oven
Eight areas connect, wherein, the solidification temperature in the firstth area is 75 DEG C, and the solidification temperature in the secondth area is 95 DEG C, the solidification temperature in the 3rd area
Spend for 120 DEG C, the solidification temperature in the 4th area is 130 DEG C, and the solidification temperature in the 5th area is 130 DEG C, and the solidification temperature in the 6th area is
125 DEG C, the solidification temperature of SECTOR-SEVEN is 120 DEG C, and the solidification temperature of Section Eight is 100 DEG C, and during solidification, material was with 60 seconds from first
Area at the uniform velocity flows to Section Eight successively, and the length in each area is 3m.After first acrylic acid priming coat is solidified, silicon layer is coated with,
Then silicon layer is solidified in a manner of same with acrylic acid priming coat again.
Embodiment 2
Such as figure, the mould release membrance for processing battery grade lithium band combines, and the first mould release membrance and the second mould release membrance are by order phase
Silicon layer, acrylic acid priming coat and the base layer connect is formed；Wherein, the off-type force of silicon layer is 10g/in in the first mould release membrance,
Remaining then rate is 90%, and coating weight (dry silicon amount) is 0.2g/m2, the off-type force of silicon layer is 5g/in in the second mould release membrance, residual
Remaining then rate is 50%, and coating weight (dry silicon amount) is 1.0g/m2, base layer PET, thickness is 36 μm；First mould release membrance and
The thickness of acrylic acid priming coat is 0.05 μm in two mould release membrances；The surface roughness of first mould release membrance silicon layer is 0.01 μm,
The surface roughness of second mould release membrance silicon layer is 0.1 μm.
In the raw material of first mould release membrance silicon layer, silicone oil host addition is 10 parts, solvent naphtha addition is 90 parts, peeled off
Power additive addition is 2.5 parts, crosslinking agent addition is 0.05 part, catalyst loading is 0.04 part, Anchor Agent addition
For 0.03 part.Solvent naphtha is 120# solvent naphthas, and silicone oil host is reactive siloxane polymer (Dow Corning Corporation, 7458), stripping
Be silicone resin solution (Dow Corning Corporation, 7210) from power additive, crosslinking agent be SiH functional silicones (Dow Corning Corporation,
7672), catalyst is organo-platinic compounds (Dow Corning Corporation, 4000), and Anchor Agent is compound organofunctional silicone (DOW CORNING
Company, 9250)；
In the raw material of second mould release membrance silicon layer, silicone oil host addition is 35 parts, solvent naphtha addition is 70 parts, peeled off
Power additive addition is 7 parts, crosslinking agent addition is 0.3 part, catalyst loading is 0.2 part, Anchor Agent addition is 0.1
Part.Solvent naphtha is 120# solvent naphthas, and silicone oil host is reactive siloxane polymer (Dow Corning Corporation, 9106), and peeling force adds
It is silicone resin solution (Dow Corning Corporation, 7210) to add agent, and crosslinking agent is SiH functional silicones (Dow Corning Corporation, 7387), is urged
Agent is organo-platinic compounds (Dow Corning Corporation, 4000), Anchor Agent be compound organofunctional silicone (Dow Corning Corporation,
9176)；
Above-mentioned silicon layer is prepared as：After each raw material components of silicon layer are well mixed, propylene is coated on by applicator roll
On sour priming coat, it is heating and curing and forms；Acrylic acid priming coat is prepared as：By (the 7361 Changxing material industries of acrylic compounds glue
Limited company) it is coated on by applicator roll on base layer, it is heating and curing and forms；The curing of the solidification of silicon layer and third
The curing of olefin(e) acid priming coat is identical, carries out as follows：It is solidificated in baking oven and completes, phase successively is included in baking oven
Eight areas connect, wherein, the solidification temperature in the firstth area is 75 DEG C, and the solidification temperature in the secondth area is 95 DEG C, the solidification temperature in the 3rd area
Spend for 120 DEG C, the solidification temperature in the 4th area is 135 DEG C, and the solidification temperature in the 5th area is 135 DEG C, and the solidification temperature in the 6th area is
125 DEG C, the solidification temperature of SECTOR-SEVEN is 120 DEG C, and the solidification temperature of Section Eight is 100 DEG C, and during solidification, material was with 65 seconds from first
Area at the uniform velocity flows to Section Eight successively, and the length in each area is 3m.After first acrylic acid priming coat is solidified, silicon layer is coated with,
Then silicon layer is solidified in a manner of same with acrylic acid priming coat again.
Embodiment 3
A kind of mould release membrance combination for being used to process battery grade lithium band as Figure 1-5, the first mould release membrance and second release
Film is formed by silicon layer connected in order, acrylic acid priming coat and base layer；Wherein, in the first mould release membrance silicon layer it is release
Power is 7g/in, and remaining then rate is 99%, and coating weight (dry silicon amount) is 0.3g/m2, the off-type force of silicon layer in the second mould release membrance
For 2g/in, remaining then rate is 80%, and coating weight (dry silicon amount) is 2.0g/m2, base layer PET, thickness is 50 μm；First
The thickness of acrylic acid priming coat is 0.08 μm in mould release membrance and the second mould release membrance；The surface roughness of first mould release membrance silicon layer
For 0.05 μm, the surface roughness of the second mould release membrance silicon layer is 0.3 μm.
In the raw material of first mould release membrance silicon layer, silicone oil host addition is 20 parts, solvent naphtha addition is 80 parts, peeled off
Power additive addition is 0 part, crosslinking agent addition is 0.1 part, catalyst loading is 0.1 part, Anchor Agent addition is 0.1
Part.Solvent naphtha is 120# solvent naphthas, and silicone oil host is reactive siloxane polymer (Wa Ke groups, D955), and peeling force is added
Agent is silicone resin solution (Wa Ke groups, CRA21), and crosslinking agent is SiH functional silicones (Wa Ke groups, V99), and catalyst is
Organo-platinic compounds (Wa Ke groups, C05), Anchor Agent are compound organofunctional silicone (Wa Ke groups, HF86)；
Second mould release membrance silicon layer silicone oil host addition is 25 parts, solvent naphtha addition is 50 parts, peeling force additive
Addition is 0, crosslinking agent addition is 0.3 part, catalyst loading is 0.2 part, Anchor Agent addition is 0.1 part.Solvent naphtha
For 120# solvent naphthas, silicone oil host is reactive siloxane polymer (Wa Ke groups, D929), and peeling force additive is silicone tree
Lipoprotein solution (Wa Ke groups, CRA21), crosslinking agent are SiH functional silicones (Wa Ke groups, V60), and catalyst is organic platinum chemical combination
Thing (Wa Ke groups, C05), Anchor Agent are compound organofunctional silicone (Wa Ke groups, HF87)；
Above-mentioned silicon layer is prepared as：After each raw material components of silicon layer are well mixed, propylene is coated on by applicator roll
On sour priming coat, it is heating and curing and forms；Acrylic acid priming coat is prepared as by acrylic compounds glue (7361 Changxing material industry stocks
Part Co., Ltd) it is coated on by applicator roll on base layer, it is heating and curing and forms；The curing and propylene of the solidification of silicon layer
The curing of sour priming coat is identical, carries out as follows：It is solidificated in baking oven and completes, includes connecting successively in baking oven
Eight areas, wherein, the solidification temperature in the firstth area is 75 DEG C, and the solidification temperature in the secondth area is 95 DEG C, the solidification temperature in the 3rd area
For 120 DEG C, the solidification temperature in the 4th area is 140 DEG C, and the solidification temperature in the 5th area is 140 DEG C, and the solidification temperature in the 6th area is 125
DEG C, the solidification temperature of SECTOR-SEVEN is 120 DEG C, and the solidification temperature of Section Eight is 100 DEG C, and during solidification, material is with 62 seconds from the firstth area
Section Eight is at the uniform velocity flowed to successively, and the length in each area is 3m.After first acrylic acid priming coat is solidified, silicon layer is coated with, so
Silicon layer is solidified in a manner of same with acrylic acid priming coat again afterwards.
When processing lithium band, the first mould release membrance and the second mould release membrance are respectively placed in the both sides of lithium band to be processed, pass through silicone oil
Layer fits together with lithium band, and after process finishing, the first mould release membrance forms lithium band composite membrane, the second mould release membrance and lithium band with lithium band
The lithium band composite membrane formed with the first mould release membrance is peeled off.
Off-type force uses FINAT standard testings, Tesa7475 adhesive tapes (wide 25mm), and 180 degree is peeled off.
Remaining then rate uses FINAT standard testings, day east 31B adhesive tape (wide 25mm), and 180 degree is peeled off.
Dry silicon amount is measured using coating weight test machine OX-FORD-3500.
Table 1
In table 1, easily peelable finger mould release membrance is easily peelable, and when lithium band composite membrane is attached on electrode, the first mould release membrance is shelled
From.
Claims (8)
- A kind of 1. mould release membrance combination for being used to process battery grade lithium band, it is characterised in that：It is release including the first mould release membrance and second Film；First mould release membrance includes silicon layer and base layer connected in order, or the first mould release membrance includes silicon layer connected in order, third Olefin(e) acid priming coat and base layer；Second mould release membrance includes silicon layer and base layer connected in order, or the second mould release membrance including suitable Silicon layer, acrylic acid priming coat and the base layer that sequence connects；It is release that the surface roughness of first mould release membrance silicon layer is less than second The surface roughness of film silicon layer.
- 2. the mould release membrance combination as claimed in claim 1 for being used to process battery grade lithium band, it is characterised in that：In first mould release membrance The thickness of acrylic acid priming coat is 0~0.1 μm；The thickness of acrylic acid priming coat is 0~0.1 μm in second mould release membrance.
- 3. the mould release membrance combination as claimed in claim 1 or 2 for being used to process battery grade lithium band, it is characterised in that：Base layer is PET matrix layer, PP base layers, Ge Laxin base layers or non-woven fabrics base layer；The thickness of base layer is 5 μm~150 μm.
- 4. the mould release membrance combination as claimed in claim 3 for being used to process battery grade lithium band, it is characterised in that：Base layer is PET Base layer；The thickness of base layer is 12 μm~50 μm.
- 5. the mould release membrance combination as claimed in claim 1 or 2 for being used to process battery grade lithium band, it is characterised in that：First is release The surface roughness of film silicon layer is 0.001-0.05 μm, and the surface roughness of the second mould release membrance silicon layer is 0.05-0.3 μm.
- 6. the mould release membrance combination as claimed in claim 1 or 2 for being used to process battery grade lithium band, it is characterised in that：First is release The off-type force of silicon layer is 7g/in~30g/in in film, and remaining then rate is 60%~100%, and the dry silicon amount of coating weight is 0.05g/m2~1.5g/m2；The off-type force of silicon layer is 2g/in~10g/in in second mould release membrance, remaining then rate is 40%~ 80%, the dry silicon amount of coating weight is 0.4g/m2~2.0g/m2。
- 7. the mould release membrance combination as claimed in claim 6 for being used to process battery grade lithium band, it is characterised in that：In first mould release membrance The off-type force of silicon layer is 8g/in~12g/in, and remaining then rate is 85%~95%, and the dry silicon amount of coating weight is 0.1g/m2~ 0.3g/m2；The off-type force of silicon layer is 4g/in~6g/in in second mould release membrance, and remaining then rate is 50%~70%, coating It is 0.8g/m to measure dry silicon amount2~1.2g/m2。
- A kind of 8. lithium band composite membrane, it is characterised in that：Including lithium band and the first mould release membrance for being compounded in lithium band wherein one side, first Mould release membrance includes silicon layer and base layer connected in order, or the first mould release membrance includes silicon layer connected in order, acrylic acid bottom Coating and base layer.
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| CN201720922560.1U CN207159127U (en) | 2017-07-27 | 2017-07-27 | A kind of mould release membrance combination for being used to process battery grade lithium band and the lithium band composite membrane prepared by it |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114597331A (en) * | 2020-12-03 | 2022-06-07 | 天津中能锂业有限公司 | Ultrathin lithium film complex and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114597331A (en) * | 2020-12-03 | 2022-06-07 | 天津中能锂业有限公司 | Ultrathin lithium film complex and preparation method thereof |
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