CN108035142A - A kind of new coating non-woven fabrics and preparation method thereof - Google Patents
A kind of new coating non-woven fabrics and preparation method thereof Download PDFInfo
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- CN108035142A CN108035142A CN201711228356.0A CN201711228356A CN108035142A CN 108035142 A CN108035142 A CN 108035142A CN 201711228356 A CN201711228356 A CN 201711228356A CN 108035142 A CN108035142 A CN 108035142A
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- woven fabrics
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- 238000000576 coating method Methods 0.000 title claims abstract description 85
- 239000011248 coating agent Substances 0.000 title claims abstract description 82
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 67
- 239000002245 particle Substances 0.000 claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000004744 fabric Substances 0.000 claims abstract description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005524 ceramic coating Methods 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000002562 thickening agent Substances 0.000 claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 239000002904 solvent Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000000243 solution Substances 0.000 claims description 21
- 102220043159 rs587780996 Human genes 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- 229920000178 Acrylic resin Polymers 0.000 claims description 13
- 239000004925 Acrylic resin Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 5
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910001593 boehmite Inorganic materials 0.000 claims description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 14
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 13
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 10
- 230000035699 permeability Effects 0.000 abstract description 9
- 239000006255 coating slurry Substances 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 38
- 239000006185 dispersion Substances 0.000 description 21
- 239000007788 liquid Substances 0.000 description 15
- 238000003756 stirring Methods 0.000 description 15
- -1 polyethylene Polymers 0.000 description 10
- 230000008602 contraction Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 239000002105 nanoparticle Substances 0.000 description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 7
- 238000007611 bar coating method Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910002706 AlOOH Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 102000004895 Lipoproteins Human genes 0.000 description 1
- 108090001030 Lipoproteins Proteins 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229920006321 anionic cellulose Polymers 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000001458 anti-acid effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/45—Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
- D06M15/05—Cellulose or derivatives thereof
- D06M15/09—Cellulose ethers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cell Separators (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The present invention relates to lithium ion battery preparation field, more particularly to a kind of new coating non-woven fabrics and preparation method thereof.A kind of slurry for being used to prepare coating non-woven fabrics ceramic coating, by weight, including following component：35 41 parts of filler；56 parts of binding agent；0.4 0.8 parts of dispersant；0.8 1.0 parts of thickener；50 60 parts of solvent.Inventor has found, coating sizing-agent needs accurately to choose alumina powder, the size of alumina powder grain diameter, there is delicate influence to the quality of the gas permeability of coating, after inventor has carried out a large amount of screening experiments to the grain diameter of alumina powder, choose big small particle and converged according to a certain percentage, coating slurry is being made, non-woven fabrics base material is coated, reaches coating non-woven cloth products of good performance.
Description
Technical field
The present invention relates to lithium ion battery preparation field, more particularly to a kind of new coating non-woven fabrics and its preparation side
Method.
Background technology
Lithium ion battery is a kind of secondary cell (rechargeable battery), it relies primarily on lithium ion and moves between a positive electrode and a negative electrode
Move and carry out work.In charge and discharge process, Li+Round-trip insertion and deintercalation between two electrodes：During charging, Li+From cathode deintercalation,
Anode is embedded in by electrolyte, anode is in rich lithium state；It is then opposite during electric discharge.
At present, we are generally polyethylene or polypropylene diaphragm in the lithium ion battery separator that modernized society uses,
Such membrane has the performance such as preferable anti acid alkali performance, higher tensile strength, porosity, but there is also certain to ask
Topic, it is well known that the polyethylene or the heat resistance of polypropylene diaphragm and resistance to sparking used now is not fine, in 120-
160 degree of thermal contractions are all poor, so we use polyethylene terephthalate membrane, poly terephthalic acid second two now
Alcohol ester base material has a good heat resistance, but there is also it is certain the defects of, our all non-woven fabrics base materials on the market, gas permeability
All close to zero, if only being accomplished that very big security risk can occur in lithium ion battery with this non-woven fabrics base material, for example follow
Phenomena such as ring is poor, short-circuit, explosion.It is therefore necessary to do to improve to polyethylene terephthalate non-woven fabrics base material, with
To a kind of new coating non-woven cloth products, and there are good gas permeability and preferably physicochemical property, meet customer need.
Since simple substrate performance is often unable to reach the superperformance of coated film, such as heat resistance, resistance to sparking etc.,
So more and more battery enterprises are turned one's attention to above coated film.It is a kind of porous plastic film to apply cloth diaphragm,
Its water imbibition is very big, so commonly applying, cloth diaphragm moisture value is bigger, and client needs to use after being toasted, with reduction pair
The influence of battery performance, such client can expend very big cost in membrane baking.Inside lithium ion cell be one more
Complicated chemical system, the reaction process and result of these chemical systems are all closely related with moisture.Moisture exceedes certain numerical value,
The chemical property of lithium ion battery is directly affected, influences the uniformity of lithium ion battery internal resistance.
In existing coated film, although being coated with one layer or two-layer ceramic slurry, coated product on coating film base material
Properties can not still meet the needs of battery, such as, thermal contraction performance is poor, gas permeability is excessive, moisture value all compares
It is high.So it is badly in need of preparing a kind of new coating non-woven cloth products to meet the requirement in market.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide one kind to be used to prepare new coating nothing
The slurry of woven fabric ceramic coating, for solving the problems of the prior art.
In order to achieve the above objects and other related objects, the present invention provides one kind and is used to prepare coating non-woven fabrics ceramic coating
Slurry, by weight, including following component：
In the application some embodiments, the filler be selected from nano aluminium oxide (α-Al2O3), boehmite (γ-
AlOOH, hydrated alumina) in one or more combinations.In slurry provided herein, filler primarily can be used for
Increase coating layer thickness, and improve base material gas permeability and thermal contraction performance.
In the application some embodiments, D50=0.9-1.1 μm of bulky grain particle diameter in the filler, little particle grain
D50=0.5-0.7 μm of footpath.
In the application some embodiments, bulky grain part and the mass ratio of little particle part are 1.5-2.5:1, preferably
For 1.8-2.2:1, more preferably 1.9-2.1:1.
In the application some embodiments, the binding agent is selected from water-based acrylic resin solution, is preferably water-based third
Olefin(e) acid resin aqueous solution.In the water-based acrylic resin solution, solid content 40-50wt%, the number of acrylic resin is divided equally
Son amount is 1-20 ten thousand.In slurry provided herein, binding agent primarily can be used for so that filler and base material bond/
Adhesion.
In the application some embodiments, the dispersant is selected from high-molecular block copolymer, more specifically polypropylene
The copolymer of hydrochlorate and polycarboxylate, particle footpath 90% is below 2 μm, pH value 7-8.5, and solid content 41.5%~
43.5wt%, viscosity are 300~450mPas, and the copolymer of the polyacrylate and polycarboxylate belongs to anionic point
Powder.In slurry provided herein, the dispersant is mainly used for being to increase the dispersing uniformity of each component in water.
In the application some embodiments, the thickener is selected from sodium carboxymethylcellulose class particle, is more specifically selected from
Sodium carboxymethylcellulose (CMC) particle, sodium carboxymethylcellulose (CMC) the seed activity thing content (dry weight) >=99.5%,
Sodium content 6.5%~9.5%, substitution value 0.85~0.95, particle size is in 150~200nm.The sodium carboxymethylcellulose category
Anionic cellulose ethers, is soluble in cold water or hot water, forms glue, and solution is neutral or alkalescence.It is provided herein
Slurry in, the thickener is mainly used for being increase slurry viscosity so that each component can uniform and stable distribution.
In the application some embodiments, the solvent is selected from pure water.In slurry provided herein, the solvent
It is mainly used for providing so that each component dispersed environment in water.
In the application some embodiments, the solid content of the slurry is 38-43%.
The preparation method of the slurry of coating non-woven fabrics ceramic coating is provided described in the offer of the application second aspect, it is described
Preparation method includes：Each component is mixed by formula, up to the slurry.
In the application some embodiments, the preparation method includes：Dispersant is uniformly mixed with solvent, then will be increased
Thick dose, filler be dispersed in solution, resulting solution is uniformly mixed with binding agent, up to the slurry.
The application third aspect provides a kind of coating non-woven fabrics ceramic coating, and coating non-woven fabrics ceramics are used to prepare by described
The slurry of coating prepares, including：Slurry is coated with, coating described in drying.
In the application some embodiments, coating is coated on to the side or both sides of non-woven fabrics base material.
In the application some embodiments, the non-woven fabrics base material is selected from polyethylene terephthalate (PET), thick
Spend for 14-16 μm, breathe freely value≤1S/100cc, it is preferred that the ventilative value is substantially 0S/100cc.
In the application some embodiments, the drying temperature is 100-105 DEG C.
In the application some embodiments, coating method is bar coating.Usual painting method has：Brush,
Spraying, dip-coating and flow coat etc., the mode such as dip-coating has the defects of obvious, these methods need have roller to carry out coated product below
Compacting, to obtain needing the non-woven fabrics coated product of coating layer thickness, but carries out in extrusion process coated product, coating can break
Split, form fault-layer-phenomenon, phenomena such as physicochemical property may being caused inconsistent, accomplish to be formed in battery follow bad property it is poor,
Phenomena such as internal resistance is inconsistent, the reduction of discharge and recharge number.So non-woven fabrics coated product uses a kind of special coating in the application
Mode, i.e. bar coat, and the bar coating is often referred to the method being coated using bar coating machine, and bar coating can be double
Face coats at the same time, and significantly use manpower and material resources sparingly financial resources, lifts coating efficiency, and coats the coating obtained and avoid the occurrence of
State defect.
The application fourth aspect provides a kind of coating non-woven fabrics, including non-woven fabrics base material, is coated with the non-woven fabrics base material
There is the coating non-woven fabrics ceramic coating.
In the application some embodiments, the one side of the non-woven fabrics base material or both sides are coated with the coating nonwoven
Cloth ceramic coating, the thickness of ceramic coating is 4.2~5.8 μm.
In the application some embodiments, the non-woven fabrics base material is selected from polyethylene terephthalate (PET), thick
Spend for 14-16 μm, breathe freely value≤1S/100cc, it is preferred that the ventilative value is substantially 0S/100cc.
Non-woven fabrics coated product present in society now, it is very few applied to lacking for lithium battery industry, because it is ventilative
Property is almost nil.It is well known that for Ni-MH battery, if the gas permeability of membrane is bad, cathode produces during over-charging of battery oxygen
Gas possibly can not by it is quick it is compound fall, cause inner pressure of battery to raise, will be from safety valve after inner pressure of battery rise reaches certain value
Pressure release is so as to cause the loss of electrolyte.If i.e. bad for the gas permeability of lithium battery membrane, lithium ion will be influenced positive and negative
The discharge and recharge for then influencing lithium battery is transmitted between pole.So domestic enterprise accomplishes with fine air permeability and physics and chemistry now
The coating non-woven cloth products of energy still have certain difficulty.Inventor has found after a large amount of creative experiments, applies
The stringent preparation of formula of size is covered, great influence is directly played to the performance of slurry and its coating prepared.The present invention
In the slurry for being used to prepare coating non-woven fabrics ceramic coating provided and its coating non-woven fabrics prepared, to preparing
Coating non-woven fabrics performance influence depend on formula in each component an optimal proportioning parameter.Inventor sends out
Existing, coating sizing-agent needs accurately to choose alumina powder, the size of alumina powder grain diameter, to the saturating of coating
The quality of gas has after delicate influence, inventor carried out a large amount of screening experiments to the grain diameter of alumina powder,
Choose big small particle according to a certain percentage to be converged, coating slurry is being made, non-woven fabrics base material is coated, is reaching performance
Good coating non-woven cloth products.
Embodiment
Fig. 1 show the application and coats non-woven fabrics grain structure side view.
Fig. 2 show the application and coats non-woven fabrics grain structure top view.
Fig. 3 show the application and coats non-woven fabrics grain structure nonwoven fabric base face SEM photograph.
Fig. 4 show the application and coats non-woven membrane film surface SEM photograph.
Component label instructions
1 bulky grain
2 little particles
3 non-woven fabrics base materials
4 size particles mix
5 non-woven fabrics base materials
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
It should be clear that in the following example not specifically dated process equipment or device using conventional equipment in the art or
Device.
In addition, it should also be understood that, one or more method and step mentioned in the present invention does not repel before and after the combination step
Other methods step can also can also be inserted into there are other methods step or between the step of these are specifically mentioned, unless separately
It is described；It should also be understood that the combination connection relation between one or more equipment/device mentioned in the present invention is not repelled
The two equipment/devices that can also be specifically mentioned before and after the unit equipment/device there are other equipment/device or at these it
Between can also be inserted into other equipment/device, unless otherwise indicated.Moreover, unless otherwise indicated, the numbering of various method steps is only
Differentiate the convenient tool of various method steps, rather than ordering or the enforceable model of the restriction present invention for limitation various method steps
Enclose, its relativeness is altered or modified, and in the case where changing technology contents without essence, when being also considered as, the present invention is enforceable
Category.
Embodiment 1
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powders (big
Grain：Little particle=1：0, here 0 refer to only addition a bulky grain, do not add little particle) be added in solution, be made into slurries A, will
Slurries A carries out high speed dispersion, takes the water-based acrylic resin solution (model that molecular weight is 7-20 ten thousand, solid content is 45%：BYK-
22346, supplier：BYK) 2kg is added in the slurries after disperseing, and is sufficiently stirred, after stirring evenly, such slurry is just
Prepare and complete, the size particles particle size, D50=1.0 μm of bulky grain particle diameter, D50=0.6 μm of little particle particle diameter；
B) non-woven fabrics base material (softening point of 15 μ m thicks is taken：238-240 DEG C, 255-260 DEG C of fusing point, intrinsic viscosity
(0.63-0.66), PET non-woven fabrics have hole, similarly hereinafter), using bar coating method, (Japanese holt lithium battery diaphragm is accurate
Coating machine) slurry is coated in the both sides of non-woven fabrics base material, coating speed 80m/min is floated using Pyatyi into baking oven
Baking oven is dried, and oven temperatures at different levels are respectively 100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry, you can
To new coating non-woven cloth products, the thickness of the coating non-woven fabrics base material is 15 μm, and total coating thickness is 5 μm of (i.e. both sides
Each 2.5 μm).
Embodiment 2
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powders (big
Grain：Little particle=0：1, here 0 refer to an only addition little particle, do not add bulky grain, form blank) be added to solution
In, slurries A is made into, slurries A is subjected to high speed dispersion, takes the water soluble acrylic acid tree that molecular weight is 7-20 ten thousand, solid content is 45%
Lipoprotein solution (model：BYK-22346, supplier：BYK) 2kg is added in the slurries after disperseing, and is sufficiently stirred, and stirring is equal
After even, such slurry just prepares completion, the size particles particle size, D50=0.9 μm -1.3 μm of bulky grain particle diameter,
D50=0.5 μm -0.7 μm of little particle particle diameter；
B) non-woven fabrics base material of 15 μ m thicks is taken, slurry is coated in the two of non-woven fabrics base material using bar coating method
Side, coating speed 80m/min, into baking oven, is dried, oven temperatures at different levels are respectively using the floated baking oven of Pyatyi
100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry, you can obtain new coating non-woven cloth products, the coating
The thickness of non-woven fabrics base material is 15 μm, and total coating thickness is 5 μm (i.e. each 2.5 μm of both sides).
Embodiment 3
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powders (big
Grain：Little particle=1：2) it is added in solution, is made into slurries A, slurries A is subjected to high speed dispersion, takes molecular weight for 7-20 ten thousand, contains admittedly
Measure the water-based acrylic resin solution (model for 45%：BYK-22346, supplier：BYK) 2kg is added in the slurries after disperseing,
Sufficiently stirred, after stirring evenly, such slurry just prepares completion, the size particles particle size, bulky grain
D50=0.9 μm -1.3 μm of particle diameter, D50=0.5 μm -0.7 μm of little particle particle diameter；
B) non-woven fabrics base material of 15 μ m thicks is taken, slurry is coated in the two of non-woven fabrics base material using bar coating method
Side, coating speed 80m/min, into baking oven, is dried, oven temperatures at different levels are respectively using the floated baking oven of Pyatyi
100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry, you can obtain new coating non-woven cloth products, the coating
The thickness of non-woven fabrics base material is 15 μm, and total coating thickness is 5 μm (i.e. each 2.5 μm of both sides).
Embodiment 4
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powders (big
Grain：Little particle=2：1) it is added in solution, is made into slurries A, slurries A is subjected to high speed dispersion, takes molecular weight for 7-20 ten thousand, contains admittedly
The water-based acrylic resin solution 2kg measured as 45% is added in the slurries after disperseing, and is sufficiently stirred, stirs evenly it
Afterwards, such slurry just prepares completion, the size particles particle size, D50=0.9 μm -1.3 μm, small of bulky grain particle diameter
D50=0.5 μm -0.7 μm of particle diameter of grain；
B) non-woven fabrics base material of 15 μ m thicks is taken, slurry is coated in the two of non-woven fabrics base material using bar coating method
Side, coating speed 80m/min, into baking oven, is dried, oven temperatures at different levels are respectively using the floated baking oven of Pyatyi
100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry, you can obtain new coating non-woven cloth products, the coating
The thickness of non-woven fabrics base material is 15 μm, and total coating thickness is 5 μm (i.e. each 2.5 μm of both sides).
Comparative example 1
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powder (sizes
Grain 1：1 mixing) it is added in solution, slurries A is made into, slurries A is subjected to high speed dispersion, to take molecular weight be 7-20 ten thousand, solid content is
45% water-based acrylic resin solution (model：BYK-22346, supplier：BYK) 2kg is added in the slurries after disperseing, and is carried out
Sufficiently stirring, after stirring evenly, such slurry just prepares completion, the size particles particle size, bulky grain particle diameter
D50=0.9 μm -1.3 μm, D50=0.5 μm -0.7 μm of little particle particle diameter；
B) non-woven fabrics base material of 15 μ m thicks is taken, slurry is coated in the two of non-woven fabrics base material using bar coating method
Side, coating speed 80m/min, into baking oven, is dried, oven temperatures at different levels are respectively using the floated baking oven of Pyatyi
100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry, you can obtain new coating non-woven cloth products, the coating
The thickness of non-woven fabrics base material is 15 μm, and total coating thickness is 5 μm (i.e. each 2.5 μm of both sides).
Above the embodiment of the present invention and comparative example coating non-woven cloth products performance are tested, data see the table below 1：
Table 1
As shown in Table 1,1 moisture value of embodiment has lifted (moisture is more low better), and 2 thermal contraction of embodiment has been lifted,
3 thermal contraction of embodiment and moisture value have been lifted, and embodiment 4 is on ventilative value, unit coating surface density, thermal contraction, moisture value
An optimal parameter value is all reached.Embodiment 4 is compared with other several groups, in ventilative, unit coating surface density, thermal contraction
And having a preferable lifting on moisture value, obtained physical property is optimal.
Embodiment 5
For different coating methods, it is floated baking oven to choose one kind below, and bar coating, another kind is guide rolls support
Formula, the coating of nick roller, painting parameter is consistent, and upper table comparing result embodiment 4 coats non-woven cloth products best performance, therefore chooses
Embodiment 4 as a comparison case 2 basis, equal wet end furnish parameter, is coated.
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powders (big
Grain：Little particle=2：1) it is added in solution, is made into slurries A, slurries A is subjected to high speed dispersion, takes molecular weight for 7-20 ten thousand, contains admittedly
Measure the water-based acrylic resin solution (model for 45%：BYK-22346, supplier：BYK) 2kg is added in the slurries after disperseing,
Sufficiently stirred, after stirring evenly, such slurry just prepares completion, the size particles particle size, bulky grain
D50=0.9 μm -1.3 μm of particle diameter, D50=0.5 μm -0.7 μm of little particle particle diameter；
B) non-woven fabrics base material of 15 μ m thicks is taken, (Shenzhen Xin Jia opens up automatic technology using nick roller coating method
Co., Ltd) slurry is coated in the one side of non-woven fabrics base material, coating speed 80m/min, into baking oven, using Pyatyi deflector roll
Brace type baking oven is dried, and oven temperatures at different levels are respectively 100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry,
New coating non-woven cloth products are can obtain, the thickness of the coating non-woven fabrics base material is 15 μm, and coating layer thickness is 5 μm.
Comparative example 2
A) dispersant (model of 0.22Kg is weighed：SN5040, supplier：Guangzhou Hui Xiang Chemical Co., Ltd.s) it is added to
It is uniformly dispersion liquid to be stirred in the pure water of 20Kg to being completely dispersed, and takes 0.33Kg thickener (models:CMC1220, supplier：Soviet Union
Zhou Fosai new materials Co., Ltd) it is added in dispersion liquid, after stirring evenly, then take 15.82kg Nano-sized Alumina Powders (big
Grain：Little particle=2：1) it is added in solution, is made into slurries A, slurries A is subjected to high speed dispersion, takes molecular weight for 7-20 ten thousand, contains admittedly
Measure the water-based acrylic resin solution (model for 45%：BYK-22346, supplier：BYK) 2kg is added in the slurries after disperseing,
Sufficiently stirred, after stirring evenly, such slurry just prepares completion, the size particles particle size, bulky grain
D50=0.9 μm -1.3 μm of particle diameter, D50=0.5 μm -0.7 μm of little particle particle diameter；
B) non-woven fabrics base material of 15 μ m thicks is taken, slurry is coated in the two of non-woven fabrics base material using bar coating method
Side, coating speed 80m/min, into baking oven, is dried, oven temperatures at different levels are respectively using the floated baking oven of Pyatyi
100 DEG C, 102 DEG C, 105 DEG C, 102 DEG C, 100 DEG C, after dry, you can obtain new coating non-woven cloth products, the coating
The thickness of non-woven fabrics base material is 15 μm, and coating layer thickness is 5 μm.
Above the embodiment of the present invention and comparative example coating non-woven cloth products performance are tested, data see the table below 2：
Table 2
Bar coating can get a desired effect inside and outside non-woven fabrics, when passing through bar due to non-woven fabrics, slurry
Liquid can be uniformly adhered on non-woven fabrics, and there is a little particle entrance in inside, exterior then have bulky grain covering, and concrete form can join
According to Fig. 1 and Fig. 2, into after oven for drying, non-woven fabrics coated product of good performance is obtained.In contrast, due to nick roller
When coating non-woven fabrics, slurries can ooze coated side, cause slurries to leak down, and cause slurries to be effectively adhered to non-woven fabrics film surface
On, it is impossible to reach effective coating purpose.
The embodiment of the present invention is can be seen that from the data in upper table 1, table 2 to contrast with comparative example, ceramic particle particle diameter
Size is different, and each performance of coating non-woven cloth products differs all bigger, the best performance of embodiment 4, either saturating
There is a larger improvement on air and heat contraction and moisture value；Equal wet end furnish parameter, different coating methods, gained
Coating non-woven cloth products moisture value, unit coating surface density and the thermal contraction arrived are suitable, but gas permeability difference is larger, comprehensive
Each case study on implementation, embodiment 4 are optimized parameter, and gained coating non-woven cloth products performance is optimal, is well suited for needed for lithium ion battery
Performance, preferably performance makes it be more in line with our daily production applications, meets each customer demand.
In conclusion the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of slurry for being used to prepare coating non-woven fabrics ceramic coating, by weight, including following component：
2. slurry as claimed in claim 1, it is characterised in that the filler in nano aluminium oxide, boehmite one
Kind or a variety of combinations, D50=0.9-1.1 μm of bulky grain particle diameter in the filler, D50=0.5-0.7 μm of little particle particle diameter,
Bulky grain part and the mass ratio of little particle part are 1.5-2.5:1, it is preferably 1.8-2.2:1, more preferably 1.9-2.1:1.
3. slurry as claimed in claim 1, it is characterised in that the binding agent is selected from water-based acrylic resin solution, preferably
For water-based acrylic resin aqueous solution, in the water-based acrylic resin solution, solid content 40-50wt%, acrylic resin
Number-average molecular weight be 1-20 ten thousand.
4. slurry as claimed in claim 1, it is characterised in that the dispersant is selected from being total to for polyacrylate and polycarboxylate
Polymers, particle footpath 90% is below 2 μm, pH value 7-8.5,41.5%~43.5wt% of solid content, viscosity for 300~
450mPa·s。
5. slurry as claimed in claim 1, it is characterised in that the thickener is selected from sodium carboxymethylcellulose particle, described
Sodium carboxymethylcellulose seed activity thing content >=99.5%, sodium content 6.5%~9.5%, substitution value 0.85~0.95, particle diameter
Size is in 150~200nm.
6. slurry as claimed in claim 1, it is characterised in that the solvent is selected from pure water.
7. slurry as claimed in claim 1, it is characterised in that the solid content of the slurry is 38-43%.
8. the preparation side of the slurry for being used to prepare coating non-woven fabrics ceramic coating as described in claim 1-7 any claims
Method, the preparation method include：Each component is mixed by formula, up to the slurry.
9. one kind coating non-woven fabrics ceramic coating, as being used to prepare coating nonwoven described in claim 1-7 any claims
The slurry of cloth ceramic coating prepares.
10. one kind coats non-woven fabrics, including non-woven fabrics base material, the painting described in claim 9 is coated with the non-woven fabrics base material
Cover non-woven fabrics ceramic coating.
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