CN104120619A - Method for preparing battery diaphragm paper by using glass fiber and glass wool - Google Patents
Method for preparing battery diaphragm paper by using glass fiber and glass wool Download PDFInfo
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- CN104120619A CN104120619A CN201410308195.6A CN201410308195A CN104120619A CN 104120619 A CN104120619 A CN 104120619A CN 201410308195 A CN201410308195 A CN 201410308195A CN 104120619 A CN104120619 A CN 104120619A
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Abstract
The invention discloses a method for preparing a battery diaphragm paper by using glass fiber and glass wool. The method has the advantages that the battery diaphragm paper is prepared by adopting wet papermaking technique; the characteristics of raw materials are fully exerted; the preparation process is simple and the finished product performance is excellent. The method particularly comprises the following steps: (1) dispersing the glass wool in an acid solution, continuously stirring, adding the glass fiber, stirring, defibering by using a standard defibering machine and adding dispersed binder fiber to obtain uniformly-suspended mixed fiber pulp; (2) transferring the formed paper web to a flat and compact polyester mesh, slightly pressing by using a press roll, putting in a microwave oven and carrying out high fire microwaving for 10-30s; (3) transferring the microwaved wet paper web between two copper wire meshes and drying, wherein the drying method comprises far infrared drying and through air-drying. By adopting the method disclosed by the invention, the excellent performances of the glass fiber and the glass wool can be fully exerted and high-quality battery diaphragm body paper is obtained through the wet papermaking technique and the through air-drying process in special paper preparation.
Description
Technical field
The present invention relates to special fibre wet papermaking field, be specifically related to a kind of method of preparing battery separator paper with glass fibre and glass wool, mainly utilize glass fibre and glass wool to process.
Background technology
Battery separator paper is as the diaphragm material that separates anodal and negative pole in battery, Main Function is to prevent that in battery, positive and negative electrode directly contacts and short circuit, and can allow ion in electrolyte between both positive and negative polarity freely by and electronics can not pass freely through, among the various piece of composition battery, diaphragm material plays the important and pivotal role, and its quality directly affects the key characteristics such as discharge capacity, service life cycle and the charging and discharging currents density of battery.
By glass fiber applications in the manufacture of battery separator paper, the battery separator paper of production, its performance will be better than general battery separator paper, as liquid absorption is higher, rate of liquid aspiration is faster, hydrophily is better etc., and keeps its high pick up at whole life period;
Meanwhile, due to fibreglass diaphragm, to have surface area large, and porosity is high, and aperture is little, and chemical purity is high, and objectionable impurities is few, and the feature such as extraordinary acid resistance, non-oxidizability and little resistance.
But adopt glass fibre to produce battery separator paper and also have many problems, as more weak in glass fibre adhesion, paper strength is low; Crude fibre is too much, although can ensure the intensity of diaphragm paper, absorbent can decline to some extent; Fine fibre is too much, although liquid absorption has improved, intensity can decline again to some extent.
Summary of the invention
The invention provides and a kind of adopt glass fibre and glass wool to mix to manufacture paper with pulp, taking polyvinyl alcohol as binding agent, and adopt wet papermaking technology to prepare the method for battery separator paper, be intended to improve intensity and the absorbent of glass fiber battery membrane paper, preparation process is simple, end properties excellence.
To achieve these goals, technical scheme of the present invention is:
A method of preparing battery separator paper with glass fibre and glass wool, comprises the following steps:
1) take a certain amount of glass fibre, glass wool and vinal, wherein glass fibre, glass wool and vinal parts by mass are than being (45 ~ 60): (40 ~ 55): (3 ~ 15);
2), by the glass wool of 40-55 part, put into acid solution and disperse, and continuous stirring prevents that glass cotton-wool is poly-;
3) in above-mentioned steps 2) in add 45-60 part glass fibre, continue to stir, discongest 4000r-5000r with defiberizing machine, form and discongest mixed liquor;
4) the vinal water of 3 ~ 15 parts is dissolved, be made into the aqueous solution, described vinal, as binding agent, is given paper strength;
5) mixed liquor of discongesting in step 3) is added in the vinal solution having configured in step 4), make the blended fiber slurry of even suspension by glass bar dispersed with stirring;
6) the blended fiber slurry in step 5) is manufactured paper with pulp and obtained wet web in handshcet former after dewatering rapidly, then wet web is dried after processing, obtain battery separator paper.
In a preferred embodiment of the invention, drying method in described step 6): first by wet web microwave baking 10 ~ 60s in micro-wave oven, after microwave treatment, wet web is placed between two copper mesh, and puts into infrared drying oven and be further dried.
In a preferred embodiment of the invention, the mass fraction of the gel content in described wet web is 3-8%.
In a preferred embodiment of the invention, in described step 6) when wet web dehydration forming, stir with glass bar, ensure that there be suitable flowing sizing material forming moment, improve into the surface smoothness of paper.
In a preferred embodiment of the invention, the battery separator paper preparing in described step 6) be quantitatively 50 ~ 60g/m
2.
In a preferred embodiment of the invention, described step 2) in glass wool and the mass ratio of acid solution be 1:(2000 ~ 10000).
By technique scheme, the invention has the beneficial effects as follows:
The present invention can give full play to the excellent properties of glass fibre and glass wool, by the hot blast impingement drying technique in wet papermaking technology and speciality paper preparation, obtains high-quality battery separator paper, can be used as the internal diaphragm material of battery.
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below further set forth the present invention.
Prepare a method for battery separator paper with glass fibre and glass wool, the present invention mainly selects glass fibre, glass wool and vinal as preparing raw material,
Wherein glass wool is a kind of glass fibre that diameter is thinner, in the process of manufacturing paper with pulp, increases the proportioning of glass fibre, can to a certain degree increase into the intensity of paper, but between fiber, space is larger, is difficult to retain electrolyte, thereby is lowered into the absorbency of paper; Increase the proportioning of glass wool, can increase into a certain extent the absorbency of paper, but intensity can decrease.Thereby the proportioning of suitable glass fibre of needs and glass wool, make its intensity and absorbency reach best;
And owing to not containing hydrogen bond between glass fibre, paper strength is low, can only improve paper strength by outer adding additives; For binding agent is evenly distributed in glass fibre and glass wool, the present invention takes to add binding agent to improve the distributing homogeneity of binding agent in paper in the process of manufacturing paper with pulp, because manufacturing paper with pulp of paper is to complete in water environment, now need to use water miscible binding agent, and polyvinyl alcohol has good water-soluble and viscosity, and in the process of manufacturing paper with pulp, easily keep on fiber, after being dried, make can be bonded together between fiber, thereby give the intensity that paper is good.
Specifically comprise the following steps:
1) take a certain amount of glass fibre, glass wool and vinal, wherein glass fibre, glass wool and vinal parts by mass are than being (45 ~ 60): (40 ~ 55): (3 ~ 15);
2), by the glass wool of 40-55 part, put into acid solution and disperse, and continuous stirring prevents that glass cotton-wool is poly-; Step 2) in glass wool and the mass ratio of acid solution be 1:(2000 ~ 10000);
3) in above-mentioned steps 2) in add 45-60 part glass fibre, continue to stir, discongest 4000r-5000r (4000r-5000r refers to that discongesting 4000-5000 turns) with defiberizing machine, form and discongest mixed liquor;
4) the vinal water of 3 ~ 15 parts is dissolved, be made into the aqueous solution, described vinal, as binding agent, is given paper strength;
5) mixed liquor of discongesting in step 3) is added in the vinal solution having configured in step 4), make the blended fiber slurry of even suspension by glass bar dispersed with stirring;
6) the blended fiber slurry in step 5) is manufactured paper with pulp and obtained wet web in handshcet former after dewatering rapidly, then wet web is dried after processing, obtain battery separator paper; The battery separator paper preparing be quantitatively 50 ~ 60g/m
2.
After blended fiber slurry is uniformly dispersed in handshcet former, draining valve is below opened, and draining obtains wet web rapidly, first wet web is put into micro-wave oven microwave baking 10 ~ 60s, after microwave treatment, wet web is placed between two copper mesh, and puts into infrared drying oven and be further dried.
Above-mentioned steps 6) in drying method: first, by wet web microwave baking 10 ~ 60s in micro-wave oven, after microwave treatment, wet web is placed between two copper mesh, and puts into infrared drying oven and be further dried.
Above-mentioned because heating using microwave is by making interior of articles dipole molecule do high-frequency reciprocating motion, produce " interior frictional heat " and heated temperature of charge is raise, material inside and outside portion Synchronous Heating is heated up, there is the advantages such as firing rate is fast and even; Because long meeting drying time makes binding agent generation thermophoresis, reduce binder content in paper, thereby in dry run, first adopt microwave heating treatment, can make paper be dried rapidly, reduce the thermophoresis of binding agent in dry run, thereby reduce the loss of binding agent
The mass fraction of the gel content in described wet web is 3-8%.When wet web dehydration forming, with glass bar stirring, there is suitable turbulence guarantee sizing material forming moment, improves into the surface smoothness of paper.
embodiment 1:
1) take parts by mass than glass fibre, glass wool and vinal for 50:50:7, first 50 parts of glass wools are dispersed in the sulfuric acid solution of pH=2.5, the mass ratio of glass wool and sulfuric acid solution is 1:10000, and continuous stirring prevents that its wadding is poly-; Then add 50 parts of glass fibres, continue to stir, discongest 4000r with standard fibers fluffer, form and discongest mixed liquor;
2) 7 portions of vinal waters that take in step 1) are dissolved, be made into the aqueous solution;
3) after glass fibre and glass wool are discongested end, add step 2) in the vinal solution for preparing, make the blended fiber slurry of even suspension by glass bar dispersed with stirring.
4) blended fiber slurry is manufactured paper with pulp into wet web, gel content is 3%, then by wet web high fiery microwave 20s in micro-wave oven, microwave is placed between two copper mesh, by far-infrared ray drying and high hot blast is two-sided dries up two kinds of drying modes and combine wet web is dried, obtain glass fiber battery membrane paper after dry.
After testing, the battery separator paper paper basis weight obtaining is 50.79g/m
2, thickness 0.235mm, tension stress 18.80N/15mm, inhales ethanol height 99mm/10min, alkalis suction quantity 742.5%.
embodiment 2:
1) take parts by mass than glass fibre, glass wool and vinal for 50:50:9, first 50 parts of glass wools are dispersed in the sulfuric acid solution of pH=2.5, the mass ratio of glass wool and sulfuric acid solution is 1:10000, and continuous stirring prevents that its wadding is poly-; Then add 50 parts of glass fibres, continue to stir, discongest 4000r with standard fibers fluffer;
2) 9 portions of vinal waters that take in step 1) are dissolved, be made into the aqueous solution;
3) after glass fibre and glass wool are discongested end, add step 2) in the vinal solution for preparing, make the blended fiber slurry of even suspension by glass bar dispersed with stirring.
4) blended fiber slurry is manufactured paper with pulp into wet web, gel content is 3.5%, then by wet web high fiery microwave 20s in micro-wave oven, microwave is placed between two copper mesh, afterwards wet web heat being put into baking oven is dried, baking temperature is 105 DEG C, and be 10min drying time, after being dried, obtains glass fiber battery membrane paper.
After testing, the battery separator paper paper basis weight obtaining is 51.10g/m
2, thickness 0.250mm, tension stress 19.12N/15mm, inhales ethanol height 90.5mm/10min, alkalis suction quantity 749.4%.
embodiment 3:
1) take parts by mass than glass fibre, glass wool and vinal for 50:50:11, first 50 parts of glass wools are dispersed in the sulfuric acid solution of pH=2.8, the mass ratio of glass wool and sulfuric acid solution is 1:10000, and continuous stirring prevents that its wadding is poly-; Then add 50 parts of glass fibres, continue to stir, discongest 4000r with standard fibers fluffer;
2) 11 portions of vinal waters that take in step 1) are dissolved, be made into the aqueous solution;
3) after glass fibre and glass wool are discongested end, add step 2) in the vinal solution for preparing, make the blended fiber slurry of even suspension by glass bar dispersed with stirring.
4) blended fiber slurry is manufactured paper with pulp into wet web, gel content is 4.1%, then by wet web high fiery microwave 20s in micro-wave oven, microwave is placed between two copper mesh, afterwards wet web heat being put into baking oven is dried, baking temperature is 110 DEG C, and be 8min drying time, after being dried, obtains glass fiber battery membrane paper.
After testing, the battery separator paper paper basis weight 51.41g/m obtaining
2, thickness 0.237mm, tension stress 22.88N/15mm, inhales ethanol height 93.5mm/10min, alkalis suction quantity 749.4%.
embodiment 4:
1) take parts by mass than glass fibre, glass wool and vinal for 50:50:13, first 50 parts of glass wools are dispersed in the sulfuric acid solution of pH=2.5, the mass ratio of glass wool and sulfuric acid solution is 1:10000, and continuous stirring prevents that its wadding is poly-; Then add 50 parts of glass fibres, continue to stir, discongest 5000r with standard fibers fluffer;
2) 13 portions of vinal waters that take in step 1) are dissolved, be made into the aqueous solution;
3) after glass fibre and glass wool are discongested end, add step 2) in the vinal solution for preparing, make the blended fiber slurry of even suspension by glass bar dispersed with stirring.
4) blended fiber slurry is manufactured paper with pulp into wet web, gel content is 4.8%, and then, by wet web high fiery microwave 20s in micro-wave oven, microwave is placed between two copper mesh, afterwards wet web heat is put into infrared drying oven and be dried, after being dried, obtain glass fiber battery membrane paper.
After testing, the battery separator paper paper basis weight 53.13g/m obtaining
2, thickness 0.243mm, tension stress 25.32N/15mm, inhales ethanol height 92.5mm/10min, alkalis suction quantity 753.4%.
embodiment 5:
1) take parts by mass than glass fibre, glass wool and vinal for 50:50:15, first 50 parts of glass wools are dispersed in the sulfuric acid solution of pH=2.5, the mass ratio of glass wool and sulfuric acid solution is 1:10000, and continuous stirring prevents that its wadding is poly-; Then add 50 parts of glass fibres, continue to stir, discongest 5000r with standard fibers fluffer;
2) 15 portions of vinal waters that take in step 1) are dissolved, be made into the aqueous solution;
3) after glass fibre and glass wool are discongested end, add step 2) in the vinal solution for preparing, make the blended fiber slurry of even suspension by glass bar dispersed with stirring.
4) blended fiber slurry is manufactured paper with pulp into wet web, gel content is 6.8%, then by wet web high fiery microwave 20s in micro-wave oven, microwave is placed between two copper mesh, by far-infrared ray drying and high hot blast is two-sided dries up two kinds of drying modes and combine wet web is dried, obtain glass fiber battery membrane paper after dry.
After testing, the battery separator paper paper basis weight 52.97g/m obtaining
2, thickness 0.249mm, tension stress 23.08N/15mm, inhales ethanol height 99mm/10min, alkalis suction quantity 754.6%.
The present invention gets up glass fibre and glass wool advantages separately, and give its high strength by adding binding agent, the method that it prepares glass fiber battery membrane paper, comprises the dispersing technology of glass fibre and glass wool, adds the dry run of wet web after binding agent.
Select glass fibre and glass wool, adopt the wet method technology of manufacturing paper with pulp, explored suitable papermaking process, manufacture paper with pulp and obtained having the battery separator paper of high strength and good absorbent.
More than show and described general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. a method of preparing battery separator paper with glass fibre and glass wool, is characterized in that, comprises the following steps:
1) take a certain amount of glass fibre, glass wool and vinal, wherein glass fibre, glass wool and vinal parts by mass are than being (45 ~ 60): (40 ~ 55): (3 ~ 15);
2), by the glass wool of 40-55 part, put into acid solution and disperse, and continuous stirring prevents that glass cotton-wool is poly-;
3) in above-mentioned steps 2) in add 45-60 part glass fibre, continue to stir, discongest 4000r-5000r with defiberizing machine, form and discongest mixed liquor;
4) the vinal water of 3 ~ 15 parts is dissolved, be made into the aqueous solution, described vinal, as binding agent, is given paper strength;
5) mixed liquor of discongesting in step 3) is added in the vinal solution having configured in step 4), make the blended fiber slurry of even suspension by glass bar dispersed with stirring;
6) the blended fiber slurry in step 5) is manufactured paper with pulp into wet web, then wet web is dried after processing, obtain battery separator paper.
2. a kind of method of preparing battery separator paper with glass fibre and glass wool according to claim 1, it is characterized in that, drying method in described step 6): first by wet web microwave baking 10 ~ 60s in micro-wave oven, after microwave treatment, wet web is placed between two copper mesh, and puts into infrared drying oven and be further dried.
3. a kind of method of preparing battery separator paper with glass fibre and glass wool according to claim 1, is characterized in that, the mass fraction of the gel content in described wet web is 3-8%.
4. a kind of method of preparing battery separator paper with glass fibre and glass wool according to claim 1, it is characterized in that, in described step 6) when wet web dehydration forming, stir with glass bar, there be suitable flowing guarantee sizing material forming moment, and improves into the surface smoothness of paper.
5. a kind of method of preparing battery separator paper with glass fibre and glass wool according to claim 1, is characterized in that, the battery separator paper preparing in described step 6) be quantitatively 50 ~ 60g/m
2.
6. a kind of method of preparing battery separator paper with glass fibre and glass wool according to claim 1, is characterized in that described step 2) in glass wool and the mass ratio of acid solution be 1:(2000 ~ 10000).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410308195.6A CN104120619A (en) | 2014-07-01 | 2014-07-01 | Method for preparing battery diaphragm paper by using glass fiber and glass wool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410308195.6A CN104120619A (en) | 2014-07-01 | 2014-07-01 | Method for preparing battery diaphragm paper by using glass fiber and glass wool |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421135A (en) * | 2015-11-30 | 2016-03-23 | 陕西科技大学 | Plant fiber/waste FPR composite material and preparation method thereof |
| CN110318286A (en) * | 2019-07-02 | 2019-10-11 | 陕西科技大学 | A kind of preparation method of Halogen sound-absorbing and flame-retardant paper |
| CN112681009A (en) * | 2020-12-25 | 2021-04-20 | 华南理工大学 | Paper-based high-temperature-resistant composite material and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4522876A (en) * | 1984-07-05 | 1985-06-11 | Lydall, Inc. | Integral textile composite fabric |
| CA2302419C (en) * | 1997-09-02 | 2005-11-01 | Kvg Technologies, Inc. | Glass fiber separators and batteries including such separators |
| CN102496689A (en) * | 2011-12-21 | 2012-06-13 | 山东瑞宇蓄电池有限公司 | Hybrid glass fiber diaphragm for storage battery as well as method and system for manufacturing hybrid glass fiber diaphragm |
-
2014
- 2014-07-01 CN CN201410308195.6A patent/CN104120619A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4522876A (en) * | 1984-07-05 | 1985-06-11 | Lydall, Inc. | Integral textile composite fabric |
| CA2302419C (en) * | 1997-09-02 | 2005-11-01 | Kvg Technologies, Inc. | Glass fiber separators and batteries including such separators |
| CN102496689A (en) * | 2011-12-21 | 2012-06-13 | 山东瑞宇蓄电池有限公司 | Hybrid glass fiber diaphragm for storage battery as well as method and system for manufacturing hybrid glass fiber diaphragm |
Non-Patent Citations (2)
| Title |
|---|
| 周彤: ""玻璃纤维在造纸法薄页基材中的应用研究"", 《中国学位论文全文数据库 工程科技Ⅰ辑》 * |
| 张美云: "《加工纸与特种纸》", 31 January 2011 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421135A (en) * | 2015-11-30 | 2016-03-23 | 陕西科技大学 | Plant fiber/waste FPR composite material and preparation method thereof |
| CN110318286A (en) * | 2019-07-02 | 2019-10-11 | 陕西科技大学 | A kind of preparation method of Halogen sound-absorbing and flame-retardant paper |
| CN112681009A (en) * | 2020-12-25 | 2021-04-20 | 华南理工大学 | Paper-based high-temperature-resistant composite material and preparation method and application thereof |
| CN112681009B (en) * | 2020-12-25 | 2021-10-26 | 华南理工大学 | Paper-based high-temperature-resistant composite material and preparation method and application thereof |
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