CN1704529A - Low closeness paper for electrolytic capacitor - Google Patents
Low closeness paper for electrolytic capacitor Download PDFInfo
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- CN1704529A CN1704529A CN 200410024716 CN200410024716A CN1704529A CN 1704529 A CN1704529 A CN 1704529A CN 200410024716 CN200410024716 CN 200410024716 CN 200410024716 A CN200410024716 A CN 200410024716A CN 1704529 A CN1704529 A CN 1704529A
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Abstract
This invention provides a kind of paper with special use, especially in low-tightness electrolytic capacitor and diaphragm cells, which at least comprises two fibers: one is aromatic polyamide fiber, other is bio-cellulose fiber, the former used as frame of paper, weighing 20%-65% of amount, the latter filled among aromatic polyamide fibers, weighing 35%-80%. The invention has advantages of low-tightness, absorbent quality, and improves electric property of electrolytic capacitor and cells and increases service life.
Description
Technical field
The present invention relates to the paper of specific use, relate in particular to a kind of low tightness electrolytic capacitor paper.
Background technology
Electrolytic capacitor or electrolytic cell structurally are that folder advances one deck paper or nonwoven fabric between two metal formings, and reel back dipping or dropping electrolyte are installed in the enclosure then.For this class electrolytic capacitor or battery, the characteristic of the paper wherein of reeling is very big to the influence of capacitor or battery performance, particularly requires the impedance of paper must be very low, reach above-mentioned requirements, and the one, the tightness of paper is low as much as possible; The 2nd, select good hygroscopicity for use, the fiber that performance of keeping humidity is strong makes paper can adsorb electrolyte as much as possible, and the thickness of paper also is to get over Bao Yuehao simultaneously.But tightness is low, the intensity of the paper of thin thickness, good hygroscopicity can reduce a lot, ruptures easily when reeling, and the short circuit ratio of capacitor or battery is significantly risen.
At present, when the tightness electrolytic paper is hanged down in manufacturing, generally use the little grass of Spain, abaca or some viscoses to make raw material.In order to reach certain intensity, must process pull an oar, and the paper that little grass of Spain after the making beating or manila hemp fiber are copied, tightness is just low does not go down, generally more than 0.35g/cm3, if subside, the intensity of paper is just bad again, when reeling, paper can be given birth to phenomenon of rupture than acred, and the paper of being copied by little grass of Spain or abaca, and is low to 0.40g/cm3 when following in tightness, the not anti-burr of the utmost point can make the short circuit ratio of capacitor sharply rise.Equally, for battery separator paper, the low tightness of paper also is crucial, and low tightness can make the absorbent properties of paper better, and the battery capacity of making is bigger, but the same with electrolytic paper, and the paper tightness can bring the intensity of paper bad, and the battery short circuit rate can rise.
Summary of the invention
To the objective of the invention is the deficiency that exists in the above-mentioned background technology in order solving, to provide a kind of tensile strength good, the low tightness electrolytic capacitor paper that anti-burr property is strong.
Technical scheme of the present invention is as follows: a kind of low tightness electrolytic capacitor paper, it comprises at least two kinds of fibers, a kind of is aramid fibre (abbreviation aramid fiber), another kind is the biological fiber cellulose fiber, aramid fiber accounts for the 20%-65% (mass percent) of paper fiber total amount as the skeleton of paper, and the biological fiber cellulose fiber riddles between the aramid fiber, account for the 35%-80% (mass percent) of paper fiber total amount, all the other can add other fiber that does not damage electric property.
For guaranteeing the quality of low tightness electrolytic capacitor with paper, in two kinds of above-mentioned fibers, aramid fibre accounts for the 35%-60% (mass percent) of paper fiber total amount, and the biological fiber cellulose fiber accounts for the 40%-65% (mass percent) of paper fiber total amount.Better scope is: aramid fibre accounts for the 45%-55% (mass percent) of paper fiber total amount, and the biological fiber cellulose fiber accounts for the 45%-55% (mass percent) of paper fiber total amount, and all the other can add other fiber that does not damage electric property.
Above-mentioned aramid fiber has at least two annular protrusions that stretch out from the staple fibre circumferential surface, and projection separates each other, and the mean ratio of the maximum gauge R of annular protrusion and aramid fiber short fibre ringless-type bossing minimum diameter r is 1.1 or bigger.The fiber number of aramid fiber is the 1--4 dawn.The biological fiber cellulose fiber is produced by acetobacter xylinum, acetobacter xylinum generates 6-glucose 1-phosphate1-, 1-carbonic acid glucose and uridine-5 with the glucose process, a series of biochemical reaction synthetic celluloses such as-diphosphate glucose, oozy inferior fubril from the duct of cell membrane, controlling inferior fubril, to be connected to form diameter with hydrogen bond be 10 μ m-30 μ m, the filament of length between 2mm-20mm, to be suitable for papermaking.
A kind of low tightness electrolytic capacitor of the present invention with the beneficial effect of paper is: solved in the prior art electrolytic capacitor with the contradiction between paper and battery separator paper intensity and the tightness, on intensity, satisfy the requirement of up-coiler to paper strength, when reeling, be not easy fracture, there is not hole on the page, anti-burr property is splendid, has also simultaneously that tightness is low, the characteristics of good hygroscopicity.The capacitor made from it and the short circuit ratio of battery are low, and have stronger imbibition ability, have improved the electrolytic capacitor electric property, reduce the energy consumption of electrolytic capacitor, during as battery separator paper, can improve the capacity of battery.And prolonged the life-span.
The specific embodiment
The invention will be further described below by embodiment, but the present invention is not limited by embodiment.Embodiment and reference example are example with the electrolytic capacitor.
The used aramid fiber market of the embodiment of the invention is on sale, as the Guangzhou.It has at least two annular protrusions that stretch out from the staple fibre circumferential surface, and projection separates each other.The mean ratio of the maximum gauge R of annular protrusion and aramid fiber short fibre ringless-type bossing minimum diameter r is 1.1 or bigger.The fiber number of aramid fiber is all available from 1 dawn to 4 dawn.Too thick as fruit fiber, will influence the evenness of page and the internal resistance of electrolytic capacitor; Too thin as fruit fiber, will influence the supporting role of aramid fiber as fibrous skeleton.Staple fibre with annular protrusion can be by intermittently changing the preparation of melt spinning and drawing process, the resin fusion by spinnerets rate of extrusion and melt-spinning technology in the tension force of elongate filaments and the draw ratio in the drawing process produce, perhaps, cause cut fiber two ends because the snapback phenomenon formation annular protrusion of fiber is produced by to cutting off the long filament that stretches.
The used biological fiber cellulose fiber of the embodiment of the invention is to be produced by acetobacter xylinum.Acetobacter xylinum can be with glucose through generating 6-glucose 1-phosphate1-, 1-carbonic acid glucose and uridine-5, a series of biochemical reaction synthetic celluloses such as-diphosphate glucose, acetobacter xylinum is when ventilation is stirred or leave standstill cultivation, can secrete the minimum that parallels with the cell longitudinal axis in the one round road of bacteria cell wall and constitute unit---inferior fubril, these one by one diameter be that the inferior fubril of 1.78nm is parallel to each other, be connected to form the filament that diameter is 10-30 μ m with hydrogen bond, filametntary length can be controlled, as paper making raw material, generally require between 2-20mm.The biological fiber cellulose fiber is under the effect of shearing force, and can divide silk to become minimum diameter is the inferior fubril silk of 1.78nm.Inferior fubril silk and aramid fiber short fibre weave in that the biological fiber cellulose fiber branches away, the projection in the aramid fiber short fiber have played the good action that the area that interweaves is increased substantially in the fiber interweaving process, guaranteed that the physical strength of page reaches requirement.The aramid fiber short fiber plays skeleton function in the fiber interweaving process, between fibrous skeleton, the biology cellulose fiber filled under such structure, just has a large amount of spaces therebetween in the page, and its tightness naturally just can not be too high, has reached the purpose of the low tightnessization of page.Owing to be filled with the biological fiber cellulose fiber between the aramid fiber short fiber, just can not have hole on the page simultaneously, the anti-burr property of page is also very good like this.
Among the present invention, the 20-65% (mass percent) that the aramid fiber short fiber accounts for the fiber total amount all can satisfy requirement of the present invention, and better scope is 35%-60% (mass percent), and best scope is 45-55% (mass percent).The biological fiber cellulose fiber accounts for the 35%-80% (mass percent) of fiber total amount, and better scope is 40%-65% (mass percent), and best scope is 45%-55% (mass percent).
Can make many paper according to the invention with above-mentioned raw material and proportioning:
Embodiment 1: the aramid fiber short fiber accounts for 20% of fiber total amount, and the biological fiber cellulose fiber accounts for 80% of fiber total amount.With the beater making beating, fiber is fully mixed.
Abundant mixed fiber is copied paper with cylinder mould machine, is oven dry about 106 ℃ at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.310g/cm3, and tensile strength is 0.83kN/m, and suction head vertically is 45mm/10min, laterally is 30mm/10min, and loss ratio is 0.599, and breakdown voltage is 628V, short circuit rate 0.05%.
Embodiment 2: the aramid fiber short fiber accounts for 45% of fiber total amount, and the biological fiber cellulose fiber accounts for 55% of fiber total amount, with the beater making beating, fiber is fully mixed.
Abundant mixed fiber is copied paper with cylinder mould machine, is oven dry about 106 ℃ at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.312g/cm3, and tensile strength is 0.82kN/m, and suction head vertically is 45mm/10min, laterally is 30mm/10min, and loss ratio is 0.601, and breakdown voltage is 625V, short circuit rate 0.05%.
Embodiment 3: the aramid fiber short fiber accounts for 65% of fiber total amount, and the biological fiber cellulose fiber accounts for 30% of fiber total amount, and abaca is 5%.With the beater making beating, fiber is fully mixed.
Using cylinder mould machine to copy paper then, is 106 ℃ of oven dry down at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.303g/cm3, and tensile strength is 0.78kN/m, and suction head vertically is 41mm/10min, laterally is 28mm/10min, and loss ratio is 0.578, and breakdown voltage is 653V, short circuit rate 0.04%.
Embodiment 4: the aramid fiber short fiber accounts for 45% of fiber total amount, and the biological fiber cellulose fiber accounts for 45% of fiber total amount, and abaca is 10%.With the beater making beating, fiber is fully mixed.
Using cylinder mould machine to copy paper then, is 106 ℃ of oven dry down at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.308g/cm3, and tensile strength is 0.92kN/m, and suction head vertically is 51mm/10min, laterally is 36mm/10min, and loss ratio is 0.453, and breakdown voltage is 678V, short circuit rate 0.04%.
Embodiment 5:
The aramid fiber short fiber accounts for 55% of fiber total amount, and the biological fiber cellulose fiber accounts for 50% of fiber total amount, and abaca is 5%.With the beater making beating, fiber is fully mixed.
Using cylinder mould machine to copy paper then, is 106 ℃ of oven dry down at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.306g/cm3, and tensile strength is 0.88kN/m, and suction head vertically is 48mm/10min, laterally is 32mm/10min, and loss ratio is 0.481, and breakdown voltage is 658V, short circuit rate 0.04%.
Embodiments of the invention can also have multiple combination, and its preparation method and the foregoing description are basic identical, for sake of convenience,
The embodiment summary is listed as follows:
| Numbering | Fibrous | Tightness g/cm3 | Thickness um | Tensile strength (indulging) kN/m | Suction head mm/10min | Breakdown voltage V | Short circuit ratio % | Loss ratio | |||
| The aramid fiber short fiber | The biological fiber cellulose fiber | Abaca | Vertically | Laterally | |||||||
| ??1 | ????20％ | ????80％ | ?0.310 | ??40 | ????0.83 | ????45 | ????30 | ????628 | ??0.05 | ??0.599 | |
| ??2 | ????20％ | ????75％ | ??5％ | ?0.312 | ??40 | ????0.82 | ????45 | ????30 | ????625 | ??0.05 | ??0.601 |
| ??3 | ????25％ | ????70％ | ??5％ | ?0.311 | ??40 | ????0.84 | ????46 | ????30 | ????628 | ??0.05 | ??0.597 |
| ??4 | ????30％ | ????60％ | ??10％ | ?0.312 | ??40 | ????0.85 | ????46 | ????32 | ????634 | ??0.04 | ??0.548 |
| ??5 | ????35％ | ????65％ | ?0.311 | ??40 | ????0.86 | ????46 | ????33 | ????645 | ??0.04 | ??0.526 | |
| ??6 | ????35％ | ????60％ | ??5％ | ?0.309 | ??40 | ????0.88 | ????48 | ????35 | ????657 | ??0.04 | ??0.497 |
| ??7 | ????40％ | ????55％ | ??5％ | ?0.311 | ??40 | ????0.91 | ????50 | ????36 | ????664 | ??0.04 | ??0.504 |
| ??8 | ????45％ | ????55％ | ?0.311 | ??40 | ????0.92 | ????49 | ????35 | ????658 | ??0.04 | ??0.5 | |
| ??9 | ????45％ | ????45％ | ??10％ | ?0.308 | ??40 | ????0.92 | ????51 | ????36 | ????678 | ??0.04 | ??0.484 |
| ??10 | ????50％ | ????50％ | ?0.307 | ??40 | ????0.91 | ????50 | ????35 | ????670 | ??0.04 | ??0.46 | |
| ??11 | ????50％ | ????45％ | ??5％ | ?0.308 | ??40 | ????0.92 | ????49 | ????34 | ????670 | ??0.05 | ??0.467 |
| ??12 | ????55％ | ????45％ | ?0.308 | ??40 | ????0.92 | ????49 | ????35 | ????671 | ??0.04 | ??0.476 | |
| ??13 | ????55％ | ????40％ | ??5％ | ?0.307 | ??40 | ????0.9 | ????48 | ????34 | ????668 | ??0.04 | ??0.492 |
| ??14 | ????55％ | ????35％ | ??10％ | ?0.307 | ??40 | ????0.89 | ????46 | ????33 | ????664 | ??0.05 | ??0.501 |
| ??15 | ????60％ | ????35％ | ??5％ | ?0.305 | ??40 | ????0.83 | ????45 | ????30 | ????662 | ??0.04 | ??0.534 |
| ??16 | ????65％ | ????35％ | ?0.305 | ??40 | ????0.81 | ????44 | ????30 | ????658 | ??0.04 | ??0.543 | |
| ??17 | ????65％ | ????30％ | ??5％ | ?0.303 | ??40 | ????0.78 | ????41 | ????28 | ????653 | ??0.04 | ??0.578 |
For the paper performance that the embodiment of the invention is described is better than general electrolytic paper, exemplifies two reference examples below and compare:
Reference example 1: full manila pulp makes its degree of beating reach 400SR with deflaker or beater making beating.Using cylinder mould machine to copy paper then, is 106 ℃ of oven dry down at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.61g/cm3, and tensile strength is 1.30kN/m.The electrolytic capacitor paper that the full manila pulp of this employing is made, suction head vertically are 13mm/10min, laterally are 10mm/10min, and loss ratio is 2.01, and breakdown voltage is 560V, and the short circuit rate is low.
Reference example 2: full manila pulp makes its degree of beating reach 230SR with deflaker or beater making beating.Using cylinder mould machine to copy paper then, is 106 ℃ of oven dry down at dryer temperature, batches and obtains electrolytic paper.After measured, the thickness of this paper is 40 μ m, tightness 0.35g/cm3, and tensile strength is 0.42kN/m.The electrolytic capacitor paper that the full manila pulp of this employing is made, suction head vertically are 25mm/10min, laterally are 20mm/10min, and loss ratio is 1.00, and breakdown voltage is 321V, short circuit rate 0.12%.
The performance data of above-mentioned two reference examples is starkly lower than the performance of embodiment of the invention paper.
The electrolytic capacitor paper that the pulp preparation of above-mentioned reference example and various embodiments of the present invention is come out, its performance are all by following method test:
1, the degree of beating (OSR) and weight in wet base
Press GB3332-1982.The method of being put down in writing is implemented test.
2, quantitative
Implement test by the method that GB/T451.2-2002 put down in writing.
3, thickness
Implement test by the method that GB/T451.3-2002 put down in writing.
4, tensile strength
Implement test by the method that GB/T453-2002 put down in writing.
5, suction head
The method that GB/T461.1-2002 put down in writing is implemented test.
6, loss ratio
The thickness of copying with full abaca material is 40 μ m, and tightness is 0.35g/cm
3The time the loss (the ESR value is also referred to as tg δ value) of electrolytic paper (paper in the reference example 2) be standard, obtain the ratio of various model electrolytic papers and its loss value.
With electrolytic paper be immersed in the ethylene glycol electrolyte that is dissolved with the ethanedioic acid ammonium (resistivity be 100 ohm/cm) in, use platinum electrode (5cm2) to clamp electrolytic paper again, press the 200g weight above, under 20 ± 1 ℃, AC10V, 100KHz condition, use ohmmeter, measure this interelectrode resistance, with the loss of expression paper in capacitor.
7, breakdown voltage.In order to expression paper withstand voltage in capacitor
Measure with method shown in the GB/T12656-1990.To be clipped between the brass electrode of φ 25mm through the pattern of oven dry, lead to the into electric current of 50Hz, in the time of 10-20s, boost continuously, breakdown until pattern, note voltage value at this moment.In order to expression paper withstand voltage in capacitor.
Claims (5)
1, a kind of low tightness electrolytic capacitor paper, it is characterized in that: it comprises at least two kinds of fibers, a kind of is aramid fibre, another kind is the biological fiber cellulose fiber, aramid fibre accounts for the 20%-65% (mass percent) of paper fiber total amount as the skeleton of paper, and the biological fiber cellulose fiber riddles between the aramid fibre, account for the 35%-80% (mass percent) of paper fiber total amount, all the other can add other fiber that does not damage electric property.
2, a kind of low tightness electrolytic capacitor paper according to claim 1, it is characterized in that: aramid fibre accounts for the 35%-60% (mass percent) of paper fiber total amount, the biological fiber cellulose fiber accounts for the 40%-65% (mass percent) of paper fiber total amount, and all the other can add other fiber that does not damage electric property.
3, a kind of low tightness electrolytic capacitor paper according to claim 1, it is characterized in that:, aramid fibre accounts for the 45%-55% (mass percent) of paper fiber total amount, the biological fiber cellulose fiber accounts for the 45%-55% (mass percent) of paper fiber total amount, and all the other can add other fiber that does not damage electric property.
4, according to claim 1 or 2 or 3 described a kind of low tightness electrolytic capacitor paper, it is characterized in that: aramid fiber has at least two annular protrusions that stretch out from the staple fibre circumferential surface, projection separates each other, and the mean ratio of the maximum gauge R of annular protrusion and aramid fiber short fibre ringless-type bossing minimum diameter r should be greater than 1.1; The fiber number of aramid fibre is the 1--4 dawn.
5, according to claim 1 or 2 or 3 described a kind of low tightness electrolytic capacitor paper, it is characterized in that: the biological fiber cellulose fiber is produced by acetobacter xylinum, and it is 10-30 μ m, the filament of length between 2-20mm that the oozy inferior fubril of acetobacter xylinum is connected to form diameter with hydrogen bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100247161A CN100373002C (en) | 2004-05-27 | 2004-05-27 | Low closeness paper for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100247161A CN100373002C (en) | 2004-05-27 | 2004-05-27 | Low closeness paper for electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1704529A true CN1704529A (en) | 2005-12-07 |
| CN100373002C CN100373002C (en) | 2008-03-05 |
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ID=35576531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100247161A Expired - Fee Related CN100373002C (en) | 2004-05-27 | 2004-05-27 | Low closeness paper for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100373002C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978322A (en) * | 2018-09-11 | 2018-12-11 | 浙江凯恩特种材料股份有限公司 | One kind is enhanced to exempt from the solid electrolytic capacitor paper and preparation method thereof that is carbonized |
| CN109755024A (en) * | 2019-01-28 | 2019-05-14 | 江苏法拉电子有限公司 | A kind of aluminium electrolutic capacitor of high charge storage capacity |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58147956A (en) * | 1982-02-26 | 1983-09-02 | Kanai Hiroyuki | Separator for alkaline battery |
| EP0994215B1 (en) * | 1998-10-15 | 2003-06-04 | Teijin Limited | Wholly aromatic polyamide fiber synthetic paper sheet |
| JP4162455B2 (en) * | 2002-09-11 | 2008-10-08 | 株式会社クラレ | Alkaline battery separator and battery using the same |
-
2004
- 2004-05-27 CN CNB2004100247161A patent/CN100373002C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978322A (en) * | 2018-09-11 | 2018-12-11 | 浙江凯恩特种材料股份有限公司 | One kind is enhanced to exempt from the solid electrolytic capacitor paper and preparation method thereof that is carbonized |
| CN109755024A (en) * | 2019-01-28 | 2019-05-14 | 江苏法拉电子有限公司 | A kind of aluminium electrolutic capacitor of high charge storage capacity |
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| Publication number | Publication date |
|---|---|
| CN100373002C (en) | 2008-03-05 |
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