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1. 发明专利

JP2002141044A ALKALINE BATTERY SEPARATOR 失效
公开(公告)号：JP2002141044A
公开(公告)日：2002-05-17
申请号：JP2000334875
申请日：2000-11-01
申请人： TOYO BOSEKI
发明人： TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO , YAMASHITA MASAHIRO , HIDAKA HIDEJI
IPC分类号： H01M2/16
摘要： PROBLEM TO BE SOLVED: To enable improving strength by sulfonation treatment by identifying the olefine system resin composition capable of performing high temperature treatment and by implementing a pressurization in a specific range of pressure during heating in a high temperature liquid as represented by sulfuric acid. SOLUTION: By using a nonwoven fabric of polyolefine system resin having 20 wt.% or less of low density polyethylene content, and by making the liquid as represented by sulfuric acid high temperature of 120 deg.C or more, the nonwoven fabric is steeped in the above liquid and a pressing treatment of 0.05-50 kPa is implemented. By the above treatment, the effect of improvement of strength by sulfonation treatment compared with the raw fabric is seen and possibility of occurrence of short circuit is reduced, and the separator can be made thinner. In the high temperature sulfuric acid treatment, the quantity of acidic group that is not neutralized after steeping in the alkaline liquid is also improved, and the improvement of capacity retention can be achieved at the same time, and an alkaline battery separator having an excellent performance and reliability is provided.

2. 发明专利

JP2002304979A SEPARATOR FOR ALKALINE BATTERY AND METHOD FOR MANUFACTURING THE SAME 失效
公开(公告)号：JP2002304979A
公开(公告)日：2002-10-18
申请号：JP2001107270
申请日：2001-04-05
申请人： TOYO BOSEKI
发明人： YAMASHITA MASAHIRO , TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO
IPC分类号： D06M11/00 , D04H1/4291 , D06M11/55 , D06M14/08 , D06M15/263 , H01M2/16 , H01M2/18 , H01M10/30 , D04H1/42
摘要： PROBLEM TO BE SOLVED: To obtain a thin separator excellently passing an oxygen gas produced when overcharging an alkaline secondary battery, suppressing a pressure rise in the battery, and causing no short-circuiting in it. SOLUTION: After rugged parts are formed on the surface of a non-woven fabric of a thermoplastic resin, a polyorefine based resin in particular, in advance, hydrophilization treatment is applied to the non-woven fabric to obtain this separator for the alkaline battery. The separator for the alkaline battery is not short-circuited when assembling it in the battery, and the battery having this separator built-in has an excellent internal pressure suppressing effect.

3. 发明专利

JP2002141048A ALKALINE BATTERY SEPARATOR 失效
公开(公告)号：JP2002141048A
公开(公告)日：2002-05-17
申请号：JP2000334874
申请日：2000-11-01
申请人： TOYO BOSEKI
发明人： YAMASHITA MASAHIRO , TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO , HIDAKA HIDEJI
IPC分类号： H01M2/16 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To provide a method that prevents short-circuiting by sulfonating treatment by identifying the olefine system resin composition capable of performing high temperature treatment and implementing a pressurization in a specific range of pressure during heating in a high temperature liquid as represented by sulfuric acid. SOLUTION: By using a nonwoven fabric of polyolefine system resin having 20 wt.% or less of low density polyethylene content, and by making the liquid as represented by sulfuric acid high temperature of 120 deg.C or more, the nonwoven fabric is steeped in the above liquid and a pressing treatment of 0.05-50 kPa is implemented. By the above treatment, the effect of improvement in strength by sulfonating treatment compared with the raw fabric is seen and possibility of occurrence of short-circuiting is reduced, and the thinning of the separator becomes possible. In the high temperature sulfuric acid treatment, the quantity of acidic group that is not neutralized after steeping in the alkaline liquid is improved at the same time, and the improvement of capacity retention can be also achieved at the same time, and an alkaline battery separator having an excellent performance and reliability is provided.

4. 发明专利

JP2002063890A SEPARATOR FOR ALKALINE BATTERY AND THE ALKALINE BATTERY 失效
公开(公告)号：JP2002063890A
公开(公告)日：2002-02-28
申请号：JP2000248709
申请日：2000-08-18
申请人： TOYO BOSEKI
发明人： TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO , YAMASHITA MASAHIRO
IPC分类号： H01M2/16 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To aim at improvement of ammonia trap performance and improvement of strength, liquid suction and gas permeability. SOLUTION: The separator for the alkaline battery and the alkaline battery is provided, which contribute to improvement in productivity of a battery, safety and battery service life with reduced self-discharge, giving little risk of short- circuiting and proper permeability of oxygen gas through rapid absorption of electrolyte solution, by laminating a reinforcing layer, put under a hydrophilic treatment other than addition of sulfonic acid group of superior strength, liquid suction and gas permeability on a layer, including fabric obtained by sulfonization treatment of polyolefin system resin fabric with a limiting value for the viscosity of 0.2 to 1.0 dl/g.

5. 发明专利

JP2001291505A SEPARATOR FOR ALKALINE BATTERY AND ALKALINE BATTERY 失效
公开(公告)号：JP2001291505A
公开(公告)日：2001-10-19
申请号：JP2000106464
申请日：2000-04-07
申请人： TOYO BOSEKI
发明人： YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO , YAMASHITA MASAHIRO , TANAKA TOSHIO
IPC分类号： H01M2/16 , H01M10/28
摘要： PROBLEM TO BE SOLVED: To provide a separator in which an ammonia trap performance has been enhanced and an alkaline battery in which this separator is used and a self-discharge amount is reduced more, and which is superior in the capacity retention rate, compared with the fact that a strong sulfonation of general-purpose polyolefins induces a reduction of fiber strength and a sulfonated fiber surface is peel off and as a result the degree of sulfonation cannot be greatly elevated although ammonia trap performance improves if the degree of sulfonation is elevated. SOLUTION: This is a separator for the alkaline battery wherein a layer which has cellulosic chemical fiber as a reinforcing layer has been bonded to the layer containing the fiber which is obtained by a sulfonic treatment of polyolefinic resin fiber of limiting viscosity 0.2 to 1.00 dl/g.

6. 发明专利

JP2002324539A SEPARATOR FOR ALKALINE BATTERY 失效
公开(公告)号：JP2002324539A
公开(公告)日：2002-11-08
申请号：JP2001129694
申请日：2001-04-26
申请人： TOYO BOSEKI
发明人： YAMASHITA MASAHIRO , TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO
IPC分类号： H01M2/18 , H01M2/16 , H01M10/24
摘要： PROBLEM TO BE SOLVED: To obtain a separator which pass oxygen gas generated when overcharging an alkaline secondary battery and is hard to increase an internal pressure, has its long cycle life, is excellent in a discharging characteristic at high yield and is not short-circuited. SOLUTION: The separator for the alkaline battery prepared by forming a recess portion on one side and by forming a concave portion on the back side of the recess portion is hard to be short-circuited due to no weak strength portion, and the battery assembled opposing the recess portion existing in the separator for the alkaline battery to a negative electrode is hard to increase the internal pressure, has its long cycle life, is excellent in the discharging characteristic at a high rate.

7. 发明专利

JP2002289165A ALKALI BATTERY, SEPARATOR FOR IT, AND MANUFACTURING METHOD THEREOF 审中-公开
公开(公告)号：JP2002289165A
公开(公告)日：2002-10-04
申请号：JP2001253445
申请日：2001-08-23
申请人： TOYO BOSEKI
发明人： YAMASHITA MASAHIRO , TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO
IPC分类号： D06M11/00 , D04H1/498 , D06M11/55 , D06M17/00 , D06M101/20 , H01M2/16 , H01M10/30 , D04H1/46
摘要： PROBLEM TO BE SOLVED: To easily provide a separator wherein oxygen gas occurring at overcharge with an alkali secondary battery passes well, the internal pressure of battery is hard to rise, a cycle life is long, being of high rigidity though with less thickness, and a self-discharge suppressing function is provided, with good capacity retention. SOLUTION: The laminating-type an alkali battery separator satisfies all following conditions (1)-(4), to allow both lamination and sulfonation while strength of a nonwoven fabric is improved: (1) a nonwoven fabric comprising a specified polypropylene resin containing less low melting-point component is used; (2) the nonwoven fabric containing thin fiber and the nonwoven fabric containing thick fiber are sulfonated with a liquid sulfonating agent at a constant high temperature; (3) the non-woven fabric containing thick fiber and that containing thin fiber are pressurized at a high temperature; (4) two kinds of nonwoven fabrics in which a limit viscosity difference is within a constant range, with no difference, while a sufficient difference is provided for fiber thickness are laminated.

8. 发明专利

JP2002093400A SEPARATOR FOR ALKALINE BATTERY AND ALKALINE BATTERY 失效
公开(公告)号：JP2002093400A
公开(公告)日：2002-03-29
申请号：JP2000259752
申请日：2000-08-29
申请人： TOYO BOSEKI
发明人： YAMASHITA MASAHIRO , TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO
IPC分类号： D04H1/587 , H01M2/16 , H01M10/30 , D04H1/58
摘要： PROBLEM TO BE SOLVED: To provide a thin separator with improved battery yield rate in a polyolefin system separator used for an alkaline battery, especially an alkaline secondary battery. SOLUTION: The separator for an alkaline battery is characterized as having air permeability of not less than 4 cm3/cm2/s and not more than 16 cm3/cm2/s, and thickness of not more than 130 μm and pinning degree of elasticity of not less than 115 gf/mm, and further, consisting of a non-woven fabric layer or woven fabric layer satisfying the preceding formula 1. Here, the pinning degree of elasticity denotes an index indicating easiness of an electrode stylus to penetrate the separator, and the thinner the separator, the larger the value should be set to suppress short circuiting rate.

9. 发明专利

JP2001283818A SEPARATOR FOR ALKALINE BATTERY AND ALKALINE BATTERY 失效
公开(公告)号：JP2001283818A
公开(公告)日：2001-10-12
申请号：JP2000102529
申请日：2000-04-04
申请人： TOYO BOSEKI
发明人： TANAKA TOSHIO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO , YAMASHITA MASAHIRO
IPC分类号： H01M2/16 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To provide a separator for a battery which has an excellent ammonia capture property, and a high capacity retainability with little self-discharge, and a long life, through use of this separator. SOLUTION: This separator for the battery with robustness, excellent in self-discharge and ammonia capture property, and highly transmissive of oxygen gas reinforced with one or more layers of a sheet-type substance made of fibers with vinyl alcohol resin as a main component laminated with a sheet-like substance made of fiber with polyolefinic resin containing sulfonate group as a main component is provided.

10. 发明专利

JP2001283817A SEPARATOR FOR ALKALINE BATTERY 失效
公开(公告)号：JP2001283817A
公开(公告)日：2001-10-12
申请号：JP2000102528
申请日：2000-04-04
申请人： TOYO BOSEKI
发明人： YAMASHITA MASAHIRO , YAMAGUCHI HIROKI , TAKIMOTO NAOHIKO
IPC分类号： H01M2/16
摘要： PROBLEM TO BE SOLVED: To provide a separator which has an excellent affinity to an electrolyte in a case of polyolefinic separator used for an alkaline, especially, an alkaline secondary battery. SOLUTION: This separator for the alkaline battery is made of nonwoven fabric layer containing not less than 30 wt.% of fabric consisting of polyolefinic resin irregular cross section fiber with average fiber cross section of not less than 50 μm2 and not more than 2,000 μm2, laminated at least one or more layer and subjected to hydrophilic treatment.

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