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Binder fiber and separator for alkaline cell using same

A technology for bonding fibers and battery separators, applied in the field of bonding fibers, it can solve the problems of thermal degradation resistance and oxidation degradation resistance cannot be achieved at the same time, and achieve excellent high-rate discharge characteristics, excellent leakage resistance, and high oxidation resistance. Effects of deterioration and electrolyte resistance

Inactive Publication Date: 2007-10-31
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional binder fibers, the above-mentioned adhesive strength such as the temporary adhesive force and the above-mentioned heat deterioration resistance (hereinafter may be simply referred to as "heat resistance") or oxidation deterioration resistance (hereinafter may be simply referred to as "oxidation resistance") ) cannot be achieved simultaneously

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0204] 60 parts of polyamide fiber A1 and 40 parts of binder fiber B1-B6 were mixed together, dissociated in water with a pulper, and a uniform papermaking pulp was prepared in a closed container (chest) under slow stirring. The papermaking pulp was passed through an inclined short-wire papermaking machine to make paper by a wet papermaking method, and then dried in a Yankee dryer at 140°C to prepare a wet-laid nonwoven fabric. Then the hot calendering treatment was carried out at a roll temperature of 200℃, and finally the two sides of the non-woven fabric were discharged with a discharge capacity of 2600 (W·min / m 2 ) Perform corona treatment to obtain an alkaline battery separator.

Embodiment 7

[0206] Mix in the ratio of 70 parts of polyamide fiber A3 and 30 parts of binder fiber B7, use a roller carding machine to make a net, and then use a water stream of 5 MPa for entanglement treatment. Then, as in Example 1, the hot calendering treatment was performed at a roll temperature of 200°C, and finally the discharge amount of 2600 (W·min / m 2 ) Perform corona treatment to obtain an alkaline battery separator.

Embodiment 8

[0214] 57.5 parts of polyamide fiber A1, 40 parts of binder fiber B5, and 2.5 parts of polyparaphenylene benzobisoxazole fiber (manufactured by Toyobo Co., Ltd., Zylon, tensile strength 37cN / dtex, fineness 1.7dtex, Fiber length 6mm) are mixed together, dissociated in water with a pulper, and uniform papermaking pulp is prepared in a closed container under slow stirring. Except that this papermaking pulp was used, it was completely the same as that of Example 1, and an alkaline battery separator was obtained.

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Abstract

Disclosed is a binder fiber wherein at least a part of the fiber surface is composed of a polyamide component which contains a semi-aromatic polyamide having at least an aromatic ring unit and a C3-7 alkane unit which may have a branched C1-3 alkyl chain. In this binder fiber, the polyamide component may be a semi-aromatic copolyamide (a) having an aromatic ring unit, a C3-7 alkane unit which may have a branched C1-3 alkyl chain and a C8-12 alkane unit which may have a branched C1-3 alkyl chain. The polyamide component may alternatively be a combination (d) of a semi-aromatic polyamide (b) having an aromatic ring unit and a C3-7 alkane unit which may have a branched C1-3 alkyl chain and a semi-aromatic polyamide (c) having an aromatic ring unit and a C8-12 alkane unit which may have a branched C1-3 alkyl chain.

Description

Technical field [0001] The present invention relates to binder fibers and battery separators using the fibers. Specifically, the present invention relates to alkaline manganese dry batteries, silver batteries, air batteries, nickel-cadmium batteries, nickel-hydrogen batteries, silver oxide-zinc batteries, nickel- Alkaline battery separators such as zinc storage batteries and nickel-iron storage batteries (especially alkaline secondary battery separators used in high-rate discharge) and binder fibers suitable for use therein. Background technique [0002] Alkaline secondary batteries such as nickel-cadmium storage batteries and nickel-hydrogen storage batteries have excellent high-rate discharge characteristics, and therefore are widely used as power sources for power tools of cordless electric tools. The separator suitable for use in the above-mentioned battery usually has the shape of paper or non-woven fabric, and the fibers constituting the paper or non-woven fabric include va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/80D01F6/90D01F8/12D21H13/26D21H15/10H01M2/16D04H1/4334D04H1/549H01M50/403H01M50/423H01M50/494
CPCH01M10/30D21H15/10D01F6/905H01M10/24D21H13/26H01M2/162H01M10/345D01F8/12D01F6/805H01M2/145Y10T428/29Y10T442/641Y02E60/10H01M50/44H01M50/403H01M50/494H01M50/423D10B2505/00
Inventor 片山隆内田光一大前好信
Owner KURARAY CO LTD