 Zoom lens system for minimal lens system length and minimal aberrations |
| An object of the present invention is to provide a zoom lens system of a positive front group and ... |
|
| Zoom lens |
| It is therefore an object of the present invention to solve all the above-noted problems and to ... |
|
| Zoom lens system |
| A primary object of the present invention is to provide a compact zoom lens system which is ... |
|
| Wide-angle zoom lens |
| Accordingly, it is a primary object of the present invention, which obviates the defects inherent ... |
|
| Inner focusing zoom lens system |
| In light of the above, the object of the present invention is to provide a compact zoom lens system ... |
|
| Zoom lens system |
| It is the primary object of the present invention to overcome the foregoing deficiencies in the ... |
|
| Optical apparatus for superimposing displayed visual information |
| According to the present invention, there is provided optical apparatus for use for example in an ... |
|
| Visual display apparatus |
| In view of the above-described problems of the prior art, an object of the present invention is to ... |
|
| DC bus voltage regulation by controlling the frequency in a variable frequency inverter |
| The invention solves the problem of DC bus voltage overshoot under conditions of an overhauling ... |
|
| Pulsed battery rejuvenator having variable trailing edge shaped pulses |
| The present invention comprises a modification of the pulse generating, battery rejuvenating ... |
|
|
Alkaline battery separator and process for producing the same
| Details |
Inventors: Tanaka, Masanao; Kimura, Koji; Tokutake, Nobutoshi;
Assignee: Japan Vilene Company, Ltd. (Tokyo, JP)
Primary Examiner: Kalafut; Stephen
Assistant Examiner: Crepeau; Jonathan
Attorney, Agent or Firm: Burgess, Ryan & Wayne, Wayne; Milton J., Moran; William R.
An alkaline battery separator comprising a hydrophilic nonwoven fabric obtainable by heat-fusing and hydro-entangling (1) polyolefin dividable composite fibers having an average fiber length of 20 to 60 mm, (2) high-strength fibers having an average fiber length of 30 to 60 mm and a fiber strength of 5 g/denier or more, and (3) polyolefin heat-sensitive-adhesive fibers having an average fiber length of 30 to 60 mm, to obtain a heat-fused and hydro-entangled nonwoven fabric by a dry-laid method, and imparting a hydrophilic property to the resulting heat-fused and hydro-entangled nonwoven fabric; these high-strength fibers accounting for 20 to 45 mass % with respect to a total mass of the polyolefin dividable composite fibers, the high-strength fibers and the polyolefin heat-sensitive-adhesive fibers. The alkaline battery separator exhibits an excellent breaking strength, and has practical and sufficient tensile strength and electrolyte-holding capacity properties. |
|
DETAILED DESCRIPTION What is claimed is: 1.
An alkaline battery separator comprising a hydrophilic nonwoven fabric obtainable by substantially uniformly admixing (1) polyolefin dividable composite fibers having an average fiber length of 20 to 60 mm, said polyolefin dividable composite fibers being a combination of high-density polyethylene and polypropylene, (2) high-strength fibers having an average fiber length of 30 to 60 mm and a fiber strength of at least 7 g/denier, said high-strength fibers being polypropylene and/or ultra-high-strength polyethylene, and (3) polyolefin heat-sensitive-adhesive fibers having an average fiber length of 30 to 60 mm, said polyolefin heat-sensitive-adhesive fibers being composed of a core component of polypropylene and a sheath component of low-density polyethylene, to form a fiber web by a dry-laid method, subjecting the resulting fiber web to a heat-fusing treatment and a hydro-entangling treatment to obtain a heat-fused and hydro-entangled nonwoven fabric, and imparting a hydrophilic property to the resulting heat-fused and hydro-entangled nonwoven fabric; said high-strength fibers accounting for 25 to 40 mass % with respect to a total mass of said polyolefin dividable composite fibers, said high-strength fibers and said polyolefin heat-sensitive-adhesive fibers.
2.
The alkaline battery separator according to claim 1, wherein an average fiber diameter of fine fibers divided from said polyolefin dividable composite fiber is 1 to 10 .
mu.
m.
3.
The alkaline battery separator according to claim 1, wherein said polyolefin dividable composite fibers account for 30 to 60 mass % with respect to a total mass of said polyolefin dividable composite fibers, said high-strength fibers and said polyolefin heat-sensitive-adhesive fibers.
4.
The alkaline battery separator according to claim 1, wherein said high-strength fiber is polypropylene or ultra high-strength polyethylene fiber.
5.
The alkaline battery separator according to claim 1, wherein said ultra-high-strength polyethylene fiber has a fiber strength of 25 g/denier or more
|
| Related patents |
|
|
Isostatic compression method for producing solid state electrochemical cells
What is claimed is: 1. A method for manufacturing solid state electrochemical cells comprising isostatically compressing at least one cell preassembly which preassembly ...
|
|
|
Method for mixing LiPF.sub.6 electrolytes at elevated temperatures
OF THE INVENTION As noted above, this invention is directed to a method for mixing LiPF.sub.6 salt into an electrolyte solution suitable for forming a solid electrolyte ...
|
|
|
Method of making lithium-ion cell having deactivated carbon anodes
The problem with the anode-loaded cells and the first and second problems with the cathode-loaded cells are believed to be attributed at least in part to the presence of ...
|
|
|
Manganese oxide electrode and method
OF THE INVENTION The invention will better be understood when considered in the light of the following description of certain specific embodiments thereof which is ...
|
|
|
Methods of fabricating electrochemical cells
The present invention is based, in part, on the discovery that conditioning secondary lithium ion cells at elevated temperatures reduces the time required to complete ...
|
|
|
Oxidation dyeing compositions containing a cationic coupling agent, novel cationic coupling agents
What is claimed is: 1. A composition for oxidation dyeing of keratin fibres comprising, in a medium suitable for dyeing, at least one coupler chosen from monobenzenic ...
|
|
|
D.C. power source with temperature compensation
A main purpose of the present invention is, therefore, to provide a D.C. power source having a temperature compensation circuit in which variation in the voltage drop ...
|
|
|
Television receiver
Accordingly, it is an object of this invention to provide a television receiver with a rotatable cathode ray tube which overcomes the previously mentioned problems. More ...
|
|
|
Ultrawide angle zoom objective
The present invention is concerned with a two-component zoom objective, and aims to provide an ultrawide angle zoom objective with the front lens members of reduced ...
|
|
|
Zoom lens system of relatively high zoom ratio ranging to wide angle photography
An object of the present invention is to provide a zoom lens system with a relatively high zoom ratio ranging to a wide field angle while maintaining a compact size. A...
|
|
|
Electrical and Wave 
