# US 5,350,617 A · Water shieldable material and cable using the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,350,617 A
- Document ID: US5350617A
- Status: Granted
- Kind: A
- Application number: 07/955,871
- Filed: 1992-12-07
- Granted: 1994-09-27
- Earliest claimed: 1992-12-07
- Inventors: Noriaki Fujisawa; Yasuro Sakai; Tsuneo Kuwabara; Shigezou Kukita
- Web page: https://patentgrep.com/patent/US5350617A

## CPC

- H01R 4/70: Insulation of connections (end caps H01R4/22)
- B05D 5/00: Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B29C 70/58: comprising fillers only {, e.g. particles, powder, beads, flakes, spheres (B29C70/025 takes precedence, agglomerating hollow spheres to produce synthetic foam B29C70/66; compounding ingredients per se C08K)}
- D06N 3/0061: {Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds}
- G02B 6/44384: {the means comprising water blocking or hydrophobic materials (G02B6/4439, G02B6/4479 take precedence)}
- H01B 3/44: vinyl resins; acrylic resins (silicones H01B3/46)
- H01B 7/2825: {using a water impermeable sheath}
- H01B 7/288: using hygroscopic material or material swelling in the presence of liquid
- Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y10T 428/24372: Particulate matter
- Y10T 428/24405: Polymer or resin [e.g., natural or synthetic rubber, etc.]
- Y10T 428/249921: Web or sheet containing structurally defined element or component
- Y10T 428/26: Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T 428/27: Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
- Y10T 428/2962: Silane, silicone or siloxane in coating
- Y10T 442/2221: Coating or impregnation is specified as water proof
- Y10T 442/2369: Coating or impregnation improves elasticity, bendability, resiliency, flexibility, or shape retention of the fabric
- Y10T 442/2484: Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- D06N: WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A water shieldable material comprising a coating layer (2) having a specific density and comprising a specific rubber binder having non-watersolubility and flexibility and a high water absorption polymer particle (4) having a specific diameter and a solid substrate (3) supporting the coating layer, and at least satisfying the following conditions. 1. The density of the coating layer is between 0.65 g/cm.sup.3 and 1.00 g/cm.sup.3. 2. The weight ratio of the high water absorption polymer particle and the rubber group binder in the main portion, i.e., 90% or more by weight of the coating layer, is between 50% by weight and 90% by weight for the high water absorption polymer particle and between 10% by weight and 50% by weight. 3. The diameter of the particles belonging to the weight ratio of between 55% by weight and 95% by weight in the high water absorption polymer particle is between 45 .mu.m and 425 .mu.m.

## Claims

### Claim 1

A water shieldable material comprising a solid substrate and a coating layer arranged on the solid substrate and comprising a high water absorption polymer particle having a water absorption magnification of ten times or more and a rubber group binder, characterized in that
(a) the density of the coating layer is between 0.65 g/cm.sup.3 and 1.00 g/cm.sup.3,
(b) the ratio of the total weight of the high water absorption polymer particle and the rubber group binder in the coating layer is 90% by weight or more,
(c) the weight of the high water absorption polymer particle and the rubber group binder being the total weight of polymer and binder so that the weight of the high water absorption polymer particle is between 50% by weight and 90% by weight of the total weight of polymer and binder and the weight ratio of the rubber group binder is between 10% by weight and 50% by weight of the total weight of polymer and binder, and
(d) 55% to 95% by weight of the high water absorption polymer particles have a diameter of 45 .mu.m to 425 .mu.m.
(e) the dropping away ratio of said high water absorption polymer particle from said water shieldable material based on the total quantity of the high water absorption polymer is 50% weight:
wherein the dropping away ratio is measured after the water shieldable material is immersed in water for 10 minutes.

### Claim 2 (depends on 1)

A water shieldable material according to claim 1, characterized in that the weight ratio of the particle having a diameter of under 45 .mu.m in the high water absorption polymer particle is between 5% by weight and 45% by weight.

### Claim 3 (depends on 1)

A water shieldable material according to claim 1, characterized in that the high water absorption polymer is a polymer selected from a group of polyacrylonitrile graftpolymer hydrolyzate, sodium polyacrylic acid, methyl methacrylic acid.vinyl acetate copolymer hydrolyzate, polyvinyl alcohol hydrolyzate, polyacrylonitrile closslinked polymer hydrolyzate, polyethylene oxide crosslinkedpolymer, polyacrylamide closslinked polymer, acrylamide.acrylic acid crosslinked copolymer, sufoalkyl(meta)acrylate.acrylic acid crosslinked polymer, and isobutylene.maleic anhydride crosslinked polymer.

### Claim 4 (depends on 1)

A water shieldable material according to claim 1, characterized in that the high water absorption polymer is a polymer obtained by applying a putrefaction proofing treatment to a polymer selected from a group of starch.polyacrylonitrile graft polymer hydrolyzate, starch.acrylic acid graftcopolymer, carboxymethyl cellulose hydrolyzate, and cellulose.polyacrylonitrile graft polymer hydrolyzate.

### Claim 5 (depends on 1)

A water shieldable material according to claim 1, characterized in that the rubber group binder is a binder that can be solved by an organic solvent, can easily drop away the high water absorption polymer particle from the water shieldable material when the water shieldable material is in contact with water, imparts flexibility to the water shieldable material, and does not generate hydrogen gas by putrefaction thereof.

### Claim 6 (depends on 1)

A water shieldable material according to claim 1 characterized in that a hydrophilic agent is included in the rubber group binder.

### Claim 7 (depends on 1)

A water shieldable material according to claim 1, characterized in that the coating layer is compressed by a calendering treatment.

### Claim 8 (depends on 1)

A water shieldable material according to claim 1, characterized in that the solid substrate is a spun bond nonwoven fabric.

### Claim 9 (depends on 1)

A water shieldable material according to claim 1, characterized in that a nonwoven fabric is further arranged on a surface of the coating layer, and a number of voids are formed between fibers constituting the nonwoven fabric and a number of voids having a sum of lengths of sides of the voids of 0.3 mm or more, when the shape of the void is assumed to be a polygon, being 50% or more in all of the voids formed in the nonwoven fabric.