EP0177364A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for preparation of water-proof sheets
Assignee: Hiraoka and Co Ltd
•
Filing: 1985-10-04
•
Granted: —
•
Expires: 2005-10-04
Abstract
Abstract Disclosed is a process for preparing a water-proof sheet by forming a polymer coating on both the surfaces of a fibrous substrate fabric. At first, the fibrous substrate fabric is treated with a water repellant, and both the surfaces are subjected to the low temperature plasma treatment or corona discharge treatment. Then, a polymer coating is formed on both the surfaces. According to this process, the peel strength of the polymer coating is improved and the water absorbing property is reduced substantially to zero. If an inorganic fiber substrate fabric is treated according to this process, the bending resistance is highly improved in the resulting water-proof sheet.
Inventors
- 👤 Tsutomu Obayashi
- 👤 Shinobu Watanabe
- 👤 Kazuhide Ino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
D; D06; D06N; D06N7/00; B; B29; B29C; B29C59/00; B29C59/14; B32; B32B; B32B38/00; B32B38/0008; D06M; D06M10/00; D06M10/02; D06M10/025; D06M10/04; D06M10/06; D06N3/00; D06N3/007; D06N3/0084; D06M2101/00; D06M2101/16; D06M2101/30; D06M2101/32; D06M2200/00; D06M2200/10; D06M2200/12; D10; D10B; D10B2505/00; D10B2505/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
A process for the preparation of water-proof sheets, which comprises forming a polymer coating on both the surfaces of a fibrous substrate fabric, wherein the fibrous substrate fabric is first treated with a water repellant, both the surfaces of the fabric are subjected to the low temperature plasma treatment or corona discharge treatment, and a polymer coating is then formed on both the surfaces of the fabric.
Claim 2
Dependent Claim
67 words
A process for the preparation of water-proof sheets, which comprises forming a polymer coating on both the surfaces of a fibrous substrate fabric, wherein the fibrous substrate fabric is first treated with a water repellant, both the surfaces of the fabric are subjected to the low temperature plasma treatment or corona discharge treatment, and a polymer coating is then formed on both the surfaces of the fabric.
Claim 3
Dependent Claim
31 words
A process according to claim 1, wherein the fibrous substrate fabric is composed of at least one member selected from natural fibers, inorganic fibers, regenerated fibers, semi-synthetic fibers and synthetic fibers.
Claim 4
Dependent Claim
43 words
A process according to claim 1 or claim 2, wherein the water repellant is selected from a wax, an aluminum soap, a zirconium salt, a quanternary ammonium salt, an N-methylol fatty acid amide, an amino resin derivative, a fluorine compound and a silicone.
Claim 5
Dependent Claim
31 words
A process according to any one of claims 1 to 3, wherein the water repellant treatment is carried out according to an impregnation method, a coating method or a spray method.
Claim 6
Dependent Claim
27 words
A process according to any one of claims 1 to 4, wherein the polymer is selected frcm a synthetic resin, a synthetic rubber and a natural rubber.
Claim 7
Dependent Claim
37 words
A process according to claim 5, wherein the polymer is synthetic resin is selected from polyvinyl chloride, polyurethane, an ethylene/vinyl acetate copolymer, isotactic polypropylene, polyethylene, polyacrylonitrile, a polyester, a polyamide, a fluorine resin and a silicone resin.
Claim 8
Dependent Claim
38 words
A process according to claim 5, wherein the polymer is synthetic rubber is selected from a styrene/butadiene rubber, a chlorosulfonated polyethylene rubber, a polyurethane rubber, a butyl rubber, an isopropylene rubber, a silicone rubber and a fluorine rubber.
Claim 9
Dependent Claim
31 words
A process according to any one of claims 1 to 7, wherein the polymer coating is formed by a calender method, an extrusion method, a coating method or a dipping method.
Claim 10
Dependent Claim
39 words
A process according to any one of claims 1 to 8, wherein the adhesiveness of the surface layer portion of the surface of the fibrous substrate fabric is improved by the low temperature plasma treatment or corona discharge treatment.
Claim 11
Dependent Claim
34 words
A process according to claim 9, wherein the low temperature plasma treatment is effected by a low temperature plasma of a gas having no plasma polymerizability under a pressure of 0.01 to 10 Torr.
Claim 12
Dependent Claim
38 words
ll. A process according to claim 9, wherein the gas having no plasma polymerizability is selected from helium, neon, argon, nitrogen, nitrogen suboxide, nitrogen dioxide, oxygen, air, carbon monoxide, carbon dioxide, hydrogen, chlorine, a halide and a sulfide.
Claim 13
Dependent Claim
22 words
A process according to claim 9, wherein the corona discharge treatment is carried out at an output of 4 to 800 KW.
Claim 14
Dependent Claim
22 words
A process according to claim 9, wherein the corona discharge treatment is carried out at an electrode spacing smaller than 30 mm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.