EP0258002A2
Expired / Lapsed
EP
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Waterproof article and method of making a waterproof article
Assignee: Scimat Ltd
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Filing: 1987-08-21
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Granted: —
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Expires: 2007-08-21
Abstract
Abstract An article which is rendered waterproof by a microporous membrane of a hydrophobic material, the pores of the membrane in a layer-like region on or towards a surface thereof being plugged with a hydrophilic material, leaving hydrophobic material exposed on the said surface between the pores.
Inventors
- 👤 John Anthony Cook
- 👤 Raymond William Singleton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/003; B01D67/0081; B01D67/0088; B32; B32B; B32B3/00; B32B3/26; B32B38/00; B32B38/10; B32B5/00; B32B5/18; C; C08; C08J; C08J9/00; C08J9/26; C08J9/36; C08J9/40; C08J9/42; D; D06; D06N; D06N3/00; D06N3/0043; D06N7/00; B01D2325/00; B01D2325/38; B32B2038/0052; B32B2038/0076; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2307/73; B32B2310/00; B32B2310/08; B32B2310/0806; B32B2310/0831; C08J2471/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/24998; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3878; Y10T442/3886
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
An article which is rendered waterproof by a microporous membrane of a hydrophobic material, the pores of the membrane in a layer-like region on or towards a surface thereof being plugged with a hydrophilic material, leaving hydrophobic material exposed on the said surface between the pores.
Claim 2
Dependent Claim
46 words
An article which is rendered waterproof by a microporous membrane of a hydrophobic material, the pores of the membrane in a layer-like region on or towards a surface thereof being plugged with a hydrophilic material, leaving hydrophobic material exposed on the said surface between the pores.
Claim 3
Dependent Claim
16 words
An article as claimed in claim l, in which the membrane is laminated with a fabric.
Claim 4
Dependent Claim
24 words
An article as claimed in claim 2, in which the plugged layer-like region of the membrane is on the surface remote from the fabric.
Claim 5
Independent Claim
56 words
A method of making a waterproof article which comprises: (a) plugging the pores in a layer-like region on or towards a first surface of a microporous membrane of hydrophobic material, so that hydrophobic material is left exposed on the first surface between the pores; and (b) laminating the membrane with an article to be rendered waterproof.
Claim 6
Independent Claim
56 words
A method of making a waterproof article which comprises: (a) plugging the pores in a layer-like region on or towards a first surface of a microporous membrane of hydrophobic material, so that hydrophobic material is left exposed on the first surface between the pores; and (b) laminating the membrane with an article to be rendered waterproof.
Claim 7
Dependent Claim
17 words
A method as claimed in claim 4, in which step (b) is carried out before step (a).
Claim 8
Dependent Claim
51 words
A method as claimed in claim 4 or claim 5, in which the plugged pores are formed in the layer-like region on the first surface of the membrane by selectively removing hydrophilic material from the opposite surface of a membrane which comprises microporous hydrophobic material with hydrophilic material within the pores.
Claim 9
Independent Claim
45 words
A method as claimed in any one of claims 4 to 6, which includes the step of modifying the hydrophilic material so that its susceptibility to the removal treatment is less in the layer-like region of the membrane than in the remainder of the membrane.
Claim 10
Dependent Claim
24 words
A method as claimed in claim 7, in which the modification step comprises crosslinking the hydrophilic material in the layer-like region of the membrane.
Claim 11
Dependent Claim
36 words
A method as claimed in claim 8, in which the modification step comprises treating the hydrophilic material in the layer-like region of the membrane with a composition which renders the hydrophilic material in that region crosslinkable.
Claim 12
Dependent Claim
19 words
l0. A method as claimed in claim 9, in which the composition comprises a photosensitiser and a crosslinking agent.
Claim 13
Independent Claim
15 words
A method as claimed in claim l0, which includes exposing the membrane to ultraviolet radiation.
Claim 14
Independent Claim
45 words
A method as claimed in any one of claims 6 to l2, in which the hydrophilic material is removed from the said opposite surface of the membrane by treatment with a solvent in which the hydrophilic material at that surface of the membrane is soluble.
References Cited (Backward Citations)
No citation records indexed.
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