Coated microfibrous web and method for producing the same
AssigneeMavig GmbH
InventorsThomas Leucht, Gaby Streit
Life of this patent
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Abstract
A coated microfibrous web, a method for producing the same, the use thereof as a covering of a radiation protection material, and a radiation protection device are described. The coated microfibrous web contains: (i) a microfibrous web containing one or more polyesters and/or one or more polyamides and/or one or more polyamide-polyester copolymers and having an impregnation composition containing (a) an aromatic dicarboxylic acid, the dicarboxylic groups of which are each esterified with a diol, and/or (b) one or more oligomers, each containing 2 to 10 repeat units consisting of a monoester of an aromatic dicarboxylic acid impregnated with a diol; and (ii) a layer comprising polyurethane which is present only on one side of the microfibrous web.
Claims10
A coated microfibrous web comprising:
- (i) a microfibrous web comprising one or more polyesters and/or one or more polyamides and/or one or more polyamide-polyester copolymers and impregnated with an impregnating composition comprising
- (a) an aromatic dicarboxylic acid, the carboxylic acid groups of which are each esterified with a diol, and/or
- (b) one or more oligomers, each containing 2 to 10 repeating units consisting of a monoester of an aromatic dicarboxylic acid with a diol;
- and
- (ii) a layer comprising polyurethane which is present on only one side of the microfibrous web.
A process for producing a coated microfibrous web, comprising the following steps of:
- (a) providing a microfibrous web comprising one or more polyesters and/or one or more polyamides and/or one or more polyamide-polyester copolymers;
- (b) impregnating the microfibrous web with an impregnating formulation comprising an aromatic dicarboxylic acid, the carboxylic acid groups of which are each esterified with a diol, or with an impregnating formulation comprising:
- (I) water,
- (II) (a) an aromatic dicarboxylic acid, the carboxylic acid groups of which are each esterified with a diol, and/or
- (b) one or more oligomers, each containing 2 to 10 repeating units consisting of a monoester of an aromatic dicarboxylic acid with a diol,
- (III) one or more silicones, and
- (IV) one or more waxes;
- (c) drying the impregnated microfibrous web;
- (d) applying a coating composition comprising polyurethane on only one side of the dried impregnated microfibrous web;
- and
- (e) optionally, thermally treating the coated microfibrous web obtained in step (d).
A radiation protection device comprising:
- (α) a radiation protection material;
- and
- (β) a coated microfibrous web comprising:
- (i) a microfibrous web comprising one or more polyesters and/or one or more polyamides and/or one or more polyamide-polyester copolymers and impregnated with an impregnating composition comprising
- (a) an aromatic dicarboxylic acid, the carboxylic acid groups of which are each esterified with a diol, and/or
- (b) one or more oligomers, each containing 2 to 10 repeating units consisting of a monoester of an aromatic dicarboxylic acid with a diol;
- and
- (ii) a layer comprising polyurethane which is present on only one side of the microfibrous web;
- wherein the coated microfibrous web is applied on at least one side of the radiation protection material and wherein the side coated with polyurethane is adjacent to the radiation protection material.
Dependencies are inferred from the claim text.