Waterproof and water vapour permeable lining
AssigneeAkzo Nobel N.V.
InventorDennis W Hannon
Life of this patent
Estimating the term…
Abstract
Proposed is a process for sealing the seams of a water vapour permeable lining comprising a laminate of a textile material and a waterproof, but water vapour permeable film in which sections of said laminate with the textile sides facing one another are bonded together along the contours of the material to be lined, after which the lining is dipped in a solution of a hydrophilic polymer in an organic solvent which acts as a swelling agent for the waterproof film of the laminate, followed by evaporation of the solvent. The water vapour permeable film in the laminate preferably is made of a hydrophilic copolyetherester or copolyetheramide, while the hydrophilic polymer soluble in an organic solvent preferably is a copolyetherester.
Claims14
A method of sealing seams of a waterproof, water vapor permeable article comprising a waterproof, water vapor permeable film and having seams, the method comprising
- contacting a surface of the article at least at the seams of the film with a coating solution containing a hydrophilic polymer in an organic solvent which acts as a swelling agent for the waterproof, water vapor permeable film, and
- evaporating the organic solvent to form a waterproof, water vapor permeable coating comprised of the hydrophilic polymer.
A waterproof, water vapor permeable article comprising a waterproof, water vapor permeable film having seams and comprised of at least a waterproof, water vapor permeable film and a waterproof, water vapor permeable hydrophilic polymer coating upon the waterproof, water vapor permeable film over at least the seams of the film, the article being produced by a method comprising:
- contacting a surface of the film at least at the seams of the film with a coating solution containing a hydrophilic polymer in an organic solvent which acts as a swelling agent for the waterproof, water vapor permeable film, and
- evaporating the organic solvent to form the waterproof, water vapor permeable hydrophilic polymer coating.
Dependencies are inferred from the claim text.