The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 1990
Filed:
Oct. 12, 1988
Cornelius M Vrouenraets, Dieren, NL;
Hans R Herberts, Drempt, NL;
Akzo N. V., Arnhem, NL;
Abstract
Absorbent sanitary products, such as diapers, pads, or sanitary napkins, comprising a copolyether ester film having a water permeability of at most 0.02 g/cm.sup.2 /h at 23.degree. C. and 0.07 bar and a water vapor permeability of at least 500 g/m.sup.2 /day at 23.degree. C. and 100-50% relative humidity, a liquid-permeable layer, and a liquid-absorbing bibulous layer. The copolyether ester of the film contains 5-55 weight % of long-chain glycols having a molecular weight of 800-6000 with an atomic ratio of carbon to oxygen of 2.0 to 3.7 %. The film is made from copolyether ester chips which in water at 23.degree. C. have a water absorption of at most 15 weight %.