Fast blooming surfactants for use in fluid transport webs

A - Human Necessities – 61 – L

Patent

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Details

A61L 15/48 (2006.01) A61F 13/15 (2006.01)

Patent

CA 2365835

Disclosed are fast blooming surfactants that are suitable for inclusion in film compositions that will be subsequently treated with a low surface energy material to create a surface energy gradient between the underlying polymeric structure of the film and spaced apart microscopic depositions of the low surface energy material. The surfactants have a permeation rare of less than 240 hours, a surface tension in an aqueous solution at a concentration that is greater than the critical micelle concentration that lies between the critical surface tension if the underlying polymeric structure of the web material and the critical surface tension of the low surface energy depositions; and an HLB between about 6 and about 16. Preferred surfactants also have a weight loss on heating to 250°C that is less than about 20%. More preferred surfactants have a hydrophobic chain that is substantially saturated.

L'invention concerne des tensio-actifs à efflorescence rapide indiqués dans des compositions de films qui sont traitées ultérieurement avec une matière à faible énergie de surface pour produire un gradient d'énergie de surface entre la structure polymère sous-jacente du film et les dépôts microscopiques espacés de la matière à faible énergie de surface. Les tensio-actifs possèdent un coefficient de perméation inférieur à 240 heures ; une tension superficielle dans une solution aqueuse dans une concentration supérieure à la concentration critique de micelles entre la tension superficielle critique de la structure sous-jacente de la matière de voile et la tension superficielle critique des dépôts à faible énergie de surface ; et un rapport hydrophile-lipophile compris entre 6 et 16 environ. De préférence, les tensio-actifs présentent également une perte de poids au chauffage à 250 DEG C inférieure à 20 % environ. Idéalement, les tensio-actifs possèdent une chaîne hydrophobe sensiblement saturée.

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