Coated flat articles useful in pharmaceutical and foodstuff industries - obtd. by coating carrier sheet with aq. dispersion of poly:hydroxy-alkanoate, drying, and opt. heating to sinter or melt coating

摘要

Articles are obtainable by coating on one or both faces flat carrier sheet(s) with aq. dispersion of a polyhydroxyalkanoate (I) opt. with other thermoplast (II) and drying to remove dispersion agent opt. with heating, during or after drying to temp. at which coating sinters or melts with film formation. USE/ADVANTAGE - Used in pharmaceutical and foodstuff industries, partic. for packaging also medicinal and hygiene applications e.g. wound dressings. (I) are biologically degradable and articles are readily disposed of, articles contain no solvent residues and can be formed as porous, gas- and air-permeable coatin