| 摘要 |
<p>A covering film is described for foodstuffs which are warmed in a microwave oven. The covering film contains a copolyether ester built up from recurring units of the following formula: <IMAGE> in which R1 is an alkylene radical having 1 to 6 carbon atoms or a cycloalkanedimethylene radical having 7 or 8 carbon atoms or a polyoxyalkylene radical having a mean molecular weight, specified as the weight average, in the range from 900 to 4,000, and R2 is a phenylene radical.</p> |
