| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat seal film of excellent non-sorption to a fragrant ingredient, and to provide a wrapper bag formed of the film and having a high aroma retaining property. <P>SOLUTION: The heat seal film includes a thermal fusion layer containing an ethylene-vinyl alcohol copolymer having a content of ethylene of 20-70 mol%, and a saponification number of 90 mol% or more. The heal seal film has an equilibrium moisture content of 0.5-5.0 mass%, wherein the thermal fusion layer has a temperature of 23°C and a relative humidity of 50% or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
