| 摘要 |
<p>There is provided the use of a ground particulate calcium carbonate material having a d50 of less than 1.0 ν as a mineral filler in a stretched thermoplastic polyolefin film, for the purpose of increasing the moisture vapour permeability of said film. Also disclosed is a method of increasing the moisture vapour permeability of a stretched, mineral-filled thermoplastic polyolefin film which method comprises using, as the mineral filler, a ground calcium carbonate having a d50 of less than 1.0 ν.</p> |
