<p>The invention relates to a rotomolding process for forming a multi-layer article of two different polymers with different melting points in which an outer layer polymer powder is added to a rotational molder along with an inner layer polymer powder that is separated from the outer layer powder by a release film. The release film has a particular melting point that is greater than that of the outer layer polymer and preferably between the melting points of the inside layer and outside layer polymers. In one embodiment, the release layer forms an enclosure or bag in which the inner layer (higher melting point) powder is enclosed. In another embodiment the release film forms a barrier between an insulated cavity and the mold. The process provides a means for a "one-shot" rotomolding method.</p>
申请公布号
WO2007121090(A2)
申请公布日期
2007.10.25
申请号
WO2007US65946
申请日期
2007.04.04
申请人
ARKEMA INC.;O'BRIEN, GREGORY, S.;CLAY, BRUCE;PARTRIDGE, RONALD
发明人
O'BRIEN, GREGORY, S.;CLAY, BRUCE;PARTRIDGE, RONALD