Stretchability and Properties of Linear Low Density Polyethylene Blends for Biaxially Oriented Film
Uehara Hideki, Sakauchi Kunio, Kanai Toshitaka, Yamada Toshiro
OKURA INDUSTRIAL Co.,LTD
JAPAN
Keywords: LLDPE, double bubble tubular, stretchability
In order to improve the stretchability of linear low density polyethylene(LLDPE) for double bouble tubular film(DBTF),the blending of LLDPEs have been investigated. Three linear low density polyethylenes of varing densities were blended,and several films were produced having different densities, molecular-weight distribution and composition distributions. The stretchability and properties of these films are investigated and relationship between the stretchability and the material properties are also investigated. The material properties of LLDPE which have obtained better stretchability are reported on.
Further,the stretchability of LLDPE by using the laboratory tenter biaxial stretcher and the dluble bubble tubular machine are compared. The prediction of the stretchability for the DBTF by using the laboratory tenter stretched film(LTSF) is reported,following up on the previous paper.