U.S. Develops Novel Polyolefin Packaging Materials
The United States has introduced a new type of polyolefin series and its new resins, new processes, and new additives. It has a variety of excellent properties such as high transparency. For example, the isotactic polypropylene and syndiotactic polypropylene homopolymers have a melt flow rate of 2î€5 g/10 min, and the stretching forming pressures are 1î€0488Ã—106 KPa and 5î€796Ã—105 KPa, respectively, and the tensile yield pressures are respectively 3 î€176Ã—104KPa and 2î€415Ã—104KPa, the haze is 58.7% and 15.5%, respectively. Blending highly transparent syndiotactic polypropylene (70%) with conventional polypropylene homopolymer (30%) will have far greater clarity than other materials. Particularly suitable for packaging requiring high transparency.