How to improve the transparence of the film?

The polyolefin is a crystalline polymer，the main factors affecting the transparency is the resin raw materials, the best way to improve the film transparency is using lower crystallinity and fine spherulites.Advanced technology only to to improve the transparency to a certain extent. Please find following reason and operation of the film blowing machine:
1.The extrusion temperature is too low, the melt has bad plasticization, so we need improve the melt temperature.
2.The poor cooling effact the transparency, so we need increasing cooling air volume.
3.The resin ball has much water, so the resin ball should be full drying.