USE OF A HIGHLY VISCOUS LARGELY AMORPHOUS POLYOLEFIN FOR THE PRODUCTION OF A FILM

摘要

The invention relates to a mono- or multi-layered film with good layer adhesion and good transparency produced from a polyolefin, comprising the following monomer units: a) max. 25 wt. % of units derived from ethers, b) max. 75 wt. % of units derived from propene and c) 5 to 100 wt. % of units derived from an a-olefin with 4 to 20 C atoms, whereby the polyolefin has the following parameters: d) a weight average molecular weight in the range of 70,000 to 10,000,000 g/mol, e) a polydispersity in the range of 4 to 60, f) a fusion viscosity, measured by oscillation rheometry with a shear rate of 1 Hz at 190 °C, in the range of 100,000 to 100,000,000 mPa s, g) a needle penetration in the range of 3 to 70 0.1 mm, h) a fusion enthalpy in the range of 2 to 100 J/g, i) a glass transition temperature Tg in the range of -15 °C to -80 °C, and j) an end to the fusion region of the crystalline fraction in the range of 85 to 175 °C.