| 摘要 |
The present invention relates in a first embodiment to a polymer film comprising a propylene random copolymer with a total comonomer content of 4.5 to 12 mol% wherein the sealing initiation temperature SIT of the film is Tm- 30 DEG C or less, preferably Tm - 33 DEG C or less, in a second embodiment to a polymer film comprising a propylene random copolymer with a total comonomer content of 4.5 to 12 mol% wherein the film is having a relative reduction of the static friction value (inside-inside) from one to four days of 35 % or more, preferably 40 % or more, in a third embodiment to a polymer film comprising a propylene random copolymer with a total comonomer content of 4.5 to 12 mol% wherein the distribution of the comonomer in the random copolymer determined according to TREF method is multimodal, preferably bimodal, in a fourth embodiment to a polymer film comprising a propylene random copolymer with a total comonomer content of 4.5 to 12 mol%, wherein the copolymer is having an elution interval of 50 DEG C or more, and in a fifth embodiment to a polymer film comprising a copolymer with a total comonomer content of 4.5 to 12 mol% wherein the random copolymer is a unimodal polymer and the elution interval is determined by the equation <DF>Y ≤ 4.5 . m + 16 </DF> wherein Y is the elution interval in DEG C and m is the percentage of ethylene in the copolymer in wt.%. |
