| 摘要 |
<p>A packaging laminate comprises: (a) a sealing layer comprising: (i) 40-80 wt.% of a 2-3C random copolymer with a C2 content of 1-15 wt.%, or (ii) 40-80 wt.% of a polymer mixt. based on (ii.1) 60-98 wt.% of a crystalline copolymer made from 85-99.5 wt.% propylene, and ethylene and/or an alpha -olefin of formula CH2=CHR, where R is a 2-8C alkyl gp., and (ii.2) 2-40 wt.% of an elastic copolymer made from 20-70 wt.% ethylene, and propylene and/or an alpha -olefin of formula CH2=CHR, or (iii) 40-80 wt.% of a highly amorphous polypropylene contg.≤10 wt.% crystalline polypropylene and having a melt enthalpy of≤40 J/g and a melt flow index (MFI) of 0.1-100 g/10 min. (the polypropylene is either a homopolymer or a copolymer contg.≥1 alpha -olefin and at≥80 mol.% polypropylene, and (iv) 20-60 wt.% of an ethylene polymerisate, and (b) a carrier layer comprising≥1 layer of a thermoplastic polymer.</p> |
