Patent ID: 9732198
Date: 2017-08-15
CPC Classifications: B29C,B29D,B29K,B32B,C08J,C08L

Claim:
1. An extruded air cooled blown film having a) a total thickness of 5 to 500 μm, b) a mono-layer structure or 2 to 9 coextruded layers, c) at least one layer L containing a polymer selected from the group consisting of polypropylene homopolymers, polypropylene random copolymers, hetero-phasic polypropylene block copolymers, or any mixtures thereof, said polymer having a melt flow rate, according to ASTM D-1238, of 0.1 to 10 dg/min at 230° C. and 2.16 kg, said layer L further containing 0.001 to 2%, relative to the weight of the polymer, of a nucleating agent of formula (IA), (IB) or (IC), wherein x and y are an integer from 2 to 6; z′ and z″ independently of one another are an integer from 1 to 5 with the proviso that the sum of z′ and z″ is an integer from 2 to 6; X a residue which is formed by elimination of x carboxyl groups of a saturated or unsaturated alicyclic polycarboxylic acid having 7 to 25 carbon atoms or a residue which is formed by elimination of x carboxyl groups of an aromatic polycarboxylic acid having 8 to 25 carbon atoms; any of said polycarboxylic acids optionally contains further hetero atoms in its skeleton; the radicals X C C C C (C bis[C a bicyclic or tricyclic hydrocarbon radical with 5 to 20 carbon atoms unsubstituted or substituted by one or more C phenyl unsubstituted or substituted by one or more radicals selected from C phenyl-C phenylethenyl unsubstituted or substituted by one or more C biphenyl-(C naphthyl unsubstituted or substituted by one or more C naphthyl-C naphthoxymethyl unsubstituted or substituted by one or more C biphenylenyl, fluorenyl, anthryl; a 5- to 6-membered heterocyclic radical unsubstituted or substituted by one or more C a C tri(C tri(C Y a residue which is formed by elimination of y amino groups of a saturated or unsaturated alicyclic polyamine having 6 to 25 carbon atoms or a residue which is formed by elimination of y amino groups of an aromatic polyamine having 6 to 25 carbon atoms; any of said polyamines optionally contains further hetero atoms in its skeleton; the radicals Y Z a residue which is formed by elimination of z′ amino groups and z″ carboxyl groups of a saturated or unsaturated alicyclic amino carboxylic acid having 7 to 25 carbon atoms or a residue which is formed by elimination of z′ amino groups and z″ carboxyl groups of an aromatic amino carboxylic acid having 7 to 25 carbon atoms; any of said amino carboxylic acids optionally contains further hetero atoms in its skeleton; and the radicals Z