Blends composed of styrene-butadiene block copolymers and of polyolefins for transparent, elastic films
A polymer film, comprising from 1 to 20% by weight of a thermoplastic elastomer based on styrene (S-TPE) from 80 to 99% by weight of a polyolefin.
1. A polymer film comprising
A) from 3 to 5% by weight of a thermoplastic elastomer based on styrene (S-TPE) and
B) from 95 to 97% by weight of a polyolefin.
2. The polymer film according to claim 1 , wherein component A) is a styrene-butadiene block copolymer of S-(S/B)-S structure, where S is a polystyrene block and S/B is a styrene-butadiene copolymer block.
3. The polymer film according to claim 1 , wherein component A) is composed of from 15 to 50% by weight of butadiene and from 50 to 85% by weight of styrene.
4. The polymer film according to claim 2 , wherein the styrene-butadiene copolymer block S/B of component A) has random distribution of the styrene units and butadiene units.
5. The polymer film according to claim 2 , wherein the styrene-butadiene copolymer block (S/B) of component A) is composed of from 30 to 70% by weight of styrene and from 25 to 70% by weight of butadiene.
6. The polymer film according to claim 2 , wherein the proportion of the polystyrene blocks S is in the range from 5 to 40% by weight.
7. The polymer film according to claim 2 , wherein the 1,2-vinyl content in the styrene-butadiene copolymer block (S/B) of component A) is below 20%.
8. The polymer film according to claim 1 , which comprises, as polyolefin, a high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), or ethylene-acrylic copolymer.
9. The polymer film according to claim 1 , whose thickness is in the range from 1 to 250 μm.
10. A multilayer film comprising at least one layer composed of a polymer film according to claim 1 .
11. A multilayer film comprising at least one layer composed of a polymer film according to claim 2 .
12. A multilayer film comprising at least one layer composed of a polymer film according to claim 3 .
13. A multilayer film comprising at least one layer composed of a polymer film according to claim 4 .
14. A multilayer film comprising at least one layer composed of a polymer film according to claim 5 .
15. A multilayer film comprising at least one layer composed of a polymer film according to claim 6 .
16. A multilayer film comprising at least one layer composed of a polymer film according to claim 7 .
17. A multilayer film comprising at least one layer composed of a polymer film according to claim 8 .
18. A multilayer film comprising at least one layer composed of a polymer film according to claim 9 .