Multilayer flexible tubing
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsZhizhong Liu, Charles Golub, Heidi Sardinha, Wayne Edward Garver, Mark Colton, Mark Simon
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Abstract
A flexible tube includes a first layer comprising a polyolefin material having a flexural modulus of not greater than 150 MPa and includes a second layer directly bonded to and in direct contact with the first layer. The second layer comprising a blend of propylenic polymer and styrenic block copolymer.
Claims20
A method of forming a flexible tube, the method comprising:
- extruding a first layer comprising polyolefin, the first layer having a flexural modulus of not greater than 150 MPa;
- and
- coextruding with the first layer a second layer directly contacting and bonded directly to the first layer, the second layer comprising a blend of propylenic polymer and styrenic block copolymer.
A flexible tube comprising a blend of propylenic polymer and styrenic block copolymer, the blend having a loss tangent value (tan δ) at 25° C. of at least 0.1, the blend being free of plasticizer or processing aid.
A flexible tube comprising a polymer blend comprising propylenic polymer in a range of 30 wt % to 60 wt % and styrenic block copolymer in a range of 40 wt % to 70 wt %, the blend exhibiting a loss tangent value (tan δ) at 25° C. of at least 0.1.
Dependencies are inferred from the claim text.