Flexible tubing material and method of forming the material

摘要

A flexible tubing material includes a radiation crosslinked blend of a first elastomeric polymer including a styrenic thermoplastic elastomer, an ethylene vinyl acetate elastomer, a polyolefin elastomer with a second elastomeric polymer including a polyolefin elastomer, a diene elastomer, or combination thereof, with the proviso that the first elastomeric polymer and the second elastomeric polymer are different. In an embodiment, a method of making a material includes providing the first elastomeric polymer, providing the second elastomeric polymer, blending the first elastomeric polymer and the second elastomeric polymer, extruding or injection molding the blend, and crosslinking the blend with radiation.

主权项

1. A flexible biopharmaceutical thermoplastic elastomer tubing material comprising a gamma and/or e-beam radiation crosslinked blend of:
a) a first elastomeric polymer including a styrenic thermoplastic elastomer comprising a styrene-butadiene-styrene (SBS), a styrene-isoprene- styrene (SIS),a styrene-ethylene butylene-styrene (SEBS), a styrene-ethylene propylene- styrene (SEPS), a styrene-ethylene-ethylene-butadiene-styrene (SEEBS), a styrene-ethylene-ethylene-propylene-styrene (SEEPS), a styrene-isoprene-butadiene-styrene (SIBS), or any combination thereof; b) a second elastomeric polymer including a polyolefin elastomer, with the proviso that the first elastomeric polymer and the second elastomeric polymer are different; and c) a plasticizer comprising a mineral oil, wherein the first elastomeric polymer is present in an amount of at least 10% by weight of the blend and the tubing material has a compression set of 18% or less at a temperature of about 121 ° C.