PAWTUCKET, RI, U.S.A., March 28, 2018: New medical-grade thermoplastic elastomers (TPEs) for injection molded plunger stoppers provide improved syringe performance, are less costly and easier to mold than natural and isoprene rubber, and provide processing advantages over thermoplastic vulcanizate (TPV) elastomers. Teknor Apex Company will introduce the compounds at NPE2018 (Booth S22045).
Stoppers molded from the new Medalist® TPEs perform well in both glass and plastic syringe barrels, achieving a consistent piston release and travel force due to a low coefficient of friction. The compounds can be over-molded onto plungers, eliminating an assembly step. In addition to grades for over-molding onto polypropylene, specialty grades are available that, unlike TPVs, can be over-molded onto engineering resins like polycarbonate, ABS, PC / ABS, acrylic, acetal, PBT, and COPE. Also unlike most TPVs, the Medalist TPEs do not require pre-drying.
与竞争对手的 TPE 相比，Medalist TPE 表现出更好的压缩永久变形，从而使更安全的密封成为可能。这些化合物可以在高腔模具中模塑。所有等级均可消毒，有自然色或黑色可供选择。
与橡胶相比，Medalist 化合物具有显著的优势，橡胶一直是注射器塞的主要材料。TPE 避免了橡胶加工中所需的固化步骤，消除了对可萃取物和可浸出物的担忧，并且与橡胶不同，它们的废料可以回收利用。作为热塑性塑料，TPE 的加工周期要短得多，适用于更复杂的设计和更严格的尺寸公差。
“塞子必须平稳地靠在注射器针筒壁上移动，提供出色的密封以保持药物的完整性，并且具有化学惰性以防止与注射器内容物发生相互作用，”受管制产品高级市场经理 Ross van Royen 说。“Teknor Apex 开发了一系列 Medalist TPE，可以满足这些性能要求，同时由于易于加工而提供巨大的经济优势。”
Teknor Apex produces Medalist compounds in ISO-13485 facilities in the USA and Singapore. All Medalist materials are made with FDA listed ingredients, are certified to ISO 10993-5 standards for biocompatibility, and are REACH SVHC compliant. They are free of DEHP and other phthalates, BPA, and latex. Standard grades are ADM-free.
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