Disposable syringe stoppers contact medicinal fluids directly, so material selection requires evaluation for the intended use. The category name TPE does not establish freedom from allergy risks or suitability for medical use.
According to the company’s 2020 article, Long-term Materials participated in drafting an association standard organized by the China Association for Medical Devices Industry for styrenic thermoplastic elastomer (TPE-S) compounds used in disposable syringe stoppers. The original scope covered technical requirements, test methods, inspection, packaging, marking, storage and transport.
This page retains that historical participation record. The standard number, applicable materials and current requirements should be checked against formal documents.