ISO 16365-3:2014规定了一种酯的测定方法，包括酯热塑性聚氨酯（TPU）和乙醚TPU，用于质量控制，无需复杂的仪器，避免或尽量减少TPU材料的长期微生物测试。所述方法用于区分主要TPU类型和表征TPU混合物。 该方法适用于基于4,4'-二苯基甲烷二异氰酸酯（MDI）的所有线性聚氨酯，并旨在减少与微生物抗性和水解相关的长期试验。

ISO 16365-3:2014 specifies a method for the determination of esters including ester thermoplastic polyurethanes (TPU) and ether TPU for quality control without the necessity of sophisticated instrumentation and avoids or minimizes long-term microbial testing for TPU materials. The method described is used to distinguish major TPU types and characterize TPU mixtures. The method is applicable to all linear polyurethanes based on 4,4'-diphenylmethane diisocyanate (MDI) and is intended for instance to minimize long-term tests related to microbe resistance and hydrolysis.