This standard specifies the determination of three different types of polyethylene terephthalate fiber (PET), polytrimethylene terephthalate fiber (PTT) and polybutylene terephthalate fiber (PBT) by NMR method. Method for fiber content of polyester blends. This standard applies to textiles containing polyester fibers.
GB/T 33269-2016 Referenced Document
GB/T 2910 Textile--Binary fibre mixtures--Quantitative chemical analysis