Patent ID: 9121815
Filing Date: 2015-09-01
Classification: G01J,G01N

Abstract:
1. A method for measuring a fiber content of polyethyleneterephthalate (PET) and polytrimethyleneterephthalate (PTT) fibers, the method comprising: a qualitative analysis step of identifying a presence of polyethyleneterephthalate (PET) and polytrimethyleneterephthalate (PTT) fibers in a mixed-spun fiber product; and a quantitative analysis step of measuring the fiber content by a microscopic count through difference in color between PET and PTT fibers by birefringence in a cross polarization state of a polarized light microscope (PLM), wherein the quantitative analysis step measures the fiber content by the following Equations 1 and 2 when a cross-section of the fiber is circular