Introduction of common methods for fiber oil content detection
The chemical fiber oil content refers to the dry weight of the chemical fiber on the dry weight of the oil fiber. The fiber oiling rate refers to the dry weight of the oil on the chemical fiber as a percentage of the dry mass of the fiber after the degreaser. However, the oil content of the fiber is closely related to the spinnability of the fiber. The fiber with low oil content is prone to static phenomenon, and the oil content is too high, which tends to cause sticking, which will affect the normal production of textile production and processing. The content of the chemical fiber oil agent is generally controlled to meet the requirements of antistatic property and smoothness, and the oil-containing agent is preferably used. The measurement of the oil content is usually carried out by extraction (except for the use of more rapid extrusion method). , weighing method).
Common chemical fiber oil content
Commonly used detection methods in modern industry:
Extraction method: using the property that the oil agent can be dissolved in the organic solvent, the non-fibrous material on the surface of the fiber is extracted by a Soxhlet extractor, and the obtained extract liquid is evaporated and dried to obtain a non-volatile oil agent. The oil content of the sample can be calculated based on the mass of the oil and the fiber.
Neutral soap washing method: using the neutral soap liquid and the oil agent on the DTY, the oil agent on the DTY is washed away under the action of the washing power, and the oil content is calculated according to the change of the mass before and after the fiber. .
Nuclear magnetic resonance method: using magnetic resonance spectroscopy (NMR), a magnetic pulse magnetic field is emitted to the sample. When the magnetic field is canceled, the electromagnetic feedback signal of the sample will be attenuated. Since the signal from the fiber decays faster than the signal from the oil, from this The difference between the two, through a certain conversion, can be derived from the oil content of the fiber.
National standard test method for fiber oil content
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