Towel raw material for the detection of point
Towel raw material for analysis is the basic content of the towel product testing, but also to determine the merits of quality towel products an important basis. Towel material for analysis, in fact, include a variety of fibers towel fabric yarns qualitative identification and quantitative analysis of two aspects. Of course, for pure spinning towel products, simply qualitative identification; and for blended towel, you need to first yarn fibers towel species were identified, and then determine the percentage of various fiber components.
Identification towel fiber is to use physical methods, chemical methods and instruments like measuring an unknown fiber has properties, various properties with known fiber has compared to a qualitative test method for fiber identification. Common methods of identification are: sensory method, combustion, microscopy, chemical dissolution method, melting method, drugs coloring and infrared spectroscopy and so on. In practice, identification, often need to use a variety of methods, after comprehensive analysis and research in order to obtain results.
General Procedure towel fiber identification is to first determine the categories, then the separation of species, then do further verification. Such as the use of combustion identified towel natural fiber and chemical fiber, using microscopy and identification of various types of plant fiber towel animal towel fibers. For the chemical fiber, the use of chlorine and nitrogen analysis method distinguished no chlorine, no nitrogen, chlorine does not contain nitrogen, chlorine nitrogen, chlorine-containing nitrogen-containing five cases, and then the melting point of the chemical fiber, the relative differences in density, birefringence, solubility, etc., individually distinguish various types of synthetic fiber and recycled fiber. For some specialty fibers, infrared absorption spectroscopy can be used for identification.
In the differential towels and mixed fibers blended, generally be observed with a microscope, to confirm which contain several fibers, and then use other appropriate methods individually identified. For the fiber after dyeing or finishing, staining first general release or other appropriate pretreatment, it is possible to ensure accurate and reliable identification of towels. Two-component fibers or composite fibers, usually first observed with a microscope, and then one by one by discriminating dissolution method and infrared absorption spectroscopy.
Quantitative analysis of blended material is blended material After the qualitative identification, according to the chemical properties of the fibers, the choice of appropriate chemical reagents, according to a certain dissolution method, the blended product of one or several components of fibrinolytic, weight Loss from dissolving or insoluble fiber content of each component is calculated fibers.
Many domestic and foreign countries and regions, the majority of the textile fiber material analysis methods have developed a corresponding standard. Therefore, when the raw material towel products were analyzed according to the different testing requirements, use of different standards for testing. Of course, there are some of the fibers (especially some of the new fiber) or detection methods blended towel products, there is no standard to follow, then it should be based on the specific nature of the fiber towels, towels select the appropriate method of analysis to identify and towels.