The so-called differentiated polypropylene fiber is modified by physical or chemical methods on the basis of the original chemical fiber. This type of fiber not only retains the basic characteristics of the original fiber variety, but also overcomes its inherent shortcomings. Conventional fibers Differential methods include physical modification (mainly changing the physical structure of the polymer to change the fiber properties), chemical modification (using copolymerization, grafting or cross-linking to change the polymer structure inside the fiber, Thereby changing the properties of the fiber), process modification (using physical or chemical methods to change the fiber properties in the fiber production process) and comprehensive modification, according to the modification period, it can be divided into pre-spinning modification, spinning process Medium modification and post-filament modification.
