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Polypropylene BCF yarn is treated by placing the yarn in steam or hot air or boiling water. At this time, the fiber with high shrinkage produces a large shrinkage, located at the center of the yarn, and the low shrinkage fiber mixed together is small due to shrinkage. The extrusion forms a loop on the surface of the yarn to obtain a fluffy, full, elastic BCF yarn.
Polypropylene BCF yarn features: It combines the high strength of continuous filaments with the bulkiness of short fibers, and is characterized by high temperature resistance, friction and corrosion resistance.
Polypropylene BCF yarn performance index: Polypropylene BCF yarn woven fabric is generally dyed, napped (single or double sided) and other finishing, the fabric is required to feel soft, fluffy, elastic and even dyeing. Therefore, the bulking degree of the bulked yarn, the specification of the raw material, the uniformity of mixing, and the like are the main performance indexes.