Method for spinning 8-shaped hollow staple fiber through regenerated polyester
A regenerated polyester, figure-8 technology, applied in the directions of melt spinning, fiber processing, hollow filament manufacturing, etc., to achieve the effects of improved fiber profile, high hollowness, and improved moisture absorption and air permeability.
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[0024] A method for spinning figure-eight hollow staple fibers with recycled polyester material according to the present invention and the spinneret used therein are realized through the following steps: select recycled polyester material with an intrinsic viscosity of 0.58dl / g as raw material, send Put it into a vacuum drum dryer for drying, the drying temperature is 155°C, and the drying time is about 8 hours, so that the moisture content of the dried spinning raw material is less than 100PPM; the dried spinning raw material is fed into the melt spinning equipment for melt spinning , the molten spinning raw material is extruded into the spinning box through a screw extruder, and is sprayed out from the spinneret holes of the 8-shaped hollow spinneret to form nascent fibers; after that, the nascent fibers are cooled by a ring blowing device, and then passed through Winding, clustering, drafting, crimping, oiling, relaxing heat setting, cutting, and packaging to produce 8-shape...
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