Method for producing fine denier terylene BCF filaments and spinning plate

Abstract

The invention relates to a method for producing fine denier terylene BCF filaments and a spinning plate. The method comprises the following steps of: (1) pre-crystallizing and drying terylene slices, and then melting and extruding the terylene slices through screws, wherein the terylene slices are PET and the viscosity is 0.64 to 1.0; (2) performing spinning through the spinning plate, wherein the hole number of the spinning plate is 330 to 380, the holes are circular holes or three-leaf holes, the aperture of the circular holes is 0.4 to 0.6 millimeters, the ratio of the length to the aperture is 1.5: 1 to 3: 1, the leaf width of the three-leaf holes is 0.1 to 0.1 millimeter, the leaf length is 0.5 to 0.8 millimeter, and the ratio of the length to the aperture is 2: 1 to 3: 1; (3) cooling, namely cooling with side air at the air speed of between 0.1 and 0.15 meter per second and at the temperature of between 18 and 25 DEG C; (4) oiling and drafting; (5) BCF bulking; and (6) cooling shaping, outputting, entanglement network and winding, wherein the fiber number of the fine denier terylene BCF filaments is 1,100 to 2,000 decitexes, and the fiber number of monofilaments is 3.06 to 5.56dpf.

Description

Production method of fine denier polyester BCF filament and spinneret used technical field The invention relates to a production method of fine-denier polyester BCF filament and a spinneret used therefor. Background technique BCF filament, also known as bulked continuous filament yarn, expands and deforms the stretched multifilament yarn, and fixes its bulking and curling effects after setting, so the gap between fibers increases, making the yarn body bulky. BCF filaments are mainly used in carpet weaving. The existing BCF filament production process is a one-step method, and the main steps include spinning, cooling, oiling, stretching, BCF puffing and deformation, cooling and shaping, output, entanglement network, and winding. This one-step production process has high requirements, and it is difficult to obtain filaments with a single filament fineness below 6dpf. Fine denier polyester BCF filament has good bulkiness, soft and comfortable hand feeling. It has the char...

AI Technical Summary

Problems solved by technology

At present, my country's ultra-fine denier polyester BCF carpet fiber manufacturing is still basically blank, all of which need to be imported, and the price is high, which seriously restricts the development of my country's carpet industry.

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