A kind of preparation method of triangular hollow polyester staple fiber

Abstract

The invention discloses a preparation method of a triangular hollow dacron short fiber and a spinneret plate for the preparing triangular hollow dacron short fiber. Melting spinning is performed after mixing and drying of a spinning raw material, a nascent fiber for preparing triangular hollow dacron is extruded through the special-shaped hole spinneret plate, winding, filament dropping and bunching are performed in sequence, and finally flabby heat setting is performed after oil bath drafting, steam drafting and curling. In the preparation method, an arc-shaped open hole is adopted on the spinneret plate, the concave surface is outward, extruding swelling occurs during the spinning process, the concave surface is substantially a plane, and a fiber section can maintain an equilateral triangle shape well. Compared with an existing special-shaped section hollow technology, the plane of the triangular hollow dacron produced by the preparation method is good in light reflection effect and glossiness, gloss and application effects of fabrics are improved, soft effects are improved, thermal insulation is excellent, stable and efficient low-frequency sound insulation functions are provided, hollow rate of the fiber can be 30%-40%, the special-shaped degree can be 50%-60%, the hollow rate and the special-shaped degree are stable, the volume density is low, and good advantages are provided.

Description

【Technical field】 [0001] The invention relates to the field of differentiated fibers, in particular to a method for preparing triangular hollow polyester staple fibers. 【Background technique】 [0002] The cross-sectional shape of the fiber is closely related to the characteristics of the fiber. The irregular shape of the fiber cross-section makes the polyester fabric feel fluffy, improves the gloss effect and hand feeling, and improves the air permeability and pilling resistance of the fabric. Because the hollow fiber has a continuous cavity inside, the volume quality of the fiber is reduced, and the heat insulation and warmth retention of the fabric are improved. The special-shaped hollow polyester fiber with both special-shaped and hollow features has more advantages than round hollow fibers and special-shaped fibers. At present, most of the technology and research and development in the industry use chips as raw materials to prepare special-shaped hollow polyester staple...

AI Technical Summary

Problems solved by technology

[0003] In the production methods of the above-mentioned various hollow fibers, the spinneret of the spinning box of the melt spinning equipment used mostly adopts C-shaped holes, and it is difficult for the C-shaped holes to keep the fibers in a regular triangle shape, and the plane reflective effect of the fibers is poor. , the gloss is not ideal; moreover, the screw temperature of the screw extruder used in the melt spinning equipment is relatively high (above 275°C), and the temperature of the ring blowing is above 18°C, which is not conducive to the quenching and forming of the spinning ring blowing , the extrusion swell is relatively high, resulting in a low hollow ratio of the fiber and unstable hollowness

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