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Preparation method of heart-shaped composite fiber

A composite fiber, heart-shaped technology, applied in fiber processing, textiles and papermaking, single-component polyester rayon, etc., can solve the problem of unstable spinning process, poor curling performance of circular composite fibers, and composite fiber quality It is not easy to control and other problems, so as to achieve the effect of good crimping performance and stable spinning process

Inactive Publication Date: 2012-03-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing cross-sections of composite fibers with crimping performance are mainly round or peanut-shaped. The crimping performance of the circular composite fiber is not good, and the crimping performance of the peanut-shaped composite fiber is better, but the spinning process is unstable, which makes the quality of the composite fiber difficult to control.

Method used

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  • Preparation method of heart-shaped composite fiber
  • Preparation method of heart-shaped composite fiber
  • Preparation method of heart-shaped composite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Production embodiment of heart-shaped PET / PTT composite POY-DTY

[0032] Raw material composition: PET chips (intrinsic viscosity 0.6dL / g, melting point 260°C)

[0033] PTT chips (intrinsic viscosity 1.3dL / g, melting point 233°C)

[0034] The PTT slices are crystallized and dried at a drying temperature of 130°C and a drying time of 8 hours. The drying medium is hot air with a dew point of -40°C; then it is sent to a screw extruder with a temperature set at 250-280°C for melt extrusion to obtain PTT melt. Crystallization and drying of PET slices at a drying temperature of 140°C and a drying time of 8 hours. The drying medium is hot air with a dew point of -40°C; and then melted and extruded into a screw extruder with a temperature setting of 280-300°C to obtain PET Melt; PTT melt and PET melt are mixed into the composite spinning assembly with a weight ratio of 30:70 for spinning, the spinning temperature is 300 ° C, and the heart-shaped composite fiber i...

Embodiment 2

[0040] Embodiment 2: Production embodiment of heart-shaped PBT / PTT composite POY-DTY

[0041] Raw material composition: PBT chips (intrinsic viscosity 0.8dL / g, melting point 226°C)

[0042] PTT chips (intrinsic viscosity 1.3dL / g, melting point 233°C)

[0043] The PTT slices are crystallized and dried at a drying temperature of 190°C and a drying time of 3 hours. The drying medium is hot air with a dew point of -80°C; then it is sent to a screw extruder with a temperature set at 250-280°C for melt extrusion to obtain PTT melt. body; crystallize and dry PBT slices at a drying temperature of 140°C and a drying time of 8 hours. The drying medium is hot air with a dew point of -80°C; and then sent to a screw extruder with a temperature setting of 230-280°C for melt extrusion to obtain PBT Melt; PTT melt and PBT melt are mixed into the composite spinning assembly with a weight ratio of 70:30 for spinning, the spinning temperature is 280 ° C, and the heart-shaped composite fiber is ...

Embodiment 3

[0046] Embodiment 3: Production embodiment of heart-shaped CDP / PTT composite POY-DTY

[0047] Raw material composition: CDP chips (intrinsic viscosity 0.5dL / g, melting point 220°C)

[0048] PTT chips (intrinsic viscosity 1.3dL / g, melting point 233°C)

[0049] Dry the PTT slices for crystallization at a temperature of 160°C for 5 hours, with hot air as the drying medium, with a dew point of -70°C; then send them into a screw extruder with a temperature set at 250-280°C for melt extrusion to obtain a PTT melt; CDP slices are crystallized and dried at a temperature of 150°C for 6 hours, and the drying medium is hot air with a dew point of -70°C; then they are sent to a screw extruder with a temperature setting of 230-270°C for melting and extrusion to obtain a CDP melt; The body and the CDP melt are mixed into the composite spinning assembly at a weight ratio of 45:55 for spinning, and the spinning temperature is 250 ° C, and the heart-shaped composite fiber is obtained by spray...

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Abstract

The invention relates to a preparation method of a heart-shaped composite fiber and a filament spraying plate used by the same, belonging to the technical field of preparation of polyester fibers. The preparation method is characterized by comprising the following concrete steps: slicing polytrimethylene terephthalate for crystallization, drying and melt extrusion; slicing another kind of polyester for crystallization, drying and melt extrusion; mixing the spinning filaments, and spraying the filaments by the filament spraying plate to obtain the heart-shaped composite fiber; cooling the heart-shaped composite fiber by lateral blow for passing through an upper filament guiding disc and a lower filament guiding disc to be coiled by a coiler, and obtaining a pre-oriented fiber; enabling thepre-oriented fiber to sequentially pass through a first hot box, a false twister and a second hot box for hot drawing and then coiling, and obtaining elastic filaments; or cooling the heart-shaped composite fiber by lateral blow for oiling on an oil disc and sequentially passing through a first hot roller and a second hot roller for hot drawing and then coiling by a coiler, and obtaining drawn filaments. Heart-shaped filament spraying holes are arranged on the filament spraying plate. The invention can prepare the heart-shaped composite fiber with better coiling performance and stable spinning processes.

Description

technical field [0001] The invention relates to a preparation method of a heart-shaped composite fiber and a spinneret used therein, and belongs to the technical field of polyester fiber preparation. Background technique [0002] The natural three-dimensional crimp and good elasticity side-by-side composite fiber has a structure similar to that of wool-like keratin fiber. The principle of making this composite fiber is to slice two fiber-forming polymers with different thermal expansion and contraction properties or wet expansion and contraction properties (usually polyethylene terephthalate PET and polytrimethylene terephthalate PTT). ) is melted and extruded into a spinneret hole of a certain shape, and the two polymer melts interact to form a single filament side by side similar to the normal and partial cortex of wool to form a three-dimensional curl. Since this crimp is the intrinsic nature of the fiber, it is durable and different from other crimps produced by mechani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F6/62D01D5/32D01D5/253
Inventor 蔡磊王学利俞建勇李发学
Owner DONGHUA UNIV