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Flash polypropylene fiber and preparation method thereof

A technology of polypropylene fiber and isotactic polypropylene, applied in the field of preparation of flashing polypropylene fiber, to achieve the effect of improving dispersion uniformity, simple microporous structure, and good economic benefits

Inactive Publication Date: 2014-02-26
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No relevant research has been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put isotactic polypropylene slices with a melt index of 18g / 10min into the screw extruder, extrude and melt at 230-250°C, and spin at 250°C to obtain semi-finished products of shiny polypropylene fibers; spinneret for spinning It has a three-lobe spinneret hole, the leaf width of the plate hole is 0.1, and the leaf length is 0.6. Stretch the semi-finished fiber about 4 times at 70-80°C to obtain a three-lobed polypropylene fiber with a certain flash effect. The monofilament linear density of the fiber is 3.3dtex, the breaking strength is 2.8cN / dtex, the breaking elongation is about 30%, and the degree of irregular shape is 59%.

Embodiment 2

[0017] Mix the isotactic polypropylene slices with a melt index of 18g / 10min and the sorbitol-based nucleating agent Meride 3988 at a mass ratio of 99.7 / 0.3, and add the flow-aiding dispersant polypropylene wax at the same time. The amount of polypropylene wax added is Merid Get 1 / 3 of the weight of 3988. The three are mixed in a high mixer at 50-60°C for 10 minutes, then added to a screw extruder, extruded and melted at 230-250°C, spun at 240°C, stretched at 60-70°C About 4 times. The spinneret for spinning and forming has a three-lobed spinneret hole, the blade width of the hole is 0.1, and the blade length is 0.6. The linear density of fiber monofilament is 3.3dtex, the breaking strength is 3.6cN / dtex, the elongation at break is 30%, the degree of irregularity is 54%, and the fiber flash effect is better than that of pure polypropylene trilobal fiber.

Embodiment 3

[0019] Mix the isotactic polypropylene slices with a melt index of 18g / 10min and the sorbitol-based nucleating agent Meride 3988 at a mass ratio of 99.4 / 0.6, and add the flow-aiding dispersant polypropylene wax at the same time. The amount of polypropylene wax added is Merid Get 1 / 3 of the weight of 3988. The three are mixed in a high mixer at 50-60°C for 10 minutes, then added to a screw extruder, extruded and melted at 230-250°C, spun at 240°C, stretched at 60-70°C About 4 times. The spinneret for spinning and forming has a three-lobed spinneret hole, the blade width of the hole is 0.1, and the blade length is 0.6. The linear density of fiber monofilament is 2.65dtex, the breaking strength is 3.8cN / dtex, the breaking elongation is 30%, the degree of irregularity is 60%, and the fiber flash effect is better than that of pure polypropylene trilobal fiber.

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Abstract

The invention provides a three-leaf flash polypropylene fiber. The flash polypropylene fiber is characterized in that: the section of the fiber is in a three-leaf shape; and a fiber forming process comprises the following steps of: adding sorbitol nucleating agent and flow aid dispersant into an isotactic polypropylene slice with melt index of 18 to 35 grams per 10 minutes in a ratio, performing high mixing and extraction melting, performing extrusion from three-leaf spinneret orifices at a low temperature, cooling and molding, stretching and sizing to obtain the polypropylene fiber with flash effect. The polypropylene fiber has obvious flash effect, large specific surface area, strong dirt absorption and soft handfeel, and the mechanical property of the polypropylene fiber is obviously improved; and industrialized production can be performed by using the conventional equipment and processes, and the polypropylene fiber has considerable economic and social benefits.

Description

Technical field: [0001] The invention belongs to the field of differentiated fibers, and in particular relates to a preparation technology of flashing polypropylene fibers. Background technique: [0002] Polypropylene fiber has excellent physical and mechanical properties, rich sources of raw materials, simple manufacturing process and low cost, so it has broad application prospects in clothing, decoration and industrial supplies. Ordinary polypropylene fibers have a circular cross-section, which feels stiff and waxy, so many researchers have devoted themselves to the research of special-shaped polypropylene fibers. The developed special-shaped fibers include star-shaped, triangular, polygonal, etc. These fibers are improving the waxy feeling. At the same time, you will get an improvement in the gloss effect. However, due to the crystallization ability of polypropylene, its kinetic crystallization ability is 6 times that of polyester (polyethylene terephthalate), so it is e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/10D01D5/253
Inventor 郭静张欣
Owner DALIAN POLYTECHNIC UNIVERSITY
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