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Hollow three-dimensional curled polylactic acid short fiber and preparation method and device system thereof

A polylactic acid short fiber, three-dimensional crimping technology, applied in short fiber formation, hollow filament manufacturing, fiber treatment, etc., can solve the problems of different and characteristic differences, achieve the effect of reducing degradation, good effect, and improving spinnability

Pending Publication Date: 2022-06-07
安徽丰原生物纤维股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characteristics of polylactic acid chips and polyester chips are significantly different, which determines that the melt spinning process of polylactic acid and polyester will be significantly different, so the short fiber production process suitable for polylactic acid still needs to be developed

Method used

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  • Hollow three-dimensional curled polylactic acid short fiber and preparation method and device system thereof
  • Hollow three-dimensional curled polylactic acid short fiber and preparation method and device system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This embodiment provides a device system for preparing hollow three-dimensional crimped polylactic acid short fibers, the schematic diagram of which is as follows: figure 1 As shown, including the sequential passage of polylactic acid: slice drying system, single-screw extruder, spinning box, high-efficiency rapid ring blowing device, tunnel, oiler, six-roller tractor, feeder, traverse reciprocating machine, cluster frame, lower frame wire guide, eight-roll wire guide, oil immersion tank, first drafting machine, oil bath drafting tank, second drafting machine, steam water bath box, third drafting machine, tension heat Setting roller, cooling spray device, three-roll godet, wire stacking machine, steam preheating box, three-dimensional crimping machine, silicone oil spraying device, traction tensioner, cutting machine, wire laying machine and relaxation heat setting device;

[0073] Wherein, the slice drying system includes a rotary drum dryer and a hot air drying tower ...

Embodiment 2

[0078] This embodiment provides a hollow three-dimensional crimped polylactic acid short fiber of 6.67dtex / 64mm, and its preparation method is as follows:

[0079] (1) Drying: The polylactic acid slices are added to the drum dryer, first dried at 95°C for 3 hours, then dried at 100°C for 3 hours, and finally dried at 105°C for 3 hours; then the slices are transferred to a hot air drying tower, where After drying at 103°C for 9h, the moisture content of the slices was measured to be less than 20ppm;

[0080] (2) feeding the dried polylactic acid slices into a single-screw extruder to extrude and melt to form a melt;

[0081] Among them, the length-diameter ratio of the screw of the single-screw extruder is 30, and the depth of the screw groove is 35.5mm. ℃, 228℃;

[0082] (3) the polylactic acid melt is sent into the spinning box through the melt conveying pipe for spinning to form melt filaments;

[0083] Among them, the spinning temperature is 220°C, the pipe length of eac...

Embodiment 3

[0097] This embodiment provides a 6.67dtex / 64mm hollow three-dimensional crimped polylactic acid short fiber, and its preparation method is as follows:

[0098] (1) Drying: The polylactic acid slices are added to the drum dryer, first dried at 95°C for 3 hours, then dried at 100°C for 3 hours, and finally dried at 105°C for 3 hours; then the slices are transferred to a hot air drying tower, where After drying at 100℃ for 10h, the moisture content of the slices was measured to be less than 20ppm;

[0099] (2) feeding the dried polylactic acid slices into a single-screw extruder to extrude and melt to form a melt;

[0100] Among them, the length-diameter ratio of the screw of the single-screw extruder is 40, and the depth of the screw groove is 20mm. , 228℃;

[0101] (3) the polylactic acid melt is sent into the spinning box through the melt conveying pipe for spinning to form melt filaments;

[0102] Among them, the spinning temperature is 230°C, the tube length of each melt...

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Abstract

The invention provides a hollow three-dimensional curled polylactic acid short fiber and a preparation method and device system thereof. The preparation method comprises the following steps: sequentially drying polylactic acid slices, extruding and melting by a single screw extruder, spinning by a spinning manifold, cooling and forming, and oiling, wherein the length-diameter ratio of a screw of the single-screw extruder is greater than 27, and the depth of a screw groove is 11.2-35.5 mm; the post-spinning step comprises the following steps: sequentially carrying out bundling, oil immersion, oil bath drafting, steam water bath drafting, tension heat setting, cooling spraying, fiber stacking, steam preheating, three-dimensional crimping, silicone oil spraying, traction cutting and relaxation heat setting on the oiled nascent fiber to obtain the hollow three-dimensional crimped polylactic acid short fiber. According to the device system and the preparation method provided by the invention, the spinnability of the polylactic acid is effectively improved, the hollow three-dimensional crimped polylactic acid short fibers can be continuously produced, the fiber shaping effect is good, and the three-dimensional crimp forming effect is good.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid spinning, and in particular relates to a hollow three-dimensional crimped polylactic acid short fiber, a preparation method and a device system thereof. Background technique [0002] Green textiles and biodegradable materials have become the focus of attention all over the world. As a biodegradable polymer, polylactic acid (PLA) is widely used in medical, medical, agricultural, packaging, clothing and other fields to replace traditional materials. PLA is also a low-energy product, 30-50% less energy-intensive than polymers produced from alternative petroleum products. Before the exhaustion period of non-renewable oil resources, the market price of oil and its derivatives will skyrocket, and renewable products will surely become a global tension consumer goods. [0003] Polylactic acid fiber combines the excellent properties of natural fibers and synthetic fibers, and is a new type of eco...

Claims

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Application Information

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IPC IPC(8): D01D5/24D01D5/22D01D5/26D01D5/092D01D5/098D01D10/02D01F6/62
CPCD01D5/24D01D5/22D01D5/26D01D5/092D01D5/098D01D10/02D01F6/625Y02P70/62
Inventor 陈中碧杨阳操乐发朱厚续范亚庆何玉春
Owner 安徽丰原生物纤维股份有限公司
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