Spinning process for preparing regenerated polyester long fibers from waste fiber products

A technology for regenerating polyester and waste fibers, applied in the direction of cellulose/protein conjugated rayon filament, conjugated synthetic polymer rayon filament, fiber chemical characteristics, etc., can solve problems such as lack of technology, achieve efficient removal, good Hygroscopic effect

Pending Publication Date: 2021-10-29
ANHUI DONGJIN RESOURCE REGENERATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a spinning process for preparing regenerated polyester filaments from waste fiber products, which is used to solve the lack of a process for regenerating polyester filaments from waste fiber products in the prior art, and it is impossible to make regenerated polyester filaments both Technical issues of good hygroscopicity, acid and alkali resistance, heat resistance and antistatic property

Method used

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  • Spinning process for preparing regenerated polyester long fibers from waste fiber products
  • Spinning process for preparing regenerated polyester long fibers from waste fiber products
  • Spinning process for preparing regenerated polyester long fibers from waste fiber products

Examples

Experimental program
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Effect test

Embodiment 1

[0035] like figure 1 As shown, this embodiment provides a spinning process for preparing recycled polyester long fibers from waste fiber products, including the following steps:

[0036] S1. Pretreatment of waste polyester fiber products: Select waste polyester fiber products, and obtain recycled polyester fiber coarse material through pulverization, pickling, primary filtration, ultrasonic cleaning, secondary filtration, and drying, and the recycled polyester fiber coarse material is melted. Regenerated polyester fiber raw materials are obtained by extrusion; waste polyester fiber products are selected from waste polyester fabrics and waste polyester bottles, and the intrinsic viscosity of waste polyester fabrics is 0.55-0.65dl / g, impurity content ≥ 220mg / kg, moisture content ≥2%; the intrinsic viscosity of the waste polyester bottle is 0.72~0.82dl / g, the impurity content is ≥80mg / kg, and the moisture content is ≥1.5%.

[0037] S2. Pretreatment of waste cotton fiber products...

Embodiment 2

[0041] like figure 1 As shown, the spinning process for preparing regenerated polyester long fibers from waste fiber products provided in this example is different from Example 1 in that the chain extender in step S3 is selected from ethylene glycol; the raw materials of regenerated polyester fibers and regenerated cotton fibers The mass ratio of raw material, chain extender, cetyl phosphate salt, and polyethylene glycol is 1.9:0.6:0.8:0.03:0.25; the multiple of wet-heat drafting is 2.5; the washing and drying use clean water, and the washing temperature is 44 °C, and the drying temperature is 122 °C.

Embodiment 3

[0043] like figure 1 As shown, the spinning process for preparing regenerated polyester long fiber from waste fiber products provided in this example is different from Example 1 in that the chain extender in step S3 is selected from neopentyl glycol; the raw materials of regenerated polyester fibers and regenerated cotton The mass ratio of fiber raw material, chain extender, cetyl phosphate salt, and polyethylene glycol is 2:0.6:0.78:0.025:0.18; the multiple of wet-heat drafting is 2.4; clean water is used for washing and drying, and the washing temperature is 47°C, and the drying temperature is 118°C.

[0044] Performance Testing

[0045] The performance test of the regenerated polyester long fibers prepared in Examples 1-3 shows that the volume resistivity reaches 1.8-2.2×10 8 Ω.cm, the moisture regain reaches 1.28~1.39% under the relative humidity of 60%, the breaking strength reaches 5.63~5.82cN / dtex, and the antistatic property, hygroscopicity and breaking strength are ...

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Abstract

The invention discloses a spinning process for preparing regenerated polyester long fibers from waste fiber products, and relates to the technical field of waste fiber regeneration. According to the spinning process, waste polyester fiber products are selected and pretreated to obtain regenerated polyester fiber raw materials, and waste cotton fiber products are selected and pretreated to obtain regenerated cotton fiber raw materials; the regenerated polyester fiber raw materials, the regenerated cotton fiber raw materials, a chain extender, hexadecyl phosphate salt and polyethylene glycol are mixed and then heated and melted to obtain regenerated mixed polyester chips, and spinning and after-finishing of the regenerated mixed polyester chips are conducted to obtain regenerated polyester long fibers. According to the spinning process, waste is utilized, the polyester fiber and the cotton fiber are subjected to chain extension to form a macromolecular network structure through the chain extension effect of the chain extender in cooperation with the good moisture absorption performance of the polyethylene glycol and the excellent antistatic property of the hexadecyl phosphate salt, and the regenerated polyester long fiber has the good moisture absorption performance, acid and alkali resistance, heat resistance and antistatic property, so that the spinning recycling prospect of the waste fiber products is improved.

Description

technical field [0001] The invention relates to the technical field of waste fiber regeneration, in particular to a spinning process for preparing regenerated polyester filaments from waste fiber products. Background technique [0002] At present, there are three main ways to recycle polyester waste textiles: physical method, chemical method and physical and chemical mixed method. Among them, the liquid-phase viscosification method used in the physical-chemical mixing method has received widespread attention due to its short process flow and low energy consumption. Polyester bottle flakes can be directly melt-spun due to their high intrinsic viscosity, but polyester waste textiles cannot be directly melt-spun for reuse due to their low intrinsic viscosity, and the sources are complex, with large differences in color and intrinsic viscosity. Reuse poses great difficulties. [0003] In the existing technology, polyester waste textiles are used as raw materials, and optimized...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/02D01F1/10D01F1/09
CPCD01F8/14D01F8/02D01F1/10D01F1/09
Inventor 施文东祝建勋邢朝东
Owner ANHUI DONGJIN RESOURCE REGENERATION SCI & TECH
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