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Polyimide deep dyeing method for fabric

A technology of polyimide and dyeing method, which is applied in the field of fabric dyeing, and can solve the problems of polyimide fiber physical properties, chemical property damage, fiber excellent performance damage, and inability to weave into fabrics, etc.

Pending Publication Date: 2022-03-11
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyimide molecule is composed of a large number of imide benzene rings and five-membered ring structures and other structures. The five-membered ring is relatively stable, but the structure of the benzene ring is easily destroyed during the decolorization process, so As a result, many physical and chemical properties of polyimide fibers are damaged to varying degrees, and many excellent properties of the fibers are damaged to varying degrees, so that even if the dye can successfully dye polyimide fabrics, eventually It is not worth the loss, it cannot be woven into a fabric with good performance, and it cannot be well applied in the industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Polyimide deep dyeing method for fabric
  • Polyimide deep dyeing method for fabric
  • Polyimide deep dyeing method for fabric

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Embodiment 1

[0031] As a high-performance material, polyimide has high modulus, excellent flame and corrosion resistance and other properties. At present, it is mainly used in aviation, safety protection, rail transit and other fields, and can be made into high-temperature resistant filter materials and protective materials, such as fire-fighting clothing and bullet-proof clothing. However, the high crystallinity and golden yellow color of PI itself make it difficult for dyes to enter the interior of PI molecules and cover its natural color, which poses a huge challenge to its dyeability and limits its potential use. Therefore, if the color of polyimide fabric can be further promoted, the excellent performance of this material will make it develop rapidly in various industries.

[0032] The dyeing and coverage of polyimide fibers has always been a big problem. Therefore, in order to make the dyeing effect of polyimide fibers meet the requirements of the majority of consumers, this project ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a polyimide deep dyeing method of a fabric, which comprises the following steps of: performing ultrasonic rinsing and drying on a polyimide fabric in an ethanol solution, and then treating the polyimide fabric by using NaOH; the method comprises the following steps: dyeing a fabric in an alkaline brilliant blue dye concentration of 3-5% by using a carrier of 2-75ml / L for 60 minutes, adding a dispersing agent NNO of 0.2-1g / L and ammonium dihydrogen phosphate of 0.5-2g / L, controlling the pH value to be 4-6, dyeing at high temperature and high pressure, keeping the temperature, cooling and washing, reducing and washing, and drying.

Description

technical field [0001] The invention belongs to the technical field of fabric dyeing, in particular to a polyimide deep dyeing method for fabrics. Background technique [0002] Polyimide is a high-performance material with an imide structure, which can be divided into pseudo-thermoplastic, thermoplastic and thermosetting. It is a high-performance material with a great use space. At the beginning of the last century, polyimide was born, and then in the 1960s and 1970s, for polyimide fibers, polyimide was usually prepared by a two-step method, such as DuPont, but because of the initial development level and Due to various difficulties in the development and preparation of its fibers, polyimide has not been industrialized, but only developed in scientific research laboratories, and the modulus and strength of the produced polyimide fibers are not large. [0003] Polyimide (PI) fiber molecules are mainly composed of imide rings, etc., and the oxygen-carbon double bonds in the r...

Claims

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Application Information

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IPC IPC(8): D06P1/41D06P1/649D06P1/651D06P1/673D06P3/02
CPCD06P1/41D06P3/022D06P1/6495D06P1/65118D06P1/6735D06P1/67366
Inventor 韩广钟金阳王丽丽
Owner YANCHENG INST OF TECH
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