Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 171-175.doi: 10.13475/j.fzxb.20210407506

• Dyeing and Finshing & Chemicals • Previous Articles     Next Articles

Sulfanilamide finishing to polyamide 6 fabrics for flame retardant and anti-dripping performance

JIN Wenjie, CHENG Xianwei, GUAN Jinping(), CHEN Guoqiang   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215021, China
    2. National Engineering Laboratory for Modern Silk, Suzhou, Jiangsu 215021, China
  • Received:2021-04-28 Revised:2021-11-24 Online:2022-02-15 Published:2022-03-15
  • Contact: GUAN Jinping E-mail:guanjinping@suda.edu.cn

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Abstract:

In order to further expand the application field of polyamide 6(PA6) fabric, sulfanilamide was used as flame retardant agent to finish polyamide 6 fabrics by impregnation deposition at high temperature. The thermal stability, heat release ability, melt dripping performance, flame retardant property and mechanism of the treated PA6 fabric were investigated. The results showed that the treated PA6 fabric had a high LOI value of 32.2%, and the damaged length and area were reduced without dripping phenomenon, suggesting that the treated PA6 fabric reached the B1 classification with good flame retardant performance. Meanwhile, the peak heat release rate of the treated PA6 fabric decreased by 16.9%, indicating significant decrease of fire hazard. It was suggested that sulfanilamide improved the flame retardancy of PA6 fabric mainly through the gas-phase mechanism. The flame retardant treatment exerted little influence on the tensile strength and handle of the treated PA6 fabric.

Key words: polyamide fabric, sulfanilamide, flame retardant modification, anti-dripping, gas-phase mechanism

CLC Number: 

  • TQ342.21

Fig.1

FT-IR spectra of PA6 fabrics"

Fig.2

Surface morphology images of PA6 fiber. (a) Untreated PA6 fabrics; (b) FR-PA6 fabrics"

Fig.3

TG curves of modified PA6 fabrics under air (a) and nitrogen (b)"

Tab.1

Combustion parameters of polyamide fabric"

试样 质量增
加率/%		 LOI值/
%		 损毁长
度/cm		 熔滴
数量		 是否点燃
脱脂棉
聚酰胺6 — 22.8 18.0 2~3 是
阻燃聚酰胺6 2.49 32.2 11.0 0 否

Fig.4

Photographs of PA6 fabrics after vertical burning test"

Fig.5

Heat release curve of PA6 fabrics"

Tab.2

Heat release parameters of PA6 fiber"

试样 HRC/
(J·g-1·k-1)		 pHRR/
(W·g-1)		 THR/
(kJ·g-1)		 残炭
量/%
聚酰胺6 614 588.7 30.7 0
阻燃聚酰胺6 500 489.2 29.2 0

Fig.6

Surface morphology of char residue of PA6 fabric. (a) PA6 fabric; (b) Flame retardent of PA6 fabric"

Tab.3

Mechanical properties of PA6 fabrics"

样品 断裂强
力/N		 断裂伸
长率/%		 抗弯刚度/
(N·m-1)
聚酰胺6 1 573.3 35.1 31.7
阻燃聚酰胺6 1 434.4 31.8 40.7
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