High-strength, flame-retardant and high-temperature-resistant polyimide yarn and manufacturing method thereof

• Main Authors: NIU HONGQING, ZENG YONGYAO, HAN ENLIN, WU DEZHEN
• Format: Patent
• Language: Chinese; English
• Published: 24.09.2019
• Subjects: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS; MECHANICAL FINISHING OF YARNS OR ROPES; TEXTILES; WARPING OR BEAMING; YARNS; YARNS OR THREADS

Disclosed are a high-strength, flame-retardant and high-temperature-resistant polyimide yarn and a manufacturing method thereof. The manufacturing method includes the following steps: (a) pre-treating polyimide chopped mixed fibers; (b) carrying out opening and picking, carding, drawing and roving; (c) directly preparing rove into a spun yarn, or twisting and winding the spun yarn and a fine-denier high-strength high-modulus polyimide fiber at a front jaw of a spinning frame into a core spun yarn; (d) sizing the prepared polyimide yarn for post-treatment. The prepared polyimide yarn has low hairiness, excellent mechanical properties and high flame retardancy, and the temperature can exceed 350 DEG C after long-term use. 一种高强阻燃耐高温型聚酰亚胺纱线及其制备方法，包括以下步骤：(a)聚酰亚胺短切混合纤维前预处理；(b)开清棉-梳棉-并条-粗纱；(c)粗纱直接制备细纱或细纱与细旦高强高模聚酰亚胺纤维在细纱机前钳口加捻卷绕制备成包芯纱；(d)制备的聚酰亚胺纱线进行上浆后处理。制备出的聚酰亚胺纱线毛羽量少，力学性能优异，阻燃性能极佳，长期使用温度可以达到350℃以上。