Polylactic acid-melt-spun spandex copolymer easy-to-dye fiber and preparation method thereof
By introducing melt-spun spandex fibers into polylactic fibers to form block copolymers, the problem of polylactic fibers being difficult to color during low-temperature dyeing and hydrolyzing and breaking of fibers during high-temperature dyeing is solved, and efficient dyeing effect is achieved.
CN119685968APending Publication Date: 2025-03-25HEBEI BANGTAI SPANDEX TECH CO LTD +1
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Patent Information
- Application Number
- CN202411856853.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
Polylactic fibers are not easy to color when dyeing at low temperatures, and problems such as hydrolysis and fiber breakage will occur during high temperatures. The existing modification methods cannot fundamentally solve the problem of being difficult to color.
Method used
The polylactic acid is structurally modified by melt-spun spandex fiber, and the polyether polyol and aromatic diisocyanate are introduced to form block copolymers to enhance the dyeability of the fibers.
Benefits of technology
It significantly improves the dyeability of polylactic fiber, solves the problem of not easy coloring during low-temperature dyeing, and avoids the problems of hydrolysis and fiber breakage during high-temperature dyeing.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a polylactic acid-melt spinning spandex copolymerized easy-to-dye fiber and a preparation method thereof, and belongs to the technical field of high polymer materials, the fiber comprises the following raw materials by weight: 60-77% of polylactic acid, 10-25% of polyether polyol, 5-17% of aromatic diisocyanate, 1-8% of a micromolecule chain extender, 1-3% of an anti-hydrolysis agent and 1-1.5% of an auxiliary agent; wherein the polyether polyol is tetrahydrofuran-propylene oxide copolyether glycol and / or tetrahydrofuran-ethylene oxide copolyether glycol, and the polyether polyol is a mixture of tetrahydrofuran and propylene oxide copolyether glycol; according to the present invention, the polylactic acid has the molecular weight of 1000-4000, the main body material is subjected to primary polymerization at first, and then is continuously blended in the synthesis stage, and the reaction group is subjected to complete reaction grafting to form the homogeneous and stable copolymer fiber, such that the excellent dyeing effect is provided, and the problem that the polylactic acid is not easily colored can be fundamentally improved;
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