A kind of halogen-free flame-retardant ultra-smoke-suppressing fiber and its preparation method
A fiber and polymer technology, applied in the direction of flame-retardant fiber, plant fiber, fiber treatment, etc., can solve the problems of hindering the fiber formation of materials, the lack of spinnability of inorganic particles, and the failure to effectively guarantee the safety of life, etc., to achieve long-term The effect of service life, excellent spinnability, excellent flame retardancy and smoke suppression effect
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[0026] The invention provides a halogen-free flame-retardant super-smoke-suppressing fiber and a preparation method thereof, specifically comprising the following steps:
[0027] 1) Preparation of spinning solution: Soak polymer raw materials with different mass fractions in water overnight to weaken the possible hydrogen bond interaction, add cyclodextrins with different mass fractions, and mechanically spin them under heating conditions (50-95°C). Stir to dissolve, and stand for 10 minutes to defoam to obtain spinning solution. In the spinning solution, the mass concentration of the polymer is 13%-40%, and the mass concentration of the cyclodextrin is 10%-40%.
[0028] Wherein the polymer is a natural or synthetic polymer material rich in hydroxyl or amino groups and soluble in aqueous solution, including but not limited to polyvinyl alcohol, cellulose, chitosan and the like.
[0029] Cyclodextrin is β-cyclodextrin and derivatives thereof, preferably β-cyclodextrin.
[003...
Embodiment 1
[0041] 1) Preparation of spinning solution: add polyvinyl alcohol 1799 raw material relative to its mass fraction of 15% in water, soak in water overnight to weaken the hydrogen bond interaction, add β-cyclodextrin with a relative water mass fraction of 15% Dissolve under mechanical stirring at 80°C, and stand for 10 minutes to defoam to obtain spinning solution;
[0042] 2) Preparation of primary fiber: Extrude the prepared spinning solution through the spinneret of the wet spinning machine, enter it into the coagulation bath of saturated ammonium sulfate solution for coagulation and initial 2-fold stretching, and finally collect it through the winding device primary fiber;
[0043]3) Thermal stretching: the obtained nascent fiber is stretched in two stages, and the total stretch ratio of the two stages of stretching is 1:5;
[0044] 4) Heat setting: the heat-stretched fiber is sent to the heat setting room, the heat setting temperature is 220°C, and the heat setting time is...
Embodiment 2
[0051] 1) Preparation of spinning solution: add polyvinyl alcohol 1788 raw material relative to its mass fraction of 13% in water, soak in water overnight to weaken the hydrogen bond interaction, add β-hydroxypropyl ring with a relative water mass fraction of 9.5% Dextrin was dissolved by mechanical stirring at 90°C, and left to defoam for 10 minutes to obtain spinning solution;
[0052] 2) Preparation of primary fiber: Extrude the prepared spinning solution through the spinneret of the wet spinning machine, enter it into the coagulation bath of saturated ammonium sulfate solution for coagulation and initial 2-fold stretching, and finally collect it through the winding device primary fiber;
[0053] 3) Thermal stretching: the obtained nascent fiber is stretched in two stages, and the total stretching ratio of the two stages of stretching is 1:1;
[0054] 4) Heat setting: the heat-stretched fiber is sent to the heat setting room, the heat setting temperature is 180°C, and the ...
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Abstract
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