Preparation method of polyvinyl alcohol fiber and heat-humidity comfortable polyvinyl alcohol fiber fabric
A technology of polyvinyl alcohol fiber and polyvinyl alcohol, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, chemical post-treatment of synthetic polymer rayon, etc., can solve the problem of reduced wearing comfort and fabric porosity Reduce problems such as high design requirements, achieve excellent mechanical properties, improve intelligence, and good compatibility
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[0038] In order to achieve the above object, the present invention also provides a method for preparing polyvinyl alcohol fibers with heat and humidity comfort, comprising the following steps:
[0039] S1. Preparation of spinning solution containing polyethylene: dissolving polyvinyl alcohol with a degree of alcoholysis of 98.5% to 100% and a molecular weight of 70,000 to 85,000 g / mol in water to obtain polyvinyl alcohol with a mass fraction of 12% to 20% spinning solution;
[0040] S2. The polyvinyl alcohol spinning solution obtained in step S1 is subjected to wet spinning, and stretched and cross-linked in an aqueous solution of sodium sulfate to obtain the heat-moisture comfortable polyvinyl alcohol fiber.
[0041] In step S2, the extrusion speed of the wet spinning is 1-80 m / min, and the drawing speed is 1-500 m / min.
[0042] In step S1, color-changing silica gel with a porous structure is further added to the polyvinyl alcohol spinning solution, and the amount of the col...
Embodiment 1
[0045] A polyvinyl alcohol fiber with heat and humidity comfort, prepared by the following method:
[0046] S1. Preparation of a spinning solution containing polyethylene: dissolving polyvinyl alcohol with a degree of alcoholysis of 99% and a molecular weight of 75,000 in water to obtain a spinning solution of polyvinyl alcohol with a mass fraction of 16%;
[0047] S2. The polyvinyl alcohol spinning solution obtained in step S1 is wet-spun, the extrusion speed is 30m / min, the drawing speed is 200m / min, and it is drawn and cross-linked in an aqueous sodium sulfate solution to obtain the obtained polyvinyl alcohol spinning solution. The heat and humidity comfort polyvinyl alcohol fiber.
[0048] The prepared heat-moisture comfort polyvinyl alcohol fibers were woven into knitted fabrics.
[0049] see figure 1 and 2 Shown is the topography of the heat-humid comfort polyvinyl alcohol fiber prepared in this example. It can be seen that due to the characteristics of the polyvinyl...
Embodiment 2
[0051] A polyvinyl alcohol fiber with heat and humidity comfort, prepared by the following method:
[0052] S1. polyvinyl alcohol and color-changing silica gel (particle diameter is 800nm) are dissolved in solvent, obtain spinning solution; The mass content of polyvinyl alcohol is 15% in the described spinning solution, and the addition amount of color-changing silica gel is polyvinyl alcohol 20wt% of;
[0053] S2. The spinning solution obtained in step S1 is wet-spun to obtain a moisture-sensitive color-changing hydrophilic fiber with a circular cross section.
[0054] The extrusion speed of the wet spinning is 30m / min, and the drawing speed is 200m / min; the coagulation bath of the wet spinning is an aqueous solution of sodium sulfate.
[0055] The prepared moisture-sensitive color-changing heat-moisture comfort polyvinyl alcohol fibers were woven into knitted fabrics.
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Abstract
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