Method for post-treating ultra-high molecular weight polyethylene fiber
A polyethylene fiber, ultra-high molecular weight technology, applied in the direction of fiber processing, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problems of reduced tensile stability and reduced tensile effectiveness of frozen collagen fibers
Inactive Publication Date: 2011-03-30
杨珍芬
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Problems solved by technology
Because the jelly silk contains a large amount of solvent, when stretching, the plasticization of the solvent will cause the macromolecular chain to slip, which will reduce the effectiveness of stretching; and due to the presence of the solvent, the stretching of the jelly silk will The ratio is greatly affected by the amount of solvent content, resulting in a decrease in the tensile stability of the jelly collagen filaments, so the solvent in the precursor filaments needs to be removed before ultra-thermal stretching
Method used
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Embodiment 1
[0046] see figure 1 and figure 2 , figure 1 It is a flow chart of the post-treatment method for ultra-high molecular weight polyethylene fibers in this embodiment, figure 2 It is a schematic diagram of the post-treatment method of ultra-high molecular weight polyethylene fiber in this embodiment.
[0047] The dried ultra-high molecular weight polyethylene jelly collagen filaments are sequentially fed into the guide wire roller machine 101, the first hot tunnel 102, the first drafting machine 103, the second hot tunnel 104, the second drafting machine 105, and the third heating tunnel. Corridor 106, the third drafting machine 106.
[0048] S101, applying a first-stage positive draft with a draft ratio of 5.8 times to the jelly collagen filament by the first drafting machine;
[0049] S102, applying a second-stage positive draft with a draft ratio of 6.8 times to the jelly collagen filament by the second drafting machine;
[0050] S103, applying a negative draft of 0.95 t...
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Abstract
The invention provides a method for post-treating ultra-high molecular weight polyethylene fiber, which comprises the steps of: a) imposing 5 to 60 times of drawing on dried ultra-high molecular weight polyethylene gel protofilaments at a temperature of between 70 and 160 DEG C to obtain the ultra-high molecular weight polyethylene fiber; and b) imposing the negative stretch with the drawing ratio less than 1 time on the ultra-high molecular weight polyethylene fiber at a temperature of between 100 and 160 DEG C. After the ultra-high molecular weight polyethylene fiber is subjected to ultra-thermal stretch, the fiber has ultra-tensile deformation, and the inside of the fiber can produce internal stress, so the method, by making the fiber perform certain thermal contraction, can effectively release the internal stress of the fiber, and improve the mechanical properties of the ultra-high molecular weight polyethylene fiber.
Description
technical field [0001] The invention relates to a post-treatment method for fibers, in particular to a post-treatment method for ultra-high molecular weight polyethylene fibers. Background technique [0002] Ultra-high molecular weight polyethylene fiber is also called high-strength, high-modulus polyethylene (UHMWPE) fiber or extended chain polyethylene (ECPE) fiber, which refers to a relative molecular mass of (1~7)×10 6 Polyethylene, an ultra-high molecular weight polyethylene fiber made after spinning and super-stretching. It is the third generation of high-performance fiber after carbon fiber and aramid fiber. [0003] Compared with other fiber-reinforced composite materials, ultra-high molecular weight polyethylene fiber-reinforced composite materials have the advantages of light weight, impact resistance, and high dielectric properties, and play a pivotal role in aerospace, sea defense, weaponry and other fields. At the same time, the fiber also has broad applicatio...
Claims
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IPC IPC(8): D01D5/04D01D5/12D01D5/00D01F6/14
Inventor 周成程
Owner 杨珍芬