Ultrawhite ultrahigh-molecular weight ultrahigh-modulus polyethylene fibers and preparation process thereof

A polyethylene fiber, high-strength and high-modulus technology, applied in the direction of spinning solution preparation, single-component polyolefin artificial filament, adding dyes in spinning solution, etc., can solve the problem of wool and broken ends, relative impurities, pigments, etc. Easy to be precipitated and other problems, to achieve the effect of simple manufacturing method, low production cost and bright color

Active Publication Date: 2011-02-02
长青藤高性能纤维材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this invention prepares colored high-strength polyethylene fibers, there are two defects: one is that due to the relatively high proportion of added pigments, there are relatively many impurities, which affect the normal spinning conditions of spinning and drafting of high-strength and high-modulus polyethylene fibers. It is easy to cause wool and broken ends, and the physical properties such as strength and modulus of the finished fiber are reduced; second, when the pigment mentioned in the invention is added at a ratio of 1.0 to 3.0%, the pigment is easily precipitated during the extraction process of the fiber. Causes fiber color stability to be difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Product: Slightly increased white ultra-high molecular weight polyethylene fiber

[0030] Process steps:

[0031] (1) Preparation of spinning dope

[0032] A. Heat the quantitative white oil to 50°C, add ultra-high molecular weight polyethylene in a ratio of 1:10, fully disperse and emulsify in a high-speed emulsifier, and form a mixture of ultra-high molecular weight polyethylene and white oil.

[0033] Put the stilbene bisbenzimidazole compound additive of 0.01% of the weight of ultra-high molecular weight polyethylene into it, and fully emulsify it again in the high-speed emulsifier.

[0034] B. Put the mixed material in the reactor for heating and stirring to prepare the swelling material. The temperature in the reactor is 115°C, and the heating time is 2 hours.

[0035] (2) Jelly spinning

[0036] The prepared spinning stock solution is transported to the twin-screw spinning machine, and after extrusion, melting and stirring, the temperature of the swelling mate...

Embodiment 2

[0046] Product: Medium White UHMWPE Fiber

[0047] Process steps:

[0048] (1) Preparation of spinning stock solution A. Heat quantitative white oil at 53°C, add ultra-high molecular weight polyethylene in a ratio of 1:10, fully disperse and emulsify in a high-speed emulsifier to form ultra-high molecular weight polyethylene and white oil mixture.

[0049] Add the stilbene bisbenzimidazole compound additive of 0.015% of the weight of ultra-high molecular weight polyethylene, and fully emulsify in the high-speed emulsifier again.

[0050] B. Put the mixed material in the reactor for heating and stirring to prepare the swelling material. The temperature in the reactor is 118°C, and the heating time is 2.5 hours.

[0051] (2) Jelly spinning

[0052] The prepared spinning stock solution is transported to the twin-screw spinning machine, and after extrusion, melting and stirring, the temperature of the swelling material is controlled at 275°C, and a plurality of viscous fluid fi...

Embodiment 3

[0062] Product: Super White UHMWPE Fiber

[0063] Process steps:

[0064] (1) Preparation of spinning dope

[0065] A. Heat quantitative white oil to 55°C, add ultra-high molecular weight polyethylene in a ratio of 1:10, fully disperse and emulsify in a high-speed emulsifier, and form a mixture of ultra-high molecular weight polyethylene and white oil.

[0066] Add 0.02% stilbene bisbenzimidazole compound additives weighed by ultra-high molecular weight polyethylene, and fully emulsify in a high-speed emulsifier again.

[0067] B. Put the mixed material in the reactor for heating and stirring to prepare the swelling material. The temperature in the reactor is 120°C, and the heating time is 2.5 hours.

[0068] (2) Jelly spinning

[0069] The prepared spinning stock solution is transported to the twin-screw spinning machine, and after extrusion, melting, and stirring, the temperature of the swelling material is controlled at 278°C, and a plurality of viscous fluid filaments a...

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Abstract

The invention relates to ultrahigh-molecular weight ultrahigh-modulus polyethylene fibers and a manufacturing method thereof, in particular to ultrawhite ultrahigh-molecular weight ultrahigh-modulus polyethylene fibers and a preparation process thereof, which are applicable in fields of various protective textiles with an ultrawhite color requirement. In the invention, ultrahigh-molecular weight polyethylene is used as a raw material and is mixed with white oil to form a mixture, a diphenylethyl dibenzimidazole compound is added into the mixture as an additive to form spinning solution, and the ultrahigh-molecular weight ultrahigh-modulus polyethylene fibers are obtained by a spinning process, wherein the amount of the additive is 0.01 to 0.05 percent based on the weight of the ultrahigh-molecular weight polyethylene. The preparation process comprises the following steps: preparing the spinning solution; performing gel spinning; balancing semi-finished product gel spinning; extracting; displacing; drying; and hot high drafting. The fibers are ultrawhite and brighter and can meet requirement for differentiation; meanwhile, the biological indexes such as strength and modulus of the finished fibers are not affected, the manufacturing method is simple, and the production cost is low.

Description

technical field [0001] The invention relates to a high-strength and high-modulus polyethylene fiber and a manufacturing method thereof, in particular to an extra-white high-strength and high-modulus polyethylene fiber and a manufacturing method thereof, which are suitable for various protective fabric fields requiring extra-white color. Background technique [0002] The high-strength and high-modulus polyethylene fiber in the current technology is known as the three high-performance fibers in the world today, along with carbon fiber and aramid fiber, and is the fiber with the highest strength and modulus in the world. High-strength and high-modulus polyethylene fibers are made of ultra-high molecular weight polyethylene. After gel spinning and super-stretching, the polyethylene macromolecules that were originally intertwined and arranged in disorder are gradually unwound to achieve extremely high orientation and crystallinity. get. Therefore, the fiber has excellent propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/12D01D1/02D01D10/02D01F1/06D01D5/06D01F6/46
Inventor 包剑峰
Owner 长青藤高性能纤维材料有限公司
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