Spinning swelling solution used for preparation of ultra-high molecular weight colored polyethylene fiber and spinning stock solution

Abstract

The invention discloses a spinning swelling solution used for preparation of an ultra-high molecular weight colored polyethylene fiber. The spinning swelling solution comprises, by weight: 10-50% of ultra-high molecular weight polyethylene; a staining solution accounting for 0.01-10% of the weight of the ultra-high molecular weight polyethylene; and spinning solvents. In the invention, first, the staining solution is prepared into a swelling solution, in which the staining solution can be uniformly dispersed. Preparation of the staining solution into a spinning stock solution can be beneficial to uniform dispersion of the staining solution in the spinning stock solution. When using the spinning stock solution for gel spinning, after the spinning stock solution undergoes melting, dispersion, uniform mixing and unwrapping in a twin-screw extruder, the pigment particles in the staining solution can induce crystallization as a nucleating agent and form microcrystals. Extrusion molding of a crystal nucleus-containing spinning melt is in favor of obtaining nascent filaments characterized by low crystallinity and uniform crystal nucleus distribution. Thus, mechanical properties of the ultra-high molecular weight polyethylene fiber can be improved finally.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene fiber, in particular to a spinning swelling solution and a spinning stock solution for preparing ultra-high molecular weight polyethylene colored fiber. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber, also known as high-strength and high-modulus polyethylene fiber, refers to a high-performance fiber made of polyethylene with a relative molecular weight of more than 1 million through spinning-extraction-drying-super-stretching. Fiber-reinforced composite materials made of ultra-high molecular weight polyethylene fibers have the advantages of light weight, impact resistance, and high dielectric properties, and are widely used in aerospace, sea defense, weaponry, and daily industry. [0003] In the prior art, the preparation of ultra-high molecular weight polyethylene fibers usually uses gel spinning technology, which was first invented by DSM compa...

AI Technical Summary

Problems solved by technology

In the above-mentioned patents, inorganic pigments with large particle sizes are used, which are difficult to disperse uniformly in the spinning solution, so it is difficult to form uniform crystal nuclei and perfect crystallization in the spinning process, resulting in finished fibers having color, but mechanical properties Poor, only reaching 15-30g / d strength and 400-1000g / d modulus

Images