Production method of ultrahigh molecular weight polyethylene fiber

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin rayon, fiber processing, spinning solution preparation, etc. The macromolecular chain is prone to breakage and other problems

Inactive Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the dissolution and unwrapping process is carried out under high temperature and high shear conditions, its macromolecular chains are prone to breakage during the dissolution process, resulting in the degradation of ultra-high molecular weight polyethylene molecules, resulting in the performance of ultra-high molecular weight polyethylene fibers. In addition, the dissolution process of UHMWPE in a solvent is extremely slow: UHMWPE macromolecular chains are very long and difficult to move, the force between

Method used

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  • Production method of ultrahigh molecular weight polyethylene fiber
  • Production method of ultrahigh molecular weight polyethylene fiber
  • Production method of ultrahigh molecular weight polyethylene fiber

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Embodiment

[0024] In order to further understand the present invention, the preferred embodiments of the present invention will be described below in conjunction with the examples and accompanying drawings, and the advantages of the present invention will be highlighted by comparison.

[0025] Embodiment: the technical process of this embodiment is attached figure 1 , the main steps are:

[0026] 1. The ultra-high molecular weight polyethylene is swollen and dissolved by a solvent to make a spinning jelly solution, and then extruded through a spinneret to obtain a thin stream of the solution. The solvent used is trans-decalin, and the trans-decalin solvent and ultra-high molecular weight polyethylene are mixed according to the ratio of 20:1~5:1, and swelled at 90°C~100°C for 2~4 hours, and then Cool the swollen ultra-high molecular weight polyethylene suspension to room temperature and feed it into the twin-screw extruder. The inlet temperature of the twin-screw is 85°C~95°C, the middle...

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Abstract

The invention discloses a production method of an excellent solvent of ultrahigh molecular weight polyethylene and a fiber thereof. The production method is characterized in that the ultrahigh molecular weight polyethylene can be dissolved in the solvent at a temperature being lower than a decomposition temperature of the ultrahigh molecular weight polyethylene to form a homogeneous solution, thereby reducing a macromolecule degradation degree in a dissolving and untwisting process of the ultrahigh molecular weight polyethylene and meanwhile increasing homogeneity of a formed jelly solution to ensure homogeneity and spinnability of primary precursor fibers during a production process of an ultrahigh molecular weight polyethylene fiber. Compared with other spinning solvents and spinning methods, the production method and the solvent in the invention can enable a solvent mass content in the primary precursor fibers to be not more than 2%, breaking strength of the ultrahigh molecular weight polyethylene fiber to be increased by 7-11% and a breaking modulus to be increased by 17-42%.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to an excellent solvent for ultra-high molecular weight polyethylene and a production method for fibers thereof. Background technique [0002] Ultra-high molecular weight polyethylene fiber is a synthetic fiber with high strength and high modulus produced by ultra-high molecular weight polyethylene with a molecular weight of more than 1 million. At present, ultra-high molecular weight polyethylene, carbon fiber and aramid fiber are collectively referred to as three high-performance fiber materials in the world. Among them, ultra-high molecular weight polyethylene fiber has high strength, high modulus, light weight, light resistance, and high wear resistance. It plays an extremely important role in national defense, military industry, and aerospace, and it has also been more and more widely used in civilian fields. [0003] In 1979, the Netherlands DSM company first applied ...

Claims

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Application Information

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IPC IPC(8): D01F6/04D01D1/02D01D5/088
Inventor 景强孔凡敏苏豪张叶徐莉
Owner CHINA PETROLEUM & CHEM CORP
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