Melt spinning method using X-ray for online synchronous detection

Abstract

The invention discloses a melt spinning method using X-ray for online synchronous detection. The method using the X-ray for online synchronous detection can be realized through a melt spinning machine. The melt spinning machine using the X-ray for online synchronous detection comprises a polymer melting device, a lifting platform, a spinning assembly, an X-ray device, a thread guide mechanism and a winding mechanism. The X-ray is emitted to cooling fiber tows in a spinning channel, X-ray scattering diagrams are acquired, and accordingly microstructure change of fibers during spinning can be grasped and measured in real time through scattering patterns of the scattering diagrams. The spinning method is convenient to operate, the spinning machine is reasonable in structure and is used with the synchronous emitting X-ray device in a matched manner, and accordingly structure formation and evolution rules of polymer in the melt spinning process can be detected online, association between the structures of fibers and processing conditions can be expressed, strong technical support is supplied for polymer melt spinning shaping processing and development of high performance fibers and functional fibers can be promoted.

Description

technical field [0001] The invention belongs to the fields of textile and microstructure, and in particular relates to a melt spinning method and a spinning machine utilizing X-ray online synchronous detection. Background technique [0002] The performance of a material is directly determined by its microstructure, so the relationship between structure and performance is a central topic in materials science. Controlling the microstructure during the polymer molding process has become an important means to achieve high performance and functionalization of polymer materials. [0003] Small-angle scattering (SAXS) and wide-angle scattering (WAXS) techniques are effective means to study the multi-level and multi-scale structures of polymer materials. In-situ online research, especially the observation of relatively fast processes, requires a high-intensity X-ray light source. However, the traditional X-ray light source has low intensity and the sample signal accumulation time i...

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Problems solved by technology

However, there are still obvious differences between the real molding process of polymer materials and the single external field action.

[0005] At present, the common method to study the microstructure changes in the melt spinning process of polymer materials is to remove any fiber after spinning, conduct X-ray test, and deduce the formation process of fiber microstructure in the spinning process according to the test results and theoretical simulation. , there is a lack of real-time test results of the fiber microstructure during the spinning process, and the amount of information is small, and after the spinning is completed, the fiber will relax, and the microstructure of the fiber will also change under the influence of temperature and humidity during the placement process. The measured data cannot accurately reflect the fiber structure formed during the spinning process, so the fiber structure obtained by this off-site research method is not accurate

[0006] Some common methods and equipment for fiber processing and manufacturing, such as the utility model high-speed spinning machine disclosed by CN2187178, the utility model plunger type melt spinning machine of the Chinese Publication No. CN2180652, etc., can only work and spin in ordinary environments, and cannot be obtained in time. The fiber structure changes, and there is no device for observing the microstructure and a mechanism suitable for observing the change of the microstructure

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