High intensity and large length-diameter ratio ceramic spinneret and production method

A technology of large aspect ratio and spinneret, which is applied in the direction of spinneret assemblies, textiles and papermaking, etc., can solve problems such as deformation of metal parts, and achieve excellent high-temperature performance

Inactive Publication Date: 2009-06-17
NINGBO DONGLIAN MECHANICAL SEAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often, high temperatures, while completely necessary for cleanliness, also unavoidably cause deformation of metal parts

Method used

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  • High intensity and large length-diameter ratio ceramic spinneret and production method
  • High intensity and large length-diameter ratio ceramic spinneret and production method
  • High intensity and large length-diameter ratio ceramic spinneret and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Select Si 3 N 4 The biscuit is drilled by the laser directional distribution drilling technology, and the dense Si is obtained after sintering. 3 N 4 spinneret. The aspect ratio of the spinneret hole is 15, the pitch of the spinneret hole is 1 mm, and the diameter of the spinneret hole is 190 μm. The surface tension of the spinneret and the PAN-DMSO spinning solution is more than 30% smaller than that of conventional stainless steel spinneret materials through surface tension measurement and comparison.

Embodiment 2

[0018] Choose Al 2 o 3 Or Sialon green body or pre-sintered high-strength material is punched in the same manner as in the embodiment, the hole distance is 0.8 mm, the hole diameter is 0.2 mm, and the rest is the same as in embodiment 1.

Embodiment 3

[0020] The influence of different aspect ratio ceramic spinnerets of embodiment 1 or 2 on the original structure and properties of PAN was tested.

[0021] 1 Test materials and conditions

[0022] 1.1 Experimental raw materials: PAN copolymer (acrylonitrile: itaconic acid = 98:2): Shanghai Synthetic Fiber Research Institute, viscosity average molecular weight Wv = 7.8×10 4 g·mol -1 ;

[0023] Dimethyl sulfoxide DMSO (analytical pure): Shanghai Wulian Chemical Co., Ltd.;

[0024] 1.2 Experimental conditions

[0025] The length-to-diameter ratio (L / D) is 2,5,10,15,20 respectively, and the single-hole ceramic spinneret with aperture=0.2mm; uses DMSO as solvent, and configures a spinning stock solution with a concentration of 23%; spinning temperature They are 60°C, 65°C, and 70°C respectively; the concentration of the coagulation bath is 50%, and the temperature is 40°C; the extrusion speed of the stock solution is 1.4m / min and 3.4m / min respectively; the height of the air lay...

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Abstract

The invention relates to a ceramic spinneret with high strength and large length-diameter ratio, and belongs to the textile field. The ceramic spinneret is characterized by being made from single-phase or complex phase ceramics with high strength such as Si3N4, Al2O3, Sialon and the like. Thickness of the spinneret is 3-4mm, the length-diameter ratio of a spinneret orifice thereof is more than 15, which causes the spinneret to be capable of bearing the working pressure above 30kg/cm<2>. The large length-diameter ratio can well help relieve brass bulking during spinneret jetting process, and is applicable to a dry-wet spinning process adopted in manufacturing high-strength PAN fiber, and the ceramic materials have the characteristics of good corrosion resistance, good high-temperature resistance and the like, and is suitable for being used and cleaned under a severe environment.

Description

technical field [0001] The invention relates to a ceramic spinneret and a manufacturing method thereof, in particular to making a spinneret with high strength and large length-to-diameter ratio by utilizing the high strength and processing characteristics of structural ceramics. It belongs to the textile field. Background technique [0002] The spinneret (head) is a precision part of the chemical fiber spinning machine and the core component of the spinning device. Its material, shape and characteristic size are important conditions to ensure the quality of the finished fiber. In the early days of the chemical fiber industry, inert gold-platinum alloys were widely used as the main material of foreign spinnerets. Due to the hardness and price considerations, tantalum-niobium alloys and AISI316 and other chemically resistant but softer stainless steels were gradually used. Later, AISI630 replaced AISI316, and now many companies use Carpenter450 and some other martensitic stai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D4/02C04B35/584C04B35/599C04B35/10
Inventor 李友宝寇华敏潘鼎励永平潘裕柏陈惠芳励才勋张庆青郭景坤孙兴伟李包顺高建
Owner NINGBO DONGLIAN MECHANICAL SEAL
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