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Long-term strong magnetic short fibers of rare earth permanent magnet material and small-batch preparation method of long-term strong magnetic short fibers

A rare earth permanent magnet, short fiber technology, applied in the direction of fiber chemical characteristics, rayon manufacturing, single-component polyester rayon, etc., can solve the problems of low magnetism and poor hand feeling

Inactive Publication Date: 2018-07-20
ZHOUSHAN XINXIN CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the deficiencies and demands of the above-mentioned prior art, and solving the problems of low magnetism and poor hand feeling in the existing magnetic short fiber preparation technology, the present invention provides a long-lasting strong magnetic short fiber made of rare earth permanent magnet material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Prepare magnetic masterbatches used in polyethylene terephthalate (PET) fibers as required, wherein vegetable oil is selected as the coating agent.

[0084] The argon gas was continuously filled into the operation box, and the air in it was exhausted. The air pressure in the operation box was kept at 1.0 kPa lower than the ambient pressure, and the oxygen content was 0.05%. Inject 90 parts of NdFeB magnetic powder into 20 parts of vegetable oil, then add 1.5 parts of silicone additives and transfer to a vertical ball mill, and grind for 30 minutes at a speed of 500 rpm under nitrogen protection to obtain NdFeB Magnetic powder composition. Then the magnetic powder composition was subjected to vacuum pump filtration to filter out excess 11.5 parts of coating agent. Under the protection of nitrogen, add 40 parts by weight of the magnetic powder composition to 60 parts by weight of polyethylene terephthalate chip powder, mix and mix, extrude and granulate through a twin-sc...

Embodiment 2

[0089] Prepare the magnetic masterbatch used in the polypropylene fiber as required, and select polypropylene as the coating agent.

[0090] Continuously fill the operation box with argon, and discharge the air in it. The air pressure in the operation box is kept 1.0kPa lower than that of the environment, and the oxygen content is 0.05%. Inject 85 parts of NdFeB magnetic powder into 25 parts of polyolefin, then add 3.0 parts of ethylene bis stearic acid amide and transfer to a horizontal ball mill, grind for 30 minutes at a speed of 800 rpm and under nitrogen protection, The NdFeB magnetic powder composition is obtained. Then the magnetic powder composition is subjected to vacuum pump filtration to filter out excess 13 parts of coating agent. Under the protection of nitrogen, 35 parts by weight of the magnetic powder composition was added to 65 parts by weight of polypropylene chip powder, mixed and evenly mixed, extruded and granulated by a twin-screw machine to obtain polyp...

Embodiment 3

[0095] Prepare magnetic masterbatches for polypropylene fibers as required, and choose NDZ-101 as the coating agent.

[0096] The argon gas was continuously filled into the operation box, and the air in it was exhausted. The air pressure in the operation box was kept at 1.0 kPa lower than the ambient pressure, and the oxygen content was 0.05%. Inject 80 parts of NdFeB magnetic powder into 1.5 parts of acetone, 4 parts of coating agent NDZ-101 (Comparative Example 1) and 1.5 parts of acetone, 6 parts of coating agent NDZ-101 (Example 3) and stir evenly And transfer to the vertical ball mill, grind for 30 minutes under the speed of 500 rpm and nitrogen protection, obtain the NdFeB magnetic powder composition with two NDZ-101 coating agent contents, then carry out condensation distillation to the magnetic powder composition , recovery aids, to obtain two NDZ-101 coating agent content coated magnetic powder composition. Under the protection of nitrogen, the magnetic powder compos...

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Abstract

The invention relates to long-term strong magnetic short fibers of a rare earth permanent magnet material and a small-batch preparation method of the long-term strong magnetic short fibers. The preparation method disclosed by the invention is characterized in that a magnetic material used in the method for preparing the magnetic short fibers is not a single component, but is a rare earth magneticpowder composition. In addition, the method is applicable to small-batch production. Before spinning, the rare earth magnetic powder composition and magnetic masterbatch are prepared at first; duringspinning, the magnetic masterbatch is added into a resin slice according to a certain proportion to spin the magnetic short fibers with different magnetic powder contents. The rare earth magnetic powder composition used in the method can enable the magnetic material to be higher in stability and magnetism, and does not influence the processibility during preparation of the magnetic masterbatch orspinning of the permanent magnet short fibers, so that the prepared magnetic short fibers are high in magnetic induction intensity and low in cost.

Description

technical field [0001] The invention relates to the field of functional fibers, in particular to a long-acting strong magnetic short fiber of a rare earth permanent magnet material and a preparation method thereof. Background technique [0002] With the development of magnetic therapy technology and health care, textiles with magnetic therapy function have been developed and put into use. The mechanism of magnetic therapy is generally believed to be: the magnetic field promotes circulation by reducing the viscosity of body fluids, activates biological enzymes, controls the movement of hemoglobin, etc., and is effective in reducing stasis, reducing swelling and inflammation, reducing trauma scars, relieving pain, improving sleep, and relieving depression. It has reliable curative effect, and is safe, non-invasive and non-toxic. For the static magnetic field, even if the magnetic induction intensity reaches 2000G, it is still safe for the human body. In short, magnetic therap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F6/46D01F1/10
CPCD01F1/10D01F6/46D01F6/92
Inventor 施楣梧张正松徐毅明
Owner ZHOUSHAN XINXIN CHEM FIBER
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