Skin-core composite electromagnetic shielding fiber and preparation method thereof

A composite electromagnetic and fiber technology, applied in fiber processing, fiber chemical characteristics, conjugated synthetic polymer artificial filament, etc., can solve problems such as difficult to be widely used, low electromagnetic shielding efficiency, and easy agglomeration of conductive powder. Achieve the effect of low cost, good practical value and high shielding efficiency

Inactive Publication Date: 2011-08-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent CN1696360A published on November 16, 2005, a skin-core structure electromagnetic shielding fiber with a mixture of conductive powder and polymer as the skin layer and a polymer and microwave absorber as the core layer was prepared. The obtained fiber shields microwaves no more than 90%, indicating that it still has the problem that the conductive powder is easy to agglomerate, and the electromagnetic shielding efficiency is low because the conductive mat...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Pretreatment of low melting point metals and / or alloys

[0041] Isopropyl tricarboxylic titanate and the tin-antimony alloy (60 / 40) particles with an average particle size of 5mm are put into a high-temperature kneader and stirred; when stirring, the rotating speed is 200r / min, and high-speed stirring is performed for 15min, and the treated tin-antimony ( 60 / 40) alloy particles were dried for 2 hours; wherein the mass ratio of tin-antimony (60 / 40) alloy particles to isopropyl tricarboxylic titanate was 99.8:0.2;

[0042] (2) Skin-core composite melt extrusion

[0043] The skin-core composite structural fiber is prepared by two-component composite spinning, and the specific steps are:

[0044] a) Dry the mixture of pretreated tin-antimony (60 / 40) alloy particles and isopropyl tricarboxylic titanate; vacuum-dry PP; The mass ratio of the carboxy titanate mixture to PP is 3:5;

[0045] b) The spinning equipment is preheated to 230°C, and the dried PP is fed into one ...

Embodiment 2

[0048] (1) Pretreatment of low melting point metals and / or alloys

[0049] Mix and dilute isopropyl dioleoyl diisooctyl phosphate acyloxy voltate and isopropanol in equal proportions, then put 1mm tin gold particles into a high-temperature kneader, and spray the above solution directly on the tin gold particles and Stir; rotating speed 200r / min during stirring, high-speed stirring 15min, the tin gold particle after the gained treatment carries out 2h drying; Wherein the mass ratio of tin gold particle and dioleoyl diisooctyl phosphate acyloxy voltate isopropyl voltate is 97: 3;

[0050] (2) Skin-core composite melt extrusion

[0051] The skin-core composite structural fiber is prepared by two-component composite spinning, and the specific steps are:

[0052] a) Dry the mixture of the pretreated tin gold particles and dioleoyl diisooctyl phosphate acyloxy voltate isopropyl voltate; PET is vacuum dried; The mass ratio of the mixture of isopropyl phosphonic acid and PET is 20:...

Embodiment 3

[0057] (1) Pretreatment of low melting point metals and / or alloys

[0058] Mix and dilute isopropyl trioleate and petroleum ether in equal proportions, then put 2mm bismuth gold particles into a high-temperature kneader, and directly spray the above solution on the bismuth gold particles and stir; Rotating speed 200r / min, stirring at high speed for 15min, the obtained treated bismuth particles were dried for 2h; wherein the mass ratio of bismuth gold particles to isopropyl trioleate acyloxy titanate was 97:3;

[0059] (2) Skin-core composite melt extrusion

[0060] The skin-core composite structural fiber is prepared by two-component composite spinning, and the specific steps are:

[0061] a) drying the mixture of pretreated bismuth gold particles and isopropyl trioleate acyloxy titanate; PBT is vacuum dried; bismuth gold particles and isopropyl trioleate acyloxy titanate The mass ratio of the mixture and PBT is 20:5;

[0062] b) The spinning equipment is preheated to 290°C...

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Abstract

The invention relates to a skin-core composite electromagnetic shielding fiber and a preparation method thereof, particularly a skin-core composite structure electromagnetic shielding fiber comprising polymers and low-melting-point metal and a melt composite spinning method thereof. The skin-core composite electromagnetic shielding fiber provided by the invention comprises a skin layer and a corelayer, wherein the skin layer is made of thermoplastic resin, and the core layer is made of a mixture of low-melting-point metal and/or alloy and a coupling agent; and the skin layer and the core layer are respectively a continuous phase. The invention also provides a preparation method of the skin-core composite electromagnetic shielding fiber, which comprises the steps of pretreatment of low-melting-point metal and/or alloy, and skin-core composite melt extrusion. The shell fabric woven from the skin-core composite electromagnetic shielding fiber can effectively shield the interference of electromagnetic waves on human bodies, thereby inhibiting the harm of electromagnetic wave radiation to people.

Description

technical field [0001] The present invention relates to the field of electromagnetic shielding fibers, more specifically, to a skin-core composite electromagnetic shielding fiber and a preparation method thereof, in particular to an electromagnetic shielding fiber with a skin-core composite structure comprising a polymer and a low-melting point metal and its Method of melt composite spinning. Background technique [0002] With the development of information and electronic technology, especially when the use of computers has penetrated into all aspects of social life, people are more and more exposed to electromagnetic radiation. Electromagnetic wave radiation brings many harms to people, such as causing the body temperature to rise, interfering with the inherent electromagnetic wave of the human body, and causing the body's pathological changes. Therefore, electromagnetic radiation needs to be effectively controlled by people, and electromagnetic shielding materials are an ...

Claims

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Application Information

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IPC IPC(8): D01F8/12D01D5/34D01F8/14D01F8/06D01F8/00
Inventor 王依民田原王燕萍郭志洪林佩洁倪建华
Owner DONGHUA UNIV
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