Skin-core structure fibers with both infrared and radar stealth, preparation method therefor, and use thereof

Patent metadata

Field	Value
Publication number	US-12104882-B2
Application number	US-202218287189-A
Country	US
Kind code	B2
Filing date	May 10, 2022
Priority date	Jun 15, 2021
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

Skin-core structure fibers with both infrared and radar stealth, a preparation method therefor, and the use thereof are provided. The fibers are as follows: a core material of the skin-core structure fibers comprises the following raw materials in parts by weight: 10 parts of paraffin; 0.7-1.5 parts of an electromagnetic wave absorbent; and 1 part of a high-molecular polymer, wherein the electromagnetic wave absorbent is one or more of ferroferric oxide-intercalated graphene oxide, nano ferroferric oxide and carbon black, and wherein the skin-core structure fiber is obtained by spinning the core material with a skin-layer material.

First claim

What is claimed is:

1. A method for preparing skin-core structure fibers with both infrared and radar stealth, comprising the following steps:
Step 1), melting in parts by weight 10 parts of paraffin and adding with 0.7 parts to 1.5 parts of an electromagnetic wave absorbent, stirring evenly and thoroughly to obtain molten solution S1, wherein the electromagnetic wave absorbent is a combination of a carbon black and one or more of a ferroferric oxide-intercalated graphene oxide and a nano ferroferric oxide;
Step 2), melting 1 part of a high-molecular polymer, subsequently adding the high-molecular polymer into the molten solution S1, stirring thoroughly and evenly and then drying to obtain a core material S2, wherein the high-molecular polymer is one or more of a polyethylene, a polypropylene and an ethylene-vinyl acetate;
Step 3), dissolving polyacrylonitrile into a N, N-dimethylacetamide, stirring evenly and standing still, to obtain an external phase spinning solution; and
Step 4), taking the core material S2 as the core material and taking the external phase spinning solution as a skin material for solution spinning, to obtain the skin-core structure fibers with both infrared and radar stealth.

2. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 1 , wherein a melting temperature of the paraffin in Step 1) is 70° C.

3. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 1 , wherein a melting temperature of the high-molecular polymer in Step 2) ranges from 130° C. to 140° C.

4. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 1 , wherein a standing time in Step 3) is 10 hours.

5. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 1 , wherein a mass concentration of the polyacrylonitrile in the external phase spinning solution in Step 3) ranges from 20% to 25%.

6. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 3 , wherein a nozzle temperature of the core material in Step 4) is controlled from 140° C. to 150° C.

7. A method for preparing an infrared stealth material and a radar stealth material, comprising needling the skin-core structure fibers with both infrared and radar stealth prepared by the method according to claim 1 into felt.

Assignees

• Univ Nantong

Inventors

• Ye Wei
• Zhang Xing
• Sun Qilong
• Long Xiaoyun
• Gao Qiang
• Ji Tao

Classifications

• D10B2507/00

  Sport; Military · CPC title

• D10B2401/00

  Physical properties · CPC title

• D10B2321/10

  polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide · CPC title

• D10B2321/02

  polyolefins · CPC title

• D04H1/46

  by needling or like operations to cause entanglement of fibres (D04H1/45 takes precedence; needling machines D04H18/00) · CPC title