Photochromic thermal insulation fiber and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12234576-B2
Application number	US-202217697531-A
Country	US
Kind code	B2
Filing date	Mar 17, 2022
Priority date	May 28, 2021
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

The present disclosure provides a photochromic thermal insulation fiber including a core layer and a sheath layer covering the core layer. The core layer includes about 99 parts by weight to 100 parts by weight of polypropylene and about 0.4 parts by weight to 0.6 parts by weight of a photochromic dye. The sheath layer includes about 98 parts by weight to 99 parts by weight of nylon and about 1 part by weight to 2 parts by weight of a near-infrared reflecting dye.

First claim

What is claimed is:

1. A photochromic thermal insulation fiber, comprising:
a core layer, the core layer comprising:
99 parts by weight to 100 parts by weight of polypropylene; and
0.4 parts by weight to 0.6 parts by weight of a photochromic dye; and
a sheath layer covering the core layer, the sheath layer comprising:
98 parts by weight to 99 parts by weight of nylon;
0.1 parts by weight to 0.2 parts by weight of an ultraviolet absorber; and
1 part by weight to 2 parts by weight of a near-infrared reflecting dye.

2. The photochromic thermal insulation fiber of claim 1 , wherein the photochromic thermal insulation fiber comprises 40 parts by weight to 60 parts by weight of the core layer and 40 parts by weight to 60 parts by weight of the sheath layer.

3. The photochromic thermal insulation fiber of claim 1 , wherein the near-infrared reflecting dye is nickel antimony titanium yellow dye.

4. The photochromic thermal insulation fiber of claim 1 , wherein the ultraviolet absorber and the photochromic dye have different absorption spectrums from each other.

5. The photochromic thermal insulation fiber of claim 1 , wherein the sheath layer further comprises 0.5 parts by weight to 1 part by weight of titanium dioxide.

Assignees

• Taiwan Textile Res Inst

Inventors

• Chiang Jo-Cheng
• Liu Chao-Huei

Classifications

• C08J3/22

  using masterbatch techniques · CPC title

• D10B2321/022

  polypropylene · CPC title

• D01D5/10

  using organic materials · CPC title

• D01D1/04

  Melting filament-forming substances · CPC title

• D10B2401/20

  optical · CPC title