Heat-ray-blocking fluororesin film

Patent metadata

Field	Value
Publication number	US-10563454-B2
Application number	US-201414779229-A
Country	US
Kind code	B2
Filing date	Mar 18, 2014
Priority date	Mar 25, 2013
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A heat-ray-blocking fluororesin film includes a heat-ray-blocking metal oxide and a hydrotalcite-type compound represented by Chemical Formula [1], wherein the content of the hydrotalcite-based compound is 0.03 to 1.0 wt %. The heat-ray-blocking fluororesin can exhibit excellent heat-ray-blocking performance while keeping the properties inherent in fluororesin films such as mechanical properties, transparency and long-term weatherability and is transparent and can be used out of doors for a long period of time, wherein

Mg 2+ 1−a .Al 3+ a (OH − ) 2 .AN n− a/n .c H 2 O

where 0.2≤a≤0.35 and 0≤c≤1; AN n− indicates n-valent anion.

First claim

The invention claimed is:

1. A heat-ray-blocking fluororesin film comprising a fluororesin, a heat-ray-blocking metal oxide and a hydrotalcite-based compound having Chemical Formula [1]:
Mg 2+ 1−a .Al 3+ a (OH − ) 2 .AN n− a/n .c H 2 O  [1]

where 0.2≤a≤0.35 and 0≤c≤1; AN n− indicates n-valent anion and the heat-ray-blocking metal oxide has a content A [wt %] to satisfy Formula (1) with a film thickness t [μm] of 50 to 250 μm:
1 /t≤A≤ 200 /t   (1),

wherein content of the hydrotalcite-based compound is 0.06 to 1.0 wt %, the fluororesin is an ethylene tetrafluoroethylene-based copolymer, and the heat-ray-blocking fluororesin film is formed by a melt-extrusion film formation method.

2. The heat-ray-blocking fluororesin film according to claim 1 , wherein the heat-ray-blocking metal oxide has an average particle diameter of 5 to 100 nm.

3. The heat-ray-blocking fluororesin film according to claim 1 , wherein the hydrotalcite-based compound has an average particle diameter of 10 to 900 nm.

4. The heat-ray-blocking fluororesin film according to claim 1 , wherein a light transmittance T IR [%] in wavelength 1800 to 2200 nm satisfies Formula (2):
20 ≤T IR ≤70  (2).

5. The heat-ray-blocking fluororesin film according to claim 1 , wherein the heat-ray-blocking metal oxide is a indium tin oxide.

6. The heat-ray-blocking fluororesin film according to claim 2 , wherein the hydrotalcite-based compound has an average particle diameter of 10 to 900 nm.

7. The heat-ray-blocking fluororesin film according to claim 2 , wherein a light transmittance T IR [%] in wavelength 1800 to 2200 nm satisfies Formula (2):
20≤ T IR ≤70  (2).

8. The heat-ray-blocking fluororesin film according to claim 3 , wherein a light transmittance T IR [%] in wavelength 1800 to 2200 nm satisfies Formula (2):
20≤ T IR ≤70  (2).

9. The heat-ray-blocking fluororesin film according to claim 2 , wherein the heat-ray-blocking metal oxide is a indium tin oxide.

10. The heat-ray-blocking fluororesin film according to claim 3 , wherein the heat-ray-blocking metal oxide is a indium tin oxide.

11. The heat-ray-blocking fluororesin film according to claim 4 , wherein the heat-ray-blocking metal oxide is a indium tin oxide.

Assignees

• Toray Advanced Film Co Ltd
• Toyocolor Co Ltd
• Toyo Ink Sc Holdings Co Ltd

Inventors

• Imaizumi Kazuyuki
• Noguchi Yukio
• Kimoto Atsushi
• Tamura Shinichi
• Kaneko Yoshihiro
• Horiguchi Takashi
• Kawamura Masayasu

Classifications

• C08J2327/12

  containing fluorine atoms · CPC title

• C09D127/18

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title

• C08K2003/2227

  of aluminium · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title