Double-sided reflector films
AssigneeSouthwall Technologies Inc.
InventorsF. Eugene Woodard, Thomas Pass, Ted L. Larsen
Life of this patent
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Abstract
Durable—long lived plastic films carrying sputter-deposited metal layers such as reflective metal layers on both sides are disclosed. The slip side of the plastic film is not preglowed. The nonslip side is preglowed. This combination of glowing and not preglowing leads to the desired long life.
Claims16
A double-sided heat reflector composite film made up of polyester film having a slip side and a nonslip side each side carrying a metal-containing reflector layer and produced by the method, comprising
- a. preglowing only the nonslip side of the film
- b. sputter-depositing a nonslip side reflector layer on the preglowed nonslip side of the film and
- c. sputter-depositing a slip side reflector layer on the nonpreglowed slip side of the film, said film exhibiting a change in yellow index of less than 3 when tested by ASTM G53-84 yellowing test for 2000 hours.
A double-sided heat reflector composite film made up of polyester film having a slip side and a nonslip side each side carrying a metal-containing reflector layer and produced by the method comprising
- a. preglowing only the nonslip side of the film
- b. sputter-depositing a slip side reflector layer on the nonpreglowed slip side of the film and
- c. sputter-depositing a nonslip side reflector layer on the preglowed nonslip side of the film, said film exhibiting a change in yellow index of less than 3 when tested by ASTM G53-84 yellowing test for 2000 hours.
A double-sided heat reflector composite film made up of polyester film having a slip side and a nonslip side each side carrying a metal-containing reflector layer produced by the method comprising
- a. sputter-depositing a slip side reflector layer on the nonpreglowed slip side of the film
- b. preglowing only the nonslip side of the film and
- c. sputter-depositing a nonslip side reflector layer on the preglowed nonslip side of the film, said film exhibiting a change in yellow index of less than 3 when tested by ASTM G53-84 yellowing test for 2000 hours.
A sputter-deposit-produced light transmissive, heat and near infrared reflector sheet comprising:
- a light transmissive polyester film of 0.5 to 25 mil thickness having a first side and a second side
- each side carrying a sputter-deposited light transmissive heat and near infrared reflector comprising a metal layer, said metal layer having a thickness of 40 to 400 Å,
- the first side being a nonpreglowed slip side having a mean roughness of 8 nm or greater at the time of sputter deposition thereupon and the second side being either a preglowed slip side or a preglowed nonslip side,
- said film exhibiting human eye undetectable degrees of yellowing when tested by ASTM G53-84 yellowing test for 200 hours.
Dependencies are inferred from the claim text.