Desiccated spandrel panels

• US 4,233,796 A
• Filed: 11/22/1978
• Issued: 11/18/1980
• Est. Priority Date: 11/22/1978
• Status: Expired due to Term

• Current Assignee: PPG Industries Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Incorporated (Nouryon BV)
• Inventors: Mazzoni, Renato J., Shoop, Vernon A.
• Primary Examiner(s): Ridgill, Jr., James L.
• Application Number:
  US05/963,075
• Time in Patent Office: 727 Days
• Field of Search: 52/788-792, 52/307, 52/308, 52/171, 52/172, 52/809, 52/172, 52/789, 428/34, 428/38, 156/107
• US Class Current: 52/786.11
• CPC Class Codes: E04C 2/54 Slab-like translucent elements floors for transmitting light E04B5/46; translucent or open-work ceilings E04B9/32, E04B9/34; translucent roof coverings E04D3/06, E04D3/28

Abstract

A hermetically sealed spandrel unit has a transparent sheet mounted in facing relationship to a metal sheet having a desiccant containing film mounted thereon.

Claims

1. A spandrel unit comprising:

a film containing a desiccant;

a pair of panels each having a major surface, the major surface of said panels facing one another with said film between and substantially coextensive with the major surfaces with said desiccant absorbing moisture between the major surfaces; and

sealant means mounting said panels to provide a moisture-resistant barrier against moisture penetration between the major surfaces of said panels.

2. The spandrel unit as set forth in claim 1 wherein said desiccant extends beyond the surface of said film.

3. The spandrel unit as set forth in claim 1 wherein said film has a moisture vapor transmission value of greater than 0 grams/24 hour/1 square meter/mil at 100°

F. (83°

C.) 90% R.H.

4. The spandrel unit as set forth in claim 2 or 3 wherein said film is a coating of paint on the major surface of at least one panel.

5. The spandrel unit as set forth in claim 4 wherein one panel is a metal sheet and said coating of paint is on said metal sheet.

6. The spandrel unit as set forth in claim 1 wherein said film is adherent to the major surface of at least one panel.

7. The spandrel unit as set forth in claim 6 wherein said sealant means includes a composite strip having a moisture resistant adhesive on a foil;

and said composite strip mounted on at least the peripheral edge portions of said panels.

8. The spandrel unit as set forth in claim 6 wherein said sealant means includes a layer of moisture-resistant adhesive between the marginal edge portions of the major surfaces of said panels.

9. The spandrel unit as set forth in claim 6 wherein said desiccant extends beyond a surface of said film.

10. The spandrel unit as set forth in claim 6 wherein said film has a moisture vapor transmission value of greater than 0 grams/24 hour/1 square meter/mil at 100°

F. (83 C) 90% R.H.

11. The spandrel unit as set forth in claim 3 or 10 wherein said film is a polymeric material having desiccating particles dispersed therein.

12. A method of making a spandrel unit, comprising the steps of:

providing a pair of panels each having a major surface;

providing a film containing a desiccant on a major surface of at least one panel the film being substantially coextensive with the major surface of the at least one panel;

mounting the panels with their major surfaces in facing relationship to one another;

sealing the panels to provide a barrier against moisture penetration; and

absorbing moisture between major surfaces of said panels by the desiccant containing film.

13. The method as set forth in claim 12 wherein said step of providing a film containing desiccant includes the steps of:

spraying a coating on the major surface of at least one of the panels; and

providing a desiccant on the coating.

14. The method as set forth in claim 12 wherein said step of providing a film containing a desiccant includes the steps of mixing desiccating particles in a coating having a moisture vapor transmission value of greater than 0.1 grams/24 hours/1 square meter/mil at 100°

F. (83°

C.) 90% R.H. and flowing the coating on the major surface of the at least one panel.

15. The method of making a spandrel unit as set forth in claim 12 wherein said sealing step includes the step of providing a layer of moisture resistant sealant between marginal edge portions of the major surfaces of said panels.