Roofing members without auxiliary facers and related methods

• US 6,117,375 A
• Filed: 04/01/1998
• Issued: 09/12/2000
• Est. Priority Date: 09/23/1996
• Status: Expired due to Term

• Current Assignee: Firestone Building Products Company LLC (Bridgestone Corporation)
• Original Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Inventors: Garrett, Allen M., Letts, John B.
• Primary Examiner(s): Kuhns, Allan R.
• Application Number:
  US09/053,347
• Time in Patent Office: 895 Days
• Field of Search: 264/46.2, 264/45.8, 264/145, 156/247
• US Class Current: 264/46.2
• CPC Class Codes: B29C 44/30 Expanding the moulding material between endless belts or rollers B29C44/203 takes precedence
• CPC Class Codes: B29C 44/56 After-treatment of articles, e.g. for altering the shape
• CPC Class Codes: B29C 67/246 Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM] casting monomers B29C39/006, mixing construction B29B7/74
• CPC Class Codes: E04C 2/205 of foamed plastics, or of plastics and foamed plastics, optionally reinforced
• CPC Class Codes: E04D 11/02 Build-up roofs, i.e. consisting of two or more layers bonded together in situ, at least one of the layers being of watertight composition gravelling of flat roofs E04D7/00; venting or ventilation E04D13/17

Abstract

An insulation board (10) insulation board comprising a foam core (11) selected from the group consisting of polyisocyanurate and polyurethane materials and mixtures thereof; the board being devoid of facers. A method of covering roofs comprises applying insulation boards to a roof deck, the insulation boards comprising a foam core selected from the group consisting of polyisocyanurate and polyurethane materials and mixtures thereof, the boards being devoid of facers; and, applying a weather protective layer over the insulation boards. A continuous method of making a facerless insulation board comprising the steps of feeding a first sheet (24) of temporary facer material into a laminator (25); depositing a foamable polymer liquid (40) onto the first sheet; feeding a second sheet (23) of temporary facer material into the laminator above the foamable polymer liquid; allowing the polymer liquid to rise between the first and second sheets forming polymer foam (44) of a pre-determined thickness; curing the polymer foam under heat (45) to create the insulation board; removing the first and second sheets from the board prior to final curing and cooling; and cutting the board to desired lengths.

Claims

1. A continuous method of making a facerless insulation board comprising the steps of:

feeding a first sheet of temporary facer material into a laminator;

depositing a foamable polymer liquid onto the first sheet;

feeding a second sheet of temporary facer material into said laminator above the foamable polymer liquid;

allowing the polymer liquid to rise between the first and second sheets forming polymer foam of a pre-determined thickness;

curing the polymer foam under heat to create the insulation board;

removing the first and second sheets from the board prior to final curing and cooling;

cutting the board to desired lengths; and

stacking a plurality of said boards in a separator assembly for additional curing and subsequent stacking;

wherein said separator assembly comprises a plurality of arm members attached at one end to a frame member, and wherein said step of stacking includes

placing a first board onto one of said arms;

positioning a subsequent arm over said first board;

repeating said steps of placing and positioning to form a bundle of said boards within said separator assembly; and

storing said boards in said bundle for a period of time sufficient to allow said boards to become dimensionally stable.

2. A continuous method of making a facerless insulation board, as set forth in claim 1, wherein the first and second sheet of temporary facer material comprise high density polyethylene having a thickness in the range from about 0.6 mil to about 200 mil.

3. A continuous method of making a facerless insulation board, as set forth in claim 1, wherein said step of curing the polymer foam under heat comprises passing the polymer foam through an oven.

4. A continuous method of making a facerless insulation board, as set forth in claim 1, wherein the foamable polymer liquid is selected from the group consisting of polyisocyanurate, polyurethane, and mixtures thereof.

5. A continuous method of making a facerless insulation board, as set forth in claim 4, wherein the foamable liquid comprises polyurethane, and wherein said step of depositing a foamable polymer liquid onto the first sheet comprises separately depositing isocyanate components and polyol components from separate sources.

6. A continuous method of making a facerless insulation board, as in claim 1, wherein the first and said second sheet of temporary facer material are the same or different and comprise polymeric materials selected from the group consisting of polyolefins, poly(tetrafluoroethylene), poly(vinylfluoride), poly(trifluoroethylene), poly(vinylidene fluoride), and poly(dimethylsiloxane).

7. A continuous method of making a facerless insulation board, as in claim 1, wherein the foamable polymer liquid is polyisocyanurate.

8. A continuous method of making facerless insulation board, as set forth in claim 1, wherein said plurality of arm members are flexible.