Cast Acrylic: Similar to Plexiglas, this acrylic provides outstanding optical clarity even at high thickness. Sheets are thermally pre-shrunk and meet military specification MIL-P-5425

ACRYLITE® GMS ACRYLIC SHEET

DESCRIPTION

ACRYLITE GMS Aerospace Acrylic Sheet is manufactured to meet or exceed the requirements of military specification MIL P-5425E. ACRYLITE GMS sheet is manufactured in equipment that is reserved for aerospace acrylic products, is subjected to a preshrunk cycle, and undergoes an optical inspection which is among the most critical in the industry.

FABRICATION

Any fabrication technique that is appropriate for standard cell cast acrylics will be equally appropriate for ACRYLITE GMS sheet. When drape forming ACRYLITE GMS sheet, excellent results can be achieved if the sheet is heated evenly between 300°F and 320°F. For pressure forming or vacuum forming operations temperatures of 340°F to 380°F are recommended

APPLICATIONS

ACRYLITE GMS sheet is used in aerospace transparent enclosures in monolithic or laminated form. Current applications for ACRYLITE GMS sheet include instrument panels, wingtip lenses, dust covers, helicopter bubbles and aircraft canopies.

PROPERTIES

The table below shows typical values for 0.250 inch thick ACRYLITE GMS sheet. Some values will change with thickness.

TEST METHOD TYPICAL VALUES*

ANGULAR DEVIATION ASTM D-637 <3 minutes

TENSILE STRENGTH ASTM D-638 11,000 psi

ELONGATION ASTM D-638 5.7%

FLAMMABILITY ASTM D-635 1.25 inch/min

DEFLECTION TEMPERATURE ASTM D-648 115°C

(264 psi)

INTERNAL STRAIN MIL P-5425E <1%

RESISTANCE TO WEATHERING MIL P-5425E and

(10 days accelerated) ASTM D-1003 Before After

LIGHT TRANSMISSION 92.6% 92.3%

HAZE 0.40% 0.40%

SPECIFIC GRAVITY ASTM D-792 1.19

THERMAL EXPANSION ASTM D-696 0.000061 in/in-°C

WATER ABSORPTION (24 hr) ASTM D-570 0.33%

* Not for specification purposes

ACRYLITE GMS Sheet Thickness Tolerances:

Class A

Min/Max

Sheet up to and including

36" x 60"

40” x 50”

Class B

Min/Max

Sheet larger than Class A including 48”x48” 53”x80” 60"x72"