TABLE 3-6
Annealing Schedule for Acrylic Plastic Windows
A. Recommended Heating Times for Elevated
Temperature Annealing of Acrylic
Thickness
Heating Time* in Hours for Acrylic Placed
(inches)
in a forced-Circulation Air Oven Maintained
at the Indicated Temperature
212F
195F
185F
(100C)
(90C)
(85C)
0.500 to 0.750 inc.
4
6
11
0.875 to 1.125 inc.
4-1/2
6-1/2
11-1/2
1.250 to 1.500 inc.
5
7
12
1.750
5
7
12
2.000
6
8
13
2.250
7
9
14
2.500
9
11
15
3.000
11
12
17
3.250
13
14
17
3.500
13
14
19
3.750
14
16
20
4.000
17
18
22
*
Includes period of time required to bring part up to annealing temperature
but not cooling time
B. Recommended Cooling Rates for Acrylic Subjected
to Elevated Annealing Temperatures
Time in Hours to Cool Acrylic from the
Maximum
Indicated Annealing Temperature at the
Thickness
Cooling
Maximum Permissible Rate to Removal
(inches)
Rate
Temperature of 160 deg. F
deg. F/hr
212F
195F
185F
(deg. C/hr)
(100C)
(90C)
(85C)
0.500 to 0.750 inc. 14
(25)
2
1-1/4
1
0.875 to 1.125 inc. 10
(18)
3
2
1-3/4
1.250 to 1.500 inc. 7.2 (13)
4
2-1/2
2
1.750
6.1 (11)
4-1/2
2-3/4
2
2.000
5.5 (10)
5-1/4
3-1/2
2-1/2
2.250
5
( 9)
6
4
3
2.500
4.5 ( 8)
6-1/2
4-1/4
3-1/4
3.000
4
( 7)
7-1/4
4-3/4
3-1/2
3.250
3.5 ( 6)
8
5-1/4
4
3.500
3.5 ( 6)
8-3/4
5-3/4
4-1/4
3.750
3.5 ( 6)
9-1/4
6-1/4
4-1/2
4.000
3
( 5)
10-1/2
6-3/4
5
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