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Flaratrroo ility
ACRYLITE FF sheet is a combustible thermoplastic. Precautions should be
taken to protect this material from flames and high heat sources. ACRYLITE FF
sheet usually burns rapidly to completion if not extinguished. The products of
combustion, if sufficient air is present, are carbon dioxide and water. However,
in many fires sufficient air will not be available and toxic carbon monoxide will be
formed, as it will when other common combustible materials are burned. We urge
good judgement in the use of this versatile material and recommend that building
codes be followed carefully to assure it is used properly.
Therrinal
The combustibility test data for ACRYLITE FF sheet is: self -ignition temperature
Col dcctivity
(ASTM D-1929) is 850OF (455eC), smoke density as measured by ASTM D-2843 is
6.4 /e, and the rate of burning as measured by ASTM D-635 is 1.0 in/min (25mm/min)
mow^
for 1/8" (3mm) thick sheet. While these data are based on small scale laboratory tests
frequently referenced in various building codes, these tests do not duplicate actual
fire conditions.
ral Shock
Stresses
" �Surfbce Hardness
Electrical
Prippe t®es;,'
The thermal conductivity of a material —its ability to conduct heat —is
called k-Factor. The k-Factor is an inherent property of the material, and is
independent of its thickness and of the surroundings to which it is exposed.
The k-Factor of ACRYLITE FF sheet is: 1.3 B.T.U. or 0.19 W
(hour) (sq. ft.) (OF/inch) m. K
Whereas the k-Factor is a physical property of the material, the U-Factor—or
overall coefficient of heat transfer —is the value used to calculate the total heat
loss or gain through a window.
The U-Factor is the amount of heat per unit time and area which will pass
through a specific thickness and configuration of material per degree of
temperature difference on each of its two sides.
This value takes into account the thickness of the sheet, whether the sheet is in
a horizontal or vertical position, as well as the wind velocity.
U-Factors are based on specific conditions (e.g., single -glazed or double -
glazed installations) and are different for summer and winter.
Listed below are U-Factors for several thicknesses of ACRYLITE FF sheet for
single -glazed, vertical installations, based on the standard ASHRAE' summer
and winter design conditions.
11J-Factors-BTtl1bour sq. ft. dF (whn' m K)
RYL_
ACITE FF — — — -- —Summer
Sheet Thickness Conditions Conditions
.118 (3.0 mm) 0.98 (5.56) _ 1.06 (6.02)
.177 (4.5 mm) 0.94 (5.34) 1.02 (5.79)
.236 (6.0 mm) 0.90 (5.11) 0.97 (5.51)
.375 (9.5 mm) 0.83 (4.71) 0.89 (5.05)
'Annedoen Society of Heating, Refrigerating and Air-Condtioning Engineers
The total heat loss or gain through a window (due to temperature difference
only) can be calculated by multiplying the area of the window, times the
difference between indoor and outdoor temperatures, times the appropriate
U-Factor (from Table above). Heat intake through solar radiation must be
added to arrive at the total heat gain.
ACRYLITE FF sheet is a better insulator than glass. Its U-Factor or overall
coefficient of heat transfer is approximately 10% lower than that of glass of the
same thickness. Conversely, its RT-Factor is about 10% greater.
ACRYLITE FF sheet is more resistant than glass to thermal shock and to stresses
caused by substantial temperature differences between a sunlit and a shaded area
of a window or by temperature differences between opposite surfaces of a.window.
The surface of plastic is not as hard as that of glass. Therefore reasonable care
should be exercised in handling and cleaning ACRYLITE FF sheet.
ACRYLITE FF sheet has many desirable electrical properties,•It is'a I
,good insulator. Its surface resistivity is higher than that of most plastics. #
Continuous outdoor exposure has little effect on !its electrical properties;, ' . .
Thermal
ErE 7 ,:n:t
ensile Strength
Elongation, Rupture
Modulus of Elasticih
Modulus of
Deflection
ASTM
Method
D 256
D 785
D 1003
10,000 psi (69 M Pa)
4.5%
400,000 psi (2800 M F
17,000 psi (117 M Pa
480,000 psi (3300 M P
17,000 psi 117 M Pa
0.4 ft. Ibsfin. of notch
21.6 J/rrof notch
M-93
48
1.49
under load, 264 psi D 648 195-F (91 °C) _
Vicat Softening Point D 1525 220OF (1050C)
Maximum Recommended Continuous
Service Temperature
— 160°Flc) (711C)
_
Coefficient of Linear
_
0.000040 in/in - OF
Thermal Expansion
D 696 (0.000072 m/m - -C)
Coefficient of
1.3 BTU/(Hr) (Sq. Ft.) (OF / in.)
Thermal Conductivity
Cenco-Fitch (0.19 w/m•K)_
Flammability, Burning Rate
1.0 in/min.
(0.125" thickness)
D 635 (25 mm/min.)
Specific Heat @ 77OF 0.35 BTU/(Ib.) (OF)
Dielectric Strength
Short Time (0.125")
D 149 430 volts/mil (17 KV/mm)
Dielectric Constant
60 Hertz
D 150 3.6
1000 Hertz
3.3
1000000 Hertz
2.8
ulssipation 1-actor
60 Hertz D 150 0.06
1000 Hertz 0.04
24 hrs @ 730F D 570 0.2%
Odor — nt r .
TasteNone --------
-
NOTES: (a) Typical values; should not be used for specification purposes. (c) It is recommended that temperatures not exceed 160°F
(b) Values shown are for 0.250" thickness. Some values will change for continuous service, or 190°F for short intermittent use.
with thickness or pigmentation.
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