Tuesday, May 20, 2008

Acrylic

Advantages of Acrylic
Ease of FabricationWhen Acrylic is heated to its forming temperature (approximately 325ºF) it becomes soft and pliable and can be formed into a variety of shapes. As the material cools in its formed state, it solidifies and holds the shape to which it has been formed. Because the material is formed at low pressure, molds can be made from plastic and low-cost wood. Acrylic can also be machined, drilled and sawed like wood or soft metals.
Excellent Electrical PropertiesAcrylic has certain unmatched electrical properties which are affected slightly by weathering or moisture. Its surface resistivity is higher than most plastic materials and its power factor decreases with increased frequency.
LightweightAcrylic is less than 50% as heavy as glass, is 43% as heavy as aluminum and 70% as heavy as magnesium.
· Impact ResistantAlthough it weighs less than half as much as glass, Acrylic has from 6 to 17 times greater impact resistance than ordinary glass in thicknesses of .125" to .250"
· Weather ResistantAcrylic sheet withstands weather and sun exposure with almost no loss of light transmittance, clarity and strength in over a quarter century of usage.
Typical Properties
Dimensional stability
Impact resistant
Excellent fabrication characteristics
Lightweight
Excellent clarity
Tough and durable
Good U factor
Weather resistant
Heat resistant
Recommended Operating Limits
ASTM
UNITS
ACRYLIC
Mechanical



Tensile Strength Flexural StrengthModulus of ElasticityCompressive Strength @ YieldIzod Impact Strength (notch)Hardness Rockwell BarcolLight TransmissionSpecific GravityWater Absorption/Saturation
D638D790D790D695D256D785D2583D1003D792D570
psipsipsipsift•lbs/inM%1 = water%
10,00017,000480,00017,0000.49348921.190.2
Thermal



Heat Deflection Temperature Under Load, 264 psiThermal ExpansionFlammability/Burning Rating 0.125"Self Ignition Temperature
D648D696D635D1929
ºFin/inºFin/minºF
195.0000401.0830
Electrical



Dielectric Strength (short time) 0.125" Dielectric Constant 60 Hz 1000 HzDissipation Factor 60 Hz 1000 Hz
D149D150D150D150D150
V/mil
4303.63.30.060.04


http://www.alro.com/DIVplastics/plastic_product_acrylic.htm

No comments: