Polyglass Technical Specification

SPECIAL CHARACTERISTICS OF ACRYPOLY

1. Light In Weight
   • ACRYPOLY (Specific gravity 1.19) is less than as compared with inorganic glass (Specific gravity 2.5).
2. Water Clear
   • Colorless ACRYPOLY is as clear as rock crystal. Its light transmittance rate of 93% means that ACRYPOLY is the most clear material available in the market.
3. Weather Resistance
   • ACRYPOLY has an extremely excellent resistance to sunlight, weather, and both high and low temperatures.
   • Outdoor exposure test for all kinds of ACRYPOLY has been done in 2 locations: a desert district of the U.S. and MRC's in Tokyo Plastics Laboratory.
4. Various Colors Available
   • A wide range of transparent colors as well as translucent colors are available.
   • Surface of colored sheet has superior gloss.
   • White translucent colors have a superior light diffusion effect, characteristics of which are rnade good use in lightning diltuser panel, sky-light-dome, sign-board and so on.
5. Impact Resistance
   • ACRYPOLY has a greater impact strength than glass. It is unbreakable when You hit with hammer in case of breakage will not shatter into small pieces which will fly-off in different directions, thus safer than glass.
6. Thermalform Ability
   • Colorless ACRYPOLY is as clear as rock crystal. Its light transmittance rate of 93% means that ACRYPOLY is the most clear material available in the market. Being a thermoplastic, ACRYPOLY becomes soft when heated, and hard when cooled
     
     Typical forming conditions using an air circulating oven follows:

     	ACRYPOLY L SIZE		ACRYPOLY S SIZE
     Thickness	3.0mm	4.0mm	3.0mm	4.0mm
     Single curve forming	140 ~ 145 degree C	140 ~ 145 degree C	140 ~ 145 degree C	140 ~ 145 degree C
     Free Blowing	150 degree C	145 degree C	155 degree C	150 degree C

7. Thermal Conductivity
   • The thermal conductivity of ACRYPOLY is as small as that of phenolics and only one sixth of that of glass.
8. Surface Hardness
   • Generally speaking, the surface hardness of ACRYPOLY is almost the same as that of aluminum. It is harder than some of other plastics sheet but a bit softer than glass.
9. Chemical Resistance
   • It is insolvent to inorganic chemicals and normal chained hydrocarbon, but contact with inorganic solvent causes dissolution, swelling, hazing and cracking
10. Surface Hardness
    • Generally speaking, the surface hardness of ACRYPOLY is almost the same as that of aluminum. It is harder than some of other plastics sheet but a bit softer than glass.

Effect of Solvents

• Unattached at normal temperature:
  
  Hexane, Octane, Formaline 40%, Glycol, Keten.
  
• Insoluble but swelled or crazing:
  
  Methyl alcohol, Ethyl Alcohol, Isopropyl Alcohol, Carbontetrachloride.
  
• Soluble at normal tempaerature:
  
  Acetone, Benzone, Totuol, Xylol, Ethylenedichloride, Cholroform, Ethylacetate.
  

The Pros and Cons of Casting vs Extruded Sheets

2%

Quantity	Casting	Extruded
Appearance	A fine smooth finish on both surfaces can be obtained.	One surface tends to be less than deffect.
Optical	Cast acrylic sheets are glass clear (ie. optically clew). having a light transmission rate of 92%.	Haze is higher than cast sheets.
Shrinkage during forming	2%
Crazing resistence	Cast sheets show exceptional resistance as a result of lower internal stress factors.	Less resistant against crazing due to higher internal stress factors.
Mechanical	Surfaces toughness exceeds extruded sheets due to improved alignment of polymers during polymerization.	Extrusion produces sheets exhibit lower tensile strength due to less alignment of polymers as a result of the wital process of manufacture.
Thermal	Heat distortion temperature is higher. Wrapping is less likely to occur.	Heat distortion temperature is lower. There is a higher tendency for sagging.
Forming	Elongation at break in the melt stage is lower and the achievable tensile strength of formed objects is higher.	Elongation at break in the melt stage is higher. Tensile strength is lower.

Chemical Resistance of Acrypoly

Test Method: ASTM D-543 after 7 days immersion at 25ºC (77ºF).

Reagent	Change in Appearance	Reagent	Change in Appearance
Acetone	Dissolved	Nitric acid (10%)	None
Aniline	Dissolved	Sodium hypochlorite	None
Iso-octane	None	Diethyl ether	Crazing
Ethyl Alcohol (95%)	None	Diemethyl formamide	Dissolved
Ethyl Alcohol (50%)	None	Ammonium hydroxide (S.G.0.9)	None
2-Ethyl hexyl sebacate	None	Ammonium hydroxide (10%)	None
Hydrocloric acid (S.G.1.9)	None	Soap aqua solution (1%)	None
Hydrocloric acid (10%)	None	Sodium carbonate (20%)	None
Sodium chloride (10%)	None	Sodium cabonate (2%)	None
Oleic acid	None	Turpentine	None
Olive Oil	None	Tulene	Dissolved
Hydrogen Peroxide (28%)	None	Kerosene	None
Hydrogen Peroxide (3%)	None	Ethylene dichloride	Dissolved
Sodium hydroxide (48%)	None	Hydroflouric acid (40%)	Swollen, whitening
Sodium hydeoxide (10%)	None	n-Heptane	None
Sodium Hydroxide (1%)	None	Phenolic solution	Swollen, whitening
Citric acid (10%)	None	Transformer oil	None
Chromic acid (40%)	Roughened surface yellowish discoloring	Benzene	Dissolved
Mineral Oil	None	Methyl alcohol	Swollen slightly
Acetic acid (5%)	None	Cotton oil	None
Acetic acid (S.G. 1.42)	Dissolved	Sulfuric acid (S.G. 1.84)	Swollen and dissolved
Ethyl acetate	Dissolved	Sulfuric acid (30%)	None
Carbon tetrachloride	Whitening	Sulfuric acid (3%)	None
Nitric acid (S.G. 1.42)	Dissolved	Water (distilled)	None
Nitric acid (40%)	None	Sea Water	None