SPECIAL CHARACTERISTICS OF ACRYPOLY
- Light In Weight
- ACRYPOLY (Specific gravity 1.19) is less than as compared with inorganic glass (Specific gravity 2.5).
- 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.
- 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.
- 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.
- 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.
- 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
- 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
- Thermal Conductivity
- The thermal conductivity of ACRYPOLY is as small as that of phenolics and only one sixth of that of glass.
- 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.
- Chemical Resistance
- It is insolvent to inorganic chemicals and normal chained hydrocarbon, but contact with inorganic solvent causes dissolution, swelling, hazing and cracking
- 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:
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- Hexane, Octane, Formaline 40%, Glycol, Keten.
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- Insoluble but swelled or crazing:
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- Methyl alcohol, Ethyl Alcohol, Isopropyl Alcohol, Carbontetrachloride.
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- Soluble at normal tempaerature:
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- Acetone, Benzone, Totuol, Xylol, Ethylenedichloride, Cholroform, Ethylacetate.
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The Pros and Cons of Casting vs Extruded Sheets
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 |