Cast Acrylic Sheets

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Size 915x1830mm (3'x6') 1220x1830mm (4'x6') 1290x1900mm
1220x2440mm (4'x8') 1270x2530mm 1530x2530mm(5'x8')
1880x2530mm (6'x8') 1000x2000mm 1200x2000mm
1300x2000mm 1350x2000mm 1410x2040mm
1070x2170mm 1435x1775mm 1080x1850mm
870x1770mm 960x1870mm 1100x1640mm
1155x1755mm 1240x2040mm  
1240x1780mm (double matt) 1240x2130mm (double matt)  
Color various 　 　
Thickness from 1mm to 100mm 　 　

Cast acrylic sheets consist of the bulk polymerization of methyl methacrylate with the monomer acting as the solvent. The monomer is partially polymerized to a thick syrup. To the syrup additional ingredients are added, such as initators, mould release agents, UV-stabilizers, pigments, etc. The mixture is then poured into the cast cell which consists of two pieces of polished glass, slightly larger than the finished sheet.

The glass plates are held together with clamps that respond to the contraction of the mould caused by the shrinkage of the acrylic as it solidifies. Upon completion of the solidifying process, the mould is dried in an oven and then opened to remove the cast acrylic sheets.

This data sheet describes some of the properties of cast acrylic sheet (S-000, thickness 3mm)

Property
Units
Results
Test Method (ASTM)
Specific Gravity
  
1.19
D 792-60 T
Optical
      
Refractive lndex
  
1.49
D 542-50
Light Transmittance
    
D 1003-61
Parallel
％
92
  
Total
％
93
  
Haze
％
1
  
Mechanical 
      
Tensile Strength
    
D 638-61T
Rupture
kg/c㎡
760
  
Modulus of Elasticity
kg/cm
30000
  
Elongation
％
4.5
  
Flexual Strength
    
D 790-63
Rupture
kg/c
1050
  
Modulus of Elasticity
kg/c
30000
  
Compressive Strength
    
D 695-63 T
Yield
kg/c
1260
  
Modulus of Elasticity
kg/c
30000
  
Shear Strength
kg/c
630
D 732-46
Impact Strength
    
D 256-56
Izod Milled Notch(200 gr.steel ball)
m
0.4
  
Rock Well Hardness
  
M100
D 785-62
Thermal 
      
Hot Forming Temperature
℃
140-180
 

Heat Distortion Temperature 2℃ /min-264 p.s.i
℃
85
           D 648-56
Maximum Recommended Continuous Srve Temperature
℃
85
  
Coefficient of Thermal Conductivity
Cal/cmsec.℃
0.0006
D 696-44
Coefficient of Thermal Linear Expansion
cm/cm.℃
0.00007
  
Specific Heat
Cal/gr℃
0.35
  
Electrical 
      
Surface Resistivity 28℃,75%RH
oh
>1016
  
Volume Resistivity
ohmh.cm
>1015
D 257-61
Dielectric Strength Shot Time Test(0.125 sec.)
kv/c
160
D 149-64
Arc Resistance
  
No Track
D 495-61
Miscellaneous 
      
Flammability
mm/min
33
D 635-63
Water Absorption
      
Wt. Gain on Immersion for 24hrs
％
0.3
D 570-63
Odor
  
None
  
Taste   None  

Resiatant Properties to Chemical Agents

Sufuric Acid 60°C stability to 60%
Nitric Acid 60°C stability to 20%
Caustic Soda 60°C stability to 50%
Aqueous Ammonia 60°C stability to 18%
Acetic Acid 60°C dissolvable
Chlorine Water change to dark color
lodine Tincture easily colorate
Resistant Properties to the Solvents
Corrosion resistant at room temperature: baxane, octane, formaldehyde 40%, methanol, ethanol, glycol, petroleum ( contained a little aromatic group )
Expansion of track at room temperature: chioroform, benzene, toluene, xylene, acetylene dichloride, acetone, ethyl acetate
Usage Outdoor
Color S-000 S-215 S-347 S-4227M S-802
S-000M S-223 S-348 S-431 S-814-1
S-104 S-235 S-367 S-433 S-835
S-128 S-266 S-402M S-502  
S-134 S-322 S-4221M S-502M  
S-136 S-325 S-4223M S-504  
S-2016 S-327 S-4226M S-582  
Usage Indoor　
Color S-005 S-137 S-302 S-4244M S-801
S-019M S-181 S-310 S-4245M S-991
S-097 S-182 S-324 S-520 S-992
S-100 S-184 S-362 S-522 S-993
S-102 S-202 S-373 S-526 S-994
S-111A S-212 S-377 S-530 S-996
S-115 S-301 S-422 S-531 S-844-2 

Physical Properties of Acrylic Sheet

  1. Has the highest ligh transmittance among all kinds of plastic sheets
  2. Light transmittance: 92-93%
  3. Thickness is positively related to light-guide performance
  4. Low specific gravity (1.19); only half weight of glass
  5. Great anti-shatter performance: 7 to 18 times better than glass
  6. lmpact strength is 10 times higher than that of glass
  7. lmpact strength remains unchanged at a low (-50℃) or high (100℃) temperature
  8. Graet weatherability and aging-resistance
  9. Great thermoformability
  10. Good oil and chemical resistance

 

Misunderstandings

  • Acrylic sheet yellows easily :
    Acrylic sheet has a superior weatherability property and dies not yellow easily unless it is made from cheap recycled instead of pure acrylic pallets or clear monomers.
  • Silver streaks can easily appear on the surface of acrylic sheet :
    lt is not common to see crazes on the surface of acrylic sheet unless it is improperly fabricated, packed in a film containing plasticizer of made from cheap recycled material.
  • The color of acrylic sheet fades quickly :
    The color stability of acrylic sheet is usually high unless low-quality (in terms of weatherability) pigments are used for the production.  lt is strongly suggested that you Purchase pigments from suppliers with a good reputation or from our Shopping Acrylicap com.

 

Pay More Attention to the Usage of Acrylic Sheets

Temperature
Acrylic sheets are softened with heating at 100℃ or over.  To prevent from becoming soft, please keep units beyond the place over 100℃.
Scratch The hardness of surface is equivalent to aluminum, thus be careful to surface protection during process.  If there are scratches on the surface of acrylic sheets, polish them with cleaner used for brass that can remove its brilliant surface.
Cleaning Due to acrylic sheet with static electricity, clean the surface with soft and dry cloth wetted 1% soap water when there are dust on the surface.
Swell The coefficient of heat is larger and its tension is about nine times of other metal materials.  Remain enough space for its contractility to variable temperature while you install and fix acrylic sheets steady.
 

Special Instruction Under Installation

Reserve enough space for contractility, the elasticity of cast acrylic sheet per meter is as following, according to the temperature.
  1. After finishing processed acrylic novelties at 10℃, the temperature raises to 50℃ 1000 x 6 x 10-5 x (50-10) = 2.4m/m (elongation)
  2. After finishing processed acrylic novelties at 30℃, the temperature falls to -10℃ 1000 x 6 x  10-5 x (30+10) = 2.4m/m (shrinkage)

You can consult general settlements to prevent from troubles as following
  1. Reserve the frame for contractility
  2. Making ellipical hole with screw
  3. Cushion material as elastic as rubber
  4. Making acrylic novelties into unprominent shape
  5. Using form to increase the cross-sectional coefficient avoiding interior stress

 

Prevent Transformation

  1. Forming acrylic sheets into wave, wrap and through to increase cross-sectional coefficient in order to prevent trans formation from the weight of acrylic sheet itself and lasing
  2. Increasing thickness of acrylic sheet as larger length and dimension
  3. Counting thickness, tension tolerance and bending strength of acrylic sheet to endure wind pressure on the surface