Tuesday, September 02, 2014
Santoprene™ 8281-35MED
Units 
ExxonMobil Chemical - Thermoplastic Vulcanizate
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General Information
Product Description
A soft, colorable, specialty, non-hygroscopic thermoplastic vulcanizate (TPV) in the thermoplastic elastomer (TPE) family. It is designed for use in medical and healthcare applications. This grade of Santoprene TPV is shear-dependent and can be processed on conventional thermoplastics equipment for injection molding. It is polyolefin based and recyclable within the manufacturing stream.
General  
Material Status 
  • Commercial: Active
Availability 
  • Africa & Middle East
  • Asia Pacific
  • Europe
  • Latin America
  • North America
Features 
  • Autoclavable
  • Biocompatible
  • Good Chemical Resistance
  • Good Colorability
  • Low Extractables
  • Low to No Water Absorption
  • Oil Resistant
  • Radiation Sterilizable
  • Recyclable Material
  • Steam Sterilizable
Uses 
  • Medical/Healthcare Applications
Agency Ratings 
  • EU Annex XVII of Regulation (EC) No 1907/2006
  • USP Class VI
 
RoHS Compliance 
  • RoHS Compliant
Appearance 
  • Natural Color
Forms 
  • Pellets
Processing Method 
  • Injection Molding
  • Multi Injection Molding
 
ASTM & ISO Properties 1
Physical
Nominal Value
Unit
Test Method
Specific Gravity
0.908
g/cm³
ASTM D792
Density
0.910
g/cm³
ISO 1183
Elastomers
Nominal Value
Unit
Test Method
Tensile Stress - Across Flow (100% Strain, 23°C)
0.900
MPa
ASTM D412
Tensile Stress - Across Flow (100% Strain, 23°C)
0.900
MPa
ISO 37
Tensile Strength - Across Flow (Break, 23°C)
2.60
MPa
ASTM D412
Tensile Stress - Across Flow (Break, 23°C)
2.60
MPa
ISO 37
Tensile Elongation - Across Flow (Break, 23°C)
330
%
ASTM D412
Tensile Elongation - Across Flow (Break, 23°C)
330
%
ISO 37
Tear Strength - Across Flow  2
    ASTM D624
23°C
9.00
kN/m
 
100°C
4.00
kN/m
 
Tear Strength - Across Flow  3
    ISO 34-1
23°C
9.0
kN/m
 
100°C
4.0
kN/m
 
Compression Set 4 (23°C, 168 hr)
13
%
ASTM D395B
Compression Set 5 (23°C, 168 hr)
13
%
ISO 815
Hardness
Nominal Value
Unit
Test Method
Shore Hardness (Shore A, 15 sec, 23°C, 2.00 mm)
39
 
ISO 868
Additional Information
Where applicable, test results based on fan gated, injection molded plaques.
Tensile strength, elongation and tensile stress are measured across the flow direction - ISO type 1, ASTM die C.
Compression set at 25% deflection.
Legal Statement
For detailed Product Stewardship information, please contact Customer Service.

This product, including the product name, shall not be used or tested in any medical application without the prior written acknowledgement of ExxonMobil Chemical as to the intended use.
Processing Information
Injection
Nominal Value
Unit
 
Suggested Max Moisture
0.080
%
 
Suggested Max Regrind
20
%
 
Rear Temperature
177 to 191
°C
 
Middle Temperature
179 to 193
°C
 
Front Temperature
185 to 199
°C
 
Nozzle Temperature
185 to 210
°C
 
Processing (Melt) Temp
143 to 216
°C
 
Mold Temperature
23.9 to 51.7
°C
 
Injection Rate
Fast
 
 
Back Pressure
0.345 to 0.689
MPa
 
Screw Speed
100 to 200
rpm
 
Clamp Tonnage
4.1 to 6.9
kN/cm²
 
Cushion
3.18 to 6.35
mm
 
Screw L/D Ratio
16.0:1.0 to 20.0:1.0
 
 
Screw Compression Ratio
2.0:1.0 to 2.5:1.0
 
 
Vent Depth
0.025
mm
 
Injection Notes
Santoprene TPV is incompatible with acetal and PVC.
Notes
1Typical properties: these are not to be construed as specifications.
2Die C
3Method Bb, Angle (Nicked)
4Type 1
5Type A
 
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