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Composite Manufacturing
Technical Information and Test Results for FenFormTM Silicone Sheet
ContentsFenFormTM Typical Physical Properties 4General Materials Properties 4Recommended Curing Conditions 4Packing Details 4Cured Material Specification 5Testing Method 7Physical Properties after Cycle Conditioning 8DOE Analysis: Tensile Strength 9DOE Analysis: Elongation at Break 10DOE Analysis: Modulus at 300% 11Cycles to Failure 12Summary of Results 13
Used in the manufacture of composite materials
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FenFormTM Typical Physical Properties
Standard thickness of 0.9mm to 3.5mm (0.35” to 1.38”).Standard widths of up to 1500mm (59.06”).Available both cured and uncured.Cured material has a fine fabric impression to aid removal.Standard colours of translucent and grey.Standard 50 durometer, additional hardness grades available on request.
General Materials Properties(FenFormTM 50)Working Temperature R.T.I. 1500CShelf Life (Uncured): 6 months from date of
manufacture when stored at 240C wrapped as supplied
Recommended Curing ConditionsPress cure for 5 minutes at 1160C with 200psi (1.MPa) of pressure.
Packing DetailsProtected both sides with polythene film. Packed in cardboard cartons supported on a central tube.
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Cured Material Specification
Property Test Method Units Typical Values FenFormTM 50
Hardness ASTM D2240 0Shore A 51
Density ASTM D2792 g/cm3 1.15
Tensile Strength
ASTM D412 DIE C
MPa 10
Elongation at Break
ASTM D412 DIE C
% 600
Tear Strength ASTM D624 DIE B
KN/m 33
Compression Set
ASTM D395 22h @ 1770C
% < 45 (4 hours @ 2000C)
Dielectric Strength
Kv/mm 20
Thermal Expansion
m/m0C 6.5
Colours Grey & Translucent
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FenFormTM silicone membranes are the flexible choice for your composites
manufacture
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Testing Method
Fenner Precision owns a well-equipped on-site testing laboratory, which includes a Tensometer equipped with an environmental chamber.
DOE (Design of Experiments) was carried out on FenFormTM and a competitor’s equivalent product.
The factors investigated were:TemperatureExtensionNumber of cycles
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Physical Properties after Cycle Conditioning
FenFormTM
Competitor’s Material
Temperature(0C)
Cycles Tensile Strength
ElongationAt Break
Modulus at Elongation %
100% 200% 300%20 50 7.87 814 0.877 1.875 2.662
100 5.2075 542.7 0.9045 1.9275 2.7845
200 2.9075 329.45 0.8625 1.834 2.6425
20 150 7.41 786 0.845 1.859 2.658
100 5.1555 558.5 0.849 1.883 2.725
200 3.299 351.4 0.866 1.897 2.823
Temperature(0C)
Cycles Tensile Strength
ElongationAt Break
Modulus at Elongation %
100% 200% 300%20 50 7.37 933 0.713 1.506 2.137
100 3.955 697 0.715 1.537 2.182
200 2.508 374 0.78 1.613 1.777
20 150 7.29 926 0.683 1.498 2.14
100 3.984 679 0.705 1.559 2.217
200 2.95 414 0.726 1.559 2.221
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DOE Analysis: Tensile Strength
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DOE Analysis: Elongation at Break
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DOE Analysis: Modulus at 300%
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Cycles to Failure
Material samples were cycled under controlled conditions until failure.
Sample Temperature 0C
Extension %
Sample Thickness (mm)
Average Number of Cycles to Break
FenFormTM 200 300 2.145 104
Competitor’sMaterial
200 300 2.32 77.5
When FenFormTM was cycled at extreme conditions (to give a manageable testing time), it lasted an average of 25% longer than the competitor’s product.
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Summary of Results
FenForm’sTM Tensile Strength is higher than the competition’s. The difference is maintained as the temperature and cycles are increased.
The difference between the Elongation at Break of FenFormTM and the competitor’s material decreases at higher temperatures.
The Modulus figure at a given elongation is higher for FenFormTM than the competitor’s material. The figure is more consistent as the temperature and cycles are increased.
FenFormTM gives 25% more cycles than the competition when tested at the same temperature and with the same elongation conditions.
FenFormTM is a stronger material that gives a more consistent performance at operating temperature from first cycle to last.
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When quality is paramount, FenFormTM is the most
reliable choice
Reusable FenFormTM silicone sheet outperforms the competition round after round
FenFormTM: the Heavyweight Champion for Composites Manufacture
For more information, contact:
Fenner [email protected]: +44 (0)1522 551010Fax: +44 (0)1522 511252
www.fennerprecision.com
ISO 9001 2008Made in England