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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 Precisioninfo@fennerprecision.comTel: +44 (0)1522 551010Fax: +44 (0)1522 511252

www.fennerprecision.com

ISO 9001 2008Made in England