COE 601 Property Report
Oct. 2015
Rev. A
NysteinR&D Center
Contents
Section 1: Overview
Purpose
Product Description
Section 2: Volume Resistivity
Pressure probe method
Surface probe method
Section 3: Mechanical Properties
Density
Hardness
Tensile Strength and Elongation
Tear Strength
Static Compression Force Measurements
Section 4: Reliability
Compression Set
Section 5: Environmental & Safety
RoHS & Halogen Compliance
MSDS
Section 6: Summary
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Section1: Overview
Purpose
These measurements reportsare those most needed to describe the product properties, provide information needed by customers and the sales force, and to make decisions regarding the suitability of the product for a given application.
The properties described in this report are relevant to the product’s importantcharacteristic including normal functionreliability test.
Product Description
COE 601 is a kind of co-extrusion conductive elastomer. Non-conductive elastomer SR-300 as the elastic body, and co-extruded with ECE 501 (Ag/Al filled elastomer) as the conductive layer. So it can form the EMI shielding elastomer which conductive part and non-conductive part both worked. SR-300 provides sufficient flexibility to ensure good contact between components thereby achieving a very good environmental seal to prevent water or moisturefrom entering the device. COE 601provides very good electrical conductivity, realizes the electrical integrity of the components and provides excellent electromagnetic shielding performance.
The application of COE 601 is very extensive. Because the section of the product is consistent with the original extrusion strip, it is allowed to be used in the existing flange design. The nickel/graphiteconductive material has excellent electrical properties and provides a more competitive price while maintains excellent shielding effectiveness.
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Section2: Volume Resistivity
Volume resistivity was measured with 2 ways according to MIL-DTL-83528C.
Pressure probe method
1)Having a contacting surface area equal to 0.25 square inch (0.564 inchdiameter) with suitable provisions for attaching ohmmeter leads. Here we use Φ14.3mm*2mm disc.
2)Device is shown in Figure 1. Positiondice between electrodesand test it.
3)Test procedure:
a)Measure and record thickness of material at contact areas to be tested using thickness gauge.Material being tested must have sufficient area to contact entire electrode area.
b)Position material between electrodes and apply pressure of 100 ±5 psi across contact surface area (25pounds load or force).
c)Maintain constant pressure until electrical requirement is met with a maximum time of two minutes.
4)Calculate volume resistivity in ohms-cm using the following formula:
Where:ρ= Volume resistivity (ohm-cm)
R = Observed resistance (ohms)
A = Area of specimen (cm2)
L = Thickness of specimen (cm)
5)Test results
Table 1: Volume resistivity test with pressure probe method of ECE 501
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Sample 4 / Sample 5 / Average
VR Pressure probe method / Ohm-cm / 0.0064 / 0.0056 / 0.0072 / 0.0071 / 0.0072 / 0.0067 / ≤0.008 / Pass
Surface probe method
1)Sample: 150mm*150mm*2mm sheets
2)The test probe shall be a two-point probe as shown on figure 2. The sample being measured shall be placed ona nonconductive surface. Eachelectrode should touch gasket at one point.
3)Test procedure:
4)Calculate volume resistivity in ohms-cm using the following formula:
Where: ρ= DC volume resistivity in ohm-cm.
R = Measured resistance in ohms.
A = Smallest cross section area of part or sample between probe electrodes (cm2).
L = Distance between two electrodes, 2.54 cm.
5)Test results
Table 2: Volume Resistivity test withSurface probe method of ECE 501
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Sample 4 / Sample 5 / Average
VR Surface probe method / Ohm-cm / 0.0023 / 0.0024 / 0.0023 / 0.0022 / 0.0023 / 0.0023 / ≤0.008 / Pass
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Section3: Mechanical Properties
Density
1)Density of COE 601was measured with a QL-300AW ElectronicDensimeter according to standard ASTM D792, method A.
2)Sample preparation: small patch for about 5g.
3)Test procedure:
a)Measure and record the water temperature.Weigh the specimen in air. Record the mass of the specimen, a.
b)Put samples on the support which is immerged in the water.Weight it. Record thisapparent mass as b.
c)The Densimeter would calculate it automatically.
4)Test results are shown in table 3:
Table 3 Density of COE 601
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Average
Density / (g/cm3) / ECE 501 / 2.13 / 2.18 / 2.11 / 2.14 / 2.2±0.2 / Pass
SR-300 / 1.15 / 1.13 / 1.12 / 1.13 / 1.2±0.2 / Pass
Hardness
1)Shore A hardness was measured in accordance with ASTM D2240 with a manual hardness tester, verified by a traceable calibration block, on 3pcsstack-up cured Φ14mm*2mm slabs.
2)Test procedure
a)Place the specimen on the specimen support table, Actuate the release lever of the operatingstand or activate the electromechanical device, allowing thedurometer to descend at a controlled rate and apply the presserfoot to the specimen. Operate the leveror other mechanism to apply the specimen to the indentor in amanner that assures parallel contact of the specimen to thedurometer presser foot without shock.
b)Oncethe presser footis in contact with the specimen, for example, when the initialindentor travel has ceased, the maximum indicated readingshall be recorded. The time interval of 1 s, between initialindentor travel cessation and the recording of the indicatedreading, shall be considered standard.
3)Test results are shown below:
Table 4: Shore A Hardness of COE 601
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Average
Hardness / Shore A / ECE 501 / 61 / 64 / 63 / 62.7 / 65±5 / Pass
SR-300 / 58 / 59 / 57 / 58 / 55±5 / Pass
Tensile Strength and Elongation
1)The samples for tensile strength and % elongation measurements were done in accordance with ASTM D412, using the universal tensile testing machine. The tests were run at a constant speed of 500mm/min.
2)Sample preparation：Cut 2mm thickness slab into dumbbell specimens with Die C dimension. Dumbbell specimensshall be marked with the bench marker which distance shall be as follows: 25.00+/-0.25 mm.
3)Test procedure:
a)Place the dumbbell in the grips of the testing machine, using care to adjust the specimen symmetrically to distribute tension uniformly over the cross section. The rate of grip separation shall be 500 +/- 50 mm/min.
b)Start the machine and note the distance between the bench marks, taking care to avoid parallax. Record the force at the elongation(s) specified for the test.
c)The elongation measurement is made preferably through the use of an extensometer, an autographic mechanism or a spark mechanism.
d)Calculation:
- Tensile strength (PSI):
where:
TS = tensile strength, PSI
Fmax = the maximum force, N
A = cross-sectional area of unstrained specimen, mm2
- Elongation:
where:
E = the elongation in percent (of original bench markdistance), %
L = observed distance between bench marks on theextended specimen, mm
L0 = original distance between bench marks,25mm
4)Test results are shown below:
Table 5: Tensile Strength and Elongation of COE 601
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Average
Tensile Strength / PSI / ECE 501 / 209.9 / 211.5 / 194.1 / 205.1 / ≥180 / Pass
SR-300 / 1135 / 1180 / 1126 / 1147 / ≥900 / Pass
Elongation / % / ECE 501 / 178 / 193 / 199 / 190 / ≥150 / Pass
SR-300 / 512 / 521 / 542 / 525 / ≥300 / Pass
Tear Strength
1)COE 601 samples for tear strength testing were prepared according to ASTM-D624. Tests were conducted at a constant speed of 500mm/min using the universal tensile testing machine.
2)Sample preparation：Cut 2mm thickness slab intoType C (right angle) test piece.
3)Test procedure:
a)Test pieces shall be conditioned & tested at a standard laboratory temperature of 23+/- 2°C
b)Place the test piece in the grips of the testing machine using care to adjust the test piece so that it will be strained uniformly along its length, and that sufficient material is clamped in the grips to minimize slippage.
c)Start the machine at a steady rate of grip separation with 500+/-50 mm/min. Record the maximum force.
d)Calculation the tear strength(PPI)：
Where:
Ts=the tear strength, in PPI
F = the maximum force, in N,
d = the median thickness of each test piece, in mm.
4)Test results list below:
Table 6: Tear Strength of COE 601
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Average
Tear Strength / PPI / ECE 501 / 41.00 / 44.77 / 52.69 / 46.15 / ≥30 / Pass
SR-300 / 154 / 161 / 163 / 159 / ≥60 / Pass
Static Compression Force Measurements
1)Compression force measurements were conducted on 3.2mm*3.63mm*10mmstrip of COE 601, representing static conditions. All strips were extruded then post-cured and put for over 24 hours prior to testing. Data was collected from tests of a new sample strip, measuring the force the first time the strip was compressed. Subsequent compressions will yield a smaller value than the first compression of the strip.
2)Static compression force measurements were made according to NysteinmethodQA-WI-FIP-003. Compression of the strip to a fraction of the original free height was followed by a hold of thirty seconds to allow the strip to equilibrate before the force was measured. The strip was then further compressed, equilibrated, and another measurement performed. Typical results for COE 601 are shown in Figure 3 & Table 7, below.
3)The data shown below can help customer to design structure & application.
Table 7:Static Compression Force, COE 601(3.4mm*3.99mm*10mm)
Compression (%) / Force (N/cm)Sample 1 / Sample 2 / Sample 3 / Average
0 / 0 / 0 / 0 / 0
5 / 7 / 3 / 3 / 4
10 / 9 / 6 / 7 / 7
15 / 11 / 8 / 10 / 10
20 / 12 / 9 / 11 / 11
25 / 13 / 10 / 12 / 12
30 / 14 / 11 / 13 / 13
35 / 17 / 13 / 15 / 15
40 / 23 / 19 / 19 / 20
45 / 31 / 28 / 25 / 28
50 / 42 / 38 / 36 / 39
55 / 58 / 53 / 50 / 54
60 / 78 / 74 / 70 / 74
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Section4: Reliability
Compression Set
1)Compression set was measured in accordance with MIL-DTL-83528C / ASTM D395, method B.
2)Sample size: 6+/-0.2mm height, Φ13+/-0.2mm. The compression device is shown in figure 4.
3)Compression set is reported as the percent of compressed distance that was not recovered.
4)Test procedure:
a)Original Thickness Measurement—Measure the original thickness of the specimen.
b)Place the test specimen between the plates of the compression device with the spacers on each side, allowing sufficient clearance for the bulging of the rubber when compressed. Tighten the bolts so that the plates are drawn together uniformly until they are in contact with the spacers. The amount of compression employed shall be approximately 25 %. (spacer’s thickness is 4.50+/-0.01mm).
c)Sample would be test under the condition of 100℃ / 70 hour.
d)Final column height was measured after 30 minutes recovery at room temperature.
5)Calculate the compression set expressed as a percentageof the original deflection as follows:
where:
CB = compression set expressed aspercentage of the original deflection, %
t0 = original thickness of specimen, mm
ti = final thickness of specimen,mm
tn = thickness of the spacer bar used, 4.5mm
Table 10: Compression Set of COE 601
Test Item / Result / Spec. / ConclusionSample 1 / Sample 2 / Sample 3 / Sample 4 / Average
ECE 501 / t0/ mm / 6.13 / 6.16 / 6.17 / 6.15 / 6.15 / —— / ——
ti/ mm / 5.83 / 5.79 / 5.84 / 5.77 / 5.81 / —— / ——
CB / % / 18.4 / 22.3 / 19.8 / 23.0 / 20.9 / ≤30 / Pass
SR-300 / t0/ mm / 6.08 / 6.11 / 6.12 / 6.15 / 6.12 / —— / ——
ti/ mm / 5.93 / 5.89 / 5.89 / 5.97 / 5.92 / —— / ——
CB / % / 9.5 / 13.7 / 14.2 / 10.9 / 12.1 / ≤30 / Pass
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Section5: Environmental & Safety
RoHSHalogen Compliance
Testing at SGS-CSTC, Ltd., demonstrated compliance of COE 601 with RoHS requirements. Documentation is available. Please contact local engineer for it.
MSDS
An MSDS has been prepared forCOE 601 and should be reviewed prior to use and handling of this product.Please contact local engineer for it.
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Section6: Summary
COE 601is a co-extrusion gasket with SR 300 as the core and Ag/Al filled silicone elastomer as conductive material.It shows good compression set, regardless of conditions of high temperature.
Typical Values
Standard / Unit / COE 601Spec. / Conductive part / Spec. / Non-conductive part
Elastomer / - / - / - / ECE 501 / - / SR-300
Filler / - / - / - / Ag/Al / - / N/A
Electrical Properties
Volume Resistivity / MIL-DTL-83528C / Ohm-cm / ≤0.008 / 0.0067 / - / N/A
Shielding Effectiveness
500M / MIL-DTL-83528C
Para. 4.5.12 / dB / - / 110 / - / N/A
2G / dB / - / 105 / - / N/A
10G / dB / - / 100 / - / N/A
Physical Properties
Hardness / ASTM D2240 / Shore A / 65±5 / 62.7 / 55±5 / 58
Density / ASTM D792 / g/cm3 / 2.2±0.2 / 2.14 / 1.2±0.2 / 1.13
Tensile Strength / ASTM D412 / PSI / ≥180 / 205.1 / ≥900 / 1147
Elongation / ASTM D412 / % / ≥150 / 190 / ≥300 / 525
Tear Strength / ASTM D624 / PPI / ≥30 / 46.15 / ≥60 / 159
Reliability Properties
Compression Set / ASTM D395-B / % / ≤30 / 20.9 / ≤30 / 12.1
Static Compression-Deflection
At 20% compression / QA-WI-FIP-003 / N/cm / 11
At 40% compression / N/cm / 20
Temperature Range
Temperature Range / ASTM D1329 / ℃ / -55~+170
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