Datasheet

92
www.lairdtech.com
93
www.lairdtech.com
EMI ESSENTIALSEMI ESSENTIALS
GEMINI
™
COEXTRUSIONS
MULTI-EXTRUSION, BI-FUNCTIONAL
ELASTOMER GASKET
Laird Gemini™ product line is a high-performance gasket
solution that combines a reliable environmental silicone
elastomer seal with an electrically conductive elastomer.
Conductive particle ller results in a product with lower
material cost and an improved environmental seal against
water, moisture, dust and mildly corrosive atmospheric conditions
due to smog.
Our conductive extrusions offer a wide choice of proles to t
a large range of applications. The cross-sections shown on the
following pages are offered as standard. Custom dies can be
built to accommodate your specic design.
FEATURES
• Combines the strength of silicone rubber with
Laird proprietary conductive elastomer
EMI shielding materials and knowledge
• Improved environmental seal
• Improved EMI performance over lifetime
• Cost-effective
• Available in both standard and custom proles
• Ability to use nite element analysis to design
the best custom gasket for your application
MARKETS
• Wireless infrastructure
• Remote radio units
• Telecom cabinets
• Radar
• IT cabinets
• All electronic cabinets or electronic chassis that require
both an environmental seal and EMI shielding
NAME OF MATERIAL TEST METHOD
NONCONDUCTIVE ELASTOMER CONDUCTIVE ELASTOMER TYPICAL CO-GASKET DESIGN
NCE220 NCE221 ECE93 ECE81A
NCE220/ECE93,
CO-ECE
NCE221/
ECE81A, CO-ECE
Polymer matrix Silicone rubber Silicone rubber Silicone rubber Silicone rubber Silicone rubber
Silicone rubber
Filler Alumina NA
Nickel/graphite
(Ni/C)
Ag/Al
Compound
Alumina/Ni/C
Ag/Al
Compound
Flammability UL94
le E203070
HB V1(Pending) HB Not tested HB
V1(Pending)
Color
visual
Blue Orange Black Tan Black & Blue
Tan & Orange
Hardness
ASTM D2240
70 Shore A 60 Shore A 55 Shore A 65 Shore A NA
NA
Specic gravity
ASTM D792
1.2 1.5 1.9 1.9 NA
NA
Tensile strength
ASTM D412
(modied)
2.8 MPa 3.4 MPa 1.0 MPa 1.7 MPa NA
NA
Tear strength
GB/T529-91
(modied)
60 ppi, min 30 ppi, min
30 ppi, min
NA
NA
Elongation to break
ASTM D412
100 to 400% 300% ,min 100 to 300% 100 to 300% 100 to 300%
300% ,min
Working
temperature range
ASTMJ D1329
-50 to 150°C -50 to 150°C -50 to 150°C -50 to 150°C -50 to 150°C
-50 to 150°C
Environmental
EU directive
94/62/EC, Dec
20, 1994
RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant
RoHS Compliant
Volume resistivity
(max value)
MIL-DTL-83528C
(PARA 4.5.10)
Insulator Insulator 0.100 ohm-cm 0.006 ohm-cm NA
NA
Aging volume resistivity
(max value)
Laird aging test -
MIL-DTL-83528C
(PARA 4.5.10)
Insulator Insulator <0.2 ohm-cm <0.015 ohm-cm NA
NA
Mold growth
ASTM G21
0 Not Tested 2 Not Tested NA Not Tested
Shielding effectiveness (dB)*
100 MHz (E-eld)
MIL-DTL-83528C
(PARA 4.5.12)
MIL-STD 285
NA NA 100 dB 100 dB 90 dB 100 dB
500 MHz (E-eld) NA NA 100 dB 100 dB 90 dB 100 dB
2 GHz (Plane Wave) NA NA 100 dB 100 dB 80 dB 95 dB
10 GHz (Plane Wave) NA NA 100 dB
100 dB
80 dB
90 dB
Adhesive available upon request for ease of installation
P-Strips
MIL-DTL-83528
PART NUMBER
PART NUMBER
DIMENSIONS
A B C D
8867-0136 0.275 (7,0) 0.140 (3,6) 0.085 (2,2) 0.030 (0,8)
8867-0147 0.290 (7,4) 0.095 (2,4) 0.062 (1,6) 0.025 (0,6)
8867-0144 0.390 (9,9) 0.200 (5,1) 0.103 (2,6) 0.062 (1,6)
8867-0128 0.415 (10,5) 0.200 (5,1) 0.060 (1,5) 0.062 (1,6)
8867-0141 0.425 (10,8) 0.250 (6,4) 0.151 (3,8) 0.050 (1,3)
M83528/008X007 8867-0101 0.475 (12,1) 0.200 (5,1) 0.080 (2,0) 0.062 (1,6)
8867-0127 0.500 (12,7) 0.200 (5,1) 0.076 (1,9) 0.062 (1,6)
M83528/008X002 8867-0105 0.500 (12,7) 0.250 (6,4) 0.125 (3,2) 0.062 (1,6)
8867-0126 0.600 (15,2) 0.250 (6,4) 0.125 (3,2) 0.062 (1,6)
M83528/008X004 8867-0102 0.640 (16,3) 0.208 (5,3) 0.080 (2,0) 0.072 (1,8)
8867-0158 0.752 (19,1) 0.252 (6,4) 0.189 (4,8) 0.063 (1,6)
8867-0165 0.752 (19,1) 0.437 (11,1) 0.347 (8,8) 0.060 (1,5)
M83528/008X006 8867-0130 0.780 (19,8) 0.360 (9,1) 0.255 (6,5) 0.070 (1,8)
M83528/008X001 8867-0100 0.850 (21,6) 0.200 (5,1) 0.080 (2,0) 0.062 (1,6)
8867-0166 0.874 (22,2) 0.500 (12,7) 0.400 (10,2) 0.065 (1,7)
M83528/008X005 8867-0125 0.875 (22,2) 0.312 (7,9) 0.187 (4,8) 0.062 (1,6)
TOLERANCES ALL PROFILES
DIMENSIONS TOLERANCE
Under 0.101 (2,6) ± 0.005 (0,15)
0.101 to 0.200 (2,6 to 5,1) ± 0.008 (0,2)
0.201 to 0.300 (5,1 to 7,6) ± 0.010 (0,3)
0.301 to 0.500 (7,6 to 12,7) ± 0.015 (0,4)
Over 0.500 (12,7) ± 0.020 (0,5)
EXTRUSIONS GUIDE