Extended Service Heights

in both grounding and EMI shielding applications. Gore recommends

using each variant within a range of service heights (gap distances).

For shielding applications, Gore recommends a smaller service height

range than for grounding applications to ensure a robust EMI seal.

The low closure force and broad range of tolerance take-up results in

multiple product choices for some gap distances. Selecting the most

suitable variant for a given application depends on:

1. Gap distance of the housing that needs to be filled

2. Compression force required to achieve the specified gap distance

3. Required DC resistance for grounding applications (or required

shielding effectiveness for shielding applications) at a specified

gap distance

Figure 1 and Figure 2 show recommended service heights (gap

distances) for each variant.

Figure 1: Recommended Service Heights for Use

in EMI Gasket Applications

1

To measure the recovered thickness, samples were compressed to the compression stop. While compressed, the samples were subjected to a 70°C temperature soak for 70 hrs per ASTM

D395B. Lastly, the samples were released from compression and allowed to recover for 30 minutes before the recovered thickness was measured.

Pressure and DC Resistance

Three of the variants among the GS8000 Series provide conductivity

when compressed to 0.6 mm (0.24 in); however, the amount of

pressure and DC resistance varies for each. Table 2 shows the values

for each of these three variants.

Table 2: Pressure and DC Resistance Values

Variants

Pressure Required (psi) DC Resistance (ohms)

GS8000-063

15

0.03

GS8000-095

55

0.02

GS8000-126

75

0.01

Figure 2: Recommended Service Heights for Use

in Grounding Pads

2.40

2.25

2.10

1.95

1.80

1.65

1.50

1.35

1.20

1.05

0.90

0.75

0.60

0.45

0.30

0.15

0.00

GS8000 Series

GS8000-03X

GS8000-063

GS8000-095

GS8000-126

2.20 mm @ 1 psi

1.40 mm

@ 5 psi

0.60 mm @ 75 psi

1.20 mm @ 5 psi

0.85 mm

@ 20 psi

0.50 mm @ 100 psi

0.90 mm @ 5 psi

0.60 mm

@ 15 psi

0.30 mm @ 95 psi

0.45 mm @ 10 psi

0.30 mm

@ 50 psi

0.15 mm @ 325 psi

1.50

1.35

1.20

1.05

0.90

0.75

0.60

0.45

0.30

0.15

0.00

GS8000 Series

GS8000-03X

GS8000-063

GS8000-095

GS8000-126

1.40 mm @ 5 psi

0.60 mm @ 75 psi

0.85 mm @ 20 psi

0.50 mm @ 100 psi

0.60 mm @ 15 psi

0.30 mm @ 95 psi

0.30 mm @ 50 psi

0.15 mm @ 325 psi

GS8000 SERIES — Gaskets

and Grounding Pads

GORE

®

EMI Shielding

MATERIALS

Page 2

Pressure to Achieve

Initial DC

Recovered

Variants

Weight

Compression

Resistance

Thickness

(g)

(psi)

(ohms)

High

0.45 (0.018)

10

0.245

0.56 (0.022)

GS8000-03X

0.008

Recommended

0.30 (0.012)

50

0.125

0.38 (0.015)

Low

0.15 (0.006)

325

0.015

0.25 (0.010)

High

0.90 (0.035)

5

0.070

1.19 (0.047)

GS8000-063

0.010

Recommended

0.60 (0.024)

15

0.025

0.91 (0.036)

Low

0.30 (0.012)

95

0.007

0.51 (0.020)

High

1.20 (0.047)

5

0.115

1.65 (0.065)

GS8000-095

0.011

Recommended

0.85 (0.033)

20

0.040

1.24 (0.049)

Low

0.50 (0.020)

100

0.010

0.74 (0.029)

High

2.20 (0.087)

1

0.240

2.62 (0.103)

GS8000-126

0.013

Recommended

1.40 (0.055)

5

0.150

1.90 (0.075)

Low

0.60 (0.024)

75

0.012

0.94 (0.037)

Compression Stop

mm (in)