CROYLAM FR4 EPOXY GLASS SHEET 1220mm x 1220mm

PROPERTIES

ASTM TEST METHOD

UNITS

CONDITION

SPECIFICATION

TEST RESULTS

PHYSICAL PROPERTIES

Specific Gravity

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A

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1.90

Water Absorption (max)

    D229

%

D-24/23

0.8mm – 0.5%

1.2mm – 0.4%

1.6mm – 0.25%

2.4mm - 0.2%

3.0-5.0mm-0.15%

0.8mm– 0.4%

1.2mm – 0.3%

1.6mm – 0.18%

2.4mm – 0.15%

3.0-5.0mm– 0.12%

MECHANICAL PROPERTIES

Tensile Strength LW.

(12mm thick) C.W.

Psi

A

40,000

35,000

42,000

36,000

Impact Strength

A. Izod                 L.W.

(3.2-25mm thick) C.W

    D229

ft-lb/inch (Notch)

A

7.00

5.50

7.8

5.75

Flexural Strength L.W.

(0.8-2.4mm thick) C.W.

D229

Psi

A

55,000

45,000

62,000

53,000

Bonding Strength

(12mm thick)

D229

Lbs

A

D/48/50

2,000

1,600

2,200

1,800

ELECTRICAL PROPERTIES

Minimum Breakdown Voltage

Edge Wise (0.8-25mm)

D229

kV

A

D48/50

45

40

50

45

Electric Strength (perpendicular to lamination) – (1.5mm thick)

D229

kV/mm

In oil at 90°C

15

20

Maximum Permittivity/1 MHz (1.5mm thick)

D229

----

A

D24/23

5.20

5.40

5.12

5.25

PROPERTIES

ASTM

TEST

METHOD

UNITS

CONDITION

SPECIFI-

CATION

TEST

RESULTS

Insulation Resistance after (Immersion in water for 24 hours)

D229

MΩ

C-96/35/90

200,000

300,000

Maximum Dissipation

Factor/MHZ (1.5mm thick)

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---

A

D-24/23

0.025

0.035

0.02

0.03

THERMAL PROPERTIES

Temperature Index

VDE 0304/2

°C

--

130

130

Insulating class

IEC Publ.85

°C

--

B

B

Flammability

UL94

Class

A

V0

V0

Martens heat distortion temperature

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Deg/C

A

160

160

GLASS FABRIC DETAILS

Fine weave Glass Fabric Style 7628

GSM

--

--

--

200+/-5

OK

Thickness

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--

--

0.18mm

OK

Weave Structure

Yarn count per 10 cm

Wrap (length wise) x weft (cross wise)

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--

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170 x 120

OK