Good Price Of Good Quality Insulation Pressboard Natural Brown Green Blue Or Red Insulation Presspape Insulating board

Item

Test standard

Measured

Standard value

value

Thickness tolerance

IEC 641-2

±10 %

±10 %

Apparent density

IEC 641-2

1.1 g/cm³

1.0 - 1.2 g/ccm³

Min. tensile strength M.D, unfolded

IEC 641-2

90 N/mm²

80 N/mm²

Min. tensile strength C.M.D, unfolded

IEC 641-2

50 N/mm²

40 N/mm²

Min. elongation M.D, unfolded

IEC 641-2

6.50%

6%

Min. elongation C.M.D, unfolded

IEC 641-2

13%

12%

Max. moisture content

IEC 641-2

8%

8%

Max. ash content

IEC 641-2

0.50%

1%

pH of aqueous extract

IEC 641-2

7~9

6~9

Max. shrinkage M.D

IEC 641-2

0.70%

1%

Max. shrinkage C.M.D

IEC 641-2

1.20%

1.50%

Max. thickness shrinkage

IEC 641-2

5%

7%

Min. oil absorption

IEC 641-2

25%

12%

Min. breakdown voltage in air, unfolded, normalized

IEC 641-2

10 kV/mm

9 kV/mm

Min. breakdown voltage in oil

IEC 641-2

60 kV/mm

40 kV/mm

Measured values determined at 0.2 mm thickness.