PTFE sheet

ITEMS

PTFE

DENSITYρ(g/cm3)

2.14﹤ρ≦2.20

TENSILE STRENGTH(MPa)

≥30

ELONGATION(%)

≥300

BALL INDENTATION HARDNESS(H132/60)

23≦H≦33

MODULUS OF ELASTICITY

480≦Et≦720

SLIDING FRICTION COEFFICIENT WITH STAINLESS STEEL SHEET UNDER 5201-2 SILICONE GREASE LUBRICATION CONDITION

INITIAL STATIC FRICTION COEFFICIENT（μ）

RELATIVE SLIDING SPEED (mm/s)

0.4

TEMPERATURE（℃）

21±2

≦0.012

0±2

≦0.018

﹣35±2

≦0.035

COEFFICIENT OF DYNAMIC FRICTION（μ）

RELATIVE SLIDING SPEED (mm/s)

8

TEMPERATURE（℃）

21±2

≦0.005

0±2

≦0.012

﹣35±2

≦0.025

LINE WEAR RATE WHEN RUBBING AGAINST STAINLESS STEEL SHEET UNDER 5201-2 SILICONE GREASE LUBRICATION

COMPRESSIVE STRESS（MPa）

30

TEMPERATURE（℃）

21±2

RELATIVE SLIDING SPEED（mm/s)

8

RECIPROCAL SLIDING DISTANCE（mm)

±10

CUMULATIVE SLIDING DISTANCE（km）

1

LINE ABRASION(μm/km)

≦15

LOAD COMPRESSION DEFORMATION

AVERAGE COMPRESSIVE STRESS(MPa)

60

TEMPERATURE（℃）

35±2

HOLDING TIME(h)

48

COMPRESSION DEFORMATION(mm)

≦0.0005h

THE h REPRESENTS THE INITIAL EXPOST HIGHT

FOR THICKNESS OF BOARD GREATER THAN TWO MILIMETERS, TENSILE STRENGTH AND ELONGATION OF SPECIMEN MADE BY TURNING OF PREPARING METHOD SHOULD NOT BE LESS THAN 90% OF THE SPECIFIED VALUE IN THE TABLE