Virgin Fine Cut – PN-40, PN-20
Fluoroplast-4 GOST 10007-80
Fluoroplast-4PN-90 TU 2213-021-13693708-2005
Fluoroplast-4PN-40 TU 2213-021-13693708-2005
Fluoroplast-4PN-20 TU 2213-021-13693708-2005
(-CF2-CF2-)n
Analogs: Teflon 7, Fluon G 163, 190, Algoflon F, Hostaflon TF 1702, Polyflon M 12, 14
It is an easily-lumping white powder with no visible inclusions.
Depending average particles size several grades of PTFE are produced:
| Property | Grade | |||
| F-4 (S, P, PN, O, T) | F-4PN-90 | F-4PN-40 | F-4PN-20 | |
| Appearance | Easily -lumping white powder with no visible inclusions | |||
| Moisture content, %, max | 0,02 | 0,02 | 0,02 | 0,02 |
| Density, g/cm3, max | 2,18-2,21 (depending on grade) | 2,19 | 2,19 | 2,19 |
| Tensile strength of unhardened specimen, MPa (kgf/cm2), min | 26 (260) – 15 (150)
(depending on grade) |
25 (255) | 25 (255) | 25 (255) |
| Elongation at break unhardened specimen, %, min | 350 – 150
(depending on grade) |
350 | 350 | 350 |
| Dielectric strength, kV/mm, min | 50 – 60
(depending on grade) |
– | 60 | 60 |
| Average particles size, µm | 100-180 | 46-135 | 21-45 | 6-20 |