Phenolic cotton sheets
Textit J
Sheets are made from cotton fabric as reinforcement and cresol formaldehyde resin as a binder. Good resistance to weak acids. At higher temperature can be used as a construction material in machines and equipment construction. It has good mechanical and sliding properties, absorbs shocks. It is used for the production of sliding bearings, bigger gear wheels, rollers, sliding parts of machines and equipment, damping parts, housing parts, levers, connecting rods, protective discs, insulation pads, facings of sliding parts of presses, heavy planning machines, frame saws. It represents a structural material in the construction of machines working in aggressive environments.
Textit E
Compared to Textit J has better electrical strength and resistance in humid environments. It is suitable for the production of various highly mechanically and electrically stressed parts. Identically to Textit J it is used for electrical components with guaranteed dielectric strength and insulation resistance for electrical insulation boards, chassis, body equipment, housing parts of distribution boards and switchgears, electrical machines and transformers.
| Type according EN-60893 | Unit | PFCC201 | PFCC202 | PFCC203 | |
|---|---|---|---|---|---|
| Used name | Textit J | Textit E | Textit | ||
| Type according to DIN 7735 | Hgw 2082 | Hgw 2082.5 | Hgw 2083 | ||
| Type according to NEMA | C | CE | L | ||
| Reinforcement | cotton fabric | cotton fabric | cotton fabric | ||
| Resin | phenol | phenol | phenol | ||
| MECHANICAL PROPERTIES | |||||
| Flexural strength flatwise perpendicular to laminations (at 20°C) | MPa | 140 | 90 | 160 | |
| Modulus of elasticity in flexure | MPa | 7x103 | 7x103 | 7x103 | |
| Tensile strength | MPa | 80 | 60 | 95 | |
| Compressive strength perpendicular to laminations | MPa | 270 | - | - | |
| Notch impact strength parallel to lamination (Charpy) | KJ/m2 | 9 | 8 | 10 | |
| Shearing strength parallel to laminations | MPa | 60 | 20 | 60 | |
| DIELECTRIC PROPERTIES | |||||
| Dielectric strength perpendicular to layers in oil 90°C | kV/mm | 1 | 5,1 | 1 | |
|
KV | 1 | 20 | 4,6 | |
| Dissipation factor tg | |||||
| - at 50 Hz | - | - | - | ||
| - at 1 MHz | - | - | - | ||
| Permittivity at 1 MHz | - | 5,5 | - | ||
| Comparative tracking index (CTI) | 100 | 150 | 135 | ||
| Insulation resistance after immersion in water | MΩ | 0,1x101 | 1,5x101 | 1,7x101 | |
| PHYSICAL PROPERTIES | |||||
| Density | g/cm3 | 1,3 - 1,4 | 1,3 - 1,4 | 1,3 - 1,4 | |
| Temperature index (TI) | 120 | 120 | 120 | ||
| Water absorption (for thickness 3mm) | mg | 249 | 162 | 135 | |
| Flammability (category) | - | - | - | ||