WHAT IS CPR?
Ocak 17, 2020HFFR COMPOUNDS IN CABLE INSULATION AND SHEATHING
Ocak 21, 2020THERMOPLASTIC HFFR INSULATION AND SHEATH COMPOUNDS
These compounds are readily formed by heat and can be reshaped when cooled. Recyclable compounds. They are the most preferred compounds in cable sheathing and insulation by extrusion. The working temperature can be up to 90 ° C. Minimum values of the materials required in HFFR compounds are determined by national and international standards. Some of these standards are as follows.
1- EN 50290-2-26 Thermoplastic HFFR insulation compounds for communication, signal control and instrumentation cables; In the communication, signal control and instrumentation cables such as LIYY, PDH, LIYCY, J-H (St) H, PDV to be produced with HFFR insulation, the appropriate compounds in this standard should be used.
2- EN 50290-2-27 Thermoplastic HFFR sheath compounds for communication, signal control, instrumentation and data cables; CAT6 U / UTP with HFFR sheath is used for communication, signal control, data and instrumentation cables such as LSZH, LIHH, LIHCH.
3- TS EN 50363-7 Thermoplastic HFFR insulation compounds for low voltage power and control cables; When producing low voltage and control cables with HFFR insulation, suitable compound should be used in this standard.
4- TS EN 50363-8 Thermoplastic HFFR sheath compounds for low voltage power and control cables; low voltage power and control cable sheathing should be done using appropriate compounds according to this standard.
THERMOSET INSULATION AND SHEATH COMPOUNDS (CROSS-LINKED HFFR)
When producing cross-linked HFFR, it is produced by creating the conditions in XLPE insulation. The operating temperature of the cross-linked HFFR polymers can be up to 125 ° C. The difference from XLPE is that it does not drip during fire thanks to the ATH or MDH filling material incorporated.
BENEFITS
• High chemical resistance.
• High oil resistance.
• High mechanical resistance.
• Electrical and physical properties do not deteriorate during high temperature changes.
• It has high thermal resistance and long life.
Cables produced with HFFR compounds should be used especially in places where toxic and corrosive gases are not desired, where the contribution of cables to fire must be minimized, in harsh working conditions and in environments where there is a fire risk.
