F
30 Posts in this encyclopedia categoryFast Ethernet
Fast data network specified in IEEE 802.3 in 1995. Important parameters: Transmission rate 100 Mbit/s, variable packet length 64 to 1522 bytes (with 4-byte tag field optional). (All data without guarantee)
Fibre optic cable
In contrast to electrical transmission technology, where twisted pair cables, for example, are used for data transmission, optical transmission technology uses glass or plastic as the transmission medium. Optical fibres are available as multimode and single-mode fibres (monomode fibres). (All information without guarantee)
Filler
Used as a component of insulating and sheathing compounds. The fillers used in rubber compounds, for example, directly interfere with the rubber molecules and give them good abrasion resistance. Fillers are mainly silica chalk, carbon black and aluminium oxide. (All information without guarantee)
Filling element
Filler elements are inserted into wires or cables and stranded together to close so-called open points in the bracing. They are usually made of inferior materials such as rayon, cotton, polythene cords etc., but generally have the same dimensions as the real stranding elements. (All information without guarantee)
Fire behaviour or fire properties
Testing according to VDE 0472 T 804 The standard describes the behaviour of cables and wires when exposed to flames. (All data without guarantee)
Flame resistance
Certain materials used for insulation and coats only catch fire with a delay when exposed to heat. They extinguish themselves when the heat source is removed. (All information without guarantee)
Flame retardant
Thermoplastic and elastomer compounds for insulation and jackets are influenced by appropriate additives so that they only catch fire with a delay when exposed to heat. (All information without guarantee)
Flame retardant
A material made of thermoplastic PVC that extinguishes itself after exposure to flame. (All data without guarantee)
Flat cable
Multiple, parallel, individually insulated conductors with a sheath for mechanical protection. The sheath is shaped to produce a rectangular cable cross-section. Used in crane systems, for example.
Flat cables
Flat cables in neoprene or PVC design are used as trailing cables for crane systems, storage and retrieval machines and floor conveyors. They have extremely small bending radii, require little space, are highly flexible and can be packaged.
Flat gasket
In most cases, flat seals are static seals. They are used frequently and for a wide variety of applications. One common application is installation between two flanges. The seal is often inserted into a groove in the flange. In order to achieve a high sealing force, flat gaskets can also be used with modified cross-sections (e.g. diamond-shaped). This allows a higher pressure to be generated locally while maintaining the same pressing pressure and prevents the diffusion of operating fluids.
Flexibility
A cable is flexible if it can be moved back and forth without impairing its functionality (e.g. lift cables or robot cables). (All information without guarantee)
Fluoroethylene propylene (FEP)
Product from the TEFLON® range. A plastic for high temperatures, very good chemical resistance, very good electrical properties but not inexpensive. (All data without guarantee)
Foil screen
Foil shields are used in the high-frequency area of wires and cable production. These shields consist of metal-laminated plastic foils, plastic-laminated metal foils or pure metal foils. The films are either wrapped around the element to be shielded or laid lengthwise around the element in the direction of travel and possibly welded or glued. (All information without guarantee)