Belting Glossary

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There are 63 names in this directory beginning with the letter F.
Fabric
A planar structure produced by nonwoven or interwoven yarns, fibers, or filaments.

Fabric count
The number of warp ends per inch and the number of filling picks per inch.

Fabric design
The combination of size and numbers of fibers or yarns, in both warp and filling, and the manner in which they are processed.

Fabric finish
See fabric impression.

Fabric impression
A pattern in the cover of a belt formed by contact with a fabric during processing.

Fabric picks/inch
The number of filling (weft) yarns per inch.

Fabric rating
The maximum tension per ply of fabric a belt should be operated under ideal conditions.

Face
The outer surface of a pulley or belt.

Face cover
See top cover.

Fastener
See belt fastener.

Fatigue
The weakening or deterioration of a material caused by a repetition of stress or strain.

Feeder belt
A belt that discharges material onto another conveyor belt.

Fiber
A unit of matter having a length at least 100 times its diameter and which can be spun into a yarn.

Filament
A continuous fiber of extreme length.

Filler
A material mixed with a polymer to improve quality or lower cost of a compound.

Filler seam
Extruded polymeric compound used to fill the void between two pieces of belt cover or fabric.

Filling threads
The yarns in a fabric running at right angle to the warp.

Filling yarns
The transverse yarns in a fabric.

Film
A sheet of plastic not greater then 0.010" in thickness.

Finger splice
Belt ends cut into mating fingers.

Finger tipping tool
Equipment similar to a sodering iron to fix fingers of a thermoplastic belt splice in place prior of putting the belt into a watercooled press.

Finish, fabric
See fabric impression.

Finish, plate
See plate finish.

Finish, platen
See platen finish.

Fire resistance
See flame retardance.

Fire resistant
Retards the burning action of fire or flame.

Fisheye
A small globule that has not blended completely into the surrounding material.

Flame performance
The manner in which belting after being ignited will burn and/or self extinguish.

Flame retardance
Intensity of flame diminished by fire retardant ingredient(s) in the plastic compound.

Flame test
A means, under specific condition, for establishing the flame performance of a belt. This will not indicate the performance of the belt in any fire in which the belt may be involved.

Flange
A raised edge on a plastic article.

Flanged edge
In conveyor belting, an edge built up to prevent spillage.

Flanged pulley
A pulley with a raised rim at the edges for the purpose of keeping the belt on the pulley.

Flash
Material protruding from the surface of a molded part, appearing at the mold parting line or mold vent points.

Flat belt
(1) A belt the cross section of which is in the general form of a rectangle; (2) A belt which operates on a smooth flat bed or straight idlers or rollers.

Flat press
A belt finishing press with flat platens, between which the belt is heated and compressed.

Flat spots
Thin spots on a conveyor belt surface stored on a flat surface for a long time.

Flat wire braid
Flattened braided wire, frequently used for armoring the belt.

Fleet
The lateral movement of a conveyor belt to either side of its intended path.

Flex cracking
A surface cracking induced by repeated bending or flexing.

Flex life
The relative ability of a rubber article to withstand dynamic bending stresses.

Flex life test
A laboratory method used to determine the life of a plastic product when subjected to dynamic bending stresses.

Flexibility
The ability to be bent repeatedly without cracking.

Flexing
The bending of a belt.

Flexproof
Term often used for a fingersplice of a thermoplastic belt.

Floating breaker
A leno or cord breaker embedded in a belt cover with a distinct layer of elastomer separating the breaker from the carcass.

Floating idler pulley
See take-up pulley.

Flow crack
A surface imperfection caused by improper flow and failure of a compound to blend with itself during the moulding operation.

Flow line
See flow mark.

Flow mark
A surface imperfection similar to a flow crack, but with a minor depression.

FPM
Abbreviation for "Feet per Minute".

Frequency factor
The duration of time in minutes required for one complete cycle of a conveyor belt.

Friction
(1) The resistance to motion of a belt due to the contact between two surfaces. (2) Improperly used to indicate the bond between two surfaces.

Friction coat
An impregnation of rubber material calendered by friction motion to a fabric so that the material is forced into the weave of the fabric.

Friction pull
See adhesion.

Friction surface
The exposed portion of a belt finished with a layer of impregnated plastic as distinguished from being completely covered with a layer of plastic.

Friction, coefficient of
The ration between the force pressing the surfaces together and the force required to move it.

Friction, static
The force which is required to start a body sliding.

Frictioned fabric
Coated with rubber compound on a friction (uneven speed) calender.

Frosting
Light scattering surface resembling fine crystals.

Full rated tension
See rating.

Fungicide
An agent that destroys fungi or inhibits their growth.

Fusion
An irreversible process during which a PVC compound or platisol undergoes a physical change and becomes a homogeneous mixture by the mutual solvation of the PVC resin and the plasticizer in the compound, as result of heating to an appropriate temperature.