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Fiberglass Glossary
Includes the most important technical terms regarding glass fiber products, their production process and their applications
D
D-glass
Glass composition with higher dielectric characteristics than E-glass, used in the manufacture of radomes, electromagnetic windows and high performance printed circuit boards.
Desized product
Product (yarn, fabric, etc.) from which the size has been removed, for example, by extraction with suitable solvents or by thermal treatment (according to ISO/DIS 13922).
Direct roving
A large and predetermined number of filaments obtained by winding directly from a bushing (according to ISO/DIS 13922).
E
E-glass
A calcium alumino-borosilicate glass containing less than 1% of alkali oxide when calculated as Na2O.
End
Term used to describe warp yarns.
Entering
Operation that consists of threading warp yarns from the loom beam through the heddles of the harness shaft and then through the reed blade to achieve the desired design.
F
Fabric
A planar structure composed of textile products.
Fabric construction
Number of yarns per centimeter length in the warp and weft directions, possibly extended to the weave pattern (according to ISO/DIS 13922).
Felt
A textile structure characterized by interlocking and consolidation of its constituent fibers, achieved by the interaction of a suitable combination of mechanical energy, chemical action, moisture and heat, but without the use of weaving, knitting, stitching, thermal bonding or adhesives (according to ASTM D 2475).
Fiber
A generic term designating a unit of matter characterized by a high ratio of length to thickness or diameter (according to ISO/DIS 13922).
Filament
A single textile element of small diameter compared to its length; it can be continuous or discontinuous (according to ISO/DIS 13922).
Filling
Yarn running crosswise to the warp in a fabric (also known as fill, pick, weft).
Finish
A treatment applied to fabric to improve the adhesion with a resin matrix.
Fuzz
Protuberance of broken filaments on the surface of fabric or yarn (also known as fluff).
Fuzz ball
Accumulation of free broken filaments in fabric or yarn structure.