ype html>

fibreglass | glass | Britannica

fibreglass

glass
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work!
Print
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work!
Alternate titles: fiberglass, fibre glass, glass fibre, spun glass

fibreglass
Key People:
Jean Dubuffet
Related Topics:
glass glass wool

fibreglass, also spelled Fiberglass, also called Glass Fibre, fibrous form of glass that is used principally as insulation and as a reinforcing agent in plastics.

Glass fibres were little more than a novelty until the 1930s, when their thermal and electrical insulating properties were appreciated and methods for producing continuous glass filaments were developed. Modern manufacture begins with liquid glass obtained directly from a glass-melting furnace or from the remelting of preformed glass marbles. For producing continuous fibre, the liquid is fed into a bushing, a receptacle that is pierced with hundreds of fine nozzles through which the liquid issues in fine streams. The solidifying streams are gathered into a single strand, which is wound onto a spool. Strands can be twisted or plied into yarns, woven into fabrics, or chopped into short pieces and then bonded into mats. Discontinuous fibres are most often made in a rotary process, in which fine streams of glass are flung outward through holes in a spinning dish and are then broken and blown downward by a blast of air or steam. The fibres collect on a moving conveyor and are formed into wools, mats, or boards.

Read More on This Topic industrial glass: Fibreglass Glass-fibre wool for insulation is usually produced by allowing a molten glass stream to drop into a spinning cup that has numerous holes...

Fibreglass wool, an excellent sound and thermal insulator, is commonly used in buildings, appliances, and plumbing. Glass filaments and yarns add strength and electrical resistivity to molded plastic products, such as pleasure boat hulls, automobile body parts, and housings for a variety of electronic consumer products. Glass fabrics are used as electrical insulators and as reinforcing belts in automobile tires.

This article was most recently revised and updated by Amy Tikkanen.