glass wool
fibre
Also known as: fibreglass wool
Quick Summary
Glass wool, also known as fiberglass, is made from extremely thin glass fibers. It is primarily used for thermal insulation and as an air filter.1
Production Methods
There are two main methods for producing glass fibers:
- For insulation: Molten glass is dropped into a spinning cup with holes. Centrifugal force extrudes the glass into fibers, which are then broken into short lengths by an air blast. An adhesive spray bonds these fibers together as they fall onto a moving belt, forming wool-like material.2
- For continuous filaments: Liquid glass is fed into a bushing with many fine nozzles. The streams of liquid glass solidify into fine fibers as they are pulled mechanically at high speeds. These fibers can be gathered into strands, twisted into yarns, or woven into fabrics.3
Uses and Dangers
Glass wool is an excellent sound absorbent and thermal insulator, commonly found in buildings and appliances. It also adds strength to plastics, used in boat hulls and car parts. However, direct exposure to raw fiberglass can cause skin and respiratory irritation.3
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