Glass wool

This article is about the thermal insulation material composed of glass fibers bonded loosely in a way to trap air. For the plastic composite of glass fiber and polymer plastic used as structural reinforcement, see fiberglass. For the glass fiber itself, also sometimes called fiberglass, see glass fiber.
Glass wool batt insulation

Glass wool is an insulating material made from glass fiber arranged using a binder into a texture similar to wool. The process traps many small pockets of air between the glass, and these small air pockets result in high thermal insulation properties. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated. The modern method for producing glass wool was invented by Games Slayter while he was working at the Owens-Illinois Glass Co. (Toledo, Ohio). He first applied for a patent for a new process to make glass wool in 1933.[1]

  1. ^ US Patent Number 2133235: Method & Apparatus for Making Glass Wool[dead link‍] First Slayter glass wool patent, 1933.