Blowable glass fiber thermal insulation product
A process and apparatus for manufacturing a blowable glass fiber insulation product is disclosed. The product resulting from the process and apparatus is also disclosed. This process includes the steps of cutting unbonded glass fiber matting and lengths of twisted glass fiber yarn raw material into predetermined relatively large size pieces. The pieces are mixed together and the mixture is fluffed to decrease its density. The mixture is then hammermilled into relatively smaller size pieces suitable for use as blowable insulation. In accordance with the apparatus according to this invention, a cutter cuts glass fiber matting and lengths of twisted glass fiber yarn into relatively large size pieces which are mixed and then fluffed and further cut in a fluffer. A hammermill is used for reducing the mixture into relatively smaller size pieces suitable for use as blowable insulation. The blowable insulation product comprises loose, irregularly formed and separate clumps of glass fiber material approximately one inch (215 cm.) in diameter and having a density of 1 lb./cu./ft. (16 kg./cu./m.) and has a thermal resistance value of 3.3 per inch (2.5 cm.) of thickness.
- Assignee:
- Spittle Industries Inc.
- Patent Number(s):
- US 4476185
- OSTI ID:
- 6108295
- Resource Relation:
- Patent File Date: Filed date 30 Aug 1982; Other Information: PAT-APPL-412533
- Country of Publication:
- United States
- Language:
- English
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