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close this bookAsbestos Overview and Handling Recommendations (GTZ, 1996)
close this folderPart III. Asbestos substitutes
close this folder3 Fiber substitutes for Asbestos fibers in the building area
View the document(introduction...)
View the document3.1 Non-textile fibers made of glass wool rock wool and mineral wool as well as ceramic wools
View the document3.2 Wollastonite
View the document3.3 Cellulose fibers
View the document3.4 Polyacrylnitril
View the document3.5 Polyvinylalcohol (PVA)
View the document3.6 Polypropylene (PP)
View the document3. 7 Summary

3.2 Wollastonite

The inorganic natural fiber wollastonite is a calcium metasilicate with a chain structure consisting of at least 96.5 % CaO and SiO2. The fiber diameter ranges from 10 pm to 100 pm; under mechanical wear a fracturing into fibrous pieces with diameters as small as 0.1 pm is possible. Critical diameter ranges can be prevented through the use of appropriate production methods, however.

Wollastonite is used as filling material in the areas of fire protection (sheets), thermal and electrical insulation (sheets, fill for moulding material), friction linings, structural elements and other construction products, chemical products and others (paints, glues and moulding material).