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What is Acetate?
Background |
| Cellulose acetate was first prepared by Paul Schutzenberger in 1865. It took another 29 years before Charles Cross and Edward Bevan patented a process for its manufacture.At about the same time, Little in the US and Bronnert in Germany simultaneously produced cellulose acetate filaments, which were in actual fact cellulose triacetate, which differs in that it is does not easily dissolve on common solvents.In 1904 George Miles found that partially hydrolyse cellulose acetate would dissolve in acetone. Brothers Henri and Camille Dreyfus exploited this fact to make cellulose acetate films and lacquers in 1910. During World War 1, the technology was used for waterproofing and stiffening the fabrics covering aeroplane wings.In 1919, they introduced the first cellulose based yarn to the market, called Celanese |
Commercially, cellulose acetate is made from processed wood pulp. The pulp is processed using acetic anhydride to form acetate flake from which products are made. Coming from wood pulp, means that unlike most man-made fibres, it comes from a renewable resource and is biodegradable. Another technique for producing cellulose acetate involved treating cotton with acetic acid, using sulfuric acid as a catalyst.
Applications(Spectacle Frames)
Early frames for spectacles were cut from sheets of cellulose acetate. While use of cellulose acetate has largely been superseded by injection moulding with more modern thermoplastics, some up-market spectacles are still made in this way. This is most often the case when colour blends/effect cannot be produced by injection moulding. A popular example is the imitation tortoise shell effect.
Metal Unisex (updated 29/6/2010)