The Ester
Acetate fibre: Textile fibres which are composed of ester cellulose are called acetate fibres. Acetate is a manufactured fibre in which the fibre forming substance is cellulose acetate. Where not less than 92% of the hydroxyl groups are acetylated the term tri acetated may be used as a generic description of the fibre. The term acetate is derived from acet and ate. The former comes from acetic acid (The acid of vinegar), whilst the latter denotes a chemical salt. Acetate means a salt of acetic acid. In organic chemistry, a salt is known as an ester. As a result acetate fibres are at times referred to as cellulose ester. There are two types of acetate fibres — I) Acetate II) Triacetate