Acetate is a semi-synthetic fiber derived from natural fibers (usually from wood or cotton staple fibers) that are processed to form acetate fibers. Its textile components include general lighting, unique comfortable soft texture, textiles for textiles, textiles for production, fragrances, high-quality clothing, customization and other special-purpose products. The main component of acetate fiber is cellulose acetate, and the hydroxyl groups in its structure are replaced by acetyl groups. According to the degree of acetylation, it can be divided into:
Diacetate (secondary acetate): The degree of acetylation is 74%-92%, which is widely used in clothing and home textiles.
Triacetate (primary acetate): The degree of acetylation exceeds 92%, and it is more heat-resistant and suitable for high-end clothing and industrial uses.
Key Features
Silky texture: soft luster, soft touch, often used for imitation silk fabrics.
Excellent drape: makes clothing lines smooth, suitable for making skirts, dresses, etc.
Hypoallergenic: Suitable for sensitive skin and less likely to cause skin irritation.
Moderate hygroscopicity: better hygroscopicity than synthetic fibers, comfortable to wear.
Antistatic property: not easy to absorb dust, reducing the phenomenon of clothes sticking to the skin.
Biodegradable: More environmentally friendly than pure synthetic fibers.
Production process
Raw material preparation
Cellulose extraction: purifying cellulose from wood pulp or cotton linters, removing impurities such as lignin
01
Acetylation reaction: Cellulose is reacted with acetic anhydride in the presence of a catalyst (such as sulfuric acid) to produce cellulose acetate.
02
Spinning molding
Dissolving glue: dissolving cellulose acetate in acetone to form spinning solution.
Dry spinning: the spinning solution is extruded through the spinneret, and the acetone evaporates in hot air to form continuous filaments.
Tow forming: multiple filaments are bundled into a tow, and the fluffiness is increased through the crimping process.
03
Post-processing
Washing and drying: remove residual chemical solvents.
Cut (optional): process into short fibers or directly supply in the form of tows according to demand.
Packaging: package the finished products for use by downstream textile or filter material companies.
04
Performance characteristics
Physical properties
Strength: 1.2–1.4 g/denier, moderate, suitable for textile use.
Elongation: 25–45%, giving the fabric good elasticity.
Density: 1.32 g/cm³, lighter than synthetic fibers such as polyester.
Melting point: about 260°C (triacetate is more heat resistant)
Chemical properties
Solvent resistance: soluble in organic solvents such as acetone and chloroform, resistant to weak acids and weak bases.
Dyeability: easy to dye with disperse dyes, bright colors.
Thermal and electrical properties
Thermal stability: The softening point of diacetate fiber is about 175°C, and that of triacetate fiber can reach over 300°C.
Low thermal conductivity: Good warmth retention, suitable for winter fabrics.
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