Production process
Raw materials
The main raw material of acetate tow is high-purity natural cellulose, usually obtained from wood pulp
Esterification reaction
Wood pulp fiber undergoes esterification reaction with acetic anhydride, acetic acid, etc. under the action of catalysts to produce triacetate cellulose
Partial hydrolysis
Cellulose triacetate is partially hydrolyzed to cellulose diacetate to improve its solubility and spinning performance.
Dissolution and Filtration
Use acetone solvent to dissolve cellulose diacetate to form a uniform spinning solution, which is then filtered through multiple stages to remove impurities.
Dry spinning (dry spinning)
The spinning solution is extruded into a high-temperature airflow through dry spinning equipment to evaporate the solvent and form the fiber.
Tow Drafting and Crimping
The fibers are drafted to increase strength and mechanically crimped to increase volume and softness.
Drying and oiling
Dry the tow and add an appropriate amount of oiling agent to reduce static electricity and improve processing performance.
Packaging finished products
The tow is cut, compressed, and packaged into certain specifications and exported as a commodity.
Physical properties
Wide range of linear density: the tow can be made into different linear densities as required, such as 2.5Y, 3.0Y, 3.3Y, etc.
Good length consistency: precise drafting and cutting control ensures uniform fiber length;
Stable curl: using thermomechanical curling to maintain high elasticity;
Soft luster: The surface is smooth and has a silky luster;
Comfortable touch: The fiber is delicate and soft, and has good skin-friendliness;
Moderate hygroscopicity: Although slightly lower than regenerated cellulose, it is still better than synthetic fibers;
Good thermoplasticity: suitable for hot pressing and post-processing
Chemical properties
Strong light resistance: more stable than viscose fiber, not easy to turn yellow under sunlight;
Good heat resistance: can be thermoformed within a certain temperature range;
Strong solvent resistance: insoluble in most aqueous solutions, but soluble in acetone and chloroform;
Strong dyeability: easy to color and can adapt to a variety of dyes
Hebei Changhong Technology Co., Ltd. is a foreign trade company specializing in the import and export of chemical products, headquartered in Shijiazhuang, Hebei, China. We focus on the global supply of chemicals.
Adhering to the business philosophy of "quality first, customer first", the company has established long-term strategic cooperation with high-quality manufacturers at home and abroad, and has a professional international trade team, providing efficient logistics, customized packaging, technical consulting and other full-service, helping customers expand the global market.
Core advantages:
✅ Stable supply - direct connection to the factory to ensure the supply
✅ Strict quality inspection - ensure quality
✅ Global network - covering Asia, Europe, America and other markets
✅ Professional service - multi-language support, fast response
Hebei Changhong Technology is committed to becoming a trusted chemical partner for global customers, looking forward to working with you for a win-win situation!
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