Production process
Raw material preparation
The main raw material is natural wood pulp (i.e. high-purity cellulose), the quality of which directly affects the final performance of acetate fiber. Generally, coniferous wood or hardwood is used as the source to make dissolving pulp with high α-cellulose content.
01
Esterification reaction
Cellulose is reacted with acetic anhydride and acetic acid, and esterified under the action of a catalyst (such as sulfuric acid) to produce cellulose diacetate (CA).
02
Dissolution and filtration
The esterified cellulose acetate is dissolved in a mixed solvent such as acetic acid and acetone to form a uniform and viscous spinning solution. The solution is purified by filtration.
03
Dry spinning
The spinning solution is ejected through the spinneret, and the solvent evaporates quickly when it encounters hot air, solidifying into filaments. After the filaments are collected, they are oiled, dried, and shaped.
04
Tow stretching and packaging
The formed tow is stretched to different degrees according to the purpose to improve strength and uniformity. Finally, it is rolled and packaged according to specifications to become industrial tow products.
05
Product Performance
Physical properties
White color, soft luster
Uniform wire diameter, low twist or no twist
Density is about 1.3 g/cm³
Moderate tensile strength, good flexibility
Chemical properties
Resistant to weak acids and alkalis, excellent light resistance
Insoluble in water at room temperature, but can absorb moisture and expand
Degradable, environmentally friendly
Processing performance
Good thermoplasticity, suitable for thermoforming and hot pressing bonding
Can be used in combination with plastic fibers, activated carbon, and natural fibers
Good dyeing performance, bright colors, high fastness
Main application areas
Cigarette filters (main application)
Currently, more than 90% of the world's acetate fiber tow is used in the manufacture of cigarette filters. The filter is formed by pleating or interweaving the tow bands and gluing them into a cigarette filter core with a tight structure and good filtering effect.
01
Textile fabrics
After some of the tows are cut into short fibers, they can be spun into yarns for use in clothing, underwear, home textiles, etc. They have a silk-like luster and softness, and are especially suitable for high-end fabrics.
02
Medical supplies
Due to its good biocompatibility and degradability, acetate fiber tow is also used in medical gauze, dressings, masks and other sanitary materials.
03
Industrial filter materials
Can be processed into various filter felts or membrane materials, used for filtering and treating particles, oil mist, etc. in purifying water, air and industrial gases.
04
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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