Acetate tow (also known as cellulose acetate tow) is an important chemical material mainly used in the manufacture of cigarette filters, textiles, plastic products, etc. Its raw materials mainly include the following categories:

1. Main raw materials

cellulose

Usually derived from wood pulp (such as cotton short fibers, wood pulp), it is the basic raw material for acetate tow. After chemical treatment, cellulose reacts with acetic anhydride to produce cellulose acetate.

Acetic anhydride

Used for acetylation reaction, converting hydroxyl groups in cellulose into acetyl groups to form cellulose acetate.

glacial acetic acid

As a reaction medium and solvent, participate in the acetylation process.

Sulfuric acid or other catalysts

Used for catalyzing acetylation reactions.

2. Auxiliary materials and additives

plasticizer

Such as triacetin glycerol ester, used to enhance the flexibility and plasticity of fiber bundles.

solvent

Acetone or other organic solvents are used to dissolve cellulose acetate and facilitate spinning.

stabilizer

Prevent the degradation of cellulose acetate during processing.

Extinguishing agent (such as titanium dioxide)

Used to adjust the glossiness of the fiber bundle.

3. Key points of production process

Pre treatment: Drying and activating cellulose.

Acetylation: Cellulose reacts with acetic anhydride under the action of a catalyst to produce cellulose triacetate.

Hydrolysis: Partial acetyl hydrolysis to obtain cellulose acetate with the desired degree of acetylation.

Precipitation and washing: Separate the product, remove residual acid and catalyst.

Spinning: Dissolve cellulose acetate in acetone, extrude it through a spinneret, and solidify it with hot air to form a fiber bundle.

4. Application Fields

Cigarette filter (main use, accounting for more than 80%)

Textiles (such as acetate satin, lining fabric, etc.)

Plastic products such as films, eyeglass frames, toys, etc