Industrial cellulose acetate powder (CA powder) is the core raw material for producing cellulose acetate sheets (CA sheets), mainly cellulose acetate (CA/2CA), supplied in white powder/fine particle form, used for transparent/colored sheets such as eyeglass frames, jewelry, tool handles, etc.

1、 Basic Attributes (Board Level)

Chemical classification: Cellulose Diacetate (2CA)

CAS number: 9004-35-7

Substitution degree (DS): 2.2~2.5 (combined with acetic acid 54~56%)

Appearance: White/slightly yellow, odorless, fine powder/dust-free particles

Particle size: 100~250 μ m (over 80%) for board specific use

Solubility: soluble in organic solvents such as acetone, dichloromethane, chloroform, etc

Thermal performance: softening~160~180 ° C, decomposition~230~300 ° C

Density: 1.3~1.32 g/cm ³

2、 Production process (raw materials → powder)

Raw materials: high-purity wood pulp/cotton pulp

Acetylation: Acetic anhydride+acetic acid+sulfuric acid catalyst → Cellulose triacetate

Hydrolysis: Control hydrolysis → Cellulose Diacetate (DS 2.2~2.5)

Sedimentation, washing, drying

Crushing/Grading: 50-400 μ m powder (preferably 250-280 μ m for sheet grade)

3、 Key indicators of board grade powder

Viscosity (viscosity/degree of polymerization)

Low viscosity (LVI): Spinning (smoke bundle)

Medium/high viscosity (TX, NC, CA-398-30, etc.) → Board specific

High viscosity → higher strength, toughness, and transparency of the board

Combined with acetic acid: 54.5~55.5% (2CA standard)

Moisture content: ≤ 2-3% (stable during processing)

Ash content, iron, impurities: extremely low (ensuring transparency and absence of crystal points)

Thermal stability: less prone to yellowing during processing

4、 Powder → Cellulose Acetate Board (Process)

mixed allocation

CA powder+plasticizer (DEP, DOP, citrate ester, etc.)

Stabilizers, UV resistance, coloring agents

Kneading/Aging: Powder absorbs plasticizers → Dense clusters

Filtering: Removing impurities (ensuring transparency)

Extrusion/Rolling: Heating plasticization → Continuous sheet metal

Cooling, shaping, surface treatment, cutting

5、 CA board performance (from powder quality)

High transparency, good gloss, easy to dye, high-end texture

Good toughness, impact resistance, and non fragility (better than ordinary plastics)

Resistant to grease, weak acid and alkali, and gasoline

Good processability: cutting, grinding, polishing, bonding

Biodegradable and renewable raw materials

6、 Main application (CA board)

Glasses frame (largest market)

Accessories, buttons, handicrafts

Tool handle, pen holder, luggage accessories

High end packaging and display panels

Instrument components, shatter resistant glass replacement

7、 Common morphological differences

Powder: fast mixing, uniform absorption → mainstream of the board

Flake: commonly used in spinning; It can also be crushed and made into sheets

Particles: Pre mixed and directly extruded