Product: High-viscosity CMC (CMC-HVT)
Grade: Technical-Grade
Prouduct Description:
Technical-grade high-viscosity carboxymethyl cellulose (CMC-HVT) is an alkali metal salt of carboxymethyl cellulose. The manufacturer shall maintain documentation of the anaysis of the cellulosic raw material used.
The product is a free-flowing or granulated powder and is not normally purified of by-products formed in the reaction.
Product Physical Requirements:
CMC-HVT shall be deemed to meet the requirements of this internatinal standard if a composite sample representing no more than one day's production conforms to the physical specifications of Table 14, represents the product produced and is controlled by the manufacturer.
Technical Requirements:
Product Rejection
CMC-HVT shall be free from any starch or starch derivatives. Therefore, a qualitative starch determination shall be performed before proceeding with the CMC-HVT performance testing. If starch is found, no further testing should be performed and sample shall be rejected.
Table 14 - CMC HVT Physical specifications
Item | Quality specification | ||
Exterior | White and Yellowish powder | ||
Presence of starch or starch derivatives | Absent | ||
Moisture Content, % | ≤ 8.0 | ||
D.S. Corrected for Moisture and Salt | ≥ 0.8 | ||
pH value(1%, 25℃) | 6.5-8.0 | ||
Viscometer dial reading at 600r/min | In deionized water | ≥ 30 | |
In 40g/l salt solution | ≥ 30 | ||
In saturated salt water | ≥ 30 | ||
Apparent viscosity,cP | ≥ 15 | ||
Filtrate volume, millilitres | ≤ 10.0 | ||
Slurry rate, m3/t | In deionized water | 160 | |
In 4% salt solution | 130 | ||
In saturated salt water | 140 | ||
Particle size ( sieving ) (100mesh) | ≥99% | ||
