polyanionic cellulose powder

PAC has been widely adopted across all industries where CMC is applicable. It allows for significantly reduced dosage, offers ease of use, delivers superior stability, and meets more demanding process requirements.

These industries include, but are not limited to: oil drilling, ceramic glazes, daily chemical products, synthetic detergents, graphite products, pencil manufacturing, electronics, coatings, construction and building materials, interior decoration, mosquito coils, tobacco, papermaking, rubber, agriculture, and adhesives.

Characteristics of Oil Drilling Grade PAC

Drilling fluids formulated with oil-drilling-grade polyanionic cellulose (PAC) exhibit excellent fluid loss control, shale inhibition, and high resistance to both temperature and salinity. They demonstrate a high rate of viscosity development in freshwater, 4% saline solutions, and saturated brine. When used at a dosage of just 35–40% compared to traditional CMC, PAC provides comparable viscosity enhancement and fluid loss control in freshwater drilling fluids; furthermore, it performs even more effectively in 4% saline and saturated brine drilling fluids—demonstrating superior resistance to high-salinity environments. It is widely utilized in oil drilling operations, and is particularly well-suited for deep wells, high-temperature wells, saline wells, and offshore drilling applications.
 

Polyanionic cellulose serves two primary functions in petroleum drilling operations:

1. Application of Polyanionic Cellulose Powder in Drilling Fluids: It possesses strong cuttings-carrying capacity, inhibits clay dispersion, reduces fluid loss rates, and stabilizes wellbore walls. It exhibits excellent suspending capabilities—particularly in fluids containing high concentrations of solid phases—thereby significantly enhancing particle stability. Furthermore, it demonstrates good tolerance to calcium ions and low sensitivity to salts and potassium, while offering strong resistance to salts, calcium, and magnesium; consequently, it serves effectively as a rheology modifier.

2. Application of Petroleum-Grade PAC in Completion Fluids: It improves the fluidity of cementing fluids; it regulates fluid rheology, thixotropy, and the suspension of solid particles. Additionally, it rapidly increases the viscosity of fracturing fluids, serving as a viable substitute for guar gum.
 

Applications of Polyanionic Cellulose

I. Applications in Oil Drilling
In the oil drilling industry, PAC powder is utilized as a drilling fluid additive. By enhancing the viscosity and suspension properties of the drilling fluid (mud), it effectively stabilizes the wellbore and prevents blowouts as well as the intrusion of formation fluids. Furthermore, thanks to its excellent fluid-loss control capabilities, polyanionic cellulose minimizes the filtration of drilling fluid into the surrounding geological formations, thereby boosting drilling efficiency and reducing operational costs.

II. Applications in the Food Industry
In food manufacturing processes, PAC serves as both a thickening agent and a stabilizer. It significantly improves the viscosity and stability of food products, ensuring that they maintain desirable taste and texture throughout processing and storage. The application of polyanionic cellulose is particularly vital in the production of beverages, dairy products, and baked goods.

III. Applications in the Pharmaceutical Industry
In the pharmaceutical sector, PAC is employed as an excipient in the formulation of tablets, capsules, and granules. It provides excellent binding and disintegration properties, ensuring the controlled release of medications within the body to achieve the intended therapeutic effects. Additionally, polyanionic cellulose can be used as a base material for medicinal ointments and topical coatings, offering superior spreadability and adhesion.

IV. Applications in the Cosmetics Industry
PAC plays a significant role in the cosmetics industry, where it is commonly used as a thickening agent, stabilizer, and suspending agent. In products such as shampoos and body washes, polyanionic cellulose enhances formula stability, thereby improving both product quality and the user experience. Moreover, it boosts the moisturizing properties of cosmetic products, providing consumers with a more comfortable and pleasant sensation during use.