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Dongguan Hanwei Technology Co., Ltd. is a high-tech enterprise integrating R&D, production and sales. Its products are mainly used in petrochemical, rubber and plastics, coatings, papermaking and other fields. The main products are zinc stearate , calcium stearate , magnesium stearate , other fatty acid salts, fatty acid esters, water-based zinc stearate, water-based calcium stearate, wood-plastic lubricants, PE wax, wax emulsion and Various rubber additives, etc.
Characteristics of Calcium Stearate
Calcium stearate possesses specific characteristics that contribute to its functionality and versatility. It is a white, odorless, and fine powder with good dispersibility. It is insoluble in water but soluble in organic solvents. Calcium stearate has a high melting point, providing thermal stability in high-temperature processes. Furthermore, it exhibits excellent lubrication, release, and anti-caking properties. These characteristics make calcium stearate suitable for various applications across different industries.
Types of Calcium Stearate
Calcium stearate is available in different forms to suit specific applications. These include powdered calcium stearate, granular calcium stearate, and water-based calcium stearate. Powdered calcium stearate is widely used as an additive in various powdered products, while granular calcium stearate offers better flowability and handling characteristics. Water-based calcium stearate, on the other hand, provides a sustainable and eco-friendly option for certain applications, as it is free from organic solvents.
Functions of Calcium Stearate
Calcium stearate serves multiple functions in different applications. Primarily, it functions as a lubricant, reducing friction and improving the flow properties of materials during processing. It also acts as a release agent, preventing materials from sticking to molds or equipment surfaces. Furthermore, calcium stearate functions as a stabilizer, enhancing the heat resistance and durability of materials. Additionally, it serves as an anti-caking agent, preventing the formation of clumps and ensuring consistent flow and accurate dosing of powdered substances.
Process Flow of Calcium Stearate Production
The production process of calcium stearate involves several steps. It typically begins with the neutralization reaction between stearic acid and calcium hydroxide, resulting in the formation of calcium stearate and water. This reaction takes place in a reactor under controlled conditions of temperature and agitation. The resulting mixture is then subjected to filtration or centrifugation to separate the solid calcium stearate from the liquid phase. The obtained calcium stearate is then washed and dried to remove impurities and residual water. After drying, the product is typically pulverized or granulated to achieve the desired particle size and flow properties.
Frequently Asked Question
Do you have any question?
Calcium stearate is considered safe for use in food products and is approved by regulatory authorities such as the U.S. Food and Drug Administration (FDA) as a food additive. It is commonly used as an anticaking agent, emulsifier, and stabilizer in various food applications.
Yes, calcium stearate is widely used in the pharmaceutical industry. It is commonly employed as a lubricant and flow agent in tablet and capsule formulations. Calcium stearate helps improve the flowability of powders, aids in tablet compression, and prevents sticking during manufacturing processes. It is generally recognized as safe for pharmaceutical use when used within recommended limits.
Calcium stearate is commonly used as a processing aid in plastics manufacturing. It acts as a lubricant and internal/external release agent, helping to reduce friction and improve the flow properties of plastic materials during processing. It facilitates mold release, reduces sticking, and enhances the surface finish of molded plastic products.
Calcium stearate itself is not considered harmful to the environment. It is biodegradable and does not persist in the environment.