PVPk90 (Polyvinylpyrrolidone K90), as a high-olecular-weight water-soluble polymer, is widely used in pharmaceuticals, food, cosmetics, and other fields. Dried with a **vacuum belt dryer**, it the following significant advantages, especially suitable for the processing of heat-sensitive, high-viscosity materials such as PVPk90:
1. Low-temperature drying protecting heat-sensitive materials – Advantages: Under vacuum conditions, the boiling point of water is lowered (usually it can evaporate at 40~60℃, avoiding high temperatures that could cause degradation or discoloration of the PVPk90 molecular chain and maintaining its key properties such as solubility and viscosity. Applicability: PVPk90 is sensitive to temperature, and traditional spray drying may lead to a decrease in molecular weight due to high temperatures, while vacuum belt drying can solve this problem.
2. Continuous production, high efficiency – Advantages: Material is fed and discharged continuously through the conveyor belt, suitable for large-scale production, reducing batch-to-batch differences and increasing production capacity. – Comparison: Compared with lyophilization (intermittent production), vacuum belt drying more suitable for industrial continuous demand.
3. Excellent ability to handle high-viscosity materials – Advantages: The belt design can spread high-viscosity solutions slurries (such as PVPk90 aqueous solution), and gradually dry them through vacuum suction and low-temperature evaporation, avoiding clumping or sticking the walls. – Applicability: It is particularly suitable for high-molecular-weight polymers such as PVPk90, whose high-viscosity solutions prone to clogging nozzles in spray drying, while vacuum belt drying does not require atomization.
4. High quality of products dried by a vacuum belt dryer – Porous structure: Dried PVPk90 is in a porous and loose state, with faster dissolution speed, which is superior to the dense particles from spray drying – Low residual solvent: The vacuum environment effectively removes water and organic solvents, with low residual content, meeting pharmaceutical standards (such as USP/EP).
5. Energy saving and environmental protection – Low energy consumption: Using low-temperature evaporation, with high thermal efficiency, it is about 20~30% more-efficient than spray drying. – No dust pollution: Closed operation avoids dust flying, meets GMP requirements, and reduces material loss and environmental pollution.
6 Flexible control of process parameters – Adjustable parameters: Conveyor belt speed, temperature zoning, vacuum degree, etc., can be adjusted according to the concentration and weight of PVPk90, to optimize the drying curve and ensure product consistency.
In summary, the vacuum belt dryer is particularly suitable for the drying of high-olecular-weight, heat-sensitive materials such as PVPk90, balancing product quality (solubility, molecular weight stability) with production efficiency, and is an ideal for high-end applications (such as injectable grade PVP). If there are high requirements for product purity and dissolution performance, and large production capacity is required, the belt dryer is the preferred solution. MINJIE Company has accumulated rich drying experience and data support for K90 products, and for such customers, MINJIE Company provide detailed solutions. Welcome to consult.
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