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Dry Roller Compaction
Dry roller compaction is the process of using mechanical pressure to compress fine powders into denser sheets. The basic concept of compaction is to force fine powders between two counter rotating rolls. As the volume decreases through the region of maximum pressure, the material is compressed into dense sticks or corrugated sheets. These sheets are then granulated through a milling system and series of screens to achieve the precise, uniform granule size specified.
Dry roller compaction is the best granulation process for materials sensitive to moisture and heat. Unlike wet granulation processes, which require liquid binders, alcohol solvents and high temperature drying, our roller compaction is free of these additional ingredients and energy requirements. The end result is a higher quality, consistent granule—usually at a lower cost.
In addition to high quality and consistency, dry roller compaction produces granules that are:
- More durable, for improved crush strength.
- Uniform, for more even downstream blending. Roll compaction produces consistent, irregular-shaped granules that "interlock" to reduce product stratification during shipping and handling.
- Highly flowable powders compared to powders that bridge and cake. Tableting and other downstream processes are more efficient.
- Sized specifically to meet your precise product requirements. Roller compaction offers control and range of granule size.
- Dust free to prevent cross-contamination in the next stage of production. By converting your raw material to granule form, you greatly minimize dust that can cause health and production problems while decreasing maintenance costs.
- Easily handled, transported and stored because of increased bulk density and flow properties.
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Download the WelchDry brochure
(235 K) Adobe PDF |
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