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Comparison of Carpet Cleaning Systems
Absorbent Powder / Dry Extraction CleaningAn absorbent granular material that has been incorporated into a mixture of detergent, solvent and water is brushed into the carpet pile with a machine incorporating a double cylindrical brush. Once the material has dried the carpet is vacuumed to remove the powder and the soil that it has captured. The best use for the absorbent powder cleaning method is the commercial installation where they clean regularly and require quick drying.
Bonnet/Spin Pad
This method in appearance is similar to the rotary shampoo method. The machine used is essentially the same. A detergent is usually sprayed onto the carpet. A rotating absorbent pad spins and agitates the carpet fibers as the soil is collected into the pad. This is not a preferred method for cut pile carpet for like the rotary shampoo method it can cause untwisting of the face pile. While this method is reasonably quick drying it must be done more often as it is more of a surface cleaning. The best use for cylindrical foam cleaning is the commercial installation where they clean regularly and require quick drying.
Cylindrical Foam Shampoo
The cylindrical foam method uses a machine with an air compressor that whips the shampoo solution into heavy foam. The foam is brushed into the carpet with a cylindrical brush. Once the carpet has dried it is vacuumed to remove the shampoo and the particles that have theoretically bonded to it. Not all of the shampoo and soil is actually captured but instead much of it is forced deeper into the pile. While this method is reasonably quick drying it must be done more often as it is more of a surface cleaning. The best use for cylindrical foam cleaning is the commercial installation where they clean regularly and require quick drying.
Rotary Shampoo
The Rotary shampoo method uses chemicals similar to those used with cylindrical foam. The rotary floor machine usually has an attached solution tank for the shampoo solution. The diluted solution is fed through a tub to a “shower-feed” where it is applied to the carpet. While the shampoo is being applied a round brush on the machine is scrubbing the carpet. This shampoo method uses more moisture than the cylindrical brush method. The rotary shampoo method is not recommended for use on cut pile carpet as it can cause untwisting of the face pile.
Steam Cleaning or Hot Water Extraction
With this method a non-foaming detergent is injected into the carpet fibers and is almost simultaneously vacuumed out of the carpet taking the dirt and soil with it. The extraction method when performed a skilled technician and quality chemicals will leave very residue to attract to soil. In the hands of an unskilled person the carpet can be over-wet.
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