Bonnet/Spin Pad Cleaning

Theory

Bonnet cleaning is commonly referred to as a “dry” carpet cleaning system. Although not completely dry, bonnet cleaning is considered a low moisture carpet cleaning system. Bonnet cleaning is accomplished by spraying a detergent/solvent solution over the face of the carpet pile. This can be done with hand pump style sprayers, power sprayers, CO2 pressure tanks or specialized spray systems attached to the floor machine. Immediately after spraying, the carpet is buffed with an absorbent pad attached to the machine. The carpet soil is absorbed into the pad. The pad is changed as it becomes soiled and thoroughly laundered prior to the next job. Best results are obtained when the pads are changed before becoming too wet.

Bonnet/Spin Pad Cleaning

Advantages

  • The bonnet system is a relatively fast system enabling the operator to cover large areas quickly.
  • Bonnet cleaning is relatively fast drying.
  • Minimal operator skill required.
  • Excellent system for maintenance programs when used in conjunction with more thorough periodic soil extraction methods.

Disadvantages

  • Bonnet cleaning is not noted for heavy soil removal.
  • No rinsing action.
  • Does not provide deep cleaning action.
  • Used absorbent pads require laundering between jobs.
  • High/low swirls figure 8 pattern if not pile set after procedure.
  • Caution must be used on cut pile carpet.

Many bonnet cleaning solutions that may clean effectively will leave soil attracting residues. Use a bonnet cleaner with a soil retardant to enhance bonnet cleaning effectiveness. Best results are achieved by using a dry bonnet, and regularly changing the bonnets when soiled.

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Steam/Extraction Carpet Cleaning

Theory

The term “steam cleaning” is derived from the original concept of the equipment first utilized in the steam extraction process. Solution pressures were created by large heat generators that relied upon pressure to deliver cleaning solutions to the cleaning tool. A crude vacuum system was used for recovering cleaning solutions. Equipments utilizing high pressure pumps, to deliver cleaning solutions to the cleaning tools and more efficient vacuum systems. This system is also called hot water extraction. Hot detergent solution is injected under pressure; soil is suspended, and wet vacuuming removes soil and excess moisture.

The vacuum efficiency is a combination of both airflow and lift. Airflow is measured CFM (cubic feet per minute) indicating how much air volume is moved per minute. Lift is the measurement of negative vacuum pressure commonly referred to in inches of water or mercury lift. Water lift indicates the amount of vacuum to raise a 1 inch diameter column of water 1 inch while mercury lift refers to the same for a column of mercury; 1 inch of mercury lift = 13.6 inches of water lift.

Preconditioning should be utilized in all instances of heavy soil accumulation. Preconditioning the carpet with Kleen Kuip’s Traffic Tex gives the detergents and solvents more dwell time to effectively break down and suspend soils so that they can be rinsed more effectively out of the carpet fibers.

Advantages

  • Steam cleaning is recognized by most carpet manufacturers and fiber producers as the preferred method for the most efficient soil removal.
  • Present state of the art equipment enables high rates of production.
  • Less residue provided proper chemical usage.
  • Relatively low chemical cost.

Disadvantages

  • Requires high level of operator skill.
  • Longer drying times can occur.
  • Problems associated with overwetting if equipment is not in proper operating condition or operator employs poor technique.
  • High equipment and maintenance cost.
  • A pump operating with insufficient water flow will overheat due to friction.

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Dry Soil Removal – The Pile Lifter and Vacuum

The best preventative solution is to use walk-off mats at entrance areas. This will remove most soil from the shoes of people entering, if the mats are serviced regularly.

Brush MachineImprovements in carpet cleaning equipment, especially with the introduction of the “Truck Mounted Super Cleaners,” has resulted in probably the most commonly overlooked fundamental of all cleaning methods today – proper pre-cleaning vacuuming. Almost 80% of all carpet soil, even fine and particulate, can be removed with dry soil extraction; therefore, it seems ludicrous that so little attention is given to this important area. Vacuuming should be accomplished with good quality commercial vacuum cleaners and a power pile lifter. (Empty vacuum cleaner bags when no more than 2/3 full.) Pile lifters utilize two separate heavy duty motors. One motor drives the large cylindrical brush for superior agitation, pile restoration and grooming while another vacuum motor is used to provide proper airflow.

Always work away from power cords and insure that the plug is properly grounded. When pile lifting and/or vacuuming, it is important to pull the machine against the pile direction for optimum soil removal. Pile lifting is particularly critical in heavy traffic areas of commercial installations.

A good example of dry soil removal is a wet sand laden swimsuit. While the swimsuit wet, it is very difficult to shake out or remove the sand. Once the swimsuit has dried all that is required to remove the sand is just a few quick shakes. The dry sand is easily removed with very little effort. Properly maintained equipment is essential for good dry soil removal. Regular inspection and maintenance of filters, bags, belts and brushes will keep vacuum and pile lifting equipment in top operating condition.

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Fluorescent Optical Brighteners

Optical Brighteners are fluorescent dyes (chemical ingredients) that appear fluoresce blue/white under ultraviolet light and tend to make light colors appear brighter. They show up in sunlight or fluorescent lighting in particular. Be careful in using any product which contains them as a spotter. Each spot, after drying, may appear lighter than the surrounding carpet, looking like color loss. Also, various carpet manufacturers have expressed serious concern about yellowing of optical brighteners over time. Kleen Kuip does not use optical brighteners in any of our solutions.

Brighteners are commonly added to laundry detergents to replace whitening agents removed during washing and to make the clothes appear cleaner. Optical brighteners have replaced bluing which was formerly used to produce the same effect. Some brighteners can cause allergic reactions when in contact with skin, depending on the individual.

Laundry detergent glow under UV light

A laundry detergent glow under Ultraviolet Light (UV) light.

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Rotary Shampoo

Theory

Rotary shampooing is one of the oldest methods of cleaning carpet on location. In recent years, it has received undue criticism from promoters of steam extraction cleaning. Rotary shampooing, when used properly is in fact a very effective system for cleaning carpet. Rotary shampooing utilizes a 175 RPM rotary floor machine equipped with a solution tank and shower feed brush. After thorough vacuuming, the carpet is scrubbed while a shampoo solution is fed through the shower feed brush, which suspends soils. Early shampoo formulation were responsible for leaving sticky residues causing accelerated resoling; however, the synthetic detergent formulations available today have minimized this problem. Modern shampoo formulations such as Kleen Kuip’s Kuik Dry Shampoo dries to crystalline residues that can be easily vacuumed out of the carpet.

Cleaning Method

Following shampooing wet vacuuming with wet dry vacuum equipment is optional. This step in the shampooing process is commonly overlooked. The best results are achieved when the carpet is rinse extracted after shampooing; however, the possibility of over wetting is increased. Following drying, thorough dry vacuuming is important to remove loose soil and crystallized detergent residues. Grooming or pile setting is also very important as the carpet pile is distorted from the scrubbing action and if allowed to dry, will have an uneven appearance.

Advantages

  • Very economical to use.
  • Low equipment and chemical cost.
  • Relatively high production rates can be achieved.
  • Excellent agitation produces deep cleaning and chemical distribution producing good overall cleaning results.

Disadvantages

  • Over wetting and pile distortion can occur with careless operator. (Improperly scrubbing or incorrect brushes are a principal cause of pile distortion.)
  • High level of operator skill required for best results.
  • Residues can increase re-soiling if improper chemicals are used.

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Restorative Carpet Cleaning Methods

Restorative carpet cleaning methods include rotary shampoo and hot water extraction. These corrective cleaning methods are designed for handling heavy soiling conditions. They require higher operator training and skill levels as they have more potential for damage if improperly used.

Restorative Carpet Cleaning Machines RX-20 Bonnet Steam

The Hydramaster RX-20 is a tool every cleaner should have. (machine pictured above in the middle)

The amazing RX-20 Rotary Jet Extractor has revolutionized the way carpets are cleaned. With 5 spray jets matched with 5 vacuum slots, the RX-20 makes over 650 cleaning passes per minute. This super agitation, combined with the unit’s weight, deeply cleans, extracting soil and cleaning solution. The rotating head cleans all sides of the carpet fiber, fluffing up and restoring the pile. Save your back, clean more carpets and clean them better!

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Dry Powder Cleaning Method

Theory
Dry powder carpet cleaning utilizes a dry absorbent media impregnated with solvents, detergents and water. This material is broadcast over the surface of the carpet and brushed into the carpet pile with special equipment. Carpet soil is solubilized by the detergents and solvents then absorbed into the media. After drying, the soil laden media is vacuumed from the carpet. The carpet pile is also conditioned by the brushing action.

Advantages

  • Very fast drying, carpet can be back in service quickly
  • Requires little operator skill level

Disadvantages

  • Low level soil removal ability
  • Buildup of soil media if not thoroughly pile lifted/vacuumed out of carpet
  • Face yarn distortion can occur from dry brush action
  • High chemical cost
  • Slower production rates than all other interim carpet cleaning methods (i.e. highest labour cost)

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