Carpets and flooring can frequently be a source of unwanted microbes. Fungi can flourish in moist areas under carpets and floors and create musty odours and loss of product integrity. Carpet and rugs can trap dirt and spills within the face fibres, leading to odours and staining from microbial growth if not properly cleaned.
Hard surfaces become susceptible to attack when the topcoat and wear layers are worn away over time. Adhesives used in flooring can also support fungal growth which can lead to eventual discolouration and deterioration.
An anti microbial floor or carpet offers many benefits.
Ultra-Fresh antimicrobials can be foamed onto or extruded directly into fibers to prevent bacterial growth on the carpet surface. For added control against mold and mildew, Ultra-Fresh products can be incorporated into the latex or secondary backing. Additional antimicrobial protection can be achieved by combining treatments with the use of an Ultra-Fresh treated foam underlay.
Hard surfaces can also be protected by adding Ultra-Fresh into the topcoat or wear layers, as well as the backing. Once applied, Ultra-Fresh becomes a permanent part of the antimicrobial flooring or antimicrobial carpet structure and will extend the useful life of the product.
Silver based antimicrobials are commonly used when the treatment is built directly into the carpet fibers via an extrusion process and creates an antibacterial carpet. Zinc pyrithione and silane quat compounds are often used when the treatment is topically applied to the face fibers via a foaming process.
To treat the backing, zinc pyrithione, thiazbendazole and isothiazoline based technologies are often selected. Zinc pyrithione provides strong antibacterial properties while thiabendazole and isothiazolinones offer supreme antifungal protection, keeping carpet backing free from mold and mildew growth.
To provide antimicrobial activity to the top coat of hard surface flooring, silver or isothiazoline based options are often selected.
Silver, thiabendazole and isothiazoline additive options are again popular choices due to their ability to withstand the severe processing conditions that these types of flooring product endure.
The 10,10′-oxybisphenox-arsine or “OBPA” chemical was historically the product of choice for flexible vinyl flooring. This arsenic based biocide was preferred due to low cost and its antimicrobial effectiveness. Today, OBPA cannot be used in Europe since it is not BPR listed and goods imported into the EU are not allowed to contain this biocide. In addition, OBPA is currently under review by the US Environmental Protection Agency (EPA).
As a result, a generation of newer, greener and equally effective antimicrobial options have been developed to replace OBPA. The most common additives used to manufacture antimicrobial vinyl flooring include various isothiazoline , zinc pyrithione, thiabendazole and silver antimicrobial treatments. Each active ingredient has its strengths and weaknesses.
For example; zinc and silver have strong antibacterial activity at low concentrations but higher levels are needed to achieve adequate antifungal properties. Others, such as isothiazoline and thiabendazole, have robust antifungal profiles but are not as effective against bacterial attack.
Synergistic combinations of different actives can lower overall anti-microbial use levels, provide economical savings and most importantly, deliver superior antimicrobial performance.
Other options such as IPBC and folpet are occasionally touted as possible substitutions for OBPA. However, IPBC causes severe yellowing of vinyl and other polymers over time and folpet is listed on California’s Proposition 65 as a carcinogen.
The most popular type of flooring underlayment normally consists of polyurethane foam. To learn more about polyurethane foam application, please click here.
Other types of underlayment consist of recycled textile materials or thick nonwoven goods. Zinc pyrithione, thiabendazole, silane quat or silver based technologies are commonly used for these types of underlay options.
Many test methods developed by organizations such as the American Association of Textile Chemists and Colorists (AATCC); American Society for Testing and Materials (ASTM); International Organization for Standardization (ISO); and Japanese Industrial Standard (JIS) are available to evaluate antimicrobial performance.
Such standardized test methods are often developed for specific types of materials, end-uses or antimicrobial technologies; therefore choosing the correct test method is crucial.
Manufacturers looking to assess their antibacterial carpet should use quantitative test methods such as the AATCC Method 174, Part II or the ISO 20743 (JIS L 1902). To test antifungal performance of carpets, standardized fungal test methods such as the AATCC Method 174, Part III, AATCC Method 30, Part III or ASTM G21 are recommended.
Companies testing antibacterial flooring should utilize bacterial test methods such as the ISO 22196 (JIS Z 2801). For antimicrobial vinyl flooring, assessment against pink staining using the ASTM E1428 is recommended. Antifungal properties are typically assessed using the AATCC Method 30, Part III or the ASTM G21.
For more information regarding the best test methods to use for your flooring product, contact us!
The photos below are an example of the benefit of adding antimicrobial additives to carpet backing. Under the right conditions, mold and mildew can flourish by using the carpet latex as a favorite food source, especially when moisture becomes trapped underneath. Antimicrobials keep the area you don’t see cleaner and helps flooring last longer.
Both carpet samples were tested using the AATCC Method 174, Part III. The test organism used was Aspergillus niger.
Want to see more comparison photos taken by our microbiologists? Visit our antimicrobial photo gallery.
Our antimicrobial products are commonly used in the following flooring and carpet end-use areas:
Below are just a few examples of the flooring companies we work with:
Please visit our “Who We Work With” page to see more of our partners.
For more information on which Ultra-Fresh antimicrobial treatments are suitable for your carpet or flooring applications, contact us!
Ultra-Fresh technology is currently used in flooring products around the world. To manufacturers, the Ultra-Fresh brand is recognized globally as a standard of excellence in antimicrobial technology. To consumers, Ultra-Fresh offers a promise of product quality and integrity. Interested in learning more about some of our flooring partnerships?