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Commercial carpet fibers compared: nylon, polyester, olefin and wool
The fiber in your carpet decides how it stands up to traffic, how spills and oily soil behave and which cleaning products are safe to use. Here is how the main materials compare.
What your carpet is made of matters more than its color
Two carpets can share a pattern and a pile height and still behave like different floors, because the yarn is made from different material. Fiber controls how the pile holds up under shoes and casters, whether a spill sits on the surface or soaks into the strand, how readily oily soil clings and how much heat and alkalinity the carpet will tolerate during a deep clean.
Commercial carpet draws on a short list of materials: nylon in its two main forms, solution-dyed nylon, polyester and its subclass triexta, olefin and wool. Each one asks something slightly different of the people who maintain it.
Fibers side by side
The table sets out what each fiber is, how it handles soil and spills, any published life figure and the cleaning point that matters most. Years appear only where a published life-cycle model gives one.
| Fiber | What it is | Soil and spills | Published life | Cleaning notes |
|---|---|---|---|---|
| Nylon 6 and 6,6 | Synthetic; two nylon types named for their chemistry | Valued for wear resistance; dye spills can stain | 11-year broadloom, 15-year tile (NIST BEES model) | Restorative extraction within the product’s pH limit |
| Solution-dyed nylon | Nylon colored while the polymer is molten | Color runs through the strand; preferred where spills occur | No separate published figure | Color is locked in; soil and residue still build |
| Polyester (PET) | Synthetic polyester fiber | Attracts oily soil | No published figure | Pre-treat oily lanes; rinse residue thoroughly |
| Triexta (PTT) | Polyester subclass named by the FTC in 2009 | Polyester family; watch for oily soil | No published figure | Treat like polyester: pre-treat oily lanes, rinse well |
| Olefin (polypropylene) | Synthetic that absorbs very little water | Resists sunlight and chemicals; attracts oily soil | No published figure | Pre-spray for oily soil; keep residue low |
| Wool | Natural protein fiber, alone or blended | Valued for durability; sensitive to alkaline products | 25-year (NIST BEES model) | Cleaners at pH 7.0 or below |
The years come from NIST’s BEES model: 25-year for wool carpet, 15-year for nylon tile and 11-year for nylon broadloom, each an input to a life-cycle calculation rather than a measurement of floors in service. No authoritative source publishes a life in years for olefin, polyester or triexta, or for solution-dyed nylon against other nylon, so those cells stay empty of numbers. Traffic and care decide how close any floor comes to a model figure.
Nylon and solution-dyed nylon
CRI’s facility guidance describes nylon as widely used for its wearability and abrasion resistance. Nylon 6 and nylon 6,6 are the two forms found in carpet, named for their chemical structure. Conventionally dyed nylon takes color well, and the same property means a strongly colored spill can leave a stain if it is left to sit.
Solution-dyed nylon is colored before the fiber is formed, so the pigment runs all the way through each strand rather than coating its surface. CRI’s healthcare guidance prefers solution dyeing in areas where spills occur, and Interface’s warranty covers its solution-dyed products against excessive color loss from indoor light. Solution dyeing protects color, not cleanliness: soil, sticky residue and traffic lanes still build up and still need regular removal. For quick action on spills of any kind, our carpet spill response guide gives staff the first moves.
Polyester, PET and triexta
Polyester carpet fiber is polyethylene terephthalate, shortened to PET. In 2009 the FTC created triexta as a generic subclass name within polyester for PTT fiber, so triexta is polyester by definition even when it is sold under its own name. Fibers in the polyester family attract oily soil, which shows up as a gray film in walkways and around food areas.
For cleaning, that oily soil is the main concern. A pre-treatment that breaks down oils, followed by a thorough rinse, keeps the lanes from graying again quickly. Interface’s maintenance guidance links fast re-soiling to cleaning products that dry to an oily or tacky film, and that point matters most on fibers that already hold onto oils.
Olefin (polypropylene)
CRI’s guidance credits olefin with sunlight and chemical resistance. It takes up almost no moisture, which leaves water-based spills sitting on top where staff can blot them. Like polyester, it attracts oily soil, so walkways near entrances and break areas are where that film shows first on an olefin floor.
Cleaning olefin is about soil and residue more than color. A degreasing pre-spray in the lanes, controlled moisture and a clean rinse leave little behind for new soil to grip. Spot and stain removal between visits handles the marks that do set.
Wool and wool blends
CRI lists wool among the fibers chosen for durability. Wool is a natural protein fiber, and that is what makes its care different. Brintons, a woven wool carpet maker, tells cleaners not to use products above pH 7.0 on wool or wool blends, to use WoolSafe-approved chemicals and to clean with hot-water extraction every three months.
Water temperature and drying deserve the same attention, so a crew follows the carpet maker’s guidance on both. If your building has wool or a wool blend anywhere, flag it before the first visit so products are chosen for it.
Yarn type, protector and your cleaning plan
How the fiber is spun matters as well. CRI’s healthcare guidance prefers bulked continuous filament (BCF) yarn over staple because it fuzzes and sheds less. Spun staple carpet sheds loose fiber when new; CRI’s troubleshooting bulletin says that is normal, does not affect the carpet’s life and mostly ends within the first year.
The fiber also shapes the deep clean and what follows it. Hot-water extraction is the restoring method for most commercial fibers, with products kept inside the carpet maker’s pH limits; Interface’s guidelines, for example, cap cleaner pH at 9.5 for its tile. Carpet protector applied after extraction helps the cleaned fiber resist the next spill. If you are unsure what your carpet is made of, the spec sheet, the warranty or the label on spare stock will say. Bring any of them to the free walkthrough, and your written quote will pair each area’s fiber with the right method and visit schedule, set around your hours.
A few useful answers
Common questions.
Which commercial carpet fiber lasts the longest?
NIST’s life-cycle model assumes 25-year wool, 15-year nylon tile and 11-year nylon broadloom lives. Those are model assumptions rather than measured lives, and no authoritative figure exists for olefin, polyester or triexta. Traffic and maintenance decide how long your own floor lasts.
Is solution-dyed nylon stain-proof?
No. Its color runs through the whole fiber, so spills are less likely to change the color, and CRI prefers it where spills are common. Soil, sticky residue and some substances still mark it, so prompt blotting and regular cleaning still apply.
Why do our polyester or olefin walkways look gray so soon after cleaning?
Both fibers attract oily soil, and cleaning that leaves residue behind gives new soil something to stick to. A degreasing pre-treatment and a thorough rinse address both causes, and good entrance matting cuts how much oil reaches the carpet.
Can wool carpet be cleaned with hot-water extraction?
Yes. Brintons’ own guidance calls for a hot-water extraction every three months on its wool carpet, using products at pH 7.0 or below and WoolSafe-approved chemicals. Let us know where the wool is so products are chosen to suit it.
How do we find out what fiber our carpet is?
Check the spec sheet from the installation, the manufacturer’s warranty or the label on any spare rolls or tiles. If none survive, the installer or flooring company that laid the carpet may have the records.