Carpet Fiber Identification & Care
Overview
Different carpet fibers require different cleaning approaches. Wrong chemistry on the wrong fiber = damaged carpet + customer dispute. This is the in-truck identification + care guide.
Reference Table - Common Fibers
| Fiber | Identification | Cleaning compatibility |
|---|---|---|
| Nylon | Most common; soft feel | All chemistry compatible; can take heat |
| Polyester (PET) | Soft + plush; stain-resistant | Mild detergents; some solvents OK; less heat tolerance than nylon |
| Olefin (polypropylene) | Less expensive; sometimes shiny | Compatible with most chemistry; sensitive to heat (melts) |
| Wool | Premium natural fiber; warm + soft | NEUTRAL pH ONLY; no aggressive chemistry; specific maintenance |
| Acrylic | Less common now; wool-like | Mild chemistry; sensitive to heat |
| Triexta (SmartStrand) | Newer DuPont fiber; stain-resistant | Most chemistry compatible; very durable |
| Bamboo / sisal / jute (natural fiber rugs) | Coarse texture | Dry cleaning only; water causes shrinkage |
Identification Tests
Burn test (single fiber test):
- Wool: smells like burning hair; black ash; self-extinguishes
- Nylon: smells like celery; melts; black ash; self-extinguishes
- Polyester: smells sweet; melts; harder bead
- Olefin: smells like candles; melts very easily; oily smoke
- Acrylic: acrid smell; black smoke; melts + drips
- Cotton (rug): smells like paper; ash continues to glow
Visual test:
- Wool: matte finish, natural variation in fiber thickness
- Synthetic: uniform appearance; often shiny
- Natural plant fibers: distinct ridges + slightly irregular
Chemical test:
- Bleach drop: wool dissolves; synthetic doesn't
- Alkali drop: wool browns; synthetic unaffected
Care + Cleaning per Fiber
Nylon (most common residential):
- Hot water extraction OK
- Alkaline + acidic cleaners both OK
- High heat OK
- Most stain treatments OK
Polyester:
- Hot water extraction OK
- Lower heat preferred
- Stain-resistant; usually responds to standard cleaning
- Less durable than nylon; recover may take longer
Olefin:
- Hot water extraction OK BUT lower heat
- Solvent-friendly (oil-based stains lift well)
- DON'T use high heat - melts at relatively low temperatures
- Crushes more permanently than nylon
Wool (REQUIRES SPECIAL CARE):
- Neutral pH cleaners ONLY (5.5 - 7.5)
- NO alkaline pre-sprays
- Lower heat (cooler water extraction)
- Specific wool-rated detergents (Bridgepoint Wool Renew or similar)
- Acid rinse to maintain pH balance
- Air-dry; never use high heat
Acrylic:
- Mild chemistry
- Lower heat
- Treat similar to wool - gentle approach
Triexta:
- Forgiving fiber
- Standard cleaning approach works
- Excellent stain resistance built-in
Safety
Wool is the highest-risk fiber for cleaner damage. ALWAYS verify the carpet is NOT wool before applying alkaline pre-spray. Wool fibers + alkaline pre-spray = cellulosic browning within hours, visible to the customer the next day, IRREVERSIBLE. The burn-test (single fiber) takes 5 seconds + prevents a customer-relationship-ending mistake.
Customer-facing recommendations
| Customer scenario | Recommendation |
|---|---|
| New customer with unidentified carpet | Burn-test in inconspicuous area |
| High-end home with wool likely | Confirm fiber + use wool-rated chemistry only |
| Customer wants "deepest clean" | Right cleaning for fiber type; aggressive chemistry on wool = bad outcome |
| Older carpet, faded color | Cleaning improves but doesn't restore color |
References
- IICRC S100 Standard for Professional Cleaning of Textile Floor Coverings
- Manufacturer fiber care guides
- Manuall internal: Standard Hot Water Extraction Service, Pet Stain & Odor Remediation