Polyester plush fabric itself does not naturally inhibit bacteria and mites, and must undergo antibacterial and mite resistant modification/post-treatment to possess this function; Qualified products can achieve a bacteriostatic rate of ≥ 90% and a mite repelling rate of ≥ 70%, but the effect decreases with increasing water washing times. Below, we will explain the principles, standards, selection, washing life, and applicable scenarios clearly.
1、 Principle: Why can polyester plush inhibit bacteria and mites?
Polyester itself has no natural antibacterial properties, and its plush structure is prone to hiding dirt and dust mites; The function comes from modification or post-processing.
Fiber modification (long-lasting): Nano silver/zinc, titanium dioxide, chitosan, etc. are added during spinning, and antibacterial agents are locked inside the fibers for better water resistance.
Post finishing (mainstream): Dip rolling/coating with quaternary ammonium salts, organic guanidine, nano silver, etc., forming an antibacterial layer on the fiber surface, damaging bacterial cell membranes, and inhibiting mite adhesion.
Mite prevention logic: one is chemical repellent/inhibition, and the other is high-density structure to reduce mite penetration and breeding.
2、 Core indicators and national standards (must see when purchasing)
✅ Antibacterial (GB/T 20944.3, GB 15979)
Escherichia coli and Staphylococcus aureus: inhibition rate ≥ 90% (after 20 washes)
Candida albicans: inhibition rate ≥ 70% (after 20 washes)
Qualified line: Antibacterial rate ≥ 99% (promotional standard 99.9%)
✅ Mite prevention (GB/T 24253, FZ/T 62039)
Mite repelling rate ≥ 70% (effective), ≥ 95% (extremely strong)
After 20 washes: * * mite removal rate ≥ 60% * * is considered qualified
✅ safety
Formaldehyde ≤ 20mg/kg, pH 4.0-7.5, no skin irritation
3、 Polyester plush vs natural fibers (cotton/linen/bamboo fibers)
Pure cotton: natural, non antibacterial, easy to absorb moisture and produce mites; Additional mite prevention treatment is required.
Bamboo fiber/hemp: It has natural weak antibacterial properties (such as bamboo and wax), but its mite resistance is weak and it is prone to failure when washed with water.
Polyester plush (modified): strong antibacterial and mite resistant, stable, and washable; Not hygroscopic and not easily moldy; Suitable for bedding, pillows, and blankets.
4、 Water washing lifespan (key pain point)
Ordinary post-treatment: After 20-30 washes, the antibacterial rate drops to below 80% and the mite resistance significantly decreases.
High quality silver embedding/spinning grade: After 50 washes, the antibacterial rate remains ≥ 85% and the mite repellent rate is ≥ 70%.
Market situation: Low price goods (<100 yuan) are mostly short effect coatings, which basically fail after washing 5-10 times; Brands priced over 200 yuan are more stable.
5、 Applicable scenarios and pitfalls avoidance
✅ most suitable
Beddings: flannel, coral fleece, Raschel blanket, pillowcase, duvet cover
Home: Plush pillows, sofa covers, window cushions
Sensitive populations: preferred bedroom for those with rhinitis, asthma, and dust mite allergies
❌ Pitfall warning
Be cautious of * * “permanent antibacterial and mite prevention” * * promotion: there is no permanent, it will decay with water washing.
Check the test report: There must be antibacterial/anti mite data after 20 water washes, and those that only indicate the initial value are often marked as false.
Identify non soluble types: safe and resistant to drugs; Dissolution type may irritate the skin and contaminate the environment.