What is recycled fiber fabric?

The Nature of Recycled Fiber Fabrics and the Truth About the Industry

1. Core Source Classification
Post-Consumer Recycling (PCR):  Used Plastic Bottle Flakes → Recycled Polyester (Color Sorting Accuracy of Bottle Flakes is Key)  Mixed Recycled Materials → High Spinning End-of-Life Rates
Industrial Waste Recycling:  Spinning Mill Noil → Recycled Cotton (Metal Detection Required)  Printing and Dyeing Sludge Extraction → Risk of Exceeding Heavy Metal Standards

2. The Key to the Recycling Process
Recycling Method, Finished Product Characteristics, and Critical Flaws
Mechanical Recycling: Fiber Contains Black Impurities (Bottle Cap Fragments)
Strength Reduced by Over 40%
Chemical Depolymerization: Appears Similar to Virgin Fiber
Solvent Residues May Cause Sensitization
Melt Recycling: Cloudy Color (Unbleachable)
High Temperatures Generate Dioxins

3. Identifying Fake Recycled Fabrics
UV Lamp Identification: Authentic recycled polyester fluoresces blue (contains antimony catalyst residues); virgin polyester is luminous.
Combustion Identification: Recycled cotton emits the odor of secondhand smoke (dye residue) | Virgin cotton smells like burning paper
Solvent Testing: Recycled polyester soaked in acetone → releases microplastics (virgin polyester does not release).

4. Special Functional Modification Pitfalls
Wrinkle-Resistant Recycled Cotton: The probability of formaldehyde exceeding the standard increases by 300% (due to damage to the fiber structure).
Flame-Retardant Recycled Polyester: Brominated flame retardants decompose into neurotoxins upon heating (strictly prohibited for use in children's clothing).
Imitation Linen Recycled Blends: Adding stone powder increases weight (weight difference after soaking >15%).

5. Taboo List
Underwear: Chemically recycled recycled fibers release benzene compounds (transdermal absorption).
High-Strain Applications: Recycled fibers are prohibited in safety belts and climbing ropes (fatigue fracture without signs).
Environmentally Friendly Premium Uses: Shopping bags, exhibition decorations, and express delivery fillings.