Application Scenarios and Advantages of Recycled Polyester Fiber Fabrics
Recycled polyester fiber (rPET) is an environmentally friendly material made from recycled plastic bottles, waste textiles, etc., and is currently widely used in the following fields:
Apparel Industry: Fast fashion brands such as H&M and ZARA use rPET to make T-shirts and jackets, accounting for over 30% (according to the Textile Exchange 2022 report). Its lightweight and quick-drying properties are suitable for sportswear.
Home Textile Products: Cushions, curtains, etc., are favored due to rPET's wrinkle resistance (elastic recovery rate ≥85%) and low cost.
Industrial Uses: Automotive interiors, filter materials, etc., utilizing its chemical resistance (stable within a pH range of 3-11).
Advantages include:
Environmental Protection: Each ton of rPET reduces oil consumption by 3.8 barrels (US EPA data).
Economical Benefits: Cost is 15%-20% lower than virgin polyester.
Causes and Solutions to Deformation Problems The deformation of recycled polyester fibers mainly manifests as shrinkage, pilling, and loss of elasticity. The main contributing factors include:
Heat Sensitivity: At temperatures exceeding 120℃, fiber molecular chain recombination leads to shrinkage (experiments show that shrinkage after ironing can reach 5%).
Mechanical Fatigue: Repeated friction causes fiber breakage, and the pilling rate is 40% higher than cotton (ASTM D4970 test standard).
Poor Moisture Absorption: The moisture regain is only 0.4% (compared to 8.5% for cotton), leading to static electricity accumulation and exacerbating deformation.
Improvement Measures:
Blending Technology: Adding 5%-10% spandex can improve elasticity (e.g., the elongation of a blended fabric of 82% rPET + 18% spandex increases to 130%).
Finishing Process: Treating with silicone oil softener reduces the coefficient of friction to below 0.25 (original value 0.35).
Usage Recommendations: Avoid high-temperature washing (recommended water temperature ≤30℃), and dry inside out to reduce UV damage.
Future Development Trends
Performance Optimization: Nanocoating technologies (such as graphene modification) can improve heat resistance to 150℃.
Circular Economy: Chemical recycling methods (such as depolymerization) allow rPET to be recycled 5-7 times without significantly reducing performance.
