1. Major Industry News in 2025

1. Sinopec Yangzi Invests 3 Billion Yuan in Specialty Nylon Project

   • Sinopec Yangzi Petrochemical is constructing a "50,000-ton/year YDA industrial facility and 18,500-ton/year specialty nylon polymerization plant," expected to begin production in 2025 to address high-end nylon monomer supply challenges.

2. Hengyi Petrochemical Develops Flame-Retardant Stain-Resistant Copolymer Nylon 6

   • Hengyi Petrochemical has patented a new flame-retardant and stain-resistant nylon 6 using phosphorus- and silicon-containing comonomers, suitable for high-end textiles and industrial applications.

3. Hebi City to Build World's Largest Nylon 66 Fine Denier Fiber Base

   • Henan's Hebi City is investing 18.5 billion yuan to establish a specialty nylon industrial park, set to become the world's largest production base for nylon 66 fine denier fibers, including products for airbags and industrial yarns.

4. China Resources Launches High-End Nylon 66 Project

   • China Resources Group invested 5 billion yuan in a project producing 160,000 tons of nylon 66 chips and 30,000 tons of differentiated fibers annually, primarily for tire cords and airbag applications.

5. Shenzhen Jundingda Develops High-Performance Nylon Monofilament

   • The company patented an aluminum powder-coated nylon monofilament with enhanced strength and weather resistance for 3D printing and industrial yarn applications.

2. Development History

• 1930s: DuPont invented nylon 6 (polycaprolactam), commercialized in 1939 (initially as filament).

• 1950s: Staple fiber technology matured, replacing wool products.

• 1980s: Japan's Ube Industries developed nylon 66 staple fiber with improved heat resistance.

• Post-2000s: Diversification (flame-retardant, conductive, low-melt) and recycling breakthroughs.

3. Physical Properties

4. Chemical Properties

• Chemical resistance:

  • Resistant to weak acids/bases but degrades in concentrated HCl/HNO₃

  • Excellent oil resistance (unaffected by gasoline/lubricants)

• Dyeability:

  • Requires acid dyes at room temperature; deep dyeing at 120°C

• Light resistance:

  • Prone to UV yellowing; requires light stabilizers (e.g., HALS)

5. Development Prospects

1. Automotive lightweighting:

   • Nylon fiber-reinforced composites replacing metal components.

2. Sustainable materials:

   • Chemical recycling (depolymerization-repolymerization) costs may drop 30%.

3. Smart textiles:

   • Conductive nylon fibers (carbon nanotube-coated) for wearables.

6. Key Application Industries

1. Apparel textiles:

   • Performance sportswear, seamless underwear.

2. Industrial applications:

   • Oil-resistant filtration, tire cords.

3. Emerging fields:

   • 3D printing powders, battery separators.