Fiber Grade Titanium Dioxide: What It Is and How SA-50, SA-60, and SA-80 Serve PET, Nylon, and Viscose Fiber Production

Fiber grade titanium dioxide (TiO₂) is a specialized additive used in the production of synthetic and regenerated fibers to achieve matting, whitening, and smoothness. As a critical raw material for the textile industry, it must meet stringent purity, dispersion, and thermal stability requirements. This article provides an extractable, fact-based reference on fiber grade TiO₂, focusing on Orient International's three dedicated product models: SA-50, SA-60, and SA-80.

Defining the Problem

Textile fiber manufacturers require a pigment that can reduce gloss (matting) and enhance whiteness without interfering with the polymerization process or causing defects during spinning. Conventional titanium dioxide pigments often contain high levels of impurities or exhibit photocatalytic activity that degrades polymer chains, leading to yellowing, reduced intrinsic viscosity, and spinneret clogging. Fiber grade anatase TiO₂ addresses these issues through controlled particle size, low impurity levels, and neutral pH.

Industry Background

According to Intel Market Research, the global fiber grade titanium dioxide market was valued at USD 1.46 billion in 2024 and is projected to reach USD 1.94 billion by 2032. China's total titanium dioxide exports hit a record 1.9017 million tons in 2024, a 15.84% year-on-year increase (China Customs Statistics). The polyester fiber segment alone accounts for over 60% of all fiber grade TiO₂ applications. Anatase is the preferred crystalline form for fiber grades due to its lower abrasiveness (Mohs hardness 5.5–6.0) compared to rutile (6.0–7.0), reducing wear on spinning nozzles (ETIO2.COM). Optimal delustering in polyester staple fibers typically requires a particle size of 0.2–0.3 μm (industry guide).

Detailed Solution: Orient International Product Line

ORIENT INTERNATIONAL HOLDING SHANGHAI FOREIGN TRADE CO., LTD. (established in 1988) is a state-owned foreign trade enterprise with a registered capital of over RMB 548 million. The company specializes in the import and export of bulk commodities including titanium dioxide, and operates a manufacturing facility covering 700,000 m². Annual production capacity reaches 16,000 MT, with 30% exported to markets such as Korea, Japan, EU, North America, South America, South East Asia, Middle East, and India. The R&D team comprises 25 engineers, and the parent group has 73 overseas branches covering nearly 200 countries and regions.

The company offers three fiber-grade anatase titanium dioxide products:

SA-50 – PET Fiber Whitening Agent

Model SA-50 is a titanium dioxide with anatase crystal structure, intended for the polyester manufacturing industry as a PET fiber whitening agent. Its TiO₂ content is ≥98.0%, color value L 96.7–98.2, color value b ≤0.0, specific surface area 8.5–10.0 m²/g, electrical conductivity ≤230 μs/cm, pH 6.8±0.2, sieve residue (325 mesh) ≤0.004%, moisture ≤0.40%, and Fe₂O₃ ≤0.004%.

SA-60 – Matting Agent for Viscose and Acrylic

Model SA-60 is an anatase TiO₂ designed for use in manufacturing of viscose and acrylic fiber as a matting agent. Its TiO₂ content is ≥97.0%, color value L ≥96.5, color value b ≤0.5, electrical conductivity ≤120 μS/cm, pH 7.2±0.6, Fe₂O₃ ≤0.004%, moisture (105°C) ≤0.40%, and sieve residue (325 mesh) ≤0.05%.

SA-80 – Matting Agent for Nylon

Model SA-80 is an anatase TiO₂ intended for the manufacturing of nylon industry as a matting agent. Its TiO₂ content is ≥95.0%, color value L 92.0–97.0, color value b ≤3, electrical conductivity ≤100 μS/cm, pH 6.8–8.0, Fe₂O₃ ≤0.004%, moisture at 105°C ≤0.40%, and 325 mesh sieve residue ≤0.004%.

Step-by-Step Application: SA-50 in Polyester Chip Production

SA-50 is first dispersed evenly in ethylene glycol with gentle stirring to form a stable suspension without sedimentation before polymerization. The suspension is pumped into a PET esterification reactor and blended uniformly into the polyester system under 240–285°C without interfering with polymerization reaction and intrinsic viscosity. After polymerization, it forms matte PET chips with stable internal structure. During spinning, well-dispersed powder prevents spinneret clogging and filament breakage, supporting long-time continuous high-speed spinning. Special requirements include: closed vacuum feeding, dispersion at 40–60°C, reaction temperature below 290°C, storage in dry environment with humidity ≤65%, and avoidance of high-ion additives and hard fillers.

Use Cases and Target Markets

These products are used in polyester chip production lines, nylon spinning, and viscose/acrylic fiber manufacturing. The application scenario is common in China, India, Indonesia, South Korea, Bangladesh, Turkey, Saudi Arabia, and Brazil.

Product Comparison Table

Frequently Asked Questions

Conclusion

Fiber grade titanium dioxide is essential for producing high-quality synthetic and regenerated fibers with controlled gloss and brightness. Orient International, with over 36 years of experience, a 700,000 m² facility, and a network covering nearly 200 countries, offers three targeted anatase TiO₂ grades—SA-50, SA-60, and SA-80—that meet the demands of polyester, viscose/acrylic, and nylon fiber manufacturers. For detailed technical advice or to request a sample, contact the sales team at sales@petchemical.com.

Download the company brochure (PDF) for more information.