Engineering plastics, particularly Polycarbonate (PC) and PC/ABS resins, are integral to automotive components and high-performance electronics due to their robust properties. However, these materials often face a critical challenge: exposure to high temperatures during manufacturing processes. Such conditions can lead to discoloration and degradation, significantly compromising the final product’s quality and aesthetic appeal. For Automotive R&D Managers and Plastics Engineering Heads, finding innovative material solutions to overcome these hurdles is a constant pursuit.

A white automotive grille-shaped engineering plastic component is placed atop a mound of white pigment powder, with flames blazing in the background to symbolize extreme heat. The image visually highlights the heat resistance and color stability of GEOLOR® ST high-performance pigment.

Wooshin Pigment proudly presents the GEOLOR® ST series of high-heat pigments as a definitive answer to this challenge. Specifically engineered for demanding high-temperature environments, GEOLOR® ST is a surface-treated Titanium Dioxide (TiO2) pigment designed to maintain color stability and effectively prevent discoloration in engineering plastics.   

The Engineering Plastics Conundrum: Discoloration and Degradation at High Temperatures

While offering superior mechanical strength, impact resistance, and clarity, engineering plastics encounter several issues during high-temperature processing:

  • Yellowing and Color Shift: Elevated processing temperatures can trigger thermal degradation in the polymer matrix, resulting in undesirable yellowing or other color alterations. This is particularly noticeable in white or light-colored products, diminishing their aesthetic value.
  • Reduced Pigment Performance: Conventional pigments may lose their tinting strength, gloss, or hiding power when subjected to high heat.
  • Poor Dispersion: Pigment agglomeration or uneven dispersion at high temperatures can lead to color inconsistencies and compromised physical properties in the final product.

Wooshin Pigment’s Innovation: The Technical Superiority of the GEOLOR® ST Series

The GEOLOR® ST series is a high-performance PC/ABS colorant and thermal stability solution developed to address these critical issues. Its core technological advantages include:

  1. Advanced Surface Treatment Technology: GEOLOR® ST utilizes high-quality rutile TiO2 produced via the chloride process, enhanced with Wooshin Pigment’s proprietary surface treatment technology involving Al2O3, SiO2, and organic compounds. This specialized treatment optimizes the interaction between pigment particles and the polymer matrix, ensuring exceptional stability even at elevated temperatures.   
  2. Exceptional Heat Resistance and Color Stability: The GEOLOR® ST series effectively prevents color alteration of PC resin in fixed high-temperature conditions. It excels in maintaining the initial whiteness and blue tone even after high-temperature processing, a critical factor for engineering plastics demanding high heat stability. This means GEOLOR® ST performs reliably where conventional pigments might fail. (TiO2 Content: 92% ~ )   
  3. Superior Dispersion and Processability: GEOLOR® ST facilitates easier blending with PC compounds and significantly improves dispersibility. Excellent dispersion ensures uniform color distribution, enhancing the final product’s aesthetic consistency and minimizing any negative impact on mechanical properties. This translates to increased production efficiency and reduced rejection rates.   
  4. Maintained Tinting Strength and Gloss: Thanks to Wooshin Pigment’s dedicated surface treatment technology, GEOLOR® ST maintains its tinting strength, gloss, and whiteness in engineering plastics that demand high heat stability.   

Anticipated Benefits with GEOLOR® ST Series Application

By incorporating GEOLOR® ST high-heat pigments into applications such as automotive interiors, electronics housings, and high-performance industrial parts, manufacturers can expect:

  • Enhanced final product quality (superior color stability, aesthetic appeal).
  • Reduced rejection rates and improved productivity in high-temperature processes.
  • Increased long-term durability and reliability of products.

Wooshin Pigment is committed to empowering your products to achieve peak performance even under extreme conditions with the GEOLOR® ST series. In the plastics industry, high-temperature resistance is a non-negotiable standard of quality, and GEOLOR® ST stands as the optimal engineering plastics colorant to meet this demand.

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