In the production process of molded plastic factories, the issue of product fading is a complex and multifaceted challenge, rooted in several key factors. From DAYIN Plastics’ perspective, this phenomenon is primarily attributed to the physical and chemical properties of pigments and dyes, as well as the unique characteristics of the resins used. Specifically, the following aspects are worth in-depth exploration and optimization:
- Lightfastness of Colorants
One of the most direct and significant factors affecting product fading is the lightfastness of the colorants. For products exposed to strong outdoor light for extended periods, the lightfastness of the colorants must meet high standards, ideally reaching level six, with levels seven to eight being preferable, to ensure long-lasting color. In contrast, for products used indoors, while the requirements for lightfastness are slightly lower, selecting colorants with a lightfastness rating of four to five can still ensure good color stability. - Light Resistance of Resins
As the base material of the products, the light resistance of resins is equally important. Ultraviolet (UV) radiation can alter the molecular structure of resins, leading to color fading. To enhance overall light resistance, UV absorbers and other light stabilizers can be added to the resin formula to effectively resist UV damage, ensuring the color remains vibrant and unchanged.
- Heat Resistance of Pigments
In high-temperature processing environments, the heat resistance of pigments becomes another crucial factor in determining whether a product will fade. Inorganic pigments, such as metal oxides and salts, are favored for their excellent thermal stability. In contrast, organic pigments are prone to molecular structure changes and decomposition at high temperatures, leading to color alterations. Therefore, when processing high-temperature materials like PP, PA, and PET, it is essential to select pigments with good heat resistance and consider their heat endurance during the processing stage to ensure color stability during both manufacturing and usage.
In summary, to effectively address the issue of product fading in molded plastic factories, it is necessary to consider multiple aspects, including the lightfastness of colorants, the light resistance of resins, and the heat resistance of pigments. By scientifically selecting materials and designing reasonable formulations, the color stability and durability of products can be significantly enhanced.
DAYIN Plastics Co., Ltd. specializes in home appliance mold manufacturing and offers OEM/ODM services. As a comprehensive manufacturing solution provider, the company focuses on R&D and manufacturing services. Its in-house products include robotic vacuum cleaners, plastic tableware, and electronic dartboards. With 30 years of mold development experience, over 50 R&D personnel, and more than 100 injection molding machines, DAYIN Plastics is committed to providing high-quality manufacturing services and creating value for its customers.