Plastic coloring products can lose their vibrancy over time due to various factors. The fading of these products is closely tied to the lightfastness of pigments, dyes, as well as their oxidation resistance, heat tolerance, acid and alkali resistance, and the properties of the resins used. Depending on the processing conditions and intended use of the plastic products, the necessary attributes of pigments, dyes, surfactants, dispersants, carrier resins, and anti-aging additives can be chosen once the masterbatch is formulated.
1. **Lightfastness**: The lightfastness of a colorant plays a crucial role in determining how quickly a product fades. For outdoor items exposed to intense sunlight, the lightfastness rating of the colorant is a key consideration. A low lightfastness grade means the product will likely fade rapidly. For weather-resistant products, the lightfastness should be no less than six grades, with seven or eight being ideal. Indoor products might get by with a lower grade, around four or five. The carrier resin's lightfastness also significantly impacts color changes; UV exposure can alter the resin's molecular structure, leading to fading. Incorporating light stabilizers like UV absorbers into the masterbatch can enhance the lightfastness of both colorants and the plastic products themselves.
2. **Thermal Stability**: This refers to how much thermal weight loss, discoloration, and degradation pigments experience at processing temperatures. Inorganic pigments, such as metal oxides and salts, are highly thermally stable and heat-resistant. Organic pigments, however, undergo molecular changes and partial decomposition at higher temperatures. For products like PP, PA, and PET, where processing temperatures exceed 280°C, it’s vital to select pigments with excellent heat resistance and consider their heat-resistance duration, typically between 4 to 10 minutes. Certain metal ions in pigments can accelerate resin thermal decomposition. Pigments containing copper, manganese, iron, and cobalt have a pronounced aging effect on polyolefins, whereas those with potassium, sodium, cadmium, and calcium have less impact. Metal elements exhibit their aging effects in the sequence of pure metal, metal oxide, and metal salt.
3. **Oxidation Resistance**: Some organic pigments degrade gradually after undergoing macromolecular breakdown or other changes due to oxidation. This can happen during high-temperature processing or when strong oxidizing agents, like chromate in chrome yellow, are present. Using lake pigments, azo pigments, and chrome yellow together often leads to a gradual reduction in red tones.
4. **Acid-Alkali Resistance**: The fading of acid or alkali-stained plastic products depends on the chemical resistance of the colorants. For instance, molybdenum chrome red resists mild acids but is sensitive to alkalis, while cadmium yellow isn’t acid-resistant. When these pigments are combined with phenolic resins, they can severely diminish the heat resistance, weather resistance, and fading properties of colorants.
Understanding these factors helps manufacturers create more durable and visually appealing plastic products that maintain their color over time.
Gas Grill
Leading the Outdoor Cooking Trend
The Gas Grill, with its superior performance, convenient operation, and efficient cooking capabilities, is rapidly emerging as the top choice for outdoor barbecue enthusiasts. This gas-powered grill seamlessly blends modern technology with user-friendly design, delivering an unprecedented grilling experience that fills every outdoor gathering with laughter, joy, and delicious cuisine.
High-Performance Burning System
Equipped with an advanced gas-burning system, the Gas Grill ignites swiftly and burns steadily, providing a uniform and powerful heat source. Whether for quick searing or slow simmering, it handles it all with ease, ensuring every inch of your ingredients is evenly heated for a flavorful bite. Moreover, its high combustion efficiency translates to reduced energy consumption and quicker preheating times, smoothing out your grilling journey.
Intelligent Temperature Control Technology
To elevate your cooking experience even further, the Gas Grill boasts intelligent temperature control technology. With built-in temperature sensors and a smart control panel, you can effortlessly set and maintain your desired cooking temperature, eliminating the need for constant attention to the flames. Whether you crave a perfectly charred exterior with a juicy interior on your meats or delicate seafood with a nuanced flavor, the Gas Grill has got you covered.
User-Centric Design for Effortless Operation
The Gas Grill's design takes into account both user convenience and safety. A one-touch ignition system eliminates cumbersome lighting procedures, allowing you to fire up the grill in a jiffy. Its spacious cooking area and adjustable grate heights cater to various cooking needs for different ingredients. Additionally, the grill body is crafted from heat-resistant and corrosion-proof materials, ensuring stability and safety over extended use. Plus, the easily cleanable grill grates and body structure let you enjoy your meal without worrying about the cleanup afterward.
Made of high-quality stainless steel, it is sturdy and durable, anti-corrosion and anti-rust, and can easily cope with various outdoor environments.
Equipped with an efficient fire control system, it can be easily controlled whether it is high-fire fast roasting or low-fire slow simmering to meet your diverse needs for delicious food. The easy-to-clean design makes cleaning up after grilling quick and easy, saving you valuable time.
The safety ignition system ensures peace of mind every time you use it, allowing you to feel safe while enjoying your food. The multi-functional cooking area can satisfy all needs, whether it is grilled meat, grilled fish or grilled vegetables, making your barbecue party more colorful.
Typical industrial gas-fired furnace,Convenient barbecue experience,Efficient fire control, Family gathering equitments
Ningbo Yinzhou Weinuo Machinery Manufacturing Co., Ltd. , https://www.ovencraftpizza.com