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Different coloring methods for plastics
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Different coloring methods for plastics
In our daily life, we are exposed to a variety of plastic products , and these plastic products are various in color, bright and bright, which is inseparable from the dyeing technology of plastic products.
Plastic dyed thermoplastic materials are mostly transparent or milky white, while precision plastic parts often impose various requirements on color. Parts in optical instruments require black to prevent light leakage and stray light removal. Appearance parts are often used according to design needs. s color. Therefore, before the processing of plastic products, it is necessary to carry out dyeing, that is, mixing different proportions of dyes in plastics. The dyeing methods of thermoplastics are as follows:
Plastic product manufacturers talk about plastic dyeing methods in three categories: toner, color masterbatch, pumping, each type of dyeing method has its advantages and disadvantages, which one to choose, depending on the specific circumstances.
First, the toner
Advantages of toner: 1, cheap, affordable. 2, the proofing time is short, the production is fast, and the desired color can be quickly completed. 3. Easy transportation. 4. Suitable for a small variety of products.
Disadvantages of toner: 1. When the toner is stirred, the pollution is large, and the mixing drum is not easy to clean. 2, different raw materials, different brands or batch numbers and operating conditions are different, machine and mold different operating temperature differences, different ways, will produce color difference. 3. Poor dispersion.
Second, the color master
Color master benefits: 1, the color is more stable. 2, will not pollute the environment. 3, the price is moderate, the inventory is small. 4. Good dispersion. 5, suitable for central feeding system, long-term orders.
Color master defects: 1, must have a certain amount of production, the proportion of addition is generally 2--4%. 2, must be evenly distributed to prevent static electricity or otherwise produce chromatic aberration.
Third, pumping
Advantages of pumping: 1. The color is stable, and the impurities of raw materials are eliminated. 2, the operation is simple, no need to stir the material, can greatly increase the production capacity. 3. Do not pollute the environment. 4, can be directly produced.
Disadvantages of pumping: 1. Cost is higher than color masterbatch and toner. 2. During the pumping process, the physical properties of the raw materials may be reduced. 3. Large inventory and high transportation costs.