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2020
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What causes uneven color in hollow-core boards?
Hollow-core boards are currently used in many different industries. However, those who frequently work with hollow-core boards may have noticed that some of them have uneven color shades, and some even exhibit white spots. So what causes the color inconsistencies in hollow-core boards?
The color of hollow-core boards doesn't significantly affect their practical functionality, so many customers don't pay much attention to the issue of uneven coloring in these boards. However, the primary cause of this phenomenon lies in the production process.
1. During the production of hollow boards, inconsistent cooling rates can lead to variations in color intensity. Therefore, it is crucial during the manufacturing process to ensure as much as possible that the cooling rates remain uniform across all parts. For parts with relatively uniform wall thicknesses, effective control of both material temperature and mold temperature is essential. As for parts with significant differences in wall thickness, colorants can be used to mask any resulting color variations!
2. The resin turns white when subjected to impact. Since hollow board contains resin-based materials, areas of the hollow board that experience pressure, processing, cutting, or other forms of impact are prone to turning white—this is precisely why white spots appear!
3. Plastics or colorants generally exhibit poor thermal stability, and colorants may show undesirable diffusion behavior. This can easily lead to phenomena such as pattern formation near the gate. To ensure uniform coloration of hollow boards, it is essential to strictly control fixed production conditions—particularly the amount of material, material temperature, and production cycle!
4. Some hollow-board components have particularly unique shapes, which can significantly affect the filling of the plastic. If the filling is uneven or insufficient, it may result in variations in color intensity!
Overall, the variation in color among hollow-core panels is primarily caused by the manufacturing process. Although this does not affect the panels' functionality, it can still have some impact on their appearance. Therefore, hollow-core panel manufacturers need to further enhance their production processes. Currently, Yourong Technology is capable of customizing high-quality hollow-core panels in a wide variety of colors on a large scale. Customers in need are welcome to get in touch for more information!
For more information on Ningbo hollow boards and related content, please stay tuned to the updated website of Zhejiang YORO Packaging Technology Co., Ltd.: www.nbyrbz.cn; Service hotline: 18958381786.
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