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UVLED固化原理

2023-01-10

Tianhui

所谓UVLED固化就是在特殊配方的树脂中加入光因。 UVLED光固化装置吸收高强度紫外光后，产生活性自由基或离子基，引起聚集、交联和支化反应，使树脂反应器使树脂（UV涂料、油墨、粘合剂等）在几秒钟内从液态变为固态。 UVLED固化材料的物理性能本质上受UV光固化机的影响。预期的性能，无论是保护胶水、油墨还是粘合剂，都将取决于这些固化机中LED芯片的参数、设计和控制方法。 LED芯片的四个关键参数是：1.UV辐射（或密度）2. 光谱分布（波长） 3. 辐射（或紫外线能量） 4. 辐射热是相对于大的辐射或辐射量而言的，不同的、不同的UVLED光谱、油墨和保护胶会表现出截然不同的特性。能够识别不同的LED芯片特性并使其与固化材料的光学特性相匹配，扩大UVLED固化范围作为一种快速高效的生产工艺。影响固化效果的固化体系有很多光学和物理特性，导致UV固化材料的外观特性存在差异。相关参数对UV固化质量的影响 1. UVLED机台波长：365nm波段的光谱适用于普通光固化油墨（不适用于冰花、皱纹等特殊光谱要求的油墨）。有的UV机由于LED芯片的影响过大，会影响光固效果。建议客户在选择UV光固设备时进行光固测试，测试UV机的波长是否满足光固要求。 2. UVLED机器的功率：一般UV光学油墨需要的功率为80-120MW/CM，吸收光能约为2000-3000mJ/cm。过多的光能会导致墨水变脆。低 - 低光实体效果。应用实例紫外光辐射物理性质与可见光相似，都是线性的，但其穿透力远不如可见光。波长越短，穿透力越差。内部固化，透光性更好。 1. 紫外光产生紫外线的同时产生一定的红外辐射热。这种辐射发热有利于温度小的工件。预计效果会更加明显。应用实例：木地板、金属制品等的UV漆；印刷电路板中的紫外线绝缘涂料；玻璃制品中的UV胶。 2. 对温度的影响比较敏感或耐温性差的耐温化学零件。降低IR辐射热是世界各国UV固化设备的前沿课题之一。一般采用水冷、反射、频率滤波等方法。解决了，但代价是必须损失的紫外光功率。应用实例：各种PVC（如IC卡）、塑料薄膜、柯（插座）UV油印刷、纸张特种印刷（冰花）、电脑键盘印刷。

UVLED固化原理 1

作者: 天慧- 空气消毒

作者: 天慧- 紫外线发光二极管制造商

作者: 天慧- 紫外线水消毒

作者: 天慧- 紫外发光二极管解决方案

作者: 天慧- 紫外发光二极管

作者: 天慧- 紫外发光二极管制造商

作者: 天慧- 紫外发光二极管模块

作者: 天慧- 紫外发光二极管打印系统

作者: 天慧- 紫外线发光二极管捕蚊器

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