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可变色粘合剂可提高UV固化的精度 - China Medical Device Manufacturer
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Wed, January 17th, 2018

2008年1/2月CMDM电子快讯 » 技术新知
可变色粘合剂可提高UV固化的精度

Dymax公司采用Ultra-Red技术生产的粘合剂在紫外光下发出红色荧光,可与多数塑料产生对比效果,这有助于检测粘合剂确切位置,识别可能的泄漏。
紫外光(UV)固化用于粘合领域已有30多年的历史,工程师常常会有两个疑问:怎样才能知道在预定区域涂抹了足够的粘合剂?怎样知道这些粘合剂何时能完全固化?

粘合剂和光固化系统供应商Dymax公司经过几年的内部研究和测试,开发出了两项着色技术See-Cure(可见固化)和Ultra-Red Fluorescing(红外线荧光)有助于最终解决上述问题。

传统固化是将透明粘合剂用于透明塑料,并等待测试结果,确定粘合剂的使用量是否合适,以及是否完全固化。See-Cure呈蓝色,因此使用时可轻易鉴别。随着粘合剂逐渐固化,蓝色渐渐褪去,当其完全固化时,即变得透明。Dymax公司全球营销高级副总裁 Richard Golebiewski 称:See-Cure变色产品可用作固化指标,它将使工程师们能够精确排序、精确计时,并极大的提高了速度。使用粘合剂时,他们可以此作为绝对可见的验证方法。其颜色不会对产品的灭菌或生物相容性产生影响。

几年前,公司启动了一项内部研究和开发项目,以探索UV固化的可视化方案,当时发现在原材料方面并没有足够的技术可以确保该项目成功。Golebiewski称,公司曾在欧洲试图生产可变色固化粘合剂,但最终失败了。Golebiewski 说:旧的技术不能保证其100% 的准确性。主要问题与颜色恢复以及颜色褪去但产品并没有固化有关。他说,未固化的粘合剂是有毒的,并能导致元件产生故障。Golebiewski 补充道:我们肩负的责任重大,这关乎人命。这也是我们将See-Cure称为第一种实用的可见固化指标的原因。

See-Cure并不意味着取代其它的固化验证工艺,但它可以将工程师和制造商使用粘合剂、固化粘合胶时的精确度和可信度提高到一个新水平,并最终能保证粘合的精确性和安全性。这些蓝色的粘合剂产生的波长与透明粘合剂不同,这可以通过检测设备进行分析。See-Cure的安全性是基于粘合剂完全固化后颜色改变时间的精确设置。

Dymax 公司开发Ultra-Red顺应了另一类客户需求:使用粘合剂时,更简单的粘合区域视觉检测法。当暴露于紫外光下时,粘合剂通常呈透明,且大多数塑料可发出蓝色荧光。公司还提供透明或蓝色荧光粘合剂,但当其用于如PVC 或 PET等蓝色荧光塑料时便难以鉴别或检测。Golebiewski称:Ultra-Red可提供充分的对比,这是检测细微的泄漏或粘合剂位置所必需的。


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