Ultrallan弹性体颜色

Ultrallan Elastomer color

材料刚做出来的弹性体与NDI一样,初始是不透明乳白色,被紫外线照射或者援慢氧化后会变成褐色,随着时间延长逐渐变成棕黑色,并且受光部分和不受光部分会有明显的色差,如果想保证颜色均一,需要过一段时间调整下产品面。简单来讲,自然变色是Ultrallan区别于普通聚氨酷材料的显著特征,变色且最终为褐色的才是Ultrallan或NDI弹性体。变色不会引起物性、特性的变化。

注:以下示意图显示了Ultrallan放置在室外日光直射下的变色过程

变色不会引起物性、特性的变化

Like NDI itself, the fresh Ultrallan* material is initially opaque opalescent white, which will turn brown after being irradiated by ultraviolet light or slowly oxidized, then will gradually turn black-brown over time. In addition, there will be obvious color difference between the light-receiving part and the otherwise. if the color uniformity is needed, the light-receiving surfaces shall be rotated evenly. In short, natural color-changing is the distinguishing feature of Ultrallan* from other ordinary polyurethane materials, in other words, genuine Ultrallan* or NDI elastomers all change their color and end up brown. However, color-changing does affect its physi-cal properties and characteristics.

The following diagram shows the color-changing pattern of the Ultrallan* when placed outside in direct sunlight

Color-changing does affect its physical properties and characteristics

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