Ultrallan彈性體顏色
Ultrallan Elastomer color
材料剛做出來的彈性體與NDI一樣，初始是不透明乳白色，被紫外線照射或者援慢氧化后會變成褐色，隨著時間延長逐漸變成棕黑色，并且受光部分和不受光部分會有明顯的色差，如果想保證顏色均一，需要過一段時間調整下產品面。簡單來講，自然變色是Ultrallan區別于普通聚氨酷材料的顯著特征，變色且最終為褐色的才是Ultrallan或NDI彈性體。變色不會引起物性、特性的變化。
注：以下示意圖顯示了Ultrallan放置在室外日光直射下的變色過程
變色不會引起物性、特性的變化
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