How does the sole of the dust-free sleeve shoe turn yellow?
I received a call from a customer the previous week. The other person asked why the sole of the cleaned dust-free sleeve boots turned yellow. ? And the soles of a pair of shoes are not one color, one is white and one yellow. what happened?
First of all, I explained to the customer that the company cleaning steps are operated in accordance with the ISO9000 operating system. The goal is to have traceability at every step so that all companies can safely hand over the clothes to us for cleaning. The isolated purifying washing machine and dryer used for cleaning are equipped with corresponding procedures. The cleaning process is also strictly in accordance with sorting-pretreatment-dust-free cleaning-dust-free drying-folding inspection-cleanliness test-ESD test-purification packaging. - Delivery for operation.
So why do the soles turn yellow and the color of the soles of a pair of shoes is different?
The first one should be said from the material of the sole. The sole of the dust-free sleeve shoe is made of PU material. The disadvantage of the PU bottom is that it is easy to oxidize. As time goes by, the shoes will become yellower, but the color changes. Does not affect its anti-static properties. And it can't ignore its advantages due to its shortcomings (low density, soft and elastic texture, comfortable and light to wear, etc.)