Mats on vinyl flooring
Plasticizers are chemicals added to plastics, vinyl, and rubber to make them softer and more flexible. The softer or more flexible the material, the more plasticizer it contains. Since rubber mats are fairly flexible, they contain a lot of plasticizer. Over time, the plasticizers migrate out of the rubber or plastic and are absorbed into surrounding materials. They tend to stain. It's called "plasticizer migration".
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Last edited by rusty baker; 02-18-2011 at 04:28 PM.