Adjective
unplasticized (not comparable)
Not plasticized.
Some typical examples include around 15 to 20% loading of chalk in unplasticized polyvinyl chloride (uPVC) drain pipe, 5 to 15% loading of stearate coated chalk or marble in uPVC window profile. Source: Internet
An uPVC, or unplasticized polyvinylchloride, is used for things such as pipes. Source: Internet