Tibqaḍawin n tneqqen deg wamlalen n tnasidan, ed Polyuretan (PU) Tibqaḍawin n tneqqen s umani s tɣawsiwin-nsen n tɣawsiwin. Deg tmeɣrud ed n teẓṛan, anda yesɛa aɛewwi n uɣliyen n yiɣliḍ, Tibqaḍen n tnefken n PU ttbanen n ufewlen ay ttḥerṛen s waṭas n umahil ed tfaɣen. Tibqaḍawin n tnewwiyen n PU