Yenziwe ngezinto ezithambile (i-PP copolymer) lokhu kuyenza icishe inganqamuki.Ngisho nasebusika obubandayo impahla ihlala iqinile futhi iguquguquka.Lesi siphakeli sinokuvalwa kwesnap okuphumelelayo okulula ukukukhiya ukuvikela ukuchitheka kwengozi.