Inter-ply, low-melt yam insertion improves a carpet's resistance to foot traffic, i.e., its resistance to matting. In addition, low-melt yam insertion improves the individual tuft's tip definition in untrafficked carpet and increases its body, i.e., gives it a better showroom appearance. Negatively, the same factors providing these benefits—better inter-ply co hesion and tuft integrity—also give the carpet a slightly harsher feel or hand.
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