PU bụ mbiri nke Polyurethane, na aha Chinese bụ Polyurethane.
Ihe mejupụtara akwa akwa akwa na-abụkarị ihe nkwado (teepu mpempe akwụkwọ), pad absorption na akwụkwọ iche, kewara n'ụdị iri dịka nha dị iche iche.Ngwaahịa kwesịrị ịdị ọcha.
Band-enyemaka bụ teepu ogologo jikọtara ya na gauze ọgwụ n'etiti, nke a na-etinye na ọnya ahụ iji chebe ọnya ahụ, kwụsị nwa oge na-agba ọbara, na-eguzogide ọgwụ nje bacteria ma gbochie ọnya ahụ ka ọ ghara imebi ya ọzọ.
A na-eji ngwaahịa ahụike eme ihe na-adịghị akwa ákwà, mmanya ọgwụ 70%.