ʻO PP, i kapa ʻia ʻo polypropylene, he polymer i hana ʻia me ka polypropylene plus alkene reaction, he mea waxy keʻokeʻo, ʻike a māmā i ka helehelena.ʻO ke kumu kemika ʻo (C3H6)x, ʻoi aku ka nui o 0.89-0.91g/cm3, hiki ke puhi ʻia, wahi hoʻoheheʻe 165 ℃, palupalu ma 155 ℃, hoʻohana i ka pae wela -30～140 ℃.Ma lalo o 80 ℃ hiki ke pale i ka corrosion o ka waikawa, ka alkali, ka wai paʻakai a me nā ʻano mea hoʻoheheʻe organik, hiki ke decomposed ma lalo o ka hopena o ka wela kiʻekiʻe a me ka oxidation.Hana ʻia nā bristles pp me ka polypropylene, ʻaʻole hiki ke maʻalahi, ʻaʻahu-kū ʻole a emi ʻole ka hoʻohaumia ʻana ma mua o ka pbt, a no laila hoʻohana ʻia i nā pulupulu hoʻomaʻemaʻe haʻahaʻa.

ʻOiai he ʻuʻuku loa nā bristles pp, hiki ke hoʻohana ʻia e wehe i nā papa kaapuni, no ke aha?No ka mea, ua hoʻokau ʻia ʻo pp ponoʻī, inā hui pū me ka toner conductive kiʻekiʻe, he lima maikaʻi ia no ka wehe ʻana i ke au.