Muaj ntau ntau hom khoom siv rau lub hnab hauv paus, feem ntau yog:
(1) Hlau phaj: Hlau daim hlau yog qhov nyuaj thiab hnav- tiv taus, tab sis hnyav heev. Hom lub hauv paus no tsuas yog siv rau cov hnab loj.
(2) Polyethylene phaj: Polyethylene daim hlau yog lub teeb, elastic, thiab mos, tab sis lawv daj thiab deform raws sij hawm, yuav tsum tau hloov ntau zaus.
(3) PPR phaj: PPR daim hlau yog ib puag ncig tus phooj ywg thiab noj qab nyob zoo, txo lub hnab hnyav. Lawv kuj hloov tau yooj yim thiab tsis yooj yim deformed, tab sis kuj kim heev.
(4) ABS phaj: ABS phaj yog hom tshiab ntawm lub hnab ntim khoom. Nws yog me ntsis kim dua, tab sis muaj qhov zoo xws li hnav tsis kam, dej thiab roj tsis kam, thiab siab toughness. Yog li ntawd, nws yog feem ntau siv rau siab - kawg hnab hauv paus.
