Khoom ua si dag muaj 3 txheej ntawm cov khoom. Lub hauv paus txheej txheem yog ua los ntawm cov av txheej txheem compacted, gravel txheej thiab asphalt los yog qhob cov txheej txheem. Lub hauv paus txheej yuav tsum muaj cov khoom, tsis yog-deformable, du thiab impermeable, ie kev kawm ntau pob zeb. Raws li hockey teb thaj tsam, kev tsim kho yuav tsum muaj kev pom zoo nrog puag txheej, los tiv thaiv kev pab cuam. Yog cov txheej txheem qhob, cov pob zeb thaiv kom hlais cov pob qij txha tawm, kom tiv thaiv thermal expansion thiab kab nrib pleb.
Cov txheej hauv qab yog saum toj txheej cov txheej txheem, feem ntau yog cov roj hmab lossis ua npuas dej. Roj hmab ywj nrawm nruab nrab, lub thickness ntawm 3 ~ 5 hli. Tus nqi ua npuas yog tsawg, tab sis lub elasticity yog pluag, lub thickness ntawm 5 ~ 10 hli, tuab nyom dhau heev lawm, thiab yooj yim rau kev nyuaj siab; dhau nyias nyias, tsis tuaj yeem ua kom tsis muaj teebmeem. Cov txheej txheej yuav tsum tau muab tso rau ntawm txheej puag, feem ntau nrog dawb latex los yog nplaum ua ke nplaum.
Qhov thib peb txheej, kuj ntog txheej, rau cov txheej nyom. Raws li lub chaw ua hauj lwm ntawm qhov zoo ntawm fluffy turf, round curled nylon silk turf, leafy polypropylene fiber turf, nylon filament npaj puff thiab li on. Cov txheej txheem no tseem yuav tsum tau muab cov roj hmab los yog cov npuas yas rau ntawm latex. Kev tsim kho yuav tsum muaj qhov siab, ua raws li nias nris, tsis tuaj yeem hlawv.
2, turf fiber tuab, 20 ~ 24 hli, uas tau sau nrog quartz yuav luag rau sab saum lub tshuab fiber ntau.
