1. Qhov saum npoo ntawm cov yeeb nkab tuaj yeem coated nrog cov txheej tshwj xeeb los tiv thaiv hluav taws xob tiv thaiv cov yeeb nkab dej. Ib yam li cov tshuaj pleev thaiv hnub peb siv rau lub caij ntuj sov. Siv cov txheej txheem tiv thaiv hluav taws xob rau ntawm qhov chaw ntawm cov yeeb nkab dej los tiv thaiv cov yeeb nkab dej thiab txo cov kev laus zuj zus los ntawm ultraviolet rays.
2. Siv cov kav dej zoo tib yam los tiv thaiv cov npuas dej. Nws yog khi ib txheej ntawm cov npuas dej dub rau sab nraud ntawm cov kav dej. Qhov no yog ib qho cuab yeej siv rau kev tiv thaiv cov kav dej thiab tseem siv rau hauv kev tsim kho lub caij ntuj no.
3. Nws yog pasted nrog lub teeb aluminium foil daim kab xev, uas muaj viscosity zoo, muaj zog adhesion thiab anti-aging. Piv nrog ua npuas ncauj, nws zoo li zoo dua, tab sis tus nqi kuj yog siab dua.
4. Cov raj PP-R yog qhov ua rau muaj kev laus thiab degradation nyob rau hauv cov hluav taws xob ultraviolet ntev, yog li lawv yuav tsum tau muab qhwv nrog txheej tiv thaiv tsaus ntuj thaum ntsia sab nraum zoov lossis hauv qab tshav ntuj ncaj qha.
Thaum siv cov kav dej PPR rau kev kho kom zoo nkauj hauv tsev, nws yog feem ntau pom zoo kom siv zais kev teeb tsa. Tau kawg, kev tiv thaiv yuav tsum tau ua. Kev zais zais tsis tuaj yeem tsuas yog txo qhov ncaj qha ultraviolet rays nyob rau lub caij ntuj sov, tab sis kuj txo qhov muaj peev xwm ntawm frostbite nyob rau lub caij ntuj no.
