Cov khoom siv degradable yog cov yas uas nws cov qauv tshuaj hloov pauv hauv ib puag ncig tshwj xeeb ua rau kev ua haujlwm poob hauv ib lub sijhawm tshwj xeeb.Cov khoom ntim yas degradable muaj qhov ua haujlwm thiab cov yam ntxwv ntawm cov yas yas.Los ntawm kev ua ntawm ultraviolet lub teeb los yog cov kab mob ntawm cov av thiab dej, kev faib, degradation thiab txo qis, thiab thaum kawg rov nkag mus rau hauv ib puag ncig ecological nyob rau hauv daim ntawv tsis muaj tshuaj lom thiab rov qab mus rau qhov xwm txheej.
Cov khoom siv raw ntawm daim ntawv yog cov nroj tsuag fiber ntau, uas yuav rot sai sai hauv qhov xwm txheej, yuav tsis ua rau muaj kuab paug rau ib puag ncig, thiab tuaj yeem siv rau daim ntawv.Yog li ntawd, peb yeej ib txwm txhawb nqa lub hom phiaj ntawm kev tiv thaiv ib puag ncig ntsuab, txhawm rau tsim kom muaj kev koom tes zoo dua qub, muab rov qab rau lub zej zog ntawm xwm.Pulp molding khoom ntxiv rau lub teeb zoo, pheej yig, poob siab thiab lwm yam zoo nws kuj muaj huab cua zoo permeability, ua rau kev khaws cia ntawm cov khoom tshiab, nyob rau hauv cov khoom thoob ntiaj teb, yog dav siv hauv cov qe, txiv hmab txiv ntoo, iav khoom thiab lwm yam khoom tawg yooj yim, fragile, ntshai ntawm extrusion khoom turnover ntim.
Kev siv cov thawv ntim khoom tsis zoo thiab lub hnab ntim khoom yog peb cov kev taw qhia.Cov European Ntim thiab Ntim Cov Khoom Pov Tseg Cov Lus Qhia tau teev tseg tias cov ntsiab lus ntawm cov hlau hnyav (lead, mercury, aluminium, thiab lwm yam) thiab cov hlau lead yuav tsum tsawg dua 100PPM.Lub teb chaws yuav tsum raug txwv nyob rau hauv daim ntawv ntawm kev cai lij choj siv los yog txo cov kev siv ntawm ib co uas muaj hlau lead, mercury los yog txhuas thiab lwm yam teeb meem ntawm cov ntaub ntawv ntim, thiab hnyav hlau cov ntsiab lus, nyob rau hauv kev ua lag luam yog heev nrov pov tseg ua npuas ncauj noj su box kuj tsis tsuas tsis tuaj yeem rov ua dua tshiab, thiab faus hauv av rau lub sijhawm ntev, kom hlawv nws thiab ua rau muaj kuab paug rau ib puag ncig, yog li nws yuav tsum raug txwv.Yog li ntawv ntim ntawv tsis muaj teeb meem los ntawm qhov twg, piv nrog rau lwm cov khoom ntim, lub thawv ntim ntawv thiab hnab ntawv yog qhov kev xaiv zoo tshaj plaws.
Post lub sij hawm: Nov-08-2022