Hauv kev lag luam ntim khoom noj, kev xaiv cov khoom siv yas ncaj qha cuam tshuam rau kev nyab xeeb, kev tswj hwm tus nqi, thiab kev sib tw ua lag luam. Kev ua raws li cov qauv kev nyab xeeb hauv lub tebchaws, thaum ntsuas tus nqi sib npaug -kev ua tau zoo thiab tsim nyog rau ntau daim ntawv thov, yog qhov tseem ceeb rau kev lag luam ua tiav. Raws li cov khoom lag luam tseem ceeb thiab cov qauv kev lag luam, cov ntaub ntawv yas hauv qab no yog cov kev xaiv zoo, sib npaug ntau yam kev xav tau.
PP (polypropylene) yog cov khoom siv tseem ceeb nrog kev ua haujlwm zoo tshaj plaws, suav tias yog "tus huab tais ntawm tus nqi-kev ua tau zoo" hauv kev lag luam ntim khoom noj. Raws li cov khoom noj khoom haus - qib cov khoom muaj kev nyab xeeb, nws khav theeb zoo heev tshuaj lom neeg ruaj khov, tso tawm tsis muaj tshuaj lom, thiab muaj zog tiv thaiv tshav kub, tiv taus kub ntawm 100-130 degree. Qhov no ua rau nws tsim nyog rau cov ntawv thov tseem ceeb xws li kev xa zaub mov kub thiab cua sov microwave. Nws kuj tseem tiv taus brittleness ntawm qhov kub thiab txias, ua rau nws muaj ntau yam. Hais txog tus nqi, lub ntiaj teb tus nqi nruab nrab ntawm PP raw khoom yog tus nqi pheej yig, kwv yees li $ 1054 ib tuj nyob rau lub Peb Hlis 2025, thiab nws cov khoom siv hluav taws xob yog nruab nrab. Ua ke nrog automated ntau lawm kab, qhov no ntxiv txo qhov poob. Nws hauv qab yog cim "PP5," uas yog qhov pom tau zoo rau cov neeg siv khoom, ua rau nws zoo tagnrho rau cov thawv ntim khoom noj uas feem ntau siv rau kev nqa tawm thiab ntim khoom noj hauv tsev, suav txog ntau dua 70% ntawm kev lag luam.
PE (polyethylene) yog ib qho zoo tagnrho ntxiv rau cov nqi qis - cov ntawv thov, faib ua HDPE thiab LDPE. HDPE muaj cov tshuaj lom neeg muaj zog thiab muaj zog txaus, haum rau ua cov ntim ntim thiab cov thawv ntim khoom noj qhuav. Nws cov nqi zoo ib yam li PP, thiab nws cov khoom siv hluav taws xob tsawg dua, txuag cov nqi hluav taws xob hauv cov txheej txheem ntau lawm. LDPE muaj qhov yooj yooj yim thiab siab pob tshab, nrog rau qhov kub thiab txias ntawm kwv yees li 80 degree, haum rau cov ntim ntim xws li cov khoom noj txias thiab cov thawv ntim ntses. Tus nqi raw khoom yog tus nqi pheej yig, ua tau raws li qhov xav tau ntawm tus nqi qis -kawg lag luam. Ob qho khoom siv PE ua raws li GB 4806.7-2023 tus qauv, ua kom muaj kev nyab xeeb. Qhov tsis zoo yog txwv tsis pub muaj cua sov, yuav tsum tau sau meej meej ntawm kev siv qhov kub thiab txias kom tsis txhob siv tsis raug rau hauv cov ntawv thov zaub mov kub.
PET (polyethylene terephthalate) yog qhov tsim nyog rau kev ntim khoom noj txias uas qhov kev zoo nkauj yog qhov tseem ceeb. Nws muaj cov pob tshab siab heev thiab muaj zog hardness, qhia meej cov khoom xyaw xws li txiv hmab txiv ntoo thiab zaub xam lav, txhim kho cov khoom zoo. Nws hauv qab yog cim "PET1," yooj yim pom los ntawm cov neeg siv khoom. Txawm hais tias nws qhov kub tsis kam tsuas yog qis dua 60℃thiab nws tsis tuaj yeem microwaved, cov khoom siv raw khoom ruaj khov, ua rau nws tsim nyog rau kev tsim cov txiv hmab txiv ntoo thiab cov khoom noj txom ncauj. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias PET rov ua dua tsuas yog tso cai rau cov ntim khoom noj uas siv cov txheej txheem rov ua dua lub cev tshwj xeeb thiab yuav tsum dhau qhov kev sim nruj me ntsis rau acetaldehyde, tag nrho kev tsiv teb tsaws, thiab lwm yam. Cov nqi ua raws yog siab, yog li nws tau pom zoo kom ua qhov tseem ceeb ntawm PET hauv thawj theem.
PS (polystyrene) tuaj yeem yog tus nqi qis - kev xaiv tshwj xeeb rau cov khoom noj txias. Nws muaj cov pob tshab siab thiab zoo moldability, thiab nws cov nqi qis dua PP thiab PET, ua rau nws haum rau ntim cov tais diav xws li zaub xam lav thiab sushi. Txawm li cas los xij, nws siv rau hauv cov ntawv thov zaub mov kub yuav tsum tau zam nruj me ntsis, vim nws qhov kub tsis kam tsuas yog 70-90 degree. Qhov kub thiab txias tuaj yeem ua rau nws yooj yim muag thiab tso tawm cov khoom tsis zoo, thiab nws yooj yim rau brittleness ntawm qhov kub thiab txias. Cov kev txwv kev siv yuav tsum tau cim kom meej meej ntawm cov khoom, thiab pheej yig foamed versions yuav tsum raug zam kom tswj tau cov qauv kev nyab xeeb khoom noj.
Thaum ua lag luam ntim khoom noj khoom haus, xaiv cov khoom siv yuav tsum tau ua tib zoo khi rau daim ntawv thov thiab kev ua raws cai. Ua ntej PP cov khoom siv los npog cov kev xav tau ntawm cov khoom noj kub kub; siv PE, PET, thiab PS raws li xav tau los ntxiv cov ntawv thov tshwj xeeb thiab tswj cov nqi tag nrho. Tsis tas li ntawd, nws yog ib qho tseem ceeb kom ntseeg tau tias cov ntaub ntawv muaj zaub mov- ntawv pov thawj qib thiab ua raws li GB 4806.7-2023 tus qauv, zam cov ntaub ntawv tsis zoo los xyuas kom muaj txiaj ntsig thaum tswj kev nyab xeeb.
