II. Yuav Ua Li Cas
Khoom siv
Kev ua ibkev cai ice cream khobpib nrog covxaiv cov khoom siv raw. Peb xaivqib zaub mov zooyas los yog ntawv cov khoom ua raw khoom los xyuas kom meej cov khoom muaj kev ruaj ntseg thiab kev tiv thaiv ib puag ncig. Cov ntaub ntawv raw yog nruj me ntsis soj ntsuam thiab ua tau raws li lub teb chaws thiabcov qauv thoob ntiaj teb, kom cov neeg siv khoom tuaj yeem txaus siab rau cov dej khov nab kuab zoo tib lub sijhawm, tab sis kuj so kom paub tseeb tias lawv tuaj yeem siv tau.
Raw khoom muaj pes tsawg leeg ntawmluam ntawv khobfeem ntau cuam tshuam nwsdurability thiab kev nyab xeeb. Piv txwv li, qee lub khob ntawv siv cov zaub mov-qib paraffin wax ua txheej, uas yog hu ua khob waxed. Txawm li cas los xij, vim tias qhov melting point ntawm paraffin wax tsawg, nws yog ib qho yooj yim rau yaj hauv dej kub, thiab nws yog ib qho yooj yim los ua ib qho nyuaj thiab nkig ntawm qhov kub thiab txias, yog li lub khob waxed feem ntau tsuas yog tsim rau cov dej txias. Lub khob coated siv polyethylene (PE) ua cov txheej txheej, vim tias muaj zog tiv thaiv tshav kub ntawm polyethylene, lub khob ntawv no tuaj yeem siv los tuav cov dej kub, tab sis kuj tuaj yeem tuav dej txias lossis dej khov.
Tsis tas li ntawd, cov khoom ntawm lub khob ntawv kuj yuav cuam tshuam rau nwsthermal rwb thaiv tsev kev ua tau zoo. Cov khob ntawv siv rau cov dej haus kub feem ntau yog ua los ntawm cov ntaub ntawv tuab tuab uas tuaj yeem tiv taus qhov kub thiab txias thiab tuaj yeem ntxiv nrog ib txheej ntawm emulsion lossis lwm txheej txheej los txhim kho rwb thaiv tsev. Qhov kev tsim no ua kom lub thawv tsis deform lossis ntub dej thaum raug kub hnyiab, yog li tswj kom zoo dua qhov kub ntawm cov dej haus thiab tiv thaiv kev kub nyhiab.
Intsos, txawv cov ntaub ntawv ntawmtus kheej lub khob khov nab kuabkuj txawv. Coated khob feem ntau muaj ib tug smoother nto, thaum waxed khob yuav siv sij hawm ib tug me ntsis kev ntxhib los mos vim muaj ib tug ciab txheej.
Nws yuav tsum raug sau tseg tias txawm hais tias cov khob ntawv no txawv ntawm cov khoom siv, lawv yog cov khoom siv pov tseg, haum rau cov chaw pej xeem, tsev noj mov, tsev noj mov thiab lwm yam scenes. Thaum xaiv covzoo tshaj plaws ice cream khob, ntxiv rau kev txiav txim siab nws cov khoom siv thiab kev ua haujlwm, nws yuav tsum tau them sai sai rau nwsmanufacturers thiab cov khoom zookom ntseeg tau tias kev yuav khoom muaj kev nyab xeeb thiab huv.
