Keeb kwm ntawm lub khob ntawv mus txog plaub theem: conic / pleated ntawv khob thawj lub khob ntawv yog conic, ua los ntawm tes, glued ua ke, yooj yim rau kev sib cais, thiab yuav tsum tau siv sai li sai tau.Tom qab ntawd, folding khob tau ntxiv rau sab phab ntsa kom muaj zog ntawm cov phab ntsa sab nrauv thiab cov kav ntev ntawm lub khob, tab sis nws yog ib qho nyuaj rau luam cov qauv ntawm cov folding nto, thiab cov nyhuv tsis zoo heev.Waxed Paper Cup nyob rau xyoo 1932, thawj ob lub khob ntawv khob tau tawm los, nws lub ntsej muag du tuaj yeem luam tawm ntawm ntau yam qauv zoo nkauj, txhim kho kev txhawb nqa.Ntawm qhov tod tes, cov wax txheej ntawm lub khob ntawv tuaj yeem zam qhov kev sib cuag ncaj qha ntawm cov dej haus thiab cov khoom siv ntawv, thiab tuaj yeem tiv thaiv cov nplaum nplaum thiab txhim khu kev ua haujlwm ntawm lub khob ntawv;ntawm qhov tod tes, nws kuj ua rau lub thickness ntawm sab phab ntsa, yog li ntawd lub zog ntawm daim ntawv khob yog heev txhim khu kev qha, yog li, daim ntawv noj tsim nyog rau kev tsim muaj zog daim ntawv khob yog txo, thiab cov nqi ntau lawm yog txo.Raws li waxed ntawv khob ua ntim rau cov dej txias, tib neeg kuj cia siab tias yuav siv lub thawv yooj yim rau cov dej kub.Txawm li cas los xij, cov dej qab zib kub yuav yaj cov wax nyob rau sab hauv ntawm lub khob, nplaum lub qhov ncauj yuav raug muab cais tawm, yog li cov ntaub ntawv siv quav ciab-coated ntawv khob tsis haum rau tuav cov dej kub.
Ncaj-phab ntsa ob-txheej khob, txhawm rau nthuav dav ntawm daim ntawv thov, xyoo 1940, ncaj-phab ntsa ob-txheej khob tau qhia rau lub khw.Lub khob ntawv tsis yog tsuas yog yooj yim nqa, tab sis kuj tuaj yeem siv los tuav cov dej kub.Tom qab ntawd, cov tuam txhab tsim khoom hauv cov khob no coated nrog cov latex los npog cov ntaub ntawv nrog "Cardboard ntxhiab" thiab ntxiv dag zog rau cov ntawv khob dej.Ib txheej wax khob coated nrog latex yog dav siv nyob rau hauv vending machines los tuav kub kas fes.Coated ntawv khob, qee lub tuam txhab khoom noj tau pib polyethylene coated rau ntawm daim duab los qhia kom muaj kev thaiv thiab kev sib khi ntawm cov ntawv ntim.Vim hais tias lub melting point ntawm polyethylene yog ntau dua li ntawm wax, hom tshiab haus ntawv khob coated nrog polyethylene yuav siv tau los tuav cov dej kub.Nyob rau tib lub sijhawm, polyethylene txheej dua li cov ntaub ntawv qub txheej du, txhim kho cov tsos ntawm daim ntawv khob.Tsis tas li ntawd, nws cov cuab yeej ua haujlwm ntau dua li kev siv cov txheej txheem latex yog pheej yig dua thiab sai dua.
Post lub sij hawm: Jun-01-2023