Keeb kwm ntawm lub khob ntawv tau nthuav tawm hauv plaub theem:
Conical / Pleated Paper Cups: Cov khob ntawv ntxov tshaj plaws yog conical hauv cov duab thiab xuas tes ua; lawv tau tuav ua ke los ntawm cov nplaum, nws tuaj yeem sib nrug, thiab yuav tsum tau siv tam sim ntawd. Tom qab ntawd, pleated ntawv khob tau qhia; pleats tau ntxiv rau lub sidewalls kom muaj zog thiab durability. Txawm li cas los xij, cov qauv luam tawm ntawm cov pleated saum npoo no tau ua pov thawj nyuaj thiab tau txais txiaj ntsig zoo tshaj plaws.
Wax-Coated Paper Cups
Xyoo 1932, thawj ob -dawb daim ntaub-coated ntawv khob tau qhia. Nws du nto tso cai rau kev luam ntawv ntawm cov qauv zoo, txhim khu kev txhawb nqa. Wax txheej tau txais ntau lub hom phiaj: nws tiv thaiv kev sib cuag ncaj qha ntawm cov dej haus thiab cov ntawv, tiv thaiv cov nplaum nplaum los txhim kho cov kav ntev, thiab cov phab ntsa tuab ntxiv - yog li ua kom lub khob muaj zog. Qhov no tso cai rau txo cov ntawv siv hauv kev tsim cov khob khov kho, txo cov nqi tsim khoom.
Raws li siv quav ciab-coated khob tau dhau los ua tus qauv rau cov dej haus txias, muaj lub siab xav ua kom yooj yim rau cov dej kub. Txawm li cas los xij, cov dej kub kub ua rau cov txheej hauv cov quav ciab yaj, ua rau kev sib cais ntawm cov nplaum nplaum; yog li ntawd, tus qauv siv quav ciab-coated khob tsis haum rau cov dej kub.
Ncaj-Walled Ob-Txheej khob
Txhawm rau nthuav dav ntau yam ntawm cov ntawv thov, ncaj- phab ntsa ob - cov khob ntawv txheej tau tsim tawm xyoo 1940. Cov khob no tsis yog siv tau xwb tab sis kuj tsim nyog rau cov dej kub. Tom qab ntawd, cov neeg tsim khoom siv txheej txheej latex los npog lub "daim duab los qhia" uas muaj nyob rau hauv cov ntaub ntawv thiab los txhim kho cov dej tsis kam. Ib qho - txheej wax-coated khob kho nrog latex tau dav siv rau kas fes kub hauv tus kheej - kev pabcuam vending machines.
Polyethylene-Coated Paper Cups
Qee lub tuam txhab ua zaub mov tau pib txheej txheej ntawv nrog polyethylene los txhim kho qhov thaiv thiab kev sib khi ntawm cov ntawv ntim. Vim hais tias lub melting point ntawm polyethylene yog ho siab dua li ntawm wax, hom tshiab ntawm cov dej haus khob no zoo tagnrho rau cov dej qab zib, zoo daws teeb meem zoo los ntawm melting ntawm cov ntaub ntawv txheej. Nyob rau tib lub sijhawm, cov txheej txheem polyethylene yog smoother dua li cov ntaub ntawv qub, txhim kho cov tsos ntawm daim ntawv khob. Tsis tas li ntawd, txoj kev ua yog pheej yig dua thiab sai dua li cov txheej latex.
