Txoj kev loj hlob ntawm sawv ntsug-cov hnab ntim tuaj yeem taug qab rov qab mus rau theem kev hloov kho tshiab ntawm kev lag luam ntim khoom lag luam hloov pauv hauv nruab nrab - txog - lig xyoo pua 20th. Nyob rau lub sijhawm ntawd, cov iav fwj thiab cov kaus poom hlau tau maj mam hloov los ntawm lub teeb yuag, thiab cov yeeb yaj kiab yas sib xyaw tau los rau hauv kev siv dav. Tawm tsam qhov keeb kwm yav dhau los no, cov kws tshaj lij tau sim ntxiv cov gussets lossis cua sov- kaw cov qauv rau lub hauv paus ntawm lub hnab, tso cai rau lub pob hloov tau "sawv" thaum sau; qhov no tau cim qhov tshwm sim ntawm qhov sawv ntxov ntxov-puav.
Thaum lub sijhawm xyoo 1980 thiab 1990s, sawv- lub hnab ntim tshuab matured. Kev siv ntau- txheej cov ntaub ntawv sib xyaw- xws li PET, PE, thiab txhuas ntawv ci- tau txhim kho qhov ntim cov khoom thaiv kev tiv thaiv, tiv thaiv dej noo, thiab lub zog. Raws li qhov tshwm sim, lub hauv paus qauv tau hloov zuj zus los ntawm qhov yooj yim folds mus rau qhov ruaj khov "W- zoo li" lossis "K- zoo li" cov ntsaws ruaj ruaj, ua rau cov hnab ntim tau ruaj khov dua tom qab sau thiab ua rau lawv muaj kev saws me nyuam thoob plaws hauv cov zaub mov, dej haus, thiab kev saib xyuas tus kheej.
Los ntawm lub xyoo pua 21st, sawv ntsug-pouches tau nkag mus rau theem ntawm kev loj hlob sai, nrog rau lawv cov xwm txheej thov nthuav dav heev. Tshaj li kev siv ib txwm siv xws li khoom noj txom ncauj, kua txiv hmab txiv ntoo, thiab khoom noj khoom haus, lawv tau txuas ntxiv mus rau hauv cov khoom xws li khoom noj tsiaj, ntxhua khaub ncaws, thiab tshuaj pleev ib ce. Cov tuam txhab lag luam tau pib ua qhov tseem ceeb ntawm cov qauv tsim uas muaj "lub teeb yuag, qhib tau yooj yim, thiab rov ua dua"- suav nrog cov yam ntxwv xws li zipper kaw, spouts, thiab leaks- cov ntaub ntawv pov thawj los muab cov neeg siv kev paub piv nrog cov khoom ntim khoom.
Nyob rau hauv xyoo tas los no, txoj kev loj hlob ntawm kev sawv ntsug- cov hnab ntim tau nce ntxiv rau kev ruaj ntseg ib puag ncig thiab txhim kho kev ua haujlwm. Ntawm ib sab, kev lag luam tau txo nws cov kev taw qhia ib puag ncig los ntawm kev txo qis kev siv cov yas thiab txhawb nqa cov khoom siv rov ua dua tshiab mono- cov khoom siv. Ntawm qhov tod tes, kev tsim kho tshiab-xws li kev siv cov yeeb yaj kiab siab - thaiv cov yeeb yaj kiab, puncture- cov ntaub ntawv tiv taus, thiab cov txheej txheem luam ntawv sophisticated - xyuas kom meej tias lub ntim tsis tsuas yog ua tau raws li cov khoom lag luam tshiab thiab kev thauj mus los, tab sis kuj muaj cov khoom lag luam zoo tshaj plaws.