CPP zaj duab xis hom, daim ntawv thov thiab cov txheej txheem ntau lawm

Cov hom zaj duab xis CPP

Zaj duab xis CPP yog ib qho zaj duab xis polypropylene (PP) tsim los ntawm kev ua yeeb yam kev rho tawm txheej txheem.

Hom zaj duab xis no txawv ntawm BOPP (bidirectional polypropylene). Nws yog ib zaj duab xis tsis-taw qhia. Nws muaj cov yam ntxwv ntawm kev pob tshab zoo, ci ntsa iab, zoo nruj, tiv taus dej noo zoo, tiv taus kub zoo, thiab yooj yim kaw thaum tshav kub. Tom qab luam ntawv, lamination, ua lub hnab, siv dav hauv kev ntim khoom noj, tshuaj, ntawv hauv tsev, khaub ncaws, khoom siv niaj hnub, kev lag luam, thiab lwm yam.

Cov yeeb yaj kiab CPP muaj cov yam ntxwv ntawm kev pom tseeb zoo, ci ntsa iab, zoo nruj, tiv taus dej noo zoo, tiv taus kub zoo, thiab yooj yim kaw thaum kub. Raws li kev siv sib txawv, nws tuaj yeem muab faib ua cov yeeb yaj kiab CPP dav dav, cov yeeb yaj kiab CPP aluminized thiab cov yeeb yaj kiab ua noj ua haus CPP. Cov yeeb yaj kiab, thiab lwm yam. Tom qab luam ntawv thiab ua lub hnab, cov yeeb yaj kiab CPP tau siv dav hauv cov khaub ncaws, cov hnab ntim paj, cov yeeb yaj kiab ntawv thiab cov duab album, cov khoom noj khoom haus ntim thiab cov yeeb yaj kiab hlau uas tsim nyog rau kev ntim khoom thaiv thiab kho kom zoo nkauj.

Tsis tas li ntawd xwb, qhov kev thov rau cov khoom ntim khoom noj, cov khoom ntim khoom qab zib (zaj duab xis ntswj), cov khoom ntim tshuaj (hnab tshuaj infusion), daim kab xev nplaum tus kheej, cov neeg tuav daim npav lag luam, cov ntaub ntawv tais ceev tseg, thiab lwm yam kuj nce ntxiv.

CPP muaj kev tiv taus kub zoo heev. Vim tias qhov chaw mos ntawm PP yog kwv yees li 140 ° C, hom zaj duab xis no tuaj yeem siv rau hauv kev sau kub, hnab rov qab, ntim khoom aseptic thiab lwm yam teb. Ua ke nrog nws cov kua qaub, alkali thiab roj zoo heev, nws tau dhau los ua cov khoom xaiv thawj zaug rau kev ntim khoom noj lossis cov ntaub ntawv laminate. Nws muaj kev nyab xeeb thaum kov cov khoom noj, muaj kev ua tau zoo heev, thiab yuav tsis cuam tshuam rau qhov saj ntawm cov khoom noj sab hauv. Ntau qib ntawm cov resin tuaj yeem xaiv kom tau txais cov yam ntxwv xav tau.

Cov txheej txheem tsim cov yeeb yaj kiab CPP

Zaj duab xis CPP yog ib zaj duab xis polypropylene uas tsis tau ncab ua los ntawm txoj kev casting. Tam sim no, hauv Suav teb, zaj duab xis CPP tau ua tiav zoo heev tom qab ntau xyoo ntawm kev sib sau ua ke. Piv nrog rau cov teb chaws tsim kho, zaj duab xis CPP hauv tsev tau mus txog qib siab thoob ntiaj teb hauv kev siv tshuab thiab cov khoom siv tsim khoom.

Cov txheej txheem tsim cov yeeb yaj kiab feem ntau siv txoj kev T-die. Cov yam ntxwv ntawm txoj kev no yog:

(1) Txoj kev siv daim kab xev casting tshem tawm theem tshuab zaj duab xis ntawm txoj kev raj zaj duab xis, yooj yim rau kev khiav lag luam, thiab muaj pov tseg tsawg dua;
(2) Thaum tsim los ntawm txoj kev siv daim kab xev casting, cov tshuaj molecules tau teeb tsa kom zoo, yog li nws muaj txiaj ntsig zoo rau kev txhim kho qhov pob tshab, ci thiab tuab sib xws ntawm zaj duab xis, thiab tsim nyog rau kev ntim khoom siab;
(3) Lub casting ib feem siv lub zog hluav taws xob nce thiab nqis thiab cov qauv txav mus tom ntej thiab rov qab, uas yooj yim rau kev khiav lag luam;
(4) Lub corona ib feem siv cua txias thiab dej txias, yog li cov khoom tsis yooj yim rau deform;

Cov ntsiab lus tseem ceeb ntawm cov txheej txheem tsim cov yeeb yaj kiab CPP

Lub taub hau tshuab T-hom yog ib qho ntawm cov khoom siv tseem ceeb. Kev tsim lub taub hau tshuab yuav tsum ua kom cov khoom ntws tawm sib npaug thoob plaws ntawm lub qhov ncauj tshuab. Yuav tsum tsis muaj qhov chaw tuag hauv cov dej ntws sab hauv ntawm lub taub hau tshuab, thiab cov pwm khoom yuav tsum muaj qhov kub sib npaug. Yuav tsum xav txog qhov rheology ntawm cov khoom siv. Muaj ntau yam xws li tus cwj pwm. Yuav kom siv lub taub hau tshuab precision machining, lub taub hau tshuab tapering manifold hanger hom tapering feem ntau siv. Qhov chaw ntawm lub tshuab txias yuav tsum tau ua tiav zoo, qhov roughness ntawm qhov chaw yuav tsum tsis pub ntau tshaj 0.15 hli, qhov ceev tig yuav tsum ruaj khov, thiab qhov kev ua tau zoo ntawm kev sib npaug dynamic yuav tsum zoo kom tsis txhob muaj kev hloov pauv ntawm qhov tuab ntev. Siv beta ray lossis infrared thickness gauge los saib xyuas qhov tuab ntawm zaj duab xis kom ua tiav qhov tuab txaus siab. Yuav kom tsim cov zaj duab xis cam khwb cia tsim nyog, nws tsis yog tsuas yog tsim nyog los kho cov txheej txheem ntawm cov khoom siv raw, tab sis kuj yuav tsum tswj hwm cov xwm txheej ua tiav.

Qhov cuam tshuam loj tshaj plaws rau kev ua haujlwm ntawm zaj duab xis yog qhov kub. Thaum qhov kub ntawm cov resin nce ntxiv, lub zog tensile ntawm zaj duab xis ntev (MD) nce ntxiv, qhov pob tshab nce ntxiv, thiab qhov tsaus ntuj maj mam txo qis, tab sis lub zog tensile transverse (TD) ntawm zaj duab xis txo qis. Qhov kub tsim nyog dua yog 230 ~ 250 ℃. Riam cua ntawm lub tshuab cua txias tsim ib txheej huab cua nyias nyias ntawm qhov chaw ntawm zaj duab xis thiab lub tshuab cua txias, uas ua rau zaj duab xis txias sib npaug thiab tswj kev tsim khoom ceev ceev. Kev kho ntawm riam cua yuav tsum tsim nyog. Qhov ntim cua ntau dhau lossis lub kaum sab xis tsis raug yuav ua rau qhov tuab ntawm zaj duab xis tsis ruaj khov lossis tsis lo rau lub tshuab, ua rau muaj qhov ntxhib lossis cov qauv uas cuam tshuam rau qhov zoo ntawm qhov tsos. Thaum qhov kub ntawm lub tshuab cua txias nce ntxiv, qhov tawv ntawm zaj duab xis nce ntxiv thiab qhov tsaus ntuj nce ntxiv.

Yog tias cov khoom ntxiv hauv cov khoom siv raw poob rau ntawm qhov chaw ntawm lub tshuab txias, lub tshuab yuav tsum kaw thiab ntxuav kom tsis txhob cuam tshuam rau qhov zoo ntawm zaj duab xis. Zaj duab xis cam khwb cia yog mos heev, thiab qhov siab thiab qhov nruj yuav tsum tau kho raws li cov yam xws li qhov tuab ntawm zaj duab xis thiab qhov ceev ntawm kev tsim khoom thaum lub sijhawm winding. Txwv tsis pub, ripples yuav tshwm sim thiab cuam tshuam rau qhov tiaj tus. Kev xaiv qhov nruj yuav tsum tau txiav txim siab raws li lub zog tensile ntawm cov khoom. Feem ntau, qhov nruj ntawm winding ntau dua, qhov tsawg dua qhov yuav ua rau lub reel so thiab deflect. Txawm li cas los xij, ripples yuav yooj yim tshwm sim thaum pib ntawm winding, uas yuav cuam tshuam rau qhov du ntawm yob. Ntawm qhov tsis sib xws, yog tias qhov nruj ntawm winding me me, qhov pib zoo, tab sis qhov ntau koj dov, qhov ntau dua rau zaj duab xis so thiab deviation. Yog li ntawd, qhov nruj yuav tsum nruab nrab thiab tswj kom ruaj khov.

Kev tshuaj xyuas cov qauv zaj duab xis CPP thiab kev siv cov khoom siv raw

Tus qauv ntawm CPP zaj duab xis zoo ib yam li ntau lwm hom zaj duab xis ntim khoom. Tam sim no, cov khoom tsim hauv tsev yog peb txheej txheej co-extruded cast film. Cov qauv peb txheej yog: txheej txheej sealing kub, txheej txhawb nqa, thiab txheej corona. Tau kawg, cov khoom siv raw uas xav tau hauv cov txheej txheem tsim cov zaj duab xis retort, zaj duab xis aluminized, thiab zaj duab xis sib xyaw ua ke yeej txawv. Tsab xov xwm no Tus editor ua ib qho kev luv luv thiab kev tshuaj xyuas yooj yim:

Cov khoom siv raw khoom tseem ceeb ntawm CPP yog PP, tab sis cov khoom siv raw siv rau hauv cov yeeb yaj kiab sib txawv yog txawv. PP homopolymer, binary copolymer, thiab ternary copolymer siv ua ke hauv kev tsim cov yeeb yaj kiab thiab koom tes ua ke. Vim tias cov txheej txheem kaw cua sov yuav tsum tau kaw cua sov, cov khoom siv yuav tsum muaj qhov melting point qis dua, zoo dua qhov kub yaj, qhov kub sealing dav dua, thiab yooj yim dua sealing; cov txheej txhawb nqa ua lub luag haujlwm txhawb nqa hauv cov yeeb yaj kiab, ua rau cov yeeb yaj kiab tawv dua thaum txo tus nqi; cov txheej corona yuav tsum tau luam tawm lossis metallized, uas xav tau qhov nruab nrab ntawm qhov nro. Yuav tsum muaj kev txwv nruj rau kev ntxiv cov khoom ntxiv rau hauv cov resin, xws li cov txheej corona ntawm cov khoom siv aluminium-plated, vim tias qhov chaw ntawm cov khoom yuav tsum rhiab rau cov hlau xws li Aluminium yuav tsum muaj lub zog nplaum zoo heev thiab tseem tswj tau qhov ruaj khov zoo thiab rigidity tom qab evaporation. Yog li ntawd, cov khoom siv corona aluminized tshwj xeeb yuav tsum tau siv rau kev tsim khoom.