PET Lamination Tshiab: Pab tso cov kev ua haujlwm nyob ntev dua

Yam li cas PET Thermal Lamination Film yuav tsum muaj kev nyab xeeb thiab txhawb kom cov lus qhia ntawm kev nyab xeeb tau zoo dua

Cov kev nyab xeeb rau hluav taws, oxygen, thiab UV hauv cov PET laminate uas muaj kev ua haujlwm siab

Cov phab ntsuas thermal lamination PET uas muaj qhov tswj hwm siab yuav pab tshem tawm lub sijhawm nyob ntawm cov khoom los ntawm kev pab tshem tawm rau hauv qhov chaw ntawm cov molecules. Qhov uas pab tau cov phab no yog qhov kev ua haujlwm ntawm cov crystalline structure uas txog rau qhov kev txhawb nqa ntawm cov hlau thiab cov khoom uas tuaj yeem rov qab mus rau hauv. Cov cim txhawb nqa oxygen (OTR) yuav tshwm sim ntawm 0.5 rau 1.5 cc per square meter per day, qhov no yog qhov txaus siab rau cov khoom zoo li cov lus qhia rau kev kho mob thiab cov khoom noj uas tsis tuaj yeem tshwm sim rau oxygen. Rau qhov kev tswj hwm cov dej, cov lus qhia tshiab yuav pab tshem tawm cov cim txhawb nqa moisture vapor (MVTR) rau hauv 0.8 grams per square meter per day, tab sis yuav tshwm sim rau hauv qhov xwm txheej tshaaj tshaaj uas muaj 40 degrees Celsius thiab 90% humidity. Qhov no pab tshem tawm qhov tshwm sim ntawm cov khoom tshaaj tshaaj los ntawm cov dej. Cov khoom uas tsis tuaj yeem tshwm sim rau UV light, li cas cov lus qhia tshiab thiab cov khoom noj uas muaj kev ua haujlwm, yuav tshwm sim rau cov lus qhia tshiab uas pab tshem tawm cov UVA thiab UVB rau hauv 380 nanometers, pab tshem tawm cov nutrients rau lub sijhawm. Txhua yam ntawm cov phab tshem tawm no yuav ua haujlwm rau hauv qhov kev sib npaug. Cov oxygen scavengers yuav pab tshem tawm cov hlau uas PET tau ua lawm rau cov hlau, thiab cov silica coatings yuav pab tshem tawm cov dej tsis tau ua rau cov khoom tshem tawm muaj qhov tsis zoo li cov phab tshaaj tshaaj thiab tsis zoo li cov phab tshaaj tshaaj.

Tshuaj xyuam kev tswj hluas ntawm lub sijhawm ntev: Tshuaj xyuam kev nyuaj dua (ASTM F1980, ISO 11607)

Thaum peb xav paub seb cov khoom siv yuav tshwm sim li cas thaum lub neej ntawm nws, kev kawm txog kev nyuaj siab ntau dua yog qhov kev kawm uas muab cov kev nyuaj siab thiab kev puas tsuaj rau ntau xyoo los mus rau hauv qhov sib tw ntau xyoo. Txoj kev kawm ASTM F1980 qhia tias PET laminates yuav tsum tau kawm hauv qhov ceev ntau dua 60 degrees Celsius txhua hnub, thiab muaj kev saib xyuas ntau dua rau cov seal thiab cov ntaub ntawv tshem tawm hauv qhov kawm no. Cov khoom siv uas muaj qhov zoo dua yuav tshwm sim zoo li 95% ntawm qhov tshem tawm ntawm nws thaum nws tau kawm hauv qhov kawm uas muab cov kev nyuaj siab thiab kev puas tsuaj rau peb xyoo. Qhov no yog qhov zoo heev thaum peb so nrog cov laminates tshwj xeeb uas tsuas muaj 70%. Rau kev kawm txog kev tshem tawm hauv ISO 11607, kev kawm gamma irradiation yuav tshwm sim rau 50 kGy. Cov PET films uas tau muab muab kev tshem tawm hauv qhov pob zeb yuav tshwm sim zoo li tsis muaj qhov tshem tawm, tab sis cov khoom siv uas tsis tau muab kev tshem tawm yuav tshwm sim 12% ntawm kev tshem tawm. Txhua yam kev kawm uas tau tshwm sim no yuav pab peb paub txog qhov sib tw ntawm kev tshem tawm uas yuav tshwm sim rau plus lossis minus 5% ntawm qhov tseeb. Qhov tseeb no yog qhov txaus rau kev tshwm sim rau kev tswj hwm thiab kev tshem tawm qhov sib tw ntawm kev tshem tawm, tshwj xeeb rau cov kev tswj hwm uas kev tshwm sim ntawm khoom siv yuav tshwm sim rau kev tshem tawm thiab kev tshem tawm.

Cov txhais ntawm kev lag luam hauv qab cov kev lag luam tseem ceeb

Kev kho cov ntaub ntawv rau cov khoom noj: kev lag luam ntawm cov ntaub ntawv rau hauv qab kev kho kom tsis muaj dej thiab kev cuam tshuam los ntawm dej

Thaum kawm ua kom tsis muaj tshuaj ntsuab thaum muaj txoj kev ua kom tsis muaj tshuaj ntsuab hauv qhov chaw uas muaj qhov siab ntawm 121 degrees Celsius thiab muaj qhov siab ntawm cov dej, nws yuav pab ua rau cov khoom siv los ua lub cib yuav ploj dua. Cov dej yuav pab ua rau cov lus sib sau ntawm PET plastics ploj, thiab ua rau cov lus sib sau ntawm cov khoom ploj los ntawm 30 rau 40 percent tom qab muaj ½ xyoo hauv qhov kawm. Qhov uas yuav dhau mus tom ntej yog qhov txaus siab rau kev nyab xeeb ntawm cov khoom noj. Cov khoom uas ploj tsis tuaj yeem saum cov oxygen raws li yuav tsum tau. Tsis tas li, tias cov dej yuav ploj mus rau hauv, tsuas yog 0.1 percent, yuav pab ua rau cov khoom noj ploj lossis muaj lub cev tsis zoo rau cov soup uas muaj dej lossis cov khoom noj uas tau ua lawm thiab muaj nyob ntev. Txawm li cas los xij, muaj qhov kev daws teeb meem uas muaj nyob hauv hnub no. Cov duab ntawm PET thermal lamination uas muaj kev nyab xeeb yuav pab tshuav cov teeb meem no los ntawm cov duab ntawm cov lus sib sau uas muaj kev nyab xeeb thiab yuav pab tshuav kev ploj ntawm cov dej. Cov duab no kuj muaj kev nyab xeeb, yog li nws yuav pab ua rau cov khoom noj tsis ploj lossis tsis muaj kev nyab xeeb thaum ua cov kev ua haujlwm ntau yam.

Kaub Khaub Rau Tshuaj: Gamma Irradiation thiab Kev Thim Qhov Tshuaj

Thaum gamma irradiation txhob rau polymers nyob rau hauv qhov ntau ntawm 25 thiab 50 kGy, nws tsim cov free radicals uas pib tshem tawm cov khoom. Cov radicals no ua rau oxidation rau hauv polymer matrices uas pab cuam nrog cov teeb meem li cov chain scission, cov kab laug ntawm qhov chaw pov tseg yog qhov tsoo, thiab lossis qhov tshaj plaws ntawm peel strength uas yuav tsum yog ntau dua 30% raws li ASTM F88 standards. Yog li cas es yog qhov txaus siab heev? Qhov tshem tawm no puas muaj kev cuam tshuam rau hauv sterile barrier systems, vim tias yuav tsum muaj qhov tshaj plaws leej twg rau hauv medical implant packaging yuav pab cuam nrog qhov tshaj plaws ntau dua. Peb yog qhov tshaj plaws ntawm cov nqi uas yog ntau dua $740,000 rau ib qhov tshaj plaws raws li Ponemon Institute tau piav qhia los ntawm 2023. Txawm li cas los xij, cov PET laminates tshiab dua lawm tau muaj cov additives tshiab uas tau tsim los txhawb cov free radicals nyob rau hauv qhov chaw uas lawv tau tsim. Qhov no pab cuam nrog kev tswj cov seal integrity thiab pab cuam nrog kev tswj cov dimensions kom zoo ib yam rau lub sijhawm ntawm cov khoom, uas yog qhov tseem ceeb rau cov thawj tswj khiav khoom thaum lawv txhawb cov khoom tshiab uas muaj kev cuam tshuam rau cov medical applications.

Tshuaj ntxiv kev nyab xeeb: Tshuaj tshuaj rau qhov chaw thiab kev tswj hwm qhov chaw sib sau rau PET lamination

Plasma thiab Corona tshuaj tshuaj ua ntej kom muaj kev nyab xeeb ntawm kev nyab thiab tiv thaiv kev haum

Kev txuas ntxiv rau lub tshuab PET los ntawm kev siv plasma thiab corona yog ua haujlwm raws li kev txuas ntxiv chemically thiab physically kom cov lamination zoo dua rau hauv qhov chaw uas lawv sib txuas. Cov kev txuas no yuav pab paug qhov surface energy los ntawm kev tswj xyuam kev txuas oxidation rau hauv qhov tshuab. Qhov twg yuav dhau? Cov carbonyl thiab hydroxyl groups uas muaj kev sib txuas yuav tau ua, thiab tom qab ntawd lawv yuav sib txuas covalently nrog adhesive uas tau siv rau hauv qhov kev txuas lamination. Ntawd tseem muaj kev nyuaj dua rau lub tshuab ntawm qhov chaw uas pab ua kev txuas mechanical zoo dua rau hauv qhov tshuab. Thaum cov qhov no sib txuas tag, peb tau txais lub tshuab PET thermal lamination uas zoo dua. Cov lus test tau hais tias peel resistance yuav pab dua li 50% thaum tau siv rau hauv qhov kev nyuaj dua rau lub tshuab. Thiab no yog qhov tseem ceeb: qhov yuav pab no tsis muaj kev nyuaj rau hauv qhov chaw uas dej yuav tuaj ncig, lossis muaj kev puas tsuaj los ntawm kev txuas thiab kev sov tag nrho.

Cov qhov tseem ceeb uas yuav tsum xyuam xyuas thaum ua haujlwm yog qhov ntau ntawm kev txhawb nqa (discharge power) uas muaj ntau ntawm 1 rau 5 kW per square meter, sijhawm uas muaj ntau ntawm 0.1 rau 5 seconds, thiab cov ntawv uas siv los yog air, oxygen, lossis nitrogen. Txhua qhov no yog qhov cuam tshuam rau qhov ntau ntawm cov functional groups uas muaj nyob hauv qhov ntsiab thiab qhov deep ntawm kev txhawb nqa uas muaj nyob hauv cov khoom. Yog tias koj xaiv cov kev xaiv no raws li xav tau, ces tus nqi yuav zoo ib yam rau txhua qhov ntawm cov ntawv. Qhov kev pab tswv yim no yuav pab rau cov khoom tsis tuaj yeem tshem tawm rau lub sijhawm tsawg dua li 5 xyoo thiab tsis muaj ntau nqi ntxiv rau kev ua haujlwm. Lub tsev ua khoom siv ntau yuav pom qhov kev sib npaug ntawm kev ua haujlwm thiab nqi no yog qhov tseem ceeb heev thaum ua kom loj.

Tshem tawm cov kev xaiv ntawm lamination process rau kev nyuaj siab

Kuam ntxawv ntawm qhov ceev, qhov ntau, thiab qhov kev tswj hwm ntawm lub rooj yog qhov tseem ceeb rau qhov kev txhim kho cov ntaub ntawv PET thermal lamination uas yuav tsum nyob tau ntev li lawv yuav tsum nyob. Yog li cas qhov ceev txog 150 degrees Celsius, qhov adhesive yuav ploj los. Thiab yog li cas qhov ntau ntawm lub rooj (nip pressure) tawg mus rau hauv 40 pounds per square inch, ces muaj qhov noog nyob rau hauv qhov kev ploj los ntawm qhov ceev lossis qhov dej. Lub tshav coob tuaj yeem pom qhov zoo rau hauv qhov ceev ntawm 120 los yog 150 degrees Celsius thiab qhov ntau ntawm 40 los yog 60 psi. Qhov rooj no yuav ua rau cov ntaub ntawv muaj kev sib sau zoo thiab tsis ploj cov ntaub ntawv thib ob. Yog li cas tswj hwm lub rooj ntau heev, piv txwv li 150 meters per minute, ces yuav ua rau qhov coating tsis zoo thiab yuav ua rau muaj qhov tsis zoo nyob rau hauv cov ntaub ntawv nyob rau hauv qhov ceev. Qhov test uas ua raws li ASTM F1980 standards qhia tias yog li cas qhov kev tswj hwm no tau muab tso rau qhov zoo, ces qhov oxygen transmission rates yuav nyob hauv 1.5 cubic centimeters per square meter per day, tsaug rau ob xyoo. Qhov no tau txais qhov kev tswj hwm tseem ceeb uas tseem ceeb rau cov khoom uas muaj kev nyob tau ntev, piv txwv li cov khoom siv rau hauv kev kho mob thiab cov khoom siv rau hauv kev soj ntsuam. Tsim qhov xav txog qhov adhesive nyob rau hauv qhov kev tswj hwm thiab tshem tso qhov kev tswj hwm ntawm cov rooj tau muab tso rau qhov zoo yuav pab paub qhov tsis zoo kawg nkaus ua rau muaj qhov tsis zoo ntau dua.

FAQ

Yus yog PET thermal lamination films?

PET thermal lamination films yog cov film tsaus ntawv uas siv los txhawb kev nyab xeeb thiab lub caij nyab xeeb ntawm cov khoom los ntawm kev pab tshuaj kom muaj kev kub, kev ntxiv, thiab kev kub ntawm UV.

PET films yuav ua li cas los txhawb lub caij nyab xeeb ntawm cov khoom?

Lawv muaj cov qhov chaw crystalline uas txog kev sib txuas ntawm qhov kub thiab cov qhov chaw sib txuas ntau yam uas pab tshuaj kom tsis muaj kev kub, kev ntxiv, thiab kev kub ntawm UV, kom cov khoom yuav nyab xeeb dua.

Cov yav tswv hauv qhov twg yuav tau txais kev pab los ntawm PET laminates nyab xeeb?

Cov yav tswv zoo li cov yav tswv siv cov khoom siv rau qhov tso cua, cov yav tswv siv cov khoom siv rau kev tshuaj, thiab cov yav tswv siv cov khoom siv rau kev tshuaj nyob rau hauv qhov tso cua yuav tau txais kev pab los ntawm PET laminates vim lawv muaj kev pab tshuaj kom tsis muaj kev kub, kev ntxiv, thiab kev kub ntawm UV.