Polypropylene (PP) films tau dhau los ua ib qho ntawm cov ntaub ntawv tseem ceeb hauv kev ntim khoom noj vim nws cov khoom siv zoo heev, tshuaj lom neeg ruaj khov thiab ua haujlwm kub. Lawv tsis yog - lom, tsis muaj ntxhiab, siab - kub- tiv taus, thiab roj- cov yam ntxwv tiv taus ua rau nws siv dav hauv cov hnab yas, cov hnab ntim khoom noj, lub raj mis sealing, thiab lwm yam.. Txawm li cas los xij, nrog rau kev tswj hwm kev nyab xeeb ntawm zaub mov, polypropylene zaj duab xis cov qauv kev nyab xeeb thiab cov ntawv pov thawj yuav ntsib teeb meem ntau dua. Nyob rau hauv daim ntawv no, qhov yuav tsum tau muaj kev ruaj ntseg ntawm polypropylene zaj duab xis nyob rau hauv ntim zaub mov yuav raug soj ntsuam los ntawm cov yam ntxwv ntawm cov khoom, domestic thiab txawv teb chaws tus txheej txheem, cov khoom tseem ceeb xeem thiab cov txheej txheem ntawv pov thawj.
Physico- Cov Khoom Siv Tshuaj ntawm Polypropylene Films thiab Lawv Qhov Zoo Tshaj Plaws hauv Kev Sib cuag Khoom Noj
Polypropylene yog ib qho thermoplastic polymer synthesized los ntawm propylene monomers. Molecular stability, siab crystallinity Ntau dua los yog sib npaug rau 90%, thiab homopolymer PP copolymer PP 60-80% muab cov txiaj ntsig kev ua tau zoo:
- Thaum tshav kub kub tsis kam: 160-170℃melting point, kub tsis kam siab tshaj 120 degree, haum rau microwave cua sov thiab retort hnab.
- Chemical stability: Muaj cov kua qaub zoo, alkali, roj thiab feem ntau cov organic solvents kuj, txo cov tshuaj tiv thaiv nrog cov khoom xyaw.
- Mechanical kev ua tau zoo: siab zog, cuam tshuam tsis kam, puncture kuj, yog qhov kev xaiv zoo tshaj plaws rau cov kab ntim tsis siv neeg.
- Transparency thiab barrier yam ntxwv: los ntawm co-extrusion technology, qhov sib npaug tuaj yeem raug ntaus ntawm qhov pom tseeb siab thiab cov khoom siv oxygen / dej vapor barrier, ua rau lub neej txee ntawm cov khoom noj.
Cov khoom no ua rau cov yeeb yaj kiab polypropylene zoo tagnrho rau kev ntim khoom noj, tab sis lawv txoj kev nyab xeeb yuav tsum tau ua kom ntseeg tau los ntawm cov qauv nruj thiab cov ntawv pov thawj.
National thiab International Standard Systems rau khoom noj khoom haus sib cuag
(I) Tuam Tshoj Standard System
Tuam Tshoj feem ntau tswj kev nyab xeeb ntawm cov khoom noj khoom haus sib cuag los ntawm National Food Safety Standards. Cov qauv tseem ceeb rau cov yeeb yaj kiab polypropylene suav nrog:
1.GB4806.7-2023 Cov zaub mov raug rau cov yas:
- Yuav tsum tau polypropylene resins thiab additives kom ua raws li daim ntawv tso cai nyob rau hauv Appendix A thiab GB9685-2016.
- Tag nrho cov kev thauj mus los tau raug txwv kom tsawg dua lossis sib npaug li 10 mg / dm2 thiab cov tshuaj tsiv teb tsaws tshwj xeeb (xws li thawj cov tshuaj tsw qab amines) raug txwv hnyav heev.
- Kev txwv cov ntsiab lus hlau (chromium, vanadium, zirconium, hafnium) txog 0.01 mg / kg.
2.GB 31604.1-2023 Cov Kev Cai dav dav rau cov khoom sib cuag zaub mov thiab tsab xov xwm Migration Testing:
- Txhais cov kev xaiv thiab kev kuaj mob (kub, sijhawm) rau simulation media (xws li dej, 3% acetic acid, 10% ethanol, fatty food simulants).
- Kev soj ntsuam raws cai yuav tsum tau ua raws li cov zaub mov raug (piv txwv li, luv- kev sib cuag, ntev- lub sij hawm cia, kub kub).
3.GB/T 10004-2023 Ntim-Plastic Composite Films thiab Plastic Bags-Dry Layering thiab Extrusion Layering:
- Qhia txog lub cev thiab cov khoom siv ntawm cov yeeb yaj kiab polypropylene (piv txwv li, tensile lub zog tawg elongation, lub zog sealing).
Txwv cov kuab tshuaj residues tsawg dua los yog sib npaug li 5 mg/m2 kom ntseeg tau tias tsis muaj cov khoom txaus ntshai nyob hauv lub sijhawm tsim khoom.
(II) International Standard Systems
1.EU Regulation (EU EC) No. 10/2011:
- Txwv tag nrho kev thauj mus los tsawg dua lossis sib npaug rau Tsawg dua lossis sib npaug li 10 mg / dm2 thiab teem caij tshwj xeeb tsiv teb tsaws txwv (SML) rau monomers thiab additives.
- Kev ntsuas qhov hnov qab (kev ntsuas tsw thiab saj hloov pauv) thiab cov khoom siv - kev txwv tshwj xeeb (xws li txwv tsis pub siv cov khoom siv rov ua dua uas muaj bisphenol A) yuav tsum tau ua.
2.US FDA 21 CFR Tshooj 177.1520:
- Polypropylene tau muab faib ua homopolymers (Type I) thiab copolymer (Type II) thiab ntxiv subdivided rau hauv tshav kub tsis kam (piv txwv li, pawg C thaum kub tshaj 120 degree).
- chemical extractable testing (piv txwv li n-hexane reflux extraction tom qab 6 teev nrog huab hwm coj piv Tsawg dua lossis sib npaug li 0.5%) yuav tsum tau ua kom ntseeg tau tias cov khoom tsis zoo tsis raug thauj.
3.German LFGB (Lebensmittel-und Futtermittelgesetzbuch):
Ntxiv cov tshuaj tiv thaiv kab mob antioxidant hauv EU lub moj khaum (xws li SML ntawm Irganox 1010=6 mg/kg).
Kev ntsuam xyuas qhov xav tau yuav tsum tau ua kom paub tseeb tias tsis muaj ntxhiab tsw lossis saj hloov pauv hauv cov dej thiab cov roj txiv roj rho tawm.
Cov Kev Ntsuas Cov Ntsiab Cai thiab Cov Kev Xav Tau
(I) Migration Testing
Kev kuaj kev tsiv teb tsaws chaw yog qhov tseem ceeb rau kev ntsuas kev nyab xeeb ntawm polypropylene daim nyias nyias, suav nrog:
Zuag qhia tag nrho migration OML:
Simulate tiag -lub ntiaj teb no tej yam kev mob ntawm kev siv (xws li, 40℃/ 10 hnub, 100℃/ 2 teev) los ntsuam xyuas tag nrho cov soluble teeb meem nyob rau hauv cov ntaub ntawv.
Kev xeem xov xwm yuav tsum raug xaiv raws li hom zaub mov ((piv txwv li, 3% acetic acid rau cov khoom noj acidic, roj txiv roj lossis isoctane rau cov khoom noj rog).
Tshwj xeeb Migration Limits:
Kev ntsuam xyuas tus kheej yog ua rau xav tias muaj teeb meem tshuaj xws li antioxidants BHT thiab lubricant calcium stearate.
Piv txwv li, EU txwv tsis pub BHT tsiv teb tsaws chaw tsawg dua lossis sib npaug li 3 mg / kg, thaum US txwv BHT tsiv teb tsaws. FDA txwv cov calcium stearate ntau nyob rau hauv cov khoom noj khoom haus cov khaubncaws sab nraud povtseg Tsawg dua los yog sib npaug li tsawg dua los yog sib npaug li 1%.
High -Tsub Decomposition Product Testing:
Microwave cua sov los yog ua kom tsis muaj menyuam tuaj yeem ua kom muaj kev hloov pauv ntxiv lossis tsim cov khoom tawg tshiab.
Cov kab seem seem raug kuaj pom los ntawm cov cuab yeej siv siab siab xws li roj chromatography-mass spectrometry thiab kua chromatography-mass spectrometry.
(II) Mechanical Performance Testing
Tensile Strength thiab pob txha elongation:
Xyuas kom meej tias cov yeeb yaj kiab tseem nyob ruaj khov thaum thauj thiab khaws cia kom tsis txhob muaj cov khoom noj.
Piv txwv li, GB / T10004-2023 yuav tsum muaj lub zog tensile ntev Ntau dua lossis sib npaug li 20 MPa rau cov yeeb yaj kiab PP.
Thaum tshav kub kub Seal Strength:
Kuaj lub tev lub zog ntawm pob sealing kom tiv thaiv kom tsis txhob muaj dej vim tsis zoo cua sov sealing.
Thaum tshav kub kub foob lub zog Ntau dua los yog sib npaug rau 8 N / 15mm yog ib txwm xav tau.
(III) Kev Ntsuas Kev Ntsuas
Kev ntsuas excerpt:
Soak zaj duab xis nyob rau hauv 3% acetic acid los yog txiv roj roj thiab ntsuam xyuas cov xim thiab tsw hloov ntawm cov extract.
Kev cob qhia ntau dua lossis sib npaug li 5 tus neeg soj ntsuam tau ua qhov kev ntsuam xyuas qhov muag tsis pom kev kom tsis txhob muaj ntxhiab tsw los yog cov av nkos.
Instrumental Analysis:
Turbidity meters (qhov tseeb 0.01 NTU) thiab UV-Vis spectrophotometers (wavelength range 200-800 nm) quantized results.
INTRODUCTION Certification Process thiab Compliance Strategies
(I) Tuam Tshoj tus txheej txheem ntawv pov thawj
Khoom siv raws li:
Xyuas kom PP resins thiab additives ua raws li daim ntawv tso cai nyob rau hauv Appendix A. rau GB4806.7-2023.
Piv txwv li, kev siv tshuaj antioxidant BHT yuav tsum tsawg dua lossis sib npaug li 0.5% thiab cov roj nplua nyeem calcium stearate Tsawg dua lossis sib npaug li 1%.
Hom kev xeem:
Commissioning CNAS/CMA certified laboratories for comprehensiveproject testing (migration, mechanical performance, sensory assessment).
Daim ntawv tshaj tawm yuav tsum muaj cov xwm txheej, cov txheej txheem thiab cov ntaub ntawv ntxaws.
Daim ntawv thov rau daim ntawv tso cai tsim khoom:
Kev xa daim ntawv thov rau Daim Ntawv Tso Cai Ua Khoom Noj Khoom Noj Khoom Noj, suav nrog kev tshuaj xyuas cov txheej txheem kev khiav dej num, mus rau lub xeev cov tswj hwm kev lag luam.
Tom qab ntawm - qhov chaw kuaj mob, tau txais daim ntawv pov thawj SC.
(II) International Certification Strategies
EU CE Certification:
Ua kom tiav qhov kev xeem raws li (EU) Tsis muaj. 10/2011 thiab cov khoom lag luam nrog "kev sib cuag" thiab iav thiab diav rawg ntawv (xws li dej cawv).
Tsim kom muaj ib qho traceability system los xyuas kom meej cov khoom siv raw khoom.
US FDA ntawv pov thawj:
Xa zaub mov Daim Ntawv Ceeb Toom Txog Khoom Noj (FCN lossis cov ntawv thov tsis ncaj qha rau cov khoom noj ntxiv, suav nrog kev tsim, txheej txheem thiab cov ntawv xeem.
Tau txais kev pom zoo los ntawm FDA los sau cov khoom "Ua raws li FDA xav tau."
German LFGB Ntawv Pov Thawj:
Hauv EU EU, kev kuaj tshuaj antioxidant ntxiv tau ua tiav raws li BfR Daim Ntawv Pom Zoo XV.
LFGB ntawv pov thawj los ntawm TÜV lossis SGS, thiab lwm yam.
Kev Sib Tw Kev Lag Luam thiab Kev Lag Luam Yav Tom Ntej
(I) Kev Sib Tw
Standard Discrepancies:
Qhov sib txawv ntawm kev txwv kev tsiv teb tsaws thiab kev sim ntawm cov cheeb tsam (xws li, 10 mg / dm2 hauv Suav teb thiab Asmeskas). FDA's 60 mg / kg zaub mov hauv paus) nce nqi kev ua raws cai.
Kev pheej hmoo tshwm sim
Pyrolysis khoom (xws li, qis-molecular- hnyav oxidized hom) yuav ua rau muaj kev pheej hmoo ntawm bioactivity tab sis tsis suav nrog cov qauv tam sim no.
Additive Control:
Tsawg-Cov khoom siv PP tus nqi yuav siv cov khoom siv yas lossis cov tshuaj pleev xim ntau dhau, yuav tsum muaj kev tswj hwm nruj ntawm cov khoom siv raw purity.
(II) Trends
Standard Harmonization:
Kev lag luam loj yog hloov cov qauv rau cov khoom noj khoom haus (xws li kev lees paub kev sib nrig sib paub (EU ISO thiab EU No. 10/2011).
Green Material Innovation:
Nanocomposite PP zaj duab xis uas muaj cov nanoclays ntuj txo cov kev siv cov khoom siv ntxiv thaum ua kom sov.
Supercritical fluid foaming hloov cov tshuaj tshuab tshuab kom txo qhov cuam tshuam rau ib puag ncig.
Intelligent Test Technologies:
AI-hloov siab- cov cuab yeej rhiab heev (GC-MS, LC-MS/MS) ua kom muaj kev txheeb xyuas sai thiab kev pheej hmoo ntawm kev soj ntsuam cov khoom seem.
Xaus:
Kev nyab xeeb ntawm polypropylene zaj duab xis nyob rau hauv ntim khoom noj yuav tsum tau kawg-mus rau-kawg tswj los ntawm "feedstock conformity- qauv kuaj- ntawv pov thawj audit." Cov lag luam yuav tsum ua tib zoo saib xyuas qhov kev hloov kho ntawm cov qauv hauv tsev thiab thoob ntiaj teb (xws li Tuam Tshoj GB4806.7-2023, EU (EU) Tsis muaj 10/2011) thiab tsim cov ntaub ntawv ntawm kev pheej hmoo ntawm kev xaiv cov khoom siv. Nws yog ib qho tseem ceeb kom ua kom zoo tshaj plaws ntawm kev tsim qauv siv tus qauv Tsim Zoo (QbD) txoj kev. Nyob rau hauv lub neej yav tom ntej, kev nce qib hauv nanotechnology thiab cov ntaub ntawv ntsuab yuav tsav cov yeeb yaj kiab polypropylene nyob rau hauv txoj kev nyab xeeb thiab ruaj khov dua, muab kev ruaj ntseg zaub mov muaj zog dua.
