Puas yog LDPE Lub Hnab Ua Tshuab Tsim Nyog Rau Cov Ntim Ntim Hnab?

Kev ntim khoom muag yog ib qho ntawm qhov nrawm tshaj plaws - loj hlob ntu ntawm lub ntiaj teb muag ntim khoom lag luam. Qhov nce ntxiv tau tsav los ntawm kev xav tau kev nyab xeeb khoom noj khoom haus, kev thov rau cov khw muag khoom rhawv thiab cov phasing tawm ntawm cov thawv nruj hauv cov khoom siv. Hauv plawv ntawm qhov kev loj hlob no yog ib qho teeb meem siv tau. Feem ntau, cov nroj tsuag hloov pauv thiab cov ntim khoom nug cov lus nug: Puas yog lub hnab LDPE puas muaj peev xwm tsim cov hnab ntim mos uas xav tau hauv cov khoom siv niaj hnub no? Cov lus teb tsis yooj yim. Txhawm rau kom nkag siab zoo, peb yuav tsum kawm ob qho tib si cov ntaub ntawv tshawb fawb ntawm LDPE zaj duab xis thiab kev tsim kho tshuab ntawm kev ua lawv. .

Txhais "Soft Packaging Bags"

Lub sij hawm "soft ntim" npog ntau hom mos ntim khoom siv hauv cov khoom noj, tshuaj, kev tu tus kheej thiab kev siv lub teeb. Cov hom muaj xws li:

• hnab hauv ncoo (peb -ib sab lossis rov qab ntim hnab rau khoom noj txom ncauj, khoom noj khov, khoom qhuav)
• Vertical hnab (pleated hauv qab rau dej haus, kua ntses, zaub mov tsiaj)
• Cov hnab yas tiaj tus (cov ntaub ntawv npog, kev tiv thaiv khaub ncaws, ntim khoom siv kho mob)
• Cov hnab yas (automated packing kab rau ci thiab khoom ua liaj ua teb)
• Cov hnab ntim khoom noj thiab cov hnab ntim khoom noj (cov ntim khoom nyab xeeb rau siab- txhais cov zaub mov raug)
• Liners (dry corrugated sab hauv hauv ob sab phlu)

Hom hnab no qhia qee qhov kev xav tau. Lawv xav tau ib tug℃ntawm clarity. Lawv xav tau kev ua raws li kev noj zaub mov. Lawv yuav tsum muaj lub zog ruaj khov nyob rau hauv lub thickness ntawm zaj duab xis. Lawv yuav tsum tau ua kom haum rau qhov zoo ntawm cov khoom. Tsawg- polyethylene ntom ntom, raws li cov khoom siv, tuaj yeem ua tau raws li ntau yam ntawm cov kev xav tau no. Yog li ntawd, lub hnab LDPE yog ib qho kev xaiv ntuj.

Vim li cas LDPE Yog Ib Lub Ntuj Haum Rau Cov Ntim Ntim

Tsawg ntom ntom polyethylene yog cov khoom siv sab saum toj hauv cov khoom ntim muag. Qhov no yog vim nws cov qauv polymer. Tsawg- ntom polyethylene (LDPE) yog tsim los ntawm polymerization ntawm cov dawb radicals nyob rau hauv siab. Qhov no tsim ib tug heev branched molecular qauv. Cov qauv no muab cov yeeb yaj kiab tshwj xeeb sib xyaw:

Optical clarity:LDPE zaj duab xis muaj pos huab thiab zoo optical permeability. Qhov no yog qhov zoo rau kev ntim khoom qhov twg koj yuav tsum pom cov khoom. Cov khoom lag luam tshiab, khoom noj khoom haus thiab kev tiv thaiv khaub ncaws yog cov piv txwv zoo tshaj plaws.

Mos rau qhov kov:branching txo qhov ceev ntawm cov saw packing ceev. Cov yeeb yaj kiab uas tau tshwm sim yog mos thiab hloov tau, nrog kev xav zoo. Qhov kev xav ntawd suav rau ntau hauv cov khoom muag muag muag. Yog tsis hloov cov mis, nws yog ib qho nyuaj kom phim nws rau cov ntaub ntawv nyuaj xws li siab - ntom polyethylene los yog polypropylene.

Wide Sealed Qhov rai:Low Density Polyethylene tau kaw zoo thiab muaj qhov kub ntawm 100-150℃. Qhov ntau yam no ua rau nws yooj yim los tsim dua li cov polyethylene high-density los yog cov yeeb yaj kiab qhia. Lawv yog ntau me me sealing ranges.

Stretching thiab puncture kuj:LDPE tuaj yeem ncab ntau ua ntej tawg (300-600% nyob ntawm qib thiab tuab). Qhov no tso cai rau cov hnab ntim khoom muag los tuav cov khoom tsis zoo - zoo li tsis muaj kua muag. Qhov no yog qhov tshwj xeeb tshaj yog rau kev ua thiab khov cov zaub mov vim lawv cov npoo ntse lossis khib- cov duab zoo li.

FDA thiab Food Exposure Compliance: Ntau qib LDPE siv rau cov zaub mov raug ua raws li FDA Tsoom Fwv Teb Chaws Code 21 §177.1520 thiab EU Txoj Cai 10/2011 ntawm Cov Khoom Siv Yas Hauv Zaub Mov. Qhov no yog qhov tseem ceeb rau kev siv cov ntim khoom noj ncaj qha . .

Dab tsi LDPE Hnab Ua Tshuab Ua Zoo hauv Cov Ntim Ntim

Lub hnab LDPE rau cov ntim khoom muag muaj qhov zoo hauv qab no:

Siab- nrawm nrawm- lub hnab ntim khoom

Rau cov hnab ntim yooj yim, hauv qab thiab phab ntsa, uas tau siv dav hauv kev pabcuam zaub mov thiab tsim khoom, lub tshuab LDPE khiav 20-80 micron LDPE films ua haujlwm ntawm tus nqi ntawm 150-400 cycles ib feeb. Qhov kev ceev no yog ua tau vim LDPE lub qhov rais qhib dav thiab txiav yooj yim tso cai rau kev mus nrawm dua. Koj tsis tas yuav muaj kev tswj hwm nruj ntawm HDPE lossis multilayer membranes.

Txias -Hniav Txiav Compatibility

LDPE yog tsim rau kev sib khi thiab txiav nrog rab riam txias (shearing lossis nias). Kub hlau txiav yog HDPE zoo dua sealing thiab txiav nyhuv. Ntxuav txiav nrog cov hniav txias tom qab ib txwm tuab LDPE kub sealing. Qhov no ua rau lub cutter yooj yim dua. Nws kuj tseem txo qhov kev xav tau ntawm kev saib xyuas ntawm lub tshuab txiav.

Multi-Format Flexibility nyob rau hauv nruab nrab ntsuas

Lub qhov dej-set LDPE hnab feem ntau tuaj yeem ua ntau yam ntawm cov yeeb yaj kiab tuab (feem ntau 20-120 microns) thiab lub hnab dav. Koj tsis tas yuav hloov pauv loj rau lub tshuab hloov. Cov hloov pauv tuaj yeem khiav cov khoom sib txawv ntawm tib kab los ntawm kev hloov chaw es tsis yog sib pauv qhov chaw.

Compatibility nrog Printed Zaj duab xis

Cov ntim mos feem ntau siv cov ntawv luam tawm. Qhov no tuaj yeem ua tau inline luam tawm ua ntej lub hnab ntim khoom, lossis ua ntej - cov menyuam luam ntawv tuaj yeem muab tso rau hauv lub tshuab. Thaum koj siv corona los kho LDPE ntawm cov yeeb yaj kiab theem, qhov chaw ua haujlwm nrog flexographic thiab gravure inks. Lub tshuab LDPE hnab nrog EPC (Edge Position Control) system tuaj yeem ua cov ntawv luam tawm ntawm zaj duab xis. Qhov no khaws cov ntiv tes nyob rau hauv tib qhov chaw ntawm txhua lub hnab

Qhov twg LDPE Hnab Machines ntsej muag txwv nyob rau hauv mos ntim

Txawm hais tias LDPE cov khoom ua tau raws li cov kev xav tau ntawm kev ntim khoom muag, nws muaj qee qhov kev txwv. Cov kev txwv no txhais tau tias lub hnab LDPE tsis yog qhov kev xaiv zoo tshaj plaws: :

1. High-Cov Zaj Duab Xis Laminated

Ntau yam niaj hnub mos- siv ntim khoom, tshwj xeeb tshaj yog nyob rau hauv cov khoom noj, tshuaj thiab cov khoom siv kho mob, yuav tsum muaj cov ntaub thaiv npog siab. Cov yeeb yaj kiab ua ke nrog LDPE nrog txhuas ntawv ci, EVOH (ethylene vinyl cawv copolymer), PET (polyethylene terephthalate) los yog nylon (PA) los tsim cov txheej txheem ntau.

Cov yeeb yaj kiab laminated no ua haujlwm txawv ntawm ib qho - txheej LDPE:

• Cov khaubncaws sab nraud povtseg feem ntau yog qhov ntom ntom polyethylene lossis metallocene PE, tsis yog LDPE li niaj zaus.
• Lub foob kub thiab lub sij hawm yuav tsum tau teem kom zoo dua. Txhua yam koj yuav tsum tau ua yog kaw sab hauv yam tsis muaj kev puas tsuaj txheej txheej.
• Cov laminates nyuaj dua. Qhov no txhais tau tias koj xav tau kev tswj nruj dua li monolayer LDPE zaj duab xis.

Tus qauv LDPE hnab tshuab rau monolayer zaj duab xis yuav tsis muaj kev tswj nruj, qhov tseeb ntawm qhov kub thiab txias lossis zaj duab xis tuav yuav tsum muaj rau cov laminates nyuaj. Cov tshuab uas tsim laminated mos ntim feem ntau muaj cov tshuab ua las voos zoo dua, PID-tswj qhov chaw sib khi, thiab kev sau npe ua yeeb yaj kiab nruj dua.

2. Sawv ntsug-Up Pouch Production

Lub hnab sawv ntsug yuav tsum mus rau hauv qab gusseted kom lub hnab ntim ncaj thaum puv. Ua hom ntawv no yuav tsum tau:

Cov khaubncaws sab nraud povtseg feem ntau yog qhov ntom ntom polyethylene lossis metallocene PE, tsis yog LDPE li niaj zaus.

Lub foob kub thiab lub sij hawm yuav tsum tau teem kom zoo dua. Txhua yam koj yuav tsum tau ua yog kaw sab hauv yam tsis muaj kev puas tsuaj txheej txheej.

Cov laminates nyuaj dua. Qhov no txhais tau tias koj xav tau kev tswj nruj dua li monolayer LDPE zaj duab xis.

Tus qauv LDPE hnab tshuab rau monolayer zaj duab xis yuav tsis muaj kev tswj nruj, qhov tseeb ntawm qhov kub thiab txias lossis zaj duab xis tuav yuav tsum muaj rau cov laminates nyuaj. Cov tshuab uas tsim laminated mos ntim feem ntau muaj cov tshuab ua las voos zoo dua, PID-tswj qhov chaw sib khi, thiab kev sau npe ua yeeb yaj kiab nruj dua.

3. Nyias Gauge Films (hauv qab 15 Microns)

Qee cov khoom noj tau ntim hauv LDPE nyias (12-18 microns). Qhov no yuav txuag tau cov nqi khoom siv. Ntawm qhov tuab no, nws yog qhov nyuaj rau kev ua cov yeeb yaj kiab. Yog tias qhov nro hloov me ntsis, zaj duab xis tuaj yeem tsim kua muag tau yooj yim. Static cling ua rau muaj teeb meem taug qab. Lub sealing ntau kuj yog nqaim dua li qub.

Ib qho yooj yim LDPE lub hnab ntim tshuab tsis muaj kev tswj nruj nruj (servo-tsav kev nthuav dav, kev ua las voos yob hloov kho) thiab cov txheej txheem antistatic, uas nkim sij hawm ntau dhau ntawm cov yeeb yaj kiab nyias. Nws yog ib qho teeb meem ntawm lub tshuab specification. Nws tsis yog hais txog cov khoom nws tus kheej. Tab sis qhov ntawd txhais tau hais tias tsis yog txhua lub hnab ntim LDPE yog tsim rau nyias, mos ntim.

Cov khoom sib txawv: LLDPE thiab mLLDPE hauv Soft Ntim

Nws yuav tsum raug sau tseg tias niaj hnub no "soft ntim" feem ntau siv LLDPE (linear low-density polyethylene) thiab metallocene (mLLDPE), es tsis yog LDPE li niaj zaus. Cov ntaub ntawv no muab:

• Lub zog tensile siab thiab nkag mus rau tib yam lossis qis dua thickness (yog li koj tuaj yeem siv cov khoom siv tsawg)
• Thaum qis sealing kub, lub foob muaj zog dua
• Zoo dua kub- muag kev ua tau zoo (tseem ceeb rau Vertical Filling Sealers)

Tsawg-cov hnab ntim khoom polyethylene (LDPE) feem ntau tuaj yeem ua rau LLDPE zaj duab xis. Foob qhov kub ntawm qhov sib tshooj. Tsawg ntom polyethylene yog softer dua HDPE. Tab sis LLDPE muaj kev sib txhuam coefficient siab. Qhov no tuaj yeem ua rau muaj teeb meem taug qab zaj duab xis ntawm cov tshuab tsis muaj electrostatic rods thiab tsis tshua muaj kev sib txhuam ntawm cov tsheb ciav hlau. Cov neeg ua haujlwm uas hloov los ntawm qhov qis- ntom polyethylene mus rau qis- ntom polyethylene ntawm tib lub tshuab feem ntau yuav tsum tau hloov qhov nro, lub sij hawm sib khi thiab ua tiav ntawm cov ntawv qhia yob.

Kev hloov ntawm cov khoom siv no tuaj yeem ua haujlwm ntawm cov khoom siv ntawm cov tshuab. Tab sis koj xav tau cov ntawv sau thiab kev cob qhia tus neeg teb xov tooj.

Ntsiab Tshuab Specifications rau Soft Packing Applications

Rau cov tshuab ntim khoom ib lub tshuab LDPE tau teev tseg rau cov kev pabcuam ntim mos, cov hauv qab no tsis hloov pauv tau:

Cov qauv tsim nyog rau kev ntim khoom muag muag ntawm LDPE Machinery

Cov kev cai zoo thiab cov khoom siv rau kev tsim cov hnab ntim khoom LDPE yog ua raws li cov hauv qab no:

• TS EN ISO 11607-1 Cov cai rau ntim cov khoom siv tshuaj tua kab mob (txog rau cov hnab kho mob LDPE)
• FDA 21 CFR § 177.1520: Olefin polymers -cov npe ntawm cov zaub mov raug pom zoo polyethylene
• EU Txoj Cai (EC) Tsis yog. 10/2011: Cov yas siv los kov cov zaub mov siv rau LDPE ntim zaub mov hauv Europe
• ASTM D882: Kev ntsuas tus qauv rau cov khoom tensile ntawm nyias cov ntawv yas - kuaj xyuas qhov tsim nyog ntawm lub zog txhua zaus siv cov hnab yas
• TS EN ISO 15105-1 Kev ntsuas kev sib kis ntawm cov pa roj rau cov yeeb yaj kiab yas thiab daim ntawv
• Tau qhov twg los: EU Txoj Cai (EU) Tsis muaj. 10/2011 - Cov ntaub ntawv yas thiab cov khoom siv rau kev sib cuag nrog zaub mov, Cov Ntawv Xov Xwm ntawm European Union.

Cov ntsiab lus

Lub hnab LDPE yog qhov zoo tiag tiag rau ntau lub hnab mos. Tshwj xeeb tshaj yog tsim rau lub hnab tiaj tus, lub hnab hauv qab, lub hnab ntim khoom, lub hnab khob cij, lub hnab liner hnab thiab lub hnab hauv ob sab phlu ua los ntawm ib txheej los yog yooj yim co-extruded LDPE zaj duab xis. LDPE qhov kev pom tseeb, kev sib khi dav, kev sib cuag nrog cov khoom noj thiab kev xav mos ua rau nws xaiv ntuj rau cov hom hnab no. Lub tshuab hom yog tsim los ua kom siv tau zoo ntawm cov yam ntxwv no.

Tab sis cov kev txwv yog tiag tiag. Complex multilayer barrier laminates, sawv pouches, nyias nyias, thiab siv yuav tsum tau kaw cov ntawv sau npe tag nrho yuav tsum tau zoo dua tshuab specifications. Ib qho yooj yim qis-lub hnab ntim polyethylene yuav tsis tuaj yeem ua tau raws li cov kev xav tau no yam tsis muaj kev hloov kho tshwj xeeb. Thaum siv lub tshuab LDPE, zaj duab xis qauv, hom hnab, thickness ntau thiab cov kev xav tau zoo yuav tsum tau nkag siab meej. Koj yuav tsum tsis txhob xav tias LDPE cov cav tov tuav cov ntim mos.

Thaum koj phim lub peev xwm tshuab thiab ua haujlwm kom raug, lub hnab LDPE tseem yog ib qho ntawm cov khoom tsim tau thiab tus nqi ntau tshaj -cov kev xaiv zoo hauv cov khoom ntim muag.

Cov ntaub ntawv:

• Emblem, A. & Emblem, H. – Packaging Technology: Fundamentals, Materials and Processes, Woodhead Publishing (Elsevier), 2012
• Robertson, GL – Food Packaging: Principles and Practice, 3rd Edition, CRC Press, 2012
• Briston, JH – Plastics Films, 3rd Edition, Longman Scientific & Technical, 1989
• Soroka, W. – Fundamentals of Packaging Technology, 4th Edition, Institute of Packaging Professionals (IoPP), 2009
• Glanvill, AB – Plastics Engineer's Data Book, Mechanical Engineering Publications, 1993
• EU Txoj Cai No. 10/2011 - Cov Khoom Siv thiab Cov Khoom Siv Yas Lub Hom Phiaj Los Tiv Thaiv Cov Khoom Noj, Cov Ntawv Xov Xwm ntawm European Union
• ASTM D882-18 - Txuj kev xeem rau Tensile Properties ntawm nyias yas Sheeting, ASTM International