Keeb kwm ntawm cov khoom no tau pib txawv teb chaws nyob rau hauv nruab nrab ntawm lub xyoo pua xeem,. Nws tau siv los ntim cov khoom noj khoom haus. Kev ua yeeb yaj kiab yog qhov tshwm sim los ntawm ntau qhov kev hloov kho ntawm cov tshuaj muaj pes tsawg leeg thiab tso tawm cov thev naus laus zis, uas muab nws nrog ntau yam thiab qib siab ntawm kev siv.
Composition
Cov khoom muaj los ntawm cov txheej txheem polyethylene zaj duab xis thiab nws lub hom phiaj nyob ntawm seb muaj pes tsawg leeg:
- High Density Polyethylene (LDPE).
- YHigh Density Polyethylene (HDPE).
- Linear LDPE nrog hloov kho muaj pes tsawg leeg.
- Cov kev hloov pauv: piv txwv li, LDPE thiab HDPE, nrog polypropylene.
Specifications
Polyethylene tsis muaj tshuaj lom, belongs rau pawg ntawm cov khoom siv hluav taws xob tsis muaj tshuaj lom nrog qhov kub ntawm qhov kub ntawm 300 ° C, lwm yam ntxwv nyob ntawm seb muaj pes tsawg leeg:
Polyethylene zaj duab xis qissiab:
- Mechanically muaj zog cov khoom (0.94÷0.96 g / cm 2).
- Resistant mus rau qhov kub thiab txias (ntev tus nqi ntawm 112 C°).
- Resistant qauv rau edible rog, roj. Neutral rau acidic thiab alkaline tshuaj.
- Qhov tsis zoo yog qib siab permeability, yuav luag 6 npaug siab dua VD zaj duab xis. Kev sib cuag nrog hydrocarbons yog qhov tsim nyog thiab tsis xav tau - nrog cov tshuaj oxidizing yooj yim.
- Technical zaj duab xis raws li qhov tsis tshua muaj siab polyethylene yog qhov tseem ceeb rau cov khoom ntim khoom raug rau kom tsis muaj menyuam thiab qee yam khoom noj khoom haus.
High density polyethylene zaj duab xis:
- Ntau qhov ceev ntawm 0.91÷093 g / cm2.
- Lub zog tensile nruab nrab.
- Tsawg ntws tso cai rau vuam ntawm cov khoom.
- Frost-resistant: mus txog -60º.
- Yooj yim pleev xim rau saum npoo.
Linear LDPE: lub hauv paus rau kev tsim cov yeeb yaj kiab stretch multilayer.
Txhua yam khoom tsim tawm yuav tsum ua raws li tsoomfwv cov cai:
- Technical polyethylene zaj duab xis - GOST 10354 - 82.
- Shrinkable polyethylene - GOST 25951 - 83.
- HDPE GOST 16338 - 85.
- LDPE GOST 16337 - 77.
Production
Technical zaj duab xis yog tsim los ntawm extrusion technology nyob rau hauv ob peb theem:
Melting thiab tshuab ntawm ib nrab-kua muaj pes tsawg leeg dhau los ntawm ntau hom nozzles ntawm qhov hluav taws xob:
- Ntiv nplhaib, muab lub tes tsho hom ntim. Nyob rau ntawm qhov tawm ntawm lub nozzle, cov khoom yog tshuab thiab qhuav raws li tag nrho ntev, ua raws li nruj nreem rau cov chais thiab winding tag nrho-fledged yob. Cov txheej txheem ua haujlwm hnyav uas tso cai rau koj kom tau daim ntaub ntev txog 2400 hli.
- Flat, tso cai rau koj kom tau txais daim ntawv ncaj qha. Tom qab extrusion, cov khoom yog qhuav, ncab thiab txiav. Qhov no yog kev siv tshuab sai dua, tab sis cov ntawv polyethylene tsis pub tshaj 1.5 m.
Polyethylene tau hloov kho kom tau txais cov khoom siv nrog cov khoom xav tau:
- Tshuaj, nrog rau qhov sib ntxiv ntawm qee yam khoom.
- Mechanical, los ntawm ncab.
- "Stitching" siv hluav taws xob ion
- Thermal stabilization. Tom qab kev kho cua sov, cov qauv ntawm cov khoom yuav tiv taus ntau dua rau kev puas tsuaj.
Technical film: yam ntxwv thiab hom khoom tiav
Nyob ntawm qhov kev hloov pauv ntawm cov khoom noj khoom haus, cov nram qab no cov khoom siv polyethylene tuaj yeem pom ntawm muag:
- Lub teeb ruaj khov: tiv taus lub hnub ci hluav taws xob, kev pab cuam lub neej nyob ntawm qhov concentration ntawm stabilizers. Muaj cov xim ci: daj, ntsuab thiab lwm yam.
- Shrinkable: thaum rhuab, nws hloov nws qhov loj me, haum cov khoom hauv. Linen dav txog 150 hli, lub tes tsho ntev txog 2500 hli.
Shrink:
- Longitudinal: 40 txog 80%.
- Side: 10÷50%.
- Composite shrink:Ntau hom txheej txheej nrog qhov sib ntxiv ntawm cov tshuaj reagents uas hloov cov cuab yeej ntawm cov khoom mus rau cov yam ntxwv xav tau.
- Txhim kho: kev ua yeeb yaj kiab nrog lub mesh ntawm polypropylene lossis polyethylene.
- Pob tshab: raw khoom - LDPE. Ethylene vinyl acetate copolymer hydrophilic zaj duab xis tau nce pob tshab.
- Xim: khoom siv - LDPE, dyes, stabilizers.
Technical polyethylene zaj duab xis: daim ntaub ntawv
Ntau hom tso cai siv polyethylene hauv yuav luag txhua qhov chaw ntawm tib neeg kev ua ub no:
Kev tsim kho: nyob rau hauv daim ntawv ntawm lub tes tsho lossis canvas, thickness 60÷200 microns. Siv los qhwv thiab npog cov khoom pallets thiab ua kom cov chaw tsis muaj paug
Agriculture:
- Technical zaj duab xis nrog cov xim dub: ntau hom kev ua haujlwm, suav nrog kev npog tua "rau chav" (thickness ntawm 60 microns), mulching, ntom 10÷60 microns.
- Hydrophilic nrog nce pob tshab: rau tsev cog khoom.
Ntim:
- Thermoshrinkable zaj duab xis (lub tes tsho, ntaub) los ntawm thawj thiab theem nrab, cov khoom pheej yig dua.
- Nyob rau hauv lub hnab: rau ntim cov khib nyiab thiab pov tseg.
Technical polyethylene zaj duab xis muaj ntau yam khoom siv uas tso cai rau koj los ua kom tau raws li qhov xav tau ntawm tus neeg yuav khoom. Lub ntsiab tsis zoo yog lub sij hawm decomposition siab ntawm cov khoom thiab qib qis ntawm nws cov kev ua.
