Zaj duab xis Technology: hom, yam ntxwv, daim ntawv thov chaw

Lub keeb kwm ntawm no cov ntaub ntawv uas pib txawv teb chaws txawm nyob rau hauv nruab nrab ntawm lub xeem caug xyoo,. Nws siv rau cov packing ntawm cov khoom hauv lub lag luam ua noj. Tus zaj duab xis yog lub txiaj ntsim los ntawm ntau yam kev hloov ntawm cov tshuaj muaj pes tsawg leeg thiab zus tau tej cov technologies uas tau muab nws nrog ib tug ntau yam ntawm cov khoom thiab ib theem siab ntawm kev siv.

qauv

Properties muaj los ntawm cov kev yas zaj duab xis, thiab nws cov hom phiaj nyob ntawm seb muaj pes tsawg leeg:

• High siab polyethylene muaj ib tug uas tsis muaj kev ceev (LDPE).
• Tsawg-siab polyethylene muaj ib tug tuab qauv (HDPE).
• Tawm LDPE nrog ib tug hloov pes tsawg leeg.
• Variations ntawm compound: piv txwv li, LDPE thiab HDPE, polypropylene.

kev uas yuav tsum tau

Lub polyethylene yog tsis lom, yog non-toxic pab pawg neeg cov khoom uas muaj ib tug flash point ntawm 300 ° C, tus lwm yam ntxwv yog nyob ntawm seb muaj pes tsawg leeg:

Polyethylene zaj duab xis ntawm tsis tshua muaj siab:

• Mechanically check khoom (0,94 ÷ 0,96 g / cm ^2).
• Ruaj siab kub (ndlwg hom ntawm 112 C °).
• Pheej qauv rau siav nqaijrog thiab roj. Nruab nrab rau acidic thiab alkaline tshuaj.
• Tsis - siab permeability theem, ze li ntawm 6 lub sij hawm ntau tshaj li qhov HP zaj duab xis. Invalid kev sib cuag nrog hydrocarbons thiab undesirable - nrog yooj yim oxidizable tshuaj.
• Zaj duab xis Technology raws li HDPE yog indispensable rau lub ntim cov khoom niaj kom tsis muaj menyuam, thiab cov ntau yam ntawm zaub mov.

Lub polyethylene zaj duab xis ntawm kev kub siab:

• Nws muaj ib tug ntom ntawm 0,91 ÷ 093 g / cm ^2.
• Tsim Nyog tensile zog.
• Ib tug uas tsis muaj tus nqi ndlwg tso cai rau weld khoom daim.
• Frost kuj: mus txog - 60C °.
• Nyob rau saum npoo ntawm cov xim muaj hlau yog ib qho yooj yim mus ua ntawv thov.

Tawm LDPE: ib tug lub moj khaum rau lub creation ntawm stretch multilayer films.

Txhua yam ntawm cov ntaub ntawv uas ua yuav tsum tau raws li cov uas yuav tsum tau ntawm lub xeev ntxawg cov ntaub ntawv:

• Yas zaj duab xis kev - GOST 10354 - 82.
• Polyethylene ntsws - GOST 25951 - 83.
• HDPE GOST 16338 - 85.
• LDPE GOST 16337 - 77.

ntau lawm

Kev zaj duab xis yog ua los ntawm extrusion hom kev kawm nyob rau hauv ob peb theem:

• Melting thiab tshuab ntawm semi-kua muaj pes tsawg leeg, lub kis tso zis los ntawm ntau hom kab los ntxias:

1. Nplhaib, muab qhov zoo ntawm lub hnab ntim. Thaum lub qhov hluav taws xob ntawm lub nozzle khoom swells thiab yog qhuav dhau tag nrho ntev, nrog rau tom ntej zawm ntawm lub drums thiab tag nrho-lub qhov txhab coils. Lub sij hawm-siv, uas tso cai rau kom tau txais cov canvas rau 2400 hli nyob rau hauv ntev.
2. Pav ca, tso cai rau direct zaj duab xis daim ntawv. Tom qab extrusion, cov khoom yog qhuav, ncav us txog thiab txiav. Qhov no sai technology, tab sis lub polyethylene los xij tsis pub tshaj 1.5 m.

• Polyethylene ncua kev hloov kho los tsim ib cov ntaub ntawv uas nrog cov yam zog:

1. Tshuaj, nrog rau qhov sib ntxiv ntawm cov kev hais.
2. Neeg kho tshuab los ntawm kev ncab.
3. "Crosslinking" los ntawm ion tawg
4. Thermal stabilization. Tom qab thaum tshav kub kub kev kho mob, cov ntaub qauv yuav ntau resistant rau cov neeg kho tshuab kev puas tsuaj.

Kev zaj duab xis: tus yam ntxwv thiab hom ntawm tiav lawm cov khoom

Nyob rau hauv lub feedstock muag hloov tau pom hauv qab no kev polyethylene:

• Svetostabilizirovany: muaj ib tug high kuj mus hnub ci tawg, lub neej nyob rau hauv lub concentration ntawm stabilizers. Nws muaj qaim xim: daj, ntsuab thiab thiaj li nyob.
• Ntsws: thaum rhuab hloov nws loj, obtyagivaya khoom nyob hauv. web dav ntawm 150 mm rau 2500 hli tsho.

shrinkage:

1. Longitudinal: 40 mus rau 80%.
2. Transverse: 10 ÷ 50%.

• Lub puas ntsws: yam txawv ntawm lo nrog rau qhov sib ntxiv ntawm reagents uas hloov cov ntaub ntawv uas cov khoom nyob rau hauv yuav tsum tau yam ntxwv.
• Tam: Zaj duab xis Technology nrog mesh ntawm polypropylene los yog polyethylene.
• Pob tshab: qhov khoom - HDPE. Hydrophilic ethylene copolymer zaj duab xis tau zoo transparency.
• Xim: Khoom - HDPE, colorants, stabilizers.

Polyethylene zaj duab xis Kev: Cov ntawv thov

Qhov ntau haiv hom tso cai rau kev siv ntawm polyethylene nyob rau hauv yuav luag tag nrho cov spheres ntawm tib neeg kev ua si:

• Siv cov kev faib: nyob rau hauv lub hauv daim ntawv ntawm ib tug lub tes tsho los yog webs, thickness 60 ÷ 200 microns. Siv rau lub ntim khoom seem txheej thiab cover ntaub ntawv thiab kev tiv thaiv cov hniav los ntawm kab mob sib kis.

• Agriculture:

1. Zaj duab xis Technology dub xim: ntau hom ntawm cov ntaub ntawv, xws li yuav tsum vov "nyob rau hauv chav" tua (thickness 60 microns), Vov, ceev 10 ÷ 60 microns.
2. Hydrophilic enhanced transparency: rau greenhouses.

• packing:

1. Ntsws zaj duab xis (tes tsho canvas) ntawm cov thawj thiab theem nrab, pheej yig dua raw cov ntaub ntawv.
2. Nyob rau hauv daim ntawv ntawm lub hnab: rau lub ntim khib nyiab thiab pov tseg.

Polyethylene zaj duab xis muaj ib tug loj ntau ntawm cov technical, yuav siav muaj siab xav ntawm cov buyer. Lub ntsiab drawback - nws yog ib tug siab lub sij hawm ntawm lub decomposition ntawm cov khoom thiab cov uas tsis muaj theem ntawm kev.