Na U Tseba Litlhokomelo Tsee Bakeng sa Li-Preforms tsa PET?

PET Preforms

Tlas'a mocheso le khatello e itseng, hlobo e tlatsitsoe ka lisebelisoa tse tala, 'me tlas'a ts'ebetso ea mochine oa ho bopa ente, e etsoa ka preform e nang le botenya bo itseng le bophahamo bo lumellanang le hlobo. PET preforms reprocessed by blowing molding ho etsa libotlolo tsa polasetiki, ho kenyelletsa le libotlolo tse sebelisoang litlolo, meriana, tlhokomelo ea bophelo bo botle, lino, metsi a liminerale, li-reagents, joalo-joalo Mokhoa oa ho etsa libotlolo tsa polasetiki tsa PET ka ho phunya.

1. Litšobotsi tsa PET Raw Materials
Ponahalo e phahame ho feta 90%, khanya ea bokaholimo e ntle haholo, 'me ponahalo ke ea khalase; ho boloka monko o monate, moea o thata o motle; khanyetso ea lik'hemik'hale e ntle haholo, 'me hoo e batlang e le lithethefatsi tsohle tsa manyolo li hanana le li-acids; thepa ea bohloeki e ntle; e ke ke ea chesa Khase e chefo e hlahisoa; litšoaneleho tsa matla li ntle haholo, 'me litšobotsi tse fapaneng li ka ntlafatsoa ka ho otlolla biaxial.

2. Mongobo o omileng
Hobane PET e na le tekanyo e itseng ea ho monya metsi, e tla monya metsi a mangata nakong ea lipalangoang, polokelo le tšebeliso. Boemo bo phahameng ba mongobo bo tla mpefala nakong ea tlhahiso:

- Keketseho ea AA (Acetaldehyde) acetaldehyde.

Phello e nkhang hamonate libotlolong, e bakang tatso e sa tsitsang (empa e na le phello e nyane ho batho)

- IV (IntrinsicViscosity) ho theoha ha viscosity.

E ama khatello ea khatello ea botlolo 'me e bonolo ho senya. (Mohloli o bakoa ke ho senyeha ha hydrolytic ea PET)

Ka nako e ts'oanang, etsa litokisetso tse phahameng tsa mocheso bakeng sa PET ho kenya mochine oa ho bopa ente bakeng sa ho kuta polasetiki.

3. Ho omisa Litlhoko
Ho omisa mocheso sete 165 ℃-175 ℃

Nako ea ho phomola lihora tse 4-6

Thempereichara ea koung ea phepelo e ka holimo ho 160°C

Monyo o ka tlase ho -30 ℃

Phallo ea moea o omileng 3.7m⊃3; /h ka kg/h

4. Ho omella
Mongobo o loketseng ka mor'a ho omisa ke hoo e ka bang: 0.001-0.004%

Ho omella ho feteletseng le hona ho ka mpefatsa:

- Keketseho ea AA (Acetaldehyde) acetaldehyde

-IV (IntrinsicViscosity) ho theoha ha viscosity

(Haholo-holo e bakoa ke ho senyeha ha oxidative ea PET)

5. Lintlha tse robeli tsa ho bopa ka ente
1). Ho lahla Plastiki

Kaha li-macromolecules tsa PET li na le lihlopha tsa lipid 'me li na le tekanyo e itseng ea hydrophilicity, li-pellets li na le bothata ba metsi ka mocheso o phahameng. Ha mongobo o feta tekanyo, boima ba molek'hule ea PET bo fokotseha nakong ea ts'ebetso, 'me sehlahisoa se fetoha' mala 'me se robehe.
Ka hona, pele ho sebetsa, thepa e tlameha ho omisoa, 'me mocheso oa ho omisa ke 150 ° C ka lihora tse fetang 4; ka kakaretso 170 ° C bakeng sa lihora tse 3-4. Ho omella ho feletseng ha thepa ho ka hlahlojoa ka mokhoa oa ho thunya moea. Ka kakaretso, karolo ea lisebelisoa tsa PET tse nchafalitsoeng ha ea lokela ho feta 25%, 'me lisebelisoa tse nchafalitsoeng li lokela ho omisoa hantle.

2). Khetho ea Mochini oa Mochini oa Ente

Ka lebaka la nako e khuts'oane e tsitsitseng ea PET kamora sebaka se qhibilihang le sebaka se phahameng sa ho qhibiliha, hoa hlokahala ho khetha sistimi ea ente e nang le likarolo tse ngata tsa taolo ea mocheso le ho fokotsa mocheso o fokolang oa mocheso nakong ea polasetiki, le boima ba 'nete ba sehlahisoa (metsi). -containing material) ha ea lokela ho ba tlase ho feta ente ea mochine. 2/3 ea chelete.

3). Moqapi oa Mold le Heke

Li-preforms tsa PET hangata li entsoe ke hlobo e chesang e chesang. Ho molemo ho ba le thebe ea mocheso pakeng tsa hlobo le thempleite ea mochini oa ente. Botenya ba thebe ea mocheso ke hoo e ka bang 12mm, 'me thebe ea mocheso e tlameha ho khona ho mamella khatello e phahameng. Moholi o tlameha ho lekana ho qoba mocheso o feteletseng kapa ho arohana, empa botebo ba kou ea ho ntša metsi hangata ha boa lokela ho feta 0.03mm, ho seng joalo ho benya ho tla hlaha habonolo.

4). Qhibiliha Mocheso

E ka lekanyetsoa ka mokhoa oa ente ea moea, ho tloha ho 270-295 ° C, 'me boemo bo ntlafetseng ba GF-PET bo ka behoa ho 290-315 ° C, joalo-joalo.

5). Lebelo la Ente

Ka kakaretso, lebelo la ente le lokela ho potlaka ho thibela coagulation pele ho nako nakong ea ente. Empa ka potlako haholo, sekhahla sa ho kuta se phahame, se etsa hore thepa e brittle. Hangata ente e etsoa nakong ea metsotsoana e 4.

6). Khatello ea Morao

E tlase e molemo ho qoba ho senya le ho taboha. Ka kakaretso ha e fete 100bar, hangata ha ho hlokahale hore e sebelisoe.
7). Nako ea ho Lula

Se ke oa sebelisa nako e telele haholo ea ho lula ho thibela ho fokotseha ha boima ba limolek'hule, 'me u leke ho qoba mocheso o ka holimo ho 300°C. Haeba mochine o koetsoe ka nako e ka tlaase ho metsotso e 15, o hloka feela ho phekoloa ka ente ea moea; haeba e feta metsotso e 15, e tlameha ho hloekisoa ka viscosity PE, 'me mocheso oa mochine oa mochine o lokela ho theoleloa mocheso oa PE ho fihlela o buloa hape.
8). Mehato ya tlhokomelo

Lisebelisoa tse tsosolositsoeng ha lia lokela ho ba tse kholo haholo, ho seng joalo, ho bonolo ho baka "borokho" sebakeng sa ho itšeha le ho ama polasetiki; haeba mocheso oa mocheso oa hlobo o se motle, kapa mocheso oa thepa o sa laoloe hantle, ho bonolo ho hlahisa "moholi o mosoeu" le opaque; mocheso oa hlobo o tlase ebile o ts'oana, Lebelo la ho pholisa le potlakile, crystallization e fokotseha, 'me sehlahisoa se hlakile.