Kamoo Melt Flow Index e Amang Tšebetso ea Liaparo tsa Phofo tsa LDPE

The melt flow index (MI), e tsejoang hape e le sekhahla sa ho phalla ha metsi (MFR), ke letšoao le ka sehloohong la ho lekanya ho qhibiliha ha metsi a polyethylene LDPE phofo tlas'a mocheso o itseng le maemo a khatello. Boleng ba eona bo ama ka ho toba ts'ebetso ea ts'ebetso, boleng ba ho etsa filimi, le thepa ea ho qetela ea 'mele ea ho roala. Lintlha tse latelang ke litlamorao tse ikhethang tsa index ea phallo ea ho qhibiliha ho thepa ea LDPE ea phofshoana:

1. Tšusumetso ho Ts'ebetso ea Ts'ebetso

Fluidity le ho Koaheloa ka Katleho

• MI e phahameng (mohlala,> 20g / 10min): Phofo e qhibilihisitsoeng e bonolo ho jala, e loketseng li-substrates tse nang le libopeho tse rarahaneng, likoti tse tebileng, kapa likheo tse ntle (tse kang liphaephe le likarolo tse khethehileng). E ka tlatsa likheo ka potlako 'me ea fokotsa lintlha tsa ho lutla ha lira.
• Low MI (mohlala, <5g/10min): The melt e na le viscosity e phahameng le ho fokola ha metsi. Nakong ea ho roala, mocheso o phahameng kapa khatello e hlokahalang; ho seng joalo, mathata a kang ho roala ho sa tšoaneng le li-bubble li atisa ho etsahala. E loketse haholoanyane bakeng sa lifofane tse bonolo kapa litlhoko tsa ho roala tse teteaneng (joalo ka holim'a lipoleiti).

Ho Fokotsa Lebelo le Katleho ea Tlhahiso

LDPE e nang le MI e phahameng e folisa mme e fole kapele ka mor'a ho qhibiliha, e ka khutsufatsang nako ea ho folisa moleng oa tlhahiso le ho eketsa ou.tput ka nako ea yuniti; MI e tlase e na le tšekamelo ea ho petsoha ka lebaka la ho honyela ho sa lekanang nakong ea ho pholile ka lebaka la viscosity e phahameng, ka hona e hloka nako e telele ea ho folisa.

2. Ama ka Coating Ponahalo

• Flatness le Glossiness: The melt e nang le MI e phahameng e na le mokelikeli o motle. Ka mor'a ho roala, e ka phalla le ho lekana ka tlhaho, ho etsa seaparo se boreleli le se khanyang, le ho fokotsa likoli tse kang lekhapetla la lamunu le li-pinholes; ho qhibiliha ka MI e tlase ho thata ho phalla le ho ba boemong, 'me bokaholimo ba ho roala bo atisa ho ba bo bohale ka ho phatsima ho tlaase, esita le ho fokotseha (nakong ea ho roala holimo) ho ka etsahala.
• Botenya bo Tšoanang: MI e phahameng e loketse liaparo tse tšesaane (mohlala, 10-50μm), 'me botenya ba junifomo bo ka finyelloa ka ho laola nako ea ho qhibiliha; MI e tlase e loketse haholo bakeng sa liphahlo tse teteaneng (mohlala, 50-200μm), empa palo ea ho roala e hloka ho laoloa ka nepo, ho seng joalo ho bokellana ha lehae kapa botenya bo sa lekaneng ho ka etsahala ka lebaka la metsi a fokolang.

3. Ama ka Thepa ea 'Mele ea Coatings

• Ho khomarela: Liaparo tsa LDPE tse nang le MI e bohareng (mohlala, 5-20g / 10min) li na le ho khomarela hamolemo: ho qhibiliha ha ho khone ho kenella feela ka har'a li-pores tse nyenyane ka holim'a substrate ho theha maqhama a mechine, empa hape ho ke ke ha baka ho kenella ka mokhoa o feteletseng le tahlehelo ka lebaka la ho phalla ho matla haholo (high MI) kapa tlamahano e futsanehileng ka lebaka la ho haella ha metsi a fokolang (MI).
• Ho thatafala le ho Aroha Resistance: Letlapa la LDPE le nang le MI e tlaase le na le ketane e thata ea limolek'hule, 'me seaparo se na le boima bo phahameng le ho hanyetsa ho apara hantle ka mor'a ho pholile, se loketseng maemo a nang le litlhoko tse phahameng holim'a thepa ea mechine (e kang fatše le lisebelisoa tsa lisebelisoa); ho roala ka MI e phahameng ho na le tlhophiso ea limolek'hule tse hlephileng, boima bo tlase, 'me ho bonolo ho ngolisoa, empa ho na le maemo a betere.
• Ho feto-fetoha ha maemo le ho hanyetsa ho amang: Lesela la LDPE le nang le MI e phahameng le na le maemo a ntlafetseng 'me le khona ho mamella deformation e nyenyane ea substrate (e kang ho khumama le ho sisinyeha) ntle le ho phunyeha, e loketseng li-substrates tse senyehang habonolo tse kang li-plastiki le maqephe a tšepe; Thepa e nang le MI e tlase e na le maemo a fokolang 'me e tloaetse ho robeha ha brittle ha e ameha, empa e na le matla a phahameng hanyane.

PECOAT® etsa moralo oa melt flow index (MI) ho latela sehlahisoa se lokelang ho koaheloa.

4.Summary

• Bakeng sa libopeho tse rarahaneng, liphahlo tse tšesaane, le litlhoko tse phahameng tsa gloss → MI e phahameng (mohlala, 20-100g/10min);
• Bakeng sa liphahlo tse teteaneng, boima bo phahameng, le litlhoko tsa ho hanyetsa ho roala → MI e tlaase (mohlala, 0.5-5g/10min);
• Bakeng sa ho khomarela ho leka-lekaneng le maemo a bokahohleng → mahareng MI (mohlala, 5-20g / 10min).

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