Fomula yosinthidwa ya PE, ntchito ndi magwiridwe antchito

Makina owonjezera a pulasitiki a PE Ndi imodzi mwa mapulasitiki asanu omwe amagwiritsidwa ntchito kwambiri. Ndi utomoni wa thermoplastic wopangidwa kuchokera ku polymerization ya ethylene monomer. Ndi yopanda fungo komanso yopanda poizoni, imamveka ngati sera, imakhala yolimba bwino kutentha kochepa komanso imakhala yolimba.

Kuphatikiza apo, PE ili ndi madzi ochepa, sisungunuka mu zosungunulira zonse kutentha kwa chipinda, ndipo ili ndi kutchinjiriza kwabwino kwamagetsi. Kutengera njira ya polymerization, kulemera kwa mamolekyulu, ndi kapangidwe ka unyolo, imagawidwa m'magulu awiri: high-density polyethylene (HDPE), low-density polyethylene (LDPE), ndi linear low-density polyethylene. Density polyethylene (LLDPE) ndi ultra-high molecular weight polyethylene (UHMWPE).

Chifukwa cha kugwiritsidwa ntchito kwake kwakukulu, PE nthawi zambiri imagwiritsidwa ntchito ikasinthidwa, motere:

1. Onjezani utomoni wa LDPE, antistatic agent, ndi carbon black mu chosakanizira cha liwiro lalikulu, sakanizani ndikusakaniza mofanana, kenako gwiritsani ntchito extruder kuti mutulutse ndi kuyika granulate. Kutentha kwa mbiya ya extruder ndi 150~160℃, ndipo liwiro lalikulu la injini ndi 600~800 r/min. Mutha kupeza zipangizo za PE zokhala ndi voliyumu resistivity ≤10²Ω.cm, surface resistivity ≤10³Ω, Vicat softening point >81℃, ndi antistatic properties.

2. Onjezani utomoni wa HDPE, antistatic agent, mafuta oyera, ndi colorant mu chosakanizira chachangu, sakanizani ndikusakaniza kuti njira yokonzekera ikhale yofanana, kenako gwiritsani ntchito chotulutsira kuti mutulutse ndi kuyika granulate. Mukadula, kuumitsa ndi kuyesa chitsanzocho, mphamvu ya voliyumu ndi ≤10²Ω·cm, mphamvu yogwira ndi 23MPa, mphamvu yong'ambika ndi 20MPa, ndipo ili ndi mphamvu yozimitsa yokha ndipo si yosavuta kugwira moto.

3. Ikani utomoni wa HDPE (100), chlorinated polyethylene elastomer (CPE) (10-20), conductive carbon black (15-20) ndi zina zowonjezera zokwanira pa kutentha kwa pafupifupi 155C, ndipo sinthani mtunda wa roller kufika pa 1mm. , onjezerani HDPE, CPE, carbon black ndi zina zowonjezera motsatizana, sakanizani kwa mphindi 8 mpaka 10, sakanizani mofanana, gwiritsani ntchito 0.5mm roller pitch kuti mudutse katatu kuti mutulutse mapiritsi, muziziritse ndikuphwanya, kenako gwiritsani ntchito extruder kuti mutulutse ndi kuyika granulate.

Zipangizo za PE zokhala ndi mphamvu zabwino zotsutsana ndi static komanso mphamvu zabwino kwambiri zakuthupi ndi zamakaniko zingapezeke. Pamene kuchuluka kwa carbon wakuda woyendetsa mpweya kuli koposa magawo 20, mphamvu yolimbana ndi pamwamba pa chipangizocho sisintha kwenikweni, koma mphamvu yake yokhudza ndi kutalika kwake pakusweka kumachepa kwambiri.

Kuwonjezera kwa chlorinated polyethylene elastomer sikungochepetsa kuchuluka kwa kaboni wakuda, komanso kumapangitsa kuti zinthu zophatikizika zikhale ndi mphamvu zabwino zotsutsana ndi static (kukana kwa pamwamba kumachepa kufika pafupifupi 1x107Ω) komanso mphamvu zokhuza.

4.HDPE, methylbenzene glycol, DBP, mafuta a soya, triethanolamine, mafuta oyera, ufa wa chimanga, dicumyl peroxide, propylene glycol adipate, onjezerani zinthu zonse zopangira mu chosakanizira champhamvu molingana ndi kuchuluka kwa fomula, ndikusakaniza mofanana. Ikani mu chosakanizira chamkati kuti musakanike pa kutentha kwa 170 ~ 175C ndi liwiro lozungulira la 900 ~ 950r/min. Zinthu zosakanizidwazo zikasakanizidwa mkati zimadulidwa ndi granulator kuti zipeze ma pellets. Ma pellets amaikidwa mu thanki yamadzi kuti azizire, kenako amaumitsidwa pa kutentha kwabwinobwino.

Zitha kupezeka kuti mphamvu yokoka ndi 31~37MPa, kutalika kwake pakupuma ndi 15%~18%, mphamvu yokoka ndi 3.1~4.0kJ/m, mphamvu yokoka ndi 45~49MPa, ndipo mphamvu yokoka ndi 500h yosungira mphamvu yokoka ndi 100%. Zipangizo zokhala ndi mphamvu yotsutsa voliyumu (4.4~4.8)x10^(7)Ω.cm.

4. Sakanizani resin HDPE, modifier butene-ethylene copolymer, conductive agent carbon black, silane coupling agent KH-570, filler CaCO3, dispersant PE wax, lubricant HSt, ndi stabilizer CaSt molingana ndi kuchuluka kwa formula. Dziwani kuti, Filler iyenera kulumikizidwa kaye. Kenako yikani ku internal mixer kuti isakanizidwe mkati. Mukayimwaza kwathunthu, isunthireni ku extruder kuti itulutse ndi kuyika granulation. Mutha kupeza chinthu chokhala ndi surface resistivity ya 10^(8)Ω, voliyumu resistivity (20℃) ya 1x10²Ω·cm, mphamvu yokoka ya 16.5MPa, ndi kutalika kwa 385%.