PE hloov kho cov mis, kev ua haujlwm thiab kev ua tau zoo

PE yas extrusion tshuab yog ib qho ntawm tsib hom yas uas siv ntau tshaj plaws. Nws yog cov thermoplastic resin ua los ntawm kev sib xyaw ntawm ethylene monomer. Nws tsis muaj ntxhiab thiab tsis muaj tshuaj lom, zoo li quav ciab, tiv taus kub thiab tshuaj lom neeg zoo.

Ntxiv rau, PE muaj dej tsawg, tsis yaj hauv cov kuab tshuaj dav dav ntawm chav tsev kub, thiab muaj hluav taws xob rwb thaiv tsev zoo heev. Nyob ntawm txoj kev polymerization, qhov hnyav molecular, thiab cov qauv saw, nws muab faib ua polyethylene siab (HDPE), polyethylene qis (LDPE), thiab polyethylene qis linear. Density polyethylene (LLDPE) thiab ultra-high molecular weight polyethylene (UHMWPE).

Vim nws daim ntawv thov dav, PE feem ntau siv tom qab hloov kho, raws li hauv qab no:

1. Ntxiv LDPE resin, antistatic agent, thiab carbon black rau hauv lub tshuab sib tov ceev ceev, sib tov thiab do kom sib npaug, thiab tom qab ntawd siv lub extruder los extrude thiab granulate. Lub extruder barrel kub yog 150 ~ 160 ℃, thiab lub cav ceev yog 600 ~ 800 r / min. Koj tuaj yeem tau txais cov ntaub ntawv PE nrog ntim resistivity ≤10²Ω.cm, surface resistivity ≤10³Ω, Vicat softening point > 81 ℃, thiab antistatic zog.

2. Ntxiv HDPE resin, antistatic agent, white oil, thiab colorant rau hauv lub tshuab sib tov ceev ceev, sib tov thiab do kom ua rau cov txheej txheem npaj sib xws, thiab tom qab ntawd siv lub extruder los extrude thiab granulate. Tom qab txiav, ziab thiab sim cov qauv, qhov ntim resistivity yog ≤10²Ω·cm, lub zog tensile yog 23MPa, lub zog tear yog 20MPa, thiab nws muaj cov yam ntxwv ntawm kev tua tus kheej thiab tsis yooj yim rau hluav taws.

3. Muab cov resin HDPE (100), chlorinated polyethylene elastomer (CPE) (10-20), conductive carbon black (15-20) thiab cov nqi tsim nyog ntawm lwm cov khoom ntxiv rau ntawm qhov kub ntawm kwv yees li 155C, thiab kho qhov nrug ntawm lub roller mus rau lub zeb qhib ntawm 1 hli. , ntxiv HDPE, CPE, carbon black thiab cov khoom ntxiv rau hauv ib qho kev sib law liag, sib tov rau 8 txog 10 feeb, sib tov kom sib npaug, siv lub suab 0.5 hli roller kom dhau peb zaug kom tso cov ntsiav tshuaj tawm, txias thiab zom, thiab tom qab ntawd siv lub extruder los extrude thiab granulate.

Ib yam khoom PE uas muaj cov khoom zoo antistatic thiab cov khoom siv lub cev thiab cov khoom siv kho tshuab zoo heev tuaj yeem tau txais. Thaum cov pa roj carbon dub conductive ntau dua 20 qhov, qhov resistivity ntawm cov khoom yuav luag tsis hloov pauv, tab sis nws lub zog cuam tshuam thiab elongation thaum tawg txo qis heev.

Qhov ntxiv ntawm chlorinated polyethylene elastomer tsis tsuas yog txo cov pa roj carbon dub xwb, tab sis kuj ua rau cov khoom sib xyaw muaj cov khoom tiv thaiv zoo dua (qhov tsis kam ntawm qhov chaw raug txo kom txog li 1x107Ω) thiab cov khoom cuam tshuam.

4. HDPE, methylbenzene glycol, DBP, roj taum pauv, triethanolamine, roj dawb, hmoov pob kws, dicumyl peroxide, propylene glycol adipate, ntxiv txhua yam khoom siv raw rau hauv lub tshuab sib tov ceev ceev raws li cov mis sib piv, thiab do kom sib npaug. Muab tso rau hauv lub tshuab sib tov sab hauv rau kev sib tov ntawm qhov kub ntawm 170 ~ 175C thiab qhov ceev tig ntawm 900 ~ 950r / min. Cov khoom sib tov tom qab sib tov sab hauv yog granulated los ntawm granulator kom tau txais cov pellets. Cov pellets raug muab tso rau hauv lub tank dej kom txias, thiab tom qab ntawd ziab ntawm qhov kub ib txwm.

Nws tuaj yeem tau txais tias lub zog tensile yog 31 ~ 37MPa, qhov elongation thaum tawg yog 15% ~ 18%, qhov cuam tshuam zog ntawm cov khoom siv yog 3.1 ~ 4.0kJ / m, qhov khoov zog yog 45 ~ 49MPa, thiab 500h photoaging cuam tshuam lub zog khaws cia tus nqi yog 100%. Cov ntaub ntawv nrog ntim resistivity (4.4 ~ 4.8) x 10 ^ (7) Ω.cm.

4. Sib tov cov resin HDPE, modifier butene-ethylene copolymer, conductive agent carbon black, silane coupling agent KH-570, filler CaCO3, dispersant PE wax, lubricant HSt, thiab stabilizer CaSt raws li cov qauv mis. Nco ntsoov, Lub filler yuav tsum tau txuas ua ntej. Tom qab ntawd ntxiv rau hauv lub tshuab sib tov sab hauv rau kev sib tov sab hauv. Tom qab tau dispersed tag nrho, hloov mus rau extruder rau extrusion thiab granulation. Koj tuaj yeem tau txais cov khoom siv nrog qhov resistivity ntawm 10^(8)Ω, qhov ntim resistivity (20℃) ntawm 1x10²Ω·cm, lub zog tensile ntawm 16.5MPa, thiab elongation ntawm 385%.