Tsarin da aka gyara na PE, aiki da aiki

Injin fitar da filastik na PE yana ɗaya daga cikin robobi biyar da aka fi amfani da su. Resin thermoplastic ne da aka yi daga polymerization na ethylene monomer. Ba shi da wari kuma ba shi da guba, yana jin kamar kakin zuma, yana da juriya mai kyau ga yanayin zafi da kwanciyar hankali na sinadarai.

Bugu da ƙari, PE yana da ƙarancin shan ruwa, ba ya narkewa a cikin abubuwan narkewa gabaɗaya a zafin ɗaki, kuma yana da kyakkyawan rufin lantarki. Dangane da hanyar polymerization, nauyin kwayoyin halitta, da tsarin sarkar, an raba shi zuwa polyethylene mai yawan yawa (HDPE), polyethylene mai ƙarancin yawa (LDPE), da polyethylene mai ƙarancin yawa. Polyethylene mai yawan yawa (LLDPE) da polyethylene mai nauyin kwayoyin halitta mai matuƙar girma (UHMWPE).

Saboda yawan amfani da shi, ana amfani da PE sau da yawa bayan an gyara shi, kamar haka:

1. Sai a zuba resin LDPE, maganin hana kumburi, da kuma carbon black a cikin injin hadawa mai saurin gudu, a gauraya a gauraya daidai gwargwado, sannan a yi amfani da na'urar fitar da ruwa don fitar da ruwa da kuma fitar da shi. Zafin ganga mai fitar da ruwa shine 150~160℃, kuma babban saurin injin shine 600~800 r/min. Za ku iya samun kayan PE masu juriyar girma ≤10²Ω.cm, juriyar saman ≤10³Ω, wurin laushi na Vicat >81℃, da kuma kaddarorin hana kumburi.

2. Sai a zuba resin HDPE, maganin hana kumburi, man farin, da kuma mai launi a cikin injin haɗawa mai sauri, a gauraya a gauraya domin tsarin shiryawa ya zama iri ɗaya, sannan a yi amfani da na'urar fitar da ruwa don fitar da shi da kuma fitar da shi. Bayan yankewa, busarwa da gwada samfurin, ƙarfin juriyar ya kai ≤10²Ω·cm, ƙarfin juriyar ya kai 23MPa, ƙarfin tsagewa shine 20MPa, kuma yana da halayen kashe kansa kuma ba shi da sauƙin kamawa da wuta.

3. A sanya resin HDPE (100), polyethylene elastomer mai chlorine (CPE) (10-20), carbon black mai conductive (15-20) da kuma adadin wasu ƙarin abubuwa masu dacewa a zafin jiki na kimanin 155C, sannan a daidaita nisan na'urar zuwa injin niƙa mai buɗewa na 1mm., a ƙara HDPE, CPE, carbon black da ƙari a jere, a gauraya na tsawon mintuna 8 zuwa 10, a gauraya daidai gwargwado, a yi amfani da na'urar jujjuyawa mai girman 0.5mm don wucewa sau uku don fitar da allunan, a sanyaya a niƙa, sannan a yi amfani da na'urar fitarwa don fitar da su da kuma fitar da su.

Ana iya samun kayan PE mai kyawawan kaddarorin hana kumburi da kuma kyawawan halayen jiki da na inji. Idan adadin carbon mai watsawa ya fi sassa 20, juriyar saman kayan ba ta canzawa, amma ƙarfin tasirinsa da tsawaitarsa ​​a lokacin karyewa yana raguwa sosai.

Ƙara sinadarin polyethylene mai sinadarin chlorine ba wai kawai zai iya rage yawan sinadarin carbon ba, har ma zai sa kayan haɗin su sami ingantattun kaddarorin antistatic (ƙarfin juriyar saman ya ragu zuwa kusan 1x107Ω) da kuma tasirin tasirin.

4.HDPE, methylbenzene glycol, DBP, man waken soya, triethanolamine, farin mai, garin masara, dicumyl peroxide, propylene glycol adipate, a zuba kowanne abu mai danko a cikin injin hadawa mai sauri bisa ga yadda aka tsara, sannan a juya daidai gwargwado. A saka shi a cikin injin hadawa na ciki don a murza a zafin jiki na 170 ~ 175C da kuma saurin juyawa na 900 ~ 950r/min. Ana zuba kayan hadin bayan an hada na ciki da wani injin hadawa don samun kwali. Ana sanya kwali a cikin tankin ruwa don ya huce, sannan a busar da shi a yanayin zafi na yau da kullun.

Ana iya samun ƙarfin juriya shine 31~37MPa, tsawaitawa a lokacin karyewa shine 15% ~18%, aikin ƙarfin tasiri shine 3.1~4.0kJ/m, ƙarfin lanƙwasa shine 45~49MPa, kuma ƙimar riƙe ƙarfin tasirin ɗaukar hoto na awanni 500 shine 100%. Kayan da ke da juriyar girma (4.4~4.8)x10^(7)Ω.cm.

4. A haɗa resin HDPE, mai gyara butene-ethylene copolymer, mai sarrafa carbon black, silane coupling agent KH-570, filler CaCO3, dispersant PE kakin zuma, man shafawa HSt, da stabilizer CaSt bisa ga ma'aunin dabarar. Lura, Dole ne a haɗa filler ɗin da farko. Sannan a ƙara shi a cikin mahaɗin ciki don haɗawa na ciki. Bayan an wargaza shi gaba ɗaya, a mayar da shi zuwa ga extruder don extrusion da granulation. Za ku iya samun abu mai juriyar saman 10^(8)Ω, juriyar girma (20℃) na 1x10²Ω·cm, ƙarfin tensile na 16.5MPa, da tsawaitawa na 385%.