Imfuno yemarike yendawo ephezulu yokunyibilika kwePP
Ukusebenza kokunyibilika kwe-polypropylene kuhambelana ngokusondeleyo nobunzima bayo bemolekyuli. I-avareji yobunzima bemolekyuli ye-polypropylene resin yorhwebo elungiselelwe yi-Ziegler Natta catalytic system eqhelekileyo iphakathi kwe-3 × 105 kunye ne-7 × 105. Isalathisi sokunyibilika kwezi ziqhelekileyoiintlazi ze-polypropyleneiphantsi jikelele, nto leyo enqanda uluhlu lwesicelo sabo.
Ngophuhliso olukhawulezayo lweshishini lefayibha yeekhemikhali kunye neshishini loomatshini belaphu, ishishini lelaphu elingalukwanga linyuke ngokukhawuleza. Uluhlu lweenzuzo zepolypropylene zenza ukuba ibe yinto ekhethiweyo ekrwada kwiilaphu ezingalukwanga. Ngophuhliso loluntu, imimandla yokusetyenziswa kweendwangu ezingalukiweyo ziba zibanzi. Kwinkalo yezonyango kunye nempilo, amalaphu angalukwanga angasetyenziselwa ukwenza iisuti zodwa, iimaski, iigawuni zotyando, i-napkins yabasetyhini, i-diapers yabantwana, njalo njalo; Njengesakhiwo kunye nemathiriyeli ye-geotechnical, amalaphu angalukwanga angasetyenziselwa ukuthintela amanzi kuphahla, ukwakhiwa kwendlela, ubunjineli bogcino lwamanzi, okanye uphahla oluphezulu oluvakalisiweyo lunokuveliswa kusetyenziswa i-spunbond kunye nenaliti ehlatyiweyo yetekhnoloji ehlanganisiweyo. Ubomi bayo benkonzo ngamaxesha angama-5-10 ubude kune-asphalt yendabuko evakalelwa; Izinto zokucoca zikwayenye yezona mveliso ziphuhlayo ngokukhawuleza zamalaphu angalukwanga, angasetyenziselwa ukuhluza igesi kunye nolwelo kumashishini afana neekhemikhali ezomileyo, amayeza kunye nokutya, kwaye anamandla amakhulu entengiso; Ukongeza, amalaphu angalukwanga angasetyenziselwa ukwenziwa kwesikhumba, imithwalo, amalaphu eempahla, amalaphu okuhombisa, kunye namalaphu okusula asetyenziswa ekhaya.
Kungenxa kanye ngenxa yophuhliso oluqhubekayo lweamalaphu angalukwangaukuba iimfuno zemveliso kunye nesicelo sabo zikhula rhoqo, ezifana ne-melt blown, imveliso yesantya esiphezulu, iimveliso ezibhityileyo, njl. Ngoko ke, iimfuno zokusetyenzwa kwe-polypropylene resin, eyona nto iphambili yempahla ekrwada yamalaphu angalukiweyo, nayo iye yanda ngokuhambelanayo; Ukongezelela, ukuveliswa kwe-speed-speed spinning okanye i-fine denier polypropylene fibers nayo ifuna i-polypropylene resin ukuba ibe nokusebenza kakuhle kwe-melt flow; Ezinye ii-pigments ezingakwaziyo ukumelana namaqondo obushushu aphezulu zifuna i-polypropylene njengesithwali esineqondo lobushushu eliphantsi. Zonke ezi zifuna ukusetyenziswa kwe-ultra-high melt index polypropylene resin njengento eluhlaza enokuthi iqhutywe kumaqondo aphantsi.
Isixhobo esikhethekileyo se-melt blown i-polypropylene ene-high melt index. Isalathiso sokunyibilika sibhekisa kubunzima bezinto ezityhidiweyo ezidlula kwityhubhu eqhelekileyo ye-capillary rhoqo ngemizuzu eli-10. Xa liphezulu ixabiso, ngcono ukusetyenzwa kwe-fluidity yezinto. Okukhona siphezulu isalathiso sokunyibilika kwepolypropylene, kokukhona imicu yokutshizwa icolekileyo, kwaye kokukhona kusenziwa ngcono ukuhluzwa kwelaphu elivuthelweyo elinyibilikayo elivelisiweyo.
Indlela yokulungiselela isalathisi esiphezulu se-polypropylene resin
Enye kukulawula ubunzima bemolekyuli kunye nokusabalalisa ubunzima bemolekyuli yepolypropylene ngokulawula inkqubo yokuphendula i-polymerization, njengokunciphisa ubunzima bemolekyuli yepolymer ngokunyusa ukuxinana kweearhente ze-cationic ezifana negesi ye-hydrogen, ngaloo ndlela kuphuculwe isalathiso sokunyibilika. Le ndlela inqunyelwe yimiba efana nenkqubo ye-catalytic kunye neemeko zokusabela, okwenza kube nzima ukulawula ukuzinza kwesalathisi sokunyibilika kunye nokuyisebenzisa.
I-Yanshan Petrochemical iye yenza i-polymerizing imathiriyeli evuthelweyo ngokunyibilika ngokuthe ngqo ngesalathiso sokunyibilika esingaphezulu kwe-1000 kusetyenziswa i-metallocene catalysts kule minyaka imbalwa idlulileyo. Ngenxa yobunzima bokulawula ukuzinza, i-polymerization enkulu ayizange iqhutywe. Ukususela ekuqhambukeni kobhubhane kulo nyaka, i-Yanshan Petrochemical iye yamkela ukuthotywa okulawulekayo i-polypropylene inyibilika ivuthelwa iteknoloji yokuvelisa izinto eziphuhliswe ngo-2010 ukuvelisa i-polypropylene inyibilika ivuthelwe ngelaphu elingalukwanga izinto ezikhethekileyo ngoFebruwari 12. Kwangaxeshanye, iimvavanyo zoshishino ziye zaqhutywa kwisixhobo kusetyenziswa i-metallocene catalysts. Imveliso iye yaveliswa kwaye ngoku ithunyelwa kubasebenzisi abasezantsi ukuze bavavanywe.
Enye indlela kukulawula ukuthotywa kwe-polypropylene efunyenwe nge-polymerization eqhelekileyo, ukunciphisa ubunzima bayo be-molecular, kunye nokwandisa isalathisi sayo sokunyibilika.
Ngaphambili, iindlela zokuthotywa kweqondo lokushisa eliphezulu zazisetyenziswa ngokuqhelekileyo ukunciphisa ubunzima be-molecular of polypropylene, kodwa le ndlela yokutshatyalaliswa komatshini wokushisa ophezulu inemiqobo emininzi, njengokulahlekelwa okongeziweyo kunye nokuchithwa kwe-thermal, kunye neenkqubo ezingazinzanga. Ukongezelela, kukho iindlela ezifana nokuchithwa kwe-ultrasonic, kodwa ezi ndlela zihlala zifuna ubukho be-solvents, okwandisa ubunzima kunye neendleko zenkqubo. Kwiminyaka yakutshanje, iindlela zokutshatyalaliswa kweekhemikhali ze-polypropylene ziye zasetyenziswa ngokubanzi.
Ukuveliswa kwe-High Melt Finger PP ngeNdlela yokuNcitshiswa kweMichiza
Indlela yokuthotywa kweekhemikhali ibandakanya ukuphendula i-polypropylene kunye nee-agent zokutshatyalaliswa kweekhemikhali ezifana ne-peroxides ye-organic kwi-screw extruder, ebangela ukuba ikhonkco lemolekyuli ye-polypropylene yaphuke kwaye inciphise ubunzima bayo bemolekyuli. Xa kuthelekiswa nezinye iindlela zokuthotywa, ineengenelo zokuthotywa ngokupheleleyo, ukunyibilika okulungileyo kokunyibilika, inkqubo elula nenokwenzeka yokulungiselela, kwaye kulula ukuyiqhuba imveliso yemizi-mveliso emikhulu. Le yeyona ndlela isetyenziswa ngokuqhelekileyo ngabavelisi beplastiki abalungisiweyo.
Iimfuno zezixhobo
Iqondo eliphezulu lokunyibilika lihluke ngokupheleleyo kwizixhobo eziqhelekileyo zokuguqulwa kwePP. Izixhobo zokutshiza izinto ezityhidiweyo zifuna umlinganiso omde, kwaye intloko yomatshini kufuneka iphakame okanye isebenzise i-granulation engaphantsi kwamanzi (i-Wuxi Huachen inomlinganiselo ofanayo ongaphantsi kwamanzi); Izinto eziphathekayo zincinci kwaye zifuna ukudibana namanzi ngokukhawuleza emva kokuphuma kwintloko yomatshini ukupholisa lula;
Ukuveliswa kwe-polypropylene eqhelekileyo, isantya sokusika i-extruder simitha engama-70 ngomzuzu, ngelixa i-polypropylene ephezulu ye-melt, isantya sokusika sifuneka sibe ngaphezu kweemitha ezili-120 ngomzuzu. Ukongezelela, ngenxa yesantya sokuhamba ngokukhawuleza kwe-polypropylene ephezulu, umgama wokupholisa kufuneka unyuswe ukusuka kwiimitha ezi-4 ukuya kwi-12 yeemitha.
Umatshini wokwenza izinto ezinyibilikayo ezinyibilikayo ufuna i-mesh eqhubekayo yokutshintsha, ngokuqhelekileyo usebenzisa umtshini we-mesh station ezimbini. Iimfuno zamandla eenjini ziphezulu kakhulu, kwaye iibhloko zokucheba ezingaphezulu ziya kusetyenziswa ngaphakathi kumalungu esikrufu; Ngokuka-Koyapan, i-twin screw line eyenziwe ngezixhobo ezikhethekileyo ezinyibilikayo inomkhethe obonakalayo.
1. Ukuqinisekisa ukondla okuzinzile (PP, DCP, njl.);
2. Ukugqiba i-aspect ratio efanelekileyo kunye ne-axial position yokuvula ngokusekelwe kwi-half-life of the composite formula (iguquke kwisizukulwana sesithathu ukuze kuqinisekiswe i-extrusion egudileyo ye-CR-PP reaction);
3. Ukuqinisekisa ukuba umnwe onyibilikayo unesivuno esiphezulu ngaphakathi kwinqanaba lokunyamezela (ngaphezu kwama-30 ama-strips agqityiweyo aneendleko eziphezulu kunye nesiseko sokuxuba xa kuthelekiswa neshumi elinesibini kuphela);
4. Iintloko zokubumba ezikhethekileyo zokuhambisa amanzi kufuneka zixhotyiswe. Ukunyibilika kunye nokufudumeza kufuneka kufane, kwaye inani lenkunkuma kufuneka libe lincinci;
5. Kukhethwa ukuba kufakwe i-granulator yokusika epholileyo evuthiweyo kwizinto ezincibilikayo ezincibilikayo (ezinegama elihle kwishishini) ukuqinisekisa umgangatho weengqungquthela ezigqityiweyo kunye nezinga eliphezulu;
6. Kuya kuba ngcono ngakumbi ukuba kukho ingxelo yovavanyo lwe-intanethi. Ukongeza, ukongezwa kwabaqalisi bokuthotywa kolwelo kwifidi yecala kufuna ukuchaneka okuphezulu ngenxa yenxalenye encinci yezongezo. Kwizixhobo zokutya ezisecaleni, ezifana neBrabenda, i-Kubota, i-Matsunai eveliswa ekhaya, njl.
Izixhobo ezisetyenziswayo ngoku zokuthotywa kwesidima
1: I-Dit-butyl peroxide, ekwaziwa ngokuba yi-di-tert-butyl peroxide, initiator a, vulcanizing agent dTBP, lulwelo olungenambala ukuya kumthubi kancinane olubonakeleyo olunganyibilikiyo emanzini kwaye luxubene nezinyibilikisi eziphilayo ezifana ne-benzene, toluene, kunye ne-acetone. I-oxidizing eyomeleleyo, inokutsha, izinzile kwiqondo lobushushu begumbi, ayinaluvelwano kwimpembelelo.
I-2: I-sulfurizer ephindwe kabini, efinyeziweyo njenge-DBPH, igama lekhemikhali 2,5-dimethyl-2,5-bis (tert butylperoxy) i-hexane, ubunzima be-molecular 290.44. Ulwelo olumthubi olumthubi olunobunzima obuyi-0.8650 ngokohlobo lwesandi kunye nomgubo omhlophe olubisi. Indawo yomkhenkce ngu 8 ℃. Indawo yokubilisa 50 ~ 52 ℃ (13Pa). Uluhlu lwe-refractive index ukusuka kwi-1.418 ukuya kwi-1.419. I-viscosity yolwelo yi-6.5mPa. s. Indawo edanyazayo (indebe evulekileyo) 58 ℃. Inyibilika kuninzi lwezinyibilikisi zendalo ezifana neealkoholi, ii-ethers, iiketones, ii-esters, iihydrocarbons ezinevumba elimnandi, njl., ezinganyibilikiyo emanzini.
3: Uvavanyo lweminwe edibeneyo
Uvavanyo lwe-melt finger kufuneka luqhutywe ngokuhambelana ne-GBIT 30923-2014 Polypropylene Melt Spray Izinto ezikhethekileyo; Izixhobo eziqhelekileyo zeminwe ezinyibilikayo azinakuvavanywa. Ukunyibilika okuphezulu kubhekisa ekusebenziseni indlela yomthamo kunendlela yobunzima bovavanyo.
Izixhobo zasekhaya ziquka i-Chengde Youte, i-Guangxin Electronic Technology, i-Hangzhou Jinmai, i-Jilin Science kunye ne-Education Instrument Factory, kunye nezixhobo ezithunyelwa kumazwe angaphandle ziquka iZwick; i-Chengde Jinjian Testing Instrument Co., Ltd. ivelisa i-MFL-2322H yokulinganisa isantya sokunyibilika kwemitha eyenzelwe ngokukodwa umlinganiselo we-NVR we-ultra-high iimfuno zokuhamba kwefektri ye-polypropylene ye-GB 309232014 Polypropylene Melt Spray Izinto ezikhethekileyo. Uluhlu lokuvavanya (500-2500) cm / 10min.
Okwangoku, kukho:
1. Shandong Daoen Polymer Materials Co., Ltd
2. Hunan Shengjin New Materials Co., Ltd
3. Jinfa Technology Co., Ltd
4. Beijing Yishitong New Materials Development Co., Ltd
5. I-Shanghai Huahe Composite Materials Co., Ltd
6. Hangzhou Chenda New Materials Co., Ltd
7. Basel, Dalin, South Korea
Ixesha lokuposa: Apr-01-2024