Njengowona mthombo uphambili weemaski, ilaphu elinyibilikisiweyo lisanda kubiza kakhulu e-China, lifikelela phezulu njengamafu. Ixabiso lemarike ye-polypropylene ephezulu ye-melt index (PP), imathiriyeli ekrwada yamalaphu anyibilikayo, iye yanyuka kakhulu, kwaye ishishini lasekhaya lepetrochemical liye lavusa amaza oguqulo kwi-high melt index polypropylene materials.
Ngendlela, kufuneka kuqatshelwe ukuba izinto zokwenyani ze-meltblown ziyakwazi ukubola. I-2040 eqhelekileyo esetyenziswa kwimarike yinto nje eqhelekileyo yePP, kunye nezixhobo zokwenyani zePP ezinyibilikayo zilungisiwe zonke. Okwangoku, koomatshini abancinci (ii-extruders ezilungisiweyo) kwimarike, ukusebenzisa izinto ezinyibilikayo ezinyibilikayo eziphezulu azizinzileyo. Okukhona umatshini mkhulu, isiphumo esingcono sokusebenzisa ixabiso eliphezulu lokunyibilika kwezinto zePP ezinyibilikayo. Iingxaki ezisemgangathweni zoomatshini abancinci ngokwabo zibalela inxalenye enkulu yezizathu. Ilaphu le-meltblown eliqhelekileyo lifuna ukusetyenziswa kwe-1500 inyibilika umnwe wezinto ezikhethekileyo ezinyibilikayo, kunye nokongezwa kwe-polar masterbatch kunye nonyango lwenkqubo ye-polar ukuphucula ngakumbi ukusebenza kakuhle kokucoca.
Namhlanje, umhleli uye waqulunqa inqaku malunga neempawu zokusebenza zokuguqulwaIzinto zePP ezinyibilikayo, ngethemba lokuba luncedo kumntu wonke. Ukuba ufuna ukuvelisa amalaphu anyibilikisiweyo adibana nemigangatho yesizwe i-KN90, KN95, kunye ne-KN99, kufuneka ube nokuqonda kuyo yonke inkqubo yemveliso, uchonge inkqubo eshiyiweyo, kwaye uzenzele. Okokuqala, makhe siqale ngezinto ezinyibilikayo ekrwada.
Indawo yokunyibilika ephezulu ibhekisa kwisixhobo sePP esinyibilikayo
Iimaski zokuvelisa azinakwenza ngaphandle kwelaphu le-spunbond kunye nelaphu elinyibilikayo, zombini ezi zizixhobo eziphezulu zePP zokunyibilika emva kokuthotywa. Ukuphakama kwesalathiso se-PP esinyibilikayo esisetyenziselwa ukwenza ilaphu elinyibilikayo, kokukhona iintsinga zivuthelwe ngaphandle, kwaye kokukhona ukusebenza ngcono kohluzo lwelaphu elinyibilikayo elinesiphumo. I-PP enobunzima obuphantsi bemolekyuli kunye nokusabalalisa ubunzima be-molecular kulula ukuvelisa iifibers kunye nokufana okulungileyo.
Izinto ezikrwada zokuvelisa i-S-layer (ilaphu le-spunbond) yeemaski ubukhulu becala yi-PP enesalathisi esinyibilikayo phakathi kwe-35-40, ngelixa izinto zokuvelisa i-M-layer (i-meltblown grade) i-meltblown grade PP enesalathisi esiphezulu se-melt (1500). Ukuveliswa kwezi ntlobo zimbini zenqanaba eliphezulu lokunyibilika kwePP alikwazi ukwahlulwa kwizinto eziphambili eziluhlaza, okuyi-organic peroxide degradation agent.
Ngenxa yesalathiso sokunyibilika esisezantsi ngokubanzi sePP eqhelekileyo, ukuhamba kwayo kwimeko enyibilikileyo kubi, nto leyo ethintela ukusetyenziswa kwayo kwimimandla ethile. Ngokungongeza i-peroxides ye-organic ukuguqula i-polypropylene, i-melt index ye-PP inokunyuswa, ubunzima bayo be-molecular bungancitshiswa, kwaye ukusabalalisa ubunzima be-molecular ye-PP kunokuncitshiswa, okubangelwa ukuhamba kakuhle kunye nezinga eliphezulu lokudweba. Ke ngoko, iPP ehlengahlengisiweyo kukuthotywa kweperoxide ye-organic inokusetyenziswa ngokubanzi ekubumbeni inaliti enodonga olucekethekileyo kunye nemimandla yelaphu engalukwanga.
Iiarhente ezininzi zokuthoba iperoxide
Iiperoxide zeOrganic ziikhemikhali eziyingozi zoMgangatho 5.2 ezineemfuno ezingqongqo kakhulu zokuvelisa, ukugcinwa, ukuthuthwa, kunye nokusetyenziswa. Okwangoku, kukho iiperoxide ezimbalwa zeorganic ezisetyenziselwa ukuthotywa kwePP eTshayina. Nazi ezimbalwa:
I-peroxide ye-butyl (DTBP)
Iimpawu zayo eziphambili zezi zilandelayo:
Ayivunywanga yi-FDA ukuba yongezwe kwi-PP, ayikhuthazwa ukuveliswa kwebakala lokutya kunye neemveliso zebakala lococeko.
Indawo edanyazayo yi-6 ℃ kuphela, kwaye inovelwano olugqithisileyo kumbane omileyo. I-0.1MJ yamandla yanele ukutshisa umphunga wayo, okwenza kube lula ukukhanya kunye nokuqhuma kwiqondo lokushisa; Nokuba inokhuseleko lwenitrogen, isengadanyaza kwaye iqhume kwindawo engaphezulu kwama-55 ℃.
I-coefficient conductivity iphantsi kakhulu, okwenza kube lula ukuqokelela iintlawulo ngexesha lenkqubo yokuhamba.
I-DTBP yahlelwa yi-Arhente yeMichiza yaseYurophu (ECHA) kwi-2010 njengeNqanaba le-3 lokubangela ukuguqulwa kwemfuza yemfuza kwaye ayinakucetyiswa ukuba isetyenziswe njengesongezo ekudibaneni kokutya kunye nokunxibelelana ngokuthe ngqo neemveliso zabantu, njengoko kukho umngcipheko omkhulu wokubangela i-biotoxicity.
I-2,5-dimethyl-2,5-bis (tert butylperoxy) i-hexane (ebizwa ngokuba yi-“101″)
Le arhente yokuthotywa yenye yeeperoxides zakuqala ezazisetyenziswa kwintsimi yokuthotywa kwePP. Ngenxa yoluhlu olufanelekileyo lobushushu kunye nomxholo ophezulu weentlobo ze-oksijini ezisebenzayo, kunye nokuvunywa kwayo kwe-FDA e-United States kunye nokuvunywa kwe-BfR eYurophu, iseyi-agent esetyenziswa ngokubanzi kule ndawo. Ngenxa yomxholo ophezulu wee-compounds eziguquguqukayo kwiimveliso zayo zokubola, eziziintlobo ezininzi ezixubileyo kunye nevumba elibukhali elibukhali, umphumo ophezulu wokunyibilika kwePP unencasa enamandla. Ngokukodwa kwizinto ezinyibilikayo ezisetyenziswa kwimveliso yemaski, ukongezwa kwezixa ezikhulu zeearhente zokuthomalalisa kunokubangela iingxaki ezibalulekileyo zevumba lamalaphu asezantsi anyibilikayo.
3,6,9-Triethyl-3,6,9-Trimethyl-1,4,7-Triperoxynonane (ebizwa ngokuba yi "301")
Xa kuthelekiswa nezinye ii-arhente zokuthotywa, i-301 inokusebenza okugqwesileyo kokhuseleko kunye nokusebenza kakuhle kokuthotywa, kunye nevumba eliphantsi kakhulu, nto leyo eyenza ibe yenye yezinto ezikhethwayo zokuthoba isidima sePP. Iinzuzo zayo zezi zilandelayo:
● Ekhuselekileyo
Ubushushu bokuzibolisa obuzinyusayo buyi-110 ℃, kwaye i-flash point nayo iphezulu njenge-74 ℃, enokuthi ithintele ngokufanelekileyo ukubola kunye ne-flash ignition ye-arhente yokunciphisa ngexesha lenkqubo yokutya. Yeyona mveliso ikhuselekileyo yeperoxide phakathi kweearhente ezaziwayo zokuthomalalisa.
● Isebenza kakuhle
Ngenxa yobukho beebhondi ezintathu zeperoxide kwimolekyuli, ukongezwa komlinganiselo ofanayo weentlobo zeoksijini esebenzayo kunokubonelela ngeeradicals zamahhala, ngokufanelekileyo kuphuculwe ukuthotywa kokuthotywa.
Ivumba eliphantsi
Xa kuthelekiswa ne "Double 25", iikhompawundi eziguquguqukayo eziveliswa ngokubola kwayo zisinye kwishumi kuphela kwezinye iimveliso, kwaye iintlobo zeekhompawundi eziguquguqukayo ziyi-esters ezivumba liphantsi, ngaphandle kokucaphukisa iikhompawundi eziguquguqukayo. Ke ngoko, inokunciphisa kakhulu ivumba lemveliso, enceda ekuphuhliseni iimarike eziphezulu kunye nexabiso elithe kratya leemveliso ezinokonyusa ivumba eliphantsi kunye nokunyusa ivumba elibi. umngcipheko wokuthotywa kweemveliso zePP ngexesha lokugcinwa kunye nokuthutha, ngaloo ndlela kuphuculwe ngokufanelekileyo ukhuseleko.
Nangona i-DTBP ingasacetyiswa njenge-arhente yokuthotywa kwe-PP eguquliweyo, kusekho abavelisi abathile basekhaya abasebenzisa i-DTBP njenge-arhente yokunciphisa ukuvelisa i-high melt index PP, ebeka imingcipheko emininzi yokhuseleko kwinkqubo yokuvelisa kunye neendawo zokusetyenziswa ezilandelayo. Iimveliso ezibangelwayo nazo zineengxaki ezinzulu zevumba, kwaye kukho umngcipheko omkhulu wokukhatywa okanye ukungaphumeleli kuvavanyo xa zithunyelwa kumazwe angaphandle.
Dongguan Liansheng Non woven Technology Co., Ltd.yasekwa ngoMeyi 2020. Lishishini elikhulu lemveliso yelaphu elingalukiweyo elidibanisa uphando nophuhliso, imveliso, kunye neentengiso. Inokuvelisa imibala eyahlukeneyo ye-PP spunbond amalaphu angalukwanga kunye nobubanzi obungaphantsi kwe-3.2 yeemitha ukusuka kwi-9 grams ukuya kwi-300 grams.
Ixesha lokuposa: Nov-09-2024