Seyakanyanya kubikwa yemasiki, jira rakanyunguduka rave kuwedzera kudhura muChina, richisvika pakakwirira semakore. Mutengo wemusika weiyo yakakwira melt index polypropylene (PP), iyo mbishi yemachira akanyunguduka, yakwirawo mudenga, uye indasitiri yepetrochemical yemumba yakamutsa mafungu eshanduko kune yakakwira melt index polypropylene zvinhu.
Nenzira, zvinofanirwa kucherechedzwa kuti chaiyo yakanyunguduka zvinhu zviri biodegradable. Iyo inowanzoshandiswa 2040 mumusika ingori zvakajairika PP zvinhu, uye chaiyo PP meltblown zvinhu zvese zvakagadziridzwa. Parizvino, kumakina madiki (akagadziridzwa extruders) pamusika, kushandisa yakakwira fluidity meltblown zvinhu haina kugadzikana. Iyo yakakura muchina, zviri nani mhedzisiro yekushandisa yakakwira kunyungudika kukosha yakanyungudika PP zvinhu. Matambudziko emhando yemakina madiki pachawo anoverengera chikamu chikuru chezvikonzero. Chigadzirwa chenguva dzose chinonyunguduka chinoda kushandiswa kwe1500 melt finger special meltblown material, pamwe nekuwedzera kwepolar masterbatch uye polar process treatment kuti uwedzere kunatsiridza kusefa.
Nhasi, mupepeti akagadzira chinyorwa nezve maitiro ekuita kweakagadziridzwaPP meltblown zvinhu, tichitarisira kubatsira munhu wose. Kana iwe uchida kugadzira machira akanyunguduka anosangana nemiyero yenyika KN90, KN95, uye KN99, iwe unofanirwa kuve nekunzwisisa kwese maitiro ekugadzira, tsvaga maitiro akasiiwa, uye wozvigadzirira. Chekutanga, ngatitangei nekunyunguduka kwakapepereswa zvinhu mbishi.
High melting point inoreva kunyunguduka kwakaputika giredhi PP zvinhu
Kugadzira masks hakugone kuita pasina spunbond jira uye meltblown jira, ese ari akakwira kunyungudika PP zvinhu mushure mekuora. Iyo yakakwirira iyo yakanyunguduka index yePP inoshandiswa kugadzira jira rakanyunguduka, kukwenenzvera kwefiber kufefeterwa kunze, uye zvirinani kusefa kwechigadzirwa chakanyunguduka. PP ine yakaderera molecular uremu uye nhete mamorekuru uremu kugovera kuri nyore kugadzira mafiibhi ane yunifomu yakanaka.
Iyo mbishi yekugadzira S-layer (spunbond jira) yemasiki inonyanya kunyungudika index PP ine melt index pakati pe35-40, nepo zvinhu zvekugadzira M-layer (meltblown jira) yakanyungudika giredhi PP ine yakakwira melt index (1500). Kugadzirwa kweaya marudzi maviri eyakanyanya kunyungudika nzvimbo PP haigone kupatsanurwa kubva kune yakakosha zvinhu, inova organic peroxide degradation agent.
Nekuda kweiyo yakajairika yakaderera melt index yeyakajairika PP, kuyerera kwayo munzvimbo yakanyungudutswa kwakashata, iyo inomisa kushandiswa kwayo mune mamwe minda. Nekuwedzera organic peroxides kushandura polypropylene, iyo yakanyunguduka index yePP inogona kuwedzerwa, huremu hwayo hwemamorekuru hunogona kudzikiswa, uye huremu hwemamorekuru hwePP hunogona kudzikiswa, zvichikonzera kuyerera kuri nani uye chiyero chepamusoro chekudhirowa. Naizvozvo, PP yakagadziridzwa ne organic peroxide degradation inogona kushandiswa zvakanyanya mutete-walled jekiseni kuumba uye isina-yakarukwa machira eminda.
Mazhinji peroxide degrading agents
Organic peroxides Kirasi 5.2 makemikari ane njodzi ane zvakanyanya kusimba zvinodiwa pakugadzira, kuchengetedza, kutakura, uye kushandisa. Parizvino, kune mashoma organic peroxides anonyanya kushandiswa kushatisa PP muChina. Heano mashoma:
Di tert butyl peroxide (DTBP)
Hunhu hwayo hukuru ndeiyi:
Haina kutenderwa neFDA kuti iwedzere muPP, isingakurudzirwe kugadzirwa kwegiredhi rekudya uye hutsanana giredhi zvigadzirwa.
Iyo flash point ingori 6 ℃, uye inonyanya kunzwa kune static magetsi. 0.1MJ yesimba inokwana kupisa mhute yayo, zvichiita kuti zvive nyore kupenya uye kuputika pakupisa kwekamuri; Kunyangwe nekuchengetedzwa kwenitrogen, inogona kuramba ichipenya uye kuputika munzvimbo dziri pamusoro pe55 ℃.
Iyo conductivity coefficient yakaderera zvakanyanya, zvichiita kuti zvive nyore kuunganidza machaji panguva yekuyerera.
DTBP yakarongedzerwa neEuropean Chemicals Agency (ECHA) muna 2010 seChikamu 3 inducing gene mutation substance uye haigone kukurudzirwa kuti ishandiswe sechinhu chinowedzera mukubata chikafu uye kubata zvakanangana nezvigadzirwa zvevanhu, sezvo paine njodzi huru yekukonzera biotoxicity.
2,5-dimethyl-2,5-bis (tert butylperoxy) hexane (inonzi "101″)
Uyu mumiririri wekusvibisa ndeimwe yepakutanga peroksidi yakashandiswa mumunda wekuora kwePP. Nekuda kweiyo yakakodzera tembiricha yemhando uye yakakwira yemhando yeokisijeni inoshanda, pamwe nemvumo yayo yeFDA muUnited States uye kubvumidzwa kweBfR muEurope, ichiri kushandiswa zvakanyanya kusvibisa mundima iyi. Pamusana pehuwandu hwehuwandu hwehuwandu hwemagetsi muzvigadzirwa zvayo zvekuparara, izvo zvinonyanya kusvibiswa nemafuta ane kunhuhwirira kwakasimba, iyo inoguma yakakwirira yakanyunguduka PP ine kuravira kwakasimba. Kunyanya kune zvigadzirwa zvinonyunguduka zvinoshandiswa mukugadzira masiki, kuwedzerwa kweakawanda ezvekusvibisa maajenti anogona kukonzera akakosha kunhuwa machira ezasi meltblown machira.
3,6,9-Triethyl-3,6,9-Trimethyl-1,4,7-Triperoxynonane (inonzi "301″)
Kana ichienzaniswa nemamwe maajenti ekushatisa, 301 ine yakanakisa kuchengetedzwa kwekuita uye kudzikisira kunyatsoita, pamwe nekunhuhwirira kwakaderera, zvichiita kuti ive imwe yesarudzo dzakasarudzika dzekudzikisira PP. Zvayakanakira ndezvizvi:
● Yakachengeteka
Iyo yekuzvimisikidza yekuora tembiricha ndeye 110 ℃, uye iyo flash point zvakare yakakwira se74 ℃, iyo inogona kunyatso kudzivirira kuparara uye kupenya kubatidza kweiyo degradation agent panguva yekudyisa. Ndiyo yakachengeteka peroxide chigadzirwa pakati pevanozivikanwa degradation agents.
● Anoshanda zvakanyanya
Nekuda kwekuvapo kwezvisungo zvitatu zveperoxide mumorekuru, kuwedzera kwechikamu chakafanana cheanoshanda okisijeni marudzi anogona kupa mamwe mahara radicals, zvinobudirira kuvandudza kuderera kwekuita.
Kunhuhwirira kwakaderera
Kuenzaniswa ne "Double 25", iyo inoputika yemakemikari inogadzirwa nekuparara kwayo inongova chikamu chimwe chete chegumi chezvimwe zvigadzirwa, uye mhando dzemakomisheni anoputika anonyanya kunhuhwirira esters, pasina anoshatisa macommunication. njodzi yekusvibisa PP zvigadzirwa panguva yekuchengetedza uye yekufambisa, nekudaro zvinobudirira kuvandudza kuchengetedzwa.
Kunyangwe hazvo DTBP isingachakurudzirwe semumiriri wekushatisa wePP yakagadziridzwa, kuchine vamwe vagadziri vepamba vanoshandisa DTBP sechinhu chinoshatisa kugadzira yakakwira melt index PP, iyo inoisa njodzi dzakawanda dzekuchengetedza mukugadzira uye nzvimbo dzinotevera dzekushandisa. Zvigadzirwa zvinobuda zvinewo matambudziko akanyanya ekunhuwa, uye pane njodzi huru yekurambwa kana kutadza kupasa bvunzo kana yatumirwa kumusika wepasirese.
Dongguan Liansheng Non woven Technology Co., Ltd.yakavambwa muna Chivabvu 2020. Ibhizimusi rekugadzira jira rakakura risingarukwe rinobatanidza tsvakiridzo nekusimudzira, kugadzira, uye kutengesa. Inogona kuburitsa mavara akasiyana-siyana ePP spunbond machira asiri akarukwa ane hupamhi husingasviki 3.2 metres kubva pa9 gramu kusvika 300 magiramu.
Nguva yekutumira: Nov-09-2024