Ha ho bapisoa le lisebelisoa tsa khalase le tšepe, litšobotsi tse ka sehloohong tsa polasetiki ke:
1, litšenyehelo li tlase, li ka sebelisoa hape ntle le ho thibela likokoana-hloko, tse loketseng ho sebelisoa e le thepa e tala bakeng sa tlhahiso ea lisebelisoa tsa bongaka tse lahliloeng;
2, ts'ebetso e bonolo, ts'ebeliso ea polasetiki ea eona e ka sebetsoa ka mefuta e fapaneng ea meaho, 'me ho thata ho etsa tšepe le khalase ka sebopeho se rarahaneng sa lihlahisoa;
3, e thata, e rekere, ha ho bonolo ho robeha joalo ka khalase;
4, e nang le inertness e ntle ea lik'hemik'hale le polokeho ea baeloji.
Melemo ena ea ts'ebetso e etsa hore polasetiki e sebelisoe haholo lisebelisoa tsa bongaka, haholo-holo ho kenyelletsa polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), polycarbonate (PC), ABS, polyurethane, polyamide, thermoplastic elastomers, polysulfone le polyether ether ketone.Ho kopanya ho ka ntlafatsa ts'ebetso ea li-plastiki, e le hore ts'ebetso e ntle ka ho fetisisa ea li-resin tse fapaneng li bonahale, tse kang polycarbonate / ABS, polypropylene / elastomer blending modification.
Ka lebaka la ho kopana le meriana ea metsi kapa ho kopana le 'mele oa motho, litlhoko tsa mantlha tsa polasetiki ea bongaka ke botsitso ba lik'hemik'hale le biosafety.Ka bokhutšoanyane, likarolo tsa lisebelisoa tsa polasetiki li ke ke tsa kenngoa ka har'a moriana oa metsi kapa 'meleng oa motho, li ke ke tsa baka chefo le tšenyo ea lisele le litho,' me ha li na chefo ebile ha li kotsi 'meleng oa motho.E le ho netefatsa biosafety ea li-plastiki tsa bongaka, li-plastiki tsa bongaka tse atisang ho rekisoa 'marakeng li netefalitsoe le ho hlahlojoa ke ba boholong ba tsa bongaka,' me basebelisi ba tsebisoa ka ho hlaka hore na ke limaraka life tseo e leng tsa sehlopha sa bongaka.
Lipolasetiki tsa bongaka United States hangata li fetisa setifikeiti sa FDA le tlhahlobo ea baeloji ea USPVI, 'me lipolasetiki tsa boemo ba bongaka Chaena hangata li lekoa ke Setsi sa Teko sa sesebelisoa sa bongaka sa Shandong.Hajoale, ho ntse ho e-na le palo e kholo ea thepa ea polasetiki ea bongaka naheng eo ntle le kutloisiso e tiileng ea setifikeiti sa biosafety, empa ka ntlafatso ea butle-butle ea melaoana, maemo ana a tla ntlafala le ho feta.
Ho ea ka litlhoko tsa sebopeho le matla a sehlahisoa sa sesebelisoa, re khetha mofuta o nepahetseng oa polasetiki le sehlopha se nepahetseng, ebe re khetha theknoloji ea ho sebetsa ea thepa.Lintho tsena li kenyelletsa ts'ebetso ea ts'ebetso, matla a mochine, litšenyehelo tsa tšebeliso, mokhoa oa kopano, sterilization, joalo-joalo Thepa ea ho sebetsa le thepa ea 'mele le ea lik'hemik'hale ea lipolasetiki tsa bongaka tse ngata tse sebelisoang hangata li hlahisoa.
Li-plastiki tse supileng tse sebelisoang ka tloaelo tsa bongaka
1. Polyvinyl chloride (PVC)
PVC ke e 'ngoe ea mefuta ea polasetiki e hlahisang litholoana ka ho fetisisa lefatšeng.Resin ea PVC ke phofo e tšoeu kapa e bobebe e mosehla, PVC e hloekileng e thata, e thata ebile e brittle, ha e sebelisoe seoelo.Ho latela ts'ebeliso e fapaneng, li-additives tse fapaneng li ka eketsoa ho etsa likarolo tsa polasetiki tsa PVC li bonts'a thepa e fapaneng ea 'mele le ea mochini.Ho eketsa palo e nepahetseng ea polasetiki ho resin ea PVC ho ka etsa mefuta e fapaneng ea lihlahisoa tse thata, tse bonolo le tse bonaletsang.
PVC e thata ha e na kapa e na le palo e nyane ea polasetiki, e na le ho tsitsipana hantle, ho kobeha, ho hatella le ho hanyetsa, e ka sebelisoa e le thepa ea meralo feela.PVC e bonolo e na le li-plasticizers tse ngata, 'me bonolo ba eona, ho lelefatsa ha khefu le ho hanyetsa serame hoa eketseha, empa brittleness, thata le matla a thata li fokotsehile.Boima ba PVC e hloekileng ke 1.4g/cm3, 'me boholo ba likarolo tsa polasetiki tsa PVC tse nang le li-plasticizers le li-filler hangata li maemong a 1.15 ~ 2.00g/cm3.
Ho ea ka likhakanyo tsa 'maraka, hoo e ka bang 25% ea lihlahisoa tsa polasetiki tsa bongaka ke PVC.Sena se bakoa haholo ke theko e tlase ea resin, mefuta e mengata ea lits'ebetso, le ts'ebetso ea eona e bonolo.Lihlahisoa tsa PVC bakeng sa lits'ebetso tsa bongaka ke: liphaephe tsa hemodialysis, mask a phefumolohang, li-tubes tsa oksijene joalo-joalo.
2. Polyethylene (PE, Polyethylene)
Polasetiki ea polyethylene ke mofuta o moholo ka ho fetisisa indastering ea polasetiki, e nang le lebese, e sa latsoeheng, e se nang monko le likaroloana tse benyang tse benyang tse se nang chefo.E tšoauoa ka theko e tlase, ts'ebetso e ntle, e ka sebelisoa haholo indastering, temong, ho paka le indastering ea letsatsi le letsatsi, 'me e nka boemo ba bohlokoa indastering ea polasetiki.
PE haholo-holo e kenyelletsa polyethylene e tlase (LDPE), polyethylene e phahameng haholo (HDPE) le polyethylene e phahameng ea molek'hule (UHDPE) le mefuta e meng.HDPE e na le liketane tse fokolang tsa makala holim'a ketane ea polymer, boima bo phahameng ba limolek'hule, bokhabane le letsoalo, ho thatafala ho hoholo le matla, ho se bone hantle, sebaka se phahameng sa ho qhibiliha, 'me hangata e sebelisoa likarolong tsa ente.LDPE e na le liketane tse ngata tsa makala, kahoo boima ba limolek'hule bo nyenyane, crystallinity le density e tlaase, e nang le bonolo bo betere, ho hanyetsa tšusumetso le pepeneneng, hangata e sebelisetsoang ho foka filimi, hona joale e sebelisoa haholo PVC mefuta e meng.Lisebelisoa tsa HDPE le LDPE le tsona li ka tsoakoa ho latela litlhoko tsa ts'ebetso.UHDPE e na le tšusumetso e matla, khohlano e tlase, ho hanyetsa khatello ea maikutlo le litšoaneleho tse ntle tsa ho monya matla, e leng se etsang hore e be thepa e loketseng bakeng sa likhokahano tsa letheka la maiketsetso, lengole le mahetla.
3. polypropylene (PP, polypropylene)
Polypropylene ha e na 'mala, ha e na monko ebile ha e chefo.E shebahala joaloka polyethylene, empa e pepenene ebile e bobebe ho feta polyethylene.PP ke thermoplastic e nang le thepa e ntle haholo, e nang le matla a khoheli a manyane (0.9g/cm3), e seng chefo, e bonolo ho sebetsa, ho hanyetsa tšusumetso, ho thibela ho kheloha le melemo e meng.E na le mefuta e mengata ea lits'ebetso bophelong ba letsatsi le letsatsi, ho kenyelletsa mekotla e lohiloeng, lifilimi, mabokose a thekiso, lisebelisoa tse sireletsang terata, lintho tsa ho bapala, li-bumpers tsa koloi, likhoele, mochini o hlatsoang joalo-joalo.
Medical PP e na le pepenene e phahameng, tšitiso e ntle le ho hanyetsa mahlaseli, e le hore e be le mefuta e mengata ea likopo ho lisebelisoa tsa bongaka le indasteri ea ho paka.Lisebelisoa tseo e seng tsa PVC tse nang le PP joalo ka 'mele oa mantlha hajoale li sebelisoa haholo e le mefuta e meng ea lisebelisoa tsa PVC.
4. Polystyrene (PS) le K resin
PS ke mofuta oa boraro o moholo ka ho fetisisa oa polasetiki ka mor'a polyvinyl chloride le polyethylene, hangata e sebelisoa e le sesebelisoa sa polasetiki se nang le karolo e le 'ngoe le ts'ebeliso, litšobotsi tse kholo ke boima bo bobebe, bo bonaletsang, bo bonolo ho daea, ts'ebetso ea ho bopa e ntle, kahoo e sebelisoa haholo lipolasetiki tsa letsatsi le letsatsi. , likarolo tsa motlakase, lisebelisoa tsa optical le lisebelisoa tsa setso le thuto.Sebopeho sa eona se thata ebile se brittle, 'me se na le coefficient e phahameng ea katoloso ea mocheso, e fokotsang tšebeliso ea eona ho boenjiniere.Lilemong tse mashome tsa morao tjena, li-polystyrene tse fetotsoeng le li-styrene-based copolymers li 'nile tsa ntlafatsoa ho hlōla mefokolo ea polystyrene ho isa tekanyong e itseng.K resin ke e 'ngoe ea tsona.
K resin e entsoe ka styrene le butadiene copolymerization, ke polymer ea amorphous, e bonaletsang, e sa latsoeheng, e seng chefo, boima ba 1.01g/cm3 (tlase ho PS, AS), khanyetso e phahameng ho feta PS, pepeneneng (80 ~ 90% ) e ntle, mocheso oa mocheso oa mocheso oa 77 ℃, Palo ea butadiene e nang le thepa ea K, ho thatafala ha eona ho boetse ho fapane, ka lebaka la metsi a matle a thepa ea K, mocheso oa mocheso oa ho sebetsa o pharaletseng, kahoo ts'ebetso ea eona ea ts'ebetso e ntle.
Tšebeliso ea mantlha bophelong ba letsatsi le letsatsi e kenyelletsa linoelo, LIDS, libotlolo, liphutheloana tsa litlolo, li-hangers, lintho tsa ho bapala, lihlahisoa tsa thepa tse nkelang sebaka sa PVC, ho paka lijo le lisebelisoa tsa ho paka tsa bongaka.
5. ABS, Acrylonitrile Butadiene Styrene copolymers
ABS e na le ho tiea ho itseng, ho thatafala, ho hanyetsa tšusumetso le khanyetso ea lik'hemik'hale, ho hanyetsa mahlaseli le ho hanyetsa ethylene oxide disinfection.
ABS ts'ebelisong ea bongaka e sebelisoa haholo joalo ka lisebelisoa tsa ho buoa, likotopo tsa meropa, linale tsa polasetiki, mabokose a lisebelisoa, lisebelisoa tsa tlhahlobo le matlo a thuso ea kutlo, haholoholo matlo a mang a maholo a thepa ea bongaka.
6. Polycarbonate (PC, Polycarbonate)
Litšobotsi tse tloaelehileng tsa PCS ke ho tiea, matla, ho tiea, le ho thibela mocheso ho thibela mocheso, tse etsang hore PCS e ratoe joalo ka li-filters tsa hemodialysis, lithulusi tsa ho buoa le litanka tsa oksijene (ha li sebelisoa ho buoa pelo, sesebelisoa sena se ka tlosa carbon dioxide ho tloha ho sefubeng. mali le ho eketsa oksijene);
Lisebelisoa tse ling tsa PC ho tsa bongaka li kenyelletsa sistimi ea ente e senang nale, lisebelisoa tsa perfusion, likotlolo tsa mali tsa centrifuge, le lipiston.Ho nka monyetla ka ponahalo ea eona e phahameng, likhalase tse tloaelehileng tsa myopia li entsoe ka PC.
7. PTFE (Polytetrafluoro ethylene)
Polytetrafluoroethylene resin ke phofo e tšoeu, ponahalo ea boka, e boreleli ebile e sa thupeng, ke polasetiki ea bohlokoa ka ho fetisisa.PTFE e na le thepa e babatsehang e ke keng ea bapisoa le thermoplastics e akaretsang, kahoo e tsejoa e le "morena oa polasetiki".Coefficient ea eona ea likhohlano ke e tlase ka ho fetisisa har'a lipolasetiki, e na le biocompatibility e ntle, 'me e ka etsoa methapo ea mali ea maiketsetso le lisebelisoa tse ling tse kenngoeng ka kotloloho.
Nako ea poso: Oct-25-2023