Kuenzaniswa negirazi uye simbi zvinhu, iwo makuru maitiro emapurasitiki ndeaya:
1, mutengo wakaderera, unogona kushandiswa zvakare pasina disinfection, yakakodzera kushandiswa seyakagadzirwa kugadzirwa kwezvinhu zvinoraswa zvekurapa;
2, kugadzirisa kuri nyore, kushandiswa kwepurasitiki yayo inogona kugadziridzwa kuita akasiyana siyana anobatsira zvimiro, uye simbi negirazi zvakaoma kugadzira mune yakaoma chimiro chezvigadzirwa;
3, yakaoma, elastic, kwete nyore kuputsika segirazi;
4, ine yakanaka makemikari inertness uye biological kuchengeteka.
Aya mabhenefiti ekuita anoita kuti mapurasitiki ashandiswe zvakanyanya mumidziyo yekurapa, kunyanya kusanganisira polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), polycarbonate (PC), ABS, polyurethane, polyamide, thermoplastic elastomers, polysulfone uye polyether ether ketone.Kubatanidza kunogona kuvandudza kushanda kwemapurasitiki, kuitira kuti kushanda kwakanakisisa kwemashizha akasiyana-siyana kuonekwe, zvakadai se polycarbonate / ABS, polypropylene / elastomer blending modification.
Nekuda kwekubata nemushonga wemvura kana kubata nemuviri wemunhu, izvo zvakakosha zvemapurasitiki ekurapa kugadzikana kwemakemikari uye biosafety.Muchidimbu, zvikamu zvezvigadzirwa zvepurasitiki hazvigone kuiswa mumushonga wemvura kana mumuviri wemunhu, hazvizokonzerese huturu uye kukuvadzwa kwematishu uye nhengo, uye haina chepfu uye haina kukuvadza kumuviri wemunhu.Kuti ive nechokwadi chekuchengetedzeka kwemapurasitiki ekurapa, mapurasitiki ekurapa anowanzo tengeswa pamusika anosimbiswa uye anoedzwa nevakuru vezvokurapa, uye vashandisi vanoziviswa zvakajeka kuti ndeapi mamakisi ekurapa.
Mapurasitiki ekurapa muUnited States anowanzo pfuura FDA certification uye USPVI biological kutariswa, uye mapurasitiki egiredhi rekurapa muChina anowanzo kuedzwa neShandong yekurapa mudziyo Testing Center.Parizvino, kuchine huwandu hwakati wandei hwezvigadzirwa zvepurasitiki zvekurapa munyika pasina pfungwa yakasimba yekusimbisa biosafety certification, asi nekuvandudzwa zvishoma nezvishoma kwemirau, aya mamiriro achange achiwedzera kuvandudzwa.
Zvinoenderana nechimiro uye simba zvinodiwa zvechigadzirwa chechigadzirwa, isu tinosarudza iyo chaiyo mhando yepurasitiki uye giredhi rakakodzera, uye tinoona tekinoroji yekugadzirisa zvinhu.Zvinhu izvi zvinosanganisira kugadzirisa kushanda, simba remagetsi, mutengo wekushandisa, nzira yekubatanidza, sterilization, nezvimwewo. Zvinhu zvekugadzirisa uye zvepanyama uye zvemakemikari zvemapurasitiki akawanda anowanzo shandiswa anoshandiswa.
Mapurasitiki manomwe anowanzoshandiswa ekurapa
1. Polyvinyl chloride (PVC)
PVC ndeimwe yemhando dzepurasitiki dzinogadzira zvakanyanya munyika.PVC resin ichena kana yakareruka yero poda, yakachena PVC ndeye atactic, yakaoma uye brittle, isingawanzo shandiswa.Zvinoenderana nekushandiswa kwakasiyana, zvinowedzerwa zvakasiyana zvinogona kuwedzerwa kuita kuti PVC zvidimbu zvepurasitiki zviratidze zvakasiyana zvemuviri uye zvemichina.Kuwedzera huwandu hwakakodzera hweplasticizer kuPVC resin inogona kugadzira akasiyana ezvakaoma, zvinyoro uye zvakajeka zvigadzirwa.
Yakaoma PVC haina kana ine shoma shoma yeplasticizer, ine yakanaka tensile, kukotama, compressive uye kukanganisa kupikisa, inogona kushandiswa sechinhu chega chega.Yakapfava PVC ine mamwe mapurasitiki, uye kupfava kwayo, kureba panguva yekuzorora uye kutonhora kuramba kunowedzerwa, asi brittleness, kuoma uye kusimba kwesimba kunoderedzwa.Kuwanda kwePVC yakachena ndeye 1.4g/cm3, uye kuwanda kwezvikamu zvePVC zvepurasitiki zvine mapurasitiki nemafirita kazhinji ari muchikamu che1.15 ~ 2.00g/cm3.
Zvinoenderana nefungidziro yemusika, inenge 25% yezvigadzirwa zvepurasitiki zvekurapa ndeyePVC.Izvi zvinonyanya kukonzerwa nemutengo wakaderera weresin, huwandu hwakawanda hwekushandisa, uye nyore kugadzirisa.Zvigadzirwa zvePVC zvekushandisa zvekurapa ndezvi: hemodialysis pombi, masiki ekufema, machubhu okisijeni uye zvichingodaro.
2. Polyethylene (PE, Polyethylene)
Polyethylene plastiki ndiyo yakakura siyana muindasitiri yepurasitiki, mukaka, isingaravike, isina kunhuhwirira uye isina-chepfu inopenya inopenya waxy particles.Iyo inoratidzirwa nemutengo wakachipa, kuita kwakanaka, inogona kushandiswa zvakanyanya muindasitiri, kurima, kurongedza uye indasitiri yemazuva ese, uye inotora chinzvimbo chakakosha muindasitiri yepurasitiki.
PE inonyanya kusanganisira yakaderera density polyethylene (LDPE), yakakwirira density polyethylene (HDPE) uye Ultra-yakakwirira molecular uremu polyethylene (UHDPE) uye mamwe marudzi.HDPE ine macheni mashoma emapazi papolymer cheni, yakakwira huremu hwemamorekuru, crystallinity uye density, kuoma kukuru uye simba, kusaona zvakanaka, kunyungudika kwakakwira, uye inowanzoshandiswa muzvikamu zvejekiseni.LDPE ine cheni dzakawanda dzemapazi, saka huremu hwemamorekuru hudiki, crystallinity uye density yakadzikira, nekupfava kuri nani, kupikisa kupikisa uye kujeka, kunowanzo shandiswa kuridza firimu, ikozvino inoshandiswa zvakanyanya PVC imwe nzira.HDPE uye LDPE zvinhu zvinogona zvakare kusanganiswa zvichienderana nekuita zvinodiwa.UHDPE ine yakakwira simba rekuita, kukweshana kwakadzika, kuramba kushushikana kutsemuka uye yakanaka yekunyudza simba hunhu, ichiiita chinhu chakanakira hudyu, ibvi nemapfudzi zvinobatanidza.
3. polypropylene (PP, polypropylene)
Polypropylene haina ruvara, haina kunhuwa uye haina chepfu.Inoratidzika se polyethylene, asi yakajeka uye yakareruka kupfuura polyethylene.PP ndeye thermoplastic ine zvivakwa zvakanakisa, ine diki chaiyo giravhiti (0.9g/cm3), isiri-chepfu, iri nyore kugadzirisa, kukanganisa kuramba, anti-deflection uye zvimwe zvakanakira.Iine huwandu hwakawanda hwekushandisa muhupenyu hwezuva nezuva, kusanganisira mabhegi akarukwa, mafirimu, mabhokisi ekuchinja, waya ekudzivirira zvinhu, matoyi, mabumpers emota, fiber, washing machine uye zvichingodaro.
Medical PP ine kujeka kwepamusoro, yakanaka chipingamupinyi uye kuramba nemwaranzi, zvekuti ine huwandu hwakasiyana hwekushandisa mumidziyo yekurapa uye indasitiri yekurongedza.Zvisiri-PVC zvinhu zvine PP semutumbi mukuru parizvino zvinoshandiswa zvakanyanya sedzimwe nzira dzePVC zvinhu.
4. Polystyrene (PS) uye K resin
PS ndiyo yechitatu yakakura yepurasitiki yakasiyana-siyana mushure me polyvinyl chloride uye polyethylene, inowanzo shandiswa sechinhu chimwe chete-chikamu chepurasitiki kugadzirisa uye kushandiswa, hukuru huremu huremu, huri pachena, huri nyore kudhaya, kuumbwa kwekugadzirisa kushanda kwakanaka, saka kunoshandiswa zvakanyanya mumapurasitiki ezuva nezuva. , zvikamu zvemagetsi, zviridzwa zvemaziso uye zvetsika uye zvekudzidzisa.Chimiro chayo chakaoma uye chine brittle, uye ine yakakwira coefficient yekuwedzera kwekupisa, iyo inomisa kushandiswa kwayo muinjiniya.Mumakumi emakore achangopfuura, yakagadziridzwa polystyrene uye styrene-based copolymers yakagadziridzwa kukurira kukanganisa kwepolystyrene kune imwe nhanho.K resin mumwe wavo.
K resin yakagadzirwa ne styrene uye butadiene copolymerization, iri amorphous polymer, yakajeka, isina kunaka, isina chepfu, density ye 1.01g/cm3 (yakaderera pane PS, AS), yakanyanya kupikisa kuramba kupfuura PS, kujeka (80 ~ 90% ) yakanaka, thermal deformation tembiricha ye77℃, Huwandu hwebutadiene huri muK zvinhu, kuomarara kwayo kwakasiyanawo, nekuda kwemvura yakanaka yeK zvinhu, kugadzirisa tembiricha yakafara, saka mashandiro ayo ekugadzirisa zvakanaka.
Zvinonyanya kushandiswa muhupenyu hwezuva nezuva zvinosanganisira makapu, LIDS, mabhodhoro, cosmetic packaging, hangers, matoyi, PVC inotsiva zvinhu zvigadzirwa, kurongedza chikafu uye zvekurapa zvekurongedza.
5. ABS, Acrylonitrile Butadiene Styrene copolymers
ABS ine kumwe kuoma, kuomarara, kukanganisa kupikisa uye makemikari kuramba, nemwaranzi kuramba uye ethylene oxide disinfection kuramba.
ABS muchirongwa chekurapa inonyanya kushandiswa sematurusi ekuvhiya, zvigubhu zvemadhiramu, tsono dzepurasitiki, mabhokisi emidziyo, midziyo yekuongorora uye imba yekubatsira kunzwa, kunyanya dzimwe dzimba hombe dzemidziyo yekurapa.
6. Polycarbonate (PC, Polycarbonate)
Maitiro akajairika ePCS kusimba, kusimba, kusimba, uye kupisa-inodzivirira kupisa mutsi, izvo zvinoita kuti PCS ive inofarirwa sehemodialysis mafirita, ekuvhiya maturusi ekubata, uye matangi eokisijeni (kana ichishandiswa mukuvhiya mwoyo yekuvhiya, chiridzwa ichi chinogona kubvisa carbon dioxide kubva ropa uye kuwedzera oksijeni);
Zvimwe zvinoshandiswa zvePC mumushonga zvinosanganisira masisitimu ejekiseni asina-tsono, zviridzwa zveperfusion, mbiya dzeropa centrifuge, uye pistons.Kutora mukana wekujeka kwayo kwepamusoro, iwo akajairwa myopia magirazi anogadzirwa nePC.
7. PTFE (Polytetrafluoro ethylene)
Polytetrafluoroethylene resin ipfu chena, waxy kutaridzika, yakatsetseka uye isina-tsvimbo, ndiyo inonyanya kukosha plastiki.PTFE ine zvivakwa zvakanakisa zvisingaenzaniswi ne general thermoplastics, saka inozivikanwa se "mambo wepurasitiki".Iko friction coefficient ndiyo yakaderera pakati pepurasitiki, ine biocompatibility yakanaka, uye inogona kugadzirwa kuita tsinga dzeropa dzekugadzira uye zvimwe midziyo yakadzikwa zvakananga.
Nguva yekutumira: Oct-25-2023