Polypropylene (PP) icrystalline thermoplastic yakasimba inoshandiswa muzvinhu zvemazuva ese.Kune marudzi akasiyana-siyana ePP anowanikwa: homopolymer, copolymer, kukanganisa, nezvimwewo. Michina yayo, yemuviri, uye makemikari maitiro anoshanda zvakanaka mumashandisirwo kubva kumotokari uye kurapwa kusvika pakurongedza.
Chii chinonzi Polypropylene?
Polypropylene inogadzirwa kubva kune propene (kana propylene) monomer.Iyo mutsara wehydrocarbon resin.Iyo kemikari formula yepolypropylene ndeye (C3H6) n.PP iri pakati pemapurasitiki akachipa aripo nhasi, uye Iyo ine yakaderera density pakati pezvigadzirwa zvepurasitiki.Pamusoro pe polymerization, PP inogona kuumba matatu ekutanga cheni zvimiro zvinoenderana nenzvimbo yemapoka emethyl:
Atactic (APP).Irregular methyl boka (CH3) kuronga
Isotactic (iPP).Methyl mapoka (CH3) akarongwa kune rumwe rutivi rwekabhoni cheni
Syndiotactic (sPP).Alternating methyl boka (CH3) kuronga
PP ndeyemhuri yepololefin yemapolymers uye ndeimwe yepamusoro-matatu anonyanya kushandiswa-mapolima nhasi.Polypropylene ine maapplication — ese epurasitiki uye sefiber — muindasitiri yemotokari, maindasitiri ekushandisa, zvinhu zvevatengi, uye musika wefenicha.
Mhando dzakasiyana dzePolypropylene
Homopolymers uye copolymers ndiwo maviri makuru marudzi epolypropylene anowanikwa mumusika.
Propylene homopolymerndiro rinonyanya kushandiswa zvakafara-chinangwa giredhi.Iyo ine chete propylene monomer mune semi-crystalline yakasimba fomu.Zvishandiso zvikuru zvinosanganisira kurongedza, machira, hutano hwehutano, mapaipi, mota, uye magetsi ekushandisa.
Polypropylene copolymeryakakamurwa kuita zvisingaite copolymers uye block copolymers inogadzirwa ne polymerizing yepropene uye ethane:
1. Propylene random copolymer inogadzirwa ne polymerizing pamwe ethene uye propene.Inosanganisira ethene units, kazhinji inosvika 6% nehukuru, inosanganisirwa zvisina tsarukano mumaketani epolypropylene.Aya mapolymer anochinjika uye akajeka zvakajeka, achiita kuti ave akakodzera maapplication anoda kujeka uye kune zvigadzirwa zvinoda kutaridzika kwakanaka.
2. Propylene block copolymer ine yakakwirira ethene content (pakati pe5 ne15%).Iyo ine ma-co-monomer mayuniti akarongwa mune yakajairwa pateni (kana mabhuroko).Iyo yenguva dzose pateni inoita iyo thermoplastic yakasimba uye isingaite brittle pane yakasarudzika co-polymer.Aya mapolymer akakodzera maapplication anoda simba repamusoro, senge mashandisirwo emaindasitiri.
Imwe mhando yepolypropylene inokanganisa copolymer.A propylene homopolymer ine co-mixed propylene random copolymer phase ine ethylene content ye45-65% inotumirwa kuPP impact copolymer.Impact copolymers inonyanya kushandiswa mukurongedza, imba, firimu, uye pombi maapplication, pamwe nezvikamu zvemotokari nemagetsi.
Polypropylene Homopolymer vs. Polypropylene Copolymer
Propylene homopolymerine reshiyo yepamusoro yekusimba-ku-huremu, uye yakaoma uye yakasimba kupfuura iyo copolymer.Izvi zvimiro zvakasanganiswa neakanaka makemikari kuramba uye weldability inoita kuti ive chinhu chesarudzo mune dzakawanda dziviriro inodzivirira zvimiro.
Polypropylene copolymeryakati nyoro asi ine simba rekuita zvirinani.Iyo yakasimba uye yakasimba kupfuura propylene homopolymer.Inoita kunge iine zvirinani stress crack resistance uye yakadzika tembiricha kuomarara pane homopolymer pamutengo wekudzikisa kudiki mune zvimwe zvivakwa.
PP Homopolymer uye PP Copolymer Zvikumbiro
Zvikumbiro zvakada kufanana nekuda kwezvakagovaniswa zvivakwa.Nekuda kweizvozvo, sarudzo pakati pezvinhu zviviri izvi zvinowanzoitwa zvichibva pane zvisiri zvehunyanzvi.
Kuchengeta ruzivo pamusoro pezvinhu zve thermoplastic kare kunobatsira nguva dzose.Izvi zvinobatsira pakusarudza iyo thermoplastic chaiyo yekushandisa.Inobatsirawo mukuongorora magumo ekushandisa anodiwa angazadzikiswa kana kwete.Heano mamwe akakosha zvivakwa uye mabhenefiti epolypropylene:
Kunyunguduka kwepolypropylene.Iyo yekunyunguduka kwepolypropylene inoitika padanho.
● Homopolymer: 160-165°C
● Copolymer: 135-159°C
Density ye polypropylene.PP ndeimwe yemapolima akareruka pakati pezvinhu zvese zvepurasitiki.Ichi chimiro chinoita kuti ive sarudzo yakakodzera yehuremu / huremu--kuchengetedza maapplication.
● Homopolymer: 0.904-0.908 g/cm3
● Random copolymer: 0.904-0.908 g/cm3
● Impact copolymer: 0.898-0.900 g/cm3
Polypropylene chemical resistance
● Kuramba kwakanakisa kune yakanyungudutswa uye yakadzika asidhi, madoro, uye mabhesi
● Kuramba kwakanaka kumaaldehydes, ester, aliphatic hydrocarbons, uye ketone
● Kudzivirira kushoma kune anonhuhwirira uye halogenated hydrocarbons uye oxidizing agents
Zvimwe zvinokosha
● PP inochengetedza zvinhu zvemagetsi uye zvemagetsi panzvimbo yakakwirira yekushisa, mumamiriro emvura, uye kana yakanyura mumvura.Ipurasitiki inodzinga mvura
● PP ine kushorwa kwakanaka kwekunetseka kwezvakatipoteredza uye kuputika
● Inonzwa kurwiswa neutachiona (bacteria, mold, etc.)
● Inoratidza kupikisa kwakanaka kune steam sterilization
Polymer additives senge zvinojekesa, zvinodzosa moto, magirazi fiber, zvicherwa, conductive mafirita, mafuta ekuzora, pigment, uye zvimwe zvakawanda zvinowedzera zvinogona kuwedzera kuvandudza kwePP yemuviri uye / kana michina zvivakwa.Semuenzaniso, PP haina kumira zvakanaka kuUV, nekudaro kudzikamiswa kwechiedza nemamines akavharirwa kunosimudzira hupenyu hwesevhisi kana ichienzaniswa neiyo unmodified polypropylene.
Kuipa kwePolypropylene
Kusagadzikana kupikisa UV, kukanganisa, uye kukwenya
Embrittles pasi -20°C
Tembiricha yakaderera yepamusoro, 90-120°C
Inorwiswa neakanyanya oxidizing asidhi, inozvimba nekukurumidza mu chlorinated solvents uye aromatics
Kugadzikana kwekupisa-kuchembera kunokanganisa zvakanyanya nekusangana nesimbi
Post-molding dimensional shanduko nekuda kwekristallinity mhedzisiro
Pendi isina kumira zvakanaka
Zvishandiso zvePolypropylene
Polypropylene inoshandiswa zvakanyanya mumashandisirwo akasiyana siyana nekuda kwekunaka kwayo kemikari kuramba uye weldability.Zvimwe zvinowanzoshandiswa zve polypropylene zvinosanganisira:
Packaging Applications
Zvakanaka zvipingamupinyi zvivakwa, simba rakakura, kupera kwakanaka kwepamusoro, uye mutengo wakaderera zvinoita kuti polypropylene ive yakanakira akati wandei ekurongedza maapplication.
Flexible kurongedza.PP mafirimu 'akanakisa kujeka kujeka uye yakaderera mwando-mhute kutapurirana inoita kuti ive yakakodzera kushandiswa mukurongedza chikafu.Mimwe misika inosanganisira shrink-firimu overwrap, emagetsi indasitiri mafirimu, graphic art application, uye anoraswa diaper tabo uye kuvharwa.PP firimu rinowanikwa kunge rakakandwa firimu kana bi-axially orientated PP (BOPP).
Rigid kurongedza.PP inoputika yakaumbwa kuti igadzire makrete, mabhodhoro, uye mapoto.PP midziyo yakatetepa-yakavezwa inowanzoshandiswa pakurongedza chikafu.
Zvinhu zvevatengi.Polypropylene inoshandiswa muzvigadzirwa zvemumba zvakati wandei uye zvekushandisa zvevatengi, zvinosanganisira translucent parts, housewares, fenicha, midziyo, mikwende, uye matoyi.
Zvishandiso zvemotokari.Nekuda kwemutengo wayo wakaderera, yakasarudzika michina zvivakwa, uye kuumbwa, polypropylene inoshandiswa zvakanyanya muzvikamu zvemotokari.Zvishandiso zvikuru zvinosanganisira makesi ebhatiri nematireyi, mabumpers, fender liner, mukati me trim, instrumental panels, uye magonhi ekuchekesa.Zvimwe zvakakosha zvekushandisa kwemotokari yePP zvinosanganisira yakaderera coefficient yemutsara wekupisa kwekuwedzera uye chaiyo giravhiti, yakakwira makemikari kuramba uye kunaka kwemamiriro ekunze, kugadzirisika, uye kukanganisa / kuoma kwechiyero.
Fibers uye machira.Huwandu hombe hwePP hunoshandiswa muchikamu chemusika chinozivikanwa sefibers nemachira.PP fiber inoshandiswa mune zvakawanda zvekushandisa, kusanganisira raffia/slit-firimu, tepi, tambo, yakawanda inoenderera filament, staple fibers, spun bond, uye inoenderera filament.PP tambo uye twine yakasimba kwazvo uye inodzivirira hunyoro, yakakodzera kwazvo kushandiswa kwemugungwa.
Zvikumbiro zvekurapa.Polypropylene inoshandiswa mumishonga yakasiyana-siyana yekurapa nekuda kwekukwirira kwemakemikari uye bhakitiriya kuramba.Zvakare, iyo yekurapa giredhi PP inoratidza kuramba kwakanaka kune sterilization.
Majekiseni anoraswa ndiyo inonyanya kushandiswa pakurapwa kwepolypropylene.Zvimwe zvinoshandiswa zvinosanganisira mabhodhoro ekurapa, madhishi ekuongorora, petri ndiro, mabhodhoro emutsinga, mabhodhoro emuenzaniso, matireyi ezvekudya, mapani, uye midziyo yemapiritsi.
Industrial applications.Mapepa ePolypropylene anoshandiswa zvakanyanya muindasitiri yekugadzira asidhi nemakemikari matangi, mashiti, mapaipi, Returnable Transport Packaging (RTP), uye zvimwe zvigadzirwa nekuda kwehunhu hwayo senge kusimba kwakanyanya, kuramba tembiricha yakakwira, uye kushomeka kwemarara.
PP ndeye 100% inoshandiswa zvakare.Makesi ebhatiri emotokari, marambi emagetsi, tambo dzebhatiri, mitsvairo, mabhurashi, uye ice scrapers mienzaniso mishoma yezvigadzirwa zvinogona kugadzirwa kubva ku polypropylene (rPP).
Iyo PP yekudzokorodza maitiro anonyanya kunyunguduka kwemarara epurasitiki kusvika 250 ° C kubvisa zvinosvibisa zvichiteverwa nekubviswa kwemamorekuru akasara pasi pekutsvaira uye kusimba kunosvika 140 ° C.Iyi PP yakadzokororwa inogona kusanganiswa nemhandara PP pamwero unosvika 50%.Dambudziko guru mukudzokorodza kwePP rine chekuita nehuwandu hwayo inopedzwa-ikozvino ingangoita 1% mabhodhoro ePP anodzokororwa, zvichienzaniswa ne98% yekudzokorodza chiyero chePET & HDPE mabhodhoro pamwechete.
Iko kushandiswa kwePP kunoonekwa kwakachengeteka nekuti haina chero inoshamisa mhedzisiro kubva kubasa rehutano uye kuchengetedza nzvimbo yekuona, maererano nemakemikari toxicity.Kuti udzidze zvakawanda nezvePP tarisa gwara redu, iro rinosanganisira kugadzirisa ruzivo nezvimwe.
Nguva yekutumira: Jul-03-2023