Yonke into okufuneka uyazi malunga nepolypropylene (PP)

I-Polypropylene (PP) yipolymer yokongeza i-thermoplastic eyenziwe ngokudityaniswa kwee-propylene monomers.Inoluhlu olubanzi lwezicelo, kubandakanya ukupakishwa kwemveliso yabathengi, iinxalenye zeplastiki kushishino lweemoto, kunye namalaphu.I-Philip Oil Company izazinzulu uPaul Hogan noRobert Banks baqala ukwenza i-polypropylene ngo-1951, kwaye kamva izazinzulu zaseTaliyane nezaseJamani uNatta noRehn nabo benza i-polypropylene.I-Natta yagqibelela kwaye yenza imveliso yokuqala yepolypropylene eSpain ngo-1954, kwaye isakhono sayo sokuqaqamba kwavusa umdla omkhulu.Ngowe-1957, ukuthandwa kwepolypropylene kuye kwanda, kwaye imveliso yorhwebo ebanzi yaqala kulo lonke elaseYurophu.Namhlanje, iye yaba yenye yeeplastiki ezisetyenziswa ngokuqhelekileyo ehlabathini.

Ibhokisi yeyeza eyenziwe ngePP enesiciko esinehenjisi

Ngokweengxelo, imfuno yangoku yehlabathi yezinto zePP malunga ne-45 yezigidi zeetoni ngonyaka, kwaye kuqikelelwa ukuba imfuno iya kunyuka malunga ne-62 yezigidi zeetoni ekupheleni kwe-2020. Isicelo esiphambili se-PP yimboni yokupakisha, leyo. Ibalelwa malunga ne-30% yosetyenziso lulonke.Okwesibini kukuveliswa kombane kunye nezixhobo, ezidla malunga nama-26%.Izixhobo zekhaya kunye nemizi-mveliso yeemoto nganye itya i-10%.Ishishini lokwakha litya i-5%.

I-PP inomphezulu ogudileyo, onokuthatha indawo yezinye iimveliso zeplastiki, ezinjengeegiya kunye neepadi zefenitshala ezenziwe ngePOM.Umphezulu ogudileyo wenza kube nzima ukuba i-PP ibambelele kwezinye iindawo, oko kukuthi, i-PP ayikwazi ukudibanisa ngokuqinileyo kunye neglue yezoshishino, kwaye ngamanye amaxesha kufuneka idibaniswe yi-welding.Xa kuthelekiswa nezinye iiplastiki, iPP nayo ineempawu zokuxinana okuphantsi, ezinokunciphisa ubunzima kubasebenzisi.I-PP inokuchasana okugqwesileyo kwizinyibilikisi eziphilayo ezifana negrisi kwiqondo lobushushu begumbi.Kodwa iPP kulula ukuyikhupha kwiqondo lokushisa eliphezulu.

Enye yeenzuzo eziphambili zePP kukusebenza kwayo okugqwesileyo, okunokwenziwa ngokubumba inaliti okanye ukusetyenzwa kweCNC.Ngokomzekelo, kwibhokisi yeyeza ye-PP, isiciko sixhunyiwe kumzimba webhotile ngehinge ephilayo.Ibhokisi yeepilisi inokucutshungulwa ngokuthe ngqo ngokubumba inaliti okanye i-CNC.I-hinge ephilayo edibanisa isiciko ishidi leplastiki elincinci kakhulu, elinokuthi ligobe ngokuphindaphindiweyo (lihamba kwinqanaba eligqithisileyo elisondele kwii-360 degrees) ngaphandle kokuphuka.Nangona i-hinge ephilayo eyenziwe nge-PP ayikwazi ukuthwala umthwalo, ifanelekile kakhulu kwibhotile yeemfuno zemihla ngemihla.

Enye inzuzo ye-PP kukuba inokucoliswa ngokulula kunye nezinye iipolymers (ezifana ne-PE) ukwenza iiplastiki ezidibeneyo.I-copolymer itshintsha kakhulu iipropati zezinto eziphathekayo, kwaye inokufezekisa izicelo zobunjineli ezinamandla xa kuthelekiswa nePP ecocekileyo.

Esinye isicelo esingenakulinganiswa kukuba iPP inokusebenza njengezinto zombini zeplastiki kunye nefiber material.

Iimpawu ezingentla zithetha ukuba i-PP ingasetyenziswa kwizicelo ezininzi: iipleyiti, iitreyi, iikomityi, iibhegi, izitya zeplastiki ezikhanyayo kunye namathoyizi amaninzi.

Ezona mpawu zibalulekileyo zePP zezi zilandelayo:

Ukumelana nemichiza: I-alkali ehlanjululweyo kunye ne-acids ayisebenzi kunye ne-PP, eyenza ibe yisitya esifanelekileyo kwizinto ezinjalo zolwelo (ezifana ne-detergents, iimveliso zoncedo lokuqala, njl.).

I-Elasticity kunye nokuqina: I-PP ine-elasticity ngaphakathi koluhlu oluthile lokuphambuka, kwaye iya kuba ne-deformation yeplastiki ngaphandle kokuqhekeka kwinqanaba lokuqala lokuguqulwa, ngoko ngokuqhelekileyo ithathwa njengento "enzima".Ukuqina ligama lobunjineli elichazwa njengesakhono semathiriyeli ukuguqula (i-plastic deformation kunokuba i-elastic deformation) ngaphandle kokuphuka.

Ukumelana nokukhathala: I-PP igcina imilo yayo emva kokujija okuninzi kunye nokugoba.Olu phawu lubaluleke kakhulu ekwenzeni iihenjisi eziphilayo.

I-Insulation: Izinto zePP zinokuchasana okuphezulu kwaye zizinto ezikhuselayo.

I-Transmittance: Inokwenziwa ibe ngumbala ocacileyo, kodwa ngokuqhelekileyo yenziwa umbala opaque wendalo kunye nokudluliselwa kombala othile.Ukuba kufuneka ukuhanjiswa okuphezulu, i-acrylic okanye iPC kufuneka ikhethwe.

I-PP yi-thermoplastic enendawo yokunyibilika malunga ne-130 degrees Celsius, kwaye iba lulwelo emva kokufikelela kwinqanaba lokunyibilika.Njengezinye i-thermoplastics, i-PP inokufudumeza kwaye ipholile ngokuphindaphindiweyo ngaphandle kokuthotywa okukhulu.Ke ngoko, iPP inokuphinda isetyenziswe kwaye ifumaneke lula.

Kukho iintlobo ezimbini eziphambili: i-homopolymers kunye ne-copolymers.Ii-copolymers ziphinde zohlulwe zibe zii-copolymers zebhloko kunye nee-copolymers ezingahleliwe.Icandelo ngalinye linezicelo ezizodwa.I-PP idla ngokubizwa ngokuba yi-"steel" ye-industry industry yeplastiki, kuba inokwenziwa ngokudibanisa izongezo kwi-PP, okanye yenziwe ngendlela ekhethekileyo, ukwenzela ukuba i-PP ikwazi ukuguqulwa kwaye ilungiselelwe ukuhlangabezana neemfuno ezizodwa zesicelo.

I-PP yokusetyenziswa ngokubanzi kwimizi-mveliso yi-homopolymer.I-Block copolymer PP yongezwa nge-ethylene ukuphucula ukuchasana kwempembelelo.Random copolymer PP isetyenziselwa ukwenza ductile ngakumbi kunye neemveliso transparent

Njengezinye iiplastiki, iqala ukusuka "kumacandelo" (amaqela alula) akhiwe yi-distillation ye-hydrocarbon fuels kwaye idibanisa nezinye ii-catalysts ukwenza iiplastiki ngokusebenzisa i-polymerization okanye i-condensation reactions.

PP 3D yoshicilelo

I-PP ayinakusetyenziselwa ushicilelo lwe-3D kwifom ye-filament.

PP CNC processing

I-PP isetyenziselwa ukusetyenzwa kwe-CNC kwifom yephepha.Xa sisenza iiprototypes zenani elincinci lamalungu ePP, sidla ngokwenza iCNC machining kuzo.I-PP ineqondo lokushisa eliphantsi le-annealing, elithetha ukuba likhubazeka ngokulula ngenxa yobushushu, ngoko lifuna umgangatho ophezulu wobuchule bokusika ngokuchanekileyo.

Isitofu sePP

Nangona i-PP ineempawu ze-semi-crystalline, kulula ukuyibumba ngenxa ye-viscosity yayo ephantsi yokunyibilika kunye nolwelo oluhle kakhulu.Olu phawu luphucula kakhulu isantya apho izinto zizalisa isikhunta.Izinga lokunciphisa i-PP li malunga ne-1-2%, kodwa liya kuhluka ngenxa yezinto ezininzi, kubandakanywa ukubamba uxinzelelo, ixesha lokubamba, ukushisa okunyibilikayo, ubukhulu bodonga lokubumba, ubushushu bokubumba, kunye nohlobo kunye nepesenti yezongezo.

Ukongeza kwizicelo zeplastiki eziqhelekileyo, i-PP ikwafaneleka kakhulu ukwenza imicu.Iimveliso ezinjalo ziquka iintambo, iikhaphethi, i-upholstery, iimpahla, njl.

Ziziphi iingenelo zePP?

I-PP ifumaneka lula kwaye inexabiso eliphantsi.

I-PP inamandla aphezulu okuguquguquka.

I-PP inobuso obugudileyo.

I-PP ibubungqina bokufuma kwaye inokufunxa okuphantsi kwamanzi.

I-PP inokumelana kakuhle neekhemikhali kwii-asidi ezahlukeneyo kunye ne-alkali.

I-PP inokumelana nokudinwa okuhle.

I-PP inamandla empembelelo entle.

I-PP sisithinteli sombane esilungileyo.

●I-PP ine-coefficient ephezulu yokwandiswa kwe-thermal, ekhawulela izicelo zayo eziphezulu zokushisa.
● I-PP isesichengeni sokuthotywa yimitha ye-ultraviolet.
● I-PP inokumelana okulambathayo kwi-solvents e-chlorine kunye nee-hydrocarbons ezinevumba elimnandi.
● I-PP inzima ukuyitshiza kumphezulu ngenxa yeempawu zayo zokubambelela.
● I-PP inokutsha kakhulu.
● I-PP kulula ukuyikhupha.