Polypropylene (PP) yog ib qho thermoplastic ntxiv polymer ua los ntawm kev sib xyaw ntawm propylene monomers.Nws muaj ntau yam kev siv, suav nrog cov neeg siv khoom ntim khoom, cov khoom yas rau kev lag luam tsheb, thiab textiles.Philip Oil Company kws tshawb fawb Paul Hogan thiab Robert Banks thawj zaug ua polypropylene hauv 1951, thiab tom qab ntawd Italian thiab German kws tshawb fawb Natta thiab Rehn kuj ua polypropylene.Natta ua tiav thiab tsim cov khoom lag luam polypropylene thawj zaug hauv Spain hauv xyoo 1954, thiab nws lub peev xwm crystallization ua rau muaj kev txaus siab heev.Los ntawm xyoo 1957, cov koob npe ntawm polypropylene tau nce siab, thiab kev lag luam dav dav tau pib thoob plaws Tebchaws Europe.Niaj hnub no, nws tau dhau los ua ib qho ntawm cov khoom siv ntau tshaj plaws hauv ntiaj teb.
Lub thawv tshuaj ua los ntawm PP nrog lub hau hinged
Raws li cov lus ceeb toom, tam sim no thoob ntiaj teb kev thov rau PP cov ntaub ntawv yog kwv yees li 45 lab tons hauv ib xyoos, thiab nws tau kwv yees tias qhov kev thov yuav nce mus txog 62 lab tons thaum kawg ntawm 2020. Daim ntawv thov tseem ceeb ntawm PP yog kev lag luam ntim khoom, uas. suav txog li 30% ntawm tag nrho cov kev siv.Qhov thib ob yog kev tsim hluav taws xob thiab khoom siv, uas siv li 26%.Cov khoom siv hauv tsev thiab kev lag luam tsheb tsheb txhua tus siv 10%.Kev tsim kho kev lag luam siv 5%.
PP muaj qhov sib luag zoo, uas tuaj yeem hloov qee yam khoom yas, xws li iav thiab rooj tog zaum ua los ntawm POM.Qhov saum npoo du kuj ua rau nws nyuaj rau PP kom ua raws li lwm qhov chaw, uas yog, PP tsis tuaj yeem ruaj khov nrog cov kua nplaum, thiab qee zaum yuav tsum tau sib txuas los ntawm vuam.Piv nrog rau lwm cov yas, PP kuj muaj cov yam ntxwv ntawm qhov ntom ntom, uas tuaj yeem txo qhov hnyav rau cov neeg siv.PP muaj kev tiv thaiv zoo rau cov kuab tshuaj organic xws li roj ntawm chav tsev kub.Tab sis PP yog ib qho yooj yim rau oxidize ntawm qhov kub thiab txias.
Ib qho ntawm qhov zoo ntawm PP yog nws cov kev ua tau zoo heev, uas tuaj yeem tsim los ntawm kev txhaj tshuaj molding lossis CNC ua.Piv txwv li, hauv lub thawv tshuaj PP, lub hau txuas nrog lub raj mis lub cev los ntawm lub pob khawm nyob.Lub thawv tshuaj tuaj yeem ua tiav ncaj qha los ntawm kev txhaj tshuaj molding lossis CNC.Lub pob khawm nyob txuas lub hau yog ib daim ntawv yas nyias nyias, uas tuaj yeem khoov duav (txav mus rau qhov siab tshaj plaws ze li 360 degrees) yam tsis muaj kev tawg.Txawm hais tias lub pob khawm nyob ua los ntawm PP tsis tuaj yeem nqa lub nra, nws yog qhov tsim nyog rau lub raj mis ntawm cov khoom siv niaj hnub.
Lwm qhov zoo ntawm PP yog tias nws tuaj yeem yooj yim copolymerized nrog lwm cov polymers (xws li PE) los tsim cov yas sib xyaw.Cov copolymer hloov pauv cov khoom ntawm cov khoom, thiab tuaj yeem ua tiav cov ntawv thov engineering zoo dua piv nrog cov ntshiab PP.
Lwm daim ntawv thov tsis muaj txiaj ntsig yog tias PP tuaj yeem ua raws li cov khoom siv yas thiab cov khoom siv fiber ntau.
Cov yam ntxwv saum toj no txhais tau hais tias PP tuaj yeem siv rau hauv ntau daim ntawv thov: phaj, tais, khob, hnab tes, ntim yas opaque thiab ntau yam khoom ua si.
Cov yam ntxwv tseem ceeb tshaj plaws ntawm PP yog raws li hauv qab no:
Tshuaj tiv thaiv: Diluted alkalis thiab acids tsis hnov mob nrog PP, uas ua rau nws yog ib qho zoo tagnrho ntim rau cov kua (xws li detergents, thawj pab khoom, thiab lwm yam).
Elasticity thiab toughness: PP muaj elasticity nyob rau hauv ib tug ntau yam ntawm deflection, thiab yuav undergo yas deformation tsis tawg nyob rau hauv thaum ntxov theem ntawm deformation, yog li nws yog feem ntau suav hais tias yog ib tug "tawv" khoom.Toughness yog ib lub ntsiab lus engineering uas txhais tau tias yog lub peev xwm ntawm cov khoom siv los deform (yas deformation es tsis yog elastic deformation) tsis tawg.
Kev qaug zog ua haujlwm: PP khaws nws cov duab tom qab ntau qhov sib tw thiab khoov.Qhov no feature yog tshwj xeeb tshaj yog muaj nqis rau ua nyob hinges.
Rwb thaiv tsev: PP cov khoom muaj kev tiv thaiv siab thiab yog cov khoom siv insulating.
Transmittance: Nws tuaj yeem ua rau hauv cov xim pob tshab, tab sis feem ntau nws yog ua rau hauv cov xim opaque nrog qee cov xim transmittance.Yog tias xav tau kev xa tawm siab, acrylic lossis PC yuav tsum xaiv.
PP yog ib qho thermoplastic nrog lub melting point ntawm txog 130 degrees Celsius, thiab ua kua tom qab ncav lub melting point.Zoo li lwm yam thermoplastics, PP tuaj yeem ua kom sov thiab txias dua tsis muaj kev puas tsuaj loj.Yog li, PP tuaj yeem rov ua dua thiab rov qab tau yooj yim.
Nws muaj ob hom: homopolymers thiab copolymer.Copolymers tau muab faib ua block copolymer thiab random copolymer.Txhua qeb muaj cov ntawv thov tshwj xeeb.PP feem ntau hu ua "steel" khoom ntawm kev lag luam plastics, vim tias nws tuaj yeem tsim los ntawm kev ntxiv cov khoom ntxiv rau PP, los yog tsim nyob rau hauv ib txoj kev tshwj xeeb, kom PP tuaj yeem hloov kho thiab kho kom haum raws li cov ntawv thov tshwj xeeb.
PP rau kev lag luam dav siv yog homopolymer.Block copolymer PP yog ntxiv nrog ethylene los txhim kho kev cuam tshuam.Random copolymer PP yog siv los ua cov khoom lag luam ntau dua thiab pob tshab
Zoo li lwm yam plastics, nws pib los ntawm "feem ntau" (cov pab pawg sib zog) tsim los ntawm distillation ntawm hydrocarbon fuels thiab ua ke nrog lwm cov catalysts los tsim cov yas los ntawm polymerization los yog condensation tshua.
PP 3D luam ntawv
PP tsis tuaj yeem siv rau 3D luam ntawv hauv daim ntawv filament.
PP CNC ua
PP yog siv rau CNC ua hauv daim ntawv.Thaum ua cov qauv ntawm ib qho me me ntawm PP qhov chaw, peb feem ntau ua CNC machining rau lawv.PP muaj qhov kub thiab txias, uas txhais tau hais tias nws yooj yim deformed los ntawm tshav kub, yog li nws yuav tsum tau muaj kev txawj ntse txiav kom raug.
PP txhaj tshuaj
Txawm hais tias PP muaj cov khoom siv semi-crystalline, nws yooj yim rau cov duab vim nws cov viscosity tsawg thiab fluidity zoo heev.Qhov no feature zoo heev txhim kho qhov ceev ntawm cov khoom nyob rau hauv lub pwm.Lub shrinkage tus nqi ntawm PP yog li ntawm 1-2%, tab sis nws yuav txawv vim muaj ntau yam, xws li tuav lub siab, tuav lub sij hawm, melting kub, pwm phab ntsa thickness, pwm kub, thiab hom thiab feem pua ntawm additives.
Ntxiv nrog rau cov ntaub ntawv yas, PP kuj tsim nyog rau kev ua cov fibers.Cov khoom xws li hlua, ntaub pua plag, upholstery, khaub ncaws, thiab lwm yam.
Dab tsi yog qhov zoo ntawm PP?
PP yog yooj yim muaj thiab kuj pheej yig.
PP muaj zog flexural siab.
PP muaj ib tug du nto.
PP yog dej-pov thawj thiab tsis muaj dej nqus.
PP muaj cov tshuaj tiv thaiv zoo hauv ntau cov kua qaub thiab alkalis.
PP muaj kev qaug zog zoo.
PP muaj kev cuam tshuam zoo zog.
PP yog cov khoom siv hluav taws xob zoo.
●PP muaj cov coefficient siab ntawm thermal expansion, uas txwv nws cov kev siv kub.
● PP yog qhov cuam tshuam rau degradation los ntawm ultraviolet rays.
● PP muaj qhov tsis zoo rau cov kuab tshuaj chlorinated thiab muaj ntxhiab hydrocarbons.
● PP yog qhov nyuaj rau tshuaj tsuag rau saum npoo vim nws cov khoom tsis zoo adhesion.
● PP yog cov nplaim taws heev.
● PP yog yooj yim rau oxidize.
Post lub sij hawm: Lub Xya hli ntuj-27-2023