Taw qhia: raws li ib qho ntawm cov dav dav dav, PP tuaj yeem pom txhua qhov chaw hauv lub neej txhua hnub. Nws tau ntau dua huv dua li lub PC zoo tib yam. Txawm hais tias nws tsis muaj lub siab xim ntawm ABS, PP muaj ntau dua huv thiab xim rendering. Hauv kev lag luam, pp khoom siv feem ntau siv nyob rau hauv cov ntaub ntawv ntim xws liYas hwj, Lub kaus mom fwj, Cov Faj Nplig, thiab lwm yam. Kuv tau txheeb los ntawmRB pobthiab koom nrog cov khoom siv rau siv:
Tshuaj lom neeg lub npe: polypropene
Lus Askiv Lub Npe: Polypropylene (raug xa mus rau ua PP)
Pp yog ib tug crystalline polymer. Ntawm cov kev siv cov plastics feem ntau, PP yog lub teeb pom kev zoo tshaj plaws, nrog qhov ntom ntawm tsuas yog 0.91g / cm3 (tsawg dua dej). Ntawm cov dav dav-lub hom phiaj plastics, pp muaj qhov zoo tshaj plaws kub tsis kam. Nws cov cua sov distortion kub yog 80-100 ° C thiab tuaj yeem rhaub dej npau npau. PP muaj kev ntxhov siab zoo ua kom tsis kam thiab muaj kev ua neej nkees. Nws yog feem ntau hu ua "100% yas". Cov kev ua tau zoo ntawm PP zoo dua li ntawm PE khoom. PP cov khoom muaj lub teeb lub teeb, cov tshuaj zoo thiab cov tshuaj zoo.
Qhov tsis zoo ntawm PP: Tsis muaj qhov tseeb qhov tseeb, huab cua tsis zoo, nws yog ib qho yooj yim rau hnub nyoog, thiab yooj yim kom deform.
01
Cov yam ntxwv pwm
1) Cov ntaub ntawv crystalline muaj tsawg dua hygroscopicity thiab ib txwm mus rau yaj slacture, thiab nws yooj yim mus rau kev sib chwv ntev nrog cov hlau kub.
2) Lub fluabity yog qhov zoo, tab sis cov shrinkage ntau thiab shrinkage muaj nuj nqis yog loj, thiab shrinkage qhov, dents, thiab deformation yog yooj yim tshwm sim.
3) Cua txias nrawm nrawm yog nrawm nrawm, lub kaw lus txias thiab lub tshuab cua txias yuav tsum maj mam dissipipe cua sov, thiab xyuam xim kom tswj tau cov tshuaj kub molding. Cov khoom kub yog qhov yooj yim los ua kev taw qhia ntawm qhov kub tsawg thiab kub siab. Thaum cov pwm kub yog qis dua 50 degrees, cov yas tsis yog du, thiab nws yog qhov yooj yim los ua cov khoom siv tsis zoo, txaus rau kev ntaus nkauj saum toj no 90 degrees
4) Cov yas yas phab ntsa tuab yuav tsum yog cov khaub ncaws kom tsis txhob muaj kua nplaum thiab cov kua nplaum kom tiv thaiv kev ntxhov siab.
02
Txheej Txheem Cov yam ntxwv
PP muaj fluidity zoo ntawm melting kub thiab molding zoo molding ua haujlwm. PP muaj ob yam ntxwv hauv kev ua
Ib qho: vepcosity ntawm PP melt txo qis nrog qhov nce ntawm shear tus nqi (tsawg cuam tshuam los ntawm kub)
Thib ob: Cov Qib Molecular yog qhov siab thiab lub ntsws ua rau muaj tus nqi qis dua.
Kev ua qhov kub ntawm PP yog nyob ib puag ncig 200-300 ℃. Nws muaj zoo thermal stability (lub disomposition kub yog 310 ℃), tab sis thaum kub (270-300 ℃), nws yuav ua rau muaj kev chim yog tias nws nyob hauv lub thoob ntev. Vim tias lub pp txo qis dua nrog kev nce ntawm shear ceev, ua kom muaj kev txhaj tshuaj ceev thiab txhim kho shrinkage thiab kev nyuaj siab. Cov pwm kub yuav tsum tau tswj tsis pub dhau thaj tsam ntawm 30-50 ℃. PP yaj tuaj yeem dhau los ntawm kev sib cav sib ceg me me thiab tshwm sim hauv ntej. Hauv cov txheej txheem melting ntawm pp, nws tau nqus tau ntau npaum li cas ntawm kev kub ntxhov ntawm kev sib tw (kub tshaj plaws kub), thiab cov khoom lag luam yog kub ntawm cov pwm. PP cov khoom siv tsis tas yuav tsum tau qhuav thaum ua, thiab shrinkage tus nqi thiab crystallinity ntawm PP yog qis dua li PE.
03
Cov ntsiab lus kom ceeb toom hauv kev ua yas
Yas Ua
Ntshiab PP yog translucent kaus ntxhw dawb thiab tuaj yeem ua kom tau cov xim ntau. PP tsuas yog dyed nrog cov xim masterbatch ntawm cov qauv kev txhaj tshuaj ywj pheej uas ntxiv dag zog rau cov nyhuv sib xyaw, thiab lawv kuj tuaj yeem ua kom tau nrog toner.
Cov khoom siv siv sab nraud sab nraud yog feem ntau tau sau nrog UV Stabilizers thiab carbon dub. Kev siv sib piv ntawm cov khoom siv ua rov ua dua tshiab yuav tsum tsis pub tshaj 15%, txwv tsis pub nws yuav ua rau muaj zog poob thiab decomposition thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration thiab discoloration. Feem ntau, tsis muaj kev kho kom qhuav tshwj xeeb yuav tsum tau ua ua ntej PP txhaj tshuaj.
Txhaj Tshuaj Molding Tshuab Kev Xaiv
Tsis muaj tshwj xeeb cov xav tau rau kev xaiv ntawm kev txhaj tshuaj molding tshuab. Vim tias pp muaj siab crystallinity. Lub koos pij tawj lub computer molding tshuab nrog kev txhaj tshuaj ntau dua thiab kev tswj hwm ntau theem yog qhov yuav tsum tau ua. Lub zog clamping feem ntau txiav txim los ntawm 3800t / M2, thiab kev txhaj tshuaj ntim yog 20% -85%.
Pwm thiab Rooj vag Tsim
Lub pwm kub yog 50-90 ℃, thiab lub siab pwm kub yog siv rau qhov yuav tsum muaj ntau dua. Cov mob kub tshaj yog ntau dua 5 ℃ qis dua li cov kab noj hniav kub, tus khiav hla yog 4-7mm, lub nroog muaj peev xwm ua tau me me li 0.7mm.
Qhov ntev ntawm ntug lub rooj vag yog luv li sai tau, txog 0.7mm, qhov tob yog ib nrab ntawm lub phab ntsa tuab, thiab nws maj mam nce nrog qhov ntev ntawm cov kab tsuag.
Lub pwm yuav tsum muaj qhov cua zoo. Lub qhov cua lub qhov yog 0.025mm-0.038mm tob thiab 1.5mm tuab. Yuav kom tsis txhob shrinkage cov cim, siv loj thiab hloov cov neeg sib tw thiab cov neeg khiav tsheb, thiab cov tuab tuab, thiab qhov piv txwv, 50-60% ntawm phab ntsa tuab).
Cov tuab ntawm cov khoom ua los ntawm homopolymer pp yuav tsis pub tshaj 3mm, txwv tsis pub muaj yuav muaj cov khoom npuas (cov khoom siv tuab cov duab tsuas yog siv cov ntawv luam tawm capolymer pp).
Melting kub
Lub ntsiab lus melting ntawm PP yog 160-175 ° C, thiab lub disromposition kub yog 350 ° C, tab sis qhov kub thiab txias tau tsis tshaj 275 ° C thaum lub sijhawm ua haujlwm. Qhov kub nyob rau hauv seem melting yog nyiam dua 240 ° C.
Txhaj tshuaj tiv thaiv ceev
Txhawm rau kom txo sab hauv kev ntxhov siab thiab deformation, qhov kev txhaj tshuaj tiv thaiv kev nrawm nrawm, tab sis qee qib ntawm pp thiab pwm tsis haum (npuas thiab cov pa hauv tib neeg lub mantle). Yog tias cov qauv txawv tshwm nrog lub teeb thiab qhov tsaus nti kab txaij diffused los ntawm lub rooj vag, kev txhaj tshuaj qis thiab ntau dua pwm txias yuav tsum tau siv.
Qhuav rov qab siab
5Bar yaj adhesive rov qab siab tuaj yeem siv tau, thiab rov qab siab ntawm cov khoom siv toner tuaj yeem hloov kho kom zoo.
Kev txhaj tshuaj thiab siab tuav
Siv kev txhaj tshuaj ntau dua (1500-1800bar) thiab tuav siab (li 80% ntawm kev txhaj tshuaj nias siab). Hloov mus rau kev tuav siab ntawm txog 95% ntawm kev mob stroke tag nrho, thiab siv lub sijhawm sib npaug.
Kev ua haujlwm tom qab
Txhawm rau tiv thaiv cov shrinkage thiab deformation tshwm sim los ntawm cov post-crystallization, cov khoom lag luam feem ntau yuav tsum tau soaked nyob rau hauv dej kub.
Shanghai Zaj sawv Industrial Co., Ltdyog cov chaw tsim khoom,Shanghai Zaj Tshuav PobMuab ib qho chaw pleev xim rau ib qho-kom huv si .Yog koj nyiam peb cov khoom, koj tuaj yeem ua tauTiv tauj peb,
Lub Vev Xaib:www.rainbow-pkg.com
Email:Bobby@rainbow-pkg.com
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Lub sijhawm Post: Oct-04-2021