MPPE (Modified Polypropylene Ether)yog ib qho kev ua tau zoo - hloov kho polyolefin rwb thaiv tsev cov khoom siv dav siv hauv cov teb xws li xov hlau, cables, hluav taws xob, thiab cov khoom siv hluav taws xob. Nws cov yam ntxwv tseem ceeb hloov mus ib puag ncig hluav taws xob rwb thaiv tsev, huab cua tsis kam, cov khoom siv kho tshuab, thiab kev hloov kho, uas tuaj yeem txheeb xyuas kom meej los ntawm qhov ntev hauv qab no:
1.Excellent hluav taws xob rwb thaiv tsev kev ua tau zoo (core kom zoo dua)
Cov qauv molecular ntawm MPPE tau raug hloov kho thiab ua kom zoo dua qub, nrog cov pawg polar tsawg dua thiab cov kev sib txuas ntawm cov saw hlau tsis tu ncua, ua rau nws yog ib tus neeg sawv cev ntawm cov khoom siv rwb thaiv tsev siab thiab lub hauv paus tseem ceeb rau nws daim ntawv thov hauv hluav taws xob:
(1) Siab ntim resistivity thiab dielectric poob kev ua haujlwm: Lub ntim resistivity tuaj yeem ncav cuag 1016Ω⋅cm (ntawm chav tsev kub), uas tuaj yeem tiv thaiv tau tam sim no; Tus nqi tangent ntawm dielectric poob lub kaum sab xis (tanδ) yog qhov tsawg heev (feem ntau<0.001, 50Hz), and it is not easy to cause insulation failure due to dielectric loss heating in high-frequency or high-voltage environments. It is suitable for scenarios such as high-frequency communication cables and high-voltage motor leads.
(2) Lub zog tawg zoo heev: Lub sijhawm luv luv - lub sijhawm tawg lub zog tuaj yeem ncav cuag 25-30kV / mm (chav sov, lub xeev zaj duab xis), thiab qhov txo qis ntawm kev tawg yog me me nyob rau hauv qhov kub thiab txias (xws li 100 degree) lossis qhov chaw ntub dej, deb tshaj li cov tsoos PE (polyethylene) lossis PVC (polyvinyl chloride) cov ntaub ntawv rwb thaiv tsev. Nws tuaj yeem tiv taus qhov ntsuas hluav taws xob ntev ntev yam tsis muaj rwb thaiv tsev tawg.
(3) Muaj zog tiv thaiv kab mob corona tawm: Nyob rau hauv ntev - lub sij hawm hloov hluav taws xob teb, MPPE qhov chaw tsis tshua muaj corona tawm (tsis txhob cuam tshuam kev laus los ntawm cov hluav taws xob hauv cheeb tsam), tshwj xeeb tshaj yog tsim rau buffering rwb thaiv tsev ntawm rwb thaiv tsev txheej los yog shielding khaubncaws sab nraud povtseg ntawm high -voltage cables.
2.Excellent huab cua tsis kam thiab ib puag ncig stability
MPPE kov yeej cov laus thiab tsis zoo kub tsis kam ntawm cov polyolefins zoo tib yam los ntawm kev hloov kho molecular, xws li qhia cov pab pawg antioxidant thiab UV resistant, thiab tuaj yeem hloov mus rau qhov chaw sab nraum zoov lossis ua haujlwm hnyav:
(1) Ntau yam ntawm qhov kub thiab txias tsis kam: Lub sijhawm ntev - siv qhov kub thiab txias yog -40℃~ 125℃(qee qhov kev hloov kho tuaj yeem ua tiav lub sijhawm luv luv ntawm 150 degree), thiab nws tseem tuaj yeem tswj tau qhov zoo ntawm qhov kub thiab txias (-40 degree) yam tsis muaj kev pheej hmoo ntawm tawg tawg; Thaum qhov kub thiab txias (125 degree), qhov attenuation tus nqi ntawm qhov tseem ceeb ntawm kev ua tau zoo xws li ntim resistivity thiab tawg lub zog yog tsawg dua 10%, ua rau nws tsim nyog rau cov xwm txheej xws li tsheb thaiv kab hluav taws xob (lub cav qhov chaw kub ib puag ncig) thiab sab nraum zoov photovoltaic cables.
(2) Kev laus ua haujlwm zoo thiab huab cua tsis kam: Nws muaj kev tiv thaiv zoo rau oxidative aging thiab ultraviolet (UV) kev laus - tom qab 1000 teev ntawm xenon teeb kev laus kuaj (simulating sab nraum zoov), qhov tuav tus nqi ntawm tensile zog yog ntau dua 85%, thiab qhov tuav tus nqi ntawm elongation ntawm so yog ntau dua li ntawm 8% kev ua tau zoo tshaj PE. 500 teev); Ib txhij resistant rau ozone thiab tshuaj corrosion (ruaj khov rau cov kua qaub, alkalis, roj, thiab feem ntau cov kuab tshuaj organic), nws tsis yooj yim rau cov txheej rwb thaiv tsev kom tawg los yog o vim ib puag ncig yaig.
(3) Kev tiv thaiv dej zoo heev: MPPE muaj qhov nqus dej tsawg heev (tsawg dua 0.01% hauv 24 teev ntawm 23 degree), thiab tom qab ntev - lub sij hawm immersion (xws li hauv dej los yog qhov chaw ntub dej), nws cov hluav taws xob rwb thaiv tsev kev ua tau zoo (xws li ntim resistivity) tsis tshua muaj deteriorates, ua rau nws haum rau rwb thaiv tsev ntawm cov khoom siv hluav taws xob hauv qab dej.
3.Balanced mechanical kev ua tau zoo
Muab piv rau cov ntshiab PE lossis PP (polypropylene), MPPE ua tiav qhov sib npaug ntawm "rigidity yooj" thiab "lub zog toughness" los ntawm kev hloov pauv cov saw molecular (xws li qhia cov ntu elastic lossis ntoo khaub lig- txuas cov qauv), ua tau raws li cov kev xav tau ntawm cov xwm txheej sib txawv:
(1) Kev ua tau zoo thiab khoov tsis kam: Nws tseem muaj qhov zoo ntawm kev khoov ntawm qhov kub thiab txias (-40 degree), thiab tsis tuaj yeem tawg tom qab rov khoov duav (xws li kev teeb tsa thiab xaim ntawm cov xov hlau thiab cables); Lub elastic modulus yog nruab nrab (kwv yees li 800-1200MPa), uas tsis tsuas yog zam kev tiv thaiv tsis txaus los ntawm kev muag muag, tab sis kuj zam kev ua haujlwm lossis kev teeb tsa los ntawm kev nyuaj dhau.
(2)High tensile strength and tear resistance: The tensile strength can reach 20-25MPa, the elongation at break is greater than 300%, and it can withstand external forces during installation or use; Excellent tear resistance (>50kN / m), txo qhov kev pheej hmoo ntawm rwb thaiv tsev txheej puas los ntawm kev sib txhuam hauv zos lossis kev sib tsoo.
(3) Zoo hnav tsis kam: Lub hardness ntawm qhov saum npoo yog qhov siab (Shore D hardness txog 60-70), thiab thaum nyob rau hauv kev sib cuag los yog kev sib txhuam nrog lwm cov khoom rau lub sij hawm ntev, qhov saum npoo tsis yooj yim khawb los yog hnav, ncua kev pab cuam lub neej ntawm cov rwb thaiv tsev txheej.
4.Kev ua haujlwm zoo thiab kev phooj ywg ib puag ncig
Lub melt flowability, molding adaptability, thiab ib puag ncig cov yam ntxwv ntawm MPPE ua rau nws kim heev -zoo nyob rau hauv industrial ntau lawm:
(1) Yooj yim rau txheej txheem thiab cov duab: Lub melt index (MI) tuaj yeem hloov kho los ntawm kev hloov kho (feem ntau 2-10g / 10min, 190℃/ 2.16kg), nrog cov dej ntws zoo, haum rau ntau yam txheej txheem xws li extrusion (xws li hlau thiab cable rwb thaiv tsev txheej extrusion), txhaj tshuaj molding (xws li hluav taws xob zaj duab xis tivthaiv ), thiab lwm yam. Kev ua haujlwm kub ntau yog qhov dav (feem ntau 180-230 degree), ua rau nws tsis tshua muaj kev cuam tshuam rau cov khoom lag luam vim qhov kub hloov pauv.
(2) Kev sib raug zoo thiab kev hloov kho muaj peev xwm: Nws tuaj yeem ua tau zoo nrog lwm cov polyolefins (xws li PE, EVA), nplaim hluav taws (xws li halogen-dawb nplaim hluav taws xob), antioxidants, xim masterbatch, thiab lwm yam. Los ntawm kev hloov kho, nplaim taws retardancy (xws li mus txog qib UL94 xim), tuaj yeem ua tau raws li qhov kub thiab txias 5. kev xav tau ntawm kev lag luam sib txawv (xws li txheej rwb thaiv tsev ntawm halogen-dawb tsis muaj pa luam yeeb cables).
(3) Ib puag ncig tus phooj ywg thiab tsis muaj kev phom sij: MPPE nws tus kheej tsis muaj cov khoom phom sij xws li halogens (Cl, Br), hlau hnyav, thiab phthalates. Thaum hlawv, nws tsis tso cov pa phem (xws li HCl, hydrogen bromide) lossis cov pa luam yeeb ntau. Nws ua raws li cov txheej txheem ib puag ncig xws li EU RoHS, REACH, thiab domestic GB / T 19666, thiab belongs rau "halogen-dawb tsis muaj pa luam yeeb ib puag ncig cov khoom siv rwb thaiv tsev", tsim rau thaj chaw uas muaj ib puag ncig siab xws li lub zog tshiab, kev tsheb ciav hlau, thiab kev tsim kho.
5. Kev txwv (tseem muaj ciam teb yuav tsum tau sau tseg)
Txawm hais tias MPPE muaj kev ua tau zoo heev, tseem muaj qee qhov xwm txheej txwv uas yuav tsum tau xaiv raws li qhov xav tau tiag tiag:
(1) Cov roj tsis muaj zog: Kev kam rau siab rau cov roj ntsha muaj zog (xws li cov roj ntxhia thiab roj av) yog qhov nruab nrab, thiab ntev - kev sib cuag yuav ua rau o me ntsis. Yog li ntawd, nws tsis haum rau ib puag ncig uas tuaj rau hauv kev sib cuag ncaj qha nrog roj lossis roj muaj zog (xws li rwb thaiv tsev nyob ze ntawm lub cav roj kab).
(2) Tus nqi siab dua li cov ntaub ntawv ib txwm muaj: Piv rau PVC thiab PE zoo tib yam, MPPE muaj cov txheej txheem hloov kho ntau dua thiab cov nqi raw khoom siab dua (kwv yees li 1.5-2 npaug ntawm PE zoo tib yam). Nyob rau hauv qis- qhov kawg rwb thaiv tsev cov xwm txheej nrog kev ua haujlwm qis dua (xws li cov xov hlau pej xeem zoo tib yam), qhov txiaj ntsig zoo ntawm tus nqi tsis pom tseeb.
6.Summary: Qhov tseem ceeb daim ntawv thov scenarios ntawm MPPE
Raws li cov yam ntxwv saum toj no, MPPE feem ntau yog siv rau hauv thaj chaw uas xav tau siab rau kev rwb thaiv tsev, huab cua tsis kam, thiab kev tiv thaiv ib puag ncig:
(1) Hlau thiab cable: rwb thaiv tsev txheej ntawm siab-voltage cable, hlau hlua rau lub zog tshiab tsheb (siab thiab tsis kub tsis kam + kev tiv thaiv ib puag ncig), photovoltaic cable (UV tsis kam + huab cua tsis kam), underwater cable (dej tsis kam).
(2) Cov khoom siv hluav taws xob: Transformer rwb thaiv tsev zaj duab xis, lub cev muaj zog ua hluav taws xob rwb thaiv tsev, hluav taws xob tiv thaiv vaj tse (kev rwb thaiv tsev + kub tsis kam).
(3) Tshwj xeeb teb: Rail transit cables (halogen{1}}dawb tsis muaj pa luam yeeb + huab cua resistant), aerospace lub teeb yuag rwb thaiv tsev Cheebtsam (lub teeb yuag + siab thiab kub tsis kam).
Zuag qhia tag nrho, MPPE yog cov khoom siv hluav taws xob hloov kho nrog "kev ua tau zoo sib luag thiab muaj zog ib puag ncig hloov tau", tshwj xeeb tshaj yog nyob rau hauv siab -kawg hluav taws xob rwb thaiv tsev xwm txheej, maj mam hloov cov tsoos PVC thiab PE zoo tib yam thiab dhau los ua ib qho kev xaiv tseem ceeb.
