Polyolefin cov ntaub ntawv, paub txog lawv cov khoom siv hluav taws xob zoo, kev ua tau zoo, thiab kev ua haujlwm ib puag ncig, tau dhau los ua ib qho ntawm cov khoom siv rwb thaiv tsev thiab cov ntaub qhwv hauv kev lag luam hlau thiab cable.
Polyolefins yog cov polymers siab molecular-yuag polymers tsim los ntawm olefin monomers xws li ethylene, propylene, thiab butene. Lawv tau siv dav hauv cables, ntim khoom, kev tsim kho, tsheb, thiab kev kho mob kev lag luam.
Hauv kev tsim cov kab hluav taws xob, cov khoom siv polyolefin muaj qhov tsis tshua muaj hluav taws xob tsis tu ncua, kev rwb thaiv tsev zoo dua, thiab cov tshuaj tiv thaiv zoo heev, ua kom muaj kev ruaj ntseg ntev thiab kev nyab xeeb. Lawv cov yam ntxwv tsis muaj halogen thiab rov ua dua tshiab kuj ua raws li cov qauv niaj hnub no hauv kev tsim ntsuab thiab kev tsim khoom ruaj khov.
I. Kev faib tawm los ntawm hom Monomer
1. Polyethylene (PE)
Polyethylene (PE) yog ib qho thermoplastic resin polymerized los ntawm ethylene monomers thiab yog ib qho ntawm cov yas siv thoob plaws ntiaj teb. Raws li qhov ceev thiab molecular qauv, nws muab faib ua LDPE, HDPE, LLDPE, thiab XLPE hom.
(1)Tsawg-Density Polyethylene (LDPE)
Qauv: Ua los ntawm high-pressure dawb-radical polymerization; Muaj ntau cov ceg ntoo, nrog cov crystallinity ntawm 55-65% thiab qhov ceev ntawm 0.91-0.93 g / cm³.
Khoom: Mos, pob tshab, thiab kev cuam tshuam-tiv taus tab sis muaj cua sov tsis zoo (txog li 80 ° C).
Daim ntaub ntawv: Feem ntau siv los ua cov ntaub qhwv rau kev sib txuas lus thiab cov teeb liab cables, ntsuas qhov yooj yim thiab rwb thaiv tsev.
(2) High-Density Polyethylene (HDPE)
Qauv: Polymerized nyob rau hauv qis qis nrog Ziegler-Natta catalysts; muaj tsawg los yog tsis muaj ceg, siab crystallinity (80-95%), thiab ceev ntawm 0.94-0.96 g / cm³.
Khoom: Lub zog thiab rigidity, zoo heev tshuaj stability, tab sis me ntsis txo qis-kub toughness.
Daim ntaub ntawv: dav siv rau rwb thaiv tsev txheej, kev sib txuas lus conduits, thiab fiber optic cable sheaths, muab superior huab cua thiab mechanical tiv thaiv, tshwj xeeb tshaj yog rau sab nraum zoov los yog underground installation.
(3) Linear Low-Density Polyethylene (LLDPE)
Structure: Copolymerized los ntawm ethylene thiab α-olefin, nrog luv-chain branching; Qhov ceev ntawm 0.915-0.925 g / cm³.
Properties: Combines yooj thiab lub zog nrog zoo heev puncture kuj.
Daim ntaub ntawv: Haum rau cov ntaub qhwv thiab rwb thaiv tsev nyob rau hauv qis- thiab nruab nrab-voltage cables thiab tswj cables, pab txhawb kev cuam tshuam thiab khoov tsis kam.
(4)Hla-Txuas Polyethylene (XLPE)
Structure: Peb-dimensional network tsim los ntawm tshuaj lom neeg lossis lub cev sib txuas (silane, peroxide, lossis electron-beam).
Khoom: Zoo heev thermal kuj, mechanical zog, hluav taws xob rwb thaiv tsev, thiab weatherability.
Daim ntaub ntawv: Feem ntau siv nyob rau hauv nruab nrab- thiab high-voltage fais fab cables, tshiab zog cables, thiab tsheb wiring harnesses — ib tug mainstream rwb thaiv tsev cov ntaub ntawv nyob rau hauv niaj hnub cable manufacturing.
2. Polypropylene (PP)
Polypropylene (PP), polymerized los ntawm propylene, muaj qhov ceev ntawm 0.89-0.92 g / cm³, melting point ntawm 164-176 ° C, thiab kev khiav hauj lwm kub ntawm -30 ° C mus rau 140 ° C.
Cov khoom siv: Lub teeb yuag, siab txhua yam muaj zog, tshuaj lom neeg ua haujlwm zoo, thiab zoo dua hluav taws xob rwb thaiv tsev.
Daim ntaub ntawv: Siv feem ntau ua cov khoom siv hluav taws xob tsis muaj halogen hauv cov cables. Nrog rau kev loj hlob ntawm kev tiv thaiv ib puag ncig, cross-linked polypropylene (XLPP) thiab hloov pauv copolymer PP tau nce ntxiv hloov cov tshuaj polyethylene hauv cov kab hluav taws xob kub thiab hluav taws xob, xws li kev tsheb ciav hlau, cua fais fab, thiab hluav taws xob tsheb cables.
3. Polybutylene (PB)
Polybutylene muaj xws li Poly (1-butene) (PB-1) thiab Polyisobutylene (PIB).
Properties: Zoo heev tshav kub tsis kam, tshuaj stability, thiab creep kuj.
Daim ntaub ntawv: PB-1 yog siv rau hauv cov kav dej, cov yeeb yaj kiab, thiab ntim khoom, thaum PIB tau siv dav hauv kev tsim cov cable raws li cov dej thaiv cov gel, sealant, thiab filling compound vim nws cov roj impermeability thiab tshuaj inertness-feem ntau siv hauv fiber ntau cables rau sealing thiab tiv thaiv ya raws.
II. Lwm Cov Khoom Siv Polyolefin
(1) Ethylene-Vinyl Acetate Copolymer (EVA)
EVA ua ke ethylene thiab yas acetate, featuring saj zawg zog thiab txias tsis kam (tso yooj yim ntawm -50 ° C).
Properties: Mos, cuam tshuam-resistant, non-toxic, thiab aging-resistant.
Daim ntaub ntawv: Hauv cov cables, EVA feem ntau yog siv los ua qhov hloov pauv hloov pauv lossis cov khoom thauj khoom hauv cov qauv siv hluav taws xob qis qis Halogen (LSZH), txhim kho kev ua haujlwm ruaj khov thiab yooj yim ntawm eco-phooj ywg rwb thaiv tsev thiab cov ntaub ntawv sheath.
(2) Ultra-High-Molecular-Weight Polyethylene (UHMWPE)
Nrog rau qhov hnyav molecular ntau tshaj 1.5 lab, UHMWPE yog cov khoom siv yas sab saum toj.
Cov Khoom Siv: Cov khoom siv siab tshaj plaws ntawm cov yas, cuam tshuam lub zog tsib zaug ntau dua li ABS, cov tshuaj tiv thaiv zoo heev, thiab nqus dej tsawg.
Daim ntaub ntawv: Siv nyob rau hauv optical cables thiab tshwj xeeb cables raws li high-hnav sheathing los yog txheej rau tensile ntsiab, pab tiv thaiv txhua yam kev puas tsuaj thiab puas.
III. Xaus
Polyolefin cov ntaub ntawv tsis muaj halogen, tsis muaj pa luam yeeb, thiab tsis muaj tshuaj lom thaum hlawv. Lawv muab cov khoom siv hluav taws xob zoo, kev siv tshuab, thiab kev ua haujlwm ruaj khov, thiab lawv cov kev ua tau zoo tuaj yeem txhim kho ntxiv los ntawm kev sib txuas, sib xyaw, thiab kev sib txuas thev naus laus zis.
Nrog rau kev sib xyaw ua ke ntawm kev nyab xeeb, kev phooj ywg ib puag ncig, thiab kev ua tau zoo, cov ntaub ntawv polyolefin tau dhau los ua cov khoom siv tseem ceeb hauv kev lag luam hlau niaj hnub thiab cable. Saib tom ntej, raws li cov haujlwm zoo li lub zog tshiab tsheb, photovoltaics, thiab cov ntaub ntawv kev sib txuas lus txuas ntxiv mus ntxiv, kev tsim kho tshiab hauv cov ntawv thov polyolefin yuav ntxiv dag zog rau kev ua haujlwm siab thiab kev loj hlob ntawm kev lag luam cable.
Post lub sij hawm: Oct-17-2025