Polyolefin zvinhu, zvinozivikanwa neakanakisa emagetsi zvimiro, processability, uye mashandiro ezvakatipoteredza, zvave imwe yeanonyanya kushandiswa ekudzivirira uye sheath zvinhu muwaya netambo indasitiri.
Polyolefins ndeyepamusoro-molecular-huremu mapolymers akagadzirwa kubva kuolefin monomers senge ethylene, propylene, uye butene. Iwo anoshandiswa zvakanyanya mumatambo, kurongedza, kuvaka, mota, uye maindasitiri ekurapa.
Mukugadzira tambo, polyolefin zvinhu zvinopa yakaderera dielectric kugara, yakakwirira insulation, uye yakasarudzika makemikari kuramba, kuve nechokwadi kugadzikana kwenguva refu uye kuchengetedzeka. Yavo halogen-isina uye inodzokororwa hunhu zvakare inopindirana nemaitiro emazuva ano mune yakasvibira uye inogoneka kugadzira.
I. Kurongwa neMonomer Type
1. Polyethylene (PE)
Polyethylene (PE) is thermoplastic resin polymerized kubva ethylene monomers uye ndeimwe yemapurasitiki anonyanya kushandiswa pasi rose. Kubva pane density uye mamorekuru chimiro, yakakamurwa kuita LDPE, HDPE, LLDPE, uye XLPE marudzi.
(1)Low-Density Polyethylene (LDPE)
Chimiro: Yakagadzirwa ne-high-pressure free-radical polymerization; ine macheni akawanda ane matavi, ane crystallinity ye55-65% uye density ye0.91–0.93 g/cm³.
Zvivakwa: Yakapfava, inoonekera, uye inoshingirira kurwisa asi ine mwero wekudzivirira kupisa (kusvika kunosvika 80 °C).
Zvishandiso: Inowanzo shandiswa seye sheath zvinhu zvekutaurirana uye masaini tambo, kuenzanisa kuchinjika uye insulation.
(2) High-Density Polyethylene (HDPE)
Chimiro: Polymerized pasi pekumanikidzwa kwakaderera neZiegler-Natta catalysts; ane mashoma kana asina matavi, yakakwirira crystallinity (80-95%), uye density ye0.94–0.96 g/cm³.
Zvivakwa: Kusimba kwepamusoro uye kusimba, kugadzikana kwakanaka kwekemikari, asi kuderera kushoma kwekushisa zvishoma.
Zvishandiso: Inoshandiswa zvakanyanya kumisikidza masisitimu, makonditi ekutaurirana, uye fiber optic tambo sheaths, inopa mamiriro ekunze epamusoro uye kudzivirira kwemuchina, kunyanya kuisirwa kunze kana pasi pevhu.
(3) Linear Low-Density Polyethylene (LLDPE)
Mamiriro: Copolymerized kubva ethylene uye α-olefin, ine short-chain branching; density iri pakati pe0.915–0.925 g/cm³.
Properties: Inosanganisa kuchinjika uye simba neakanakisa puncture kuramba.
Zvishandiso: Inokodzera sheath uye zvinhu zvekudzivirira mune yakaderera- uye yepakati-voltage tambo uye tambo dzekudzora, inosimudzira maitiro uye kubhenda kuramba.
(4)Cross-Yakabatanidzwa Polyethylene (XLPE)
Mamiriro: Matatu-dimensional network inoumbwa kuburikidza nemakemikari kana emuviri kuyambuka (silane, peroxide, kana electron-beam).
Properties: Kunyanya kupisa kupisa, kusimba kwemagetsi, kuvharwa kwemagetsi, uye mamiriro ekunze.
Zvishandiso: Inoshandiswa zvakanyanya mumatambo emagetsi epakati uye akakwira-voltage, tambo dzemagetsi matsva, uye tambo dzewaya dzemotokari - chinhu chinonyanya kushandiswa mukugadzira tambo dzemazuva ano.
2. Polypropylene (PP)
Polypropylene (PP), polymerized kubva kupropylene, ine density ye0.89–0.92 g/cm³, nzvimbo yakanyungudika ye164–176 °C, uye tembiricha yekushanda ye -30 °C kusvika 140 °C.
Properties: Huremu, yakakwirira mechanical simba, yakanakisa makemikari kuramba, uye yepamusoro yemagetsi insulation.
Zvishandiso: Inoshandiswa zvakanyanya seye halogen-isina insulation zvinhu mumatambo. Nekukura kwekusimbisa pakuchengetedzwa kwezvakatipoteredza, cross-linked polypropylene (XLPP) uye yakagadziridzwa copolymer PP iri kuwedzera kutsiva yechinyakare polyethylene mune yakakwirira-tembiricha uye yakakwirira-voltage tambo masisitimu, akadai senjanji, simba remhepo, uye tambo dzemotokari dzemagetsi.
3. Polybutylene (PB)
Polybutylene inosanganisira Poly (1-butene) (PB-1) uye Polyisobutylene (PIB).
Properties: Yakanakisa kupisa kupisa, kugadzikana kwekemikari, uye inokambaira kuramba.
Zvishandiso: PB-1 inoshandiswa mumapombi, mafirimu, uye kurongedza, nepo PIB inoshandiswa zvakanyanya mukugadzira tambo segeri rinovharira mvura, sealant, uye komputa yekuzadza nekuda kwekusapinda kwayo gasi uye makemikari inertness-inowanzo shandiswa mufiber optic tambo dzekuvhara uye kudzivirira unyoro.
II. Zvimwe Zvakajairwa Polyolefin Zvishandiso
(1) Ethylene-Vinyl Acetate Copolymer (EVA)
EVA inosanganisa ethylene uye vinyl acetate, inoratidzira kuchinjika uye kutonhora kuramba (inochengetedza kuchinjika pa -50 ° C).
Properties: Yakapfava, isingabatike, isina chepfu, uye isingachembera.
Zvishandiso: Mutambo, EVA inowanzoshandiswa seshanduko inogadziridza kana inotakura resin muLow Smoke Zero Halogen (LSZH) magadzirirwo, achivandudza kugadzikana kwekugadzirisa uye kuchinjika kwe eco-hushamwari insulation uye sheath zvinhu.
(2) Ultra-High-Molecular-Weight Polyethylene (UHMWPE)
Iine huremu hwemamorekuru hunodarika miriyoni 1.5, UHMWPE ipurasitiki yeinjiniya yepamusoro-tier.
Zvivakwa: Yepamusoro kupfeka kuramba pakati pemapurasitiki, simba rinokanganisa rakapetwa kashanu pane ABS, yakanakisa makemikari kuramba, uye yakaderera kunyorova.
Zvishandiso: Inoshandiswa mumagetsi emagetsi uye tambo dzakakosha seyepamusoro-kupfeka sheathing kana kupfekwa kwezvinhu zvinorema, zvinosimudzira kuramba kukuvadzwa kwemichina uye abrasion.
III. Mhedziso
Polyolefin zvinhu zvine halogen-isina, yakaderera-utsi, uye isina chepfu kana yapiswa. Ivo vanopa yakanakisa magetsi, mechaniki, uye kugadzikana kwekugadzirisa, uye kuita kwavo kunogona kuvandudzwa kuburikidza nekubatanidza, kusanganisa, uye crosslinking matekinoroji.
Nekubatanidzwa kwavo kwekuchengetedza, hushamwari hwezvakatipoteredza, uye kuita kwakavimbika, polyolefin zvinhu zvave musimboti wezvinhu muindasitiri yemazuva ano waya netambo. Tichitarisa kumberi, sezvikamu zvakaita semota nyowani dzesimba, mafotovoltaics, uye kufambiswa kwedata kuri kuramba kuchikura, hunyanzvi mumashandisirwo epololefin huchaenderera mberi nekufambisa kwepamusoro-soro uye kusimudzira kwakasimba kweindasitiri yematambo.
Nguva yekutumira: Oct-17-2025