I-sheath okanye i-sheath yangaphandle ngumaleko ongaphandle okhuselayo kwisakhiwo sentambo ye-optical, eyenziwe ngokukodwa nge-PE sheath material kunye ne-PVC ye-sheath material, kunye ne-halogen-free-flame-retardant material ye-sheath kunye ne-electric tracking sheath material isetyenziswa kwizihlandlo ezikhethekileyo.
1. Izinto ze-PE sheath
I-PE sisishunqulelo se-polyethylene, i-polymer compound eyenziwe yi-polymerization ye-ethylene. Izinto ezimnyama ze-polyethylene sheath zenziwe ngokuxuba ngokulinganayo kunye ne-granulating polyethylene resin kunye ne-stabilizer, i-carbon black, i-antioxidant kunye ne-plasticizer kwinqanaba elithile. Izinto ze-polyethylene sheath ye-optical cable sheaths zinokwahlulwa zibe yi-polyethylene ephantsi (LDPE), i-linear low-density polyethylene (LLDPE), i-polyethylene ephakathi (MDPE) kunye ne-polyethylene ephezulu (i-HDPE) ngokobuninzi. Ngenxa yokuxinana kwazo ezahlukeneyo kunye nezakhiwo zeemolekyuli, zineempawu ezahlukeneyo. I-polyethylene ephantsi, eyaziwa ngokuba yi-high-pressure polyethylene, yenziwe nge-copolymerization ye-ethylene kuxinzelelo oluphezulu (ngaphezu kwe-1500 atmospheres) kwi-200-300 ° C kunye ne-oxygen njenge-catalyst. Ngoko ke, i-molecular chain ye-polyethylene ephantsi iqulethe amasebe amaninzi obude obuhlukeneyo, kunye nenqanaba eliphezulu le-chain chain branching, isakhiwo esingaqhelekanga, i-crystallinity ephantsi, kunye nokuguquguquka okulungileyo kunye nobude. I-polyethylene ephezulu, eyaziwa ngokuba yi-polyethylene ephantsi, yenziwe nge-polymerization ye-ethylene kuxinzelelo oluphantsi (i-1-5 atmospheres) kunye ne-60-80 ° C kunye ne-aluminium kunye ne-titanium catalysts. Ngenxa yokusabalalisa ubunzima be-molecular of high-density polyethylene kunye nokulungelelaniswa okucwangcisiweyo kweeamolekyu, ineempawu ezintle zomatshini, ukuchasana kweekhemikhali okulungileyo kunye noluhlu olubanzi lobushushu bokusetyenziswa. Izinto eziphathekayo ze-polyethylene sheath ze-Medium-density zenziwa ngokuxuba i-polyethylene ephezulu kunye ne-polyethylene ephantsi kwe-low density kwi-proportion efanelekileyo, okanye nge-polymerizing ethylene monomer kunye ne-propylene (okanye i-monomer yesibini ye-1-butene). Ngoko ke, ukusebenza kwe-polyethylene yoxinaniso oluphakathi kuphakathi kwe-polyethylene ephezulu kunye ne-low-density polyethylene, kwaye inokumbini ukuguquguquka kwe-polyethylene ephantsi kunye nokugqwesa okugqwesileyo kunye nokuqina kokuqina kwe-polyethylene ephezulu. I-Polyethylene ephantsi yoxinaniso olusezantsi luyipolymerized ngesigaba segesi soxinzelelo oluphantsi okanye indlela yesisombululo kunye ne-ethylene monomer kunye ne-2-olefin. Idigri ye-branching ye-linear low-density polyethylene iphakathi koxinano oluphantsi kunye noxinaniso oluphezulu, ngoko inokumelana noxinzelelo olubalaseleyo lokusingqongileyo. Ukuchasana nokuqhekeka koxinzelelo lwendalo sisalathisi esibaluleke kakhulu ekuchongeni umgangatho wezinto zePE. Ibhekisa kwinto yokuba isiqwenga sovavanyo lwemathiriyeli siphantsi koxinzelelo lokugoba iintanda kwindawo ye-surfactant. Izinto ezichaphazela ukuphazamiseka kwengcinezelo yezinto eziphathekayo zibandakanya: ubunzima be-molecular, ukusabalalisa ubunzima be-molecular, crystallinity, kunye ne-microstructure ye-molecular chain. Okukhona ubukhulu bemolekyuli buba bukhulu, kokukhona bucutheka ukwabiwa kobunzima bemolekyuli, kokukhona uqhagamshelo phakathi kweewafers, kokukhona ukuxhathisa kokuqhekeka koxinzelelo lwendalo kokusingqongileyo, kwaye kokukhona ubomi benkonzo bezinto eziphathekayo bubude; ngelo xesha, i-crystallization yezinto eziphathekayo nayo ichaphazela esi sibonakaliso. I-crystallinity ephantsi, ingcono ukunyanzeliswa koxinzelelo lokusingqongileyo kwizinto eziphathekayo. Amandla okuqina kunye nobude bekhefu lezinto ze-PE sesinye isalathisi sokulinganisa ukusebenza kwezinto, kwaye sinokuxela kwangaphambili isiphelo sokusetyenziswa kwezinto. Umxholo wekhabhoni kwizinto ze-PE unokuxhathisa ngokufanelekileyo ukukhukuliseka kwemisebe ye-ultraviolet kwizinto eziphathekayo, kwaye i-antioxidants inokuphucula ngokufanelekileyo i-antioxidant properties.
2. PVC sheath impahla
Izinto ezibuyisela idangatye le-PVC ziqulethe iiathom zeklorini, eziya kutshisa kwidangatye. Xa utshisa, uya kubola kwaye ukhulule inani elikhulu legesi ye-HCL enobungozi kunye netyhefu, eya kubangela ingozi yesibini, kodwa iya kuzicima ngokwayo xa ishiya ilangatye, ngoko inophawu lokungasasazi ilangatye; kwangaxeshanye, PVC esingxotyeni impahla ine bhetyebhetye elungileyo kunye nokwandiswa, kwaye ngokubanzi isetyenziswa kwiintambo zangaphakathi optical.
3. Isixhobo se-sheath esingenayo i-halogen-free flame retardant
Ekubeni i-polyvinyl chloride iya kuvelisa iigesi ezinetyhefu xa isitsha, abantu baye baphuhlisa umsi ophantsi, i-halogen-free, i-non-toxic, i-sheath ecocekileyo ye-flame retardant material, oko kukuthi, ukongeza i-inorganic flame retardants i-Al (OH) 3 kunye ne-Mg (OH) 2 kwizinto eziqhelekileyo ze-sheath, eziza kukhulula amanzi ekristale xa zidibana nomlilo kwaye zifunxe ubushushu obuninzi, ngaloo ndlela kuthintela ubushushu bezinto ze-sheath ekukhuphukeni kunye nokuthintela ukutsha. Kuba iiretardants ze-inorganic flame zongezwa kwi-halogen-free flame retardant sheath materials, ukuqhutywa kweepolymers kuya kwanda. Kwangaxeshanye, iiresin kunye ne-inorganic flame retardants zihluke ngokupheleleyo kwizinto ezimbini. Ngethuba lokucutshungulwa, kuyimfuneko ukukhusela ukuxuba okungalinganiyo kwee-flame retardants zendawo. Iinorganic flame retardants kufuneka zongezwe ngokwexabiso elifanelekileyo. Ukuba umlinganiselo ukhulu kakhulu, amandla omatshini kunye nokwandiswa kwekhefu lezinto eziphathekayo kuya kuncitshiswa kakhulu. Iimpawu zokuvavanya iipropathi ze-flame retardant ze-halogen-free flame retardants zisalathiso se-oksijini kunye noxinzelelo lomsi. Isalathiso se-oksijini yimxinano encinci ye-oksijeni efunekayo kwizinto eziphathekayo ukugcina ukutsha okulinganayo kwigesi edibeneyo ye-oksijeni kunye ne-nitrogen. Ubukhulu besalathiso se-oksijini, ngcono iipropati ze-flame retardant zezinto. Umsi womsi ubalwa ngokulinganisa ukuhanjiswa kwe-parallel light beam edlula umsi owenziwe ngokutshiswa kwezinto kwindawo ethile kunye nobude bendlela ye-optical. Okukhona umsi womsi usezantsi, kokukhona umsi wokukhupha umsi usezantsi kwaye kokukhona kuphucuka ukusebenza kwezinto.
4. Imathiriyeli ye-sheath eneempawu zombane
Zininzi nangakumbi i-All-media self-supporting cable cable (ADSS) elele kwinqaba enye enemigca ephezulu yombane ophezulu kwinkqubo yonxibelelwano lwamandla. Ukuze boyise impembelelo yombane wokufakelwa kwamandla ombane aphezulu kwi-sheath yekhebula, abantu baye baphuhlisa kwaye bavelisa isixhobo esitsha sombane esinganyangekiyo se-sheath, impahla ye-sheath ngokulawula ngokungqongqo umxholo wekhabhoni emnyama, ubungakanani kunye nokuhanjiswa kwamasuntswana amnyama ekhabhoni. , ukongeza izongezo ezikhethekileyo ukwenza i-sheath material inomsebenzi ogqwesileyo wokumelana nesiva sombane.
Ixesha lokuposa: Aug-26-2024