Fluoroplastic high temp hluav taws xob xaim cablesyog cov ntaub ntawv tseem ceeb nyob rau hauv ib puag ncig hnyav xws li siab -rhiav kub, khoom siv hluav taws xob tshiab, aerospace, thiab kev tsim khoom semiconductor. Cov laj thawj feem ntau yog los ntawm ob lub ntsiab lus: kub tsis kam thiab tsis muaj nplaim taws. Ob lub zog no tsis yog kev tsim qauv tsim, tab sis ob qho kev tshwm sim ntawm tib lub qauv molecular, lub zog siab ntawm C-F daim ntawv cog lus, nyob rau hauv cov xwm txheej sib txawv.
lub super stability ntawm C-F daim ntawv cog lus
Qhov laj thawj yog vim li cas fluoroplastics (xws li PTFE, FEP, PFA, ETFE, thiab lwm yam) muaj cov khoom tshwj xeeb yog nyob rau hauv muaj cov pa roj carbon fluorine ntau (C-F) hauv lawv cov saw hlau tseem ceeb.
Lub zog ntawm daim ntawv cog lus ntawm C-F daim ntawv cog lus yog siab li 485 kJ / mol, ua rau nws yog ib qho ntawm cov tshuaj ruaj khov tshaj plaws nyob rau hauv cov organic compounds paub, deb tshaj C-H daim ntawv cog lus (kwv yees 413 kJ / mol) thiab C- Cl daim ntawv cog lus (kwv yees 339 kJ / mol) feem ntau pom hauv cov yas. Qhov no txhais tau tias:
- Kev rhuav tshem C-F daim ntawv cog lus yuav tsum tau siv zog ntau dua, thiab nws yog ib qho nyuaj rau lub thermal zog nyob rau hauv ib txwm high -kub ib puag ncig kom decompose nws;
- Fluorine atoms muaj lub vojvoog me me tab sis muaj zog electronegativity, nruj nreem qhwv nyob ib ncig ntawm sab nrauv ntawm cov saw hlau, tsim cov txheej txheem tiv thaiv ntxiv los tiv thaiv cov saw hlau sab hauv los ntawm oxidation thiab decomposition.
Yog li PTFE tuaj yeem ua haujlwm ntev ntawm 260 degree, tiv taus qhov kub siab dua rau lub sijhawm luv luv, thaum PVC cables zoo ib yam nyob ze rau lawv qhov kev txwv ntawm ib puag ncig 105 degree.
Kev sib raug zoo ntawm daim ntawv cog lus lub zog ntawm C-F daim ntawv cog lus thiab kub kub ua haujlwm
Nws yog kev sib xyaw ua ke ntawm cov txheej txheem no uas ua rau muaj qhov kub thiab txias tiv taus cable ua los ntawm fluoroplastics kom ua haujlwm ruaj khov rau lub sijhawm ntev hauv kev ua haujlwm hnyav.
High thermal decomposition kub
Lub thermal decomposition kub ntawm fluoroplastics feem ntau yog siab tshaj 400℃(PTFE tuaj yeem ncav cuag li 500 degree), deb tshaj qhov ntsuas kub ntawm feem ntau cov xwm txheej. Yog li ntawd, cov khoom degradation, brittleness, los yog cracking yuav tsis tshwm sim thaum lub sij hawm ntev -lub sij hawm siab - kub ua hauj lwm.
Highly symmetrical molecular qauv thiab siab crystallinity
Siv PTFE ua piv txwv, nws cov saw hlau molecular muaj cov qauv zoo sib xws nrog cov crystallinity ntau dua 90%. Cov txheej txheem nruj nreem crystalline no txhim khu kev sib cuam tshuam ntawm cov saw hlau molecular, thiab cov khoom siv tuaj yeem tswj cov khoom siv dag zog zoo thiab qhov ruaj khov ntawm qhov kub thiab txias, ua rau nws tsis tshua muaj softening thiab deformation.
Tsawg molecular saw kev ua haujlwm
Fluoroplastic molecular chains yog hloov tau, tab sis ruaj khov heev, thiab txawm tias nyob rau hauv ib puag ncig uas muaj qhov kub thiab txias hloov pauv (xws li rov hloov dua ntawm -200℃thiab 260 degree), cov khoom tseem tuaj yeem ua kom ruaj khov hluav taws xob thiab cov khoom siv kho tshuab. Qhov no kuj yog vim li cas qhov xwm txheej kub ntxhov xws li aerospace thiab nuclear zog nyiam fluoroplastic cables.
Qhov hluav taws kub retardancy tuaj qhov twg?
Cov nplaim retardancy ntawm fluoroplastic cables tsis cia siab rau sab nraud nplaim retardants, tab sis nyob rau ntawm "tus kheej nplaim retardant" yam ntxwv ntawm cov khoom nws tus kheej:
Tsis tshua muaj siab Limiting Oxygen Index (LOI)
Qhov kawg oxygen Performance index ntawm PTFE yog tshaj 95, deb tshaj 21% cov ntsiab lus oxygen hauv huab cua zoo tib yam. Cias muab tso, nyob rau hauv ib txwm atmospheric tej yam kev mob, PTFE yog ib qho nyuaj ignited vim hais tias cov pa concentration yuav tsum tau los tswj combustion yog ntau dua li tej yam ntuj tso ib puag ncig yuav muab tau.
Tsis muaj cov tee dej yog tsim thaum lub sij hawm combustion, thiab nws tsis txhawb combustion
Ntau cov plastics yaj thiab drips thaum lub sij hawm combustion, ua rau hluav taws kis tau (lub npe hu ua "droplet effect"). Txawm hais tias fluoroplastics decompose nyob rau hauv qhov kub thiab txias, lawv tsuas yog undergo gasification, uas ua rau nws nyuaj rau tsim cov tee dej thiab splashes, zoo heev txo qhov kev pheej hmoo ntawm hluav taws.
Cov khoom decomposition muaj peev xwm ua rau nws tus kheej inhibit combustion
Thaum cov fluoroplastics decompose ntawm qhov kub siab heev (ntau tshaj lawv qhov kev khiav hauj lwm kub), lawv tso fluorine - muaj roj. Cov pa roj no yuav dilute cov pa oxygen hauv zos, tsim ib qho kev tua tus kheej, uas kuj yog ib qho ntawm cov cuab yeej pabcuam ntawm lawv cov nplaim hluav taws xob ua haujlwm (ceeb toom: cov pa roj decomposed yog khaus, yog li kev tiv thaiv kub thiab cua ntsuas tseem yuav tsum tau ua nyob rau hauv cov tswv yim engineering, tsis yog "kev nyab xeeb thiab tsis muaj mob").
Tsis tso siab rau cov nplaim hluav taws kub retardants, ntev - kev ua tau zoo yog ruaj khov dua
Cov nplaim hluav taws zoo tib yam- cov kab hluav taws xob feem ntau ua tiav cov nplaim hluav taws xob los ntawm kev ntxiv bromine raws, phosphorus raws li, thiab lwm yam nplaim hluav taws, tab sis cov additives muaj kev pheej hmoo ntawm kev tsiv teb tsaws, kev laus, thiab tsis ua haujlwm. Cov nplaim hluav taws kub nyhiab ntawm fluoroplastics yog los ntawm cov qauv tsim ntawm cov khoom thiab tsis lwj thaum lub sij hawm, uas kuj yog ib qho tseem ceeb vim li cas lawv nyiam nyob rau hauv ntev - khoom siv lub neej.
Lwm qhov zoo
Nws tsim nyog hais tias qhov kev ruaj ntseg coj los ntawm C-F daim ntawv cog lus kuj ua rau muaj lwm yam zoo ntawm fluoroplastic siab kub resistant cable. Cov yam ntxwv no feem ntau ua haujlwm sib koom ua ke nrog siab - qhov kub thiab txias tsis kam, ua rau qhov kub kub hluav taws xob hlau sib tw hauv ntau yam xwm txheej:
- Cov tshuaj tiv thaiv corrosion zoo heev: tsis tshua muaj zog nrog cov kua qaub, cov hauv paus, thiab cov kuab tshuaj organic;
- Tsis tshua muaj kev sib txhuam coefficient: yooj yim rau cov yeeb nkab threading thiab thaiv kev tsim kho;
- Kev ua tau zoo ntawm hluav taws xob rwb thaiv tsev: muaj peev xwm tswj tau lub zog dielectric ruaj khov ntawm qhov kub thiab txias, haum rau siab - zaus thiab siab - voltage scenarios;
- Muaj zog tiv thaiv huab cua thiab hluav taws xob tiv thaiv: haum rau ntev - lub sij hawm raug ib puag ncig xws li sab nraum zoov photovoltaics thiab nuclear zog.
Qhov kub thiab txias tsis kam thiab nplaim retardancy ntawm fluoroplastic xov hlau thiab cables yog qhov tseem ceeb ntawm "natural tshwm sim" ntawm lub zog ruaj khov ntawm C-F daim ntawv cog lus nyob rau hauv lawv cov qauv molecular, es tsis txhob cia siab rau tom qab additives "stacking". Qhov no kuj yog vim li cas hauv thaj chaw xws li lub zog tshiab, semiconductors, aerospace, thiab nuclear fais fab uas yuav tsum tau muaj kev nyab xeeb siab heev thiab ntev - lub sij hawm cia siab rau, raws li ib txwm.kub resistant cable, fluoroplastic cables yeej ib txwm yog qhov kev xaiv zoo tshaj plaws rau cov engineers.
Yog koj xaivhigh temp hluav taws xob hlaucables rau tej yaam num uas kub siab los yog hluav taws kub tiv thaiv yuav tsum tau, thov sab laj nrog peb cov kev pab tswv yim rau kev xaiv ntxiv tswv yim raws li cov kev ua hauj lwm tej yam kev mob.
