Nrog rau kev txhim kho cov nplaim hluav taws xob hluav taws xob rau cov khoom siv cable, hom tshiab ntawm cov nplaim hluav taws xob hluav taws xob tau tshwm sim tsis tu ncua, hloov zuj zus los ntawm cov hluav taws xob hluav taws xob zoo tib yam rau cov pa hluav taws xob tsawg-halogen nplaim hluav taws xob hluav taws xob thiab cov pa taws tsawg halogen-dawb nplaim hluav taws xob retardant cables. . Qhov no qhia tau hais tias cov kev cai rau cov nplaim hluav taws xob cables tau nce siab thiab siab dua nyob rau xyoo tas los no.
Hauv cov tebchaws xws li Tebchaws Europe, Tebchaws Meskas, thiab Nyij Pooj, ib puag ncig tus phooj ywg xaim thiab cov khoom siv cable tau dhau los ua qhov tseem ceeb ntawm txhua hom cable. Tsoom fwv nruj me ntsis txwv tsis pub siv lossis ntshuam ntawm cov kab hluav taws xob tsis zoo rau ib puag ncig. Ordinary nplaim retardant cov ntaub ntawv muaj ib tug loj npaum li cas ntawm halogen. Thaum kub hnyiab, lawv yuav tsim cov pa taws ntau thiab cov pa phem corrosive hydrogen halide gas. Halogen-dawb nplaim retardancy yog ua tiav hauv polyolefins. Yog li ntawd, tsis tshua muaj pa halogen-free cables yuav yog lub ntsiab kev loj hlob qauv yav tom ntej. Yog li, extrusion ntawm cov khoom siv hluav taws xob tsis muaj pa halogen-free yuav tau tham los ntawm cov hauv qab no.
- Khoom siv Extrusion
A. Cov khoom tseem ceeb ntawm cov khoom siv hlau thiab cable extrusion yog cov ntsia hlau, uas muaj feem xyuam rau kev siv ntau yam thiab kev ua haujlwm ntawm extruder. Txhawm rau ua kom tau raws li qhov xav tau ntawm kev ua cov yas sib txawv, muaj ntau hom ntsia hlau tsim. Cov khoom siv hluav taws xob tsis tshua muaj hluav taws xob halogen tsis muaj hluav taws xob muaj cov khoom siv magnesium hydroxide lossis txhuas hydroxide. Yog li ntawd, rau kev xaiv cov ntsia hlau, cov ntsia hlau zoo tib yam feem ntau yog siv, thiab lawv cov compression ratios yuav tsum tsis txhob loj heev, feem ntau ntawm 1: 1 thiab 1: 2.5 yog qhov tsim nyog.
B. Lwm qhov tseem ceeb cuam tshuam rau extrusion ntawm cov khoom siv hluav taws xob tsawg-tsim halogen-free cable thaum lub sij hawm extrusion txheej txheem yog cov khoom cua txias ntawm extruder. Vim muaj qhov tshwj xeeb ntawm cov khoom siv tsis muaj pa halogen tsawg, cov cua kub ntau yog tsim los ntawm kev sib txhuam thaum lub sij hawm extrusion txheej txheem. Qhov no yuav tsum tau hais tias cov khoom siv extrusion muaj cov cuab yeej cua txias zoo los tswj cov txheej txheem kub. Qhov no yog ib qho teeb meem uas tsis tuaj yeem tsis quav ntsej. Yog tias qhov kub thiab txias heev, qhov pores loj yuav raug tsim rau ntawm qhov chaw ntawm lub cable; yog tias qhov kub thiab txias qis dhau lawm, tag nrho cov khoom siv tam sim no yuav nce ntxiv, thiab cov khoom siv yuav raug puas tsuaj. - Extrusion pwm
Vim tias cov khoom ntim siab hauv cov khoom siv hluav taws xob tsis muaj pa halogen-dawb, muaj qhov sib txawv tseem ceeb hauv lub zog yaj, kos piv, thiab viscosity ntawm nws thiab lwm yam khoom siv cable hauv lub xeev molten. Yog li ntawd, kev xaiv cov pwm kuj txawv. Ua ntej, nyob rau hauv kev xaiv ntawm extrusion txoj kev ntawm pwm. Rau extrusion ntawm cov khoom siv hluav taws xob tsis muaj pa halogen-dawb, cov pwm extrusion rau rwb thaiv tsev yuav tsum yog hom extrusion, thiab thaum lub sij hawm extrusion ntawm sheath, yuav tsum tau siv semi-extrusion hom. Tsuas yog nyob rau hauv txoj kev no tuaj yeem ua lub zog tensile, elongation, thiab nto tiav ntawm cov khoom yuav lav tag nrho. Thib ob, hauv kev xaiv ntawm lub tes tsho tuag. Thaum siv cov pwm extrusion, vim muaj cov viscosity siab ntawm cov khoom, lub siab ntawm lub taub hau tuag yog loj, thiab cov khoom yuav nthuav thaum nws tawm ntawm pwm. Yog li ntawd, lub tes tsho tuag yuav tsum me ntsis me dua qhov loj me. Thaum kawg, cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tsis muaj pa halogen tsis zoo dua li cov khoom siv hluav taws xob zoo tib yam thiab cov khoom siv hluav taws xob tsawg-halogen tsawg. Nws qhov sib piv yog me me, tsuas yog li 2.5 txog 3.2. Yog li ntawd, thaum xaiv cov pwm, nws cov duab kos yuav tsum tau txiav txim siab tag nrho. Qhov no yuav tsum tau xaiv thiab sib txuam ntawm lub tes tsho tuag yuav tsum tsis txhob loj dhau, txwv tsis pub lub nto ntawm lub cable yuav tsis ntom, thiab cov txheej extrusion yuav xoob.
Ib qho ntxiv: Lub cev muaj zog ntawm lub tshuab tseem ceeb yuav tsum loj txaus. Vim yog cov viscosity siab ntawm LSHF cov ntaub ntawv, lub zog tsis txaus yuav tsis ua haujlwm.
Ib qho kev tsis sib haum xeeb: Qhov ntev ntawm qhov chaw seem ntawm cov pwm extrusion yuav tsum tsis txhob ntev dhau, feem ntau tsawg dua 1 hli. Yog tias nws ntev dhau lawm, lub zog shear yuav loj dhau.- Rau cov ntaub ntawv tsis muaj halogen, siv cov ntsia hlau nrog qhov sib piv qis rau kev ua haujlwm zoo. (Qhov sib piv loj compression yuav ua rau muaj cua sov loj sab hauv thiab sab nraud ntawm cov yas, thiab qhov sib piv loj-rau-inch yuav ua rau lub sijhawm cua sov ntev rau cov yas.)
- Vim tias qhov sib ntxiv ntawm cov nplaim hluav taws ntau ntau hauv cov khoom siv hluav taws xob tsawg halogen-dawb, muaj teeb meem loj hauv cov txheej txheem extrusion. Lub zog shear ntawm cov ntsia hlau ntawm cov khoom tsis muaj halogen yog qhov loj. Txoj kev zoo tshaj plaws tam sim no yog siv cov ntsia hlau tshwj xeeb extrusion rau cov khoom tsis muaj halogen.
- Thaum lub sij hawm extrusion, ib yam khoom zoo li qhov muag tawm tshwm rau ntawm qhov qhib qhov tuag. Thaum muaj ntau ntawm nws, nws yuav txuas rau cov hlau thiab tsim cov khoom me me, cuam tshuam rau nws cov tsos. Koj puas tau ntsib qhov no? Koj puas muaj cov kev daws teeb meem zoo? Nws yog ib tug precipitate txuas mus rau sab nraud tuag qhib. Txo qhov kub ntawm qhov qhib qhov tuag thiab kho cov pwm kom muaj me ntsis stretching yuav txhim kho qhov teeb meem ntau. Kuv kuj feem ntau ntsib qhov teeb meem no thiab tsis tau pom ib qho kev daws teeb meem. Kuv xav tias nws yog tshwm sim los ntawm qhov tsis zoo sib xws ntawm cov khoom siv. Nws tau hais tias siv lub tshuab hluav taws xob los ci nws tuaj yeem ua haujlwm, tab sis qhov kub thiab txias yuav tsum tsis txhob siab dhau, txwv tsis pub cov rwb thaiv tsev yuav puas. Yog hais tias qhov kub ntawm lub taub hau tuag yog siab, txo qhov kub me ntsis yuav daws tau qhov teeb meem. Muaj ob txoj kev daws teeb meem rau qhov teeb meem no: 1) Siv rab phom cua los tshuab, nyiam dua nrog cua kub; 2) Hloov cov qauv tsim pwm los ntawm kev ua ib qho me me ntawm qhov qhib qhov tuag. Qhov siab ntawm protrusion feem ntau yog li 1 hli. Tab sis kuv tsis paub yog tias muaj cov tuam txhab tsim khoom lag luam uas tuaj yeem ua cov pwm zoo li no. Rau qhov teeb meem ntawm precipitates ntawm qhov tuag qhib thaum lub sij hawm extrusion ntawm tsawg-tsim halogen-dawb cov ntaub ntawv, txhim kho ib tug kub-cua slag tshem tawm ntaus ntawv ntawm lub tuag qhib yuav daws tau qhov teeb meem no. Peb lub tuam txhab tam sim no siv txoj kev no, thiab cov nyhuv zoo heev.
Ib qho ntxiv: Thaum tsim cov khoom siv hluav taws xob tsis muaj pa halogen, nws yog qhov zoo tshaj plaws los siv cov khoom siv semi-tubular extrusion pwm rau tubular extrusion. Tsis tas li ntawd, qhov ua tiav ntawm cov pwm yuav tsum siab kom tsis txhob muaj qhov muag tawm zoo li tso rau ntawm qhov qhib tuag. - Nqe Lus Nug: Thaum tsim cov khoom siv hluav taws xob tsis muaj pa halogen tsis tshua muaj tam sim no, qhov kub ntawm thaj tsam plaub ntawm lub thoob yuav nce ntxiv. Tom qab qhov ceev tau nce, qhov kub yuav nce li ntawm 40 degrees, ua rau cov khoom ua npuas ncauj. Puas muaj cov kev daws teeb meem zoo? Rau qhov tshwm sim ntawm cov npuas tshwm sim thaum lub sij hawm extrusion ntawm cov khoom siv hluav taws xob tsawg halogen-dawb, raws li kev tsom xam: Ib qho yog tias cov khoom siv tsis muaj pa halogen tsawg tau yooj yim cuam tshuam los ntawm kev ya raws. Ua ntej extrusion, nws yog qhov zoo tshaj los ua kev kho kom qhuav; Qhov thib ob yog tias kev tswj qhov kub thiab txias thaum lub sij hawm extrusion txheej txheem yuav tsum tsim nyog. Lub zog shear ntawm halogen-dawb cov ntaub ntawv thaum lub sij hawm extrusion txheej txheem yog loj, thiab ntuj cua sov yuav raug generated ntawm lub chim thiab cov ntsia hlau. Nws raug pom zoo kom txo qis qhov ntsuas kub; Peb yog vim li cas qhov zoo ntawm cov khoom nws tus kheej. Ntau cov khoom siv cable tsuas yog ntxiv cov khoom ntim loj kom txo tau cov nqi, uas ua rau cov khoom siv ntau dhau ntawm lub ntiajteb txawj nqus. Rau qhov tshwm sim ntawm cov npuas tshwm sim thaum lub sij hawm extrusion ntawm cov khoom siv hluav taws xob tsawg halogen-dawb, raws li kev tsom xam: Ib qho yog tias cov khoom siv tsis muaj pa halogen tsawg tau yooj yim cuam tshuam los ntawm kev ya raws. Ua ntej extrusion, nws yog qhov zoo tshaj los ua kev kho kom qhuav; Qhov thib ob yog tias kev tswj qhov kub thiab txias thaum lub sij hawm extrusion txheej txheem yuav tsum tsim nyog. Lub zog shear ntawm halogen-dawb cov ntaub ntawv thaum lub sij hawm extrusion txheej txheem yog loj, thiab ntuj cua sov yuav raug generated ntawm lub chim thiab cov ntsia hlau. Nws raug pom zoo kom txo qis qhov ntsuas kub; Peb yog vim li cas qhov zoo ntawm cov khoom nws tus kheej. Ntau cov khoom siv cable tsuas yog ntxiv cov khoom ntim loj kom txo tau cov nqi, ua rau cov khoom siv ntau dhau ntawm lub ntiajteb txawj nqus. Yog tias nws yog tus pin-hom ntsia hlau taub hau, nws puas tuaj yeem tsim cov khoom tsis muaj pa halogen tsawg? Tsis yog, lub zog shear loj dhau lawm, thiab yuav muaj txhua yam npuas. 1) Txiav txim siab qhov sib piv ntawm koj cov ntsia hlau thiab cov duab thiab cov qauv hauv cheeb tsam plaub, seb puas muaj cov kab sib txawv lossis cov seem rov qab. Yog tias muaj, nws raug nquahu kom hloov cov ntsia hlau. 2) Txiav txim siab qhov cua txias hauv thaj tsam plaub. Koj tuaj yeem siv lub kiv cua los tshuab cua ntawm thaj chaw no kom nws txias. 3) Qhov tseeb, qhov xwm txheej no tsis muaj ntau yam uas cov khoom raug cuam tshuam los ntawm kev ya raws los yog tsis. Txawm li cas los xij, lub extrusion ceev ntawm halogen-dawb sheath ntaub ntawv yuav tsum tsis txhob ceev heev.
- Cov ntsiab lus hauv qab no yuav tsum raug sau tseg thaum extruding cov khoom siv hluav taws xob tsis muaj pa halogen: 1) Qhov kub thiab txias thaum extrusion yog qhov tseem ceeb tshaj plaws. Kev tswj qhov kub thiab txias yuav tsum yog qhov tseeb. Feem ntau, qhov kub siab tshaj qhov xav tau yog nyob nruab nrab ntawm 160 - 170 degrees. Nws yuav tsum tsis txhob siab dhau lossis qis dhau. Yog tias qhov kub thiab txias siab dhau lawm, aluminium hydroxide lossis magnesium hydroxide nyob rau hauv cov khoom yog nquag decomposition, uas ua rau ib tug tsis du nto thiab cuam tshuam rau nws cov kev ua tau zoo; Yog tias qhov kub thiab txias tsis dhau, lub zog shear loj dhau lawm, lub siab extrusion yog loj, thiab qhov saum npoo tsis zoo. 2) Nws yog qhov zoo tshaj plaws los siv tubular extrusion pwm thaum extrusion. Thaum sib piv cov pwm, yuav tsum muaj qee qhov ncab. Thaum lub sij hawm extrusion, lub mandrel yuav tsum yog 1-3 hli tom qab lub tes tsho tuag. Lub extrusion ceev yuav tsum tsis txhob ceev heev, thiab nws yuav tsum tau tswj ntawm 7 - 12 m. Yog tias qhov nrawm nrawm dhau, lub zog shear loj dhau, thiab qhov kub thiab txias yog qhov nyuaj rau tswj. (Txawm hais tias LSZH tsis yooj yim rau txheej txheem, nws yog qhov tseeb tsis yog qhov qeeb (raws li tau hais los ntawm Little Bird, 7 - 12 M). Txawm li cas los xij, nws tseem yog qhov nrawm ntawm 25 lossis ntau dua, thiab sab nraud yog li 6 MM !! )
- Lub extrusion kub ntawm cov khoom tsis muaj pa taws tsawg halogen yuav txawv nyob ntawm qhov loj ntawm lub extruder. Qhov kub extrusion kuv sim nrog 70-hom extruder yog raws li hauv qab no rau koj siv. Ntu 1: 170 degrees, Ntu 2: 180 degrees, Ntu 3: 180 degrees, Tshooj 4: 185 degrees, Tuag lub taub hau: 190 degrees, Tshuab qhov muag: 200 degrees. Qhov siab tshaj plaws tuaj yeem ncav cuag 210 degrees. Lub decomposition kub ntawm cov saum toj no-hais nplaim retardant yuav tsum yog 350 degrees, yog li nws yuav tsis decompose. Qhov loj dua qhov ntsuas qhov ntsuas ntawm cov khoom tsis muaj halogen, qhov zoo dua nws cov fluidity thiab yooj yim dua nws yog extrude. Yog li ntawd, 150-hom ntsia hlau kuj tuaj yeem extrude nws ntev npaum li qhov fluidity ntawm cov khoom tsis muaj halogen zoo txaus. (Kuv xav nug koj seb qhov kub siab tshaj plaws uas koj tau hais yog qhov ntsuas kub ntawm qhov ntsuas lossis qhov ntsuas kub? 160 degrees.
- Kev ua tiav tiav siv BM ntsia hlau nrog qhov sib piv ntawm 3.0. Kuv kuj txhawj txog qhov no. Kuv puas tuaj yeem nug txhua tus kws tshaj lij: Vim li cas ho tsis tuaj yeem siv cov ntsia hlau nrog qhov sib piv siab (> 1: 2.5) rau kev tsim khoom? Lub zog shear yog loj heev, thiab npuas yuav tsim. Peb lub tuam txhab tau siv 150 los tsim cov kab hluav taws xob tsis muaj pa halogen, thiab cov nyhuv zoo heev. Peb siv cov ntsia hlau sib npaug thiab sib npaug sib npaug, thiab cov cua kub ntawm txhua ntu yuav tsum tau tswj kom zoo, txwv tsis pub npuas lossis cov kua nplaum qub yuav tshwm sim. Txawm li cas los xij, nws nyuaj heev. Txhua zaus, cov ntsia hlau thiab lub rub yuav tsum tau hloov, thiab lub siab ntawm lub thoob thiab lub taub hau tuag kuj loj.
- Kuv xav tias nws yog qhov zoo dua tsis txhob nqus thaum lub sij hawm extrusion kom tso cai rau tus txheeb ze zawv zawg nyob rau hauv radial kev taw qhia thiab tsis ua rau tawg.
- Txawm li cas los xij, kev saib xyuas yuav tsum tau them rau kev tiv thaiv kev nthuav dav ntawm cov ntaub ntawv ntawm qhov qhib pub.
- Peb lub tuam txhab tau siv cov khoom siv tsis muaj halogen zoo tib yam ua ntej, uas ua rau kom dawb huv. Tam sim no peb siv cov ntaub ntawv GE, uas yog kim dua tab sis tsis muaj teeb meem rau kev ntxuav hniav dawb. Kuv xav nug yog tias koj cov ntaub ntawv tsis muaj halogen puas muaj teeb meem whitening?
- Vim yog qhov sib ntxiv ntawm cov nplaim hluav taws ntau ntau hauv cov khoom siv hluav taws xob tsis muaj pa halogen tsawg, qhov no yog qhov tseem ceeb vim li cas qhov nrawm tsis tuaj yeem nce ntxiv, ua rau muaj teeb meem loj hauv cov txheej txheem extrusion. Thaum lub sij hawm extrusion, ib yam khoom zoo li qhov muag tawm tshwm rau ntawm qhov qhib qhov tuag. Thaum muaj ntau ntawm nws, nws yuav txuas rau cov hlau thiab tsim cov khoom me me, cuam tshuam rau nws cov tsos. Raws li tau hais los saum no, nws tuaj yeem ci nrog lub tshuab hluav taws xob. Qhov kub yuav tsum tsis txhob siab dhau, txwv tsis pub lub rwb thaiv tsev yuav puas. Qhov no yog qhov nyuaj tshaj plaws los tswj cov txheej txheem. Rau cov ntaub ntawv tsis muaj halogen, siv qhov tsawg-compression-piv thiab hollow ntsia hlau rau kev ua haujlwm tsis muaj teeb meem ntawm kev ua haujlwm ceev. Los ntawm qhov kev xav ntawm cov khoom siv tshuab extrusion me me (nrog rau txoj kab uas hla ntawm 100 mm los yog tsawg dua) thiab extrusion ntawm cov pa hluav taws xob tsawg halogen-dawb xov hlau siv vinyl acetate copolymer ua cov khoom siv hauv paus, cov tsos thiab kev ua tau zoo tsis cuam tshuam thaum siv cov khoom zoo tib yam. PVC screws thiab cov ntsia hlau tshwj xeeb rau cov khoom siv hluav taws xob tsis muaj halogen tsawg rau kev tsim khoom. Qhov tseem ceeb tshaj plaws uas cuam tshuam rau kev ua tau zoo ntawm extrusion thiab cov tsos yog tseem yog cov formulations thiab proportions ntawm ntau yam nplaim retardants, lwm cov ntaub ntawv sau, thiab cov ntaub ntawv hauv paus. Thaum siv PVC thiab PE cov ntaub ntawv extrusion screws los tsim cov khoom siv hluav taws xob tsis muaj pa taws halogen, vim tias cov khoom siv viscosity siab, thiab qhov sib piv ntawm cov khoom siv PVC zoo tib yam extrusion screws yog li 2.5 - 3.0. Yog hais tias xws li compression ratio screws yog siv los tsim cov khoom uas tsis muaj pa halogen-dawb, thaum lub sij hawm extrusion txheej txheem, nws cov nyhuv nyob rau hauv cov ntsia hlau yuav tsis ncav cuag qhov zoo tshaj plaws thaum lub sij hawm cov khoom nyob rau hauv cov ntsia hlau, thiab cov khoom yuav ua raws li cov kev cai. sab hauv phab ntsa ntawm lub thoob, ua rau cov kua nplaum tsis txaus, tsis muaj peev xwm ua kom cov extrusion ceev, thiab tib lub sij hawm nce lub cev muaj zog load. Yog li ntawd, nws tsis pom zoo kom siv lawv. Yog tias cov khoom loj tau ua tiav, nws yog qhov zoo tshaj plaws los siv cov ntsia hlau tshwj xeeb nrog qhov sib piv qis. Nws raug pom zoo tias qhov sib piv compression qis dua 1.8: 1. Tsis tas li ntawd, lub cev muaj zog yuav tsum tau nce ntxiv thiab lub zog tsim nyog inverter yuav tsum tau xaiv kom ua tiav cov txiaj ntsig zoo tshaj plaws thiab kev ua haujlwm ntawm cov hlau.
- Tag nrho cov teeb meem ntawm cov khoom siv tsis muaj pa halogen tsawg yog: 1) Muaj cov pores hauv cov khoom extruded; 2) Qhov saum npoo tiav tsis zoo; 3) Cov kua nplaum tawm me me; 4) Kev sib txhuam ntawm cov ntsia hlau yog loj.
- Thaum extruding halogen-dawb tsis muaj pa taws retardant cov ntaub ntawv, vim qhov kub tsis tuaj yeem siab dhau, cov viscosity ntawm cov khoom yog siab. Lub tshuab extrusion ntsia hlau yuav tsum raug xaiv raws li 20/1, thiab compression piv yuav tsum tsis txhob ntau tshaj 2.5. Vim qhov loj shear quab yuam, lub ntuj kub nce yog loj. Nws yog qhov zoo tshaj plaws los siv dej kom txias cov ntsia hlau. Ci nrog lub tshuab hluav taws xob rau ntawm qhov hluav taws kub qis yog qhov zoo dua rau qhov muag tawm ntawm qhov qhib qhov tuag thiab yuav tsis tawg lub rwb thaiv tsev.
- Nrhiav kev pab rau qhov piv ntawm cov pa luam yeeb halogen-free extrusion pwm. Qhov sib piv yog 1.8 - 2.5, qhov ntsuas qhov sib npaug yog 0.95 - 1.05. Qhov sib piv yog me me dua li ntawm PVC. Sim ua kom cov pwm sib txuam compact! Qhov sib piv yog kwv yees li 1.5. Lub mandrel tsis tas yuav nqa cov hlau. Siv txoj kev semi-extrusion. Cov dej kub ntawm thawj lub tank yog 70 - 80 °. Tom qab ntawd cua txias yog siv, thiab thaum kawg dej txias.
Post lub sij hawm: Nov-12-2024