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Taw qhia: Kev daws teeb meem siab-Load ATH / MDH Nplaim-Retardant Polyolefin Compounds Txheej Txheem Txheej Txheem

Hauv kev lag luam cable, cov kev cai nruj rau cov nplaim hluav taws kub hnyiab yog qhov tseem ceeb los xyuas kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm thiab cov khoom siv thaum muaj hluav taws kub. Aluminium hydroxide (ATH) thiab magnesium hydroxide (MDH), raws li halogen-dawb nplaim retardants, yog dav siv nyob rau hauv polyolefin cable tebchaw vim lawv ib puag ncig tus phooj ywg, tsis muaj pa emission, thiab tsis-corrosive gas tso. Txawm li cas los xij, kev ua tiav qhov kev ua tau zoo ntawm cov nplaim hluav taws xob feem ntau yuav tsum tau koom nrog kev thauj khoom siab ntawm ATH thiab MDH-feem ntau 50-70 wt% lossis siab dua-rau hauv polyolefin matrix.

Txawm hais tias cov ntsiab lus siab muab tub lim zoo li txhim kho cov nplaim hluav taws xob, nws tseem qhia txog cov teeb meem kev ua haujlwm hnyav, suav nrog kev ua kom yaj viscosity, txo flowability, cuam tshuam cov khoom siv kho tshuab, thiab cov khoom tsis zoo. Cov teeb meem no tuaj yeem txwv tsis pub ntau lawm efficiency thiab cov khoom zoo.

Tsab ntawv xov xwm no yog txhawm rau tshuaj xyuas cov txheej txheem kev sib tw uas cuam tshuam nrog kev thauj khoom siab ATH / MDH nplaim-retardant polyolefin tebchaw hauv kev siv cable. Raws li kev lag luam tawm tswv yim thiab cov kev paub siv tau, nwstxheeb xyuas siv tauuatshuaj ntxivraudaws cov teeb meem no. Cov kev nkag siab tau muab yog npaj los pab cov tuam txhab xaim thiab cable txhim kho cov qauv tsim thiab txhim kho cov txheej txheem tsim khoom thaum ua haujlwm nrog cov khoom siv siab-load ATH / MDH nplaim-retardant polyolefin compounds.

Nkag siab txog ATH thiab MDH Nplaim Retardants

ATH thiab MDH yog ob qho tseem ceeb inorganic, halogen-dawb nplaim retardants dav siv nyob rau hauv cov ntaub ntawv polymer, tshwj xeeb tshaj yog nyob rau hauv cable daim ntaub ntawv uas muaj kev ruaj ntseg thiab ib puag ncig cov qauv siab. Lawv ua los ntawm endothermic decomposition thiab dej tso tawm, diluting combustible gases thiab tsim ib tug tiv thaiv oxide txheej ntawm cov khoom nto, uas suppresses combustion thiab txo cov pa luam yeeb. ATH decomposes ntawm kwv yees li 200-220 ° C, thaum MDH muaj qhov kub siab dua decomposition ntawm 330-340 ° C, ua MDH zoo dua rau cov polymers ua tiav ntawm qhov kub siab dua.

1. Cov nplaim-retardant mechanisms ntawm ATH thiab MDH suav nrog:

1.1. Endothermic decomposition:

Thaum cua sov, ATH (Al (OH) ₃) thiab MDH (Mg (OH) ₂) tau dhau los ua cov txheej txheem endothermic decomposition, nqus cov cua kub tseem ceeb thiab txo cov polymer kub kom qeeb thermal degradation.

ATH: 2Al(OH)₃ → Al₂O₃ + 3H₂O, ΔH≈ 1051 J/g

MDH: Mg(OH)₂ → MgO + H₂O, ΔH ≈ 1316 J/g

1.2. Kev tso dej vapor:

Cov dej vapor dilutes flammable gases nyob ib ncig ntawm lub polymer thiab txwv tsis pub nkag mus rau oxygen, inhibiting combustion.

1.3. Tsim cov txheej txheem tiv thaiv:

Lub resulting hlau oxides (al₂o₃ thiab Mgo) sib txuas nrog cov txheej txheem tiv thaiv tuab, uas thaiv cov cua sov thiab cov pa tawm ntawm cov roj tso tawm.

1.4. Kev haus luam yeeb:

Cov txheej tiv thaiv kuj adsorbs cov pa luam yeeb, txo cov pa luam yeeb tag nrho.

Txawm hais tias lawv qhov kev ua tau zoo ntawm cov nplaim hluav taws tsis zoo thiab cov txiaj ntsig ib puag ncig, kev ua tiav cov nplaim hluav taws kub-retardant feem ntau xav tau 50-70 wt% lossis ntau dua ntawm ATH / MDH, uas yog thawj qhov ua rau muaj kev sib tw tom ntej.
2. Cov Txheej Txheem Tseem Ceeb ntawm High-Load ATH/MDH Polyolefins hauv Kev Siv Cable

2.1. Deteriorated rheological zog:

High muab tub lim loads sharply nce yaj viscosity thiab txo flowability. Qhov no ua rau plasticization thiab ntws thaum lub sij hawm extrusion nyuaj, yuav tsum tau ua ntau dua kub thiab shear rog, uas ua rau kom lub zog noj thiab accelerates cov khoom siv. Txo yaj ntws kuj txwv extrusion ceev thiab ntau lawm efficiency.

2.2. Txo cov khoom siv kho tshuab:

Muaj ntau cov inorganic fillers dilute lub polymer matrix, txo lub zog tensile, elongation ntawm tawg, thiab cuam tshuam lub zog. Piv txwv li, koom nrog 50% lossis ntau dua ATH / MDH tuaj yeem txo lub zog tensile los ntawm kwv yees li 40% lossis ntau dua, ua rau muaj kev sib tw rau cov ntaub ntawv siv tau yooj yim thiab ruaj khov.

2.3. Dispersion teeb meem:

ATH thiab MDH feem ntau sib sau ua ke nyob rau hauv lub polymer matrix, ua rau muaj kev ntxhov siab concentration cov ntsiab lus, txo cov neeg kho tshuab kev ua tau zoo, thiab extrusion defects xws li nto roughness los yog npuas.

2.4. Tsis zoo nto zoo:

Cov viscosity siab melting, dispersion tsis zoo, thiab txwv tsis pub muab tub lim-polymer compatibility tuaj yeem ua rau extrudate nto los yog tsis sib xws, ua rau "sharkskin" lossis tuag tsim. Kev sib sau ntawm qhov tuag (drool tuag) cuam tshuam rau ob qho tib si tsos thiab kev tsim khoom tas mus li.

2.5. Cov khoom siv hluav taws xob cuam tshuam:

Cov ntsiab lus siab muab tub lim thiab tsis sib xws tuaj yeem cuam tshuam rau cov khoom siv hluav taws xob, xws li ntim cov khoom tiv thaiv. Ntxiv mus, ATH / MDH muaj qhov nqus dej noo ntau, uas tuaj yeem cuam tshuam rau kev ua haujlwm hluav taws xob thiab kev ruaj ntseg mus ntev hauv qhov chaw ntub dej.

2.6. Qhov rai ua haujlwm nqaim:

Kev ua haujlwm kub ntau rau high-load nplaim-retardant polyolefins yog nqaim. ATH pib decomposing ntawm 200 ° C, thaum MDH decomposes nyob ib ncig ntawm 330 ° C. Kev tswj qhov kub thiab txias yog qhov yuav tsum tau ua kom tsis txhob muaj kev puas tsuaj ntxov ntxov thiab ua kom cov nplaim hluav taws kub tsis zoo thiab cov khoom siv zoo.

Cov kev cov nyom no ua rau kev ua haujlwm siab-load ATH / MDH polyolefins complex thiab qhia txog qhov tsim nyog ntawm kev ua haujlwm zoo.

Yog li, txhawm rau daws cov teeb meem no, ntau yam kev pab cuam tau tsim thiab siv hauv kev lag luam cable. Cov kev pab no txhim kho polymer-filler interfacial compatibility, txo cov yaj viscosity, thiab txhim khu kev sib cais dispersion, optimizing ob qho tib si kev ua tau zoo thiab cov khoom siv tshuab kawg.

Cov kev pab cuam twg yog qhov zoo tshaj plaws rau kev daws cov txheej txheem thiab cov teeb meem zoo ntawm cov khoom siv siab ATH / MDH nplaim-retardant polyolefin tebchaw hauv kev lag luam cable?

Silicone-based additives thiab ntau lawm pab:

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Tshwj xeeb,SILIKE UHMW silicone-based lubricant processing additivestau raug pov thawj zoo rau ATH/MDH nplaim-retardant polyolefin tebchaw nyob rau hauv cables. Cov teebmeem tseem ceeb muaj xws li:

1. Txo yaj viscosity: Polysiloxanes migrate rau lub yaj nto thaum lub sij hawm ua, tsim ib tug lubricating zaj duab xis uas txo cov kev sib txhuam nrog cov khoom thiab txhim kho flowability.

2. Enhanced dispersion: Silicon-based Additives txhawb nqa kev faib tawm ntawm ATH / MDH hauv cov polymer matrix, txo cov particle aggregation.

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4. Cov kab nrawm dua:Silicone Processing Aid SC920yog tsim rau high-speed extrusion ntawm cables. Nws tuaj yeem tiv thaiv txoj kab uas hla tsis ruaj khov thiab cov ntsia hlau slippage, thiab txhim kho kev tsim khoom. Nyob rau tib lub zog noj, extrusion ntim tau nce 10%.

5. Txhim kho cov khoom siv kho tshuab: Los ntawm kev txhim kho cov khoom siv dispersion thiab interfacial adhesion, silicone masterbatch txhim kho cov khoom siv sib xyaw ua haujlwm thiab kev ua haujlwm txhua yam, xws li cuam tshuam cov cuab yeej & elongation thaum tawg.

6. Nplaim-retardant synergism thiab haus luam yeeb: siloxane additives tuaj yeem txhim kho cov nplaim hluav taws xob me ntsis (piv txwv li, nce LOI) thiab txo cov pa taws.

SILIKE yog ib lub tuam txhab ua lag luam ntawm silicone-based additives, kev pab cuam, thiab thermoplastic silicone elastomers hauv cheeb tsam Asia-Pacific.

Pebsilicone processing pabyog dav siv nyob rau hauv cov thermoplastics thiab cable industries los optimize ua, txhim kho muab tub lim dispersion, txo yaj viscosity, thiab xa smoother nto nrog ntau dua efficiency.

Ntawm lawv, silicone masterbatch LYSI-401 thiab lub tshiab SC920 silicone processing aid yog cov pov thawj kev daws teeb meem rau ATH / MDH nplaim-retardant polyolefin formulations, tshwj xeeb tshaj yog nyob rau hauv LSZH thiab HFFR cable extrusion. Los ntawm kev sib koom ua ke ntawm SILIKE's silicone-based additives thiab ntau lawm pab, manufacturers tuaj yeem ua tiav cov khoom ruaj khov thiab zoo ib yam.

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