Nkhani

Chiyambi: Kuthetsa Mavuto Okhudza Kukonza Ma Polyolefin Compounds Okhala ndi ATH/MDH Okhala ndi Moto Wochuluka

Mu makampani opanga mawaya, zofunikira kwambiri pakuletsa moto ndizofunikira kuti ogwira ntchito ndi zida zitetezeke pakagwa moto. Aluminium hydroxide (ATH) ndi magnesium hydroxide (MDH), monga zoletsa moto zopanda halogen, zimagwiritsidwa ntchito kwambiri mu polyolefin cable compounds chifukwa cha kusamala kwawo chilengedwe, kutulutsa utsi pang'ono, komanso kutulutsa mpweya wosawononga. Komabe, kukwaniritsa ntchito yoletsa moto nthawi zambiri kumafuna kuphatikiza ATH ndi MDH zambiri—nthawi zambiri 50–70 wt% kapena kupitirira apo—mu polyolefin matrix.

Ngakhale kuchuluka kwa zodzaza koteroko kumawonjezera kuchedwa kwa moto, kumabweretsanso mavuto akulu pakukonza, kuphatikizapo kukhuthala kwa kusungunuka, kuchepa kwa kuyenda kwa madzi, kuwonongeka kwa mphamvu za makina, komanso khalidwe loipa la pamwamba. Mavutowa amatha kuchepetsa kwambiri magwiridwe antchito opanga ndi ubwino wa zinthu.

Nkhaniyi ikufuna kuwunika mwadongosolo mavuto okhudzana ndi kukonza zinthu zokhudzana ndi mankhwala a polyolefin a ATH/MDH omwe amaletsa moto kwambiri mu ntchito za chingwe. Kutengera ndi ndemanga za msika komanso zomwe zachitika,kuzindikira ogwira ntchitokukonzazowonjezerachifukwa chaKuthetsa mavutowa. Malingaliro omwe aperekedwa ndi cholinga chothandiza opanga mawaya ndi mawaya kukonza bwino mapangidwe ndikuwongolera njira zopangira akamagwira ntchito ndi mankhwala a polyolefin oletsa moto a ATH/MDH.

Kumvetsetsa ATH ndi MDH Flame Retardants

ATH ndi MDH ndi zinthu ziwiri zazikulu zoletsa moto zopanda zinthu zachilengedwe, zomwe sizili ndi halogen zomwe zimagwiritsidwa ntchito kwambiri mu zinthu za polima, makamaka pakugwiritsa ntchito chingwe komwe miyezo yachitetezo ndi chilengedwe ili pamwamba. Zimagwira ntchito powola ndi kutulutsa madzi, kusungunula mpweya woyaka ndikupanga gawo loteteza la oxide pamwamba pa chinthucho, lomwe limaletsa kuyaka ndikuchepetsa utsi. ATH imawola pafupifupi 200–220°C, pomwe MDH ili ndi kutentha kwakukulu kwa kuwola kwa 330–340°C, zomwe zimapangitsa MDH kukhala yoyenera kwambiri ma polima okonzedwa pa kutentha kwakukulu.

1. Njira zoletsa moto za ATH ndi MDH zikuphatikizapo:

1.1. Kuwonongeka kwa endothermic:

Akatenthedwa, ATH (Al(OH)₃) ndi MDH (Mg(OH)₂) zimawonongeka mu endothermic, zomwe zimayamwa kutentha kwakukulu ndikuchepetsa kutentha kwa polima kuti zichepetse kuwonongeka kwa kutentha.

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

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

1.2. Kutulutsa nthunzi ya madzi:

Nthunzi yamadzi yotulutsidwayo imachepetsa mpweya woyaka moto wozungulira polima ndipo imaletsa mpweya kulowa, zomwe zimaletsa kuyaka.

1.3. Kupanga zigawo zoteteza:

Ma oxide achitsulo omwe amachokera (Al₂O₃ ndi MgO) amaphatikizana ndi polymer char layer kuti apange chigawo choteteza cholimba, chomwe chimaletsa kutentha ndi kulowa kwa mpweya ndikulepheretsa kutulutsa mpweya woyaka.

1.4. Kuletsa utsi:

Chotetezachi chimakokanso tinthu ta utsi, zomwe zimachepetsa kuchuluka kwa utsi wonse.

Ngakhale kuti amagwira ntchito bwino kwambiri poletsa moto komanso amateteza chilengedwe, kupeza mavoti ambiri oletsa moto nthawi zambiri kumafuna 50–70 wt% kapena kuposerapo kwa ATH/MDH, chomwe ndi chifukwa chachikulu cha mavuto otsatirawa.
2. Mavuto Ofunika Kwambiri Okhudza Kugwiritsa Ntchito Ma Polyolefin ATH/MDH Okhala ndi Zinthu Zambiri mu Ma Cable Applications

2.1. Kuwonongeka kwa mphamvu ya rheological:

Kudzaza kwambiri kumawonjezera kukhuthala kwa kusungunuka ndi kuchepetsa kuyenda bwino kwa madzi. Izi zimapangitsa kuti kusungunuka kwa pulasitiki ndi kuyenda kwa madzi kukhale kovuta panthawi yotulutsa madzi, zomwe zimafuna kutentha kwambiri kwa kukonza ndi mphamvu zodula, zomwe zimawonjezera kugwiritsa ntchito mphamvu ndikufulumizitsa kuwonongeka kwa zida. Kuchepa kwa madzi osungunuka kumachepetsanso liwiro la kutulutsa madzi ndi magwiridwe antchito opangira.

2.2. Kuchepa kwa mphamvu zamakina:

Kuchuluka kwa zinthu zopanda chilengedwe kumachepetsa mphamvu ya polymer matrix, zomwe zimachepetsa kwambiri mphamvu ya tensile, kutalika kwake pakagwa, komanso mphamvu ya impact. Mwachitsanzo, kuphatikiza 50% kapena kuposerapo ATH/MDH kungachepetse mphamvu ya tensile ndi pafupifupi 40% kapena kuposerapo, zomwe zimapangitsa kuti pakhale vuto pa zipangizo zosinthika komanso zolimba.

2.3. Mavuto a kufalikira kwa zinthu:

Tinthu ta ATH ndi MDH nthawi zambiri timasonkhana mu polymer matrix, zomwe zimapangitsa kuti pakhale kupsinjika, kuchepa kwa magwiridwe antchito a makina, komanso zolakwika zotuluka monga kuuma kwa pamwamba kapena thovu.

2.4. Ubwino wa pamwamba:

Kukhuthala kwakukulu kwa kusungunuka, kufalikira kosakwanira, komanso kusagwirizana kochepa kwa filler-polymer kungayambitse kuti malo otuluka azikhala owuma kapena osafanana, zomwe zimapangitsa kuti "sharkskin" kapena kufa kukhale kowuma. Kuchulukana kwa madzi pamadzi (die drool) kumakhudza mawonekedwe ndi kupanga kosalekeza.

2.5. Kukhudzidwa kwa katundu wamagetsi:

Kuchuluka kwa zodzaza ndi kufalikira kosagwirizana kungakhudze mphamvu za dielectric, monga kukana kwa voliyumu. Kuphatikiza apo, ATH/MDH ili ndi chinyezi chochuluka, chomwe chingakhudze magwiridwe antchito amagetsi komanso kukhazikika kwa nthawi yayitali m'malo ozizira.

2.6. Zenera lochepetsera kukonza:

Kutentha kwa polyolefins zomwe zimasunga moto wambiri ndi kochepa. ATH imayamba kuwola pafupifupi 200°C, pomwe MDH imawola pafupifupi 330°C. Kuwongolera kutentha koyenera kumafunika kuti tipewe kuwola msanga ndikuwonetsetsa kuti ntchito yosunga moto ndi umphumphu wa zinthuzo.

Mavuto amenewa amapangitsa kuti kukonza ma polyolefin a ATH/MDH okhala ndi katundu wambiri kukhale kovuta ndipo akuwonetsa kufunikira kwa zothandizira zogwirira ntchito bwino.

Choncho, pofuna kuthana ndi mavutowa, zida zosiyanasiyana zopangira zinthu zapangidwa ndikugwiritsidwa ntchito mumakampani opanga ma chingwe. Izi zimathandiza kukonza kugwirizana kwa polymer-filler interfacial, kuchepetsa kukhuthala kwa kusungunuka, komanso kuwonjezera kufalikira kwa zinthu zodzaza, ndikukonza magwiridwe antchito azinthu zomaliza komanso mawonekedwe a makina.

Ndi zinthu ziti zothandizira kukonza zomwe zimagwira ntchito bwino kwambiri pothetsa mavuto okhudzana ndi kukonza ndi ubwino wa pamwamba pa zinthu za polyolefin zomwe zimakhala ndi ATH/MDH zomwe zimaletsa moto kwambiri pakugwiritsa ntchito ma cable?

Zowonjezera zopangidwa ndi silicone ndi zothandizira kupanga:

SILIKE imapereka zinthu zosiyanasiyanazothandizira kukonza zinthu pogwiritsa ntchito polysiloxaneMa thermoplastics okhazikika komanso mapulasitiki aukadaulo, zomwe zimathandiza kukonza bwino ndikuwonjezera magwiridwe antchito a zinthu zomalizidwa. Mayankho athu amachokera ku silicone masterbatch yodalirika ya LYSI-401 mpaka chowonjezera cha SC920 chatsopano—chopangidwa kuti chipereke magwiridwe antchito komanso kudalirika kwambiri mu LSZH yokhala ndi halogen komanso HFFR LSZH cable extrusion yodzaza ndi zinthu zambiri.

Makamaka,Zowonjezera zopangira mafuta zopangidwa ndi silicone zopangidwa ndi SILIKE UHMWzatsimikiziridwa kuti ndizothandiza pa ATH/MDH polyolefin compounds zomwe zimaletsa moto m'ma chingwe. Zotsatira zake zazikulu ndi izi:

1. Kuchepa kwa kukhuthala kwa kusungunuka: Ma polysiloxanes amasamukira pamwamba pa kusungunuka panthawi yokonza, ndikupanga filimu yopaka mafuta yomwe imachepetsa kukangana ndi zida ndikuwonjezera kuyenda bwino.

2. Kufalikira kowonjezereka: Zowonjezera zochokera ku Silicon zimathandiza kufalikira kofanana kwa ATH/MDH mu polymer matrix, kuchepetsa kusonkhana kwa tinthu.

3. Ubwino wa pamwamba:LYSI-401 silicone masterbatchamachepetsa kusungunuka kwa ma die ndi kusungunuka, zomwe zimapangitsa kuti malo otuluka azitha kukhala osalala komanso opanda zolakwika zambiri.

4. Liwiro la mzere wothamanga:Silicone Processing Aid SC920Ndi yoyenera kutulutsa zingwe mwachangu kwambiri. Imatha kuletsa kusakhazikika kwa waya m'mimba mwake komanso kutsetsereka kwa zomangira, ndikuwonjezera magwiridwe antchito. Pakugwiritsa ntchito mphamvu komweko, kuchuluka kwa kutulutsa kwa zingwe kumawonjezeka ndi 10%.

5. Makhalidwe abwino a makina: Mwa kuwonjezera kufalikira kwa filler ndi kuphatikizika kwa interfacial, silicone masterbatch imawonjezera kukana kwa zosakaniza komanso magwiridwe antchito a makina, monga mphamvu ya impact & elongation panthawi yopuma.

6. Kugwirizana koletsa moto ndi kuletsa utsi: zowonjezera za siloxane zimatha kuwonjezera pang'ono magwiridwe antchito oletsa moto (monga kuwonjezera LOI) ndikuchepetsa kutulutsa utsi.

SILIKE ndi kampani yotsogola yopanga zowonjezera zopangidwa ndi silicone, zothandizira kukonza, ndi ma elastomer a silicone opangidwa ndi thermoplastic m'chigawo cha Asia-Pacific.

Zathuzothandizira kukonza siliconeamagwiritsidwa ntchito kwambiri m'mafakitale a thermoplastics ndi ma cable kuti akonze bwino ntchito yokonza, kukonza kufalikira kwa filler, kuchepetsa kukhuthala kwa kusungunuka, komanso kupereka malo osalala komanso ogwira ntchito bwino.

Pakati pawo, silicone masterbatch LYSI-401 ndi chida chatsopano chothandizira kukonza silicone cha SC920 ndi njira zodziwika bwino zothetsera ma polyolefin a ATH/MDH omwe amaletsa moto, makamaka mu LSZH ndi HFFR cable extrusion. Mwa kuphatikiza zowonjezera ndi zothandizira kupanga zopangidwa ndi silicone za SILIKE, opanga amatha kupanga zinthu mokhazikika komanso mokhazikika.

If you are looking for silicone processing aids for ATH/MDH compounds, polysiloxane additives for flame-retardant polyolefins, silicone masterbatch for LSZH / HFFR cables, improve dispersion in ATH/MDH cable compounds, reduce melt viscosity flame-retardant polyolefin extrusion, cable extrusion processing additives, silicone-based extrusion aids for wires and cables, please visit www.siliketech.com or contact us at amy.wang@silike.cn to learn more.