Nkhani

Chiyambi: Kuthetsa Mavuto Aakulu-katundu ATH/MDH Flame-Retardant Polyolefin Compounds Processing Challenges

M'makampani opanga zingwe, zofunikira zolimba pakuwonongeka kwamoto ndizofunikira kuti zitsimikizire chitetezo cha ogwira ntchito ndi zida pakayaka moto. Aluminium hydroxide (ATH) ndi magnesium hydroxide (MDH), monga zoletsa moto wopanda halogen, zimagwiritsidwa ntchito kwambiri mumagulu a chingwe cha polyolefin chifukwa chokonda chilengedwe, utsi wochepa, komanso kutulutsa mpweya wosawononga. Komabe, kuti tikwaniritse ntchito yoletsa moto woyaka nthawi zambiri kumafunika kuphatikiza kuchuluka kwa ATH ndi MDH—nthawi zambiri 50–70 wt% kapena kupitilira apo—mu polyolefin matrix.

Ngakhale zodzaza kwambiri ngati izi zimawonjezera kuchedwa kwa malawi, zimabweretsanso zovuta zowongolera, kuphatikiza kukhathamiritsa kwamphamvu, kutsika kwakuyenda bwino, kuwonongeka kwamakina, komanso kutsika kwapamwamba. Nkhanizi zimachepetsa kwambiri kupanga bwino komanso mtundu wazinthu.

Nkhaniyi ikufuna kuyang'ana mwadongosolo zovuta zogwirira ntchito zomwe zimagwirizanitsidwa ndi ma polyolefin olemetsa kwambiri a ATH/MDH pamakompyuta. Kutengera malingaliro amsika ndi zochitika zenizeni, izoamazindikiritsa ogwirakukonzazowonjezerazakuthana ndi zovuta izi. Zidziwitso zomwe zaperekedwazo cholinga chake ndi kuthandiza opanga mawaya ndi zingwe kukhathamiritsa kapangidwe kake ndikuwongolera njira zopangira akamagwira ntchito ndi mankhwala olemetsa kwambiri a ATH/MDH amoto-retardant polyolefin.

Kumvetsetsa ATH ndi MDH Flame Retardants

ATH ndi MDH ndi zida ziwiri zazikulu, zopanda halogen zoletsa moto zomwe zimagwiritsidwa ntchito kwambiri muzopangidwa ndi polima, makamaka pakugwiritsa ntchito chingwe pomwe miyezo yachitetezo ndi chilengedwe ndi yapamwamba. Amagwira ntchito mwa kuwonongeka kwa endothermic ndi kutulutsidwa kwa madzi, kusungunula mpweya woyaka ndi kupanga chitsulo choteteza oxide pamwamba pa zinthu, zomwe zimalepheretsa kuyaka ndi kuchepetsa utsi. ATH imawola pafupifupi 200-220 ° C, pamene MDH imakhala ndi kutentha kwapamwamba kwa 330-340 ° C, kumapangitsa MDH kukhala yoyenera kwa ma polima okonzedwa pa kutentha kwakukulu.

1. Njira zoletsa moto wa ATH ndi MDH ndi monga:

1.1. Kuwonongeka kwa Endothermic:

Ikatenthedwa, ATH (Al(OH) ₃) ndi MDH (Mg(OH) ₂) zimawola kumapeto kwa kutentha, kutengera kutentha kwakukulu ndikutsitsa kutentha kwa polima kuti kuchedwetse 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 mpweya wamadzi:

Mpweya wamadzi wotulutsidwa umachepetsa mpweya woyaka wozungulira polima ndikuletsa mwayi wa okosijeni, kuletsa kuyaka.

1.3. Kupanga zigawo zoteteza:

Zotsatira zazitsulo zazitsulo (Al₂O₃ ndi MgO) zimaphatikizana ndi polima char wosanjikiza kuti apange wosanjikiza woteteza, womwe umatchinga kutentha ndi kulowa kwa oxygen ndikulepheretsa kutuluka kwa mpweya woyaka.

1.4. Kuletsa utsi:

Chotetezacho chimakopanso tinthu ta utsi, kuchepetsa kuchuluka kwa utsi.

Ngakhale kuti amagwira ntchito bwino kwambiri poletsa moto komanso ubwino wa chilengedwe, kuti munthu apindule kwambiri ndi mphamvu zowotcha moto nthawi zambiri amafunika 50-70 wt% kapena kuposa ATH/MDH, chomwe ndi chifukwa chachikulu cha zovuta zowonongeka.
2. Zovuta Zazikulu Zopangira Ma Polyolefins ATH/MDH Apamwamba mu Ma Cable Applications

2.1. Kuwonongeka kwa rheological properties:

Kudzaza kwakukulu kumawonjezera kukhathamiritsa kwa ma viscosity ndikuchepetsa kuyenda. Izi zimapangitsa kuti pulasitiki ikhale yovuta komanso yothamanga panthawi ya extrusion, yomwe imafunika kutentha kwapamwamba komanso mphamvu zometa ubweya, zomwe zimawonjezera kugwiritsa ntchito mphamvu ndikufulumizitsa kuvala kwa zida. Kuchepetsa kusungunuka kumapangitsanso kuchepetsa kuthamanga kwa extrusion komanso kupanga bwino.

2.2. Zachepetsedwa zamakanika:

Kuchulukitsitsa kwa ma inorganic fillers kumachepetsa matrix a polima, kumachepetsa kwambiri kulimba kwamphamvu, kutalika panthawi yopuma, komanso mphamvu yamphamvu. Mwachitsanzo, kuphatikiza 50% kapena kupitilira apo ATH/MDH kungachepetse mphamvu zolimba ndi pafupifupi 40% kapena kupitilira apo, zomwe zimabweretsa zovuta pazingwe zosinthika komanso zolimba.

2.3. Mavuto amwazikana:

Tinthu tating'onoting'ono ta ATH ndi MDH nthawi zambiri zimaphatikizana mu polima matrix, zomwe zimapangitsa kuti pakhale kupsinjika, kuchepa kwa magwiridwe antchito, komanso kuwonongeka kwa ma extrusion monga kuuma kwa pamwamba kapena thovu.

2.4. Kutsika koyipa:

Kukhuthala kwakukulu, kusabalalika kosakwanira, komanso kusakanikirana kocheperako kodzaza ndi polima kumatha kupangitsa kuti malo otuluka azikhala aukali kapena osafanana, zomwe zimatsogolera ku "chikopa cha shark" kapena kufa. Kudzikundikira pa kufa (die drool) kumakhudza mawonekedwe komanso kupanga kosalekeza.

2.5. Zokhudza katundu wamagetsi:

Zodzaza kwambiri komanso kubalalika kosagwirizana kumatha kukhudza ma dielectric, monga kukana mphamvu. Kuphatikiza apo, ATH/MDH imakhala ndi mayamwidwe apamwamba kwambiri, omwe amatha kusokoneza magwiridwe antchito amagetsi komanso kukhazikika kwanthawi yayitali m'malo achinyezi.

2.6. Zenera laling'ono la processing:

Kutentha kwapang'onopang'ono kwa ma polyolefin oletsa moto wolemera kwambiri ndi wopapatiza. ATH imayamba kuwola mozungulira 200 ° C, pomwe MDH imawola mozungulira 330 ° C. Kuwongolera kutentha kumafunikira kuti mupewe kuwonongeka msanga ndikuwonetsetsa kuti zinthu sizimawola komanso kukhulupirika kwazinthu.

Zovuta izi zimapangitsa kuti ATH/MDH polyolefins yolemetsa kwambiri ikhale yovuta ndikuwunikira kufunikira kwa zida zothandizira kukonza.

Chifukwa chake, kuti athane ndi zovuta izi, zida zosiyanasiyana zowongolera zidapangidwa ndikugwiritsidwa ntchito m'makampani opanga zingwe. Zothandizira izi zimathandizira kuyanjana kwa polymer-filler interface, kuchepetsa kukhuthala kwa kusungunuka, ndikukulitsa kubalalitsidwa kwa filler, kukhathamiritsa magwiridwe antchito komanso mawonekedwe omaliza amakina.

Ndi zida ziti zogwirira ntchito zomwe zimakhala zogwira mtima kwambiri pothana ndi zovuta zamtundu wapamwamba wa ATH/MDH woletsa moto wa polyolefin pamakampani opanga chingwe?

Zowonjezera zopangidwa ndi silicone ndi zothandizira kupanga:

SILIKE imapereka zinthu zambiriZothandizira zopangira polysiloxanepazitsulo zonse za thermoplastics ndi engineering engineering, zomwe zimathandizira kukhathamiritsa ndikuwongolera magwiridwe antchito azinthu zomalizidwa. Mayankho athu amachokera ku silikoni yodalirika masterbatch LYSI-401 kupita ku SC920 yowonjezera yowonjezera-yopangidwa kuti ipereke bwino kwambiri komanso yodalirika muzowonjezera, zopanda halogen LSZH ndi HFFR LSZH chingwe extrusion.

Makamaka,SILIKE UHMW silicone-based lubricant processing zowonjezerazatsimikiziridwa kuti ndi zothandiza kwa mankhwala a ATH/MDH oletsa moto wa polyolefin mu zingwe. Zotsatira zazikulu ndi izi:

1. Kuchepetsa kusungunuka kwa viscosity: Polysiloxanes amasamukira kumalo osungunuka panthawi yokonza, kupanga filimu yopangira mafuta yomwe imachepetsa kukangana ndi zipangizo ndikuwongolera kuyenda.

2. Kubalalika kwakukulu: Zowonjezera za silicon zimalimbikitsa kugawa yunifolomu kwa ATH / MDH mu matrix a polima, kuchepetsa kuphatikizika kwa tinthu.

3. Kuwongolera kwapamwamba:LYSI-401 silikoni masterbatchamachepetsa kukwera kwa kufa ndi kusungunula fracture, kupanga malo osalala a extrudate okhala ndi zolakwika zochepa.

4. Kuthamanga kwa mzere:Silicone Processing Aid SC920ndi oyenera mkulu-liwiro extrusion zingwe. Itha kuletsa kusakhazikika kwa waya m'mimba mwake ndi kutsetsereka, ndikuwongolera magwiridwe antchito. Nthawi yomweyo kugwiritsa ntchito mphamvu, kuchuluka kwa extrusion kudakwera ndi 10%.

5. Kupititsa patsogolo makina amakina: Mwa kupititsa patsogolo kufalikira kwa zodzaza ndi kumamatira kwapakati, silikoni masterbatch imathandizira kukana kuvala kophatikizana komanso magwiridwe antchito amakina, monga kukhudza katundu & elongation panthawi yopuma.

6. Kugwirizana koletsa moto ndi kupondereza utsi: zowonjezera za siloxane zimatha kuwonjezera pang'ono ntchito yoletsa moto (mwachitsanzo, kuchulukitsa LOI) ndikuchepetsa kutulutsa utsi.

SILIKE ndiwopanga otsogola opanga zopangira zopangira silikoni, zothandizira kukonza, ndi ma thermoplastic silicone elastomers m'chigawo cha Asia-Pacific.

Zathuzida za silicone processingamagwiritsidwa ntchito kwambiri m'mafakitale a thermoplastics ndi zingwe kuti apititse patsogolo kukonza, kukonza kubalalitsidwa kwa filler, kuchepetsa kukhuthala kwa kusungunuka, ndikupereka malo osalala bwino kwambiri.

Zina mwa izo, silicone masterbatch LYSI-401 ndi zida zatsopano zopangira silikoni za SC920 ndi njira zotsimikiziridwa zopangira ma polyolefin a ATH/MDH, makamaka mu LSZH ndi HFFR chingwe chotulutsa chingwe. Mwa kuphatikiza zowonjezera za silicone zochokera ku SILIKE ndi zida zopangira, opanga amatha kupanga zokhazikika komanso zokhazikika.

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.