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Isingeniso: Ukuxazulula Izinselele Zokucubungula Ama-Polyolefin Compounds ATH/MDH Anesisindo Esiphezulu

Embonini yezintambo, izidingo eziqinile zokuvimbela umlilo zibalulekile ukuqinisekisa ukuphepha kwabasebenzi kanye nemishini uma kwenzeka umlilo. I-aluminium hydroxide (ATH) kanye ne-magnesium hydroxide (MDH), njengezithibi zomlilo ezingenayo i-halogen, zisetshenziswa kabanzi kuma-compounds ekhebula le-polyolefin ngenxa yobungani bazo emvelweni, ukukhishwa kwentuthu okuphansi, kanye nokukhishwa kwegesi okungaboli. Kodwa-ke, ukufeza ukusebenza okudingekayo kokuvimbela umlilo kuvame ukudinga ukufaka imithwalo ephezulu ye-ATH kanye ne-MDH—ngokuvamile engu-50–70 wt% noma ngaphezulu—ku-polyolefin matrix.

Nakuba okuqukethwe okuphezulu kangaka kokugcwalisa kuthuthukisa kakhulu ukubambezeleka komlilo, futhi kuletha izinselele ezinkulu zokucubungula, okuhlanganisa ukwanda kokuncibilika, ukwehla kokugeleza kwamanzi, izakhiwo zemishini ezithintekile, kanye nekhwalithi ephansi yobuso. Lezi zinkinga zinganciphisa kakhulu ukusebenza kahle kokukhiqiza kanye nekhwalithi yomkhiqizo.

Lesi sihloko sihlose ukuhlola ngokuhlelekile izinselele zokucubungula ezihlotshaniswa namakhemikhali e-ATH/MDH avimbela ilangabi anesisindo esikhulu ekusetshenzisweni kwekhebula. Ngokusekelwe kwimpendulo yemakethe kanye nokuhlangenwe nakho okusebenzayo,ikhomba kuyasebenzaukucubungulaizithasiselongobaukubhekana nalezi zinselele. Ukuqonda okunikeziwe kuhloselwe ukusiza abakhiqizi bezintambo nezintambo ukuthi bathuthukise ukwakheka futhi bathuthukise izinqubo zokukhiqiza lapho besebenza ngamakhemikhali e-polyolefin e-ATH/MDH agcina amalangabi amaningi.

Ukuqonda i-ATH kanye ne-MDH Flame Retardants

I-ATH ne-MDH ziyizinto ezimbili ezinkulu ezivimbela ilangabi ezingaphili, ezingenayo i-halogen ezisetshenziswa kakhulu ezintweni ze-polymer, ikakhulukazi ekusetshenzisweni kwekhebula lapho amazinga okuphepha kanye nemvelo ephezulu. Zisebenza ngokubola kwe-endothermic kanye nokukhululwa kwamanzi, zinciphise amagesi avuthayo futhi zakhe ungqimba lwe-oxide oluvikelayo ebusweni bezinto, olucindezela ukusha futhi lunciphise intuthu. I-ATH iyabola cishe ku-200–220°C, kuyilapho i-MDH inezinga lokushisa eliphakeme lokubola elingu-330–340°C, okwenza i-MDH ifaneleke kakhulu kuma-polymer acutshungulwa emazingeni okushisa aphezulu.

1. Izindlela ezivimbela ilangabi ze-ATH ne-MDH zifaka:

1.1. Ukuqhekeka kwe-Endothermic:

Lapho kushisa, i-ATH (Al(OH)₃) kanye ne-MDH (Mg(OH)₂) zibola e-endothermic, zimunca ukushisa okukhulu futhi zehlise izinga lokushisa le-polymer ukuze zilibazise ukuwohloka kokushisa.

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

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

1.2. Ukukhishwa komhwamuko wamanzi:

Umhwamuko wamanzi okhishwayo unciphisa amagesi avuthayo azungeze i-polymer futhi uvimbele ukufinyelela komoya-mpilo, uvimbele ukusha.

1.3. Ukwakheka kwezingqimba zokuvikela:

Ama-oxide ensimbi aphumayo (i-Al₂O₃ kanye ne-MgO) ahlangana nesendlalelo se-polymer char ukuze akhe isendlalelo esivikelayo esiqinile, esivimba ukungena kokushisa nomoya-mpilo futhi sivimbele ukukhishwa kwamagesi avuthayo.

1.4. Ukunciphisa intuthu:

Ingqimba evikelayo imunca nezinhlayiya zentuthu, inciphise ukuminyana kwentuthu iyonke.

Naphezu kokusebenza kwazo okuhle kakhulu okuvimbela umlilo kanye nezinzuzo zemvelo, ukuthola izilinganiso eziphezulu zokuvimbela umlilo ngokuvamile kudinga ama-wt% angu-50–70 noma ngaphezulu kwe-ATH/MDH, okuyimbangela eyinhloko yezinselelo zokucubungula ezilandelayo.
2. Izinselele Ezibalulekile Zokucubungula Ama-Polyolefin ATH/MDH Anemithwalo Eminingi Kuzinhlelo Zokusebenza Zekhebula

2.1. Izakhiwo ze-rheological eziwohlokile:

Ukufakwa kwemithwalo ephezulu yokugcwalisa kukhulisa kakhulu i-viscosity yokuncibilika futhi kunciphisa ukugeleza kwamanzi. Lokhu kwenza ukwenziwa kwepulasitiki nokugeleza kube nzima kakhulu ngesikhathi sokukhipha, kudinga amazinga okushisa aphezulu okucubungula kanye namandla okusika, okwandisa ukusetshenziswa kwamandla futhi kusheshise ukuguguleka kwemishini. Ukugeleza kokuncibilika okuncishisiwe kunciphisa futhi kunciphisa isivinini sokukhipha kanye nokusebenza kahle kokukhiqiza.

2.2. Izakhiwo ezincishisiwe zemishini:

Inani elikhulu lama-inorganic fillers linciphisa i-polymer matrix, linciphisa kakhulu amandla okudonsa, ukunwebeka lapho kuphuka, kanye namandla okushaya. Isibonelo, ukufaka i-ATH/MDH engu-50% noma ngaphezulu kunganciphisa amandla okudonsa cishe ngo-40% noma ngaphezulu, okubeka inselele ezintweni zekhebula eziguquguqukayo nezihlala isikhathi eside.

2.3. Izinkinga zokuhlakazeka:

Izinhlayiya ze-ATH ne-MDH zivame ukuhlangana ku-polymer matrix, okuholela emaphuzu okuhlushwa kokucindezeleka, ukusebenza okuncishisiwe kwemishini, kanye namaphutha okukhipha njengobulukhuni bomphezulu noma amabhamuza.

2.4. Ikhwalithi yobuso engeyinhle:

Ukuthamba okuphezulu kokuncibilika, ukuhlakazeka okubi, kanye nokuhambisana okulinganiselwe kwe-filler-polymer kungabangela ukuthi izindawo eziphumayo zibe ziqinile noma zingalingani, okuholela “ekuqongeleleni kwesikhumba soshaka” noma ekuqongeleleni kwe-die. Ukuqongelelana ku-die (die drool) kuthinta kokubili ukubukeka kanye nokukhiqizwa okuqhubekayo.

2.5. Imithelela yempahla kagesi:

Okuqukethwe okuphezulu kokugcwalisa kanye nokusabalala okungalingani kungathinta izakhiwo ze-dielectric, njengokumelana nomthamo. Ngaphezu kwalokho, i-ATH/MDH inokumuncwa komswakama okuphezulu, okungathinta ukusebenza kukagesi kanye nokuqina kwesikhathi eside ezindaweni ezinomswakama.

2.6. Iwindi elincane lokucubungula:

Ububanzi bokushisa bokucubungula kwama-polyolefin agcina ilangabi kakhulu buncane. I-ATH iqala ukubola cishe ngo-200°C, kuyilapho i-MDH ibola cishe ngo-330°C. Ukulawulwa kokushisa okunembile kuyadingeka ukuvimbela ukubola ngaphambi kwesikhathi nokuqinisekisa ukusebenza okugcina ilangabi kanye nobuqotho bezinto.

Lezi zinselele zenza ukucubungula ama-polyolefin e-ATH/MDH anomthwalo omningi kube nzima futhi kugqamisa isidingo sezinsiza zokucubungula ezisebenzayo.

Ngakho-ke, ukuze kuxazululwe lezi zinselele, kuye kwathuthukiswa futhi kwasetshenziswa izinsiza zokucubungula ezahlukahlukene embonini yezintambo. Lokhu kusiza ukuthuthukisa ukuhambisana kwe-polymer-filler interfacial, ukunciphisa i-melt viscosity, nokuthuthukisa ukusabalala kwe-filler, okwenza ngcono ukusebenza kokucubungula kanye nezakhiwo zokugcina zemishini.

Yiziphi izinsiza zokucubungula ezisebenza kahle kakhulu ekuxazululeni izinkinga zokucubungula kanye nekhwalithi yobuso bamakhemikhali e-polyolefin anamandla aphezulu e-ATH/MDH avimbela ilangabi ekusetshenzisweni kwemboni yekhebula?

Izithasiselo ezisekelwe ku-silicone kanye nezinsiza zokukhiqiza:

I-SILIKE inikeza izinto eziningi ezahlukeneizinsiza zokucubungula ezisekelwe ku-polysiloxanekokubili ama-thermoplastics ajwayelekile kanye namapulasitiki obunjiniyela, okusiza ekwenzeni ngcono ukucubungula nokuthuthukisa ukusebenza kwemikhiqizo eqediwe. Izixazululo zethu zisukela ku-silicone masterbatch ethembekile i-LYSI-401 kuya kusengezo se-SC920 esisha—esakhiwe ukuze sinikeze ukusebenza kahle okukhulu kanye nokuthembeka ekukhishweni kwekhebula le-LSZH elingenayo i-halogen kanye ne-HFFR LSZH.

Ngokuqondile,Izithasiselo zokucubungula amafutha ezisekelwe ku-silicone ze-SILIKE UHMWkuye kwafakazelwa ukuthi kunenzuzo kuma-polyolefin compounds e-ATH/MDH avimbela ilangabi ezintanjeni. Imiphumela ebalulekile ifaka:

1. Ukuncipha kokuqina kokuncibilika: Ama-polysiloxanes aya endaweni yokuncibilika ngesikhathi sokucubungula, akha ifilimu yokugcoba enciphisa ukungqubuzana nemishini futhi ithuthukise ukugeleza.

2. Ukusabalala Okuthuthukisiwe: Izithasiselo ezisekelwe ku-Silicon zikhuthaza ukusatshalaliswa okufanayo kwe-ATH/MDH ku-polymer matrix, zinciphisa ukuhlanganiswa kwezinhlayiya.

3. Ikhwalithi ephezulu yobuso:I-LYSI-401 i-silicone masterbatchkunciphisa ukwakheka kwama-die kanye nokuqhekeka kokuncibilika, okukhiqiza izindawo ezibushelelezi ze-extrudate ezineziphambeko ezimbalwa.

4. Isivinini somugqa esisheshayo:Usizo Lokucubungula I-Silicone SC920ifanelekela ukukhishwa kwezintambo ngesivinini esikhulu. Ingavimbela ukungazinzi kobubanzi bentambo kanye nokushelela kwezikulufo, futhi ithuthukise ukusebenza kahle kokukhiqiza. Ngesikhathi esifanayo sokusetshenziswa kwamandla, ivolumu yokukhishwa inyuke ngo-10%.

5. Izakhiwo ezithuthukisiwe zemishini: Ngokuthuthukisa ukusabalala kwe-filler kanye nokunamathelana kwe-interfacial, i-silicone masterbatch ithuthukisa ukumelana nokuguguleka okuhlanganisiwe kanye nokusebenza kwemishini, njengempahla yokushayisana kanye nobude ngesikhathi sokuphumula.

6. Ukusebenzisana okuvimbela ilangabi kanye nokucindezela intuthu: izithasiselo ze-siloxane zingathuthukisa kancane ukusebenza okuvimbela ilangabi (isb., ukwandisa i-LOI) futhi zinciphise ukukhishwa kwentuthu.

I-SILIKE ingumkhiqizi ohamba phambili wezithasiselo ezisekelwe ku-silicone, izinsiza zokucubungula, kanye nama-elastomer e-silicone e-thermoplastic esifundeni sase-Asia-Pacific.

Okwethuizinsiza zokucubungula i-siliconeZisetshenziswa kabanzi embonini ye-thermoplastics kanye neyekhebula ukuze kuthuthukiswe ukucubungula, kuthuthukiswe ukusabalala kokugcwalisa, kuncishiswe ukuncibilika, futhi kulethwe izindawo ezibushelelezi ngokusebenza kahle okuphezulu.

Phakathi kwazo, i-silicone masterbatch LYSI-401 kanye ne-SC920 silicone processing aid entsha kuyizixazululo eziqinisekisiwe ze-ATH/MDH flame-retardant polyolefin formulations, ikakhulukazi ku-LSZH kanye ne-HFFR cable extrusion. Ngokuhlanganisa izithasiselo nezinsiza zokukhiqiza ezisekelwe ku-silicone ze-SILIKE, abakhiqizi bangafinyelela ukukhiqizwa okuzinzile kanye nekhwalithi eqhubekayo.

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.