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Intshayelelo: Ukusombulula Imingeni Yokucubungula Iikhompawundi zePolyolefin eziKhulu/eziBuyisela iLanga kwi-ATH/MDH

Kwishishini leentambo, iimfuno ezingqongqo zokuthintela umlilo zibalulekile ukuqinisekisa ukhuseleko lwabasebenzi nezixhobo xa kutsha. I-aluminium hydroxide (ATH) kunye ne-magnesium hydroxide (MDH), njengezinto ezithintela umlilo ezingenayo i-halogen, zisetyenziswa kakhulu kwiikhompawundi zentambo ze-polyolefin ngenxa yobuhlobo bazo nokusingqongileyo, ukukhutshwa komsi okuphantsi, kunye nokukhululwa kwegesi engaboliyo. Nangona kunjalo, ukufikelela ekusebenzeni okufunekayo kokuthintela umlilo kudla ngokufuna ukubandakanywa kwemithwalo ephezulu ye-ATH kunye ne-MDH—ngesiqhelo i-50–70 wt% okanye ngaphezulu—kwi-polyolefin matrix.

Nangona umxholo ophezulu kangaka wokuzalisa uphucula kakhulu ukulibaziseka komlilo, ukwazisa nemingeni enzima yokucubungula, kubandakanya ukwanda kokunyibilika, ukuncipha kokuhamba kwamanzi, iimpawu zoomatshini ezibuthathaka, kunye nomgangatho ophantsi womphezulu. Ezi ngxaki zinokuthintela kakhulu ukusebenza kakuhle kwemveliso kunye nomgangatho wemveliso.

Eli nqaku lijolise ekuhlolisiseni ngokucwangcisiweyo imingeni yokucubungula enxulumene neekhompawundi ze-polyolefin ezithintela ilangatye ze-ATH/MDH ezinomthwalo ophezulu kwizicelo zekhebula. Ngokusekelwe kwingxelo yemarike kunye namava asebenzayo,ichonga iyasebenzaukucubungulaizongezongenxaukujongana nale mingeni. Iingcinga ezinikiweyo zenzelwe ukunceda abavelisi beentambo kunye neentambo ukuba baphucule iindlela zokwenziwa kunye nokuphucula iinkqubo zemveliso xa besebenza ngeekhompawundi ze-polyolefin ezithintela ilangatye ezine-ATH/MDH.

Ukuqonda i-ATH kunye ne-MDH Flame Retardants

I-ATH kunye ne-MDH zizinto ezimbini eziphambili ezithintela ilangatye ezingaphiliyo, ezingenayo i-halogen ezisetyenziswa kakhulu kwizixhobo zepolymer, ngakumbi kwizicelo zekhebula apho imigangatho yokhuseleko kunye nokusingqongileyo iphezulu. Zisebenza ngokubola kwe-endothermic kunye nokukhululwa kwamanzi, zinyibilikisa iigesi ezinokutsha kwaye zenze umaleko we-oxide okhuselayo kumphezulu wezinto, othintela ukutsha kwaye unciphise umsi. I-ATH iyabola malunga ne-200–220°C, ngelixa i-MDH inobushushu obuphezulu bokubola obuyi-330–340°C, okwenza i-MDH ifaneleke ngakumbi kwiipolymers ezicutshungulwa kubushushu obuphezulu.

1. Iindlela ezithintela ilangatye ze-ATH kunye ne-MDH ziquka:

1.1. Ukubola kwe-Endothermic:

Xa kushushu, i-ATH (Al(OH)₃) kunye ne-MDH (Mg(OH)₂) zibola kwi-endothermic, zifunxa ubushushu obukhulu kwaye zehlise ubushushu be-polymer ukuze zilibazise ukonakala kobushushu.

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

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

1.2. Ukukhutshwa komphunga wamanzi:

Umphunga wamanzi okhutshiweyo uyayinciphisa igesi evuthayo ejikeleze i-polymer kwaye uthintela ukufikelela kwi-oksijini, uthintele ukutsha.

1.3. Ukwenziwa kweengqimba zokukhusela:

Ii-metal oxides eziphumayo (Al₂O₃ kunye neMgO) zidityaniswe nomaleko we-polymer char ukwenza umaleko okhuselekileyo, othintela ukungena kobushushu kunye ne-oxygen kwaye uthintele ukukhutshwa kweegesi ezinokutsha.

1.4. Ukuphelisa umsi:

Umaleko okhuselayo ukwafunxa amasuntswana omsi, nto leyo enciphisa uxinano lomsi ngokubanzi.

Nangona zisebenza kakuhle kakhulu ekuthinteleni ilangabi kunye neenzuzo zokusingqongileyo, ukufumana amanqaku aphezulu okuthintele ilangabi kudla ngokufuna i-50–70 wt% okanye ngaphezulu kwe-ATH/MDH, nto leyo ebangela imingeni yokucubungula elandelayo.
2. Imingeni ephambili yokucubungula iiPolyolefins ze-ATH/MDH ezithwala umthwalo ophezulu kwizicelo zekhebula

2.1. Iimpawu ze-rheological eziwohlokileyo:

Ukufakwa kwezambatho eziphezulu kwandisa kakhulu i-melt viscosity kwaye kunciphisa ukuhamba kwamanzi. Oku kwenza ukuba i-plasticization kunye nokuhamba kwamanzi kube nzima ngakumbi ngexesha lokukhupha, kufuna amaqondo obushushu aphezulu okucubungula kunye namandla okucheba, okwandisa ukusetyenziswa kwamandla kwaye kukhawulezise ukuguguleka kwezixhobo. Ukuhamba kwamanzi okuncitshisiweyo okuncitshisiweyo kukwanciphisa isantya sokukhupha kunye nokusebenza kakuhle kwemveliso.

2.2. Iipropati zoomatshini ezinciphileyo:

Izixa ezikhulu zezinto ezingezizo izinto eziphilayo ziyayinyibilikisa i-polymer matrix, nto leyo enciphisa kakhulu amandla okutsalwa, ukunwebeka xa kuqhekeka, kunye namandla okutsha. Umzekelo, ukufaka i-ATH/MDH engama-50% nangaphezulu kunokunciphisa amandla okutsalwa malunga nama-40% nangaphezulu, nto leyo ebeka umngeni kwizixhobo zekhebula eziguquguqukayo nezihlala ixesha elide.

2.3. Iingxaki zokusasazeka:

Amasuntswana e-ATH kunye ne-MDH adla ngokudibana kwi-polymer matrix, nto leyo ekhokelela kwiindawo zoxinzelelo, ukusebenza okunciphileyo koomatshini, kunye neziphene zokukhupha ezifana noburhabaxa bomphezulu okanye amaqamza.

2.4. Umgangatho ophantsi womphezulu:

Ukunyibilika okuphezulu, ukusasazwa okungekho mgangathweni, kunye nokuhambelana okulinganiselweyo kwe-filler-polymer kunokubangela ukuba iindawo eziphumayo zibe rhabaxa okanye zingalingani, nto leyo ekhokelela kwi-"sharkskin" okanye i-die build-up. Ukuqokelelwa kwi-die (die drool) kuchaphazela zombini ukubonakala kunye nemveliso eqhubekayo.

2.5. Iimpembelelo zepropathi yombane:

Umxholo ophezulu wokuzalisa kunye nokusasazwa okungalinganiyo kunokuchaphazela iipropati ze-dielectric, ezifana nokumelana nomthamo. Ngaphezu koko, i-ATH/MDH inomngxuma ophezulu wokufuma, nto leyo enokuchaphazela ukusebenza kombane kunye nokuzinza kwexesha elide kwiindawo ezifumileyo.

2.6. Ifestile yokucubungula encinci:

Uluhlu lobushushu bokucubungula iipolyolefins ezithintela ilangatye kakhulu luncinci. I-ATH iqala ukubola malunga ne-200°C, ngelixa i-MDH ibola malunga ne-330°C. Ulawulo lobushushu oluchanekileyo luyafuneka ukuthintela ukubola kwangethuba kunye nokuqinisekisa ukusebenza okuthintela ilangatye kunye nokuthembeka kwezinto.

Ezi ngxaki zenza ukuba ukucutshungulwa kwee-polyolefins ze-ATH/MDH ezinomthwalo ophezulu kube nzima kwaye kugxininisa imfuneko yezixhobo zokucubungula ezisebenzayo.

Ngoko ke, ukujongana nale mingeni, kuye kwaveliswa kwaye kwasetyenziswa izixhobo ezahlukeneyo zokucubungula kwishishini leentambo. Ezi zixhobo zinceda ukuphucula ukuhambelana kwe-polymer-filler interfacial, ukunciphisa i-melt viscosity, kunye nokuphucula ukusasazeka kwe-filler, ukuphucula ukusebenza kokucubungula kunye neempawu zokugqibela zoomatshini.

Zeziphi izixhobo zokucubungula ezisebenzayo kakhulu ekusombululeni imiba yokucubungula kunye nomgangatho womphezulu weekhompawundi ze-polyolefin ezithintela ilangatye ezithwala umthwalo ophezulu kwizicelo zoshishino lweentambo?

Izongezo ezisekelwe kwi-silicone kunye nezixhobo zokuvelisa:

I-SILIKE inikezela ngeendlela ezahlukeneyoizixhobo zokucoca ezisekelwe kwi-polysiloxanekwi-thermoplastics esemgangathweni kunye neplastiki yobunjineli, enceda ekwenzeni ngcono ukucubungula kunye nokuphucula ukusebenza kweemveliso ezigqityiweyo. Izisombululo zethu ziqala kwi-silicone masterbatch ethembekileyo i-LYSI-401 ukuya kwi-SC920 additive entsha—eyenzelwe ukunika ukusebenza kakuhle kunye nokuthembeka okukhulu kwi-LSZH ephezulu, engenalo i-halogen kunye ne-HFFR LSZH cable extrusion.

Ngokukodwa,Izongezo zokulungisa izithambiso ezisekelwe kwi-silicone ye-SILIKE UHMWziye zangqineka ziluncedo kwiikhompawundi ze-polyolefin ezithintela ilangatye ze-ATH/MDH kwiintambo. Iziphumo eziphambili ziquka:

1. Ukuncipha koburhabaxa bokunyibilika: Iipolysiloxanes ziya kumphezulu wokunyibilika ngexesha lokucubungula, zenze ifilimu yokuthambisa enciphisa ukungqubana nezixhobo kwaye iphucule ukuhamba kwamanzi.

2. Ukusasazwa okuphuculweyo: Izongezo ezisekelwe kwiSilicon zikhuthaza ukusasazwa okufanayo kwe-ATH/MDH kwi-polymer matrix, zinciphisa ukuhlanganiswa kwamasuntswana.

3. Umgangatho ophuculweyo womphezulu:I-LYSI-401 i-masterbatch ye-siliconekunciphisa ukwakheka kwe-die kunye nokuqhekeka kwe-melt, okuvelisa iindawo ezithambileyo ze-extrudate ezineziphene ezimbalwa.

4. Isantya somgca esikhawulezayo:Uncedo Lokucubungula I-Silicone SC920ifanelekile ekukhupheni iintambo ngesantya esiphezulu. Ingathintela ukungazinzi kobubanzi bentambo kunye nokutyibilika kwezikrufu, kwaye iphucule ukusebenza kakuhle kwemveliso. Ngaxeshanye ukusetyenziswa kwamandla, umthamo wokukhupha unyuke nge-10%.

5. Iipropati zoomatshini eziphuculweyo: Ngokuphucula ukusasazeka kwezamba kunye nokunamathelana phakathi kwe-interfacial, i-silicone masterbatch iphucula ukumelana nokuguguleka okuhlanganisiweyo kunye nokusebenza koomatshini, okufana nepropathi yempembelelo kunye nobude ngexesha lokuphazamiseka.

6. Ukusebenzisana okuthintela ilangabi kunye nokunciphisa umsi: izongezo ze-siloxane zinokuphucula kancinci ukusebenza okuthintela ilangabi (umz., ukwandisa i-LOI) kwaye kunciphise ukukhutshwa komsi.

I-SILIKE ngumvelisi ophambili wezongezo ezisekelwe kwi-silicone, izixhobo zokucubungula, kunye nee-elastomers ze-silicone ze-thermoplastic kummandla we-Asia-Pacific.

Zethuizixhobo zokulungisa i-siliconeZisetyenziswa kakhulu kwi-thermoplastics nakwii-cable industry ukuze kuphuculwe indlela yokucubungula, kuphuculwe ukusasazeka kwe-filler, kuncitshiswe ukunyibilika, kwaye kuhanjiswe iindawo ezithambileyo ngokusebenza kakuhle.

Phakathi kwazo, i-silicone masterbatch LYSI-401 kunye ne-SC920 silicone processing aid entsha zizisombululo eziqinisekisiweyo ze-ATH/MDH polyolefin formulations ezithintela ilangatye, ngakumbi kwi-LSZH kunye ne-HFFR cable extrusion. Ngokudibanisa izongezo kunye nezixhobo zokuvelisa ezisekelwe kwi-silicone ye-SILIKE, abavelisi banokufikelela kwimveliso ezinzileyo kunye nomgangatho ohambelanayo.

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.