Ethylene propylene rubber (EPR), omuli binary ethylene propylene rubber ne ternary ethylene propylene rubber (EPDM) ebika bibiri, ye saturated rubber, nga erimu okuziyiza amasannyalaze okulungi ennyo, obunnyogovu, ebbugumu, obuziyiza okukaddiwa, ekozesebwa nnyo mu kutegeka waya n’obuuma obukola cables, era nga kibadde alternative endala enzijuvu ku mubiri gwa styrene. With the increasingly high requirements of the laying environment, wire and cable are being developed towards low-smoke halogen-free flame retardant, with the same low-pressure grades of cross-linked polyethylene, EPR also belongs to the flammable materials, its own molecular composition and structure of the flame retardant performance has little effect, only with a considerable amount of flame retardant in order to achieve the purpose of flame retardant, so in order to make low-smoke Ebintu ebiziyiza ennimi z’omuliro ebitaliimu halogen bisobola okugattibwa ku kiraasi ya halogen yokka ey’ebiziyiza ennimi z’omuliro. Studies have shown that the electrical properties of EPDM is greatly affected by the flame retardant, just add 80 parts of hydroxide flame retardant will make the rapid decline in electrical resistivity, in order to achieve the IEC 60502 ((rated voltage of 1 ~ 30 kV extruded insulated cables and their accessories) standards in the EPR insulating rubber in the normal operation of the conductor at the highest temperature of the insulation resistance /> 3.67 MΩ -km ne volume resistivity ≥ 3.67 MΩ -km ne volume resistivity ≥ 3.67 mω -km ne volume resistivity ≥ 3.67 mΩ -km n’obuziyiza bwa voliyumu ≥ 1 × 1012 Ω - cm. Okwokya okugezesa, waliwo obuzibu obw’amaanyi. Okunoonyereza n’okukola enkola empya ez’okufulumya, kisoboka okutuukiriza ebisaanyizo ebyo waggulu.
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Amaanyi g’okusika kw’ekintu ekiziyiza EPDM ekikozesa magnesium hydroxide ge gasinga obunene, okusinga olw’okuba nti .
Magnesium hydroxide ye kirisitaalo eringa empiso, obunene bw’obutundutundu obutono okusinga 2μm, era okuyita mu kukyusa silane coupling agent okutumbula amaanyi g’okusiba n’okukwatagana kwa magnesium hydroxide ne EPDM. By comparing the oxygen index and vertical combustion grade, it can be seen that the flame retardant effect of magnesium hydroxide is significantly better than that of aluminum hydroxide, this is due to the thermal decomposition temperature of magnesium hydroxide is higher than that of aluminum hydroxide by 140 ℃, which avoids dehydration reaction occurring in advance due to the high temperature of the processing process, moreover magnesium hydroxide will form a layer of oxidized film adsorbed on the surface of the adhesive material after dehydration and promote the formation of charcoal, which will form a layer of hard shell on the surface of the adhesive material In addition, after dehydration, magnesium hydroxide will form a layer of oxidized film adsorbed on the surface of rubber material, and promote the formation of carbon, forming a hard shell on the surface of rubber material, effectively isolating oxygen, thus improving the flame retardant system. Comparison of volume resistivity can be concluded, aluminum hydroxide on the EPDM insulation rubber Ethylene propylene rubber (EPR), including binary ethylene propylene rubber and ternary ethylene propylene rubber (EPDM) two categories, is a saturated rubber, with excellent electrical insulation, moisture, heat, cold and aging resistance, is widely used in the preparation of wires and cables, and has been a comprehensive alternative to the main Omubiri gwa styrene-butadiene omupiira nga cable insulation material. With the increasingly high requirements of the laying environment, wire and cable are being developed towards low-smoke halogen-free flame retardant, with the same low-pressure grades of cross-linked polyethylene, EPR also belongs to the flammable materials, its own molecular composition and structure of the flame retardant performance has little effect, only with a considerable amount of flame retardant in order to achieve the purpose of flame retardant, so in order to make low-smoke Ebintu ebiziyiza ennimi z’omuliro ebitaliimu halogen bisobola okugattibwa ku kiraasi ya halogen yokka ey’ebiziyiza ennimi z’omuliro. Studies have shown that the electrical properties of EPDM is greatly affected by the flame retardant, just add 80 parts of hydroxide flame retardant will make the rapid decline in electrical resistivity, in order to achieve the IEC 60502 ((rated voltage of 1 ~ 30 kV extruded insulated cables and their accessories) standards in the EPR insulating rubber in the normal operation of the conductor at the highest temperature of the insulation resistance /> 3.67 MΩ -km ne volume resistivity ≥ 3.67 MΩ -km ne volume resistivity ≥ 3.67 mω -km ne volume resistivity ≥ 3.67 mΩ -km n’obuziyiza bwa voliyumu ≥ 1 × 1012 Ω - cm. Okwokya okugezesa, waliwo obuzibu obw’amaanyi. Okunoonyereza n’okukola enkola empya ez’okufulumya, kisoboka okutuukiriza ebisaanyizo ebyo waggulu.
1. Enkola y’ekika ky’ennimi z’omuliro ekitali kya kiramu ku nkola y’okukola kw’omukka omutono ogutaliimu mukka gwa halogen EPDM insulation rubber material .
Amaanyi g’okusika (tensile strength) ag’ekintu ekinyweza EPDM ne magnesium hydroxide ge gasinga obunene, okusinga olw’ensonga nti magnesium hydroxide ye kirisitaalo eringa empiso, obunene bw’obutundutundu obutono okusinga 2μm, n’okuyita mu kukyusa silane coupling agent okutumbula amaanyi agasiba n’okugerageranya kwa magnesium hayidirokisayidi ne EPDM. By comparing the oxygen index and vertical combustion grade, it can be seen that the flame retardant effect of magnesium hydroxide is significantly better than that of aluminum hydroxide, this is due to the thermal decomposition temperature of magnesium hydroxide is higher than that of aluminum hydroxide by 140 ℃, which avoids dehydration reaction occurring in advance due to the high temperature of the processing process, moreover magnesium hydroxide will form a layer of oxidized film adsorbed on the surface of the adhesive material after dehydration and promote the formation of charcoal, which will form a layer of hard shell on the surface of the adhesive material In addition, after dehydration, magnesium hydroxide will form a layer of oxidized film adsorbed on the surface of rubber material, and promote the formation of carbon, forming a hard shell on the surface of rubber material, effectively isolating oxygen, thus improving the flame retardant system. Okugerageranya obuziyiza bwa voliyumu kuyinza okumalirizibwa, aluminiyamu hydroxide ku EPDM insulation rubber material amasannyalaze insulation omulimu gw’okukuba mutono nnyo okusinga magnesium hydroxide, kino kiri bwekityo kubanga ATH 104e conductivity tesukka 60 ps-cm ~; ne magnesium hydroxide owabulijjo, gamba ng’ebika by’enkola y’okukola eby’obugagga eby’omu ttaka, olw’ensibuko y’omunda ey’enkola y’ekirombe, obucaafu obw’amaanyi, obulongoofu obutono, ng’oggyeeko kungulu kwayo nga biriko ekisannyalazo ekirungi, polarity enkulu, okunyigirizibwa okw’omunda okwa microscopic, olwo obutambuzi ne buba okutuuka ku 250 ps-cm. 1 oba okusingawo, omuwendo omunene ogwa magnesium hydroxide ogwongerwa ku kintu kya kapiira ka EPDM kijja kufuula eby’okuziyiza eby’ekintu kya kapiira okukendeera ennyo, wadde nga magnesium hydroxide oluvannyuma lw’okulongoosa okw’enjawulo okw’okukyusa ku ngulu kuyinza okulongoosa eby’obutonde eby’ekintu kya kapiira, naye ebivuddemu bikyali tebirina mugaso. Okulowooza ku bungi bwe bumu obwa magnesium hydroxide erina eby’obugagga ebirungi eby’okuziyiza ennimi z’omuliro okusinga aluminiyamu hydroxide, ffe abakola magnesium hydroxide balongoosa awamu ebiraga eby’omubiri ebya magnesium hydroxide, ebika by’ebikyusa eby’okungulu n’enkola z’okufulumya, n’ebirala, era bivaamu ebika bibiri ebya magnesium hayidirokisaayidi ebisaanira okukola epdm ne Mhh3005 ne mhh3005.
MH3005 ne MH3005Z EPDM insulating rubber zirina high volume resistivity, nga ku zino insulating core ekoleddwa mu MH3005Z rubber okusinga etuukiriza ebisaanyizo bya IEC 60502, naye insulating properties za MH3005 rubber ziri waggulu nnyo. Naye, omulimu gw’okuziyiza (insulation performance) ogw’omusingi ogwakolebwa mu kapiira ka MH3005 guba mutono nnyo, era kiteeberezebwa nti ensengekera y’okungulu ey’omutwe gwayonoonebwa mu nkola y’okufukirira mu nkola y’okufukirira, era ensonga yeetaaga okwongera okunoonyezebwa.
Overall, compared with the EPDM insulation rubber with modified magnesium hydroxide alone and EPDM insulation rubber with aluminum hydroxide alone, the former has good flame retardant property, high tensile strength, and better insulating property after special surface modification, but there is still a risk of degradation of insulating property in the insulating wire core, while the insulating property of aluminum hydroxide is better, and its resistivity can meet the requirements even without modification.
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Single use of magnesium hydroxide or aluminum hydroxide inorganic flame retardant can not simultaneously meet the requirements of the electrical properties and flame retardant properties, so the aluminum hydroxide and magnesium hydroxide and its effect on the performance of low-smoke halogen-free flame-retardant EPDM insulating adhesive, ATH 104E and MH3005Z dosage of a total of 120 parts, with Okweyongera mu ddoozi ya MH3005Z, obuzito bw’Abameni n’amaanyi g’okusika kw’ekyesiiga ekiziyiza EPDM okweyongera, eby’obugagga ebiziyiza ennimi z’omuliro byeyongera, obuziyiza bwa volume bwakendeera. Olw’okweyongera kwa MH3005Z, obuzito bw’Abameni n’amaanyi g’okusika kw’ekiziyiza kya EPDM kyeyongera, eky’obugagga ekiziyiza ennimi z’omuliro kyeyongera, era obuziyiza bw’obuzito bukendeera. Omugerageranyo gwa ATH 104E/MH3005Z bwe guba 90/30, eby’obugagga ebiziyiza ennimi z’omuliro n’eby’okuziyiza ennimi z’omuliro ebya EPDM insulating adhesive bituukiriza ebisaanyizo. Okugerageranya ATH 104E / MH3005Z n’omugerageranyo gwa 110 / 10 ne 120 / lo cases bbiri, wadde nga okweyongera kw’ebitundu 10 ebya ATH 104E oluvannyuma lwa EPDM insulation adhesive flame retardant properties kulongooseddwa, naye eby’omubiri eby’okukendeera amangu. LATH 104E / MH3005Z n’omugerageranyo gwa 70 / 50 ne 70 / 40 emisango ebiri, gikendeeza ku bitundu 10 ebya MH3005Z wadde nga kisobola okulongoosa eby’obugagga eby’okuziyiza (insulation properties) ebya kapiira, naye eby’obugagga ebiziyiza ennimi z’omuliro tebituukana na byetaago. Okusobola okukakasa eby’obugagga ebiziyiza ennimi z’omuliro, omuwendo gwonna ogw’ekiziyiza ennimi z’omuliro teguyinza kukendeezebwa.
EPDM insulation rubber material flameless smoke density eri 355 oba bwe zityo, n’obungi bw’okuziyiza ennimi z’omuliro ezitali za kiramu era nga tewali nkolagana eyeeyolese n’omugerageranyo, kino kiva ku nkola y’ebitundu byonna, okutondebwa kw’omukka okusinga ku EPDM, wadde nga ekiziyiza ennimi z’omuliro ekitali kya kiramu kisobola okulongoosa ennimi z’omuliro ekiziyiza ekikomo, era tekikola mukka gwa mukka, naye tekiyinza kukendeeza ku kiwujjo kya rubber ekiziyiza ekitangaala ekiziyiza ekiwujjo.
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JB / T 10707 - 2007 'thermoplastic halogen-free low-smoke flame retardant cable materials' kyetaagisa nti flameless smoke density y'ekintu kya kapiira tesaana kusukka 250, okusobola okukendeeza ku mukka gw'ekintu kya kapiira gulina okugattibwa ku mukka okunyigiriza. Montmorillonite erimu calcium-based, sodium-based, magnesium-based montmorillonite, oluvannyuma lw’okuggyako n’okusaasaana, okulongoosa n’okukyusibwa, special organic composite, obuwanvu bwa wakati bwa layeri buba wansi wa 25 nm. Montmorillonite esunsulwa okutuuka ku mukka omulungi.
montmorillonite ku EPDM insulation rubber material smoke density of the impact yeeyoleka nnyo, naye era eyinza okuba okweyongera okutono mu flame retardant properties, ate eby’obugagga ebirala birina impact ntono; Nga obungi bwa montmorillonite, EPDM insulation rubber material smoke density bukendeera mpolampola, era butera okutebenkera, nga tutunuulira ensonga z’omuwendo, londa omuwendo gwa montmorillonite okumala ebitundu 5.
4 Okumaliriza .
(1) Mu halogen-free low-smoke flame retardant EPDM insulating adhesive, ekikolwa ky’okuziyiza ennimi z’omuliro ekya magnesium hydroxide ekyusiddwa n’eddagala lye limu lisinga erya aluminium hydroxide, naye magnesium hydroxide erina kinene ky’ekola ku nkola y’okuziyiza amasannyalaze.
(2) Aluminium hydroxide ne magnesium hydroxide era nga zirina omugerageranyo gwa 90 / 30, omukka omutono ne halogen-free flame retardant EPDM insulation adhesive material erina obulungi flame retardant properties and insulation properties.
(3) Okukozesa montmorillonite kiyinza bulungi okukendeeza ku bungi bw’omukka gw’ekirungo ekiziyiza ennimi z’omuliro ekitaliimu mukka gwa smoke omutono EPDM insulation adhesive, naye olw’eddagala lyayo okweyongera, omukka gw’ekizigo gukendeera mpola, era omuwendo ogusinga obulungi ogwa montmorillonite guli 5 ebitundu 5.
