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 body of styrene-butadiene rubber as the 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 Mabalin laeng a mainayon dagiti awanan halogen a materiales a retardant iti gil-ayab iti klase ti halogen-free a flame retardant. 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 ken tomo a resistivity ≥ 3.67 MΩ -km ken tomo a resistivity ≥ 3.67 MΩ -km ken tomo a resistivity ≥ 3.67 MΩ -km. Ti panagsubok ti panaguram, adda ti nangato a tukad ti rigat. Ti panagsirarak ken panagdur-as dagiti baro a pamay-an ti produksion, mabalin a matungpal dagiti kasapulan iti ngato.
1 Ti epekto dagiti inorganiko a kita ti gil-ayab a retardant iti panagaramid ti nababa ti asukna a halogen-free a flame retardant EPDM a mangisalakan a goma a material .
Ti tensile strength ti EPDM insulating adhesive material nga addaan iti magnesium hydroxide ti kadakkelan, kangrunaanna gapu iti kinapudno a .
Ti magnesium hydroxide ket kasla dagum a kristal, kadakkel ti partikulo a basbassit ngem 2μm, ken babaen ti pannakabalbaliw ti silane coupling agent tapno mapasayaat ti panagsilpo a puersa ken panagtunos ti magnesium hydroxide ken 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 Ti pelikula a naadsorbo iti rabaw ti agdekket a material kalpasan ti pannaka-dehydrate ken itandudo ti pannakaporma ti uring, a mangporma iti maysa a suson ti natangken a shell iti rabaw ti agdekket a material a mainayon, kalpasan ti pannaka-dehydrate, ti magnesium hydroxide ket mangporma ti maysa a suson ti na-oksida a pelikula a naadsorbo iti rabaw ti rabaw ti apuy, ken maitandudo ti pannakaporma ti karbon, a mangporma ti natangken a shell iti rabaw ti goma. 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 bagi ti styrene-butadiene rubber kas ti 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 Mabalin laeng a mainayon dagiti awanan halogen a materiales a retardant iti gil-ayab iti klase ti halogen-free a flame retardant. 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 ken tomo a resistivity ≥ 3.67 MΩ -km ken tomo a resistivity ≥ 3.67 MΩ -km ken tomo a resistivity ≥ 3.67 MΩ -km. Ti panagsubok ti panaguram, adda ti nangato a tukad ti rigat. Ti panagsirarak ken panagdur-as dagiti baro a pamay-an ti produksion, mabalin a matungpal dagiti kasapulan iti ngato.
1. Impluensia ti inorganiko a gil-ayab a retardant a kita iti panagaramid ti nababa nga asuk a halogen-free a gil-ayab a retardant EPDM insulation a goma a material .
Ti tensile strength ti EPDM insulating adhesive material nga addaan iti magnesium hydroxide ket isu ti kadakkelan, a nangruna gapu ti kinapudno a ti magnesium hydroxide ket kasla dagum a kristal, kadakkel ti partikulo a basbassit ngem 2μm, ken babaen ti pannakabalbaliw ti silane coupling agent tapno mapasayaat ti panagsilpo a puersa ken panagtunos ti magnesium hydroxide ken 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 Ti pelikula a naadsorbo iti rabaw ti agdekket a material kalpasan ti pannaka-dehydrate ken itandudo ti pannakaporma ti uring, a mangporma iti maysa a suson ti natangken a shell iti rabaw ti agdekket a material a mainayon, kalpasan ti pannaka-dehydrate, ti magnesium hydroxide ket mangporma ti maysa a suson ti na-oksida a pelikula a naadsorbo iti rabaw ti rabaw ti apuy, ken maitandudo ti pannakaporma ti karbon, a mangporma ti natangken a shell iti rabaw ti goma. Ti panagidilig ti tomo a resistivity ket mabalin a maileppas, aluminium hydroxide iti EPDM insulation goma a material nga elektrikal nga insulasion a panagaramid ti impakto ket basbassit nga amang ngem ti magnesium hydroxide, daytoy ket gapu ta ti ATH 104E a konduktibidad ket saan a nasursurok ngem 60 ps-cm ~; ken dagiti gagangay a magnesium a hidroksida, a kas dagiti barayti ti mineral a pamay-an ti panagpataud, gapu ti domestiko a taudan ti impluensia ti pagminasan, nangato a linaon ti rugit, nababa a kinadalus, malaksid ti rabawna nga addaan iti positibo a karga, nangato a polarida, mikroskopiko nga akin-uneg a panagbannog, isu a ti konduktibidad ket aginggana ti 250 ps-cm. 1 wenno ad-adu pay, ti dakkel a bilang dagiti magnesium hydroxide a nainayon iti EPDM a goma a material ket mangaramidto kadagiti insulating properties ti goma a tagikua a bimmaba unay, nupay ti magnesium hydroxide kalpasan ti naisangsangayan a pannakaagas ti rabaw a panangagas ket mabalin a mangpasayaat kadagiti insulating a tagikua ti goma a material, ngem dagiti resulta ket saan pay laeng a nasayaat. No panunoten ti isu met laeng a kaadu ti magnesium hydroxide nga addaan kadagiti nasaysayaat a tagikua ti flame retardant ngem dagiti agar-aramid ti aluminio a hidroksida, dakami ken magnesium hydroxide ket agtitinnulongda a mang-optimize kadagiti pisikal a mangipakita ti magnesium hydroxide, dagiti barayti ti surface modifiers ken dagiti pamay-an ti panagpataud, kdpy.
Ti MH3005 ken MH3005Z EPDM insulating rubber ket addaan iti nangato a tomo a resistivity, a ti insulating core a naaramid iti MH3005Z a goma ket kangrunaan a makasangpet kadagiti kasapulan ti IEC 60502, ngem dagiti insulating properties ti MH3005 a goma ket relatibo a nangato. Nupay kasta, ti panagaramid ti insulasion ti puso a naaramid iti MH3005 a goma ket relatibo a nababa, ken daytoy ket nakarkulo a ti rabaw nga estruktura ti puso ket nadadael idi las-ud ti proseso ti panagbulkanisasion ti panagibukbok, ken ti rason ket kasapulan nga ad-adda pay a masukisok.
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.
2. Ti epekto dagiti inorganiko a flame retardant iti panagaramid ti nababa ti asukna, awan halohenona a flame retardant EPDM insulating adhesives .
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 Ti panagngato ti dosis ti MH3005Z, ti menni viscosity ken tensile strength ti EPDM insulating adhesive ket immadu, immadu dagiti flame retardant properties, bimmaba ti volume resistivity. Iti panagadu ti MH3005Z, ti menni viscosity ken tensile strength ti EPDM insulating adhesive ket dumakkel, ti gil-ayab a retardant a tagikua ket dumakkel, ken ti volume resistivity ket bumassit. No ti ratio ti ATH 104E/MH3005Z ket 90/30, dagiti insulating ken flame retardant properties ti EPDM insulating adhesive ket makasangpet kadagiti kasapulan. Ti panagidilig ti ATH 104E / MH3005Z ken ti ratio a 110 / 10 ken 120 / lo dua a kaso, urayno ti panagadu ti 10 a paset ti ATH 104E kalpasan ti EPDM nga insulasion a tagikua ti adhesive flame retardant ket napasayaaten, ngem dagiti pisikal a tagikua ti napardas a panagbaba. Lath 104E / MH3005Z ken ti ratio a 70 / 50 ken 70 / 40 dua a kaso, pabassiten ti 10 a paset ti MH3005z nupay mabalin a pasayaatenna dagiti tagikua ti insulasion ti goma, ngem dagiti tagikua ti flame retardant ket saan a makasangpet kadagiti kasapulan. Tapno masigurado ti flame retardant properties, saan a mabalin a mapabassit ti dagup a kaadu ti flame retardant.
EPDM insulation rubber material flameless smoke density are 355 or so, with the amount of inorganic flame retardant and with no obvious relationship with the ratio, this is because of the formula of all components, the formation of smoke is mainly EPDM, although the inorganic flame retardant can improve the flame retardant properties, and also does not produce smoke, but can not reduce the smoke released by the rubber matrix material combustion.
3. Asuk a mangkissay iti ahente iti panagaramid ti nababa ti asukna a halogen-free a flame-retardant EPDM insulating compound .
JB / T 10707 - 2007 'Termoplastic halogen-free low-smoke flame retardant cable materials' ket agkasapulan a ti awan gil-ayab a densidad ti asuk ti goma a material ket saan koma a dakdakkel ngem 250, tapno mapabassit ti densidad ti asuk ti material ti goma a masapul a mainayon iti asuk a manglapped. Ti Montmorillonite ket aglaon ti calcium-based, sodium-based, magnesium-based a Montmorillonite, kalpasan ti panaguksob ken panagiwaras, panagdalus ken panagbalbaliw, espesial nga organiko a kompuesto, ti promedio a kapuskol ti suson ket basbassit ngem 25 nm. Ti Montmorillonite ket napili tapno magun-od ti nasaysayaat nga epekto ti asuk.
Montmorillonite iti EPDM insulation goma a material nga asuk a densidad ti impakto ket nalawag unay, ngem mabalin pay a bassit a panagadu dagiti tagikua ti flame retardant, bayat a dagiti dadduma a tagikua ket basbassit ti epektona; Iti panagadu ti kaadu ti montmorillonite, ti EPDM insulation goma a material a densidad ti asuk ket in-inut a bimmaba, ken aggargaraw a mapatalged, a mangikonsidera kadagiti banag ti gastos, agpili ti kaadu ti montmorillonite para iti 5 a paset.
4 Konklusion .
(1) Iti halogen-free a nababa nga asuk a flame retardant EPDM insulating adhesive, ti flame retardant nga epekto ti nabaliwan a magnesium hydroxide nga addaan iti isu met laeng a dosis ket nasaysayaat ngem ti aluminium hydroxide, ngem ti magnesium hydroxide ket addaan iti dakdakkel nga epekto kadagiti elektrikal nga insulation properties.
(2) Aluminium hydroxide ken magnesium hydroxide ken addaan iti ratio a 90 / 30, nababa nga asuk ken halogen-free flame retardant EPDM insulation adhesive material ket addaan iti nasayaat a flame retardant properties ken insulation properties.
(3) Ti panagusar ti montmorillonite ket epektibo a mangkissay ti densidad ti asuk ti nababa nga asuk a haloheno-awanan iti flame retardant EPDM insulation adhesive, ngem babaen ti panagadu ti dosisna, ti densidad ti asuk ti agdekket ket bumassit nga in-inut, ken ti kasayaatan a dosis ti Montmorillonite ket 5 a paset.
