低煙無(wú)鹵電纜料造粒機(jī)
低煙無(wú)鹵造粒機(jī)|低煙無(wú)鹵電纜料造粒機(jī)
低煙無(wú)鹵電纜料造粒機(jī)組:
低煙無(wú)鹵造粒機(jī)|低煙無(wú)鹵電纜料造粒機(jī)
低煙無(wú)鹵電纜料造粒機(jī)組:
75升密練機(jī)--錐雙喂料機(jī)---150單螺桿---液壓自動(dòng)換網(wǎng)----風(fēng)冷磨面熱切-----旋風(fēng)分離器--------第二旋風(fēng)分離器---------加長(zhǎng)風(fēng)冷振動(dòng)篩----------料倉(cāng)；
低煙無(wú)鹵阻燃聚烯烴電纜料通常由聚烯烴共混樹(shù)脂加阻燃填充劑氫氧化鋁、氫氧化鎂和一些為了提高耐熱壽命而添加的適量抗氧劑組合而成。有時(shí)為了降低其燃燒時(shí)的發(fā)煙量，還加入了一些發(fā)煙抑制劑，如釩、鎳、鉬、鐵、硅、氮系化合物。
其阻燃機(jī)理為：燃燒時(shí)，阻燃填充劑氫氧化鋁、氫氧化鎂會(huì)釋放出結(jié)晶水，吸收大量熱量；與此同時(shí)，脫水反應(yīng)會(huì)產(chǎn)生大量水蒸汽，它可以稀釋可燃性氣體，從而阻止燃燒，另外會(huì)在材料表面形成一層不熔不燃的氧化物硬殼，阻斷了高聚物與外界熱氧反應(yīng)的通道，終材料阻燃、自熄。
低煙無(wú)鹵阻燃聚烯烴電纜料要具有較好的阻燃性，配方中氫氧化鋁、氫氧化鎂必須有較大的填充量，通常要達(dá)到150份以上，要密煉機(jī)把料子與無(wú)機(jī)物更好的相容在起;讓后用單螺桿冷卻造粒;這種設(shè)備做料分散;產(chǎn)量搞;能耗 低。
無(wú)鹵阻燃聚烯烴的發(fā)展前景
高倍膨脹(HEG)和低倍膨脹石墨(LEG )對(duì)LOPE極限氧指數(shù)的影響膨脹石墨的含量 從中可以看出，隨著膨脹石墨用量的增加，LLDPE的氧指數(shù)不斷提高，30%的HEG可以使純LLDPE的LOI從17.5上升到29. 6; HEG比LEG更加有效，這是因?yàn)樵诟邷叵拢琀EG生成的膨脹石墨體積比LEG的生成物體積大，占據(jù)較大的空間更有利于阻止聚合物裂解產(chǎn)生的可燃?xì)怏w進(jìn)入燃燒區(qū)域，并更有效地隔離氧可膨脹石墨的作用是物理機(jī)制，主要是致密的炭層形成物理隔離層，保護(hù)炭層下的聚合物，隔離熱量和質(zhì)量傳遞。
screw diameter:different models have different diameters
single screw motor :from 30-160kw
Low smoke zero halogen cable material granulator is will double screw speed, strong mixing with single screw at low speed, low temperature and weak combined shear properties, foster strengths and circumvent weaknesses, technology is a high degree of automation, assembly line, the distribution effect is excellent, high output, working condition of clean, is now the heat-sensitive, shear sensitive material of choice for efficient mixing modification with models.Low smoke zero halogen cable material granulator unique belt of the slide on the surface of blowing is eager to the nose, the nose section is cooled, single screw core is cooled, effectively prevent the phenomenon of clay in the process of production, production increased significantly.
granulating process:
kneader---conveyor---conical force feeder---single screw extruder---hot-face---Cutting assistant machine