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Description and Application 产品描述和用途
EJW90, EJW90C, EJW90A are thermoplastic low-smoke halogen-free insulation compounds, which don’t contain any heavy metal like Pb, Ba, Cd, Cr, Sn and Sb. The properties can meet RoHS Standard. They have excellent mechanical and flame-retardant properties with temperature resistant from -40℃to 90℃. They are mainly used for the insulation of communication cables,control cables and power cables.
EJW90，EJW90C，EJW90A是热塑性低烟无卤绝缘料。不含Pb、Ba、Cd、Cr、Sn、Sb六大重金属。具有优异的物理机械性能和阻燃性能，可耐温-40℃～90℃，其性能均能满足RoHS的标准要求。主要用于通信电缆，控制电缆和电力电缆的绝缘层。
 
Processing Indicator 加工工艺
Recommend to use special screw for low-smoke halogen-free compound with L/D=20-25.
采用低烟无卤专用螺杆，长径比L/D=20-25。

Model 牌号	Machine Barrel Temperature 机筒温度	Molding Temprature 机头温度
EJW90/EJW90C/EJW90A	130-140℃	150-160℃

 
 
 
Physical and Electrical Properties   物理及电性能指标

Item 试验项目		Unit 单位	Specification 技术要求
			EJW90	EJW90C	EJW90A
Density 密度		g/cm3	≤1.5	≤1.5	≤1.55
Tensile Strength 拉伸强度		MPa	≥10	≥10	≥10
Elongation at Break 断裂伸长率		%	≥150	≥150	≥150
Aging Conditions 热老化条件		/	110℃×240h
Tensile Strength Variation 拉伸强度变化率		%	±25	±25	±25
Elongation Variation 断裂伸长率变化率		%	±25	±25	±25
Thermal Deformation 热变形	Condition	℃	90℃×6h
	Variation	%	≤50	≤50	≤50
Dielectric Strength 介电强度		MV/m	≥20	≥20	≥20
Brittle Temperature With Low Temperature Impact 冲击脆化温度		℃	-40	-40	-40
20℃Volume Resistivity 20℃体积电阻率		Ω.m	≥1.0×1012	≥1.0×1012	≥1.0×1012
Water Absorption吸水性实验 14 days at 70℃		mg/cm2	≤5	≤5	≤5
Oxygen Index 氧指数		%	≥32	≥36	≥38
HCL Gas Evolution HCL气体发生量		Mg/g	≤1.0	≤1.0	≤1.0
PH Value PH值		/	≥4.3	≥4.3	≥4.3
Smoke Density烟密度 – No-flame Mode无焰模式 – Flame Mode有焰模式		Ds max	≤200 ≤100	≤200 ≤100	≤200 ≤100
Conductivity 电导率		ｕS/mm	≤10	≤10	≤10
Toxicity Index 毒性指数		/	≤5.0	≤5.0	≤5.0

 
Attentions 注意事项：
1）The compound should be dried before using if the package is broken. Once package is open, recommend to run out within 12 hours.
原料破包需烘干后才能使用，材料一经开封，建议12小时之内用完。
2）Please ensure the screw, barrel, hopper are thoroughly cleaned before operation. Avoid bringing impurities while processing.
加工前确保螺杆、机筒、加料斗彻底清理干净，加工过程中严禁带入杂质。
3）If you need a faster extrusion. Please accelerate screw speed gradually to avoid inadequate plasticizing which may cause rough surface of the cables.
如果要快速挤出时，请慢慢逐渐加快螺杆转速，以免塑化不良，电缆表面毛糙。