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Product Description产品描述
W-7021 series are granular compounds which are manufactured through mixing, plasticizing and pelletizing processes. They regard advanced PVC resin as the basic raw materials, and add plasticizer, stabilizer and other accessory ingredients.
W-7021系列产品是以优质聚氯乙烯树脂为基料，加入增塑剂、稳定剂等助剂，经混合、塑化、造粒而成的粒状电缆料。
 
Characteristics and Application 特点及用途
These products have good mechanical and physical property, electrical property and excellent processing performance. They meet RoHS Standard and all their properties comply with GB/T 8815. They are suitable for the jacketing of 70℃cables.
产品具有良好的机械物理性能和电性能，加工性能优异，符合RoHS环保标准。性能符合GB/T 8815的要求，主要用于70℃耐温等级的电线电缆护套。
 
Processing Indicator加工工艺
Recommend to use single-screw extruders with L/D= 20-25.
建议使用普通长径比为20-25的单螺杆挤出机进行生产。

Model 牌号	Machine Barrel Temperature 机筒温度	Molding Temperature 机头温度
W-7021	145-165℃	165-175℃

 Physical and Electrical Properties
机械物理性能及电性能指标

Item 试验项目	Unit 单位	Technical Requirements 技术要求
		W-7021	W-7021-L6	W-7021-L7	W-7021-L8
Tensile Strength 拉伸强度	MPa	≥15.0	≥15.0	≥15.0	≥15.0
Elongation at Break 断裂伸长率	%	≥180	≥180	≥180	≥180
Thermal Deformation 热变形	%	≤50	≤50	≤50	≤50
Brittle Temperature with Impact 冲击脆化温度	℃	-25	-30	-35	-40
200℃Thermal Stability 200℃时热稳定时间	min	≥50	≥50	≥50	≥50
20℃Volume Resistivity 20℃时体积电阻率	Ω.m	≥1.0×108	≥1.0×108	≥1.0×108	≥1.0×108
Dielectric Strength 介电强度	MV/m	≥18	≥18	≥18	≥18
Thermal Aging 热老化试验	\	100±2℃×168h
Tensile Strength After Aging 老化后拉伸强度	MPa	≥15.0	≥15.0	≥15.0	≥15.0
Tensile Strength Variation 拉伸强度变化率	%	±20	±20	±20	±20
Elongation After Aging 老化后断裂伸长率	%	≥180	≥180	≥180	≥180
Elongation Variation 断裂伸长率变化率	%	±20	±20	±20	±20
Mass Losses 质量损失(100℃×168h)	g/m2	≤23	≤23	≤23	≤23