Purell PE 3020 D is a low density polyethylene with high rigidity, good opticals and good chemical resistance. It is delivered in pellet form. The grade is used by our customers for small blow mouldings including packaging of pharmaceuticals in blow fill seal technology and injection moulding for medical devices, closures and seals.Without exception, all potential activities for applications in the pharmaceutical, medical device, laboratory and diagnostics area have to be discussed with the relevant Technical (P AD) and Business contacts first.

To discuss a medical/pharmaceutical application please contact: your local Distributor or your local Basell contact.

LDPE特性与应用:

LDPE分子链上有长短支链，结晶度较低，分子量一般在5~50万，一种乳白色呈半透明的腊状固体树脂，无毒，软化点较低，柔韧性好，抗冲击韧性，耐低温性很好，可在-60~-80度下工作，电绝缘性优秀。LDPE的机械强度较差，耐热性不高，抗环境应力开裂性、粘附性、印刷性较差，许经过表面处理改善其性能。LDPE的吸水性很低，几乎不吸水，化学稳定性优秀，如对酸、碱、盐、有机溶剂都较稳定。对二氧化碳、有机臭气渗透性大，但对水蒸气、空气渗透性差。易燃烧，燃烧有石蜡味，在日光和热作用下容易老化降解而变色。LDPE适合热塑性成型加工的各种成型工艺，成型加工性好，如注塑、挤塑、吹塑、旋转成型、涂覆、发泡工艺、热成型、热封焊、热焊接等。LDPE主要的用途是用于薄膜产品，如农业用薄膜、地面覆盖薄膜、农膜、蔬菜大棚膜；包装用膜如糖果、蔬菜、冷冻食品等包装；液体包装用如吹塑薄膜；重包装袋、收缩包装袋、一般工业包装薄膜和食品袋等等。还可用于注塑制品；挤塑管材、电线电缆；吹塑中空容器。LDPE加工方式:温度设定：射嘴140~190度、前段140~200度、中段135~195度、后段130~180度；螺杆转速210~220rpm、模具温度10~70度、料管温度150~210度、背压5-10KG、模温30~50度、射出压力360~500kg/平方.

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