CN108081732A - 一种多层复合防静电材料及其制备方法 - Google Patents

一种多层复合防静电材料及其制备方法 Download PDF

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CN108081732A
CN108081732A CN201711341334.5A CN201711341334A CN108081732A CN 108081732 A CN108081732 A CN 108081732A CN 201711341334 A CN201711341334 A CN 201711341334A CN 108081732 A CN108081732 A CN 108081732A
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antistatic
foam
preparation
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石洪军
彭华
白亮亮
张波
危成亮
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Shenzhen Changyuan Tefa Technology Co Ltd
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Abstract

本发明提供了一种多层复合防静电材料及其制备方法,所述制备方法包括:(1)将聚乙烯主料、聚烯烃改性剂、炭黑、发泡剂和辅料混合造粒、然后母粒用单螺杆挤出成片材、其片材经过电子加速器辐射,最后经过发泡炉发泡成聚乙烯防静电泡棉;(2)将聚乙烯防静电泡棉用淋膜挤出机在防静电泡棉一侧淋一层导电膜;(3)防静电泡棉的另一侧与防静电基材背胶贴合,得到多层复合防静电材料(防静电泡棉在中间层),该复合材料表皮质感好,止滑,耐磨、不析出粉尘、防静电性能稳定,隔热,隔音,缓冲好,易成型,可以广泛的应用于电子产品的周转、包装等领域。

Description

一种多层复合防静电材料及其制备方法
技术领域
本发明属于复合材料技术领域,特别涉及一种多层复合防静电材料及其制备方法。
背景技术
多层复合防静电材料是一种新型的环保材料,由于其毒性小、气味较低、耐酸/碱腐蚀,耐高温,耐磨、止滑、永久防静电、净化程度高、缓冲性能好,可随意调整防静电性能、软硬度和厚度,重量轻等特点,是其他发泡棉类材料和塑胶片材无可取代的,可切割、热压成型及后加工,适用于包装材料、缓冲防护材料、产品周转材料等领域。但因为目前国内的发泡类材料不同程度上存在有异味、析出粉尘、不耐刮、硬度有限等特性,而塑胶片材,如PP、PVC、PET、PS等无法兼顾硬度、韧性、防静电及缓冲性能,限制了其其在物流、周转领域的运用,所以开发一款可同时满足防静电、止滑、耐磨、环保健康的材料在未来具有很大的竞争力,具有很好的市场前景。
现有技术主要存在的缺陷在于:
1、防静电片材材料是单层的,容易掉屑掉色;
2、防静电片材材料弹性差,不抗震,不缓冲;
3、防静电材料片材止滑性能差,没有光泽感。
发明内容
鉴于现有技术存在的问题,本发明提供了一种多层复合防静电材料及其制备方法,所述制备方法包括:
(1)将聚乙烯主料、聚烯烃改性剂、炭黑、发泡剂和辅料混合造粒、然后母粒用单螺杆挤出成片材、其片材经过电子加速器辐射,最后经过发泡炉发泡成聚乙烯防静电泡棉;
(2)将聚乙烯防静电泡棉用淋膜挤出机在防静电泡棉一侧淋一层导电膜;
(3)防静电泡棉的另一侧与防静电基材背胶贴合,得到多层复合防静电材料。
优选方案之一为:在此制备方法基础上进行多层复合防静电材料的开发,确定聚乙烯防静电泡棉原料种类、导电膜的成分、胶的种类和防静电片材种类等。
在防静电泡棉原料种类选择上,根据造粒和挤出设备条件,选定了适合的低密度聚乙烯(LDPE)(密度范围为200~45Kg/m3)为主料;通过重要指标溶体指数(1.0-2.0g/10min),确定了低密度聚乙烯的型号;为了降低泡棉的电阻值,使泡棉达到防静电效果,添加一定比例的导电炭黑;为了降低发泡温度,提高IXPE卷材在发泡炉中的力学性能,采用添加ZnSt、ZnO;为了提高防静电泡棉产品的热稳定性,采用添加抗氧剂1010和DSTP。
根据导电膜具备防静电功能,添加一定导电炭黑;为了能很好的与泡棉淋膜,选取低密度聚乙烯(LDPE)(熔融指数为1~2g/10min);为了提高导电膜流动性,添加一定比例线性低密度聚乙烯(LLDPE)(熔融指数为6~8g/10min)和茂金属线性低密度聚乙烯(MLLDPE)(熔融指数为7~20g/10min);为了改善导电膜的韧性,采用添加PPA。
根据胶粘性好、环保和耐高温等性能,胶的种类为油性溶剂不干胶、水性溶剂不干胶、热熔性溶剂不干胶中一种或者多种。根据复合材料的用途,防静电基材种类采用为PET、ABS、PP、PVC、PMMA片材中一种或者多种。
优选方案之一为:通过前述产品要求及方法,优选得到以下产品配方,包括:
在防静电配方选择上,通过合适熔体指数聚乙烯(LDPE)主料、EVA、AC发泡剂、助发泡剂(ZnO、ZnSt)和抗氧剂辅料比例、与不同导电炭黑添加配比对泡棉表面电阻、密度、表皮、泡孔和力学性能影响关系,确定各种不同表面电阻值等防静电泡棉的配方。
具体地,聚乙烯防静电泡棉组成为:添加质量比例56-83.3%的LDPE、5-15%的EVA、6~8%的导电炭黑、5-15%的AC发泡剂、0.5-1.0%的ZnO、1.0-2.0%的ZnSt、0.2-3%的抗氧剂1010与DSTP,各材料质量百分比之和为100%。
所述防静电泡棉原料和比例选择依据为,LDPE是主料,添加量较多;AC发泡剂是偶氮二甲酰胺,直接影响泡棉密度;导电炭黑作为防静电剂,导电性能优异,能大量降低泡棉电阻值;少量EVA能增加炭黑与LDPE相容性;少量发泡助剂能降低发泡温度,使泡孔细腻;抗氧剂辅料主要使泡棉不易氧化,延长泡棉的保质期;不在所述比例里有如下一些影响:(1)导电炭黑加入过多,与LDPE不相容,导致片材无法发泡成泡棉;(2)导电炭黑加入过少,导致泡棉是绝缘材料。
所述导电膜原料和比例选择依据为,PE塑料是主料,添加量多;导电炭黑作为防静电剂,导电性能优异,能大量降低PE薄膜的电阻值;少量的助剂PPA能很好的改善膜的韧性。
导电膜组成为:添加质量比例30~40%的LDPE、22~47.5%的LLDPE、20~30%的MLLDPE、2~6%的导电炭黑和0.5~2%的PPA助剂,各材料质量百分比之和为100%。
防静电泡棉一侧与导电膜贴合,另一侧与防静电基材贴合为此种多层复合防静电材料独特的关键点,以下是对其生产工艺研究。
更为优选方案之一为通过前述产品要求及产品配方优选得到多层复合防静电材料的具体生产工艺。
优选的生产流程包括:
优选的混炼造粒工艺包括:
导电炭黑为黑色防静电剂,在聚乙烯中的分散状态直接影响泡棉泡电阻。为了实现导电炭黑同两种不同种类聚乙烯PE主、辅料等物料均匀混合的目的,必须先把物料进行混炼。
具体地,优选在一定温度(120~140℃)下,一定共混时间(8~12min)下,加入不同比例的AC发泡剂,助发泡剂、低密度聚乙烯(LDPE),EVA和抗氧剂密炼造粒。
在优选的温度和时间条件下,使产品塑化更好,母粒性能更好。不再所述范围内会产生如下影响:(1)温度偏高、时间较长发泡剂易分解,(2)温度偏低、时间较短聚乙烯原料不熔,塑化不好。
优选的母片挤出成型工艺包括:
挤出成型确定了片材的宽度和厚度,根据发泡倍数就能控制泡棉的厚度和宽度,是非常重要的环节,优选的挤出成型参数为,挤出机机筒一区到七区温度分别为115~125℃,115~125℃,116~126℃,118~128℃,120~130℃,120~130℃,120~130℃,连接体为98~105℃,模具温度均为120~130℃,螺杆转速18~20r/min。
温度和螺杆转速等工艺参数影响挤出片材的各方面的性能,不再所述范围内会产生如下影响:(1)挤出温度高,螺杆转速慢,发泡剂提前分解,片材有针孔(2)挤出温度低,螺杆转速快,聚乙烯不熔,塑化不好,不能挤出成型,无法量产。
优选的辐照工艺包括:
辐射交联是专指利用各种辐射引发聚合物高分子长链之间的交联反应的技术手段,采用电子加速器产生高速电子,高速电子穿透PE片材变成IXPE片材,是其分子链结构由线性变为网状结构,提高聚乙烯PE片材的强度,才能通过发泡炉发泡成型。
炭黑分散在聚乙烯中,会提高聚乙烯对辐照的敏感度,在交联度一致下,会大大降低辐照剂量,所以优选的辐照工艺参数为辐照剂量为60~90KGy。
不再所述范围内会产生如下影响:(1)较高的剂量会导致片材交联度偏大,溶体强度大,发泡气体呈大气泡形式存在泡棉里,导致泡棉韧性差、泡孔大和表皮差;(2)较低的剂量,使片材交联度低,一方面导致泡棉较粘,不利于正常发泡,另一方面,溶体强度低,发泡气体逃逸,泡棉倍率偏低,拉伸强度低。
优选的发泡工艺包括:
发泡是泡棉生产过程中最终环节,其发泡参数直接影响到泡棉最终的物理性能;确定不同倍率、不同母片厚度的发泡炉参数关系,以及通过发泡试验各种规格的产品进行发泡,确定不同电阻值泡棉配方中所需导电炭黑的含量。
优选的发泡工艺参数为(垂直炉)水平段140~160℃,垂直1/2区为230~250℃/230~250℃,垂直3/4区为190~220℃/190~220℃,垂直5/6区为150~160℃/150~160℃,网带速度2~4m/min。
发泡温度和网带速度等工艺参数直接影响泡棉的物性参数,不再所述范围内会产生如下影响:(1)网带速度慢,发泡温度偏高,容易导致片材提前发泡,粘在网带上,泡棉在高温下发泡时间长,泡棉表皮差,泡孔大,容易老化;(2)网带速度快,发泡温度低,导致发泡剂不能完全分解,泡棉倍率低,成本高。
优选的淋膜复合工艺包括:
防静电泡棉上表面要淋一层导电膜,在淋膜挤出机进料口倒入配好的混合母粒,使其高温下溶在一起,在螺杆的推动下,通过垂直模具挤出导电薄膜,与水平防静电泡棉贴合,迅速经过平辊冷却,使导电膜淋到防静电泡棉上,确定了挤出速度和挤出温度和覆膜速度对淋膜厚度和宽度的影响。
淋膜工艺:挤出速度1~3m/min,螺杆一区到七区温度分别为250~270℃,模具七个区温度均为220~240℃;覆膜速度3~5m/min。
不在所述范围内会产生如下影响:(1)挤出温度过低,PE导电膜不能完全熔融,与防静电泡棉淋膜时会提前冷却,导致导电膜与泡棉不能完全贴合好,(2)挤出温度高,导电膜温度太高,会烫坏防静电泡棉,影响复合膜性能(3)覆膜速度过快(过慢)会导致导电膜的太薄(厚),均影响其复合材料性能。
优选的背胶贴合工艺包括:
两层防静电材料(防静电泡棉下表面)要与防静电基材背胶贴合,有两种背胶路径:(1)在离型纸上涂胶,然后与泡棉背胶,最后撕开离型纸与防静电片材贴合,(2)直接在防静电片材(代替离型纸)上涂胶,然后与泡棉背胶贴合。均确定了背胶的厚度、背胶速度和背胶温度对胶粘性、气味等物性参数的影响。
背胶工艺:涂胶克重60~100g/m2,背胶速度8~12m/min,背胶温度60~80℃。
不在所述范围内会产生如下影响:(1)涂胶量偏多,背胶速度慢导致成本增加(2)涂料量过少,会导致粘性不够,无法与基材贴合(3)背胶速度过快,会导致涂胶不均匀,局部防静电泡棉背不上胶。
本发明的另一目的在于提供多层复合防静电材料,通过前述的制备方法制备得到。
本发明相对于现有技术的有益效果包括:
1、中间层是防静电泡棉,密度低(50~100kg/m3),所以复合材料抗震缓冲性能好;
2、防静电泡棉是闭孔发泡材料,所以复合材料隔热、隔音性能好。
3、复合材料表层导电膜具有优异的止滑性能,表皮质感好,使用寿命长。
4、防静电泡棉和导电膜主要成分是聚乙烯,熔点低,所以复合材料成型效率高,尺寸稳定性能好;
5、泡棉和膜都是导电/防静电材料;所制多层复合材料是永久防静电材料。
附图说明
图1是多层复合材料-卷材;
图2是多层复合防静电材料的剖面图,从上至下依次是导电膜、防静电泡棉、防静电基材;
图3是多层复合材料应用图。
具体实施方式
下面将结合本发明实施例和附图,对发明实施例中的技术方案进行清楚、详细的说明,但本发明不局限于此。
实施例1
防静电泡棉组成,按质量百分比,包括71%的LDPE、5%的EVA、8%的导电炭黑、10%的AC发泡剂、1.0%的ZnO、2.0%的ZnSt、3%的抗氧剂1010与DSTP。1010与DSTP的质量比为0.5,LDPE的熔融指数为2.0g/10min。
导电膜组成,按质量百分比,包括30%的LDPE、35.5%的LLDPE、30%的MLLDPE、4%的导电炭黑和0.5%的PPA助剂。LDPE的熔融指数为1.5g/10min,LLDPE的熔融指数为7.0g/10min,MLLDPE的熔融指数为10.0g/10min。
胶的种类为油性溶剂亚克力不干胶;防静电基材种类为PVC。
制备方法包括以下几个步骤:
步骤A:在140℃下,共混12min,加入不同比例的发泡剂,助发泡剂、低密度聚乙烯,EVA和导电炭黑密炼造粒;然后母粒挤出,挤出机机筒一区到七区温度分别为125℃,125℃,126℃,128℃,130℃,130℃,130℃,连接体为105℃,模具温度均为130℃,螺杆转速18.5r/min,得到防静电PE片材。
步骤B:采用电子加速器产生高速电子,辐照剂量为90KGy;高度电子穿透防静电PE片材变成防静电IXPE片材;将防静电IXPE片材在垂直发泡炉发泡,水平预热段140℃,垂直1/2区为230℃/230℃,垂直3/4区为220℃/220℃,垂直5/6区为150℃/150℃,网带速度2.5m/min,得到防静电泡棉。
步骤C:将防静电泡棉在淋膜机上淋膜,淋膜挤出速度2m/min,螺杆一区到七区温度分别为250℃,250℃,250℃,250℃,230℃,210℃,200℃,模具七个区温度均为220℃;平辊覆膜速度4m/min,得到导电膜-防静电泡棉两层复合材料。
步骤D:将两层复合材料在涂胶机上与防静电基材背胶贴合,涂胶克重100g/m2,背胶速度10m/min,背胶温度80℃,得到多层复合防静电材料。
所得多层复合防静电材料-卷材如图1所示;所得多层复合防静电材料的剖面图如图2所示,从上至下依次是导电膜、防静电泡棉、防静电基材;所得多层复合材料应用图如图3所示。
项目 标准 实施例1
体积电阻 ANSI/ESD STM11.12-2000 1.8*105Ω
实施例2
防静电泡棉组成,按质量百分比,包括64%的LDPE、10%的EVA、8%的导电炭黑、12%的AC发泡剂、1.0%的ZnO、2.0%的ZnSt、3%的抗氧剂1010与DSTP。1010与DSTP的质量比为0.5,LDPE的熔融指数为2.0g/10min。
导电膜组成,按质量百分比,包括30%的LDPE、33%的LLDPE、30%的MLLDPE、6%的导电炭黑和1.0%的PPA助剂。LDPE的熔融指数为1.5g/10min,LLDPE的熔融指数为6.0g/10min,MLLDPE的熔融指数为12.0g/10min。
胶的种类为油性溶剂亚克力不干胶;防静电基材种类为PMMA。
制备方法包括以下几个步骤:
步骤A:在130℃下,共混12min,加入不同比例的发泡剂,助发泡剂、低密度聚乙烯,EVA和导电炭黑密炼造粒;然后母粒挤出,挤出机机筒一区到七区温度分别为120℃,120℃,121℃,123℃,125℃,125℃,125℃,连接体为105℃,模具温度均为125℃,螺杆转速19r/min,得到防静电PE片材。
步骤B:采用电子加速器产生高速电子,辐照剂量为85KGy;高度电子穿透防静电PE片材变成防静电IXPE片材;将防静电IXPE片材在垂直发泡炉发泡,水平预热段145℃,垂直1/2区为240℃/240℃,垂直3/4区为220℃/220℃,垂直5/6区为155℃/155℃,网带速度2.7m/min,得到防静电泡棉。
步骤C:将防静电泡棉在淋膜机上淋膜,淋膜挤出速度2m/min,螺杆一区到七区温度分别为260℃,260℃,260℃,260℃,240℃,220℃,210℃,模具七个区温度均为230℃;平辊覆膜速度5m/min,得到导电膜-防静电泡棉两层复合材料。
步骤D:将两层复合材料在涂胶机上与防静电基材背胶贴合,涂胶克重90g/m2,背胶速度10m/min,背胶温度75℃,得到多层复合防静电材料。
所得多层复合防静电材料-卷材如图1所示;所得多层复合防静电材料的剖面图如图2所示,从上至下依次是导电膜、防静电泡棉、防静电基材;所得多层复合材料应用图如图3所示。
项目 标准 实施例2
体积电阻 ANSI/ESD STM11.12-2000 2.3*104Ω
实施例3
防静电泡棉组成,按质量百分比,包括69.5%的LDPE、8%的EVA、7%的导电炭黑、12%的AC发泡剂、0.5%的ZnO、1.0%的ZnSt、2%的抗氧剂1010与DSTP。1010与DSTP的质量比为0.5,LDPE的熔融指数为2.0g/10min。
导电膜组成,按质量百分比,包括35%的LDPE、34%的LLDPE、25%的MLLDPE、5%的导电炭黑和1.0%的PPA助剂。LDPE的熔融指数为2.0g/10min,LLDPE的熔融指数为7.0g/10min,MLLDPE的熔融指数为7.0g/10min。
胶的种类为水性溶剂亚克力不干胶;防静电基材种类为EVA。
制备方法包括以下几个步骤:
步骤A:在120℃下,共混10min,加入不同比例的发泡剂,助发泡剂、低密度聚乙烯,EVA和导电炭黑密炼造粒;然后母粒挤出,挤出机机筒一区到七区温度分别为115℃,115℃,116℃,118℃,120℃,120℃,120℃,连接体为105℃,模具温度均为120℃,螺杆转速18r/min,得到防静电PE片材。
步骤B:采用电子加速器产生高速电子,辐照剂量为80KGy;高度电子穿透防静电PE片材变成防静电IXPE片材;将防静电IXPE片材在垂直发泡炉发泡,水平预热段140℃,垂直1/2区为245℃/245℃,垂直3/4区为210℃/210℃,垂直5/6区为150℃/150℃,网带速度3.0m/min,得到防静电泡棉。
步骤C:将防静电泡棉在淋膜机上淋膜,淋膜挤出速度2m/min,螺杆一区到七区温度分别为255℃,255℃,255℃,255℃,240℃,230℃,210℃,模具七个区温度均为230℃;平辊覆膜速度5m/min,得到导电膜-防静电泡棉两层复合材料。
步骤D:将两层复合材料在涂胶机上与防静电基材背胶贴合,涂胶克重90g/m2,背胶速度12m/min,背胶温度80℃,得到多层复合防静电材料。
所得多层复合防静电材料-卷材如图1所示;所得多层复合防静电材料的剖面图如图2所示,从上至下依次是导电膜、防静电泡棉、防静电基材;所得多层复合材料应用图如图3所示。
项目 标准 实施例3
体积电阻 ANSI/ESD STM11.12-2000 3.6*107Ω
实施例4
防静电泡棉组成,按质量百分比,包括64.5%的LDPE、15%的EVA、6%的导电炭黑、10%的AC发泡剂、0.5%的ZnO、1.0%的ZnSt、3%的抗氧剂1010与DSTP。1010与DSTP的质量比为0.5,LDPE的熔融指数为2.0g/10min。
导电膜组成,按质量百分比,包括40%的LDPE、35%的LLDPE、20%的MLLDPE、3%的导电炭黑和2.0%的PPA助剂。LDPE的熔融指数为2.0g/10min,LLDPE的熔融指数为8.0g/10min,MLLDPE的熔融指数为15.0g/10min。
胶的种类为热熔性溶剂亚克力不干胶;防静电基材种类为PU。
制备方法包括以下几个步骤:
步骤A:在140℃下,共混8min,加入不同比例的发泡剂,助发泡剂、低密度聚乙烯,EVA和导电炭黑密炼造粒;然后母粒挤出,挤出机机筒一区到七区温度分别为116℃,116℃,118℃,120℃,123℃,123℃,123℃,连接体为100℃,模具温度均为123℃,螺杆转速19r/min,得到防静电PE片材。
步骤B:采用电子加速器产生高速电子,辐照剂量为80KGy;高度电子穿透防静电PE片材变成防静电IXPE片材;将防静电IXPE片材在垂直发泡炉发泡,水平预热段145℃,垂直1/2区为240℃/240℃,垂直3/4区为200℃/200℃,垂直5/6区为160℃/160℃,网带速度2.5m/min,得到防静电泡棉。
步骤C:将防静电泡棉在淋膜机上淋膜,淋膜挤出速度3m/min,螺杆一区到七区温度分别为250℃,250℃,250℃,250℃,235℃,220℃,205℃,模具七个区温度均为220℃;平辊覆膜速度4.5m/min,得到导电膜-防静电泡棉两层复合材料。
步骤D:将两层复合材料在涂胶机上与防静电基材背胶贴合,涂胶克重80g/m2,背胶速度12m/min,背胶温度75℃,得到多层复合防静电材料。
所得多层复合防静电材料-卷材如图1所示;所得多层复合防静电材料的剖面图如图2所示,从上至下依次是导电膜、防静电泡棉、防静电基材;所得多层复合材料应用图如图3所示。
项目 标准 实施例4
体积电阻 ANSI/ESD STM11.12-2000 5.4*109Ω
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明,不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干简单推演或替换,都应当视为属于本发明的保护范围。

Claims (10)

1.一种多层复合防静电材料的制备方法,其特征在于,包括:
(1)将聚乙烯主料、聚烯烃改性剂、炭黑、发泡剂和辅料混合造粒、然后母粒用单螺杆挤出成片材、其片材经过电子加速器辐射,最后经过发泡炉发泡成聚乙烯防静电泡棉;
(2)将聚乙烯防静电泡棉用淋膜挤出机在防静电泡棉一侧淋一层导电膜;
(3)防静电泡棉的另一侧与防静电基材背胶贴合。
2.根据权利要求1所述的一种多层复合防静电材料的制备方法,其特征在于,聚乙烯防静电泡棉组成为:添加质量比例56-83.3%的LDPE、5-15%的EVA、6~8%的导电炭黑、5-15%的AC发泡剂、0.5-1.0%的ZnO、1.0-2.0%的ZnSt、0.2-3%的抗氧剂1010与DSTP,各材料质量百分比之和为100%。
3.根据权利要求1所述的一种多层复合防静电材料的制备方法,其特征在于,导电膜组成为:添加质量比例30~40%的LDPE、22~47.5%的LLDPE、20~30%的MLLDPE、2~6%的导电炭黑和0.5~2%的PPA助剂,各材料质量百分比之和为100%。
4.根据权利要求1所述的一种多层复合防静电材料的制备方法,其特征在于,胶的种类为油性溶剂不干胶、水性溶剂不干胶、热熔性溶剂不干胶中一种或者多种;防静电基材种类为PET、ABS、PP、PS、PVC、PMMA、EVA、PU、EPE、IXPE、XPE片材中一种或者多种。
5.根据权利要求1所述的一种多层复合防静电材料的制备方法,其特征在于,生产流程包括:
6.根据权利要求5所述的一种多层复合防静电材料的制备方法,其特征在于,造粒、挤出工艺包括:在120~140℃下,共混8~12min,加入不同比例的发泡剂,助发泡剂、低密度聚乙烯,EVA和导电炭黑密炼造粒;然后母粒挤出,挤出机机筒一区到七区温度分别为115~125℃,115~125℃,116~126℃,118~128℃,120~130℃,120~130℃,120~130℃,连接体为98~105℃,模具温度均为120~130℃,螺杆转速18~20r/min。
7.根据权利要求5所述的一种多层复合防静电材料的制备方法,其特征在于,辐照、发泡工艺包括:采用电子加速器产生高速电子,辐照剂量为60~90KGy;发泡工艺水平预热段140~160℃,垂直1/2区为230~250℃/230~250℃,垂直3/4区为190~220℃/190~220℃,垂直5/6区为150~160℃/150~160℃,网带速度2~4m/min。
8.根据权利要求5所述的一种多层复合防静电材料的制备方法,其特征在于,淋膜工艺:挤出速度1~3m/min,螺杆一区到七区温度分别为250~270℃,250~270℃,250~270℃,250~270℃,230~250℃,210~230℃,200~210℃,模具七个区温度均为220~240℃;覆膜速度3~5m/min。
9.根据权利要求5所述的一种多层复合防静电材料的制备方法,其特征在于,背胶贴合工艺:涂胶克重60~100g/m2,背胶速度8~12m/min,背胶温度60~80℃。
10.一种多层复合防静电材料,其特征在于,根据权利要求1-9任一项所述的一种多层复合防静电材料的制备方法制备得到。
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