CN112143088A - 一种永久抗静电pe透气膜复合材料及其制备方法 - Google Patents
一种永久抗静电pe透气膜复合材料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种永久抗静电PE透气膜复合材料及其制备方法,属于高分子复合材料技术领域,复合材料包括LLDPE:20‑40份;LDPE:5‑10份;PP:3‑5份;EBA‑MAH:2‑4份;碳酸钙:40‑60份;硬脂酸基季胺纳:0.3‑1份;钠基层状蒙脱土:3‑5份;抗氧剂:0.05‑0.1份;润滑剂:0.01‑0.05份;本发明引入了硬脂酸基季胺钠通过与钠基层状蒙脱土预插层使其包覆在蒙脱土层状结构内,与活化碳酸钙均匀分散在聚合物基体中,硬脂酸基季胺钠中的阳离子缓慢释放在膜的表面形成离子层起到永久抗静电效果,解决现有技术中PE透气膜材料抗静电存在抗静电效果较差易失效的问题。
Description
技术领域
本发明涉及高分子复合材料技术领域,更具体地说,涉及一种永久抗静电PE透气膜复合材料及其制备方法。
背景技术
目前PE透气膜因其出色的透气性和液体(水、血液、体液)阻隔性广泛应用在医用防护服、婴儿纸尿裤、成人纸尿裤、卫生巾、暖宝宝和包装领域。PE透气膜透气(透湿)不透水的特性因为PE经过活化碳酸钙填充改性后均匀分散在PE基体中,经过流延、吹塑成型拉伸一定的倍率后形成细微孔洞,而孔洞的直径远小于水的直径20微米,远大于水汽的直径0.0004微米,所以起到透气防水效果,如图1。透气膜在加工成成品的过程中因膜的厚度小(3-30微米),比表面积大,在摩擦中极易产生静电,使膜黏连在一起不易加工,同时静电吸附很容易造成成品表面堆积灰尘和病菌,PE透气膜的抗静电要求越来越受到重视。
PE透气膜的抗静电处理目前有2种方法:其一是在透气膜表面涂覆、喷洒或浸渍表面活性剂水溶液,这个方法工序复杂,抗静电效果较差,极易失效。另一种方法是在PE透气膜改性料中加入烷基磺酸盐、烷基硝酸盐等阴离子抗静电母粒,这种方法抗静电母粒添加量大,抗静电时效差,极易在膜的表面析出大大影响膜的印刷性能和热封性能,机械强度也有加大降低。
本发明为了解决目前PE透气膜材料抗静电存在的问题,开发出永久抗静电复合材料。引入了硬脂酸基季胺钠通过与钠基层状蒙脱土预插层使其包覆在蒙脱土层状结构内,与活化碳酸钙均匀分散在聚合物基体中,硬脂酸基季胺钠中的阳离子缓慢释放在膜的表面形成离子层起到永久抗静电效果。
发明内容
针对现有技术的不足,本发明的目的在于提供一种永久抗静电PE透气膜复合材料及其制备方法,解决现有技术中PE透气膜材料抗静电存在抗静电效果较差易失效的问题。
本发明的目的可以通过以下技术方案实现:
一种永久抗静电PE透气膜复合材料,其组成原料的重量份为:
作为本发明的一种优选方案,所述LLDPE为茂金属催化熔指在1-4g/10min范围。
作为本发明的一种优选方案,所述LDPE为熔指在3-6g/10min范围。
作为本发明的一种优选方案,所述PP为熔指在2-4g/10min的共聚PP。
作为本发明的一种优选方案,所述的EBA-MAH酯基含量15-20%、熔指2-7g/10min、马来酸酐MAH含量0.5-1%。
作为本发明的一种优选方案,所述的碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。
作为本发明的一种优选方案,所述的层状蒙脱土为钠基层状蒙脱土。
作为本发明的一种优选方案,所述的润滑剂为OPE蜡、硬脂酸盐2:1复配。
一种永久抗静电PE透气膜复合材料的制备方法,其特征在于,包括以下步骤:
S1:硬脂酸基季胺钠与钠基蒙脱土插层预处理:将硬脂酸基季胺钠与蒙脱土胺重量称好加入高速混合机在100度高速混合30min。
S2:按配方中重量份数比例将LLDPE、LDPE、PP、EBA-MAH、步骤1预混料、润滑剂和抗氧剂在高速混合机中混合均匀混合5-8分钟,将混合料在长径比为56:1的双螺杆挤出机中主喂加料,活化碳酸钙分两段侧喂加入,进行熔融、混合、分散,在160-190℃温度下进行挤出造粒,螺杆转速控制在450-500r/min。
本发明的有益效果:
1)本发明引入了硬脂酸基季胺钠通过与钠基层状蒙脱土预插层使其包覆在蒙脱土层状结构内,与活化碳酸钙均匀分散在聚合物基体中,硬脂酸基季胺钠中的阳离子缓慢释放在膜的表面形成离子层起到永久抗静电效果。
2)本发明硬脂酸基季胺钠与钠基蒙脱土插层处理,大大提高了硬脂酸基季胺钠的热稳定效果,使其加工温度由230度提高到260度,解决了PE透气膜流延时不耐温的缺点。
3)本发明引入LDPE和EBA-MAH不但提高PE透气膜的柔软度和加工性能,LDPE和EBA-MAH大量的侧链段增加了LLDPE分子链之间的间隙,更有利于硬脂酸基季胺钠/蒙脱土插层结构像表面的迁移,提高抗静电效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为PE透气膜透气示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
本发明中LLDPE为线性低密度聚乙烯,LDPE为低密度聚乙烯,PP为聚丙烯,EBA-MAH为马来酸酐接枝乙烯-丙烯酸丁酯。
实施例1:
一种永久抗静电PE透气膜复合材料,其特征在于,其组成原料的重量份为:
LLDPE为茂金属催化熔指在1-4g/10min范围。LDPE为熔指在3-6g/10min范围。PP为熔指在2-4g/10min的共聚PP。EBA-MAH酯基含量15-20%、熔指2-7g/10min、马来酸酐MAH含量0.5-1%。碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。层状蒙脱土为钠基层状蒙脱土。润滑剂为OPE蜡、硬脂酸盐2:1复配。
一种永久抗静电PE透气膜复合材料的制备方法,包括以下步骤:
S1:硬脂酸基季胺钠与钠基蒙脱土插层预处理:将硬脂酸基季胺钠与蒙脱土胺重量称好加入高速混合机在100度高速混合30min。
S2:按配方中重量份数比例将LLDPE、LDPE、PP、EBA-MAH、步骤1预混料、润滑剂和抗氧剂在高速混合机中混合均匀混合5-8分钟,将混合料在长径比为56:1的双螺杆挤出机中主喂加料,活化碳酸钙分两段侧喂加入,进行熔融、混合、分散,在160-190℃温度下进行挤出造粒,螺杆转速控制在450-500r/min。
实施例2:
一种永久抗静电PE透气膜复合材料,其特征在于,其组成原料的重量份为:
LLDPE为茂金属催化熔指在1-4g/10min范围。LDPE为熔指在3-6g/10min范围。PP为熔指在2-4g/10min的共聚PP。EBA-MAH酯基含量15-20%、熔指2-7g/10min、马来酸酐MAH含量0.5-1%。碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。层状蒙脱土为钠基层状蒙脱土。润滑剂为OPE蜡、硬脂酸盐2:1复配。
一种永久抗静电PE透气膜复合材料的制备方法同实施例1。
实施例3:
一种永久抗静电PE透气膜复合材料,其特征在于,其组成原料的重量份为:
LLDPE为茂金属催化熔指在1-4g/10min范围。LDPE为熔指在3-6g/10min范围。PP为熔指在2-4g/10min的共聚PP。EBA-MAH酯基含量15-20%、熔指2-7g/10min、马来酸酐MAH含量0.5-1%。碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。层状蒙脱土为钠基层状蒙脱土。润滑剂为OPE蜡、硬脂酸盐2:1复配。
一种永久抗静电PE透气膜复合材料的制备方法同实施例1。
实施例4:
一种永久抗静电PE透气膜复合材料,其特征在于,其组成原料的重量份为:
LLDPE为茂金属催化熔指在1-4g/10min范围。LDPE为熔指在3-6g/10min范围。PP为熔指在2-4g/10min的共聚PP。EBA-MAH酯基含量15-20%、熔指2-7g/10min、马来酸酐MAH含量0.5-1%。碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。层状蒙脱土为钠基层状蒙脱土。润滑剂为OPE蜡、硬脂酸盐2:1复配。
一种永久抗静电PE透气膜复合材料的制备方法同实施例1。
对比例:
一种永久抗静电PE透气膜复合材料,其特征在于,其组成原料的重量份为:
LLDPE为茂金属催化熔指在1-4g/10min范围。LDPE为熔指在3-6g/10min范围。PP为熔指在2-4g/10min的共聚PP。碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。润滑剂为OPE蜡、硬脂酸盐2:1复配。
一种永久抗静电PE透气膜复合材料的制备方法同实施例1。
实施例和对比例的测试结果:
力学性能测试:
将上述实施例1-4和对比例制得的样品按照统一工艺注塑成标准样条后进行主要力学强度测试,其中拉伸强度的测试标准是GB/T1040-2006,单位MPa;表面电阻率测试标准是GB/T 1410-2006,单位Ω;
其具指标如下表所示:
表1:实施例和对比例实验数据
拉伸轻度测试按照GB/T1040-2006标准、1A型哑铃状标样,采用万能电子实验机在25℃、50%湿度环境下按照GB/T1040.1-2006第9章实验方法进行测试。
表面电阻率测试样品在25℃、50%湿度环境下放置一周后测试。
从实施例1-4和对比例实验数据可以看出,永久抗静电PE透气膜复合材料不但具有较好的拉伸强度,同时具有较低的表面电阻率,6个月之后材料表面电阻率变化较小,仍有很高的抗静电效果。
PE透气膜透气,如图1所示。
本发明引入硬脂酸基季胺钠和钠基层状蒙脱土,通过预处理使硬脂酸基季胺钠插层到钠基蒙脱土片层中,处理后的蒙脱土与碳酸钙均匀分散到聚合物基体中,硬脂酸基季胺钠中的阳离子在材料表面形成导电离子层,在蒙脱土的片层结构中大大提高了抗磨损能力,形成永久抗静电PE透气膜材料。同时硬脂酸基季胺钠与碳酸钙包覆助剂硬脂酸有很好的相容性,使预处理的蒙脱土很好的分散在碳酸钙中。引入适量LDPE和EBA-MAH不但提高了复合材料的加工性能,同时由于LDPE和EBA-MAH大量的侧链结构降低了LLDPE分子链之间的作用力,增加了分子链之间的间隙,有利于硬脂酸基季胺钠与蒙脱土插层结构迁移到PE透气膜表面,发挥抗静电效果。硬脂酸季胺钠一般在高温加工(230度以上)时容易分解,当其与钠基蒙脱土插层处理后加工温度可提高到260度,大大提高了PE透气膜流延加工的热稳定性。
本发明引入了硬脂酸基季胺钠通过与钠基层状蒙脱土预插层使其包覆在蒙脱土层状结构内,与活化碳酸钙均匀分散在聚合物基体中,硬脂酸基季胺钠中的阳离子缓慢释放在膜的表面形成离子层起到永久抗静电效果。本发明硬脂酸基季胺钠与钠基蒙脱土插层处理,大大提高了硬脂酸基季胺钠的热稳定效果,使其加工温度由230度提高到260度,解决了PE透气膜流延时不耐温的缺点。本发明引入LDPE和EBA-MAH不但提高PE透气膜的柔软度和加工性能,LDPE和EBA-MAH大量的侧链段增加了LLDPE分子链之间的间隙,更有利于硬脂酸基季胺钠/蒙脱土插层结构像表面的迁移,提高抗静电效果。
在本说明书的描述中,参考术语“一个实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。
Claims (9)
2.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述LLDPE为茂金属催化熔指在1-4g/10min范围。
3.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述LDPE为熔指在3-6g/10min范围。
4.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述PP为熔指在2-4g/10min的共聚PP。
5.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述的EBA-MAH酯基含量15-20%、熔指2-7g/10min、马来酸酐MAH含量0.5-1%。
6.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述的碳酸钙为经硬脂酸活化的活性碳酸钙,粒径D50在2.5-3.0微米。
7.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述的层状蒙脱土为钠基层状蒙脱土。
8.根据权利要求1所述的一种永久抗静电PE透气膜复合材料,其特征在于:所述的润滑剂为OPE蜡、硬脂酸盐2:1复配。
9.一种如权利要求1所述永久抗静电PE透气膜复合材料的制备方法,其特征在于,包括以下步骤:
S1:硬脂酸基季胺钠与钠基蒙脱土插层预处理:将硬脂酸基季胺钠与蒙脱土胺重量称好加入高速混合机在100度高速混合30min。
S2:按配方中重量份数比例将LLDPE、LDPE、PP、EBA-MAH、步骤1预混料、润滑剂和抗氧剂在高速混合机中混合均匀混合5-8分钟,将混合料在长径比为56:1的双螺杆挤出机中主喂加料,活化碳酸钙分两段侧喂加入,进行熔融、混合、分散,在160-190℃温度下进行挤出造粒,螺杆转速控制在450-500r/min。
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