CN111925588A - 一种驻极体高熔指聚丙烯母粒及其制备方法 - Google Patents
一种驻极体高熔指聚丙烯母粒及其制备方法 Download PDFInfo
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Abstract
本申请提供一种驻极体高熔指聚丙烯母粒及其制备方法,其中驻极体高熔指聚丙烯母粒,重量百分比组成为:聚丙烯粉料95%~99%;二叔丁基过氧化物0.3%~2%;成核剂0.1%~0.3%;抗氧剂:0.2%~1%;润滑剂0.1%~0.5%;电介质0.2%~1%;方法包括:将原料进行混合;将混合后的物料喂入挤出机;在挤出机中对物料进行真空脱挥处理;冷却成型,切粒;过筛转运;烘干。在本申请中,能够解决单一聚丙烯颗粒材料难分散、易堵喷嘴、不稳定易漂移的问题;增加熔喷布静电吸附和负离子杀菌的能力,有效阻隔微米以下的飞沫、粉尘、病毒等。
Description
技术领域
本申请涉及高分子材料技术领域,尤其涉及一种驻极体高熔指聚丙烯母粒 及其制备方法。
背景技术
研究显示,空气中由污染造成的颗粒物尤其是空气动力学当量小于等于2.5 微米的颗粒物粒径小,且富含有毒有害物质。这些颗粒物在空气中能长时间停 留,极易被人吸收进入身体从而引起引发呼吸系统疾病、伤肺、致癌、心血管 疾病、生殖系统、胎儿发育等疾病。因此,在空气净化领域,人们越来越重视 开发可以吸附这些颗粒物的材料。目前,极化后可以吸附这些颗粒物的高分子 材料成为研究热点。通过驻极处理的熔喷聚丙烯纤维滤料由于表面带有电荷, 具有吸附空气中污染颗粒的作用。熔喷聚丙烯纤维滤料已大量应用于空气净化 及医疗卫生行业,如用作空调滤网、医用防护口罩和防尘口罩等。但现有技术 直接对熔喷聚丙烯纤维进行驻极处理,需要较高的驻极电压(高达30kV),且存 在驻极处理后的聚丙烯纤维过滤效率低、阻力大,现有工艺制备的相关技术中, 为了混合均匀,大量使用了多种助剂和添加剂,多种助剂和添加剂会最终残留 在聚丙烯母粒中,不仅损害熔喷布的品质,并发生严重的喷头堵塞问题,影响 生产。
发明内容
本申请的目的在于克服现有技术中的缺点,提供一种驻极体高熔指聚丙烯 母粒及其制备方法,能够解决单一聚丙烯颗粒材料难分散、易堵喷嘴、不稳定 易漂移的问题;增加熔喷布静电吸附和负离子杀菌的能力,有效阻隔微米以下 的飞沫、粉尘、病毒等。
本申请提供一方面提供一种驻极体高熔指聚丙烯母粒,重量百分比组成为:
聚丙烯粉料95%~99%;
二叔丁基过氧化物0.3%~2%;
成核剂0.1%~0.3%;
抗氧剂:0.2%~1%;
润滑剂0.1%~0.5%;
电介质0.2%~1%。
进一步的,所述聚丙烯粉料为均聚聚丙烯(PPH)、无规共聚聚丙烯(PPR)中 的任意一种或两种的混合物。
进一步的,所述抗氧剂为1010抗氧剂、168抗氧剂中的任意一种或两种的 混合物。
进一步的,所述电介质化学通式为NaR3AI6Si6O18BO33(OH,F)4,晶体属 三方晶系的环状结构硅酸盐矿物的总称,式中R代表金属阳离子,当R为Fe2+ 时,构成黑色晶体电介质。
进一步的,当所述抗氧化剂为1010抗氧剂和168抗氧剂两种的混合物时, 1010抗氧剂的重量百分比为0.1%~0.5%,168抗氧剂的重量百分比为0.1%~0.5%。
本申请另一方明提供一种驻极体高熔指聚丙烯母粒制备方法,步骤包括:
将原料进行混合;
将混合后的物料喂入挤出机;
在挤出机中对物料进行真空脱挥处理;
冷却成型,切粒;
过筛转运;
烘干。
进一步的,所述将原料进行混合具体为:将聚丙烯粉料和二叔丁基过氧化 物在低速搅拌机中混合均匀;投入成核剂、抗氧剂、润滑剂和电介质在低速搅 拌机中混合均匀分散。
进一步的,所述冷却成型,切粒具体为:物料熔体经温度为10℃~20℃的 8米长的冷却水槽冷却,在切粒机牵引下固化成条状在冷却水槽中冷却成型,经 两个除水装置鼓风吹干后进龙门切粒机切粒,形成物料粒子。
进一步的,所述烘干具体为:物料粒子经温度设置为70℃~80℃的循环烘 料仓,烘料4小时均化后,物料粒子表面层所含水分及低沸点小分子有机物均 会被热气流带出,达到干燥和降低气味的目的。
进一步的,所述真空脱挥处理中真空度为-0.12~-0.08MPa。
在本申请实施例中,由于采用上述技术方案,以低流动性聚丙烯为基材, 使用高性能复配型电介质,加入成核剂、抗氧剂、润滑剂等进行均匀混合生产, 解决了单一聚丙烯颗粒材料难分散、易堵喷嘴、不稳定易漂移的问题。电介质 永久性的释放电荷、空气负离子,增加熔喷布静电吸附和负离子杀菌的能力, 有效阻隔微米以下的飞沫、粉尘、病毒等。能长期有效释放负离子和储存电荷, 达到提高熔喷无纺布的综合过滤效果和抗热衰减的性能。由于其优异的高性能 熔体流动指数使其在同样纤维细度和克重的情况下,降低熔喷无纺布产品阻力, 提高熔喷无纺布产品过滤效果,触摸尤如婴儿肌肤般柔软细腻光滑;同时有效 防止熔喷无纺布变脆、变形、收缩、黄变等故障现象。物料均匀分散,有效避 免了材料团聚而发生的喷头堵塞问题,不会堵塞喷丝嘴,适用于熔喷工艺,制 作熔喷布。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚,下面将结合本申请具体实 施例对本申请技术方案进行清楚、完整地描述。显然,所描述的实施例仅是本 申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普 通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本 申请保护的范围。
以下详细说明本申请各实施例提供的技术方案。
本实施例提供一种驻极体高熔指聚丙烯母粒,其重量百分比组成为:
聚丙烯粉料95%~99%;聚丙烯粉料为均聚聚丙烯(PPH)、无规共聚聚丙烯 (PPR)中的任意一种或两种的混合物。
二叔丁基过氧化物0.3%~2%;
成核剂0.1%~0.3%;
抗氧剂:0.2%~1%;
抗氧剂为1010抗氧剂、168抗氧剂中的任意一种或两种的混合物,当抗氧 化剂为1010抗氧剂和168抗氧剂两种的混合物时,1010抗氧剂的重量百分比为 0.1%~0.5%和168抗氧剂的重量百分比为0.1%~0.5%。
润滑剂0.1%~0.5%;
电介质0.2%~1%。
电介质化学通式为NaR3AI6Si6O18BO33(OH,F)4,晶体属三方晶系的环状 结构硅酸盐矿物的总称。式中R代表金属阳离子,当R为Fe2+时,构成黑色晶 体电介质。电介质晶体呈近三角形的柱状,两端晶形不同,柱面具纵纹,常呈 柱状、针状、放射状和块状集合体。玻璃光泽,断口松脂光泽,半透明至透明, 无机理,摩氏硬度7~7.5,比重2.98~3.20,有压电性和热电性。
电介质是在熔喷法无纺布驻极工艺中,采用载体聚丙烯、纳米远红外电介 质粉沫加入适量的SiO2(二氧化硅)、Ai2O3(三氧化二铝)、Fe2O3(氧化铁)等 和其它引发剂、成核剂、抗氧剂等无机材料加热熔化制成的高溶脂颗粒通过熔 喷法制成熔喷无纺布,然后在卷布前通过静电发生器针状电极电压50-120KV, 一组或多组电晕放电的方式对熔喷材料带上电荷,施加高压时针尖下方的空气 产生电晕电离,产生局部击穿放电,载流子通过电场的作用,而沉积到熔喷布 表面,一部分载流子会深入表层被电介质的陷阱捕获,从而使熔喷无纺布成为 驻极体过滤材料。达到提高纤维过滤效率的材料,并且由于远红外纳米电介质 具有持续释放负离子的作用,所以是兼具长期储存电荷功能的抗菌性电解质材 料。
本申请另一实施例提供一种驻极体高熔指聚丙烯母粒制备方法,步骤包括:
101、将原料进行混合;
将聚丙烯粉料和二叔丁基过氧化物在低速搅拌机中混合均匀;
投入成核剂、抗氧剂、润滑剂和电介质在低速搅拌机中混合均匀分散。
102、将混合后的物料喂入挤出机;
挤出机为双螺杆挤出机,双螺杆挤出机长径比为48~60,挤出机筒体温度 设置为160~265℃;螺杆转速为300~600转/分钟,喂料机转速为28~48HZ, 聚丙烯在有机过氧化物类引发剂、高温熔融和螺杆剪切作用下,发生自由基降 解反应,完全降解不堵塞喷丝嘴。
103、在挤出机中对物料进行真空脱挥处理;
真空度为-0.12~-0.08MPa,排气脱挥、稳定化,即在塑化混炼的同时,脱 除聚合物中残留的各种单体、溶剂、水份、低聚物及其他各种挥发成份;通过 熔体过滤网截住混合中的不熔物和聚合物凝胶,反应后的物料熔体从挤出机模 头流出。
104、冷却成型,切粒;
物料熔体经温度为10℃~20℃的8米长的冷却水槽冷却,在切粒机牵引下 固化成条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机 切粒,形成物料粒子。
105、过筛转运;
物料粒子经过振动筛去掉连刀料、粘粒以及细小碎料之后,物料粒子经鼓 风送料机或罗茨风机送入循环烘料仓。
106、烘干。
物料粒子经温度设置为70℃~80℃的循环烘料仓,烘料4小时均化后,物 料粒子表面层所含水分及低沸点小分子有机物均会被热气流带出,达到干燥和 降低气味的目的。
实施例1:将50kg的聚丙烯粉料(牌号230粉)与二叔丁基过氧化600ml在 低速搅拌机中混合均匀,投入150克复配透明成核剂、200g抗氧剂1010、150g 润滑剂FFB、75g电介质、50kg的聚丙烯粉料(牌号230粉)在混料机低速搅拌机 中混合均匀分散,拌好的料经中间供料系统料斗喂料至挤出机;
双螺杆挤出机的长径比为48~60;挤出机筒体温度设置为160~250℃;螺 杆转速为300~600转/分钟,喂料机转速为28--48赫兹;聚丙烯在有机过氧化 物类引发剂、高温熔融和螺杆剪切作用下,发生自由基降解反应,完全降解不 堵塞喷丝嘴。
真空脱挥控制真空度在-0.12~-0.08MPa,排气脱挥、稳定化,即在塑化混 炼的同时,脱除聚合物中残留的各种单体、溶剂、水份、低聚物及其他各种挥 发成份;通过熔体过滤网截住混合中的不熔物和聚合物凝胶,利用自动换网器 实现不停机换网,反应后的熔体从挤出机模头流出;
而后立即经温度为10℃的8米长的冷却水槽冷却,在切粒机牵引下固化成 条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机切粒;
经过振动筛去掉连刀料、粘粒以及细小碎料之后,粒子经鼓风送料机或罗 茨风机送入循环烘料仓;
粒子经温度设置为80℃的循环烘料仓,烘料4小时均化后,粒子表面层所 含水分及低沸点小分子有机物均会被热气流带出,达到干燥和降低气味的目的。
本实施例经双螺杆挤出机挤出、拉条、冷却、切粒、烘干得产品。
本实施例测得产品熔指1380,颗粒半透发黄。
实施例2:将50kg的聚丙烯粉料(牌号230粉)与700ml二叔丁基过氧化物 在低速搅拌机中混合均匀,投入200克复配透明成核剂、250g1010抗氧剂、200g 润滑剂FFB和100g电介质在混料机低速搅拌机中混合均匀分散,拌好的料经中 间供料系统料斗喂料至挤出机;
双螺杆挤出机的长径比为48~60;挤出机筒体温度设置为160~250℃;螺 杆转速为300~600转/分钟,喂料机转速为28--48赫兹;聚丙烯在有机过氧化 物类引发剂、高温熔融和螺杆剪切作用下,发生自由基降解反应,分子量由高 变低,熔指由低变高;
真空脱挥控制真空度在-0.12~-0.08MPa,排气脱挥、稳定化,即在塑化混 炼的同时,脱除聚合物中残留的各种单体、溶剂、水份、低聚物及其他各种挥 发成份;通过熔体过滤网截住混合中的不熔物和聚合物凝胶,利用自动换网器 实现不停机换网,反应后的熔体从挤出机模头流出;
而后立即经温度为10℃的8米长的冷却水槽冷却,在切粒机牵引下固化成 条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机切粒;
经过振动筛去掉连刀料、粘粒以及细小碎料之后,粒子经鼓风送料机或罗 茨风机送入循环烘料仓;
粒子经温度设置为80℃的循环烘料仓,烘料4小时均化后,粒子表面层所 含水分及低沸点小分子有机物均会被热气流带出,达到干燥和降低气味的目的。
本实施例经双螺杆挤出机挤出、拉条、冷却、切粒、烘干得产品。
本实施例测得溶脂1650,颗粒透明
实施例3:将50kg的聚丙烯粉料(牌号230粉)与700ml二叔丁基过氧化物 在低速搅拌机中混合均匀,投入200g YJ598二氧化硅、300g氧化锌、200g润滑 剂EBS和100g电介质在混料机低速搅拌机中混合均匀分散,拌好的料经中间供 料系统料斗喂料至挤出机;
双螺杆挤出机的长径比为48~60;挤出机筒体温度设置为160~250℃;螺 杆转速为300~600转/分钟,喂料机转速为28--48赫兹;聚丙烯在有机过氧化 物类引发剂、高温熔融和螺杆剪切作用下,发生自由基降解反应,分子量由高 变低,熔指由低变高;
真空脱挥控制真空度在-0.12~-0.08MPa,排气脱挥、稳定化,即在塑化混 炼的同时,脱除聚合物中残留的各种单体、溶剂、水份、低聚物及其他各种挥 发成份;通过熔体过滤网截住混合中的不熔物和聚合物凝胶,利用自动换网器 实现不停机换网,反应后的熔体从挤出机模头流出;
而后立即经温度为20℃的8米长的冷却水槽冷却,在切粒机牵引下固化成 条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机切粒;
经过振动筛去掉连刀料、粘粒以及细小碎料之后,粒子经鼓风送料入袋
本实施例经双螺杆挤出机挤出、拉条、冷却、切粒得产品。
本实施例测得溶脂1050,流体发白
实施例4:将50kg的聚丙烯粉料(牌号230粉)与800ml二叔丁基过氧化物 在低速搅拌机中混合均匀,投入200克复配透明成核剂、300g1010抗氧剂、200g 润滑剂FFB和100g电介质在混料机低速搅拌机中混合均匀分散,拌好的料经中 间供料系统料斗喂料至挤出机;
双螺杆挤出机的长径比为48~60;挤出机筒体温度设置为170~260℃;螺 杆转速为300~600转/分钟,喂料机转速为28--48赫兹;聚丙烯在有机过氧化 物类引发剂、高温熔融和螺杆剪切作用下,发生自由基降解反应,驻极高熔指 聚丙烯颗粒加热降解后电介质放电性能会得到进一步加强,温度提高十度其效 果倍增,并且细度越细,产生的静电越多,吸附能力也相应增强。
真空脱挥控制真空度在-0.12~-0.08MPa,排气脱挥、稳定化,即在塑化混 炼的同时,脱除聚合物中残留的各种单体、溶剂、水份、低聚物及其他各种挥 发成份;通过熔体过滤网截住混合中的不熔物和聚合物凝胶,利用自动换网器 实现不停机换网,反应后的熔体从挤出机模头流出;
而后立即经温度为15℃的8米长的冷却水槽冷却,在切粒机牵引下固化成 条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机切粒;
经过振动筛去掉连刀料、粘粒以及细小碎料之后,粒子经鼓风送料机或罗 茨风机送入循环烘料仓;
粒子经温度设置为70℃的循环烘料仓,烘料4小时均化后,粒子表面层所 含水分及低沸点小分子有机物均会被热气流带出,达到干燥和降低气味的目的。
本实施例经双螺杆挤出机挤出、拉条、冷却、切粒、烘干得产品。
本实施例测得溶脂1850,颗粒透明
实例5:将50kg的聚丙烯粉料(牌号430粉)与700ml二叔丁基过氧化物在 低速搅拌机中混合均匀,投入150克复配透明成核剂、200g1010抗氧剂、150g 润滑剂FFB和100g电介质在混料机低速搅拌机中混合均匀分散,拌好的料经中 间供料系统料斗喂料至挤出机;
双螺杆挤出机的长径比为48~60;挤出机筒体温度设置为170~265℃;螺 杆转速为300~600转/分钟,喂料机转速为28--48赫兹;聚丙烯在有机过氧化 物类引发剂、高温熔融和螺杆剪切作用下,发生自由基降解反应,能长期有效 释放负离子和储存电荷
真空脱挥控制真空度在-0.12~-0.08MPa,排气脱挥、稳定化,即在塑化混 炼的同时,脱除聚合物中残留的各种单体、溶剂、水份、低聚物及其他各种挥 发成份;通过熔体过滤网截住混合中的不熔物和聚合物凝胶,利用自动换网器 实现不停机换网,反应后的熔体从挤出机模头流出;
而后立即经温度为20℃的8米长的冷却水槽冷却,在切粒机牵引下固化成 条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机切粒;
经过振动筛去掉连刀料、粘粒以及细小碎料之后,粒子经鼓风送料机或罗 茨风机送入循环烘料仓;
粒子经温度设置为70℃的循环烘料仓,烘料4小时均化后,粒子表面层所 含水分及低沸点小分子有机物均会被热气流带出,达到干燥和降低气味的目的。
本实施例经双螺杆挤出机挤出、拉条、冷却、切粒、烘干得产品。
本实施例测得产品溶脂1520。
在本申请实施例中,由于采用上述技术方案,以低流动性聚丙烯为基材, 使用高性能复配型电介质,加入成核剂、抗氧剂、润滑剂等进行均匀混合生产, 解决了单一聚丙烯颗粒材料难分散、易堵喷嘴、不稳定易漂移的问题。电介质 永久性的释放电荷、空气负离子,增加熔喷布静电吸附和负离子杀菌的能力, 有效阻隔微米以下的飞沫、粉尘、病毒等。能长期有效释放负离子和储存电荷, 达到提高熔喷无纺布的综合过滤效果和抗热衰减的性能。由于其优异的高性能 熔体流动指数使其在同样纤维细度和克重的情况下,降低熔喷无纺布产品阻力, 提高熔喷无纺布产品过滤效果,触摸尤如婴儿肌肤般柔软细腻光滑;同时有效 防止熔喷无纺布变脆、变形、收缩、黄变等故障现象。物料均匀分散,有效避 免了材料团聚而发生的喷头堵塞问题,不会堵塞喷丝嘴,适用于熔喷工艺,制 作熔喷布。
还需要说明的是,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他 性的包含,从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那 些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方 法、商品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一 个……”限定的要素,并不排除在包括所述要素的过程、方法、商品或者设备中 还存在另外的相同要素。
以上仅为本申请的实施例而已,并不用于限制本申请。对于本领域技术人 员来说,本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的 任何修改、等同替换、改进等,均应包含在本申请的权利要求范围之内。
Claims (10)
1.一种驻极体高熔指聚丙烯母粒,其特征在于,重量百分比组成为:
聚丙烯粉料95%~99%;
二叔丁基过氧化物0.3%~2%;
成核剂0.1%~0.3%;
抗氧剂:0.2%~1%;
润滑剂0.1%~0.5%;
电介质0.2%~1%。
2.根据权利要求1所述的驻极体高熔指聚丙烯母粒,其特征在于,所述聚丙烯粉料为均聚聚丙烯(PPH)、无规共聚聚丙烯(PPR)中的任意一种或两种的混合物。
3.根据权利要求1或2所述的驻极体高熔指聚丙烯母粒,其特征在于,所述抗氧剂为1010抗氧剂、168抗氧剂中的任意一种或两种的混合物。
4.根据权利要求1所述的驻极体高熔指聚丙烯母粒,其特征在于,所述电介质化学通式为NaR3AI6Si6O18BO33(OH,F)4,晶体属三方晶系的环状结构硅酸盐矿物的总称,式中R代表金属阳离子,当R为Fe2+时,构成黑色晶体电介质。
5.根据权利要求3所述的驻极体高熔指聚丙烯母粒,其特征在于,当所述抗氧化剂为1010抗氧剂和168抗氧剂两种的混合物时,1010抗氧剂的重量百分比为0.1%~0.5%,168抗氧剂的重量百分比为0.1%~0.5%。
6.一种驻极体高熔指聚丙烯母粒制备方法,其特征在于,步骤包括:
将原料进行混合;
将混合后的物料喂入挤出机;
在挤出机中对物料进行真空脱挥处理;
冷却成型,切粒;
过筛转运;
烘干。
7.根据权利要求6所述的驻极体高熔指聚丙烯母粒制备方法,其特征在于,所述将原料进行混合具体为:将聚丙烯粉料和二叔丁基过氧化物在低速搅拌机中混合均匀;投入成核剂、抗氧剂、润滑剂和电介质在低速搅拌机中混合均匀分散。
8.根据权利要求6或7所述的驻极体高熔指聚丙烯母粒制备方法,其特征在于,所述冷却成型,切粒具体为:物料熔体经温度为10℃~20℃的8米长的冷却水槽冷却,在切粒机牵引下固化成条状在冷却水槽中冷却成型,经两个除水装置鼓风吹干后进龙门切粒机切粒,形成物料粒子。
9.根据权利要求6所述的驻极体高熔指聚丙烯母粒制备方法,其特征在于,所述烘干具体为:物料粒子经温度设置为70℃~80℃的循环烘料仓,烘料4小时均化后,物料粒子表面层所含水分及低沸点小分子有机物均会被热气流带出,达到干燥和降低气味的目的。
10.根据权利要求6所述的驻极体高熔指聚丙烯母粒制备方法,其特征在于,所述真空脱挥处理中真空度为-0.12~-0.08MPa。
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