CN105968531A - 一种用元明粉改性的塑料填充母粒及其制备方法 - Google Patents
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Abstract
本发明涉及一种用元明粉改性的塑料填充母粒及其制备方法,属于塑料加工成型技术领域。塑料填充母粒包括以下重量份数的组分:元明粉100份、硬脂酸0.5‑3份、低碳链的饱和脂肪酸4‑6份、双乙撑钛酸酯‑三乙醇胺螯合物溶液1‑5份、树脂载体10‑15份。本发明采用元明粉为无机填料,其填充效果良好,且成本低、环保性能、透明度及光泽度好,制备出的填充母粒具有密度低、外观分散性好、拉伸强度、断裂伸长率、薄膜撕裂强度、抗冲击等力学性能好、环保型强等特点,是一种实用性及性价比高的填充改性透明母料。
Description
技术领域
本发明属于塑料加工成型技术领域,特别涉及一种用元明粉改性而成的用于塑料制品中的功能填充母粒。
背景技术
元明粉(Na2S04)属高结晶度无机化工原料,价格低廉、具有优异的折射率、粒径小、稳定性好、无毒等优点,在玻璃、印染、纺织、制革、采矿、医药等行业有广泛的应用。因其具有透明度高、固色性强、水溶性好的特点,将其进行表面活化处理后分散均匀,大大改善与树脂的相容性,添加到树脂中能很好的起到增强制品强度,提高透明度、表观视觉好的作用,现已大量应用于塑料行业中,尤其是用于具有透明性能的塑料制品中。
元明粉具有优异的光学特性,适用于填充透明塑料。但元明粉属于强极性物质,易吸收空气中的水分,这种吸水性能极大影响复合材料的机械性能,因此元明粉的强吸湿性成为其在塑料行业应用的瓶颈问题。经研究表明,元明粉结晶颗粒越细,比表面积越大,吸水面越大,吸水量随之增大,颗粒间接触点以及所形成结块的牢固度也会随之增加。另一方面,元明粉作为无机填料应用于高分子复合材料时,因其表面亲水疏油,在有机介质中难于均匀分散,与高聚物等基质无结合力,易造成界面缺失,导致材料变次。
目前透明粉可替代碳酸钙填充母粒,但因透明粉具有析出(吸潮)性,在部分塑料制品中使用受到一定限制,所以现有技术采用基本达不到解决析出问题,都存在短时间析出现象而造成塑料制品外观“喷霜”、“长毛”现象,所以一般采用对粉体进行表面处理来缓解析出时间,在现有技术中解决元明粉析出问题采用的如下配方设计:元明粉100份、树脂10-15份、硬脂酸2-6份、石蜡6-8份。而配方中引入了硬脂酸和石蜡之后会降低元明粉的透明度,同时该配方设计而成的产品在后续中易产生团聚现象,使塑料制品的强度性能下降,外观不光滑平整,也不能解决塑料制品外观“喷霜”、“长毛”的问题。比如单单采用硬脂酸来进行表面处理,虽有一定的效果,但根本很难达到四个月时间不析出的底线,因为元明粉的独特特性是很难改变的。
发明内容
为了解决上述问题,本发明提供一种以元明粉为原料通过改性而用于塑料制品中作为填充功能母粒及其制备方法。
本发明主要通过以下技术方案来实现:
一种用元明粉改性的塑料填充母粒,包括以下重量份数的组分:
元明粉:100份; 硬脂酸:0.5-3份;
低碳链的饱和脂肪酸:4-6份;
双乙撑钛酸酯-三乙醇胺螯合物溶液:1-5份;
树脂载体:10-15份。
作为优选:元明粉:100份;硬脂酸:1.5份;低碳链的饱和脂肪酸:5.5份;双乙撑钛酸酯-三乙醇胺螯合物溶液:3份;树脂载体:12份。
所述的低碳链的饱和脂肪酸为十六碳的饱和脂肪酸,主要成份是从棕榈树所得的油。
所述树脂载体为热塑型聚烯烃树脂,选自聚乙烯系列(LDPE、LLDPE、HDPE)、聚丙烯系列(无规聚丙烯、等规聚丙烯)、聚氯乙烯、聚苯乙烯中的一种或几种。
一种用元明粉改性的塑料填充母粒的制备方法,包括以下步骤:
(1)将元明粉进行微米级细化处理成粉体;
(2)将细化粉体投入到1470转/分的高速混合机中高速处理5~8分钟,粉体温度达到105~115℃,加入硬脂酸、低碳链饱和脂肪酸和双乙撑钛酸酯-三乙醇胺螯合物溶液反应2min,最后加入树脂载体高速混合均匀塑炼成形;
(3)塑炼成形料通过强制喂料系统,同向双螺杆混炼机组混炼、熔融塑化经过料筒温度为150~220℃的双螺杆挤出、热切、离心脱水分离机组、旋风沸腾干燥机、加长式振动筛净化风送料仓而成。
步骤(1)中的元明粉细化处理后的粉体粒径为1-15微米。
本发明从根本上解决了元明粉的析出、团聚问题,方案的设计主要从以下两个方面进行设计:第一方面,从配方设计方面采用真正意义上的包覆和阻隔,防止其使用过程中析出问题;硬脂酸和低碳链饱和脂肪酸恰当的匹配可以得到结晶型的脂肪类产品,它即能与粉体很好的结合,又可以对高分子材料有较好的相容,成为真正意义的包覆的前提条件;第二方面,引入双乙撑钛酸酯-三乙醇胺螯合物溶液,它能够完全的渗透到高分子树脂和表面活化处理的细粉间隙中,形成偶联而增强界面相容性和分散性,配方设计引入全新的表面处理复配理论,减少影响透明性功能助剂的量,增加界面相容性和降低分子间相互作用力,防止其产生团聚现象。
该配方设计后采用高速混合改性处理工序,双婉强制喂料,双螺杆塑化造粒机组进行生产,其母粒产品可在纯净水中放置两天无咸味,而用于塑料制品中四个月不析出。
采用本发明配方制备的塑料填充母粒,可以提高母粒的填充效果,降低成本,增加塑料的环保性能,透明度、光泽度及白度,减轻塑料成品的重量,添加到塑料制品中不会造成“盐析”、“喷霜”、“长毛”等不利于制品使用和影响性能的现象;制备的填充母粒具有密度低、外观分散性好、拉伸强度、断裂伸长率、薄膜撕裂强度、抗冲击等力学性能好、环保型强等特点,是一种实用性及性价比高的填充改性透明母料。
具体实施方式
下面结合具体的实施例做进一步的说明。
实施例1
一种用元明粉改性的塑料填充母粒,包括以下重量份数的组分:
元明粉:100份; 硬脂酸:0.5份;
低碳链的饱和脂肪酸:4份; 双乙撑钛酸酯-三乙醇胺螯合物溶液:1份;
聚乙烯树脂:10份。
一种用元明粉改性的塑料填充母粒的制备方法,包括以下步骤:
(1)将元明粉通过不锈钢粉体微细化机组进行微米级细化处理成粉体;
(2)将细化粉体投入到1470转/分的高速混合机中高速处理5~8分钟,粉体温度达到105~115℃,加入硬脂酸、低碳链饱和脂肪酸和双乙撑钛酸酯-三乙醇胺螯合物溶液反应2min,最后加入聚乙烯树脂高速混合均匀塑炼成形;
(3)塑炼成形料通过强制喂料系统,同向双螺杆混炼机组混炼、熔融塑化经过料筒温度为150~220℃的双螺杆挤出、热切、离心脱水分离机组、旋风沸腾干燥机、加长式振动筛净化风送料仓而成。
实施例2
一种用元明粉改性的塑料填充母粒,包括以下重量份数的组分:
元明粉:100份; 硬脂酸:1.5份;
低碳链的饱和脂肪酸:5.5份;
双乙撑钛酸酯-三乙醇胺螯合物溶液:3份;
聚丙烯树脂:12份。
一种用元明粉改性的塑料填充母粒的制备方法,包括以下步骤:
(1)将元明粉通过不锈钢粉体微细化机组进行微米级细化处理成粉体;
(2)将细化粉体投入到1470转/分的高速混合机中高速处理5~8分钟,粉体温度达到105~115℃,加入硬脂酸、低碳链饱和脂肪酸和双乙撑钛酸酯-三乙醇胺螯合物溶液反应2min,最后加入聚丙烯树脂高速混合均匀塑炼成形;
(3)塑炼成形料通过强制喂料系统,同向双螺杆混炼机组混炼、熔融塑化经过料筒温度为150~220℃的双螺杆挤出、热切、离心脱水分离机组、旋风沸腾干燥机、加长式振动筛净化风送料仓而成。
实施例3
一种用元明粉改性的塑料填充母粒,包括以下重量份数的组分:
元明粉:100份; 硬脂酸:0.5-3份;
低碳链的饱和脂肪酸:4-6份; 双乙撑钛酸酯-三乙醇胺螯合物溶液:1-5份;
聚苯乙烯树脂:10-15份。
一种用元明粉改性的塑料填充母粒的制备方法,包括以下步骤:
(1)将元明粉通过不锈钢粉体微细化机组进行微米级细化处理成粉体;
(2)将细化粉体投入到1470转/分的高速混合机中高速处理5~8分钟,粉体温度达到105~115℃,加入硬脂酸、低碳链饱和脂肪酸和双乙撑钛酸酯-三乙醇胺螯合物溶液反应2min,最后加入聚苯乙烯树脂高速混合均匀塑炼成形;
(3)塑炼成形料通过强制喂料系统,同向双螺杆混炼机组混炼、熔融塑化经过料筒温度为150~220℃的双螺杆挤出、热切、离心脱水分离机组、旋风沸腾干燥机、加长式振动筛净化风送料仓而成。
将上述实施例制得的填充母粒及传统母粒添加到聚乙烯塑料中,混合后进行挤出制片和吹膜,填充母粒及聚乙烯的质量比为25:75,按GB/T13022-1991测试拉伸强度及断裂伸长率,测试速度为200mm/min;按QB/T1130-1991测试薄膜撕裂强度,测试速度为50mm/min。结果如下表1所示:
表1.添加填充母粒后聚乙烯塑料制品的性能测试
从上表1可以看出,本发明填充母粒添加到聚乙烯塑料制品中,其拉伸强度、断裂伸长率、薄膜撕裂强度及抗冲击性能,相比于传统母粒其具有更好的力学性能,完全满足塑料制品的性能要求。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (6)
1.一种用元明粉改性的塑料填充母粒,其特征在于,包括以下重量份数的组分:
元明粉:100份;
硬脂酸:0.5-3份;
低碳链的饱和脂肪酸:4-6份;
双乙撑钛酸酯-三乙醇胺螯合物溶液:1-5份;
树脂载体:10-15份。
2.根据权利要求1所述的一种用元明粉改性的塑料填充母粒,其特征在于,所述的低碳链的饱和脂肪酸为十六碳的饱和脂肪酸。
3.根据权利要求1所述的一种用元明粉改性的塑料填充母粒,其特征在于,所述的树脂载体选自聚乙烯、聚丙烯、聚氯乙烯、聚苯乙烯中的一种或几种。
4.根据权利要求1所述的一种用元明粉改性的塑料填充母粒,其特征在于,包括以下重量份数的组分:元明粉:100份;硬脂酸:1.5份;低碳链的饱和脂肪酸:5.5份;双乙撑钛酸酯-三乙醇胺螯合物溶液:3份;树脂载体:12份。
5.根据权利要求1所述的一种用元明粉改性的塑料填充母粒的制备方法,其特征在于,包括以下步骤:
(1)将元明粉进行微米级细化处理成粉体;
(2)将细化粉体投入到1470转/分的高速混合机中高速处理5~8分钟,粉体温度达到105~115℃,加入硬脂酸、低碳链的饱和脂肪酸和双乙撑钛酸酯-三乙醇胺螯合物溶液反应2min,最后加入树脂载体高速混合均匀塑炼成形;
(3)塑炼成形料通过强制喂料系统,同向双螺杆混炼机组混炼、熔融塑化经过料筒温度为150~220℃的双螺杆挤出、热切、离心脱水分离机组、旋风沸腾干燥机、加长式振动筛净化风送料仓而成。
6.根据权利要求5所述的一种用元明粉改性的塑料填充母粒的制备方法,其特征在于,步骤(1)中的元明粉细化处理后的粉体粒径为1-15微米。
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CN104974426A (zh) * | 2015-07-30 | 2015-10-14 | 四川省洪雅青衣江元明粉有限公司 | 一种元明粉塑料填充改性透明母粒 |
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