CN104629182B - 一种bopp膜用珠光母粒及其制备方法 - Google Patents

一种bopp膜用珠光母粒及其制备方法 Download PDF

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CN104629182B
CN104629182B CN201510074820.XA CN201510074820A CN104629182B CN 104629182 B CN104629182 B CN 104629182B CN 201510074820 A CN201510074820 A CN 201510074820A CN 104629182 B CN104629182 B CN 104629182B
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戴成章
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Abstract

本发明提供了一种BOPP膜用珠光母粒,包括以下组分及其质量百分比含量:PP改性树脂60%‑74%、珠光粉23%‑37%、硬脂酸锌0.5%、抗氧剂1.3%、聚烯烃类超分散剂1%、白油0.2%。本发明还提供了一种BOPP膜用珠光母粒的制备方法,通过将上述各组分按照一定顺序在高混机中均匀混合后,再经过熔融挤出,造粒及后处理得到所述珠光母粒。本发明所得珠光母粒具有高分散度、低比重、低密度和高光泽度的优点,并且在生产BOPP珠光膜时,加入本发明所得珠光母粒可以避免了滤网的堵塞和珠光膜的破裂。

Description

一种BOPP膜用珠光母粒及其制备方法
技术领域
本发明涉及一种珠光母粒及其制备方法,尤其是涉及一种BOPP膜用珠光母粒及其制备方法。
背景技术
BOPP珠光膜阻隔性优良,在实际的生产加工过程中加入一定量的珠光颜料,具有一定的珠光效果,装饰性很强,所以该材料广泛的用于产品包装,尤其是冷饮的包装。BOPP珠光膜的最大特点是其具有珍珠般的光泽,而这一特点都归功于其中添加的珠光母粒。
目前,厂家在生产BOPP珠光膜的过程中,大都加入添加含有碳酸钙的珠光母粒,但是碳酸钙与PP树脂不相容,在生产BOPP珠光膜的过程中需要加入大量的分散剂将母粒均匀分散,同时碳酸钙微粒十分容易发生团聚,在生产BOPP珠光膜过程中经常造成滤网的堵塞和薄膜的破裂,降低了生产的效率,不仅使成本提高,而且获得的BOPP珠光膜各项性能都不佳。
发明内容
本发明的目的,就是为了解决上述问题而提供了一种超分散高光泽度BOPP膜用珠光母粒。
本发明的另一个目的还在于提供了一种BOPP膜用珠光母粒的制备方法。
本发明的目的是这样实现的:
本发明的一种BOPP膜用珠光母粒包括以下组分及其质量百分比含量:PP改性树脂60%-74%、珠光粉23%-37%、硬脂酸锌0.5%、抗氧剂1.3%、聚烯烃类超分散剂1%、白油0.2%。
上述硬脂酸锌主要作用是提高生产效率和材料流动性,环保且成本低廉。
上述聚烯烃类超分散剂的分子结构分为两部分:其中一部分为锚固基团,常见的有羧基、多元胺、多元醇及聚醚等;另一部分为溶剂化链,常见的有聚酯、聚醚、聚烯烃及聚丙烯酸酯等。
上述的一种BOPP膜用珠光母粒,其中,所述的PP改性树脂的制备步骤如下:将70重量份的均聚PP树脂粉、25重量份且粒径为2.5μm超细碳酸钙以及5重量份的油酸酰胺通过捏合造粒制得。
上述的一种BOPP膜用珠光母粒,其中,所述的珠光粉是金属氧化物包覆的云母,云母粒径为8-10μm。
上述的一种BOPP膜用珠光母粒,其中,所述的珠光粉的制备步骤如下:将80重量份的云母粉和20重量份的二氧化硅经包膜处理后,再经850℃高温烧制而成。
上述的一种BOPP膜用珠光母粒,其中,所述的抗氧剂采用受阻酚类抗氧剂与亚磷酸酯抗氧剂按质量比1:3进行复配制得。
上述的一种BOPP膜用珠光母粒的制备方法,包括以下步骤:
(1)按照以下组分及其质量百分比含量准备原料:
(2)先将PP改性树脂与白油在高混机混合3分钟,转速为每分钟350rpm;再加珠光粉、硬脂酸锌、抗氧剂和聚烯烃类超分散剂高速混合5分钟,转速为每分钟350rpm,以使物料混合均匀;
(3)将混合好的物料加入双螺杆挤出机中,螺杆长径比为48:1,螺杆转速为450-500转/分钟,挤出温度200-230℃之间,过滤网200目;
(4)对挤出的物料拉条,并进入水槽,水槽温度50℃,风干、切粒、震动分离、烘干、包装得到成品。
与现有技术相比,本发明避免在制备珠光母粒中加入大量碳酸钙,而使用特制的珠光粉与PP改性树脂,不仅使所得珠光母粒具有高分散度、低比重、低密度和高光泽度的优点,而且在生产BOPP珠光膜时,加入本发明所得珠光母粒可以避免了滤网的堵塞和珠光膜的破裂。
具体实施方式
以下通过具体实施例进一步介绍本发明的实施及所具有的有益效果,目的在于帮助阅读者更好理解本发明的实质和精神,不能构成对本发明实施范围的限定。
对照例
按照现有技术,BOPP膜用珠光母粒的制备方法,包括以下步骤:
先将25%重量的等规PP树脂与70%重量的微粉碳酸钙(1μm<d<5μm)加入高速搅拌机搅拌8分钟,随后往搅拌机中添加1.2%重量的表面活性剂(复配脂肪酸)、0.2%重量的抗氧剂(1010、168)、3.6%重量的润滑剂(聚乙烯蜡)等原材料通过高速混料机混合3分钟后,再从下料斗进入计量喂料器,再经双螺杆挤出机进行塑化、熔融、挤出、冷却、风干、切粒、烘干、包装得到产品。
实施例
实施例1
一种BOPP膜用珠光母粒的制备方法,包括以下步骤:
(1)按照以下组分及质量百分比含量准备原料:PP改性树脂72%、珠光粉25%、硬脂酸锌0.5%、抗氧剂1.3%、聚烯烃类超分散剂1%、白油0.2%。所述PP改性树脂由70重量份的均聚PP树脂粉、25重量份且粒径为2.5μm超细碳酸钙以及5重量份的油酸酰胺通过捏合造粒制得。所述抗氧剂采用受阻酚类抗氧剂与亚磷酸酯抗氧剂按质量比1:3复配而成。
(2)先将PP改性树脂与白油在高混机混合3分钟,转速为每分钟350rpm;再加珠光粉、硬脂酸锌、抗氧剂和聚烯烃类超分散剂高速混合5分钟,转速为每分钟350rpm,以使物料混合均匀。
(3)将混合好的物料加入双螺杆挤出机中,螺杆长径比为48:1,螺杆转速为450-500转/分钟,挤出温度200-230℃之间,过滤网200目,以达到很好的塑化、分散效果;
(4)对挤出的物料拉条,并进入水槽,水槽温度50℃,风干、切粒、震动分离、烘干、包装得到成品。
上述原料中,均聚PP树脂选用茂名石化实华股份有限公司、型号为045的产品,受阻酚类抗氧剂选用瑞士汽巴精化控股有限公司、型号为1076的产品,亚磷酸酯抗氧剂选用瑞士汽巴精化控股有限公司、型号为TPP的产品。
实施例2
一种BOPP膜用珠光母粒的制备方法,包括以下步骤:
(1)按照以下组分及质量百分比含量准备原料:PP改性树脂62%、珠光粉35%、硬脂酸锌0.5%、抗氧剂1.3%、聚烯烃类超分散剂1%、白油0.2%。所述PP改性树脂由70重量份的均聚PP树脂粉、25重量份且粒径为2.5μm超细碳酸钙以及5重量份的油酸酰胺通过捏合造粒制得。所述抗氧剂采用受阻酚类抗氧剂与亚磷酸酯抗氧剂按质量比1:3复配而成。
(2)先将PP改性树脂与白油在高混机混合3分钟,转速为每分钟350rpm;再加珠光粉、硬脂酸锌、抗氧剂和聚烯烃类超分散剂高速混合5分钟,转速为每分钟350rpm,以使物料混合均匀。
(3)将混合好的物料加入双螺杆挤出机中,螺杆长径比为48:1,螺杆转速为450-500转/分钟,挤出温度200-230℃之间,过滤网200目,以达到很好的塑化、分散效果;
(4)对挤出的物料拉条,并进入水槽,水槽温度50℃,风干、切粒、震动分离、烘干、包装得到成品。
上述原料中,均聚PP树脂选用茂名石化实华股份有限公司、型号为045的产品,受阻酚类抗氧剂选用瑞士汽巴精化控股有限公司、型号为1076的产品,亚磷酸酯抗氧剂选用瑞士汽巴精化控股有限公司、型号为TPP的产品。
将对照例、实施例1及实施例2所得的珠光母粒进行性能测试,测定结果如下表所示:
由上表可知,从比重、光泽度、薄膜密度等几个性能指标来看,通过本发明所得珠光母粒比现有技术所得珠光母粒的性能有显著提高。通过本发明所得珠光母粒比现有技术所得珠光母粒在比重方面至少降低了18.4%,在光泽度方面至少提高了22.7%,在密度方面至少降低了21.2%。综上所述,本发明所得珠光母粒具有低比重、高光泽度和低密度的优良性质。

Claims (3)

1.一种BOPP膜用珠光母粒,其特征在于,包括以下组分及其质量百分比含量:
PP改性树脂 60%-74%;
珠光粉 23%-37%;
硬脂酸锌 0.5%;
抗氧剂 1.3%;
聚烯烃类超分散剂 1%;
白油 0.2%;
所述的珠光粉的制备步骤如下:将80重量份的云母粉和20重量份的二氧化硅经包膜处理后,再经850℃高温烧制而成;
所述聚烯烃类超分散剂的分子结构分为两部分:其中一部分为锚固基团,有羧基、多元胺基团、或多元醇基团;另一部分为溶剂化链,有聚酯、聚醚、聚烯烃、或聚丙烯酸酯;
所述的PP改性树脂的制备步骤如下:将70重量份的均聚PP树脂粉、25重量份且粒径为2.5μm超细碳酸钙以及5重量份的油酸酰胺通过捏合造粒制得。
2.如权利要求1所述的一种BOPP膜用珠光母粒,其特征在于,所述的抗氧剂采用受阻酚类抗氧剂与亚磷酸酯抗氧剂按质量比1:3进行复配制得。
3.一种如权利要求1所述的BOPP膜用珠光母粒的制备方法,其特征在于,包括以下步骤:
(1)按照以下组分及其质量百分比含量准备原料:
PP改性树脂 60%-74%;
珠光粉 23%-37%;
硬脂酸锌 0.5%;
抗氧剂 1.3%;
聚烯烃类超分散剂 1%;
白油 0.2%;
(2)先将PP改性树脂与白油在高混机混合3分钟,转速为每分钟350rpm;再加珠光粉、硬脂酸锌、抗氧剂和聚烯烃类超分散剂高速混合5分钟,转速为每分钟350rpm,以使物料混合均匀;
(3)将混合好的物料加入双螺杆挤出机中,螺杆长径比为48:1,螺杆转速为450-500转/分钟,挤出温度200-230℃之间,过滤网200目;
(4)对挤出的物料拉条,并进入水槽,水槽温度为50℃,风干、切粒、震动分离、烘干、包装得到成品。
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