CN109608868A - 一种疏水聚丙烯薄膜及其制备方法 - Google Patents

一种疏水聚丙烯薄膜及其制备方法 Download PDF

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CN109608868A
CN109608868A CN201811651585.8A CN201811651585A CN109608868A CN 109608868 A CN109608868 A CN 109608868A CN 201811651585 A CN201811651585 A CN 201811651585A CN 109608868 A CN109608868 A CN 109608868A
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Abstract

本发明公开了一种疏水聚丙烯薄膜及其制备方法,所述的疏水聚丙烯薄膜是由下述重量份的原料组成的:聚二甲基硅氧烷17‑20、氯化亚锡0.1‑0.2、三聚氰胺1‑2、十二醇10‑15、聚酰胺蜡微粉30‑40、双丙酮丙烯酰胺6‑8、高密度聚丙烯100‑140、铂催化剂0.1‑0.14、硅微粉3‑4、硬脂酸7‑9、对甲基苯磺酸0.1‑0.12。本发明采用十二醇酯处理硅微粉,与聚硅烷薄膜起到协同成膜的效果,提高了成膜的稳定性。

Description

一种疏水聚丙烯薄膜及其制备方法
技术领域
本发明属于薄膜领域,具体涉及一种疏水聚丙烯薄膜及其制备方法。
背景技术
丙烯薄膜是一种质量轻、无毒、价格便宜、性能优良、成型较容易和用途广泛的塑料制品。聚丙烯成型薄膜方法与用途有下列几种;
聚丙烯挤出吹膜薄膜,是一种生产设备简单、生产效率较高、价格便宜的制品。在食品包装和纺织品及民用生活杂品包装方面广泛应用。挤出流延成型薄膜,是一种透明度高、阻湿性好、耐热和耐寒性优良、易于热封合的薄膜,主要用于食品、纺织品及文具杂品等物品的包装,性能好于聚乙烯吹塑薄膜,因而广泛应用于纺织品、鲜花、食品、日用品的包装;
目前聚丙烯薄膜材料大多为可重复利用材料,而为了保持材料的清洁会需要经常水洗,然而目前市售的薄膜材料耐水性较差,长时间的浸泡就容易出现软化变形等现象,极大的影响了产品质量。
发明内容
本发明的目的在于针对现有技术的缺陷和不足,提供一种疏水聚丙烯薄膜及其制备方法。
为实现上述目的,本发明采用以下技术方案:
一种疏水聚丙烯薄膜,是由下述重量份的原料组成的:聚二甲基硅氧烷17-20、氯化亚锡0.1-0.2、三聚氰胺1-2、十二醇10-15、聚酰胺蜡微粉30-40、双丙酮丙烯酰胺6-8、高密度聚丙烯100-140、铂催化剂0.1-0.14、硅微粉3-4、硬脂酸7-9、对甲基苯磺酸0.1-0.12。
所述疏水聚丙烯薄膜的制备方法,包括以下步骤:
(1)取硬脂酸,加热熔化,与硅微粉混合,保温搅拌20-30分钟,加入十二醇,送入到反应釜中,升高温度为130-150℃,加入对甲基苯磺酸,保温搅拌2-3小时,出料冷却,得醇酯改性硅微粉;
(2)取聚二甲基硅氧烷,加入到其重量10-13倍的异丙醇中,搅拌均匀,得硅烷醇分散液;
(3)取上述醇酯改性硅微粉,与聚酰胺蜡微粉混合,加入到上述硅烷醇分散液中,升高温度为50-55℃,超声1-2小时,得硅烷改性溶液;
(4)取双丙酮丙烯酰胺,加入到其上述硅烷改性溶液中,搅拌均匀,送入到反应釜中,调节反应釜温度为150-170℃,加入三聚氰胺、氯化亚锡,保温搅拌1-2小时,出料,冷却至常温,送入到冰水浴中,加入铂催化剂,搅拌反应2-4小时,出料,送入到挤出机中,流延成膜,得膜料;
(5)取高密度聚丙烯,送入到挤出机中,流延成膜,将上述步骤(4)得到的膜料均匀的覆盖在该高密度聚丙烯薄膜表面,热压成型,冷却,即得所述疏水聚丙烯薄膜。
所述的一种疏水聚丙烯薄膜的制备方法,步骤(5)中所述的热压温度为96-110℃。
本发明的优点:
本发明首先采用硬脂酸、十二醇混合处理硅微粉,得到醇酯改性的硅微粉,再与聚酰胺蜡微粉共混,分散到聚二甲基硅氧烷的异丙醇溶液中,得硅烷改性溶液,再与双丙酮丙烯酰胺共混,在氯化亚锡催化作用下实现聚二甲基硅氧烷的环氧开环,从而改善了硅微粉在聚酰胺蜡粉间的分散相容性,之后在铂催化剂作用下成膜,得到高疏水、高力学性能、高稳定性的薄膜,然后将该薄膜覆在聚丙烯薄膜表面,热压成型,从而提高了成品薄膜的疏水、力学和薄膜的均匀稳定性,本发明采用十二醇酯处理硅微粉,与聚硅烷薄膜起到协同成膜的效果,提高了成膜的稳定性。
具体实施方式
实施例1
一种疏水聚丙烯薄膜,是由下述重量份的原料组成的:聚二甲基硅氧烷18、氯化亚锡0.15、三聚氰胺1.5、十二醇12、聚酰胺蜡微粉35、双丙酮丙烯酰胺7、高密度聚丙烯120、铂催化剂0.12、硅微粉3.5、硬脂酸8、对甲基苯磺酸0.1。
所述疏水聚丙烯薄膜的制备方法,包括以下步骤:
(1)取硬脂酸,加热熔化,与硅微粉混合,保温搅拌25分钟,加入十二醇,送入到反应釜中,升高温度为140℃,加入对甲基苯磺酸,保温搅拌2.5小时,出料冷却,得醇酯改性硅微粉;
(2)取聚二甲基硅氧烷,加入到其重量12倍的异丙醇中,搅拌均匀,得硅烷醇分散液;
(3)取上述醇酯改性硅微粉,与聚酰胺蜡微粉混合,加入到上述硅烷醇分散液中,升高温度为50℃,超声1.5小时,得硅烷改性溶液;
(4)取双丙酮丙烯酰胺,加入到其上述硅烷改性溶液中,搅拌均匀,送入到反应釜中,调节反应釜温度为160℃,加入三聚氰胺、氯化亚锡,保温搅拌1.5小时,出料,冷却至常温,送入到冰水浴中,加入铂催化剂,搅拌反应3小时,出料,送入到挤出机中,流延成膜,得膜料;
(5)取高密度聚丙烯,送入到挤出机中,流延成膜,将上述步骤(4)得到的膜料均匀的覆盖在该高密度聚丙烯薄膜表面,热压成型,冷却,即得所述疏水聚丙烯薄膜。
所述的一种疏水聚丙烯薄膜的制备方法,步骤(5)中所述的热压温度为100℃。
实施例2
一种疏水聚丙烯薄膜,是由下述重量份的原料组成的:聚二甲基硅氧烷20、氯化亚锡0.2、三聚氰胺2、十二醇15、聚酰胺蜡微粉40、双丙酮丙烯酰胺8、高密度聚丙烯140、铂催化剂0.14、硅微粉4、硬脂酸9、对甲基苯磺酸0.12。
所述疏水聚丙烯薄膜的制备方法,包括以下步骤:
(1)取硬脂酸,加热熔化,与硅微粉混合,保温搅拌30分钟,加入十二醇,送入到反应釜中,升高温度为150℃,加入对甲基苯磺酸,保温搅拌2-3小时,出料冷却,得醇酯改性硅微粉;
(2)取聚二甲基硅氧烷,加入到其重量13倍的异丙醇中,搅拌均匀,得硅烷醇分散液;
(3)取上述醇酯改性硅微粉,与聚酰胺蜡微粉混合,加入到上述硅烷醇分散液中,升高温度为55℃,超声2小时,得硅烷改性溶液;
(4)取双丙酮丙烯酰胺,加入到其上述硅烷改性溶液中,搅拌均匀,送入到反应釜中,调节反应釜温度为170℃,加入三聚氰胺、氯化亚锡,保温搅拌2小时,出料,冷却至常温,送入到冰水浴中,加入铂催化剂,搅拌反应4小时,出料,送入到挤出机中,流延成膜,得膜料;
(5)取高密度聚丙烯,送入到挤出机中,流延成膜,将上述步骤(4)得到的膜料均匀的覆盖在该高密度聚丙烯薄膜表面,热压成型,冷却,即得所述疏水聚丙烯薄膜。
所述的一种疏水聚丙烯薄膜的制备方法,步骤(5)中所述的热压温度为110℃。
实施例3
一种疏水聚丙烯薄膜,是由下述重量份的原料组成的:聚二甲基硅氧烷17、氯化亚锡0.1、三聚氰胺1、十二醇10、聚酰胺蜡微粉30、双丙酮丙烯酰胺6、高密度聚丙烯100、铂催化剂0.1、硅微粉3、硬脂酸7、对甲基苯磺酸0.1。
所述疏水聚丙烯薄膜的制备方法,包括以下步骤:
(1)取硬脂酸,加热熔化,与硅微粉混合,保温搅拌20分钟,加入十二醇,送入到反应釜中,升高温度为130℃,加入对甲基苯磺酸,保温搅拌2小时,出料冷却,得醇酯改性硅微粉;
(2)取聚二甲基硅氧烷,加入到其重量10倍的异丙醇中,搅拌均匀,得硅烷醇分散液;
(3)取上述醇酯改性硅微粉,与聚酰胺蜡微粉混合,加入到上述硅烷醇分散液中,升高温度为50℃,超声1小时,得硅烷改性溶液;
(4)取双丙酮丙烯酰胺,加入到其上述硅烷改性溶液中,搅拌均匀,送入到反应釜中,调节反应釜温度为150℃,加入三聚氰胺、氯化亚锡,保温搅拌1小时,出料,冷却至常温,送入到冰水浴中,加入铂催化剂,搅拌反应2小时,出料,送入到挤出机中,流延成膜,得膜料;
(5)取高密度聚丙烯,送入到挤出机中,流延成膜,将上述步骤(4)得到的膜料均匀的覆盖在该高密度聚丙烯薄膜表面,热压成型,冷却,即得所述疏水聚丙烯薄膜。
所述的一种疏水聚丙烯薄膜的制备方法,步骤(5)中所述的热压温度为96℃。
力学性能测试:
拉伸强度,纵/横≧40/20MPa ;
断裂伸长率,纵/横≧400%/500%
直角撕裂强度,纵/横≧100kgf/cm/140kgf/cm;
表面张力≧49×10-3N/m;
疏水性能测试:
本发明薄膜与水的接触角:125-133°;
将本发明的疏水聚丙烯薄膜、市售聚丙烯薄膜分别放在清水中浸泡12小时,出料干燥后测试:
本发明的疏水聚丙烯薄膜:
断裂伸长率降低率为0.1-0.2%;
拉伸强度降低率为1.1-1.5%;
市售聚丙烯薄膜:
断裂伸长率降低率为1.7-2.1%;
拉伸强度降低率为4.2-5.1%。

Claims (3)

1.一种疏水聚丙烯薄膜,其特征在于,它是由下述重量份的原料组成的:
聚二甲基硅氧烷17-20、氯化亚锡0.1-0.2、三聚氰胺1-2、十二醇10-15、聚酰胺蜡微粉30-40、双丙酮丙烯酰胺6-8、高密度聚丙烯100-140、铂催化剂0.1-0.14、硅微粉3-4、硬脂酸7-9、对甲基苯磺酸0.1-0.12。
2.一种如权利要求1所述疏水聚丙烯薄膜的制备方法,其特征在于,包括以下步骤:
(1)取硬脂酸,加热熔化,与硅微粉混合,保温搅拌20-30分钟,加入十二醇,送入到反应釜中,升高温度为130-150℃,加入对甲基苯磺酸,保温搅拌2-3小时,出料冷却,得醇酯改性硅微粉;
(2)取聚二甲基硅氧烷,加入到其重量10-13倍的异丙醇中,搅拌均匀,得硅烷醇分散液;
(3)取上述醇酯改性硅微粉,与聚酰胺蜡微粉混合,加入到上述硅烷醇分散液中,升高温度为50-55℃,超声1-2小时,得硅烷改性溶液;
(4)取双丙酮丙烯酰胺,加入到其上述硅烷改性溶液中,搅拌均匀,送入到反应釜中,调节反应釜温度为150-170℃,加入三聚氰胺、氯化亚锡,保温搅拌1-2小时,出料,冷却至常温,送入到冰水浴中,加入铂催化剂,搅拌反应2-4小时,出料,送入到挤出机中,流延成膜,得膜料;
(5)取高密度聚丙烯,送入到挤出机中,流延成膜,将上述步骤(4)得到的膜料均匀的覆盖在该高密度聚丙烯薄膜表面,热压成型,冷却,即得所述疏水聚丙烯薄膜。
3.根据权利要求2所述的一种疏水聚丙烯薄膜的制备方法,其特征在于,步骤(5)中所述的热压温度为96-110℃。
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