CN110452500B - 一种易涂布基材膜的制备方法 - Google Patents
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Abstract
本发明公开了一种易涂布基材膜的制备方法,其特征在于,包括步骤:制备改性基材膜:按比例称取基材配料,混合均匀后加入吹膜机中,以平挤上吹法,经挤出、吹胀成型、冷却等步骤后得到改性基材膜;所述基材配料包括80~120份改性超支化聚酯,10~12份甘油甲酸酯,5~10份亚磷酸酯和1~2份二氧化硅和0.5~1份分散剂;粗糙化处理:通过电晕法对基材膜的表面进行预处理;收卷。通过本发明公开的制备方法,可得到易涂布、性能稳定持久的基材膜材料,且制备过程简单,适合大规模生产。
Description
技术领域
本发明涉及高分子材料领域,具体来说是一种易涂布基材膜的制备方法。
背景技术
薄膜及其衍生材料应用于我们日常生活和生产的方方面面,为了满足使用需要,往往需要通过各种加工工艺赋予膜材料特殊性能。例如,农业大棚在棚内的高湿度下,当外界温度低于水蒸气的露点时,会在棚膜上结霜,细小的露珠使棚内光照水平大大降低,从而影响植物的正常生长,因此需要生产出具有良好防雾性能的膜材料。
目前,功能性膜材料大多是通过在薄膜基材层上涂布特殊功能物质的方法实现的,因此,基材层本身是否容易均匀涂布对加工后膜材料的使用性能和寿命有着决定性意义。
发明内容
本发明旨在提供一种基材膜的制备方法,该制备方法生产得到的基材膜容易涂布,且涂布层分散均匀、与基材层结合紧密,性能稳定、使用寿命长,能应用于各类功能膜材料的生产工艺中。
本发明的上述技术目的是通过以下技术方案得以实现的:一种易涂布基材膜的制备方法,包括以下步骤:
(1)制备改性基材膜:按比例称取基材配料,混合并高速搅拌30分钟,混合均匀,备用;将混合均匀的基材配料加入吹膜机中,以平挤上吹法,经挤出、吹胀成型、冷却等步骤后得到改性基材膜;所述基材配料包括 80~120份改性超支化聚酯,10~12份甘油甲酸酯,5~10份亚磷酸酯和1~2份二氧化硅和0.5~1份分散剂,搅拌速度控制为600~750转/分钟;
(2)粗糙化处理:通过电晕法对基材膜的表面进行预处理,处理参数设置为电压12000~18000V/m2、电极间隙1.5~2mm、处理速度0.1~20m/s;
(3)收卷;
其中,改性超支化聚酯的制备方法为:以重量计,将5~8份2-羟甲基丙酸、2~3份三羟甲基丙烷、2~3份间二甲苯和0.1~0.5份对甲苯磺酸,在保护气下,140~155℃回流至溶液酸值为22~25mg KOH·g-1,继续加入10~18份三羟甲基丙烷、3~4份间二甲苯和0.01~0.1份对甲苯磺酸,在140~155 ℃下回流2~2.5小时后,以2℃/min的升温速度升温至180℃,当酸值为18~20mg KOH·g-1时停止反应,旋蒸得到超支化聚酯材料;取20~25份上述超支化聚酯、5~10份己内酯和0.2~1份桂酸二丁基锡催化剂,在保护气下,160~170℃回流2小时,旋蒸除去溶剂,得到改性超支化聚酯材料。
进一步地,所述保护气为氮气、氩气、氦气中的一种,优选为氮气。
进一步地,所述分散剂为微晶蜡和蒙旦蜡的混合物,两者质量比为2~4:1,优选为3:1。
本发明与现有技术相比,具有以下的优点和效果:
1.改性超支化聚酯的性能相对于未改性的聚酯粘度显著降低、柔韧性和耐冲击性能均明显改善,且具有优异的耐酸、碱等化学品性能,改性基材膜以改性超支化聚酯为主要材料,具有易涂布、耐冲击等优异性能;
2.通过电晕处理法对基材膜的表面进行粗糙化处理,处理后的膜材料表面粗糙度得到提高,起到活化作用,经该处理后的基材膜可与涂布层结合更加紧密,性能稳定、寿命更久。另外,电晕处理还有除去油污、水汽和尘垢等作用,能明显改善塑料表面的润湿性和附着性。
3.改性基材膜材料中加入了抗氧化剂亚磷酸酯和抗划伤剂二氧化硅,材料具有更好的使用寿命、强度性能等。
具体实施方式
实施例1
一种易涂布基材膜的制备方法,包括以下步骤:
(1)制备改性基材膜:按比例称取基材配料,混合并高速搅拌30分钟,混合均匀,备用;将混合均匀的基材配料加入吹膜机中,以平挤上吹法,经挤出、吹胀成型、冷却等步骤后得到改性基材膜;所述基材配料包括100份改性超支化聚酯,10份甘油甲酸酯,8份亚磷酸酯和2份二氧化硅和1份微晶蜡-蒙旦蜡(w1:w2=3:1)分散剂,搅拌速度控制为600~750转/分钟;
(2)粗糙化处理:通过电晕法对基材膜的表面进行预处理,处理参数设置为电压12000~18000V/m2、电极间隙1.5~2mm、处理速度0.1~20m/s;
(3)收卷;
其中,改性超支化聚酯的制备方法为:以重量计,将5~8份2-羟甲基丙酸、2~3份三羟甲基丙烷、2~3份间二甲苯和0.1~0.5份对甲苯磺酸,在氮气保护下,140~155 ℃回流至溶液酸值为22~25mg KOH·g-1,继续加入10~18份三羟甲基丙烷、3~4份间二甲苯和0.01~0.1份对甲苯磺酸,在140~155 ℃下回流2~2.5小时后,以2℃/min的升温速度升温至180℃,当酸值为18~20mg KOH·g-1时停止反应,旋蒸得到超支化聚酯材料;取20~25份上述超支化聚酯、5~10份己内酯和0.2~1份桂酸二丁基锡催化剂,在氮气保护下,160~170℃回流2小时,旋蒸除去溶剂,得到改性超支化聚酯材料。
Claims (5)
1.一种易涂布基材膜的制备方法,其特征在于,包括步骤:
(1)制备改性基材膜:按比例称取基材配料,混合并高速搅拌30分钟,混合均匀,备用;将混合均匀的基材配料加入吹膜机中,以平挤上吹法,经挤出、吹胀成型、冷却步骤后得到改性基材膜;所述基材配料包括80~120份改性超支化聚酯,10~12份甘油甲酸酯,5~10份亚磷酸酯和1~2份二氧化硅和0.5~1份分散剂,搅拌速度控制为600~750转/分钟;
(2)粗糙化处理:通过电晕法对基材膜的表面进行预处理,处理参数设置为电压12000~18000V/m2、电极间隙1.5~2mm、处理速度0.1~20m/s;
(3)收卷;
其中,改性超支化聚酯的制备方法为:以重量计,将5~8份2-羟甲基丙酸、2~3份三羟甲基丙烷、2~3份间二甲苯和0.1~0.5份对甲苯磺酸,在保护气下,140~155℃回流至溶液酸值为22~25mg KOH·g-1,继续加入10~18份三羟甲基丙烷、3~4份间二甲苯和0.01~0.1份对甲苯磺酸,在140~155℃下回流2~2.5小时后,以2℃/min的升温速度升温至180℃,当酸值为18~20mg KOH·g-1时停止反应,旋蒸得到超支化聚酯材料;取20~25份上述超支化聚酯、5~10份己内酯和0.2~1份桂酸二丁基锡催化剂,在保护气下,160~170℃回流2小时,旋蒸除去溶剂,得到改性超支化聚酯材料。
2.根据权利要求1所述的制备方法,其特征在于,所述保护气为氮气、氩气、氦气中的一种。
3.根据权利要求2所述的制备方法,其特征在于,所述保护气为氮气。
4.根据权利要求1所述的制备方法,其特征在于,所述分散剂为微晶蜡和蒙旦蜡的混合物,两者质量比为2~4:1。
5.根据权利要求4所述的制备方法,其特征在于,所述分散剂为微晶蜡和蒙旦蜡的混合物,两者质量比为3:1。
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