CN106146869A - 一种高粘结改性pet/pbt复合离型膜的制备方法 - Google Patents

一种高粘结改性pet/pbt复合离型膜的制备方法 Download PDF

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CN106146869A
CN106146869A CN201610590939.7A CN201610590939A CN106146869A CN 106146869 A CN106146869 A CN 106146869A CN 201610590939 A CN201610590939 A CN 201610590939A CN 106146869 A CN106146869 A CN 106146869A
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於险峰
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Abstract

本发明涉及一种高粘结改性PET/PBT复合离型膜的制备方法,包括复合基膜的改性制备,抗静电层的涂布和粘结力改性剂层的涂覆、离型剂的制备和涂布,再将涂布好的基膜经过热固化和光固化制备而成。本发明的基膜由PET/PBT薄膜,通过改性复合而成,大大提高复合离型膜基膜与离型剂之间的粘结力,避免离型剂与基膜之间的分离;对基膜表面电晕处理,提高了正硅酸乙酯涂料抗静电层与基膜的附着力;粘结力改性剂与改性复合离型膜表面的游离基反应,进一步提高了粘结力。热固化和光固化处理进一步增强了改性剂涂层和离型层的界面强度。本发明制备方法制得的改性复合离型膜提高了离型膜的刚度问题,有效的提高了基膜和离型剂之间的粘结力。

Description

一种高粘结改性PET/PBT复合离型膜的制备方法
技术领域
本发明涉及离型膜制备技术领域,尤其涉及一种高粘结改性PET/PBT复合离型膜的制备方法。
背景技术
离型膜是指表面具有分离性的薄膜,离型膜与特定的材料在有限的条件下接触后不具有粘性,或具有轻微的粘性。
通常情况下为了增加离型膜的离型力,会将离型膜表面涂覆离型剂于离型膜基材的表层上,让它对于各种不同的有机压感胶,如热融胶、亚克力胶和橡胶系的压感胶等,可以表现出极轻且稳定的离型力。根据不同所需离型膜离型力,隔离产品胶的粘性不同,离型力相对应调整,使之在剥离时达到极轻且稳定的离型力。
聚对苯二甲酸乙二醇酯(PET)是一种重要的工程塑料,具有优良的物理机械性能。聚对苯二甲酸丁二醇酯(PBT),属于聚酯系列,是乳白色半透明到不透明、结晶型热塑性聚酯树脂。与PET一起统称为热塑性聚酯,或饱和聚酯。改性PET/PBT离型膜就是以PET/PBT薄膜为基材,并在PET/PBT薄膜的表面涂上一层硅油,所以也叫硅油膜,使PET/PBT薄膜的表面光滑,从而降低PET/PBT薄膜表面的张力,使其具有较好的离型力,达到离型的效果。
然而,目前市场上的PET离型膜基材与离型膜上涂布的离型剂之间的粘结力普遍太小,很容易剥离,导致切割时发生“脱胶现象”,影响离型膜性能。因此,有必要开发一种高粘结力的改性PET/PBT复合离型膜。
发明内容
本发明的目的在于,提供一种高粘结改性PET/PBT复合离型膜的制备方法,以提高改性PET/PBT复合离型膜基膜与离型剂之间的粘结力,避免离型剂与基材之间的分离。
为解决上述技术问题,实现上述目的,本发明的技术方案如下:
本发明所述的一种高粘结改性PET/PBT复合离型膜,包括基膜、抗静电层、粘结力改性剂层和离型层,所述基膜为PET薄膜、PBT薄膜复合改性制备成的改性薄膜;所述的抗静电层设置于基膜与离型层之间,所述的抗静电涂层由正硅酸乙酯涂料构成;所述的粘结力改性剂层设置于抗静电层上;所述的离型层设置于基膜的一面,设置于所述的粘结力改性剂层。
所述的基膜按重量份计包括以下重量份组分:PET 50-70份、PBT 25-45份、端氢硅油10-20份、纳米氮化钛5-7份、硬脂酸钙1-3份、石蜡5-15份;
所述的离型层包括以下重量份的组分:导电聚合物树脂25-45份、甲基含氢硅油5-15份、乙烯基硅油40-60份、引发剂1-3份、抗氧化剂1-3份、增韧剂4-8份、硬脂酸钙1-3份。
优选的,所述的基膜按重量份计包括以下重量份组分:PET 55-65份、PBT 30-40份、端氢硅油12-18份、纳米氮化钛6-7份、硬脂酸钙2-3份、石蜡8-12份;
所述的离型层包括以下重量份的组分:导电聚合物树脂30-40份、甲基含氢硅油8-12份、乙烯基硅油45-55份、引发剂2-3份、抗氧化剂1-2份、增韧剂5-7份、硬脂酸钙2-3份。
优选的,所述的基膜按重量份计包括以下重量份组分:PET 60份、PBT 35份、端氢硅油15份、纳米氮化钛6份、硬脂酸钙2份、石蜡10份;
所述的离型层包括以下重量份的组分:导电聚合物树脂35份、甲基含氢硅油10份、乙烯基硅油50份、引发剂2份、抗氧化剂2份、增韧剂6份、硬脂酸钙2份。
优选的,本发明所述的一种高粘结改性PET/PBT复合离型膜,其制备方法包括以下步骤:
(1)称取配方重量份的PET、PBT、端氢硅油、纳米氮化钛、硬脂酸钙、石蜡混合改性,熔融挤出制造改性PET/PBT复合基膜薄片;
(2)热风清理改性PET/PBT复合基膜薄片表面、电晕处理基膜表面,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层、烘干;
(4)称取配方量的导电聚合物树脂、甲基含氢硅油、乙烯基硅油、引发剂、抗氧化剂、增韧剂、硬脂酸钙制备成离型剂;将所得离型剂按比例加入固化剂预固化后使用涂布机均匀涂布在粘结力改性剂层上;
(5)将涂布好的基膜经过热固化,光固化制备而成。
优选的,所述步骤(1)中,热风清理改性复合基膜表面的水分和灰尘,温度为60~70℃。
优选的,所述步骤(2)中,电晕处理后改性复合基膜的表面张力为32~40mN/m。
优选的,所述步骤(3)中,粘结力改性剂为丙烯酸、硅烷偶联剂的一种或两种,采用喷涂方法涂布在基材表面,喷涂后置于55~65℃的温度下烘干。
优选的,所述步骤(4)中,所述的固化剂为氮丙啶CX-100,其用量和离型剂的重量比为3~5:100,所述的涂布方法采用线棒涂布方法涂布在粘结力改性剂层。
优选的,所述步骤(5)中的热固化温度为90-110℃,时间10-15s。
优选的,所述的热固化温度为100℃,时间12s。
优选的,所述步骤(5)中的热固化强度为90-110W/cm、剂量为150-350J/cm2、光照射时间10-20s。
优选的,所述的热固化强度为100W/cm、剂量为250J/cm2、光照射时间15s。
本发明的有益效果是:本发明的基膜由PET/PBT薄膜,通过改性复合而成,纳米氮化钛具有较高的熔点、良好的导热性及环境稳定性,可以大大提高 PET/PBT离型膜基膜与离型剂之间的粘结力,避免离型剂与基膜之间的分离;对基膜表面电晕处理,使改性PET/PBT复合离型膜基膜表面产生游离基,提高了正硅酸乙酯涂料抗静电层与基膜的附着力;由正硅酸乙酯涂料构成的抗静电涂层具有良好的导电性,能够把离型膜表面的静电带走,从而达到抗静电的效果,且效果稳定、良好;粘结力改性剂与改性PET/PBT复合离型膜表面的游离基反应,进一步提高了粘结力。热固化和光固化处理进一步增强了改性剂涂层和离型层的界面强度。本发明制备方法制得的改性PET/PBT复合离型膜提高了离型膜的刚度问题,有效的提高了基膜和离型剂之间的粘结力。
具体实施方式
下面通过具体实施例对本发明做进一步的说明,但实施例并不限制本发明的保护范围。
实施例1
一种高粘结改性PET/PBT复合离型膜的制备方法包括以下步骤:
(1)称取PET 50份、PBT 25份、端氢硅油10份、纳米氮化钛5份、硬脂酸钙1份、石蜡5份混合改性,熔融挤出制造改性PET/PBT复合基膜薄片,所述的基膜薄片厚度为20微米;
(2)60℃的热风清理改性PET/PBT复合基膜薄片表面水分和灰尘、电晕处理基膜表面使其表面张力为32mN/m,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层丙烯酸、55℃下烘干;
(4)称取导电聚合物树脂25份、甲基含氢硅油5份、乙烯基硅油40份、引发剂1份、抗氧化剂1份、增韧剂4份、硬脂酸钙1份制备成离型剂;将所得离型剂按100:3比例加入固化剂氮丙啶CX-100预固化后使用涂布机采用线棒涂布方法均匀涂布在粘结力改性剂丙烯酸层上,所述离型层厚度为5纳米;
(5)将涂布好的基膜经过热固化、光固化,热固化温度为90℃,时间15s;热固化强度为90W/cm、剂量为150J/cm2、光照射时间20s制备而成所述的高粘结力的改性PET/PBT复合离型膜,所述的抗静电层厚度为5纳米。
实施例2
一种高粘结改性PET/PBT复合离型膜的制备方法包括以下步骤:
(1)称取PET 70份、PBT 45份、端氢硅油20份、纳米氮化钛7份、硬脂酸钙2份、石蜡15份混合改性,熔融挤出制造改性PET/PBT复合基膜薄片,所述的基膜薄片厚度为100微米;
(2)70℃的热风清理改性PET/PBT复合基膜薄片表面水分和灰尘、电晕处理基膜表面使其表面张力为40mN/m,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层丙烯酸、65℃下烘干;
(4)称取导电聚合物树脂45份、甲基含氢硅油15份、乙烯基硅油60份、引发剂2份、抗氧化剂3份、增韧剂8份、硬脂酸钙2份制备成离型剂;将所得离型剂按100:5比例加入固化剂氮丙啶CX-100预固化后使用涂布机采用线棒涂布方法均匀涂布在粘结力改性剂丙烯酸层上,所述的离型层厚度为30纳米;
(5)将涂布好的基膜经过热固化、光固化,热固化温度为110℃,时间10s;热固化强度为110W/cm、剂量为350J/cm2、光照射时间10s制备而成所述的高粘结力的改性PET/PBT复合离型膜,所述的抗静电层厚度为20纳米。
实施例3
一种高粘结改性PET/PBT复合离型膜的制备方法包括以下步骤:
(1)称取PET 55份、PBT 30份、端氢硅油12份、纳米氮化钛6份、硬脂酸钙2份、石蜡8份混合改性,熔融挤出制造改性PET/PBT复合基膜薄片,所述的基膜薄片厚度为40微米;
(2)60℃的热风清理改性PET/PBT复合基膜薄片表面水分和灰尘、电晕处理基膜表面使其表面张力为34mN/m,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层丙烯酸、55℃下烘干;
(4)称取导电聚合物树脂30份、甲基含氢硅油8份、乙烯基硅油45份、引发剂2份、抗氧化剂1份、增韧剂5份、硬脂酸钙2份制备成离型剂;将所得离型剂按100:3比例加入固化剂氮丙啶CX-100预固化后使用涂布机采用线棒涂布方法均匀涂布在粘结力改性剂丙烯酸层上,所述的离型层厚度为10纳米;
(5)将涂布好的基膜经过热固化、光固化,热固化温度为95℃,时间14s;热固化强度为95W/cm、剂量为200J/cm2、光照射时间18s制备而成所述的高粘结力的改性PET/PBT复合离型膜,所述的抗静电层厚度为8纳米。
实施例4
一种高粘结改性PET/PBT复合离型膜的制备方法包括以下步骤:
(1)称取PET 65份、PBT 40份、端氢硅油18份、纳米氮化钛7份、硬脂酸钙3份、石蜡12份混合改性,熔融挤出制造改性PET/PBT复合基膜薄片,所述的基膜薄片厚度为80微米;
(2)60℃的热风清理改性PET/PBT复合基膜薄片表面水分和灰尘、电晕处理基膜表面使其表面张力为38mN/m,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层丙烯酸、65℃下烘干;
(4)称取导电聚合物树脂40份、甲基含氢硅油12份、乙烯基硅油55份、引发剂3份、抗氧化剂2份、增韧剂7份、硬脂酸钙3份制备成离型剂;将所得离型剂按100:5比例加入固化剂氮丙啶CX-100预固化后使用涂布机采用线棒涂布方法均匀涂布在粘结力改性剂丙烯酸层上,所述的离型层厚度为20纳米;
(5)将涂布好的基膜经过热固化、光固化,热固化温度为105℃,时间11s;热固化强度为105W/cm、剂量为300J/cm2、光照射时间12s制备而成所述的高粘结力的改性PET/PBT复合离型膜,所述的抗静电层厚度为16纳米。
实施例5
一种高粘结改性PET/PBT复合离型膜的制备方法包括以下步骤:
(1)称取PET 60份、PBT 35份、端氢硅油15份、纳米氮化钛6份、硬脂酸钙2份、石蜡10份混合改性,熔融挤出制造改性PET/PBT复合基膜薄片,所述的基膜薄片厚度为60微米;
(2)60℃的热风清理改性PET/PBT复合基膜薄片表面水分和灰尘、电晕处理基膜表面使其表面张力为36mN/m,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层丙烯酸、60℃下烘干;
(4)称取导电聚合物树脂35份、甲基含氢硅油10份、乙烯基硅油50份、引发剂2份、抗氧化剂2份、增韧剂6份、硬脂酸钙2份制备成离型剂;将所得离型剂按100:4比例加入固化剂氮丙啶CX-100预固化后使用涂布机采用线棒涂布方法均匀涂布在粘结力改性剂丙烯酸层上,所述的离型层厚度为25纳米;
(5)将涂布好的基膜经过热固化、光固化,热固化温度为100℃,时间12s;热固化强度为100W/cm、剂量为250J/cm2、光照射时间15s制备而成所述的高粘结力的改性PET/PBT复合离型膜,所述的抗静电层厚度为15纳米。
需要说明的是,以上实施例仅用以说明本发明的技术方案而非限制。尽管参照较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的范围,其均应涵盖在本发明的权利要求范围中。

Claims (9)

1.一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,包括以下步骤:
(1)称取配方重量份的PET、PBT、端氢硅油、纳米氮化钛、硬脂酸钙、石蜡混合改性,熔融挤出制造改性PET/PBT复合基膜薄片;
(2)热风清理改性PET/PBT复合基膜薄片表面、电晕处理基膜表面,将正硅酸乙酯涂料均匀涂布在基膜的一面;
(3)涂覆粘结力改性剂层、烘干;
(4)称取配方量的导电聚合物树脂、甲基含氢硅油、乙烯基硅油、引发剂、抗氧化剂、增韧剂、硬脂酸钙制备成离型剂;将所得离型剂按比例加入固化剂预固化后使用涂布机均匀涂布在粘结力改性剂层上;
(5)将涂布好的基膜经过热固化,光固化制备而成。
2.如权利要求1所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述步骤(1)中,热风清理改性复合基膜表面的水分和灰尘,所述热风温度为60~70℃。
3.如权利要求1所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述步骤(2)中,电晕处理后改性复合基膜的表面张力为32~40mN/m。
4.如权利要求1所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述步骤(3)中,粘结力改性剂为丙烯酸、硅烷偶联剂的一种或两种,采用喷涂方法涂布在基材表面,喷涂后置于55~65℃的温度下烘干。
5.如权利要求1所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述步骤(4)中,所述的固化剂为氮丙啶CX-100,其用量和离型剂的重量比为3~5:100,所述的涂布方法采用线棒涂布方法涂布在粘结力改性剂层。
6.如权利要求1所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述步骤(5)中的热固化温度为90-110℃,时间10-15s。
7.如权利要求6所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述的热固化温度为100℃,时间12s。
8.如权利要求1所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述步骤(5)中的热固化强度为90-110W/cm、剂量为150-350J/cm2、光照射时间10-20s。
9.如权利要求8所述的一种高粘结改性PET/PBT复合离型膜的制备方法,其特征在于,所述的热固化强度为100W/cm、剂量为250J/cm2、光照射时间15s。
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