CN114179325B - 一种bopet薄膜的生产方法 - Google Patents

一种bopet薄膜的生产方法 Download PDF

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CN114179325B
CN114179325B CN202111471281.5A CN202111471281A CN114179325B CN 114179325 B CN114179325 B CN 114179325B CN 202111471281 A CN202111471281 A CN 202111471281A CN 114179325 B CN114179325 B CN 114179325B
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邵峥
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Abstract

本发明公开了一种高性能BOPET薄膜的生产方法，BOPET薄膜由外表层、中间芯层和内表层组成；外表层由PET、PHB、PA6、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成；中间芯层由PET、PBT、PC、ABS、玻璃纤维、滑石粉、苯乙烯‑甲基丙烯酸甲酯‑甲基丙烯酸缩水甘油酯的共聚物组成；内表层由PET、二氧化钛、氧化锌、PBT、聚环氧乙烷、TPU、纳米二氧化硅、亚磷酸三苯酯组成。由此设计的BOPET薄膜性能更高。

Description

一种BOPET薄膜的生产方法
技术领域
本发明涉及BOPET薄膜技术领域，具体讲是一种BOPET薄膜的生产方法。
背景技术
BOPET薄膜是双向拉伸聚酯薄膜，BOPET薄膜通常具有强度高、刚性好、透明、光泽度高等特点，但它也有在使用方面的缺陷，所以如何研制出一种性能更好的BOPET薄膜即为本领域工作人员所欲研究的方向。
发明内容
鉴于上述现有技术的缺陷，本发明的目的在于：提供一种BOPET薄膜的生产方法。
为解决上述问题，本发明的技术解决方案是：一种BOPET薄膜的生产方法，BOPET薄膜由外表层、中间芯层和内表层组成；
外表层由PET、PHB、PA6、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成；
中间芯层由PET、PBT、PC、ABS、玻璃纤维、滑石粉、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物组成；
内表层由PET、二氧化钛、氧化锌、PBT、聚环氧乙烷、TPU、纳米二氧化硅、亚磷酸三苯酯组成；
生产方法包括以下步骤：
(1)按照外表层、中间芯层和内表层各组分比例分别称取原料；
(2)外表层、中间芯层和内表层原料分别共混，送入各自挤出机进行混炼塑化；
(3)分别将熔融态熔体送入模头，熔体在模头中汇合后通过扁平状的模头口形成熔融态片材；
(4)用气刀将片材贴附于激冷辊上骤冷形成未定型的片材，然后经过水浴冷却后将片材定型形成铸片；
(5)铸片经拉伸后形成薄膜；
(6)薄膜通过红外线检测厚度将对应厚度偏差反馈到模头，通过对应位置螺栓加热功率微动，对薄膜厚度偏差进行修正；
(7)电晕面进行高频高压火花处理；
(8)薄膜用氨气等离子体处理，并在薄膜表面接枝氨基酸；
(9)通过目测的方法对薄膜表面质量进行检测；
(10)将薄膜进行收卷。
进一步地，外表层、中间芯层和内表层的组分按质量比为：外表层20％、中间芯层60％、内表层20％。
进一步地，外表层的组分按质量比为：PET 70％、PHB 20％、PA6 7％、对羟基苯甲酸0.1％、对苯二甲酸0.1％、乙二醇0.1％、LLDPE 2.5％、抗氧剂1010 0.2％。
进一步地，中间芯层的组分按质量比为：PET 60％、PBT 18％、PC 10％、ABS 6％、玻璃纤维2％、滑石粉3％、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物1％。
进一步地，内表层的组分按质量比为：PET 70％、二氧化钛2％、氧化锌2％、PBT16％、聚环氧乙烷2％、TPU 5％、纳米二氧化硅1％、亚磷酸三苯酯2％。
进一步地，外表层由组分一、组分二、组分三组成，组分一由PET、PA6组成，组分二由PET、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成，组分三由PET、PHB组成；
中间芯层由组分四、组分五和组分六组成，组分四由PET、PBT、PC组成，组分五由PET、PC、ABS、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物组成，组分六由PET、PBT、玻璃纤维、滑石粉组成；
内表层由组分七、组分八和组分九组成，组分七由PET、TPU、纳米二氧化硅组成，组分八由PET、二氧化钛、氧化锌组成，组分九由PET、PBT、聚环氧乙烷、亚磷酸三苯酯组成。
进一步地，步骤(2)中，外表层、中间芯层和内表层原料分别根据各组分进行熔融混配，将熔融状态的组分一、组分二、组分三混合，将组分四、组分五和组分六混合，将组分七、组分八和组分九混合。
进一步地，步骤(8)具体为：
(81)薄膜在等离子处理前用乙醇浸泡20h后用蒸馏水超声波清洗10min；
(82)将步骤(81)处理后的薄膜置入等离子体处理仪器中，用氨气等离子体处理后，用40℃戊二醛水溶液浸泡50min后取出，用蒸馏水冲洗残留的戊二醛；
(83)将步骤(82)处理后的薄膜置入60℃饱和氨酯溶液反应5h后取出晾干；
(84)晾干后对薄膜进行接触角测量。
进一步地，步骤(9)具体为：测试人员眼睛与薄膜呈45度的角度，与薄膜距离为250-350mm进行观察，在光照强度为600-800LUX的环境下，每一米长度的薄膜取1个检测点，每个检测点观察时间为3-5秒。
本发明的有益效果是：
外表层不但通过PET、PA6共混改性，可提高PET结晶速度，提高共混物的稳定性，外表层还通过PET、LLDPE共混改性，对羟基苯甲酸、对苯二甲酸、乙二醇、抗氧剂1010的加入使得混合物能够获得较好的低温冲击强度和较好的结晶速度，并提高热处理后的冲击强度，外表层还通过PET、PHB共混改性，起到增塑作用；
中间芯层不但通过PET、PBT、PC共混改性，可提高薄膜的缺口冲击强度，还通过PET、PC、ABS共混改性，苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物作为界面改善剂，可以提高冲击强度，还通过PET、PBT、玻璃纤维、滑石粉共混改性，可提高薄膜热变形温度和冲击强度；
内表层不但通过PET、TPU、纳米二氧化硅共混改性，可以起到增韧作用，还通过PET、二氧化钛、氧化锌共混改性，提高混合物流变性，提高对温度的感应，还通过PET、BT、聚环氧乙烷、亚磷酸三苯酯共混改性，起到增韧作用，可提高薄膜的冲击强度；
薄膜用氨气等离子体处理，并在薄膜表面接枝氨基酸，可提高薄膜的亲水性；
通过目测的方法对薄膜表面质量进行检测，可以在不用检测设备的设备下进行检测，节省检测设备成本。
具体实施方式
为比较直观、完整地理解本发明的技术方案，现进行非限制性的特征说明如下：
一种BOPET薄膜的生产方法，BOPET薄膜由外表层、中间芯层和内表层组成；
外表层由PET、PHB、PA6、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成；
中间芯层由PET、PBT、PC、ABS、玻璃纤维、滑石粉、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物组成；
内表层由PET、二氧化钛、氧化锌、PBT、聚环氧乙烷、TPU、纳米二氧化硅、亚磷酸三苯酯组成；
生产方法包括以下步骤：
(1)按照外表层、中间芯层和内表层各组分比例分别称取原料；
(2)外表层、中间芯层和内表层原料分别共混，送入各自挤出机进行混炼塑化；
(3)分别将熔融态熔体送入模头，熔体在模头中汇合后通过扁平状的模头口形成熔融态片材；
(4)用气刀将片材贴附于激冷辊上骤冷形成未定型的片材，然后经过水浴冷却后将片材定型形成铸片；
(5)铸片经拉伸后形成薄膜；
(6)薄膜通过红外线检测厚度将对应厚度偏差反馈到模头，通过对应位置螺栓加热功率微动，对薄膜厚度偏差进行修正；
(7)电晕面进行高频高压火花处理，诱发其表面化学键断裂，改善薄膜的表面润湿性和极性；
(8)薄膜用氨气等离子体处理，并在薄膜表面接枝氨基酸；
(9)通过目测的方法对薄膜表面质量进行检测；
(10)将薄膜进行收卷。
进一步地，外表层、中间芯层和内表层的组分按质量比为：外表层20％、中间芯层60％、内表层20％。
外表层的组分按质量比为：PET 70％、PHB 20％、PA6 7％、对羟基苯甲酸0.1％、对苯二甲酸0.1％、乙二醇0.1％、LLDPE 2.5％、抗氧剂1010 0.2％。
中间芯层的组分按质量比为：PET 60％、PBT 18％、PC 10％、ABS 6％、玻璃纤维2％、滑石粉3％、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物1％。
内表层的组分按质量比为：PET 70％、二氧化钛2％、氧化锌2％、PBT 16％、聚环氧乙烷2％、TPU 5％、纳米二氧化硅1％、亚磷酸三苯酯2％。
外表层由组分一、组分二、组分三组成，组分一由PET、PA6组成，组分二由PET、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成，组分三由PET、PHB组成，组分一、组分二、组分三中的PET质量比为3：2：2。
中间芯层由组分四、组分五和组分六组成，组分四由PET、PBT、PC组成，组分五由PET、PC、ABS、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物组成，组分六由PET、PBT、玻璃纤维、滑石粉组成，组分四、组分五和组分六中的PET质量比为4：2：1；
内表层由组分七、组分八和组分九组成，组分七由PET、TPU、纳米二氧化硅组成，组分八由PET、二氧化钛、氧化锌组成，组分九由PET、PBT、聚环氧乙烷、亚磷酸三苯酯组成，组分七、组分八和组分九中的PET质量比为5：1：1。
步骤(2)中，外表层、中间芯层和内表层原料分别根据各组分进行熔融混配，将熔融状态的组分一、组分二、组分三混合，将组分四、组分五和组分六混合，将组分七、组分八和组分九混合。
步骤(8)具体为：
(81)薄膜在等离子处理前用乙醇浸泡20h后用蒸馏水超声波清洗10min；
(82)将步骤(81)处理后的薄膜置入等离子体处理仪器中，用氨气等离子体处理后，用40℃戊二醛水溶液浸泡50min后取出，用蒸馏水冲洗残留的戊二醛；
(83)将步骤(82)处理后的薄膜置入60℃饱和氨酯溶液反应5h后取出晾干；
(84)晾干后对薄膜进行接触角测量。
步骤(9)具体为：测试人员眼睛与薄膜呈45度的角度，与薄膜距离为300mm进行观察，在光照强度为700LUX的环境下，每一米长度的薄膜取1个检测点，每个检测点观察时间为4秒，可以在不用检测设备的设备下进行人工检测，节省检测设备成本。
本发明的外表层不但通过PET、PA6共混改性，可提高PET结晶速度，提高共混物的稳定性，外表层还通过PET、LLDPE共混改性，对羟基苯甲酸、对苯二甲酸、乙二醇、抗氧剂1010的加入使得混合物能够获得较好的低温冲击强度和较好的结晶速度，并提高热处理后的冲击强度，外表层还通过PET、PHB共混改性，起到增塑作用；
中间芯层不但通过PET、PBT、PC共混改性，可提高薄膜的缺口冲击强度，还通过PET、PC、ABS共混改性，苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物作为界面改善剂，可以提高冲击强度，还通过PET、PBT、玻璃纤维、滑石粉共混改性，可提高薄膜热变形温度和冲击强度；
内表层不但通过PET、TPU、纳米二氧化硅共混改性，可以起到增韧作用，还通过PET、二氧化钛、氧化锌共混改性，提高混合物流变性，提高对温度的感应，还通过PET、BT、聚环氧乙烷、亚磷酸三苯酯共混改性，起到增韧作用，可提高薄膜的冲击强度；
薄膜用氨气等离子体处理，并在薄膜表面接枝氨基酸，可提高薄膜的亲水性。

Claims (6)

1.一种BOPET薄膜的生产方法，其特征在于：BOPET薄膜由外表层、中间芯层和内表层组成；
外表层由PET、PHB、PA6、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成；
中间芯层由PET、PBT、PC、ABS、玻璃纤维、滑石粉、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物组成；
内表层由PET、二氧化钛、氧化锌、PBT、聚环氧乙烷、TPU、纳米二氧化硅、亚磷酸三苯酯组成；
生产方法包括以下步骤：
(1)按照外表层、中间芯层和内表层各组分比例分别称取原料；
(2)外表层、中间芯层和内表层原料分别共混，送入各自挤出机进行混炼塑化；
(3)分别将熔融态熔体送入模头，熔体在模头中汇合后通过扁平状的模头口形成熔融态片材；
(4)用气刀将片材贴附于激冷辊上骤冷形成未定型的片材，然后经过水浴冷却后将片材定型形成铸片；
(5)铸片经拉伸后形成薄膜；
(6)薄膜通过红外线检测厚度将对应厚度偏差反馈到模头，通过对应位置螺栓加热功率微动，对薄膜厚度偏差进行修正；
(7)电晕面进行高频高压火花处理；
(8)薄膜用氨气等离子体处理，并在薄膜表面接枝氨基酸；
(9)通过目测的方法对薄膜表面质量进行检测；
(10)将薄膜进行收卷；
外表层的组分按质量比为：PET 70％、PHB 20％、PA6 7％、对羟基苯甲酸0.1％、对苯二甲酸0.1％、乙二醇0.1％、LLDPE 2.5％、抗氧剂1010 0.2％；
中间芯层的组分按质量比为：PET 60％、PBT 18％、PC 10％、ABS 6％、玻璃纤维2％、滑石粉3％、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物1％；
内表层的组分按质量比为：PET 70％、二氧化钛2％、氧化锌2％、PBT 16％、聚环氧乙烷2％、TPU 5％、纳米二氧化硅1％、亚磷酸三苯酯2％。
2.根据权利要求1所述的一种BOPET薄膜的生产方法，其特征在于：外表层、中间芯层和内表层的组分按质量比为：外表层20％、中间芯层60％、内表层20％。
3.根据权利要求1所述的一种BOPET薄膜的生产方法，其特征在于：外表层由组分一、组分二、组分三组成，组分一由PET、PA6组成，组分二由PET、对羟基苯甲酸、对苯二甲酸、乙二醇、LLDPE、抗氧剂1010组成，组分三由PET、PHB组成；
中间芯层由组分四、组分五和组分六组成，组分四由PET、PBT、PC组成，组分五由PET、PC、ABS、苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯的共聚物组成，组分六由PET、PBT、玻璃纤维、滑石粉组成；
内表层由组分七、组分八和组分九组成，组分七由PET、TPU、纳米二氧化硅组成，组分八由PET、二氧化钛、氧化锌组成，组分九由PET、PBT、聚环氧乙烷、亚磷酸三苯酯组成。
4.根据权利要求3所述的一种BOPET薄膜的生产方法，其特征在于：步骤(2)中，外表层、中间芯层和内表层原料分别根据各组分进行熔融混配，将熔融状态的组分一、组分二、组分三混合，将组分四、组分五和组分六混合，将组分七、组分八和组分九混合。
5.根据权利要求1所述的一种BOPET薄膜的生产方法，其特征在于：步骤(8)具体为：
(81)薄膜在等离子处理前用乙醇浸泡20h后用蒸馏水超声波清洗10min；
(82)将步骤(81)处理后的薄膜置入等离子体处理仪器中，用氨气等离子体处理后，用40℃戊二醛水溶液浸泡50min后取出，用蒸馏水冲洗残留的戊二醛；
(83)将步骤(82)处理后的薄膜置入60℃饱和氨酯溶液反应5h后取出晾干；
(84)晾干后对薄膜进行接触角测量。
6.根据权利要求1所述的一种BOPET薄膜的生产方法，其特征在于：步骤(9)具体为：测试人员眼睛与薄膜呈45度的角度，与薄膜距离为250-350mm进行观察，在光照强度为600-800LUX的环境下，每一米长度的薄膜取1个检测点，每个检测点观察时间为3-5秒。
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CN113415057A (zh) * 2021-06-22 2021-09-21 安徽国风塑业股份有限公司 一种采光瓦用bopet薄膜及其制备方法

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