CN114193888A - 一种可提高冲击强度的bopet薄膜的生产方法 - Google Patents
一种可提高冲击强度的bopet薄膜的生产方法 Download PDFInfo
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- 238000000034 method Methods 0.000 claims abstract description 13
- 239000004698 Polyethylene Substances 0.000 claims abstract description 12
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 12
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 9
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- 238000004140 cleaning Methods 0.000 claims description 3
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- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- BHTJEPVNHUUIPV-UHFFFAOYSA-N pentanedial;hydrate Chemical compound O.O=CCCCC=O BHTJEPVNHUUIPV-UHFFFAOYSA-N 0.000 claims description 3
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- 150000003673 urethanes Chemical class 0.000 claims description 3
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- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
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Abstract
本发明公开了一种可提高冲击强度的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、ECDP、PEG、二氧化硅、蒙脱土组成;中间芯层由PET、ABS、PS‑g‑GMA、PEN、DBS类聚烯烃成核剂组成;内表层由PET、HDPE、PP、SEBS‑g‑MAH、EPR、马来酸酐改性聚乙烯组成。由此设计的BOPET薄膜大大提高了冲击强度,且综合性能较好。
Description
技术领域
本发明涉及BOPET薄膜技术领域,具体讲是一种可提高冲击强度的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:提供一种高挺度包装薄膜。
为解决上述问题,本发明的技术解决方案是:一种可提高冲击强度的BOPE T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、ECDP、PEG、二氧化硅、蒙脱土组成;
中间芯层由PET、ABS、PS-g-GMA、PEN、DBS类聚烯烃成核剂组成;
内表层由PET、HDPE、PP、SEBS-g-MAH、EPR、马来酸酐改性聚乙烯组成;
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 73%、ECDP20%、PEG 3%、二氧化硅2%、蒙脱土2%。
进一步地,中间芯层的组分按质量比为:PET 80%、ABS 12%、PS-g-GMA 2%、PEN5%、DBS 1%。
进一步地,内表层的组分按质量比为:PET 75%、HDPE 5%、PP 5%、SEBS-g -MAH2%、EPR 12%、马来酸酐改性聚乙烯1%。
进一步地,中间芯层由组分一、组分二组成,组分一由PET、ABS、PS-g -GMA组成,组分二由PET、PEN、DBS类聚烯烃成核剂组成;
内表层由组分三、组分四组成,组分三由PET、HDPE、PP、SEBS-g-MAH组成,组份二由PET、EPR、马来酸酐改性聚乙烯组成。
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、组分二混合,将组分三、组分四混合。
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:
外表层通过PET、ECDP、PEG共混改性,PEG的加入能提高薄膜的吸湿性和抗静电性能,ECDP中含有聚醚连段,使PEG在PET中分散地更加均匀,二氧化硅、蒙脱土作为无机物进行添加,可加快结晶速率,改善薄膜综合性能;
中间芯层不但通过PET、ABS、PS-g-GMA共混改性,可提高缺口冲击强度和断裂伸长率,PS-g-GMA的加入改善了PET、ABS的两项界面结合力,还通过PET、 PEN、DBS类聚烯烃成核剂共混改性,可提高薄膜的阻透性能和热稳定性;
内表层不但通过PET、HDPE、PP、SEBS-g-MAH共混改性,改善了薄膜冲击强度,还通过PET、EPR、马来酸酐改性聚乙烯共混改性,进一步提高了冲击强度;
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:
一种可提高冲击强度的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、ECDP、PEG、二氧化硅、蒙脱土组成;
中间芯层由PET、ABS、PS-g-GMA、PEN、DBS类聚烯烃成核剂组成;
内表层由PET、HDPE、PP、SEBS-g-MAH、EPR、马来酸酐改性聚乙烯组成;
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、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 73%、ECDP20%、PEG 3%、二氧化硅2%、蒙脱土2%。
中间芯层的组分按质量比为:PET 80%、ABS 12%、PS-g-GMA 2%、PEN 5%、 DBS1%。
内表层的组分按质量比为:PET 75%、HDPE 5%、PP 5%、SEBS-g-MAH 2%、E PR12%、马来酸酐改性聚乙烯1%。
中间芯层由组分一、组分二组成,组分一由PET、ABS、PS-g-GMA组成,组分二由PET、PEN、DBS类聚烯烃成核剂组成,组分一、组分二中的PET质量比为1:1。
内表层由组分三、组分四组成,组分三由PET、HDPE、PP、SEBS-g-MAH组成,组份二由PET、EPR、马来酸酐改性聚乙烯组成,组分三、组分四中的PET 质量比为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、组分二混合,将组分三、组分四混合。
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30 0mm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。
本发明外表层通过PET、ECDP、PEG共混改性,PEG的加入能提高薄膜的吸湿性和抗静电性能,ECDP中含有聚醚连段,使PEG在PET中分散地更加均匀,二氧化硅、蒙脱土作为无机物进行添加,可加快结晶速率,改善薄膜综合性能;
中间芯层不但通过PET、ABS、PS-g-GMA共混改性,可提高缺口冲击强度和断裂伸长率,PS-g-GMA的加入改善了PET、ABS的两项界面结合力,还通过PET、 PEN、DBS类聚烯烃成核剂共混改性,可提高薄膜的阻透性能和热稳定性;
内表层不但通过PET、HDPE、PP、SEBS-g-MAH共混改性,改善了薄膜冲击强度,还通过PET、EPR、马来酸酐改性聚乙烯共混改性,进一步提高了冲击强度;
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 (9)
1.一种可提高冲击强度的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、ECDP、PEG、二氧化硅、蒙脱土组成;
中间芯层由PET、ABS、PS-g-GMA、PEN、DBS类聚烯烃成核剂组成;
内表层由PET、HDPE、PP、SEBS-g-MAH、EPR、马来酸酐改性聚乙烯组成;
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。
2.根据权利要求1所述的一种可提高冲击强度的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所述的一种可提高冲击强度的BOPET薄膜的生产方法,其特征在于:外表层的组分按质量比为:PET 73%、ECDP20%、PEG 3%、二氧化硅2%、蒙脱土2%。
4.根据权利要求1所述的一种可提高冲击强度的BOPET薄膜的生产方法,其特征在于:中间芯层的组分按质量比为:PET 80%、ABS 12%、PS-g-GMA 2%、PEN 5%、DBS 1%。
5.根据权利要求1所述的一种可提高冲击强度的BOPET薄膜的生产方法,其特征在于:内表层的组分按质量比为:PET 75%、HDPE 5%、PP 5%、SEBS-g-MAH 2%、EPR 12%、马来酸酐改性聚乙烯1%。
6.根据权利要求1所述的一种可提高冲击强度的BOPET薄膜的生产方法,其特征在于:
中间芯层由组分一、组分二组成,组分一由PET、ABS、PS-g-GMA组成,组分二由PET、PEN、DBS类聚烯烃成核剂组成;
内表层由组分三、组分四组成,组分三由PET、HDPE、PP、SEBS-g-MAH组成,组份二由PET、EPR、马来酸酐改性聚乙烯组成。
7.根据权利要求6所述的一种可提高冲击强度的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、组分二混合,将组分三、组分四混合。
8.根据权利要求1所述的一种可提高冲击强度的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。
9.根据权利要求1所述的一种可提高冲击强度的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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