CN110126500A - 一种可直接喷绘打印双向拉伸聚酯薄膜及其制备方法 - Google Patents

一种可直接喷绘打印双向拉伸聚酯薄膜及其制备方法 Download PDF

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CN110126500A
CN110126500A CN201910428681.4A CN201910428681A CN110126500A CN 110126500 A CN110126500 A CN 110126500A CN 201910428681 A CN201910428681 A CN 201910428681A CN 110126500 A CN110126500 A CN 110126500A
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王利鹏
白永平
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Wuxi Fengpeng New Material Technology Co Ltd
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Abstract

本发明公开了一种可直接喷绘打印双向拉伸聚酯薄膜及其制备方法。该聚酯薄膜包括承印层膜和基层膜,该制备方法为先制备承印层膜聚酯原料,再对制备的承印层膜聚酯原料和基层膜聚酯原料干燥处理后进行2层共挤出成铸片,经纵向拉伸、横向拉伸和牵引收卷,最终制得可直接喷绘打印双向拉伸聚酯薄膜。本发明所制得的可直接喷绘打印双向拉伸聚酯薄膜无需涂层,可直接作为喷绘打印耗材,还具有优异的力学性能和吸墨性,使用寿命长,成本低,可以大量代替目前常用的喷绘耗材。

Description

一种可直接喷绘打印双向拉伸聚酯薄膜及其制备方法
技术领域
本发明涉及聚酯薄膜领域,特别是涉及一种可直接喷绘打印聚酯薄膜及其制备方法。
背景技术
喷绘耗材是一种用量非常巨大的产品。高速公路广告、城市宣传大幅图画、灯箱装饰和室内外装饰图画等均为喷绘耗材的下游市场。目前这些喷绘耗材主要分为两种,分别是软质PVC、承印涂层/BOPP或 BOPET。BOPET(双向拉伸聚对苯二甲酸乙二醇酯)薄膜是一种综合性能优异的聚合物薄膜,尤其是优异的光学透明性和力学强度。但是因为BOPET分子结构刚性大且分子排列紧密,导致BOPET不具有吸墨性能,必须与承印涂层结合才能实现打画。
专利CN201810513561.X报道了一种高吸墨性聚酯合成纸的制备方法,该聚酯通过流延法成膜,具有很高的吸墨性。然而该合成纸机械性能方面仍不及承印涂层/BOPET喷绘耗材,无法满足长寿命的使用需求。
发明内容
为解决现有技术中存在的问题,本发明提供一种可直接喷绘打印双向拉伸聚酯薄膜及其制备方法。
本发明的可直接喷绘打印双向拉伸聚酯薄膜包括基层膜和承印层膜;
所述承印层膜由以下重量份数的原料组成:
所述基层膜的原料为PET切片。
其中,所述基层膜和承印层膜的质量配比为1.5:8。
此外,所述改性二元醇为新戊二醇、丁二醇、甲基丙二醇和1,6己二醇中的一种或两种。
此外,所述改性齐聚物为聚乙二醇、聚丙二醇和聚丁二醇中的一种或两种。
此外,所述改性齐聚物的分子量为500-2000。
此外,所述催化剂为锑系、锗系、钛系或锡系的催化剂。
此外,所述催化剂为乙二醇锑、二氧化锗、二月桂酸二丁基锡和钛酸四丁酯中的一种或几种。
此外,所述稳定剂为磷酸、亚磷酸、次亚磷酸、焦磷酸、磷酸铵、磷酸三甲酯、磷酸二甲酯、磷酸三苯酯、磷酸二苯酯、亚磷酸三苯酯、亚磷酸二苯酯和亚磷酸铵中的一种。
本发明还提供一种如上述的可直接喷绘打印双向拉伸聚酯薄膜的制备方法,包括以下步骤:
(1)制备承印层膜聚酯原料:将承印层膜的原料按照配比称量,液体和液体混合,固体和固体混合,通过酯化和缩聚制得承印层膜聚酯原料,切片;
(2)干燥处理:按比例称取上述步骤(1)中制得的承印层膜聚酯原料切片和基层膜聚酯原料切片进行干燥处理,第一次结晶温度为 90-130℃,结晶15小时,第二次的结晶温度为150-160℃,干燥温度为 170-180℃,干燥时间大于4小时;
(3)2层共挤出:将步骤(2)中进行干燥处理过的承印层膜聚酯原料切片放于主挤出机挤出承印层膜,基层膜聚酯原料切片放于另外一台辅助挤出机挤出基层膜,物料的挤出温度比聚酯熔点高5-20℃;
(4)铸片:步骤(3)中的2层聚酯切片在挤出机中经熔融过滤后进入模头被挤出,成型铸片,模头温度比聚酯熔点高20℃,冷压辊温度为25℃;
(5)纵向拉伸:铸片之后,进入纵向拉伸机,纵向拉伸温度为50-80℃,拉伸倍数为2-3.5倍;
(6)横向拉伸:纵向拉伸后进入横向拉伸机拉伸和热定型,热定型温度比聚酯切片熔点低15℃;
(7)牵引收卷:热定型完毕后,牵引收卷,制得一种可直接喷绘打印双向拉伸聚酯薄膜。
本发明关于可直接喷绘打印双向拉伸聚酯薄膜及其制备方法。本发明所制得的可直接喷绘打印双向拉伸聚酯薄膜无需涂层,可直接作为喷绘打印耗材,还具有优异的力学性能和吸墨性,使用寿命长,成本低,可以大量代替目前常用的喷绘耗材。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明的一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
实施例1
(1)制备承印层膜聚酯原料:称取2000g对苯二甲酸、650g乙二醇、50g甲基丙二醇、900g聚丙二醇、0.2g乙二醇锑和0.1g磷酸三甲酯,液体和液体混合,固体和固体混合,通过酯化和缩聚制得承印层膜薄膜聚酯原料,切片;
(2)干燥处理:称取1.5公斤上述步骤(1)中制得的承印层膜聚酯原料切片和8公斤PET切片进行干燥处理,第一次结晶温度为90℃,结晶15小时,第二次的结晶温度为160℃,干燥温度为180℃,干燥4.5小时;
(3)2层共挤出:将步骤(2)中进行干燥处理过的承印层膜聚酯原料切片放于主挤出机挤出承印层膜,PET切片放于另外一台辅助挤出机挤出基层膜,物料的挤出温度比聚酯熔点高5℃;
(4)铸片:步骤(3)中的2层聚酯切片在挤出机中经熔融过滤后进入模头被挤出,成型铸片,模头温度比聚酯熔点高20℃,冷压辊温度为25℃;
(5)纵向拉伸:铸片之后,进入纵向拉伸机,纵向拉伸温度为50℃,拉伸倍数为2倍;
(6)横向拉伸:纵向拉伸后进入横向拉伸机拉伸和热定型,热定型温度比聚酯切片熔点低15℃;
(7)牵引收卷:热定型完毕后,牵引收卷,制得一种可直接喷绘打印双向拉伸聚酯薄膜。
实施例2
(1)制备承印层膜聚酯原料:称取2000g对苯二甲酸、900g乙二醇、甲基丙二醇20g、聚丙二醇1200g、0.4g二氧化锗和0.3g磷酸,液体和液体混合,固体和固体混合,通过酯化和缩聚制得承印层膜薄膜聚酯原料,切片;
(2)干燥处理:称取1.5公斤上述步骤(1)中制得的承印层膜聚酯原料切片和8公斤PET切片进行干燥处理,第一次结晶温度为130℃,结晶15小时,第二次的结晶温度为150℃,干燥温度为170℃,干燥10 小时;
(3)2层共挤出:将步骤(2)中进行干燥处理过的承印层膜聚酯原料切片放于主挤出机挤出承印层膜,PET切片放于另外一台辅助挤出机挤出基层膜,物料的挤出温度比聚酯熔点高20℃;
(4)铸片:步骤(3)中的2层聚酯切片在挤出机中经熔融过滤后进入模头被挤出,成型铸片,模头温度比聚酯熔点高20℃,冷压辊温度为25℃;
(5)纵向拉伸:铸片之后,进入纵向拉伸机,纵向拉伸温度为80℃,拉伸倍数为3.5倍;
(6)横向拉伸:纵向拉伸后进入横向拉伸机拉伸和热定型,热定型温度比聚酯切片熔点低15℃;
(7)牵引收卷:热定型完毕后,牵引收卷,制得一种可直接喷绘打印双向拉伸聚酯薄膜。
实施例3
(1)制备承印层膜聚酯原料:称取2000g对苯二甲酸、800g乙二醇、30g丁二醇、500g聚乙二醇、600g聚丁二醇、0.2g二月桂酸二丁基锡、0.1g钛酸四丁酯和0.1g磷酸三苯酯,液体和液体混合,固体和固体混合,通过酯化和缩聚制得承印层膜薄膜聚酯原料,切片;
(2)干燥处理:称取1.5公斤上述步骤(1)中制得的承印层膜聚酯原料切片和8公斤PET切片进行干燥处理,第一次结晶温度为110℃,结晶15小时,第二次的结晶温度为155℃,干燥温度为172℃,干燥时间24小时;
(3)2层共挤出:将步骤(2)中进行干燥处理过的承印层膜聚酯原料切片放于主挤出机挤出承印层膜,PET切片放于另外一台辅助挤出机挤出基层膜,物料的挤出温度比聚酯熔点高10℃;
(4)铸片:步骤(3)中的2层聚酯切片在挤出机中经熔融过滤后进入模头被挤出,成型铸片,模头温度比聚酯熔点高20℃,冷压辊温度为25℃;
(5)纵向拉伸:铸片之后,进入纵向拉伸机,纵向拉伸温度为70℃,拉伸倍数为3倍;
(6)横向拉伸:纵向拉伸后进入横向拉伸机拉伸和热定型,热定型温度比聚酯切片熔点低15℃;
(7)牵引收卷:热定型完毕后,牵引收卷,制得一种可直接喷绘打印双向拉伸聚酯薄膜。
实施例4
(1)制备承印层膜聚酯原料:称取2000g对苯二甲酸、850g乙二醇、30g新戊二醇、10g 1,6己二醇、500g聚丙二醇、400g聚丁二醇、0.2g 钛酸四丁酯和0.2g磷酸三苯酯,液体和液体混合,固体和固体混合,通过酯化和缩聚制得承印层膜薄膜聚酯原料,切片;
(2)干燥处理:称取1.5公斤上述步骤(1)中制得的承印层膜聚酯原料切片和8公斤PET切片进行干燥处理,第一次结晶温度为100℃,结晶15小时,第二次的结晶温度为157℃,干燥温度为175℃,干燥时间48小时;
(3)2层共挤出:将步骤(2)中进行干燥处理过的承印层膜聚酯原料切片放于主挤出机挤出承印层膜,PET切片放于另外一台辅助挤出机挤出基层膜,物料的挤出温度比聚酯熔点高15℃;
(4)铸片:步骤(3)中的2层聚酯切片在挤出机中经熔融过滤后进入模头被挤出,成型铸片,模头温度比聚酯熔点高20℃,冷压辊温度为25℃;
(5)纵向拉伸:铸片之后,进入纵向拉伸机,纵向拉伸温度为60℃,拉伸倍数为2.5倍;
(6)横向拉伸:纵向拉伸后进入横向拉伸机拉伸和热定型,热定型温度比聚酯切片熔点低15℃;
(7)牵引收卷:热定型完毕后,牵引收卷,制得一种可直接喷绘打印双向拉伸聚酯薄膜。
实施例1-4制得的可直接喷绘打印双向拉伸聚酯薄膜测得的性能如下表所示:
本发明关于可直接喷绘打印双向拉伸聚酯薄膜及其制备方法。本发明所制得的聚酯薄膜无需涂层处理即可直接作为喷绘耗材,且该聚酯薄膜力学性能优异,吸墨性好,使用寿命长,成本低,绿色环保,可大量替代目前的通用喷绘耗材。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书内容所作的等效结构或等效流程变换,或直接或间接运用在其它相关的技术领域,均同理包括在本发明专利的保护范围。

Claims (9)

1.一种可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述聚酯薄膜包括基层膜和承印层膜;
所述承印层膜由以下重量份数的原料组成:
所述基层膜的原料为PET切片。
2.根据权利要求1所述的可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述基层膜和承印层膜的质量配比为1.5:8。
3.根据权利要求1所述的可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述改性二元醇为新戊二醇、丁二醇、甲基丙二醇和1,6己二醇中的一种或两种。
4.根据权利要求1所述的可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述改性齐聚物为聚乙二醇、聚丙二醇和聚丁二醇中的一种或两种。
5.根据权利要求4可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述改性齐聚物的分子量为500-2000。
6.根据权利要求1所述的可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述催化剂为锑系、锗系、钛系或锡系的催化剂。
7.根据权利要求6所述的直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述催化剂为乙二醇锑、二氧化锗、二月桂酸二丁基锡和钛酸四丁酯中的一种或几种。
8.根据权利要求1所述的可直接喷绘打印双向拉伸聚酯薄膜,其特征在于,所述稳定剂为磷酸、亚磷酸、次亚磷酸、焦磷酸、磷酸铵、磷酸三甲酯、磷酸二甲酯、磷酸三苯酯、磷酸二苯酯、亚磷酸三苯酯、亚磷酸二苯酯和亚磷酸铵中的一种。
9.根据权利要求1-8任一项所述的可直接喷绘打印双向拉伸聚酯薄膜的制备方法,其特征在于,包括以下步骤:
(1)制备承印层膜聚酯原料:将承印层膜的原料按照配比称量,液体和液体混合,固体和固体混合,通过酯化和缩聚制得承印层膜聚酯原料,切片;
(2)干燥处理:按比例称取上述步骤(1)中制得的承印层膜聚酯原料切片和基层膜聚酯原料切片进行干燥处理,第一次结晶温度为90-130℃,结晶15小时,第二次的结晶温度为150-160℃,干燥温度为170-180℃,干燥时间大于4小时;
(3)2层共挤出:将步骤(2)中进行干燥处理过的承印层膜聚酯原料切片放于主挤出机挤出承印层膜,基层膜聚酯原料切片放于另外一台辅助挤出机挤出基层膜,物料的挤出温度比聚酯熔点高5-20℃;
(4)铸片:步骤(3)中的2层聚酯切片在挤出机中经熔融过滤后进入模头被挤出,成型铸片,模头温度比聚酯熔点高20℃,冷压辊温度为25℃;
(5)纵向拉伸:铸片之后,进入纵向拉伸机,纵向拉伸温度为50-80℃,拉伸倍数为2-3.5倍;
(6)横向拉伸:纵向拉伸后进入横向拉伸机拉伸和热定型,热定型温度比聚酯切片熔点低15℃;
(7)牵引收卷:热定型完毕后,牵引收卷,制得一种可直接喷绘打印双向拉伸聚酯薄膜。
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