CN116042114A - 一种全息防伪包装膜及其印刷工艺 - Google Patents

一种全息防伪包装膜及其印刷工艺 Download PDF

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CN116042114A
CN116042114A CN202310041032.5A CN202310041032A CN116042114A CN 116042114 A CN116042114 A CN 116042114A CN 202310041032 A CN202310041032 A CN 202310041032A CN 116042114 A CN116042114 A CN 116042114A
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layer
counterfeiting
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CN116042114B (zh
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刘国锋
彭德辉
郑少颖
武继伟
刘振波
陈明鹏
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Shantou Hengshun Packing Material Co ltd
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Abstract

本发明公开一种全息防伪包装膜及其印刷工艺:该包装膜自上而下依次包括PET膜层、剥离层、着色层、防伪信息层、镀铝层、保护层、粘胶层;所述PET膜层的厚度为8‑15μm,是由PET膜经自修复处理液表面处理而成:将自修复处理液均匀涂覆在PET膜两侧,且单侧涂覆厚度为1.5‑2.5μm,85‑95℃热固化处理1‑2h。本发明首次采用自修复处理液对PET基膜进行表面防护处理,提高PET膜的耐损伤性能、自修复性能和力学强度,因而也进一步提高了其他膜层的稳定性。

Description

一种全息防伪包装膜及其印刷工艺
技术领域
本发明属于多层防伪包装材料领域,具体涉及一种全息防伪包装膜及其印刷工艺。
背景技术
防伪包装膜就是在塑料薄膜上热转印全息防伪图案,对商品的包装物上的图案无影响,但能明显地显示出无法假冒的全息图案和文字,在提高商品外包装观赏性的同时,又达到防伪的特性。但是,现有防伪包装膜都是直接以PET膜为表面基膜,无任何表面防护处理或加工处理,导致表层的PET膜易于刮伤、损伤,并进一步导致其他膜层成分的逸出或损失,破坏包装膜材料。如公告号为CN100369743C 的发明专利,公开具有激光防伪功能的包装复合膜及制作方法;如公告号为CN107513169B的发明专利,公开一种激光全息防伪膜及其印刷工艺;如CN110570749B的发明专利,公开一种光固化型耐热全息防伪膜;上述专利技术均未对基膜进行表面处理,使基膜在受到尖锐物体刮擦时或受重压下造成损伤,进而影响包装膜功能。
发明内容
针对现有技术的不足之处,本发明的目的在于提供一种全息防伪包装膜及其印刷工艺。
本发明的技术方案概述如下:
一种全息防伪包装膜:该包装膜自上而下依次包括PET膜层、剥离层、着色层、防伪信息层、镀铝层、保护层、粘胶层;
所述PET膜层的厚度为8-15μm,是由PET膜经自修复处理液表面处理而成:将自修复处理液均匀涂覆在PET膜两侧,且单侧涂覆厚度为1.5-2.5μm,85-95℃热固化处理1-2h;
所述自修复处理液包括以下质量份原料:聚四氢呋喃二醇40-50份、间苯二甲基异氰酸酯30-45份、脲咪唑二酮5-10份、0.01M氢氧化钠溶液10-15份、二丁基锡二月桂酸酯0.5-1份、氨基硅油10-20份、脂肪酸聚氧乙烯酯0.5-1份、锆酸四丁酯15-20份、异氰酸酯基硅烷偶联剂1-2份、去离子水25-35份。
进一步地,所述自修复处理液的印刷工艺包括以下步骤:
a. 将脲咪唑二酮加入0.01M氢氧化钠溶液中,70-80℃搅拌溶解,得脲咪唑二酮溶液;
b.将聚四氢呋喃二醇升温至105-120℃,在真空条件下,脱水1.5-2h,降温至60-80℃,再于氮气气氛下,与间苯二甲基异氰酸酯、二丁基锡二月桂酸酯混合均匀,再保温搅拌反应3-4h,得聚氨酯预聚体;
c.向聚氨酯预聚体中滴加脲咪唑二酮溶液,滴加完毕后,于70-85℃搅拌反应2-3h,再加入锆酸四丁酯、异氰酸酯基硅烷偶联剂、去离子水,降温至30-40℃,继续搅拌反应1-3h,再加入氨基硅油、脂肪酸聚氧乙烯酯,磁力搅拌均匀后,即得所述自修复处理液。
进一步地,所述剥离层的厚度为0.3-0.5μm,包括以下质量份原料:有机硅树脂40-50份、氟硅改性丙烯酸酯20-30份、三氟丙基甲基环三硅氧烷3-5份。
进一步地,所述着色层的厚度为0.5-1μm,包括以下质量份原料:酚醛环氧树脂15-20份、聚氨酯丙烯酸酯30-40份、1-羟基环己基苯基甲酮0.5-1份、酞青绿G 2-4份。
进一步地,所述防伪信息层中设置有全息防伪图案,且该防伪信息层的厚度为1-3μm,包括以下质量份原料:超支化聚氨酯丙烯酸酯35-45份、环氧丙烯酸酯20-30份、1-羟基环己基苯基甲酮0.5-1份、纳米氧化锆溶胶10-20份、异氰酸酯基硅烷偶联剂1-1.5份。
进一步地,所述异氰酸酯基硅烷偶联剂包括异氰酸酯基丙基三甲氧基硅烷、异氰酸酯基丙基三乙氧基硅烷中的一种或两种。
进一步地,所述镀铝层的0.3-0.4μm。
进一步地,所述保护层的厚度为0.15-0.2μm,包括以下质量份原料:水性聚氨酯乳液50-60份、丙烯酸-衣康酸共聚物15-25份、聚环氧琥珀酸钠5-10份。
进一步地,所述粘胶层的厚度为0.4-0.6μm,该粘胶层由乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物按1:(0.3-0.5)的质量比混合制成,并热压复合在保护层下表面。
本发明还进一步提供上述全息防伪包装膜的印刷工艺,包括以下步骤:
S1:在PET膜层下表面均匀涂布剥离层,并于50-70℃固化成型;
S2:在固化后的剥离层下表面均匀涂布着色层,并于温度为50-60℃、紫外光辐射强度为250-350mJ/cm2的条件下,固化成型;
S3:在固化后的着色层下表面均匀涂布防伪信息层,再于温度为45-55℃、紫外光辐射强度为180-280mJ/cm2的条件下,固化成型,再采用热转印机将全息防伪图案热转印至防伪信息层中,控制热转印温度为180-220℃、热转印压力为0.3-0.5MPa,得到印有全息防伪图案的半成品;
S4:将印有全息防伪图案的半成品置于射频磁控溅射装置内,抽真空至真空度≤1×10-4Pa,以金属铝为靶材,并在氩气气氛下,按150-200W的溅射功率进行射频磁控溅射,在该半成品的防伪信息层下表面形成镀铝层;
S5:在镀铝层下表面均匀涂布保护层,并于60-80℃固化成型;
S6:将粘胶层原料乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物混合均匀后,于155-175℃加热熔融后,均匀涂布在保护层的下表面,再于温度为180℃、压力为5-10MPa条件下,热压成型形成粘胶层,即制得所述全息防伪包装膜。
本发明的有益效果:
1、本发明首次利用脲咪唑二酮、聚四氢呋喃二醇、间苯二甲基异氰酸酯反应合成具有四重氢键的自修复聚氨酯,同时,锆酸四丁酯中的部分Zr2+还与脲咪唑二酮发生配位反应,形成金属配位键,最终制出兼具四重氢键、金属配位键的动态可逆自修复处理液,并对PET膜表面进行涂覆处理形成自修复聚氨酯保护层,当PET膜在受到尖锐物体刮擦或受重压情况下出现损伤或裂纹后,自修复聚氨酯可在热处理条件下发生重组和可逆交换反应,实现对PET膜的高效快速自动修复,且锆酸四丁酯水解产生纳米氧化锆溶胶,在异氰酸酯基硅烷偶联剂作用下,封堵PET膜表面的不规则微孔和缺陷,提高PET膜机械强度、耐磨性和平整度,进而提高全息防伪包装膜的力学性能及各膜层耐久性,延长使用寿命。
2、本发明首次采用自修复处理液对PET基膜进行表面防护处理,提高PET膜的耐损伤性能、自修复性能和力学强度,因而也进一步提高了其他膜层的稳定性。
3、本发明制出的全息防伪包装膜可烫印于不同种类的基材上,能满足高档包装定位与印刷油墨适应性的要求,具有一次性使用、防伪性能强、并能满足环保要求等特点。
附图说明
图1为本发明全息防伪包装膜的结构示意图。
附图标记说明:1为PET膜层、2为剥离层、3为着色层、4为防伪信息层、5为镀铝层、6为保护层、7为粘胶层。
具体实施方式
下面结合实施例对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
请参阅图1,本发明提供一实施例的全息防伪包装膜:该包装膜自上而下依次包括PET膜层1、剥离层2、着色层3、防伪信息层4、镀铝层5、保护层6、粘胶层7;
所述PET膜层1的厚度为8-15μm,是由PET膜经自修复处理液表面处理而成:将自修复处理液均匀涂覆在PET膜两侧,且单侧涂覆厚度为1.5-2.5μm,85-95℃热固化处理1-2h;
所述自修复处理液包括以下质量份原料:聚四氢呋喃二醇40-50份、间苯二甲基异氰酸酯30-45份、脲咪唑二酮5-10份、0.01M氢氧化钠溶液10-15份、二丁基锡二月桂酸酯0.5-1份、氨基硅油10-20份、脂肪酸聚氧乙烯酯0.5-1份、锆酸四丁酯15-20份、异氰酸酯基硅烷偶联剂1-2份、去离子水25-35份;
所述自修复处理液的印刷工艺包括以下步骤:
a. 将脲咪唑二酮加入0.01M氢氧化钠溶液中,70-80℃搅拌溶解,得脲咪唑二酮溶液;
b.将聚四氢呋喃二醇升温至105-120℃,在真空条件下,脱水1.5-2h,降温至60-80℃,再于氮气气氛下,与间苯二甲基异氰酸酯、二丁基锡二月桂酸酯混合均匀,再保温搅拌反应3-4h,得聚氨酯预聚体;
c.向聚氨酯预聚体中滴加脲咪唑二酮溶液,滴加完毕后,于70-85℃搅拌反应2-3h,再加入锆酸四丁酯、异氰酸酯基硅烷偶联剂、去离子水,降温至30-40℃,继续搅拌反应1-3h,再加入氨基硅油、脂肪酸聚氧乙烯酯,磁力搅拌均匀后,即得所述自修复处理液;
所述剥离层2的厚度为0.3-0.5μm,包括以下质量份原料:有机硅树脂40-50份、氟硅改性丙烯酸酯20-30份、三氟丙基甲基环三硅氧烷3-5份;
所述着色层3的厚度为0.5-1μm,包括以下质量份原料:酚醛环氧树脂15-20份、聚氨酯丙烯酸酯30-40份、1-羟基环己基苯基甲酮0.5-1份、酞青绿G2-4份;
所述防伪信息层4中设置有全息防伪图案,且该防伪信息层4的厚度为1-3μm,包括以下质量份原料:超支化聚氨酯丙烯酸酯35-45份、环氧丙烯酸酯20-30份、1-羟基环己基苯基甲酮0.5-1份、纳米氧化锆溶胶10-20份、异氰酸酯基硅烷偶联剂1-1.5份;
所述异氰酸酯基硅烷偶联剂包括异氰酸酯基丙基三甲氧基硅烷、异氰酸酯基丙基三乙氧基硅烷中的一种或两种;
所述镀铝层5的0.3-0.4μm;
所述保护层6的厚度为0.15-0.2μm,包括以下质量份原料:水性聚氨酯乳液50-60份、丙烯酸-衣康酸共聚物15-25份、聚环氧琥珀酸钠5-10份;
所述粘胶层7的厚度为0.4-0.6μm,该粘胶层7由乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物按1:(0.3-0.5)的质量比混合制成,并热压复合在保护层6下表面。
该实施例的全息防伪包装膜的印刷工艺,包括以下步骤:
S1:在PET膜层1下表面均匀涂布剥离层2,并于50-70℃固化成型;
S2:在固化后的剥离层2下表面均匀涂布着色层3,并于温度为50-60℃、紫外光辐射强度为250-350mJ/cm2的条件下,固化成型;
S3:在固化后的着色层3下表面均匀涂布防伪信息层4,再于温度为45-55℃、紫外光辐射强度为180-280mJ/cm2的条件下,固化成型,再采用热转印机将全息防伪图案热转印至防伪信息层4中,控制热转印温度为180-220℃、热转印压力为0.3-0.5MPa,得到印有全息防伪图案的半成品;
S4:将印有全息防伪图案的半成品置于射频磁控溅射装置内,抽真空至真空度≤1×10-4Pa,以金属铝为靶材,并在氩气气氛下,按150-200W的溅射功率进行射频磁控溅射,在该半成品的防伪信息层4下表面形成镀铝层5;
S5:在镀铝层5下表面均匀涂布保护层6,并于60-80℃固化成型;
S6:将粘胶层7原料乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物混合均匀后,于155-175℃加热熔融后,均匀涂布在保护层6的下表面,再于温度为180℃、压力为5-10MPa条件下,热压成型形成粘胶层7,即制得所述全息防伪包装膜。
实施例1
一种全息防伪包装膜的印刷工艺,包括以下步骤:
S1:将自修复处理液均匀涂覆在PET膜两侧,且单侧涂覆厚度为1.5μm,85℃热固化处理1h,得到厚度为8μm的PET膜层1;
所述自修复处理液的印刷工艺为:
a.依次称取以下质量份原料,备用:聚四氢呋喃二醇40份、间苯二甲基异氰酸酯30份、脲咪唑二酮5份、0.01M氢氧化钠溶液10份、二丁基锡二月桂酸酯0.5份、氨基硅油10份、脂肪酸聚氧乙烯酯0.5份、锆酸四丁酯15份、异氰酸酯基丙基三甲氧基硅烷1份、去离子水25份;
b. 将脲咪唑二酮加入0.01M氢氧化钠溶液中,70℃搅拌溶解,得脲咪唑二酮溶液;
c.将聚四氢呋喃二醇升温至105℃,在真空条件下,脱水1.5h,降温至60℃,再于氮气气氛下,与间苯二甲基异氰酸酯、二丁基锡二月桂酸酯混合均匀,再保温搅拌反应3h,得聚氨酯预聚体;
d.向聚氨酯预聚体中滴加脲咪唑二酮溶液,滴加完毕后,于70℃搅拌反应2h,再加入锆酸四丁酯、异氰酸酯基丙基三甲氧基硅烷、去离子水,降温至30℃,继续搅拌反应1h,再加入氨基硅油、脂肪酸聚氧乙烯酯,磁力搅拌均匀后,即得所述自修复处理液;
S2:在PET膜层1下表面均匀涂布剥离层2,并于50℃固化成型;
所述剥离层2的厚度为0.3μm,包括以下质量份原料:有机硅树脂40份、氟硅改性丙烯酸酯20份、三氟丙基甲基环三硅氧烷3份;
S3:在固化后的剥离层2下表面均匀涂布着色层3,并于温度为50℃、紫外光辐射强度为250mJ/cm2的条件下,固化成型;
所述着色层3的厚度为0.5μm,包括以下质量份原料:酚醛环氧树脂15份、聚氨酯丙烯酸酯30份、1-羟基环己基苯基甲酮0.5份、酞青绿G2份;
S4:在固化后的着色层3下表面均匀涂布防伪信息层4,再于温度为45℃、紫外光辐射强度为180mJ/cm2的条件下,固化成型,再采用热转印机将全息防伪图案热转印至防伪信息层4中,控制热转印温度为180℃、热转印压力为0.3MPa,得到印有全息防伪图案的半成品;
所述防伪信息层4的厚度为1μm,包括以下质量份原料:超支化聚氨酯丙烯酸酯35份、环氧丙烯酸酯20份、1-羟基环己基苯基甲酮0.5份、纳米氧化锆溶胶10份、异氰酸酯基丙基三甲氧基硅烷1份;
S5:将印有全息防伪图案的半成品置于射频磁控溅射装置内,抽真空至真空度≤1×10-4Pa,以金属铝为靶材,并在氩气气氛下,按150W的溅射功率进行射频磁控溅射,在该半成品的防伪信息层4下表面形成0.3μm的镀铝层5;
S6:在镀铝层5下表面均匀涂布保护层6,并于60℃固化成型;
所述保护层6的厚度为0.15μm,包括以下质量份原料:水性聚氨酯乳液50份、丙烯酸-衣康酸共聚物15份、聚环氧琥珀酸钠5份;
S7:按1:0.3的质量比将乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物混合均匀后,于155℃加热熔融后,均匀涂布在保护层6的下表面,再于温度为180℃、压力为5MPa条件下,热压成型,形成厚度为0.4μm的粘胶层7,即制得所述全息防伪包装膜。
实施例2
一种全息防伪包装膜的印刷工艺,包括以下步骤:
S1:将自修复处理液均匀涂覆在PET膜两侧,且单侧涂覆厚度为2.5μm,95℃热固化处理2h,得到厚度为15μm的PET膜层1;
所述自修复处理液的印刷工艺为:
a.依次称取以下质量份原料,备用:聚四氢呋喃二醇50份、间苯二甲基异氰酸酯45份、脲咪唑二酮10份、0.01M氢氧化钠溶液15份、二丁基锡二月桂酸酯1份、氨基硅油20份、脂肪酸聚氧乙烯酯1份、锆酸四丁酯20份、异氰酸酯基丙基三乙氧基硅烷2份、去离子水35份;
b. 将脲咪唑二酮加入0.01M氢氧化钠溶液中,80℃搅拌溶解,得脲咪唑二酮溶液;
c.将聚四氢呋喃二醇升温至120℃,在真空条件下,脱水2h,降温至80℃,再于氮气气氛下,与间苯二甲基异氰酸酯、二丁基锡二月桂酸酯混合均匀,再保温搅拌反应4h,得聚氨酯预聚体;
d.向聚氨酯预聚体中滴加脲咪唑二酮溶液,滴加完毕后,于85℃搅拌反应3h,再加入锆酸四丁酯、异氰酸酯基丙基三乙氧基硅烷、去离子水,降温至40℃,继续搅拌反应3h,再加入氨基硅油、脂肪酸聚氧乙烯酯,磁力搅拌均匀后,即得所述自修复处理液;
S2:在PET膜层1下表面均匀涂布剥离层2,并于70℃固化成型;
所述剥离层2的厚度为0.5μm,包括以下质量份原料:有机硅树脂50份、氟硅改性丙烯酸酯30份、三氟丙基甲基环三硅氧烷5份;
S3:在固化后的剥离层2下表面均匀涂布着色层3,并于温度为60℃、紫外光辐射强度为350mJ/cm2的条件下,固化成型;
所述着色层3的厚度为1μm,包括以下质量份原料:酚醛环氧树脂20份、聚氨酯丙烯酸酯40份、1-羟基环己基苯基甲酮1份、酞青绿G4份;
S4:在固化后的着色层3下表面均匀涂布防伪信息层4,再于温度为55℃、紫外光辐射强度为280mJ/cm2的条件下,固化成型,再采用热转印机将全息防伪图案热转印至防伪信息层4中,控制热转印温度为220℃、热转印压力为0.5MPa,得到印有全息防伪图案的半成品;
所述防伪信息层4的厚度为3μm,包括以下质量份原料:超支化聚氨酯丙烯酸酯45份、环氧丙烯酸酯30份、1-羟基环己基苯基甲酮1份、纳米氧化锆溶胶20份、异氰酸酯基丙基三乙氧基硅烷1.5份;
S5:将印有全息防伪图案的半成品置于射频磁控溅射装置内,抽真空至真空度≤1×10-4Pa,以金属铝为靶材,并在氩气气氛下,按200W的溅射功率进行射频磁控溅射,在该半成品的防伪信息层4下表面形成0.4μm的镀铝层5;
S6:在镀铝层5下表面均匀涂布保护层6,并于80℃固化成型;
所述保护层6的厚度为0.2μm,包括以下质量份原料:水性聚氨酯乳液60份、丙烯酸-衣康酸共聚物25份、聚环氧琥珀酸钠10份;
S7:按1:0.5的质量比将乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物混合均匀后,于175℃加热熔融后,均匀涂布在保护层6的下表面,再于温度为180℃、压力为10MPa条件下,热压成型,形成厚度为0.6μm的粘胶层7,即制得所述全息防伪包装膜。
对比例1与实施例1相同:区别在于:在S1自修复处理液制备过程中不添加脲咪唑二酮,该自修复处理液的印刷工艺为:
a.依次称取以下质量份原料,备用:聚四氢呋喃二醇50份、间苯二甲基异氰酸酯45份、0.01M氢氧化钠溶液15份、二丁基锡二月桂酸酯1份、氨基硅油20份、脂肪酸聚氧乙烯酯1份、锆酸四丁酯20份、异氰酸酯基丙基三乙氧基硅烷2份、去离子水35份;
b.将聚四氢呋喃二醇升温至120℃,在真空条件下,脱水2h,降温至80℃,再于氮气气氛下,与间苯二甲基异氰酸酯、二丁基锡二月桂酸酯混合均匀,再保温搅拌反应4h,得聚氨酯预聚体;
c.向聚氨酯预聚体中滴加0.01M氢氧化钠溶液,滴加完毕后,于85℃搅拌反应3h,再加入锆酸四丁酯、异氰酸酯基丙基三乙氧基硅烷、去离子水,降温至40℃,继续搅拌反应3h,再加入氨基硅油、脂肪酸聚氧乙烯酯,磁力搅拌均匀后,即得所述自修复处理液;
对比例2与实施例1相同:区别在于:在S1自修复处理液制备过程中不添加锆酸四丁酯。
按GB/T 21302-2007《包装用复合膜、袋通则》测定实施例1-2及对比例1-2制出的全息防伪包装膜的穿刺强度、抗摆锤冲击能,并按照以下方法测定自修复效率:用30N刮擦组件在实施例1-2及对比例1-2制出的全息防伪包装膜中的PET膜层1上表面进行摩擦,使PET膜层1的上表面全部刮伤、刮花,以PET膜层1的上表面面积作为初始划痕损伤面积S1,再于110°C热处理1.5h后,测定热处理后划痕损伤面积S2,按照公式100%×(S1-S2)/S1计算自修复效率,试验结果如下表所示:
由上表可知,与不添加脲咪唑二酮的对比例1及不添加锆酸四丁酯的对比例2相比,实施例1-2制出的全息防伪包装膜的自修复效率均得到了明显地提升,与不添加锆酸四丁酯的对比例2相比,实施例1-2制出的全息防伪包装膜的力学性能和机械强度得到较明显地提升。
实施例1-2首次利用脲咪唑二酮、聚四氢呋喃二醇、间苯二甲基异氰酸酯反应合成具有四重氢键的自修复聚氨酯,同时,锆酸四丁酯中的部分Zr2+还与脲咪唑二酮发生配位反应,形成金属配位键,最终制出兼具四重氢键、金属配位键的动态可逆自修复处理液,并对PET膜表面进行涂覆处理形成自修复聚氨酯保护层,当PET膜在受到尖锐物体刮擦或受重压情况下出现损伤或裂纹后,自修复聚氨酯可在热处理条件下发生重组和可逆交换反应,实现对PET膜的高效快速自动修复,且锆酸四丁酯水解产生纳米氧化锆溶胶,在异氰酸酯基硅烷偶联剂作用下,封堵PET膜表面的不规则微孔和缺陷,提高PET膜机械强度、耐磨性和平整度,进而提高全息防伪包装膜的力学性能及各膜层耐久性,延长使用寿命。
实施例1-2首次采用自修复处理液对PET基膜进行表面防护处理,提高PET膜的耐损伤性能、自修复性能和力学强度,因而也进一步提高了其他膜层的稳定性。
实施例1-2制出的全息防伪包装膜可烫印于不同种类的基材上,能满足高档包装定位与印刷油墨适应性的要求,具有一次性使用、防伪性能强、并能满足环保要求等特点。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节。

Claims (10)

1.一种全息防伪包装膜,其特征在于:该包装膜自上而下依次包括PET膜层(1)、剥离层(2)、着色层(3)、防伪信息层(4)、镀铝层(5)、保护层(6)、粘胶层(7);
所述PET膜层(1)的厚度为8-15μm,是由PET膜经自修复处理液表面处理而成:将自修复处理液均匀涂覆在PET膜两侧,且单侧涂覆厚度为1.5-2.5μm,85-95℃热固化处理1-2h;
所述自修复处理液包括以下质量份原料:聚四氢呋喃二醇40-50份、间苯二甲基异氰酸酯30-45份、脲咪唑二酮5-10份、0.01M氢氧化钠溶液10-15份、二丁基锡二月桂酸酯0.5-1份、氨基硅油10-20份、脂肪酸聚氧乙烯酯0.5-1份、锆酸四丁酯15-20份、异氰酸酯基硅烷偶联剂1-2份、去离子水25-35份。
2.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述自修复处理液的印刷工艺包括以下步骤:
a. 将脲咪唑二酮加入0.01M氢氧化钠溶液中,70-80℃搅拌溶解,得脲咪唑二酮溶液;
b.将聚四氢呋喃二醇升温至105-120℃,在真空条件下,脱水1.5-2h,降温至60-80℃,再于氮气气氛下,与间苯二甲基异氰酸酯、二丁基锡二月桂酸酯混合均匀,再保温搅拌反应3-4h,得聚氨酯预聚体;
c.向聚氨酯预聚体中滴加脲咪唑二酮溶液,滴加完毕后,于70-85℃搅拌反应2-3h,再加入锆酸四丁酯、异氰酸酯基硅烷偶联剂、去离子水,降温至30-40℃,继续搅拌反应1-3h,再加入氨基硅油、脂肪酸聚氧乙烯酯,磁力搅拌均匀后,即得所述自修复处理液。
3.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述剥离层(2)的厚度为0.3-0.5μm,包括以下质量份原料:有机硅树脂40-50份、氟硅改性丙烯酸酯20-30份、三氟丙基甲基环三硅氧烷3-5份。
4.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述着色层(3)的厚度为0.5-1μm,包括以下质量份原料:酚醛环氧树脂15-20份、聚氨酯丙烯酸酯30-40份、1-羟基环己基苯基甲酮0.5-1份、酞青绿G2-4份。
5.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述防伪信息层(4)中设置有全息防伪图案,且该防伪信息层(4)的厚度为1-3μm,包括以下质量份原料:超支化聚氨酯丙烯酸酯35-45份、环氧丙烯酸酯20-30份、1-羟基环己基苯基甲酮0.5-1份、纳米氧化锆溶胶10-20份、异氰酸酯基硅烷偶联剂1-1.5份。
6.根据权利要求1或2或5所述的一种全息防伪包装膜,其特征在于,所述异氰酸酯基硅烷偶联剂包括异氰酸酯基丙基三甲氧基硅烷、异氰酸酯基丙基三乙氧基硅烷中的一种或两种。
7.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述镀铝层(5)的0.3-0.4μm。
8.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述保护层(6)的厚度为0.15-0.2μm,包括以下质量份原料:水性聚氨酯乳液50-60份、丙烯酸-衣康酸共聚物15-25份、聚环氧琥珀酸钠5-10份。
9.根据权利要求1所述的一种全息防伪包装膜,其特征在于,所述粘胶层(7)的厚度为0.4-0.6μm,该粘胶层(7)由乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物按1:(0.3-0.5)的质量比混合制成,并热压复合在保护层(6)下表面。
10.一种根据权利要求1-9任一项所述的全息防伪包装膜的印刷工艺,其特征在于,包括以下步骤:
S1:在PET膜层(1)下表面均匀涂布剥离层(2),并于50-70℃固化成型;
S2:在固化后的剥离层(2)下表面均匀涂布着色层(3),并于温度为50-60℃、紫外光辐射强度为250-350mJ/cm2的条件下,固化成型;
S3:在固化后的着色层(3)下表面均匀涂布防伪信息层(4),再于温度为45-55℃、紫外光辐射强度为180-280mJ/cm2的条件下,固化成型,再采用热转印机将全息防伪图案热转印至防伪信息层(4)中,控制热转印温度为180-220℃、热转印压力为0.3-0.5MPa,得到印有全息防伪图案的半成品;
S4:将印有全息防伪图案的半成品置于射频磁控溅射装置内,抽真空至真空度≤1×10-4Pa,以金属铝为靶材,并在氩气气氛下,按150-200W的溅射功率进行射频磁控溅射,在该半成品的防伪信息层(4)下表面形成镀铝层(5);
S5:在镀铝层(5)下表面均匀涂布保护层(6),并于60-80℃固化成型;
S6:将粘胶层(7)原料乙烯-醋酸乙烯共聚物、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物混合均匀后,于155-175℃加热熔融后,均匀涂布在保护层(6)的下表面,再于温度为180℃、压力为5-10MPa条件下,热压成型形成粘胶层(7),即制得所述全息防伪包装膜。
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