CN101814252B - 具有可视衍射光栅图案的耐洗标签 - Google Patents

具有可视衍射光栅图案的耐洗标签 Download PDF

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Publication number
CN101814252B
CN101814252B CN201010115152.8A CN201010115152A CN101814252B CN 101814252 B CN101814252 B CN 101814252B CN 201010115152 A CN201010115152 A CN 201010115152A CN 101814252 B CN101814252 B CN 101814252B
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Prior art keywords
ground floor
adhesive layer
thermal adhesive
safety
layer
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CN101814252A (zh
Inventor
莉莉·奥博伊尔
盖米尔·圭尔吉斯
尼尔·泰特鲍姆
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Opsec Safety Group Ltd
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Opsec Security Group Inc
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    • G03HHOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00Laminate comprising a hologram layer
    • G03H2250/40Printed information overlapped with the hologram
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03HHOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2270/00Substrate bearing the hologram
    • G03H2270/10Composition
    • G03H2270/12Fibrous, e.g. paper, textile
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03HHOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2270/00Substrate bearing the hologram
    • G03H2270/30Nature
    • G03H2270/31Flexible
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24843Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] with heat sealable or heat releasable adhesive layer

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Abstract

本发明提供了改进的并且新颖的薄的并柔顺的全息织物标签,该全息织物标签用途广泛,具有耐久性、高的全息衍射强度、抗洗涤能力、对织物和标签的变形和损坏最小化,并且该全息织物标签具有经济节省地批量生产的能力。在多重共聚物界面上形成高度结合,并且反射性衍射层在该构造内得到保护,具有对于反复洗涤、干洗循环和机械磨损的优异耐久性,并具有长效的衍射效果和视觉认证性能。

Description

具有可视衍射光栅图案的耐洗标签
技术领域
本发明一般涉及具有展示衍射效果的可视衍射光栅图案的标签。
发明背景
本发明涉及全息标签的改进,全息标签被用于认证、装饰、塑造品牌识别性,以及为服饰和个人衣服以及财物的其它物品增加价值。例如,商标许可人经常需要零售商显示使消费者确信产品被“官方许可”的识别标牌或标签。这些商标可以是运动队、名设计师、音乐家等等的名字和标志。这样被标注商标的物品的感知价值要高于另外的完全相同但没有被加商标的物品。更高的感知价值将支持更高的零售价格,因此便产生了伪造市场。为了确保“官方许可”产品的真实性,商标持有者可以坚持在其货物中引入防伪障碍物。一种被广泛认可的对于伪造的障碍物是全息图。通过全息标签的应用进行商标保护的概念已经众所周知,并且已经被衣服和个人服饰品牌的主要制造商广泛采用。典型地,用于此功能的全息标签被应用于例如压力敏感标签和吊牌的物品。这两种技术的效果有限。
压力敏感标签被典型地构造为高分子膜,例如PET,其具有被施加于一侧的可压花的涂层。可压花的涂层与表面凹凸的全息压模的面相接触,接收该全息表面凹凸图案的精确压印。压印侧随后则典型地被完全涂敷反光层,例如铝,最后施加压力敏感粘合层。与释放衬垫所配合的聚合物基底被冲切,并被卷成一卷待分配标签。这些标签典型地被直接应用于需要被保护的服饰或物品。
可替代地,吊牌一般被构造为中等重量的板式储货并用尼龙绳被附加到服饰上。吊牌可以作为压力敏感全息标签的基底,压力敏感标签覆盖吊牌的小部分还是大部分是依赖于设计和功能性的考虑。最终,这两种应用的方法都是被临时使用,消费者一旦购买后,其一般都被丢弃。此外,全息压力敏感标签的结构经受不住服饰遭受的日常使用和/或洗涤程序。例如,如果标签或吊牌偶尔被遗忘而是贴附着的,它们将马上脱落或被毁掉。人们需要这样的全息标签,其:1)将真实性传达给消费者,2)阻碍伪造,3)增加视觉吸引力,以及4)在服饰原始购买后长时间继续这些功能。
人们在纺织物、服饰以及其类似的全息装饰领域已经作了大量的工作。现有技术主要总结如下:
美国专利4,838,965;5,281,499;5,314,767和5,455,129号描述了使用粘合薄纱并利用各种密封全息衬底边缘的方案,将预制全息衬底贴附在织物上的技术。在一个实施例中,施加到接收全息图区域的热塑丝网印刷油墨将全息衬底的边缘密封,从而避免水分渗透。在另一个实施例中,全息边缘的密封不依赖于使用热力和压力的到织物的应用。在另一个实施例中,全息图的边缘使用热烙铁头或激光切割装置而被密封。然而,应用技术限于几种方式。基于需要所施加的附着剂的量足够膨胀并密封全息衬底的边缘而使用多衬底层(也就是,全息图基底衬底层,粘合薄纱层,油墨/粘合层)将会为成品增加整体的厚度,并不期望地增大服饰的体积和局部僵硬。结果则是一种与看上去为附加的或后来加上去的全息元件进行拙劣地集成的产品。第二,由于织物僵硬的增加而明显改变织物的手感。这认为是对消费者的穿着有害。第三,这种构造不美观并且尺寸对于批量生产是无效的。
美国专利号4,956,040和5,073,222描述了在将多层组件贴附在织物支撑之前,将预制全息标签压在聚酯盖膜和聚酯粘合薄纱背面之间的技术。在这种组件中,由干净的聚酯覆盖层和粘合聚酯薄纱支撑所提供的持久性是差的。进一步,这种结构的总厚度对如上所述的织物手感有同样的有害作用。
美国专利号5,945,201和6,036,810描述了用于服饰的全息识别标牌。特别的,其详细描述了贴附全息箔的技术,该贴附全息箔的技术利用施加到全息图的后表面和织物的前表面的热熔粘合剂。这种结构苦于缺乏完整性,特别是在全息箔部分的边缘。由于构建处理的结果并没有产生附加的耐久性,这样被构建的识别标牌则仅仅依靠全息箔的完整性。已经有所表明,全息箔不能经受洗涤和磨损测试。不采取进一步的保护措施,尽管使用了将它们附加到外衣上的技术,它们还是会变坏。
美国专利5,407,729号描述了多转印方法,其通过在外涂热感应粘胶树脂之前,将可固化的粘胶树脂/增塑剂基底(例如,International Coatings生产的增塑溶胶)施加到选择的图案中,从而将光衍射材料施加到选择的图案中的织物上。随后该基底粘贴结构不确定的光衍射层。释放层、织物和顶层之间的多重注册的转印本身一定不能借用于批量生产技术。进一步,没有规定光衍射顶部件的组成部件,按照给定的说明将难于成功地产生耐久的产品。
美国专利5,510,911号和5,626,702号描述了类似于美国专利5,407,729号的技术,但比其更直接。同样地,描述了类似增塑溶胶粘合剂的图案化应用,在其上通过热力和压力贴附有(优选地)被涂敷全息箔的基于PVC的粘合剂。将落到图案化的增塑溶胶区域以外的剩余的箔去除,而将后面的箔留在所需的图案内。同样,全息箔表现出对外衣典型遭受的普通磨损和洗衣流程的不良的抵抗力。没有进一步的保护手段,全息微结构和全息箔本身随着衍射效率的降低而恶化。
美国专利号5,636,385描述了提供全息图像表面足够-有过多争议地-的保护的技术。描述了包围全息元件的框架构件,因而将该全息元件密封在前段(透明窗口)和后段之间,该后段可以通过各种方式被附加到外衣上。这种构造的三个缺点是:复杂、昂贵以及其在外衣上非常醒目。外衣的外观和感觉完全被改变,并且应用限于这种突出的标识。
美国专利号5,882,770和6,120,710描述了在热塑性有机聚合织物上直接的压花。在这些说明中,没有描述衍射增强的金属化处理,也没有考虑到一旦其被传入织物,可以保护全息微结构的“凸出(indexing out)”的保护顶涂层或层。就这点而言,其实现的是效率相当低的全息图像。由于微结构随着每天的污染而变脏并且由于普通的磨损使未受保护的衍射槽变形并刮伤,衍射效率将进一步降低。
美国专利6,156,412描述了一种与普通介电衍射光栅的描述无差别的织物,其性能由织物面上的被蚀刻的槽的宽度和深度所控制。在该专利的说明书中,没有提到微结构的材料,构造技术或保护。
美国专利6,764,744描述了包括第一纺织品织物层后面的衍射层的复合织物,该第一纺织品织物层通过织物的线之间的自然空洞或通过其它方式(诸如通过图案化的孔)展现出一定程度的透射率。虽然可以使用这种构造产生全息织物标签,但耐久性是有问题的,并且第一织物层与下面的全息层可视干涉,这在清楚和清晰度重要的多数标签应用中是不被期望的。
发明内容
本发明通过利用独特的全息标签结构以提供出色的耐用性、完整性和图像的亮度,从而避免上述的现有技术的限制。本发明提供了改进的并且新颖的全息装置,其具有耐用性,高强度的全息衍射,抗洗涤,织物手感的最小变形,最佳成本化生产的能力。优选地,本发明包括外形薄的、耐久的、固有难于复制的并且外观亮丽的全息标签,其可以被附着到各种各样的纺织物、服装、外衣及其他消费品上。
根据本发明的另一方面,所提供的安全标签包括:
第一层,其具有形成在其中的衍射结构;
热粘合第二层,其直接接触到、被结合到、并符合于第一层的具有全息图的区域;以及,
其中,第一层和热粘合层具有n>0.1的折射率差,使得可视衍射效果可以从衍射自其界面的光看到。
根据本发明,一般提供了独特的聚合膜,直接地在其之上构建有高质量辐射-固化全息标签。更特别地,包括例如美国专利4,933,120号,5,003,915号;5,083,850号;5,085,514号;和5,116,548号(上述五个专利全部以参考的形式并入本申请)的几个专利中概括了原位(in situ)辐射可固化树脂技术,其被用于将全息层直接施加到聚合膜上。反射层被施加到衍射表面凹凸结构上,从而提高预期标签的至少一个部分的可见度。同时,区域的至少一个部分没有反射层,从而提供了到织物附属品的粘合剂的直接接触。本发明的独特方面是在较高的密封和可靠结合的预料不到的效果,该可靠结合在承受多次水洗和干洗循环的聚合体之间。标签的整个结构很薄并且柔顺;进一步,其能够以节省成本的方式生产,其在上述引用的现有技术中没有被详细说明,或者没有在一个实施例中预期。
根据本发明的一个方面,提供了一种安全标签,其包括:
第一层,所述第一层具有形成在其中的衍射光栅图案;
热粘合第二层,其直接接触到、被结合到、并符合于第一层的具有衍射光栅图案的区域;以及
反射层,其被夹在第一和第二层之间,并与第一和第二层接触,使得反射层至少符合于衍射光栅图案的部分,并使得反射层被第一和第二层封装。
各种材料和材料的结合可以被用于载体和构造的底部织物粘合层。已经发现,使用热塑材料为构造的生产和构造到织物的粘合力提供了优点,如下面更为详细的描述。热塑材料将具有相应的有彼此相容的软化或熔化点,并且提供顶层和底层到织物的粘合力,而基本不分解织物。
载体材料也基本对紫外(UV)光透明。而几乎所有有机复合物吸收UV范围内的一些光,即,从大约400纳米到大约190纳米,优选的聚合物在该范围的全部或一部分将会有低的或最小的吸收。
已知的可以使用的范围从晶体膜、半晶体膜到非晶体膜(基本紫外透明)的品种繁多的聚合物载体包括,例如,一定的聚(甲基丙烯酸甲酯)(PMMA),聚(甲基丙烯酸丁酯),硅酮(诸如聚(二甲基硅氧烷)(PDMS)),聚酰胺,聚(甲基戊烯),烯烃共聚物(诸如乙烯耐波龙聚高分子)(从来自Ticona的名为8007处可以购买),热塑性聚氨酯(TPU)(可以从名为
Figure GSA00000021082600052
处可以购买),例如,从BayerMaterialScience AG可以购买的DP 9650DU,DP 9659DU,DP 9662DU和DP 9665DU),聚苯乙烯,氢化聚(苯乙烯)、聚对二甲苯(可从名为PARYLENE C处购买),聚烯烃(诸如聚丙烯(PP)和高密度聚乙烯(HDPE)),二元乙丙橡胶,聚酯共聚物和聚脂(诸如聚(丁烯对苯二酸盐和聚(乙烯)对苯二酸盐)(从来自DuPont的名为
Figure GSA00000021082600053
处可购买)。
底部聚合粘合膜层优选为热粘合剂,诸如典型在大约0.5到7.0密耳厚度的范围内的聚酰胺,聚氨酯树脂粘合膜。薄膜式测量器的选择至少根据1)底基织物的密度、纤维直径以及纤维化学结构,2)成品标签构造的预期用途,以及3)结合方法的参数,包括贯穿结合操作的温度、展宽以及压力值。在本发明中有用的热粘合膜的例子是从BemisAssociates of Shirely,Massachusetts处可以购买到的聚酰胺、聚氨酯树脂及类似的粘合膜。
已经说明了优选的聚酰胺粘合膜为广泛的自然的和合成的织物底基提供优良的粘合剂。聚酰胺膜依靠加热而部分地深入织物基底层,有效地密封了全息元件的背面并提供了高度的耐水解性。进一步,聚酰胺粘合膜使辐射固化的全息元件非常优良。因此,根据本发明的优选实施例,利用耐水解的聚酰胺膜提供优异的粘合质量,并且耐水解的聚酰胺膜作为多层全息标签中的至少一层。除了聚酰胺、聚氨酯树脂,根据织物及应用,聚合物也是很好的选择。
优选地,辐射固化的全息元件被涂覆有衍射增强层,例如铝。对于产品外观的进一步变体,例如美国专利第5,044,707号;第5,128,779号;第5,142,383号;第5,145,212号以及第5,411,296号(前述的全部五个专利以参考的方式被结合入本申请)中所描述的,铝衍射增强层也可以被图案金属化,而并没有对本发明的功能产生不利的影响。
衍射增强层不局限于铝,并可以采用本领域中所使用的其它常见材料的形式,包括其它金属氧化物或折射非有机化合物,诸如二氧化钛或硫化锌。
在衍射增强处理(诸如,金属化)之后,全息元件可以在其正面被涂覆透明的辐射-可固化外涂层(例如紫外可固化外涂层)或其它类型的保护层,从而改进全息元件的功能性性能、耐久性并作用于其它品质,诸如光泽和滑动。
说明书附图
以下对本发明的详细的描述,以举例的方式(不是以限制本发明为目的),结合附图将更好的被理解,其中:
图1是典型的全息元件的结构的剖面图;
图2是相同的全息元件的示意图,其具有施加到微结构侧面的衍射增强铝层;
图3是示出了部分覆盖有被施加到衍射增强层的反射层的衍射结构的示意图;
图3A为横截面图,其示出了当使用脱金属方法时所得到的其中一个结构,所述方法在碱洗之前在金属保护的所需区域上进行防印(resist printing)而获得金属图案,碱洗而去除不受防印保护的区域中的反射层;
图4是被置于热粘合层和基底织物上的全息元件的示意图;
图4A示出了被置于多个粘合层之上的全息元件,以便在全息标签和特定的基底织物或材料之间提供最佳粘合作用;
图4B示出了图4A中所示的全息元件,其被除去了载体。
图4C示出了全息元件的一个实施例,其中,没有被密封的反射层,以及其中,衍射来自符合全息的两个层的衍射率差。
图5是图4的全息元件的一个示意图,其中含有印刷元件。
图6是如图5结构的全息元件的一个示意图,其中具有附加的RFID卡。
具体实施例
现参照说明书附图进行描述,其中,在全部的各个附图中,相同的元件使用相同的标号。
图1示出了本发明的典型的全息元件10的截面图。粘合膜基底衬底100在其上被设置有基本透明的低聚物树脂层110,当与全息冲压工具130紧密接触时,该基本透明的低聚物树脂层110被固化。层100由一个或更多个的聚合膜组成。全息复制工具130将全息微结构图案120传递给低聚物树脂,在该树脂的表面产生了负图案120。一旦该树脂层110被固化而且全息冲压工具130被去除,图案120则留存固定在所述树脂的顶表面。
图2示出了全息元件120,其中,反射材料薄层(例如铝121)被附着在该微结构图案上。这大大提高了反射性并因而提高了所述微结构的衍射性能。该铝可以被全部或部分地脱金属,这将在后面进行描述。
图3示出了全息层110被部分地涂覆有反射层121,其中,反射层被设置在选择的区域。该选择的区域可以是一个较大的区或者其可以包含很多较小的区。反射层121的形式可以是用于品牌用途或批量用途的图形图案、标志或文本或者其他标志识。图3A示出了脱金属处理后保护层160被留存在金属表面121上。
图4示出了被设置在热粘合剂层170和基底织物200上的全息元件110;在热力和压力载体100上,没有反射层121的全息层110的部分与热塑粘合剂170直接接触,全息层110和粘合剂170被牢固地结合在一起,因此,视觉增强反射层121被密封并被很好地保护。应理解的是,聚酰胺的热粘合剂或其他膜170与基底织物200的上表面相互结合,是由于对热塑膜基底衬底170充分加热,同时施加向下的压力,促使软化的聚合物紧靠并进入基底织物200的结果。在图4A中,根据衬底的情况,有可能需要附加的热塑粘合剂180以获得优异的结合。辐射可固化层110和载体层100不受施加热力和压力的影响,因为它们不是热塑材料,因此在这种条件下不会流动。全息微结构因此不受影响并保持明亮和高度衍射。并且可经受多重水洗和干洗。图4B示出了载体100从全息层110被去除。载体100的去除产生了比图4和4A中更薄的结构。
本发明的替代实施例如图4C所示。在这个次优选的实施例中,不需要反射层。来自全息层的可视衍射是由它们之间具有足够大的折射率差的全息层110和粘合层170造成的。虽然Δn=N110-N170>|0.1|的折射率差对于一些可视衍射是足够的,但优选的是,层110和层170所选择的材料具有足够大的折射率差,使得发生明显可视的衍射。
全息图层110的示例性材料在633nm为:聚(α-萘甲基丙烯酸)n=1.641,聚(十溴甲基丙烯酸)n=1.71,以及聚对苯乙烯n=2.1。还需要注意的是,可以通过适当地将聚合物进行掺杂来提高或降低聚合物的折射率。
粘合层170的示例性材料优选具有n在1.45到1.55之间的值。例如,典型的塑料具有n在1.46到1.55范围内的值。聚酰胺的折射率为1.53。聚氨酯树脂具有n=1.6的值。
在图4C的实施例中,不需要层100的存在。
本发明的全息织物标签可以被产生在织物的第一条带或片上,该织物的第一条带或片随后被切割成分离的全息标签,而该分离的全息标签随后被贴附到独立的外衣或单件衣饰。可替代地,使用热力和压力可以将本发明的全息织物标签直接施加到成品外衣、衣饰及其部分上,从而产生永久结合的独立的标签。
图5示出了全息标签并在顶部之内或之上引入了用于附加的标示商标、批量、编号的印花190。印花油墨在非常特定的区域可以被染色,着色和/或加标记,从而具有安全性并节省成本。
图6示出了具有附加的射频识别(RFID)卡400的如图5中所公开的类型的全息标签300。RFID卡400优选为已知的无源标签,其包括天线和CMOS集成电路。在全息标签300内***RFID卡仍为该标签增加了另一种方式的安全性。
在一个实施例中,该全息图的形成不局限于在微结构化的表面上沉积光学反射层之前在载体上沉积UV可固化树脂,该全息图的形成也通过在清晰或金属化的漆层上压花来完成。该全息标签引入了对完全金属化表面的脱金属化或引入了图案金属化。该金属化层或脱金属化层按照下述方式被生产。第一、金属层被沉积在全息图上。在一个实施例中,该金属层可以是沉积在全息图表面的连续层并且其足够薄,从而不会降低该全息标签的柔软性。另一方面,一般期望该金属层足够厚,使其肉眼可见。该金属层或脱金属层按照如下方式被生产。
该金属层为大约20到2000埃米(
Figure GSA00000021082600081
)厚,特别为大约50到1000
Figure GSA00000021082600082
厚,更特别为大约100到大约500
Figure GSA00000021082600083
厚,以及更特别为大约150到大约300
Figure GSA00000021082600084
厚。该金属层可以通过化学气相沉积法(CVD),热膨胀等离子体法(ETP),离子植入法,等离子增强化学气相沉积法(PECVD),金属有机化学气相沉积法(MOCVD)(也被称作有机金属化学气相沉积法(OMCVD)),金属有机气相外延法(MOVPE),物理气相沉积处理,诸如溅镀、反应电子束(e-束)沉积,以及等离子体喷涂。举例性的处理方法是CVD和PECVD。
在金属层中使用的示例性的金属是铜、铝、铬或类似金属,或包含前述金属中的至少一种金属的组合。
在将该金属沉积在全息图上之后,将掩模放置在该金属层的与全息图接触的表面相对的表面上。如上面所记载的,需要掩模具有在该多层装置上所需的图像的正图像。在一个实施例中,该掩模可以包括阻碍蚀刻过程的油漆、油墨或清漆。该油漆、油墨或清漆可以通过印刷装置被施加到该金属表面。
在另一个实施例中,该掩模可以包括阻碍蚀刻过程的有机聚合物。在该实施例中,由两个或更多的不相容的高分子相(polymeric phase)所产生的图案(例如一个由嵌段共聚物产生),首先经受蚀刻或降解从而去除高分子相中的一个。留存的相形成了可以随后被用作掩模的图案的正图像。这种图案的例子可以在交替的嵌段共聚物,无规嵌段共聚物,星形嵌段共聚物及其类似中获得。在该金属层中产生有大约20到200
Figure GSA00000021082600091
的特征。这些特征可以是周期性的或非周期性的。
在另一个实施例中,该掩模可以包括阻碍蚀刻过程的陶瓷或金属。在优选实施例中,该掩模包括阻碍蚀刻过程的油墨。
蚀刻过程可以使用化学蚀刻液或基于辐射的蚀刻剂。适合的化学蚀刻液的例子是pH为大约8到大约14的碱性溶液。适合的碱性溶液例如包含氢氧化钠、氢氧化钾、氢氧化铵或类似物,或者包含前述碱性溶液中的至少一个的组合。
pH小于7的酸性溶液也可以被用作蚀刻液。在一个示例性实施例中,可以用酸蚀刻铝金属。可以使用弱硫酸(mild sulfuric acid)蚀刻沉积在衬底上的铜层。
在另一个实施例中,可以使用基于辐射的蚀刻剂。例如,可以使用离子束有选择地蚀刻没有被掩模覆盖的金属层的部分。该金属层可以通过蚀刻过程部分地或全部被去除,从而产生非全息图像。
在一个实施例中,在一种生产金属化或脱金属化的安全装置的方式中,全息图被涂覆以铝金属。包括所需的非全息图像的正图像的掩模,被设置在与全息图接触的表面相对的金属表面上。在沉积该掩模之后,将全息标签置于包含碱性溶液(例如,氢氧化钠)的托盘中。
虽然一旦碱性溶液被应用到金属化表面,蚀刻效果就实际上立即发生,但可能需要允许该溶液保持与金属化表面接触一定量的时间,以使得化学反应在与溶液接触的那些区域中完成。
为了停止该溶液的氧化效果,金属化表面可以用弱酸和/或水(优选不可回收的)清洗。例如,可以将金属化表面(预先印刷的)穿过清洗区域,在该清洁区域中,剩余的氢氧化钠和氧化的金属(即,氧化铝)可以通过用弱酸清洗而去除。在一个示例性实施例中,水将浸润整个金属化表面的被印刷的区域。例如,可以使用精细的喷水器覆盖整个被印刷的区域。为了使清洗过程更加有效并且为了全部去除化学过程的残留物,每次可以使用淡水重复清洗一次或更多次。
在该多层装置进入干燥站之前,可能需要从金属化的表面去除过多的水分,从而促使任何剩余水分的蒸发。为了去除水分,建议使用一对滚筒(例如,一个是橡胶的而另一个是金属的),空气滤清器,海绵和/或喷气器。最后,将该金属化的装置穿过干燥单元进行热干燥(例如,使用电阻加热),从而完全从材料去除水分。
在一个实施例中,光学透明的保护层(未示出)被设置在全息图上。该光学透明的保护层一般包括有机聚合物。在光学透明的保护层中所使用的有机聚合物,可以选择自多种热塑性聚合物、热塑性聚合物的混合物、热固性聚合物或热塑性聚合物与热固性聚合物的混合物。该有机聚合物可以是聚合物、共聚物、三元共聚物的混合物或包含前述有机聚合物中的至少一种的组合。该有机聚合物可以是齐聚物、同聚物、共聚物、嵌段共聚物、交替嵌段共聚物、无规聚合物、无规共聚物、无规嵌段共聚物、接枝共聚物、星形嵌段共聚物、树枝状高分子或类似物或者包含前述有机聚合物中的至少一种的组合。在一个实施例中,光学透明的保护层中所使用的有机聚合物一般需要是对于紫外辐射为透明的。在另一个实施例中,在光学透明的保护层中使用的有机聚合物需要是对于紫外光为不透明的。
有机聚合物例如为聚缩醛、聚烯烃、聚丙烯酸、聚碳酸酯、聚苯乙烯、聚酯纤维、聚酰胺、聚酰胺酰亚胺、多芳基化合物、聚芳砜、聚苯醚砜、聚苯硫醚、聚氯乙烯、聚砜、聚酰亚胺、聚醚酰亚胺、聚四氟乙烯、聚醚酮、聚醚醚硐、聚醚酮、聚甲醛、聚乙烯醚、聚乙烯硫醚、聚乙烯醇、聚乙烯醇酮、聚乙烯醇卤化物、聚乙烯醇腈、聚乙烯酯、多磺酸盐、多硫化物、聚硫酯、聚砜、聚磺酰胺、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁、聚亚安酯、三元乙丙橡胶、聚四氟乙烯、氟化乙丙烯、全氟烷氧基乙烯(perfluoroalkoxyethylene),聚三氟氯乙烯、聚偏二氟乙烯或其类似,或者包括前述有机聚合物中的至少一种的组合。
热固性聚合物例如包括聚亚安酯、天然橡胶、酚醛树脂、聚酯纤维、聚酰胺、硅酮或其类似,或者包括前述热固性聚合物中的至少一种的组合。可以利用热固性聚合物的混合物以及热塑性聚合物与热固性聚合物的混合物。可以被用作光学透明的保护层的示例性有机聚合物是,对于紫外辐射透明的聚烯烃、聚甲基丙烯酸甲酯、聚碳酸酯或聚酯纤维。
光学透明的保护层需要具有的光透射率为大于或等于大约30%,特别地大于或等于大约50%,以及更特别地大于或等于大约70%,以及甚至更特别地大于或等于大约90%。
本发明因此提供了可以被永久地贴附在服饰上的耐久的全息织物标签。通过生成这种改进的全息标签,实现了几个层次的价值:耐久,本身(inherently)难于被复制,并且外观亮丽。本发明可以作为单独的全息装置被应用在服装上,或者利用在其它情况下用于实用的生产商的说明性标签的空间。在这个后面的实施例中,该耐久的标签进一步作为承载信息的装置。本发明通过生成非常耐久的全息标签并且该非常耐久的全息标签被永久地固定在贵重的物品上,因而提供了改进的和新颖的方法。本发明进一步提供了特别适合于直接应用到衣服物品的改进的全息标签,并提供了制造方法,该制造方法允许对这种标签进行经济节省的复制和应用。此外,本发明经仔细选择组成膜层厚度,提供了具有宽范围光泽度的标签表面。
该全息标签不必须被单独用作标签。其可以被制成可以用在外衣、手袋、特种商品或类似物上的宽网(wide web)、大而平的形式。其还可以被用作广告材料或装饰材料。
虽然已经详细描述了本发明及其优点,应当理解的是,在不背离所附的权利要求所限定的本发明的精神和范围的情况下,可以制作各种变化、置换和改变。而且,本发明的范围不限于说明书描述的特定实施例的过程、机器、制造以及物品、手段、方法和步骤的组合。本领域的技术人员已经从本发明所公开的内容理解到,可以根据本发明利用现在存在的或以后被开发的过程、机器、制造、物品、手段、方法或步骤的组合,该过程、机器、制造、物品、手段、方法或步骤的组合与被描述的相应的实施例实现基本相同的功能或获得基本相同的结果。因此,所附权利要求将这些过程、机器、制造,物品、手段、方法或步骤的组合包括在其范围内。

Claims (18)

1.一种安全标签,其包括:
第一层,其具有形成在其中的衍射光栅图案;
热粘合层,其直接接触于、符合于并被结合于具有所述衍射光栅图案的所述第一层的区域,其中,所述热粘合层的厚度在0.5-7.0密耳之间;以及,
反射层,其被夹在所述第一层和所述热粘合层之间并与所述第一层和所述热粘合层接触,以使得所述反射层符合于至少部分所述衍射光栅图案,并使得所述反射层被所述第一层和所述热粘合层密封。
2.根据权利要求1所述的安全标签,其中,所述第一层和所述热粘合层之间的结合强于所述反射层与所述第一层和所述热粘合层中任一个之间的结合。
3.根据权利要求1所述的安全标签,其中,所述第一层是辐射可固化材料。
4.根据权利要求3所述的安全标签,其中,所述反射层是图案化层,其具有被所述第一层和所述热粘合层密封的反射材料的区域,以及其中,所述第一层的向外的面是平的并且所述热粘合层的向外的面是平的,以及其中,至少有所述第一层和所述热粘合层的向内的面的区域是不平的,所述第一层和所述热粘合层的向内的面的区域所采用的形式是所述衍射光栅图案。
5.根据权利要求4所述的安全标签,还包括用于支撑所述第一层的基于聚合物的载体,其对于UV光基本透明,以及其中,所述热粘合层是适合于织物贴附的热塑层。
6.根据权利要求4所述的安全标签,其中,具有形成在其中的所述衍射光栅图案的所述第一层包括寡聚树脂。
7.根据权利要求4所述的安全标签,其中,所述反射层的形式为文本或标志。
8.根据权利要求5所述的安全标签,其中,所述基于聚合物的载体是一个层,该层为聚甲基丙烯酸甲酯、聚甲基丙烯酸丁酯、硅酮、聚甲基戊烯、烯烃共聚物、热塑性聚氨酯TPU、聚苯乙烯、氢化聚苯乙烯、聚对苯二甲基、聚烯烃、二元乙丙橡胶、聚酯纤维共聚物和聚脂以及其混合物中的一个。
9.根据权利要求1所述的安全标签,其中,所述衍射光栅图案是全息图,以及其中,所述第一层是基本透光的。
10.根据权利要求9所述的安全标签,其中,所述全息图被压花到所述第一层内。
11.根据权利要求1所述的安全标签,其中,所述热粘合层包括聚酰胺、聚亚安酯或聚酯纤维。
12.根据权利要求1所述的安全标签,其中,所述热粘合层在热力和压力的作用下被结合到纺织物层,以使得所述标签被部分地植入所述纺织物层。
13.根据权利要求1所述的安全标签,还包括在所述第一层或所述热粘合层或所述反射层内的或所述第一层或所述热粘合层或所述反射层上的变色颜料。
14.根据权利要求1所述的安全标签,还包括隐藏标记。
15.根据权利要求14所述的安全标签,还包括在其内或其上的RFID。
16.根据权利要求1所限定的安全标签的用途,将所述安全标签附加到外衣、手袋、安全盒、衣服、鞋或特种物品。
17.一种安全标签,其包括:
第一层,其具有形成在其中的衍射结构;
热粘合层,其直接接触于、被结合于并符合于具有所述衍射结构的所述第一层的区域;以及
其中,所述第一层和所述热粘合层具有折射率差Δn,所述折射率差Δn>0.1,以使得可视衍射效果可以从衍射自其界面的光看见。
18.根据权利要求17所述的安全标签,其还包括被设置于所述第一层和所述热粘合层之间并被所述第一层和所述热粘合层密封的反射层。
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