WO2021217343A1 - 一种带有文字全息的镭射膜制备方法 - Google Patents

一种带有文字全息的镭射膜制备方法 Download PDF

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WO2021217343A1
WO2021217343A1 PCT/CN2020/087241 CN2020087241W WO2021217343A1 WO 2021217343 A1 WO2021217343 A1 WO 2021217343A1 CN 2020087241 W CN2020087241 W CN 2020087241W WO 2021217343 A1 WO2021217343 A1 WO 2021217343A1
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film
text
layer
preparing
laser
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PCT/CN2020/087241
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English (en)
French (fr)
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徐祥祥
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江苏金恒新型包装材料有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form

Definitions

  • the invention relates to a method for preparing a laser film, in particular to a method for preparing a seamless laser film with text holography.
  • laser films are divided into holographic and non-slit laser films with holographic text and plain surface effects.
  • the main process of the laser film with text holography is to directly press the information on the base film using a film press plate and then plate the corresponding medium.
  • the film press plate is wrapped by a flat nickel plate on the surface of the steel roller, so that the nickel plate is stitched.
  • Plain or light beam type seamless laser film uses secondary film pressing. After normal film pressing once, the plate seam is overlapped with the information effect, and then pressed again, so that the plate seam also has the information effect.
  • the laser film with seam with text holography always has an obvious seam, which greatly affects the appearance.
  • the seamless laser film with plain surface and other effects adopts the secondary film pressing process, which is only suitable for plain surface or beam type laser film with the same or similar information effect.
  • the laser film with no obvious difference during the secondary superposition is not suitable for the laser film with text holography. .
  • the normal film pressing process uses a nickel plate as a template for pressing, and the temperature during the film pressing process is too high about 150°C, so the pressed base film is easy to deform or wrinkle; the speed of the traditional film press is too slow, Generally 45m/min, which seriously affects the production efficiency; and the production process of the nickel plate is complicated, the quality requirements are very strict, and the manufacturing cost is high.
  • the objective of the present invention is to propose a method for preparing a laser film with a text hologram, which can reduce the film pressure temperature and increase the film pressure speed, thereby improving the fastness and clarity of the base film during printing, and improving the production efficiency. Realize seamless laser film with text hologram.
  • the technical solution adopted by the present invention is a method for preparing a laser film with text holography, which includes the following steps:
  • the film pressure temperature is 90-100°C, and the film pressure speed is 65-80m/min. ;
  • the resin coating includes the following raw materials and weight percentage contents:
  • the pH value of the coating is adjusted to 7-8 by ammonia water.
  • the resin coating includes the following components and weight percentage content:
  • the initiator is ammonium persulfate.
  • the curing agent is aziridine.
  • step (3) the text part of the text layer is exposed.
  • the film pressure temperature is 100°C.
  • the film pressure speed is 70 m/min.
  • the dielectric layer is a metal dielectric layer or a non-metal dielectric layer.
  • the metal dielectric layer is an aluminum dielectric layer or a copper dielectric layer.
  • the non-metal dielectric layer is a zinc sulfide dielectric layer.
  • the laser film with text hologram prepared by the above preparation method is used to coat a coating layer on the PET base film.
  • the raw material of the coating layer is added with the initiator ammonium sulfate to generate sulfate radicals and hydroxide radicals.
  • Base adjust the pH value of ammonia water to adjust the polymerization reaction of the two, reduce the impurity groups brought by the resin system, which is beneficial to the subsequent film pressing process to be uniform, and does not damage the coating layer;
  • the raw material of the coating layer is introduced by the curing agent aziridine , It is beneficial for the film formed after the resin is cured to have a good separation ability from the base film.
  • the coating layer of the present invention not only has the functions of providing holographic carrier and transfer, but also provides a good film pressure environment.
  • the film pressure temperature of 90-100°C can achieve normal film pressure, which greatly reduces the deformation and wrinkling caused by high temperature film pressure. .
  • the speed of the film press is as high as 65-80m/min, which speeds up the production rhythm.
  • the present invention discards the traditional process of pressing the film-pressed nickel plate, adopts the film-to-film process, first prints the exposed part of the text information on the base film, and then uses a roll of film as a template for film pressing. The holographic effect on the template is completely replicated on another roll of film.
  • the film pressing temperature of the present invention is low, the deformation of the base film is small when pressed, the fastness and clarity of the base film during printing are improved, and the yield rate is greatly improved;
  • the film press of the present invention is fast, shortens the production cycle, and improves the production efficiency
  • the present invention adopts a slitless laser film produced by a traditional process as a template, the pressure of the pressing roller is appropriate when the film is pressed, the surface of the film is clean, and it has a good holographic effect;
  • the present invention does not need to make a film-pressing nickel plate, which simplifies the film-pressing process and reduces the production cost;
  • the seamless laser film with text holography prepared by the present invention has good transfer performance between the coating layer and the base film;
  • the seamless laser film with text holography prepared by the present invention has a uniform and beautiful appearance without any seams, and has a wide range of applications.
  • Figure 1 is a flow chart of the preparation process of the present invention.
  • a seamless laser film made by traditional technology is used as a template.
  • the seamless laser film is a flattened metal aluminum film.
  • the printed PET base film is pressed at a temperature of 100°C. Press speed 70m/min, film pressure 20kg, copy the hologram on the printed PET base film;
  • the prepared laser film is a seamless laser film with text holography.
  • the seamless laser film with text hologram prepared in this embodiment is composed of base film, paint layer, text layer and medium layer from bottom to top.
  • the base film layer is PET, and the medium layer is metal aluminum.
  • the yield is Up to 99.5%.
  • a method for preparing a laser film with text holography includes the following steps:
  • a seamless laser film made by traditional technology is used as a template.
  • the seamless laser film is a flattened metal aluminum film.
  • the printed PET base film is pressed at a temperature of 90°C. Press speed 80m/min, film pressure 15kg, copy the hologram on the printed PET base film;
  • the seamless laser film with text holography prepared in this example is composed of base film, paint layer, text layer and medium layer from bottom to top.
  • the base film layer is PET, and the medium layer is metal copper.
  • the yield is Up to 99.2%.
  • a method for preparing a laser film with text holography includes the following steps:
  • a seamless laser film made by traditional technology is used as a template.
  • the seamless laser film is a flattened metal aluminum film.
  • the printed PET base film is pressed at a temperature of 100°C. Press speed 65m/min, film pressure 20kg, copy the hologram on the printed PET base film;
  • the seamless laser film with text hologram prepared in this embodiment is composed of base film, paint layer, text layer and medium layer from bottom to top.
  • the base film layer is PET and the medium layer is non-metallic zinc sulfide.
  • the yield rate is 99.3%.
  • the existing laser film with plate slits is used to make a laser film with text holography, wherein the film pressure temperature is 150°C, the film press speed is 45m/min, the film pressure is 30kg, and the yield rate is 98%.
  • the laser film with text hologram of the present invention adopts a lower film pressure temperature, a faster film pressure speed, and the yield rate is increased to 99.5%, which greatly improves the production efficiency and can be widely used in The field of laser products for text holography.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Holo Graphy (AREA)

Abstract

本发明公开了一种带有文字全息的镭射膜制备方法，包括如下步骤：（1）配制树脂涂料；（2）在PET基膜表面涂布一层树脂涂料制得涂料层；（3）在涂料层上印刷文字信息制得文字层；（4）利用无版缝镭射膜作为模板，对文字层进行膜压加工，将全息复制在PET基膜的文字层，其中膜压温度为90～100℃，膜压速度为65～80m/min；（5）对膜压好的PET基膜进行真空镀介质层。本发明膜压温度低，基膜压制时变形小，提高了基膜的牢度及清晰度，提高了成品率；膜压机速快，缩短了生产周期；采用无版缝膜压版，膜压时压辊压力合适，膜表面干净，全息效果良好；所制得的具有文字全息的无版缝镭射膜，外观均匀美观无版缝。

Description

一种带有文字全息的镭射膜制备方法 技术领域
本发明涉及一种镭射膜的制备方法，尤其涉及一种带有文字全息的无版缝镭射膜的制备方法。
背景技术
随着镭射膜在烟酒、食品、药品及化妆品等领域的包装材料上的广泛应用，镭射膜分为有带有文字全息的有版缝镭射膜和素面等效果的无版缝镭射膜。带有文字全息的镭射膜主要采用的工艺是利用膜压版直接将信息压制在基膜上再镀上相应的介质，膜压版由一块平整的镍版包裹在钢辊表面，从而镍版缝合处会出现一道版缝，导致最终压制成型的镭射膜同样具有相应的一道版缝。素面或光柱类的无版缝镭射膜采用二次膜压，在正常膜压一次后，将版缝与信息效果重叠，再压一次，使得版缝处也同样具有信息效果。
一方面，带有文字全息的有版缝镭射膜始终具有一道明显的版缝，大大影响美观。素面等效果的无版缝镭射膜采用二次膜压工艺只适合于信息效果相同或类似的素面或光柱类镭射膜，二次叠加时没有明显差别的镭射膜，不适用具有文字全息的镭射膜。
另一方面，正常的膜压工艺采用镍版作为模板进行压制，膜压过程中温度太高达150℃左右，因此压制出来的基膜容易变形或者起皱；传统膜压机的机速过慢，一般45m/min，严重影响生产效率；而且镍版的制作过程复杂，质量要求非常苛刻，制造成本很高。
发明内容
发明目的：本发明的目的是提出一种带有文字全息的镭射膜制备方法，能够降低膜压温度和提高膜压速度，进而提高基膜印刷时的牢度及清晰度，提高生产效率，能够实现带有文字全息的无版缝镭射膜。
技术方案：本发明所采用的技术方案是一种带有文字全息的镭射膜制备方法，包括如下步骤：
(1)配制树脂涂料；
(2)在PET基膜表面涂布一层树脂涂料，烘干制得涂料层；
(3)在涂料层上印刷文字信息，烘干制得文字层；
(4)利用无版缝镭射膜作为模板，对文字层进行膜压加工，将全息复制在PET基膜的文字层，其中膜压温度为90～100℃，膜压速度为65～80m/min；
(5)对膜压好的PET基膜进行真空镀介质层，制得带有文字全息的镭射膜。
优选的，步骤(1)中，所述树脂涂料包括如下各组分原料及重量百分比含量：
Figure PCTCN2020087241-appb-000001
Figure PCTCN2020087241-appb-000002
所述各组分原料混合均匀后，通过氨水调节涂料的PH值为7～8。
进一步优选的，所述树脂涂料包括如下各组分及重量百分比含量：
Figure PCTCN2020087241-appb-000003
进一步优选的，所述引发剂为过硫酸铵。
进一步优选的，所述固化剂为氮丙啶。
优选的，步骤(3)中，所述文字层中文字部分为露空的。
优选的，步骤(4)中，所述膜压温度为100℃。
优选的，步骤(4)中，所述膜压速度为70m/min。
优选的，步骤(5)中，所述介质层为金属介质层或非金属介质层。进一步优选的，所述金属介质层为铝介质层或者铜介质层。进一步优选的，所述非金属介质层为硫化锌介质层。
上述制备方法所制备得到的带有文字全息的镭射膜，运用在PET基膜上涂布一层涂料层，该涂料层的原料通过加入引发剂硫酸铵，产生硫酸根自由基和氢氧根自由基，通过氨水调节PH值来调节两者的聚合反应，减少树脂体系带来杂质基团，有利于后续的膜压工序均匀，不破坏涂料层；该涂料层的原料通过引入固化剂氮丙啶，利于树脂固化后形成的膜与基膜具有良好的分离能力。本发明的涂料层不但具有提供全息载体和转移作用，且提供了良好的膜压环境，膜压温度90～100℃能够实现正常膜压，大大减少了高温膜压时造成的变形、起皱现象。膜压机速度高达65～80m/min，加快了生产节奏。本发明摈弃了膜压镍版进行压制的传统工艺，采用膜转膜工艺，先将文字信息中露空部分印刷再基膜上，再用一卷膜作为模板进行膜压，双收双放将模板上的全息效果完全复制在另一卷膜上。
有益效果：同现有技术相比，本发明具有如下显著优点：
(1)本发明膜压温度较低，基膜压制时变形小，提高了基膜印刷时的牢度及清晰度，大大提高了成品率；
(2)本发明膜压机速快，缩短了生产周期，提高了生产效率；
(3)本发明采用传统工艺制作的无版缝镭射膜作为模板，膜压时压辊压力合适，膜表面干净，具有良好的全息效果；
(4)本发明无需制作膜压版镍版，简化了膜压工艺，降低了生产成本；
(5)本发明所制备的具有文字全息的无版缝镭射膜，涂料层与基膜的转移性能好；
(6)本发明所制备的具有文字全息的无版缝镭射膜，外观均匀美观无版缝，使用范围广泛。
附图说明
图1是本发明的制备工艺流程图。
具体实施方式
下面结合附图和实施例对本发明的技术方案作进一步的说明。
实施例1
一种带有文字全息的镭射膜制备方法，其工艺流程图如图1，包括如下步骤：
(1)按重量百分比含量配制树脂涂料，将甲基丙烯酸甲酯10％，丙烯酸丁酯15％，丙烯酸树脂10％，丙酮60％，过硫酸铵3％，氮丙啶2％加入反应釜中混合均匀，再缓慢加入氨水调节涂料的PH值为7；
(2)在PET基膜上涂布一层配制好的树脂涂料，形成涂料层；
(3)在涂料层上印刷相应的文字信息形成文字层，其中文字部分没有印刷到，是露空状态；
(4)采用传统工艺制成的无版缝镭射膜作为模板，其中无版缝镭射膜为压平的金属铝制膜，对印刷好的PET基膜进行膜压，膜压温度100℃，膜压机速度70m/min，膜压压力20kg，将全息复制在印刷好的PET基膜上；
(5)对膜压好的PET基膜进行真空镀金属铝介质层，将全息效果凸显出来。
由于PET基膜上印刷过树脂涂料的区域无法进行膜压，只有露空的文字部分才能进行膜压，因此全息效果体现在文字部分上；同时采用传统工艺制成的无版缝镭射膜为模板，因此制备得到的镭射膜为带有文字全息的无版缝镭射膜。
本实施例所制备的带有文字全息的无版缝镭射膜，从下到上依次为基膜、涂料层、文字层和介质层，其中基膜层为PET，介质层为金属铝，成品率达99.5％。
实施例2
一种带有文字全息的镭射膜制备方法，包括如下步骤：
(1)按重量百分比含量配制树脂涂料，将甲基丙烯酸甲酯20％，丙烯酸丁酯20％，丙烯酸树脂6％，丙酮50％，过硫酸铵2％，氮丙啶2％加入反应釜中混合均匀，再缓慢加入氨水调节涂料的PH值为8；
(2)在PET基膜上涂布一层配制好的树脂涂料，形成涂料层；
(3)在涂料层上印刷相应的文字信息形成文字层，其中文字部分没有印刷到，是露空状态；
(4)采用传统工艺制成的无版缝镭射膜作为模板，其中无版缝镭射膜为压平的金属铝制膜，对印刷好的PET基膜进行膜压，膜压温度90℃，膜压机速度80m/min，膜压压力15kg，将全息复制在印刷好的PET基膜上；
(5)对膜压好的PET基膜进行真空镀金属铜介质层，将全息效果凸显出来。
本实施例所制备的带有文字全息的无版缝镭射膜，从下到上依次为基膜、涂料层、文字层和介质层，其中基膜层为PET，介质层为金属铜，成品率达99.2％。
实施例3
一种带有文字全息的镭射膜制备方法，包括如下步骤：
(1)按重量百分比含量配制树脂涂料，将甲基丙烯酸甲酯25％，丙烯酸丁酯16％，丙烯酸树脂5％，丙酮50％，过硫酸铵3％，氮丙啶1％加入反应釜中混合均匀，再缓慢加入氨水调节涂料的PH值为7；
(2)在PET基膜上涂布一层配制好的树脂涂料，形成涂料层；
(3)在涂料层上印刷相应的文字信息形成文字层，其中文字部分没有印刷到，是露空状态；
(4)采用传统工艺制成的无版缝镭射膜作为模板，其中无版缝镭射膜为压平的金属铝制膜，对印刷好的PET基膜进行膜压，膜压温度100℃，膜压机速度65m/min，膜压压力20kg，将全息复制在印刷好的PET基膜上；
(5)对膜压好的PET基膜进行真空镀非金属硫化锌介质层，将全息效果凸显出来。
本实施例所制备的带有文字全息的无版缝镭射膜，从下到上依次为基膜、涂料层、文字层和介质层，其中基膜层为PET，介质层为非金属硫化锌，成品率达99.3％。
对比例
采用现有的有版缝镭射膜制作带有文字全息的镭射膜，其中膜压温度为150℃，膜压机速度为45m/min，膜压压力30kg，成品率为98％。
由以上可以看出，本发明的带有文字全息的镭射膜，采用更低的膜压温度，更快的膜压速度，成品率提高至99.5％，大大提高了生产效率，可广泛应用于具有文字全息的镭射产品领域。

Claims (10)

  1. 一种带有文字全息的镭射膜制备方法，其特征在于，包括如下步骤：
    (1)配制树脂涂料；
    (2)在PET基膜表面涂布一层树脂涂料，烘干制得涂料层；
    (3)在涂料层上印刷文字信息，烘干制得文字层；
    (4)利用无版缝镭射膜作为模板，对文字层进行膜压加工，将全息复制在PET基膜的文字层，其中膜压温度为90～100℃，膜压速度为65～80m/min；
    (5)对膜压好的PET基膜进行真空镀介质层，制得带有文字全息的镭射膜。
  2. 根据权利要求1所述的一种带有文字全息的镭射膜制备方法，其特征在于：步骤(1)中，所述树脂涂料包括如下各组分原料及重量百分比含量：
    Figure PCTCN2020087241-appb-100001
    所述各组分原料混合均匀后，通过氨水调节涂料的PH值为7～8。
  3. 根据权利要求2所述的一种带有文字全息的镭射膜制备方法，其特征在于：所述引发剂为过硫酸铵。
  4. 根据权利要求2所述的一种带有文字全息的镭射膜制备方法，其特征在于：所述固化剂为氮丙啶。
  5. 根据权利要求1所述的一种带有文字全息的镭射膜制备方法，其特征在于：步骤(3)中，所述文字层中文字部分为露空的。
  6. 根据权利要求1所述的一种带有文字全息的镭射膜制备方法，其特征在于：步骤(4)中，所述膜压温度为100℃。
  7. 根据权利要求1所述的一种带有文字全息的镭射膜制备方法，其特征在于：步骤(4)中，所述膜压速度为70m/min。
  8. 根据权利要求1所述的一种带有文字全息的镭射膜制备方法，其特征在于：步骤(5)中，所述介质层为金属介质层或非金属介质层。
  9. 根据权利要求8所述的一种带有文字全息的镭射膜制备方法，其特征在于：所述金属介质层为铝介质层或者铜介质层。
  10. 根据权利要求8所述的一种带有文字全息的镭射膜制备方法，其特征在于：所述非金属介质层为硫化锌介质层。
PCT/CN2020/087241 2020-04-26 2020-04-27 一种带有文字全息的镭射膜制备方法 WO2021217343A1 (zh)

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