CN110441846B - Three-dimensional grating and preparation method and application thereof - Google Patents
Three-dimensional grating and preparation method and application thereof Download PDFInfo
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- CN110441846B CN110441846B CN201910558026.0A CN201910558026A CN110441846B CN 110441846 B CN110441846 B CN 110441846B CN 201910558026 A CN201910558026 A CN 201910558026A CN 110441846 B CN110441846 B CN 110441846B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
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Abstract
The invention relates to a stereo grating and a preparation method and application thereof. The preparation method of the three-dimensional grating comprises the following steps: arranging a transparent layer on the printed sheet printed with the 3D processed image-text information, wherein the transparent layer at least covers the 3D processed image-text information; providing a hot stamping film, wherein the hot stamping film comprises a base material layer, a release layer and an adhesive layer which are sequentially stacked; covering the hot stamping film on the transparent layer, and enabling one side of the adhesive layer, which is far away from the release layer, to face the transparent layer; hot stamping is carried out from one side of the substrate layer, which is far away from the release layer, so that the adhesive layer is adhered on the transparent layer; and stripping the base material layer of the hot stamping film. Compared with the existing mould pressing process and intaglio printing process for preparing the three-dimensional grating, the method for preparing the three-dimensional grating by using the hot stamping film in the hot stamping mode has the advantages of higher efficiency and lower cost, and does not need equipment transformation.
Description
Technical Field
The invention relates to the field of package printing, in particular to a three-dimensional grating and a preparation method and application thereof.
Background
The packaging printing is an important means and way for improving the added value of the commodity, enhancing the competitiveness of the commodity and developing the market. The three-dimensional printing technology combining the grating three-dimensional imaging technology and the traditional printing technology enables the packaging product to have the effects of three-dimensional depth of field and three-dimensional stereo, and breaks through the planar, static and single visual effects of the traditional printed product.
At present, the method for preparing the packaging stereo grating is mainly divided into two methods: the other is a mould pressing process, namely, firstly preparing a grating female mould, then adopting a hydraulic mode to mould press a transparent plastic sheet into a grating sheet, and then compounding the processed 3D image-text on the back of the grating sheet in a printing or attaching mode, thereby generating a 3D effect. The process is suitable for preparing the whole grating sheet, the efficiency is low, and the manufacturing cost and the die pressing cost of the hydraulic plate are quite high. The other is gravure printing, and the process needs to greatly modify the existing printing equipment, so that the modification cost is high. Have not become the mainstream method of preparation.
Disclosure of Invention
Therefore, it is necessary to provide a method for manufacturing a stereoscopic grating, which has high efficiency and is advantageous for reducing the cost.
In addition, a stereoscopic grating and application thereof are also provided.
A method for preparing a stereo grating comprises the following steps:
arranging a transparent layer on the printed sheet printed with the 3D-processed image-text information, wherein the transparent layer at least covers the 3D-processed image-text information;
providing a hot stamping film, wherein the hot stamping film comprises a base material layer, a release layer and an adhesive layer which are sequentially stacked;
covering the hot stamping film on the transparent layer, so that one side of the adhesive layer, which is far away from the release layer, faces the transparent layer;
carrying out hot stamping from one side of the substrate layer, which is far away from the release layer, so that the adhesive layer is adhered to the transparent layer;
and stripping the base material layer of the hot stamping film.
The method for preparing the three-dimensional grating is prepared by using the hot stamping film in a hot stamping mode, different mould pressing plates do not need to be manufactured, equipment transformation does not need to be carried out, and therefore efficiency is high and cost is low. The existing methods for preparing the stereo grating are mainly two types: the other is a mould pressing process, namely, firstly, a grating female mould is prepared, then a transparent plastic sheet is mould pressed into a grating sheet in a hydraulic mode, and then the processed 3D image-text is compounded on the back of the grating sheet in a printing or attaching mode, so that a 3D effect is generated. The process is suitable for preparing the whole grating sheet, the efficiency is low, and the manufacturing cost and the die pressing cost of the hydraulic plate are quite high. The other is gravure printing, and the process needs to greatly modify the existing printing equipment, so that the modification cost is high.
In one embodiment, the printing mode of the 3D processed image-text information on the printed sheet is selected from one of offset printing, flexo printing, gravure printing, silk printing and digital printing.
In one embodiment, the transparent layer is selected from one of a PET photo glue layer, a BOPP photo glue layer, and a UV photo oil layer.
In one embodiment, the thickness of the transparent layer is 0.001mm to 0.2 mm.
In one embodiment, the thickness of the base material layer of the hot stamping film is 8-20 μm, the thickness of the release layer is 5-20 nm, and the thickness of the adhesive layer is 0.001-0.2 mm.
In one embodiment, the stamping plate used in the stamping is a three-dimensional grating female stamping plate.
In one embodiment, the stereoscopic grating female die stamping plate is selected from one of a dot grating female die stamping plate, a lenticular grating female die stamping plate and a slit grating female die stamping plate, and/or the depth of the depression of the stereoscopic grating female die stamping plate is less than or equal to the thickness of the adhesive layer of the stamping film.
In one embodiment, the temperature during hot stamping is 70-100 ℃, and the pressure is 0.7-1.2 MPa.
The stereoscopic grating prepared by the preparation method for the stereoscopic grating ironing is provided.
The application of the three-dimensional grating in the production of product packaging.
Drawings
FIG. 1 is a schematic structural diagram of a hot stamping film according to an embodiment;
FIG. 2 is a flow chart of a method for fabricating a lenticular lens according to an embodiment;
fig. 3 is a schematic structural diagram of a hot stamping film used for preparing a lenticular lens according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is noted that the terms "upper", "lower", "vertical", "horizontal", "left", "right" and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1, a stamping film 100 according to an embodiment may be used to prepare a lenticular sheet (not shown, the same applies below). The hot stamping film 100 includes a base material layer 110, a release layer 120, and an adhesive layer 130, which are sequentially stacked.
The substrate layer 110 is used for supporting and protecting the adhesive layer 130, and transferring the pressure and heat of the stamping plate during stamping. The base material layer 110 is selected from one of a Biaxially Oriented Polyester (BOPET) film, a biaxially oriented polypropylene (BOPP) film, and a Polyester (PET) film. Preferably, the thickness of the base material layer 110 is 8 μm to 20 μm. When the thickness of the substrate layer 110 is less than 8 μm, the stretch-resistant capability is poor, and the substrate layer is easily broken during the hot stamping process. When the thickness of the substrate layer 110 exceeds 20 μm, the cost increases, and the stamping accuracy of the stamping plate may be affected.
The release layer 120 is formed by drying a release agent. The thickness of the release layer 120 is 5nm to 20 nm. The release layer 120 is arranged to facilitate the peeling of the substrate layer 110 when the stereoscopic grating is manufactured by subsequent hot stamping. Experiments show that if the release layer 120 is too thin, the substrate layer 110 has poor stripping effect and even cannot be completely stripped when the stereo grating is thermoprinted; if the release layer 120 is too thick, the cost is increased.
The adhesive layer 130 is a main body material for forming the lenticular screen after hot stamping. The adhesive layer 130 is formed by curing a hot melt adhesive, which is a transparent thermoplastic resin.
The hot stamping film exists in a film material form and can be used for manufacturing the three-dimensional grating, when the hot stamping film is used for manufacturing the three-dimensional grating, the hot stamping film can be obtained only by using a hot stamping form, and the hot stamping film can be arranged in a whole page or in a local part; after hot stamping and forming, the substrate layer 110 and the release layer 120 are peeled off together, and the thickness of the adhesive layer 130 is only 0.001 mm-0.2 mm, so that the obtained three-dimensional grating is thinner and can be well integrated with a packaging material. The existing integral grating sheet can only be arranged in full-page mode, and the thickness of the existing integral grating sheet is usually more than 0.3mm, so that the existing integral grating sheet cannot be integrated with a packaging material.
The preparation method of the hot stamping film comprises the following steps:
step S110: a release layer 120 is provided on one surface of the base material layer 110.
Specifically, step S110 includes: a release agent is coated on one surface of the base material layer 110, and after drying, a release layer 120 is formed.
In one embodiment, the release agent in step S110 is selected from one of silicone resin, water-based paraffin and mineral wax. For example, the HB electrochemical aluminum mold release agent produced by Shanghai Bihe Industrial & trade Limited, the model ZS-230 mold release resin produced by Jie bangte New Material science and technology Limited in Dongguan City, or the model ZS-2430 aqueous mold release agent produced by Cheng Sheng organosilicon science and technology Limited in Shenzhen City.
Step S120: the adhesive layer 130 is disposed on a side of the release layer 120 away from the substrate layer 110, wherein the thickness of the adhesive layer 130 is 0.001mm to 0.2 mm.
Specifically, step S120 includes: and coating hot melt adhesive on one side of the release layer 120 away from the substrate layer 110, and curing to form an adhesive layer 130.
Further, the hot melt adhesive is selected from one of waterborne polyurethane, polyurethane modified resin and ABS resin. For example, HP-288 aqueous hot melt adhesive of Caiguan printing materials, Inc. of Dongguan city, Youda 920N aqueous alumite back adhesive of Shanghai Wanghai industries, Inc. or JBT-8160 adhesive of Jibante New materials, science and technology, Inc. of Dongguan city are selected.
The hot stamping film 100 or the hot stamping film 100 prepared by the preparation method of the hot stamping film is applied to the preparation of the stereo grating.
The hot stamping film 100 is used for manufacturing the three-dimensional grating, the three-dimensional grating which can be applied to the field of packaging can be prepared only by a hot stamping mode, the existing printing equipment does not need to be transformed, the efficiency is high, the cost is low, the local hot stamping can be performed, the full-page hot stamping can be performed, and the three-dimensional grating obtained by the hot stamping can be well integrated with the packaging material.
Referring to fig. 2 and fig. 3, a method for manufacturing a stereo grating according to an embodiment includes the following steps:
step S210: the transparent layer 300 is disposed on the printed sheet 200 on which the 3D processed graphic information is printed, and the transparent layer 300 covers at least the 3D processed graphic information.
The material of the printed sheet 200 in step S210 is a material for packaging a product, and may be common packaging materials such as paper and plastic. The 3D processed image-text information can be printed in any area of the printed sheet, either partial or full. The printing mode of the image-text information subjected to the 3D processing on the printed sheet is selected from one of offset printing, flexo printing, gravure printing, silk screen printing and digital printing. The transparent layer 300 is arranged to form a certain thickness after being combined with the three-dimensional grating formed after the hot stamping, and the thickness of the transparent layer is inversely proportional to the precision of the three-dimensional grating, namely, the higher the grating precision is, the thinner the transparent layer 300 is, and conversely, the lower the grating precision is, the thicker the transparent layer 300 is, and the depth of field of the grating image can be adjusted through the combination of the two. The transparent layer 300 is a PET optical cement layer, a BOPP optical cement layer or a UV optical oil layer formed by compounding. The thickness of the transparent layer 300 is 0.001mm to 0.2 mm. The smaller the thickness of the transparent layer 300, the smaller the sense of convexity generated on the package after hot stamping, the higher the degree of fusion with the package, whereas the thicker the transparent layer 300, the more pronounced the sense of convexity generated on the package after hot stamping, the lower the degree of fusion with the package.
Step S220: a hot stamping film 100 is provided, wherein the hot stamping film 100 comprises a base material layer 110, a release layer 120 and an adhesive layer 130 which are sequentially stacked. Wherein the thickness of the adhesive layer 130 is 0.001mm to 0.2 mm. Since the maximum precision of the existing female die ironing board is about 0.001mm, this lower limit value is set to match the precision. When the thickness of the adhesive layer exceeds 0.2mm, the thickness of the transparent layer 300 is greatly increased, resulting in a great reduction in the degree of fusion of the lenticular lens with the package. The specific structure and material of stamping film 100 are described above and will not be described in detail.
Step S230: the hot stamping film 100 in step S220 is covered on the transparent layer 300, such that the side of the adhesive layer 130 of the hot stamping film 100 away from the release layer 120 faces the transparent layer 300 in step S210.
Step S240: hot stamping is performed from the side of the base material layer 110 of the hot stamping film 100 away from the release layer 120 in step S230, so that the adhesive layer 130 of the hot stamping film 100 is adhered to the transparent layer 300.
The stamping plate used in step S240 is a lenticular female stamping plate (not shown, the same applies below). The three-dimensional grating female die stamping plate is selected from one of a circular dot grating female die stamping plate, a lenticular grating female die stamping plate and a slit grating female die stamping plate. The concave depth of the used stamping plate of the stereo grating female die is less than or equal to the thickness of the adhesive layer 130 of the stamping film 100.
In a specific embodiment, the used hot plate of the dot grating female die is a hemispherical hot plate with a concave depth of 0.001mm or a hemispherical hot plate with a concave depth of 0.01mm or a hemispherical hot plate of a dot grating female die with a concave depth of 0.1 mm; the used lenticular grating female die stamping plate is a wavy lenticular grating female die stamping plate with the concave depth of 0.15mm or 0.2 mm; the used slit grating female die stamping plate is a slit grating female die stamping plate with the recess depth of 0.2mm, the width of 0.2mm and the interval of 0.2 mm. The hot stamping temperature in the step S240 is 70-100 ℃; the hot stamping pressure is 0.7MPa to 1.2 MPa. Under the hot stamping condition, the adhesive layer can be melted into a glass state, and the structure of the hot stamping film can not be damaged due to overheating.
It should be noted that the 3D processing in step S210 generally includes two types of dot matrix processing and rasterization processing, which are common techniques in the art for preparing the lenticular package printing, and are not described herein too much for the sake of brevity and brevity. When the stamping plate used in the hot stamping in the step S230 is a dot grating female stamping plate, the 3D-processed image-text information on the printed sheet 200 in the step S210 is dot-matrix image-text, and the dot-matrix image-text information and the stereo grating to be hot stamped in the step S230 are designed to be matched with each other; when the stamping plate used in the stamping in step S230 is a lenticular female stamping plate or a slit grating female stamping plate, the 3D processed image-text information on the sheet 200 in step S210 is a rasterized image-text, and the rasterized image-text information and the stereoscopic grating to be stamped in step S230 are designed to be matched with each other.
Step S250: and stripping the base material layer 110 of the hot stamping film 100.
The method for preparing the three-dimensional grating is prepared by using the hot stamping film in a hot stamping mode, does not need to manufacture a hydraulic plate and does not need to modify equipment, so that the efficiency is higher and the cost is lower. The existing methods for preparing the stereo grating are mainly two types: the other is a mould pressing process, namely, firstly preparing a grating female mould, then adopting a hydraulic mode to mould press a transparent plastic sheet into a grating sheet, and then compounding the processed 3D image-text on the back of the grating sheet in a printing or attaching mode, thereby generating a 3D effect. The process is suitable for preparing the whole grating sheet, the efficiency is low, and the manufacturing cost and the die pressing cost of the hydraulic plate are quite high. The other is gravure printing, and the process needs to greatly modify the existing printing equipment, so that the modification cost is high.
The stereo grating prepared by the preparation method of the stereo grating.
The formation principle of the stereo grating is as follows: under the action of heat and pressure of the stamping plate of the female die of the three-dimensional grating, the adhesive layer 130 of the hot stamping film 100 is melted into a glass state, one surface of the adhesive layer 130, which is far away from the release layer 110, is adhered to the surface of the transparent layer 300 on the printed sheet, one surface of the adhesive layer, which is close to the substrate layer 100, is deformed into a shape matched with and opposite to the stamping plate of the female die of the three-dimensional grating under pressure, after the adhesive layer 130 is changed from the glass state into a solid state, the adhesive layer is firmly adhered to the surface of the transparent layer 300 on the printed sheet to form the three-dimensional grating, and the substrate layer 110 of the hot stamping film 100 and the adhesive layer 130, which is not in the stamping area of the female die of the three-dimensional grating, are peeled off along with the release layer 120, so that the three-dimensional grating is obtained.
The stereo grating prepared by the preparation method of the stereo grating or the application of the stereo grating in the production of product packages.
According to the product package, grating imaging is utilized, an observer observes the 3D-processed image-text information printed in the preset area of the printing stock through the transparent three-dimensional grating to show a three-dimensional depth of field and a 3D effect, and the planar, static and single visual effect of the traditional printed matter is broken through.
The following are specific examples:
example 1
1. Preparation of thermoprinting film
(1) And coating an HB electrochemical aluminum release agent on one surface of the PET substrate layer with the thickness of 8 mu m, and drying to form a release layer with the thickness of 5 nm.
(2) And arranging an adhesive layer on one side of the release layer, which is far away from the substrate layer, coating the adhesive layer with HP-288 water-based hot melt adhesive, and curing to form the adhesive layer with the thickness of 0.01 mm.
2. Preparing the three-dimensional grating by using the hot stamping film prepared by the steps
(1) Preparing a transparent layer with the thickness of 0.01mm by using UV gloss oil on a printed sheet printed with image-text information subjected to 3D processing;
(2) providing the prepared hot stamping film, wherein the hot stamping film comprises a base material layer, a release layer and an adhesive layer which are sequentially stacked;
(3) covering the hot stamping film on the transparent layer, and enabling one side of the adhesive layer of the hot stamping film, which is far away from the release layer, to face the transparent layer;
(4) carrying out hot stamping on the three-dimensional dot grating female die stamping plate with the sunken depth of 0.001mm and the hemispherical shape from one side, far away from the release layer, of the base material layer of the hot stamping film to adhere the adhesive layer of the hot stamping film on the transparent layer, wherein the hot stamping temperature is 70 ℃, and the hot stamping pressure is 0.7 MPa;
(5) and stripping the base material layer of the hot stamping film.
Examples 2 to 6
The steps of preparing the hot stamping films and the three-dimensional gratings in the embodiments 2 to 6 are completely the same as those in the embodiment 1, and the other processes are the same except that the materials and the thicknesses of the layers, the types of the hot stamping plates and the depths of the depressions (see the table above for details) are different.
TABLE 1 Specifications and preparation parameters of the thermoprinting film and the three-dimensional grating of the examples
Effect testing
The graphic information under the transparent layer is observed through the three-dimensional grating prepared in each embodiment in a visual observation mode, and is compared with a printed sheet directly observed to contain the graphic information processed in a 3D mode.
TABLE 2 Effect of observation of the examples
In conclusion, compared with the direct observation of the graphic information on the printed sheet, the graphic information under the transparent layer can be observed through the stereoscopic grating prepared by the embodiments, and the three-dimensional stereoscopic effect with the depth of field can be obviously observed. Therefore, the thermoprinting film designed by the scheme is used, and the stereoscopic grating prepared by the related method in the text is applied to the production of product packaging, so that the packaged product has the effects of stereoscopic depth of field and three-dimensional stereoscopic, and the planar, static and single visual effect of the traditional printed product is broken through.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for preparing a three-dimensional grating is characterized by comprising the following steps:
arranging a transparent layer on the printed sheet printed with the 3D processed image-text information, wherein the transparent layer at least covers the 3D processed image-text information;
providing a hot stamping film, wherein the hot stamping film comprises a base material layer, a release layer and an adhesive layer which are sequentially stacked;
covering the hot stamping film on the transparent layer, so that one side of the adhesive layer, which is far away from the release layer, faces the transparent layer;
carrying out hot stamping from one side of the substrate layer, which is far away from the release layer, so that the adhesive layer is adhered to the transparent layer;
stripping the base material layer of the hot stamping film;
the stamping plate used in the hot stamping is a three-dimensional grating female die stamping plate; the adhesive layer is a main body material for forming the three-dimensional grating after hot stamping.
2. The method for preparing a lenticular lens according to claim 1, wherein the 3D processed image-text information on the printed sheet is printed by one of offset printing, flexography, gravure, silk-screen printing and digital printing.
3. The method of claim 1, wherein the transparent layer is selected from one of a PET photo adhesive layer, a BOPP photo adhesive layer and a UV photo oil layer.
4. A method for preparing a lenticular lens according to claim 1 or 3, wherein the thickness of the transparent layer is 0.001mm to 0.2 mm.
5. The method for preparing a stereoscopic grating according to claim 1, wherein the thickness of the substrate layer of the hot stamping film is 8 μm to 20 μm, the thickness of the release layer is 5nm to 20nm, and the thickness of the adhesive layer is 0.001mm to 0.2 mm.
6. The method for preparing a lenticular lens according to claim 1, wherein the adhesive layer is formed by curing a hot melt adhesive, and the hot melt adhesive is a transparent thermoplastic resin.
7. The method for preparing a stereoscopic grating according to claim 1, wherein the stereoscopic grating female die stamping plate is selected from one of a circular dot grating female die stamping plate, a lenticular grating female die stamping plate and a slit grating female die stamping plate, and/or the depth of the depression of the stereoscopic grating female die stamping plate is less than or equal to the thickness of the adhesive layer of the stamping film.
8. The method for preparing the three-dimensional grating according to claim 1 or 7, wherein the temperature during hot stamping is 70-100 ℃ and the pressure is 0.7-1.2 MPa.
9. The stereoscopic grating prepared by the method for preparing the stereoscopic grating according to any one of claims 1 to 8.
10. Use of the lenticular sheet of claim 9 in the manufacture of product packaging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006095902A1 (en) * | 2005-03-11 | 2006-09-14 | Dai Nippon Printing Co., Ltd. | Transfer foil and image forming matter employing it |
| CN102463758A (en) * | 2010-11-12 | 2012-05-23 | 武汉华工图像技术开发有限公司 | Holographic anti-counterfeiting hot stamping film and preparation method thereof |
| CN105398248A (en) * | 2015-12-14 | 2016-03-16 | 武汉华工图像技术开发有限公司 | Integrated laser mark and digitally-printed holographic anti-counterfeiting hot-stamping film |
| CN105751676A (en) * | 2016-04-29 | 2016-07-13 | 珠海市瑞明科技有限公司 | Thermal printing thin film with stereo embossment visible with naked eyes and manufacturing method of thermal printing thin film |
| CN206457459U (en) * | 2016-11-29 | 2017-09-01 | 上海鸿元展印有限公司 | A kind of high durable is without the three-dimensional adhesive sticker joint product in glue side |
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| WO2012002992A1 (en) * | 2010-06-28 | 2012-01-05 | Toray Plastics (America) Inc. | Releasable metalized embossed transfer film |
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2019
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| WO2006095902A1 (en) * | 2005-03-11 | 2006-09-14 | Dai Nippon Printing Co., Ltd. | Transfer foil and image forming matter employing it |
| CN102463758A (en) * | 2010-11-12 | 2012-05-23 | 武汉华工图像技术开发有限公司 | Holographic anti-counterfeiting hot stamping film and preparation method thereof |
| CN105398248A (en) * | 2015-12-14 | 2016-03-16 | 武汉华工图像技术开发有限公司 | Integrated laser mark and digitally-printed holographic anti-counterfeiting hot-stamping film |
| CN105751676A (en) * | 2016-04-29 | 2016-07-13 | 珠海市瑞明科技有限公司 | Thermal printing thin film with stereo embossment visible with naked eyes and manufacturing method of thermal printing thin film |
| CN206457459U (en) * | 2016-11-29 | 2017-09-01 | 上海鸿元展印有限公司 | A kind of high durable is without the three-dimensional adhesive sticker joint product in glue side |
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| CN110441846A (en) | 2019-11-12 |
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