Scraping structure and preparation method thereof

Abstract

The invention discloses a scraping structure and a preparation method thereof, the scraping structure comprises a substrate layer, an information layer and a covering layer which are sequentially stacked, the information layer is obtained through reverse process printing, and the covering layer can be scraped and removed. According to the scraping structure, the information layer is obtained by printing through the reverse technology, the reverse technology comprises the bottom oil and the surface oil which are arranged in a stacked mode and repel each other, and the technology surface is flat and shows a highlight area on the portion where the bottom oil is independently arranged. A plurality of micro protrusions are arranged on the overlapped portion of the base oil and the surface oil and on the process surface and are represented as matte areas, graphic and text information of the information layer is presented through the optical contrast of the highlight areas and the matte areas, the graphic and text information of the information layer is not presented through colors, and therefore the graphic and text information can be easily covered by the covering layer, the covering layer of the highlight areas can be completely removed, and the information layer can be easily covered by the information layer. The covering layer of the matte area can only be partially removed, and the residual covering layer ink can enhance the color of the graphic and text information of the information layer, so that an obvious scratch presentation effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and particularly to a scratch-off structure and a preparation method thereof. Background Art

[0002] The existing scratch-off structure includes a base layer, an information layer, a release layer, and a covering layer which are sequentially stacked. The information layer is usually printed with a colored ink, such as black. To make the covering layer have an ideal covering effect, the covering layer usually needs to be screen-printed 2-3 times to reach a certain thickness, which will bring the following two problems: (1) Multiple screen-printings result in high process costs, limiting its application in packaging; (2) When the base layer is thin, in the case of backlight, the content of the information layer can still be faintly seen from the reverse side, which will lead to leakage of secrets. Summary of the Invention

[0003] Based on this, it is necessary to provide a scratch-off structure and a preparation method thereof to solve the above problems.

[0004] A scratch-off structure includes a base layer, an information layer, and a covering layer which are sequentially stacked. The information layer is printed by a reverse process, and the covering layer can be scratched off and removed.

[0005] In one embodiment, the reverse process includes a base oil and a top oil which are stacked, and the top oil is mutually exclusive with the base oil.

[0006] In one embodiment, the base oil is an offset printing reverse base oil, and the top oil is an aqueous reverse varnish.

[0007] In one embodiment, the base oil is a UV reverse base oil, and the top oil is a UV reverse varnish.

[0008] In one embodiment, by mass percentage, the top oil contains 0.2% - 2% of silicone oil.

[0009] In one embodiment, the covering layer is obtained by offset printing.

[0010] In one embodiment, a graphic layer is further provided between the base layer and the information layer.

[0011] In one embodiment, both the base oil and the top oil are transparent.

[0012] In one embodiment, by mass percentage, 1% - 10% of colored ink is mixed in the base oil.

[0013] For the above-mentioned scratch-off structure, the information layer is obtained by reverse printing. The reverse printing process includes an undercoat and a topcoat that are stacked and mutually exclusive. When the undercoat is set alone, the surface of the process is flat, presenting a high-gloss area. In the overlapping part of the undercoat and the topcoat, the surface of the process has numerous micro-protrusions, presenting a matte area. The graphic information of the information layer is presented by the optical contrast between the high-gloss area and the matte area. Since the graphic information of the information layer is not presented by color, it can be easily covered by the covering layer. When the consumer removes the covering layer by scratching, the covering layer in the high-gloss area can be completely removed because the contact surface is flat, while the covering layer in the matte area can only be partially removed because the contact surface is uneven. The covering layer ink remaining between the micro-protrusions will enhance the color of the graphic information of the information layer, thus achieving an obvious scratch-off presentation effect.

[0014] The beneficial effects of the above-mentioned scratch-off structure include: (1) Since the graphic information of the information layer is presented by optical contrast and there is no substantial color to be covered, only a very thin covering layer is needed to achieve an ideal covering effect, and the setting of the covering layer can be realized at low cost through offset printing. (2) After setting the covering layer, the optical contrast between the high-gloss area and the matte area can be completely eliminated. Therefore, even if the base layer is very thin, it is impossible to view through backlighting, and the confidentiality is strong. (3) After the covering layer is removed, the remaining covering layer can enhance the color of the graphic information in the matte area.

[0015] A preparation method of a scratch-off structure includes the following steps:

[0016] Set the information layer, and the information layer is obtained by reverse printing;

[0017] Set a covering layer on the information layer, and the covering layer can be scratched off. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a scratch-off structure in a pre-scratched state according to an embodiment;

[0019] Figure 2 For Figure 1 It is a schematic structural diagram of the scratch-off structure shown in

[0020] Figure 3 For Figure 2 It is an enlarged schematic diagram of part A of the scratch-off structure shown in

[0021] Figure 4 It is a schematic structural diagram of another scratch-off structure in a pre-scratched state;

[0022] Figure 5 It is a flowchart of the preparation method of a scratch-off structure according to an embodiment. Detailed Embodiments

[0023] In order to make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" or "communicated with" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "upper", "lower", "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0025] The following will mainly further describe the scraping structure in detail with reference to the accompanying drawings and specific embodiments.

[0026] For a scraping structure of an embodiment, please refer to Figures 1 - 3 , the scraping structure includes a base layer 10, an information layer 20 and a covering layer 30 which are stacked.

[0027] The base layer 10 is used to carry the information layer 20, and the base layer 10 is usually a packaging material.

[0028] Optionally, the materials of the base layer 10 include but are not limited to: paper, film, paper - plastic composite material and aluminum - plastic composite material.

[0029] The information layer 20 is stacked on the base layer 10, and the information layer 20 is obtained by reverse printing.

[0030] Specifically, the reverse process includes an under - coat 21 and a top - coat 22 which are stacked and mutually exclusive. When printing, first, the under - coat 21 is locally printed on the base layer 10, and then the top - coat 22 is coated over the whole area. Since the top - coat 22 and the under - coat 21 are mutually exclusive, in the area where the under - coat 21 and the top - coat 22 overlap, the top - coat 22 on the surface layer shrinks and aggregates under the repulsive action of the under - coat 21, thus forming many micro - protrusions arranged at intervals above the under - coat 21, and the under - coat 21 located between the micro - protrusions is in an exposed state. Due to the unevenness of the process surface, incident light will be mainly diffusely reflected in this area, showing a matte area. In the area where only the top - coat 22 is provided, the process surface is flat, and incident light will be mainly specularly reflected in this area, showing a high - light area. Through the optical contrast between the high - light area and the matte area, special graphic information can be presented to the human eye.

[0031] Optionally, the base oil 21 is a commercially available ordinary offset reverse base oil, and the topcoat 22 is a commercially available ordinary water-based reverse varnish. Through the reverse process, a water-based reverse effect can be printed.

[0032] Optionally, the base oil 21 is a commercially available UV offset reverse base oil, and the topcoat 22 is a commercially available UV reverse varnish. Through the reverse process, a UV reverse effect can be printed.

[0033] In this embodiment, both the base oil 21 and the topcoat 22 are transparent. The graphic information of the information layer 20 is presented entirely by optical contrast. After the covering layer 30 is provided above the information layer 20, the optical contrast effect can be completely eliminated from both the front and back sides. At this time, the base layer 10 can even be a transparent film, solving the problem that the traditional scratch-off structure must use an opaque material as the base layer, and greatly expanding the application range of the scratch-off structure.

[0034] In another embodiment, by mass percentage, 1% to 10% of colored ink is mixed in the base oil 21, so that the graphic information of the information layer 20 is presented by the superposition of color and optical contrast, ensuring the stable presentation effect of the graphic information of the information layer.

[0035] Preferably, by mass percentage, the topcoat 22 contains 0.2% to 2% of silicone oil. By adding silicone oil to the topcoat 22, the adhesion between the covering layer 30 and the information layer 20 can be significantly reduced, enabling the user to easily remove the covering layer 30 in the high-gloss area by scratching.

[0036] It should be noted that the information layer 20 presents special graphic information by the optical contrast between the high-gloss area and the matte area. Therefore, except for the covering layer 30, no other coatings, such as a release layer, can be provided above the information layer 20. Otherwise, the matte area will be covered by this coating, resulting in the failure of the graphic information presentation of the information layer 20.

[0037] The covering layer 30 is laminated above the information layer 20. The covering layer 30 covers at least all the graphic information of the information layer 20. After the covering layer 30 dries, it can be removed by scratching. Since the graphic information in the information layer 20 is presented by optical contrast, a very thin ink layer of the covering layer 30 can completely eliminate this optical contrast.

[0038] Optionally, the color of the covering layer 30 includes but is not limited to white, red, yellow, blue, black, silver, gold or other colors.

[0039] Optionally, the covering layer 30 can be obtained by offset printing, gravure printing, screen printing or hot stamping.

[0040] Preferably, the covering layer 30 is obtained by ordinary offset printing or UV offset printing. By setting the covering layer 30 through offset printing, the setting efficiency of the covering layer 30 can be greatly improved and the process cost can be reduced.

[0041] The covering layer 30 is directly set on the information layer 20. Since the high-gloss area has a smooth outer surface, the adhesion of the covering layer 30 on the information layer 20 can be reduced. Therefore, when the user scratches the covering layer 30 above the high-gloss area, this part of the covering layer 30 can be scratched and removed. Please refer to Figure 3 , since the matte area has an uneven surface, when the user scratches the covering layer 30 above the matte area, the covering layer 30 ink above the micro-protrusions can be scratched and removed. However, on the one hand, the covering layer 30 ink between the micro-protrusions cannot be directly scratched by an object under the protection of the micro-protrusions; on the other hand, the lower side of this part of the covering layer 30 ink is in direct contact with the base oil 21 and adheres firmly, so it cannot be removed, and the remaining covering layer 30 ink will enhance the color of the graphic information of the information layer 20.

[0042] In another embodiment, please refer to Figure 4 , a graphic layer 40 is further provided between the base layer 10 and the information layer 20. The graphic layer 40 is printed with ordinary ink. The graphic layer 40 can be used as a non-confidential information presentation, which is beneficial to enrich the information content of the scratch-off structure.

[0043] For the above-mentioned scratch-off structure, the information layer 20 is obtained by reverse printing. The reverse printing process includes a base oil 21 and a top oil 22 that are stacked and mutually exclusive. In the part where the base oil 21 is set alone, the process surface is flat and shows a high-gloss area. In the overlapping part of the base oil 21 and the top oil 22, the process surface has many micro-protrusions and shows a matte area. The graphic information of the information layer 20 is presented by using the optical contrast between the high-gloss area and the matte area. Since the graphic information of the information layer 20 is not presented by color, it can be easily covered by the covering layer 30. When the consumer removes the covering layer 30 by scratching, the covering layer 30 in the high-gloss area can be completely removed because the contact surface is flat. The covering layer 30 in the matte area can only be partially removed because the contact surface is uneven. The remaining covering layer 30 ink between the micro-protrusions will enhance the color of the graphic information of the information layer 20, thus achieving an obvious scratch-off presentation effect.

[0044] The beneficial effects of the above-mentioned scratch-off structure include: (1) Since the graphic information of the information layer 20 is presented through optical contrast and there is no substantial color to be covered, only a very thin covering layer 30 can achieve an ideal covering effect, and the setting of the covering layer 30 can be achieved at low cost through offset printing. (2) After the covering layer 30 is set, the optical contrast between the high-gloss area and the matte area can be completely eliminated. Therefore, even if the base layer 10 is very thin, it is impossible to view through backlighting, and the confidentiality is strong. (3) After the covering layer 30 is removed, the remaining covering layer 30 can enhance the color of the graphic information in the matte area.

[0045] For the preparation method of the scratch-off structure of an embodiment, please refer to Figure 5 , including the following steps:

[0046] S10: Set the information layer 20, and the information layer 20 is obtained by reverse printing.

[0047] In this embodiment, the information layer 20 is directly set on the base layer 10.

[0048] In another embodiment, a graphic layer 40 is further provided between the information layer 20 and the base layer 10. The information layer 20 is obtained by reverse printing, and the reverse process can be a water-based reverse process or a UV reverse process.

[0049] S20: Set the covering layer 30 on the information layer 20, and the covering layer can be scratched and removed.

[0050] The covering layer 30 can be set by means of offset printing, screen printing, gravure printing, flexographic printing, hot stamping, etc.

[0051] Preferably, the covering layer 30 is obtained by offset printing, and offset printing has the characteristics of high efficiency and low cost.

[0052] Optionally, the color of the covering layer 30 can be white, black, red, yellow, blue or other colors.

[0053] The following are specific embodiments.

[0054] Example 1

[0055] Please refer to Figures 1 - 3 , this embodiment provides a scratch-off structure, including a base layer 10, an information layer 20 and a covering layer 30 which are sequentially stacked. The information layer 20 is obtained by water-based reverse printing, and the covering layer 30 can be scratched and removed. The reverse process includes an undercoat 21 and a topcoat 22 which are stacked and mutually exclusive.

[0056] In this embodiment, the base oil 21 is a reverse base oil with the model number WOF1018 provided by Shenzhen Aicai Technology Co., Ltd., and the topcoat 22 is a water-based reverse topcoat with the model number UVF-207 provided by Shenzhen Aicai Technology Co., Ltd. The water-based reverse process is obtained through offset printing, and the covering layer 30 is printed with ordinary offset printing ink.

[0057] For the above-mentioned scratch-off structure, the information layer 20 is obtained by reverse printing. The reverse printing process includes a base oil 21 and a topcoat 22 that are stacked and mutually exclusive. In the part where the base oil 21 is set alone, the surface of the process is flat, showing a high-gloss area. In the overlapping part of the base oil 21 and the topcoat 22, the surface of the process has many micro-protrusions, showing a matte area. The graphic information of the information layer 20 is presented by using the optical contrast between the high-gloss area and the matte area. Since the graphic information of the information layer 20 is not presented by color, it can be easily covered by the covering layer 30. When the consumer removes the covering layer 30 by scratching, the covering layer 30 in the high-gloss area can be completely removed because the contact surface is flat, and the covering layer 30 in the matte area can only be partially removed because the contact surface is uneven. The covering layer 30 ink remaining between the micro-protrusions will enhance the color of the graphic information of the information layer 20, thus achieving an obvious scratch-off presentation effect.

[0058] This embodiment also provides a preparation method for the scratch-off structure. The preparation method includes the following steps:

[0059] S10. Set the information layer on the substrate layer. The information layer is obtained by reverse printing.

[0060] S20. Set the covering layer on the information layer. The covering layer can be scratched off.

[0061] Embodiment 2

[0062] The scratch-off structure provided in this embodiment is similar to the scratch-off structure provided in Embodiment 1, except that: by mass percentage, the topcoat 22 contains 0.2% of water-based silicone oil.

[0063] For the above-mentioned scratch-off structure, by adding silicone oil to the topcoat 22, the adhesion between the covering layer 30 and the information layer 20 can be significantly reduced, so that the user can easily remove the covering layer 30 in the high-gloss area by scratching.

[0064] Embodiment 3

[0065] Please refer to Figure 4 , this embodiment provides a scratch-off structure, which includes a base layer 10, a graphic layer 40, an information layer 20, and a covering layer 30 that are sequentially stacked. The graphic layer 40 is printed with ordinary ink, the information layer 20 is obtained by UV reverse printing, and the covering layer 30 can be scratched off. The reverse printing process includes a base oil 21 and a topcoat 22 that are stacked and mutually exclusive.

[0066] In this embodiment, the base oil 21 of the reverse process is a UV reverse base oil with the model number 75-600210-1.1190 provided by Sun Chemical (Shanghai) Ink Co., Ltd., and 1% of UV black ink is additionally added to the base oil 21. The topcoat 22 is a reverse topcoat with the model number 85-601390-9.2710 provided by Sun Chemical (Shanghai) Ink Co., Ltd. The covering layer 30 is ordinary offset printing ink.

[0067] For the above-mentioned scratch-off structure, by adding colored ink to the base oil 21, the graphic information of the information layer 20 is presented through the superposition of color and optical contrast, which can ensure the stable presentation effect of the graphic information of the information layer 20.

[0068] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A scratching structure, characterized in that, It includes a base layer, an information layer and a covering layer which are sequentially stacked. The information layer is obtained by reverse printing, and the covering layer can be removed by scratching.

2. The scratch structure according to claim 1, wherein The reverse printing process includes an undercoat and a topcoat which are stacked, and the topcoat and the undercoat repel each other.

3. The scratch-off structure according to claim 2, wherein The undercoat is an offset reverse undercoat, and the topcoat is an aqueous reverse varnish.

4. The scratch-off structure according to claim 2, characterized in that, The undercoat is a UV reverse undercoat, and the topcoat is a UV reverse varnish.

5. The scratch-off structure according to claim 3 or 4, characterized in that, By mass percentage, the topcoat contains 0.2% - 2% of silicone oil.

6. The scratch-off structure according to claim 5, wherein The covering layer is obtained by offset printing.

7. The scratch-off structure according to claim 6, characterized in that, A graphic layer is further provided between the base layer and the information layer.

8. The scratch-off structure according to claim 5, wherein, Both the undercoat and the topcoat are transparent.

9. The scratch-off structure according to claim 5, characterized in that, By mass percentage, 1% - 10% of colored ink is mixed in the undercoat.

10. A preparation method of a scratch-off structure, characterized in that, It includes the following steps: Set the information layer, which is obtained by reverse printing; Set the covering layer on the information layer, and the covering layer can be removed by scratching.

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