Black PET heat-resistant smart card and its improved cutting method and application

Abstract

The present invention relates to a dark-colored smart card without white edges and burrs and an improved cutting method and application thereof, which belongs to the technical field of smart card preparation, and solves the problem of poor appearance of white edges and burrs around the bottom surface of the dark-colored smart card in the prior art. The present invention relates to an improved cutting method for dark-colored smart cards, which includes pasting a cutting protective film on the bottom surface of the card after lamination, and then cutting. The present invention adheres a layer of cutting protective film to the bottom surface of the card before cutting the laminated bulk material. During the cutting process, the cutting protective film and the mold are pulled, thereby avoiding the pulling between the protective film on the surface of the bulk material itself and the mold. The thickness of the cutting protective film is obtained by theoretical calculation, and the black PET heat-resistant smart card no longer has white edges and burrs after cutting. The smart card prepared by the method of the present invention is applied to a car key card, which can meet the requirements of consumers for both the integrity of the appearance and the temperature resistance of the card.

Description

Technical Field

[0001] The invention relates to the technical field of smart card preparation, and in particular to a dark-colored smart card without white edges or burrs and an improved cutting method and application thereof. Background Art

[0002] At a time when new energy vehicles are developing vigorously, car key cards are favored by many car manufacturers due to their intelligence and portability. The overall appearance and temperature resistance of the card are also of concern to many car manufacturers. Dark smart cards have emerged, and the most widely used are black PET heat-resistant smart cards; black PET heat-resistant smart cards contain a black PET printing material layer, which is made black by heat lamination and has good temperature resistance.

[0003] Due to the inherent properties of existing dark-colored smart cards, the existing preparation process will produce white edges around the bottom edge of the card after cutting, which greatly affects the integrity of the dark appearance of the smart card.

[0004] In view of the demand for temperature resistance, intelligence and good overall appearance of car key cards in the vigorously developing new energy vehicle field, it is urgently necessary to provide a method for preparing a dark-colored smart card without white edges and burrs, so as to overcome the problems of white edges and burrs in existing dark-colored smart cards and meet consumers' demand for temperature resistance, good overall appearance and scratch resistance of smart cards. Summary of the invention

[0005] In view of the above analysis, the embodiments of the present invention aim to provide a dark-colored smart card without white edges or burrs and an improved cutting method and application thereof, so as to solve the problem of poor appearance caused by the presence of white edges and burrs around the rear bottom surface of existing dark-colored smart cards.

[0006] In a first aspect, an embodiment of the present invention provides a method for cutting a dark-colored smart card without white edges or burrs, the method comprising pasting a cutting protective film on the bottom surface of the card after lamination, and cutting.

[0007] Furthermore, the cut protection film is a PVC film.

[0008] Furthermore, the adhesive strength of the gun-cut protective film on the bulk material is 1-80g / 25mm.

[0009] Furthermore, the thickness of the blasting protective film is 0.04-0.2 mm.

[0010] Furthermore, the thickness of the bulk material is 0.7-1.1 mm.

[0011] Furthermore, the total thickness of the bulk material and the gun-cut protective film is less than 1.3 mm.

[0012] Furthermore, the bulk material includes an INLAY layer located in the middle layer, and a dark printing layer and a PVC surface protection film layer sequentially arranged on both sides of the INLAY layer, wherein the dark printing layer is a black PET printing layer.

[0013] Furthermore, the bulk material also includes a varnish layer, which is attached to a single-sided or double-sided PVC surface protective film layer; the varnish layer has a thickness of 5-20 μm, and the blast-cut protective film has a thickness of 0.02-0.1 mm.

[0014] Furthermore, the gun cutting pressure is 100kg-7t.

[0015] In a second aspect, an embodiment of the present invention provides a dark-colored smart card, which is manufactured by the method described in the first aspect.

[0016] In a third aspect, an embodiment of the present invention provides an application of a dark-colored smart card in a car key card, wherein the dark-colored smart card is the dark-colored smart card described in the second aspect.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] 1. The method of the present invention first adheres the cutting protection film on the bottom surface of the lamination of the large material, and then performs the cutting of the smart card, which can prevent the PVC surface protection film layer on the bottom surface of the large material from being pulled with the cutting die of the cutting card during cutting, resulting in white edges or even burrs. Figure 1 It can be seen that the black PET heat-resistant smart card prepared by the method of the present invention has no white edges or burrs around the card surface.

[0019] 2. Considering that after the cutting protection film is adhered to the bottom surface of the gun clamp of the bulk material, the gun clamp line printed on the bulk material can still be identified, and the overall thickness should not be too thick to prevent the gun clamp from being increased after lamination, the composition and thickness of the cutting protection film are limited in the present invention. The cutting protection film in the present invention can be a PVC film with a thickness between 0.04-0.2mm.

[0020] 3. The present invention has a varnish layer attached to the surface protection film layer of the smart card. Compared with the surface protection film layer material, the hardness of the outermost varnish material is greater. During the card cutting process, it can not only further avoid the appearance of white edges and burrs around the card surface, but also enhance the scratch resistance and abrasion resistance of the finished card surface, thereby meeting consumers' requirements for the temperature resistance, appearance integrity and scratch resistance of the smart card.

[0021] 4. The dark-colored smart card prepared by the method of the present invention is applied to a car key card, which is not only easy to carry, heat-resistant and scratch-resistant, but also has a good overall appearance, no white edges and burrs, and a good hand feel.

[0022] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0024] Figure 1 The figures are the physical pictures of the smart cards 1 and 2 made according to the embodiments 1 and 2 of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a smart card 2 made according to Example 2 of the present invention;

[0026] Figure 3 The physical pictures of smart cards 3-7 prepared in comparative examples 1-5 of the present invention;

[0027] Reference numerals:

[0028] 1-INLAY layer; 2-PET printing layer; 3-PVC protective film layer; 4-varnish layer. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0030] A specific embodiment of the present invention discloses a method for cutting a dark-colored smart card without white edges or burrs, the method comprising pasting a cutting protective film on the bottom surface of the card after lamination, and cutting the card.

[0031] It should be noted that the bulk material includes an INLAY layer located in the middle layer and a dark printing layer and a surface protection film layer sequentially arranged on both sides of the INLAY layer. The present invention adopts a conventional method to achieve the preparation of the bulk material. Among them, the printing layer substrate can be one of PET, PVC, PC, and ABS. In order to improve the heat resistance of the smart card, in a preferred embodiment of the present invention, a black PET heat-resistant material is used; the material constituting the surface protection film layer is PVC.

[0032] Due to the inherent properties of existing dark-colored smart cards, using existing preparation processes, white edges will be produced around the edges of the lower surface of the card after the card is cut. This greatly affects the overall appearance of the dark-colored smart card.

[0033] The applicant of the present invention discovered during research that the reason why white edges are generated around the lower edge of the card surface after the card is cut is that the PVC surface protective film layer on one side of the large material is pulled by the cutter die during the cut. After observation with a microscope, it was determined that the white edge phenomenon is caused by the pulling of the PVC surface protective film layer on one side of the large material with the cutter die during the cut. The root cause is that there is a gap between the cutter die and the matching die. After the lower edge of the card is cut, the cutter die performs a buffering and deceleration motion. In addition, the cutter die itself has a limited sharpness, which causes the edge of the PVC film on the lower surface of the large material to be pulled by the cutter die. Against the background of a dark background, an "obvious" whitening phenomenon will appear.

[0034] Based on the above findings, in the method for cutting smart cards provided by the present invention, a cutting protective film is first bonded to the bottom surface of the card after lamination, and then the smart card is cut. Unlike the existing smart cards, which have a PVC surface protection film layer as the outermost layer during cutting, the smart card of the present invention has a cutting protective film as the outermost layer during cutting. Therefore, after cutting the lower edge of the card, due to the gap between the card cutting mold and the matching mold, and the limited sharpness of the cutting mold itself, the edge of the cutting protective film and the cutting mold are pulled, thereby avoiding the pulling between the PVC surface protection film layer and the cutting mold. After the card is cut, the cutting protective film is torn off the card to obtain a dark-colored smart card without white edges and burrs. Figure 1 It can be seen that the black PET heat-resistant smart card prepared by the method of the present invention has no white edges or burrs around the card surface.

[0035] It should be noted that the lamination refers to the process of positioning and binding the INLAY layer, the printed printing layer substrate, and the PVC surface protection film layer on a binding machine during the preparation of the smart card, and then the bound bulk material is put into the laminating machine together with the laminated steel plate for lamination.

[0036] Furthermore, during lamination, silicone pads or felt pads can be used inside the steel plate outside every ten layers of bulk material, one on the top and one on the bottom, to ensure the buffering of lamination pressure and uniform temperature transfer.

[0037] It should be noted that the molten protective film of the present invention is a PVC film.

[0038] It should be noted that the method of pasting the cutting protection film on the bottom surface of the gun clamp of the large material after lamination can use a laminating machine, and the laminating machine can cut the rolled cutting protection film according to the size of the large material after laminating. The bonding strength of the cutting protection film on the large material should be such that it is easy to tear it apart later and will not easily peel off when the gun clamp is used.

[0039] Specifically, the adhesive strength of the cutting protection film of the present invention on the bulk material is 1-80g / 25mm. If the viscosity is too high, it is not easy to fall off after the cutting is stuck; if the viscosity is too low, it is easy to fall off when the cutting is stuck, and the effect of removing the white edge cannot be achieved.

[0040] It should be noted that in order to ensure that the lance cutting mold and the outermost lance cutting protective film are not pulled during the lance cutting process, and to avoid pulling between the lance cutting mold and the surface protective film layer, the thickness of the lance cutting protective film needs to be limited.

[0041] Specifically, the thickness of the protective film for cutting of the present invention is 0.04-0.2 mm. If the thickness of the protective film for cutting is too thin, the downward pulling force of the mold when cutting the surface protective film cannot be well buffered during the cutting process of the surface protective film, and the edge of the surface protective film is easily pulled, resulting in the "white edge" phenomenon; if the thickness of the protective film for cutting is too thick, it will increase the difficulty of cutting.

[0042] It should be noted that in order to achieve a good overall appearance of the smart card, the present invention limits the thickness of the heat-resistant smart card. While ensuring the structural strength and durability of the smart card, it reduces the difficulty and accuracy of the cutting during the preparation of the smart card, avoids the appearance of white edges during the cutting process, and ensures that the surface of the smart card is uniformly dark from all angles and has no burrs around it.

[0043] Specifically, the thickness of the bulk material of the present invention is 0.7-1.1 mm.

[0044] Specifically, the total thickness of the bulk material and the gun-cut protective film is less than 1.3 mm.

[0045] It should be noted that in order to further prevent white edges and burrs from appearing around the bottom surface when the large material is stuck, the large material also includes a varnish layer, and the varnish layer is attached to the surface protection film layer on one side or both sides.

[0046] The present invention has a varnish layer attached to the surface protection film layer of the smart card. Compared with the surface protection film layer material, the hardness of the outermost varnish material is greater. During the card cutting process, it can not only further avoid the appearance of white edges and burrs around the card surface, but also enhance the scratch resistance and abrasion resistance of the finished card surface, thereby meeting consumers' requirements for the temperature resistance, appearance integrity and scratch resistance of the smart card.

[0047] It should be noted that the thickness of the varnish layer outside the surface protective film layer needs to be limited. On the one hand, the hardness of the varnish layer must be large enough to prevent the edge of the surface protective film under the card from being pulled by the cutting mold, resulting in white edges and / or burrs around the card; on the other hand, the thickness of the varnish layer should not be too large to prevent increasing the difficulty of cutting the card.

[0048] Specifically, the thickness of the varnish layer of the present invention is 5-20 μm. If the varnish layer is too thick, it will increase the difficulty of cutting the card; if the varnish layer is too thin, the edge of the lower surface protective film and the cutting mold will be pulled, resulting in white edges and / or burrs around the card.

[0049] It should be noted that the method for attaching a varnish layer on the surface protection film layer of the present invention is offset printing; the varnish is UV varnish.

[0050] It should be noted that, compared with the surface protection film layer without a varnish layer attached thereto, when a varnish layer is attached to the surface protection film layer, the thickness of the blister cut protective film is relatively thin, at 0.02-0.1 mm. When blister cut, a good appearance of the bottom surface of the smart card without white edges or burrs can be achieved.

[0051] It should be noted that the cutting pressure of the present invention is 100kg-7t, such as 100kg, 1t, 3t, 5t, 6t or 7t. If the cutting pressure is too high, the card or chip will be damaged by the impact; if the pressure is too low, the card will fail. The appropriate cutting pressure not only cuts the large material into small cards, but also ensures that the cutting protective film pasted on the large material will not fall off and be cut together, so that the edge of the cutting protective film is pulled with the cutting mold, avoiding the pulling between the cutting mold and the surface protective film layer, and truly achieving the effect of removing the white edge of the smart card.

[0052] In a second aspect, an embodiment of the present invention provides a dark-colored smart card, which is manufactured by the method described in the first aspect.

[0053] In a third aspect, an embodiment of the present invention provides an application of a dark-colored smart card in a car key card, wherein the dark-colored smart card is the dark-colored smart card described in the second aspect.

[0054] The black PET heat-resistant smart card prepared by the method of the present invention is applied to a car key card, which is not only easy to carry, heat-resistant and scratch-resistant, but also has a good overall appearance, no white edges and burrs, and a good hand feel.

[0055] The laminating machine model is PW1600, purchased from Puwei Company.

[0056] Example 1

[0057] The preparation method of the black PET heat-resistant smart card 1 comprises:

[0058] (1) A laminating machine is used to coat the bottom surface of the gun card of the bulk material with a PVC gun-cut protective film, wherein the bonding strength of the PVC gun-cut protective film on the bulk material is 55g / 25mm and the thickness is 0.08mm; the thickness of the bulk material is 1.1mm, and the bulk material includes an INLAY layer located in the middle layer and a printing layer and a PVC surface protective film layer sequentially arranged on both sides of the INLAY layer, and the printing layer is composed of a black PET heat-resistant material;

[0059] (2) At room temperature, the large material with the PVC cutting protective film pasted on the bottom surface of the cutting card obtained in step (1) is cut by cutting at a cutting pressure of 5t to obtain a black PET heat-resistant smart card 1.

[0060] The physical object of smart card 1 (card 1) is as follows Figure 1 As shown, from Figure 1 It can be seen that the bottom surface of the smart card prepared by the preparation method of Example 1 has no white edges or burrs with poor appearance.

[0061] Example 2

[0062] The preparation method of the black PET heat-resistant smart card 2 comprises:

[0063] (1) A laminating machine is used to coat the bottom surface of the gun card of the bulk material after lamination with a PVC gun cutting protective film, wherein the bonding strength of the PVC gun cutting protective film is 55g / 25mm and the thickness is 0.02mm; the thickness of the bulk material is 1.1mm, and the bulk material includes an INLAY layer located in the middle layer and a printing layer and a PVC surface protective film layer sequentially arranged on both sides of the INLAY layer, the printing layer is composed of a black PET heat-resistant material, and a UV varnish layer is attached to the PVC surface protective film layer on the bottom surface of the bulk material, and the thickness is 20μm. Figure 2 As shown;

[0064] (2) At room temperature, the large material obtained in step (1) with the PVC cutting protective film on the bottom surface of the cutting card is cut by cutting at a cutting pressure of 5t to obtain a black PET heat-resistant smart card 2.

[0065] From the physical picture of smart card 2 (card 2) Figure 1 ) It can be seen that the bottom surface of the smart card prepared by the preparation method of Example 2 has no white edges or burrs on the periphery of the bottom surface.

[0066] Comparative Example 1

[0067] A black PET heat-resistant smart card 3 is prepared by the same method as in Example 1, except that in step (1), no PVC cut protective film is pasted on the bottom surface of the card of the bulk material.

[0068] The physical picture of smart card 3 (card 3) is as follows Figure 3 As shown, from Figure 3It can be seen that the bottom surface of the smart card prepared by the preparation method of Comparative Example 1 has white edges around it, which is a poor appearance.

[0069] Comparative Example 2

[0070] The preparation method of the black PET heat-resistant smart card 4 comprises:

[0071] (1) A laminating machine is used to coat the bottom surface of the gun card of the bulk material after lamination with a PVC gun-cut protective film, wherein the PVC gun-cut protective film has a bonding strength of 55g / 25mm and a thickness of 0.02mm; the bulk material has a thickness of 1.1mm, and includes an INLAY layer located in the middle layer and a printing layer and a PVC surface protective film layer sequentially arranged on both sides of the INLAY layer, and the printing layer is composed of a black PET heat-resistant material;

[0072] (2) At room temperature, the large material obtained in step (1) with the PVC cutting protective film on the bottom surface of the cutting card is cut by cutting at a cutting pressure of 5t to obtain a black PET heat-resistant smart card 4.

[0073] Physical picture of smart card 4 (card 4) Figure 3 ) It can be seen that the bottom surface of the smart card prepared by the preparation method of Comparative Example 2 has white edges around it, which is a poor appearance.

[0074] Comparative Example 3

[0075] The preparation method of the black PET heat-resistant smart card 5 comprises:

[0076] (1) A laminating machine is used to coat the bottom surface of the gun card of the bulk material after lamination with a PVC gun-cut protective film, wherein the PVC gun-cut protective film has an adhesive strength of 55g / 25mm and a thickness of 0.08mm. The thickness of the bulk material is 1.3mm. The bulk material includes an INLAY layer located in the middle layer and a printing layer and a PVC surface protective film layer sequentially arranged on both sides of the INLAY layer. The printing layer is composed of a black PET heat-resistant material;

[0077] (2) At room temperature, the large material obtained in step (1) with the PVC cutting protective film on the bottom surface of the cutting card is cut by cutting at a cutting pressure of 5t to obtain a black PET heat-resistant smart card 5.

[0078] From the physical picture of smart card 5 (card 5) Figure 3 ) It can be seen that the bottom surface of the smart card prepared by the preparation method of Comparative Example 3 has white edges around it, which is a poor appearance.

[0079] Comparative Example 4

[0080] The preparation method of the black PET heat-resistant smart card 6 comprises:

[0081] (1) A laminating machine is used to coat the bottom surface of the gun card of the bulk material after lamination with a PVC gun-cut protective film, wherein the PVC gun-cut protective film has a bonding strength of 0.5g / 25mm and a thickness of 0.08mm; the bulk material has a thickness of 1.1mm, and includes an INLAY layer located in the middle layer and a printing layer and a PVC surface protective film layer sequentially arranged on both sides of the INLAY layer, and the printing layer is composed of a black PET heat-resistant material;

[0082] (2) At room temperature, the large material with the PVC cutting protective film pasted on the bottom surface of the cutting card obtained in step (1) is cut by cutting at a cutting pressure of 5t to obtain a black PET heat-resistant smart card 6.

[0083] From the physical picture of smart card 6 (card 6) Figure 3 ) It can be seen that the smart card prepared by the preparation method of Comparative Example 4 has white edges around the bottom surface, which is a poor appearance.

[0084] Comparative Example 5

[0085] The preparation method of the black PET heat-resistant smart card 7 comprises:

[0086] (1) A laminating machine is used to coat the bottom surface of the gun card of the bulk material after lamination with a PVC gun-cut protective film, wherein the PVC gun-cut protective film has a bonding strength of 55 g / mm and a thickness of 0.08 mm; the bulk material has a thickness of 1.1 mm, and includes an INLAY layer located in the middle layer and a printing layer and a surface protective film layer sequentially arranged on both sides of the INLAY layer, and the printing layer is composed of a black PET heat-resistant material;

[0087] (2) At room temperature, the bulk material obtained in step (1) with the PVC cutting protective film on the bottom surface of the cutting card is cut by cutting at a cutting pressure of 70 kg to obtain a dark PET heat-resistant smart card 7.

[0088] From the physical picture of smart card 7 (card 7) Figure 3 ) It can be seen that the bottom surface of the smart card 7 prepared by the preparation method of Comparative Example 5 has white edges around it, which is a poor appearance.

[0089] It can be seen from the embodiments of the present invention and the comparative examples that a layer of cutting protective film is coated on the bottom surface of the cutting card of the bulk material after lamination, which can prevent the appearance of white edges and burrs around the bottom surface of the black PET heat-resistant smart card during the cutting process; the cutting effect of the smart card is not only related to the thickness of the bulk material, but also to the composition and thickness of the cutting protective film, the adhesion strength on the bulk material and the cutting pressure; in addition, the outermost varnish layer of the bulk material also has a certain inhibitory effect on the appearance of white edges and burrs during the cutting process.

[0090] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for cutting a dark-colored smart card without white edges or burrs, characterized in that: The method comprises sticking a cutting protection film on the bottom surface of the gun card of the laminated bulk material, cutting the bulk material, and tearing off the cutting protection film; The bulk material includes an INLAY layer located in the middle layer, and a dark printing layer and a PVC surface protection film layer sequentially arranged on both sides of the INLAY layer; The adhesive strength of the gun-cut protective film on the bulk material is 1-80g / 25mm; The thickness of the bulk material is 0.7-1.1 mm; the total thickness of the bulk material and the gun-cut protective film is less than 1.3 mm; The cut protection film is pasted on the PVC surface protection film layer located on the bottom surface, or the bulk material further includes a varnish layer, the varnish layer is attached to the PVC surface protection film layer on one side or both sides, and the cut protection film is pasted on the varnish layer located on the bottom surface; Paste the cut protection film on the PVC surface protection film layer on the bottom surface, the thickness of the cut protection film is 0.04-0.2mm; Alternatively, the blast-cut protective film is pasted on the varnish layer on the bottom surface, the varnish layer has a thickness of 5-20 μm, and the blast-cut protective film has a thickness of 0.02-0.1 mm; The hardness of the varnish material of the varnish layer is greater than the hardness of the surface protection film layer material.

2. The method according to claim 1, characterized in that The cut protection film is a PVC film.

3. The method according to claim 1, characterized in that: The dark printing layer is a black PET printing layer.

4. The method according to any one of claim 1, characterized in that: The gun cutting pressure is 100kg-7t.

5. A dark-colored smart card, characterized in that: The smart card is made by the method according to any one of claims 1 to 4.

6. Application of a dark-colored smart card in a car key card, characterized in that: The dark-colored smart card is the dark-colored smart card described in claim 5.

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