Printing ink capable of being easily identified under X-ray as well as preparation method and application of printing ink

Abstract

The invention provides printing ink easy to identify under X-rays as well as a preparation method and application thereof. The printing ink comprises basic resin, an X-ray enhancer, pigment, a plasticizer and a solvent, through the synergistic effect of the components, especially the addition of the X-ray enhancer, on the premise of ensuring that the obtained printing ink has an excellent printing effect under visible light, the printing ink also has the characteristic of developing and imaging under X rays, is applied to express barcodes, does not need to disassemble a transfer package in the transfer process, and is convenient to use. The barcode information of each small package of the transfer package can be directly scanned through the X-ray machine, the barcode scanning recognition rate and accuracy can be remarkably improved, and higher working efficiency and lower operation cost are brought to express transfer.

Description

Technical Field

[0001] The invention belongs to the technical field of inks, and in particular relates to a printing ink that is easily identifiable under X-rays, and a preparation method and application thereof. Background Art

[0002] With the rapid development of e-commerce, express delivery services are facing the challenge of a surge in the number of parcels, and extremely high requirements are placed on the processing capacity of the logistics system. At present, in order to improve the transit efficiency of express delivery, express delivery companies generally adopt the method of sub-packaging and transit, that is, packaging multiple small parcels into a transit package for unified transportation. During the packaging process, each transit package will be assigned a unique express barcode and bound to the barcode of the small parcel in the package for tracking and management. However, the traditional scanning method requires staff to manually open the transit package and scan the barcode of each small parcel in the transit package separately, which is not only inefficient, but also increases logistics costs and the risk of package damage.

[0003] At present, most of the barcodes on express packaging are prepared by printing process or inkjet printing technology with ink, and the ink is mainly composed of resin, pigment, binder and additives. For example, CN106675198A discloses a printing ink composition, which is made of the following raw materials by mass fraction: 4-8% chlorovinyl resin, 1-5% chlorinated polypropylene, 1-5% rosin resin, 58-70% butanone, 8-15% toluene, 8-15% butyl acetate, 5-10% solvent-based dye, 1-2% dibutyl phthalate, 1-2% adhesion promoter, and 0.2-0.5% paraffin; the printing ink composition provided by the invention uses chlorovinyl resin, chlorinated polypropylene and rosin resin as mixed resins, which can form a uniform and dense ink film to increase the alcohol resistance of the ink, and can also achieve good wetting on the PE substrate to improve the adhesion of the ink.

[0004] However, the printing inks provided in the prior art including the above invention cannot be developed and imaged under X-ray scanning.

[0005] Therefore, developing a printing ink that can be developed under X-rays and has high imaging visibility and recognition is still a technical problem that urgently needs to be solved in this field. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a printing ink that is easily identifiable under X-rays, and a preparation method and application thereof. The printing ink has the characteristics of developing images under X-rays without changing the basic printing properties of the ink. After being printed into an express barcode, the visibility and recognition of the barcode under X-ray scanning can be significantly improved, thereby greatly reducing logistics costs and the risk of package damage.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a printing ink that is easily identifiable under X-rays, the printing ink comprising a base resin, an X-ray intensifier, a pigment, a plasticizer and a solvent.

[0009] The printing ink provided by the present invention comprises a base resin, an X-ray enhancer, a pigment, a plasticizer and a solvent, wherein the addition of the base resin can ensure that the obtained printing ink has good adhesion and film-forming properties, and can be stably adsorbed on the surfaces of various express packaging materials; the X-ray enhancer has excellent blocking ability under X-rays, and by adding the X-ray enhancer, the obtained printing ink can have the characteristics of developing and imaging under X-rays without affecting the basic printing performance of the ink; the addition of the pigment can enhance the barcode contrast under visible light; the plasticizer can improve the flexibility and ductility of the ink, making it more suitable for printing on surfaces of different materials; the solvent can adjust the viscosity and drying speed of the printing ink, so that it supports the requirements of high-speed printing operations; through the synergistic effect of the above-mentioned components, it is ensured that the obtained printing ink not only has excellent printing effects under visible light, but also can show high-contrast images under X-rays.

[0010] The express barcode printed with the printing ink that is easily recognizable under X-ray provided by the present invention can significantly improve the visibility and recognition of the barcode under X-ray scanning. Further, when the transfer package arrives at the transfer center, there is no need to unpack the transfer package, and the barcode information of each small package in the package can be directly scanned by an X-ray machine, so as to quickly and accurately grasp the package situation in the transfer package, which not only greatly saves the time cost of manual unpacking and re-inspection, but also effectively reduces the risk of wrong delivery, missing delivery and loss due to human operational errors, bringing higher work efficiency and lower operating costs to the transfer center of the express company.

[0011] Preferably, the printing ink comprises the following components in parts by weight:

[0012]

[0013] The base resin may be used in an amount of 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight or 40 parts by weight.

[0014] The amount of the X-ray enhancer can be 20 parts by weight, 22 parts by weight, 24 parts by weight, 26 parts by weight, 28 parts by weight, 30 parts by weight, 32 parts by weight, 34 parts by weight, 36 parts by weight, 38 parts by weight or 40 parts by weight, etc.

[0015] The amount of the pigment can be 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight or 20 parts by weight, etc.

[0016] The amount of the plasticizer can be 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight or 8 parts by weight.

[0017] The amount of the solvent used can be 5 parts by weight, 7 parts by weight, 9 parts by weight, 11 parts by weight, 13 parts by weight, 15 parts by weight, 17 parts by weight, 19 parts by weight, 21 parts by weight, 23 parts by weight or 25 parts by weight, etc.

[0018] Preferably, the average particle size of the X-ray enhancer is 1 to 10 μm, for example, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm.

[0019] As a preferred technical solution of the present invention, limiting the average particle size of the X-ray enhancer to the above range can further optimize its dispersibility and stability in the printing ink, and further improve the contrast and clarity of the image formed into a barcode under X-ray scanning after the obtained printing ink is made.

[0020] Preferably, the X-ray enhancing agent comprises bismuthate.

[0021] As a preferred technical solution of the present invention, the bismuthate is selected as the X-ray enhancer, and its high atomic number and density are utilized to give it excellent blocking ability under X-rays.

[0022] Preferably, the bismuthate salt includes calcium bismuthate and / or barium bismuthate, and more preferably barium bismuthate.

[0023] Preferably, the base resin comprises acrylic resin.

[0024] Preferably, the average particle size of the pigment is 20 to 50 nm, for example, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm or 50 nm.

[0025] As a preferred technical solution of the present invention, limiting the average particle size of the pigment to the above range can further optimize the color intensity and dispersibility of the resulting printing ink and enhance the image contrast of the barcode under visible light.

[0026] In the present invention, there is no special requirement for the selection of the pigment, and conventional pigments in the art may be selected; illustratively, the pigment includes carbon black.

[0027] Preferably, the plasticizer comprises a phthalate.

[0028] Preferably, the solvent comprises isopropanol.

[0029] Preferably, the printing ink also includes a dispersant.

[0030] As a preferred technical solution of the present invention, the addition of the dispersant can prevent the aggregation of fillers such as pigments and X-ray enhancers by virtue of its excellent water solubility and excellent dispersibility.

[0031] Preferably, the content of the dispersant in the printing ink is 2 to 8 parts by weight, for example, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight or 8 parts by weight.

[0032] In the present invention, there is no special requirement for the selection of the dispersant, and a conventional dispersant in the art may be selected; illustratively, the dispersant includes polyvinyl alcohol.

[0033] Preferably, the printing ink also includes an antioxidant.

[0034] As a preferred technical solution of the present invention, the addition of the antioxidant can protect the organic components in the printing ink, prevent oxidative degradation, and extend the service life of the printing ink.

[0035] Preferably, the content of the antioxidant in the printing ink is 2 to 8 parts by weight, for example, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight or 8 parts by weight.

[0036] In the present invention, there is no special requirement for the selection of the antioxidant, and a conventional antioxidant in the art may be selected. Exemplarily, the antioxidant includes antioxidant 1010.

[0037] In a second aspect, the present invention provides a method for preparing a printing ink that is easily identifiable under X-rays as described in the first aspect, the preparation method comprising: mixing a base resin, an X-ray enhancer, a pigment, a plasticizer, a solvent, an optional dispersant and an optional antioxidant, and grinding to obtain the printing ink that is easily identifiable under X-rays.

[0038] In a second aspect, the present invention provides a use of a printing ink that is easily identifiable under X-rays as described in the first aspect in preparing an express barcode.

[0039] In a third aspect, the present invention provides an express packaging material, on which is provided an express barcode printed using the printing ink that is easily identifiable under X-rays as described in the first aspect.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The printing ink that is easily identifiable under X-rays provided by the present invention comprises a base resin, an X-ray intensifier, a pigment, a plasticizer and a solvent; through the synergistic effect of the above-mentioned components, in particular, by adding the X-ray intensifier, it is ensured that the obtained printing ink has the characteristics of developing and imaging under X-rays on the premise of having excellent printing effect under visible light, and is applied to express bar codes. During transportation, there is no need to disassemble the transportation package, and the bar code information of each small package in the transportation package can be directly scanned by an X-ray machine, which can significantly improve the scanning recognition rate and accuracy of the bar code, and bring higher work efficiency and lower operating costs to express transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A physical image of a single package provided with a barcode formed by the printing ink provided in Example 1 under X-ray;

[0043] Figure 2 A physical image of a single package provided with a barcode formed by the printing ink provided in Example 1 under visible light;

[0044] Figure 3 A physical picture of a package under X-ray consisting of multiple individual packages with bar codes formed by the printing ink provided in Example 1. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0046] The following specific implementation methods involve some raw material information as follows:

[0047] (1) Acrylic resin: purchased from BASF, model number is Joncryl 922;

[0048] (2) Barium bismuthate: average particle size is 5 μm;

[0049] (3) Calcium bismuthate: average particle size is 6 μm;

[0050] (4) Carbon black: average particle size is 32 nm;

[0051] Other raw materials involved are conventional materials in this field and can be purchased from commercial products.

[0052] Example 1

[0053] A printing ink that is easily identifiable under X-ray, the components and amounts thereof are shown in Table 1:

[0054] Table 1

[0055] Components substance Dosage / weight Base resin Acrylic resin 30 X-ray intensifier Barium Bismuthate 30 pigment Carbon Black 18 Plasticizers Phthalates 5 Solvent Isopropyl alcohol 10 Dispersants Polyvinyl alcohol 5 Antioxidants Antioxidant 1010 5

[0056] The method for preparing the printing ink that is easily identifiable under X-ray provided in Example 1 comprises the following steps:

[0057] Acrylic resin, barium bismuthate, carbon black, phthalate, isopropyl alcohol, polyvinyl alcohol and antioxidant 1010 were mixed uniformly at a rotation speed of 800 rpm, and then ground with a grinder to obtain the printing ink that is easily identifiable under X-ray.

[0058] Performance Testing:

[0059] The printing ink provided in Example 1, which is easily identifiable under X-ray, is inkjet printed on express packaging materials to form a barcode. The actual image of a single package provided with the obtained barcode under X-ray is as follows: Figure 1 As shown, a single package with the obtained barcode under visible light is shown in FIG. Figure 2 As shown in the figure, the actual picture of a package containing multiple individual packages under X-ray is as follows Figure 3 As shown;

[0060] from Figure 1 to Figure 3 It can be seen that the barcode formed by the printing ink provided in Example 1 can be developed and imaged under X-ray, and the image can show high contrast and recognition. At the same time, it also has excellent printing effect under visible light, and the barcode graphic is very clear.

[0061] Example 2

[0062] A printing ink that is easily identifiable under X-ray, the components and amounts thereof are shown in Table 2:

[0063] Table 2

[0064] Components substance Dosage / weight Base resin Acrylic resin 25 X-ray intensifier Calcium Bismuthate 20 pigment Carbon Black 19 Plasticizers Phthalates 6 Solvent Isopropyl alcohol 15 Dispersants Polyvinyl alcohol 4 Antioxidants Antioxidant 1010 6

[0065] The method for preparing the printing ink that is easily identifiable under X-ray provided in Example 2 comprises the following steps:

[0066] Acrylic resin, calcium bismuthate, carbon black, phthalate, isopropyl alcohol, polyvinyl alcohol and antioxidant 1010 were uniformly mixed at a rotation speed of 800 rpm, and then ground with a grinder to obtain the printing ink that is easily identifiable under X-ray.

[0067] Performance Testing:

[0068] Similarly, the printing ink that is easily recognizable under X-ray provided in Example 2 is inkjet printed on an express packaging material made of PE material to form a barcode, and the actual image of the obtained barcode under X-ray and the actual image under visible light are observed; it can be found that the printing ink provided in Example 2 can also be developed and imaged under X-ray after being made into a barcode, and the image also shows high contrast and recognition, and also has excellent printing effect under visible light.

[0069] Example 3

[0070] A printing ink that is easily identifiable under X-ray, the components and amounts thereof are shown in Table 3:

[0071] Table 3

[0072]

[0073] The method for preparing the printing ink that is easily identifiable under X-ray provided in Example 3 comprises the following steps:

[0074] Acrylic resin, barium bismuthate, calcium bismuthate, carbon black, phthalate, isopropyl alcohol, polyvinyl alcohol and antioxidant 1010 are uniformly mixed at a rotation speed of 800 rpm, and then ground with a grinder to obtain the printing ink that is easily identifiable under X-ray.

[0075] Performance Test:

[0076] Similarly, the printing ink that is easily recognizable under X-ray provided in Example 3 is inkjet printed on an express packaging material made of PE material to form a barcode, and the actual image of the obtained barcode under X-ray and the actual image under visible light are observed; it can be found that the printing ink provided in Example 3 can also be developed and imaged under X-ray after being made into a barcode, and the image also shows high contrast and recognition, and also has excellent printing effect under visible light.

[0077] Example 4

[0078] A printing ink that is easily identifiable under X-ray, the components and amounts thereof are shown in Table 4:

[0079] Table 4

[0080] Components substance Dosage / weight Base resin Acrylic resin 30 X-ray intensifier Barium Bismuthate 30 pigment Carbon Black 18 Plasticizers Phthalates 5 Solvent Isopropyl alcohol 10 Antioxidants Antioxidant 1010 5

[0081] The method for preparing the printing ink that is easily identifiable under X-ray provided in Example 4 comprises the following steps:

[0082] Acrylic resin, barium bismuthate, carbon black, phthalate, isopropyl alcohol and antioxidant 1010 were mixed uniformly at a rotation speed of 800 rpm, and then ground with a grinder to obtain the printing ink that is easily identifiable under X-rays.

[0083] Performance Test:

[0084] Similarly, the printing ink that is easily recognizable under X-ray provided in Example 4 is inkjet printed on an express packaging material made of PE material to form a barcode, and the actual image of the obtained barcode under X-ray and the actual image under visible light are observed; it can be found that the printing ink provided in Example 4 can be developed into an image under X-ray after being made into a barcode, but the contrast of the image is low, and it is difficult to identify, and the printing effect under visible light is slightly poor, and the pattern is slightly blurred.

[0085] Comparative Example 1

[0086] A printing ink, the components and amounts thereof are shown in Table 5:

[0087] Table 5

[0088]

[0089]

[0090] The preparation method of the printing ink provided in Comparative Example 1 comprises the following steps:

[0091] Acrylic resin, carbon black, phthalate, isopropyl alcohol, polyvinyl alcohol and antioxidant 1010 were uniformly mixed at a rotation speed of 800 rpm, and then ground with a grinder to obtain the printing ink.

[0092] Performance Test:

[0093] Similarly, the printing ink provided in Comparative Example 1 was inkjet printed on an express packaging material made of PE to form a barcode, and the actual image of the obtained barcode under X-ray and the actual image under visible light were observed; it can be found that the barcode obtained in Comparative Example 1 has a high contrast under visible light and an excellent printing effect, but has no development effect under X-ray and cannot be developed into an image.

[0094] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate a printing ink that is easily identifiable under X-rays and its preparation method and application, but the present invention is not limited to the above-mentioned process steps, that is, it does not mean that the present invention must rely on the above-mentioned process steps to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A printing ink that is easily identifiable under X-ray, characterized in that: The printing ink comprises a base resin, an X-ray intensifier, a pigment, a plasticizer and a solvent.

2. The printing ink easily identifiable under X-ray according to claim 1, characterized in that: The printing ink comprises the following components in parts by weight:

3. The printing ink easily identifiable under X-ray according to claim 1 or 2, characterized in that: The average particle size of the X-ray enhancer is 1 to 10 μm; Preferably, the X-ray enhancing agent comprises bismuthate; Preferably, the bismuthate salt comprises calcium bismuthate and / or barium bismuthate.

4. The printing ink easily identifiable under X-ray according to any one of claims 1 to 3, characterized in that: The base resin includes acrylic resin.

5. The printing ink easily identifiable under X-ray according to any one of claims 1 to 4, characterized in that: The average particle size of the pigment is 20 to 50 nm; Preferably, the pigment comprises carbon black.

6. The printing ink easily identifiable under X-ray according to any one of claims 1 to 5, characterized in that: The plasticizer includes phthalates; Preferably, the solvent comprises isopropanol.

7. The printing ink easily identifiable under X-ray according to any one of claims 1 to 6, characterized in that: The printing ink also includes a dispersant; Preferably, the content of the dispersant in the printing ink is 2 to 8 parts by weight; Preferably, the dispersant comprises polyvinyl alcohol; Preferably, the printing ink further comprises an antioxidant; Preferably, the content of the antioxidant in the printing ink is 2 to 8 parts by weight; Preferably, the antioxidant comprises antioxidant 1010 .

8. A method for preparing a printing ink that is easily identifiable under X-rays as claimed in any one of claims 1 to 7, characterized in that: The preparation method comprises: mixing a base resin, an X-ray intensifier, a pigment, a plasticizer, a solvent, an optional dispersant and an optional antioxidant, and grinding the mixture to obtain the printing ink that is easily identifiable under X-rays.

9. Use of a printing ink that is easily identifiable under X-rays as claimed in any one of claims 1 to 7 in the preparation of express barcodes.

10. A courier packaging material, characterized in that: The express packaging material is provided with an express barcode printed using the printing ink that is easily identifiable under X-rays as described in any one of claims 1 to 7.

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