Super-hydrophobic label

Abstract

The utility model discloses a super-hydrophobic label which comprises a base material (2), and a bottom coating (3), a surface coating (5), an ink layer (6) and a super-hydrophobic layer (7) are sequentially arranged on the base material (2). The super-hydrophobic layer (7) comprises an adhesive and nano particles, and the nano particles are one or combination of nano calcium carbonate and nano silicon dioxide; the nanoparticles are attached to the interior and / or the surface of the adhesive; the thickness of the super-hydrophobic layer (7) is 2.0 + / -0.5 [mu] m, and the particle size of nano particles is 20-100 nm. The adhesive is rosin or vulcanized silicone rubber. The label is reasonable in structural design, the label has the advantages of self-cleaning, wear resistance and good stability by arranging functional coatings such as the super-hydrophobic layer on the base material, and the service life of the label in severe environments such as outdoors is prolonged; the surface is not easy to wet through hydrophobicity, an environment required by bacteria cannot be provided, adhesion of the bacteria is greatly reduced, and certain antibacterial performance is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to label technical field, especially a kind of super-hydrophobic label. BACKGROUND

[0002] Super-hydrophobicity is generally referred to as water repellency and liquid droplets on the surface of the support are spherical, with a water contact angle of > 150° and a water roll-off angle of < 10°. Super-hydrophobic surfaces have excellent hydrophobicity, anti-fouling and self-cleaning properties, and are widely used in aerospace, medical materials, water transportation and automotive industries.

[0003] Labels are used as tools for conveying key information about products, helping consumers to quickly identify and classify products, and are used in various fields.

[0004] Labels are usually based on copper plate paper, card paper and other substrates. In practical applications, the surface is easily worn out, so the industry usually uses varnish to protect the surface layer to improve the wear resistance of the label. However, in harsh outdoor environments, the protective ability of varnish is insufficient, and the label can be contaminated by dust, oil stains and packaging contents, and is easily soaked and damaged, making it difficult to identify the label information, and unable to meet the needs of long-term use in harsh environments.

[0005] After research and testing, using a super-hydrophobic coating to replace the varnish layer of the label can better protect the substrate, solve the problem of traditional labels being easily contaminated and difficult to clean, and have the advantages of self-cleaning, wear resistance and good stability, which can better meet the needs of use in harsh outdoor environments.

[0006] Therefore, there is an urgent need to design a super-hydrophobic label with the advantages of self-cleaning, wear resistance and good stability to improve the service life of the label in harsh outdoor environments. INVENTION CONTENTS

[0007] The technical solution adopted by the utility model is as follows:

[0008] A super-hydrophobic label includes a substrate (2), characterized in that a primer layer (3), a topcoat layer (5), an ink layer (6) and a super-hydrophobic layer (7) are sequentially arranged on the substrate (2).

[0009] The super-hydrophobic layer (7) includes an adhesive and nanoparticles, the adhesive is rosin or vulcanized silicone rubber, and the nanoparticles are one or a combination of nano-calcium carbonate and nano-silicon dioxide.

[0010] The nanoparticles are attached to the inside and / or surface of the adhesive.

[0011] The thickness of the super-hydrophobic layer (7) is 2.0 ± 0.5 μm, and the particle size of the nanoparticles is 20 nm-100 nm.

[0012] Preferably, the adhesive is rosin or vulcanized silicone rubber.

[0013] Preferably, the primer layer (3) is a water-based acrylic film with a thickness of 7±0.5 microns.

[0014] Preferably, the topcoat layer (5) is a water-based acrylic film or a water-based polyurethane film with a thickness of 3±0.5 microns.

[0015] Preferably, the ink layer (6) is a gravure printing ink layer with a thickness of 2.5±0.5 microns.

[0016] Preferably, the substrate (2) is one of 80-150g copper plate paper, 80-120g cardboard, or 45g-75g aluminum-coated base paper.

[0017] Preferably, an aluminum plating layer (4) is provided between the primer layer (3) and the topcoat layer (5).

[0018] Preferably, the aluminum plating layer (4) is a vacuum aluminum plating layer with a thickness of 280±40 angstroms.

[0019] Preferably, the substrate (2) is provided with a backcoat layer (1) on the side away from the primer layer (3).

[0020] Preferably, the backcoat layer (1) is a water-based acrylic film with a thickness of 2.5±0.7 microns.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] 1. The structure is reasonably designed, the functional coating such as the super-hydrophobic layer is arranged on the substrate, the label has the advantages of self-cleaning, wear resistance, and good stability, and the service life of the label in harsh environments such as outdoors is improved.

[0023] 2. The surface is not easily wetted by hydrophobicity, cannot provide the environment required by bacteria, greatly reduces the adhesion of bacteria, and has certain antibacterial performance. DETAILED DESCRIPTION

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Among them: backcoat layer 1, substrate 2, primer layer 3, aluminum plating layer 4, topcoat layer 5, ink layer 6, super-hydrophobic layer 7. DETAILED DESCRIPTION

[0026] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The drawings show the preferred embodiments of the utility model. However, the utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", and the like as used herein are for purposes of description only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] The utility model will be further described below in conjunction with the drawings and specific embodiments:

[0030] As Figure 1 Indicated, a kind of super-hydrophobic label, including substrate 2, sequentially arranged with primer layer 3, face coating 5, ink layer 6 and super-hydrophobic layer 7 on the substrate 2;

[0031] Super-hydrophobic layer 7 includes adhesive and nano-particle, the adhesive is rosin or vulcanized silicone rubber, the nano-particle is one or combination of nanometer calcium carbonate and nanometer silicon dioxide;

[0032] The nano-particle is attached to the inside and / or surface of adhesive;

[0033] The thickness of the super-hydrophobic layer 7 is 2.0±0.5 μm, and the particle size of nano-particle is 20nm-100nm.

[0034] In the embodiment, nano-particle constructs the micro-nano structure required by super-hydrophobic on the surface of super-hydrophobic layer, when droplet contacts the surface of super-hydrophobic layer, realizes super-hydrophobic and wear-resistant effect under the combined action of the air cushion formed by the micro-nano structure and the hydrophobic effect of nano material itself.

[0035] The present embodiment uses a super-hydrophobic coating to replace the gloss oil layer of the existing label, which can better protect the substrate, solve the problem of easy dirt and difficult cleaning of traditional labels, and has the advantages of self-cleaning, wear resistance and good stability, which can better meet the needs of use in harsh outdoor environments.

[0036] When the nanoparticles are attached to the inside of the adhesive, the nanoparticles near the superficial layer of the adhesive form a micro-nano structure on the surface after the adhesive is cured; the micro-nano structure formed by the nanoparticles attached to the surface can also obtain super-hydrophobic effect, but there is a certain difference in wear resistance.

[0037] In the present embodiment, rosin or XC-107 indoor vulcanized silicone rubber is used as an adhesive to fix nano calcium carbonate and nano silicon dioxide particles, which can obtain good wear resistance and stability, and can meet the needs of long-term use in harsh environments.

[0038] Further, the primer layer 3 is a water-based acrylic film, which protects the surface of the substrate, makes the substrate flat, and improves the adhesion and durability of the aluminum layer when plated with aluminum, with a thickness of 7±0.5μm.

[0039] The primer layer 3 protects the surface of the substrate, makes the substrate flat, and improves the adhesion and durability of the aluminum layer when plated with aluminum or needed.

[0040] Further, the topcoat layer 5 is a water-based acrylic film or a water-based polyurethane film, which mainly enhances the printability and wear resistance of the label, with a thickness of 3±0.5μm.

[0041] Further, the ink layer 6 is a gravure printing ink layer, with a thickness of 2.5±0.5μm.

[0042] The present embodiment uses solvent-based gravure ink to print the label content, and gravure printing as a printing process has the advantages of thick ink layer, bright color, high saturation, high printing plate resistance, stable print quality, and fast printing speed, which improves the quality of the label.

[0043] Further, the substrate 2 is one of 80-150g copper plate paper, 80-120g card paper, and 45g-75g aluminum-plated base paper.

[0044] Further, an aluminum plating layer 4 is provided between the primer layer 3 and the topcoat layer 5.

[0045] Further, the aluminum plating layer 4 is a vacuum aluminum plating layer with a thickness of 280±40 angstroms.

[0046] The aluminum plating layer 4 can improve the barrier property of the substrate, prevent the penetration of gas and water vapor, and enhance the metal luster of the product. The aluminum plating layer in the present embodiment is processed by vacuum aluminum plating, and the thickness of the aluminum layer is 280±40 angstroms.

[0047] Further, the substrate 2 is provided with a back coating layer 1 on the side away from the base coating layer 3.

[0048] Further, the back coating layer 1 is a water-based acrylic film with a thickness of 2.5±0.7 μm.

[0049] The back coating layer 1 is a water-based acrylic film, which serves to supplement the moisture of the substrate, makes the paper flat, and can avoid the adhesive of the label from penetrating into the substrate, thereby improving the stability of the substrate.

[0050] The way of attaching the nanoparticles to the adhesive has various forms, such as mixing the nanoparticles with the adhesive liquid and then coating, or coating the adhesive and then pressing the nanoparticles, etc. In this embodiment, the nanoparticles are attached by mixing the nanoparticles with the adhesive liquid and then coating, and the nanoparticles are attached to the inside and / or surface of the adhesive after the adhesive is solidified. According to the needs of the label use, the nanoparticles can be white or transparent, and the adhesive is generally transparent.

[0051] Through experiments, the suitable particle size of the nanoparticles and the thickness of the super-hydrophobic layer, and the ratio of the adhesive and the nanoparticles are the key to constructing the micro-nano structure of the surface of the super-hydrophobic layer. In this embodiment, the adhesive is 5 parts, the nanoparticles are 2 parts, and the thickness of the super-hydrophobic layer 7 is 2.0±0.5 μm, and the particle size of the nanoparticles is 20 nm-100 nm.

[0052] After the adhesive is solidified into a film, the super-hydrophobic coating layer is tested, and the test results are as follows:

[0053] 1. The water contact angle and the water rolling angle of the super-hydrophobic layer 7 are measured by using a contact angle measuring instrument (CA100B): the water contact angle reaches 155.5°, and the water rolling angle reaches 3°. The micro-nano structure provided by the combination of the nanoparticles and the adhesive makes the super-hydrophobic layer reach the best super-hydrophobic effect. The best coating layer thickness for the wear-resistant and hydrophobic performance is 1.5-2.5 μm, which is measured by using a thickness measuring instrument (CHY-C2A).

[0054] 2. The wear resistance of the coating layer is tested by using a friction tester (RT-01): according to the speed of 43±2 times / min, the stroke is 60 mm, the standard load block is 20N±0.2N, and the test is performed by setting the friction frequency. When the wear resistance is 500±10 times, the water contact angle is greater than 150°, the water rolling angle is less than 10°, and the surface still has the super-hydrophobic state, which is 2.5 times of the existing gloss oil wear resistance (200 times). It shows that the coating layer has good mechanical stability and durability, which is due to the fact that the micro-nano particles are firmly attached to the inside and / or surface of the adhesive, thereby improving the wear resistance. Even if the surface structure is worn, the nanoparticles embedded in the adhesive layer can still maintain a certain super-hydrophobicity, which can well adapt to the needs of outdoor and other harsh environments, and improve the service life of the label.

[0055] The super-hydrophobic label surface is not easy to be wetted, cannot provide the environment required by bacteria, greatly reduces the adhesion of bacteria, and has certain antibacterial performance.

[0056] For those skilled in the art, other various corresponding changes and transformations can be made according to the technical solutions and concepts described above, and all these changes and transformations should belong to the protection scope of the patent claims of the utility model.

Claims

1. A superhydrophobic label comprising a substrate (2), characterized in that: The substrate (2) is sequentially provided with a primer layer (3), a topcoat layer (5), an ink layer (6) and a super-hydrophobic layer (7); The super-hydrophobic layer (7) comprises an adhesive and nanoparticles, wherein the nanoparticles are one or a combination of nano calcium carbonate and nano silicon dioxide; The nanoparticles are attached to the inside and / or surface of the adhesive; The thickness of the super-hydrophobic layer (7) is 2.0±0.5μm, and the particle size of the nanoparticles is 20nm-100nm.

2. The superhydrophobic label of claim 1, wherein: The adhesive is rosin or vulcanized silicone rubber.

3. The superhydrophobic label of claim 1, wherein: The primer layer (3) is a water-based acrylic film with a thickness of 7±0.5μm.

4. The superhydrophobic label of claim 1, wherein: The topcoat layer (5) is a water-based acrylic film or a water-based polyurethane film with a thickness of 3±0.5μm.

5. The superhydrophobic label of claim 1, wherein: The ink layer (6) is a gravure printing ink layer with a thickness of 2.5±0.5μm.

6. The superhydrophobic label of claim 1, wherein: The substrate (2) is one of 80-150g copper plate paper, 80-120g card paper or 45g-75g aluminum-coated base paper.

7. The superhydrophobic label of claim 1, wherein: The primer layer (3) and the topcoat layer (5) are provided with an aluminum-coated layer (4).

8. The superhydrophobic label of claim 7, wherein: The aluminum-coated layer (4) is a vacuum aluminum-coated layer with a thickness of 280±40 angstroms.

9. The superhydrophobic label of claim 1, wherein: The substrate (2) is provided with a back-coating layer (1) on the side away from the primer layer (3).

10. The superhydrophobic label of claim 9, wherein: The back-coating layer (1) is a water-based acrylic film with a thickness of 2.5±0.7μm.

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