WATERPROOF QUICK-DRYING SELF-ADHESIVE WRITING AND PRINTING MATERIAL AND PREPARATION METHOD THEREOF

Abstract

A waterproof quick-drying self-adhesive writing and printing material and a preparation method thereof are provided. The material includes: a pressure-sensitive adhesive layer provided with a release layer on its lower surface; and a substrate having a lower surface attached and fixed to the upper surface of the pressure-sensitive adhesive layer and an upper surface coated with a surface coating. The preparation method includes the steps of: S1. adhering a release paper or a release film to the lower surface of a pressure-sensitive adhesive with a desired size, to serve as a base; S2. taking a substrate having the same shape and area as the pressure-sensitive adhesive in S1, and adhering the substrate to the upper surface of the pressure-sensitive adhesive; and S3. uniformly coating the prepared coating solution on the upper surface of the substrate, and drying to obtain a surface coating with a thickness of 3-50 .Math.m.

Claims

1. A waterproof quick-drying self-adhesive writing and printing material, comprising: a pressure-sensitive adhesive layer provided with a release layer on a lower surface of the pressure-sensitive adhesive layer; a substrate having a lower surface attached and fixed to an upper surface of the pressure-sensitive adhesive layer and an upper surface coated with a surface coating, wherein the surface coating contains nano-oxide particles as components and has a microporous gap structure on a surface of the surface coating.

2. The waterproof quick-drying self-adhesive writing and printing material according to claim 1, wherein the nano-oxide particles are nano-alumina and/or nano-silica particles having a particle size of 3-200 nm.

3. The waterproof quick-drying self-adhesive writing and printing material according to claim 1, wherein the surface coating has a thickness of 3-50 .Math.m.

4. The waterproof quick-drying self-adhesive writing and printing material according to claim 1, wherein the components of the surface coating further contain one or more of a binder, an ultraviolet absorber, and an antioxidant.

5. A preparation method of a waterproof quick-drying self-adhesive writing and printing material, comprising steps of: S1. adhering a release paper or a release film to a lower surface of a pressure-sensitive adhesive with a desired size, to serve as a base; S2. taking a substrate having a same shape and area as the pressure-sensitive adhesive in S1, and adhering the substrate to an upper surface of the pressure-sensitive adhesive to make the substrate fit with the shape of the pressure-sensitive adhesive; and S3. uniformly coating a prepared coating solution on an upper surface of the substrate to obtain a coated substrate, and drying the coated substrate to obtain a surface coating with a thickness of 3 50 .Math.m, wherein the surface coating is the waterproof quick-drying self-adhesive writing and printing material, wherein the prepared coating solution contains a solvent and nano-oxide particles as components.

6. The preparation method of the waterproof quick-drying self-adhesive writing and printing material according to claim 5, wherein the solvent in S3 includes polyvinyl alcohol (PVA), polyacrylic acid, propylene glycol methyl ether acetate (PMA), and ethanol.

7. The preparation method of the waterproof quick-drying self-adhesive writing and printing material according to claim 5, wherein the nano-oxide particles in S3 are nano-alumina and/or nano-silica particles, and the nano-oxide particles have a solid content of 10-50%.

8. The preparation method of the waterproof quick-drying self-adhesive writing and printing material according to claim 5, wherein the prepared coating solution further contains a functional aid, and the functional aid includes a binder, an ultraviolet absorber, and an antioxidant.

9. The preparation method of the waterproof quick-drying self-adhesive writing and printing material according to claim 5, wherein the substrate includes: a polyethylene terephthalate (PET) film, a polyvinyl chloride (PVC) film, a polyurethane (PU) film, a polypropylene (PP) film, and a plastic-coated paper, as materials.

10. The preparation method of the waterproof quick-drying self-adhesive writing and printing material according to claim 5, wherein in S3, the step of drying is performed at a temperature of > 100° C. for a duration of ≥ 1 min.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes and configurations shown in the drawings should generally not be regarded as limitations when implementing this application. For example, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition/decrease/attribution division, specific shapes, position relationships, connection means, size ratio relationships of certain units (components), etc., based on the technical concept disclosed in this application and exemplary drawings.

[0032] FIG. 1 is a schematic diagram of a side structure of a waterproof quick-drying self-adhesive writing and printing material provided according to an embodiment of this application;

[0033] FIG. 2 is a schematic diagram of a top structure of a waterproof quick-drying self-adhesive writing and printing material provided according to an embodiment of this application.

DESCRIPTION OF REFERENCE NUMERALS

[0034] In drawings: 1-pressure-sensitive adhesive layer, 2-release layer, 3-substrate, 4-surface coating.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present application will be further described in detail below in conjunction with the drawings through specific embodiments.

[0036] In the description of this application, “a plurality of” means two or more, unless otherwise stated. The terms “first”, “second”, “third”, etc. in the present application are intended to distinguish the objects they refer to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as an emphasis on importance degree or order, etc.). The expressions “including”, “comprising”, “having”, etc. also mean “not limited to” (certain units, components, materials, steps, etc.).

[0037] The wordings “upper”, “lower”, “left”, “right”, “middle”, etc. referred to herein are usually for the convenience of intuitive understanding with reference to the drawings, rather than an absolute limitation on the position relationships in actual products. The changes of these relative position relationships should also be considered to be within the scope of this application, without departing from the technical concept disclosed in this application.

[0038] An embodiment of the present invention provides a waterproof quick-drying self-adhesive writing and printing material, as shown in FIG. 1 and FIG. 2, the material comprising: [0039] a pressure-sensitive adhesive layer 1 provided with a release layer 2 on its lower surface; and [0040] a substrate 3 having a lower surface attached and fixed to the upper surface of the pressure-sensitive adhesive layer 1 and an upper surface coated with a surface coating 4, wherein, the surface coating 4 contains coatings and nano-alumina particles and/or nano-silica particles having a particle size of 3-200 nm as components. The surface coating 4 has a microporous gap structure on its surface, and generally has a thickness of 3-50 .Math.m. As the nano-alumina particles and/or nano-silica particles have good transparency and a large specific surface area, the surface coating containing them has a microporous gap structure which can not only absorb liquids such as solvents, oil and water, but also adsorb pigments and dyes in ink, so that the color can be fixed to meet the requirements for writing with pen and printability. In addition, as the nano-alumina particles and/or nano-silica particles themselves are insoluble in solvents, oil or water, the coating itself will not be dissolved, so that the material can be moisture-proof and waterproof while absorbing water. Due to the good transparency of the nano-alumina particles and/or nano-silica particles, the coating will not cover the texture and color of the surface of the substrate (such as a film layer) itself. In addition, a binder, an ultraviolet absorber, an antioxidant and other aids may be added to the coating solution when applying the coating, to achieve different performance requirements, depending on the different requirements for indoor and outdoor use.

[0041] The substrate 3 bonded to the surface coating 4 is usually a different plastic film (including but not limited to PET, PVC, PP, etc.) or a plastic-coated paper, and can be selected from a transparent film or a colored material, or a surface-treated substrate, such as metal-plated gold and silver, glitter, laser, etc. The substrate 3 has an upper surface bonded to the surface coating 4, and a lower surface bonded to the pressure-sensitive adhesive layer 1. The substrate 3 usually has a thickness of 20-200 .Math.m, which can be adjusted appropriately according to special requirements.

[0042] The release layer 2 provided on the lower surface of the pressure-sensitive adhesive layer 1 is usually a release paper or a release film, which is a kind of auxiliary material, can not only be used for release, but also can be used as a substrate during lettering or cutting. The release layer 2 should be removed during use.

[0043] An embodiment of the present invention also provides a preparation method of a waterproof quick-drying self-adhesive writing and printing material, comprising steps of: [0044] S1. adhering a release paper or a release film to the lower surface of a pressure-sensitive adhesive with a desired size, to serve as a base; [0045] S2. taking a substrate having the same shape and area as the pressure-sensitive adhesive in S1 and adhering the substrate to the upper surface of the pressure-sensitive adhesive to make the substrate fit with the shape of the pressure-sensitive adhesive; and [0046] S3. uniformly coating the prepared coating solution on the upper surface of the substrate, and drying (at a temperature above 100° C. for a duration of not less than 1 min) to obtain a surface coating with a thickness of 3=50 .Math.m, namely, the waterproof quick-drying self-adhesive material. Wherein, the coating solution contains a solvent and nano-oxide particles as components, and the nano-oxide particles are specifically nano-alumina particles and/or nano-silica particles having a particle size of 3-200 nm and have a solid content of 10-50%. A functional aid such as a binder, an ultraviolet absorber, an antioxidant and other aids may also be added to the coating solution to achieve different performance requirements as necessary. The solvent in the coating solution is one or more of PVA polyvinyl alcohol, polyacrylic acid, PMA propylene glycol methyl ether acetate, ethanol, other alcohols or other organic solvents. A volatile solvent should be selected, which will evaporate after drying the coating solution on the upper surface of the substrate, thus leaving a coating, and the volatile solvent may allow the impurity content in the coating to be as low as possible.

[0047] The technical features of the foregoing embodiments can be combined arbitrarily (as long as there is no conflict in the combination of these technical features). For conciseness of description, not all possible combinations of the technical features of the foregoing embodiments are described. However, those embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0048] The present application has been described more specifically and in detail above through the general description and specific embodiments. It should be understood that, based on the technical concept of the present application, some conventional adjustments or further innovations can also be made to these specific embodiments, and the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of the claims of the present application as long as they do not depart from the technical concept of the present application.