Optical coating for shoes and preparation method therefor

Abstract

The present invention discloses an optical coating for shoes. The optical coating comprises the following components in parts by weight: 10-80 parts of an organic silicon resin, 1-10 parts of SiO2 / TiO2 composite particles, 0.01-5 parts of microcapsules, 0.1-1 part of a refractive index regulator, and 0-5 parts of auxiliaries. In the present invention, by means of the optical coating for shoes, it can be guarantee that after long-term use in an extreme environment, the surface of the upper of a shoe is free from yellowing or peeling and the thermochromatic appearance effect is maintained.

Description

Optical coating for shoes and method for preparing the same TECHNICAL FIELD

[0001] The present application relates to the technical field of optical coating, in particular to the technical field of optical coating for shoes; specifically, it is an optical coating for shoes and a method for preparing the same. BACKGROUND

[0002] Ordinary coating generally refers to coating a layer of thin film with specific functions on the surface of various materials, such as metal film with decorative effect or insulating film providing protection. The main purpose of these coatings is to improve the appearance, durability or other non-optical properties of the material. Optical coating, on the other hand, specifically refers to the thin film used on optical components, whose main purpose is to change or control the optical properties of light transmission, reflection, absorption, polarization, etc., to optimize the performance of optical systems.

[0003] Optical coating involves a deep understanding of optical principles and precise process control. The theory of optical coating is based on the principles of interference and refraction of light waves, which realizes the precise manipulation of incident light waves by adjusting the thickness and refractive index difference of the film layers. This process needs to take into account the behavior of light when it propagates in different media, as described by Snell's law, and the response of light waves in different polarization states. With the development of technology, modern optical coating technology has developed from early evaporation deposition technology to high-precision processes including intermittent direct light control, ion beam sputtering and magnetron sputtering.

[0004] The production process of optical coating does not produce any harmful gas or industrial wastewater, the equipment is environmentally friendly, the unit price is lower, and the production capacity is higher. In addition, optical coating has the following advantages:

[0005] Enhanced optical performance: such as antireflection film can significantly reduce the reflection loss of optical elements and improve the transmission efficiency; high reflection film can increase the reflectivity of light, and make high-performance mirrors and laser cavities, etc.

[0006] Selective spectral filtering: such as through the design of a specific filter, only allowing light of a specific wavelength to pass through while blocking other wavelengths of light, which is crucial for many scientific and industrial applications.

[0007] Adapt to different application scenarios: according to different optical needs, optical coating can realize antireflection, dichroic, polarization, etc. by selecting different materials and designing different film layer structures.

[0008] Improve the performance of optoelectronic devices: the application of transparent conductive thin films enables optoelectronic devices (such as LEDs, thin-film solar cells) to have high transparency and good conductivity. TECHNICAL PROBLEM

[0009] With the improvement of people's living quality, the demand for personalized life supplies is getting higher and higher, and young people are more and more like products that can show their personality. For example, in addition to the basic practical function, people have very high demand for the appearance color of shoes. When some new shoes of certain brands are on the market, they are often popular with young people because of their unique appearance. Therefore, the applicant of the present application has innovatively developed a shoe optical coating film which not only presents different appearance colors when the temperature changes, but also meets the strict requirements of weather resistance and adhesion. Technical solution

[0010] The present application provides a shoe optical coating film which can ensure that the appearance of the upper does not yellow, does not peel off and maintains the appearance effect of temperature-induced discoloration under harsh environments.

[0011] A shoe optical coating film, characterized in that it comprises the following components by weight: 10-80 parts by weight of silicone resin, 1-10 parts by weight of SiO2 / TiO2 composite particles, 0.01-5 parts by weight of microcapsules, 0.1-1 parts by weight of refractive index adjuster and 0-5 parts by weight of auxiliary agent.

[0012] As a preferred embodiment, the SiO2 / TiO2 composite particles are SiO2 / TiO2 composite particles with core-shell structure.

[0013] As a preferred embodiment, the SiO2 / TiO2 composite particles are SiO2 / TiO2 composite particles with core-shell structure.

[0014] As a preferred embodiment, the microcapsules are composed of a wall material and a core material, wherein the core material includes thermochromic pigments, and the wall material is silicone resin.

[0015] As a preferred embodiment, the refractive index adjuster includes high refractive index material and / or low refractive index material.

[0016] As a preferred embodiment, the high refractive index material is selected from any one of Si3N4, Ti3O5 and NB2O5, and the low refractive index layer is one of SiO2 and Al2O3.

[0017] A preparation method of a shoe optical coating film, characterized in that: after the upper material is cleaned, it is placed in a vacuum coating film equipment, the shoe optical coating film is evaporated on the upper material, and the upper material is taken out, and the surface of the upper material forms the shoe optical coating film.

[0018] As a preferred embodiment, the vacuum degree of the vacuum coating film equipment is extracted to 1x10 -3 Pa to 5x10 -3 Pa.

[0019] As a preferred embodiment, the film thickness of the optical coating for shoes is 200-500nm.

[0020] As a preferred embodiment, the upper material includes EVA, nylon, TPU, leather, mesh cloth, etc.

[0021] As a preferred embodiment, the auxiliary agent includes scratch-resistant agent, adhesion promoter, viscosity regulator, etc. Advantages

[0022] Compared with the prior art, the shoe optical coating of the present application can ensure that the appearance of the upper does not yellow, does not peel off, and maintains the appearance effect of thermal discoloration under harsh environments. Best mode of the present application

[0023] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with examples. Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. It should be understood that the following description is only used to explain the present application, and is not used to limit the present application.

[0024] The terms "comprising", "including", "containing", "having" or any other similar phrase as used in the specification are intended to encompass non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.

[0025] The conjunction "consisting of" excludes any unrecited elements, steps, or components. If used in the claims, this phrase will close the claims to the inclusion of any material not specifically recited, except for impurities ordinarily associated with the recited material. When the phrase "consisting of is followed by a listing of elements, the phrase requires that the only elements of the claim are those recited in the list; no other elements are recited or implied.

[0026] When equivalent, concentration, or other value or parameter is expressed in a range or a preferred range or a range of upper preferred values and lower preferred values, it is understood that the disclosure specifically includes all ranges formed from any pair of an upper range limit or preferred value and a lower range limit or preferred value, whether or not the range is expressly disclosed. For example, where a range "1 to 5" is disclosed, the disclosure is to be interpreted to include the range "1 to 4," "1 to 3," "1 to 2," "1 to 2 and 4 to 5," "1 to 3 and 5," etc. When numerical ranges are disclosed, unless otherwise stated, the range is intended to include both the upper and lower values and all intervening values of the range, including integers within the range, unless the context clearly indicates otherwise.

[0027] The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. "Optional" or "any of" means that the subsequently described event or circumstance can or cannot occur, and that the description includes instances where the event occurs and instances where it does not.

[0028] Approximating language such as, for example, "approximately," "substantially," and "about" are terms concerning the relative tolerances, permits, and / or measurements of magnitude, such that a measurement of a first quantity is approximately equal to a measurement of a second quantity when the magnitude of the first quantity is within a threshold of the magnitude of the second quantity. In some examples, the approximation can correspond to the precision of an instrument used to measure the quantities. In the description of the application and in the claims, ranges are used as endpoints including the terminal ends of the range. Otherwise, specified ranges are to be understood to be open-ended, in that they are intended to cover values outside of the specified ranges, unless otherwise stated.

[0029] The indefinite articles "a" and "an," as used herein in the specification, unless clearly indicated to the contrary, should be understood to mean one or more. The use of the term "optionally" with respect to any feature means that the feature is contemplated to be present or absent and that the description includes instances where the feature is present and instances where the feature is absent.

[0030] In addition, the description herein of any aspect or embodiment of the application using terms such as "one embodiment," "an embodiment," "at least one embodiment," "some embodiments," "exemplary," "specific example," or the like, is intended to convey that the described feature, structure, or characteristic is included in at least one embodiment of the present application. Such phrasing of the foregoing is not intended to imply that all of multiple embodiments are the same, although aspects of embodiments can be the same. Further, the herein described features, advantages, and characteristics of the application can be combined in any combination. In addition, the description herein of any aspect or embodiment using terms such as "comprises," "comprising," "containing," "containing," "having," "including," "including," "includes," "optionally including," "specifies," "specifying," "state," "states," "state of," "state of the art," or the like, is intended to convey that the described feature, structure, or characteristic is included in at least one embodiment of the present application. Such phrasing of the foregoing is not intended to imply that all of multiple embodiments are the same, although aspects of embodiments can be the same. Further, the herein described features, advantages, and characteristics of the application can be combined in any combination.

[0031] The following examples are implemented on the basis of the technical solutions of the present application, and give detailed implementation modes and specific operation processes, but the protection scope of the present application is not limited to the following examples.

[0032] The present application provides a kind of optical coating for shoes, including the following weight parts of ingredients: silicone resin 10-80 weight parts, SiO2 / TiO2 Composite particles 1-10 weight parts, microcapsule 0.01-5 weight parts, refractive index modifier 0.1-1 weight parts, auxiliary agent 0-5 weight parts.

[0033] The SiO2 / TiO2 Composite particles are SiO2 / TiO2 Composite particles with core-shell structure.

[0034] The SiO2 / TiO2 Composite particles are SiO2 / TiO2 Composite particles with core-shell structure.

[0035] The microcapsule is composed of wall material and core material, wherein the core material includes thermochromic pigment, and the wall material is silicone resin.

[0036] The refractive index modifier includes high refractive index material and / or low refractive index material.

[0037] The high refractive index material is selected from any one of Si3N4, Ti3O5, NB2O5, and the low refractive index layer is one of SiO2 or Al2O3.

[0038] The present application also provides a preparation method of the optical coating for shoes, wherein the upper material is cleaned, placed in a vacuum coating device, and the optical coating for shoes is evaporated on the upper material, and the optical coating for shoes is formed on the surface of the upper material.

[0039] The vacuum degree of the vacuum coating device is extracted to 1×10 -3 Pa to 5×10 -3 Pa.

[0040] The film thickness of the optical coating for shoes is 200-500 nm.

[0041] The upper material includes EVA, nylon, TPU, leather, mesh cloth, etc.

[0042] The auxiliary agent includes scratch-resistant agent, adhesion promoter, viscosity regulator, etc. Embodiment

[0043] An optical coating for shoes, including the following weight parts of ingredients: silicone resin 10 weight parts, SiO2 / TiO2 Composite particles 10 weight parts, microcapsule 1 weight parts, refractive index modifier 0.1 weight parts, auxiliary agent 1 weight parts.

[0044] The SiO2 / TiO2 Composite particles are SiO2 / TiO2 Composite particles with core-shell structure.

[0045] The SiO2 / TiO2 Composite particles are SiO2 / TiO2 Composite particles with core-shell structure.

[0046] The microcapsule is composed of a wall material and a core material, wherein the core material comprises thermochromic pigments, and the wall material is a silicone resin.

[0047] The refractive index adjusting agent comprises a high refractive index material and / or a low refractive index material.

[0048] The high refractive index material is selected from a material composed of any one of Si3N4, Ti3O5, and NB2O5, and the low refractive index layer is a material composed of one of SiO2 and Al2O3.

[0049] The preparation method of the optical coating for shoes comprises the following steps: cleaning a shoe upper material, placing the shoe upper material in a vacuum coating device, evaporating the optical coating for shoes on the shoe upper material, and taking out the shoe upper material, so that the optical coating for shoes is formed on the surface of the shoe upper material.

[0050] The vacuum degree of the vacuum coating device is extracted to 1x10 -3 Pa to 5x10 -3 Pa.

[0051] The film layer thickness of the optical coating for shoes is 200-500 nm.

[0052] The shoe upper material comprises EVA, nylon, TPU, leather, and mesh cloth.

[0053] The auxiliary agent comprises a scratch-resistant agent, an adhesion promoter, a viscosity regulator, and the like. Embodiment

[0054] An optical coating for shoes comprises the following components by weight: 50 parts by weight of a silicone resin, 5 parts by weight of SiO2 / TiO2 composite particles, 1 part by weight of a microcapsule, 1 part by weight of a refractive index adjusting agent, and 2 parts by weight of an auxiliary agent.

[0055] The other components and steps are the same as those in Embodiment 1. Embodiment

[0056] An optical coating for shoes comprises the following components by weight: 80 parts by weight of a silicone resin, 1 part by weight of SiO2 / TiO2 composite particles, 5 parts by weight of a microcapsule, 0.5 parts by weight of a refractive index adjusting agent, and 5 parts by weight of an auxiliary agent.

[0057] The other components and steps are the same as those in Embodiment 1.

[0058] Comparative Example 1

[0059] On the basis of Embodiment 2, the SiO2 / TiO2 composite particles therein are replaced by SiO2 particles.

[0060] Comparative Example 2

[0061] On the basis of Example 2, the SiO2 / TiO2 composite particles therein are replaced by TiO2 particles.

[0062] Comparative Example 3

[0063] On the basis of Example 2, the microcapsules are replaced by core material thermochromic pigments.

[0064] Performance test

[0065] (1) Accelerated aging test: the upper materials of Examples 1-3 and Comparative Examples 1-3 are subjected to 1500h artificial climate aging test (test according to GB / T 1865-1997 Artificial Climate Aging and Artificial Radiation Exposure of Color Paint and Varnish), and whether there is peeling and other abnormalities is observed from the appearance. If there is peeling, it is marked as X, and if it is intact, it is marked as √.

[0066] (2) Yellowing resistance test: the shoe optical plating of Examples 1-3 and Comparative Examples 1-3 is respectively sprayed on two metal plates with clean surfaces, and after baking at 280℃ for 10min, one metal plate is taken out as a standard plate, and the other metal plate is baked at 280℃ for 1hr in an oven and taken out as a sample plate. The yellowing of the optical plating on the surface of the sample plate is compared. If yellowing occurs, it is marked as X, and if no yellowing occurs, it is marked as √.

[0067] (3) Thermochromic test: the shoe optical plating of Examples 1-3 and Comparative Examples 1-3 is respectively heated from room temperature to 60℃ by infrared heating, and whether the shoe optical plating has discoloration is observed.

[0068] The performance test results are shown in Table 1 below:

[0069] Test Accelerated aging test Yellowing resistance test Thermochromic test Example 1 √ √ √ Example 2 √ √ √ Example 3 √ √ √ Comparative Example 1 √ × √ Comparative Example 2 × √ √ Comparative Example 3 √ √ ×

[0070] From the above examples and comparative examples, after replacing the SiO2 / TiO2 composite particles with SiO2 particles, the yellowing resistance performance is poor, which may be because TiO2 has the effect of ultraviolet shielding, and can improve the yellowing resistance performance in SiO2 / TiO2 composite particles. After replacing the SiO2 / TiO2 composite particles with TiO2 particles, due to the lack of the reinforcing connection effect of SiO2 particles, peeling phenomenon occurs after accelerated aging test. And replacing the microcapsules with core material thermochromic pigments, the thermochromic effect disappears, which may be because the microcapsule structure is not protected, and the thermochromic pigment is damaged during evaporation, so the appearance effect of color change with temperature change cannot be realized.

[0071] In general, because the surface of conventional shoes does not usually adopt optical coating technology, nor does it adopt microcapsules and other materials, it cannot obtain the appearance effect of color change according to temperature change; without using SiO2 / TiO2 composite particles, long-term use can easily cause the shoe surface to yellow and the colored appearance to peel off. The optical coating for shoes adopted by the present application can ensure that the appearance of the shoe surface does not change color, does not peel off, and maintains the appearance effect of thermochromic color change under harsh environments during long-term use.

[0072] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An optical coating for footwear, characterized by: The composition comprises the following ingredients by weight: 10-80 parts of silicone resin, 1-10 parts of SiO2 / TiO2 composite particles, 0.01-5 parts of microcapsules, 0.1-1 parts of refractive index adjusting agent, and 0-5 parts of auxiliary agent.

2. The optical coating for footwear of claim 1, wherein: The SiO2 / TiO2 composite particles are core-shell structure SiO2 / TiO2 composite particles.

3. The optical coating for footwear of claim 2, wherein: The SiO2 / TiO2 composite particles are core-shell structure SiO2 / TiO2 composite particles.

4. The optical coating for footwear of claim 1, wherein: The microcapsules are composed of a wall material and a core material, wherein the core material comprises thermochromic pigments, and the wall material is a silicone resin.

5. The optical coating for footwear of claim 1, wherein: The refractive index adjusting agent comprises a high refractive index material and / or a low refractive index material.

6. The optical coating for footwear of claim 5, wherein: The high refractive index material is selected from any one of Si3N4, Ti3O5, and NB2O5, and the low refractive index layer is one of SiO2 and Al2O3.

7. Process for the production of optically coated shoes according to any one of claims 1-6, characterized in that: After cleaning the vamp material, the vamp material is placed in a vacuum coating equipment, and the optical coating for shoes is evaporated on the vamp material.

8. A method of making an optically coated shoe according to claim 7, wherein: The vacuum degree of the vacuum coating equipment is extracted to 1x10 -3 Pa to 5x10 -3 Pa.

9. The method of claim 7, wherein: The film layer thickness of the optical coating for shoes is 200-500 nm.

10. Process for the production of optically coated shoes according to any one of claims 7-8, characterized in that: The vamp material comprises EVA, nylon, TPU, leather, and mesh fabric.