Noctilucent organic silicon leather and preparation method thereof

Abstract

The invention discloses noctilucent organic silicon leather and a preparation method thereof. The noctilucent fabric comprises a cloth layer, a white silica gel layer, a noctilucent silica gel layer and a wear-resistant layer, wherein the noctilucent silica gel layer comprises the following raw materials: vinyl silicone oil, hydrogen-containing silicone oil, fumed silica, noctilucent powder, a platinum catalyst, a silane coupling agent, a retarder and a wear-resistant agent. The preparation method comprises the following steps: step 1, preparing the noctilucent silica gel layer; 2, preparing a white silica gel layer; thirdly, the white silica gel layer is attached to the cloth; step 4, preparing a wear-resistant layer; the organic silicon leather disclosed by the invention is attractive, wear-resistant, ultraviolet-resistant, high-temperature-resistant, aging-resistant, tearing-resistant, waterproof, good in hand feeling and long in service life, and has a noctilucent function; the method can be widely applied to various products; especially when the noctilucent leather is applied to a mobile phone shell and a protective shell, the noctilucent leather is good in leather texture and hand feeling, and the noctilucent function enables a mobile phone to have a high-grade, fashionable, cool and scientific sense.

Description

Technical Field

[0001] This invention relates to the field of leather technology, and in particular to a luminescent silicone leather and its preparation method. Background Technology

[0002] Leather comes in two main types: natural leather and synthetic leather. Its applications are primarily twofold: First, leather is used in the fashion industry, becoming a preferred raw material for many high-end brands. Its beautiful textures and colors make it a focal point for fashionable items. It's widely used in shoes, handbags, belts, wallets, and other care products, becoming a symbol of style. Second, leather is also very popular in home furnishings and decorative items. Due to its beauty, ease of cleaning, and durability, leather has become a material for many durable furniture and decorative pieces. It's also widely used in soft furnishings such as curtains, cushions, sofa covers, and carpets, providing high-quality options for home decor. Additionally, leather is used in mobile phone cases and electronic products, enhancing their aesthetics and style.

[0003] Currently, natural leather, also known as genuine leather, refers to animal hides. Genuine leather production involves numerous processes, generates pollution, is expensive, and has limited availability. The presence of pollutants such as dyes and chemically active substances during production limits its applications. Synthetic leather primarily consists of PVC, PU, ​​and microfiber. PVC synthetic leather uses large amounts of plasticizers and stabilizers during production, is difficult to degrade, and contains high levels of heavy metals, polluting the environment after disposal. It is banned in countries like the US, Europe, and Japan, hindering its application. PU synthetic leather uses large amounts of the chemical solvent DMF during production, which is highly polluting and leaves residues on the finished product, further limiting its use. Microfiber, also known as "microfiber synthetic leather," suffers from drawbacks such as poor breathability, susceptibility to scratches, and easy staining, also limiting its application. Summary of the Invention

[0004] The present invention aims to solve the above problems and provides a luminescent silicone leather and a preparation method thereof. The silicone leather is beautiful, wear-resistant, UV-resistant, high-temperature resistant, aging-resistant, tear-resistant, waterproof, has a good feel, long life, and has a luminescent function. At the same time, an efficient preparation method is provided.

[0005] To achieve the above objectives, the present invention provides a luminescent silicone leather, which comprises, from bottom to top, a fabric layer, a white silicone layer, a luminescent silicone layer, and a wear-resistant layer; the luminescent silicone layer comprises the following raw materials in parts by weight: 70-100 parts vinyl silicone oil, 2-4 parts hydrogen-containing silicone oil, 25-40 parts fumed silica, 5-35 parts luminescent powder, 0.1-0.5 parts platinum catalyst, 0.5-2 parts silane coupling agent, 0.1-0.3 parts retardant, and 1-3 parts wear-resistant agent.

[0006] Furthermore, the present invention also provides a method for preparing luminescent silicone leather, the steps of which are as follows:

[0007] Step 1: Prepare the luminescent silicone, coat the surface of the release paper with the luminescent silicone to prepare the luminescent silicone layer;

[0008] Step 2: Prepare white silicone. Coat the back of the luminescent silicone layer with white silicone to prepare the white silicone layer.

[0009] Step 3: Adhere the white silicone layer to the fabric to form a fabric layer;

[0010] Step 4: Coat the surface of the luminescent silicone layer with vulcanized soft rubber to prepare a wear-resistant layer.

[0011] Furthermore, in step one, the preparation process of the luminescent silicone layer is as follows:

[0012] S1. Select vinyl silicone oil, hydrogen-containing silicone oil, fumed silica, phosphorescent powder, platinum catalyst, silane coupling agent, retardant, and wear-resistant agent, and mix them in proportions by weight to prepare phosphorescent silicone.

[0013] S2. Coat the release paper with luminous silicone to form a luminous silicone layer, and dry the luminous silicone layer.

[0014] Furthermore, the wear-resistant layer has a thickness of 50–100 μm; the luminous silicone layer has a thickness of 50–250 μm; the white silicone layer has a thickness of 50–150 μm; and the fabric layer has a thickness of 0.5 mm–0.7 mm.

[0015] Furthermore, the white silicone layer comprises the following raw materials in parts by weight: 70-100 parts of vinyl silicone oil, 2-4 parts of hydrogen-containing silicone oil, 25-40 parts of fumed silica, 5-10 parts of white paste, 0.1-0.5 parts of platinum catalyst, and 0.1-0.3 parts of retardant.

[0016] Furthermore, the raw materials for the vulcanized soft rubber include synthetic rubber, vulcanizing agent, filler, and plasticizer.

[0017] Furthermore, the fabric layer can be replaced with a film.

[0018] The organosilicon leather of this invention is aesthetically pleasing, wear-resistant, UV-resistant, high-temperature resistant, aging-resistant, tear-resistant, waterproof, has a good feel, a long lifespan, and a luminous function. It can be widely used in various products, especially mobile phone cases and protective cases. Its leather texture, good feel, and luminous function give the phone a high-end, fashionable, cool, and technological feel. At the same time, it provides a simplified production process, an efficient preparation method, and low processing costs, while being environmentally friendly and pollution-free. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the description are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional structural diagram of the invented silicone leather.

[0021] Figure 2 This is a schematic diagram of the invention applied to a mobile phone case.

[0022] The markings in the diagram are: 100, fabric layer; 200, white silicone layer; 300, glow-in-the-dark silicone layer; 400, wear-resistant layer.

[0023] The following description, in conjunction with embodiments and the accompanying drawings, further illustrates the realization of the objectives, functional characteristics, and advantages of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the invention clearer, the technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of protection of the invention.

[0025] Example 1:

[0026] like Figure 1 , Figure 2 As shown, this invention provides a method for preparing luminescent silicone leather, the steps of which are as follows:

[0027] Step 1: Prepare luminescent silicone oil and coat it onto the surface of release paper to prepare luminescent silicone oil layer 300. Specifically, the preparation process of the luminescent silicone oil layer 300 in Step 1 is as follows: Step S1: Select vinyl silicone oil, hydrogen-containing silicone oil, fumed silica, luminescent powder, platinum catalyst, silane coupling agent, retardant, and wear-resistant agent in a weight ratio of 500:20:150:150:2:5:1:1; put them into a mixer and disperse them. Stir for 10 minutes to form a viscous, slurry-like glow-in-the-dark silicone; Step S2: Coat the glow-in-the-dark silicone onto the release paper to form a glow-in-the-dark silicone layer 300 with a thickness of 150μm. Then, transfer the glow-in-the-dark silicone layer 300 to a tunnel oven and dry it at 150℃ for 5 minutes. After drying, peel off the release paper and discard it. The outer surface of the glow-in-the-dark silicone layer 300 has a leather-like feel and texture, and the surface is very smooth. Release paper, also known as silicone paper or anti-stick paper, mainly serves to isolate sticky objects and is generally peeled off and discarded during use. In the production of this invention, release paper is used as an auxiliary material to give the luminous silicone layer 300 a leather texture, and is not part of the structure of this invention. The luminous powder is a material that can automatically emit light in the dark, and its main component is rare earth, belonging to inorganic materials. In this case, the luminous powder is an energy-storing luminous powder, which emits light when exposed to natural light, sunlight, lamplight, ultraviolet light, etc. Afterwards, the light energy is stored and slowly released as luminescence after the light exposure stops. Therefore, it can still be seen to glow at night or in the dark. In specific applications, various colors of luminescent powder can be selected according to the purpose. The fumed silica is fumed silica produced by the gaseous process, with the molecular formula SiO2. It is white, fluffy powder, porous, non-toxic, odorless, and pollution-free, and resistant to high temperatures. At the same time, its chemical inertness and special thixotropic properties can improve the tensile strength, tear resistance, and abrasion resistance of rubber products. The strength of the rubber is increased by dozens of times after modification.

[0028] Step 2: Prepare white silicone rubber and coat the back of the luminescent silicone rubber layer 300 with white silicone rubber to prepare white silicone rubber layer 200. Specifically, the process for preparing white silicone rubber layer 200 in step 2 is similar to that for preparing luminescent silicone rubber layer 300. The preparation process for white silicone rubber layer 200 is as follows: Step a: Select vinyl silicone oil, hydrogen-containing silicone oil, fumed silica, white slurry, platinum catalyst, and retarder in a weight ratio of 500:20:150:40:2:1; put them into a mixer and disperse them. Stir for 10 minutes to form a viscous, slurry-like white silica gel; Step b: Coat the back of the luminescent silica gel layer 300 with white silica gel to form a white silica gel layer 200 with a thickness of 80μm; After the white silica gel layer 200 is formed, transfer it to a tunnel oven and dry it at 150℃. After 2.5 minutes, the white silica gel layer 200 is semi-dry; The white silica gel layer 200 is white. In specific applications, the white paste can be replaced with other colored pastes according to your needs.

[0029] Step 3: The white silicone layer 200 is bonded to the fabric to form fabric layer 100. Specifically, in step 3, the white silicone layer 200 is in a semi-dry state and has strong viscosity. The white silicone layer 200 is bonded to the fabric to form fabric layer 100, which is then conveyed to a tunnel oven and placed at 150°C for 10 minutes of vulcanization molding. The thickness of fabric layer 100 is 0.5mm. The fabric material can be canvas or other tear-resistant fabrics.

[0030] Step 4: Coat the surface of the luminescent silicone layer 300 with vulcanized soft rubber to prepare the wear-resistant layer 400. Specifically, in Step 4, after removing the release paper from the luminescent silicone layer 300, vulcanized soft rubber is coated on its surface to form the wear-resistant layer 400, which has a thickness of 50 μm. After the wear-resistant layer 400 is formed, it is transferred to a tunnel oven and dried at 150°C for 5 minutes. The wear-resistant layer 400 is transparent. The vulcanized soft rubber is a material made of high molecular weight compounds, including synthetic rubber, vulcanizing agents, fillers, plasticizers, and other raw materials, which are produced through processes such as mixing, calendering, and vulcanization. The wear-resistant layer 400 has excellent elasticity and ductility, is wear-resistant, high-temperature resistant, aging resistant, tear-resistant, and increases service life.

[0031] Furthermore, the finished product, from bottom to top, includes a fabric layer 100, a white silicone layer 200, a glow-in-the-dark silicone layer 300, and a wear-resistant layer 400. After step four, the finished product needs to be tested. Select a piece of finished leather; scratch it with your finger and find it difficult to scratch; pour water on the leather and the water will slide off without penetrating; this indicates that the wear-resistant layer 400 makes the leather wear-resistant and waterproof; the leather's surface shows leather texture, feels good to the touch, absorbs light in daylight or under light, and glows in the dark, indicating that the glow-in-the-dark silicone layer 300 makes the leather beautiful, feels good, and has a glow-in-the-dark function; place the leather in the sun for several hours, then remove it and observe that the leather color does not change and there is no cracking; place the leather under a UV lamp for a certain period of time. When the leather surface is irradiated at a distance, the leather color remains unchanged and there is no cracking, indicating that the leather is resistant to ultraviolet rays, high temperatures, aging, tearing, and has a long lifespan. The leather of this invention can be widely used in various products, such as car seats, car covers, sofas, chairs, plush toys, clothes, pants, shoes, decorations, signs, logos, bags, various leather bags, gloves for various equipment, etc. Especially when used in mobile phone cases and protective cases, its leather texture, good feel, and luminous function give the phone a high-end, fashionable, cool, and technological feel. One of the significant features of this invention is that luminous powder is added to the formula, giving the leather a luminous function and producing an unexpected effect, namely a cool and technological feel.

[0032] Example 2:

[0033] The difference between this case and Example 1 is that the fabric layer is replaced with a film, and the film is made of PET substrate. Under the same production methods, in the original Example 1 preparation method, after the white silicone layer 200 is formed in step three, it is transferred to a tunnel oven and dried at 150°C for 5 minutes until fully dry. In step four, adhesive is coated onto the PET substrate, forming a PET substrate layer, and the adhesive forms an adhesive layer. In step five, the un-dried adhesive layer is bonded to the white silicone layer 200, transferred to a tunnel oven, and dried at 150°C for 10 minutes for vulcanization. The thickness of the bonding layer is 5 μm, and the thickness of the PET substrate layer is... The thickness of the PET substrate layer is 50μm; the PET substrate layer is made of PET plastic raw material, namely polyethylene terephthalate, which is the most important type of thermoplastic polyester, abbreviated as PET; in this embodiment, the PET substrate layer is white, but other colors can be selected as needed; the adhesive is a silicone adhesive, also called silicone rubber adhesive, which is a single-component transparent liquid, mainly used for thermal vulcanization bonding of silicone rubber to metals, resins, glass fibers, and ceramics; the finished product of this embodiment also has the characteristics of being beautiful, wear-resistant, UV-resistant, high-temperature resistant, aging-resistant, tear-resistant, waterproof, good-feeling, long-lasting, and also has a luminous function.

[0034] Example 3:

[0035] The difference between this case and Example 2 is that the film uses TPU substrate, but the production method is the same as in Example 2. The TPU substrate is thermoplastic polyurethane elastomer, abbreviated as TPU, which is a type of elastomer that can be plasticized by heating and dissolved by solvents. It has excellent properties such as high strength, high toughness, wear resistance, and oil resistance. It has good comprehensive performance and processing performance. The finished product of this Example 3 can be widely used in many fields such as national defense, medical, food, footwear, cables, clothing, automobiles, pipes, films and sheets.

[0036] Other embodiments differ from Embodiment 1 in that the weight ratio of the raw materials used is different, or the raw materials are replaced, which will not be listed here.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A luminescent silicone leather, characterized in that, The silicone leather comprises, from bottom to top, a fabric layer or film, a white silicone layer, a luminescent silicone layer, and a wear-resistant layer; the luminescent silicone layer comprises the following raw materials in parts by weight: 70-100 parts vinyl silicone oil, 2-4 parts hydrogen-containing silicone oil, 25-40 parts fumed silica, 5-35 parts luminescent powder, 0.1-0.5 parts platinum catalyst, 0.5-2 parts silane coupling agent, 0.1-0.3 parts retardant, and 1-3 parts wear-resistant agent.

2. A method for preparing luminescent silicone leather, characterized in that, The preparation method involves the following steps: Step 1: Prepare the luminescent silicone, coat the surface of the release paper with the luminescent silicone to prepare the luminescent silicone layer; Step 2: Prepare white silicone. Coat the back of the luminescent silicone layer with white silicone to prepare the white silicone layer. Step 3: Adhere the white silicone layer to the fabric to form a fabric layer; Step 4: Coat the surface of the luminescent silicone layer with vulcanized soft rubber to prepare a wear-resistant layer.

3. The method for preparing luminescent silicone leather according to claim 2, characterized in that, In step one, the preparation process of the luminescent silicone layer is as follows: S1. Select vinyl silicone oil, hydrogen-containing silicone oil, fumed silica, phosphorescent powder, platinum catalyst, silane coupling agent, retardant, and wear-resistant agent, and mix them in proportions by weight to prepare phosphorescent silicone. S2. Coat the release paper with luminescent silicone to form a luminescent silicone layer, and dry the luminescent silicone layer.

4. The method for preparing a luminescent silicone leather according to claim 3, characterized in that, The wear-resistant layer has a thickness of 50–100 μm; the luminous silicone layer has a thickness of 50–250 μm; the white silicone layer has a thickness of 50–150 μm; and the fabric layer has a thickness of 0.5 mm–0.7 mm.

5. The method for preparing a luminescent silicone leather according to claim 2, characterized in that, The white silicone layer comprises the following raw materials in parts by weight: 70-100 parts vinyl silicone oil, 2-4 parts hydrogen-containing silicone oil, 25-40 parts fumed silica, 5-10 parts white paste, 0.1-0.5 parts platinum catalyst, and 0.1-0.3 parts retardant.

6. The method for preparing a luminescent silicone leather according to claim 2, characterized in that, The raw materials for the vulcanized soft rubber include synthetic rubber, vulcanizing agent, filler, and plasticizer.

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