Nanometer photonic crystal synthetic leather

Abstract

The utility model provides nano photonic crystal synthetic leather. The nano photonic crystal synthetic leather comprises first-process semi-finished leather, the first process semi-finished leather sequentially comprises a photonic crystal film layer, a first surface slurry layer, a first middle slurry layer, a first bottom slurry layer and a Bass layer from top to bottom. According to the nano photonic crystal synthetic leather disclosed by the utility model, the photonic crystal film is creatively applied to the first-process semi-finished leather, and the first-process semi-finished leather is rich in high gloss, has strong and obvious color change under different angles and light rays, and has gorgeous color change characteristics; and meanwhile, the appearance has richer lines and a presentation effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to leather material technical field, concretely relates to a kind of nanometer photonic crystal synthetic leather. BACKGROUND

[0002] With the continuous improvement of people's quality and functional requirements of leather products, we have been seeking product innovation to enhance competitiveness and added value. Traditional leather dyeing and finishing process can use a large amount of chemical dyes to penetrate the fiber structure to achieve coloring, and heavy metal complexing agents, fixing agents and other auxiliaries are required, which can easily lead to wastewater pollution and chemical residue risk, and also cause some pollution to the environment.

[0003] The color of nanometer photonic crystal film is derived from the modulation of physical structure to light, which is non-toxic and environmentally friendly, in line with the current environmental protection concept and the requirements of sustainable development, providing a new direction for the green development of the leather industry. Nanometer photonic crystal film has unique optical properties, which can produce Bragg diffraction based on periodic dielectric structure, produce a variety of colors by accurately controlling the structure parameters, and has high color purity and strong angle dependence, widely used in display, sensing, anti-counterfeiting and other fields, providing an optical technology basis for the invention of nanometer photonic crystal synthetic leather. The continuous development of material compounding technology also makes it possible to combine nanometer photonic crystal film with leather.

[0004] In view of this, the present case conducts in-depth research on the above-mentioned problems, and thus the present case is produced. CONTENT OF THE UTILITY MODEL

[0005] The utility model solves the technical problems of poor appearance effect of artificial synthetic leather and chemical pollution caused by traditional leather dyeing in the prior art, and provides a nanometer photonic crystal synthetic leather, which has strong luster, strong and obvious color change under different angles and light, and beautiful color change characteristics, and has more rich texture and presentation effect.

[0006] The utility model is realized as follows: a nanometer photonic crystal synthetic leather includes a first process semi-finished leather.

[0007] Further, the photonic crystal film layer is a nanometer photonic crystal film layer.

[0008] Further, the nanometer photonic crystal film layer is attached with a PET carrier film layer on the side away from the first surface sizing layer.

[0009] Further, the first surface sizing agent layer and the first middle sizing agent layer are prepared by mixing polyurethane surface material resin, dimethylformamide, butanone and color powder; and the first bottom sizing agent layer is prepared by mixing first polyurethane bottom material resin, dimethylformamide, butanone and color powder.

[0010] Further, the thickness of the base layer is 1.15-1.25mm.

[0011] Further, the second process reattachment layer is reattached to the first process semi-finished product leather, and the second process reattachment layer comprises a second surface sizing agent layer and a second bottom sizing agent layer, and the second bottom sizing agent layer is attached to the photonic crystal film layer.

[0012] Further, the second process reattachment layer further comprises a release paper layer for bearing the second surface sizing agent layer, and the release paper layer is any one of mirror surface release paper or mist surface velvet release paper.

[0013] Further, the second surface sizing agent layer is prepared by mixing polyurethane surface material resin, dimethylformamide and butanone; and the second bottom sizing agent layer is prepared by mixing second polyurethane bottom material resin, dimethylformamide, butanone and bridging agent.

[0014] The nano photonic crystal synthetic leather of the utility model has the advantages that the nano photonic crystal synthetic leather is created by applying the photonic crystal film on the first process semi-finished product leather, so that the appearance of the nano photonic crystal synthetic leather is rich in strong luster, has strong and obvious color change under different angles and light, and has gorgeous color change characteristics; the second process reattachment layer is reattached to the first process semi-finished product leather, so that the appearance of the nano photonic crystal synthetic leather has more abundant lines and presentation effects; the second process introduces diversified surface textures through different release papers (mirror surface / mist surface), so that the appearance of the nano photonic crystal synthetic leather is rich in levelness. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described in connection with the embodiments and with reference to the drawings.

[0016] Fig. 1 is the exploded view of the first process semi-finished product leather scraping sample process in the utility model.

[0017] Fig. 2 is the exploded view of the second process reattachment scraping sample process in the utility model.

[0018] Fig. 3 is the exploded view of the nano photonic crystal synthetic leather in the utility model.

[0019] Fig. 4 is the structural schematic view of the nano photonic crystal synthetic leather in the utility model.

[0020] Reference signs:

[0021] The first process semi-finished leather 100, the photonic crystal film layer 1, the first surface sizing agent layer 2, the first middle sizing agent layer 3, the first bottom sizing agent layer 4, the base layer 5, the PET carrier film layer 6, the second process laminated layer 200, the release paper layer 7, the second surface sizing agent layer 8, and the second bottom sizing agent layer 9. [DETAILED DESCRIPTION]

[0022] In order to better understand the technical scheme of the utility model, the technical scheme of the utility model will be described in detail below in combination with the drawings of the specification and specific implementation manners.

[0023] Please refer to Figs. 1 to 4 As shown in the figure, the utility model provides a kind of nanometer photonic crystal synthetic leather, including first process semi-finished leather 100 and second process laminated layer 200, the second process laminated layer 200 is laminated on first process semi-finished leather 100.

[0024] The utility model nanometer photonic crystal synthetic leather initiatively applies photonic crystal film on first process semi-finished leather 100, makes the apparent nanometer photonic crystal synthetic leather strong lustre, there is strong and obvious color change under different angles and light, with gorgeous color change characteristics;Second process laminated layer 200 is laminated on first process semi-finished leather 100, so that the apparent nanometer photonic crystal synthetic leather has more abundant grain and presentation effect.

[0025] Preferably, the first process semi-finished leather 100 includes photonic crystal film layer 1, first surface sizing agent layer 2, first middle sizing agent layer 3, first bottom sizing agent layer 4 and base layer 5 from top to bottom in sequence. First process semi-finished leather 100 takes photonic crystal film layer 1 as carrier, first surface sizing agent layer 2, first middle sizing agent layer 3 and first bottom sizing agent layer 4 are sequentially coated on the top, and finally base layer 5 is laminated, and then first process semi-finished leather 100 is prepared after drying. The apparent effect of first process semi-finished leather 100 is good in gloss, excellent in wear resistance, yellowing resistance, low-temperature folding resistance and peel strength.

[0026] Photonic crystal film layer 1 gives synthetic leather excellent wear resistance. Compared with traditional leather, the surface hardness of synthetic leather is significantly improved, and it is not easy to appear scratch and wear in long-term use, which greatly prolongs the service life of leather products. At the same time, photonic crystal film layer 1 has special optical properties, so that synthetic leather presents unique gloss and color effect, such as metal gloss, color change effect, etc., which increases the beauty and fashion of leather products, and can meet the harsh requirements of high-end fashion field on the appearance of leather. The dense structure of photonic crystal film layer 1 makes the surface of synthetic leather not easy to stain stains, and the stains are easy to clean, which facilitates the daily maintenance and arrangement of leather products.

[0027] Preferably, the photonic crystal film layer 1 is a nano-photonic crystal film layer 1. The nano-photonic crystal film is a PVC or TPU film with PPO, providing unique structural color; the structural color does not fade over time; the color changes with the direction of incident light or viewing angle.

[0028] Preferably, the nano-photonic crystal film layer 1 is selected from the series of nano-photonic crystal films produced by Guangdong Zhuhai Guangyu Technology Co., Ltd. (Model: PP0-E; Film Physical Properties: Film thickness 15 nm, Tensile property ≥100, Visible light transmittance 85%, Haze ≤5), which is a fully transparent organic polymer material. The sheet-shaped pigment is formed by the ordered arrangement of nano-microballs, and the multiple color effects are achieved by Bragg diffraction, so that the pigment has excellent transparency, high chroma, elegant texture, and does not require any colorant addition, does not contain chemical dyes, is non-toxic and non-polluting, and has good tensile and pressing properties.

[0029] Preferably, the nano-photonic crystal film layer 1 is attached to a PET carrier film layer 6 away from the first surface paste layer 2. The PET carrier film layer 6 serves as a carrier for the photonic crystal film layer 1, and has excellent transparency, glossiness, peelability, moisture resistance and airtightness, thereby providing excellent protection against damage to the nano-photonic crystal film caused by external forces during transportation or use.

[0030] Preferably, the first surface paste layer 2 and the first middle paste layer 3 are both made by mixing polyurethane fabric resin, dimethylformamide, butanone and color powder. The polyurethane fabric resin has a solid content of 30.0±1.0, a modulus of 70.0±2.0%, a breaking strength of ≥40.0 and a breaking elongation of ≥650.

[0031] Preferably, the first bottom paste layer 4 is made by mixing first polyurethane bottom material resin, dimethylformamide, butanone and color powder. The first polyurethane bottom material resin has a solid content of 40.0±1.0, a modulus of 30.0±2.0%, a breaking strength of ≥20.0 and a breaking elongation of ≥500.

[0032] Preferably, the thickness of the base layer 5 is 1.15-1.25 mm, and it has good flexibility and peelability.

[0033] The first process semi-finished leather 100 is produced as follows: the first surface sizing layer 2 is coated on the photonic crystal film layer 1, and the first surface sizing layer 2 is completely dried; the first middle sizing layer 3 is coated on the first surface sizing layer 2, and the first middle sizing layer 3 is completely dried; the first bottom sizing layer 4 is coated on the first middle sizing layer 3, and the first bottom sizing layer 4 is dried to a semi-dry state, that is, a clear fingerprint can be formed when a finger is pressed; the base layer 5 is attached to the first bottom sizing layer 4, and the attachment is performed by using an attachment roller with a pressure of 0.5 MPa; the first process semi-finished leather 100 is obtained by drying, cooling and shaping at a temperature of 100-110 ℃ and a speed of 6 m / min, peeling off the PET carrier film layer 6, trimming, and winding. The trimming is performed to trim the uneven corners or the places with stains, scratches or other abnormalities to obtain a complete and high-quality product. The main physical properties of the first process semi-finished leather 100 are tested; the Taber abrasion resistance test result is 400 rotations without damage, the abrasive wheel used is H-22, and the weight is 1 kg. The Stoll abrasion resistance test result is 2000 times, without obvious wear and tear, and the diameter of the wear and tear is less than 1 cm. The yellowing resistance test result is that the UA yellowing resistance test is simulated sunlight irradiation for 24 hours, the grade is 5; the UB yellowing resistance test is simulated ultraviolet light irradiation for 3 hours, the grade is 4; the US yellowing resistance test is simulated spotlight light irradiation for 72 hours, the grade is 5. The room temperature folding resistance test is that the folding angle is set to 22.5°±0.5°, and the folding number is 100,000 times, and no cracking is qualified; the low-temperature folding resistance is that the folding angle is set to 22.5°±0.5° at-15 ℃, and the folding number is 40,000 times, and no cracking is qualified. The peeling strength value is 135, and a value greater than 105 is qualified.

[0034] Preferably, the second process reattachment layer 200 includes a second surface sizing layer 8 and a second bottom sizing layer 9, and the second bottom sizing layer 9 is attached to the photonic crystal film layer 1. The second process reattachment layer 200 makes the synthetic leather have a rich apparent effect.

[0035] Preferably, the second process reattachment layer 200 further includes a release paper layer 7 for bearing the second surface sizing layer 8, and the release paper layer 7 uses any one of a mirror surface release paper or a matte surface velvet release paper. If the second process reattachment layer 200 uses the mirror surface release paper, the apparent of the obtained nano photonic crystal synthetic leather not only has the texture effect of the release paper but also has the optical color of the nano photonic crystal film, so that the product has various textures and unique color effects of the photonic crystal film. If the second process reattachment layer 200 uses the matte surface velvet release paper, the apparent of the obtained nano photonic crystal synthetic leather forms a layer of matte surface velvet effect, so that the product has more levels, looks more low-key and luxurious, appears more natural and soft, the leather surface is more delicate, the hand feeling is soft and smooth, and a better touch experience is provided.

[0036] Preferably, the second surface sizing agent layer 8 is made by mixing polyurethane surface resin, dimethyl formamide, butanone; the solid content of the polyurethane surface resin is 30.0±1.0, the modulus is 70.0±2.0%, the breaking strength is ≥40.0, and the elongation at break is ≥650.

[0037] The second bottom sizing agent layer 9 is made by mixing second polyurethane bottom resin, dimethyl formamide, butanone, and bridging agent. The solid content of the second polyurethane bottom resin is 70.0±2.0%, the modulus is 4.0±1.0, the breaking strength is ≥30.0, and the elongation at break is ≥500.

[0038] The bridging agent is N-75 bridging agent, which is aliphatic polyisocyanate (hexamethylene diisocyanate biuret) in the form of about 75% butyl acetate (EAC) solution and is a colorless to slightly yellow transparent liquid.

[0039] When the second process laminated layer 200 is produced, the second surface sizing agent layer 8 is coated on the release paper layer 7 and dried; the second bottom sizing agent layer 9 is coated on the second surface sizing agent layer 8 and dried to a slightly dry state, and some fingerprints are left on the second bottom sizing agent layer 9 by pressing with fingers, thereby obtaining the second process laminated layer 200.

[0040] When the nano photonic crystal synthetic leather is produced, the PET carrier film layer 6 is first peeled off from the photonic crystal film layer 1, and a layer of water is applied to the photonic crystal film layer 1 of the first process semi-finished product leather 100 by using a wet cloth, so as to better adhere to the second process; then the second bottom sizing agent layer 9 of the second process laminated layer 200 is adhered to the photonic crystal film layer 1 by using a laminating machine, and the second bottom sizing agent layer 9 is dried at a temperature of 140℃ and a speed of 6m / min (the drying time is 7-10 minutes), cooled and shaped, peeled off from the release paper layer 7, trimmed, and wound, thereby obtaining the nano photonic crystal synthetic leather.

[0041] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific embodiments described are only illustrative, and are not intended to limit the scope of the present application, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present application should be covered by the scope of the claims of the present application.

Claims

1. A nanophotonic crystal synthetic leather, characterized in that: The first process semi-finished leather comprises, from top to bottom, a photonic crystal film layer, a first surface sizing agent layer, a first middle sizing agent layer, a first bottom sizing agent layer, and a sole layer.

2. The nanophotonic photonic crystal synthetic leather of claim 1, wherein: The photonic crystal film layer is a nano photonic crystal film layer.

3. The nanophotonic photonic crystal synthetic leather of claim 2, wherein: The nano photonic crystal film layer is attached to a PET carrier film layer on the side away from the first surface sizing agent layer.

4. The nanophotonic photonic crystal synthetic leather of claim 1, wherein: The thickness of the sole layer is 1.15-1.25 mm.

5. The nanophotonic synthetic leather of claim 1, wherein: The second process reattached layer is reattached to the first process semi-finished leather, and comprises a second surface sizing agent layer and a second bottom sizing agent layer.

6. The nanophotonic photonic crystal synthetic leather of claim 5, wherein: The second process reattached layer further comprises a release paper layer for bearing the second surface sizing agent layer, and the release paper layer is any one of a mirror surface release paper or a mist surface velvet release paper.

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