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CN-122011465-A - Spectrally selective optical functional film, preparation method and outdoor black-beautifying device

CN122011465ACN 122011465 ACN122011465 ACN 122011465ACN-122011465-A

Abstract

The invention discloses a spectrum selective optical functional film, a preparation method and an outdoor black-making device, and relates to the technical field of optical functional materials. The optical functional film comprises a flexible transparent substrate and an ultraviolet light regulation and control functional area combined with the substrate, wherein the ultraviolet light regulation and control functional area comprises a high polymer medium and a spectrum selective active agent dispersed therein. The functional film has specific spectral response characteristics that the average blocking rate is more than or equal to 93% in a UVB wave band (280-315 nm) which is easy to cause sunburn, and the average transmittance is more than or equal to 88% in a UVA wave band (315-400 nm) which is easy to promote tanning. The invention also discloses a preparation process of the film and an outdoor black-making device, and the device utilizes the functional film as a shielding fabric, so that accurate light filtering is realized. The invention effectively solves the technical problems that the existing outdoor products cannot take both 'sunburn prevention' and 'blacking promotion' into account, realizes healthy blacking while ensuring skin safety, and has clear visual field and strong weather resistance.

Inventors

  • LIN PENG
  • YANG QIAN
  • LIAO ZHIGANG

Assignees

  • 西弥斯医疗科技(深圳)有限公司

Dates

Publication Date
20260512
Application Date
20260214

Claims (8)

  1. 1. A spectrally selective optical functional film comprising a flexible transparent substrate and an ultraviolet light modulating functional region bonded to the substrate; The ultraviolet light regulation and control functional region comprises a high molecular medium and a spectrum selective active agent dispersed therein, and the optical functional film has the following optical characteristics: The average light blocking rate in the UVB wave band is more than or equal to 90 percent; the average light transmittance in the UVA wave band is more than or equal to 80 percent.
  2. 2. The spectrally selective optical functional film of claim 1 wherein the spectrally selective active agent comprises at least one or a combination of more selected from the group consisting of cinnamate derivatives, benzimidazole derivatives, salicylate derivatives, triazine derivatives, and benzophenone derivatives.
  3. 3. The spectrally selective optical functional film of any one of claims 1-2 wherein the mass percent of the spectrally selective active agent is 1.0% to 15.0% based on the total mass of the uv light-modulating functional region.
  4. 4. The spectrally selective optical functional film of claim 1 wherein the optical functional film is a multilayer composite structure comprising: a base material layer composed of a transparent thermoplastic polymer and having a thickness of 0.04mm to 0.50mm; and the functional coating is used as the ultraviolet light regulating and controlling functional area and is attached to at least one surface of the substrate layer, and the thickness of the functional coating is 0.01mm to 0.20mm.
  5. 5. The spectrally selective optical functional film according to claim 4, wherein the material of the substrate layer is selected from one of ethylene-vinyl acetate copolymer, polyethylene terephthalate, thermoplastic polyurethane or polyvinyl chloride, and the surface of the substrate layer is corona-treated or primer-treated, and the surface tension is not less than 38 dynes.
  6. 6. The spectrally selective optical film of claim 1 further comprising a weatherable protective layer on the outermost side, said weatherable protective layer being a transparent hydrophobic coating having a thickness of 0.1mm or less and a water contact angle of 90 ° or more.
  7. 7. A method of preparing a spectrally selective optical functional film according to any one of claims 1-6, comprising the steps of: (1) Dissolving or dispersing the spectrum selective active agent, the dispersing agent and the leveling agent in a solvent to prepare uniform functional auxiliary agent premix; (2) Mixing the functional auxiliary agent premix with a polymer film-forming resin emulsion, and homogenizing at a shear rate of more than 1000rpm to obtain a functional coating liquid; (3) And coating the functional coating liquid on the surface of the flexible transparent substrate, and performing graded heat curing to form the ultraviolet light regulation and control functional area.
  8. 8. An outdoor tanning device comprising a support frame and a masking material mounted to the support frame, the masking material being made from the spectrally selective optical functional film of any one of claims 1-6.

Description

Spectrally selective optical functional film, preparation method and outdoor black-beautifying device Technical Field The invention relates to the technical field of optical functional materials, in particular to a spectrum selective optical functional film, a preparation method and an outdoor black device. Background With the improvement of the living standard and the diversification of aesthetic ideas of people, healthy bronze or wheat-colored skin (i.e. "black") is becoming a fashion trend. Outdoor sunbathing is one of the main ways to achieve tanning. Ultraviolet rays in natural sunlight are largely classified into UVA and UVB. The UVA wave band can directly reach the dermis layer to stimulate melanin generation, is a core wave band for realizing blackness, and the UVB wave band is strong in energy and mainly acts on the epidermis layer, so that skin sunburn, red swelling and desquamation are extremely easy to cause, and skin lesions are even induced. The prior outdoor black protection product mainly has the following problems: the common sun cream or sun clothes mostly adopt a broad-spectrum ultraviolet blocking technology, and simultaneously block UVA and UVB, so that the sun cream or sun clothes cannot be effectively blackened. Existing sunshades or tent fabrics either have very low light transmittance (full shade) and cannot enjoy sunbathing, or have high light transmittance but lack spectral selectivity, resulting in users suffering from excessive UVB damage while receiving UVA. There is a lack of a flexible film material that can combine "precise filtering" with "high transmission of visible light", and the material needs to have good weatherability and mechanical strength to adapt to outdoor use environment. Therefore, development of a spectrally selective optical functional film capable of efficiently blocking UVB, highly transparent UVA and visible light, and application thereof to outdoor devices is a technical problem to be solved currently. Disclosure of Invention The invention aims to provide a spectrum selective optical functional film which has an excellent spectrum screening function and can effectively prevent skin sunburn and realize healthy tanning. Another object of the present invention is to provide a method for preparing the above functional film and an outdoor tanning device comprising the film. In order to achieve the above purpose, the invention adopts the following technical scheme: A spectrally selective optical functional film for healthy tanning, the optical functional film comprising a flexible transparent substrate and an ultraviolet light modulating functional region bonded to the substrate; The ultraviolet light regulation and control functional region comprises a high molecular medium and a spectrum selective active agent dispersed therein, and the optical functional film has the following optical characteristics: The average light blocking rate in the UVB wave band is more than or equal to 90 percent; The average light transmittance in the UVA wave band is more than or equal to 80 percent; the average light transmittance in the visible light band is more than or equal to 85 percent. Preferably, the spectrum selective active agent comprises at least one or a combination of more selected from cinnamate derivatives, benzimidazole derivatives, salicylate derivatives, triazine derivatives or benzophenone derivatives. Preferably, the spectrally selective agent is selected from the group consisting of isooctyl methoxycinnamate, phenylbenzimidazole sulfonic acid, octocrylene, ethylhexyl salicylate, or a combination of ethylhexyl methoxycinnamate and hexyl diethylaminohydroxybenzoate. Preferably, the mass percentage of the spectrally selective active agent is 1.0% to 15.0% based on the total mass of the uv light-modulating functional region. Preferably, the mass percentage of the spectrum selective active agent is 3.5% to 4.5%, preferably, the optical functional film is a multilayer composite structure, comprising: a base material layer composed of a transparent thermoplastic polymer and having a thickness of 0.04mm to 0.50mm; A functional coating layer, which is used as the ultraviolet light regulation and control functional area and is attached to at least one surface of the substrate layer, wherein the thickness of the functional coating layer is 0.01mm to 0.20mm; The functional coating is formed by solidifying aqueous polyurethane resin, acrylic resin or organic silicon resin containing the spectrum selective activator. Preferably, the material of the substrate layer is selected from one of ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), thermoplastic Polyurethane (TPU) or polyvinyl chloride (PVC), and the surface of the substrate layer is subjected to corona treatment or priming treatment, and the surface tension is more than or equal to 38 dynes. Preferably, the optical functional film further comprises a weather-proof protective layer positione