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Composite leather material for ultraviolet photochromic test as well as preparation method and application of composite leather material

A technology of ultraviolet light and compound leather, which is applied in the direction of color/spectral characteristic measurement, textile and papermaking, coating, etc. It can solve the problems of inability to quantify, inability to simulate the response of ultraviolet light, and inaccurate evaluation, so as to shorten the test period, The effect of convenient application evaluation and extended response time

Active Publication Date: 2022-03-04
远东正大检验集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that in the existing in vitro evaluation, the existing substrate cannot simulate the response to ultraviolet light, and thus the evaluation is inaccurate and cannot be quantified

Method used

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  • Composite leather material for ultraviolet photochromic test as well as preparation method and application of composite leather material
  • Composite leather material for ultraviolet photochromic test as well as preparation method and application of composite leather material
  • Composite leather material for ultraviolet photochromic test as well as preparation method and application of composite leather material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] S1, polyurethane (50 parts by weight), optical variable capsule powder (10 parts by weight), dimethylformamide (30 parts by weight), nonionic surfactant S-80 (1 part by weight), leveling agent (0.2 parts by weight) and talc powder (8.8 parts by weight), weighed according to the stated ratio and added in order, first add dimethylformamide to the container, then add talc powder and optical variable capsule powder, fully stir with a mixer for 10min, Make sure that the talcum powder and the light-changing capsule powder are dispersed in dimethylformamide; add 1 / 3 polyurethane, stir for 30 minutes, check whether the talc powder and the light-changing capsule powder are mixed evenly; add 2 / 3 polyurethane, non-ionic surfactant and fluid Stir the leveling agent for 60 minutes; use a vacuum defoamer to defoam for 30 minutes; use a 100-mesh filter to filter to make polyurethane slurry. The polyurethane described in this example is polyurethane, and its main functions include: 1) ...

Embodiment 2

[0077]Directly use artificial leather as the substrate layer, and coat the optically variable capsule powder slurry on it. The coating method is the same as that of S6 and S7 in Example 1, wherein the coating thickness of the third step is 150 μm, and the total thickness of the ultraviolet light variable layer is 400 μm.

[0078] The color change response time of the composite leather material prepared in this embodiment is 100 seconds.

Embodiment 3

[0080] The substrate layer was prepared by the method of S1-S5 in Example 1, wherein, polyurethane (60 parts by weight), optical variable capsule powder (5 parts by weight), dimethylformamide (25 parts by weight), nonionic surfactant S-80 (2 parts by weight), polyester-modified polydimethylsiloxane (0.2 parts by weight) and talcum powder (7.8 parts by weight); S6 method to prepare 10wt% optically variable capsule powder slurry. Fully soak the substrate layer into 3wt% optically variable capsule powder slurry for a period of time, take it out, dry, and cool to obtain a composite leather material with a thickness of 100 μm.

[0081] The color change response time of the composite leather material prepared in this embodiment is 40 seconds.

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Abstract

The invention discloses a composite leather material for an ultraviolet photochromic test, and a preparation method and application thereof. The composite leather material comprises a base material layer; the ultraviolet photochromic layer is formed on the surface of the base material layer; wherein the thickness of the ultraviolet photochromic layer is 100-400 [mu] m, and the ultraviolet photochromic layer is formed by applying 3-10% by mass of photochromic capsule powder slurry to the base material layer and drying the photochromic capsule powder slurry; the ultraviolet photochromic layer has multiple layers, the concentration of each layer is in gradient distribution, and the concentration of the outermost layer is the lowest. Through optimization of a formula and a coating process, the prepared composite leather material for the ultraviolet photochromic test has a microporous structure, the base material layer contains the photochromic capsule powder, the response of human skin to sunlight and ultraviolet light can be simulated, the composite leather material can be used for quantitative evaluation of the sunscreen performance of cosmetics, application evaluation is convenient and easy to master, and the test period can be greatly shortened.

Description

technical field [0001] The invention relates to a new material, in particular to a composite leather material for ultraviolet light change test, its preparation method and application. Background technique [0002] The skin is the largest organ of the human body. It plays the important role of resisting the intrusion of the external environment or harmful substances, and it is also the basis of people's beauty and confidence. When the skin is exposed to the sun for a long time, it is susceptible to skin damage caused by ultraviolet radiation. Ultraviolet light is the light with a wavelength of 200nm-400nm in sunlight, which can be divided into UVC (200-280nm), UVB (280-315nm), and UVA (315-400nm) according to the wavelength band. Usually UVC is filtered by the ozone layer of the earth, and only UVB and UVA can reach the surface of the earth. Most of the UVB is absorbed by the epidermis of the skin and cannot penetrate the skin, but its energy is relatively high, which can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14D06N3/18D06N7/00G01N21/25
CPCD06N3/183D06N3/14D06N7/0094D06N3/0056G01N21/25D06N2211/28D06N2209/08
Inventor 闫树永余存军翟宇赵国樑张宇
Owner 远东正大检验集团有限公司