CN-122018065-A - Multi-angle reflective surface material based on super-uniform distribution algorithm

Abstract

The invention belongs to the technical field of reflective materials, and relates to a multi-angle reflective surface material based on an ultra-uniform distribution algorithm, which comprises main rubber and a plurality of arc-shaped raised rubbers formed on the surface of the main rubber, wherein the arc-shaped raised rubbers are provided with reflective functional layers, the plurality of arc-shaped raised rubbers are distributed in an ultra-uniform state on the surface of the main rubber, the distribution state of the arc-shaped raised rubbers is quantified through a distribution regularity parameter k, the k value range of the distribution of the arc-shaped raised rubbers is 0.6 to 0.8, the definition of the distribution regularity parameter k is that k=0 represents complete regular arrangement, and k=1 represents complete random arrangement. The multi-angle reflective surface material based on the ultra-uniform distribution algorithm provided by the invention remarkably improves the retroreflection performance under low incidence angle and multi-angle through a unique surface structure design.

Inventors

• WAN CHENGLONG
• CHEN GUOSHUN
• WANG ZENGYOU
• ZHANG LONGJIE
• ZENG BAOXING

Assignees

• 浙江夜光明光电科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260203

Claims (8)

1. 1. The multi-angle reflective surface material based on the super-uniform distribution algorithm is characterized by comprising main rubber and a plurality of arc-shaped raised rubbers formed on the surface of the main rubber, wherein a reflective functional layer is arranged on the arc-shaped raised rubbers; Wherein the plurality of arc-shaped raised rubbers are distributed in an ultra-uniform state on the surface of the main rubber, the distribution state of the arc-shaped raised rubbers is quantified by a distribution regularity parameter k, and the k value range of the distribution of the arc-shaped raised rubbers is 0.6 to 0.8; the definition of the distribution regularity parameter k is that k=0 represents a completely regular arrangement and k=1 represents a completely random arrangement.
2. 2. The multi-angle retroreflective surface material of claim 1 wherein the arcuately convex rubber distribution has a k value of 0.7.
3. 3. The multi-angle retroreflective surface material of claim 1 wherein the ratio of the area occupied by the arced raised rubber to the total area of the unit area within any one of the predetermined unit area areas of the body rubber surface, relative to the average of the ratio for all such unit areas, floats up and down by less than 20%.
4. 4. The multi-angle retroreflective surface material of claim 1 wherein the retroreflective functional layer comprises a strong highly reflective adhesive coated on the arcuate raised rubber surface and retroreflective microbeads partially deposited in the strong highly reflective adhesive.
5. 5. The multi-angle retroreflective surface material of claim 4 wherein the body rubber is a material having retroreflective characteristics and the strong highly reflective adhesive has a greater retroreflective effect than the body rubber.
6. 6. The multi-angle retroreflective surface material of claim 1 wherein the retroreflective microbeads comprise at least two microbeads having different refractive indices.
7. 7. The multi-angle reflecting surface material based on the ultra-uniform distribution algorithm according to claim 1, wherein the reflecting microbeads comprise first glass microbeads with a refractive index of 1.93 and second glass microbeads with a refractive index of 2.3, and the quantity or mass ratio of the first glass microbeads to the second glass microbeads is 1:1-2:1.
8. 8. The multi-angle retroreflective surface material of claim 1 further comprising a tie layer disposed on the back side of the body rubber.

Description

Multi-angle reflective surface material based on super-uniform distribution algorithm Technical Field The invention belongs to the technical field of reflective materials, and relates to a multi-angle reflective surface material based on an ultra-uniform distribution algorithm. Background The retroreflective material is a core component of road traffic safety facilities, is widely applicable to scenes with ground retroreflective requirements such as expressways, urban highways, tunnels, airport guides and the like, and the clear road retroreflective signs can greatly reduce the accident probability in the night vehicle driving process. The performance of the vehicle is directly related to the driving safety at night and in a low-light environment. At present, plane type retroreflective materials such as reflective paint, reflective film and the like widely used are still effective under ideal normal incidence conditions, but in actual road scenes, the light rays of the car lamps irradiate the mark at extremely low angles (close to being parallel to the road surface), so that the included angle (incidence angle alpha) between the light rays and the normal line of the surface of the mark is extremely large (see fig. 2). According to the principle of retroreflection optics (see fig. 3), when the incident angle is too large, most of light cannot form effective light path circulation in the reflective microbeads, or is transmitted or is reflected non-perfectly, so that the retroreflection efficiency is attenuated sharply, which is a common technical bottleneck of the existing planar reflective materials. To address the angle dependence problem, some approaches attempt to design the surface microstructure to change the local normal direction. For example, with periodically arranged protrusions or prismatic structures, the reflectivity can be improved at a specific angle, but the optical response has strong directional selectivity, cannot adapt to changing illumination angles, and the reflection effect rapidly decays when the incident direction deviates from the design angle. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the multi-angle reflective surface material based on the super-uniform distribution algorithm, and the retroreflection performance under low incidence angle and multi-angle is obviously improved through the unique surface structure design. In order to achieve the above purpose, the present invention adopts the following technical scheme: The multi-angle reflective surface material based on the super-uniform distribution algorithm comprises main rubber and a plurality of arc-shaped raised rubbers formed on the surface of the main rubber, wherein a reflective functional layer is arranged on the arc-shaped raised rubbers; Wherein the plurality of arc-shaped raised rubbers are distributed in an ultra-uniform state on the surface of the main rubber, the distribution state of the arc-shaped raised rubbers is quantified by a distribution regularity parameter k, and the k value range of the distribution of the arc-shaped raised rubbers is 0.6 to 0.8; the definition of the distribution regularity parameter k is that k=0 represents a completely regular arrangement and k=1 represents a completely random arrangement. As a further preferred aspect of the present invention, the arcuate raised rubber distribution has a k value of 0.7. In the present invention, the distribution regularity parameter k defines an intermediate value by defining two endpoints and then normalizing, and its calculation may be implemented by various spatial statistical methods, and as a specific, but non-limiting example, the k value may be obtained by the following steps: step 1, determining an analysis area and a sample, selecting an analysis area with statistical significance in an effective reflection area of a product, wherein the area contains enough (N is more than or equal to 100) bulges so as to ensure the stability of a statistical result, and recording the set of the central points of all bulges in the area as P. Step 2, calculating actual distance distribution statistics: a. calculating Euclidean distances between every two protrusions in the set P to obtain a distance set D; b. arranging all distance values in the set D in ascending order; c. Finding the median M of the ordered distance set; d. Taking arithmetic average value of all distance values larger than M, and recording the arithmetic average value as a first average distance L1; e. taking arithmetic average value of all distance values smaller than M, and recording the arithmetic average value as a second average distance L2; f. A distance dispersion difference deltal=l1-L2 of the actual point set is defined, which reflects the range of fluctuation of the distance in the actual distribution. Step 3, calculating random reference distribution statistics: Under the conditions of the same analysis area, the same total number of p