Reflective film with prism three-dimensional structure

Abstract

The utility model provides a prism three-dimensional structure reflective film, which comprises a three-dimensional angle unit or a three-dimensional angle microprism unit, and is formed by combining a plurality of composite three-dimensional angle microprism units formed by permutation and combination of the three-dimensional angle microprism units, the composite solid angle unit combination comprises a transverse composite solid angle unit combination and a longitudinal composite solid angle unit combination; the solid angle unit comprises three reflecting surfaces and a reflecting observation axis R, and one surface opposite to the three reflecting surfaces and the reflecting observation axis R is a bottom surface and the like; the large-angle reflective characteristic is met, meanwhile, the effective reflection distance of the reflective sign is greatly increased, the prejudgment and early warning requirements of drivers and passengers are well met, the driving safety is greatly improved, and the preparation technology is simple.

Description

Technical field:

[0001] The utility model relates to the field of reflective films, in particular to a reflective film with a prism three-dimensional structure. Background technology:

[0002] The micro-prismatic three-dimensional structure is the core part of the micro-prismatic reflective film to achieve retro-reflection. Different three-dimensional structures or micro-prismatic three-dimensional structures and combinations have different degrees of difficulty in mold processing, and the reflective effect in the reflective film also has different efficiency and directional uniformity. Micro-prismatic reflective film is a reflective material with high reflective brightness and excellent aging resistance. It is widely used in various road traffic safety signs, traffic safety facilities, vehicle safety devices and other fields, and can play an obvious safety warning role.

[0003] Retroreflection, also known as regression, is a characteristic of reflective materials that they can make the light incident on the material return to its original light source. The two known three-dimensional structures with retroreflective functions are microspheres and microprism structures. Most of the current reflective film products use these two structures to achieve retroreflection. Retroreflective materials using microspheres are commonly known as microbead reflective films. Usually, glass microbeads are used to be spread on the surface of a transparent film through an adhesive layer, and then a mirror reflective layer is vacuum-plated behind the microbeads or an air bag is formed. The total reflection characteristics of the material interface are used to make the incident light retroreflective.

[0004] The retro-reflective material using a micro-prismatic geometry with three mutually perpendicular reflective surfaces is commonly known as a micro-prismatic reflective film. Usually, a metal mold with a micro-prismatic structure on the surface is first manufactured, and the micro-prismatic structure is replicated and molded on the transparent resin surface through lamination technology. Then, a mirror reflective layer is vacuum-plated or an air bag is formed (using the total reflection characteristics of the material interface) to make the incident light retro-reflective. The sphere is a geometrically symmetrical structure in any direction, so the use of the sphere for retro-reflection function shows the same retro-reflectivity in all directions; the micro-prismatic geometry with three mutually perpendicular reflective surfaces has a high retro-reflectivity in several axis directions only when the three intersecting axes are used as the main observation direction, while other directions are greatly reduced. The actual manufacturing process of the microsphere cannot control the true roundness, size consistency, and glossiness of the sphere surface, while the micro-prismatic geometry can achieve uniform angle, size, and surface gloss, so in actual use, the retro-reflectivity of the micro-prismatic geometry is greater than that of the micro-sphere product. Typically, microprismatic retroreflective sheeting is produced by first making a standard mold with a structured surface and then using processes such as embossing, extrusion or casting and curing to produce a retroreflective sheeting that forms a microprismatic structure.

[0005] A full cube microprism is a cube composed of three mutually perpendicular faces, and all three faces are complete squares; a triangular pyramid microprism is a cube composed of three mutually perpendicular faces, and all three faces are right triangles. For the processing method of the full cube microprism geometry, the processing method of the relevant US patent includes a pin-bundling. According to the retro-reflective characteristics of the full cube microprism geometry, geometric units with different directions are independently processed, and then arranged to form a mold. Such a geometry has a full reflection characteristic in the direction where the observation axis coincides with the geometry axis, that is, the three collection faces are 100% reflective; but in practice, the length L and width w of the geometry used in the retro-reflective material are generally less than 0.5 mm, so this kind of full cube structure technology that is processed one by one and combined is difficult to process and difficult to combine.

[0006] Another method for processing triangular pyramid micro-prism geometry is direct machining technology, which usually uses a rapid cutting method. Diamond cutting tools are used to cut three sets of parallel V-grooves on the surface of flat materials, such as metals, optical resins, etc. The micro-prism three-dimensional geometric unit formed when the three sets of V-grooves intersect each other at an angle of 60 degrees has the characteristics of an equilateral triangle bottom surface and three isosceles right triangles that are perpendicular to each other and of the same size. The three faces of this geometric micro-prism have a reflective efficiency of about 50%-55%, and have It has the characteristics of high retroreflectivity at small angles and rapid attenuation at large angles; the standard inspection and observation viewing angles of micro-prism reflective film are 0.2°, 0.5°, and 1°; and one of the three mutually perpendicular intersecting axes is used as the reference axis. Because of the characteristics of the structure, the retroreflective brightness at an angle of 0.2° is usually the highest, the 0.5° angle is 40%-60% of the 0.2° angle, and the 1° angle is only 10%-25%; if the direction perpendicular to the reference axis is observed, that is, rotated 90°, the reflective brightness shown by the three observation angles is 50%-60% of the aforementioned. Unlike a sphere, micro-prismatic geometric reflective film has obvious rotation direction characteristics. As a key material for traffic safety, micro-prismatic reflective film has become a key element of the function of reflective film as the number of vehicles increases and the road width continues to widen. The observation brightness at the two angles of 0.5° and 1° and the characteristics of the reflective brightness in all directions of rotation have become key elements of the function of reflective film.

[0007] Among the currently available industrial technologies, the triangular pyramid microprism geometry is the most common, and the mold processing is simple, but its brightness is low at 0.5° and 1°, and the reading distance is 100-150m. When the vehicle speed is above 70km / h, it cannot meet the driver's and passengers' requirements for pre-judgment and warning. Another type of full-cube microprism is used by some companies because of its complex mold processing and high difficulty, but the production cost is high and the product is less used. Another type of solid corner unit reflective sheeting is published by 3M Company of the United States, patent number 200480006052.4, "Thin sheeting and retroreflective sheeting including solid corner units", which is designed with adjacent continuous grooves, and the observed brightness of the micro-prism geometry at two angles of 0.5° and 1° is improved and the uniformity of the reflected brightness in all directions of rotation is achieved by changing the combination of the forward and lateral angles of the adjacent grooves. This method can find a suitable angle combination through precise calculation and repeated testing to achieve the characteristic of approximate full light retroreflection; but its processing complexity and difficulty are similar to those of a full cube, and the complex mold structure is subject to rapid loss and change during use, so the full prism produced by this technology is costly, which is not conducive to widespread promotion and use, so it is difficult to see the above-mentioned product applications on the market.

[0008] The Chinese patent announcement number is CN106597587A, and the disclosed "A micro-prismatic reflective film and its manufacturing method" discloses a micro-prismatic reflective film, including a reflective layer, an adhesive layer and a release material layer. The reflective layer includes an A interface and a B interface. The A interface is a smooth surface. A micro-prism array structure is arranged on the B interface. A support column is also arranged in an array between the B interface and the adhesive layer. An air bag is formed between the B interface, the adhesive layer and the support column. The utility model forms an air bag by directly arranging support columns in an array between the micro-prism array structure and the adhesive layer at the B interface of the reflective layer, thereby removing the white bottom film layer, so that the thickness of the obtained micro-prismatic reflective film is greatly reduced and has excellent flexibility. It will not warp or fall off when pasting objects with curved or other irregular surfaces, and is suitable for stamping processing. At the same time, the smaller air bag and the excellent elasticity of the adhesive layer at the bottom of the air bag prevent the air bag from being deformed or broken during stamping, thereby ensuring the retro-reflective performance and service life of the micro-prismatic reflective film after stamping.

[0009] The Chinese patent announcement number CN106990460A discloses a "micro-prismatic reflective film and its manufacturing method", which includes a transparent base film and a micro-prismatic layer. The micro-prismatic layer is arranged on the surface of the transparent base film. The micro-prismatic layer is a combination of multiple micro-prismatic units. Each micro-prismatic unit includes a first prism and a second prism. The first prism is a triangular pyramid structure and is formed by cutting off one corner at the top angle and the bottom angle, respectively, and has a bottom surface, three side surfaces, three bottom sections and a top section; the second prism is a triangular pyramid structure, respectively having a bottom surface, three side surfaces, a top angle, and three bottom angles. The bottom surface of the first prism and the bottom surface of the second prism are combined with the transparent base film, and the second prism is arranged in the gap between adjacent first prisms. The micro-prismatic reflective film of the utility model can increase the observation angle and reduce the difficulty of demolding. It can be seen from the above-mentioned patent technology solution that, on the one hand, it is difficult to solve the technical problems of the uniformity of the reflected brightness of the existing microprism in all directions of rotation and the high retroreflectivity at small angles but rapid decay at large angles; secondly, the brightness is low at 0.5° and 1°, the reading distance is 100-150m, and when the vehicle speed is above 70km / h, it is difficult to better meet the requirements of driver and passenger for predictive warning.

[0010] In order to solve the above problems, how to provide a prismatic three-dimensional structure reflective film that can meet the large-angle reflective characteristics and when the brightness is low at 0.5° and 1°, the reading distance is 100-150m, and when the vehicle speed is above 70km / h, it cannot meet the requirements of driver and passenger prediction and warning, and can solve the difficult preparation process problems, while improving the preparation efficiency, simplifying the preparation process, and significantly reducing costs and improving economic benefits. Utility model content:

[0011] The utility model aims to provide a prismatic three-dimensional structure reflective film, including a three-dimensional corner unit, or a three-dimensional corner micro-prism unit, which is composed of a composite three-dimensional corner micro-prism unit combination formed by mutually arranging and combining a plurality of three-dimensional corner micro-prism units. While meeting the large-angle reflective characteristics, it greatly improves the effective reflection distance of the reflective mark, better meets the pre-judgment and warning requirements of drivers and passengers, greatly improves driving safety, and has a simple preparation process.

[0012] The utility model aims to provide a full-reflective micro-prismatic stereoscopic film, a prismatic stereoscopic structure reflective film, including a stereoscopic corner unit, the prismatic stereoscopic structure is composed of a composite stereoscopic corner unit combination formed by a plurality of stereoscopic corner units arranged and combined with each other, the composite stereoscopic corner unit combination includes a transverse composite stereoscopic corner unit combination and a longitudinal composite stereoscopic corner unit combination.

[0013] A unit combination;

[0014] The solid corner unit comprises three reflection surfaces and a reflection observation axis R, and a surface opposite to the three reflection surfaces and the reflection observation axis R is set as a bottom surface; one of the three reflection surfaces is a pentagonal reflection surface a' and two quadrilateral reflection surfaces b', c'; the solid corner unit with a three-dimensional structure is formed by the pentagonal reflection surface a', the two quadrilateral reflection surfaces b', c' and the bottom surface opposite thereto; the pentagonal reflection surface a', the two quadrilateral reflection surfaces b', c' and the reflection observation axis R are controlled to intersect and connect to have a common intersection point as point P, and point P is set as the vertex; the reflection observation axis R is controlled to be perpendicular to point P with the pentagonal reflection surface a', and the two quadrilateral reflection surfaces b', c' take the reflection observation axis R as a common side, and are symmetrically and correspondingly arranged on both sides of the reflection observation axis R;

[0015] The two quadrilateral reflecting surfaces b' and c' constituting the solid corner unit are controlled to have the same external structure size and length and width respectively; the projection figure of the solid corner unit from point P to the bottom surface is a rectangle, the length L of the rectangle is controlled to be 0.08-0.35 mm, the width w is controlled to be 0.06-0.15 mm, and the height h between the vertex P where the three reflecting surfaces intersect and the bottom surface of the opposite side of the vertex P in the solid corner unit is controlled to be 0.6-0.9 times of the width;

[0016] The mutual angles between the pentagonal reflecting surface a' and the two quadrilateral reflecting surfaces b' and c' of the three reflecting surfaces of the solid corner unit are controlled to be a, b, and c; the angle between the intersection line of the quadrilateral reflecting surfaces b' and c' and the bottom surface is d, and the angle between the pentagonal reflecting surface a' and the bottom surface is e; the angle ranges of a, b, and c are controlled to be 88° to 89.5°, the angle range of d is 35° to 38°, and the angle range of e is 52° to 58°.

[0017] The prismatic three-dimensional structure reflective film, the transverse composite solid corner unit combination is based on the solid corner unit as the basic constituent element, two solid corner units with the pentagonal reflection surface a' of the solid corner unit as the reference plane are symmetrically arranged and the reflection observation axis R is controlled to be arranged transversely to form a solid corner unit combination transverse unit group, and then every two solid corner unit combination transverse unit groups are arranged in a transverse or longitudinal repeated manner, that is, a transverse composite solid corner unit array combination 2.

[0018] Furthermore, the longitudinal compound solid corner element array combination is based on the solid corner element as the basic constituent element, and two solid corner elements with the pentagonal reflection surface a' of the solid corner element as the reference plane are symmetrically arranged and the reflection observation axis R is simultaneously controlled to be arranged longitudinally to form a solid corner element combination longitudinal unit group, and then every two solid corner element combination longitudinal unit groups are arranged longitudinally or transversely repeatedly with each other, that is, the longitudinal compound solid corner element array combination 3.

[0019] Preferably, the angle between any two correspondingly connected pentagonal reflective surfaces a' in the transverse compound solid corner unit array combination and the longitudinal compound solid corner unit array combination is f, and the angle range of f is controlled to be 65°-75°; and the angle between the quadrilateral reflective surfaces b' and c' of two adjacent units is g, and the angle range of g is controlled to be 89°-91°.

[0020] The prismatic three-dimensional structure reflective film is composed of two arrangement combinations of a transverse composite solid corner unit array combination and a transverse composite solid corner unit array combination or a longitudinal composite solid corner unit array combination and a longitudinal composite solid corner unit array combination, each interval contains 2-8 transverse composite solid corner unit array combinations or 2-8 longitudinal composite solid corner unit array combinations, and the number of transverse composite solid corner unit array combinations and longitudinal composite solid corner unit array combinations in each interval is the same; at the same time, each array is controlled to maintain at least one of the transverse or longitudinal dimensions less than 7.5 mm.

[0021] The utility model discloses a reflective film, and its preparation method is that a full-reflective micro-prism three-dimensional structure array is used as a reflective structure, and the full-reflective micro-prism three-dimensional structure array is spliced ​​into a nickel plate spliced ​​into a cylindrical shape by using an engraved mold template or electroforming replication, and is sleeved on a group of rollers, and the full-reflective micro-prism three-dimensional structure array structure is transferred or copied to the surface of a film to form a reflective layer through UV glue or hot pressing process, so as to obtain a reflective film.

[0022] The utility model discloses a prism stereoscopic reflective film, which has the following beneficial technical effects: the reflective film prepared by the full-reflective micro-prism stereoscopic structure array method of the utility model greatly meets the requirements of large-angle reflective characteristics, such as the effective reflection area of ​​the traditional triangular pyramid at 0° direction is only 45-55%, and the effective reflection area at 90° direction is only 15-25%. However, the full-reflective micro-prism stereoscopic structure array reflective film prepared by the full-reflective micro-prism stereoscopic structure array structure of the utility model has an effective reflection area of ​​100% at 0° direction, and still has an effective reflection area of ​​60-70% at 90° direction; and its effective reflection area at 45° or 135° angle direction is also 80-88%. Second, it greatly improves driving safety. The fully reflective micro-prism three-dimensional structure array reflective film prepared by the utility model is greater than 450 at an angle of 0.5°. At this angle, the driver of the vehicle can predict the distance of 300-400m when in the driving lane or fast lane, and the warning time is 9-12s when the vehicle speed is 120km / h; while the ordinary triangular pyramid of the prior art is about 100-150m, and the warning time is only 3-4.5s when the vehicle speed is 120km / h; in comparison, the warning time is greatly extended, thereby greatly improving driving safety. The detection method of judging the distance: simulate the driver observing the traffic sign on the roadside in the driving state. Description of the drawings:

[0023] Figure 1 , a schematic diagram of the three-dimensional structure of the solid corner unit of the utility model;

[0024] Figure 2 ,for Figure 1 Top view; Top view from point P to the bottom surface or reference plane of the solid corner element;

[0025] Figure 3 ,for Figure 2 Schematic diagram of the cross section along AA, or the schematic diagram of the cross section along the reflection observation axis R;

[0026] Figure 4-1 , a schematic diagram of the 0° observation direction or 0° observation surface of a prismatic three-dimensional structure reflective film prepared by the utility model;

[0027] Figure 4-2 , a schematic diagram of a 45° observation direction or a 45° observation surface of a prismatic three-dimensional structure reflective film prepared by the utility model, the same below;

[0028] Figure 4-3 , which is a schematic diagram of a 135° observation direction of a prismatic three-dimensional structure reflective film prepared by the utility model,

[0029] Figure 4-4 , which is a schematic diagram of a 90° observation direction of a fully reflective micro-prismatic three-dimensional structure reflective film prepared by the utility model,

[0030] Figure 4-1 , Figure 4-2 , Figure 4-3 , Figure 4-4 The diagrams shown are the observation diagrams of the 0° observation plane, the 45° observation plane, the 135° observation plane and the 90° observation plane;

[0031] Figure 5 , is a schematic diagram of the effective reflection area of ​​the existing traditional triangular pyramid in the 0° direction and the 90° direction; Figure 5 The effective reflection area at 0° is 45-55%, while the effective reflection area at 90° is 15-25%.

[0032] Figure 6 , is a schematic diagram of the arrangement of the longitudinal composite solid corner unit array combination of the prism three-dimensional structure reflective film array of the utility model along the horizontal direction;

[0033] Figure 6-1 ,for Figure 6 Schematic diagram of the angle f between the two pentagonal reflecting surfaces a';

[0034] Figure 6-2 ,for Figure 6 Schematic diagram of the angle g between the two quadrilateral reflection surfaces b' and c';

[0035] Figure 6-3 , which is a schematic diagram of the longitudinal arrangement of the longitudinal composite solid corner unit array combination of the prism three-dimensional structure reflective film array of the utility model;

[0036] Figure 6-4 ,for Figure 6-3 A schematic diagram showing that the angle between the two pentagonal reflecting surfaces a' when arranged vertically is f;

[0037] Figure 7 , is a schematic diagram of the arrangement of the lateral composite solid corner unit array combination of the prism three-dimensional structure reflective film array of the utility model along the lateral direction;

[0038] Figure 7-1 ,for Figure 7-2 Schematic diagram of the angle between the two pentagonal reflection surfaces a' is f (bottom);

[0039] Figure 7-2 , which is a schematic diagram of the arrangement of the transverse composite solid corner unit array combination of the mirror three-dimensional structure reflective film of the utility model along the longitudinal direction;

[0040] Figure 7-3 , is a schematic diagram of the angle f between the two pentagonal reflection surfaces a';

[0041] Figure 8 , which is a structural schematic diagram of an implementation mode of a composite arrangement combination of a transverse composite solid corner unit array combination and a longitudinal composite solid corner unit array combination of a prism three-dimensional structure reflective film array of the utility model;

[0042] Fig. 9 , which is a structural schematic diagram of another embodiment of a composite arrangement and combination of a transverse composite solid corner unit array combination and a longitudinal composite solid corner unit array combination of a prism three-dimensional structure reflective film array of the utility model; the observation axis R shown in the figure is the reflection observation axis R described in the specification;

[0043] Fig.10 , is a three-dimensional structure reference schematic diagram of an embodiment of the prism three-dimensional structure reflective film of the utility model. Description. Specific implementation method:

[0044] The utility model is further described in detail below in conjunction with specific implementation methods.

[0045] The following embodiments will help to further understand the present invention, but do not limit the content of the present invention. The reflection observation axis R or the reverse reflection observation axis or the observation axis mentioned in the present invention specification have the same meaning.

[0046] The utility model discloses a prism three-dimensional structure reflective film, and the specific technical scheme is as follows: Figure 1-3 As shown, the fully reflective micro-prism three-dimensional structure array disclosed in the utility model includes a three-dimensional corner unit, wherein the fully reflective micro-prism three-dimensional structure array is composed of a composite three-dimensional corner unit combination formed by a plurality of three-dimensional corner units arranged and combined with each other, and the composite

[0047] The composite solid corner element combination includes a transverse composite solid corner element combination and a longitudinal composite solid corner element combination;

[0048] like Figure 1 , 2 As shown, the solid corner unit of the utility model includes three reflection surfaces and a reflection observation axis R, and a surface opposite to the three reflection surfaces and the reflection observation axis R is set as a bottom surface or a reference surface. Figure 3 As shown; the three reflection surfaces, one of which is a pentagonal reflection surface a' and two quadrilateral reflection surfaces b', c'; the pentagonal reflection surface a', the two quadrilateral reflection surfaces b', c' and the bottom surface opposite thereto together form a solid corner unit of a three-dimensional structure; the pentagonal reflection surface a', the two quadrilateral reflection surfaces b', c' and the reflection observation axis R are controlled to intersect and connect to have a common intersection point as point P, and point P is set as the vertex; the reflection observation axis R is controlled to be perpendicular to point P with the pentagonal reflection surface a', and the two quadrilateral reflection surfaces b', c' use the reflection observation axis R as a common side, and are symmetrically and correspondingly arranged on both sides of the reflection observation axis R, as shown Figure 2 The quadrilateral reflecting surfaces b' and c' are shown on the left and right sides of the observation axis;

[0049] like Figure 2 , 3 As shown, the two quadrilateral reflecting surfaces b' and c' constituting the solid corner unit are controlled to have the same outer structure size and length and width dimensions respectively; the projection figure of the solid corner unit from point P to the bottom surface is a rectangle, the length L of the rectangle is controlled to be 0.08-0.35mm, the width w is controlled to be 0.06-0.15mm, and the height h between the vertex P where the three reflecting surfaces intersect and the bottom surface of the opposite side of the vertex P in the solid corner unit is controlled to be 0.6-0.9 times of the width.

[0050] like Figure 3 As shown, the mutual angles between the pentagonal reflecting surface a' and the two quadrilateral reflecting surfaces b' and c' of the three reflecting surfaces of the solid corner unit are controlled to be a, b, and c; the angle between the intersection line of the quadrilateral reflecting surfaces b' and c' and the bottom surface is d, and the angle between the pentagonal reflecting surface a' and the bottom surface is e; the angle ranges of a, b, and c are controlled to be 88° to 89.5°, the angle range of d is 35° to 38°, and the angle range of e is 52° to 58°.

[0051] like Figure 7 As shown, the transverse composite solid corner unit combination is a solid corner unit as a basic constituent element, and two solid corner units with the pentagonal reflection surface a' of the solid corner unit as a reference plane are symmetrically arranged and the reflection observation axis R is controlled to be arranged transversely to form a solid corner unit combination transverse unit group, and then every two solid corner unit combination transverse unit groups are arranged in a transverse or longitudinal repetitive manner, that is, a transverse composite solid corner unit array combination.

[0052] like Figure 6 As shown in the figures, the longitudinal compound solid corner unit array combination is based on a solid corner unit as a basic constituent element, and two solid corner units with the pentagonal reflection surface a' of the solid corner unit as a reference plane are symmetrically connected and arranged, and the reflection observation axis R is controlled to be arranged longitudinally to form a solid corner unit combination longitudinal unit group, and then every two solid corner unit combination longitudinal unit groups are arranged longitudinally or transversely repeatedly with each other, that is, a longitudinal compound solid corner unit array combination.

[0053] like Figure 6-1 , 6-2, 6-3, and Figure 7-1 As shown in 3, the angle between any two correspondingly connected pentagonal reflection surfaces a' in the transverse compound solid corner unit array combination and the longitudinal compound solid corner unit array combination is f, and the angle range of f is controlled to be 65°-75°; and the angle between the quadrilateral reflection surfaces b' and c' of two adjacent units is g, and the angle range of g is controlled to be 89°-91°.

[0054] Furthermore, it is preferred that the prismatic three-dimensional structure reflective film is composed of two arrangement combinations of a transverse compound solid corner unit array combination and a transverse compound solid corner unit array combination, or a longitudinal compound solid corner unit array combination and a longitudinal compound solid corner unit array combination, each interval contains 2-8 transverse compound solid corner unit array combinations or 2-8 longitudinal compound solid corner unit array combinations, and the number of transverse compound solid corner unit array combinations and longitudinal compound solid corner unit array combinations in each interval is the same; at the same time, each array is controlled to maintain a size of less than 7.5 mm in at least one of the transverse or longitudinal directions.

[0055] The utility model discloses a full-reflection micro-prism three-dimensional structure reflective film which is prepared by arranging and combining a full-reflection micro-prism three-dimensional structure array.

[0056] The utility model discloses a prismatic three-dimensional structure reflective film, which takes a full-reflective micro-prism three-dimensional structure array as the reflective structure. The full-reflective micro-prism three-dimensional structure array is spliced ​​into a nickel plate by using an engraved mold template or electroforming replication to be spliced ​​into a cylindrical shape and sleeved on a group of rollers. The full-reflective micro-prism three-dimensional structure array structure is transferred or copied to the surface of a film to form a reflective layer through UV glue or hot pressing technology to obtain a reflective film.

[0057] The combination of the cube corner element array units of the utility model can be a combination of the lateral and lateral or longitudinal and longitudinal arrangements of the lateral composite cube corner element array combination and the longitudinal composite cube corner element array combination. Figure 6 , 6-2 , 6-3 and Figure 7 , 7-2 As shown, the control can include 2-8 transverse composite solid corner element array combinations or type arrays or 2-8 longitudinal composite solid corner element array combination type arrays in each interval, and keep each array at least one of the transverse or longitudinal dimensions less than 7.5mm. When the dimension is greater than 7.5mm, the directionality of the two combinations will affect the rotation characteristics at close distances; and the number of transverse composite solid corner element array combination type arrays and longitudinal composite solid corner element array combination type arrays in each interval is the same. The schematic diagram of the arrangement and combination in this embodiment is as follows: Figure 8 , Fig. 9 shown.

[0058] The test conditions of the combined solid angle array mold for preparing the full-reflective prism three-dimensional structure reflective film by using the utility model are: standard white light, -4° incident angle, the highest retroreflection coefficient at the observation angle of 0.2°, 50%-85% of 0.2° at the observation angle of 0.5°, and 15%-25% of 0.2° at 1°; the difference of retroreflection coefficient in the four observation directions of 0°, 45°, 90°, and 135° is within ±5%, and the retroreflection characteristics are uniform, showing significant directional characteristics, as shown in Figure 4 and 1-4. The retroreflection coefficient measurement method of the utility model refers to the national standard GB / T-18833-2012.

[0059] Taking white as an example, a typical data example is as follows:

[0060]

[0061] In the example, the fully reflective micro-prismatic reflective film mold has a -4° incident angle and a 0.2° observation angle, and a retroreflection coefficient of 1200-1600 cd / lx / m 2 , 0.5° observation angle retroreflection coefficient 600-950cd / lx / m 2 , 1° observation angle retroreflection coefficient 200-380cd / lx / m 2 .

[0062] The utility model prepares the processing and forming of the reflective film mold, and the micro-prismatic three-dimensional structure reflective film of the utility model is made by using the continuous engraving technology of the existing technology. After the mold design is assembled, the assembled mold template is directly processed through continuous engraving processing, and the template size can be controlled to be between 100mm*100mm and 600mm*600mm. The engraving efficiency and precision are high, and the efficiency of subsequent mold duplication and splicing is improved.

[0063] The forming method of the reflective film of the utility model or the preparation method of the prismatic three-dimensional reflective film is to form the above-mentioned Figure 6 , 7 , 8, etc., are processed and assembled, and then electroformed and replicated to form a nickel plate. The nickel plate is attached to a roller or the nickel plate is spliced ​​into a cylindrical shape and sleeved on a group of rollers. The microprismatic reflective array is transferred or replicated to the surface of the film to form a reflective layer through UV glue or hot pressing process, and then further processed into a finished reflective film material. Except for the explanations, the following embodiments are the same as the above description. For the convenience of explanation, the horizontal composite solid corner unit array combination is called type 2 array, and the vertical composite solid corner unit array combination is called type 3 array, that is, they have the same meaning. In the following embodiments, the pentagon and quadrilateral refer to the pentagonal reflection surface a' and the quadrilateral reflection surfaces b' and c', respectively, which have the same meaning.

[0064] Embodiment 1:

[0065] like Figure 1-3 As shown, if the angle f between any two pentagonal reflecting surfaces a' is set to 61°±20 arc minutes, the angle between the adjacent surfaces of the two quadrilateral reflecting surfaces, i.e., the angle between the quadrilateral reflecting surfaces b' and c', is g, which is 89.8°±20 arc minutes, the angle between the intersection line of the adjacent surfaces and the projection surface is 30°±20 arc minutes, the width w of the projection rectangle of a single unit, i.e., a solid corner unit, is 0.1 mm, the length L is 0.172 mm, and the height from the vertex P of the intersection of the three surfaces to the vertex P to the edge of the pentagonal reflecting surface, i.e., the bottom surface or the reference surface, is 0.07; the angles a, b, and c between the three reflecting surfaces of the solid corner unit are controlled to range from 89° to 91°; and the array is composed of two groups of transverse composite solid corner unit array combination arrays and two groups of longitudinal composite solid corner unit array combination arrays, which are repeatedly arranged; as shown Figure 6 , 7 , 8, etc., that is, the template retroreflection coefficient obtained is -4° incident angle, 0.2° observation angle retroreflection coefficient is 1500cd / lx / m 2 Above, the retroreflection coefficient at 0.5° observation angle is greater than 600cd / lx / m 2 , 1° observation angle retroreflection coefficient greater than 200cd / lx / m 2. The brightness of the final reflective film formed by hot pressing of polycarbonate film is 75%-80% of the mold, and the 0.5° angle is greater than 450. According to experimental tests, the driver of the vehicle in the driving lane or fast lane can predict the distance of 300-400m at this angle, and the warning time is 9-12s when the vehicle speed is 120km / h; while the ordinary triangular pyramid is about 100-150m, and the warning time is only 3-4.5s when the vehicle speed is 120km / h; compared with before, driving safety has been greatly improved. Reading distance detection method: simulate the driver observing the traffic sign on the roadside while driving;

[0066] All the unexplained parts described in the following embodiments are the same as those described in the above-mentioned embodiment 1.

[0067] Embodiment 2:

[0068] like Figure 1-3 As shown, the angle f between the two pentagonal reflective surfaces a' of this embodiment is 71°±20 arc minutes, the angle g between the adjacent surfaces of the quadrilateral is 90.1°±20 arc minutes, the angle between the intersection line of the adjacent surfaces and the projection surface is 35.5°±20 arc minutes, the width of the single unit projection rectangle is 0.1mm and the length is 0.172mm, and the height from the intersection vertex of the three surfaces to the opposite side of the pentagon is 0.08; the type 2 array and the type 3 array are composed of three groups, which are arranged repeatedly. The template retroreflection coefficient obtained is -4° incident angle,

[0069] 0.2° observation angle retroreflection coefficient 1100cd / lx / m 2 Above, 0.5° observation angle retroreflection coefficient 750cd / lx / m 2 above,

[0070] 1° observation angle retroreflection coefficient greater than 300cd / lx / m 2 The final reflective film formed by hot pressing of polycarbonate film has a brightness of 75%-80% of the mold, and the 0.5° angle is greater than 550. At this angle, the driver of the vehicle in the driving lane or fast lane can predict the distance of 400-500m, and the warning time is 12-15s when the vehicle speed is 120km / h; the ordinary triangular pyramid is about 100-150m, and the warning time is 3-4.5s when the vehicle speed is 120km / h. Compared with before, driving safety has been greatly improved.

[0071] Embodiment 3:

[0072] like Figure 1-3As shown, the angle between the opposite faces of the pentagon in this embodiment is 80°±20 arc minutes, the angle between the adjacent faces of the quadrilateral is 90.2°±20 arc minutes, the angle between the intersection line of the adjacent faces and the projection surface is 39.5°±20 arc minutes, the width of the single unit projection rectangle is 0.1mm and the length is 0.172mm, and the height from the vertex of the intersection of the three faces to the opposite side of the pentagon is 0.08; the transverse composite solid corner unit array combination array and the longitudinal composite solid corner unit array combination array are composed of three groups, which are arranged repeatedly. The template retroreflection coefficient obtained is -4° incident angle, 0.2° observation angle retroreflection coefficient is 1100cd / lx / m 2 Above, 0.5° observation angle retroreflection coefficient 800cd / lx / m 2 Above, the retroreflection coefficient at 1° observation angle is greater than 300cd / lx / m 2 The final reflective film is formed by hot pressing of polycarbonate film, and the brightness is 75%-80% of the mold, and the retroreflective coefficient at 0.5° is greater than 600cd / lx / m 2 , the driver of the vehicle can predict the distance of 500-600m in the driving lane or fast lane at this angle, and the warning time is 15-18s when the vehicle speed is 120km / h; the ordinary triangular pyramid is about 100-150m, and the warning time is 3-4.5s when the vehicle speed is 120km / h; compared with the previous, the driving safety is greatly improved. Therefore, the reflective film prepared by the full-reflective micro-prism three-dimensional structure array of the utility model can be applied to highway reflective signs to greatly improve the predictable distance of the vehicle driver in the driving lane or fast lane, thereby correspondingly increasing the driver's reaction time and improving the safe driving distance.

[0073] The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of implementation of the present invention. Anyone familiar with this technology who applies the principles and technical features of the present invention, and makes various changes and decorations, should all be included in the protection scope defined by the claims.

Claims

1. A prismatic three-dimensional structure retroreflective sheeting, comprising a cube corner unit, wherein the prismatic three-dimensional structure is composed of a composite cube corner unit combination formed by mutually arranging and combining a plurality of cube corner units, wherein the composite cube corner unit combination comprises a transverse composite cube corner unit combination and a longitudinal composite cube corner unit combination; wherein: The solid corner unit comprises three reflection surfaces and a reflection observation axis R, and a surface opposite to the three reflection surfaces and the reflection observation axis R is set as a bottom surface; one of the three reflection surfaces is a pentagonal reflection surface a' and two quadrilateral reflection surfaces b', c'; the solid corner unit with a three-dimensional structure is formed by the pentagonal reflection surface a', the two quadrilateral reflection surfaces b', c' and the bottom surface opposite thereto; the pentagonal reflection surface a', the two quadrilateral reflection surfaces b', c' and the reflection observation axis R are controlled to intersect and connect to have a common intersection point as point P, and point P is set as the vertex; the reflection observation axis R is controlled to be perpendicular to point P with the pentagonal reflection surface a', and the two quadrilateral reflection surfaces b', c' take the reflection observation axis R as a common side, and are symmetrically and correspondingly arranged on both sides of the reflection observation axis R; The two quadrilateral reflecting surfaces b' and c' constituting the solid corner unit are controlled to have the same external structure size and length and width respectively; the projection figure of the solid corner unit projected from point P to the bottom surface on the plane is a rectangle, the length L of the rectangle is controlled to be 0.08-0.35 mm, the width w is controlled to be 0.06-0.15 mm, and the height h between the vertex P where the three reflecting surfaces intersect and the bottom surface of the opposite side of the vertex P in the solid corner unit is controlled to be 0.6-0.9 times of the width; The mutual angles between the pentagonal reflecting surface a' and the two quadrilateral reflecting surfaces b' and c' of the three reflecting surfaces of the solid corner unit are controlled to be a, b, and c; the angle between the intersection line of the quadrilateral reflecting surfaces b' and c' and the bottom surface is d, and the angle between the pentagonal reflecting surface a' and the bottom surface is e; the angle ranges of a, b, and c are controlled to be 88° to 89.5°, the angle range of d is 35° to 38°, and the angle range of e is 52° to 58°; The transverse composite cube corner element combination is a cube corner element as a basic component, two cube corner elements with a pentagonal reflection surface a' of the cube corner element as a reference plane are symmetrically arranged and the reflection observation axis R is controlled to be arranged transversely to form a cube corner element combination transverse element group, and then every two cube corner element combination transverse element groups are arranged in a transverse or longitudinal repeating manner to form a transverse composite cube corner element array combination (2); The longitudinal composite solid corner element combination is a solid corner element as a basic component, two solid corner elements with a pentagonal reflection surface a' of the solid corner element as a reference plane are symmetrically arranged, and then the reflection observation axis R is controlled to be arranged longitudinally to form a solid corner element combination longitudinal unit group, and then every two solid corner element combination longitudinal unit groups are arranged longitudinally or transversely repeatedly, that is, a longitudinal composite solid corner element array combination (3); The angle between any two correspondingly connected pentagonal reflective surfaces a' in the transverse composite cube corner element array combination and the longitudinal composite cube corner element array combination is f, and the angle range of f is controlled to be 65°-75°; and the angle between the quadrilateral reflective surfaces b' and c' of two adjacent units is g, and the angle range of g is controlled to be 89°-91°; The invention is composed of two arrangement combinations of a transverse compound solid corner element array combination and a transverse compound solid corner element array combination or a longitudinal compound solid corner element array combination and a longitudinal compound solid corner element array combination, each interval contains 2-8 transverse compound solid corner element array combinations or 2-8 longitudinal compound solid corner element array combinations, and the number of transverse compound solid corner element array combinations and the number of longitudinal compound solid corner element array combinations in each interval are the same; at the same time, each array is controlled to maintain a size of less than 7.5mm in at least one of the transverse or longitudinal directions.

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