JP2001281428A - Reflection member and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection member 2 capable of retroreflection with a sufficient reflected light quantity even in the case of incident light L with a large incident angle. SOLUTION: A retroreflection sheet 1 with a retroreflection property is attached to a base material 4 so as to form plural projecting parts 3. Even when the light L is made incident on the reflection member 2 with a macroscopically large incident angle (i.e., from an inclined direction nearly parallel with the reflection member 2), the incident angle to the rising part of each projecting part 3 is made small so as to realize the retroreflection with a large light quantity in these parts. Consequently, as a whole, the retroreflection of the light L with the large incident angle is carried out with the sufficient light quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector having retroreflective properties and a method of manufacturing the same, and particularly to a reflector capable of retroreflecting a sufficiently large amount of reflected light even when light is incident at a high incident angle, and a method of manufacturing the same. About the method.

[0002]

2. Description of the Related Art Hitherto, various retroreflective sheets having retroreflectivity (a property of reflecting incident light in the direction of a light source) have been developed, and are widely used for road signs, traffic safety articles, and the like.

[0003]

However, in these retroreflective sheets, a sufficient amount of reflected light is generally obtained only when the incident angle with respect to the normal line of the reflective sheet is within a range of about 30 degrees. , If light is incident from an oblique direction at a larger angle of incidence (high angle of incidence)
The amount of reflected light is greatly reduced. Therefore, for example, the retroreflective sheet 1 installed in a planar shape as shown in FIG.
On the other hand, when light L such as a headlight of an automobile is incident at a large incident angle close to the reflection sheet 1 at night, almost no light is reflected on the light source side, and the For a driver or the like, there is a problem that the reflection sheet 1 is not illuminated at all.

Japanese Patent Application Laid-Open No. Hei 10-111660 proposes a retroreflective sheet capable of improving the reflection efficiency with respect to incident light having a high incident angle by forming a regular uneven pattern. However, this retroreflective sheet must be manufactured by a special manufacturing method using a shape memory resin, and there is a problem that the cost is high.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a reflector capable of retroreflecting a large amount of reflected light with respect to incident light having a high incident angle and a method of manufacturing the same. It is to provide a method.

Another object of the present invention is to provide a reflector which can be manufactured at low cost by using an existing general reflector sheet, and a method of manufacturing the same.

It is another object of the present invention to provide a reflective material which has a sheet shape as a whole and is excellent in handleability and versatility, and a method for producing the same.

[0008] Still other objects of the present invention will become apparent from the following description.

[0009]

SUMMARY OF THE INVENTION The reflector according to the present invention comprises:
It has a base material and a retroreflective sheet having retroreflective properties attached to the base material so as to form a plurality of convex portions.

It is preferable that the convex portion has a shape having a portion which rises obliquely from the base material (it may rise linearly or diagonally or may rise diagonally in a curve). Further, it is preferable that the convex portion is a ridge, particularly a linear ridge extending in a direction parallel to each other.

In the reflector according to the present invention, macroscopically, even when light is incident on the reflector at a high incident angle, the incident angle with respect to the rising portion of each projection becomes small. Retroreflection is performed with a large amount of light. Therefore, retroreflection can be performed with a sufficient amount of incident light having a high incident angle as a whole.

The height of each projection is 3 to 7 mm, and the width of each projection is 2
It is preferable to set the range to 8.5 mm. If the width and height of each convex portion are smaller than the above ranges, problems such as difficulty in forming the convex portion due to the thickness and the like of the reflection sheet and the base material arise. Further, when the height and width of each projection are larger than the above ranges, a problem is likely to occur in the strength of the projection and an increase in manufacturing cost is caused. On the other hand, if the height of each projection is larger than the above range, the thickness of the entire reflecting material is increased, and the entire reflecting material cannot be formed into a sheet having excellent handleability and versatility.

The reflecting material according to the present invention can use an existing general reflecting sheet as the reflecting sheet.
It can be manufactured at low cost.

Further, in the reflecting material according to the present invention, by forming the base material into a sheet shape, the entire reflecting material can also be made into a sheet shape, so that the handleability and versatility can be improved.

One of the manufacturing methods of the reflector according to the present invention is as follows.
A method for producing a reflective material, comprising: a base material; and a retroreflective sheet having a retroreflective property attached to the base material so as to form a plurality of convex portions, wherein the sheet-shaped base material is provided. In a state where the and the retroreflective sheet are superimposed, by pressing the base and the reflective sheet from both sides with a mold having projections and depressions corresponding to the convex portions, the base and the reflective sheet are deformed together. Thus, the convex portions are formed.

Another method of manufacturing a reflecting material according to the present invention is a method of manufacturing a base material including a foamed material, and a retroreflective material having retroreflective properties attached to the base material so as to form a plurality of convex portions. A method of manufacturing a reflecting material comprising a sheet and a sheet having the base material and the reflecting sheet superimposed on each other, by pressing the reflecting sheet side with a mold having projections and depressions corresponding to the projections. The convex material is formed by deforming the foam material and the reflection sheet together.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments.

[0018]

2 and 3 show a first embodiment of the reflector 2 according to the present invention. This embodiment is an example of a case in which the protrusions of the retroreflective sheet 1 form the ridges 3. The retroreflective sheet 1 is bonded to a sheet-like base material 4 made of a metal such as aluminum or an alloy thereof using an adhesive.
The thickness of the substrate 4 is, for example, about 200 to 300 μm, and the thickness of the retroreflective sheet is, for example, about 200 μm. However, these thicknesses may be other values depending on the use conditions and the like.
The retroreflective sheet 1 is bent together with the base material 4 so as to form a plurality of ridges 3 having a triangular cross section extending in parallel with each other. The retroreflective sheet 1 may be of any type such as a prism type, a capsule lens type, and a sealed lens type.

In this reflector 2, as shown in FIG.
Macroscopically, even when the light L is incident on the reflecting material 2 at a high incident angle, each ridge 3 has a triangular cross section.
Since the angle of incidence of each ridge 3 on the slope is small, retroreflection is performed with a large amount of light. Therefore, it is suitable for installation on a facility such as a guardrail, which is installed on the side of a road, or on the side of a large truck.

Preferably, the height H of each ridge 3 is in the range of 3 to 7 mm, and the width of each ridge 3 is in the range of 2 to 8.5 mm.
If the width and height H of each ridge 3 are smaller than the above ranges, problems such as difficulty in forming the ridge 3 due to the thickness and the like of the reflection sheet 1 arise. If the height H and the width of each ridge 3 are larger than the above ranges, a problem is likely to occur in the strength of the ridge 3 and the production cost is increased.
When the height H of each ridge 3 is larger than the above range,
The thickness of the entire reflecting material 2 is increased, and the entire reflecting material 2 cannot be formed into a sheet having excellent handleability and versatility. In order to optimize the reflection characteristics with respect to incident light having a high incident angle, the rising angle θ of the cross section of each ridge 3 is preferably 40 to 80 degrees, and a particularly preferable angle is 60 degrees.

The reflection member 2 can be manufactured at low cost because an existing general reflection sheet can be used as the reflection sheet 1.

Further, the entirety of the reflecting material 2 can be made into a sheet shape, so that the handling property and versatility can be improved.

FIG. 4 shows a second embodiment of the reflector 2 according to the present invention. In the present embodiment, the cross-sectional shape of the ridge 3 formed by the retroreflective sheet 1 is in a semicylindrical shape or an arch shape. Other configurations are the same as those of the first embodiment.

Also in this embodiment, macroscopically, when the light L is incident on the reflector 2 at a high incident angle, the angle of incidence on the obliquely rising portion of each ridge 3 becomes small.
In these portions, retroreflection is performed with a large amount of light. Therefore, retroreflection is performed with a sufficient amount of light even for the light L at a high incident angle as a whole of the reflecting material 2.

FIG. 5 shows a third embodiment of the reflector 2 according to the present invention. In the present embodiment, a substantially flat portion 5 is provided between the ridges 3 in the width direction. Other configurations are the same as those of the reflector 2 of the first embodiment of FIGS. Also in this case, as in the case of the first embodiment, the height H of each ridge 3 is preferably ₃ to 7 mm, and the width W3 of each ridge 3 is preferably in the range of 2 to 8.5 mm. . Further, the rising angle θ of the cross section is preferably set to 40 to 80 degrees, and a particularly preferable angle is 60 degrees. The width W ₅ of the flat portion 5 is preferably set to be 1 to 2 times the width W ₃ of the ridge 3. An adhesive 6 is applied to the back surface of the substrate 4 in the flat portion 5 (the surface of the substrate 4 opposite to the reflection sheet 1). Before the reflective material 2 is used, a release paper (not shown) is attached to the adhesive 6.

In the first and second embodiments, since the adjacent ridges 3 are stuck together, when light is incident at a high incident angle, the adjacent ridges 3 hinder each other, and Since light does not enter the foot portion, the foot portion of each ridge 3 does not substantially function, so that it is useless. When the ridge 3 has a triangular cross section as in the first embodiment of FIGS. 2 and 3, the reflection efficiency is reduced when light is incident at a low incident angle (substantially from the front). The problem also arises. Furthermore, as in the second embodiment of FIG. 4, when the ridges 3 are in the shape of a semicylindrical or arch, when the incident angle of light is particularly large, the vicinity of the top of each ridge 3 (nearly flat). ), And the angle of incidence of the light with respect to the normal to the portion becomes very large, so that retroreflection is not performed.

However, if the flat portions 5 are provided between the ridges 3 as in this embodiment, even when light is incident at a high incident angle,
Since light is incident on the base of each ridge 3 without the adjacent ridges 3 being in the way, the base of each ridge 3 also performs a retroreflective function. Further, when light is incident at a low incident angle (when incident from almost the front), the flat portion 5 efficiently performs retroreflection, so that it is possible to prevent a reduction in the reflection efficiency of the entire reflector 2. Furthermore, even if the ridges 3 are not triangular in cross section and are in the shape of a semicircle or an arch as in the second embodiment of FIG. 4, even if the angle of incidence of light becomes very large, each ridge 3 Light is also incident on the base side of the projections 3 and retroreflection is performed on the base side of each ridge 3, so that it is possible to cope with incident light having a higher incidence angle.

Further, since the back surface of the flat portion 5 can be used as an adhesive surface for an object to which the reflecting material 2 is attached, a wide adhesive area can be secured.

FIGS. 6 and 7 show an embodiment of a method of manufacturing the reflector 2 of the third embodiment shown in FIG. In the embodiment of this manufacturing method, first, as shown in FIG. 6, the base material 4 and the reflection sheet 1 are each in a flat state (in the specification of the present application, “flat” means that it is completely flat. Rather, it means that no projections and depressions corresponding to the ridges 3 are provided). Next, as shown in FIG. 7, the base material 4 and the reflection sheet 1 are transferred to the base material 4 side and the reflection sheet by a pair of dies 9, 10 provided with projections and depressions 7, 8 corresponding to the ridges 3 and the flat portions 5, respectively. The protrusions 3 are formed by pressing from both sides of the first side to deform the base material 4 and the reflection sheet 1 together. Next, the flat portion 5
By applying an adhesive 6 on the back surface of the third embodiment, the reflector 2 of the third embodiment shown in FIG. 5 can be obtained. The bonding between the base material 4 and the reflection sheet 1 may be performed in parallel with the step of pressing with the molds 9 and 10. The application of the adhesive 6 is performed by using the molds 9 and 1.
It is also possible to carry out in advance at a stage where the base material 4 is in a flat state before pressing with 0.

FIG. 8 shows the reflector 2 of the third embodiment shown in FIG.
5 shows another embodiment of the method for producing the. In this embodiment of the manufacturing method, the molds 9 and 10 are respectively provided with irregularities
8 is formed in a roll shape formed on the outer periphery like gear teeth. Also in the present embodiment, the molds 9 and 10 are rotated in opposite directions in a state where they face each other, and the base material 4 and the reflection sheet 1 are passed between these molds 9 and 10 to form the molds 9 and 1.
By pressing the substrate 4 and the reflection sheet 1 with 0, the ridges 3 and the flat portions 5 can be formed in the same manner as in the above embodiment.

The reflector 2 of the first and second embodiments can be manufactured by the same method as that of the embodiment shown in FIGS. In addition, the reflection material 2 of the first, second and third embodiments is, for example, a method in which a flat reflection sheet 1 is pasted on a base material 4 on which a projection corresponding to the ridge 3 is formed in advance. A method of pasting the reflection sheet 1 having a folding habit or a curve corresponding to the ridge 3 in advance on the base material 4 having the projection corresponding to the ridge 3 is conceivable.

FIG. 9 shows a fourth embodiment of the reflector 2 according to the present invention. In the present embodiment, the base material 4 is made of a foamed material such as a foamed plastic material, and the base material 4 completely fills the inside of the ridge 3 having a triangular cross section.
The flat portion 5 is compressed to form a thin layer. An adhesive 6 is applied to the entire back surface of the base material 4,
Before the reflective material 2 is used, a release paper (not shown) is attached to the adhesive 6.

In this embodiment, the same operation and effect as in the case of the reflector 2 of the third embodiment shown in FIG. 5 can be obtained. Further, in the present embodiment, the entire back surface of the base member 4 can be used as an adhesive surface to an object to be attached, so that a wider adhesive area can be secured. Further, the base material 4 made of a foam material
Contributes to the formation of the ridges 3 in the manufacturing process of the reflecting material 2 as described later, and after the manufacturing of the reflecting material 2,
Contributes to the maintenance of ridge 3.

FIGS. 10 and 11 show an embodiment of a method for manufacturing the reflector 2 of the fourth embodiment shown in FIG. In this embodiment of the manufacturing method, first, the base material 4 and the reflection sheet 1 which are bonded to each other with an adhesive in a flat state as shown in FIG. Next, as shown in FIG. 11, a mold 13 provided with projections and depressions 12 corresponding to the flat portions 5 is pressed from the reflection sheet 1 side to deform the base material 4 and the reflection sheet 1 together. , Forming the ridge 3. Next, the reflective material 2 of the fourth embodiment shown in FIG. 9 can be obtained by applying an adhesive 6 to the back surface of the flat portion 5.

In this embodiment, the bonding between the base material 4 and the reflection sheet 1 may be performed in parallel with the step of pressing with the mold 13. Further, the application of the adhesive 6 can be performed in advance at a stage where the substrate 4 is in a flat state before being pressed by the mold 13.

As in the embodiment of the manufacturing method shown in FIG. 8, the mold 13 has the irregularities 12 in the form of a roll provided on the outer periphery like teeth of a gear, and the base 11 has the form of a roll having no irregularities. The base 4 and the reflection sheet 1 may be pressed by the mold 13 by rotating the base 4 and the reflection sheet 1 between them while rotating them in opposite directions while facing each other.

FIG. 12 shows a fifth embodiment of the reflector 2 according to the present invention. The reflecting member 2 of the present embodiment has a sheet-like back-side sheet member 14 made of metal or plastic such as aluminum or its alloy adhered to the back surface of the base member 4 of the reflecting member 2 of the fourth embodiment in FIG. The pressure-sensitive adhesive 6 is applied on the back surface of the back-side sheet member 14 by using an adhesive. In other words, in the present embodiment, the base material 4
Is composed of a foamed material 15 such as a foamed plastic material and a sheet member 14 attached to the back side of the foamed material 15.

In this embodiment, since the base member 4 is reinforced by the sheet member 14, the reflector 2 having a higher mechanical strength than that of the fourth embodiment shown in FIG. 9 can be obtained.

The reflecting material 2 of this embodiment is, for example, a sheet material 14, a foamed material 15, and a reflecting sheet 1 which are adhered in a flat state with an adhesive, as shown in FIGS.
In the same manner as in the embodiment of the first manufacturing method, it can be manufactured by pressing a mold provided with projections and depressions corresponding to the ridges 3 and the flat portions 5 from the reflection sheet 1 side.

FIG. 13 shows a sixth embodiment of the reflector 2 according to the present invention. The reflection material 2 of this embodiment is the same as that of FIG.
The sheet-like front-side sheet member 16 made of metal such as aluminum or an alloy thereof was adhered to the surface side of the base material 4 in the reflecting member 2 of the fifth embodiment, and the reflection sheet 1 was adhered to the front-side sheet member 16. It has a configuration. In other words, in the present embodiment, the base material 4 is a foamed material 15 such as a foamed plastic material, a front side sheet body 16 bonded to the front side of the foamed material 15, and a back side of the foamed material 15. And the back side sheet member 14 provided.

In the case of the reflecting material 2 of the fourth embodiment shown in FIG. 9 and the fifth embodiment shown in FIG. 12, the portion corresponding to the apex of the triangle of each ridge 3 is ideally bent at an acute angle as shown in the figure. Manufacture is difficult in practice, and in practice the parts tend to be quite rounded. However, in this embodiment, since the surface-side sheet body made of metal is provided on the surface side of the base material 4, the portion corresponding to the apex of the triangle of each ridge 3 is bent to a shape close to the ideal shape in the figure. It becomes possible to do.

FIG. 14 shows a seventh embodiment of the reflector 2 according to the present invention. In the present embodiment, the substrate 4 is made of a metal such as aluminum or an alloy thereof or a plastic, and has a flat sheet shape. The retroreflective sheet 1 is bonded to the base material 4 by bending so as to form the ridge 3 and the flat portion 5 having the same triangular cross section as the reflector 2 of the third embodiment in FIG. . Here, a space 17 is formed between the inner surface of the ridge 3 and the substrate 4.

In this embodiment, the same operation and effect as those of the reflecting material 2 of the third embodiment shown in FIG. 5 can be obtained, and the entire back surface of the base member 4 can be used as an adhesive surface to an object. A wider bonding area can be secured.

FIG. 15 shows an eighth embodiment of the reflector 2 according to the present invention. In the present embodiment, a sheet-like base material 4 made of a metal such as aluminum or an alloy thereof and the reflection sheet 1 are laminated and cut and raised at a plurality of locations, and the reflection sheet 1 at the cut and raised portions protrudes. Article 3 is formed. Between each ridge 3, ridge 3
Is formed, and the flat portion 5 is formed. In this embodiment, the same operation and effect as those of the reflector 2 of the third embodiment shown in FIG. 5 can be obtained.

In each of the above embodiments, the cross section of the ridge 3 is triangular, semi-cylindrical, or arched. However, in the present invention, the cross section of the ridge is changed to another shape. Is also good. However, it is preferable that the cross-sectional shape has a portion that rises obliquely.

In each of the above embodiments, the ridges 3 of the reflection sheet 1 are formed in a straight line extending in a direction parallel to each other, but in the present invention, the ridges 3 are not parallel to each other. Alternatively, the protrusion may be configured to bend or bend in an S shape or a zigzag shape when viewed from the front.

Further, in each of the above-described embodiments, the projections of the reflection sheet 1 are formed as the ridges 3. However, in the present invention, the projections of the reflection sheet 1 extend linearly. Instead, it may be configured to be distributed on the reflection sheet 1 in a dot or island shape. The specific shape of the convex portion in this case is also arbitrary, but it is also preferably a shape having an obliquely rising portion such as a pyramid, a truncated pyramid, a cone, a truncated cone, and a dome.

In the case where the reflection sheet 1 forms the linear ridges 3 extending in the direction parallel to each other as in each of the above embodiments,
Retroreflection can be performed on incident light with a high incident angle, for example, when the ridge 3 is used in the up-down direction, only when the incident angle in the horizontal plane is large, When the angle of incidence in the vertical plane increases, retroreflection cannot be performed, so that the direction of the retroreflectivity occurs. However, when the ridges 3 are not parallel to each other as described above, or the ridges 3 are curved or bent in an S-shape, zigzag shape, or the like, or when the protruding portion is formed in a point shape or an island shape, Such directionality can be eliminated or reduced.

However, in a general use situation for traffic safety or the like, the reflector 2 is usually positioned at substantially the same height as a light source such as a headlight of an automobile, and is generally in a vertical state. In practice, the angle of incidence in the vertical plane is rarely large, so it is sufficient to be able to perform retroreflection even when the angle of incidence in the horizontal plane is large. When the incident angle in the inside becomes large, the retroreflection may not be performed. Therefore, in general,
It can be said that it is most preferable to use the projections formed by the reflection sheet 1 as linear projections 3 extending in parallel to each other as in the above embodiments, and to use the projections 3 in the vertical direction.

[0050]

As described above, the reflector according to the present invention is
(A) light incident at a high incident angle can be retroreflected with a sufficient amount of reflected light; (b) it can be manufactured at a low cost using an existing general reflecting sheet; (c) the sheet as a whole As a result, excellent effects such as excellent handleability and versatility can be obtained. In addition, the method for manufacturing a reflector according to the present invention can manufacture a reflector that can obtain such excellent effects.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which light is incident on a flat retroreflective sheet at a high incident angle.

FIG. 2 is a front view showing a first embodiment of the reflector according to the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view showing a second embodiment of the reflector according to the present invention.

FIG. 5 is a cross-sectional view showing a third embodiment of the reflector according to the present invention.

FIG. 6 is a cross-sectional view showing a state before pressing a mold in the embodiment of the method of manufacturing the reflecting material of the third embodiment.

FIG. 7 is a cross-sectional view showing a state where a mold is pressed in the embodiment of the method of manufacturing the reflecting material according to the third embodiment.

FIG. 8 is a sectional view showing another embodiment of the method of manufacturing the reflector according to the third embodiment.

FIG. 9 is a cross-sectional view showing a fourth embodiment of the reflector according to the present invention.

FIG. 10 is a cross-sectional view showing a state before pressing a mold in the embodiment of the method of manufacturing the reflecting material according to the fourth embodiment.

FIG. 11 is a cross-sectional view showing a state where a mold is pressed in the embodiment of the method of manufacturing the reflecting material according to the fourth embodiment.

FIG. 12 is a cross-sectional view showing a fifth embodiment of the reflector according to the present invention.

FIG. 13 is a cross-sectional view showing a sixth embodiment of the reflector according to the present invention.

FIG. 14 is a cross-sectional view showing a seventh embodiment of the reflector according to the present invention.

FIG. 15 is a cross-sectional view showing an eighth embodiment of the reflector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retroreflective sheet 2 Reflective material 3 Ridge (convex part) 4 Substrate 5 Flat part 7,8 type unevenness 9,10 type 12 type unevenness 13 type 14 Back side sheet body 15 Foaming material 16 Front side sheet body

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E01F 9/00 E01F 9/00 5C096 G09F 13/16 G09F 13 / 16F // B29L 7:00 B29L 7: 00 9:00 9:00 11:00 11:00 F term (reference) 2D064 AA12 AA15 AA22 CA01 CA05 DA05 DA08 EB22 EB34 JA01 2H042 EA01 EA12 EA14 EA16 EA17 4F100 AT00A BA02 BA10A BA10B DD04B DJ01A GB90 JN06 YY00B 4F02 AB02 AD05 AD08 AF01 AF14 AG01 AG03 AG05 AG20 AH43 CA17 CB01 CB13 CB20 CB26 CK11 CL02 CQ01 4F208 AB02 AC03 AD03 AD04 AD05 AD08 AF01 AF14 AG01 AG03 AG05 AG20 AH43 MA05 MB01 MB11 MB22 MB29 MC03 MG05 MG13 5C096 AA03 BA03 CE

Claims (19)

[Claims] 1. A reflector comprising: a base material; and a retroreflective sheet having retroreflection properties attached to the base material so as to form a plurality of convex portions. 2. The reflecting material according to claim 1, wherein the projection has a portion rising obliquely. 3. The reflecting material according to claim 1, wherein the height of each projection is 3 to 7 mm. 4. The reflection material according to claim 1, wherein each projection has a width of 2 to 8.5 mm. 5. The reflection material according to claim 1, wherein the projection is a ridge. 6. The reflector according to claim 5, wherein the ridges extend linearly in a direction parallel to each other. 7. The reflector according to claim 5, wherein the ridge has a substantially triangular cross section. 8. The reflector according to claim 7, wherein the rising angle of the cross section is 40 to 80 degrees. 9. The ridge has a substantially semi-cylindrical cross section.
Or the reflector according to 6. 10. A substantially flat flat portion is provided between each convex portion.
Or the reflector according to 9 above. 11. The reflector according to claim 10, wherein the retroreflective sheet has a retroreflective property even in a flat portion. 12. The reflecting material according to claim 10, wherein the convex portion is a ridge having a substantially triangular cross section, and the flat portion has a width of one to two times the width of the convex portion. 13. The reflector according to claim 1, wherein the base material is in a sheet shape. 14. The substrate according to claim 1, wherein the base material has a foam material, and the foam material fills the inside of the projection.
4, 5, 6, 7, 8, 9, 10, 11, 12 or 13
Reflector described. 15. A base material comprising a foam material and a sheet-like sheet bonded to the foam material, wherein the foam material is sandwiched between the sheet and the retroreflective sheet; The foamed material fills the inside of the convex portion, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11.
14. The reflector according to 12 or 13. 16. A base material comprising a foam material and a sheet-like front sheet body and a back sheet body bonded to both sides of the foam material, respectively, and the retroreflective sheet is adhered to the front sheet body. Wherein the foam material fills the inside of the projection.
The reflecting material according to 7, 8, 9, 10, 11, 12 or 13. 17. A sheet-like base material and a retroreflective sheet which are laminated and cut and raised at a plurality of positions, and a convex portion is formed by the retroreflective sheet at the cut and raised portions. 2,3,4,5,6,7,
The reflection material according to 8, 9, 10, 11 or 12. 18. A method of manufacturing a reflecting material, comprising: a base material; and a retroreflective sheet having retroreflection properties attached to the base material so as to form a plurality of convex portions. In a state where the sheet-shaped base material and the retroreflective sheet are overlapped, by pressing the base material and the retroreflective sheet from both sides with a mold having irregularities corresponding to the convex portions, the base material and the retroreflective sheet are pressed. A method of manufacturing a reflecting material for forming the convex portion by deforming a reflecting sheet together. 19. A method for manufacturing a reflecting material, comprising: a base material containing a foam material; and a retroreflective sheet having a retroreflective property attached to the base material so as to form a plurality of convex portions. Then, by pressing the base material and the retroreflective sheet superimposed on each other from the retroreflective sheet side with a mold having irregularities corresponding to the convex portions, the foam material and the retroreflective sheet are joined together. A method for manufacturing a reflective material that forms the convex portion by deforming the reflective material.