JP3021441B1 - Retroreflective sheet - Google Patents

Abstract

An object of the present invention is to provide a retroreflective sheet which is not only a safety sign for road traffic and also prevents sticking, but also has an improved mounting maintenance property and less hindrance to a removing operation. A base layer of a woven or non-woven fabric sheet having a pattern or the like coated on one side is provided with a glass bead-containing paint layer, an overcoat material layer, and an adhesive rubber adhesive layer on a lower surface for reinforcement and deaeration. The deaeration shaft net and the peeling sheet are sequentially laminated. [Effect] As a road traffic safety sign, it improves the visibility during daytime and nighttime, and also prevents sticking when installing on a structure, etc., improves attachment maintenance, improves workability and removal work. I can figure it out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retroreflective sheet having an easy workability , and more particularly, to a daytime and nighttime visibility sign as a road traffic safety sign and to a non-structural object. The present invention relates to a retroreflection sheet that prevents the occurrence of a problem, improves maintainability during mounting and installation, and has little hindrance to removal work and is easy to install .

[0002]

2. Description of the Related Art Conventionally, a retroreflective sheet using a transparent glass sphere has been obtained by connecting the light refraction effect of a transparent sphere with the reflection effect of a reflective metal powder or a reflective layer. It is also used for road marking, road signs, clothing for traffic related persons, and buildings such as telephone poles and lampposts.
Raises visibility at night and helps traffic safety.
In addition, the retroreflective sheet attached to the building shows advertisements,
Advertisements such as advertising leaflets not only spoil the aesthetics of the city,
Peeling this requires labor and expense, and it is often not possible to completely remove it. For this reason, Japanese Patent Publication No. 53-19914 discloses a building
Japanese Patent Application Laid-Open No. 4-23641 discloses a method for preventing scratches on a paper in which a ball-containing paint is applied or a bead is sprayed on the surface after the application to form small spherical projections on the coating. A pressure-sensitive adhesive layer, a synthetic resin base sheet, a bead-containing paint layer, and a release paint layer, which are sequentially laminated on a sheet, to prevent sticking of a paper, and Japanese Patent Application Laid-Open No. 1-271702. In the gazette,
There has been proposed an adhesive retroreflective sheet comprising an adhesive rubber sheet as a base material and a laminate of a nonwoven fabric layer, a colored adhesive layer, a glass bead, and a weather-resistant synthetic transparent coating.

[0003]

However, for example, in Japanese Patent Application Laid-Open No. 1-271702, when a retroreflective sheet is applied, there are problems such as adhesion strength, irregularities on the surface of an adherend, and the like. Insufficient tracking of irregularities creates voids,
Retroreflective sheeting using an adhesive rubber sheet to improve the point that causes early peeling and affects the durability after construction
However, it cannot be said that the surface does not sufficiently follow the unevenness of the surface to be adhered. The moisture impregnated in the body may be expanded by heating with solar heat, causing swelling.In addition, moisture that has been exposed to rain and wind for a long period of time and has penetrated from the edges and stays in the gaps may cause peeling. There is. Further, it is difficult to remove the retroreflective sheet without leaving any traces of the sticker or the like, and it is difficult to remove the sheet from a building such as a utility pole by replacement work.

In the present invention, in order to solve the above problems,
It has the following configuration. In the present invention, the substrate layer has a weather resistance, using a woven or non-woven sheet made of an inorganic fiber such as a synthetic fiber or a glass fiber such as polyester coated with a figure or pattern on at least one side, Next, a non-vulcanized rubber sheet formed by kneading a tackifier resin, a softener, an antioxidant, a filler, and the like into a natural rubber or a synthetic rubber having a thickness to follow the unevenness of the surface to be bonded and an adhesive durability. The formation of the adhesive layer made of the coating and the bead of the bead-containing coating layer satisfy the necessary and sufficient conditions for exhibiting the retroreflection performance.
A glass bead having a refractive index of 51 or more and a medium refractive index of 1, 90 to 1.95 or less is suitable, and these fine glass beads having substantially the same diameter or irregular particle diameter are bonded at appropriate intervals. can do. Further, a clear paint such as a fluorine-based, acrylic-based, or acrylic copolymer-based coating is applied to the overcoating material layer in order to improve weather resistance. Further, in the present invention, when partially repairing or removing, the retroreflective sheet reinforcing shaft and the deaerating action of the retroreflective sheet according to the present invention satisfying both functions of the retroreflective sheeting and sticking prevention. In order to achieve the effect described above and to facilitate the operation of peeling or removing the pasting paper or the like, a deaeration shaft net made of twisted yarn such as natural fiber, synthetic fiber or glass fiber is provided. The present invention relates to a woven fabric in which a pattern or pattern is printed or painted.
A cloth or nonwoven fabric sheet is used as a base layer, and the printed surface of the base layer is
A bead-containing paint layer and a topcoat material layer are layered, and
Adhesive rubber adhesive layer and thickness of 100 to 1000 denier
Of natural fibers, synthetic fibers, glass fibers, etc.
It consists of a shaft form net, and the intersection density is 2500-4000
Sequential product of deaeration shaft net and peeling sheet of 0 pieces / m ²
Retroreflective system with easy workability
-To provide

Hereinafter, each of the constituent elements of the present invention will be described. In the present invention, a woven or non-woven sheet made of synthetic fiber such as polyester or inorganic fiber such as glass fiber having a weather resistance and coated with a figure or pattern is used for the base material layer. Alternatively, a pulp-blend type non-woven polyester is suitable because it has an affinity for printing ink. It is appropriate that the paint is printed with an outdoor paint having an acrylic resin as a main component and having good weather resistance.

In the present invention, the pressure-sensitive adhesive rubber adhesive layer is composed of a natural rubber having an adhesive durability, a synthetic rubber and a tackifying resin,
It is composed of a non-vulcanized rubber sheet formed by kneading a softener, an antioxidant, a filler and the like, and has excellent adhesion durability, and is preferably a butyl rubber type. Further, as for the adhesive layer, for example, a thin adhesive layer having a thickness of about 50 μm used for packaging is hardly adapted to a rough base such as a structure such as a telephone pole and has poor adhesion durability. . On the other hand, when the thickness is 0.2 mm or more, a cold flow occurs to absorb irregularities of the adherend, and excellent adhesive strength can be obtained. Therefore, the thickness of the adhesive layer is preferably about 0.2 mm to 2 mm. It is.

[0007] The bead-containing paint layer is used as a transparent adhesive.
Acrylic or acrylic copolymer resins are suitable, and the coating amount (solid content) is 10 to 250 g / m ² , preferably 75 to 100 g / m ² . The transparent adhesive is
After spraying onto a base sheet by a reverse roll coater, silk screen printing, or the like, a glass bead is sprayed on the surface in an undried state with an adhesive and fixed. Form spherical small protrusions. The transparent adhesive forming the bead-containing paint layer is not particularly limited as long as it has good adhesion to the glass beads and the base sheet.
It is preferable to use an acrylic emulsion paint for fixing the noise.

When a bead-containing paint is used, it is appropriate that the bead content in the paint is at least 10% by weight or more, and that the glass beads are uniformly scattered on the coating film or different as required. -It can be configured to be fixed in an adhesive state having an irregular diameter.

The glass bead is a spherical lens that utilizes the property of returning reflected light in the direction of incident light, that is, retroreflectivity, for example, for a road sign or a traffic sign, and a glass bead. It is divided into applications that use hardness, chemical resistance, etc. When light is incident on a glass bead, the light is refracted and focused near the back surface (reflection surface) of the sphere. For example, a low refractive index glass bead passes over the back surface of the sphere,
The medium refractive index glass beads are connected on the back surface of the sphere, and the high refractive index glass beads are connected on the inner surface. In the present invention,
Since the glass beads are focused on the back surface of the glass beads, at least a low-refractive-index microsphere having a refractive index of 1.51 or more and a medium refractive index of 1.90 to 1.95 or less is formed. Appropriate. The particle size of the glass beads is 0.025 to 3 mm,
It is preferably from 0.1 to 1.4 mm, and it is appropriate to use a mixture having different particle diameters in order to improve light scattering. Application rates, 500~1500g / m ^2, preferably 600~1000g / m ^2. If necessary, a plastic bead that is stable against a solvent or the like in the paint can be used.

The overcoating material layer is formed by top-coating on the coating layer to which the beads are fixed. In the present invention, for improving the weather resistance, for example, a fluorine-based material is used.
It is suitable to use a clear paint having excellent weather resistance, such as an acrylic or acrylic copolymer. Coating amount is 1 in solid content
The thickness is in the range of 0 to 40 g / m ² , and it is not preferable to apply too thickly because the projection of the fixed beads becomes flat.

In the present invention, the deaerating shaft net has a net mesh of 2 × 2 to 0.000 mesh made of twisted yarn such as natural fiber, synthetic fiber or glass fiber having a thickness of 100 to 1000 denier.
5 × 0.5 / cm interval, intersection density 2500 (20 m / m
Eyes) to 40,000 (5 m / m eyes) pieces / m ² are suitable. In the case of a fine yarn having a thickness of 100 denier or less, air entrapped at the time of sticking or moisture impregnated in the adherend is heated by solar heat to expand and swell. If it is less than 1000 denier, the contact area of the adhesive rubber with the substrate is hindered, resulting in a decrease in adhesive strength. The mesh roughness is 2 × 2 / c
m or less, the adhesion area is reduced by inhibiting the contact area of the adhesive rubber with the base, and 0.5 ×
If it is too coarse, such as at intervals of 0.5 / cm or less, the degassing effect will be reduced. In the case of 250 to 500 denier, the roughness is 2
It is suitably between × 2 and 1 × 1 / cm, and polyester fibers or glass fibers are preferred from the viewpoint of durability.

As the release sheet, paper or a resin film coated with a release resin such as a silicone resin or a fluorine resin can be used. In the present invention, the peeling sheet is perforated or slit to form a peeling sheet.
This makes it easier to turn over and improves the workability.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings as follows.

FIG. 1 is an explanatory cross-sectional view of a retroreflective sheet according to the present invention. A substrate layer 2 of a retroreflective sheet main body 1 is printed or painted with a figure or pattern in advance on the surface side. Made of a woven or non-woven sheet on which the printed layer 3 is laminated,
A bead-containing paint layer 4 and an overcoat material layer 5 are laminated on the upper surface of the printing layer 3, and an adhesive rubber adhesive layer 6 and a deaeration shaft net are provided on the back surface of the base layer 2. 7, a peeling sheet 8 is sequentially laminated.

[0015]

FIG.

FIG. 2 is a cross-sectional view showing another embodiment of the retroreflective sheet according to the present invention. The retroreflective sheet main body 1 has a base material layer 2 on which a printing layer 3 is laminated. A bead-containing paint layer 4 and an overcoating material layer 5 are laminated on the upper surface of the nonwoven fabric sheet, and an adhesive rubber adhesive layer 6 and a deaeration support shaft are provided on the back surface of the base material layer 2. The net 7 and the release sheet 8 are sequentially laminated.
Has a configuration in which a perforated portion 9 subjected to perforation processing or slit processing is formed.

[0017]

FIG. 2

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below.

EXAMPLE 1 A nonwoven polyester fabric having a basis weight of 50 g / m ² and a width of 1000 mm was printed on one side with an acrylic water-based ink (white). Adhesive non-vulcanized butyl rubber having the following composition was adhered to a 0.5-mm-thick fabric, and the polyester biaxial net, yarn thickness 250 denier, intersection density An adhesive sheet was obtained by applying 10,000 pieces / m ² (Kuranet Boseki Co., Ltd., trade name: Clenet E-1100) and a silicone-based release sheet. Compounding composition Butyl rubber 25.0 (parts by weight) Reclaimed butyl rubber 12.0 Tackifier resin 8.0 Softener 12.0 Filler 42.6 Stabilizer 0.4 This is cut into a length of 1200 mm and solid on the printing surface. Acrylic emulsion-based transparent adhesive with a content of 50% was applied at a rate of 200 g / sheet using a flow coater, and a glass bead (refractive index: 1.93, particle size: 2106 to 1400) was applied.
μm, manufactured by Union Corporation, trade name: Uniflash UB-11
(4UF) 878 g / sheet was uniformly dispersed and fixed. Then, a room temperature curing type fluorine-based clear coating material (Newgarmet, trade name, manufactured by Toupe Co., 20% solid content) was added to 10 parts.
After coating with a flow coater at a rate of 0 g / sheet and drying naturally, the sheet was finished and cut to a size of 900 × 1150 mm to obtain a retroreflective sheet. About this thing, JIS
The reflectance measured according to Z9117 “Reflection sheet and tape for security” is 10 cd / m ² l × (observation angle 0.2
゜, incident angle 5 °). Further, in the swelling acceleration test, no abnormality was observed even after 2,000 cycles, and the test piece was firmly adhered to the substrate.

Example 2 Warp yarn thickness 50 denier, weft yarn thickness 75 denier
On one side of 185 polyester woven fabrics
Example 1 A non-printed surface of the woven fabric on which a floral pattern was drawn with an acrylic water-based ink was prepared using a calendar roll machine.
, An adhesive non-vulcanized butyl rubber having the same compounding composition,
Affixed while putting out the dough to 5 mm. Further, a polyester triaxial net (fiber of yarn, 500 denier, intersection density 10,000 pieces / m ² , manufactured by Nitto Boseki Co., Ltd., trade name: triaxial sackcloth) and a silyl type The release sheet was applied to obtain an adhesive sheet. This was cut to a length of 1200 mm, and an acrylic emulsion-based transparent adhesive and a solid content of 50% were applied to the printing surface at a rate of 200 g / sheet using a flow coater. Refractive index 1.93, particle size 106-
1400μ, manufactured by Union Corporation, trade name: Uniflash UB
(-114 UF) 930 g / sheet was uniformly dispersed and fixed. Then, a room temperature curing type fluorine clear paint (Newgarmet, trade name, manufactured by Toupe Co., Ltd., solid content: 20%)
%) At a rate of 100 g / sheet by a flow coater, air-dried, finished to a size of 900 × 1150 mm, and cut. In the second embodiment, the peeling sheet 8 has a cut width of 80 mm in the longitudinal direction and a remaining portion 3.
mm, 150mm and 450mm from both lateral edges
And a retroreflective sheet body 1 was obtained. JIS-
The reflectivity measured in accordance with Z9117 “Reflection sheet and tape for security” is 9 cd / m ² l × (observation angle 0.2
゜, incident angle 5 °). Further, in the swelling acceleration test, no abnormality was observed even after 2,000 cycles, and the sample was firmly adhered to the substrate.

[0021]

The retroreflective sheet according to the present invention, which is easy to construct , has the above-described structure, and can improve visibility during daytime and nighttime as a road traffic safety sign.
Also, when mounted on a structure, etc., the peeling sheet is easy to flip over to improve workability, prevent sticking, and maintainability at the time of mounting and mounting, the deaeration spindle net demonstrates the function, The operation can be improved even in the removal work.

The swelling test was performed in a 300 × 300
20 mm in the center of a flexible board with a thickness of 6 mm and a thickness of 6 mm.
A release paper of a retroreflective sheet cut to a size of 0 × 200 mm was rolled up and adhered. This is placed upright, and after the room temperature water is showered for 5 minutes, heating to 80 ° C. for 25 minutes is repeated, and the occurrence of blisters and the presence or absence of peeling are observed.

[0023]

The retroreflective sheet according to the present invention has the above-described structure, and can improve the visibility at daytime and nighttime as a road traffic safety sign. Also, when mounted on a structure, etc., the peeling sheet is easy to flip over to improve workability, prevent sticking, and maintainability at the time of mounting and mounting, the deaeration spindle net demonstrates the function, The operation can be improved even in the removal work.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a retroreflective sheet according to the present invention.

FIG. 2 is an explanatory sectional view showing another embodiment of the retroreflective sheet according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retroreflective sheet main body 2 Base material layer 3 Printing layer 4 Bead-containing paint layer 5 Top coat material layer 6 Adhesive rubber adhesive layer 7 Deaerating spindle net 8 Peeling sheet 9 Cutting part

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 594158600 1967 Shirokose, Kogo, Iwaoka-cho, Nishi-ku, Kobe-shi, Hyogo 19-72 (72) Inventor Hideki Ishikawa 14 Higashi-Shirashima-cho, Naka-ku, Hiroshima-shi, Hiroshima No. 15 NTT Telecom Engineering, Inc. China (72) Inventor Yukio Jibu 1-12-1 Miyashita, Nishi-ku, Kobe-shi, Hyogo Pref. Worldwide Co., Ltd. (72) Inventor Junsuke Matsui (21) Inventor Tadashi Fujii 2573-1, Kamitakino, Takino-cho, Kato-gun, Hyogo Prefecture Inside Fujii Electric Works Co., Ltd. (72) Inventor Tadahiro Inagaki Hyogo Prefecture 1573-2, Kamitakino, Takino-cho, Kato-gun Inside Fujii Electric Works Co., Ltd. (72) Inventor Yoshinari Sakai 1966, 1966 Shirokose, Kogo Iwaokacho, Nishi-ku, Kobe-shi Sake Co., Ltd. No. 1 of the inventor, Nobuaki Sakai, 1966, Shirokose, Kogo, Iwaokacho, Nishi-ku, Nishi-ku, Kobe, Japan. (56) References JP-A-6-214104 (JP, A) JP-A-64- 59293 (JP, A) JP-A-64-40330 (JP, A) JP-A-6-248775 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 5/128 B32B 7 / 06 C09J 7/02 G09F 13/16 G09F 19/22

Claims (4)

(57) [Claims] 1. A woven or non-woven sheet on which a pattern or pattern is printed or painted is used as a base material layer, and a bead-containing paint layer and an overcoat material layer are layered on a printing surface of the base material layer. On the lower surface, an adhesive rubber adhesive layer and a thickness of 100 to 1000 denier
-Made of twisted yarn such as natural fiber, synthetic fiber, glass fiber, etc.
Consists of a multi-axis form the net, intersection density from 2500 to 4000
An easy- to- install retroreflective sheet comprising a sequential lamination of a deaeration shaft net of 0 pieces / m ² and a peeling sheet. 2. A mixture in which the bead content of the bead-containing paint layer is at least 10% or more, the bead has a refractive index of 1.51 or more, and the particle size ranges from 0.025 to 3 mm. Item 7. A retroreflective sheet according to Item 1 which is easy to construct . 3. The pressure-sensitive adhesive rubber adhesive layer is made of a non-vulcanized type rubber sheet formed by kneading a natural rubber or a synthetic rubber having adhesion durability with a tackifying resin or the like, and has a thickness of 0.2 m.
Claim consists m~2mm range 1 or 2, wherein the workability
Easy retroreflective sheeting. Wherein said peeling sheet - made by applying a perforation processing or slitting to preparative claim 1 or 2 facilities according
Retroreflective sheet with easy workability .