JPH0384107A - Non-adhesive sheet material for indicating surface and the like - Google Patents

Abstract

PURPOSE:To stabilize the fixed condition against impact from the outside by setting a sheet-like indicative material on a base sheet manufactured of lead or lead alloy with dead weight so that it corresponds with projections and recessions of a road. CONSTITUTION:A sheet-like indicative material 3 is stuck on a base sheet 2 manufactured of thin lead or lead alloy with a pressure-sensitive adhesive 4 to provide an indication sheet material 1 for a road, etc. A large number of glass beads 5 are buried in the vicinity of the surface of the indicative material 3, and projection and recession continuous patterns having projections 6 and recessions 7 with nununiform forms or fine sizes are formed. To make nonuniform respectively of the depth to bury the glass beads 5, the glass beads are subsequently peeled off from those buried in the shallow depth by bringing into contact with traveling cars, and high reflection intensity is maintained with the elapse of times. According to the constitution, the sheet material adapts itself to the road, and fixed condition can be further stabilized by the passage of cars.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-adhesive marking sheet material that is laid on a road surface or the like for temporary marking purposes.

[Conventional technology]

Conventionally, various types of sheet materials have been used as sheet materials laid on roads and used as road markings. Most of these sheet materials are of the type that is fixed to the road surface with adhesive, but some are simple types such as rubber mats that are simply placed on the road surface without using adhesive. There is also sheet material for road markings.

[Problem to be solved by the invention]

Not all sheet materials used as road markings are used for permanent purposes; for example, sheets are installed temporarily during road construction and removed after the construction is completed; sheets are installed for temporary purposes. There is also. Furthermore, when marking sheet materials are used on roads in various exhibition halls, it becomes necessary to change the marking sheet materials from time to time in response to changes in exhibits.

In this way, when laying road marking sheet materials for temporary use, the conventional marking sheet materials are adhered to the road surface with adhesive, but when they are no longer used, the bonded sheet materials are removed from the road surface. It takes a lot of effort to peel off the sheet material, and the sheet material that has been peeled off cannot be reused, and furthermore, there are disadvantages in that peeling marks remain on the road surface in a dirty state. In addition, before installing marking sheet materials that use adhesives, the road surface or other area must be cleaned and prepared for easy adhesion of the sheet materials. It tends to take too much time and effort to prepare for general use.

Furthermore, sheet materials using such adhesives have the disadvantage that they cannot be constructed in rainy weather.

In addition, marking sheet materials made of rubber mats do not use adhesives, so they do not have the disadvantages mentioned above, but if the rubber mats are thin, they tend to crack due to impact from tires of vehicles running on them, and they have the disadvantage of poor durability. If the rubber mat is made thicker to improve its durability, the rubber elasticity will increase, making it difficult for the mat to conform to uneven road surfaces, making it easier to move due to external shocks, and ensuring stable installation in a designated position. It becomes difficult to put it on.

For the above reasons, conventional sheet materials for road markings, whether they are adhesive type or rubber mat type, each have their own drawbacks when laid for occasional use, and therefore improvements have been made. It has been desired to develop sheet materials for road markings.

Therefore, the present invention has been made in order to solve the above-mentioned problems that occur when laying conventional road marking sheet materials for temporary use. First, it is an object of the present invention to provide a sheet material for marking road surfaces, etc., which can be constructed even in rainy weather, can maintain a stable fixed state by adhering to unevenness of the road surface after being laid, and has great durability.

[Means and effects for solving the problems] The non-adhesive type road marking sheet material of the present invention that achieves the above object is formed by providing a sheet-like marking material on a base sheet made of lead or a lead alloy. It is something.

In the sheet material for marking road surfaces, etc. according to the present invention, the base sheet is made of lead or a lead alloy, so when the sheet material is placed at a predetermined installation location on the ground surface such as a road surface, the sheet material will be affected by its own weight. It sinks to match the unevenness of the road surface and is laid in a shape that conforms to the road surface. In this way-
Once the sheet material is laid on the road surface, the base sheet of the sheet material is in close contact with the unevenness of the road surface, so it does not move easily even when subjected to external impact from driving vehicles or passersby. It is possible to maintain a stable fixed state without any damage. In particular, once a vehicle passes over the sheet material, minute protrusions on the road surface become embedded in the base sheet, making it possible to maintain a stable fixed state.

The base sheet is made of lead or a lead alloy such as lead and zinc or lead and tin, and its thickness is not particularly limited, but is usually 0.
A thickness of approximately 0.05 mm to 2 mm is suitable. Lead has the highest specific gravity among industrial metals, has a low melting point, is rich in plasticity, is flexible, and can be easily molded into any shape, making it the most suitable base sheet for the marking sheet material of the present invention. It has the conditions.

It is desirable that the sheet-shaped marking material provided on the base sheet has sufficient plasticity so that it can plastically deform following the base sheet which deforms in accordance with the unevenness of the road surface. Furthermore, since the marking sheet material is laid on a road surface that is subject to severe impact and wear, it is desirable that the marking sheet material has excellent mechanical durability. For this reason, the main ingredients for marking materials include, for example, acrylonitrile butadiene rubber (NBR), isobutylene isoprene rubber (IIR), chloroprene rubber (CR),
Unvulcanized synthetic rubber such as chlorosulfonated polyethylene or urethane rubber or synthetic resin such as vinyl chloride is used, and if necessary, an appropriate filler such as calcium carbonate powder is added.
Coloring pigments, minute glass beads, wear-resistant particles, etc. are added, and the product is formed into a sheet with a thickness of usually 5 mm or less by rolling.

When adding fine glass beads, those having a particle size of 500 μm or less, usually an average particle size of about 70 to 100 μm, are suitable.

Further, the marking material may have a two-layer structure including a base layer having the above composition and a thin colored layer provided on the base layer. The thin film colored layer on the base layer has the same characteristics as described above for the base layer, and is required to be closely and integrally adhered to the base layer and is colored in a desired color as an indicator of road rMIl. Therefore, it is preferable to use the same type of unvulcanized synthetic rubber or a different type of rubber having the same properties as the unvulcanized synthetic rubber used for the base layer described above, with an appropriate coloring agent added thereto.

The surface shape of the marking material may be one in which a large number of concave and convex continuous patterns are formed on the surface, or it may be in a flat shape.

In order to improve the night visibility of the marking sheet material, glass beads may be embedded in the marking material. When embedding glass beads, particles with a particle size of 1,000 μm or less can be used, but particles with an average particle size of 50 to 500 μm are preferable.

The glass beads may have a refractive index of 1.3 or more, preferably about 1.5 to 2.3. Furthermore, a protective film may be provided on the surface of the marking material in which the glass beads are embedded.

In addition to the above-mentioned materials that are mainly made of rubber or synthetic resin, marking materials include base sheets that deform to match the unevenness of the road surface, such as synthetic materials that combine rubber or synthetic resin with metal foil such as aluminum foil, fibers, etc. Any material can be used as long as it has sufficient plasticity to allow plastic deformation to follow.

A road marking sheet material is formed by bonding the marking material having such a structure onto a base sheet made of lead or a lead alloy using an adhesive. Furthermore, instead of using an adhesive, a road marking sheet material may be formed by pouring a marking material mainly made of rubber or synthetic resin in a molten state onto a base sheet and thermoforming it.

The sheet material for marking road surfaces etc. of the present invention can be used for road marking materials as well as
It can be used for a wide range of marking purposes, such as markings on floors in factories, markings in the aisles of various exhibition halls, markings in the aisles of hotels, etc.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. In each of the embodiments described below, the same parts are designated by the same reference numerals and detailed explanations will be omitted.

FIG. 1 shows one embodiment of the invention. In this example, the sheet material 1 for marking road surfaces, etc. has a thickness of about 1 mm and a width of 1.00 mm.
A sheet-shaped marking material 3 having an average thickness of about 1.5 mm is adhered with a pressure-sensitive adhesive 4 onto a base sheet 2 made of a 0.0 mm lead plate.

In this embodiment, a large number of glass beads 5 are embedded near the surface of the marking material 3 to improve night visibility. On the surface of the marking material 3, a continuous uneven pattern consisting of a large number of fine convex portions 6 and concave portions 7 with non-uniform shapes and dimensions is formed, and a large number of glass beads 5 are formed near the surfaces of these convex portions 6 and concave portions 7. bury it. These glass beads 5 are embedded so that the embedding depths from the surfaces of the convex portions 6 and the concave portions 7 into the marking material 3 are non-uniformly different.

Many of the glass beads 5 are partially exposed from the surface, and the exposed height of each bead is non-uniformly different.

Note that 8 is a wear-resistant particle.

This configuration of the marking material 3 allows high initial brightness to be obtained, and since the embedding depths of the glass beads 5 buried in the vicinity of the surface of the uneven portion vary unevenly, the glass beads may be easily affected by contact with passing vehicles. Since the layers are peeled off sequentially starting from the one with the shallowest embedding depth and do not peel off all at once, high reflective brightness can be maintained over time.

The sheet material 1 for marking road surfaces, etc. of this example was manufactured by the following steps.

The following formulation was used to form sign material 3.

NBR85 (parts by weight) T iO2100 Ca COa 140 Petroleum resin 15 These materials were kneaded and extrusion rolled at a processing temperature of 90°C to a thickness of 1.5 mm and a width of 1.5 mm. It was molded into a sheet of OOO+am.

After a pressure-sensitive adhesive 4 was applied to the upper surface of the lead base sheet 2, the marking material 3 was placed on top of the other and the two were adhered.

Next, Drol was applied in an amount of 5 to 6 g on the surface of the marking material 3, and glass beads 5 having an average particle size of 350 μm and a refractive index of 1.50 were uniformly sprinkled on the undried surface, and the mixture was heated at 80° C. for 5 minutes. Dry.

Next, the laminated body of the base sheet 2 and the marking material 3 is processed at a temperature of 8
Embossing was carried out at 0° C., glass beads 5 were densely embedded in the vicinity of the surface of the uneven portion of the marking material 3, and then dried to obtain a rolled product.

In order to investigate the fixing state of the road surface marking sheet material 1 according to the above example to the road surface, the following experiment was conducted on a roadway.

The road surface marking sheet material 1 according to the above embodiment has a width of 150 mm.
The tape-shaped sheet material 1 was cut into a tape shape with a length of 500 mm, and the tape-shaped sheet material 1 was placed on the road surface, and the conditions in sunny weather and rainy weather were examined. - When a moving vehicle passed over the sheet material 1, the sheet material 1 was fixed to the road surface in a stable state without moving at all even if a vehicle subsequently passed over the sheet material 1. Further, even when the car was stopped on the sheet material 1 and the steering wheel was turned to rotate the wheels on the sheet material 1, the sheet material 1 did not move. The above experiment was conducted on sunny days and rainy days, and the same results were obtained.

FIG. 2 shows another embodiment of the invention. In this embodiment, the marking material 13 of the road surface marking sheet material 1 has an upper layer 13'a made of the same material as the marking material 3 of Example 1, and the upper layer 13'a is made of the same material as chlorinated polyethylene or By adding O and P, the hardness is 30@~75° and the recovery rate is 5
It consists of a lower layer 13'b configured to have a concentration of 0% or less.

By configuring the marking material 13 in this way, it is possible to obtain a sheet material 1 for marking road surfaces, etc., in which the deformation adaptability of the marking material 13 to the base sheet 2 is further improved while sufficiently maintaining the glass beads holding function.

FIG. 3 shows yet another embodiment of the invention. In this embodiment, the marking material 23 is sprinkled on the surface of a colored layer 23b of a laminate consisting of a base layer 23a mainly made of uncured synthetic rubber and a colored layer 23b made of uncured synthetic rubber with a coloring agent added. The lower spherical surface of the glass beads 5 is embedded up to the base layer 23a in the laminate, and the remaining surface of the glass beads 5 and the surface of the laminate are integrally covered with a surface layer 23c of a thin film made of transparent and colorless synthetic resin. It is what it is.

In addition, 9 in the figure is a microscopic glass bead.

By configuring the marking material 23 in this way, the effect of preventing the glass beads 5 from peeling is improved by the cooperation of the three layers: the base layer 23a, the colored layer 23b, and the surface layer 23c.

FIG. 4 shows yet another embodiment of the invention. In this embodiment, the marking material 33 is the marking material 23 of the embodiment of FIG.
A top sheet 33b is attached to a lower sheet 33a consisting of three layers having the same structure as the above. The top sheet 33b has a transparent surface coating layer 38 on the surface of the base layer 37, which has a reflective layer 36 on the back side of the micro glass bead layer 34 via a spacing layer 35.
have. Note that three are adhesive layers formed on the back surface of the reflective layer 36. The reflective layer 36 is made of a metal vapor deposited material such as aluminum and has a thickness of about 200 mm, and the spacing layer 35 and the surface coating layer 38 are made of, for example, a transparent thermosetting acrylic resin having a refractive index of 1.52.

The fine glass beads forming the fine glass bead layer 34 preferably have a refractive index of 1.9 to 2.2 and a particle size of 60 to 90 μm.

By configuring the marking material 33 in this way, extremely good visibility can be maintained even at night in rainy weather.

FIG. 5 shows yet another embodiment of the invention. In this example, a marking material 43 having the same composition and shape as the marking material 3 of the embodiment shown in FIG. 1 except that micro glass beads 9 are added has a refractive index of 1.5 to 1.9. Areas in which glass beads 44 having a refractive index of 2.0 to 2.4 and glass beads 45 having a refractive index of 2.0 to 2.4 are at least partially buried are spaced apart in the longitudinal direction of the marking sheet material 1. or partially continuous.

By configuring the marking material 43 in this way, the area where the glass beads 45 are present has good visibility at night during rainy weather, and in addition to the glass beads 45 when it is other than at night during rainy weather. Since the glass beads 44 contribute to reflective brightness, an excellent all-weather sheet material for marking road surfaces, etc. can be obtained.

FIG. 6 shows yet another embodiment of the invention. In this embodiment, the marking material 53 includes a relatively large-diameter glass bead layer 55 that is at least partially exposed in the air and bonded with a transparent resin 54, and a layer 55 of relatively large-diameter glass beads 55 behind the relatively large-diameter glass beads 55. The relatively large diameter glass beads 5 are in the transparent resin layer 56.
5, a retroreflective sheet 59 having a relatively small-diameter glass beads layer 57 embedded and fixed at intervals from the resin layer, and a reflective layer 58 made of a metal vapor deposited film provided on the back surface of the resin layer; It consists of a lower sheet 60 made of a material such as rubber or synthetic resin bonded to the back of the sheet.

The large diameter glass beads 55 have a particle size of 0.25 to 2 m+s and a refractive index of 1.75 to 2.2, and the small diameter glass beads 57 have a particle size of 53 to 63 μm and a refractive index of 2.0.
-2.2. The transparent resin layers 54 and 56 are preferably made of crosslinked resins, lye polymers, aliphatic urethanes, and polyesters.

By configuring the marking material 53 in this way, each refractive index of the large diameter beads 55, the small diameter beads 57, and the resin layer 54, 56, and the large diameter beads 55 and the small diameter beads 5 can be adjusted.
By appropriately selecting and combining the particle size of No. 7 and the resin spacing between the large-diameter beads 55 and the small-diameter beads, etc., 60@
High retroreflection efficiency can be obtained at such a large incident angle.

〔Effect of the invention〕

As described above, the non-adhesive road surface marking sheet material of the present invention has the following effects by providing a sheet-like marking material on a base sheet made of lead or a lead alloy.

(1) Since lead or lead alloy with a high specific gravity is used as the base sheet, the sheet material sinks to match the unevenness of the road surface due to the base sheet's own weight, and is laid in a shape that conforms to the road surface. , it does not move easily even when subjected to external impact; rather, once a vehicle passes over the sheet material, minute protrusions on the road surface become wedged into the base sheet, resulting in a stable fixed state. can.

(2) Since it can be laid simply by placing the sheet material without using adhesives, there is no need to clean the road surface before laying it, and there is no need to peel off the used sheet material. It does not stain the road surface due to peeling.

(3) Since no adhesive is used, construction can be done even in rainy weather.

(4) The peeled sheet material can be reused any number of times.

(5) Since the marking material is not limited to rubber materials as in conventional rubber mats, a synthetic material with greater mechanical strength than rubber can be selected, and sufficient durability can be obtained.

(6) Since lead has excellent physical properties at low temperatures, the base sheet does not become hard even at low temperatures and blends well with the road surface, making it easy to install even at low temperatures.

[Brief explanation of drawings]

1 to 6 are enlarged schematic cross-sectional views showing respective examples of the non-adhesive type sheet material for marking road surfaces, etc. of the present invention. 1... Sheet material for marking road surfaces, etc., 2... Base sheet 3.13, 23.33, 43.53... Marking material, 4.
··glue. 3a

Claims (1)

[Claims] A non-adhesive sheet material for marking road surfaces, etc., consisting of a sheet-shaped marking material provided on a base sheet made of lead or lead alloy.