Flexible sheet material with elements made in the form of a corner cube, and expansion joints in the form of closed cells and a method for its manufacture

 

(57) Abstract:

The invention relates to devices used for the construction of road surfaces. The inventive material 10 includes a microstructured back-reflecting element 11 many of the elements in the corners of the cube protruding from the first 26 of the base, which is bonded with the sealing element 24. The material 10 is constructed with possibility of extension up to 3% with a minimum of distortion of the elements in the corners of the cube and change between a normal state in which a microstructured element 11 is curved and essentially parallel to the sealing element 24, and a compressed condition in which the microstructured element 11 is curved, and the sealing element 24 is essentially flat. The method consists in applying a microstructured 11 24 and sealing elements with the same speed so that the sealing element 24 is not extended, and elements in the corners of the cube facing the sealing element 24, and bonding the first 26 of the base and the sealing element 24 with each other with the formation of closed cells 17, each of which has a curved microstructured element 11. Invented the ehniki

The present invention relates to a reciprocating-reflecting sheet material, namely a flexible sheet material with elements made in the form of a corner cube, and expansion joints in the form of closed cells, which provides tension and compression of such devices to control traffic, as polymer tables, cones or tubes.

Art

Back-reflecting sheet material has the ability to redirect the light falling on it in the direction of its source. This ability makes extensive use of back-reflecting sheet materials of various products. Very often reflective sheet materials are used on a flat, rigid products, such as road signs and fencing. However, there are often situations when you want to attach the sheet material to uneven or flexible surfaces. For example, back-reflecting sheet material can be attached to the uneven surfaces of devices to regulate traffic, such as polymer tables, cones or tubes. Such devices are usually placed in the vicinity of a road construction project and to indicate safe passage. Back-trilochan use uneven or flexible foundations of back-reflecting sheet material should have good ductility and flexibility provided not at the expense of back-reflective characteristics.

There are also many situations in which the degree of expansion or compression of the underlying basis is different from the degree of tension or compression stroke of the reflective sheet material. For example, if the temperature drops to 40oWith the material of the device to adjust traffic, such as a Cabinet made of low density polyethylene, will be compressed in accordance with its coefficient of linear thermal expansion 20010-6(m/MK) at 20oWith approximately 0.80 per cent. At the same temperature change of back-reflecting sheet material with a layer of polycarbonate will be compressed in accordance with its coefficient of linear thermal expansion 5710-6(m/MK) at 20oWith only by 0.23%. That is, the material of Cabinet is compressed almost 3.5 times more than back-reflecting sheet material. Due to the fact that back-reflecting sheet material wrapped around the outer surface of the tables, commonly used sheet materials can shrink and sink on the Cabinet when the temperature changes. In such cases it is desirable to back-reflecting sheet material adapted is Slavonia from the Foundation.

Mainly use back-reflecting sheet material of two types: "beaded" sheet material and sheet material with elements made in the form of a corner cube. In the "beaded" sheet material to return the reflection of light uses a lot of glass or ceramic microspheres. As the microspheres separated in space, they do not limit the flexibility of the material. However, the sheet material with elements made in the form of a corner cube, a return reflection of the incident light is full of hard, mutually connected elements made in the form of the corners of the cube (see U.S. patent 5450235, Smith et al.). Although described various types of flexible sheet materials, for none of them discussed the need to consider differences in the coefficients of linear thermal expansion of the substrate and back-reflecting sheet material.

One of the ways to obtain tensile, flexible back-reflecting sheet material is described in U.S. patent 3992080 (Rowland). This sheet material has two flexible tensile strips of polymeric material. The first strip is made of transparent synthetic resin on one surface of which there are many chalk is howling strips, when they are both in relaxed condition. The bottom strip is stretched by a certain amount, usually from 3 to 15%, before it is attached to the first strip with elements made in the form of a corner cube. After the operation, the bonding material of the lower strips allow you to return to the relaxed state with formation of a wrinkled sheet of material with elements made in the form of a corner cube. In the relaxed condition, the lower strip is taut, while the strip with elements made in the form of a corner cube is compressed to save smartnote strips with elements made in the form of a corner cube. When applying this sheet material on the non-planar surface, such as a Bicycle wheel, back-reflecting sheet material must be stretched sufficiently to eliminate wrinkles. However, the excessive stretching of the material leads to a distortion of education as elements in the corners of the cube and the corresponding loss of back-reflectivity. The loss of reflective abilities is converted into a loss of brightness, making the sheet material is less effective as a device to ensure safety.

sheet material, which would provide varying degrees of expansion and contraction between the polymer base and the sheet material. It is also desirable to have the sheet material, which would not lose brightness in the result of overstretching or other deformations in the back-reflecting layer with elements made in the form of the corners of the cube.

The invention

The present invention provides a flexible back-reflecting sheet material, which compensates for dimensional changes of basis without prejudice to the back-reflectivity. The present invention also eliminates the need for stretching sheet material to a predetermined length to provide optimum return reflection.

In one example implementation of the present invention includes a microstructured element having a base and a lot of elements made in the form of a corner cube attached to the first side of the base, the sealing element, the mesh structure of intersecting lines, crimping the first side of the base and the sealing element with each other in an ordered pattern of cells, and the adhesive layer (optional). This back-and-reflecting sheet Mat is anitelea element, and a compressed state when the microstructured element curves arc, and the sealing element is essentially flat.

In General, the method of manufacturing a back-reflecting sheet material includes: providing a microstructured element having a base and a lot of elements made in the form of a corner cube protruding from the first side of the base, ensuring the sealing element, the supply of these two elements with approximately the same velocity with elements made in the form of the corners of the cube facing the sealing element, and connecting the first side of the base and the sealing element with each other in an ordered pattern for the formation of closed cells, each of which has a curved microstructured element.

In accordance with this invention the sheet material useful for providing tension and compression devices for the regulation of traffic without prejudice to the back-reflectivity and without the formation of wrinkles on the sheet material. Thanks to the flexibility of the sheet material is also suitable for application to polymeric surfaces, uneven surfaces, such as surface feature is Ortega

In Fig. 1 shows a cross-section of the back-reflecting sheet material with elements made in the form of the corners of the cube, in the normal state according to the present invention;

in Fig.2 shows a cross-section of a microstructured element;

in Fig. 3 shows a cross-section of the back-reflecting sheet material in a compressed state;

in Fig. 4 is a schematic representation of the connection process for producing a sheet material according to the present invention.

These simplified, made not to scale drawings serve only to illustrate the invention but do not restrict it.

Detailed description of the invention

Back-reflecting sheet material according to the invention provides tension and compression devices to control the motion without prejudice to the back-reflectivity, without wrinkles and without damage. The sheet material has a microstructured element compensator in the form of closed cells. The concept of "compensator in the form of a closed cell" means that the element has a curvature. This compensation due to the presence of closed cells allows microstructured element to bend the arc, CT. Conversely, the compensation due to the presence of closed cells allows microstructured element to be straightened to provide a stretching device for adjusting movement with increasing ambient temperature. In addition, a microstructured element compensator in the form of a closed cell takes into account some elongation of the sheet material, which contributes to its application on the device to adjust traffic. The total effect of the present invention is to create a universal back-reflecting sheet material, which can adapt to the difference in expansion and contraction between the device and sheet material and which is easily applied to devices for adjusting movement.

Back-reflecting sheet material according to the present invention can be in normal and stress conditions. The "normal" condition corresponds to the condition when no microstructured element or sealing element is not stretched or not compressed. In this normal condition of a microstructured element has a curvature and is essentially parallel to the sealing element, except for the places where they are fastened masterstone. The sheet material is usually in the normal state after manufacturing.

"Stress state" corresponds to the condition when a microstructured element deviates from its normal state and is, for example, in a compressed or extended condition. The state of "compression" occurs when a microstructured element is curved. An example of the compression status is the situation, when the sheet material is compressed in response to the compression below the base. Sheet material to compensate for this compression by compressing a microstructured element and bending it into the form of an arc. "Elongated" condition occurs when a microstructured element rectified with the elimination of almost all of curvature. An example of the extended state is a state in which the sheet material reacts to stretching under him the basics. Sheet material compensates for expansion by flattening a microstructured element by stretching together with the base. In both stress States of the sealing element remains essentially flat.

I. General structure of the sheet material

In Fig. 1 presents an example microstructuring atno-reflecting sheet material 10 includes a microstructured element 11, bonded to the first side 26 of the sealing element 24 by means of many connection lines 30. As can be seen in Fig.1, microstructured and sealing elements have the same curvature and are essentially parallel to each other. When bonding two elements are formed of closed cell 17, containing air. The cells form a set of polygons. On the second side 28 of the sealing element 24 may be applied an extra layer of adhesive 32 with lining 33, to enable bonding of the sheet material to the surface after removal of the lining.

In Fig.2 presents an example of a microstructured element 11 in accordance with the position 2 in Fig.1, contains many elements made in the form of a corner cube 12 and base 14. The base 14 may include boundary layer 16 and the base layer 18. The elements made in the form of a corner cube, 12 protrude from the first or back side 20 of the base 14. The elements made in the form of a corner cube 12 and the base layer 18 contains a pure polymeric materials. The light enters in a microstructured element 11 through the front surface 21. Then the light passes through the base 14 and falls flat mutually perpendicular Gran arrow 23, as is known from the prior art.

In the preferred construction elements made in the form of a corner cube 12 and boundary layer 16 are made of the same or similar polymers, and boundary layer 16 has a minimum thickness. Usually the boundary layer 16 has a thickness in the range of from about 0-150 μm, and preferably in the range of about 1-100 μm. The core layer 18 typically has a thickness of about 20-1000 μm, and preferably in the range of about 50-250 μm. The elements made in the form of a corner cube 12 typically have a height in the range of about 20-500 μm, and more often in the range of about 60-180 μm. Although an example of carrying out the invention is shown in Fig.2, has one main layer 18, in the scope of the present invention include the provision of more than one base layer 18 in the base 14.

In Fig. 3 shows an example of a microstructured back-reflecting sheet material 10 in a state of stress, when it is attached to the device 50 for adjusting traffic. In particular, the sheet material is in a state of compression when the microstructured element curved in response to the compressive force acting on it when the compression device 50. The temperature drop is one of the device shrinks. The desired sheet material must respond to this compression without the formation of wrinkles, peeling or separation from the Foundation. It is assumed that as the compression of the polymeric device for adjusting traffic, sealing element 24 several relaxes and microstructured element 11 is bent upward arc, adapting to this compression.

To prevent the formation of wrinkles on the sheet material has several advantages. For example, the characteristics of the return reflection sheet material does not deteriorate as the significant curvature of the elements made in the form of a corner cube that is not happening. In addition, the adhesive applied to the sheet material, and the polymer base remain in contact with each other. Consequently, dirt and water can't get in between the adhesive layer and the base, which could lead to exfoliation of the sheet material. Microstructured and sealing elements are described in more detail below.

II. Back-reflecting microstructured

Two main elements of back-reflecting microstructure element is education as elements in the corners of the cube and the base layer. Both elements with the light. Preferably these polymers should skip over 80%, and more preferably more than 90% of the incident light. In addition, a microstructured element maintains good dimensional stability and a high degree of return reflected in the strong bending.

Education in the form of elements made in the form of a corner cube, act as the mechanism of the return reflection. In the art described many configuration elements made in the form of the corners of the cube (see, for example, U.S. patents 4938563 (Nelson et al.), 4775219 (Appeldom), 4243618 (Van Amam), 4202600 (Burke et al.), 3712706 (Stamm) and 4588258 (Hoopman). However, to implement the present invention in practice, it may be preferable configuration of elements made in the form of a corner cube, described in the patent 4588258 (Hoopman), as many considered the examples she provides wide angle return reflection.

Polymeric materials that can be used in elements made in the form of a corner cube must be strong and rigid, and can be thermoplastic. Examples of thermoplastic polymers which can be used in elements made in the form of a corner cube, include acrylic polymers such as polymethyl methacrylate, emery polystyrene, polysulfones, urethanes, including aliphatic and aromatic polyurethanes, mixtures of the above polymers, such as a complex mixture of polyester and polycarbonate and a mixture of fluoropolymer and acrylic polymer.

Other materials that can be used to obtain elements made in the form of a corner cube, which are reactive system resins which can be cross stitched on the mechanism of radical polymerization when exposed to actinic radiation. Such systems are described, for example, in U.S. patent 5450235 (column 6, line 34-68; column 7, lines 1-48).

Polymeric materials used for the manufacture of the boundary layer can be the same polymer that is used to get items made in the form of the corners of the cube, provided that the boundary layer has a minimum thickness. In most cases, the boundary layer is made in one piece with the elements made in the form of a corner cube. The polymers that are used to retrieve items, made in the form of the corners of the cube, and the boundary layer can have a refractive index different from the refractive index of the base layer. Although the boundary layer, it is desirable to obtain a polymer of similar polyliner, than the polymer used in the core layer.

The core layer protects the sheet material from exposure to the environment and can provide the mechanical integrity of the sheet material. He also attached a sheet material ability to bend, curl or bend. Preferred polymeric materials used in the core layer are flexible and resistant to decomposition under the action of ultraviolet radiation materials for back-reflecting sheet material can be used for a long time outdoors. Examples of polymers that may be used in the manufacture of the base layer include fluorinated polymers; ionomer copolymers of ethylene; low density polyethylene; plasticized polyvinylchloride; copolymers of polyethylene and aliphatic and aromatic polyurethanes. Industrial output polyurethanes are: PN03-214 (company Morton International Inc. , Seabrook, New Hampshire) or X-4107 (company B. F. Goodrich Company, Cleveland, Ohio).

For the main base layer can also be used combinations of the above polymers. Preferred polymers for the base layer are: copolym is to copolymers of ethylene and acrylic acid, copolymers of ethylene and methacrylic acid, copolymers of polyethylene and vinyl acetate; ionomer copolymers of ethylene; plasticized poly (vinyl chloride) and aliphatic urethanes. These polymers are preferred for one or more reasons, for example, due to their acceptable mechanical properties, good adhesion to the working layer, transparency and stability under the influence of the environment.

To the base or to the elements made in the form of a corner cube can be added dyes, UV absorbers, light stabilizers, scavengers of free radicals, or oxidants, processing AIDS, such as antiadhesive, mould release preparations, lubricants, and other additives. These components are known in this field and are described, for example, in U.S. patent 5450235 (column 9, line 46-68 and column 10, lines 1-14).

III. Sealing element

Presented on Fig.1 microstructure of back-reflective sheet material 10 of the present invention also includes a sealing element 24. The sealing element provides a mechanism for the formation of closed cells 17 and also protects the elements made in the form of a corner cube 12.

Examples of polymers is aimery polyethylene, alkylen/alkylacrylate copolymers, such as copolymers of ethylene and methyl acrylate, copolymers of ethylene and N-butyl acrylate, copolymers of ethylene and ethyl acrylate, copolymers of ethylene and vinyl acetate, plasticized polymer polyvinyl chloride (PVC) and polyurethane, primed copolymer of ethylene and acrylic acid (EAK). The term "polyurethane" generally refers to polymers having urethane and/or urea links, and such polymers are implied in this case. Also polyurethanes are polyurethanes, polyethers, polyurethanes, polyesters and urethanes polycarbonates. If necessary, there may be used mixtures of such materials.

Acceptable for use in the present invention the polymer EAK is PRIMACORTM3440 (Dow Chemical Co., Midland, Michigan). He is a copolymer of ethylene and acrylic acid, the latter being present in amount of about 9 wt.% based on the total weight of ethylene and acrylic acid; a copolymer has a melt index of about 10.

Plasticized polymer PVC is a material that differs from the plasticized monomer PVC as plasticizers first will not be pricheski properties swinging reflective element.

Preferred polymers for the sealing element are polyurethanes, polyethers, polyurethanes, polyesters, polyurethanes, polycarbonates, which can be aliphatic or aromatic. Can also be used mixtures thereof. Acceptable mixtures contain from about 50 to 99 wt.% complex aliphatic polyetherurethane with from about 1 to 50 wt.% pigmented simple aromatic polyetherurethane. One example of a suitable mixture contains 60 wt.% complex aliphatic polyester polyurethane, which is known as MORTHANETMPN03-214 (company Morton International, Seabrook, New Hampshire) and 40 wt.% pigmented simple aromatic polyetherurethane. Pigmented aromatic simple polyetherurethane also contains 50 wt.% aromatic polyurethane, known as ESTANETM58810 (company B. F. Goodrich Co., Cleveland, Ohio) and 50 wt. % of titanium dioxide, pre-mixed, by appropriate means, for example by using a twin-screw extruder, followed by pelletizing. Another example of an acceptable polyurethane can be obtained by mixing in a twin-screw extruder from about 1 to 50 wt. % of titanium dioxide and aliphatic They have acceptable mechanical properties, stable in the environment, well handled and have good adhesion on microstructured element. The thickness of the sealing element is 25-200 μm and is preferably in the range of 50-130 μm.

III. Methods of making

Back-reflecting sheet materials of the present invention can be manufactured by providing a microstructured swinging reflective element having a base and a lot of elements made in the form of a corner cube protruding from the first side of the base; providing a sealing element; the filing of a microstructured element and the sealing element is roughly the same speed and bonding the first side of the base and the sealing element to each other to form an ordered pattern for the formation of closed cells, each of which has a curved microstructured element. Microstructured and sealing elements can be connected thermally or with the aid of ultrasound.

In the heat treatment process of a microstructured and sealing elements are held together under heat and pressure. Usually one element is EmOC is called "embossing roll", feature exposed face of the embossment. Roller for embossing is typically heated to increase the strength of coupling of the two elements. The temperature to which a heated roller for embossing, depends on what item it comes into contact, and this temperature is in the range of about 193-260oC. Preferably the temperature is in the range of about 204-243oC. Roller for embossing and rubber roller are brought together, with rubber roller exerts pressure on the roller for embossing. The pressure is typically in the range from about 34 to 136 N/a see the Speakers face provide a coupling of the two elements with many intersecting lines connection.

In Fig.4 schematically shows the process of thermal bonding with obtaining the preferred embodiment of the invention. Microstructured element 11 with elements made in the form of a corner cube 12 is unwound from the drum 34. The sealing element 24 is unwound from the drum 36. Usually microstructured element 11 is covered with a protective film 13, which is in contact with the embossing roll 38, rotating with a surface velocity V1. Similarly, the sealing element 24 is covered siast V1and V2approximately equal. The coupling of the two elements is carried out on the protruding edges 40 with the formation of closed cells. In these cells between the microstructure and the sealing elements is usually air.

Preferred thermal bonding process shown in Fig.4, referred to as "front surface" connection, since the roller for embossing contact with the front or microstructured side of the product. In the front-face connection microstructured element of each cell has a curvature and, as they say, is the compensator in the form of closed cells. On the other hand, when the reverse arrangement of elements, in which the heated embossing roll contacts the sealing element, the process is referred to as "back surface" bond.

Instead of thermal energy can also be used ultrasound energy. When this roller for embossing is not heated, and the rubber roller is replaced with a device for supplying ultrasonic energy, for example, a source of ultrasound with a power source.

Any bonding process microstructured element and a sealing element soedinenii enable microstructured element to increase the curvature or erectile in response to resizing devices to control traffic. The preferred polygons are parallelograms, such as rectangles or squares. The length of the rectangles may be in the range of about 5-150 mm, the width of the rectangles may be in the range of about 5-25 mm Width is taken in the longitudinal direction of the sheet material. In one preferred examples of the invention, the back-reflecting sheet material is held together by the figure of repeating rectangles dimensions 12,78,6 mm

On one side of the sealing element may be covered with a layer of glue. The person skilled in the art it is clear that the selected adhesive should be properly linked with the polymer devices to control traffic, which have a low surface energy. Acceptable adhesive can be determined by high tensile strength shear acceptable high tensile peeling and resistance to flaking when testing impregnated with water. One of the acceptable adhesives are adhesive, bonding with pressure, on the basis of synthetic resin with high viscosity.

After fabrication of back-reflecting sheet material may be deposited on polymerisations movement can be made of various polymers. Preferred polymers for the manufacture of devices to control traffic will be selected from the group of polymers, which have a coefficient of linear thermal expansion in the range of 100-250 m/MK at 20oC. in Addition, the ratio of the coefficients of linear thermal expansion device for adjusting the traffic and back-reflecting linear material is at least 1,5:1 and not more than 6:1. Preferred polymers for adjusting devices traffic are low density polyethylene, high density polyethylene, polypropylene, plasticized polyvinyl chloride and their copolymers.

The sheet material may be deposited on the device to adjust traffic manually or by mechanical means described in U.S. patent 5047107 (Keller et aL). When applying sheet material manually to him applied force. The advantage of the present invention is that, due to the microstructured element compensator in the form of a closed-cell, sheet material may give some elongation, usually less than 3%, with a minimum distortion of the elements made in the form of a corner cube. Such lengthening movement, which further facilitates the application of the material manually. As elongation occurs as a result of flattening of a microstructured element with the compensator in the form of a closed cell, there is minimal distortion of the elements made in the form of a corner cube, and therefore, the minimum reduction of brightness.

IV. Examples

The following examples illustrate various embodiments of the invention. However, the specific ingredients and the quantities used, as well as the conditions and details should not be construed as limiting the scope of the invention. Unless otherwise stated, all percentages are weight%.

Example 1 (Comparative)

Back-reflecting microstructured element received in the following way. Molten polycarbonate resin MARKLONTM2407 (company Mobay Corporation, Pittsburgh, Pennsylvania) poured on heated microstructured Nickel snap-containing microcuries prismatic grooves, having a depth of about 86 microns. These grooves are made in the form of corresponding pairs of elements made in the form of the corners of the cube, with the optical axes of which are beveled or inclined at an angle 8,15ofrom the main grooves, as EB/SUP>(420oF). Molten polycarbonate at a temperature 287,8o(550oF) poured on Nickel snap under pressure from approximately 1,03107to 1,38108Pascals (1500-2000 psi) for approximately 0.7 seconds to copy microcuries deepening. Simultaneously with the filling of the cubic recesses on top of the snap-in has placed additional amount of polycarbonate solid boundary layer thickness of about 86 microns. Pre-extruded film of a thickness of 64 μm from aliphatic complex polyetherurethane (MORTHANETMPN03-214, the company Morton International, Seabrook, New Hampshire) was layered on the upper surface of the solid polycarbonate boundary layer at the temperature of this surface is approximately 190o(375oF). This aliphatic complex polyetherurethane defended using films of polyethyleneterephthalate (PET) with a thickness of 61 μm. Nickel snap together with polycarbonate and polyurethane layer cooled by air at room temperature for about 18 seconds before the temperature 71-88o(160-190oF) allowing the layered material to harden with the formation of microstructured element. Then this element, which had a flat drink snap.

Sealing element received in the following way. Was extrudible a complex mixture of aliphatic polyetherurethane (MORTHANETMPN03-214) and 40% complex aromatic polyetherurethane (containing 50% of complex aromatic polyetherurethane (ESTANETM58810 company B. F. Goodrich Co., Cleveland, Ohio) and 50% titanium dioxide, pre-mixed using a twin-screw extruder and pelletized. One side of the sealing element defended using a film made of PET with a thickness of 51 μm.

Then microstructured and sealing elements filed with approximately the same speed in the gap between the embossing roll and a rubber roll having a Durometer 75 Shore A. the embossment on a steel platen had the configuration of rectangles dimensions 0,86 cm2,54 cm (0,341 inch).

Film of PET microstructured element in contact with the rubber roller at the open side with elements made in the form of a corner cube. Film of PET sealing element in contact with a steel embossing roll when you open the sealing element (i.e., implemented back-surface connection). Steel roller for embossing was heated to 216o(420oF). Rollers probrazuetsya connection between the sealing element and the elements, made in the form of the corners of the cube, a microstructured element. Both the protective film from the PET then removed. On the side of the sealing element which is not associated with microstructured element that caused the layer thickness of 63 μm (0,0025 inch) adhesive with pressure adhesive based on synthetic resin with high viscosity.

Received back-reflecting sheet material had essentially smooth microstructured upper surface. This sheet material was applied manually on the device to adjust traffic, such as a Cabinet, described in U.S. patent 5026204 (Kulp et al.). Tables of low density polyethylene (Traffic Devices Inc., San Clemente, California) have a height of about 130 cm and 5 are molded in one piece conical rings, each of which is a little more the next. The base of the Cabinet received a molded separately.

Tables were placed on a rod rotating at a speed of 1.52 m/min (0.5 rpm). Their heated to the temperature of the surface of the 49o(120oF). This heating simulates operating conditions that are used by a number of manufacturers engaged in the application of back-reflecting sheet material, after processing shafts flame. Immediately after naguri (approximately 21oWith or 70oF) sheet material broke away from the tables. It is assumed that since the sheet material has a smooth microstructured element, one of its reaction to the compression of the material tables, was heaving and isolation from the substrate and the formation of such wrinkles.

Therefore, moisture and dirt can accumulate on the plots for these wrinkles, which reduces the brightness. These wrinkles can become the land on which a sheet material is peeled from the walls.

Example 2

Microstructured and sealing elements received in accordance with Example 1 except as follows.

Film of PET microstructured element in contact with a steel embossing roll at the open side with elements made in the form of a corner cube (front-surface bond). Film of PET sealing element in contact with a rubber roller with an open sealing element, as shown in Fig.4. Steel roller for embossing was heated to 243o(470oF). The rollers are rotated with a speed of 1.52 m/min and the force on the gap 86 N/cm to obtain connections between the corners of the cube and open with a microstructured element, paid a layer thickness of 63 μm bonding with pressure adhesive based on synthetic resin with high viscosity.

Received back-reflecting sheet material had essentially microstructured element compensator in the form of a closed cell or curved. The sheet material is applied layer on the pedestal described in Example 1. When cooled cabinets to room temperature (approximately 21o(C) sheet material remained attached to the surface of the cabinets. It is assumed that the closed cells changed shape and arched to accommodate the compression tables.

To determine the increase of curvature was determined by the cell size. Measure two sizes: the height of the closed cells and the basis of closed cells. The Foundation took the length of one side of the polygon. Height was the distance from the midpoint of the base to the top of a microstructured element.

"Table normal" refers to sheet material of this example after the application of glue; "compression state" refers to a sheet material placed on the stand, the temperature of which has been changed from 49 to 4o(From 120 to 40oF). As can be seen from the table, otesaga state to a compression state in response to compression of the material of the tables in the result of temperature changes.

The present invention can have various modifications and alternative examples without departure from the essence and scope. Thus, it is necessary to remember that this invention is not limited by the above description, but should be limited presents the claims and its equivalents.

1. A method of manufacturing a back-reflecting products with expansion joints in the form of closed cells, consisting of a microstructured back-reflecting element with many of the elements in the corners of the cube protruding from the first side of the substrate, and a sealing element, which consists in applying a microstructured and sealing elements with the same speed so that the sealing element is not stretched relative to the microstructured element, and the elements in the corners of the cube converted to the specified sealing element, and bonding the first side of the base and the sealing element to each other to form an ordered pattern for the formation of closed cells, each of which has a curved microstructured element.

2. The method according to p. 1, characterized in that the fastening carry out thermal path.

3. what nouston elements in the corners of the cube, projecting from the first side of the substrate, which is bonded with the sealing element with the formation of an ordered pattern of the cells to obtain the mesh of intersecting lines, and the sheet material is made with possibility of extension up to 3% with a minimum of distortion of the elements in the corners of the cube and change between:

(i) a normal state in which the microstructured element is curved and essentially parallel to the sealing element, and

(ii) a compressed condition in which the microstructured element is curved, and the sealing element is essentially flat.

4. The material on p. 3, characterized in that the elements in the corners of a cube made of polymers selected from the group consisting of acrylic, polycarbonate, polyester, polyurethane and cross-linked acrylates.

5. Back-reflecting device for adjusting traffic containing back-reflecting sheet material, comprising a microstructured back-reflecting element with many of the elements in the corners of the cube protruding from the first side of the substrate, which is bonded with a sealing element with education have an order what hnestly polymer devices when the compression of the specified polymer devices due to the lowering of the ambient temperature specified microstructured element hog, and when the extension of the specified polymer devices with increasing ambient temperature specified microstructured element is flattened.

6. The device under item 5, characterized in that the polymeric device is made of polymers selected from the group consisting of low density polyethylene, high density polyethylene, polypropylene, plasticized polyvinyl chloride and their copolymers.

 

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The invention relates to the field of production of retroreflective materials having high brightness, containing glass beads and functioning as reflective reflectors in all weather conditions, and can be used in technical devices for traffic control, for example for the manufacture of road signs, signs, screens, plates for machinery, special elements for detecting objects in the dark, credit cards, etc

The invention relates to a road marking

The invention relates to the field of road marking, in particular retroreflective marking lines and regulatory signs, as well as methods for their preparation, for example, unidirectional retroreflective marking lines to ensure traffic safety on the highways by the Department and (or) denote the neighboring lanes of traffic with one-way movement from each other, sidewalks on the roadway with controlled traffic, escalators, etc

Marking tape // 2110642
The invention relates to a marking tape used for marking road surfaces

Road markings // 2107126

FIELD: light-reflecting layout materials.

SUBSTANCE: proposed layout material has lines, each line incorporating at least two strings of light-reflecting elements installed in layout material; each light-reflecting element is made in the form of at least part of lens or at least part of phase zone plate, or at least part of Fresnel lens made of material whose reflective index is higher by at least 3% than that of layout material, or it may have reflecting layer applied to rear surface of each lens, zone plate, Fresnel lens, or their parts to produce pattern of respective lens, zone plate, Fresnel lens, or their parts above their respective front surfaces; all strings of lenses, zone plates, Fresnel lenses, or their parts in all respective lines are installed in layout material in common vertical and/or horizontal plane.

EFFECT: enhanced descriptiveness, enlarged functional capabilities, and improved appearance.

32 cl, 9 dwg

FIELD: organic chemistry, technical materials.

SUBSTANCE: invention relates to material used for marking roads with asphalt-concrete coating. Invention describes thermoplastic mastic comprising film-forming polymer, titanium dioxide, plasticizing agents, phototechnical additives and mineral filling agents. Mastic comprises triple acrylic polymer of butyl methacrylate, methacrylic acid and styrene with acid number 6.0-9.0 mg KOH/g, softening point 90-112°C and relative viscosity 1.4-1.8 for 2% solution in butyl acetate as a film-forming agent; mastic comprises a mixture of dibutyl-ortho-phthalate or plasticizer agent EDOS with dimethylterephthalate as plasticizing agents. Mastic comprises organic optical whitening agent, possibly in mixture with glass microbeads as a phototechnical additive, and a mixture of quartz sand and micromarble particles as a mineral filling agent. Proposed mastic provides preparing coating of the best whiteness (above 80%) and less fragility in the broad exploitation temperature range.

EFFECT: improved and valuable properties of mastic.

2 tbl, 1 ex

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