KR100815060B1 - Retro-reflective sheeting for the floor - Google Patents

Abstract

The present invention relates to a retro-reflective sheet used on the floor indoors and outdoors, the retro-reflective sheet of the present invention is excellent day and night visibility, compared to the non-reflective form using a conventional paint or sheet, It can attract more attention.

The retroreflective sheet of the present invention can be cut to display a mark of a desired shape on the floor, and a desired pattern or shape is printed on the surface of the retroreflective sheet using a printing method such as solvent printing, UV printing, or thermal transfer printing. It can also be installed on the floor. In this case, the printing surface may be protected by using a polymer film having excellent scratch resistance.

In addition, since the retroreflective sheet of the present invention is laminated with a metal thin film such as aluminum on the back, the workability is excellent and the shape can be maintained well even after construction on the curved portion.

Retro-reflective sheeting, flooring, advertising

Description

Retroreflective sheet used in floor or ground}

1 is a cross-sectional view of the finished retroreflective sheet used for the bottom surface according to an embodiment of the present invention.

2 is a cross-sectional view of the hermetic lens retroreflective layer according to the first embodiment of the present invention.

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<Explanation of symbols for the main parts of the drawings>

10: protective film layer 20: first adhesive layer

30: retroreflective layer 31: surface film layer

32: fine bead fixing resin layer 33: fine bead

34: focus resin layer 35: metal deposition layer

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40: adhesive layer

50: metal thin film layer 60: second adhesive layer

70: release layer

The present invention relates to a reflective sheet that can be installed on the floor surface of the indoor and outdoor, more specifically, the reflective sheet can be cut into a desired shape and attached to the bottom surface, UV ink printing on the surface of the reflective sheet, The present invention relates to a retro-reflective sheet capable of thermal transfer printing and solvent printing, which can be used for advertisements and guided objects by expressing desired figures and graphics.

Republic of Korea Patent Publication No. 2004-1833 uses a variety of paints to adjust the size within the range that can express the directional patterns such as arrows on the front floor of a particular shopping mall, the floor that can focus the passers-by's gaze Signage is disclosed, but in the case of this patent simply advertise on the floor using paint, the painted pattern can be easily removed from the bottom surface, the curved portion does not easily complete the desired pattern.

Korean Patent Laid-Open Publication No. 2002-36815 discloses a post for posting an advertisement on a vehicle floor using a paint and PVC protective film and a method of posting the same.However, in the case of this patent, a paint or anti-reflective sheet is used to complete and protect the design The post-processing process is very complicated and cumbersome.

Korean Utility Model Publication No. 2000-1277 discloses a light reflecting film in which a plurality of negative angle shapes are formed on a bottom surface of a film made of synthetic resin, wherein a light reflecting film is formed below the negative angle shapes of the film. However, the film is used for the coating of road signs or sanitation sources, not at the bottom, and aluminum foil is used as the light reflecting film.

It is an object of the present invention to provide a retroreflective sheet that can be installed on the floor in outdoor, including pedestrians and indoors, including vehicles, department stores.

Another object of the present invention is to provide a retroreflective sheet that can print on a surface and maintain its shape even on a curved bottom surface.

The present invention provides a retro-reflective sheet which is installed on the indoor and outdoor floors, and includes a retro-reflective layer and a metal thin film layer to achieve the above object.

In the present invention, the thickness of the metal thin film layer is preferably 10 to 100 µm, and preferably aluminum.

The retroreflective sheet according to the embodiment of the present invention includes a protective film layer, a first adhesive layer, a retroreflective layer, an adhesive layer, a metal thin film layer, a second adhesive layer, and a release paper layer from above.

In the present invention, the protective film layer is preferably made of an acrylic or polyethylene terephthalate (PET) film as a transparent polymer having excellent scratch resistance.

The retroreflective sheet according to the first embodiment of the present invention is a hermetically sealed lens type including the upper reflective layer, the upper film layer, the fine bead fixation resin layer, the fine bead, the focus resin layer, and the metal deposition layer from above.

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In the present invention, the print layer may be formed on the surface of the retroreflective layer by a printing method such as solvent printing, UV printing, thermal transfer printing, or the like, and may be cut and used as a mark.

The retroreflective sheet of the present invention may be usefully used for floor advertisement or direction guidance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a finished product retroreflective sheet used for the bottom surface according to an embodiment of the present invention, the retroreflective sheet is a protective film layer 10, the first adhesive layer 20, the retroreflective layer 30 from above ), An adhesive layer 40, a metal thin film layer 50, a second adhesive layer 60, and a release paper layer 70.

2 is a cross-sectional view of the hermetic lens retroreflective layer 30a according to the first embodiment of the present invention. The retroreflective layer 30a is a top film layer 31a, a fine bead fixation resin layer 32, and fine particles from above. It consists of the beads 33, the focus resin layer 34, and the metal deposition layer 35, the arrow in the figure shows a path that is reflected back after the light is incident on the microbead (33).

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Representatively, a method of manufacturing the hermetic lens retroreflective sheet shown in FIG. 2 will be described.

First, the upper film layer 31a is formed on one surface of the transparent carrier web, and then the fine bead fixation resin layer 32 is formed thereon, and the fine beads 33 are formed thereon at 30 After forming a single layer so that 70% to 70% of the buried material is formed, the retroreflective layer 30a is manufactured by forming a focal resin layer 34 thereon and then forming a metal deposition layer 35 thereon.

Next, after the adhesive layer 40 is formed on one surface of the separately prepared metal thin film layer 50, it is plywooded with the retroreflective layer 30a.

Next, after the second adhesive layer 60 is formed on the release paper layer 70 having the silicon layer formed on one surface, the second adhesive layer 60 is laminated with the other surface of the metal thin film layer 50 laminated with the retroreflective layer 30a.

Next, after peeling the carrier web, the first adhesive layer 20 is formed on the protective film layer 10 prepared separately, and then plywooded with the upper film layer 31a of the retroreflective layer 30a to complete the product. . At this time, the protective film layer 10 may be plywood after printing the desired pattern or shape by a printing method such as solvent printing, UV printing, or thermal transfer printing on the upper film layer 31a.

The upper film layer 31a may be made of polyurethane resin, vinyl chloride resin, etc., but it is preferable to have basic physical properties by using vinyl chloride resin having excellent elongation and excellent printability of an oil-based inkjet printer. Do.

For example, the upper film layer 31a is a liquid composition in which a vinyl chloride resin having a polymerization degree of 800 to 1,500 is added and mixed with a light stabilizer, a heat stabilizer, and the like, and a small amount of a viscosity control agent for stable continuous operation. It may be made of.

The upper film layer 31a is formed by coating a vinyl chloride resin, a plasticizer, a stabilizer, and the like mixed with a vinyl chloride resin, a plasticizer, and a stabilizer on a PET film that is stable to heat shrinkage by a comma coating method, and then 3 minutes at a high temperature of 100 to 180 ° C. To dry for 5 minutes to form a film layer of 20 to 100 ㎛ thickness.

The microbead fixation resin layer 32 serves to fix the microbead 33 by partially embedding it, for example, in which an acrylic resin having a glass transition temperature (Tg) of 10 ° C. or less is dissolved in a solvent. It may consist of a liquid composition in which the curing agent is uniformly mixed.

As the acrylic resin, an acrylic resin obtained by crosslinking an acrylic resin polymerized from various kinds of acrylate monomers with a curing agent is most suitable. Preferred acrylic resins (polyacrylate) is a homopolymer consisting of one monomer selected from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, hydroxypropyl methacrylate or air composed of two or more monomers. It may be a copolymer.

Acrylic resin may be prepared according to a conventional polymerization method. As a hardening | curing agent of acrylic resin, polyfunctional isocyanate like toluene diisocyanate is especially preferable for thermosetting.

The fine bead fixation resin layer 32 may be coated and formed by a method such as bar coating or comma coating so as to have a thickness of 20 to 40 μm after drying on the upper film layer 31 a.

The microbeads 33 are dispersed in a single layer in the fixing resin layer 32 dried at 60 to 100 ° C. for 1 minute and then additionally dried at a temperature of 100 to 150 ° C. for 1 minute to be embedded and fixed. At this time, the fine beads 33 is preferably about 30 to 70% of the total diameter is embedded in the fixing resin layer (32).

Glass beads, plastic beads and the like can be used as the fine bead 33, the diameter is preferably in the range of 20 to 100 ㎛, particularly in the distribution range of 50 to 80 ㎛.

In particular, in the case of plastic beads having high strength and high transparency, the strength is about 200 times better than that of glass beads, so that it is not easily destroyed even when applied to roads where heavy vehicles pass. As such plastic beads, acrylic resins such as polycarbonate and polymethyl methacrylate (PMMA) having a fall fall strength of 15 to 70 J and transparency of 85 to 95% are preferable.

The focus resin layer 34 has the greatest influence on the retroreflective performance in the hermetic lens-type (lens-embedded) retroreflective sheet. The thickness of the focus resin layer 34 is refracted through the microbeads 33. When the thickness is formed as the distance the light is focused, it shows the best retroreflective brightness.

The material of the focal resin layer 34 is a two-component thermosetting resin of polyester polyol and polyisocyanate or a copolymer of acrylic polyol and acrylate, methyl methacrylate, butyl acrylate, vinyl acetate, and the like, which is crosslinked with polyisocyanate. Liquid type thermosetting resins are preferable.

The focal resin layer 34 is coated on the microbead 33 by a method such as bar coating or comma coating to be 10 to 25 μm in thickness, and then dried at 60 to 100 ° C. for 1 minute to 2 minutes. .

The metal deposition layer 35 serves to return the refracted light while passing through the microbeads 33, that is, the light forms on the surface of the metal deposition layer 35 and is reflected back.

The metal deposition layer 35 may be formed by a conventional method such as vacuum deposition, sputtering deposition, or electron beam deposition. The metal at this time can use gold, silver, aluminum, platinum, nickel, chromium, etc., The deposition thickness is preferably 200 to 800 Pa, particularly preferably 300 to 500 Pa.

The adhesive layer 40 is introduced under the metal deposition layer 35 and serves to secure a bonding force with the metal thin film layer 50. As the component of the adhesive, a polyester polyol and a polyisocyanate-based two-component thermosetting resin composition may be used. The method of forming the adhesive may be 25 to 40 μm in thickness after drying by a method such as gravure coating or comma coating on the metal thin film layer 50. After coating so as to form, it is dried by drying for 1 minute to 2 minutes at 100 ℃.

Subsequently, the adhesive layer 40 is pressed and adhered to the retroreflective layer 30a manufactured from the upper film layer 31a to the metal deposition layer 35 in sequence at the rear of the oven.

The metal thin film layer 50 can be used a variety of metals, but is preferably an aluminum thin film excellent in shape retention, and has a function of long-term stability at the time of construction on the curved or rough surface.

The metal thin film layer 50 should have a sufficient modulus to maintain its shape upon construction on the curved bottom surface. To this end, the thickness of the metal thin film 50 may vary depending on the thickness and the bendability of the retroreflective layer 30, but at least 10 μm or more, preferably 10 to 100 μm, particularly 20 to 50 μm. If the thickness is less than 10 ㎛, it does not contribute to securing stability. If the thickness is over 100 ㎛, the overall thickness and hardness of the product increase, resulting in poor workability and ease of handling of curved or rough surfaces, and continuous workability in roll form. Degrades.

The second adhesive layer 60 freely attaches and fixes the reflective sheet to various kinds of adhered surfaces. In particular, strong adhesives should be used in order to ensure sufficient seating properties during construction on curved and rough surfaces, and known acrylic and rubber adhesives may be used as components of such adhesives, and a small amount of curing agent and additives may be used. It can be used by adjusting the adhesive properties by mixing.

The method of forming the second adhesive layer 60 is coated on the release release layer 70 after the release treatment by coating such as bar coating or comma coating so as to have a thickness of 30 to 80 μm, and then dried at 100 ° C. for about 2 minutes. To form.

Subsequently, the second adhesive layer 60 is pressed and adhered to the semi-finished product formed from the upper film layer 31a to the metal thin film layer 50 at the rear of the oven, and successively peels the carrier film or paper used in manufacturing the upper film layer 31a. do.

The release paper layer 70 may use a release-treated paper of 50 to 150 g / ㎡ or a polyester film or polypropylene film of 25 to 100 ㎛ thickness, the second easy when constructing the retroreflective sheet manufactured It is preferable to peel off from the upper part of the adhesive layer 60.

The first adhesive layer 20 is the same as the second adhesive layer 60 in terms of components and formation methods, and through this, the retroreflective layer 30a and the protective film layer 10 are laminated.

As the protective film layer 10, it is preferable to use a transparent polymer film such as acrylic and PET film having excellent scratch resistance and transparency, thereby protecting the surface of the printed retroreflective layer 30a.

EXAMPLE

First, in order to manufacture the upper film layer 31a, 30 parts by weight of a polyester plasticizer, 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1,000, 2 parts by weight of a barium-zinc-based heat stabilizer, and a benzotriazole-based sunscreen agent 2 parts by weight was uniformly mixed with 30 parts by weight of xylene to prepare a vinyl chloride resin liquid composition. The prepared composition was coated on a heat resistant PET film by a comma coating method, and then heated in an oven at 180 ° C. for 3 minutes to form a top film layer 31a having a thickness of 25 μm after drying.

Next, 20 parts by weight of an acrylic resin having a glass transition temperature of -10 ° C. copolymerized with ethyl acrylate, butyl acrylate and methyl methacrylate was dissolved in 50 parts by weight of toluene, and then 10 parts by weight of a polyisocyanate curing agent was uniformly mixed. A liquid composition for forming the bead fixation resin layer 32 was prepared. The liquid composition was coated on the upper film layer 31a by a comma coating method and dried at 100 ° C. for 1 minute. Then, glass beads having an average diameter of 55 μm were continuously dispersed as a single layer as fine beads 33, and then 150. By further drying at 1 ° C. for 1 minute, a fixed resin layer 32 and a fine bead layer 33 having a thickness of 40 μm after drying were formed.

Next, a conventional polyester polyol and a polyisocyanate-based two-component thermosetting resin composition were coated on the microbeads 33 by a comma coating method, and then heated and cured at 100 ° C. for 1 minute, followed by drying and focusing having a thickness of 18 μm. The resin layer 34 was formed.

Next, aluminum was used as the metal on the dried focus resin layer 34 and a metal deposition layer 35 having a thickness of about 300 kPa was formed at a speed of 250 m per minute using a known vacuum deposition method.

Next, the polyester polyol and the polyisocyanate-based two-component thermosetting resin composition were separately prepared on the aluminum thin film 50 having a thickness of 40 μm by a gravure coating method and then coated to a thickness of 25 μm, followed by drying at 100 ° C. for 1 minute. After the adhesive layer 40 was formed, it was laminated with the retroreflective layer 30a at the rear of the oven.

Next, the adhesive was coated on a release paper 70 having a weight of 100 g / m 2 on one side by a comma coating method, and then dried at 100 ° C. for 2 minutes to form an adhesive layer 60 having a thickness of 60 μm. At this time, the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer 60 is a conventional liquid composition in which an acrylic resin is dissolved in a toluene solvent and a polyisocyanate-based curing agent is uniformly mixed.

Subsequently, the release paper layer 70 was laminated with the laminate of the retroreflective layer 30a and the aluminum thin film layer 50 at the oven tail, and then the carrier used in manufacturing the upper film layer 31a was peeled off.

Next, after the printing layer is formed on the surface of the retroreflective layer 30a by UV printing, the retroreflective layer 30a and the first adhesive layer 20 having the same components as the second adhesive layer 60 are formed. By plywood the protective film layer 10 made of a PET film, a closed lens type retroreflective sheet as shown in FIGS. 1 and 2 was prepared.

[Comparative Example]

Conventional retroreflective sheet is already commercialized, it can be produced through known patent documents and the like. A typical manufacturing process is, for example, first manufacturing a surface film layer, and then sequentially forming a glass bead fixing resin layer, a glass bead layer, a focus resin layer, and a metal deposition layer to prepare a semi-finished product, and then coating an adhesive on a release paper. And the final product can be obtained by plywood with the semifinished product.

As a comparative example, three kinds of products, the main component of the surface film layer made of acrylic resin (B), the product made of polyvinyl chloride resin (C), and the product made of polyester resin (D) were prepared.

[Test Example]

The retroreflective sheet prepared according to the present invention prepared in the above example and the conventional lens-embedded retroreflective sheet prepared in Comparative Example were attached to an adhered surface having a curved surface for each product at room temperature at 23 ° C. and then stored for 3 days. After storage for each condition, the appearance change, ie, the degree of lifting between the curved surface and the retroreflective sheet, was visually determined. The test results were evaluated with four grades of very good (◎), good (O), normal (△), and poor (X).

As a result of the test, as shown in Table 1, there was no significant difference in shape retention performance at room temperature, but the appearance of the retroreflective sheet according to the present invention when compared in a similar condition to the actual use environment in which high temperature and high temperature and low temperature are repeated The retention performance was excellent.

Storage condition Example Comparative Example (B) Comparative Example (C) Comparative Example (D) 23 degrees Celsius * 14 days ◎ ◎ ◎ O 50 ℃ × 14 days ◎ O ◎ △ (50 degrees Celsius * 1 day → 0 degrees Celsius * 1 day) * 10 times ◎ O O X

Retroreflective sheet used for the floor according to the present invention is very excellent day and night visibility compared to the conventional non-reflective type using a paint or anti-reflective sheet can focus the attention and attention of passers-by.

In addition, by printing a desired pattern or graphics on the surface of the reflective sheet can be used for floor advertising. Since a thin film of aluminum or the like is laminated on the back of the sheet, the workability on the curved surface is excellent, and its shape can be maintained continuously after construction. In addition, it is possible to protect the printing surface by using a transparent polymer film such as transparent acrylic and PET film having excellent scratch resistance on the top layer.

Claims (11)

Retro-reflective sheeting on indoor and outdoor floors, including retro-reflective layer and metal thin film layer. The retroreflective sheet according to claim 1, wherein the metal thin film layer has a thickness of 10 to 100 µm. The retroreflective sheet according to claim 2, wherein the metal thin film layer is an aluminum thin film layer. The retroreflective sheet according to claim 1, wherein the retroreflective sheet comprises a protective film layer, a first adhesive layer, a retroreflective layer, an adhesive layer, a metal thin film layer, a second adhesive layer, and a release paper layer from above. The retroreflective sheet according to claim 4, wherein the protective film layer is made of an acrylic or polyethylene terephthalate film. The retroreflective sheet according to claim 1, wherein the retroreflective layer is a sealed lens type including an upper film layer, a fine bead fixation resin layer, a microbead, a focus resin layer, and a metal deposition layer from above. delete delete The retroreflective sheet according to claim 1, wherein a printing layer is formed on a surface of the retroreflective layer. The retroreflective sheet according to claim 1, wherein the retroreflective sheet is cut and used in the form of a mark. The retroreflective sheet according to any one of claims 1 to 6, 9 and 10, wherein the retroreflective sheet is used for floor advertisement or direction guidance.

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