KR20140023211A - Retro-reflective sheet for printing - Google Patents

Retro-reflective sheet for printing Download PDF

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Publication number
KR20140023211A
KR20140023211A KR1020130087066A KR20130087066A KR20140023211A KR 20140023211 A KR20140023211 A KR 20140023211A KR 1020130087066 A KR1020130087066 A KR 1020130087066A KR 20130087066 A KR20130087066 A KR 20130087066A KR 20140023211 A KR20140023211 A KR 20140023211A
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KR
South Korea
Prior art keywords
printing
retroreflective
retroreflective sheet
sheet
film
Prior art date
Application number
KR1020130087066A
Other languages
Korean (ko)
Inventor
김현대
Original Assignee
(주)리플로맥스
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Publication date
Application filed by (주)리플로맥스 filed Critical (주)리플로맥스
Publication of KR20140023211A publication Critical patent/KR20140023211A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00605—Production of reflex reflectors
    • B29D11/00615—Production of reflex reflectors moulded by partially embedding reflective elements, e.g. glass beads, into the surface of a support, e.g. to make prefabricated road markings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
    • G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/136—Reflex reflectors plural reflecting elements forming part of a unitary body
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to a retroreflective sheet for printing suitable for use in advertisements by printing due diligence or a pattern such that the pattern of the surface is not exposed to the outside and the retroreflective efficiency is uniform. Reflective film; A retroreflective sheet for printing comprising a waterproof film adhered to a rear surface of the reflective sheet, wherein the waterproof film is formed on the back surface of the reflective film while forming spot-shaped seals spaced apart from each other by a mesh adhesive portion. It is characterized in that it is configured to be bonded, such a retroreflective sheet for printing is excellent in durability when printing live-action or advertising patterns on the front without vivid distortion and there is no fear of discoloration or discoloration.

Description

Retroreflective sheet for printing {RETRO-REFLECTIVE SHEET FOR PRINTING}

The present invention relates to a retroreflective sheet capable of retroreflecting incident light to a light source side, and in particular, the surface of the surface is not exposed to the outside and the retroreflective efficiency is uniform, so as to print due diligence or patterns for advertisement purposes. A retroreflective sheet for printing suitable for use.

The retroreflective sheet is a synthetic resin reflective sheet that can retroreflect light incident on a surface toward a light source. It is divided into cube corner retroreflective sheet configured to retroreflect by a molded cube corner structure.

The retroreflective sheet has been used mainly for identifying objects at night, such as road signs and safety clothing, but recently, due to the fact that the images are printed on the surface and the images are prominent by the retroreflective at night. Increasingly, consumers are increasingly using it as an advertisement to enhance their images.

Cube corner retroreflective sheet has been mainly used as a retroreflective sheet for printing due diligence or advertisement patterns, which is easy to print because the cube corner retroreflective sheet has a smooth surface unlike glass bead retroreflective sheet. This is because the retroreflective efficiency does not drop significantly after printing. In addition, the cube corner retroreflective sheet has advantages in many ways, such as higher retroreflective efficiency than glass bead retroreflective sheet, and does not lose the retroreflective function even when rain water is on the surface in rainy weather.

On the other hand, the conventional cube corner type retroreflective sheet also had a vulnerability that the image was not clear because the pattern of the adhesive part was exposed to the naked eye and overlaid on the printed image. That is, a waterproof film is adhered to prevent moisture or rain water from penetrating the reflective film so that the cube corner does not lose its retroreflective function. As shown in FIG. The adhesive part 5b for adhering the waterproof film to the reflective film is generally designed in the form of a lattice or honeycomb. When used for printing, the adhesive part 5b is exposed to the printed image. There was a problem of falling sharpness. In addition, unlike the reflective portion 5a retroreflecting to the cube corner, the adhesive portion 5b is embedded in the cube corner and loses the retroreflective function. As the pattern of the adhesive portion 5b is large, the residual portion due to the adhesive portion 5b is lost. Due to the nighttime retroreflective image also had a problem of falling sharpness.

Accordingly, the present applicant has developed and commercialized a retroreflective sheet for printing that can uniformly expose the image in a good state without visual distortion during the day and night when printing a live action or advertisement pattern on the front surface. The retroreflective sheet 6 for printing has a front surface in which the adhesive portions 6b for bonding the waterproof film 62 to the reflective film 61 are dotted patterns, as shown in FIG. Since it is distributed evenly over the screen and is not visually distinguished, it is possible to provide clear print quality without printing image distortion caused by the adhesive part 6b when printing images such as live-action or advertisement, and also receives light at night. The retroreflective image at night also has the advantage of being uniform and clear because it does not make local shadows by uniformly reflecting back evenly through the reflective parts 6a evenly distributed over the entire surface. In addition to the retroreflective sheet commercialized by the applicant, an advertisement sheet that improves the problems of the existing cube corner type retroreflective sheet has been applied for utility model registration and registered (Korean Utility Model Registration No. 20-443878). .

However, the conventional retroreflective sheet 6 for printing, that is, the retroreflective sheet 6 for printing, in which the adhesive parts 6b for adhering the waterproof film 62 are evenly distributed in a dot pattern, the reflective film 61 and the waterproof film 62. Since all the sealed chambers 62a are spatially connected between them, as shown in FIG. 6, when moisture or rainwater 100 penetrates the edge cutouts, it easily spreads to the entire sheet through the sealed chamber 62a. there was. Therefore, when repeatedly exposed to outdoor rainwater, etc., as shown in FIG. 6, since moisture or rainwater 100 soaks into the waterproof film 62 and spreads throughout, the discoloration or discoloration proceeds gradually from the outside to the inside. Not only is the print image progressively damaged, but there is also a problem that the reflex function is lost.

Reference numeral 63, which is not described in FIG. 7, refers to a film protective layer adhered (or coated) on the reflective film 61 to cover and protect the reflective film 61 or the printed layer 64 printed thereon. .

Korea Utility Model Registration No. 20-443878

The present invention has been made to improve the problems of the conventional retroreflective sheet as described above, the gap between the reflective film and the waterproof film while the adhesive parts for attaching the waterproof film to the back of the reflective film evenly distributed. It is an object of the present invention to provide a retroreflective sheet for printing that is spatially isolated from each other in a finely divided state by the microparticles, and thus there is no fear of deterioration of the printed image due to the inflow of rainwater or the like.

It is also an object of the present invention to provide a retroreflective sheet for printing that can transmit light while retaining its own retroreflective function.

The present invention devised to solve the above problems is formed by a cube corner on the back of the reflective film and the reflective film for retroreflecting light incident to the front; In the retroreflective sheet for printing comprising a waterproof film adhered to the rear surface of the reflective sheet to block water from entering the rear surface of the reflective sheet, wherein the waterproof film is separated from each other spatially by a reticulated adhesive. Forming a type sealing portion is characterized in that it is made to adhere to the back of the reflective film.

In the above configuration, it is preferable that the sealing portions have a circular or polygonal average particle diameter of 0.1 to 4.0 mm.

In addition, the total area of the sealing parts is preferably 30 to 70% of the total area of the retroreflective sheeting.

In addition, the reflective film and the waterproof film is preferably a transparent material that can transmit light.

The retroreflective sheet for printing according to the present invention having the above-described configuration does not appear as a pattern evenly distributed throughout the adhesive portion, so that when the photo-realistic or advertising prints are printed on the front surface, the image is in a good state without visual distortion. It can be revealed evenly. In addition, since the sealing parts between the reflective film and the waterproof film are evenly distributed in the form of spots and are separated from each other spatially so that rainwater does not penetrate into the waterproof film, even if repeatedly exposed to rainwater in the outdoors, the discoloration due to the inflow of rainwater, etc. Because there is no fear of discoloration or discoloration, the image of the advertisement printed on the surface can be kept in the initial state for a long time, and the retroreflective function can be maintained in a good state for a long time.

In addition, when the reflective film and the waterproof film are made of transparent materials, light can be transmitted while maintaining the unique function of retroreflection, thereby allowing viewing through the retroreflective film.

1 is a front view of the retroreflective sheet for printing according to an embodiment of the present invention.
2 is a sectional view taken along the line AA in Fig.
Figure 3 is an enlarged front view of the retroreflective sheet for printing according to another embodiment of the present invention.
Figure 4 is an enlarged front view of the retroreflective sheet for printing according to another embodiment of the present invention.
5 is a cube corner type retroreflective sheet front view.
6 is a front view of a conventional retroreflective sheet for printing.
7 is a sectional view taken along line BB of Fig.

Hereinafter, the configuration and operation of the retroreflective sheet for printing according to the present invention will be described in detail through preferred embodiments.

1 is a front view and an enlarged view of a retroreflective sheet for printing according to an embodiment of the present invention, a cross-sectional view is shown in FIG.

As shown, the retroreflective sheet for printing according to an embodiment of the present invention is a reflective film 11 of a light-transmissive material formed in a regular pattern of a cube corner reflective structure on the back, and a reflective film ( 11) It consists of a waterproof film (12), etc., which is adhered to the back surface for waterproof. In addition to the above configuration, the printing retroreflective sheet 1 of the present invention has an ink fixing layer adhered or coated on the reflective film so that the ink 14 can be easily fixed for printing of live action or advertisement images according to the use conditions. Not shown) or a preferred configuration such as a film protective layer 13 adhered or coated on the reflective film 11 to protect the reflective film 11 may be further included.

In the above configuration, the reflective film 11 is an optical film layer that retroreflects the light incident to the front side back to the light source side, and has a cube corner type retroreflective structure on the back surface, that is, a back angle between neighboring sides. The retroreflective structures protruding in the shape of a triangular pyramid approximately 90 degrees are densely arranged and molded. The reflective film 11 is formed of a transparent synthetic resin having a high light transmittance, a high retroreflective efficiency, and a high optical refractive index, which is excellent in optical angle, having high transparency and a refractive index of 1.5 to 1.66. In addition, in order to improve visibility of daytime or nighttime, an opaque pigment or fluorescent colorant, etc., which may increase brightness or fluorescence, may be mixed and molded according to requirements.

The waterproof film 12 is a film adhered to the rear surface of the reflective film 11 in order to prevent deterioration of the reflective film 11 and to allow the cube corners of the reflective film 11 to retroreflect. 11) On the back side, a sealing portion 12a is formed which is spatially disconnected from the outside around the cube corner. Accordingly, the waterproof film 12 covers and protects the rear surface of the reflective film 11 and forms an air layer around the cube corner with the sealing part 12a so that each side of the cube corner has a difference in refractive index between the reflective film 11 and air. By allowing specular reflection according to the cube corners can be retroreflective. In addition, it blocks moisture, rain or dust, and prevents the cube corner from losing its retroreflective function due to moisture or rain.

The waterproof film 12 is usually bonded to the reflective film 11 by thermocompression bonding or an adhesive or any other method. In this embodiment, the waterproof film 12 is applied to the reflective film 1b designed as a mesh by thermocompression bonding. Adhered to (11). The adhesive part 1b is formed along a thermocompression part when the waterproof film 12 is bonded by a thermocompression method, and when the waterproof film 12 is bonded by an adhesive, the adhesive part 1b is formed by applying the adhesive applied on the reflective film 11 or the waterproof film 12. Formed accordingly. The adhesive part 1b may be formed by other adhesive methods in addition to the above two methods. According to the present invention, the adhesive part 1b is uniformly distributed and spaced in a dotted pattern on the front and rear surfaces of the reflective film 11 in any case. The reflective parts 1a and the sealing parts 12a, which are isolated from each other, are formed.

 As the waterproof film 12, a synthetic resin film made of a white material is generally used so that the color of the printing layer on the front surface is well revealed. In some cases, a transparent film having substantially the same refractive index as the reflective film 11 may be used. In this case, the waterproof film 12 is attached to the reflective film 11 with a transparent adhesive. The retroreflective sheet 1 having the transparent waterproof film 12 attached thereto has a function of allowing the opposite side to be viewed or viewed by allowing both the reflective film 11 and the waterproof film 12 to transmit light. Will have.

In the cube corner type retroreflective sheet, the sealing part 12a serves to form and maintain an air layer around the cube corner by closing the cube corner of the reflective film 11 and blocking the inflow of moisture, rainwater, or foreign matter. Accordingly, each of the sealing parts 12a provides different refractive indices of air to each side of the cube corner so that light incident on the reflecting part 1a is mirror-reflected on each side of the cube corner, thereby recursing the reflective film 11. It serves to keep the reflection function good. On the other hand, as shown in FIG. 2, the adhesive part 1b adheres the waterproof film 12 to the reflective film 11, but the cube corners are embedded in the waterproof film 12 or the adhesive, thereby losing the retroreflective function of the cube corner. . As a result, the retroreflective sheet for printing 1 has a characteristic that the lower the area ratio of the adhesive part 1b, the higher the area ratio of the reflecting part 1a and the higher the retroreflective efficiency.

The sealing part 12a is designed without being proposed in shape as a polygon or other shape such as a circle or a square as shown in FIGS. 1, 3, and 4 according to the drawing of the adhesive part 1b. It is designed in a dotted pattern so as to be evenly distributed over the surface. And the average particle diameter (d) is limited to the range of 0.1-4.0 mm, preferably 0.5-2.0 mm, so that the reflecting portions 1a are not easily distinguished from the adhesive portion 1b by the naked eye. In addition, the area ratio directly affecting the retroreflective efficiency, that is, the ratio of the area of the reflective portion 1a to the total surface area of the reflective film 11 is limited to 30 to 80%, preferably 50 to 80%. The reason for limiting the area ratio of the sealing part 12a is that if the area ratio is too high, the area of the adhesive part 1b becomes small accordingly and the adhesion of the waterproof film 12 to the reflective film 11 is weakened, resulting in durability of the sheet. This is because the surface area of the reflecting portion 1a is lowered because the area of the reflecting portion 1a is lowered, resulting in poor visibility at night.

In the retroreflective sheet for printing according to the present invention configured as described above, the sealing parts 12a forming the air layer sealed around the cube corner at the rear surface of the reflective film 11 are evenly distributed and spaced apart from each other. In addition, the reflecting portion 1a and the bonding portion 1b are densely evenly distributed so that the ratio of the size and the area is appropriately adjusted so as not to be distinguished from the naked eye. Thus, when printing an image such as live action or advertisement on the reflective film 11, the image distortion phenomenon due to the adhesive part 1b does not appear, so that the printed image may be clearly expressed. In addition, when the light is received at night, the light is reflected back evenly over the entire surface so as not to make a local shadow, the image seen at night retroreflective is uniform and clear. In the case where the reflective film 11 and the waterproof film 12 are made of a transparent material, light can be transmitted while maintaining the unique function of the retroreflective, so that the opposite side can be viewed or viewed through the retroreflective sheet, and the opposite side as necessary. You can also irradiate light.

1: Retroreflective sheeting 1a: Reflector
1b: bonding portion 11: reflective film
12: waterproof film 12a: airtight chamber

Claims (8)

A reflective film formed on the back of the cube corners in a predetermined pattern to retroreflect light incident to the front; In the retroreflective sheet for printing comprising a waterproof film adhered to the rear surface of the reflective sheet to block water from entering the rear surface of the reflective sheet,
The waterproof film is a retroreflective sheet for printing, characterized in that the adhesive film is made to adhere to the back of the reflective film while forming spatially separated point-pattern seals.
The method of claim 1,
A retroreflective sheet for printing having a uniform retroreflectivity, characterized in that the average particle diameter of the seals is 0.1 to 4.0 mm.
3. The method of claim 2,
A retroreflective sheet for printing having a uniform retroreflectivity, characterized in that the average particle diameter of the sealing portion is 0.5 ~ 2.0 mm.
3. The method of claim 2,
The retroreflective sheet for printing, the retroreflective uniformity, characterized in that each of the sealing portion is circular.
3. The method of claim 2,
The retroreflective sheet for printing, wherein the retroreflectivity is uniform, characterized in that each of the sealing portion is a polygon.
The method according to any one of claims 1 to 5,
A retroreflective sheet for printing having a uniform retroreflectivity, characterized in that the ratio of the closed portion to the total area of the retroreflective sheet is 30 to 80%.
The method according to claim 6,
A retroreflective sheet for printing having a uniform retroreflectivity, characterized in that the ratio of the closed portion to the total area of the retroreflective sheet is 50 to 80%.
The method according to any one of claims 1 to 5,
The waterproof film is a retroreflective sheet for printing, the retroreflective uniformity, characterized in that the transparent material.
KR1020130087066A 2012-08-16 2013-07-24 Retro-reflective sheet for printing KR20140023211A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120089614 2012-08-16
KR20120089614 2012-08-16

Publications (1)

Publication Number Publication Date
KR20140023211A true KR20140023211A (en) 2014-02-26

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KR1020130087066A KR20140023211A (en) 2012-08-16 2013-07-24 Retro-reflective sheet for printing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107843946A (en) * 2016-09-01 2018-03-27 3M创新有限公司 Netted reflecting material
US20200257024A1 (en) * 2019-02-11 2020-08-13 Fiberlok Technologies Light retroreflective graphic textile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107843946A (en) * 2016-09-01 2018-03-27 3M创新有限公司 Netted reflecting material
US20200257024A1 (en) * 2019-02-11 2020-08-13 Fiberlok Technologies Light retroreflective graphic textile

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