KR20040085247A - A reflection sheet - Google Patents

A reflection sheet Download PDF

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Publication number
KR20040085247A
KR20040085247A KR1020030019881A KR20030019881A KR20040085247A KR 20040085247 A KR20040085247 A KR 20040085247A KR 1020030019881 A KR1020030019881 A KR 1020030019881A KR 20030019881 A KR20030019881 A KR 20030019881A KR 20040085247 A KR20040085247 A KR 20040085247A
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South Korea
Prior art keywords
layer
sheet
reflection
reflective
adhesive layer
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KR1020030019881A
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Korean (ko)
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KR100591779B1 (en
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황건이
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황건이
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Priority to KR1020030019881A priority Critical patent/KR100591779B1/en
Publication of KR20040085247A publication Critical patent/KR20040085247A/en
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Publication of KR100591779B1 publication Critical patent/KR100591779B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/79—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures connecting to rigid printed circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/771—Details
    • H01R12/774—Retainers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/82—Coupling devices connected with low or zero insertion force
    • H01R12/85—Coupling devices connected with low or zero insertion force contact pressure producing means, contacts activated after insertion of printed circuits or like structures
    • H01R12/88—Coupling devices connected with low or zero insertion force contact pressure producing means, contacts activated after insertion of printed circuits or like structures acting manually by rotating or pivoting connector housing parts

Abstract

PURPOSE: A reflection sheet is provided, which allows a user to obtain a rainbow reflection from an artificial lighting as from a natural light. CONSTITUTION: A reflection sheet includes a carrier sheet, a viscosity layer, a glass bid(23), a transparent resin layer(24), a reflection layer(25) and an adhesive layer(26). The carrier sheet is made of a plastic material having a heat-resistance and a plasticity. The viscosity layer is coated on the carrier sheet, and has a melting point lower than that of the carrier sheet. The glass bid(23) is formed on the viscosity layer to perform the function of a lens. The transparent resin layer(24) is formed on the glass bid(23). The reflection which has the reflection surface on the glass bid(23) is coated on the transparent resin layer(24). The reflection layer(25) deposited on the transparent layer(24) forms the surface of a mirror, and the adhesive layer(26) adheres the work sheet to the top of the reflection layer(25).

Description

반사 시트{A REFLECTION SHEET}Reflective sheet {A REFLECTION SHEET}

본 발명은 반사 시트에 관한 것으로, 더 상세하게는 전조등과 같은 인위적인 조사광을 무지개로 반사되도록 한 반사 시트에 관한 것이다.TECHNICAL FIELD The present invention relates to a reflective sheet, and more particularly, to a reflective sheet in which artificial irradiation light such as a headlamp is reflected by a rainbow.

일반적으로 반사 시트는 도로의 안내 및 안전운행을 위한 표지판 또는 의류.신발이나 가방등의 신변용품에 부착하여 인위적인 조사 광선을 조사 방향으로 반사시키는 것으로, 특히 야간에 위치 식별 및 표식을 용이하게 확인할 수 있어 현재까지 여러가지로 개발되어 사용되고 있다.In general, the reflective sheet is attached to signs for the guidance of roads and safe driving, or to personal items such as clothing, shoes, or bags, and reflects artificial irradiation rays in the direction of irradiation. In particular, at night, location identification and marking can be easily confirmed. There are various development and use until now.

이와 같이 사용되는 반사 시트는 대체적으로 인위적인 광선의 조사시 단일색인 은백색으로만 반사되는 즉 휘도성에만 중점을 두고 개발되어 사용되고 있다. 그 일례로 도로 안내표지판의 경우를 보면, 도 1 에 도시한 바와같이, 합성수지물질의 캐리어 시트(11)상에 이 캐리어 시트(11)보다 낮은 융점을 갖는 합성수지물질의 점착층(12)과; 상기 점착층(12)위에 도포된 미세한 구슬 형상의 알갱이로 이루어져 렌즈기능을 하는 글래스 비드층(13)과; 상기 글래스 비드층(13)의 표면에 거울 반사면을 형성하는 반사층(14)과; 이 반사층(14)위에는 작업시트에 접착시키기 위한 접착층(15)과 보호층(16)을 차례로 포함하여 형성하게 된다.Reflective sheet used as described above has been developed and used with an emphasis on luminance only, that is, only a single color of silver white is reflected when irradiating artificial rays. As an example, in the case of the road guide sign, as shown in Fig. 1, the adhesive layer 12 of the synthetic resin material having a melting point lower than that of the carrier sheet 11 on the carrier sheet 11 of the synthetic resin material; A glass bead layer 13 composed of fine bead-shaped granules coated on the adhesive layer 12 to function as a lens; A reflection layer (14) for forming a mirror reflection surface on the surface of the glass bead layer (13); The reflective layer 14 is formed by including an adhesive layer 15 and a protective layer 16 in order to adhere to the work sheet.

이와 같이 형성된 반사시트는 표지판의 바탕색은 녹색으로 하고 안내문자 또는 도형들은 바탕색과는 차별되는 백색으로 인쇄하여 자연광(주간)에 2 컬러로 식별되게 하고, 야간에는 인위적인 광선 조사시 표지판의 바탕색(녹색)이 조사 광선에 흡수되어 식별되지 않고, 문자/도형 부분만이 단일 은백색으로 반사되도록 함으로써 제품의 다양화는 물론 상품의 고급화가 이루어지지 않고 있는 실정 있다.The reflective sheet formed in this way is printed with the background color of the sign in green and guide letters or figures printed in white to distinguish it from the background color, so that it is distinguished by two colors in the natural light (day), and the background color of the sign (green at night) ) Is not absorbed and irradiated by the irradiation light, and only the character / figure portion is reflected by a single silvery white color, thereby diversifying the product and improving the product.

그래서 최근에는 다양한 색상을 반사시킬 수 있게 상기 반사 시트를 형성하는 글래스 비드층과 반사층 사이에 다양한 색상으로 채색된 색상인쇄층을 형성하여 반사층을 통해서 반사된 광이 이 색상인쇄층을 통해 다색 반사가 이루어질수 있도록 하고 있으나, 이러한 형태의 다색 반사시트는 색상 인쇄층의 채색된 상태에 따른 색상만을 반사시키는 것에 불과하여 제품에 다양성은 물론, 상품의 고급화가 용이하지 않는 문제점을 가지게 되었다.Recently, a color printing layer colored in various colors is formed between the glass bead layer forming the reflective sheet and the reflective layer to reflect various colors, and the light reflected through the reflective layer is reflected by the multicolor reflective layer. However, this type of multicolored reflective sheet has only a reflection of the color according to the colored state of the color printing layer, and thus has a problem in that the product is not easily diversified and the quality of the product is not easy.

본 발명의 목적은 글래스 비드 상에 조사되는 광을 굴절하는 투명수지층을 형성하여 글래스 비드를 통과한 광이 투명수지층에서 굴절, 반사, 굴절되면서 무지개 반사되도록 함으로써, 화려한 장식성 효과를 꾀할 수 있는 반사 시트를 제공하고자 하는데 있다.An object of the present invention is to form a transparent resin layer that refracts the light irradiated on the glass bead so that the light passing through the glass bead is reflected by the refraction, reflection, refraction in the transparent resin layer, a brilliant decorative effect can be achieved It is to provide a reflective sheet.

상기의 목적을 실현하기 위한 본 발명은 내열성과 가소성을 갖는 합성수지물질의 캐리어 시트와; 상기 캐리어 시트상에 도포되며 이 캐리어 시트 보다 낮은 융점을 갖는 합성수지물질의 점착층과; 상기 점착층 위에 도포된 미세한 구슬 형상의 알갱이로 이루어져 렌즈기능을 하는 글래스 비드와; 상기 글래스 비드상에 굴절면을 갖는 투명성물질인 투명수지층과; 상기 투명수지층에 도포되어 거울반사면을 형성하는 반사층; 및 상기 투과성 물질인 반사층위에 작업시트에 접착시키기 위한 접착층을 포함하여서 된 것을 특징으로 한다.The present invention for realizing the above object is a carrier sheet of a synthetic resin material having heat resistance and plasticity; An adhesive layer of a synthetic resin material applied on the carrier sheet and having a lower melting point than the carrier sheet; A glass bead having a lens function consisting of fine bead-shaped granules coated on the adhesive layer; A transparent resin layer which is a transparent material having a refractive surface on the glass beads; A reflective layer formed on the transparent resin layer to form a mirror reflection surface; And an adhesive layer for adhering to the work sheet on the reflective layer which is the transparent material.

그러므로 본 발명에 의하면, 글래스 비드에 조사된 광은 글래스 비드를 통해서 굴절되면서 진행하다가 투명수지층에 형성된 균열에 의하여 일부의 광은 직진 또는 굴절, 반사, 굴절되고, 일부는 반사층에서 반사되어 나옴으로써, 무지개 반사가 나타나게 되어 보다 화려한 장식적 효과를 얻을 수 있게 되는 것이다.Therefore, according to the present invention, the light irradiated onto the glass bead proceeds while refracting through the glass bead, and some of the light is straight or refracted, reflected, or refracted by a crack formed in the transparent resin layer, and some is reflected by the reflective layer. The rainbow reflections will appear, giving a more decorative effect.

도 1 은 종래 반사시트의 일부 절결 평면도,1 is a partially cut-away plan view of a conventional reflective sheet,

도 2 는 본 발명에 따른 반사 시트의 일부 절결 단면도,2 is a partially cutaway sectional view of a reflective sheet according to the present invention;

도 3 은 본 발명에 따른 반사시트의 투명수지층 평면도,3 is a plan view of a transparent resin layer of a reflective sheet according to the present invention;

도 4 는 본 발명에 따른 반사 시트의 동작 상태도.4 is an operational state diagram of a reflective sheet according to the present invention;

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

20; 반사 시트 21; 캐리어 시트20; Reflective sheet 21; Carrier sheet

22; 점착층 23; 글래스 비드22; Adhesive layer 23; Glass beads

24; 투명수지층 25; 반사층24; Transparent resin layer 25; Reflective layer

26; 접착층 27; 보호층26; Adhesive layer 27; Protective layer

이하 첨부되는 도면에 의거 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 반사 시트의 일부 절결 단면도 이고, 도 3 은 본 발명에 따른 반사시트의 투명수지층 평면도 이며, 도 4 는 본 발명에 따른 반사 시트의 동작상태도 로서, 반사 시트(20)는 캐리어 시트(21)를 포함하며 상기 캐리어 시트(21)상에는 점착층(22)이 형성되고. 이 점착층(22)의 표면에는 글래스 비드(23)가 적층 형성되며, 이 글래스 비드(23)상에는 투명수지층(24)과 반사층(25), 그리고 접착층(26)을 순차적으로 적층 형성되고, 상기 접착층(26)상에는 보호층(27)을 적층하게 된다.2 is a partially cut-away cross-sectional view of the reflective sheet according to the present invention, FIG. 3 is a plan view of the transparent resin layer of the reflective sheet according to the present invention, and FIG. 4 is an operational state diagram of the reflective sheet according to the present invention. ) Includes a carrier sheet 21, and an adhesive layer 22 is formed on the carrier sheet 21. Glass beads 23 are laminated on the surface of the adhesive layer 22, and the transparent resin layer 24, the reflective layer 25, and the adhesive layer 26 are sequentially formed on the glass beads 23. The protective layer 27 is laminated on the adhesive layer 26.

상기 캐리어 시트(21)는 폴리에스테르 필름(polyester film) 또는 합성수지 테이프를 사용하게 된다.The carrier sheet 21 uses a polyester film or a synthetic tape.

상기 점착층(22)은 캐리어 시트(21)의 상면에 도포되며, 이 점착층(22)은 글래스 비드(23)를 캐리어 시트(21)상에 안정적으로 유지시켜주는 우레탄 수지, 에폭시 수지, 및 아크릴수지와 같은 접착력이 양호한 접합제로 형성하게 되고, 상기 열전사 공정 완료후에는 글래스 비드층(23)으로 부터 캐리어 시트(21)와 함께 분리된다.The adhesive layer 22 is applied to the upper surface of the carrier sheet 21, the adhesive layer 22 is urethane resin, epoxy resin, and stably maintaining the glass beads 23 on the carrier sheet 21, and Adhesion such as acrylic resin is formed to a good bonding agent, and after completion of the thermal transfer process is separated from the glass bead layer 23 together with the carrier sheet 21.

상기 글래스 비드(23)는 전면에 롤러(roller)와 같은 적절한 적층 공정에 의해 적층되고, 상기 글래스 비드(23)는 2.20 내지 2.30의 굴절률을 갖는 직경이 50 - 120㎛의 알갱이로 하여, 상기 점착층(22)에 20-30 퍼센트 정도 깊이로 매립 형성하게 된다.The glass beads 23 are laminated on the front side by a suitable lamination process such as a roller, and the glass beads 23 are granules having a diameter of 50 to 120 μm having a refractive index of 2.20 to 2.30, and the adhesion The layer 22 is buried 20-20 percent deep.

상기 투명수지층(24)은 투과성을 갖는 중합체인 폴리비닐 부틸수지, 우레탄수지, 에폭시 수지와 같은 물질로 형성하며, 여기서 투명수지층(24)은 통상의 스크린 인쇄 또는 그라비아 인쇄 방식의 공정을 통해서 도포하되, 상기 투명수지층(24)의 두께는 5 - 20㎛ 범위로 도포하게 된다.The transparent resin layer 24 is formed of a material such as a polyvinyl butyl resin, a urethane resin, an epoxy resin having a permeable polymer, and the transparent resin layer 24 is formed through a conventional screen printing or gravure printing process. To apply, but the thickness of the transparent resin layer 24 is to be applied in the range of 5-20㎛.

상기 반사층(25)은 투명수지층(24)상에 진공증착(vacuum vapor deposition)법에 의해 황화아연(ZnS)을 약 0.01 - 0.1㎛ 정도로 도포하게 된다.The reflective layer 25 is coated with zinc sulfide (ZnS) on the transparent resin layer 24 by about 0.01 to 0.1㎛ by vacuum vapor deposition.

따라서 상기 반사층(25)의 진공증착법에 의하여 상기 투명수지층(24)은 고온가열(1200℃) 및 급속냉각(-25℃)에 의한 열변형에 의해서 균열이 발생되어 상기 투명수지층(24)에 균열에 의한 굴절면을 형성하여 프리즘의 역할을 하게 되고, 상기 투명수지층(24)에 도포된 반사층(25)은 거울 반사면으로 역할을 하게 되며, 한편 글래스 비드(23)는 오목렌즈 역할을 하게 되므로 빛이 입사되었을 때 굴절 반사 굴절에 의한 무지개 광을 반사하게 된다.Therefore, the transparent resin layer 24 is cracked due to thermal deformation by high temperature heating (1200 ° C.) and rapid cooling (-25 ° C.) by vacuum deposition of the reflective layer 25. It forms a refractive surface by cracks to act as a prism, and the reflective layer 25 applied to the transparent resin layer 24 serves as a mirror reflective surface, while the glass bead 23 serves as a concave lens. Therefore, when the light is incident to reflect the rainbow light due to refraction reflection refraction.

상기 접착층(26)은 반사층(25)상에 약 50 - 12㎛ 두께를 갖도록 도포된다. 상기 접착층(26)을 이루는 접착제로는 열가소성(핫멜트)와 같이 다양한 종류가 사용될 수 있다.The adhesive layer 26 is applied on the reflective layer 25 to have a thickness of about 50-12 μm. As the adhesive for forming the adhesive layer 26, various kinds of adhesives, such as thermoplastic (hot melt), may be used.

그리고 접착층(26)상에는 보호층(27)이 제공된다. 이러한 보호층(27)은 운반 및 보관시 접착층(26)이 이물질로 오염되는 것을 예방하게 된다.A protective layer 27 is provided on the adhesive layer 26. The protective layer 27 prevents the adhesive layer 26 from being contaminated with foreign matter during transportation and storage.

이와 같이 구성되는 반사 시트를 사용하고자 할 경우, 먼저 보호층(27)을 벗겨낸 상태에서 작업시트상에 열가소성(핫멜트)접착층(26)을 대고 폴리에스테르 필름인 캐리어 시트(21)를 열전사하게 되면, 이 열전사에 의하여 접착층(26)은 용융되면서 작업시트에 접착되게 되고, 이때 상기 캐리어 시트(21)는 점착층(22)보다 높은 융점을 가지고 있으며, 또한 캐리어 시트(21)와 점착층(22)의 이중 구조로 인해 상기 열전사 할때 가해지는 열이 캐리어 시트(21)와 점착층(22)에 분산된다.In the case of using the reflective sheet configured as described above, the thermoplastic sheet (hot melt) adhesive layer 26 is placed on the work sheet in a state where the protective layer 27 is first peeled off, and the carrier sheet 21 which is a polyester film is thermally transferred. In this case, the adhesive layer 26 is melted and adhered to the work sheet by the thermal transfer, wherein the carrier sheet 21 has a higher melting point than the adhesive layer 22, and also the carrier sheet 21 and the adhesive layer. Due to the double structure of (22), the heat applied during the thermal transfer is dispersed in the carrier sheet 21 and the adhesive layer 22.

즉, 캐리어 시트(21)에 직접적으로 전달된 열은 상기 캐리어 시트(21)에 어느 정도 흡수된 다음 점착층(22)에 전달이 되므로 점착층(22)은 녹지 않은 상태에서 유연해지게 되어 상기 글래스 비드(23)로 부터 깨끗하게 분리된다. 이때 점착층(22)은 녹아서 들러붙지 않게 되므로 글래스 비드(23)를 안정적으로 유지시켜 준 상태에서 작업시트에 반사시트의 부착이 완료되게 된다.That is, since the heat transferred directly to the carrier sheet 21 is absorbed to some extent in the carrier sheet 21 and then transferred to the adhesive layer 22, the adhesive layer 22 becomes flexible in an unmelted state. It is cleanly separated from the glass beads 23. At this time, since the adhesive layer 22 is not melted and adhered, the adhesion of the reflective sheet to the work sheet is completed while maintaining the glass beads 23 stably.

이와 같이 반사시트를 접착한 상태에서 상기 반사시트의 반사하는 과정을 설명하면, 인위적인 광선(자동차의 전조등)이 조사될때, 이 조사된 광선은 글래스 비드(23)내로 굴절하면서 진행하다가 투명수지층(24)에 형성된 균열에 의한 굴절면에 의해서 프리즘 작용을 하게 되어 상기 굴절된 광의 일부는 상기 균열에 의한 굴절면에서 굴절, 반사가 반복되면서 나오거나 또는 일부는 반사층(25)에서 반사되어 입사되는 방향으로 재반사가 되면서 글래스 비드(23)의 경계면에서 굴절되어 분산되어 나오게 됨으로써, 마치 대기중에 수많은 물방울에 의한 굴절, 반사, 굴절현상으로 인하여 발생되는 무지개 반사가 이루어지게 되는 것이다.As described above, the process of reflecting the reflective sheet in the state in which the reflective sheet is adhered is described. When an artificial light ray (headlight of an automobile) is irradiated, the irradiated light ray is refracted into the glass bead 23, and then the transparent resin layer The prism acts by the refractive surface formed by the crack formed in 24), so that a part of the refracted light is repeatedly generated by refraction and reflection on the refractive surface caused by the crack, or a part of the refracted light is reflected by the reflective layer 25 to be incident again As it is reflected, the glass beads 23 are refracted and dispersed at the boundary surface, so that the rainbow reflection is generated due to refraction, reflection, or refraction caused by numerous droplets in the atmosphere.

본 발명에 의하면 인위적인 조사 광선에서 자연광에서와 같은 무지개 반사를 얻을 수 있으므로 제품성은 물론이고 상품의 고급화가 가능한 것이다.According to the present invention, since the rainbow reflection as in natural light can be obtained from artificial irradiated light, it is possible to upgrade the product as well as the product quality.

Claims (3)

내열성과 가소성을 갖는 합성수지물질의 캐리어 시트와; 상기 캐리어 시트상에 도포되며 이 캐리어 시트 보다 낮은 융점을 갖는 합성수지물질의 점착층과; 상기 점착층 위에 도포된 미세한 구슬 형상의 알갱이로 이루어져 렌즈기능을 하는 글래스 비드와; 상기 글래스 비드상에 굴절면을 갖는 투명성물질인 투명수지층과; 상기 투명수지층에 도포되어 거울반사면을 형성하는 반사층; 및 상기 투과성 물질인 반사층위에 작업시트에 접착시키기 위한 접착층을 포함하여서 된 것을 특징으로하는 반사 시트.A carrier sheet of synthetic resin material having heat resistance and plasticity; An adhesive layer of a synthetic resin material applied on the carrier sheet and having a lower melting point than the carrier sheet; A glass bead having a lens function consisting of fine bead-shaped granules coated on the adhesive layer; A transparent resin layer which is a transparent material having a refractive surface on the glass beads; A reflective layer formed on the transparent resin layer to form a mirror reflection surface; And an adhesive layer for adhering to the work sheet on the reflective layer which is the transparent material. 제 1 항에 있어서, 상기 투명수지층은 투명성이 양호한 중합체인 폴리비닐 부틸 수지, 우레탄수지, 에폭시수지중 어느 하나의 재질로 하여서 된 것을 특징으로 하는 반사 시트.The reflective sheet according to claim 1, wherein the transparent resin layer is made of any one of polyvinyl butyl resin, urethane resin, and epoxy resin which is a polymer having good transparency. 제 1 항에 있어서, 상기 투명수지층은 진공증착에 의한 고온가열 및 급속냉각으로 열변형을 일으켜 균열면을 갖도록 형성하여서 된 것을 특징으로 하는 반사 시트.The reflective sheet according to claim 1, wherein the transparent resin layer is formed to have a cracked surface by causing heat deformation by high temperature heating and rapid cooling by vacuum deposition.
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KR100891901B1 (en) * 2007-04-03 2009-04-03 최상석 Cube-corner type Reflective material and the method for producing the same
KR101684012B1 (en) 2014-12-03 2016-12-07 현대자동차주식회사 A smart window using a glass bead and liquid crystal, and method for production thereof

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JPH0784109A (en) * 1993-09-14 1995-03-31 Yamaha Motor Co Ltd Sheet having light accumulating property and reflecting property
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KR200459750Y1 (en) * 2009-07-27 2012-04-13 정용탁 Transfer paper with beads transfer effect

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