JPH0380101B2 - - Google Patents
Info
- Publication number
- JPH0380101B2 JPH0380101B2 JP57095722A JP9572282A JPH0380101B2 JP H0380101 B2 JPH0380101 B2 JP H0380101B2 JP 57095722 A JP57095722 A JP 57095722A JP 9572282 A JP9572282 A JP 9572282A JP H0380101 B2 JPH0380101 B2 JP H0380101B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- retroreflective sheet
- transmitting
- partially
- resin layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 39
- 239000011347 resin Substances 0.000 claims description 32
- 229920005989 resin Polymers 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000004049 embossing Methods 0.000 claims description 13
- 239000004005 microsphere Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 49
- 238000000034 method Methods 0.000 description 7
- 238000005286 illumination Methods 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000003981 vehicle Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は内部照明式表示板用の再帰性反射シー
ト状物およびその製造方法に関するものであり、
特に内部照明の消燈時においても表示板の前方か
ら照射される光を再帰反射し、表示板面上の標識
を視認することができる、新規な部分光透過性再
帰性反射シート状物およびその製造方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a retroreflective sheet material for internally illuminated display boards and a method for manufacturing the same.
In particular, a novel partially transparent retroreflective sheet material that retroreflects the light emitted from the front of the display board and makes it possible to visually recognize the sign on the display board even when the internal lighting is turned off. This relates to a manufacturing method.
道路上に設置される道路標識の一つに、標識表
示板本体の内部に光源を配置し、夜間この光源を
点燈させることにより前面の標識表示板を明示す
る内部照明式表示板が採用されている。この内部
から照明される表示板の主たる利点は、近接する
車のヘツドライトの到達範囲外にあつても夜間に
標識を視認することができることである。しか
し、この内部照明式表示板は停電あるいは内部光
源が故障を起すと重大な欠点をもたらす。すなわ
ち夜間において光源が点燈しない場合には、高速
で走つている車の運転車は標識を判断できないの
である。そこでこのような内部照明式表示板に再
帰反射性を付与することが考えられ、数種の方法
が採用されている。たとえば、特開昭48−82163
号に記載されているように、微細な再反射性微小
球体によつて被包された繊条の開口織布からなる
再帰性反射シートを使用した表示板、あるいは実
開昭52−126789号に記載されているように、透明
微少球体と半透過性の反射層からなる再帰性反射
シートを使用した表示板等が提案されている。し
かるに特開昭48−82163号に記載のような再帰性
反射シートは、該シート自体の製造方法が煩雑で
製造コストが高くかかるばかりか、内部照明式の
表示板に製造する場合も再反射性微小球体が繊条
上に露出して被包しているため、表示板外部表面
には直接使用できず、必ず該シートの前面に透明
板を設ける必要があり、製造工程が増し製造コス
トが高くなる欠点を有する。また実開昭52−
126789号に記載のような半透過性の反射層を使用
した場合は、該半透過性反射層の再帰性反射特性
が悪く、実際の使用にあたつては性能上の問題点
がある。 One of the road signs installed on roads is an internally illuminated display board, which has a light source placed inside the main body of the sign display board and lights up the light source at night to clearly identify the front sign display board. ing. The main advantage of this internally illuminated sign is that it allows the sign to be seen at night even when it is out of range of the headlights of nearby vehicles. However, this internally illuminated display board presents significant drawbacks in the event of a power outage or failure of the internal light source. In other words, if the light source is not turned on at night, a car driving at high speed cannot recognize the sign. Therefore, it has been considered to impart retroreflectivity to such internally illuminated display boards, and several methods have been adopted. For example, JP-A-48-82163
As described in the Japanese Utility Model Application Publication No. 126789/1989, a display board using a retroreflective sheet made of an open woven fabric of fibers encapsulated by fine retroreflective microspheres; As described above, display boards and the like using retroreflective sheets made of transparent microspheres and a semi-transparent reflective layer have been proposed. However, the retroreflective sheet described in JP-A No. 48-82163 not only requires a complicated manufacturing method and is expensive to manufacture, but also has poor retroreflectivity when manufactured into an internally illuminated display board. Because the microspheres are exposed and encapsulated on the filaments, they cannot be used directly on the external surface of the display panel, and a transparent plate must be provided in front of the sheet, which increases the manufacturing process and increases the manufacturing cost. It has some drawbacks. Also, in 1977-
When a semi-transparent reflective layer as described in No. 126789 is used, the retroreflective properties of the semi-transparent reflective layer are poor and there are performance problems in actual use.
本発明は上記のごとき欠点を解消し、安価にし
てかつ再帰性反射特性の優れた内部照明式表示板
用の部分光透過性再帰性反射シート状物およびそ
の新規な製造方法を提供するものである。なおこ
こでいう再帰性反射とは、入射光の大部分がその
入射方向と同方向の狭い範囲に反射し、入射角に
対して変化の少ない反射角を有する光の反射を指
す。 The present invention solves the above-mentioned drawbacks and provides a partially light-transmitting retroreflective sheet material for internally illuminated display boards that is inexpensive and has excellent retroreflection properties, and a novel method for manufacturing the same. be. Note that the term "retroreflection" as used herein refers to the reflection of light in which most of the incident light is reflected in a narrow range in the same direction as the incident direction, and the reflection angle has little change with respect to the incident angle.
すなわち本発明は、一定の光学的関係を維持し
た、主として透明性表面樹脂層、透明微小球子、
焦点樹脂層および光反射層からなる再帰性反射シ
ート状物において、該再帰性反射シート状物の光
反射層にその専有面積が10〜80％の光透過部を有
することを特徴とする部分光透過性再帰性反射シ
ート状物、および一定の光学的関係を維持した、
主として透明性表面樹脂層、透明微小球子、焦点
樹脂層および光反射層からなる再帰性反射シート
状物を、所定の模様が突出した面を有する充分に
加熱されたエンボスロールと対向ロールとの間
で、該シート状物の光反射層側をエンボスロール
面に向けて挾圧しつつ送行させ、光反射層に部分
的に光透過部を設けることを特徴とする部分光透
過性再帰性反射シート状物の製造方法である。 That is, the present invention mainly consists of a transparent surface resin layer, transparent microspheres, and
A retroreflective sheet-like article comprising a focusing resin layer and a light-reflecting layer, wherein the light-reflecting layer of the retroreflective sheet-like article has a light transmitting portion having an exclusive area of 10 to 80%. a transparent retroreflective sheeting and maintaining a constant optical relationship;
A retroreflective sheet-like material mainly consisting of a transparent surface resin layer, transparent microspheres, a focusing resin layer, and a light reflective layer is rolled between a sufficiently heated embossing roll having a surface with a predetermined pattern protruding thereon and an opposing roll. A partially light-transmitting retroreflective sheet, characterized in that the light-reflecting layer side of the sheet-like material is conveyed while being pinched and pressed toward the embossing roll surface, and the light-reflecting layer is partially provided with a light-transmitting part. This is a method for manufacturing a shaped article.
以下図面に基づいて本発明を説明する。第１図
は従来の再帰性反射シート状物の一実施形態の断
面を図示したもので、１は透明性表面樹脂層、２
は透明微小球子、３は多数の透明微小球子を一定
の光学的関係を維持しつつ単層に封入した焦点樹
脂層、４は光反射層で、これらから構成されるＡ
が一定の光学的関係を維持し、入射光を効率よく
入射光と同一方向へ反射するように構成された再
帰性反射シート状物である。 The present invention will be explained below based on the drawings. FIG. 1 shows a cross section of an embodiment of a conventional retroreflective sheet-like material, in which 1 is a transparent surface resin layer, 2 is a transparent surface resin layer;
A is composed of transparent microspheres, 3 is a focusing resin layer in which a large number of transparent microspheres are encapsulated in a single layer while maintaining a certain optical relationship, and 4 is a light reflecting layer.
This is a retroreflective sheet-like material configured to maintain a constant optical relationship and efficiently reflect incident light in the same direction as the incident light.
第２図は本発明の光を部分的に透過する内部照
明式表示板用の部分光透過性再帰性反射シート状
物Ｂの一実施形態を示す断面図である。１，２，
３，４はそれぞれ第１図と同様に、透明性表面樹
脂層、透明微小球子、焦点樹脂層および光反射層
であり、これらで再帰性反射部B1を構成してい
る。B2は本発明の特徴である光透過部であり、
該反射シート状物を貼付した表示板の内部からの
照明光を外部へ透過し得るように構成されてい
る。 FIG. 2 is a cross-sectional view showing an embodiment of a partially light-transmitting retroreflective sheet material B for an internally illuminated display board that partially transmits light according to the present invention. 1, 2,
3 and 4 are a transparent surface resin layer, transparent microspheres, a focusing resin layer, and a light reflection layer, respectively, as in FIG. 1, and these constitute the retroreflection section B1 . B 2 is a light transmitting part which is a feature of the present invention,
It is configured such that illumination light from inside the display board to which the reflective sheet-like material is attached can be transmitted to the outside.
第３図は本発明の部分光透過性反射シート状物
Ｂの一実施形態の平面図で、前記のごとく再帰性
反射部B1と光透過部B2とが設けられている。こ
の光透過部B2は１辺が30mmを越えない正六角形
の少なくとも幅が0.1mmの細線よりなり、光透過
部B2の面積は全面積の10〜80％を占め、そのう
ち特に20〜50％の範囲が内部からの照明光および
外部光からの反射光による標識の視認性の優れた
領域である。光透過部B2の面積が10％以下にな
ると光の透過量が少なく、内部からの照明光によ
る標識の視認性が劣り、内部照明式表示板として
の機能を果さなくなる。また、光透過部B2の面
積が80％以上になると、光の透過量が多くなり、
内部からの照明光による視認性は良好となるが、
前方から入射する光に対する再帰反射光の量が低
下し、消燈時の標識の視認性が劣り、再帰性反射
シート状物としての機能を果さなくなる。なお、
上記の正六角形の細線による光透過部のほか、３
角形以上の多角形、互に交差することのないある
いは交差する直線状あるいは曲線状の細線あるい
は略円形などの任意の形状の光透過部ももちろん
採用できる。 FIG. 3 is a plan view of an embodiment of the partially light-transmissive reflective sheet B of the present invention, in which the retroreflective portion B 1 and the light-transmissive portion B 2 are provided as described above. This light transmitting part B 2 is made of a regular hexagon with a side not exceeding 30 mm and a thin line with a width of at least 0.1 mm. % range is the area where the sign is highly visible due to internal illumination light and reflected light from external light. If the area of the light transmitting portion B2 is less than 10%, the amount of light transmitted will be small, the visibility of the sign with illumination light from inside will be poor, and the sign will no longer function as an internally illuminated display board. In addition, when the area of light transmitting part B 2 becomes 80% or more, the amount of light transmitted increases,
Visibility with illumination light from inside is good, but
The amount of retroreflected light relative to the light incident from the front decreases, the visibility of the sign when the lights are turned off becomes poor, and the sign no longer functions as a retroreflective sheet. In addition,
In addition to the light transmitting part made of regular hexagonal thin wires mentioned above, 3
Of course, any shape of the light transmitting portion can be used, such as a polygon larger than a rectangle, a linear or curved thin line that does not intersect or intersect with each other, or a substantially circular shape.
第４図は本発明の部分光透過性再帰性反射シー
ト状物Ｂを組み込んだ標識表示板Ｃの１例を示す
概略断面図であり、１面を開放した箱状のケース
１１、該ケース１１の開放面を覆い透明性表面樹
脂層上に標識像１２を有する本発明の部分光透過
性の再帰性反射シート状物Ｂ、該反射シート状物
Ｂを固着保持する透明板１３および箱状のケース
１１の内部に装着された１個ないし複数個の蛍光
燈あるいは白熱電燈などからなる光源１４で構成
されている。さらに標識像１２の前面に該標識像
１２および部分光透過性再帰性反射シート状物Ｂ
を保護するために透明性表面保護層１５を設ける
こともできる。夜間において該標識表示板Ｃの光
源１４が点燈されると、光源１４からの照明光は
透明板１３、部分光透過性再帰性反射シート状物
Ｂの光透過部および透明性表面保護層１５を透過
して外部に照射されるため、車輛の運転者は標識
像１２を明確に視認することができる。また光源
１４が断線あるいは停電等の事故により消燈した
場合は、車輛の前照燈から照射される光が透明性
表面保護層１５を経て、部分光透過性再帰性反射
シート状物Ｂの再帰性反射部に照射され、そこで
再帰反射されて入射光とほぼ同じ経路に沿つて戻
り、車輛の運転者はこの反射光により明示された
標識像１２を視認することができる。 FIG. 4 is a schematic cross-sectional view showing an example of a sign display board C incorporating the partially light-transmitting retroreflective sheet material B of the present invention, including a box-shaped case 11 with one side open; A partially light-transmissive retroreflective sheet-like material B of the present invention having a marker image 12 on a transparent surface resin layer covering the open surface of the material, a transparent plate 13 for firmly holding the reflective sheet-like material B, and a box-shaped The light source 14 is comprised of one or more fluorescent lights, incandescent lights, etc. mounted inside the case 11. Further, in front of the sign image 12, the sign image 12 and a partially light-transmitting retroreflective sheet-like material B are provided.
A transparent surface protection layer 15 may also be provided to protect the surface of the substrate. When the light source 14 of the sign display board C is turned on at night, the illumination light from the light source 14 illuminates the transparent plate 13, the light transmitting portion of the partially light transmitting retroreflective sheet material B, and the transparent surface protection layer 15. Since the sign image 12 is transmitted through and irradiated to the outside, the driver of the vehicle can clearly see the sign image 12. In addition, when the light source 14 is turned off due to an accident such as a disconnection or a power outage, the light emitted from the vehicle headlight passes through the transparent surface protection layer 15 and is reflected back onto the partially light-transmissive retroreflective sheet material B. The light is irradiated onto a reflective part, where it is retroreflected and returns along substantially the same path as the incident light, and the driver of the vehicle can visually recognize the sign image 12 clearly defined by this reflected light.
次に本発明の内部照明式表示板用の部分光透過
性再帰性反射シート状物の製造方法を図面に基づ
いて説明する。第５図は本発明の実施例を示す、
ローラの回転軸に平行な面で切断した断面模式図
である。Ａは第１図で説明した再帰性反射シート
状物で、透明性表面樹脂層１、透明微小球子２、
焦点樹脂層３および光反射層４から構成されてい
る。５は該再帰性反射シート状物Ａの支持材でポ
リエステルフイルムから成つており、一般には再
帰性反射シート状物の製造時の支持材として使用
されており、該反射シート状物の製品化時に剥離
除去されるものである。２１は所定の模様が突出
した面２１′を有するエンボスロール、２２はエ
ンボスロール、に対向し、エンボスロール２１と
協働して該再帰性反射シート状物Ａを挾圧する対
向ロールである。 Next, a method for manufacturing a partially light-transmitting retroreflective sheet for an internally illuminated display board according to the present invention will be described with reference to the drawings. FIG. 5 shows an embodiment of the invention,
FIG. 3 is a schematic cross-sectional view taken along a plane parallel to the rotation axis of the roller. A is the retroreflective sheet-like material explained in FIG. 1, which includes a transparent surface resin layer 1, transparent microspheres 2,
It is composed of a focusing resin layer 3 and a light reflecting layer 4. Reference numeral 5 denotes a support material for the retroreflective sheet A, which is made of polyester film and is generally used as a support material when producing a retroreflective sheet. It is peeled off and removed. 21 is an embossing roll having a surface 21' on which a predetermined pattern is projected; 22 is an opposing roll that faces the embossing roll and cooperates with the embossing roll 21 to clamp and press the retroreflective sheet material A.
支持材５で支持された再帰性反射シート状物Ａ
を、該シート状物Ａの透明性表面樹脂層１およ
び／あるいは焦点樹脂層３が軟化流動可能な温度
に加熱されたエンボスロール２１と加熱された又
は加熱されない対向ロール２２との間で、該反射
シート状物Ａの光反射層側をエンボスローラー側
に向けて、所定圧力で挾圧することにより、エン
ボスロール２１の突出部に押しつけられた光反射
層４はその部分の焦点樹脂層および／あるいは透
明性表面樹脂層の流動により破壊されて拡散し、
光透過性を有する部分を形成するのである。 Retroreflective sheet material A supported by support material 5
The transparent surface resin layer 1 and/or focal resin layer 3 of the sheet-like material A are heated between an embossing roll 21 heated to a temperature at which the transparent surface resin layer 1 and/or focal resin layer 3 can soften and flow, and a heated or unheated opposing roll 22. By sandwiching the reflective sheet-like material A with the light reflective layer side facing the embossing roller side at a predetermined pressure, the light reflective layer 4 pressed against the protruding part of the embossing roll 21 is exposed to the focal resin layer and/or the focal resin layer of that part. It is destroyed and diffused by the flow of the transparent surface resin layer,
This forms a light-transmissive portion.
以上のように本発明の方法は内部照明式表示板
用の部分光透過性再帰性反射シート状物を製造す
るにあたつて、従来技術のような煩雑な製造工程
をとらず、通常の方法で製造されている再帰性反
射シート状物を使用し、簡便に低コストでかつ性
能の優れた製品を製造する新規な製造方法を提供
するものである。 As described above, the method of the present invention does not require the complicated manufacturing process of the prior art in manufacturing a partially light-transmitting retroreflective sheet-like material for an internally illuminated display board, but instead uses a normal method. The present invention provides a new manufacturing method for easily manufacturing products with excellent performance at low cost by using a retroreflective sheet-like material manufactured by.
次に実施例により本発明をさらに説明する。 Next, the present invention will be further explained by examples.
実施例
厚さ50ミクロンのポリエステルフイルム上に熱
硬化型アクリル樹脂からなる透明性表面樹脂層を
設け、その表面樹脂層に平均直径50ミクロンの透
明高屈折率ガラスビーズを単層に半ば埋没させた
のち、一定の光学的関係を維持するように熱硬化
型アクリル樹脂からなる焦点樹脂層を該ガラスビ
ーズ上に形成し、その上から約400Åの厚さにア
ルミニウムを真空蒸着して光反射層を設けること
により再帰性反射シート状物を作製する。Example A transparent surface resin layer made of thermosetting acrylic resin was provided on a polyester film with a thickness of 50 microns, and transparent high refractive index glass beads with an average diameter of 50 microns were half-embedded in the single layer in the surface resin layer. Afterwards, a focusing resin layer made of thermosetting acrylic resin is formed on the glass beads to maintain a certain optical relationship, and a light reflecting layer is formed by vacuum evaporating aluminum to a thickness of about 400 Å on top of the focusing resin layer. By providing this, a retroreflective sheet-like material is produced.
この再帰性反射シート状物を、１辺が1.8mmで
太さ0.3mmの正６角形格子模様の突状部を表面に
有し160℃に加熱したエンボスロールと水冷式の
対向ロールとの間で、アルミニウム蒸着層からな
る光反射層側を加熱エンボスロール側に向けて20
Kg／cm2の圧力で挾圧送行させ、光反射層に光透過
部を設ける。このようにして光透過部の幅が0.4
mmで、光透過部の専有面積比率が25％の部分光透
過性再帰性反射シート状物が得られた。 This retroreflective sheet material is placed between an embossing roll heated to 160°C and a water-cooled opposing roll, which has protrusions in a regular hexagonal lattice pattern on the surface with a side of 1.8 mm and a thickness of 0.3 mm. 20 minutes with the light-reflecting layer side consisting of the aluminum vapor-deposited layer facing the heating embossing roll side.
It is fed under pressure of Kg/cm 2 and a light transmitting part is provided on the light reflecting layer. In this way, the width of the light transmitting part is 0.4
mm, a partially light-transmissive retroreflective sheet-like material with an exclusive area ratio of the light-transmitting portion of 25% was obtained.
さらに、同様にエンボスロールの加熱温度およ
び挾圧を変えることにより、あるいは透明性表面
樹脂層および／あるいは焦点樹脂層の樹脂を熱流
動温度の異なる熱硬化型ウレタン樹脂に変えるこ
とにより、光反射層の光透過部の専有面積の異な
る部分光透過性再帰性反射シート状物を得た。 Furthermore, by similarly changing the heating temperature and clamping pressure of the embossing roll, or by changing the resin of the transparent surface resin layer and/or focal resin layer to a thermosetting urethane resin with a different heat flow temperature, a light reflecting layer can be formed. A partially light-transmissive retroreflective sheet material having different exclusive areas of light-transmitting parts was obtained.
これらの反射シート状物について光透過性能お
よび再帰性反射性能の測定を行つた。光透過性能
は第４図に示すような標識表示板内の光源に40ワ
ツトの蛍光燈電球を使用し、その前面に部分光透
過性再帰性反射シート状物をとりつけた状態で標
識板の表示面の照度を照度計で測定することによ
り行つた。再帰性反射性能は、同様に部分光透過
性再帰性反射シート状物をとりつけた状態で内部
光源を消燈し、JIS Ｚ−9117に記載される反射シ
ートの反射性能試験に準じ、観測角0.2度、入射
角−４度で反射輝度を測定し、光透過部の専有面
積比率０％のさいの反射輝度を100とした場合の
比率で表わす。 The light transmission performance and retroreflection performance of these reflective sheet materials were measured. The light transmission performance is determined by using a 40 watt fluorescent light bulb as the light source inside the sign board, as shown in Figure 4, and by attaching a partially light-transmitting retroreflective sheet-like material to the front of the sign board. This was done by measuring the illuminance of the surface using a luminometer. Retroreflection performance was determined by turning off the internal light source with the partially transparent retroreflection sheet attached, and observing at an observation angle of 0.2 according to the reflection performance test for reflection sheets described in JIS Z-9117. The reflected brightness is measured at an incident angle of -4 degrees, and is expressed as a ratio when the reflected brightness when the occupied area ratio of the light transmitting part is 0% is 100.
これらの部分光透過性再帰性反射シート状物の
光透過性能および再帰性反射性能を光透過部の専
有面積比率に対して表わすと第６図のとうりであ
つた。 The light transmittance performance and retroreflection performance of these partially light transmitting retroreflective sheet materials are shown in FIG. 6 when expressed with respect to the exclusive area ratio of the light transmitting portion.
第１図は従来の再帰性反射シート状物の一実施
形態の断面図、第２図および第３図は本発明の部
分光透過性再帰性反射シート状物の一実施形態の
断面図および平面図、第４図は本発明の部分光透
過性再帰性反射シート状物を組み込んだ内部照明
式標識表示板の概略断面図である。第５図は本発
明の部分光透過性再帰性反射シート状物の製造状
態を示す断面模式図である。第６図は本発明の部
分光透過性再帰性反射シート状物の光透過部の専
有面積と光透過性能および再帰性反射性能との関
係を表わすグラフである。
Ａ……従来の再帰性反射シート状物、Ｂ……本
発明の部分光透過性再帰性反射シート状物、Ｃ…
…標識表示板、１……透明性表面樹脂層、２……
透明微小球子、３……焦点樹脂層、４……光反射
層、５……支持材、１１……箱状ケース、１２…
…標識像、１３……透明板、１４……光源、２１
……エンボスロール、２２……対向ロール。
FIG. 1 is a sectional view of an embodiment of a conventional retroreflective sheet, and FIGS. 2 and 3 are a sectional view and a plan view of an embodiment of a partially light-transmitting retroreflective sheet of the present invention. FIG. 4 is a schematic cross-sectional view of an internally illuminated sign display board incorporating the partially light-transmitting retroreflective sheet-like material of the present invention. FIG. 5 is a schematic cross-sectional view showing the manufacturing state of the partially light-transmitting retroreflective sheet-like article of the present invention. FIG. 6 is a graph showing the relationship between the exclusive area of the light transmitting portion of the partially light transmitting retroreflective sheet of the present invention, the light transmittance performance, and the retroreflection performance. A... Conventional retroreflective sheet material, B... Partially transparent retroreflective sheet material of the present invention, C...
... Sign display board, 1 ... Transparent surface resin layer, 2 ...
Transparent microspheres, 3... Focusing resin layer, 4... Light reflecting layer, 5... Supporting material, 11... Box-shaped case, 12...
... Sign image, 13 ... Transparent plate, 14 ... Light source, 21
... Emboss roll, 22 ... Opposing roll.
Claims (1)
性表面樹脂層、透明微小球子、焦点樹脂層および
光反射層からなる再帰性反射シート状物におい
て、該再帰性反射シート状物の光反射層にその専
有面積が10〜80％の光透過部を有することを特徴
とする部分光透過性再帰性反射シート状物。 ２ 光透過部が少なくとも0.1mmの線幅を有する
細線からなる特許請求の範囲第１項記載の部分光
透過性再帰性反射シート状物。 ３ 光透過部が少なくとも0.1mmの線幅を有する
細線からなり、かつ１辺が30mmを越えない格子模
様からなる特許請求の範囲第１項記載の部分光透
過性再帰性反射シート状物。 ４ 光透過部が少なくとも0.2mmの直径を有する
略円形からなる特許請求の範囲第１項記載の部分
光透過性再帰性反射シート状物。 ５ 一定の光学的関係を維持した、主として透明
性表面樹脂層、透明微小球子、焦点樹脂層および
光反射層からなる再帰性反射シート状物を、所定
の模様が突出した面を有する充分に加熱されたエ
ンボスロールと対向ロールとの間で、前記再帰性
反射シート状物の光反射層側をエンボスロール面
に向けて挾圧しつつ送行させ、光反射層に部分的
に光透過部を設けることを特徴とする部分光透過
性再帰性反射シート状物の製造方法。[Scope of Claims] 1. A retroreflective sheet-like article mainly consisting of a transparent surface resin layer, transparent microspheres, a focusing resin layer, and a light reflecting layer, which maintain a certain optical relationship, the retroreflective sheet 1. A partially light-transmitting retroreflective sheet-like article, characterized in that the light-reflecting layer of the sheet-like article has a light-transmitting part having an exclusive area of 10 to 80%. 2. The partially light-transmissive retroreflective sheet-like article according to claim 1, wherein the light-transmitting portion is composed of thin lines having a line width of at least 0.1 mm. 3. The partially light-transmissive retroreflective sheet-like article according to claim 1, wherein the light-transmitting portion is composed of thin lines having a line width of at least 0.1 mm and has a grid pattern with one side not exceeding 30 mm. 4. The partially light-transmitting retroreflective sheet-like article according to claim 1, wherein the light-transmitting portion is substantially circular with a diameter of at least 0.2 mm. 5. A retroreflective sheet-like material mainly consisting of a transparent surface resin layer, transparent microspheres, a focusing resin layer, and a light reflecting layer, which maintains a certain optical relationship, is sufficiently The light-reflecting layer side of the retroreflective sheet is conveyed between a heated embossing roll and an opposing roll while being pinched and pressed toward the embossing roll surface, and a light-transmitting portion is partially provided in the light-reflecting layer. A method for producing a partially light-transmitting retroreflective sheet material, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57095722A JPS58211441A (en) | 1982-06-04 | 1982-06-04 | Partial light-transmitting recurrence reflecting sheet-shaped material and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57095722A JPS58211441A (en) | 1982-06-04 | 1982-06-04 | Partial light-transmitting recurrence reflecting sheet-shaped material and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58211441A JPS58211441A (en) | 1983-12-08 |
| JPH0380101B2 true JPH0380101B2 (en) | 1991-12-20 |
Family
ID=14145360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57095722A Granted JPS58211441A (en) | 1982-06-04 | 1982-06-04 | Partial light-transmitting recurrence reflecting sheet-shaped material and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58211441A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101044539A (en) * | 2004-10-18 | 2007-09-26 | 3M创新有限公司 | Dynamic information sign |
-
1982
- 1982-06-04 JP JP57095722A patent/JPS58211441A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58211441A (en) | 1983-12-08 |
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