JPH0318860A - Transmitting sheet - Google Patents
Transmitting sheetInfo
- Publication number
- JPH0318860A JPH0318860A JP1154122A JP15412289A JPH0318860A JP H0318860 A JPH0318860 A JP H0318860A JP 1154122 A JP1154122 A JP 1154122A JP 15412289 A JP15412289 A JP 15412289A JP H0318860 A JPH0318860 A JP H0318860A
- Authority
- JP
- Japan
- Prior art keywords
- metal powder
- ink
- printing
- film
- light
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 56
- 239000002184 metal Substances 0.000 claims abstract description 56
- 239000000843 powder Substances 0.000 claims abstract description 52
- 238000007639 printing Methods 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 2
- 239000000976 ink Substances 0.000 description 53
- 230000003287 optical effect Effects 0.000 description 10
- 229920002799 BoPET Polymers 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 229940097275 indigo Drugs 0.000 description 3
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001361 White metal Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000010969 white metal Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、例えば電子写真装置または静電記録装置等に
用いられる透過性シートに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transparent sheet used, for example, in electrophotographic devices or electrostatic recording devices.
（従来の技術）
従来、この種の透過性シートとしては、例えばオーバー
ヘットプロジェクタ（ＯＨＰ）に供される透明なポリエ
チレンテレフタレート（ＰＥＴ）フィルムがある。この
よりなＰＥＴフィルムを転写材として通紙する電子写真
装置においては、紙詰まり等の事故を検知するために、
例えば光源からの光を転写材に当て、この反射光の有無
あるいは透過光の有無をフォトセンサにより検出する光
学的検知手段が設けられている。ところで、ＰＥＴフィ
ルムは光を透過してしまい、光学的検出手段では検知し
にくいため、検知精度を上げるべく透過性シートの改良
が種々提案されている。(Prior Art) Conventionally, this type of transparent sheet includes, for example, a transparent polyethylene terephthalate (PET) film used in an overhead projector (OHP). In electrophotographic devices that pass this thick PET film as a transfer material, in order to detect accidents such as paper jams,
For example, an optical detection means is provided that illuminates the transfer material with light from a light source and detects the presence or absence of reflected light or transmitted light using a photosensor. Incidentally, since PET film transmits light and is difficult to detect with optical detection means, various improvements to transparent sheets have been proposed in order to increase detection accuracy.
例えば、特開昭５８−１０６５５０号公報では、透明フ
ィルムの端部に剥離可能な不透明の部材を設けるという
提案がなされている。また、特開昭５８−１０５１５７
号公報には、可視光を遮蔽すべくＪＩＳ Ｐ−８１３
８による不透明度が６０％以上の塗布層を形成したもの
が、さらに、特開昭５９−７３６７号公報には、赤外光
を遮蔽すべくフィルム全体に金属を蒸着したものが提案
されている。For example, Japanese Patent Laid-Open No. 58-106550 proposes providing a peelable opaque member at the end of a transparent film. Also, JP-A-58-105157
The publication contains JIS P-813 to block visible light.
8, in which a coating layer with an opacity of 60% or more is formed, and JP-A-59-7367 proposes a film in which a metal is vapor-deposited over the entire film in order to block infrared light. .
（発明が解決しようとする課題）
しかしながら、上記した従来技術の場合には、例えば不
透明部材を設けたものであれば、不透明部材の段差によ
り通紙時に電子写真装置内で引っかかったり、あるいは
透過性シート上のトナー像を定着させる時に、段差の部
分による通紙ショックによって未定着部のトナー像が乱
れる等の恐れがあった。(Problems to be Solved by the Invention) However, in the case of the above-mentioned prior art, for example, if an opaque member is provided, the paper may get caught in the electrophotographic device when passing due to the step of the opaque member, or the transparent material When fixing the toner image on the sheet, there is a fear that the toner image in the unfixed area may be disturbed due to the paper passing shock caused by the stepped portion.
また、可視光遮蔽の塗布層は、安価な光源として通常用
いられるＬＥＤ光源からの赤外線レベルの光に対して遮
蔽性が悪く、さらに塗布幅が狭い場合には信号の検知時
間が短くなるために、検知精度が低下してしまう。In addition, the visible light shielding coating layer has poor shielding properties against infrared light from an LED light source, which is commonly used as an inexpensive light source, and furthermore, if the coating width is narrow, the signal detection time will be shortened. , the detection accuracy will decrease.
さらに、フィルム全体への金属蒸着によれば、フィルム
自体の可視光透過率が低くなり、透過画像としてＯＨＰ
に供した場合、画像が暗くなってしまうほか、真空装置
を用いて蒸着するためフィルム自体の価格が上ってしま
うなどの欠点があった。Furthermore, metal vapor deposition on the entire film lowers the visible light transmittance of the film itself, making it possible to display OHP as a transmitted image.
If the film is subjected to evaporation, the image becomes dark, and the price of the film itself increases because the film is deposited using a vacuum device.
また一方で、透過型の検知手段は光源とフォトセンサの
配置間隔が離れているので位置精度を保障しにくく、検
知精度が不安定なため、より高精度な反射型の検知手段
を採用したり、１つの装置内で必要に応じて両者を使い
分けて信頼性を高めようという提案がなされているが、
反射および透過（遮蔽）の両特性を満足する透過性シー
トは存在しなかった。On the other hand, since the distance between the light source and the photosensor is far apart in the transmission type detection means, it is difficult to guarantee positional accuracy, and the detection accuracy is unstable, so a reflective type detection means with higher accuracy is adopted. There have been proposals to increase reliability by using both in one device as needed.
There has not been a transparent sheet that satisfies both reflection and transmission (shielding) characteristics.
本発明は上記した従来技術の課題を解決するためになさ
れたもので、その目的とするところは、赤外光に対して
反射特性と遮蔽特性を両立し、しかも通紙性９価格的に
優れた透過性シートを提供することにある。The present invention has been made in order to solve the problems of the prior art described above, and its purpose is to achieve both reflection and shielding properties for infrared light, as well as excellent paper passing properties and an inexpensive price. The object of the present invention is to provide a transparent sheet with a transparent structure.
（課題を解決するための手段）
上記目的を達成するために本発明にあっては、シート面
に不透明部を形成して成る透過性シートにおいて、前記
不透明部は、印刷用有色インクに金属粉を混入して得ら
れた金属粉含有インクな用いて印刷されることを特徴と
する。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a transparent sheet having an opaque portion formed on the sheet surface, in which the opaque portion is coated with metal powder in colored ink for printing. It is characterized in that it is printed using a metal powder-containing ink obtained by mixing.
なお、前記金属粉は、鱗片形状を有する粒子であること
が効果的である。Note that it is effective that the metal powder is a particle having a scale shape.
また、前記金属粉含有インクにおける金属粉の占める重
量比を２〜２０％に設定することが効果的である。Furthermore, it is effective to set the weight ratio of the metal powder in the metal powder-containing ink to 2 to 20%.
（作 用）
上記構成を有する本発明にあっては、不透明部を印刷用
有色インクに金属粉を混入して得られた金属粉含有イン
クを用いて印刷することにより、８ｏＯ〜１１０００ｎ
の波長を有する赤外光が、インク成分によって３０％以
下しか透過せず、さらに金属粉によって６０％以上の反
射率が得られ、遮蔽特性および反射特性を両立できる。(Function) In the present invention having the above-mentioned configuration, the opaque portion is printed using a metal powder-containing ink obtained by mixing metal powder into colored printing ink.
Only 30% or less of infrared light having a wavelength of 200 nm is transmitted by the ink components, and a reflectance of 60% or more can be obtained by the metal powder, making it possible to achieve both shielding properties and reflective properties.
なお、金属粉の粒子を鱗片形状とすることにより、反射
面における金属粉の占める面積を大きくでき、反射特性
を改善できる。Note that by forming the metal powder particles into a scale shape, the area occupied by the metal powder on the reflective surface can be increased, and the reflection characteristics can be improved.
また、金属粉含有インクにおける金属粉の占める重量比
を２〜２０％に設定することにより、金属粉が少な過ぎ
るために起る反射特性の低下な防ぐと共に、多過ぎた場
合に金属粉が印刷された不透明部から脱落してしまうこ
とを防止する。In addition, by setting the weight ratio of metal powder in the metal powder-containing ink to 2 to 20%, it is possible to prevent deterioration of reflective properties that would occur due to too little metal powder, and to prevent the metal powder from printing if there is too much metal powder. This prevents it from falling off from the opaque part.
（実 施 例）
以下に、本発明を図示の実施例に基づいて説明する。第
１図は本発明の一実施例に係る透過性シートを示す図で
あり、１は透過性シートとしての透明フィルム、２は本
発明による不透明部で、印刷用有色インクに金属粉を混
入して得られた金属粉含有インクを用いて透明フィルム
１上に印刷されており、光学的検出手段による検知部に
相当する。透明フィルム１は、最高使用温度が１００℃
以上の耐熱性の樹脂フィルムで、例えば、ポリエステル
、ポリアミド、ポリアミドイミド等の樹脂が用いられる
。特にポリエチレンテレフタレート（ＰＥＴ）は耐熱性
及び透明性の点で好ましい、フィルム厚は、電子写真装
置であれば定着時の加熱によってシワ等が発生しないよ
う５０μｍ以上必要であり、透明性を確保する為には２
００μｍ以下が好ましい、透明フィルムｌの表面は必要
に応じて、マット化と呼ばれる粗し処理、帯電防止処理
、定着性を向上させる為の塗布層の形成等を行っても良
い。(Example) The present invention will be explained below based on the illustrated example. FIG. 1 is a diagram showing a transparent sheet according to an embodiment of the present invention, in which 1 is a transparent film as a transparent sheet, 2 is an opaque part according to the present invention, and the colored ink for printing is mixed with metal powder. It is printed on the transparent film 1 using an ink containing metal powder obtained by the process, and corresponds to a detection section by an optical detection means. The maximum operating temperature of transparent film 1 is 100℃
For the above-mentioned heat-resistant resin film, resins such as polyester, polyamide, polyamideimide, etc. are used. Polyethylene terephthalate (PET) is particularly preferred in terms of heat resistance and transparency. For electrophotographic equipment, the film thickness must be at least 50 μm to prevent wrinkles from occurring due to heating during fixing, and to ensure transparency. to 2
The surface of the transparent film 1, which preferably has a diameter of 00 μm or less, may be subjected to a roughening treatment called matting, an antistatic treatment, and the formation of a coating layer to improve fixing properties, as necessary.
不透明部２は、第１図（ａ）〜（ｃ）に示される如く、
透明フィルム１の縁に沿って設けられ、たとえば、同図
（ａ）の如く四辺のうちの１辺、あるいは同図（ｂ）の
如く四辺のうち２辺に設けられる。さらには、図示しな
いが３辺、４辺全部に設けても良い、また、不透明部２
は、同図（Ｃ）に示す如く、この透明フィルム１を供し
て画像形成を行う電子写真装置内に設けられた光センサ
の検知位置に対応する縁に沿って部分的に設けても良い
。As shown in FIGS. 1(a) to 1(c), the opaque portion 2 is
They are provided along the edge of the transparent film 1, for example, on one of the four sides as shown in FIG. 2(a), or on two of the four sides as shown in FIG. Furthermore, although not shown, it may be provided on all three or four sides, or the opaque portion 2
As shown in FIG. 2C, the transparent film 1 may be partially provided along the edge corresponding to the detection position of a photosensor provided in an electrophotographic apparatus that forms an image using the transparent film 1.
不透明部２の幅りは、用いられる装置の通紙速度と、光
センサの感度によって適宜設定すれば良いが、少なくと
も用いる透明フィルム厚み以上は必要となる。というの
も、フィルム厚み以下では、光センサによる不透明部２
の検知レベルが、フィルム端面での乱反射等による検知
レベルと等しくなり、信号と雑音の区別がつき難くなる
ためである。また、幅りの上限は、より幅広であれば光
センサの感度を落すことが可能となるが、画像形成幅と
の兼ね合いから適正幅を選択すれば良い。The width of the opaque portion 2 may be appropriately set depending on the paper passing speed of the device used and the sensitivity of the optical sensor, but it needs to be at least as thick as the transparent film used. This is because below the film thickness, the opaque area 2 is detected by the optical sensor.
This is because the detection level becomes equal to the detection level due to diffused reflection on the film end face, etc., making it difficult to distinguish between signals and noise. Further, as for the upper limit of the width, if the width is wider, the sensitivity of the optical sensor can be lowered, but an appropriate width may be selected in consideration of the image forming width.
第１図（ｄ）に示す不透明部２の厚さＨは、１μｍ以上
１００ＬＬｍ以下、好ましくは４０μｍ以下である。１
００μｍ以上では、段差による影響で、不透明部２近傍
の画像に影響を及ぼしてしまう、また、１μｍ以下では
不透明部２の印刷ムラによる誤動作がありえる。The thickness H of the opaque portion 2 shown in FIG. 1(d) is 1 μm or more and 100 LLm or less, preferably 40 μm or less. 1
If it is 00 μm or more, the image near the opaque portion 2 will be affected by the difference in level, and if it is 1 μm or less, malfunctions may occur due to printing unevenness in the opaque portion 2.
不透明部２の材質に要求される赤外光に対する反射およ
び遮蔽の特性は、赤外光領域における波長８００〜１１
０００ｎの光を３０％以下しか透過せず、かつ反射（正
反射でなく、４５°入射光による乱反射光、第２図に示
す）で６０％以上を検出可能にすることである。なお、
３０％を越える透過率では、センサ受光部、あるいは光
源側となるＬＥＤＩＩの窓材８表面が空気中のゴミ、装
置内のトナー、及び紙粉等で汚れた場合、印刷による信
号と、汚れによる信号のレベルが判別できないこととな
る。好ましくは、透過率で１０％以下が良い、但し、こ
の条件は、９４０ｎｍピークのＬＥＤを用い放射出力４
６ｍＷ／ｓｒ（駆動電流Ｉｒ＝５０ｍＡ時）の時、受光
素子が９００ｎｍビークで光電流３０４μＡを示す測定
条件の場合である。The reflection and shielding properties for infrared light required of the material of the opaque part 2 are as follows:
The objective is to transmit only 30% or less of the 000n light, and to make it possible to detect 60% or more by reflection (not specular reflection, but diffusely reflected light by 45° incident light, as shown in FIG. 2). In addition,
If the transmittance exceeds 30%, if the sensor light receiving part or the surface of the LED II window material 8 on the light source side becomes dirty with dust in the air, toner inside the device, paper powder, etc., the printed signal and the dirt This means that the signal level cannot be determined. Preferably, the transmittance is 10% or less. However, this condition requires that an LED with a peak wavelength of 940 nm be used and a radiation output of 4
This is a case of measurement conditions in which the photodetector exhibits a photocurrent of 304 μA at a peak of 900 nm at 6 mW/sr (when driving current Ir=50 mA).
反射については、第２図に示すＬＥＤＩＩを用いて、上
記放射出力、波長を有する光を測定体としての透明フィ
ルムｌ上の不透明部２へ４５°の角度から当て、その乱
反射光を受光素子（センサ）１２によって測定するもの
とする。このときの反射率は、測定体が白色普通紙の場
合の出力に対して、本発明の印刷による出力の占める割
合いで示す、なお、反射率としては、前述の如く６０％
以上が好ましく、これに満たない印刷の場合、装置内部
のボンデ鋼板等の金属部品による反射ノイズと印刷信号
とが判別しずらくなり、誤動作の原因となる。Regarding reflection, using the LED II shown in FIG. 2, light having the above radiation output and wavelength is applied to the opaque part 2 on the transparent film l as the measurement object from an angle of 45 degrees, and the diffusely reflected light is sent to the light receiving element ( (sensor) 12. The reflectance at this time is expressed as the ratio of the output by the printing of the present invention to the output when the measurement object is white plain paper.The reflectance is 60% as described above.
The above is preferable, and if the printing is less than this, it becomes difficult to distinguish between the print signal and the noise reflected by metal parts such as a bonded steel plate inside the apparatus, which may cause malfunction.
上記の反射率および透過率を満足するものとして、前述
したグラビアインク、紫外線硬化型インク等の通常印刷
用有色インクに若干の金属粉な混入せしめた金属粉含有
インクを挙げることができる。以下に、具体的に述べる
。As an ink that satisfies the above-mentioned reflectance and transmittance, there may be mentioned an ink containing metal powder in which a small amount of metal powder is mixed into the usual colored ink for printing such as the above-mentioned gravure ink or ultraviolet curing ink. The details will be described below.
本発明にかかる条件を満足する印刷は、白色のグラビア
インク、あるいは紫外線硬化型インクに墨、黄、青、草
、紫、藍、茶のグラビアインク。Printing that satisfies the conditions according to the present invention is white gravure ink, or ultraviolet curable ink with ink, yellow, blue, grass, purple, indigo, or brown gravure ink.
紫外線硬化型インクを混ぜ、これにアルミニウム、銀、
パラジウム、亜鉛等の灰白色金属粉を混入したものであ
る０割合いとしては、白色インクｌに対して上記インク
の少なくとも１つを０゜１〜１の割合いで混合したもの
をベースインク（印刷用有色インク）とし、このインク
へ上記金属粉を重量比で２％〜２０％（以下、全重量に
占める本材料の重量の割合を２重量％、２０重量％のよ
うに記す）になるように混入したものを用いれば良い、
但し、アルミニウム等の金属粉の混入量は２重量％以下
では１反射特性において、装置内部の黒色塗装との差が
大きく取れず、前述測定法では２倍〜２．５倍の反射強
度しかなく、誤動作の可能性がある。好ましくは、４重
量％以上の混入量があれば良い、また、金属粉が２０重
量％を越えると印刷部から金属粉が脱落し易くなり、装
置内、特に感光体等を損傷する可能性がある。Mix ultraviolet curable ink with aluminum, silver,
A base ink containing gray-white metal powder such as palladium, zinc, etc., is a base ink (printing grade Colored ink), and the metal powder is added to this ink at a weight ratio of 2% to 20% (hereinafter, the weight ratio of this material to the total weight is expressed as 2% by weight, 20% by weight, etc.). You can use the mixed one.
However, if the amount of mixed metal powder such as aluminum is less than 2% by weight, it will not be possible to obtain a large difference in 1 reflection characteristic from the black paint inside the device, and the above measurement method will only result in a reflection intensity that is 2 to 2.5 times higher. , there is a possibility of malfunction. Preferably, the mixed amount should be 4% by weight or more, and if the amount of metal powder exceeds 20% by weight, the metal powder will easily fall off from the printing area, and there is a possibility of damaging the inside of the device, especially the photoreceptor etc. be.
そして、金属粉の形状は鱗片状とし、厚さは１μｍ以下
、巾は５〜数１０ｇｍ最大５０μｍ程度のものを用いれ
ば良い。The metal powder may have a scale-like shape, a thickness of 1 μm or less, a width of 5 to several tens of grams, and a maximum of about 50 μm.
次にベースとなる印刷用有色インクについて述べると、
８０ＯＮ１０００ｎｍの赤外光を遮蔽するには白色イン
クが５０重量％になるように混合する。但し、黄、草な
どの色を用いる場合、白色あるいは墨を混入して用いる
ことが好ましい、また、反射特性を強める為には、紫、
藍、青果の色は余り好ましくない、この場合は金属粉を
多少多く用いる必要がある。Next, let's talk about the basic colored ink for printing.
In order to block infrared light of 1000 nm in 80ON, white ink is mixed in an amount of 50% by weight. However, when using colors such as yellow or grass, it is preferable to mix white or black ink, and in order to strengthen the reflective properties, purple,
The colors of indigo and fruits and vegetables are not so desirable; in this case, it is necessary to use more or less metal powder.
以下、さらに詳しく金属粉含有インクの成分に言及しな
がら、本発明の詳細な説明する。Hereinafter, the present invention will be described in detail with reference to the components of the metal powder-containing ink.
（第１の実施例）
白色インクｌに対し墨インクを０．８の割合で混ぜてベ
ースインクを作成し、このベースインクに対して重量％
で１０％、７．５％、５％、比較例として２６５％、０
％となるようにアルミニウム粉をそれぞれ混入して、金
属粉含有インク５種類を得た。用いたインクは全て紫外
線硬化型ウレタン樹脂系のインクである。(First Example) A base ink is prepared by mixing black ink with 1 of white ink at a ratio of 0.8, and the percentage by weight of this base ink is
10%, 7.5%, 5%, 265%, 0 as a comparative example
% of aluminum powder to obtain five types of metal powder-containing inks. All inks used were ultraviolet curing urethane resin inks.
次に、厚さ１００μｍ１耐熱温度１５０℃のＰＥＴフィ
ルム（透明フィルムｌ）に第１図（ａ）のように、上記
５種類のインクを厚さＨ＝１５μｍ、印刷幅Ｌ＝８ｍｍ
になるように、スクリーン印刷し、これを軽圧水銀ラン
プからの紫外線により硬化した。得られた印刷、即ち不
透明部２は、銀灰色を示している。但し０％のものは黒
灰色であった。下記表１に反射と透過特性、およびＬＥ
ＤＩＩ（波長９８０ ｎｍ）とセンサ１２から成る光学
的検知手段を有する電子写真装置での通紙試験を同時に
示す０表１に示すように、アルミニウム金属粉を混入す
ることで赤外光の透過特性を落すことなく赤外光の反射
光量を増加することができ、遮蔽特性と反射特性とを両
立している。しかも、８００〜１１０００ｎという赤外
光の反射率は、２倍以上に高められている。また、従来
の白色タイプのインクを用いるよりも赤外光表
０：良好
○Δ：誤検知（１０００枚中１Ｎ２枚）×：通紙せず
反射率は、白色度８４％、平滑度６０秒の紙を１００％
として表示しである。Next, as shown in Fig. 1(a), the above five types of inks were applied to a PET film (transparent film l) with a thickness of 100 μm and a heat-resistant temperature of 150°C at a thickness H = 15 μm and a printing width L = 8 mm.
This was screen printed and cured with ultraviolet light from a light pressure mercury lamp. The resulting print, ie the opaque area 2, exhibits a silver-gray color. However, the color of 0% was black gray. Table 1 below shows reflection and transmission characteristics, and LE
As shown in Table 1, which simultaneously shows a paper passing test using an electrophotographic device having an optical detection means consisting of a DII (wavelength: 980 nm) and a sensor 12, the infrared light transmission characteristics can be improved by mixing aluminum metal powder. It is possible to increase the amount of reflected infrared light without reducing the amount of light, and it has both shielding properties and reflective properties. Moreover, the reflectance of infrared light of 800 to 11,000 nm is more than doubled. In addition, compared to using conventional white type ink, the infrared light resistance is 0: Good ○ Δ: False detection (1N2 sheets out of 1000 sheets) ×: No paper passing The reflectance is 84% whiteness and 60 seconds smoothness 100% paper
It is displayed as .
の透過率を１０分の１〜１００分のｌ迄、安定して低下
させることができ、ＬＥＤランプ（ＬＥＤｌｌ）やフォ
トトランジスタ（センサ１２）等の精度によらず信頼性
の高い検知が可能となる。It is possible to stably reduce the transmittance of 1/10 to 1/100, and highly reliable detection is possible regardless of the accuracy of the LED lamp (LEDll) or phototransistor (sensor 12). Become.
（第２の実施例）
グラビア印刷用白インクと、黄色インクを１＝１に混ぜ
合わせたものをベースインク（印刷用有色インク）とし
て、これに重量％で６％となるようにアルミニウム粉を
混ぜ印刷インク（金属含有インク）とした。(Second Example) A base ink (colored ink for printing) is a mixture of white ink for gravure printing and yellow ink in a ratio of 1=1, and aluminum powder is added to this in an amount of 6% by weight. A mixed printing ink (metal-containing ink) was used.
次に前記ＰＥＴフィルム（透明フィルム１）の端面に、
厚さ３０μｍ中８ｍｍになるように印刷し、乾燥させた
。得られた印刷（不透明部２）は金色のものであった。Next, on the end surface of the PET film (transparent film 1),
It was printed to a thickness of 8 mm out of 30 μm and dried. The resulting print (opaque area 2) was golden in color.
この不透明部２について９８０ｎｍの赤外ＬＥＤ光を用
いて反射特性を測定したところ、７０％を示し、透過率
は３％以下で良好な遮蔽性を示した。When the reflection characteristics of this opaque portion 2 were measured using 980 nm infrared LED light, it was found to be 70%, and the transmittance was 3% or less, indicating good shielding properties.
この透明フィルムｌを同上のＬＥＤＩＩと対をなすセン
サ１２かうなる光学的検知手段を数ケ所に配置した電子
写真装置にかけ通紙試験を行なったところ、何ら誤検知
もなく良好な結果を得た。When this transparent film 1 was subjected to an electrophotographic apparatus equipped with optical detection means such as the sensor 12 paired with the above-mentioned LED II arranged at several locations, a paper passing test was performed, and no false detections were found, and good results were obtained.
（第３の実施例）
紫外線硬化型のアクリル塗料の白色、黄色、赤色、藍１
をそれぞれ１００ニア５：１５：ｌ：５の割合で混ぜ合
わせたものをベースインク（印刷用有色インク）としこ
れに重量％で８％となるようにアルムニウム粉を混ぜ印
刷インク（金属粉含有インク）を得た。(Third Example) White, yellow, red, and indigo UV-curable acrylic paints 1
A base ink (colored ink for printing) is prepared by mixing 100 Nia in a ratio of 5:15:1:5, and aluminum powder is mixed to this in a weight percentage of 8% to make a printing ink (metal powder-containing ink). ) was obtained.
次に前記ＰＥＴフィルム（透明フィルム１）の端面に、
厚さＨ＝２０ｕｍ、幅Ｌ＝８ｍｍになるように印刷し、
軽圧水銀ランプによる紫外線により硬化した。得られた
印刷（不透明部２）は赤銅色であった。Next, on the end surface of the PET film (transparent film 1),
Print so that the thickness H = 20um and the width L = 8mm,
Cured by ultraviolet light from a light pressure mercury lamp. The resulting print (opaque area 2) was coppery red.
これも、第１および第２の実施例と同様の試験を行った
結果、反射率８２％、透過率８％を示し、また、通紙試
験も良好であった。なお、上記第２および第３の実施例
で示した金属分含有インクから、金属粉を省いたものを
同様にＰＥＴフィルムに印刷し、通紙試験にかけたとこ
ろ、第２の実施例に対応するインクでは反射型、透過型
いずれの光学的検知の手段でも検知されなかった。また
、第３の実施例に対応するインクでは、反射型で誤動作
が発生した。This also showed a reflectance of 82% and a transmittance of 8% as a result of conducting the same tests as in the first and second examples, and the paper passing test was also good. In addition, when the metal-containing ink shown in the second and third examples above without the metal powder was similarly printed on PET film and subjected to a paper passing test, the results corresponded to those in the second example. The ink was not detected by either reflective or transmissive optical detection means. Further, with the ink corresponding to the third example, a malfunction occurred in the reflective type.
なお、上記実施例では透過性シートとしてＰＥＴフィル
ム等の樹脂フィルムを例示したが、例えば他にトレーシ
ングペーパーや操薄の用紙などに対しても本発明は実施
可能である。In the above embodiments, a resin film such as a PET film is used as the transparent sheet, but the present invention can also be applied to other materials such as tracing paper and thin paper.
（発明の効果）
本発明は、以上の構成および作用を有するもので、不透
明部を印刷用有色インクに金属粉を混入して得られた金
属粉含有インクを用いて印刷することにより、８００〜
ｌｏｏｏｎｍの波長を有する赤外光が、インク成分によ
って７０％以上遮蔽されると共に、金属粉によって６０
％以上の反射率が得られ、遮蔽特性および反射特性を両
立できろ、従って、赤外光を用いる透過、反射面タイプ
の光センサに対応し得る透過性シートを作製でき、赤外
光は本来的に外光の影響を受は難いため、粉体等の汚れ
を発生しやすい電子写真装置において、より信頼性の高
い検知が可能となる。(Effects of the Invention) The present invention has the above-described configuration and operation, and by printing an opaque part using a metal powder-containing ink obtained by mixing metal powder into colored printing ink, it is possible to
More than 70% of infrared light with a wavelength of 100 nm is blocked by the ink components, and 60% by the metal powder.
% or more, and can have both shielding and reflection properties. Therefore, it is possible to produce a transparent sheet that can be used for transmissive and reflective surface type optical sensors that use infrared light. Since it is not easily affected by external light, more reliable detection is possible in an electrophotographic device that is prone to dirt such as powder.
また１、赤外光の反射率を金属粉の混入により高めるこ
とができ、例えば従来の金属蒸着に比べて、より簡単で
しかも低コストで不透明部を作成できる。In addition, 1. The reflectance of infrared light can be increased by mixing metal powder, and opaque parts can be created more easily and at lower cost than, for example, conventional metal vapor deposition.
さらに、印刷により不透明部を形成するので、透過性シ
ート上での段差を極小レベルに設定でき、通紙性に優れ
る。Furthermore, since the opaque portion is formed by printing, the level difference on the transparent sheet can be set to an extremely small level, resulting in excellent paper passing properties.
なお、金属粉の粒子を鱗片形状とすることにより、反射
面における金属粉の占める面積を大きくでき、反射特性
を改善できる。Note that by forming the metal powder particles into a scale shape, the area occupied by the metal powder on the reflective surface can be increased, and the reflection characteristics can be improved.
また、金属粉含有インクにおける金属粉の占める重量比
を２〜２０％に設定することにより、金属粉が少な過ぎ
るために起る反射特性の低下や、多過ぎた場合に起る金
属粉の印刷された不透明部からの脱落を防止することが
できる。In addition, by setting the weight ratio of metal powder in the metal powder-containing ink to 2 to 20%, it is possible to prevent the reduction of reflection characteristics caused by too little metal powder, or the printing of metal powder that occurs if there is too much metal powder. It is possible to prevent the film from falling off from the opaque part.
第１図は本発明の第１実施例に係る透過性シートを示す
外観図、第２図は第１図に示した透過性シートの検知状
態を示す図である。
符号の説明
ｌ・・・透明フィルム
２・・・不透明部
（透過性シート）
１１・・・ＬＥＤ
１２・・・センサFIG. 1 is an external view showing a transparent sheet according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a detection state of the transparent sheet shown in FIG. 1. Explanation of symbols l... Transparent film 2... Opaque part (transparent sheet) 11... LED 12... Sensor
Claims (3)
において、 前記不透明部は、印刷用有色インクに金属粉を混入して
得られた金属粉含有インクを用いて印刷されることを特
徴とする透過性シート。(1) A transparent sheet having an opaque portion formed on the sheet surface, characterized in that the opaque portion is printed using ink containing metal powder obtained by mixing metal powder into colored printing ink. transparent sheet.
を特徴とする請求項１記載の透過性シート。(2) The permeable sheet according to claim 1, wherein the metal powder is a particle having a scale shape.
量比が２〜２０％であることを特徴とする請求項１また
は請求項２記載の透過性シート。(3) The permeable sheet according to claim 1 or 2, wherein the weight ratio of the metal powder in the metal powder-containing ink is 2 to 20%.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1154122A JPH0318860A (en) | 1989-06-16 | 1989-06-16 | Transmitting sheet |
| DE69023283T DE69023283T2 (en) | 1989-06-16 | 1990-06-15 | Output sheet for image forming device and image forming device using the sheet. |
| EP90306579A EP0403310B1 (en) | 1989-06-16 | 1990-06-15 | Output sheet for image forming device and image forming device by use of the sheet |
| US07/539,887 US5151313A (en) | 1989-06-16 | 1990-06-18 | Output sheet for image forming device and image forming device by use of the sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1154122A JPH0318860A (en) | 1989-06-16 | 1989-06-16 | Transmitting sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0318860A true JPH0318860A (en) | 1991-01-28 |
Family
ID=15577402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1154122A Pending JPH0318860A (en) | 1989-06-16 | 1989-06-16 | Transmitting sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0318860A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572291A (en) * | 1992-04-30 | 1996-11-05 | Canon Kabushiki Kaisha | Image forming method, image forming apparatus and transparent film |
-
1989
- 1989-06-16 JP JP1154122A patent/JPH0318860A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572291A (en) * | 1992-04-30 | 1996-11-05 | Canon Kabushiki Kaisha | Image forming method, image forming apparatus and transparent film |
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