JP4561415B2 - Water vapor permeability measuring apparatus and water vapor permeability measuring method - Google Patents

Water vapor permeability measuring apparatus and water vapor permeability measuring method Download PDF

Info

Publication number
JP4561415B2
JP4561415B2 JP2005069797A JP2005069797A JP4561415B2 JP 4561415 B2 JP4561415 B2 JP 4561415B2 JP 2005069797 A JP2005069797 A JP 2005069797A JP 2005069797 A JP2005069797 A JP 2005069797A JP 4561415 B2 JP4561415 B2 JP 4561415B2
Authority
JP
Japan
Prior art keywords
water vapor
test piece
corrosion
area candidate
corrosion area
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 - Fee Related
Application number
JP2005069797A
Other languages
Japanese (ja)
Other versions
JP2006250816A (en
Inventor
賢一 兼政
寿 伊東
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP2005069797A priority Critical patent/JP4561415B2/en
Publication of JP2006250816A publication Critical patent/JP2006250816A/en
Application granted granted Critical
Publication of JP4561415B2 publication Critical patent/JP4561415B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

本発明は、水蒸気透過度を精度良く測定する装置及び方法に関するものである。 The present invention relates to an apparatus and method for accurately measuring water vapor permeability.

水分が透過することで材料の特性が低下する現象が昔から確認されている。例えば、鉄表面に亜鉛やアルミ等のメッキを施したメッキ鋼板や表面処理鋼板では、メッキ材の欠陥を通して水分が浸透しサビを発生させる。また、プラスチック表面に酸化ケイ素、酸化アルミまたはアルミ金属箔を蒸着した食品や薬品の包装材料では蒸着膜の欠陥を通して水蒸気が拡散し、食品または薬品に吸湿する等の問題が発生する。更に最近では、電子・電気装置の包装材料や液晶表示素子、有機ＥＬ表示素子のようなハイレベルな防湿性が要求されるプラスチックフィルムの開発がなされているため、吸湿を防止するためのバリア膜の開発が非常に活発に行なわれている。   It has been confirmed for a long time that the properties of materials deteriorate due to the permeation of moisture. For example, in a plated steel sheet or a surface-treated steel sheet in which zinc or aluminum is plated on the iron surface, moisture penetrates through defects in the plated material and generates rust. In addition, in a packaging material for foods and chemicals in which silicon oxide, aluminum oxide or aluminum metal foil is vapor-deposited on the plastic surface, water vapor is diffused through defects in the deposited film, causing problems such as moisture absorption by the food or chemicals. More recently, plastic films that require high levels of moisture-proofing, such as packaging materials for electronic and electrical devices, liquid crystal display elements, and organic EL display elements, have been developed, and therefore barrier films for preventing moisture absorption. The development of is very active.

従来から検討されている水蒸気透過度の評価は、カップ法（非特許文献１）、モコン法(非特許文献２)等であるが、ハイレベルな防湿性を評価することは不可能であった。モコン法の測定限界値は0.01g/m2/day程度であり、液晶基板や有機ＥＬ基板等に要求される10-3g/m2/day以下の水蒸気透過量は評価できない。 The evaluation of water vapor permeability that has been studied conventionally is the cup method (Non-patent document 1), the mocon method (Non-patent document 2), etc., but it has been impossible to evaluate a high level of moisture resistance. . The measurement limit value of the Mocon method is about 0.01 g / m 2 / day, and the water vapor transmission rate of 10 −3 g / m 2 / day or less required for liquid crystal substrates and organic EL substrates cannot be evaluated.

近年、カルシウムの腐食により、バリア膜付きプラスチックフィルムの防湿性を評価する方法が開発されている(例えば、非特許文献３、４)。この方法はバリア膜付きプラスチックフィルムのバリア欠陥を通して侵入した水分とカルシウムの反応を利用した測定方法である。内側に金属カルシウム膜を成膜したフィルム試験片を恒温恒湿環境下に置き、フィルムを透過した水蒸気と反応して腐食したカルシウムの量を画像処理等で測定することにより、フィルムの水蒸気透過量を測定する。このカルシウム腐食法による水蒸気透過量測定は従来のモコン法等と比べ非常に高感度な水蒸気透過量測定が可能である。     In recent years, methods for evaluating moisture resistance of a plastic film with a barrier film by corrosion of calcium have been developed (for example, Non-Patent Documents 3 and 4). This method is a measurement method using the reaction between moisture and calcium that has penetrated through a barrier defect of a plastic film with a barrier film. By placing a film specimen with a metal calcium film on the inside in a constant temperature and humidity environment, and measuring the amount of calcium corroded by reacting with water vapor that has passed through the film by image processing etc., the water vapor transmission rate of the film Measure. This water vapor permeation measurement by the calcium corrosion method can measure water vapor permeation with very high sensitivity compared with the conventional Mocon method.

カルシウム腐食法によるフィルムの水蒸気透過度測定の際には、試験片表面を撮影し、画像処理にてカルシウムが腐食している領域を抽出することによりカルシウムの腐食量を算出する。試験片表面に異物が存在すると腐食領域と誤認識し、カルシウム腐食量の算出に誤差が生じ、水蒸気透過度の測定の精度が低下する可能性がある。画像処理を用いた異物の検出方法としては抽出した欠陥候補の形状や色といった特徴に基づく判別方法が多数提案されている（例えば、特許文献１、２）。しかしながら、試験片表面に付着する異物が空気中の塵埃の場合、形状や色はさまざまであるためデータベース化はしにくく、また、異物とは分離すべきカルシウム腐食も一般には円形であるものの、複数が連なって複雑な形状となることも有り、形状や色の情報で試験片表面に付着した異物を画像処理で抽出判別することは難しいという問題がある。 When measuring the water vapor permeability of the film by the calcium corrosion method, the surface of the test piece is photographed, and the area where calcium is corroded is extracted by image processing to calculate the amount of calcium corrosion. If foreign matter is present on the surface of the test piece, it may be mistakenly recognized as a corroded region, an error may occur in the calculation of the amount of calcium corrosion, and the water vapor permeability measurement accuracy may be reduced. As a foreign object detection method using image processing, many discrimination methods based on characteristics such as the shape and color of extracted defect candidates have been proposed (for example, Patent Documents 1 and 2). However, when the foreign matter adhering to the surface of the test piece is dust in the air, it is difficult to create a database because the shape and color are various, and the calcium corrosion that should be separated from the foreign matter is generally circular, but there are multiple May form a complicated shape, and there is a problem that it is difficult to extract and discriminate foreign matter adhering to the surface of the test piece by image processing based on shape and color information.

ＪＩＳ Ｚ ０２０８JIS Z 0208 ＪＩＳ Ｋ ７１２９ Ｂ法JIS K 7129 method B Asia Display/IDW’01 pp.1435〜1438Asia Display / IDW’01 pp.1435〜1438 藤本ら、第１２回ポリマー材料フォーラム、ｐ．２００、２００３Fujimoto et al., 12th Polymer Material Forum, p. 200, 2003 特開２００４−０２０２５４号公報JP 2004-020254 A 特開平１０−２７４６５０号公報JP-A-10-274650

本発明は、試験片表面に付着した異物の悪影響を排除する高精度な水蒸気透過度測定装置及び水蒸気透過度測定方法を提供するものである。 The present invention provides a highly accurate water vapor transmission rate measuring device and a water vapor transmission rate measurement method that eliminate the adverse effects of foreign substances adhering to the surface of a test piece.

本発明は、
（１）カルシウム腐食法による試験片の水蒸気透過度測定装置であって、
試験片表面側の一方側斜め上方から所定の角度で照明光を照射する照明手段と、試験片表面側の他方側斜め上方で試験片からの反射光を撮影する撮影手段と、撮影手段から得られる画像から腐食領域候補を抽出する腐食領域候補抽出手段と、抽出された腐食領域候補から試験片表面異物を判別する表面異物判別手段とを備え、
前記表面異物判別手段が、特定の腐食領域候補に対して所定の方向に前記式（１）で算出される反射ずれ量だけずれた位置に他の腐食領域候補が存在するか検索し、両者の画像の幾何学的特徴が類似する場合に腐食領域候補を試験片表面異物と判別する処理機能を有することを特徴とする水蒸気透過度測定装置、
（２）カルシウム腐食法による試験片の水蒸気透過度測定方法であって、
試験片表面側の一方側斜め上方から所定の角度で照明光を照射し、試験片表面側の他方側斜め上方で試験片からの反射光を撮影し、得られた画像から腐食領域候補を抽出し、抽出された特定の腐食領域候補に対して所定の方向に前記式（１）で算出される反射ずれ量だけずれた位置に他の腐食領域候補が存在するか検索し、両者の画像の幾何学的特徴が類似する場合に腐食領域候補を試験片表面異物と判別することを特徴とする水蒸気透過度測定方法、
である。 The present invention
(1) A device for measuring water vapor permeability of a test piece by a calcium corrosion method,
Obtained from illumination means for irradiating illumination light at a predetermined angle from one side obliquely above the test piece surface side, photographing means for photographing reflected light from the test piece obliquely above the other side of the test piece surface side, and photographing means A corrosion area candidate extraction means for extracting a corrosion area candidate from the extracted image, and a surface foreign matter discrimination means for discriminating a test piece surface foreign substance from the extracted corrosion area candidate,
The surface foreign matter discriminating means searches whether there is another corrosion area candidate at a position shifted by a reflection deviation amount calculated by the equation (1) in a predetermined direction with respect to a specific corrosion area candidate. A water vapor transmission rate measuring device characterized by having a processing function of discriminating corrosion area candidates from test piece surface foreign matter when the geometrical features of the images are similar;
(2) A method for measuring water vapor permeability of a test piece by a calcium corrosion method,
Irradiate illumination light at a predetermined angle from one side obliquely above the specimen surface side, photograph the reflected light from the specimen diagonally above the other side of the specimen surface side, and extract corrosion area candidates from the obtained image Then, it is searched whether there is another corrosion area candidate at a position shifted by the reflection deviation amount calculated by the equation (1) in a predetermined direction with respect to the extracted specific corrosion area candidate. A method for measuring water vapor transmission rate, characterized by distinguishing corrosion area candidates from foreign matter on the specimen surface when the geometrical features are similar,
It is.

本発明によれば、カルシウム腐食法による水蒸気透過度測定装置において、試験片の表面に付着した異物の悪影響を測定結果から排除し、誤差を低減することが可能なため、精度の高い水蒸気透過度測定装置が提供可能となる。 According to the present invention, in the water vapor permeability measuring apparatus based on the calcium corrosion method, it is possible to eliminate the adverse effect of the foreign matter adhering to the surface of the test piece from the measurement result and reduce the error. A measuring device can be provided.

本発明は、カルシウム腐食法による水蒸気透過度測定装置において、試験片の表面に付着した異物を誤って腐食と判定することなく、高精度に水蒸気透過度を算出する水蒸気透過度測定装置及び水蒸気透過度測定方法である。   The present invention relates to a water vapor transmission rate measuring device using a calcium corrosion method, and a water vapor transmission rate measuring device and a water vapor transmission device that calculate water vapor transmission rate with high accuracy without erroneously determining foreign matter adhering to the surface of a test piece as corrosion. Degree measurement method.

図１は本発明の水蒸気透過度測定装置の一例を示す構成図である。試験片１に対し、照明手段２により斜め上方から所定の角度で照明光を照射する。照明手段２とは別方向の斜め上方に設置した撮影手段３により、試験片１を撮影する。試験片１からの正反射光を撮影手段３で捉えられるよう、試験片１と照明手段２と撮影手段３の位置と角度を設定する。腐食領域候補抽出手段４は撮影手段３で撮影した画像から特徴のある部分を抽出し、腐食領域の候補とする。撮影手段３で撮影した試験片１の画像は正反射光を捉えた明視野照明画像となっているため、カルシウムの腐食や異物は背景より暗い像となる。表面異物判別手段５は、腐食領域候補抽出手段４で得られた各腐食領域候補を所定の方向に所定の量だけずらした位置に特徴が類似する腐食領域候補が存在するかどうかを検索し、もし存在した場合はその腐食領域候補を表面異物と判定し腐食領域候補からは除外する。その後、表面異物判別手段５で表面異物とはみなされなかった腐食領域候補について、その面積から腐食に要した水蒸気量を算出し、水蒸気バリアフィルムの水蒸気透過度を求める。   FIG. 1 is a configuration diagram showing an example of a water vapor permeability measuring apparatus of the present invention. The test piece 1 is irradiated with illumination light at a predetermined angle from obliquely above by the illumination means 2. The test piece 1 is photographed by the photographing means 3 installed obliquely above in a different direction from the illumination means 2. The positions and angles of the test piece 1, the illuminating means 2 and the photographing means 3 are set so that the regular reflection light from the test piece 1 can be captured by the photographing means 3. The corrosion area candidate extraction means 4 extracts a characteristic part from the image photographed by the photographing means 3 and sets it as a corrosion area candidate. Since the image of the test piece 1 photographed by the photographing means 3 is a bright-field illumination image capturing regular reflection light, corrosion of calcium and foreign matter are darker than the background. The surface foreign matter discriminating means 5 searches whether or not there is a corroded area candidate having a similar feature at a position shifted from the corroded area candidate obtained by the corroded area candidate extracting means 4 by a predetermined amount in a predetermined direction. If it exists, the corrosion area candidate is determined as a surface foreign substance and is excluded from the corrosion area candidates. Thereafter, the amount of water vapor required for the corrosion is calculated from the area of the corrosion area candidate that is not regarded as a surface foreign material by the surface foreign material discrimination means 5, and the water vapor permeability of the water vapor barrier film is obtained.

図２は表面異物判別手段５の判別原理の説明図である。水蒸気バリアフィルム６の片面の一部にカルシウム層７を成膜し、カルシウム層７のうち水蒸気バリアフィルム６に接していない裏面側を封止層８で覆う。カルシウム腐食法では試験片を恒温恒湿処理し、水蒸気バリアフィルムを透過した水蒸気により腐食したカルシウムの量を算出することにより水蒸気の透過量を測定する。カルシウム層７の腐食状態を光学的に観測するために、水蒸気バリアフィルム６は透明である必要がある。封止層８には金属、ガラス、樹脂などを複数組み合わせて使用することが好ましい。   FIG. 2 is an explanatory diagram of the discrimination principle of the surface foreign matter discrimination means 5. A calcium layer 7 is formed on a part of one side of the water vapor barrier film 6, and the back side of the calcium layer 7 that is not in contact with the water vapor barrier film 6 is covered with the sealing layer 8. In the calcium corrosion method, a test piece is subjected to constant temperature and humidity treatment, and the amount of calcium corroded by water vapor that has permeated through the water vapor barrier film is calculated to measure the amount of water vapor permeated. In order to optically observe the corrosion state of the calcium layer 7, the water vapor barrier film 6 needs to be transparent. The sealing layer 8 is preferably used in combination of a plurality of metals, glasses, resins and the like.

カルシウム層７の表面は光沢を持つため、試験片１に照明光を当てたときの正反射光の強度は大きい。しかしながら、カルシウム層７に腐食９が存在した場合、照明光は散乱、吸収され、腐食からの正反射光１０の強度は小さくなる。そのため、試験片１を撮影手段３で撮影したとき、腐食がないカルシウム層７に比べて腐食９は暗い像となる。水蒸気バリアフィルム６の表面に付着した表面異物１１についても、腐食９と同様の理由で周辺に比べて暗い像となる。さらに、表面異物１１の場合、表面異物からの正反射光１２による像に加えて、表面異物の影１３がカルシウム層７の表面で反射して現れる。つまり、撮影手段３の撮影画像において、表面異物１１は像が二重に現れることになる。   Since the surface of the calcium layer 7 is glossy, the intensity of the regular reflection light when the illumination light is applied to the test piece 1 is large. However, when the corrosion 9 exists in the calcium layer 7, the illumination light is scattered and absorbed, and the intensity of the regular reflection light 10 from the corrosion is reduced. Therefore, when the test piece 1 is photographed by the photographing means 3, the corrosion 9 becomes a darker image than the calcium layer 7 without corrosion. The surface foreign matter 11 attached to the surface of the water vapor barrier film 6 also becomes a dark image compared to the surroundings for the same reason as the corrosion 9. Further, in the case of the surface foreign matter 11, the shadow 13 of the surface foreign matter appears on the surface of the calcium layer 7 in addition to the image by the regular reflection light 12 from the surface foreign matter. That is, in the photographed image of the photographing means 3, the surface foreign matter 11 has a double image.

腐食領域候補抽出手段４は、撮影手段３で撮影した試験片１の画像から腐食領域候補を抽出する。画像中で腐食が生じていないカルシウム層７は明るく、腐食９や表面異物１１は暗い像となる。従って、適切な閾値による二値化画像処理により腐食領域候補が抽出可能である。抽出後はそれぞれの腐食領域候補について位置、面積、長さや周囲長など幾何学的な特徴を算出する。これら腐食領域候補抽出手段４の処理は専用のハードウェアで構成してもよく、コンピュータでソフトウェア的に実現しても良い。   The corrosion area candidate extraction unit 4 extracts a corrosion area candidate from the image of the test piece 1 photographed by the photographing unit 3. The calcium layer 7 in which no corrosion has occurred in the image is bright, and the corrosion 9 and the surface foreign matter 11 are dark images. Therefore, corrosion area candidates can be extracted by binarized image processing with an appropriate threshold. After extraction, geometric features such as position, area, length and perimeter are calculated for each corrosion area candidate. The processing of the corrosion area candidate extraction means 4 may be configured by dedicated hardware, or may be realized by software using a computer.

表面異物からの正反射光１２と、表面異物の影１３の反射ずれ１５は、照明手段２からの照明の入射角１４をΘ、水蒸気バリアフィルムの屈折率をｍ、水蒸気バリアフィルムの厚みをｔとすると、数式１より算出することが出来る。

Figure 0004561415
Reflection deviation 15 of the specular reflection light 12 from the surface foreign matter and the shadow 13 of the surface foreign matter is Θ, the incident angle 14 of illumination from the illumination means 2 is Θ, the refractive index of the water vapor barrier film is m, and the thickness of the water vapor barrier film is t. Then, it can be calculated from Equation 1.
Figure 0004561415

表面異物判別手段５は、腐食領域候補抽出手段４で抽出された各腐食領域候補について、式１で算出される反射ずれ量だけずれた位置に腐食領域候補が存在するかどうかを検索する。腐食領域候補が見つかった場合、両者の幾何学的特徴を比較し、その類似性が高いときには、見つかった腐食領域候補は表面異物１１の影であると判断し、見つかった腐食領域候補と検索の元となった腐食領域候補を共に腐食領域候補から除外する。つまり、表面異物判別手段５は、画像中で式１より計算される反射ずれ量だけずれて二重に映っている像は、腐食ではなく表面異物によるものとして判別する。これら表面異物判別手段５の処理は専用のハードウェアで構成してもよく、コンピュータでソフトウェア的に実現しても良い。   The surface foreign matter discriminating means 5 searches each corrosion area candidate extracted by the corrosion area candidate extracting means 4 for whether or not there is a corrosion area candidate at a position shifted by the reflection deviation amount calculated by Equation 1. When a corrosion area candidate is found, the geometric characteristics of the two are compared, and if the similarity is high, it is determined that the found corrosion area candidate is a shadow of the surface foreign matter 11, and the detected corrosion area candidate and the search Both of the original corrosion area candidates are excluded from the corrosion area candidates. In other words, the surface foreign matter discriminating means 5 discriminates that the image reflected by the amount of reflection deviation calculated from the equation 1 in the image is reflected by the surface foreign matter instead of corrosion. The processing of these surface foreign matter discriminating means 5 may be constituted by dedicated hardware, or may be realized by software with a computer.

表面異物判別手段５で表面異物の影響を取り除いた後は、通常のカルシウム腐食法による水蒸気透過度測定装置と同じく、試験片のカルシウム腐食面積から水蒸気バリアフィルムを透過した水蒸気量を算出することにより、水蒸気バリアフィルムの水蒸気透過度を算出する。   After removing the influence of the surface foreign matter by the surface foreign matter discriminating means 5, the amount of water vapor permeated through the water vapor barrier film is calculated from the calcium corrosion area of the test piece as in the case of the water vapor permeability measuring device by the normal calcium corrosion method. The water vapor permeability of the water vapor barrier film is calculated.

本発明により、カルシウム腐食法による水蒸気透過度測定装置において、試験片の表面に付着したほこり等の異物をカルシウム腐食と誤判定することを抑制することが可能となるため、精度の高い水蒸気透過度測定が可能となる。   According to the present invention, in the water vapor permeability measuring device by the calcium corrosion method, it is possible to suppress erroneous determination of foreign matters such as dust adhering to the surface of the test piece as calcium corrosion. Measurement is possible.

本発明の水蒸気透過度測定装置の構成図である。It is a block diagram of the water-vapor-permeation measuring apparatus of this invention. 表面異物判別手段の判別原理の説明図である。It is explanatory drawing of the discrimination principle of a surface foreign material discrimination means.

符号の説明Explanation of symbols

１ 試験片
２ 照明手段
３ 撮影手段
４ 腐食領域候補抽出手段
５ 表面異物判別手段
６ 水蒸気バリアフィルム
７ カルシウム層
８ 封止層
９ 腐食
１０ 腐食からの正反射光
１１ 表面異物
１２ 表面異物からの正反射光
１３ 表面異物の影
１４ 照明光の入射角
１５ 反射ずれ

DESCRIPTION OF SYMBOLS 1 Test piece 2 Illumination means 3 Imaging means 4 Corrosion area candidate extraction means 5 Surface foreign matter discrimination means 6 Water vapor barrier film 7 Calcium layer 8 Sealing layer 9 Corrosion 10 Regular reflection light from corrosion 11 Surface foreign matter 12 Regular reflection from surface foreign matter Light 13 Shadow of surface foreign matter 14 Incident angle of illumination light 15 Reflection deviation

Claims (2)

カルシウム腐食法による試験片の水蒸気透過度測定装置であって、
試験片表面側の一方側斜め上方から所定の角度で照明光を照射する照明手段と、試験片表面側の他方側斜め上方で試験片からの反射光を撮影する撮影手段と、撮影手段から得られる画像から腐食領域候補を抽出する腐食領域候補抽出手段と、抽出された腐食領域候補から試験片表面異物を判別する表面異物判別手段とを備え、
前記表面異物判別手段が、特定の腐食領域候補に対して所定の方向に下記式（１）で算出される反射ずれ量だけずれた位置に他の腐食領域候補が存在するか検索し、両者の画像の幾何学的特徴が類似する場合に腐食領域候補を試験片表面異物と判別する処理機能を有することを特徴とする水蒸気透過度測定装置。
Figure 0004561415
 A device for measuring water vapor permeability of a test piece by a calcium corrosion method,
Obtained from illumination means for irradiating illumination light at a predetermined angle from one side obliquely above the test piece surface side, photographing means for photographing reflected light from the test piece obliquely above the other side of the test piece surface side, and photographing means A corrosion area candidate extraction means for extracting a corrosion area candidate from the extracted image, and a surface foreign matter discrimination means for discriminating a test piece surface foreign substance from the extracted corrosion area candidate,
The surface foreign matter discriminating means searches whether there is another corrosion area candidate at a position shifted by a reflection deviation amount calculated by the following equation (1) in a predetermined direction with respect to a specific corrosion area candidate. A water vapor transmission rate measuring apparatus having a processing function of discriminating a corrosion area candidate from a test piece surface foreign substance when geometrical features of images are similar.
Figure 0004561415
 カルシウム腐食法による試験片の水蒸気透過度測定方法であって、
試験片表面側の一方側斜め上方から所定の角度で照明光を照射し、試験片表面側の他方側斜め上方で試験片からの反射光を撮影し、得られた画像から腐食領域候補を抽出し、抽出された特定の腐食領域候補に対して所定の方向に下記式（１）で算出される反射ずれ量だけずれた位置に他の腐食領域候補が存在するか検索し、両者の画像の幾何学的特徴が類似する場合に腐食領域候補を試験片表面異物と判別することを特徴とする水蒸気透過度測定方法。
Figure 0004561415
 A method for measuring water vapor permeability of a test piece by a calcium corrosion method,
Irradiate illumination light at a predetermined angle from one side obliquely above the specimen surface side, photograph the reflected light from the specimen diagonally above the other side of the specimen surface side, and extract corrosion area candidates from the obtained image Then, it is searched whether there is another corrosion area candidate at a position shifted by the reflection deviation amount calculated by the following formula (1) in a predetermined direction with respect to the extracted specific corrosion area candidate. A method for measuring a water vapor transmission rate, characterized in that when a geometric feature is similar, a corrosion area candidate is discriminated as a foreign matter on the surface of a test piece.
Figure 0004561415
JP2005069797A 2005-03-11 2005-03-11 Water vapor permeability measuring apparatus and water vapor permeability measuring method Expired - Fee Related JP4561415B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005069797A JP4561415B2 (en) 2005-03-11 2005-03-11 Water vapor permeability measuring apparatus and water vapor permeability measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005069797A JP4561415B2 (en) 2005-03-11 2005-03-11 Water vapor permeability measuring apparatus and water vapor permeability measuring method

Publications (2)

Publication Number Publication Date
JP2006250816A JP2006250816A (en) 2006-09-21
JP4561415B2 true JP4561415B2 (en) 2010-10-13

Family

ID=37091479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005069797A Expired - Fee Related JP4561415B2 (en) 2005-03-11 2005-03-11 Water vapor permeability measuring apparatus and water vapor permeability measuring method

Country Status (1)

Country Link
JP (1) JP4561415B2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2009041632A1 (en) * 2007-09-28 2011-01-27 株式会社アルバック Apparatus and method for measuring water vapor permeability
JP5359575B2 (en) * 2009-06-09 2013-12-04 東洋製罐株式会社 Water vapor barrier property evaluation unit and water vapor barrier property evaluation method
JP2012000812A (en) 2010-06-15 2012-01-05 Daicel Corp Laminated film, method for producing the same and electronic device
JP5810556B2 (en) * 2011-03-09 2015-11-11 凸版印刷株式会社 Gas permeability test piece and gas permeability evaluation method
KR101409218B1 (en) 2012-02-27 2014-06-19 엘아이지에이디피 주식회사 Inspection apparatus and inspection method of attached substrate
JP6299751B2 (en) * 2013-04-02 2018-03-28 コニカミノルタ株式会社 Method and system for evaluating water vapor permeability of gas barrier film and method for producing gas barrier film
JP6446683B2 (en) * 2015-03-05 2019-01-09 埼玉県 Water vapor permeability measuring device and water vapor permeability measuring method of sample

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09258197A (en) * 1996-03-18 1997-10-03 Hitachi Electron Eng Co Ltd Method for discriminating front and rear defects of glass substrate
JP2004233338A (en) * 2003-01-08 2004-08-19 Tdk Corp Defect detection method of disc substrate, apparatus for the same, and method for manufacturing substrate for optical disc
JP2004333127A (en) * 2002-04-05 2004-11-25 Sumitomo Bakelite Co Ltd Cell for evaluating vapor barrier property, and method for evaluating vapor barrier property

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09258197A (en) * 1996-03-18 1997-10-03 Hitachi Electron Eng Co Ltd Method for discriminating front and rear defects of glass substrate
JP2004333127A (en) * 2002-04-05 2004-11-25 Sumitomo Bakelite Co Ltd Cell for evaluating vapor barrier property, and method for evaluating vapor barrier property
JP2004233338A (en) * 2003-01-08 2004-08-19 Tdk Corp Defect detection method of disc substrate, apparatus for the same, and method for manufacturing substrate for optical disc

Also Published As

Publication number Publication date
JP2006250816A (en) 2006-09-21

Similar Documents

Publication Publication Date Title
JP4561415B2 (en) Water vapor permeability measuring apparatus and water vapor permeability measuring method
US10379027B2 (en) Method for identifying blood particles using a photodetector
CN104094104A (en) Device and method for identifying defects within the volume of a transparent pane and use of the device
JP2009291415A5 (en)
KR101702841B1 (en) Method for monitoring defect in polaroid films
RU2537805C2 (en) Method and device for checking valuable documents
JP4407466B2 (en) Water vapor permeability measurement method by calcium corrosion method
JP2005189113A (en) Surface inspecting device and surface inspection method
JP2018204956A (en) Coating-film blistering width measuring apparatus for coated metal plate and method for measuring coating-film blistering width of coated metal plate
CA2902244C (en) Apparatus and method for checking value documents, in particular bank notes, and value-document processing system
JP2020518045A5 (en)
KR102308974B1 (en) Dangerous substance detecting system and method and computer program based visual information
US11959850B2 (en) Evaluation system and method for evaluating vulcanized rubber material deterioration by ozone
JP2015210151A (en) Method and device for detecting surface defect
KR20170075101A (en) Apparatus and method for steel sheet inspection
Kiltz et al. Revised benchmarking of contact-less fingerprint scanners for forensic fingerprint detection: challenges and results for chromatic white light scanners (CWL)
US20060238751A1 (en) Method of detecting an edge bead removal line on a wafer
JP4783590B2 (en) Glossy cylindrical surface inspection device
CN109781751A (en) Buried cable pulsed X-ray digital imaging detection device for detecting and characterization processes
Zhu et al. Automatic Surface Defect Inspection System Using Convolutional Neural Networks
WO2018207265A1 (en) Tire degradation evaluation system, and method and program thereof
Amorim et al. Evaluation of Edge Detection Filters Applied to Corroded Steel Sheets
JP2001235424A (en) Surface inspection device
CN117710369B (en) Metal aluminum phosphate film defect detection method and system based on computer vision technology
JPH07306161A (en) Method for detecting segregation of metallic material

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071107

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100215

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100323

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100426

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100525

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100615

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100706

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100719

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130806

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130806

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140806

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees