JP2003215080A - Test method for evaluating water or moisture absorbing property of material and method of detecting water or moisture absorption distribution of material - Google Patents
Test method for evaluating water or moisture absorbing property of material and method of detecting water or moisture absorption distribution of materialInfo
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- JP2003215080A JP2003215080A JP2002013847A JP2002013847A JP2003215080A JP 2003215080 A JP2003215080 A JP 2003215080A JP 2002013847 A JP2002013847 A JP 2002013847A JP 2002013847 A JP2002013847 A JP 2002013847A JP 2003215080 A JP2003215080 A JP 2003215080A
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- substance
- water
- temperature
- water absorption
- moisture absorption
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、物質の吸水性や吸
湿性を評価するための試験法及び吸水分布又は吸湿分布
の検出方法に関する。TECHNICAL FIELD The present invention relates to a test method for evaluating water absorption and hygroscopicity of a substance and a method for detecting water absorption distribution or moisture absorption distribution.
【０００２】[0002]
【従来の技術】電子機器に使用されるプリント配線基板
には、主として銅張積層板が使用される。銅張積層板と
は、フェノール樹脂やエポキシ樹脂等の樹脂材料を含浸
した紙やガラス布等の基材を数牧重ねた絶縁層の片面又
は両面に銅箔をのせ、これを一定時間加圧、加熱して積
層したものである。前記絶縁層を構成する物質の種類に
よって、その吸水性や熱膨張係数などの特性が異なり、
吸水率の大きい物質ほど絶縁層の耐絶縁性が悪くなる。2. Description of the Related Art Copper-clad laminates are mainly used for printed wiring boards used in electronic equipment. A copper clad laminate is a copper foil placed on one or both sides of an insulating layer that is made by stacking several base materials such as paper or glass cloth impregnated with a resin material such as phenol resin or epoxy resin, and presses this for a certain period of time. , Which are laminated by heating. Properties such as water absorption and thermal expansion coefficient differ depending on the type of substance forming the insulating layer,
A material having a higher water absorption rate has a lower insulation resistance of the insulating layer.
【０００３】銅張積層板の絶縁層の吸水性を評価する方
法として、ＪＩＳ、ＭＩＬ及びＩＰＣ等の規格において
は給水率試験法が定められている。これらの試験は、乾
燥した試験片を常温の水中（２３℃）に２４時間浸漬さ
せて、浸漬前と浸漬後で前記試験片の重量を測定し、前
記試験片の吸水率を算出することによって、吸水性を判
定する試験である。下記表１にＪＩＳ、ＭＩＬ及びＩＰ
Ｃの各規格による吸水率試験条件を示す。As a method for evaluating the water absorption of the insulating layer of the copper clad laminate, the water supply rate test method is defined in the standards such as JIS, MIL and IPC. In these tests, the dried test piece was immersed in normal temperature water (23 ° C.) for 24 hours, the weight of the test piece was measured before and after the immersion, and the water absorption rate of the test piece was calculated. A test for determining water absorption. JIS, MIL and IP are shown in Table 1 below.
The water absorption test conditions according to each standard of C are shown.
【０００４】[0004]
【表１】 [Table 1]
【０００５】ここで、表１における処理欄の記号Ｄ、Ｅ
は、各々恒温水中浸漬処理、恒温気中放置処理を意味
し、後に続くスラッシュ記号の前の数値が処理時間、ス
ラッシュ記号の後の数値が処理温度を示している。Here, the symbols D and E in the processing column in Table 1
Means a dipping treatment in constant temperature water and a standing treatment in constant temperature air, respectively, and the numerical value before the slash mark which follows is the processing time, and the numerical value after the slash symbol is the processing temperature.
【０００６】また他の試験法として、圧力容器を利用し
たＨＡＳＴ（Ｈｉｇｈｌｙ Ａｃｃｅｌｅｒａｔｅｄ
Ｔｅｍｐｅｒａｔｕｒｅ＆Ｈｕｍｉｄｉｔｙ Ｓｔｒｅ
ｓｓＴｅｓｔ）試験等が行われることがある。ＨＡＳＴ
試験は、高い圧力環境下（例えば、１３３℃／１００％
ＲＨ（３気圧［絶対圧］）や、１３０℃／８５％ＲＨ
（２．３４気圧［絶対圧］）等）に物質を一定時間放置
することによって、前記物質に水分を強制的に押し込ん
で吸湿状態にさせる試験である。したがって、ＨＡＳＴ
試験によって物質を吸湿状態にする前、及び後の重量を
測定し、前記物質の重量変化から算出された吸湿率を基
に前記物質の吸湿性の判定を行っている。As another test method, HAST (Highly Accelerated) using a pressure vessel is used.
Temperature & Humidity Str
An ssTest) test may be performed. HAST
The test is conducted under a high pressure environment (for example, 133 ° C./100%
RH (3 atm [absolute pressure]) or 130 ° C / 85% RH
(2.34 atm [absolute pressure], etc.) is a test in which a substance is allowed to stand for a certain period of time to forcibly push moisture into the substance to bring it into a moisture absorption state. Therefore, HAST
The weight of the substance is measured before and after the substance is made into a hygroscopic state by the test, and the hygroscopicity of the substance is determined based on the moisture absorption rate calculated from the weight change of the substance.
【０００７】また、銅張積層板の吸湿（吸水）性を評価
するための試験法ではないが、紙や布等の吸湿（吸水）
率を調べる方法として、特開平６−１１８０２７号公報
や特開平６−１２９９９９号公報に開示された方法が挙
げられる。これら公報による方法は、物質にマイクロ波
を照射して、照射したマイクロ波の透過率や反射率を算
出することによって、前記物質の吸水（吸水）率を測定
するものである。Although it is not a test method for evaluating the moisture absorption (water absorption) of a copper clad laminate, it does not absorb moisture (water absorption) of paper or cloth.
Examples of methods for examining the rate include the methods disclosed in JP-A-6-118027 and JP-A-6-129999. The methods according to these publications measure the water absorption rate of a substance by irradiating the substance with microwaves and calculating the transmittance and reflectance of the irradiated microwaves.
【０００８】なお、上記に「吸水」、「吸湿」という用
語が記載されているが、「吸水」とは物質を液体の水又
は湯に一定時間浸漬放置したときに前記物質が水分を吸
収することをいい、「吸湿」とは物質を気体の水（水蒸
気）の雰囲気に一定時間放置したときに前記物質が水分
を吸収することをいう。Although the terms "water absorption" and "moisture absorption" are described above, "water absorption" means that when a substance is immersed in liquid water or hot water for a certain period of time, the substance absorbs water. The term "moisture absorption" means that the substance absorbs moisture when the substance is left in an atmosphere of gaseous water (steam) for a certain period of time.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上述し
た吸水率試験法の場合、ガラスエポキシ基板やＢＴレジ
ン基板等の吸水率の低い絶縁物質で構成された銅張積層
板の試験では、吸水率が低いために浸漬前、浸漬後の重
量差が生じにくく、表１に示すような規格試験を適用し
ても所望の測定結果を得らないことがある。However, in the case of the above-mentioned water absorption rate test method, in the test of the copper clad laminate made of an insulating material having a low water absorption rate such as a glass epoxy substrate or a BT resin substrate, the water absorption rate is Since it is low, a difference in weight before and after immersion is unlikely to occur, and the desired measurement result may not be obtained even if the standard test shown in Table 1 is applied.
【００１０】また、ＨＡＳＴ試験を用いて、物質の重量
変化を捉えることによって物質の吸湿性を判定する方法
には、次のような問題がある。Further, the method of determining the hygroscopicity of a substance by detecting the weight change of the substance using the HAST test has the following problems.
【００１１】ＨＡＳＴ試験で使用する圧力容器は、その
内部を高い温度かつ高い相対湿度に設定することで、高
い圧力環境を作り出している。このような環境下に物質
が放置されると、物質の種類によっては、高い温度の影
響によってその成分の一部が溶解し、さらに高い圧力の
影響によって溶解した成分の全部若しくは一部が物質外
部へ溶出してしまうことがある。The pressure vessel used in the HAST test creates a high pressure environment by setting its inside to a high temperature and a high relative humidity. When a substance is left in such an environment, depending on the type of substance, some of its components may dissolve due to the effects of high temperature, and all or some of the dissolved components may be exposed to the outside of the substance due to the effects of higher pressure. May be eluted.
【００１２】物質の成分の一部が物質外部へ溶出した場
合には、図４に示す圧力と重量との関係を示すグラフか
ら明らかなように、高い圧力領域で物質の重量が減少し
てしまうことがある。そのため、物質の重量を測定して
も、測定した重量からは正確な吸湿重量を把握すること
ができず、その結果、物質の吸湿性を判定することがで
きなくなったり、誤った判定を下してしまう惧れがあっ
た。When a part of the components of the substance is eluted to the outside of the substance, the weight of the substance decreases in the high pressure region, as is apparent from the graph showing the relationship between pressure and weight shown in FIG. Sometimes. Therefore, even if the weight of the substance is measured, it is not possible to accurately grasp the hygroscopic weight from the measured weight, and as a result, it becomes impossible to determine the hygroscopicity of the substance, or an erroneous determination is made. There was a fear of being lost.
【００１３】また上記従来技術によるマイクロ波照射に
よる方法では、物質が吸湿（吸水）する前後の重量変化
を捉えたり、マイクロ波の透過率や反射率を捉えたりし
て、前記物質の吸湿（吸水）率を算出している。しかし
ながら、算出された吸湿（吸水）率からは、物質全体に
含まれる水分の程度を把握することはできるが、物質に
吸湿（吸水）された水分がどのように分布しているかま
では知ることができない。そのため、例えば、次のよう
な問題が発生することが危惧されている。In the method by microwave irradiation according to the above-mentioned prior art, the weight change before and after moisture absorption (water absorption) of a substance is detected, and the transmittance and reflectance of microwaves are detected to absorb moisture (water absorption) of the substance. ) Calculates the rate. However, from the calculated moisture absorption (water absorption) rate, it is possible to grasp the degree of water contained in the whole substance, but to know how moisture absorbed (water absorbed) in the substance is distributed. I can't. Therefore, for example, it is feared that the following problems will occur.
【００１４】即ち、銅張積層板の絶縁層内部の一部分に
空隙が存在する、銅張積層板を構成するガラスクロスと
樹脂との癒着性や接着性が悪い箇所、若しくは樹脂の硬
化が不十分な部分が存在する、等のような欠陥が存在す
ると、前記錮張積層板の欠陥部分は多湿環境下において
水分が吸湿しやすくなる。That is, there is a void in a part of the inside of the insulating layer of the copper-clad laminate, where adhesion or adhesion between the resin and the glass cloth constituting the copper-clad laminate is poor, or the curing of the resin is insufficient. If there is a defect such as the presence of such a portion, the defective portion of the tension laminated plate is likely to absorb moisture in a humid environment.
【００１５】このような銅張積層板によって電子回路が
形成され、しかも前記欠陥部分が電子回路の電極間に存
在した場合には、多湿環境下での動作時において前記欠
陥部分が吸湿することにより電極間でイオンマイグレー
ション等による絶縁低下を招く惧れがある。When an electronic circuit is formed by such a copper clad laminate and the defective portion exists between the electrodes of the electronic circuit, the defective portion absorbs moisture during operation in a humid environment. There is a risk of causing insulation deterioration between the electrodes due to ion migration or the like.
【００１６】このように、銅張積層板の内部に欠陥等の
吸湿しやすい部分が存在することは、電子回路に不具合
をもたらす。このような不具合を未然に防止すること
は、電子回路の絶縁信頼性を確保する上で重要であり、
そのためにも、吸湿しやすい部分を特定できる技術が必
要となる。しかし、従来による方法では吸湿（吸水）し
やすい部分を特定することは困難である。As described above, the presence of a portion such as a defect that easily absorbs moisture inside the copper clad laminate causes a problem in the electronic circuit. It is important to prevent such problems before they occur, in order to ensure the insulation reliability of electronic circuits.
For that reason, a technique capable of identifying a portion that easily absorbs moisture is required. However, it is difficult to identify a part that easily absorbs moisture (water absorption) by the conventional method.
【００１７】本発明は上記事情の鑑みてなされたもので
あり、例え高い温度と高い圧力の影響によって物質中の
成分の一部が溶出してしまったとしても、正確に物質の
吸水性や吸湿性を判定できる物質の吸水性又は吸湿性を
評価する試験法を提供すること、及び、物質の吸水分布
や吸湿分布を可視化して検出でき、吸水（吸湿）しやす
い部分を特定し得る物質の吸水分布又は吸湿分布の検出
方法を提供することを目的とするものである。The present invention has been made in view of the above circumstances, and even if a part of the components in the substance is eluted due to the influence of high temperature and high pressure, the water absorption and moisture absorption of the substance can be accurately performed. To provide a test method to evaluate the water absorption or hygroscopicity of a substance whose property can be determined, and to visualize the water absorption distribution or moisture absorption distribution of the substance and detect it, and to identify the part that can easily absorb water (moisture absorption) It is an object of the present invention to provide a method for detecting water absorption distribution or moisture absorption distribution.
【００１８】[0018]
【課題を解決するための手段】請求項１記載の発明は、
物質を吸水処理又は吸湿処理することによって前記物質
の吸水性又は吸湿性を判定する評価法において、物質を
吸水処理又は吸湿処理する前に、前記物質に水の固有振
動数と同じ振動数をもつマイクロ波を一定時間照射し、
前記マイクロ波を照射中又は照射直後に前記物質の温度
を測定し、前記物質を吸水処理又は吸湿処理した後に、
前記物質に水の固有振動数と同じ振動数を持つマイクロ
波を一定時間照射し、前記マイクロ波を照射中又は照射
直後に前記物質の温度を測定し、吸水処理又は吸湿処理
を施す前に測定した物質の温度と、吸水処理又は吸湿処
理を施した後に測定した前記物質の温度との変化量又は
変化率から前記物質の吸水性又は吸湿性を判定すること
を特徴とするものである。The invention according to claim 1 is
In an evaluation method for determining the water absorption or hygroscopicity of a substance by subjecting the substance to water absorption or moisture absorption treatment, the substance has the same natural frequency as water before water absorption treatment or moisture absorption treatment. Irradiate with microwave for a certain time,
During or immediately after the irradiation of the microwave, the temperature of the substance is measured, and after the water absorption treatment or the moisture absorption treatment of the substance,
The substance is irradiated with a microwave having the same frequency as the natural frequency of water for a certain period of time, the temperature of the substance is measured during or immediately after the irradiation of the microwave, and measured before water absorption treatment or moisture absorption treatment. The water absorption or hygroscopicity of the substance is determined from the amount of change or the rate of change between the temperature of the substance and the temperature of the substance measured after the water absorption treatment or the moisture absorption treatment.
【００１９】請求項２の発明は、物質を吸水処理又は吸
湿処理することによって前記物質の吸水性又は吸湿性を
判定する物質の吸水性又は吸湿性を評価する試験法にお
いて、物質を吸水処理又は吸湿処理した後に、前記物質
に水の固有振動数と同じ振動数をもつマイクロ波を一定
時間照射し、前記マイクロ波を照射中又は照射直後に前
記物質の温度を測定し、吸水処理又は吸湿処理を施した
後に測定した物質の温度から前記物質の吸水性又は吸湿
性を判定することを特徴とするものである。The invention of claim 2 is a test method for evaluating the water absorption or hygroscopicity of a substance for determining the water absorption or hygroscopicity of the substance by subjecting the substance to water absorption or hygroscopicity treatment. After the moisture absorption treatment, the substance is irradiated with a microwave having the same frequency as the natural frequency of water for a certain period of time, and the temperature of the substance is measured during or immediately after the irradiation of the microwave to perform a water absorption treatment or a moisture absorption treatment. The water absorption or hygroscopicity of the substance is determined from the temperature of the substance measured after the treatment.
【００２０】請求項１、２記載の発明は、水分子の固有
振動数と同じ振動数のマイクロ波（２．４５ＧＨｚ）を
物資に照射すると、前記物質に水分が含まれる場合、含
まれる水の分子と分子とが振動でぶつかりあって摩擦熱
が生じ、前記物質が発熱するという現象に基づいて、マ
イクロ波を照射中又は照射直後に物質の温度を測定し、
温度の変化量や変化率、又は温度差から物質の吸水性や
吸湿性を判定しようとするものである。When the material is irradiated with microwaves (2.45 GHz) having the same frequency as the natural frequency of the water molecule, when the substance contains water, the water contained in the substance is contained. Molecules and molecules collide due to vibration and frictional heat is generated, and based on the phenomenon that the substance heats up, the temperature of the substance is measured during or immediately after irradiation with microwaves,
The water absorption or hygroscopicity of a substance is determined from the amount of change in temperature, the rate of change, or the temperature difference.
【００２１】即ち、上述した請求項１の発明では、物質
に吸水処理又は吸湿処理を施す前に、前記物質に対して
水の固有振動数と同じ振動数をもつマイクロ波を一定時
間照射する。このとき、前記物質中に含まれる水分量は
少ないので、水分子の振動による前記物質からの発熱は
小さく、その結果、前記物質の温度は高くならない。温
度測定後、前記物質に吸水処理又は吸湿処理を施すと、
前記物質内部に水分が入り込む。吸水処理又は吸湿処理
が完了した後に、前記物質に対して再び水の固有振動数
と同じ振動数をもつマイクロ波を一定時間照射すると、
前記物質中には吸水処理又は吸湿処理を施す前よりも多
くの水分が入り込んでいるため、水分子の振動が活発と
なり前記物質から発熱が起こる。そのため、前記マイク
ロ波を照射中又は照射直後に前記物質の温度を測定する
と、吸水処理又は吸湿処理を施す前に測定した温度より
も高くなる。そして、吸水処理又は吸湿処理を施す前に
測定した物質の温度と、吸水処理又は吸湿処理を施した
後に測定した前記物質の温度との温度変化量や温度変化
率から、前記物質の吸水性又は吸湿性を判定することが
できる。That is, in the above-mentioned invention of claim 1, before the substance is subjected to the water absorption treatment or the moisture absorption treatment, the substance is irradiated with the microwave having the same frequency as the natural frequency of water for a certain period of time. At this time, since the amount of water contained in the substance is small, heat generation from the substance due to vibration of water molecules is small, and as a result, the temperature of the substance does not rise. After the temperature measurement, if the substance is subjected to water absorption treatment or moisture absorption treatment,
Moisture enters inside the substance. After the water absorption treatment or the moisture absorption treatment is completed, when the material is again irradiated with microwaves having the same natural frequency as that of water for a certain period of time,
Since more water enters the substance than before the water absorption treatment or the moisture absorption treatment, vibration of water molecules is activated and heat is generated from the substance. Therefore, when the temperature of the substance is measured during or immediately after the microwave irradiation, the temperature becomes higher than the temperature measured before the water absorption treatment or the moisture absorption treatment. Then, the temperature of the substance measured before performing the water absorption treatment or the moisture absorption treatment, and the temperature change amount or the temperature change rate between the temperature of the substance measured after performing the water absorption treatment or the moisture absorption treatment, the water absorption of the substance or Hygroscopicity can be determined.
【００２２】ここで、吸水処理とは、物質を液体の水又
は湯に一定時間浸漬放置して、前記物質に水分を吸収さ
せることをいい、吸湿処理とは、物質を気体の水（水蒸
気）の雰囲気に一定時間放置して、前記物質に水分を吸
収させることをいう。Here, the water absorption treatment means that the substance is immersed in liquid water or hot water for a certain period of time so as to allow the substance to absorb water, and the moisture absorption treatment means the substance is gas water (steam). It is allowed to stand for a certain period of time in the atmosphere to allow the substance to absorb water.
【００２３】請求項２記載の発明では、物質に吸水処理
又は吸湿処理を施すと、前記物質内部に水分が入り込
む。吸水処理又は吸湿処理が完了した後に、前記物質に
対して水の固有振動数と同じ振動数をもつマイクロ波を
一定時間照射すると、前記物質中には吸水処理又は吸湿
処理を施す前よりも多くの水分が入り込んでいるため、
水分子の振動が活発になり前記物質から発熱が起こる。
そのため、前記マイクロ波を照射中又は照射直後に前記
物質の温度を測定すると、吸水処理又は吸湿処理を施し
た後に測定した前記物質の温度は上昇する。そして、こ
の上昇した温度から前記物質の吸水性又は吸湿性を判定
することができる。According to the second aspect of the present invention, when the substance is subjected to the water absorption treatment or the moisture absorption treatment, water enters the inside of the substance. After the water absorption treatment or the moisture absorption treatment is completed, when the substance is irradiated with a microwave having the same frequency as the natural frequency of water for a certain period of time, the amount of the substance is larger than that before the water absorption treatment or the moisture absorption treatment. Since the water of
The vibration of water molecules becomes active and heat is generated from the substance.
Therefore, if the temperature of the substance is measured during or immediately after the microwave irradiation, the temperature of the substance measured after the water absorption treatment or the moisture absorption treatment rises. Then, the water absorption or hygroscopicity of the substance can be determined from the increased temperature.
【００２４】請求項３記載の発明の物質の吸水分布又は
吸湿分布の検出方法は、物質に水の固有振動数と同じ振
動数をもつマイクロ波を一定時間照射し、前記マイクロ
波を照射中又は照射後に、前記物質の温度分布を温度分
布測定表示手段を用いて測定し、前記物質の吸水分布又
は吸湿分布を目視可能な状態に表示することを特徴とす
るものである。According to a third aspect of the present invention, there is provided a method for detecting a water absorption distribution or a moisture absorption distribution of a substance, wherein the substance is irradiated with a microwave having the same frequency as the natural frequency of water for a certain period of time, or while the microwave is being irradiated. After the irradiation, the temperature distribution of the substance is measured using a temperature distribution measurement display means, and the water absorption distribution or the moisture absorption distribution of the substance is displayed in a visually observable state.
【００２５】請求項３記載の発明においては、水分子の
固有振動数と同じ振動数のマイクロ波を物質に照射する
と、前記物質に水分が含まれる場合、含まれる水の分子
と分子とが振動でぶつかりあって摩擦熱が生じ、前記物
質が発熱するという現象に基づいて、マイクロ波を照射
中又は照射後に物質の温度分布を測定し、前記温度分布
の状態から物質の吸水分布や吸湿分布を検出しようとす
るものである。In a third aspect of the present invention, when a substance is irradiated with microwaves having the same frequency as the natural frequency of water molecules, when the substance contains water, the contained water molecules and molecules vibrate. Based on the phenomenon that frictional heat is generated due to collision with each other, and the substance heats up, the temperature distribution of the substance is measured during or after irradiation with microwaves, and the water absorption distribution or the moisture absorption distribution of the substance is determined from the state of the temperature distribution. It is what you are trying to detect.
【００２６】即ち、物質に対して水の固有振動数と同じ
振動数をもつマイクロ波を一定時間照射すると、前記物
質中に水分が含まれている場合、水分子の振動が活発と
なり、水分子同士の摩擦熱による発熱現象により前記物
質の温度が上昇する。特に、水分が多い部分ではこの発
熱現象が活発となり、水分が多い部分ほど温度上昇は大
きくなる。このような物質の温度を温度分布測定表示手
段を用いて測定し表示することによって、前記物質の温
度分布を視認することができる。そして、この表示され
た温度分布の状態から、水分が多く含まれる部分を特定
することができる。具体的には、温度上昇が大きい部分
には多くの水分が含まれ、温度上昇が小さい部分には水
分あまり含まれていないと判断できる。That is, when a substance is irradiated with microwaves having the same frequency as the natural frequency of water for a certain period of time, when the substance contains water, the water molecules vibrate vigorously and the water molecules vibrate. The temperature of the substance rises due to the exothermic phenomenon caused by the frictional heat between the substances. In particular, this exothermic phenomenon becomes more active in the water-rich portion, and the temperature rises more in the water-rich portion. The temperature distribution of the substance can be visually confirmed by measuring and displaying the temperature of the substance using the temperature distribution measurement display means. Then, from the state of the displayed temperature distribution, it is possible to specify the portion containing a large amount of water. Specifically, it can be determined that a large amount of water is contained in the portion where the temperature rise is large and a small amount of water is contained in the portion where the temperature rise is small.
【００２７】[0027]
【発明の実施の形態】以下に本発明の実施の形態を詳細
に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below.
【００２８】（実施の形態１）本実施の形態１の物質の
吸水性又は吸湿性を評価する試験法においては、試験片
として絶縁層がガラスエポキシ基板からなる銅張積層板
を準備した。尚、前記銅張積層板は、外形寸法が５０ｍ
ｍ×５０ｍｍ、厚みが１．６ｍｍであり、前記銅張積虐
板表面の銅は完全にエッチングにより除去されたものを
使用した。(Embodiment 1) In the test method for evaluating the water absorption or hygroscopicity of the substance of the present embodiment 1, a copper clad laminate having an insulating layer made of a glass epoxy substrate was prepared as a test piece. The copper-clad laminate has an outer dimension of 50 m.
m × 50 mm, thickness 1.6 mm, and copper on the surface of the copper clad laminate completely removed by etching was used.
【００２９】次に、前記銅張積層板を１２５℃に設定さ
れた乾操炉の中に２４時間放置して、前記銅張積層板中
に含まれる水分を除去した。次に、前記銅張積層板を温
度が２５℃、相対湿度が６０％ＲＨの雰囲気中に１時間
放置してから、図示しない表面温度計で前記銅張積層板
の表面温度（Ｔｂ１）を測定した。また、比較のために
表面温度（Ｔｂ１）測定後、前記銅張積層板の重量（ｗ
１）を測定した。Next, the copper clad laminate was left in a dry oven set at 125 ° C. for 24 hours to remove the water contained in the copper clad laminate. Next, after the copper clad laminate is left in an atmosphere having a temperature of 25 ° C. and a relative humidity of 60% RH for 1 hour, the surface temperature (Tb1) of the copper clad laminate is measured with a surface thermometer (not shown). did. For comparison, after the surface temperature (Tb1) was measured, the weight (w) of the copper clad laminate was measured.
1) was measured.
【００３０】前記銅張積層板の表面温度（Ｔｂ１）を測
定した後、図示しないマイクロ波照射装置を用いて前記
銅張積層板にマイクロ波（２．４５ＧＨｚ）を１分間照
射した。マイクロ波を照射後すぐに、前記銅版積層板の
表面温度（Ｔｂ２）を前記表面温度計で測定した。After the surface temperature (Tb1) of the copper-clad laminate was measured, the copper-clad laminate was irradiated with microwaves (2.45 GHz) for 1 minute using a microwave irradiation device (not shown). Immediately after the microwave irradiation, the surface temperature (Tb2) of the copper plate laminate was measured with the surface thermometer.
【００３１】このようにして、表面温度が測定された前
記銅張積層板を第一種圧力容器（ＨＡＳＴ ＳＹＳＴＥ
Ｍ ＴＰＣ−４２２Ｍ、タバイエスペック株式会社製）
に入れて、吸湿処理を施した。吸湿処理は下記表２に示
す３つの条件の中から１基板について１条件とし、１条
件について４枚の銅張積層板を吸湿処理した。In this way, the copper clad laminate whose surface temperature was measured was placed in a first pressure vessel (HAST SYSTE).
(MTPC-422M, manufactured by Tabai Espec Corporation)
And was subjected to a moisture absorption treatment. For the moisture absorption treatment, one condition was selected from the three conditions shown in Table 2 below for one substrate, and four copper clad laminates were subjected to the moisture absorption process for each condition.
【００３２】[0032]
【表２】 [Table 2]
【００３３】尚、銅張積層板を吸湿させる手段として、
本実施の形態１では、相対湿度が１００％の飽和状態で
ＨＡＳＴ試験を行っているが、相対湿度が１００％ＲＨ
でない不飽和のＨＡＳＴ試験でもよく、さらには、銅張
積層板に水分を含ませることができれば、ＨＡＳＴ試験
以外の方法でも構わない。As means for absorbing moisture in the copper clad laminate,
In the first embodiment, the HAST test is performed in a saturated state where the relative humidity is 100%, but the relative humidity is 100% RH.
The unsaturated HAST test may be used, or a method other than the HAST test may be used as long as the copper-clad laminate can be allowed to contain water.
【００３４】上記吸湿条件に前記銅張積層板を曝し後、
前記銅張積層板を温度２５℃、相対湿度６０％ＲＨの雰
囲気中に１時間放置してから、前記表面温度計を用いて
前記銅張積層板の表面温度（Ｔａ１）を測定した。ま
た、表面温度（Ｔａ１）を測定後、前記銅張積層板の重
量（ｗ２）を測定した。その後、マイクロ波照射装置を
用いて前記銅張積層板にマイクロ波（２．４５ＧＨｚ）
を１分間照射した。マイクロ照射完了後すぐに、前記銅
張積層板の表面温度（Ｔａ２）を前記表面温度計で測定
した。After exposing the copper clad laminate to the moisture absorption conditions,
After the copper clad laminate was left in an atmosphere having a temperature of 25 ° C. and a relative humidity of 60% RH for 1 hour, the surface temperature (Ta1) of the copper clad laminate was measured using the surface thermometer. Moreover, after measuring the surface temperature (Ta1), the weight (w2) of the copper clad laminate was measured. Then, a microwave (2.45 GHz) was applied to the copper clad laminate using a microwave irradiation device.
Was irradiated for 1 minute. Immediately after completion of micro irradiation, the surface temperature (Ta2) of the copper clad laminate was measured with the surface thermometer.
【００３５】以上の温度測定データ及び重量測定データ
から、銅張積層板の表面温度の温度変化率及び重量変化
率を算出した。なお、本試験法においては、表面温度の
測定を４回（Ｔａ１、Ｔａ２、Ｔｂ１、Ｔｂ２）行って
いるが、Ｔａ１及びＴｂ２の温度は測定環境の温度とほ
ぼ等しくなるため、吸湿処理前後で測定環境の温度に差
がなければ、Ｔａ１＝Ｔｂ１とみなすことができる。こ
のような場合には、Ｔａ１及びＴｂ１の測定を省略して
も構わない。From the above temperature measurement data and weight measurement data, the temperature change rate and the weight change rate of the surface temperature of the copper clad laminate were calculated. In this test method, the surface temperature is measured four times (Ta1, Ta2, Tb1, Tb2), but since the temperatures of Ta1 and Tb2 are almost equal to the temperature of the measurement environment, the measurement is performed before and after the moisture absorption treatment. If there is no difference in the temperature of the environment, it can be considered that Ta1 = Tb1. In such a case, the measurement of Ta1 and Tb1 may be omitted.
【００３６】また、銅張積層板の温度測定を表面温度計
で行っているが、銅張積層板からの発熱を捉えることが
できれば、サーモラベルを銅張積層板に貼る等の他の手
段を用いてもよい。Although the temperature of the copper-clad laminate is measured by a surface thermometer, if the heat generated from the copper-clad laminate can be captured, another means such as sticking a thermolabel to the copper-clad laminate can be used. You may use.
【００３７】本試験法による測定結果を図１示す。図１
において縦軸は温度変化率であり、横軸は重量変化率で
ある。図１中の○は、表２の各吸湿条件での温度変化率
と重量変化率の値を平均化してプロットしたものであ
る。図１より、重量変化率の増加に伴って、温度変化率
も増加していることが分かる。これらプロットした点に
対して、回帰分析を行ってみると、右上がりの曲線が得
られる。このことは、重量変化率が増すにつれて、温度
変化率は重量変化率よりも大きな割合で増加しているこ
とを意味している。逆に言えば、温度変化率の増加に伴
い、重量変化率の増加の割合は徐々に小さくなっている
ことになる。つまり、圧力の高いＨＡＳＴ試験条件にな
るにしたがって、重量変化率の増加率は徐々に小さくな
ることを意味している。The measurement results of this test method are shown in FIG. Figure 1
In, the vertical axis represents the temperature change rate and the horizontal axis represents the weight change rate. The circles in FIG. 1 are obtained by averaging and plotting the values of the temperature change rate and the weight change rate under each moisture absorption condition in Table 2. It can be seen from FIG. 1 that the temperature change rate also increases as the weight change rate increases. When a regression analysis is performed on these plotted points, a curve that rises to the right is obtained. This means that as the rate of change in weight increases, the rate of change in temperature increases at a rate larger than the rate of change in weight. Conversely, the rate of increase in the rate of change in weight gradually decreases as the rate of change in temperature increases. That is, it means that the increasing rate of the weight change rate becomes gradually smaller as the HAST test condition where the pressure becomes higher is obtained.
【００３８】このように、圧力が大きい試験条件で重量
変化率の増加率が小さくなる原因としては、高い温度の
影響によって銅張積層板の樹脂成分等の一部が溶解し、
高い圧力の影響によって、溶解した物質の全部若しくは
一部が前記銅張積層板の外部へ溶出してしまい、そのた
めに、前記銅張積層板の重量が減少していることが考え
られる。As described above, the reason why the rate of increase in the rate of change in weight becomes small under test conditions where the pressure is high is that part of the resin component of the copper clad laminate dissolves due to the effect of high temperature
It is conceivable that all or part of the dissolved substance is eluted to the outside of the copper-clad laminate due to the influence of the high pressure, which causes the weight of the copper-clad laminate to decrease.
【００３９】以上のことから、マイクロ波を照射して銅
張積層板の温度を上昇させ、銅張積層板の吸水性や吸湿
性を評価する本試験法は、高い圧力においても正確に水
分の吸湿性を捉えることができるので、重量で評価する
試験方法よりも、広い圧力範囲に本試験法を適用するこ
とが可能となる。From the above, the present test method for evaluating the water absorbency and hygroscopicity of a copper-clad laminate by irradiating it with microwaves to raise the temperature of the copper-clad laminate allows accurate measurement of moisture content even at high pressure. Since the hygroscopicity can be grasped, the present test method can be applied to a wider pressure range than the test method evaluated by weight.
【００４０】尚、本実施の形態１では、銅張積層板に吸
湿処理を施す前後においてマイクロ波を照射して、前記
銅張積層板の表面温度の温度差で前記銅張積層板の吸湿
性を判定しているが、銅張積層板に吸湿処理を施してマ
イクロ波を照射し、このときの銅張積層板の表面温度の
みを測定し、その温度から吸湿性を判定することもでき
る。そして、本試験法では、吸収した水分の量に応じて
温度が変化するので、銅張積層板を構成する樹脂材料に
かかわらず正しい測定を行うことができる。In the first embodiment, microwaves are radiated before and after the moisture absorption treatment is applied to the copper-clad laminate, and the hygroscopicity of the copper-clad laminate is determined by the temperature difference of the surface temperature of the copper-clad laminate. However, it is also possible to subject the copper-clad laminate to moisture absorption treatment, irradiate it with microwaves, measure only the surface temperature of the copper-clad laminate at this time, and determine the hygroscopicity from that temperature. In this test method, since the temperature changes depending on the amount of absorbed water, correct measurement can be performed regardless of the resin material forming the copper clad laminate.
【００４１】（実施の形態２）本発明の実施の形態２で
ある物質の吸水分布または吸湿分布の検出方法について
以下に説明する。(Second Embodiment) A method of detecting a water absorption distribution or a moisture absorption distribution of a substance according to a second embodiment of the present invention will be described below.
【００４２】実施の形態２の検出方法では、絶縁層がガ
ラスエポキシ基板からなる銅張積層板１を準備した。
尚、前記銅張積層板１は、外形寸法が１００ｍｍ×９５
ｍｍ、厚みが１．０ｍｍであり、前記銅張積層板１の表
面の銅は完全にエッチングにより除去されたものを使用
した。In the detection method of the second embodiment, a copper clad laminate 1 having an insulating layer made of a glass epoxy substrate was prepared.
The copper-clad laminate 1 has an outer dimension of 100 mm × 95.
The thickness of the copper clad laminate 1 was 1.0 mm, and the thickness of the copper clad laminate 1 was completely removed by etching.
【００４３】次に、前記銅張積層板１を１５０℃に設定
された乾燥炉の中に１時間以上放置して、前記銅張積層
板１中に含まれる水分を除去した後に、前記銅張積層板
１を温度が２５℃、相対湿度が６０％ＲＨの雰囲気中に
１時間放置し、その後、前記銅張積層板１の重量を測定
した。Next, the copper clad laminate 1 is left in a drying oven set at 150 ° C. for 1 hour or more to remove the water contained in the copper clad laminate 1, and then the copper clad laminate is removed. The laminate 1 was left in an atmosphere having a temperature of 25 ° C. and a relative humidity of 60% RH for 1 hour, and then the weight of the copper clad laminate 1 was measured.
【００４４】次に、図示しないマイクロ波照射装置を用
いて前記銅張積層板１に対して周波数が水の固有振動数
と同じである２．４５ＧＨｚのマイクロ波を１分間照射
した。その後、前記銅張積層板１の温度分布を温度分布
測定表示手段であるサーモグラフ装置（ＴＨ３１０４Ｍ
Ｒ、ＮＥＣ三栄社製）を用いて測定した。尚、この測定
は外部からの光が入らないよう暗室内で行った。Next, using a microwave irradiation device (not shown), the copper clad laminate 1 was irradiated with microwaves of 2.45 GHz having a frequency equal to the natural frequency of water for 1 minute. After that, the temperature distribution of the copper clad laminate 1 is measured by a thermograph device (TH3104M) which is a temperature distribution measurement display means.
R, manufactured by NEC San-ei Co., Ltd.). In addition, this measurement was performed in a dark room so that light from the outside would not enter.
【００４５】このようにして、温度分布を測定した前記
銅張積層板１を第一種圧力容器（ＨＡＳＴ ＳＹＳＴＥ
Ｍ ＴＰＣ−４２２Ｍ タバイエスペック社製）に入れ
て、吸湿処理を施した。このときの吸湿処理は、温度が
１３３℃、相対湿度が１００％ＲＨで処理時間は６３時
間とした。尚、本実施の形態２では、銅張積層板１を吸
湿させる手段として、相対湿度が１００％ＲＨの飽和状
態でＨＡＳＴを行っているが、相対湿度が１００％ＲＨ
未満の不飽和のＨＡＳＴでも同様な結果が得られ、さら
には、銅張積層板１に水分を含ませることができれば、
ＨＡＳＴ以外の方法でも構わない。The copper clad laminate 1 whose temperature distribution was measured in this manner was used as a first-class pressure vessel (HAST SYSTE).
MTPC-422M manufactured by Tabai Espec Co., Ltd.) and subjected to a moisture absorption treatment. In the moisture absorption treatment at this time, the temperature was 133 ° C., the relative humidity was 100% RH, and the treatment time was 63 hours. In the second embodiment, HAST is performed in a saturated state where the relative humidity is 100% RH as a means for absorbing the copper-clad laminate 1, but the relative humidity is 100% RH.
Similar results can be obtained with unsaturated HAST of less than less, and further, if the copper-clad laminate 1 can be made to contain water,
A method other than HAST may be used.
【００４６】上記吸湿処理条件下に前記銅張積層板１を
曝した後、前記銅張積層板１を温度２５℃、相対湿度６
０％ＲＨの雰囲気中に１時間放置してから、再び前記銅
張積層板１の重量を測定した。その後、吸湿処理前と同
様な方法で前記銅張積層板１にマイクロ波を１分間照射
してから、暗室にてサーモグラフ装置で前記銅張積層板
１の温度分布を測定した。After exposing the copper-clad laminate 1 to the above-mentioned moisture absorption treatment conditions, the copper-clad laminate 1 is exposed to the temperature of 25 ° C. and the relative humidity of 6
After being left in an atmosphere of 0% RH for 1 hour, the weight of the copper clad laminate 1 was measured again. After that, the copper-clad laminate 1 was irradiated with microwaves for 1 minute in the same manner as before the moisture absorption treatment, and then the temperature distribution of the copper-clad laminate 1 was measured with a thermograph device in a dark room.
【００４７】サーモグラフ装置により測定された銅張積
層板１の温度分布測定結果を図２及び図３示す。図２は
銅張積層板１に吸湿処理を施す前に測定した前記銅張積
層板１の温度分布である。図３は銅張積層板１に吸湿処
理を施した後に測定した前記銅積層板の温度分布であ
る。尚、図２及び図３は、マイクロ波照射完了後、約２
０秒後に測定した温度分布である。2 and 3 show the temperature distribution measurement results of the copper clad laminate 1 measured by a thermograph device. FIG. 2 shows the temperature distribution of the copper-clad laminate 1 measured before subjecting the copper-clad laminate 1 to moisture absorption treatment. FIG. 3 shows a temperature distribution of the copper-clad laminate 1 measured after the copper-clad laminate 1 is subjected to a moisture absorption treatment. 2 and 3 show about 2 after completion of microwave irradiation.
It is a temperature distribution measured after 0 second.
【００４８】図２を見ると、銅張積層板１の全面におい
て、温度分布がほぼ均一であることが分かる。このとき
の温度分布は３２〜３４℃程度であった。一方、図３を
見ると、銅張積層板１の全面において、温度分布は均一
でないことが分かる。特に、前記銅張積層板１の上方部
にはクロス斜線を付して示す温度の高い部分（吸水率の
高い部分）が見られ、またその部分の温度は約４０℃に
まで達していた。また、前記銅張積層板１の下方部には
斜線を付して示す温度がやや高い部分（吸水率の中位の
部分）が見られ、これら両者を囲むように点々を付して
示す温度がわずかに高い部分（吸水率の少ない部分）が
見られた。From FIG. 2, it can be seen that the temperature distribution is almost uniform over the entire surface of the copper clad laminate 1. The temperature distribution at this time was about 32 to 34 ° C. On the other hand, referring to FIG. 3, it can be seen that the temperature distribution is not uniform over the entire surface of the copper clad laminate 1. In particular, in the upper part of the copper-clad laminate 1, a high temperature portion (a portion having a high water absorption rate) indicated by cross hatching was found, and the temperature of the portion reached up to about 40 ° C. Further, in the lower part of the copper clad laminate 1, there is seen a part where the temperature is slightly high (the middle part of the water absorption rate), which is shown by hatching, and the temperature is shown with dots surrounding them. A part with a slightly higher water content (a part with a lower water absorption rate) was seen.
【００４９】また、吸湿処理を施した前記銅張積層板１
の吸水率を従来の方法でも測定してみた。その結果、吸
水率は０．９４％（重量で０．１９４ｇ）の増加である
ことが確認でき、銅張積層板１には吸湿処理によって水
分が押し込まれていることが証明できた。Also, the copper clad laminate 1 that has been subjected to moisture absorption treatment
The water absorption of was also measured by the conventional method. As a result, it was confirmed that the water absorption rate was increased by 0.94% (0.194 g by weight), and it was proved that moisture was pushed into the copper-clad laminate 1 by the moisture absorption treatment.
【００５０】これら２つの結果から、前記銅張積層板１
に水分を押し込み、水分が押し込まれた銅張積層板１に
マイクロ波を照射し発熱させ、前記銅張積層板１の温度
分布を測定することによって、銅張積層板１の吸水分布
や吸湿分布の状態を知ることができる。From these two results, the copper clad laminate 1
Water is pushed into the copper clad laminate 1, and the copper clad laminate 1 in which the water has been pushed is irradiated with microwaves to generate heat, and the temperature distribution of the copper clad laminate 1 is measured. You can know the state of.
【００５１】尚、本実施の形態２では、銅張積層板１の
吸湿分布の状態を検出した例を示しているが、接着剤の
気泡混入による吸湿（吸水）性の評価や、紙や布等に含
まれる水分の分布状態を調べることにも本発明は適用可
能である。In the second embodiment, an example in which the state of moisture absorption distribution of the copper clad laminate 1 is detected is shown. However, evaluation of moisture absorption (water absorption) due to air bubbles in the adhesive, paper or cloth. The present invention can also be applied to examining the distribution state of water contained in, etc.
【００５２】[0052]
【発明の効果】請求項１記載の発明によれば、物質中の
一部の成分が物質外に溶出しても、物質の吸水性又は吸
湿性の判定を誤ることなく評価を行うことができる物質
の吸水性又は吸湿性を評価する試験法を提供することが
できる。According to the invention described in claim 1, even if a part of the components in the substance is eluted out of the substance, the water absorption or hygroscopicity of the substance can be evaluated without error. A test method for evaluating the water absorption or hygroscopicity of a substance can be provided.
【００５３】請求項２記載の発明によれば、請求項１記
載の発明の場合よりも温度測定回数を低減でき、物質の
吸水性又は吸湿性の効率的な評価を行うことができる物
質の吸水性又は吸湿性を評価する試験法を提供するこが
できる。According to the second aspect of the present invention, the number of times of temperature measurement can be reduced as compared with the case of the first aspect of the invention, and the water absorption or hygroscopicity of the substance can be efficiently evaluated. It is possible to provide a test method for evaluating the water resistance or hygroscopicity.
【００５４】請求項３記載の発明によれば、物質の吸水
分布又は吸湿分布を目視可能な状態にすることができ、
物質中に水分が多く含まれる箇所を容易に特定すること
ができる物質の吸水分布又は吸湿分布の検出法を提供す
るこができる。According to the invention of claim 3, the water absorption distribution or the moisture absorption distribution of the substance can be made visible.
It is possible to provide a method for detecting a water absorption distribution or a moisture absorption distribution of a substance, which can easily identify a place where the substance contains a large amount of water.
【図１】本発明の実施の形態１の試験法における銅張積
層板の各吸湿条件での温度変化率と重量変化率の値を平
均化してプロットしたグラフである。FIG. 1 is a graph obtained by averaging and plotting values of a temperature change rate and a weight change rate under each moisture absorption condition of a copper clad laminate in a test method according to a first embodiment of the present invention.
【図２】本発明の実施の形態２の銅張積層板に吸湿処理
を施す前にサーモグラフ装置により測定した温度分布を
示す図である。FIG. 2 is a diagram showing a temperature distribution measured by a thermograph device before subjecting a copper clad laminate of Embodiment 2 of the present invention to a moisture absorption treatment.
【図３】本発明の実施の形態２の銅張積層板に吸湿処理
を施した後にサーモグラフ装置により測定した温度分布
を示す図である。FIG. 3 is a diagram showing a temperature distribution measured by a thermograph device after subjecting a copper clad laminate of Embodiment 2 of the present invention to a moisture absorption treatment.
【図４】物質の成分の一部が物質外部へ溶出した場合の
圧力と重量との関係を示すグラフである。FIG. 4 is a graph showing the relationship between pressure and weight when a part of a substance component is eluted outside the substance.
１ 銅張積層板 1 Copper clad laminate
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2G040 AA03 AB12 BA26 BB04 CA23 DA06 DA15 EA04 EB02 GC01 HA08 ZA05 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 2G040 AA03 AB12 BA26 BB04 CA23 DA06 DA15 EA04 EB02 GC01 HA08 ZA05
Claims (3)
よって前記物質の吸水性又は吸湿性を判定する評価法に
おいて、物質を吸水処理又は吸湿処理する前に、前記物
質に水の固有振動数と同じ振動数をもつマイクロ波を一
定時間照射し、前記マイクロ波を照射中又は照射直後に
前記物質の温度を測定し、前記物質を吸水処理又は吸湿
処理した後に、前記物質に水の固有振動数と同じ振動数
を持つマイクロ波を一定時間照射し、前記マイクロ波を
照射中又は照射直後に前記物質の温度を測定し、吸水処
理又は吸湿処理を施す前に測定した物質の温度と、吸水
処理又は吸湿処理を施した後に測定した前記物質の温度
との変化量又は変化率から前記物質の吸水性又は吸湿性
を判定することを特徴とする物質の吸水性又は吸湿性を
評価する試験法。1. An evaluation method for determining water absorption or hygroscopicity of a substance by subjecting the substance to water absorption treatment or moisture absorption treatment, wherein a natural frequency of water is added to the substance before the water absorption treatment or moisture absorption treatment of the substance. Irradiation with microwaves having the same frequency for a certain period of time, the temperature of the substance is measured during or immediately after the irradiation with microwaves, and after the substance is subjected to water absorption treatment or moisture absorption treatment, the substance has a natural frequency of water. Microwaves having the same frequency as that for a certain period of time, the temperature of the substance is measured during or immediately after the microwave irradiation, and the temperature of the substance measured before the water absorption treatment or the moisture absorption treatment, and the water absorption treatment. Alternatively, a test method for evaluating the water absorption or hygroscopicity of a substance, which comprises determining the water absorption or hygroscopicity of the substance from the amount of change or the rate of change with respect to the temperature of the substance measured after the moisture absorption treatment.
よって前記物質の吸水性又は吸湿性を判定する物質の吸
水性又は吸湿性を評価する試験法において、物質を吸水
処理又は吸湿処理した後に、前記物質に水の固有振動数
と同じ振動数をもつマイクロ波を一定時間照射し、前記
マイクロ波を照射中又は照射直後に前記物質の温度を測
定し、吸水処理又は吸湿処理を施した後に測定した物質
の温度から前記物質の吸水性又は吸湿性を判定すること
を特徴とする物質の吸水性又は吸湿性を評価する試験
法。2. A test method for evaluating the water absorption or hygroscopicity of a substance for determining the water absorption or hygroscopicity of the substance by subjecting the substance to water absorption or hygroscopic treatment. The substance is irradiated with a microwave having the same frequency as the natural frequency of water for a certain period of time, the temperature of the substance is measured during or immediately after the irradiation of the microwave, and then measured after water absorption treatment or moisture absorption treatment. A test method for evaluating the water absorption or hygroscopicity of a substance, which comprises determining the water absorption or hygroscopicity of the substance from the temperature of the substance.
つマイクロ波を一定時間照射し、前記マイクロ波を照射
中又は照射後に、前記物質の温度分布を温度分布測定表
示手段を用いて測定し、前記物質の吸水分布又は吸湿分
布を目視可能な状態に表示することを特徴とする物質の
吸水分布又は吸湿分布の検出方法。3. A substance is irradiated with a microwave having the same frequency as the natural frequency of water for a certain period of time, and the temperature distribution of the substance is measured using a temperature distribution measurement display means during or after the irradiation of the microwave. A method for detecting a water absorption distribution or a moisture absorption distribution of a substance, which comprises measuring and displaying the water absorption distribution or the moisture absorption distribution of the substance in a visually observable state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002013847A JP2003215080A (en) | 2002-01-23 | 2002-01-23 | Test method for evaluating water or moisture absorbing property of material and method of detecting water or moisture absorption distribution of material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002013847A JP2003215080A (en) | 2002-01-23 | 2002-01-23 | Test method for evaluating water or moisture absorbing property of material and method of detecting water or moisture absorption distribution of material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003215080A true JP2003215080A (en) | 2003-07-30 |
Family
ID=27650700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002013847A Withdrawn JP2003215080A (en) | 2002-01-23 | 2002-01-23 | Test method for evaluating water or moisture absorbing property of material and method of detecting water or moisture absorption distribution of material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003215080A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072904A (en) * | 2010-11-11 | 2011-05-25 | 广东生益科技股份有限公司 | Water permeability resistance verifying method for flexible single-sided copper clad plates |
| JP2012225871A (en) * | 2011-04-22 | 2012-11-15 | Toppan Printing Co Ltd | Method for inspecting opening part seal part of fluid container and device thereof |
| JP2014002073A (en) * | 2012-06-19 | 2014-01-09 | Nippon Telegr & Teleph Corp <Ntt> | Humidity estimation device, humidity estimation method, and program |
| CN109724900A (en) * | 2017-10-30 | 2019-05-07 | 山东爸爸的选择健康科技有限公司 | For detecting the device and detection method of the macromolecule distribution that absorbs water in paper diaper |
| CN111257155A (en) * | 2020-03-23 | 2020-06-09 | 浙江理工大学 | Method for detecting moisture absorption performance of printing auxiliary agent under steaming condition |
-
2002
- 2002-01-23 JP JP2002013847A patent/JP2003215080A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072904A (en) * | 2010-11-11 | 2011-05-25 | 广东生益科技股份有限公司 | Water permeability resistance verifying method for flexible single-sided copper clad plates |
| JP2012225871A (en) * | 2011-04-22 | 2012-11-15 | Toppan Printing Co Ltd | Method for inspecting opening part seal part of fluid container and device thereof |
| JP2014002073A (en) * | 2012-06-19 | 2014-01-09 | Nippon Telegr & Teleph Corp <Ntt> | Humidity estimation device, humidity estimation method, and program |
| CN109724900A (en) * | 2017-10-30 | 2019-05-07 | 山东爸爸的选择健康科技有限公司 | For detecting the device and detection method of the macromolecule distribution that absorbs water in paper diaper |
| CN111257155A (en) * | 2020-03-23 | 2020-06-09 | 浙江理工大学 | Method for detecting moisture absorption performance of printing auxiliary agent under steaming condition |
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