KR20060010944A - Method for evaluating of coating adhesion strength - Google Patents

Method for evaluating of coating adhesion strength Download PDF

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KR20060010944A
KR20060010944A KR1020040059556A KR20040059556A KR20060010944A KR 20060010944 A KR20060010944 A KR 20060010944A KR 1020040059556 A KR1020040059556 A KR 1020040059556A KR 20040059556 A KR20040059556 A KR 20040059556A KR 20060010944 A KR20060010944 A KR 20060010944A
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adhesion
energy
coating
measuring
coating film
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Korean (ko)
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송은하
박동환
백광기
김기홍
박천길
신칠석
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현대중공업 주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N2035/1027—General features of the devices
    • G01N2035/1034—Transferring microquantities of liquid
    • G01N2035/1037—Using surface tension, e.g. pins or wires

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Abstract

본 발명은 도막간 부착력 측정 및 예측방법에 관한 것으로, 그 목적은 도막의 표면에너지와 도료의 표면장력으로부터 도막간의 부착력을 정량적으로 측정하고 이를 데이터베이스화함으로써, 실험과 측정을 하지 않고 도막간의 부착력을 예측할 수 있고, 도료간 상호 적용 가능성 여부를 신속하게 파악할 수 있으며, 도막간 부착 결함발생시 신속하고 정확한 원인규명이 가능함과 동시에, 도료별 상호간의 부착력 향상을 꾀할 수 있는 도막간 부착력 측정 및 예측방법을 제공하는 것이다. The present invention relates to a method for measuring and predicting the adhesion between coatings, and its purpose is to quantitatively measure the adhesion between coatings from the surface energy of the coating and the surface tension of the coating, and to make a database of them, thereby improving the adhesion between coatings without experiment and measurement. It is possible to predict the possibility of mutual application between paints, and to quickly and accurately identify the cause of adhesion defects between coatings, and to measure and predict the adhesion between coatings to improve the adhesion between coatings. To provide.

본 발명은 서로 다른 도료에 의해 형성된 도막의 부착력을 측정함에 있어서; 서로 다른 도료중 하도로 사용되는 도막의 표면에너지를 측정하는 단계; 서로 다른 도료중 상도로 사용될 도료의 표면장력을 측정하는 단계; 상기 측정된 도막의 표면에너지와 도료의 표면장력으로부터 고유접착에너지 값을 산출하는 단계; 상기 측정된 도막의 표면에너지, 도료의 표면장력 및 산출된 고유접착에너지 값을 데이터베이스화하여 저장하는 단계; 상기 데이터베이스화된 자료에 의해 임의의 서로 다른 도료간 고유접착에너지를 측정하는 단계로 이루어진 도막간 부착력 측정 및 예측방법을 제공함에 있다. The present invention is to measure the adhesion of the coating film formed by different paints; Measuring the surface energy of the coating film used under the different coating materials; Measuring the surface tension of the paint to be used as a top coat in different paints; Calculating an intrinsic adhesive energy value from the measured surface energy of the coating film and the surface tension of the paint; Storing the measured surface energy of the coating film, the surface tension of the coating material, and the calculated values of intrinsic adhesive energy in a database; It is to provide a method for measuring and predicting the adhesion between the coating film consisting of measuring the intrinsic adhesion energy between any of the different paint by the database data.

도막부착력, 표면장력, 표면에너지, 접촉각, 고유접착에너지Coating adhesion, surface tension, surface energy, contact angle, inherent adhesion energy

Description

도막간 부착력 측정 및 예측방법{Method for evaluating of coating adhesion strength} Method for measuring and predicting adhesion between coatings {Method for evaluating of coating adhesion strength}             

도 1 은 본 발명의 원리를 설명하기 위한 예시도1 is an exemplary view for explaining the principle of the present invention

도 2 는 본 발명에 따른 도막의 표면에너지를 구하기 위한 예시도
2 is an exemplary view for obtaining the surface energy of the coating film according to the present invention

본 발명은 도막간 부착력 측정방법에 관한 것으로, 하도로 사용된 도막의 표면에너지와, 상도로 사용되는 도료의 표면장력을 통해 도막 사이의 부착력을 측정하고 측정값을 데이터베이스화하며 이를 통해 서로 다른 두 도막간의 부착력을 측정할 수 있는 도막간 부착력 측정방법에 관한 것이다. The present invention relates to a method for measuring the adhesion between coatings, by measuring the adhesion between the coating film through the surface energy of the coating film used as the bottom, and the surface tension of the paint used as the top coat, and through the database of the measured values The present invention relates to a method for measuring adhesion between coatings that can measure adhesion between coatings.

일반적으로 제조사가 다른 도료 및 수지(resin) 종류가 다른 도료는 상호간의 부착력이 좋지 않아 교차 적용이 쉽지 않고, 신도료 개발시 기존 도료와의 부착력을 모두 측정해야 하므로 번거롭고 장시간의 노동력이 요구되었다. 도료간 부착 력은 국제 기준에 따른 시험법들 (Pull-off strength test-ASTM D4541와 Tape test-ASTM D3359)에 의해 평가되어 왔으나, 도료 수지(resin)의 종류 및 물성이 다른 경우 수치를 비교하기 힘들고, 도막간 부착력이 높아 층간 박리가 아닌 응집 파괴가 일어나는 경우 도막간 부착력을 정량적으로 확인할 수 없는 문제점이 있었다. 그로 인해 실제 도장 적용 공정에서 그 결과를 효율적으로 적용하는 데는 한계가 있었으며 또한, 도막과 도막 사이의 부착력은 항상 실험과 경험을 토대로 평가되어 왔으므로, 도막간 부착 결함이 발생할 경우에 그 원인 분석 및 대처에 객관적이고 과학적인 근거 제시가 불충분한 점이 있는 등 여러가지 문제점이 있었다.
In general, paints with different manufacturers and paints with different resin types are not easily cross-applied because they have poor adhesion to each other, and the development of new paints requires measurement of both adhesion to existing paints. Adhesion between paints has been evaluated by international standards (Pull-off strength test-ASTM D4541 and Tape test-ASTM D3359). It was difficult and there was a problem that can not be confirmed quantitatively the adhesion between coatings when the cohesive failure occurs rather than the interlayer peeling high adhesion between the coatings. As a result, there was a limit to the effective application of the results in the actual coating application process. Also, the adhesion between the coating film and the coating film has always been evaluated based on experiments and experiences. There were various problems, including insufficient objective and scientific evidence for coping.

본 발명은 이와 같은 문제점을 고려하여 이루어진 것으로, 그 목적은 도막의 표면에너지와 도료의 표면장력으로부터 도막간의 부착력을 정량적으로 측정하고 이를 데이터베이스화함으로써, 실험과 측정을 하지 않고 도막간의 부착력을 예측할 수 있고, 도료간 상호 적용 가능성 여부를 신속하게 파악할 수 있으며, 도막간 부착 결함발생시 신속하고 정확한 원인규명이 가능함과 동시에, 도료별 상호간의 부착력 향상을 꾀할 수 있는 도막간 부착력 측정방법을 제공하는 것이다.
The present invention has been made in view of the above problems, and its object is to quantitatively measure the adhesion between coatings from the surface energy of the coating and the surface tension of the coating and to database them, thereby predicting the adhesion between coatings without experiments or measurements. In addition, it is possible to quickly determine whether the interapplicability between paints, and to provide a method for measuring the adhesion between coatings that can quickly and accurately identify the cause of the adhesion defects between coatings, and to improve the adhesion between the paints.

본 발명은 도막에서의 부착력을 정성적인 측정이 아닌, 도막의 표면에너지와 도료의 표면장력으로부터 서로 다른 도막 계면에서의 부착력을 정량적으로 측정하 는 것으로, 표면장력계를 이용하여 상도로 사용되는 도료의 표면장력을 측정하고, 하도로 사용된 도막의 위로 떨어지는 물방울의 각을 접촉각 측정장치에 의해 측정하여 도막의 표면에너지를 측정하며, 상기 도료의 표면장력과 도막의 표면에너지로부터 두 도막 층간의 부착력을 측정하도록 되어 있다. 또한, 상기와 같은 방법에 의해 측정된 측정값을 데이터베이스화한 후 저장하여, 각 도료간의 부착력을 실험과 측정에 의하지 않고 데이터베이스화된 자료에 의해 도막간의 부착력을 예측할 수 있도록 되어 있다. The present invention is not a qualitative measurement of the adhesion force in the coating film, but by quantitatively measuring the adhesion force at different coating interface from the surface energy of the coating film and the surface tension of the coating material. The surface tension of the coating film was measured by measuring the surface tension of the coating film, and measuring the angle of the water droplets falling on the used coating film by using a contact angle measuring device, and measuring the surface energy of the coating film. It is supposed to measure. In addition, the measured values measured by the method described above are stored in a database and stored so that the adhesion between the coatings can be predicted based on the database data without the adhesion and the adhesion between the paints.

즉, 본 발명은 서로 다른 도료에 의해 형성된 도막의 부착력을 측정함에 있어서; 서로 다른 도료중 하도로 사용되는 도막의 표면에너지를 측정하는 단계; 서로 다른 도료중 상도로 사용될 도료의 표면장력을 측정하는 단계; 상기 측정된 도막의 표면에너지와 도료의 표면장력으로부터 고유접착에너지 값을 산출하는 단계; 상기 측정된 도막의 표면에너지, 도료의 표면장력 및 산출된 고유접착에너지 값을 데이터베이스화하여 저장하는 단계; 상기 데이터베이스화된 자료에 의해 서로 다른 도료간의 고유접착에너지를 측정하는 단계로 이루어져 있다.
That is, the present invention is to measure the adhesion of the coating film formed by different paints; Measuring the surface energy of the coating film used under the different coating materials; Measuring the surface tension of the paint to be used as a top coat in different paints; Calculating an intrinsic adhesive energy value from the measured surface energy of the coating film and the surface tension of the paint; Storing the measured surface energy of the coating film, the surface tension of the coating material, and the calculated values of intrinsic adhesive energy in a database; The intrinsic adhesion energy between the different paints is measured by the database data.

이하 본 발명을 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본 발명의 원리를 설명하기 위한 예시도를 도시한 것으로, 두 물질간의 고유한 접착에너지(Ｗ)는 두 물질간의 상호 작용에 의하여 발생하는 것으로서 새로운 표면이 생성되는데 필요한 에너지와 그 크기가 같으며, 이로 인해 아래의 식 1과 같이 표시된다. Figure 1 illustrates an exemplary view for explaining the principle of the present invention, the inherent adhesion energy (Ｗ) between the two materials is generated by the interaction between the two materials, the energy required to create a new surface and its size This results in Equation 1 below.                     

[식1][Equation 1]

Figure 112004033870784-PAT00001
Figure 112004033870784-PAT00001

Figure 112004033870784-PAT00002
Figure 112004033870784-PAT00002

Figure 112004033870784-PAT00003
: 고유접착에너지
Figure 112004033870784-PAT00003
: Intrinsic Adhesive Energy

Figure 112004033870784-PAT00004
: 기체물질의 표면장력
Figure 112004033870784-PAT00004
: Surface tension of gaseous substance

Figure 112004033870784-PAT00005
: 액체물질의 표면장력
Figure 112004033870784-PAT00005
: Surface tension of liquid substance

Figure 112004033870784-PAT00006
: 고체와 액체 사이의 계면에너지
Figure 112004033870784-PAT00006
: Interfacial energy between solid and liquid

즉, 두 물질간의 고유한 접착에너지는 두 물질간의 계면에너지가 관여하며, 건조된 하도 도막의 표면에너지와 상도로 사용될 도료의 표면장력을 측정하면 도막과 도막 사이의 부착력을 계산할 수 있다.
That is, the inherent adhesion energy between the two materials is related to the interfacial energy between the two materials, and by measuring the surface energy of the dried undercoat and the surface tension of the paint to be used as the top layer, the adhesion between the coating and the coating can be calculated.

도 2 는 본 발명에 따른 도막의 표면에너지를 구하기 위한 예시도를 도시한 것으로, 도막의 표면에너지는 접촉각 측정에 의한 실험 즉, 액체를 사용하여 접촉각을 측정하고, 측정된 접촉각과 수식을 사용하는 간접적인 방법을 사용한다. Figure 2 shows an exemplary view for obtaining the surface energy of the coating film according to the present invention, the surface energy of the coating film is an experiment by measuring the contact angle, that is, measuring the contact angle using a liquid, using the measured contact angle and the formula Use an indirect method

즉,

Figure 112004033870784-PAT00007
: 고체물질의 표면장력,
Figure 112004033870784-PAT00008
: 액체물질의 표면장력,
Figure 112004033870784-PAT00009
: 고체와 액체 사이의 계면에너지, θ : 도막위에 떨어지는 물방울의 각 이라 칭할 경우, 도막의 표면에너지는 아래의 식 2 와 같이 표시된다.In other words,
Figure 112004033870784-PAT00007
: Surface tension of solid material,
Figure 112004033870784-PAT00008
: Surface tension of liquid substance,
Figure 112004033870784-PAT00009
: Interfacial energy between solid and liquid, θ: When referred to as the angle of water droplets falling on the coating film, the surface energy of the coating film is expressed as in Equation 2 below.

[식2][Equation 2]

Figure 112004033870784-PAT00010
Figure 112004033870784-PAT00010

혹은or

Figure 112004033870784-PAT00011
Figure 112004033870784-PAT00011

이와 같은 식2 에 의해 도막의 표면에너지를 산출할 수 있다. 이때, 상기 물방울의 각 θ 는 상용화된 접촉각 측정장치에 의해 측정한다.
The surface energy of a coating film can be computed by such Formula 2. At this time, the angle θ of the water droplets is measured by a commercially available contact angle measuring device.

상기와 같은 식1 및 식 2 에 의해 도료의 표면장력(

Figure 112004033870784-PAT00012
)과 도막의 표면에너지(
Figure 112004033870784-PAT00013
)로부터 두 도막 층간의 부착력(Ｗ)을 구할 수 있다.
The surface tension of the paint according to the above formulas 1 and 2
Figure 112004033870784-PAT00012
) And surface energy of coating
Figure 112004033870784-PAT00013
), The adhesion between the two coating layers can be obtained.

상기와 같은 방법에 의해 측정된 부착력, 도료의 표면장력, 도막의 표면에너지를 각각 데이터베이스화하여 저장한다. The adhesion force measured by the above method, the surface tension of the paint, and the surface energy of the coating film are stored in a database.

상기 저장된 정보(부착력, 도료의 표면장력, 도막의 표면에너지)에 의해 서로 다른 도료의 부착력을 측정하고자 할 경우, 사용되는 도료의 정보(표면장력 또는 표면에너지)를 이용하여 부착에너지를 산출하거나, 해당 도료에 맞는 정보(두 도료간의 부착력)가 있을 경우, 이를 사용하도록 되어 있다. In order to measure the adhesion of different paints based on the stored information (adhesive force, surface tension of the paint, surface energy of the coating film), the adhesion energy is calculated using information (surface tension or surface energy) of the paint used, If there is information appropriate for the paint (adhesion between the two paints), it is to be used.

즉, 상기와 같은 방법에 의해 산출된 도막과 도막사이의 부착에너지는 에너지 단위이나, 실제 시험에서 측정되는 도막 부착력은 압력단위이므로, 상기 산출된 부착에너지를 적절한 도막부착력에 매칭한 후, 이를 통해 도막부착력을 예측할 수 있다.
That is, since the adhesion energy between the coating film and the coating film calculated by the above method is an energy unit, but the coating film adhesion force measured in the actual test is a pressure unit, the calculated adhesion energy is matched to an appropriate coating film adhesion force, and then through this. The film adhesion can be predicted.

이하 본 발명을 실시예에 의해 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail by way of examples.

실시예 1Example 1

선박에 주로 사용되는 에폭시/우레탄 도장 사양 Epoxy / urethane coating specifications mainly used for ships

제품명: 하도 EH2350/상도 UT6581(제조사 KCC)Product name: Hado EH2350 / top UT6581 (manufacturer KCC)

- 표면장력계로부터 구한 상도(UT6581)의 표면장력: 34mJ/m-Surface tension of UT6581 obtained from surface tension meter: 34mJ / m

- 증류수를 이용해 접촉각 측정장치로부터 구한 하도(EH2350)의 접촉각(θ): 61o -Contact angle (θ) of the lower limit (EH2350) obtained from the contact angle measuring device using distilled water: 61 o

접촉각으로부터 구한 하도의 표면에너지 47.37mJ/m  Surface energy 47.37mJ / m obtained from contact angle

- 상기 표면장력과 표면에너지로부터 구한 부착력: 77.7mJ/m
-Adhesion strength obtained from the surface tension and the surface energy: 77.7 mJ / m

실시예 2Example 2

소형전동기에 주로 사용되는 알키드/알키드 도장 사양 Alkyd / Alkyd paint specifications mainly used for small motors

제품명: 하도 MP121/상도 MT330(제조사 KCC) Product name: Hado MP121 / top MT330 (manufacturer KCC)                     

- 표면장력계로부터 구한 상도(MT330)의 표면장력: 39.83mJ/m-Surface tension of MT330 obtained from surface tension meter: 39.83mJ / m

- 증류수를 이용해 접촉각 측정장치로부터 구한 하도(MP121)의 접촉각(θ): 81.25o -Contact angle (θ) of the lower limit (MP121) obtained from the contact angle measuring device using distilled water: 81.25 o

접촉각으로부터 구한 하도의 표면에너지 35.63mJ/m  Surface energy 35.63mJ / m obtained from contact angle

- 상기 표면장력과 표면에너지로부터 구한 부착력: 63.36mJ/m
Adhesion obtained from surface tension and surface energy: 63.36 mJ / m

실시예 3Example 3

실제 사용되지 않는 에폭시/알키드 도장 사양Unused epoxy / alkyd paint specifications

제품명: 하도 EH2350/상도 LT313(제조사 KCC)Product name: Hado EH2350 / top LT313 (manufacturer KCC)

- 표면장력계로부터 구한 상도(LT313)의 표면장력: 39.68mJ/m-Surface tension of top coat (LT313) obtained from surface tension meter: 39.68mJ / m

- 증류수를 이용해 접촉각 측정장치로부터 구한 하도(EH2350)의 접촉각(θ): 61o -Contact angle (θ) of the lower limit (EH2350) obtained from the contact angle measuring device using distilled water: 61 o

접촉각으로부터 구한 하도의 표면에너지 47.37mJ/m  Surface energy 47.37mJ / m obtained from contact angle

- 상기 표면장력과 표면에너지로부터 구한 부착력: 76.35mJ/m
Adhesion obtained from surface tension and surface energy: 76.35 mJ / m

이상에서와 같이 본 발명은, 실제 도장이 수행되는 곳에서의 도료간 부착력을 도막 파괴 없이 빠르고 정확하게 측정하여, 평가 시간을 단축할 수 있고 시험 비용을 절감할 수 있다. 또한 도료의 수지가 다른 도료간 교차 적용은 물론 반복 실험을 배제할 수 있으며, 이를 바탕으로 각 도료 별 상호간의 부착력 향상을 기대할 수 있다. 나아가서는 도료의 표면장력과 표면에너지 측정값을 데이터화함으로써 전혀 실험과 측정을 하지 않고 데이터만으로 도막간의 부착력을 정량적으로 예측, 평가할 수 있는 등 많은 효과가 있다.















As described above, the present invention can quickly and accurately measure the adhesion between the paints at the place where the actual coating is performed without breaking the coating film, thereby reducing the evaluation time and reducing the test cost. In addition, cross-application between paints of different paints can be excluded as well as repeated experiments, and based on this, it can be expected to improve the adhesion between each paint. Furthermore, by measuring the surface tension and surface energy measurement values of the paint, there are many effects such as quantitatively predicting and evaluating the adhesion between coatings without data and experiments at all.















Claims (2)

서로 다른 도료에 의해 형성된 도막의 부착력을 측정 및 예측함에 있어서; In measuring and predicting the adhesion of the coating film formed by different paints; 서로 다른 도료중 하도로 사용되는 도막의 표면에너지를 측정하는 단계; Measuring the surface energy of the coating film used under the different coating materials; 서로 다른 도료중 상도로 사용될 도료의 표면장력을 측정하는 단계; Measuring the surface tension of the paint to be used as a top coat in different paints; 상기 측정된 도막의 표면에너지와 도료의 표면장력으로부터 고유접착에너지 값을 산출하는 단계; Calculating an intrinsic adhesive energy value from the measured surface energy of the coating film and the surface tension of the paint; 상기 측정된 도막의 표면에너지, 도료의 표면장력 및 산출된 고유접착에너지 값을 데이터베이스화하여 저장하는 단계; Storing the measured surface energy of the coating film, the surface tension of the coating material, and the calculated values of intrinsic adhesive energy in a database; 상기 데이터베이스화된 자료에 의해 임의의 서로 다른 도료간 고유접착에너지를 산출하는 단계로 이루어진 것을 특징으로 하는 도막간 부착력 측정 및 예측방법.A method for measuring and predicting adhesion between coating layers, comprising calculating the inherent adhesion energy between different paints by using the database data. 제 1 항에 있어서;The method of claim 1; 상기 산출된 고유접착에너지를 실험에 의해 측정된 도막 부착력에 매칭시키는 단계가 더 포함되는 것을 특징으로 하는 도막간 부착력 측정 및 예측방법A method for measuring and predicting adhesion between coating layers, further comprising matching the calculated unique adhesion energy to the coating adhesion measured by an experiment.
KR1020040059556A 2004-07-29 2004-07-29 Method for evaluating of coating adhesion strength KR20060010944A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655561A (en) * 2014-12-31 2015-05-27 东莞美维电路有限公司 Method for detecting golden finger coating stripping
CN113804590A (en) * 2021-10-08 2021-12-17 湖北武荆高速公路发展有限公司 Marking paint adhesion testing method based on surface energy theory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655561A (en) * 2014-12-31 2015-05-27 东莞美维电路有限公司 Method for detecting golden finger coating stripping
CN113804590A (en) * 2021-10-08 2021-12-17 湖北武荆高速公路发展有限公司 Marking paint adhesion testing method based on surface energy theory

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