FR2587494A1 - PROCESS FOR FOLLOWING THE PROCESS OF SOLIDIFICATION OF PIGMENTARY COATINGS OF PAPER - Google Patents
PROCESS FOR FOLLOWING THE PROCESS OF SOLIDIFICATION OF PIGMENTARY COATINGS OF PAPER Download PDFInfo
- Publication number
- FR2587494A1 FR2587494A1 FR8609784A FR8609784A FR2587494A1 FR 2587494 A1 FR2587494 A1 FR 2587494A1 FR 8609784 A FR8609784 A FR 8609784A FR 8609784 A FR8609784 A FR 8609784A FR 2587494 A1 FR2587494 A1 FR 2587494A1
- Authority
- FR
- France
- Prior art keywords
- paper
- light
- solidification
- coating
- time
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000007711 solidification Methods 0.000 title claims abstract description 18
- 230000008023 solidification Effects 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 10
- 239000000049 pigment Substances 0.000 claims description 7
- 150000001768 cations Chemical class 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 8
- 238000001035 drying Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/34—Paper
- G01N33/343—Paper pulp
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/32—Paints; Inks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
- G01N2021/8427—Coatings
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Mathematical Physics (AREA)
- Paper (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
PROCEDE POUR SUIVRE LE PROCESSUS DE SOLIDIFICATION DE REVETEMENTS PIGMENTAIRES DU PAPIER, EN PARTICULIER POUR DES OPERATIONS EN CONTINU. CONFORMEMENT A CE PROCEDE, ON ECLAIRE LE PAPIER ET ON DETERMINE L'INTENSITE DE LA LUMIERE TRANSMISE, LA LUMINOSITE DU PAPIER ETOU LE BRILLANT DU PAPIER EN FONCTION DU TEMPS ECOULE A PARTIR DU MOMENT DE L'APPLICATION DU REVETEMENT.PROCESS FOR FOLLOWING THE SOLIDIFICATION PROCESS OF PIGMENTARY COATINGS OF PAPER, IN PARTICULAR FOR CONTINUOUS OPERATIONS. ACCORDING TO THIS PROCEDURE, THE PAPER IS LIGHTED AND THE INTENSITY OF THE TRANSMITTED LIGHT, THE LUMINOSITY OF THE PAPER AND OR THE BRIGHTNESS OF THE PAPER ARE DETERMINED AS A FUNCTION OF THE TIME ELAPSED FROM THE TIME OF APPLICATION OF THE COATING.
Description
ii
PROCEDE POUR SUIVRE LE PROCESSUS DE SOLIDIFICATION DE PROCESS FOR FOLLOWING THE SOLIDIFICATION PROCESS OF
REVETEMENTS PIGMENTAIRES DU PAPIERPIGMENTAL PAPER COATINGS
La présente invention se rapporte à un procédé pour suivre le processus de solidification de revête- The present invention relates to a method for monitoring the coating solidification process.
ments pigmentaires du papier.pigment elements of paper.
Le contrôle du processus de solidification dans le revêtement du papier pose beaucoup de problèmes Controlling the solidification process in the paper coating poses many problems
lorsque l'on utilise les procédés existants, et le dé- when using existing processes, and the
roulement de la solidification est impossible à suivre par les procédés classiques. Le suivi du processus de solidification roll is impossible to follow by conventional methods. Monitoring the process
solidification, est, cependant, important, particulière- solidification is, however, important, particular-
ment pour le contrôle rigoureux du processus de séchage du papier couché, autrement dit, seul le suivi exact du for the rigorous control of the drying process of coated paper, in other words, only the exact monitoring of the
processus de solidification permet de réguler et d'opti- solidification process makes it possible to regulate and opti-
miser le processus de séchage. Cependant, la présente set the drying process. However, this
description ne se rapporte pas au processus pour le description does not relate to the process for the
séchage du papier; l'invention se rapporte au suivi paper drying; the invention relates to monitoring
dudit processus de solidification seulement. of said solidification process only.
Le but de la présente invention est de proposer 2O The purpose of the present invention is to provide 2O
un nouveau procédé pour suivre le processus de solidifi- a new process to follow the solidification process
cation des revêtements pigmentaires du papier. Le but spécifique de l'invention est de proposer un procédé qui puisse être utilisé pour suivre en continu le processus cation of pigment coatings on paper. The specific aim of the invention is to propose a method which can be used to continuously monitor the process
de solidification des revêtements pigmentaires. solidification of pigment coatings.
Le procédé selon l'invention pour suivre le processus de solidification de revêtements pigmentaires du papier, se caractérise par le fait qu'on éclaire le papier et qu'on détermine la lumière transmise, la luminosité (réflexion diffuse de la lumière) et/ou le brillant de la lumière, en fonction du temps t écoulé à The method according to the invention for monitoring the solidification process of pigment coatings on paper, is characterized by the fact that the paper is illuminated and that the transmitted light, the luminosity (diffuse reflection of light) and / or are determined. the brightness of the light, as a function of the time t elapsed at
partir du moment de l'application du revêtement. from the moment of application of the coating.
La présente invention est basée sur -le suivi de la transmission de la lumière et de la dispersion de la lumière, qui sont provoquées par l'eau dans la bande de papier, particulièrement en fonction du temps écoulé The present invention is based on the monitoring of the light transmission and the dispersion of light, which are caused by the water in the paper web, particularly as a function of the elapsed time.
depuis le moment de l'application du revêtement. from the time of application of the coating.
Conformément au procédé selon la présente invention, on détermine la transmission ou la luminosité (réflexion diffuse) ou le brillant du papier couché en fonction du temps qui s'écoule depuis le moment de l'application du revêtement. Il est particulièrement utile de déterminer la transmission de la lumière Tr. Dans ce contexte, la transmission de la lumière est définie comme étant le rapport I1/IO, o I1 est l'intensité de la lumière transmise à travers le papier, et IO0 est l'intensité de According to the method according to the present invention, the transmission or the luminosity (diffuse reflection) or the gloss of the coated paper is determined as a function of the time which has elapsed since the moment of application of the coating. It is particularly useful to determine the light transmission Tr. In this context, the light transmission is defined as the ratio I1 / IO, where I1 is the intensity of the light transmitted through the paper, and IO0 is the intensity of
la lumière dirigée vers la surface du papier. light directed at the surface of the paper.
La présente invention repose sur des résultats d'essais, au cours desquels on a remarqué que la teneur en humidité de la couche de revêtement est caractérisée, The present invention is based on test results, during which it has been noted that the moisture content of the coating layer is characterized,
d'une excellente manière, par la transmission de lu- in an excellent way, by transmitting
mière, la luminosité ou le brillant du papier couché. La transmission du papier et la pénétration de la lumière diminue très rapidement dès qu'il se forme des cavités remplies d'air à la surface du papier, entre les particules -du pigment de revêtement. Au même moment, la luminosité de la surface du papier augmente avec la diminution de la teneur en humidité; ceci constitue la base pour le suivi du processus de solidification des revêtements pigmentaires au moyen de la détermination de la luminosité. En outre, le papier humide présente une valeur de brillant élevée qui décroit avec la diminution de la teneur en humidité; ceci constitue la base pour le suivi du processus de solidification des revêtements material, brightness or shine of coated paper. The transmission of paper and the penetration of light decreases very quickly as soon as air-filled cavities form on the surface of the paper, between the particles of the coating pigment. At the same time, the brightness of the paper surface increases with the decrease in the moisture content; this forms the basis for monitoring the solidification process of pigment coatings by means of determining the luminosity. In addition, wet paper has a high gloss value which decreases with decreasing moisture content; this constitutes the basis for monitoring the solidification process of the coatings
pigmentaires au moyen.de la détermination du brillant. pigmentary by means of the determination of gloss.
La détermination de la transmission du papier en Determining the transmission of paper in
fonction du temps écoulé à partir du moment de l'appli- function of the time elapsed from the moment of application
cation du revêtement montre que la transmission diminue très lentement au début; après la phase lente, suit une cation of the coating shows that the transmission decreases very slowly at the start; after the slow phase, follows a
rapide diminution de la transmission, cette phase cor- rapid decrease in transmission, this phase
respondant à la formation des cavités remplies d'air entre les particules du revêtement du papier. Après cette diminution plus forte de la plage critique, suit corresponding to the formation of air-filled cavities between the particles of the paper coating. After this further decrease in the critical range, follows
une très lente diminution de la transmission, o la va- a very slow decrease in transmission, where the
leur de la transmission se rapproche de celle du papier sec. La luminosité et le brillant-se modifient de la même manière que ce qui a été indiqué ci-dessus en their transmission is close to that of dry paper. The brightness and the brightness change in the same way as what was indicated above in
fonction du temps.function of time.
La transmission, la luminosité et/ou le brillant du papier humide sont déterminés de la même manière que sont déterminés la transmission, la luminosité et le brillant du papier sec. Par conséquent, cette technique The transmission, brightness and / or gloss of wet paper is determined in the same way as the transmission, brightness and gloss of dry paper are determined. Therefore, this technique
connue n'est pas décrite plus en détail dans cette des- known is not described in more detail in this
cription. La valeur de la présente invention vient de la possibilité de suivre de façon précise, le degré de cription. The value of the present invention comes from the possibility of precisely monitoring the degree of
solidification pendant la plage critique de solidifica- solidification during the critical solidification range
tion.tion.
De cette manière, le séchage peut être corrigé et le processus de séchage peut être optimisé grâce au In this way the drying can be corrected and the drying process can be optimized thanks to the
nouveau procédé.new process.
Dans ce qui suit, la présente invention est décrite plus en détail à l'aide d'un exemple d'un mode de réalisation, référence étant faite au dessin annexé In the following, the present invention is described in more detail using an example of an embodiment, reference being made to the accompanying drawing.
montrant une courbe de transmission obtenue dans un es- showing a transmission curve obtained in an es-
sai de séchage, au cours du revêtement d'une bande de drying time, during the coating of a strip of
papier à l'échelle d'une installation d'essai. paper at the scale of a test facility.
Dans l'essai, le papier a été éclairé d'un côté, In the test, the paper was lit on one side,
à l'aide d'une source de lumière de puissance constante. using a light source of constant power.
La transmission, qui est le rapport de l'intensité de la lumière transmise à l'intensité de la lumière dirigée sur la surface du papier, a été déterminée immédiatement The transmission, which is the ratio of the intensity of the transmitted light to the intensity of the light directed onto the surface of the paper, was determined immediately
après l'application du revêtement et, ensuite, en fonc- after the coating has been applied and then in operation
tion du temps t écoulé à partir du moment de l'applica- tion of the time t elapsed from the moment of application
tion. La valeur de la transmission déterminée immédiate- tion. The value of the transmission determined immediately-
ment après l'application représente la valeur de 100 % dans cet essai, et les valeurs obtenues en fonction du temps sont représentées sous la forme d'une courbe dans le diagramme. Sur le diagramme, on peut remarquer la forte diminution de la transmission pendant la plage critique de solidificaiton, indiquée comme allant de Tr ment after the application represents the value of 100% in this test, and the values obtained as a function of time are represented in the form of a curve in the diagram. On the diagram, one can notice the strong decrease of the transmission during the critical solidification range, indicated as going from Tr
= 50 % à Tr = 90 %.= 50% at Tr = 90%.
Le mode de réalisation décrit ci-dessus a été donné à titre purement illustratif et non limitatif. En conséquence, pour le procédé décrit, on peut utiliser n'importe quelle longueur d'onde de lumière, de façon The embodiment described above has been given purely by way of illustration and without limitation. Consequently, for the method described, any wavelength of light can be used, so that
avantageuse, par exemple, celles du rayonnement visible. advantageous, for example, those of visible radiation.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI852648A FI71020C (en) | 1985-07-04 | 1985-07-04 | FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2587494A1 true FR2587494A1 (en) | 1987-03-20 |
| FR2587494B1 FR2587494B1 (en) | 1991-10-25 |
Family
ID=8521083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8609784A Expired - Fee Related FR2587494B1 (en) | 1985-07-04 | 1986-07-04 | PROCESS FOR FOLLOWING THE PROCESS OF SOLIDIFICATION OF PIGMENTARY COATINGS OF PAPER |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH0731185B2 (en) |
| DE (1) | DE3622193C2 (en) |
| FI (1) | FI71020C (en) |
| FR (1) | FR2587494B1 (en) |
| GB (1) | GB2178843B (en) |
| SE (1) | SE502685C2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2667940B1 (en) * | 1990-10-11 | 1992-12-18 | Centre Tech Ind Papier | PROCESS FOR CONTINUOUSLY MEASURING THE DYNAMIC WATER RETENTION OF A COATING ON A CARRIER AND IN PARTICULAR ON A SHEET OF PAPER. |
| DE4442240A1 (en) * | 1994-11-28 | 1996-05-30 | Fogra Forschungsgesellschaft D | Fast determn. of residual solvent in gravure print |
| CA2255656A1 (en) * | 1997-03-27 | 1998-10-08 | Wilhelm Gansberger | Method and device for coating a continuous strip of material, specially paper or cardboard, with a liquid or paste-like application medium, method for the production of a coated strip |
| US6184991B1 (en) * | 1999-04-19 | 2001-02-06 | Hewlett-Packard | Apparatus and method of measuring dry time of printing composition |
| US6805899B2 (en) | 2002-01-30 | 2004-10-19 | Honeywell International Inc. | Multi-measurement/sensor coating consolidation detection method and system |
| JP5569738B2 (en) * | 2010-10-01 | 2014-08-13 | 公益財団法人鉄道総合技術研究所 | Liquid state evaluation method for porous material and liquid state evaluation system for porous material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3220378A (en) * | 1962-06-15 | 1965-11-30 | Norman A Lefevre | Means to monitor operation of a coating and drying apparatus |
| US3388594A (en) * | 1966-11-09 | 1968-06-18 | Borden Co | Apparatus for measuring the drying length of coating materials |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52128196A (en) * | 1976-04-20 | 1977-10-27 | Hitachi Shipbuilding Eng Co | Method of measuring water content of thin material free from increment of thickness due to water contained |
| JPS533889A (en) * | 1976-06-30 | 1978-01-13 | Matsushita Electric Works Ltd | Measuring method for permeability of stencil paper |
| JPS5613242A (en) * | 1979-07-16 | 1981-02-09 | Miyata Jidoki Hanbai Kk | Car body inspection and service equipment |
-
1985
- 1985-07-04 FI FI852648A patent/FI71020C/en not_active IP Right Cessation
-
1986
- 1986-07-01 SE SE8602925A patent/SE502685C2/en not_active IP Right Cessation
- 1986-07-02 DE DE19863622193 patent/DE3622193C2/en not_active Expired - Fee Related
- 1986-07-04 JP JP61156327A patent/JPH0731185B2/en not_active Expired - Lifetime
- 1986-07-04 GB GB8616383A patent/GB2178843B/en not_active Expired
- 1986-07-04 FR FR8609784A patent/FR2587494B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3220378A (en) * | 1962-06-15 | 1965-11-30 | Norman A Lefevre | Means to monitor operation of a coating and drying apparatus |
| US3388594A (en) * | 1966-11-09 | 1968-06-18 | Borden Co | Apparatus for measuring the drying length of coating materials |
Also Published As
| Publication number | Publication date |
|---|---|
| FI71020B (en) | 1986-07-18 |
| SE8602925D0 (en) | 1986-07-01 |
| DE3622193A1 (en) | 1987-01-15 |
| DE3622193C2 (en) | 1995-07-13 |
| GB2178843B (en) | 1989-07-12 |
| JPH0731185B2 (en) | 1995-04-10 |
| GB8616383D0 (en) | 1986-08-13 |
| FI852648A (en) | 1987-01-05 |
| FR2587494B1 (en) | 1991-10-25 |
| GB2178843A (en) | 1987-02-18 |
| JPS6258000A (en) | 1987-03-13 |
| SE8602925L (en) | 1987-01-05 |
| FI71020C (en) | 1986-10-27 |
| SE502685C2 (en) | 1995-12-11 |
| FI852648A0 (en) | 1985-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0805347A3 (en) | Surface plasmon sensor | |
| FR2587494A1 (en) | PROCESS FOR FOLLOWING THE PROCESS OF SOLIDIFICATION OF PIGMENTARY COATINGS OF PAPER | |
| FI960244A0 (en) | Method for quantifying paper and applying the procedure | |
| FR2508170A1 (en) | OBJECT CONTROL SYSTEM | |
| FR2665241A1 (en) | METHOD AND APPARATUS FOR OPTIMIZING THE AIR / FUEL RATIO IN THE FUEL GAS SUPPLY OF A RADIANT BURNER. | |
| SE9501280L (en) | Measurement on-line of paper pulp equation by color shift of fluorescence | |
| EP0171300B1 (en) | Device for determining the pour point of a gas oil | |
| WO2003002973A3 (en) | Mirror fluorometer | |
| EP0379281A3 (en) | Web inspecting method and apparatus | |
| FR2474552A1 (en) | RADIATION CONTROL DEVICE AND METHOD FOR MATERIAL MANUFACTURING MACHINE USING BETA-RAY THICKNESS MEASURING APPARATUS | |
| EP0080406B1 (en) | Method and apparatus for interrogating a combustible gas concentration sensor | |
| FR2667940A1 (en) | METHOD FOR CONTINUOUSLY MEASURING THE DYNAMIC WATER RETENTION OF A COATING ON A SCROLLING MEDIUM AND IN PARTICULAR ON A PAPER SHEET | |
| WO2004013619A2 (en) | Method and device for in-line measurement of characteristics of the surface coating of a metallurgy product | |
| JPH10267859A (en) | Apparatus for detecting defect in optical fiber coat layer and inspection method | |
| EP0169790B1 (en) | Device for the continuous measurement of the formation of a sheet of paper | |
| EP0101049B1 (en) | Device for monitoring the thickness of thin, hardly absorbing films | |
| FR2732762A1 (en) | METHOD OF DETECTION OF THE VARIATION OF THE DIAMETER OF AN OPTICAL FIBER AND METHOD OF MANUFACTURING OF FIBER OPTIC | |
| Demay et al. | In situ spectroscopic ellipsometry of mercury cadmium telluride MBE layers | |
| EP0041458B1 (en) | Apparatus for determining the cloud point of a liquid composed of at least two components with different freezing points | |
| EP0297973A1 (en) | Coating control process for articles | |
| Bailie et al. | The fading of some traditional pigments as a function of relative humidity | |
| CA2895900A1 (en) | Method for controlling the production of nanopowder of a given diameter from at least acetylene contained in a pressurised cylinder | |
| FR2502358A1 (en) | Liq. level controller for ion exchange resin mfr. - uses circuit to convert video signals from camera to control signals for actuation of inlet and outlet valves | |
| EP3887801B1 (en) | Gas sensor comprising a pulsed light source | |
| LU81728A1 (en) | PROCESS FOR CONTROLLING THE QUALITY OF COATED OR NON-COATED SURFACES |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |