FI71020C - FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS - Google Patents

FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS Download PDF

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Publication number
FI71020C
FI71020C FI852648A FI852648A FI71020C FI 71020 C FI71020 C FI 71020C FI 852648 A FI852648 A FI 852648A FI 852648 A FI852648 A FI 852648A FI 71020 C FI71020 C FI 71020C
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FI
Finland
Prior art keywords
paper
time
coating
transmission
light
Prior art date
Application number
FI852648A
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Finnish (fi)
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FI852648A (en
FI852648A0 (en
FI71020B (en
Inventor
Pekka J Aschan
Ari Laine
Original Assignee
Keskuslaboratorio
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 Keskuslaboratorio filed Critical Keskuslaboratorio
Priority to FI852648A priority Critical patent/FI71020C/en
Publication of FI852648A0 publication Critical patent/FI852648A0/en
Priority to SE8602925A priority patent/SE502685C2/en
Priority to DE19863622193 priority patent/DE3622193C2/en
Priority to GB8616383A priority patent/GB2178843B/en
Priority to FR8609784A priority patent/FR2587494B1/en
Priority to JP61156327A priority patent/JPH0731185B2/en
Publication of FI71020B publication Critical patent/FI71020B/en
Application granted granted Critical
Publication of FI71020C publication Critical patent/FI71020C/en
Publication of FI852648A publication Critical patent/FI852648A/en

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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 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

Description

].].

7102071020

MENETELMÄ PAPERIN PIGMENTTI PÄÄLLYSTEEN JÄHMETTYMΓ SPRO-SESSIN SEURAAMISEKSI - FÖRFARANDE FÖR ATT FÖLJA PAPPERS PIGMENTPÄLÄGGNINGS STELNINGSPROCESSMETHOD FOR FOLLOWING THE PROPAGE OF PAPER PIGMENT COATING - FÖRFARANDE FÖR ATT FÖLJA PAPPERS PIGMENT PÄGÄGGINGS STELNINGSPROCESS

5 Keksinnön kohteena on menetelmä paperin p.ig- menttipää1lysteen jähmottymisprosessin seuraamiseksi.The invention relates to a method for monitoring the solidification process of a paper pigment coating.

Paperin pigmenttipää11ysteen jähmettymisproses-sin seuranta on nykyisillä menetelmillä varsin ongelmallista, ja jähmettymisprosessia ei pystytä seuraamaan 10 kunnolla nykyisillä menetelmillä. Mainittu pigmentti- päällysteen j ähine t ty m i sp rosess in seuranta on tärkeää erityisesti hallitun paperin kuivatuksen kannalta, so. paperin kuivatus voidaan säätää ja optimoida tarkasti vasta ha 11 ittae.ssa pigmenttipää 1 lysteen jähmottymis-15 prosessin seuranta. Tässä selityksessä ei kuitenkaan käsitellä paperin kuivatusta; keksintö kohdistuu ainoastaan mainittuun jähmettyrnisprosessin seurantaan.Monitoring the solidification process of the pigment end of the paper is quite problematic with current methods, and the solidification process cannot be properly monitored by current methods. Said monitoring of the solidification of the pigment coating is particularly important for the controlled drying of the paper, i. paper drying can be precisely adjusted and optimized only in ha 11 ittae. in pigment head 1 lyste solidification-15 process monitoring. However, this specification does not address paper drying; the invention relates only to said monitoring of the solidification process.

Esillä olevan keksinnön tarkoituksena on tuoda esiin uusi menetelmä paperin pigmenttipää1lysteen jähmet-2 q tymisprosessin seuraamiseksi. Erityisesti keksinnön tarkoituksena on tuoda esiin mainitunlainen menetelmä, joka soveltuu pigmenttipää 1 lysteen jährnettymisprosessin on-line-seuran taan.It is an object of the present invention to provide a new method for monitoring the solidification process of a paper pigment coating. In particular, it is an object of the invention to provide such a method which is suitable for on-line monitoring of the solidification process of the pigment head 1.

Keksinnölle tunnusomaisten seikkojen osalta 2g viitataan patenttivaatimukseen 1.With respect to the features of the invention, reference is made to claim 1.

Keksintö perustuu veden paperirainassa ja erityisesti pigmenttipää1lyysteessä aiheuttamien valon läpäisevyyden ja valon sironnan seurantaan ajan funktiona pääasiassa pää 1 lyst.yshetkestä lukien. Menetelmässä määrätään paperin läpäisseen valon transmissio, valon heijastus ja/tai kiilto ajan funktiona pää 1 lystyshe(..kestä lukien.The invention is based on the monitoring of the light transmittance and light scattering caused by water in the paper web and in particular in the pigment coating, as a function of time, mainly from the moment of the end. The method determines the transmission, light reflection and / or gloss of light transmitted through the paper as a function of time.

Erityisen edullista on määrittää paperin transmissio Tr ajan t funktiona paperin pää 1lystyshetkestä lukien. Trans in is sio 11 a tarkoitetaan tässä yhteydessä suhdetta Il/Io, jossa II on paperin läpäisseen valon intensitetti ajan t kuluttua päällystyshetkestä ja 2 71020It is particularly advantageous to determine the transmission Tr of the paper as a function of time t from the time the paper is coated. Trans in isio 11a in this context means the ratio II / 10, where II is the intensity of the light transmitted by the paper after time t from the time of coating and 2,71020

Io on paperin pintaan suunnatun valon intensiteetti olennaisesti välittömästi pää 1 1 ystys hetken jälkeen, tai jokin muu valittu intensiteetin perustaso.Io is the intensity of light directed at the surface of the paper substantially immediately after the end of a 1 1 pass, or some other selected base level of intensity.

Keksintö perustuu suoritettuihin tutkimuksiin, 5 joissa on todettu, että päällysteen kosteutta karakteri soi erinomaisesti mainittu paperin transmissio, valon läpäisevyys, valon heijastus ja/tai kiilto. Paperin transmissio ja yleensä valon läpäisevyys laskee erittäin voimakkaasti sen jälkeen, kun ilmaonte 1 oita alkaa muo-10 dostua paperin pintaan piqmenttiaineen muodostavien p a r t i k k e 1 e i d e n väliin. V a s t a a v a s t i märkä paperi on harmaata ja sen väri muuttuu valkeammaksi kosteuspitoisuuden laskiessa; tähän perustuu pjqmenttipäälly.s teen j äh me t tym isproses s in seuraaminen vaa1ou sm i t tauk sen 15 perusteella. Edelleen kostea paperi omaa voimakkaan kiillon, joka häviää paperin kuivaessa; tähän perustuu piqme n11ipää 1 lysteen jähmettymisproses sin seuranta paperin kiillon mittauksen perusteella.The invention is based on studies carried out in which it has been found that the moisture character of the coating plays excellent on said paper transmission, light transmission, light reflection and / or gloss. The transmission of the paper and, in general, the light transmittance decrease very sharply after the air voids begin to form on the surface of the paper between the pigments forming the pigment substance. Wet paper is gray and turns whiter as the moisture content decreases; based on this pjqmenttipäälly.s i do we t tym isproses s in following vaa1ou sm i t pause 15 basis. Still, moist paper has a strong gloss that disappears when the paper dries; this is based on the monitoring of the solidification process of the film on the basis of the measurement of the gloss of the paper.

Määritettäessä paperin transmissio ajan funk-2Q tiona pää 1lystyshetkestä lukien todetaan, että transmis sio laskee aluksi hyvin loivasti; loivaa vai liettä seuraa jyrkkä transmission lasku, joka sijoittuu pääasiassa paperin kuivauksen siihen vaiheeseen, jolloin ilmaonte-loita alkaa syntyä paperin päällysteen muodostavien 25 partikkeleiden lomiin. Mainitun jyrkemmän laskun, kriit tisen alueen jälkeen seuraa hyvin loiva lasku, jossa transmissio lähenee logaritmiseen tapaan kuivan paperin transmissioarvoa. Paperin valon heijastus ja kiilto muuttuvat samaan tapaan kuin transmissio ajan funktiona.When determining the transmission of paper as a function of time from the time of coating, it is found that the transmission initially decreases very gently; the gentle or slurry is followed by a sharp decrease in transmission, which is located mainly at the stage of drying the paper at which the air cavities begin to form during the holidays of the particles forming the paper coating. This steeper decrease, the critical range, is followed by a very gentle decrease, in which the transmission approaches the transmission value of dry paper in a logarithmic manner. The light reflection and gloss of paper change in the same way as transmission as a function of time.

Paperin transmissio, valon heijastus ja/tai kiilto määritetään sopivasti samaan tapaan kuin tehdään normaalisti kuivan paperin transmissio-, valon heijastus- ja kiiltomittauksien yhteydessä. Tätä tunnettua tekniikkaa ei esillä olevan hakemuksen yhteydessä kuvata lähemmin.The transmission, light reflection and / or gloss of the paper are suitably determined in the same manner as is normally done for dry paper transmission, light reflection and gloss measurements. This prior art will not be described in more detail in the context of the present application.

Me ne t e 1 mä ssä on eri ty i sen a rvok a s t a se , et t.ä menetelmän avulla voidaan seurata piqmen h h i pää 11 ys teeri 35 3 71020 jähmettymisastetta tarkoin mainitulla kriittisellä jMhmettyrnisa1uee1 la. Täten paperin kuivatusta voidaan ohjata ja kuivatus voidaan optimoida uuden menetelmän avulla.We have a special value that this method can be used to monitor the degree of solidification of piqmen h h i end 11 yster 35 35 71020 with the well-mentioned critical jMhmettyrnisa1uee1 la. Thus, the drying of the paper can be controlled and the drying can be optimized by a new method.

5 Keksintöä selostetaan seuraavassa yksityiskoh taisesti suoritusesimerkin avulla viitaten oheiseen piirustukseen, jossa on esitettypi lot-plant-mittakaavas-sa suoritetun päällystyksen yhteydessä määritetty paperin transmissiokäyrä kuivatuksen yhteydessä.The invention will now be described in detail, by way of example, with reference to the accompanying drawings, in which a paper transmission curve determined in connection with coating on a lot-plant scale in connection with drying is shown.

10 Tutkimuksessa paperia valaistiin sen toiselta puolelta vakiotehon omaavalla valolähteellä. Paperin läpäisseen valon intensiteetin suhde perustasoksi valittuun märän paperin läpäisseen valon intensiteettiin, so. paperin transmissio, määritettiin olennaisesti 15 välittömästi päällystyshetken, so. appiikoinnin jälkeen sekä edelleen ajan t funktiona mainitusta appiikointihet-kestä lukien. Appiikoinnin kohdalla mitattua transmis-sioarvoa on täten merkitty luvulla 100% ja ajan funktiona saadut arvot on esitetty kuviossa kuvaajana. Ku-2o viosta näkyy selvästi transmission jyrkkä lasku mer kityllä kriittisellä jähme11tymisa1uee11 a, joka on välillä Tr = 50-90%.10 In the study, paper was illuminated on one side with a light source of constant power. The ratio of the intensity of light transmitted through the paper to the intensity of light transmitted through the wet paper selected as the base level, i. paper transmission, was determined substantially immediately at the time of coating, i.e. after application and further as a function of time t from said application time. The transmission value measured at the application is thus denoted by the number 100% and the values obtained as a function of time are shown in the figure as a graph. The Ku-20o clearly shows a sharp decrease in transmission with a marked critical solidification range of Tr = 50-90%.

Keksintö on tarkoitettu sovellettavaksi oheisten patenttivaatimuksien puitteissa ra jo i t tarua tta sitä 25 esitettyyn suoritusesimerkkiin. Tällöin menetelmässä voidaan käyttää mitä tahansa valon aa 1 lonpituusa1uetta, sopivasti näkyvän valon aluetta.The invention is intended to be applied within the scope of the appended claims without limiting it to the embodiment shown. In this case, any range of light aa 1, suitably a range of visible light, can be used in the method.

30 3530 35

Claims (3)

7102071020 1. Menetelmä paperin pigmenttipää1lysteen jähmettyrnisprosessin seuraamiseksi, tunnet-t u siitä, että menetelmässä valaistaan paperi ja määrätään paperin läpäisseen valon intensiteetti, pape- 5 rin valon heijastus ja/tai paperin kiilto ajan t funktiona päällystyshetkestä lukien.A method for monitoring the solidification process of a paper pigment coating, characterized in that the method illuminates the paper and determines the intensity of light transmitted through the paper, the light reflection of the paper and / or the gloss of the paper as a function of time t from the time of coating. 2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että menetelmässä määrätään suhde Il/Io ajan t funktiona pää 11 ystyshetkestä lu- 10 kien, jossa Io on märän paperin läpäisseen valon intensiteetti, paperin vaaleus tai märän paperin kiilto olennaisesti välittömästi päällystyshetken jälkeen ja II on paperin läpäisseen valon intensitetti, paperin valon heijastus tai vast, paperin kiilto ajan t kuluttua 15 paperin pää 1lystyshetkestä.A method according to claim 1, characterized in that the method determines the ratio II / 10 as a function of time t from the moment of coating 11, where I 10 is the intensity of light transmitted through the wet paper, the brightness of the paper or the gloss of the wet paper substantially immediately after the coating time and II is the intensity of the light transmitted by the paper, the reflection of the light from the paper, or the gloss of the paper after time t 15 after the time of coating the paper. 3. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että menetelmässä määrätään paperin transmissio Tr ajan t funktiona paperin pääl-lystyshetkestä lukien.A method according to claim 1, characterized in that the method determines the transmission Tr of the paper as a function of time t from the moment of coating the paper.
FI852648A 1985-07-04 1985-07-04 FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS FI71020C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FI852648A FI71020C (en) 1985-07-04 1985-07-04 FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS
SE8602925A SE502685C2 (en) 1985-07-04 1986-07-01 Ways to follow the solidification process for pigment coatings of paper
DE19863622193 DE3622193C2 (en) 1985-07-04 1986-07-02 Process for tracking the solidification process of pigment coatings on paper
GB8616383A GB2178843B (en) 1985-07-04 1986-07-04 Method for following the solidification process of pigment coatings of paper
FR8609784A FR2587494B1 (en) 1985-07-04 1986-07-04 PROCESS FOR FOLLOWING THE PROCESS OF SOLIDIFICATION OF PIGMENTARY COATINGS OF PAPER
JP61156327A JPH0731185B2 (en) 1985-07-04 1986-07-04 How to track the solidification process of pigment coatings on paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI852648A FI71020C (en) 1985-07-04 1985-07-04 FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS
FI852648 1985-07-04

Publications (4)

Publication Number Publication Date
FI852648A0 FI852648A0 (en) 1985-07-04
FI71020B FI71020B (en) 1986-07-18
FI71020C true FI71020C (en) 1986-10-27
FI852648A FI852648A (en) 1987-01-05

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FI852648A FI71020C (en) 1985-07-04 1985-07-04 FOERFARANDE FOER ATT FOELJA PAPPERS PIGMENTPAOLAEGGNINGS STELNINGSPROCESS

Country Status (6)

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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)

* Cited by examiner, † Cited by third party
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
WO1998044201A1 (en) * 1997-03-27 1998-10-08 Voith Sulzer Papiermaschinen Gmbh 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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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
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

Also Published As

Publication number Publication date
FI852648A (en) 1987-01-05
SE8602925D0 (en) 1986-07-01
FI852648A0 (en) 1985-07-04
GB2178843A (en) 1987-02-18
SE8602925L (en) 1987-01-05
DE3622193C2 (en) 1995-07-13
GB8616383D0 (en) 1986-08-13
FI71020B (en) 1986-07-18
SE502685C2 (en) 1995-12-11
JPS6258000A (en) 1987-03-13
GB2178843B (en) 1989-07-12
FR2587494A1 (en) 1987-03-20
DE3622193A1 (en) 1987-01-15
FR2587494B1 (en) 1991-10-25
JPH0731185B2 (en) 1995-04-10

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