SE455318B - SET OF PAPER CONTAINING CLAY OR OTHER FILLERS - Google Patents
SET OF PAPER CONTAINING CLAY OR OTHER FILLERSInfo
- Publication number
- SE455318B SE455318B SE8500162A SE8500162A SE455318B SE 455318 B SE455318 B SE 455318B SE 8500162 A SE8500162 A SE 8500162A SE 8500162 A SE8500162 A SE 8500162A SE 455318 B SE455318 B SE 455318B
- Authority
- SE
- Sweden
- Prior art keywords
- pulp
- paper
- polymer
- filler
- ground
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
- D21H17/375—Poly(meth)acrylamide
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
- D21H23/765—Addition of all compounds to the pulp
Description
15 20 25 30 455 3181 Ändamålet med uppfinningen Andamålet med denna uppfinning är att uppnå en bättre fyllmedelsrentention utan att skapa täta agglomerat av fyll- En lösning på detta problem har befunnits vara att utflocka fyllmedlet tillsammans med en finfraktion av vedfibriller, så att fyllmedelspartiklarna hålls åtskilda av dessa fibriller och samtidigt av fibrillerna binds i som lätt avfiltreras vid form- medelspartiklar. stora. voluminösa flockar, ningen av papperet och behåller sin plats i papperet trots vattenflödet genom detta vid avvattning och pressning på pappersmaskinen. Liksom fyllmedelspartiklarna har fibriller- na en förmåga att öka ljusspridningen och därmed papperets opacitet, om ett avstånd över en halv' våglängd kan bibe- hållas Detta senare villkor befrämjas även av samflockningen av finfrak- tion och fyllmedel. ' mellan fibrillerna i det färdiga papperet. The object of the invention The object of this invention is to achieve a better filler retention without creating dense agglomerates of filler. A solution to this problem has been found to flocculate the filler together with a fine fraction of wood fibrils, so that the filler particles are kept separate. of these fibrils and at the same time of the fibrils are bound in which are easily filtered off at formula particles. large. voluminous flocks, the ning of the paper and retains its place in the paper despite the water flow through it during dewatering and pressing on the paper machine. Like the filler particles, the fibrils have an ability to increase the light scattering and thus the opacity of the paper, if a distance of more than half a wavelength can be maintained. This latter condition is also promoted by the coexistence of fine fractions and fillers. 'between the fibrils of the finished paper.
Teknik för att uppnå ändamålet med uppfinningen Det är väsentligt för ändamålet att fibrillerna har en viss styvhet, så att ytspänningskraften inte kan åstadkomma allt för mycket optisk kontakt mellan dem vid papperets torkning. Fibrillerna bör därför komma från en mekanisk eller kemimekanisk massa, i vilken fiberväggen. från vilken fibrillerna avskalas, ännu behåller vedens styvhet. kan dock med fördel vara blekt med peroxid, uppfinning främst kommer till användning vid tillverkning av tryckpapper. och dettas ljushet vanligen bör vara hög.Technology for achieving the object of the invention It is essential for the purpose that the fibrils have a certain rigidity, so that the surface tension force cannot cause too much optical contact between them during the drying of the paper. The fibrils should therefore come from a mechanical or chemically mechanical mass in which the fibrous wall. from which the fibrils are peeled, still retains the stiffness of the wood. can, however, advantageously be bleached with peroxide, the invention mainly being used in the manufacture of printing paper. and its brightness should usually be high.
Mekanisk massa för tryckpapper av högre kvalitet till- verkas med en halt finfraktion. som kan överstiga 50%. Man kan dock inte gå allt för långt 1 nedmalningen, eftersom man också behöver långa fibrer, som kan ge papperet erforderlig styrka. Retentionen blir också ett problem vid en mycket hög halt finfraktion.Mechanical pulp for higher quality printing paper is manufactured with a content of fine fraction. which may exceed 50%. However, you can not go too far in the grinding, because you also need long fibers, which can give the paper the required strength. Retention also becomes a problem at a very high content of fine fraction.
Mässan eftersom denna 10 15 20 25 30 455 518 Enligt denna uppfinning sker en separat malning av en del av den använda pappersmassan - andelen kan variera inom vida gränser men ett lämpligt riktvärde kan vara lika delar finfraktion och fyllmedel. Malningsprocessen utformas så att fibrerna i huvudsak nedbryts till fibriller och lameller medan fiberklippning undviks. Sådan malning uppnås bäst vid en koncentration i området 20-50% och med återcirkulering av massan ett antal gånger genom malorganet. Spädning kompen- serar för avdunstningen i malzonen.The fair because this 10 15 20 25 30 455 518 According to this invention a separate grinding of a part of the pulp used takes place - the proportion may vary within wide limits but a suitable guideline value may be equal parts fine fraction and filler. The grinding process is designed so that the fibers are mainly degraded into fibrils and lamellae while fiber cutting is avoided. Such grinding is best achieved at a concentration in the range of 20-50% and with recirculation of the pulp a number of times through the grinding means. Dilution compensates for evaporation in the grinding zone.
Vid en långt gående malning blir massan grund av att vatten binds till de frilagda fiberytorna, och detta gör det svårt att överföra mer energi till massan i 'smörjig“ på malzonen. Detta problem kan mötas genom inblandning av en viss mängd fyllmedel i massan före malningen. styrs efter malresultatet, eftersom en hög inblandning kan medföra alltför mycket fiberklippning.During a long-term grinding, the pulp is due to water being bound to the exposed fiber surfaces, and this makes it difficult to transfer more energy to the pulp in the 'greasy' of the grinding zone. This problem can be met by mixing a certain amount of filler into the pulp before grinding. is controlled by the grinding result, as a high interference can lead to too much fiber cutting.
För malningen kan många nu använda raffinörer komma i Inblandningen fråga. Den enda ändringen jämfört med konventionell teknik är att anordningar måste installeras för återföring av en del av den malda massan och för inblandning av fyllmedel.For the grinding, many now used refiners can come in the Mix question. The only change compared to conventional technology is that devices must be installed for returning a part of the ground mass and for mixing in fillers.
Efter malningen späds massan så långt, att en god bland- ning av massan med det ännu ej inblandade fyllmedlet kan åstadkommas med hjälp av en omrörare i ett mindre massakar.After grinding, the pulp is diluted to such an extent that a good mixing of the pulp with the as yet unmixed filler can be achieved by means of a stirrer in a smaller pulp.
Blandningen finfraktion-fyllmedel pumpas sedan kontinu- erligt till ett annat mindre kar, i vilket en lämplig poly- mer tillsätts för utflockning av fibriller och fyllmedel i blandning.The fine fraction-filler mixture is then continuously pumped to another smaller vessel, in which a suitable polymer is added to flocculate fibrils and fillers in the mixture.
Därpå får den utflockade massan flyta in på ett lämpli- där flockarna avskiljs och fås att falla ned i massan före pappersmaskinen så nära inloppslådan gen roterande filter, som möjligt. 10 15 20 25 30 455 318 Filtratet från filtret, som innehåller huvudparten av den polymer, som inte förbrukats för utflockningen, pumpas tillbaka till utflockningskaret samt används för utspädning av ny polymer. Om koncentrationerna före utflockningskärlet och efter filtret är lika. uppnås balans i systemet.The flocculated pulp is then allowed to flow into a suitable place where the flocks are separated and made to fall into the pulp in front of the paper machine as close to the headbox as a rotating filter, as possible. The filtrate from the filter containing the majority of the polymer not consumed for flocculation is pumped back to the flocculation vessel and used to dilute new polymer. If the concentrations before the flocculation vessel and after the filter are equal. balance is achieved in the system.
Laboratorieundersökningar, som bestyrker patentkraven Fig. mald i den avsedda utsträckningen. Det svarta bandet nedtill 1 visar ett mikrofotografi av mekanisk massa ned- i bilden är 20 mikron långt, medan en vanlig granfiber är 30 och allt, som syns på bilden, kan därför be- tecknas som fibriller och lameller.Laboratory tests, which certify the claims Fig. Ground to the intended extent. The black band at the bottom 1 shows a photomicrograph of mechanical mass - the image is 20 microns long, while an ordinary spruce fiber is 30 and everything that can be seen in the image can therefore be described as fibrils and lamellae.
Pig. 2 visar ett ark tillverkat av lika delar sådan fin- fraktion och fyllmedel. Arket har en mycket jämn men porös mikron bred, struktur och en porvolym av 65%. De flockar av finfraktion och fyllmedel, som beskrivits i denna uppfinning, bör i det färdiga papperet ha samma struktur som det här visade arket och därför verksamt bidraga till papperets opacitet.Pig. 2 shows a sheet made of equal parts such a fine fraction and filler. The sheet has a very even but porous micron width, structure and a pore volume of 65%. The flocculation and filler flocs described in this invention should have the same structure in the finished paper as the sheet shown here and therefore effectively contribute to the opacity of the paper.
Fig. 3 visar fyllmedelsfördelníngen' från översida till undersida i tvâ ark tillverkade av lika delar finfraktion och fyllmedel utflockat med en polymer. Bilden demonstrerar att fyllmedelspartiklarna i dessa flockar är så fast bundna, att de behåller sin position i arket under dettas avvatt- ning, pressning och torkning. fibrillerna i och slipmassa Fig. 4 visar tjockleksfördelningen hos (TMP) (GWD). Det är sådana tunna trådar, som bäst åstadkommer den önskade fördelningen och fixeringen av fyllmedelspartiklarna finfraktion från termomekanisk massa vid utflockningen.Fig. 3 shows the filler distribution 'from top to bottom in two sheets made of equal parts fine fraction and filler flocked with a polymer. The picture demonstrates that the filler particles in these flocks are so tightly bound that they retain their position in the sheet during its dewatering, pressing and drying. the fibrils in and abrasive mass Fig. 4 shows the thickness distribution of (TMP) (GWD). It is such thin threads that best achieve the desired distribution and fixation of the filler particles fine fraction from thermomechanical pulp during flocculation.
Fig. 5 visar sedimentkoncentrationen hos nâgra olika blandningar av finfraktion och fyllmedel. Den i särklass lägsta sedimentkoncentrationen erhölls vid det förfarande, som föresprâkas i denna uppfinning, dvs. den mest voluminösa flocken bildades. ' 10 455 318 Fig. torium, 6 visar resultat från retentionsstudier på labora- varvid man har jämfört arkformning på vanligt sätt med tillsats av polymeren till massan efter fyllmedelsin- blandningen och arkformning på sätt, som beskrivits i denna uppfinning efter samfällning av en blandning av finfraktion och fyllmedel. Den senare metoden representeras av den övre kurvan.Fig. 5 shows the sediment concentration of some different mixtures of fine fraction and filler. By far the lowest sediment concentration was obtained in the process advocated in this invention, i.e. the most voluminous flock was formed. Fig. Thorium, 6 shows results from retention studies in the laboratory comparing sheet forming in the usual way with adding the polymer to the pulp after the filler mixture and sheet forming in the manner described in this invention after precipitation of a mixture of fine fraction and filler. The latter method is represented by the upper curve.
Bilden visar att en polymerförbrukning av 150 g/ton massa vid normal papperstillverkning gav samma retention som en polymerförbrukning av endast 60 g/ton vid samfällning av finfraktion och fyllmedel.The picture shows that a polymer consumption of 150 g / ton pulp during normal papermaking gave the same retention as a polymer consumption of only 60 g / ton when precipitation of fine fraction and filler.
Claims (3)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8500162A SE455318B (en) | 1985-01-15 | 1985-01-15 | SET OF PAPER CONTAINING CLAY OR OTHER FILLERS |
DE19853590715 DE3590715T1 (en) | 1985-01-15 | 1985-12-10 | |
DE19853590715 DE3590715C2 (en) | 1985-01-15 | 1985-12-10 | |
GB08622077A GB2181464B (en) | 1985-01-15 | 1985-12-10 | Process for manufacture of paper holding clay or other fillers |
PCT/SE1985/000514 WO1986004370A1 (en) | 1985-01-15 | 1985-12-10 | Process for manufacture of paper holding clay or other fillers |
EP19860900327 EP0209538B1 (en) | 1985-01-15 | 1985-12-10 | Process for manufacture of paper holding clay or other fillers |
FI863682A FI80742C (en) | 1985-01-15 | 1986-09-11 | SAETT FOER FRAMSTAELLNING AV PAPPER INNEHAOLLANDE LERA ELLER ANDRA FYLLMEDEL. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8500162A SE455318B (en) | 1985-01-15 | 1985-01-15 | SET OF PAPER CONTAINING CLAY OR OTHER FILLERS |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8500162D0 SE8500162D0 (en) | 1985-01-15 |
SE8500162L SE8500162L (en) | 1986-07-16 |
SE455318B true SE455318B (en) | 1988-07-04 |
Family
ID=20358763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8500162A SE455318B (en) | 1985-01-15 | 1985-01-15 | SET OF PAPER CONTAINING CLAY OR OTHER FILLERS |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0209538B1 (en) |
DE (2) | DE3590715C2 (en) |
FI (1) | FI80742C (en) |
GB (1) | GB2181464B (en) |
SE (1) | SE455318B (en) |
WO (1) | WO1986004370A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8621680D0 (en) * | 1986-09-09 | 1986-10-15 | Du Pont | Filler compositions |
SE455795B (en) * | 1986-12-03 | 1988-08-08 | Mo Och Domsjoe Ab | PROCEDURE AND DEVICE FOR PREPARING FILLING PAPER |
DE69012821T2 (en) * | 1989-07-24 | 1995-02-16 | Univ Washington | CELL WALL FILLING OF NEVER DRIED CELL FIBER FIBERS. |
FI106140B (en) * | 1997-11-21 | 2000-11-30 | Metsae Serla Oyj | Filler used in papermaking and process for its manufacture |
US6033524A (en) * | 1997-11-24 | 2000-03-07 | Nalco Chemical Company | Selective retention of filling components and improved control of sheet properties by enhancing additive pretreatment |
WO2017054198A1 (en) | 2015-09-30 | 2017-04-06 | Ecolab Usa Inc. | Compositions and methods for treating filler in papermaking |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3141815A (en) * | 1960-07-27 | 1964-07-21 | Nalco Chemical Co | Process of improving inorganic filler retention in paper by addition of ethylene oxide homopolymer |
US3865686A (en) * | 1962-06-27 | 1975-02-11 | Nalco Chemical Co | Method of improving the retention of filler and fiber fines in papermaking processes by using an acrylamide terpolymer |
US3997648A (en) * | 1972-01-03 | 1976-12-14 | Gulf Research & Development Company | Fibril formation process |
IE47019B1 (en) * | 1977-07-12 | 1983-11-30 | Blue Circle Ind Ltd | Producing dispersions of polymeric material and preflocculated fillers for use in papermaking |
GR65316B (en) * | 1978-06-20 | 1980-08-02 | Arjomari Prioux | Method for the preparation of fibrous leaf |
-
1985
- 1985-01-15 SE SE8500162A patent/SE455318B/en not_active IP Right Cessation
- 1985-12-10 EP EP19860900327 patent/EP0209538B1/en not_active Expired - Lifetime
- 1985-12-10 GB GB08622077A patent/GB2181464B/en not_active Expired
- 1985-12-10 WO PCT/SE1985/000514 patent/WO1986004370A1/en active IP Right Grant
- 1985-12-10 DE DE19853590715 patent/DE3590715C2/de not_active Expired - Fee Related
- 1985-12-10 DE DE19853590715 patent/DE3590715T1/de active Pending
-
1986
- 1986-09-11 FI FI863682A patent/FI80742C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB8622077D0 (en) | 1986-10-22 |
DE3590715C2 (en) | 1990-10-18 |
FI863682A (en) | 1986-09-11 |
SE8500162D0 (en) | 1985-01-15 |
WO1986004370A1 (en) | 1986-07-31 |
FI863682A0 (en) | 1986-09-11 |
GB2181464A (en) | 1987-04-23 |
EP0209538B1 (en) | 1990-05-23 |
EP0209538A1 (en) | 1987-01-28 |
DE3590715T1 (en) | 1987-01-29 |
FI80742C (en) | 1990-07-10 |
FI80742B (en) | 1990-03-30 |
GB2181464B (en) | 1988-02-03 |
SE8500162L (en) | 1986-07-16 |
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