RO113577B1 - Process and installation for producing surface treated writing-printing paper - Google Patents
Process and installation for producing surface treated writing-printing paperInfo
- Publication number
- RO113577B1 RO113577B1 RO97-01273A RO9701273A RO113577B1 RO 113577 B1 RO113577 B1 RO 113577B1 RO 9701273 A RO9701273 A RO 9701273A RO 113577 B1 RO113577 B1 RO 113577B1
- Authority
- RO
- Romania
- Prior art keywords
- paper
- printing paper
- paste
- cellulose
- mixture
- Prior art date
Links
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- Paper (AREA)
Abstract
Invenţia se referă la un procedeu de fabricare a hârtiei de scris-tipar, tratată la suprafaţă, din amestec de celuloză de răşinoase şi foioase, care, pentru îmbunătăţirea caracteristicilor de rezistenţă la îmbătrânire şi reducerea consumului de fibră celulozică, constă în dozarea, în amestecul de celuloze, a 20...25% carbonat de calciu natural, ca material de umplere, 0,5...0,8% amidon cationic, pentru mărirea încărcării electropozitive a pastei şi creşterea rezistenţei în stare umedă a hârtiei, 0,005...0,006% agent de nuanţare, obţinându-se o pastă care se trece printr-o moară de egalizare a gradului de măcinare, se sortează, şi în care se introduc 0,15...0,30% agent de încleiere, de preferinţă alchil-dimercetena neutră sau cationică, 0,05...0,08% agent de retenţie, de preferinţă o poliacrilamidă cationică, după care pasta de hârtie rezultată se lansează pe maşina de fabricaţie, în care se efectuează tratarea la suprafaţă a hârtiei, cu 2,5%...4,0% amidon oxidat şi 0,5...0,8% înălbitor optic, procentele fiind raportate la conţinutul total de fibră absolut uscată. Invenţia se referă şi la o instalaţie pentru realizarea procedeului.The invention relates to a process for the production of surface-treated writing and printing paper from a mixture of cellulose and hardwood pulp, which, in order to improve the aging resistance characteristics and reduce the consumption of cellulosic fiber, consists in dosing in the mixture of cellulose 20 ... 25% of natural calcium carbonate, as filler, 0.5 ... 0.8% of cationic starch, to increase the electrophobic load of the paste and to increase the wet strength of the paper, 0.005. .00,006% of the tinting agent, to obtain a paste which is passed through a milling grade equalizing mill, is sorted and in which 0.15-0.3% of a glueing agent preferably 0.01 to 0.08% retention agent, preferably a cationic polyacrylamide, whereupon the resulting paper pulp is launched on the manufacturing machine where the surface treatment is carried out of paper with 2.5% ... 4.0% of oxidized starch and 0.5 ... 0.8% of optical brightener, the percentages being relative to the total dry fiber content. The invention also relates to a plant for carrying out the process.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO97-01273A RO113577B1 (en) | 1997-07-09 | 1997-07-09 | Process and installation for producing surface treated writing-printing paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO97-01273A RO113577B1 (en) | 1997-07-09 | 1997-07-09 | Process and installation for producing surface treated writing-printing paper |
Publications (1)
Publication Number | Publication Date |
---|---|
RO113577B1 true RO113577B1 (en) | 1998-08-28 |
Family
ID=64354292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RO97-01273A RO113577B1 (en) | 1997-07-09 | 1997-07-09 | Process and installation for producing surface treated writing-printing paper |
Country Status (1)
Country | Link |
---|---|
RO (1) | RO113577B1 (en) |
-
1997
- 1997-07-09 RO RO97-01273A patent/RO113577B1/en unknown
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