CA2206899C - Procedure for the manufacture of paper - Google Patents
Procedure for the manufacture of paper Download PDFInfo
- Publication number
- CA2206899C CA2206899C CA 2206899 CA2206899A CA2206899C CA 2206899 C CA2206899 C CA 2206899C CA 2206899 CA2206899 CA 2206899 CA 2206899 A CA2206899 A CA 2206899A CA 2206899 C CA2206899 C CA 2206899C
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- procedure
- paper
- binding agent
- mechanical pulp
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 239000011230 binding agent Substances 0.000 claims abstract description 41
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 33
- 238000005265 energy consumption Methods 0.000 claims description 2
- 239000000306 component Substances 0.000 abstract 5
- 239000000123 paper Substances 0.000 description 25
- 238000007670 refining Methods 0.000 description 9
- 229920002472 Starch Polymers 0.000 description 6
- 235000019698 starch Nutrition 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 galacto man-nones Polymers 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000005017 polysaccharide Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229920000881 Modified starch Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019426 modified starch Nutrition 0.000 description 2
- 229920001277 pectin Polymers 0.000 description 2
- BNLDYUJJDMUOPZ-HUFXEGEASA-N (6r,7r)-7-[[2-amino-2-(cyclohexen-1-yl)acetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Chemical compound N([C@H]1[C@@H]2N(C1=O)C(=C(CS2)C)C(O)=O)C(=O)C(N)C1=CCCCC1 BNLDYUJJDMUOPZ-HUFXEGEASA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000001856 Ethyl cellulose Chemical class 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical class CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Chemical class 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Chemical class 0.000 description 1
- 229920000161 Locust bean gum Polymers 0.000 description 1
- 244000273256 Phragmites communis Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 235000015125 Sterculia urens Nutrition 0.000 description 1
- 240000001058 Sterculia urens Species 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000001785 acacia senegal l. willd gum Substances 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000420 anogeissus latifolia wall. gum Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000019314 gum ghatti Nutrition 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
A procedure for the manufacture of paper, in which procedure at least one mechanical pulp compo-nent, binding agent and other components are mixed so as to form paper pulp, the paper pulp is made into a web and the web is dried. According to the invention, the mechanical pulp component and the binding agent are mixed together and the other components are mixed with the mechanical pulp component after it has been mixed with the binding agent.
Description
PROCEDURE FOR THE MANUFACTURE OF PAPER
The present invention relates to a procedure for the manufacture of paper, in which procedure at least one mechanical pulp component, a binding agent and other components are mixed to form paper pulp, the paper pulp is made into a web and the web is dried and, if desired, finished.
In the present application, 'paper' refers to web-like products generally produced by means of a pa-per or cardboard machine and containing cellulose fib-res and/or lignocellulose fibres, products which are either coated or uncoated, thinner or thicker, consis-ting of one or more layers, and which are generally called paper or cardboard.
The present patent application does not con-tain a more detailed description of the formation of a paper web from paper pulp in a paper machine, the dry-ing of the web or the possible finishing; as for these matters, reference is made to the methods generally known in the industry and to relevant literature.
The quality requirements regarding different paper sorts are continuously growing. In the case of printing paper, excessively fast drying of the prin-ting ink may result in a rough paper surface and the formation of steam bubbles, which may lead to cracking of the paper while the surface remains undamaged- This problem is encountered especially when the z-strength or internal bond strength of the paper is too low. The problem is particularly difficult in the case of paper that has been manufactured using a high-intensity for-mer for web formation.
As for the features characteristic of the in-vention, reference is made to the claims.
The invention is based on research work in which it was established that the internal bond strength of paper can be increased by mixing a mecha-nical pulp component and a binding agent together and adding the other pulp components to this mixture at a later stage.
Particularly good results have been reached by postrefining the mechanical pulp component and mi-xing the binding agent into the postrefined mechanical pulp component.
Similarly, very good results have been reached by performing the postrefining of the mechani-cal pulp component after the binding agent has been added to it.
The invention allow2 the binding agent to spread uniformly into the mechanical pulp component and get bound with it. At the same time, when postre-fining is employed, there appear in the pulp component new fibre surfaces, to which the binding agenz can ef-fectively adhere-The postrefining is done at a desired pulp consistency, e.g. over 210, and for high-consistency pulps up to 45 a; thus, the refining can preferably be implemented at a consistency of e.g. 3 - 18 %.
The energy consumption in postrefining may vary within broad limits and is e.g. 10 - 100 kWh/ton, preferably e.g. of the order of 10 - 20 - 70 kWh/ton.
- In the procedure of the invention, the postrefining can be performed using any type of pulp refiner, as is generally known in paper and pulp technology.
The mechanical pulp used is any kind of mechanical pulp, e.g. groundwood, refiner groundwood or recycled pulp containing groundwood and/or refiner groundwood or a mixture of these in arbitrary propor-tions. The pulp used in making printing paper, to which the invention appertains in particular, is gene-rally pulp defibrated, sortad and bleached in a known manner The mechanical pulp may be.=produced from any sort of wood, stalked plants or in general from any vegetable fibre, e.g. broad-leaved trees, coniferous trees, straw, reeds, etc.
Paper produced according to the invention may contain mechanical pulp in arbitrary proportions as is generally known in paper industry, e.g. 10 - 80 wt-%, usually 20 - 60 wt-a.
The proportion of binding agent added into the mechanical pulp may be as is ganerally known in paper industry, e.g. 2 - 3 a, even more, e.g. up to 5 a. The binding agent may be any binding agent commonly used in paper industry. The binding agent may be e.g.
selected from groups starch derivatives, galacto man-nones, cellulose derivatives, acryl amides, different types of polymeric dispersions (i.e. latexes), etc.
The binding agents may be non-ionic, anionic or catio-nic. Accordingly e-g. following binding agents are mentioned: natural xanthan gums, such as arabic gum, ghatti gum, pectin, dragacanth, karaya, alagin, gua-rar, guarin, carubin or other non-modified or modified anionic or cationic polysaccharide compounds; amylo-pectines and other starch derivatives and starches;
CMC, ethylcellulose, hydroxyethylcellulose and other cellulose derivatives; modified cationic or anionic or non-ionic binding agents, as are generally known in paper industry (e.g. US patent 5104487).
Moreover, the paper pulp may contain any ot-her known additives, such as fillers, agents improving a certain property or certain properties of paper, co-lorants, pigments, etc., as is known in ihe art.
In the following, the invention is described in detail by the aid of a few examples of its embodi-ments, reference being made to Fig. 1, which repre-sents the Scott-bond strength of paper produced using different binding agents and different mixing methods.
Example 1 This experiment was carried out to study the effect of the binding agent on the properties of paper manufactured from hardwood mechanical pulp when the binder was added, to non-postrefined pulp, the binder and Lhe pulp were postrefined together or when the binder was added to postrefined pulp. The pulp used had been bleached with hydrogen peroxide, dosed at 1.0 a.
Postrefining was performed using a EW labora-tory refiner, SCE 100 kWh/ton. When the binder was ad-ded before the refining, the chemical was added into the pulp, the pulp was mixed for 25 min. and analysed, the pulp was refined, mixed for 25 mi.n. and analysed.
When the chemical was added after the refining, the pulp was mixed for 25 min., the pulp was refined, the binding agent was added into the pulp, the pulp was mixed for 25 min. and then analysed.
The chemicals used were starch, 2 a; CMC, 0.5 a; and modified polysaccharide, 2 a_ The experiment also included a 50-min. mixing time with modified po-lysaccharide. In addition, a 0-test without a binder and postrefining without a binder were carried out.
The results are shown in Table 1.
Table 1 Scott-bond J/m2 No binder 1 148 Mixing time 25 min_ 2 231 "
Starch 1 385 3 482 "
Modified 1 339 Polysaccharide 2 408 0.5 0 2 216 '5 Modified Poly- 1 346 saccharide 2 % 3 417 In the table, denotation 1 means binder ad-ded, no refining; 2 means binder added and refined to-gether with the pulp component; and 3 means binder ad-ded afLer the refining. The reaults are also shown in a graphic format in Fig. 1.
According to the test results, mixing the binding agent in postrefined pulp or postrefining the pulp after the mixing clearly increased the bond atrength of paper produced from the pulp.
Example 2 This experiment was carried out to study the effect of the poztrefining power on the properties of paper produced from the pulp. Pulp prepared in a man-ner corresponding to Example 1 was used in the experi-ment, the postrefiriing power levels (PR SCE) were 0, 50 and 75 kWh/ton. The mixing times were 0, 20 min., 40 min. and 60 min. The additive used was modified po-lysaccharide, 2 %. The refining was performed using an industrial-scale refiner.
The bond strength values of paper produced from the pulp are shown in Table 2-Table 2 Pulp 1 1 1 2 2 2 2 2 2 Binder None None None None 2% 2% 20 2% 2~
Mixing time/min 0 0 0 0 20 40 60 60 60 PR SCE/
kWh/ton 0 50 75 0 0 0 0 50 75 Bond Strength 203 277 305 195 315 301 307 391 506 Example 3 This experiment was carried out to study as a laboratory test the effect of binding agent on pulp when the binding agent was added after the refining treatment. In addition, the use of starch at two dos-age levels was tested. The table shows as a reference the results of a pilot test carried out with the same pulp; in this test, the chemical was added before the postrefining. The pulp used had been produced in a manner corresponding to Examples 1 and 2.
The results are shown in Table 3.
Table 3 Laboratory test Pilot test Additions of binding agent Refin.+ Refin.
1.5a 2.0'0~- 2.0% chem. ref.
starch starch mod. polys-Bond J/m2 450 449 489 482 271 Tensile Index Nm/g 41.3 41.0 43.6 38.3 36.3 According to the test results, adding the binding agent after the refining increased the bond strength and tensile index of a paper sheet made from the pulp even more than adding it in conjunction with the refining.
The embodiment examples are only intended to illustrate the invention without limiting it in any way, and the embodiments may vary within the scope of the claims presented below.
The present invention relates to a procedure for the manufacture of paper, in which procedure at least one mechanical pulp component, a binding agent and other components are mixed to form paper pulp, the paper pulp is made into a web and the web is dried and, if desired, finished.
In the present application, 'paper' refers to web-like products generally produced by means of a pa-per or cardboard machine and containing cellulose fib-res and/or lignocellulose fibres, products which are either coated or uncoated, thinner or thicker, consis-ting of one or more layers, and which are generally called paper or cardboard.
The present patent application does not con-tain a more detailed description of the formation of a paper web from paper pulp in a paper machine, the dry-ing of the web or the possible finishing; as for these matters, reference is made to the methods generally known in the industry and to relevant literature.
The quality requirements regarding different paper sorts are continuously growing. In the case of printing paper, excessively fast drying of the prin-ting ink may result in a rough paper surface and the formation of steam bubbles, which may lead to cracking of the paper while the surface remains undamaged- This problem is encountered especially when the z-strength or internal bond strength of the paper is too low. The problem is particularly difficult in the case of paper that has been manufactured using a high-intensity for-mer for web formation.
As for the features characteristic of the in-vention, reference is made to the claims.
The invention is based on research work in which it was established that the internal bond strength of paper can be increased by mixing a mecha-nical pulp component and a binding agent together and adding the other pulp components to this mixture at a later stage.
Particularly good results have been reached by postrefining the mechanical pulp component and mi-xing the binding agent into the postrefined mechanical pulp component.
Similarly, very good results have been reached by performing the postrefining of the mechani-cal pulp component after the binding agent has been added to it.
The invention allow2 the binding agent to spread uniformly into the mechanical pulp component and get bound with it. At the same time, when postre-fining is employed, there appear in the pulp component new fibre surfaces, to which the binding agenz can ef-fectively adhere-The postrefining is done at a desired pulp consistency, e.g. over 210, and for high-consistency pulps up to 45 a; thus, the refining can preferably be implemented at a consistency of e.g. 3 - 18 %.
The energy consumption in postrefining may vary within broad limits and is e.g. 10 - 100 kWh/ton, preferably e.g. of the order of 10 - 20 - 70 kWh/ton.
- In the procedure of the invention, the postrefining can be performed using any type of pulp refiner, as is generally known in paper and pulp technology.
The mechanical pulp used is any kind of mechanical pulp, e.g. groundwood, refiner groundwood or recycled pulp containing groundwood and/or refiner groundwood or a mixture of these in arbitrary propor-tions. The pulp used in making printing paper, to which the invention appertains in particular, is gene-rally pulp defibrated, sortad and bleached in a known manner The mechanical pulp may be.=produced from any sort of wood, stalked plants or in general from any vegetable fibre, e.g. broad-leaved trees, coniferous trees, straw, reeds, etc.
Paper produced according to the invention may contain mechanical pulp in arbitrary proportions as is generally known in paper industry, e.g. 10 - 80 wt-%, usually 20 - 60 wt-a.
The proportion of binding agent added into the mechanical pulp may be as is ganerally known in paper industry, e.g. 2 - 3 a, even more, e.g. up to 5 a. The binding agent may be any binding agent commonly used in paper industry. The binding agent may be e.g.
selected from groups starch derivatives, galacto man-nones, cellulose derivatives, acryl amides, different types of polymeric dispersions (i.e. latexes), etc.
The binding agents may be non-ionic, anionic or catio-nic. Accordingly e-g. following binding agents are mentioned: natural xanthan gums, such as arabic gum, ghatti gum, pectin, dragacanth, karaya, alagin, gua-rar, guarin, carubin or other non-modified or modified anionic or cationic polysaccharide compounds; amylo-pectines and other starch derivatives and starches;
CMC, ethylcellulose, hydroxyethylcellulose and other cellulose derivatives; modified cationic or anionic or non-ionic binding agents, as are generally known in paper industry (e.g. US patent 5104487).
Moreover, the paper pulp may contain any ot-her known additives, such as fillers, agents improving a certain property or certain properties of paper, co-lorants, pigments, etc., as is known in ihe art.
In the following, the invention is described in detail by the aid of a few examples of its embodi-ments, reference being made to Fig. 1, which repre-sents the Scott-bond strength of paper produced using different binding agents and different mixing methods.
Example 1 This experiment was carried out to study the effect of the binding agent on the properties of paper manufactured from hardwood mechanical pulp when the binder was added, to non-postrefined pulp, the binder and Lhe pulp were postrefined together or when the binder was added to postrefined pulp. The pulp used had been bleached with hydrogen peroxide, dosed at 1.0 a.
Postrefining was performed using a EW labora-tory refiner, SCE 100 kWh/ton. When the binder was ad-ded before the refining, the chemical was added into the pulp, the pulp was mixed for 25 min. and analysed, the pulp was refined, mixed for 25 mi.n. and analysed.
When the chemical was added after the refining, the pulp was mixed for 25 min., the pulp was refined, the binding agent was added into the pulp, the pulp was mixed for 25 min. and then analysed.
The chemicals used were starch, 2 a; CMC, 0.5 a; and modified polysaccharide, 2 a_ The experiment also included a 50-min. mixing time with modified po-lysaccharide. In addition, a 0-test without a binder and postrefining without a binder were carried out.
The results are shown in Table 1.
Table 1 Scott-bond J/m2 No binder 1 148 Mixing time 25 min_ 2 231 "
Starch 1 385 3 482 "
Modified 1 339 Polysaccharide 2 408 0.5 0 2 216 '5 Modified Poly- 1 346 saccharide 2 % 3 417 In the table, denotation 1 means binder ad-ded, no refining; 2 means binder added and refined to-gether with the pulp component; and 3 means binder ad-ded afLer the refining. The reaults are also shown in a graphic format in Fig. 1.
According to the test results, mixing the binding agent in postrefined pulp or postrefining the pulp after the mixing clearly increased the bond atrength of paper produced from the pulp.
Example 2 This experiment was carried out to study the effect of the poztrefining power on the properties of paper produced from the pulp. Pulp prepared in a man-ner corresponding to Example 1 was used in the experi-ment, the postrefiriing power levels (PR SCE) were 0, 50 and 75 kWh/ton. The mixing times were 0, 20 min., 40 min. and 60 min. The additive used was modified po-lysaccharide, 2 %. The refining was performed using an industrial-scale refiner.
The bond strength values of paper produced from the pulp are shown in Table 2-Table 2 Pulp 1 1 1 2 2 2 2 2 2 Binder None None None None 2% 2% 20 2% 2~
Mixing time/min 0 0 0 0 20 40 60 60 60 PR SCE/
kWh/ton 0 50 75 0 0 0 0 50 75 Bond Strength 203 277 305 195 315 301 307 391 506 Example 3 This experiment was carried out to study as a laboratory test the effect of binding agent on pulp when the binding agent was added after the refining treatment. In addition, the use of starch at two dos-age levels was tested. The table shows as a reference the results of a pilot test carried out with the same pulp; in this test, the chemical was added before the postrefining. The pulp used had been produced in a manner corresponding to Examples 1 and 2.
The results are shown in Table 3.
Table 3 Laboratory test Pilot test Additions of binding agent Refin.+ Refin.
1.5a 2.0'0~- 2.0% chem. ref.
starch starch mod. polys-Bond J/m2 450 449 489 482 271 Tensile Index Nm/g 41.3 41.0 43.6 38.3 36.3 According to the test results, adding the binding agent after the refining increased the bond strength and tensile index of a paper sheet made from the pulp even more than adding it in conjunction with the refining.
The embodiment examples are only intended to illustrate the invention without limiting it in any way, and the embodiments may vary within the scope of the claims presented below.
Claims (11)
1. Procedure for the manufacture of paper, in which procedure at least one mechanical pulp component, a binding agent and other components are mixed so as to form paper pulp, the paper pulp is made into a web and the web is dried; characterized in that the mechanical pulp component and the binding agent are mixed together and the other components are mixed with the mechanical pulp component after it has been mixed with the binding agent.
2. Procedure as defined in claim 1, characterized in that the mechanical pulp component is postrefined prior to mixing with the binding agent.
3. Procedure as defined in claim 1, characterized in that the mechanical pulp component is postrefined together with the binding agent.
4. Procedure as defined in claim 2 or 3, characterized in that the postrefining is performed at a consistency of 2 to 45%.
5. Procedure as defined in claim 2, 3 or 4, characterized in that the postrefining is performed at a consistency of 3 to 18%.
6. Procedure as defined in any one of claims 2 to 5, characterized in that the energy consumption in the postrefining is 10 to 100 kWh/t.
7. Procedure as defined in any one of claims 1 to 6, characterized in that the mechanical pulp contains components selected from the group consisting of groundwood, refiner groundwood, recycled pulp containing groundwood and recycled pulp containing refiner groundwood.
8 8. Procedure as defined in ay one of claims 1 to 7, characterized in that the amount of mechanical pulp contained in the paper pulp is 10 to 80 wt-%.
9. Procedure as define din any one of claims 1 to 8 characterized in that the amount of mechanical pulp contained in the paper pulp is 25 to 60 weight percentage.
10. Procedure as defined in any one of claims 1 to 9, characterized in that the amount of binding agent contained in the paper pulp is over 0.5%.
11. Procedure as defined in any one of claims 1 to 10 in that the amount of binding agent contained in the paper pulp is in the range of .5 to 3%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FIFI-962701 | 1996-06-28 | ||
| FI962701A FI108240B (en) | 1996-06-28 | 1996-06-28 | Method for making paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2206899A1 CA2206899A1 (en) | 1997-12-28 |
| CA2206899C true CA2206899C (en) | 2007-12-18 |
Family
ID=8546315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2206899 Expired - Fee Related CA2206899C (en) | 1996-06-28 | 1997-06-04 | Procedure for the manufacture of paper |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH1060793A (en) |
| CA (1) | CA2206899C (en) |
| FI (1) | FI108240B (en) |
| ID (1) | ID17502A (en) |
-
1996
- 1996-06-28 FI FI962701A patent/FI108240B/en not_active IP Right Cessation
-
1997
- 1997-06-04 CA CA 2206899 patent/CA2206899C/en not_active Expired - Fee Related
- 1997-06-26 ID IDP972203A patent/ID17502A/en unknown
- 1997-06-30 JP JP18906697A patent/JPH1060793A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ID17502A (en) | 1998-01-08 |
| FI962701A0 (en) | 1996-06-28 |
| JPH1060793A (en) | 1998-03-03 |
| CA2206899A1 (en) | 1997-12-28 |
| FI962701A (en) | 1997-12-29 |
| FI108240B (en) | 2001-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11634863B2 (en) | Method to produce composite-enhanced market pulp and paper | |
| US7497924B2 (en) | Surface treatment with texturized microcrystalline cellulose microfibrils for improved paper and paper board | |
| US7037405B2 (en) | Surface treatment with texturized microcrystalline cellulose microfibrils for improved paper and paper board | |
| EP2396470B1 (en) | A method for producing modified cellulose | |
| FI124464B (en) | Process for the preparation of pulp slurry, pulp slurry and paper | |
| US6736933B2 (en) | Multi-ply cellulosic products using high-bulk cellulosic fibers | |
| US7892613B2 (en) | Reducing top ply basis weight of white top linerboard in paper or paperboard | |
| US3794558A (en) | Loading of paper furnishes with gelatinizable material | |
| US5906894A (en) | Multi-ply cellulosic products using high-bulk cellulosic fibers | |
| CA2852378C (en) | Filler composition and method of producing composite materials | |
| JP2013513037A (en) | Method for manufacturing paper or paperboard products | |
| US20230035105A1 (en) | Surface enhanced pulp fibers at a substrate surface | |
| Zhang et al. | Improvement of high-yield pulp properties by using a small amount of bleached wheat straw pulp | |
| RU2731770C1 (en) | Binder composition based on vegetable fibres and mineral fillers, production and use thereof | |
| CN109183487B (en) | Method for making salt packaging paper | |
| US20160060815A1 (en) | Process for treating cellulose fibres in order to produce a composition comprising microfibrillated cellulose and a composition produced according to the process | |
| CN114934406A (en) | Preparation process of paper barrier material | |
| Huang et al. | Distribution analysis of cellulose nanofibrils in paper handsheets: Dye-labeled Method | |
| JP3067332B2 (en) | Medium coated paper for offset | |
| CA2206899C (en) | Procedure for the manufacture of paper | |
| SK165099A3 (en) | Method for making paper using a gelling system | |
| EP0433413B1 (en) | Porous, micronized, low density vegetable filler with a controlled particle size and low specific physical and hydraulic surfaces, and method of preparation and use of same | |
| JPH0617399A (en) | Base paper for coated paper for printing | |
| Tozluoğlu | Potential Use of Nanofibrillated Cellulose-loaded Cationic Starch Solutions as Coating Formulation for Recycled Fluting Papers. | |
| JPH02293497A (en) | Production of printing paper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130604 |