WO2006027632A2 - Method for surface treating corrugated base papers - Google Patents
Method for surface treating corrugated base papers Download PDFInfo
- Publication number
- WO2006027632A2 WO2006027632A2 PCT/HU2005/000096 HU2005000096W WO2006027632A2 WO 2006027632 A2 WO2006027632 A2 WO 2006027632A2 HU 2005000096 W HU2005000096 W HU 2005000096W WO 2006027632 A2 WO2006027632 A2 WO 2006027632A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- surface treating
- paper
- weight
- starch
- sprayed
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 229920002472 Starch Polymers 0.000 claims abstract description 17
- 235000019698 starch Nutrition 0.000 claims abstract description 16
- 239000008107 starch Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 238000009472 formulation Methods 0.000 claims abstract description 11
- 229920001732 Lignosulfonate Polymers 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 5
- 238000004513 sizing Methods 0.000 description 8
- 239000007921 spray Substances 0.000 description 8
- 238000004381 surface treatment Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000010893 paper waste Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
-
- 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
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/24—Addition to the formed paper during paper manufacture
- D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the 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
- 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
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/23—Lignins
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
Abstract
The invention relates to a method for surface treating corrugated base papers by applying surface treating agents on the surface in order to. increase strength. A surface treating formulation, comprising a composition containing 50 to 99 parts per weight lignosulf onate from pulp mills and 1 to 50 parts per weight additives (based on dry-weight) - the surface treating formulation contains at least 5 parts weight of the said composition - and starch; or a lignosulfonate composition without starch is sprayed in a predetermined g/m2 amount, uniformly distributed on the surface, in the dryer section, preferably in the last third of the dryer section of a paper machine.
Description
METHOD FOR SURFACE TREATING CORRUGATED BASE PAPERS
The invention relates to a method for surface treating corrugated base papers, particularly, for applying surface treating agents on the surface in order to increase strength.
It is known that during the last years waste materials have been extensively recycled on many areas. Obviously, it has several advantages; namely, on one hand, it facilitates decreasing the further pollution of the overcharged environment, on the other hand, the secondary use of base materials and/or energy is economically advantageous.
This trend has emerged also in the paper industry; the use of waste paper instead of primary fibres (semi- cellulose, cellulose) is ever increasing. Several manufacturers use only waste paper in their production processes. However, certain properties of the paper products manufactured from waste papers, which are collected, processed (chemically and mechanically) and used several times, gradually deteriorate. This is especially true for the strength properties. In case of various products, e.g. corrugated base papers, the appropriate strength is of premium importance.
It is well known in the art that corrugated base papers are often treated in order to increase their strength.
It is also known that in the paper dryer section of the manufacturing process a sizing press is applied in modern paper machines producing corrugated base paper. The sizing presses can be used for surface treating papers.
The paper strength is increased by surface treatment, and in the art starch is widespreadly used for treating the surface. For this purpose oxidized or enzymatically
decomposed starches of plant origin are used which can be applied on the paper surface with the sizing press in the dryer section. The use of starch increases the number hydrogen bridges between fibres which in turn increase the strength of corrugated base papers.
Though the starch used for surface treatment increases strength, it cannot impart enough stiffness (CMT, SCT, etc.) to corrugated base papers. Therefore, a surface treatment is needed which further increases the paper strength.
Further, it is known that Hungarian patent No. 215 679 describes a composition for corrugated boards which can be applied on the paper surface, together with starch, with the sizing press — i.e. in the paper dryer section of the paper machine - and which contains 50 to 99 parts per weight lignosulfonate (black liquor) from pulp mills and 1 to 50 parts per weight additives (based on dry weight) . The mentioned additive contains a mixture of sodium chloride and urea or sodium chloride or urea. According to the patent mentioned above, the composition is especially- useful for increasing the CMT value (the resistance (measured in N) of the corrugated base paper sheet against the maximal compression force acting perpendicularly to the plane of the sample, Hungarian standard MSZ 5664-77) and the rupture strength. For brevity, hereinafter this composition is referred to as LIQUWELL.
LIQUWELL is a remarkable improvement as compared with starch, however, the strength properties of paper should be preferably further improved in various uses. We have also found (Hungarian patent application No. P0400410) that if a surface treating agent, which contains the starch and LIQUWELL in the proper ratio and concentration, is used then these two components show a
synergetic effect and the strength and stiffness of the paper unexpectedly increase. So, the CMT value and SCT value (test of short span compressive strength, Hungarian standard MSZ ISO-150-9895) can be considerably increased and the rupture strength can be also improved. According to our observations, the starch strengthens the fibre-to-fibre connections and LIQUWELL imparts stiffness to the upper layers of the paper. This synergism could not be predicted by experts . On the other hand, it is also known that sometimes spray methods are used in paper industry. Known spray methods in paper industry, particularly in manufacturing corrugated base papers, are as follows.
The starch is applied in the dryer section, however, when it is sprayed, it can be applied also in the sieve section. In order to adjust the humidity profile, water is sprayed in the dryer section.
In connection with LIQUWELL and the composition according to the said Hungarian patent application, spray methods were not mentioned; the traditional methods for applying surface treating agents in paper industry were used, i.e. they were applied on the surface with the sizing press. However, this method did not allow the application of surface treating agents with a higher dry material content, so a large amount of water had to be evaporated during the drying process at the expense of economy.
Therefore, the object of the invention is to provide a method for applying the surface treating agent (LIQUWELL or the composition containing LIQUWELL + starch) with higher dry material content.
Surprisingly, it has been found that spraying the said surface treating agents on the surface in the dryer section, particularly in its last third, unexpectedly
allows the use of surface treating agents with 20 to 30%, by weight, dry material content, contrary to the usual surface treatment on the sizing press. Further, it has been found that the application of at most 2 g/m2 surface treating agent per side is enough when both sides of the paper are treated. In this way, the applied amount can be controlled: the amount of the absorbed surface treating agent does not determined by the absorbance of the paper, instead, it can be controlled by adjusting the spray process. Further, it is extremely advantageous that overwetting can be avoided according to the invention, therefore, a remarkable drying energy can be saved.
A change of attitude needed in the art to develop the method according to the invention since the drying in the dryer section is not considered as the final operation of the manufacturing method of the final product but as a part of the production process where, instead of obtaining the final product, a step leading to a substantial change of the treated semi-finished product is carried out. During the method according to the invention, the usual spraying of water in the dryer section can also be omitted.
Thus, the invention relates to a method for spraying a surface treating formulation, comprising a composition containing 50 to 99 parts per weight lignosulfonate from pulp mills and 1 to 50 parts per weight additives (based on dry weight) - the surface treating formulation contains at least 5 parts weight of the said composition - and starch; or a lignosulfonate composition without starch, in a predetermined g/m2 amount, uniformly distributed, in the dryer section, preferably in the last third of the dryer section of a paper machine.
Preferably, the density of the sprayed formulation is 20 to 30%, by weight.
The formulation is sprayed on one or optionally both surfaces of the treated paper. About 2 g/m2 of surface treating agent is applied if both sides are sprayed.
Further, the method according to the invention can also be used for treating finished corrugated base papers; then the spraying step according to the invention is used to apply the surface treating agent - optionally on a sheet machine - in the same way as it is used as a part of the manufacturing process.
The embodiment of the invention is illustrated with the following examples, however, the invention is not limited to them.
Example 1 Spray surface treatment on a paper machine manufacturing- 105 g/m2 Wellenstoff
The treatment is carried out on a paper machine, in the last third of the dryer section.
Table I
The LIQUWELL-starch mixture is sprayed according to the parameters shown in Table II .
Table II
The amount of water - applied in the usual surface treatment with sizing press and in the spray surface treating method according to Example 2 - is shown in Table III.
Table III
The spray surface treatment requires to add a tank, a pump and a filter equipment to the paper machine. Preferably, spraying is carried out with a series of sprayers containing several nozzles in order to replace an occasionally failed nozzle. Overlapping of the areas sprayed by the individual nozzles is not allowed. The spray should be uniform, therefore, precision nozzles should be used.
If the paper occasionally tears, the spraying is stopped or it stops automatically when appropriate sensing elements and accessories are used, and a wash is carried out with water. However, it should be mentioned that while the paper can easily tear in case of the sizing press method, this hardly occurs when the method according to the invention is used since the apparatus does not touch the paper surface and the paper cannot wet through.
Advantageously, there is a vacuum chamber around the sprayer to prevent the sprayed surface treating agents from getting into the air.
Claims
1. Method for surface treating corrugated base papers by applying surface treating agents on the surface in order to increase strength where a surface treating formulation, comprising a composition containing 50 to 99 parts per weight lignosulfonate from pulp mills and 1 to 50 parts per weight additives (based on dry weight) - the surface treating formulation contains at least 5 parts weight of the said composition - and starch; or a lignosulfonate composition without starch is sprayed in a predetermined g/m2 amount, uniformly distributed on the surface, in the dryer section, preferably in the last third of the dryer section of a paper machine.
2. The method according to Claim 1, where the density of the sprayed formulation is 20 to 30%, by weight.
3. The method according to Claim 1, where the formulation is sprayed on one or both surfaces of the treated paper.
4. The method according to Claim 1 and Claim 3, where the formulation is sprayed on both surfaces of the treated paper and about 2 g/m2 surface treating agent is applied.
5. The method according to Claim 1, where finished corrugated base papers are surface treated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUP0401826 | 2004-09-08 | ||
| HU0401826A HU226097B1 (en) | 2004-09-08 | 2004-09-08 | Method for surface treating of corrugated base papers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2006027632A2 true WO2006027632A2 (en) | 2006-03-16 |
| WO2006027632A3 WO2006027632A3 (en) | 2006-06-15 |
Family
ID=89985486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/HU2005/000096 WO2006027632A2 (en) | 2004-09-08 | 2005-09-07 | Method for surface treating corrugated base papers |
Country Status (2)
| Country | Link |
|---|---|
| HU (1) | HU226097B1 (en) |
| WO (1) | WO2006027632A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011057044A2 (en) | 2009-11-06 | 2011-05-12 | Hercules Incorporated | Surface application of polymers and polymer mixtures to improve paper strength |
| WO2012061305A1 (en) | 2010-11-05 | 2012-05-10 | Hercules Incorporated | Surface application of polymers to improve paper strength |
| WO2022129653A1 (en) | 2020-12-18 | 2022-06-23 | Consejo Superior De Investigaciones Cientificas (Csic) | Method for obtaining reinforced packaging paper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3644167A (en) * | 1969-07-14 | 1972-02-22 | Georgia Pacific Corp | Preparation of corrugating linerboard |
| US5338404A (en) * | 1992-03-11 | 1994-08-16 | International Paper Company | Method of forming a lignin reinforced cellulosic product |
| US5753078A (en) * | 1996-06-07 | 1998-05-19 | Cartons St-Laurent, Inc./St. Laurent Paperboard, Inc. | Method of making surface coated or impregnated paper or paperboard |
| US20020084045A1 (en) * | 1998-11-12 | 2002-07-04 | Dimitris Ioannis Collias | Compositions for improving physical strength properties and humidity resistance of paper products |
| WO2005078191A2 (en) * | 2004-02-11 | 2005-08-25 | Technofill Kereskedelmi És Szolgáltató Kft. | Method for surface treating corrugated base papers in order to increase strenght |
-
2004
- 2004-09-08 HU HU0401826A patent/HU226097B1/en unknown
-
2005
- 2005-09-07 WO PCT/HU2005/000096 patent/WO2006027632A2/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3644167A (en) * | 1969-07-14 | 1972-02-22 | Georgia Pacific Corp | Preparation of corrugating linerboard |
| US5338404A (en) * | 1992-03-11 | 1994-08-16 | International Paper Company | Method of forming a lignin reinforced cellulosic product |
| US5753078A (en) * | 1996-06-07 | 1998-05-19 | Cartons St-Laurent, Inc./St. Laurent Paperboard, Inc. | Method of making surface coated or impregnated paper or paperboard |
| US20020084045A1 (en) * | 1998-11-12 | 2002-07-04 | Dimitris Ioannis Collias | Compositions for improving physical strength properties and humidity resistance of paper products |
| WO2005078191A2 (en) * | 2004-02-11 | 2005-08-25 | Technofill Kereskedelmi És Szolgáltató Kft. | Method for surface treating corrugated base papers in order to increase strenght |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011057044A2 (en) | 2009-11-06 | 2011-05-12 | Hercules Incorporated | Surface application of polymers and polymer mixtures to improve paper strength |
| US8696869B2 (en) | 2009-11-06 | 2014-04-15 | Hercules Incorporated | Surface application of polymers and polymer mixtures to improve paper strength |
| WO2012061305A1 (en) | 2010-11-05 | 2012-05-10 | Hercules Incorporated | Surface application of polymers to improve paper strength |
| US8900412B2 (en) | 2010-11-05 | 2014-12-02 | Solenis Technologies Cayman, L.P. | Surface application of polymers to improve paper strength |
| WO2022129653A1 (en) | 2020-12-18 | 2022-06-23 | Consejo Superior De Investigaciones Cientificas (Csic) | Method for obtaining reinforced packaging paper |
Also Published As
| Publication number | Publication date |
|---|---|
| HUP0401826A2 (en) | 2006-02-28 |
| WO2006027632A3 (en) | 2006-06-15 |
| HU226097B1 (en) | 2008-04-28 |
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