NZ733360B2 - Process for the production of a coated substrate comprising cellulosic fibres - Google Patents
Process for the production of a coated substrate comprising cellulosic fibresInfo
- Publication number
- NZ733360B2 NZ733360B2 NZ733360A NZ73336015A NZ733360B2 NZ 733360 B2 NZ733360 B2 NZ 733360B2 NZ 733360 A NZ733360 A NZ 733360A NZ 73336015 A NZ73336015 A NZ 73336015A NZ 733360 B2 NZ733360 B2 NZ 733360B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- substrate
- coating
- coating composition
- mfc
- process according
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract 25
- 238000000034 method Methods 0.000 title claims abstract 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract 3
- 239000008199 coating composition Substances 0.000 claims abstract 15
- 239000000835 fiber Substances 0.000 claims abstract 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract 5
- 238000000576 coating method Methods 0.000 claims abstract 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract 4
- 229920002678 cellulose Polymers 0.000 claims abstract 4
- 239000001913 cellulose Substances 0.000 claims abstract 4
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims abstract 3
- 229920002907 Guar gum Polymers 0.000 claims abstract 3
- 229920002125 Sokalan® Polymers 0.000 claims abstract 3
- 229940072056 alginate Drugs 0.000 claims abstract 3
- 235000010443 alginic acid Nutrition 0.000 claims abstract 3
- 229920000615 alginic acid Polymers 0.000 claims abstract 3
- 125000000129 anionic group Chemical group 0.000 claims abstract 3
- 239000000665 guar gum Substances 0.000 claims abstract 3
- 235000010417 guar gum Nutrition 0.000 claims abstract 3
- 229960002154 guar gum Drugs 0.000 claims abstract 3
- 229920002401 polyacrylamide Polymers 0.000 claims abstract 3
- 239000004584 polyacrylic acid Substances 0.000 claims abstract 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract 2
- 239000011248 coating agent Substances 0.000 claims 4
- 238000007756 gravure coating Methods 0.000 claims 2
- 238000005507 spraying Methods 0.000 claims 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 239000001768 carboxy methyl cellulose Substances 0.000 claims 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims 1
- 238000007766 curtain coating Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000007765 extrusion coating Methods 0.000 claims 1
- 238000007755 gap coating Methods 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000005022 packaging material Substances 0.000 claims 1
- 229920000058 polyacrylate Polymers 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 238000007761 roller coating Methods 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
- B32B2037/243—Coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/12—Paper, e.g. cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/42—Applications of coated or impregnated materials
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- 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
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
-
- 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
- D21H23/50—Spraying or projecting
-
- 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
- D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/32—Multi-ply with materials applied between the sheets
Abstract
The present invention relates to process for the production of a coated substrate comprising cellulosic fibres, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibres and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2,,calculated as dry weight of the coating composition, wherein the coating composition comprises: - microfibrillated cellulose (MFC), and - optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM),sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC preparedby CMC- functionalised fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.
Claims (17)
1. Process for the production of a coated substrate comprising cellulosic fibres, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibres and having a dry 5 content of less than 50% by weight; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m and up to and including about 50 g/m , calculated as dry weight of the coating composition, wherein the coating composition comprises: - microfibrillated cellulose (MFC), and 10 - a water retention agent in an amount of at least 3% up to 8.5% by weight, calculated as dry weight and based on the dry weight of the MFC, the water retention agent being selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC 15 prepared from oxidized fibers, MFC prepared by CMC-functionalized fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate.
2. Process according to claim 1, wherein the process further comprises in step i) providing a second substrate comprising cellulosic fibres and having a dry content of 20 less than 50% by weight, and in step iii) attaching the second substrate to the first substrate, such that the coating composition is placed between the first and second substrates, and subsequently mechanically dewatering the attached first and second substrates.
3. Process according to claim 2, wherein the step (ii) further comprises applying the 25 coating composition in an amount of more than 5 g/m and up to and including about 50 g/m , calculated as dry weight of the coating composition, to the second substrate.
4. Process according to any one of the preceding claims, wherein the coating composition comprises the microfibrillated cellulose in an amount of at least 90% by weight, calculated as dry weight.
5. Process according to any one of the preceding claims, wherein the coating 5 composition is applied in step ii) to the first substrate and optionally the second substrate in a total amount of about 10-40 g/m .
6. Process according to any one of the preceding claims, wherein the first substrate, and/or the second substrate when provided, have a dry content of less than 30-40% by weight. 10
7. Process according to any one of the preceding claims, wherein the first substrate, and/or the second substrate when provided, have a dry content of less than 10-30% by weight.
8. Process according to any one of the preceding claims, wherein the water retention agent is CMC. 15
9. Process according to any one of the preceding claims, wherein the coating composition is applied by means of spray coating, roller coating, slot coating, immersion coating, gravure coating and/or reverse direct gravure coating, extrusion coating, curtain coating, rod coating, and/or gap coating or combinations thereof.
10. Process according to claim 9, wherein the coating composition is added by means of 20 spray coating.
11. Process according to any one of the preceding claims, wherein the step of mechanical dewatering comprises pressing.
12. Process according to any one of the preceding claims, wherein after the step iii) the process further comprises a step of: 25 iv) drying the substrate/substrates.
13. Paper or board product comprising a first substrate upon which a coating composition has been applied, wherein the first substrate comprises cellulosic fibres, and wherein the coating composition comprises: - microfibrillated cellulose (MFC), and - a water retention agent in an amount of at least 3% up to about 8.5% by weight, calculated as dry weight and based on the dry weight of the MFC selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium 5 polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by
CMC-functionalized fibers, and/or combinations thereof; wherein the coating composition has been applied in an amount of more than 5 g/m and up to and including about 50 g/m . 10 14. Use of the paper or board according to claim 13 as a packaging material for perishable goods and/or healthcare products.
15. The process of any one of claims 1-12 substantially as herein described and with reference to any example thereof and with or without reference to the figures. 15
16. The product of claim 13 substantially as herein described and with reference to any example thereof and with or without reference to the figures.
17. The use of claim 14 substantially as herein described and with reference to any example thereof and with or without reference to the figures.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1451581A SE539366C2 (en) | 2014-12-18 | 2014-12-18 | Process for the production of paper or board coated with a coating comprising microfibrillated cellulose and a water retention agent |
| PCT/IB2015/059579 WO2016097964A1 (en) | 2014-12-18 | 2015-12-14 | Process for the production of a coated substrate comprising cellulosic fibres |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ733360A NZ733360A (en) | 2023-12-22 |
| NZ733360B2 true NZ733360B2 (en) | 2024-03-26 |
Family
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