WO2016138554A1 - A system and process - Google Patents
A system and process Download PDFInfo
- Publication number
- WO2016138554A1 WO2016138554A1 PCT/AU2016/050122 AU2016050122W WO2016138554A1 WO 2016138554 A1 WO2016138554 A1 WO 2016138554A1 AU 2016050122 W AU2016050122 W AU 2016050122W WO 2016138554 A1 WO2016138554 A1 WO 2016138554A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pbl
- paper
- vkf
- fibre
- plasterboard
- Prior art date
Links
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
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/08—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or 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
-
- 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
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- 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
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
- D21H11/04—Kraft or sulfate pulp
-
- 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
- D21H11/14—Secondary 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
-
- 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
- D21H17/62—Rosin; 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
- D21H19/00—Coated paper; Coating material
-
- 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
-
- 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
- D21H21/16—Sizing or water-repelling 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
- 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
-
- 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
- D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/26—All layers being made of paper or paperboard
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/12—Coating on the layer surface on paper layer
-
- 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
- B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
-
- 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
- B32B2307/718—Weight, e.g. weight per square meter
-
- 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
- B32B2307/73—Hydrophobic
-
- 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
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/04—Treatment by energy or chemical effects using liquids, gas or steam
- B32B2310/0409—Treatment by energy or chemical effects using liquids, gas or steam using liquids
-
- 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
- B32B2554/00—Paper of special types, e.g. banknotes
-
- 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
- B32B2607/00—Walls, panels
- B32B2607/02—Wall papers, wall coverings
Definitions
- the present invention relates to a system and process for manufacturing plasterboard liner.
- the plasterboard liner is preferably light weight Kraft based liner paper for the production of plasterboa rd .
- back PBL back plasterboard liner
- plasterboard liner (PBL) has previously had the following characteristics:
- FIG. 2a to 2d A known system for ma nufacturing PBL is shown schematically in Figures 2a to 2d . As shown, the system uses recycled paper fibre (RCF) as the main source of paper fibre. PBL manufactured using a majority of RCF can achieve the necessary end product (plasterboard) market characteristics of: smooth, flat, ripple free surfaces evident by visual inspection ;
- RCF recycled paper fibre
- Additives such as starch, which are used to increase paper tensile strength.
- PBL of weight greater than 150 gsm manufactured using 100% RCF has the advantages of high dimensional stability and tensile strength which is necessary for the subsequent manufacture of plasterboard sheet.
- PBL of weight less than 130 gsm manufactured using 100% RCF is not marketable as it does not meet tensile strength requirements for subsequent plasterboard manufacture.
- PBL with an appreciable content of virgin Kraft fibre is not marketable as it does not meet the dimensional stability requirements for subsequent plasterboard manufacture.
- MD:CD ratio Tensile strength for paper is expressed as MD:CD ratio. This is the ratio of the maximum pulling stress before breaking of the paper sheet in both the machine direction (MD) and the cross direction (CD).
- MD machine direction
- CD cross direction
- a paper sheet fibres oriented in the MD lay in the longitudinal direction of travel of the paper sheet through the paper machine. Fibres oriented in the CD lay perpendicular to the MD.
- Traditional PBL of greater than 150 gsm has a high MD:CD ratio for both back and face PBL. This is because there is sufficient fibre available to allow non-specialised fibre orientation in the PBL compared with general paper making in which the predominant fibre orientation is in the MD.
- Dimensional stability for paper means its resistance to change in size as the result of a change in moisture content.
- Paper fibres have a natural tendency to absorb moisture and hydro expand.
- a measure of dimensional stability is wet expansion, which is the percentage difference between a paper sheet's dry and wet size.
- Traditional PBL of greater than 150 gsm has a high dimensional stability in part because it does not contain an appreciable content of virgin Kraft fibre.
- Cellulose fibre used for paper making is recyclable. However, each time a fibre is recycled, it loses strength until it is no longer able to be used. Typically, a cellulose fibre can be recycled for paper making up to about 8 times.
- Kraft fibre is derived from the Kraft process technology for converting wood into wood pulp and extracting virgin cellulose fibres for paper manufacture.
- Kraft fibre also is used to more broadly refer to cellulose fibres that retain strength similar to that of virgin cellulose fibre and so it can encompass fibres that have been recycled up to about twice. Kraft fibre is stronger than RCF and its inclusion in PBL can allow for reduced weight whilst maintaining the necessary paper tensile strength.
- the inclusion of virgin Kraft fibre in PBL reduces the dimensional stability as virgin Kraft fibre is more reactive in contact with moisture than recycled fibre. This is because the fibre is damaged through each recycle, which reduces its strength and also makes it less reactive to contact with moisture.
- PBL plasterboard liner
- the PBL drying the multi ply paper sheet over drying drums to produce the PBL, wherein the PBL is no more than 140 grams per square meter (gsm) .
- the PBL is no more than 130 grams per square meter (gsm) .
- a Cobb (60 second) value of the PBL is less than 30 gsm.
- a cross direction wet expansion of the PBL is no g reater than 0.8%.
- the step of blending results in multiple fibre blend strea ms each having a substantially even mixture of RCF and VKF.
- the substantially even mixture includes greater than 35% VKF.
- the PBL is for a base of the plasterboard and the process includes the step of manipulating fibres of the fibre blend streams so that a machine direction to cross direction tensile ratio (MD : CD) of the PBL is not more than 1.4.
- MD machine direction to cross direction tensile ratio
- the PBL is for a face of the plasterboard and the process includes the step of manipulating fibres of the fibre blend streams so that a machine direction to cross direction tensile ratio (MD : CD) of the PBL is not less than 2.2.
- the process advantageously includes the step of applying a pigment coating to the face PBL.
- the pigment coating preferably provides a light colour surface with diffuse blue reflectance factor not less than 30.
- the pigment coating preferably provides a light colour surface with diffuse blue reflectance factor not less than 40.
- the present invention also provides plasterboard liner for use in manufacturing plasterboard formed from the above-described process.
- the present invention also provides base plasterboard liner for use in manufacturing plasterboard formed from the above-described process.
- the present invention also provides face plasterboard liner for use in manufacturing plasterboard formed from the above described process.
- the present invention also provides plaster board, including gypsum interposed between the above described face plasterboard liner and the above described base plasterboard liner.
- the present invention also provides a system for manufacturing plasterboa rd liner (PBL) for plaster board, including :
- the PBL is no more than 140 grams per square meter (gsm).
- the PBL is no more than 130 grams per square meter (gsm) .
- a Cobb (60 second) value of the PBL is less than 30 gsm.
- a cross direction wet expansion of the PBL is no greater than 0.8%.
- the step of blending results in multiple fibre blend streams each having a substantially even mixture of RCF and VKF.
- the substantially even mixture includes greater than 35% VKF.
- the PBL is for a base of the plasterboard and the system incl udes the step of manipulating fibres of the fibre blend streams so that a machine direction to cross direction tensile ratio (MD:CD) of the PBL is not more than 1.4.
- MD:CD machine direction to cross direction tensile ratio
- the PBL is for a face of the plasterboard and the system includes the step of manipulating fibres of the fibre blend streams so that a machine direction to cross direction tensile ratio (MD:CD) of the PBL is not less than 2.2.
- the system advantageously includes the step of applying a pigment coating to the face PBL.
- the pigment coating preferably provides a light colour surface with diffuse blue reflectance factor not less than 30.
- the pigment coating preferably provides a light colour surface with diffuse blue reflectance factor not less than 40.
- Figure 1 is a schematic diagram showing steps performed by a known system for manufacturing plaster board from plasterboa rd liner and gypsum slurry;
- Figure 2a is a schematic diagram showing steps performed by a known system for manufacturing plasterboard liner from mainly recycled paper fibre;
- Figure 2b is a schematic diagram showing steps performed for stock prepa ration by the known system shown in Figure 2a ;
- Figure 2c is a schematic diagram showing steps performed for paper making by the known system shown in Figure 2a ;
- Figure 2d is a schematic diagram showing steps performed for paper strengthening by the system shown in Figure 2a ;
- Figure 3a is a schematic diagram showing steps performed by a system for manufacturing plasterboard liner
- Figure 3b is a schematic diagram showing steps performed for fibre prepa ration and blending by the system shown in Figure 3a ;
- Figure 3c is a schematic diagram showing steps performed for paper making by the system shown in Figure 3a ;
- Figure 3d is a schematic diagram showing steps performed for pigment coating by the system shown in Figure 3a ;
- Figures 4 to 9 show test data for plasterboard liner produced by the system shown in Figure 3a .
- the system 10 shown in Figures 3a includes apparatus 12 for manufacturing plasterboard liner (PBL) 14 of less than 140 grams per square meter (gsm) .
- PBL plasterboard liner
- the system 10 can advantageously produce PBL ranging between l lOgsm and 130gsm.
- the system 10 achieves PBL of less than 140 gsm with one or more of the following : Back PBL MD : CD tensile ratio not greater than 1.4;
- Face PBL MD CD tensile ratio not less than 2.2;
- the PBL thus achieves the necessary characteristics of dimensional stability, and tensile strength for the combined back and face to make it suitable for subsequent plasterboard sheet ma nufacture.
- the system 10 achieves these results using a substantially even ratio of recycled paper fibre (RCF) 16 and virgin Kraft fibre (VKF) 18, for example.
- RCF recycled paper fibre
- VKF virgin Kraft fibre
- the system uses any other suitable ratio of RCF and VKF to achieve a PBL 14 of less than 140 gsm.
- the system 10 is also suitable for manufacturing plasterboard liner (PBL) 14 of less than 130 grams per square meter (gsm) .
- PBL plasterboard liner
- the system 10 can advantageously produce PBL ranging between l lOgsm and 125gsm.
- the system 10 achieves PBL of less than 130 gsm with one or more of the following :
- Face PBL MD CD tensile ratio not less than 2.2;
- Face PBL light colour surface not less than ISO brightness 40.
- the PBL thus achieves the necessary characteristics of dimensional stability, and tensile strength for the combined back and face to make it suitable for subsequent plasterboard sheet ma nufacture.
- the system 10 achieves these results using a substantially even ratio of recycled paper fibre (RCF) 16 and virgin Kraft fibre (VKF) 18, for example.
- RCF recycled paper fibre
- VKF virgin Kraft fibre
- the system uses any other suitable ratio of RCF and VKF to achieve a PBL 14 of less than 130 gsm.
- the lighter PBL 14 is advantageous across a number of manufacturing and commercial aspects including :
- the paper product volume is increased for the same weight virgin Kraft fibre by mixing with RCF and this has a manufacturing advantage for a pulp mill in reducing the bottle neck imposed by the rate and cost of pulp production to output of paper products;
- the system 10 also advantageously solves the problem of a light coloured PBL face without additional fibre layer.
- the system 10 includes an option to apply a pigment coating 24 to PBL to achieve an ivory coloured surface with ISO brightness not less than 30, for example.
- the system 10 includes an option to apply a pigment coating 24 to PBL to achieve an ivory coloured surface with ISO brightness not less than 40, for example. This is achieved using an application process to the PBL surface.
- the advantage of the solution is that PBL face with a light coloured surface is manufactured without the need to use light coloured RCF and this avoids the need for RCF recovered white paper feedstock and the stock preparation de-inking process or the purchase of white fibre feedstock.
- the apparatus 12 includes:
- each apparatus 20 to 24 By way of non limiting example, a detailed description on the operation of each apparatus 20 to 24 is set out below.
- the fibre preparation and blending apparatus 20 receives RCF 16 and VKF 18 from preceding co-located manufacturing processes.
- the VKF 18 is manufactured using the Kraft process technology and refined to achieve paper properties using known process technology. For example, Visy's Tumut Kraft Mill in Australia produces high quality kraft paper for domestic and international markets using woodchips from softwood plantations in southern NSW supplemented by recyclable wastepaper.
- the RCF 16 is manufactured using recovered paper/cardboard from which recyclable cellulose fibres are extracted using known process technology.
- RCF 16 and water 32 are added to the RCF pulper tank 26. The contents of the pulper tank 26 is then passed through contaminant screens 30 to remove contaminant materials such as plastic and metal in a known step common to paper making using RCF. The RCF is then sent to the blend tank 34.
- VKF 18 and water 32 are added to the Kraft fibre pulper & pre-treatment tank 28.
- Charge control chemicals are added to maximise reactivity of the VKF 18 with sizing chemicals later added by the chemical additive apparatus 38 (described below in further detail with reference to the paper making apparatus 22) .
- ATC anionic trash collector
- the pre-treated VKF is then sent to the blend tank 34.
- the blend tank 34 takes the pre-treated VKF 18 and the screened RCF 16 and generates multiple fibre blend streams of substantially even mixtures.
- VKF 18 the mixture of RCF 16 and VKF 18 can be used with a view to obtaining PBL of less than 140 gsm or 130 gsm.
- the mixture may be 40% VKF.
- the system 10 is described below with reference to the mixture being substantially even.
- Each stream forms a ply of the multi ply paper machine 36 of the paper making apparatus 22 with a substantially even fibre loading on the total PBL of RCF 16 and VKF 18.
- wet expansion results in dimensional changes on the paper relative to the original paper in the dry state.
- Certain fibres have a greater potential to reabsorb moisture than others.
- RCF has a lower level of wet expansion than VKF.
- RCF has a lower tensile strength than VKF.
- the blend tank 34 maintains a balance between RCF 16 and VKF 18 content of the fibre streams for each ply of the multi ply paper machine 36. It uses fibre slurry consistency and flow rate to achieve a specified RCF 16 and VKF 18 composition of the multiple outflow fibre streams.
- Each outflow fibre stream forms a ply and the multiple plys are combined through the paper making apparatus 22 to form a multi ply paper sheet.
- RCF 16 and VKF 18 are very important within the respective paper plys as well as the ply split within the composite PBL.
- the blending of RCF 16 and VKF 18 to achieve the necessary fibre blend of the fibre streams is identified schematically in Figure 3b.
- RCF An advantage of RCF is than it has a lower level of wet expansion and significantly cheaper raw material to manufacture PBL.
- a disadvantage with RCF is that manufactured PBL has a lower tensile strength than, for example, an equivalent weight PBL using virgin Kraft fibre.
- the advantage of virgin Kraft fibre is that manufactured PBL has a vastly superior tensile strength.
- the disadvantage of virgin Kraft fibre is that manufactured PBL has a high level of wet expansion.
- the blend tank 34 provides a substantially even mixture of RCF 16 and VKF 18 in multiple streams for the paper making apparatus 22. This results in an even fibre ratio across the total multi ply PBL sheet, for example.
- the paper making apparatus 22 includes: a. a multi ply paper machine 36, including :
- paper fibre formation apparatus 37 also known as paper machine wet end
- Multi Ply Paper Machine 36 manufactures paper sheet by first forming multiple fibre plys that are then combined into a multi ply paper sheet prior to drying. The formation of paper sheet using a 2 ply paper machine is shown schematically in Figure 3c, for example.
- the paper machine wet end 37 receives fibre from the blend tank 34 in multiple streams and this is carefully manipulated to achieve the required basis weight of the combined ply paper sheet, for example 130gsm, and composition of RCF 16 and VKF 18, for example, greater than 35% virgin Kraft fibre.
- the paper machine wet end 37 jet-to-wire ratio is carefully manipulated to control the physical fibre orientation of the paper sheet.
- This ratio which is the difference between the speed of the fibre forming section jet and that of the forming section wire, is used to fine-tune a PBL's fibre structure. It also effectively determines the dominant directional tensile strength of the paper sheet in either the machine direction (MD) or cross direction (CD).
- the jet-to-wire ratio is less than unity, and the fibre content is high, and this 'draws' or 'drags' the fibres out in the MD and achieves a high MD:CD tensile ratio.
- the jet-to-wire ratio is carefully controlled to either 'drag' or 'rush' (when jet-to-wire ratio is greater than unity) the paper sheet to manipulate the proportion of fibre alignment in the CD. Combined with the low fibre content, this achieves MD:CD tensile ratios that differ substantially between back and face PBL. For example:
- the chemical additive apparatus 38 chemically sizes the multiple paper substrate plys to increase hydrophobicity of both RCF 16 and VKF 18 thereby reducing the multi ply paper sheet's tendency to absorb liquid .
- the following steps are performed in that regard : a. the VKF 18 is pre-treated at the fibre preparation and blending apparatus 20 with charge control chemical technology to maximize the virgin Kraft fibre's ability to react with sizing chemicals;
- internal sizing chemical technology is applied to the multi ply paper sheet by the chemical additive apparatus 38 using for example the following cationic rosin > 12 kg/t, aluminum sulphate (Alum) >24 kg/t, and Alkyl Ketene Dimer >3 kg/t
- the PBL manufactured by the system 10 includes the use and sizing of VKF 18 to achieve the necessary dimensional stability and tensile strength suitable for the subsequent manufacture of plasterboard sheet. This, in turn, enables the plasterboard sheet to achieve its required market characteristics of flat, ripple free surfaces and high blending strength.
- the system 10 solves the problem of refined VKF 18 which is reactive to contact with moisture and this makes it unsuitable for use in PBL as the required dimensional stability is not achieved.
- the manufacture of plasterboard sheet requires the PBL to be in contact with gypsum slurry as it is sandwiched between the face and back PBL. Too much wet expansion through water absorption from the slurry during pressing to adjust thickness can result in subsequent rippling of the end product surfaces following drying of the slurry to produce the plasterboard sheet.
- the system 10 can use various functional sizing chemical technology for PBL .
- a combination of sizing chemicals is used, for example : a. cationic rosin > 12 kg/t;
- Functional sizing chemical technology reduces the natural tendency of fibres to reabsorb moisture after paper has been dried.
- Internal sizing chemical technology reduces the paper tendency to absorb water by attaching hydrophobic molecules to the fibres. These molecules effectively repel water before water is able to penetrate into the fibre structure.
- surface sizing chemical technology is also applied at the surface sizing chemical apparatus 46 of the coating machine 44.
- a limited amount of sizing chemical is applied as a layer to create surface barrier to reduce water penetration into the PBL.
- the speed control apparatus 40 acts to reduce the draw between successive processes on the formed paper sheet through its pressing and drying . This reduces the tendency for formed paper sheet to react when contacted with water thereby reducing the hydro expansion. This feature is identified schematically in Figure 3c. Successive paper machine sections (press, dryer and reel) relative speed controls are carefully controlled by the speed control apparatus 40 to minimize fibre draw in the MD before application to the drying drums 42 to minimise sheet shrinkage to less than 2% for example.
- the pigment coating apparatus 24 includes: a. a coating machine 44;
- Figure 3d shows schematically how the coating machine 44 is used for this feature.
- pigment coating is that coating can be formulated to achieve the desired surface appearance, for example light coloured face PBL of ISO brightness not less than 30.
- the coating can be formulated to achieve the desired surface appearance, for example light coloured face PBL of ISO brightness not less than 40.
- Pigment coating is significantly cheaper than light coloured RCF used in traditional Ivory grades.
- a disadvantage is that pigment coating chemicals do not have any tensile strength enhancement of the PBL. As such, the tensile strength must be derived from the VKF 18 and the RCF 16.
- the coating machine 44 works by enabling a finite amount of pigment coating film to be metered onto one (or two) rolls through which paper runs. The pigment coating film effectively transfers onto the sheet once the paper passes through the rolls. The amount of pigment coating is carefully controlled by the coati ng recipe, its solid content, the applicator rod selection and contact time on the rolls.
- the pigment coating recipe includes a mixture of different clay and/or calcium carbonate pigments and binders.
- the coating machine 44 for example a film press, includes the pigment application apparatus 48 and the surface sizing chemical apparatus 46.
- the incorporation of the pigment application apparatus 48 allows the coating machine 44 to add a coating pigment in addition to the applied starch.
- the reason for the addition of pigment is to affect the surface appearance of the face PBL.
- the addition of the surface sizing chemical apparatus 46 to the coating machine 44 allows for blending surface sizing chemical technology with starch, water or coating pigment to enhance hydrophobicity of the paper and achieve a coating thickness of 7- 8 ml/m2 for example.
- the surface sizing chemical is 100% retained on the face PBL sheet.
- Figure 3d shows schematically how the coating machine 44, for example a film press, is used for this feature.
- the advantages of the coating machine 44 is that cheaper alternative pigments eg. clay and calcium carbonate can be precisely metered onto the PBL sheet to replicate an Ivory ply for face PBL. Other advantages are that the appearance can be modified with recipe of coating and application loading.
- Alternatives to a coating machine 44 are: a.
- Sizing for paper means the use of chemicals to reduce its tendency to absorb liquid. Internal sizing chemicals are applied during paper formation to be incorporated throughout the paper sheet through bonding to cellulose fibres to increase their hydrophobicity. Surface sizing chemicals are applied as a thin coating on the paper sheet and have a hydrophillic end that joins to the cellulose fibre and a hydrophobic end that faces away to make the paper surface more resistant to the penetration of liquid. A measure of resistance to liquid absorption is the Cobb value, which is the surface water absorption in grams per square meter over 60 seconds. As the manufacture of plasterboard sheet requires PBL to be in contact with moisture via the gypsum slurry, PBL is 'hard sized' paper. This means it is in the category of papers with the highest water resistance.
- Trial 1 Initial base line study to determine quality at normal ply loading at 30% RCF substitution to the top wire (TW) (also referred to as the "bottom ply") .
- Moderate water absorption test performed on paper (COBB) 25-30 at maximum CRS size dosage for normal wet end chemistry. The test resulted in significant rippling associated with Wet Expansion .
- Trial 3 to test the baseline to understand %RCF and Tensile ratio on Wet Expansion . Also TOPKraft j umbo. The trial also included manufacture K110PB at low Tensile ratio and TOPKraft jumbo.
- K125PB a. Expect plasterboard MD breaking strength 300 N ( in combination with PV170) b. ASA hard sized 4.5-5 kg/Adt
- FACE application best option is Capability 3 (highest tensile ratio) K125PB and high sized ROSIN :
- COBB Water absorptiveness is the mass of water absorbed in a specific time by one square meter of paper, board, or corrugated fibreboard under one centimetre of water.
- MD Machine Direction paper direction along the length of the paper machine.
- CSF Canadian Standard Freeness A measure of the drainage of paper pulp linked to refining and pulp quality.
- PV170 170gsm Ivory Face paperboard liner
- TSI Tensile Stiffness Index Ultrasonic, non-destructive test method for determining the strength of paper, and plaster board liner.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI2017703200A MY183000A (en) | 2015-03-03 | 2016-02-24 | A system and process |
AU2016228111A AU2016228111B2 (en) | 2015-03-03 | 2016-02-24 | A system and process |
NZ735104A NZ735104B2 (en) | 2015-03-03 | 2016-02-24 | A process for manufacturing plasterboard liner (PBL) for plaster board |
KR1020177027757A KR102275245B1 (en) | 2015-03-03 | 2016-02-24 | systems and processes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2015900738 | 2015-03-03 | ||
AU2015900738A AU2015900738A0 (en) | 2015-03-03 | A system and process |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016138554A1 true WO2016138554A1 (en) | 2016-09-09 |
Family
ID=56849066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2016/050122 WO2016138554A1 (en) | 2015-03-03 | 2016-02-24 | A system and process |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR102275245B1 (en) |
AU (1) | AU2016228111B2 (en) |
MY (1) | MY183000A (en) |
WO (1) | WO2016138554A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020151950A1 (en) * | 2019-01-21 | 2020-07-30 | Sig Technology Ag | Method including generating a layer sequence from three compositions of at least partly different ph, especially for producing a carrier layer |
WO2021213710A1 (en) * | 2020-04-22 | 2021-10-28 | Voith Patent Gmbh | Gypsum plaster board |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4210692A (en) * | 1978-11-17 | 1980-07-01 | Champion International Corporation | Overlay sheet and wood laminate |
US5055161A (en) * | 1991-02-21 | 1991-10-08 | Green Bay Packaging Inc. | Multiple ply paper product containing an outer ply of reclaimed white office waste |
US5945198A (en) * | 1997-09-12 | 1999-08-31 | United States Gypsum Company | Coated wallboard employing unbleached face paper comprising a coating containing soy protein |
WO2001045932A1 (en) * | 1999-12-23 | 2001-06-28 | Luongo Joseph S | Strengthened, light weight construction board and method and apparatus for making the same |
WO2003099548A1 (en) * | 2000-03-03 | 2003-12-04 | The Hoffman Group, Ltd. | Composite paperboards and method of making composite paperboards |
US20060191656A1 (en) * | 2005-02-11 | 2006-08-31 | Buzza Stephen A | Paper substrates useful in wallboard tape applications |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW459084B (en) | 1998-05-04 | 2001-10-11 | Visy R & Amp D Pty Ltd | Paper liner for plasterboard and plasterboard product and methods of producing the same |
DK1645484T3 (en) * | 2004-10-06 | 2019-07-15 | Mountit Dev A/S | A set of elements for handling construction boards, such as plaster boards |
-
2016
- 2016-02-24 AU AU2016228111A patent/AU2016228111B2/en active Active
- 2016-02-24 MY MYPI2017703200A patent/MY183000A/en unknown
- 2016-02-24 WO PCT/AU2016/050122 patent/WO2016138554A1/en active Application Filing
- 2016-02-24 KR KR1020177027757A patent/KR102275245B1/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4210692A (en) * | 1978-11-17 | 1980-07-01 | Champion International Corporation | Overlay sheet and wood laminate |
US5055161A (en) * | 1991-02-21 | 1991-10-08 | Green Bay Packaging Inc. | Multiple ply paper product containing an outer ply of reclaimed white office waste |
US5945198A (en) * | 1997-09-12 | 1999-08-31 | United States Gypsum Company | Coated wallboard employing unbleached face paper comprising a coating containing soy protein |
WO2001045932A1 (en) * | 1999-12-23 | 2001-06-28 | Luongo Joseph S | Strengthened, light weight construction board and method and apparatus for making the same |
WO2003099548A1 (en) * | 2000-03-03 | 2003-12-04 | The Hoffman Group, Ltd. | Composite paperboards and method of making composite paperboards |
US20060191656A1 (en) * | 2005-02-11 | 2006-08-31 | Buzza Stephen A | Paper substrates useful in wallboard tape applications |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020151950A1 (en) * | 2019-01-21 | 2020-07-30 | Sig Technology Ag | Method including generating a layer sequence from three compositions of at least partly different ph, especially for producing a carrier layer |
WO2021213710A1 (en) * | 2020-04-22 | 2021-10-28 | Voith Patent Gmbh | Gypsum plaster board |
Also Published As
Publication number | Publication date |
---|---|
KR20180019504A (en) | 2018-02-26 |
MY183000A (en) | 2021-02-05 |
AU2016228111B2 (en) | 2019-09-19 |
KR102275245B1 (en) | 2021-07-13 |
AU2016228111A1 (en) | 2017-09-21 |
NZ735104A (en) | 2021-08-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4959272A (en) | Gypsum wallboard paper having imitation manila colored coating | |
US20050155731A1 (en) | Process for making abrasion resistant paper and paper and paper products made by the process | |
CN102212983A (en) | High-intensity environment-friendly craft paper and manufacturing method thereof | |
CN105586802B (en) | A kind of manufacture method of the rich body paper of product | |
CN104846684B (en) | Environment-friendly plastics-absorption double-surface coated white board paper and preparation technology thereof | |
CN102605671A (en) | Production method of art paper containing crude fibers | |
CN102888778A (en) | Production method of glassine body paper | |
CN103103863A (en) | Method for producing dry type duplicating body paper | |
CN111335061A (en) | Coated white paperboard and preparation method thereof | |
AU2016228111B2 (en) | A system and process | |
CN114507999B (en) | Coated white cardboard of various fiber raw materials and production process thereof | |
CN105064113A (en) | Technique for manufacturing high-performance printing paper | |
CN102493258A (en) | Woodfree writing paper and production method thereof | |
CN104831578A (en) | Preparation method of high-grade thermosensitive base paper | |
CN1705797A (en) | Papers comprising a boron-containing compound and a method of making same | |
CN106245415A (en) | A kind of manufacture method of glassine paper | |
EP3137680A1 (en) | Process for producing at least one ply of a paper or board and a paper or board produced according to the process | |
CN108277695A (en) | A kind of manufacturing method of frosted body paper | |
CN105239442B (en) | A kind of preparation method of lower shrinkage secondary stock neutral sizing | |
NZ735104B2 (en) | A process for manufacturing plasterboard liner (PBL) for plaster board | |
CN111021126B (en) | Low-quantitative release base paper and preparation method thereof | |
AT524998B1 (en) | Printable multi-ply paper for packaging and method of making same | |
EP4286584B1 (en) | Liquid packaging board | |
CN110331622B (en) | Manufacturing method of waterproof and antifreezing kraft paper | |
CN113661289A (en) | Use of metal chelates as surface applications for improving the abrasiveness and/or taber stiffness of paper and board |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16758371 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2016228111 Country of ref document: AU Date of ref document: 20160224 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20177027757 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16758371 Country of ref document: EP Kind code of ref document: A1 |