AU2021104973A4 - Formaldehyde-free decorative plywood with high stability and manufacturing method thereof - Google Patents
Formaldehyde-free decorative plywood with high stability and manufacturing method thereof Download PDFInfo
- Publication number
- AU2021104973A4 AU2021104973A4 AU2021104973A AU2021104973A AU2021104973A4 AU 2021104973 A4 AU2021104973 A4 AU 2021104973A4 AU 2021104973 A AU2021104973 A AU 2021104973A AU 2021104973 A AU2021104973 A AU 2021104973A AU 2021104973 A4 AU2021104973 A4 AU 2021104973A4
- Authority
- AU
- Australia
- Prior art keywords
- thick
- formaldehyde
- veneer
- layer
- plywood
- 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.)
- Ceased
Links
- 239000011120 plywood Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 46
- 239000002023 wood Substances 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 13
- 230000001070 adhesive effect Effects 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 10
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- -1 oxygen anion Chemical class 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 238000003763 carbonization Methods 0.000 claims abstract description 7
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000012792 core layer Substances 0.000 claims abstract description 4
- 238000005470 impregnation Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 12
- 238000007731 hot pressing Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000007688 edging Methods 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 238000011049 filling Methods 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/18—Compounds of alkaline earth metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/20—Compounds of alkali metals or ammonium
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
- B44C5/043—Ornamental plaques, e.g. decorative panels, decorative veneers containing wooden elements
-
- 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
- B32B2250/05—5 or more layers
-
- 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
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- 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
- B32B2451/00—Decorative or ornamental articles
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
This invention discloses formaldehyde-free decorative plywood with high stability
and manufacturing method thereof. Specifically, the front of the outermost layer is a
surface functional decorative film with antibacterial property and oxygen anion
excitation function; the back of the outermost layer is a balance decorative layer for
balancing action. The secondary outer layer is a symmetrical mat formation of two
layers of transverse reinforced thin veneer with thickness of 1.5-2.0mm. The middle
core layer is two symmetrical mat formation of two layers of thick core plywood that
are filled with molecular calcium carbonate, and modified with carbonization process.
Two adjacent veneers are bonded with formaldehyde-free adhesive. This invention
provides the integrated technology of preparing the decorative plywood with
antibacterial surface and excitation function of oxygen anion, which includes efficient
wood softening, rotary cutting-In-situ reaction deposition filling of sodium carbonate
and calcium chloride-high temperature carbonization for drying and shaping.
1/1
FIGURES
1
3 3
4 4
2
Description
1/1
1
3 3
4 4
Formaldehyde-free decorative plywood with high stability and manufacturing method thereof
The invention relates to a method for preparing formaldehyde-free decorative plywood by using fast-growing wood to make thick veneer filled with molecular calcium carbonate, and modified with carbonization process combined with subsequent gluing preparation, which belongs to the field of wood science, wood processing and artificial plywood technology.
In the production process of plywood, by increasing the thickness of each layer of veneer, the number of veneer layers and adhesive layers can be reduced, hence significantly reducing the amount of adhesive and the formaldehyde emission of the products. Moreover, increasing the thickness and reducing the number of veneer layers can greatly reduce the labor force and thus can improve work efficiency. Further, it can make the overall appearance of products closer to solid wood board, which leads to that thick core plywood has become an important field for development in recent years. However, due to the serious cracks on the back and the large deviation of veneer thickness caused by the rotary cutting of thick veneer, the plywood is produced with uneven thickness, and with more serious warping and distortion, thus making the veneering process more difficult, which has seriously affected the popularization and application of the products.
This invention aims at the status quo of the plywood manufacturing industry and the defect exist in the thick core plywood products, and provides formaldehyde-free decorative plywood with high stability and manufacturing method thereof.
The technical scheme provided by the invention is given as follows:
Formaldehyde-free decorative plywood with high stability is characterized in that it consists of 6 layers, wherein, the front surface of the outermost layer is a surface functional decorative film with antibacterial and excitation functions of oxygen anion, the back of the outermost layer is the balance decorative layer for balancing action, the secondary outer layer is a symmetrical mat formation of two layers of transverse reinforced thin veneer with thickness of 1.5-2.0mm. The middle core layer is two symmetrical mat formation of two layers of modified thick core plywood with thickness of 6.0-10.0mm that are filled with molecular calcium carbonate and modified with carbonization process. The adjacent veneers are glued with formaldehyde-free adhesive.
The manufacturing method of the high stability aldehyde free functional decorative board comprises the following process steps:
1) Wood section preparation and thick veneer rotary cutting: the log to be processed is sawn into a certain length of wood section, the wood section is spun into rotary log section by rotary cutting machine, and then the rotary log section is loaded into impregnation tank, vacuumized, inhaled sodium carbonate aqueous solution with temperature from normal temperature to 75 °C, pressurized impregnated for a certain time, and then the rotary log section is taken out, which is followed by spinning the wood section into 6-10mm thick veneers on the thick veneer rotary cutting machine;
2) Drying and stabilization of thick veneer: first dry the thick veneer to a moisture content of less than 18%, then put the thick veneer into an impregnation tank, inject calcium chloride saturated aqueous solution, press impregnation for a certain time, and take out the thick veneer; First put it into the dryer or drying kiln and dry it at the temperature of 95-105 °C until the moisture content of the veneer is 12-16%; Then put it into a hot press, raise the temperature to 180-240 °C, carbonize at high temperature for 3-10min under the condition of unit pressure of 0.2-0.6mpa, take it out and make a thick veneer with stable size;
3) Manufacturing of thick core base plate: two layers of stabilized thick veneers and two layers of thin veneers are composed of four layers of plates. Thermosetting aldehyde free adhesive is applied between adjacent thick veneers with a glue amount of 130-180g / m2. Then, the slab is loaded into the hot press, which is hot pressed and depressurized under the conditions of unit pressure of 0.8-1.2mpa and hot pressing temperature of 90 110 °C. The bonded slab is taken out and stacked at room temperature for more than 8h, The thick core substrate is made after edge alignment and fixed thickness sanding;
4) Veneering and forming processing of thick core substrate: apply formaldehyde free adhesive on the surface of the thick core substrate made after edge alignment and thickness sanding, with the glue amount of 80-120G / m2 on one side and aging for 10 min. Lay a layer of antibacterial oxygen anion film material on the front and a layer of impregnated balance film material on the back, and then put it into the hot press at the unit pressure of 0.8-1.2mpa Hot pressing for 1.0-2.0min under the condition of hot pressing temperature of 120-140 °C, take it out and cool it, saw it into specifications and dimensions, and make it into high stability aldehyde free functional decorative board.
Further, the impregnation time is determined by the diameter of log, and impregnation time is 0.5-2.0min for every 1mm diameter
Further, the average hot pressing time is 0.8-1.2min per 1mm slab thickness.
Further, the impregnated balance film material is impregnated paper or bonded nonwoven fabric
Compared with the prior art, the invention has the beneficial effects that:
This invention provides the integrated technology of rotary cutting in-situ reaction deposition filling of sodium carbonate and calcium chloride-high temperature carbonization for drying and shaping after wood softening process. It develops thick veneer with precise rotary cutting and dimensional stability, and adopts technology of formaldehyde-free gluing and functional decorative film material veneering to obtain decorative plywood with perfect integrity, excellent dimensional stability and surface antibacterial and oxygen anion excitation functions.
Fig. 1: Formaldehyde-free decorative plywood with high stability of the present invention.
Wherein : 1- surface functional decorative film, 2- back balanced decorative layer, 3- transverse reinforced thin veneer, and 4- modified thick core plywood.
The invention will be further explained with specific examples below.
Formaldehyde-free decorative plywood with high stability consists of 6 layers, wherein, the front surface of the outermost layer is a surface functional decorative film 1 with antibacterial and excitation functions of oxygen anion, the back of the outermost layer is the balance decorative layer 2 for balancing action, the secondary outer layer is a symmetrical mat formation of two layers of transverse reinforced thin veneer 3 with thickness of 1.5-2.0mm. The middle core layer is two symmetrical mat formation of two layers of modified thick core plywood 4 with thickness of 6.0-10.0mm that are filled with molecular calcium carbonate, and modified with carbonization process. The adjacent veneers are glued with formaldehyde-free adhesive.
Formaldehyde-free decorative plywood with high stability and manufacturing method thereof comprises the following steps:
1. Wood section preparation and thick veneer rotary cutting: Wood section preparation and thick veneer rotary cutting: sawing logs to be processed into wood sections with a certain length, preliminarily cutting the wood sections into relatively regular cylindrical wood sections (referred to as rotary log sections for short) by a rotary cutter, then putting the rotary log sections into an impregnation tank, vacuumizing, and inhaling sodium carbonate aqueous solution at normal temperature to 750 C, pressurized impregnating for a certain amount of time,(impregnation time is determined by the diameter of log, and impregnation time is 0.5-2.0min for every 1mm diameter) taking out the rotary log sections, and rotary cutting the wood sections into 6-10mm thick wood sections on the thick veneer rotary cutter.
2. Drying and stabilizing treatment of the thick veneer: firstly drying the thick veneer until the water content drops below 18%, then putting the thick veneer into an impregnation tank, injecting saturated aqueous solution of calcium chloride into the tank, pressurized impregnating for a certain amount of time(impregnation time is determined by the diameter of log, and impregnation time is 0.5-2.0min for every 1mm diameter)
, and taking out the thick veneer, firstly, loading the thick veneers into a dryer or a drying kiln, and drying at the temperature of 95-105°Cuntil the water content of the veneer reaches 12-16%. Then loading the veneer into a hot press, heating to 180-2400 C, carbonizing at high temperature for 3-10min under unit pressure of 0.2-0.6MPa, and taking out the veneer to prepare the thick veneer with stable size.
3. Manufacture of thick core substrate: Stabilizing two layers of thick veneers and two layers of thin veneers to form a four-layer plywood, applying thermosetting formaldehyde-free adhesive between adjacent thick veneers, the adhesive amount is 130-18g/m 2 then the slab is put into a hot press, hot-pressing it under condition of unit pressure of 0.8-1.2MPa and 90-110C, relieving the pressure, and the glued slabs are taken out and placed at room temperature for 8h, making them into thick core substrates after edging and sanding with fixed thickness.
4. Veneering and forming process of thick core substrate: Coating formaldehyde free adhesive on the surface of thick core substrate processed after edging and sanding with fixed thickness with the amount of 80-120g/m 2 on one side, aging for 30min, laying a layer of antibacterial oxygen anion membrane material on the front side and a layer of impregnated balance membrane material (impregnated paper, or bonded nonwoven fabric) on the back side, then putting the processed substrate a hot press, hot pressing for 1.0-2.0min under the conditions of unit pressure of 0.8-1.2MPa and hot pressing temperature of 120-140 0C, then taking out the substrate for cooling, sawing it into specifications and sizes to obtain formaldehyde-free decorative plywood with high stability.
The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent substitution and improvement made to the above embodiments by any person familiar with this profession according to the technical essence of the present invention without departing from the technical scheme of the present invention still falls within the protection scope of the technical scheme of the present invention.
Claims (5)
1. Formaldehyde-free decorative plywood with high stability is characterized in that it consists of 6 layers, wherein, the front surface of the outermost layer is a surface functional decorative film with antibacterial and excitation functions of negative oxygen anion, the back of the outermost layer is the back balance decorative layer for balancing action, the secondary outer layer is a symmetrical mat formation of two layers of transverse reinforced thin veneer with thickness of 1.5-2.0mm. The middle core layer is two symmetrical mat formation of two layers of modified thick core plywood with thickness of 6.0-10.0mm that are filled with molecular calcium carbonate, and modified with carbonization process. The adjacent veneers are glued with formaldehyde-free adhesive.
2. Formaldehyde-free decorative plywood with high stability and manufacturing method thereof is characterized in comprising the following steps:
(1) Wood section preparation and thick veneer rotary cutting: Wood section preparation and thick veneer rotary cutting: sawing logs to be processed into wood sections with a certain length, preliminarily cutting the wood sections into relatively regular cylindrical wood sections (referred to as rotary log sections for short) by a rotary cutter, then putting the rotary log sections into an impregnation tank, vacuumizing, and inhaling sodium carbonate aqueous solution at normal temperature to 750 C, pressurized impregnating for a certain amount of time, taking out the rotary log sections, and rotary cutting the wood sections into 6-10mm thick wood sections on the thick veneer rotary cutter.
(2) Drying and stabilizing treatment of the thick veneer: firstly drying the thick veneer until the water content drops below 18%, then putting the thick veneer into an impregnation tank, injecting saturated aqueous solution of calcium chloride into the tank, pressurized impregnating for a certain amount of time, and taking out the thick veneer, firstly, loading the thick veneers into a dryer or a drying kiln, and drying at the temperature of 95-105°Cuntil the water content of the veneer reaches 12-16%. Then loading the veneer into a hot press, heating to 180-2400C, carbonizing at high temperature for 3-10min under unit pressure of 0.2-0.6MPa, and taking out the veneer to prepare the thick veneer with stable size.
(3) Manufacture of thick core substrate: Stabilizing two layers of thick veneers and two layers of thin veneers to form a four-layer plywood, applying thermosetting formaldehyde-free adhesive between adjacent thick veneers, the adhesive amount is 130-180g/m2 , then the slab is put into a hot press, hot-pressing it under condition of unit pressure of 0.8-1.2MPa and 90-110C, relieving the pressure, and the glued slabs are taken out and placed at room temperature for 8h, making them into thick core substrates after edging and sanding with fixed thickness.
(4) Veneering and forming process of thick core substrate: coating formaldehyde free adhesive on the surface of thick core substrate processed after edging and sanding with fixed thickness with the amount of 80-120g/m 2 on one side, aging for 30min, laying a layer of antibacterial oxygen anion membrane material on the front side and a layer of impregnated balance membrane material on the back side, then putting the processed substrate a hot press, hot pressing for 1.0-2.0min under the conditions of unit pressure of 0.8-1.2MPa and hot pressing temperature of 120-1400C, then taking out the substrate for cooling, sawing it into specifications and sizes to obtain formaldehyde-free decorative plywood with high stability.
3. Formaldehyde-free decorative plywood with high stability and manufacturing method thereof, according to claim 2, is characterized in that impregnation time is determined by the diameter of log, and impregnation time is 0.5-2.0min for every 1mm diameter.
4. Formaldehyde-free decorative plywood with high stability and manufacturing method thereof, according to claim 2, is characterized in that the average hot pressing time is 0.8-1.2min per 1mm slab thickness.
5. Formaldehyde-free decorative plywood with high stability and manufacturing method thereof, according to claim 2, the impregnated balance film material is impregnated paper or bonded nonwoven fabric
FIGURES 1/1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104973A AU2021104973A4 (en) | 2021-08-05 | 2021-08-05 | Formaldehyde-free decorative plywood with high stability and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104973A AU2021104973A4 (en) | 2021-08-05 | 2021-08-05 | Formaldehyde-free decorative plywood with high stability and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021104973A4 true AU2021104973A4 (en) | 2021-09-30 |
Family
ID=77857777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021104973A Ceased AU2021104973A4 (en) | 2021-08-05 | 2021-08-05 | Formaldehyde-free decorative plywood with high stability and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021104973A4 (en) |
-
2021
- 2021-08-05 AU AU2021104973A patent/AU2021104973A4/en not_active Ceased
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101357470B (en) | Recombination wood and manufacturing method thereof | |
| CN101913174B (en) | Small-diameter restructured structural woods and manufacture technology thereof | |
| CN112643814B (en) | Recombined veneer glued without glue and preparation method thereof | |
| JP2012517364A (en) | Surface-reinforced natural wood mold material and method for producing the same | |
| CN108214729B (en) | Surface layer enhanced plywood and preparation method thereof | |
| CN101850573A (en) | Method for manufacturing sliced bamboo decoration material | |
| CN109591122B (en) | Method for vacuum compression and densification of wood material | |
| CN101298157A (en) | High-hardness plate and manufacturing method thereof | |
| CN103507139B (en) | A kind of manufacture method of formaldehyde-free solid-wood composite board | |
| CN101550759A (en) | Parquet using laminated veneer lumber strip as base material and production method thereof | |
| CN101863058A (en) | Novel laminated wood and manufacturing method thereof | |
| US20190255731A1 (en) | Reconstituted wood panel with natural wood grain and manufacturing method thereof | |
| CN108393977B (en) | High-stability formaldehyde-free functional decorative board and manufacturing method thereof | |
| AU2021104973A4 (en) | Formaldehyde-free decorative plywood with high stability and manufacturing method thereof | |
| CN106426430A (en) | Wood veneer treatment method and reconstituted wood | |
| CN113290657A (en) | Plywood processing technology | |
| JPH0716964A (en) | Laminated material and its manufacture | |
| CN107344381B (en) | High-strength truck composite bottom beam and manufacturing method thereof | |
| CN113290650B (en) | High-strength bamboo composite recombined material and manufacturing method thereof | |
| CN108797948A (en) | A kind of production technology of composite floor board | |
| CN208215566U (en) | A kind of high stability is without aldehyde functional decoration plate | |
| CN114474263A (en) | Preparation method of environment-friendly plywood | |
| CN211278857U (en) | Pressurized impregnated flame retardant type glued bamboo component | |
| CN206653489U (en) | Structure poplar wood base Scrimber | |
| US2089644A (en) | Process for the production of compressed wood or plywood |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |