CN106182216A - Double-layer wood composite floor board and preparation method thereof - Google Patents

Double-layer wood composite floor board and preparation method thereof Download PDF

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Publication number
CN106182216A
CN106182216A CN201610538895.3A CN201610538895A CN106182216A CN 106182216 A CN106182216 A CN 106182216A CN 201610538895 A CN201610538895 A CN 201610538895A CN 106182216 A CN106182216 A CN 106182216A
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China
Prior art keywords
substrate
millimeter
dash board
groove
depth
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Pending
Application number
CN201610538895.3A
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Chinese (zh)
Inventor
吴殿满
李春平
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Individual
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Individual
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Priority to CN201610538895.3A priority Critical patent/CN106182216A/en
Publication of CN106182216A publication Critical patent/CN106182216A/en
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Classifications

    • 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
    • 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
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • 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
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • E04F15/045—Layered panels only of wood

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)

Abstract

A kind of double-layer wood composite floor board and preparation method thereof, belong to wood processing technique field, dash board and substrate bonding is used to make double-layer wood composite floor board, dash board is identical with substrate grain direction, the one side of substrate has transverse concave groove, and the reeded one side of substrate or additionally one side are bonded in the dash board back side and make solid wooden compound floor.Its preparation method is that employing is separately dried process dash board and substrate, substrate fluting and the step such as dash board and substrate heat pressure adhesive complete.Solid wooden compound floor of the present invention is that wood grain longitudinally combines two layers of floor, saves timber resources, reduces cost, reduce the coating weight of glue, reduce burst size of methanal, it is ensured that environmental protection, and solve and be, by two-layer, the stress problem that same direction is brought, it is ensured that the stability on floor.

Description

Double-layer wood composite floor board and preparation method thereof
Technical field:
The invention belongs to wood processing technique field, relate to a kind of solid wooden floor board.
Background technology:
Solid wooden floor board is divided into monomer solid wooden floor board and Compossite solid-wood floor plate, and monomer solid wooden floor board is worth higher single timber Processing, production technology is simple, but the cost of raw material is high；Compossite solid-wood floor plate is made up of multi-layer solid wood bonding, only surface One layer of use value and the higher timber of quality are as dash board, and other layer uses the fast growing wood of low cost as substrate, reduces Material cost, but production technology is relative complex.Compossite solid-wood floor plate is three layers or more than three layers at present, and reason is if made Doing two layers compossite solid-wood floors, substrate can only be one layer, and lines must be consistent with dash board direction, i.e. length direction is suitable Stricture of vagina, due to stress deformation, such final products are very easy to warping phenomenon occur, and existing open source information is not also for this The solution of problem.And if substrate is vertical with the lines of dash board, substrate needs a section splicing, intensity not to reach will Ask.
Summary of the invention:
The technical problem to be solved in the present invention is open a kind of double-layer wood composite floor board.
The present invention further simultaneously discloses the preparation method on this floor.
It is to use dash board and substrate bonding to make double-layer wood composite floor board, dash board that the present invention solves the scheme of technical problem Identical with substrate grain direction, the one side of substrate has transverse concave groove, and the reeded one side of substrate or additionally one side are bonded in table Back makes solid wooden compound floor.
Dash board and zig are 500-3000 millimeter, and width is 60-300 millimeter, and dash board thickness is 1-6 millimeter, Substrate thickness is 5-20 millimeter, the width 1.0-2.0 millimeter of groove, and the spacing 40-60 millimeter of adjacent grooves, the degree of depth of groove is 3-15 millimeter or the degree of depth are 2-3 millimeter, and when the substrate recess degree of depth is 3-15 millimeter, reeded one side is bonded in the dash board back side Make solid wooden compound floor；When depth of groove is 2-3 millimeter, the one side of substrate un-grooved is bonded in the dash board back side, makes solid wood Composite floor board.
Preferred version is dash board and zig is 500-3000 millimeter, and width is 60-300 millimeter, dash board thickness For 2-4 millimeter, substrate thickness is 8-15 millimeter, the width 1.2-1.8 millimeter of groove, and the spacing 45-55 millimeter of adjacent grooves is recessed The degree of depth of groove is 5-10 millimeter or the degree of depth is 2-3 millimeter, and when the substrate recess degree of depth is 5-10 millimeter, reeded one side is bonding Solid wooden compound floor is made at the dash board back side；When depth of groove is 2-3 millimeter, the one side of substrate un-grooved is bonded in the dash board back of the body Face, makes solid wooden compound floor.
The preparation method of composite floor board of the present invention comprises the following steps:
1, dash board processing: be processed into plate square bar according to specification needed for floor with log, plate square bar base area plate gauge lattice are processed Becoming dash board, predry, to qualification rate 20-30%, enters kiln drying dry 10-15 days, moisture content 5.5-6.5%, balance health-preserving 65-80 hour；
2, substrate processing: being processed into sheet material with log according to required specification, predry, to qualification rate 25-30%, enters kiln drying dry 12-15 days, qualification rate reached 6-7%, balance health-preserving 65-80 hour；
3, recessing: solid wood baseplate is by the fixed thick sanding of specification, recessing；
4, hot pressing: by ready dash board back side veneer gluing, glue-spread is 200g/, by dash board, substrate-parallel forward Putting, pressure is 13.5-14.5MPA, and the time is 7-10 minute, and temperature is 90-95 DEG C of pressing, and dash board moisture content is 5.5- 6.5%, substrate moisture content 6-7%；
5, balance: it is little that the slab after hot pressing balances 65-80 at temperature 25-30 DEG C, the sealing condition of humidity 40-50% Time；
6, sanding mortise: mortise technique is identical with the general floorings course of processing, cutter motor rotating speed is at 5000-6000 Rev/min；
7, surface processes: surface is scratched trace, oiling or japanning after coloring or chemical treatment.The optimum drying work of dash board Skill following steps:
Temperature DEG C Humidity % Time (h)
Early stage processes 38 38 12
It is dried 40 39 24
It is dried 42 40 24
It is dried 44 42 24
Middle place one 52 51 12
It is dried 44 42 12
It is dried 46 43 24
It is dried 48 44 24
It is dried 50 44 24
Middle place two 58 57 4
It is dried 50 42 24
It is dried 50 40 24
It is dried 50 38 24
Later stage processes 58 58 6
Later stage Balance Treatment 25-30 72
Substrate optimum drying process is as follows:
Temperature DEG C Humidity % Time (h)
Initial stage processes 55 12 24
It is dried 57 11 24
It is dried 60 11 24
It is dried 63 10 24
It is dried 65 9 24
Mid-term processes 70 13 10
It is dried 72 9 24
It is dried 74 9 24
It is dried 76 8 24
Torr fat processes 105 10 24
Later stage processes 88 10 24
Equilibrium treatment 80-85 10 72
78 8 24
80 8 24
85 7 24
Floor of the present invention is through detection, and outward appearance meets GB/T18103-2013 standard, and specification meets GB/ T101032000 standard, every arbitrary cumulative length come unglued is less than the 1/3 of this glue-line length, MOR (MPa) 31, elastic modelling quantity (MPa) 5140, moisture content 3-7%, paint film adhesion meets the requirements, surface abrasion resistance g/100 people r0.11, and paint Film does not grinds, surface no-pollution vestige, Form aldehyde release mz/L0.7.
Solid wooden compound floor of the present invention, is that the crisscross wood grain that is improved to of the grain direction by traditional three layers or multilamellar is indulged To combining two layers of floor, save timber resources, reduce cost, reduce the coating weight of glue, reduce burst size of methanal, it is ensured that environmental protection, And solving and be, by two-layer, the stress problem that same direction is brought, it is ensured that the stability on floor, the outward appearance on this floor is given People with attractive in appearance, comfortable, classical visual enjoyment.
Accompanying drawing illustrates:
Fig. 1 is that the reeded one side of substrate is bonded in the dash board back side and makes the partial schematic diagram on floor；
Fig. 2 is that the one side of substrate un-grooved is bonded in the dash board back side and makes the partial schematic diagram on floor.
Detailed description of the invention:
Example 1, (1) dash board are processed: being processed into plate square bar with log according to specification needed for floor, it is equal that plate square bar is processed into length Being 3000 millimeters, width is 300 millimeters, and thickness is the dash board 1 of 6 millimeters, and predry, to qualification rate 30%, enters kiln drying dry 15 days, Moisture content 5.5%, balance health-preserving 80 hours；
(2) substrate processing: being processed into length with log and be 3000 millimeters, width is 300 millimeters, and thickness is 20 millimeters Substrate 2 sheet material, predry, to qualification rate 30%, enters kiln drying dry 15 days, and qualification rate reaches 7%, balance health-preserving 80 hours；
(3) recessing: solid wood baseplate sanding, recessing 3, the width of its further groove 2.0 millimeters, the spacing 60 of adjacent grooves Millimeter, the degree of depth of groove is 15 millimeters；
(4) hot pressing: by ready dash board back side veneer gluing, glue-spread is 200g/, by suitable to dash board, substrate-parallel To putting, the fluted one side of substrate is pasted onto the dash board back side, and pressure is 14.5MPA, and the time is 10 minutes, and temperature is 95 DEG C of pressures Closing, dash board moisture content is 6.5%, substrate moisture content 7%；
(5) balance: the slab after hot pressing, temperature 30 DEG C, balances 80 hours under the sealing condition of humidity 50%；
(6) sanding mortise: mortise technique is identical with the general floorings course of processing, cutter motor rotating speed 6000 turns/ Point；
(7) surface processes: surface is scratched trace, coloring.
Example 2, (1) dash board are processed: being processed into plate square bar with log according to specification needed for floor, it is equal that plate square bar is processed into length Being 500 millimeters, width is 60 millimeters, and thickness is the dash board 1 of 1 millimeter, and predry, to qualification rate 20%, enters kiln drying dry 10 days, contains Water rate 6.5%, balance health-preserving 68 hours；
(2) substrate processing: being processed into length with log and be 500 millimeters, width is 60 millimeters, and thickness is 5 millimeters Substrate 2 sheet material, predry, to qualification rate 20%, enters kiln drying dry 10 days, and qualification rate reaches 6%, balance health-preserving 68 hours；
(3) recessing: solid wood baseplate sanding, recessing 3, the width of its further groove 1.0 millimeters, the spacing 40 of adjacent grooves Millimeter, the degree of depth of groove is 2 millimeters；
(4) hot pressing: by ready dash board back side veneer gluing, glue-spread is 200g/, by suitable to dash board, substrate-parallel To putting, substrate un-grooved one side is pasted onto the dash board back side, and pressure is 13.5MPA, and the time is 7 minutes, and temperature is 90 DEG C of pressings, Dash board moisture content is 5.5%, substrate moisture content 6%；
(5) balance: the slab after hot pressing, temperature 25 DEG C, balances 68 hours under the sealing condition of humidity 40%；
(6) sanding mortise: mortise technique is identical with the general floorings course of processing, cutter motor rotating speed 5000 turns/ Point；
(7) surface processes: surface is scratched trace, japanning.
Example 3, (1) dash board are processed: being processed into plate square bar with log according to specification needed for floor, it is equal that plate square bar is processed into length Being 2000 millimeters, width is 200 millimeters, and thickness is the dash board 1 of 4 millimeters, and predry, to qualification rate 30%, enters kiln drying dry 15 days, Moisture content 5.5%, balance health-preserving 80 hours；
(2) substrate processing: being processed into length with log and be 2000 millimeters, width is 200 millimeters, and thickness is 15 millimeters Substrate 2 sheet material, predry, to qualification rate 30%, enters kiln drying dry 15 days, and qualification rate reaches 7%, balance health-preserving 80 hours；
(3) recessing: solid wood baseplate sanding, recessing 3, the width of its further groove 1.5 millimeters, the spacing 50 of adjacent grooves Millimeter, the degree of depth of groove is 10 millimeters；
(4) hot pressing: by ready dash board back side veneer gluing, glue-spread is 200g/, by suitable to dash board, substrate-parallel To putting, the fluted one side of substrate is pasted onto the dash board back side, and pressure is 14.5MPA, and the time is 10 minutes, and temperature is 95 DEG C of pressures Closing, dash board moisture content is 6.5%, substrate moisture content 7%；
(5) balance: the slab after hot pressing, temperature 30 DEG C, balances 80 hours under the sealing condition of humidity 50%；
(6) sanding mortise: mortise technique is identical with the general floorings course of processing, cutter motor rotating speed 6000 turns/ Point；
(7) surface processes: surface is scratched trace, coloring.
Example 4, (1) dash board are processed: being processed into plate square bar with log according to specification needed for floor, it is equal that plate square bar is processed into length Being 1000 millimeters, width is 100 millimeters, and thickness is the dash board 1 of 3 millimeters, and predry, to qualification rate 20%, enters kiln drying dry 10 days, Moisture content 6.5%, balance health-preserving 68 hours；
(2) substrate processing: being processed into length with log and be 1000 millimeters, width is 100 millimeters, and thickness is 10 millimeters Substrate 2 sheet material, predry, to qualification rate 20%, enters kiln drying dry 10 days, and qualification rate reaches 6%, balance health-preserving 68 hours；
(3) recessing: solid wood baseplate sanding, recessing 3, the width of its further groove 1.2 millimeters, the spacing 45 of adjacent grooves Millimeter, the degree of depth of groove is 3 millimeters；
(4) hot pressing: by ready dash board back side veneer gluing, glue-spread is 200g/, by suitable to dash board, substrate-parallel To putting, substrate un-grooved one side is pasted onto the dash board back side, and pressure is 13.5MPA, and the time is 7 minutes, and temperature is 90 DEG C of pressings, Dash board moisture content is 5.5%, substrate moisture content 6%；
(5) balance: the slab after hot pressing, temperature 25 DEG C, balances 68 hours under the sealing condition of humidity 40%；
(6) sanding mortise: mortise technique is identical with the general floorings course of processing, cutter motor rotating speed 5000 turns/ Point；
(7) surface processes: surface is scratched trace, japanning.
The wherein optimum drying technique following steps of dash board:
Temperature DEG C Humidity % Time (h)
Early stage processes 38 38 12
It is dried 40 39 24
It is dried 42 40 24
It is dried 44 42 24
Middle place one 52 51 12
It is dried 44 42 12
It is dried 46 43 24
It is dried 48 44 24
It is dried 50 44 24
Middle place two 58 57 4
It is dried 50 42 24
It is dried 50 40 24
It is dried 50 38 24
Later stage processes 58 58 6
Later stage Balance Treatment 25-30 72
Substrate optimum drying process is as follows:

Claims (4)

1. a double-layer wood composite floor board, it is characterised in that: it is made up of dash board and substrate bonding, dash board and substrate wood grain side To identical, the one side of substrate has transverse concave groove, and the reeded one side of substrate or additionally one side are bonded in the dash board back side and make reality Wood composite floor.
Double-layer wood composite floor board the most according to claim 1, it is characterised in that: dash board and zig are 500- 3000 millimeters, width is 60-300 millimeter, and dash board thickness is 1-6 millimeter, and substrate thickness is 5-20 millimeter, the width of groove 1.0-2.0 millimeter, the spacing 40-60 millimeter of adjacent grooves, the degree of depth of groove is 3-15 millimeter or the degree of depth is 2-3 millimeter, base When plate depth of groove is 3-15 millimeter, reeded one side is bonded in the dash board back side；When depth of groove is 2-3 millimeter, substrate without The one side of groove is bonded in the dash board back side.
Double-layer wood composite floor board the most according to claim 2, it is characterised in that: dash board and zig are 500- 3000 millimeters, width is 60-300 millimeter, and dash board thickness is 2-4 millimeter, and substrate thickness is 8-15 millimeter, the width of groove 1.2-1.8 millimeter, the spacing 45-55 millimeter of adjacent grooves, the degree of depth of groove is 5-10 millimeter or the degree of depth is 2-3 millimeter, base When plate depth of groove is 5-10 millimeter, reeded one side is bonded in the dash board back side；When depth of groove is 2-3 millimeter, substrate without The one side of groove is bonded in the dash board back side.
Double-layer wood composite floor board the most according to claim 1, it is characterised in that preparation method comprises the following steps:
(1) dash board processing: being processed into plate square bar with log according to specification needed for floor, plate square bar base area plate gauge lattice are processed into table Plate, predry, to qualification rate 20-30%, enters kiln drying dry 10-15 days, moisture content 5.5-6.5%, balance health-preserving 65-80 hour；
(2) substrate processing: being processed into sheet material with log according to required specification, predry, to qualification rate 25-30%, enters the dry 12-15 of kiln drying My god, qualification rate reaches 6-7%, balance health-preserving 65-80 hour；
(3) recessing: solid wood baseplate is by the fixed thick sanding of specification, recessing；
(4) hot pressing: by ready dash board back side veneer gluing, glue-spread is 200g/, dash board, substrate-parallel is forward put Putting, pressure is 13.5-14.5MPA, and the time is 7-10 minute, and temperature is 90-95 DEG C of pressing, and dash board moisture content is 5.5-6.5%, Substrate moisture content 6-7%；
(5) balance: the slab after hot pressing balances 65-80 hour at temperature 25-30 DEG C, the sealing condition of humidity 40-50%；
(6) sanding mortise: mortise technique is identical with the general floorings course of processing, cutter motor rotating speed 5000-6000 turn/ Point；
(7) surface processes: surface is scratched trace, oiling or japanning after coloring or chemical treatment.
CN201610538895.3A 2016-07-08 2016-07-08 Double-layer wood composite floor board and preparation method thereof Pending CN106182216A (en)

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Application Number Priority Date Filing Date Title
CN201610538895.3A CN106182216A (en) 2016-07-08 2016-07-08 Double-layer wood composite floor board and preparation method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110640851A (en) * 2019-09-30 2020-01-03 广州市众益装饰材料有限公司 Preparation process and application of pine front core

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2190142Y (en) * 1994-04-13 1995-02-22 姜春晓 Wood floor
JPH1088778A (en) * 1996-09-18 1998-04-07 Nankai Plywood Kk Sound shield floor panel
CN2295811Y (en) * 1997-03-19 1998-10-28 蒋佳学 Five facet tongued and grooved flooring strip
CN2310819Y (en) * 1997-09-27 1999-03-17 李文勋 Composite Phyllostachys pubescens sheet faced floor
CN2364124Y (en) * 1999-01-18 2000-02-16 李发荣 Composite China fir and miscellaneous tree flooring
CN2697196Y (en) * 2004-03-18 2005-05-04 谷端欣 Floor especially for ground heating
US20060288885A1 (en) * 2005-02-04 2006-12-28 Park Young W Method for enhancing texture of wood panel
CN101302887A (en) * 2008-06-18 2008-11-12 吴殿满 Crude wood transverse cutting tridimensional wood composite floor and manufacture method thereof
CN201206320Y (en) * 2008-05-09 2009-03-11 丛伟斌 High-efficiency antideformation geothermal energy multilayer wood compound floor
CN201297015Y (en) * 2008-08-06 2009-08-26 鞠立伟 Wood-ceramic floor
CN102528862A (en) * 2012-03-06 2012-07-04 浙江农林大学 Method for producing stable high-strength solid-wood composite board
CN102561654A (en) * 2011-12-30 2012-07-11 广州市番禺康达木业有限公司 Solid wood foor
CN103510682A (en) * 2012-06-29 2014-01-15 上海筑邦木业有限公司 Double-layer solid wood floorboard and manufacturing and installing method thereof
CN204590511U (en) * 2015-04-23 2015-08-26 孙建新 A double-layer composite solid wood floor

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2190142Y (en) * 1994-04-13 1995-02-22 姜春晓 Wood floor
JPH1088778A (en) * 1996-09-18 1998-04-07 Nankai Plywood Kk Sound shield floor panel
CN2295811Y (en) * 1997-03-19 1998-10-28 蒋佳学 Five facet tongued and grooved flooring strip
CN2310819Y (en) * 1997-09-27 1999-03-17 李文勋 Composite Phyllostachys pubescens sheet faced floor
CN2364124Y (en) * 1999-01-18 2000-02-16 李发荣 Composite China fir and miscellaneous tree flooring
CN2697196Y (en) * 2004-03-18 2005-05-04 谷端欣 Floor especially for ground heating
US20060288885A1 (en) * 2005-02-04 2006-12-28 Park Young W Method for enhancing texture of wood panel
CN201206320Y (en) * 2008-05-09 2009-03-11 丛伟斌 High-efficiency antideformation geothermal energy multilayer wood compound floor
CN101302887A (en) * 2008-06-18 2008-11-12 吴殿满 Crude wood transverse cutting tridimensional wood composite floor and manufacture method thereof
CN201297015Y (en) * 2008-08-06 2009-08-26 鞠立伟 Wood-ceramic floor
CN102561654A (en) * 2011-12-30 2012-07-11 广州市番禺康达木业有限公司 Solid wood foor
CN102528862A (en) * 2012-03-06 2012-07-04 浙江农林大学 Method for producing stable high-strength solid-wood composite board
CN103510682A (en) * 2012-06-29 2014-01-15 上海筑邦木业有限公司 Double-layer solid wood floorboard and manufacturing and installing method thereof
CN204590511U (en) * 2015-04-23 2015-08-26 孙建新 A double-layer composite solid wood floor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110640851A (en) * 2019-09-30 2020-01-03 广州市众益装饰材料有限公司 Preparation process and application of pine front core

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WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20161207