CN113895114B - Composite wallboard combining natural veneer and aluminum honeycomb plate and manufacturing process thereof - Google Patents

Composite wallboard combining natural veneer and aluminum honeycomb plate and manufacturing process thereof Download PDF

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Publication number
CN113895114B
CN113895114B CN202111216831.9A CN202111216831A CN113895114B CN 113895114 B CN113895114 B CN 113895114B CN 202111216831 A CN202111216831 A CN 202111216831A CN 113895114 B CN113895114 B CN 113895114B
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sponge
aluminum
aluminum honeycomb
plate
polyurethane
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CN113895114A (en
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郑贤静
刘辉
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Yuxiu Industrial Holding Co ltd
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Yuxiu Industrial Holding Co ltd
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    • 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
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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    • 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
    • B32B21/047—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 foam
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    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
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    • 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
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0866—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements composed of several layers, e.g. sandwich panels or layered panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B38/04—Punching, slitting or perforating
    • B32B2038/042—Punching
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    • B32B2266/0278—Polyurethane
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2607/00—Walls, panels
    • B32B2607/02—Wall papers, wall coverings

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to the field of architectural decoration, and provides a composite wallboard combining natural veneer and an aluminum honeycomb panel and a manufacturing process thereof. The technical scheme of the invention is as follows: a natural veneer decorative fireproof sound-insulation aluminum honeycomb plate comprises a natural veneer, a sponge adhesive layer and an aluminum honeycomb plate. The natural veneer is combined with the aluminum honeycomb panel through a sponge adhesive layer. The sponge adhesive layer is of a multilayer composite structure, and the interior of the sponge adhesive layer contains a polyurethane adhesive and a flame retardant. The surface of the aluminum honeycomb plate is provided with grooves. The aluminum honeycomb panel has good stability, weather resistance and fire resistance, the sponge adhesive layer is bonded on the surfaces of the two layers of panels, the effects of moisture conduction, moisture storage and moisture dissipation are achieved, a space is reserved for expansion with heat and contraction with cold, and the effect of maintaining the natural veneer is achieved. Simultaneously, the sponge viscose layer also provides good buffering effect and fireproof effect, has increased composite wall panel's bulk strength.

Description

Composite wallboard combining natural veneer and aluminum honeycomb plate and manufacturing process thereof
Technical Field
The invention relates to the field of architectural decoration, in particular to a natural veneer and aluminum honeycomb panel composite wallboard.
Background
The aluminum honeycomb panel is an aluminum plate having a honeycomb structure. The aluminum honeycomb panel comprises an aluminum skin and an aluminum honeycomb structure, a high heat conduction value is formed between the aluminum skin and the aluminum honeycomb structure, the expansion and contraction of the inner aluminum skin and the outer aluminum skin are synchronous, and the aluminum honeycomb skin is provided with small holes, so that gas in the panel can flow freely, and structural deformation can not be caused when the aluminum honeycomb panel expands with heat and contracts with cold. Because the aluminum honeycomb plate has the advantages of high wind pressure resistance, shock absorption, sound insulation, heat preservation, flame retardance, high specific strength and the like, the aluminum honeycomb plate is widely applied to the aspects of high-rise building outer wall decoration, indoor partition wall plates and the like.
The natural veneer is made up by using natural log as base material and adopting multiple processes of planing and cutting, etc. to obtain the veneer with uniform thickness. The natural veneer is non-toxic and environment-friendly, has pure natural wood grains on the surface, emits natural costustoot, can reflect the characteristics of natural wood materials in home decoration, greatly reduces the cost compared with pure wood decoration, and is popular and loved by people.
At present, most of the existing wallboards are used after natural wood veneers are adhered on the surfaces of aluminum honeycomb panels so as to combine the advantages of the aluminum honeycomb panels and the natural wood veneers. However, the wall surface is prone to accumulate moisture, the wallboard with the veneer attached thereon has poor waterproof performance, and the natural veneer is prone to foaming, glue failure, cracking, aging and the like due to moisture. At the same time, the impact resistance of the wallboard needs to be improved.
Chinese patent CN212499282U discloses a composite decorative board with wood veneer adhered on an aluminum plate, which adopts a double-layer glue layer of polyethylene glue, miscellaneous leather and white latex to adhere the wood veneer and the aluminum plate, wherein the aluminum plate is hollow inside, the inside of the aluminum plate is provided with a reinforcing rib, and a first splicing part and a second splicing part which are respectively positioned at two sides of the aluminum plate are arranged. The decorative board that this technical scheme provided is easily assembled, and intensity is high, bonds firmly, but does not carry out treatments such as waterproof, resistant weather to the veneer.
Chinese patent CN213979554U discloses a sealed light composite wall panel, which comprises a steel frame, a rear wall panel, a front wall panel, an outer layer filling block, a protection plate, a fireproof plate, etc., and can ensure the sealing performance of the composite plate and improve the high temperature resistance of the composite plate. However, the wallboard has a large number of layers and large density, internal stress cannot be released in time, deformation is easy to cause, and the manufacturing process is complex.
Chinese patent CN113085285A discloses an aluminum-wood composite fireproof acoustic board, which comprises a substrate, a first aluminum board layer, a first wood skin layer, a first specially-customized glue layer, a second aluminum board layer, a second wood skin layer, a second specially-customized glue layer and the like, wherein the bottom of the second wood skin layer is provided with fireproof acoustic paper which is bonded. The wallboard is matched with the aluminum plate layer by utilizing the non-combustible inorganic composite board, so that the base material achieves the non-combustible effect, and the wallboard has the advantages of high strength and difficult deformation. But the wallboard does not address the handling and maintenance of the veneer.
To the problem that prior art exists, this application has provided the composite wall panel that natural veneer and aluminum honeycomb panel combine.
Disclosure of Invention
The invention aims to provide a composite wallboard combining natural wood veneer and an aluminum honeycomb panel.
The technical purpose of the invention is realized by the following technical scheme:
a natural veneer decorative fireproof sound-insulation aluminum honeycomb plate comprises a natural veneer, a sponge adhesive layer and an aluminum honeycomb plate. The natural veneer is combined with the aluminum honeycomb panel through a sponge adhesive layer. The sponge adhesive layer is composed of polyurethane sponge and polyvinyl alcohol sponge, the polyurethane sponge and the polyvinyl alcohol sponge form a layer-by-layer staggered and overlapped structure, the polyurethane sponge is N layers, the polyvinyl alcohol sponge is N-1 layers, and N is a natural number of 2-5. The sponge adhesive layer is formed by neutral sponge or hard sponge, and the interior of the sponge adhesive layer comprises a polyurethane adhesive and a flame retardant. The surface of the aluminum honeycomb plate is provided with a groove which is penetrated along the extension direction of the wall plate.
The manufacturing steps of the sponge adhesive layer comprise:
s1, cutting and forming N pieces of polyurethane sponge and N-1 pieces of polyvinyl alcohol sponge, and dipping in glue to enable the glue to permeate the sponge. Wherein N is a natural number of 2-5.
And S2, stacking the soaked polyurethane sponge and the soaked polyvinyl alcohol sponge in a staggered manner from top to bottom to form a layer-staggered and overlapped structure, and ensuring that the polyurethane sponge is always on the outermost layer.
And S3, heating in vacuum at 40-70 ℃ for 10-20 minutes to volatilize the polyurethane adhesive diluent in the sponge and enhance the viscosity of the polyurethane adhesive, so that the polyurethane sponge and the polyvinyl alcohol sponge are tightly compounded to obtain the sponge adhesive layer.
The glue in S1 can be glue formed by uniformly mixing single-component thermosetting polyurethane glue, a flame retardant, water and a polyurethane glue diluent according to a certain proportion.
Preferably, the glue water in S1 can be weighed and uniformly mixed according to the following weight ratio: 80-90% of single-component thermosetting polyurethane adhesive, 1-5% of flame retardant and 10-20% of polyurethane adhesive diluent.
Preferably, the sponge is a sponge with the hardness of 45-70 degrees.
Preferably, the soaking time of the polyurethane sponge is 30 to 60 minutes, and the soaking time of the polyvinyl alcohol sponge is 20 to 30 minutes, because the water absorption capacities of the two sponges are different.
Preferably, the flame retardant is one or more of TCEP, TCPP, TDCPP, DMMP, TPP, MPP and FB.
And sequentially paving a base plate, an isolation adhesive film, a first aluminum plate, glue printing, an aluminum honeycomb core, glue printing, a second aluminum plate, the base plate and the isolation adhesive film on a working vehicle or a working platform, and performing composite hot pressing by using a hot press to obtain the aluminum honeycomb plate.
Cutting log, steaming, drying to obtain natural veneer. Brushing wax oil on the surface of the natural veneer.
Machining a groove which runs through from end to end along the extension direction of the wallboard on a first aluminum plate of the aluminum honeycomb plate by using a milling machine, and performing roughening processes such as sand blasting or wire drawing to enable the surface of the aluminum honeycomb plate to have roughness.
And (3) punching holes on the aluminum plate of the aluminum honeycomb plate by using a punching machine, wherein the punched holes penetrate through the first aluminum plate, and the punching density is the same as the density of the honeycomb structure of the aluminum honeycomb core.
And placing the sponge adhesive layer on the aluminum honeycomb plate, and embedding the polyurethane sponge at the bottommost layer into the groove and the punched hole of the first aluminum plate.
The natural wood veneer is placed on the polyurethane sponge at the topmost layer, and the aluminum honeycomb plate is placed under the polyurethane sponge at the bottommost layer.
Pressurizing, heating properly or drying by blowing to solidify the sponge adhesive layer, and compounding the natural veneer and the aluminum honeycomb panel.
Preferably, the water content of the natural veneer is 8% -12% after the natural veneer is dried.
Preferably, when the wood wax oil is coated on the surface of the natural veneer, 1L of the wood wax oil is coated on every 15 to 20 square meters of the natural veneer.
Preferably, the first aluminum plate has grooves, punched holes or both.
Preferably, the groove on the first aluminum plate is semicircular or rectangular.
Preferably, the diameter of a punched single hole on the first aluminum plate is between 1 and 5mm.
Preferably, when the natural wood veneer and the aluminum honeycomb plate are compounded, hot pressing is carried out at 80 to 100 ℃ for 10 to 20 minutes.
In conclusion, the invention has the following beneficial effects:
the composite wallboard prepared by the technical scheme of the invention effectively combines the physical characteristics of stable structure, fire prevention and sound insulation of the aluminum honeycomb panel and the environmental protection and aesthetic property of natural wood, has simple and elegant appearance, and is suitable for interior decoration.
The sponge adhesive layer provided by the invention is used for bonding two layers of plates, so that the steps of arranging a plurality of sound insulation layers and moisture absorption layers for achieving sound insulation and fire prevention effects in the traditional technical scheme are omitted, the problems of insufficient shear bearing, infirm gluing, excessive glue application and the like caused by excessive wall plate layers are solved, the environmental protection property is improved, the process is simplified, and the resources are saved. The polyvinyl alcohol sponge has good water absorption, and the polyurethane sponge has low water absorption, so the sponge adhesive layer can form a moisture absorption channel, so that moisture in the natural wood skin is quickly absorbed and stored in the polyvinyl alcohol sponge, then the moisture is further diffused and enters the polyurethane sponge, and the circulation is performed until the moisture is discharged through the grooves or punched holes on the first aluminum plate, so that good moisture guiding, storing and dissipating effects are achieved.
Furthermore, the sponge adhesive layer provided by the invention can play a role in controlling humidity and has certain elasticity, so that a space can be reserved for thermal expansion and cold contraction of the natural veneer, the retention of moisture in the natural veneer is reduced, the effect of maintaining the natural veneer is played, and the service life of the natural veneer is prolonged.
In addition, the sponge adhesive layer can play the cushioning effect when composite wall panel receives the impact, increases composite wall panel's bulk strength and security. Meanwhile, the flame retardant is added into the sponge adhesive layer for fire-resistant treatment, so that the composite wallboard provided by the invention also has good fire-resistant and fireproof performances.
Drawings
Fig. 1 is a cross-sectional view of a composite wall panel of the present invention combining natural wood skin and aluminum honeycomb panel.
Fig. 2 is a schematic layered view of a composite wallboard combining natural wood skin and aluminum honeycomb panel according to the present invention.
In the figure: 1. natural wood veneer; 2. a polyurethane sponge; 3. polyvinyl alcohol sponge; 4. a first aluminum plate with grooves; 5. an aluminum honeycomb core; 6. a second aluminum plate.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the figures, which are based on the orientations and positional relationships shown in the figures, and are used for convenience in describing the patent and to simplify the description, but are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
The walnut bark was cut into 1000 × 2000mm size for use, and the aluminum honeycomb plate was cut into 1000 × 2000m size for use. The walnut skin thickness is 0.6mm, and among the aluminum honeycomb panel, aluminum veneer thickness is 2.0mm, and aluminum honeycomb core thickness is 8mm.
According to the weight part ratio: 80% of single-component thermosetting polyurethane glue; GRPHOS 8815 10 flame retardant 3% of Guleke; GRPHOS 8815 57 fire retardant 2% of Guleke; 15% of polyurethane diluent is prepared into glue.
50 DEG high density polyurethane sponge (1) (3) was sheared to 1000X 2000X 2mm,50 DEG hard high density polyvinyl alcohol sponge (2) was sheared to 1000X 2000X 3mm. Soaking the sponges (1) and (3) in the glue for 40 minutes, and soaking the sponges (2) in the glue for 30 minutes, and turning over every 5 minutes until the sponges are completely penetrated by the glue.
The polyurethane sponge (1), the polyvinyl alcohol sponge (2) and the polyurethane sponge (3) are sequentially stacked in an aligned mode from top to bottom to form a sponge adhesive layer, and the thickness of the sponge adhesive layer is 7mm. And (3) placing the sponge adhesive layer in a vacuum thermostat, setting the temperature to be 40 ℃, heating for 20 minutes, and turning the sponge once every 5 minutes to ensure that the glue is uniformly permeated in the sponge. After being taken out, the sponge can be seen to be primarily bonded.
The first aluminum plate of the aluminum honeycomb plate is processed into rectangular grooves which are communicated end to end along the length direction of the aluminum plate by a milling machine, the depth of each groove is 1mm, the width of each groove is 5mm, and the distance between the grooves is 5mm. The aluminum plate was sand-blasted to impart roughness to the surface.
And (2) placing the sponge adhesive layer on the aluminum honeycomb plate, wherein the polyurethane sponge (3) is in contact with the surface of the aluminum honeycomb plate, and the polyurethane sponge (1) is in contact with the walnut wood skin. Putting the mixture into a hot press, setting the temperature of the hot press to be 80 ℃, carrying out hot pressing for 15 minutes, standing and cooling. And (4) after the adhesive is completely cured, obtaining the walnut veneer and aluminum honeycomb panel composite wallboard.
Example 2.
The walnut bark was cut into 1000 × 2000mm size for use, and the aluminum honeycomb plate was cut into 1000 × 2000m size for use. The walnut skin thickness is 0.6mm, and among the aluminum honeycomb panel, aluminum veneer thickness is 3.0mm, and aluminum honeycomb core thickness is 10mm.
According to the weight part ratio: 77% of single-component thermosetting polyurethane adhesive; 3% of Starter FRA 9555 flame retardant; 20% of polyurethane diluent is prepared with glue.
60 ° high density polyurethane sponges (1) (3) (5) were sheared to 1000 x 2000 x 2mm,60 ° high density polyvinyl alcohol sponges (2) (4) were sheared to 1000 x 2000 x 2mm. And (2) soaking the sponge (1) and (3) in the glue for 30 minutes, and soaking the sponge (2) in the glue for 20 minutes, and turning over every 5 minutes until the glue is observed to completely permeate the sponge.
The polyurethane sponge (1), the polyvinyl alcohol sponge (2) and the polyurethane sponge (3) are sequentially stacked in an aligned mode from top to bottom to form a sponge adhesive layer, and the thickness of the sponge adhesive layer is 10mm. And (3) placing the sponge adhesive layer in a vacuum thermostat, setting the temperature to be 40 ℃, heating for 30 minutes, and turning the sponge once every 5 minutes to ensure that the glue is uniformly permeated in the sponge. After being taken out, the sponge can be seen to be primarily bonded.
And (3) punching a first aluminum plate of the aluminum honeycomb plate by using a punching machine, wherein the punched hole penetrates through the first aluminum plate, and the density of the punched hole is the same as that of the honeycomb structure of the aluminum honeycomb core. The punched holes are circular and have a diameter of 4mm.
And placing the sponge adhesive layer on the aluminum honeycomb plate, wherein the polyurethane sponge (5) is in contact with the first aluminum plate, and the polyurethane sponge (1) is in contact with the walnut wood skin. Putting into a hot press, setting the temperature of the hot press at 80 ℃, hot-pressing for 1 minute, standing and cooling. And (4) after the adhesive is completely cured, obtaining the walnut veneer and aluminum honeycomb panel composite wallboard.
Example 3
Cutting walnut bark into 1000 × 2000mm size for later use, and cutting an aluminum honeycomb plate into 1000 × 2000m size for later use. The walnut skin thickness is 0.6mm, and among the aluminium honeycomb panel, aluminium veneer thickness is 3.0mm, and aluminium honeycomb core thickness is 10mm.
According to the weight part ratio: 80% of single-component thermosetting polyurethane glue; 5% of Huijuan CAS 115-96-8 flame retardant; 15% of polyurethane diluent is prepared with glue.
60 DEG high density polyurethane sponge (1) (3) was sheared to 1000X 2000X 2mm, and 60 DEG high density polyvinyl alcohol sponge (2) was sheared to 1000X 2000X 2mm. Soaking the sponges (1) and (3) in the glue for 40 minutes, and soaking the sponges (2) in the glue for 30 minutes, and turning over every 5 minutes until the sponges are completely penetrated by the glue.
The polyurethane sponge (1), the polyvinyl alcohol sponge (2) and the polyurethane sponge (3) are sequentially stacked in an aligned mode from top to bottom to form a sponge adhesive layer, and the thickness of the sponge adhesive layer is 10mm. And (3) placing the sponge adhesive layer in a vacuum thermostat, setting the temperature to be 40 ℃, heating for 30 minutes, and turning the sponge once every 5 minutes to ensure that the glue is uniformly permeated in the sponge. After being taken out, the sponge can be seen to be primarily bonded.
And (3) punching a first aluminum plate of the aluminum honeycomb plate by using a punching machine, wherein the punched hole penetrates through the first aluminum plate, and the density of the punched hole is the same as that of the honeycomb structure of the aluminum honeycomb core. The punched holes are circular and have a diameter of 4mm.
And placing the sponge adhesive layer on the aluminum honeycomb plate, wherein the polyurethane sponge (3) is in contact with the first aluminum plate, and the polyurethane sponge (1) is in contact with the walnut bark. Putting the mixture into a hot press, setting the temperature of the hot press to be 80 ℃, carrying out hot pressing for 2 minutes, standing and cooling. And (4) after the adhesive is completely cured, obtaining the walnut veneer and aluminum honeycomb panel composite wallboard.
Comparative example 1
This comparative example provides a composite wallboard substantially the same as example 1 except that the sponge adhesive layer in comparative example 1 consists of only one piece of 7mm thick polyurethane sponge.
Comparative example 2
This comparative example provides a composite wallboard substantially the same as example 1 except that the first aluminum sheet of the aluminum honeycomb panel in comparative example 1 is not provided with grooves or punched holes.
Comparative example 3
This comparative example provides a composite wallboard, which is a commercially available solid wood faced aluminum honeycomb panel of a certain brand, having the same dimensions as examples 2 and 3, and having a surface wood skin substantially the same as the walnut wood skins of examples 1, 2 and 3, except that a single component thermosetting polyurethane adhesive is directly used to bond the natural wood skin and the aluminum honeycomb panel.
Results of the experiment
1. The composite wall panels provided in examples 1-3 and comparative examples 1-3 were subjected to performance testing as specified in GB/T23451-2009 with the results given in the following table.
Impact resistance Coefficient of thermal conductivity (w/m.k) Compressive strength (MPa)
Example 1 No crack after 5 times of impact test 2.17 4.5
Example 2 No cracking after 5 times of impact resistance test 1.92 4.3
Example 3 No crack after 5 times of impact test 2.33 3.9
Comparative example 1 No cracking after 5 times of impact resistance test 2.10 4.4
Comparative example 2 No cracking after 5 times of impact resistance test 2.03 4.6
Comparative example 3 No cracking after 5 times of impact resistance test 2.25 4.0
2. The composite wallboards provided in examples 1-3 and comparative examples 1-3 were placed in a closed environment with a relative air humidity of >95% for 10 hours, and the deformation amount of the surface veneer was measured by measuring the percentage of the change in the length of the diagonal of the veneer before and after the test to the diagonal of the veneer before the test, i.e., the magnitude of the relative deformation of the veneer after being wetted, thereby reflecting the moisture resistance of the composite wallboard, and the results are shown in the following table.
Amount of deformation (%)
Example 1 0.62
Example 2 0.36
Example 3 0.46
Comparative example 1 0.73
Comparative example 2 0.75
Comparative example 3 0.91
3. Audio having a volume of 80db was played at a distance of 50cm in front of the composite wallboards provided in examples 1 to 3 and comparative examples 1 to 3, the received volume was measured at a distance of 50cm behind the composite wallboards, and the percentage of the volume at the receiving side to the original volume reduction value in the original volume was calculated as a sound insulation effect.
Sound insulation Effect (%)
Example 1 43％
Example 2 53％
Example 3 30％
Comparative example 1 41％
Comparative example 2 41％
Comparative example 3 22％
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims (3)

1. A composite wallboard combining natural veneer and an aluminum honeycomb panel is characterized by comprising the natural veneer, a sponge adhesive layer and the aluminum honeycomb panel, wherein the natural veneer and the aluminum honeycomb panel are combined through the sponge adhesive layer, the sponge adhesive layer is composed of polyurethane sponge and polyvinyl alcohol sponge which are respectively subjected to glue impregnation treatment, the glue is formed by uniformly mixing 80-90% of single-component thermosetting polyurethane glue, 1-5% of flame retardant and 10-20% of polyurethane glue diluent, the polyurethane sponge and the polyvinyl alcohol sponge form a layer-by-layer staggered and overlapped structure, the polyurethane sponge layer is positioned on the outermost layer, the polyurethane sponge is N layers, the polyvinyl alcohol sponge is N-1 layers, and N is a natural number of 2-5; the aluminum honeycomb plate sequentially comprises a first aluminum plate, printing glue, an aluminum honeycomb core, printing glue and a second aluminum plate from top to bottom, wherein a groove is formed in the first aluminum plate, the groove penetrates through the aluminum honeycomb core from end to end along the extension direction of the wall plate, and the depth of the groove is 1/3-1/2 of the thickness of the first aluminum plate; the first aluminum plate is provided with a punched hole, the punched hole penetrates through the first aluminum plate, the density of the punched hole is the same as that of the honeycomb structure of the aluminum honeycomb core, the punched hole is circular, and the diameter of the punched hole is 4mm; the polyurethane sponge at the bottommost layer of the sponge adhesive layer is embedded into the groove and the punched hole of the first aluminum plate.
2. A method of making a natural wood skin and aluminum honeycomb panel-bonded composite wallboard according to claim 1, comprising the steps of:
s1, sequentially paving a backing plate, an isolation adhesive film, a first aluminum plate, glue printing, an aluminum honeycomb core, glue printing, a second aluminum plate, a backing plate and an isolation adhesive film on a working vehicle or a working platform from top to bottom, and performing composite hot pressing by using a hot press to obtain an aluminum honeycomb plate;
s2, cutting off the log, steaming and drying to obtain natural veneer with the water content of 8-12%;
s3, brushing wood wax oil on the surface of the natural wood veneer, and coating 1L of wood wax oil on each 15-20 square meters of the natural wood veneer;
s4, respectively dipping the polyurethane sponge and the polyvinyl alcohol sponge in glue, wherein the polyurethane sponge is dipped for 30-60 minutes, and the polyvinyl alcohol sponge is dipped for 20-30 minutes; the glue is prepared in the following manner, and the components are respectively weighed according to the following weight proportions: 80-90% of single-component thermosetting polyurethane adhesive, 1-5% of flame retardant and 10-20% of polyurethane adhesive diluent, and fully and uniformly mixing the components at room temperature;
s5, forming a groove in a first aluminum plate of the aluminum honeycomb plate, wherein the groove is communicated end to end along the extension direction of the wall plate; punching holes are formed in a first aluminum plate of the aluminum honeycomb plate, the punching holes penetrate through the first aluminum plate, and the punching density is the same as the honeycomb structure density of the aluminum honeycomb core;
s6, tightly stacking the soaked polyurethane sponge and polyvinyl alcohol sponge to form a layer-layer staggered and overlapped structure, and heating at constant temperature of 40-70 ℃ for 10-20 minutes under a vacuum condition to obtain a sponge adhesive layer, wherein the polyurethane sponge layer is positioned on the outermost layer;
s7, placing the sponge adhesive layer between a natural veneer and a first aluminum plate, and carrying out hot pressing at 80-100 ℃ for 10-20 minutes to obtain a composite wallboard; the polyurethane sponge at the bottommost layer of the sponge adhesive layer is embedded into the groove and the punched hole of the first aluminum plate.
3. The method of claim 2, wherein the flame retardant comprises one or more of TCEP, TCPP, TDCPP, DMMP, TPP, MPP, FB.
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