CN117183498A - Ultrathin multilayer solid wood composite substrate, preparation method thereof and floor - Google Patents
Ultrathin multilayer solid wood composite substrate, preparation method thereof and floor Download PDFInfo
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- CN117183498A CN117183498A CN202311238100.3A CN202311238100A CN117183498A CN 117183498 A CN117183498 A CN 117183498A CN 202311238100 A CN202311238100 A CN 202311238100A CN 117183498 A CN117183498 A CN 117183498A
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- 239000000758 substrate Substances 0.000 title claims abstract description 72
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000002023 wood Substances 0.000 title claims abstract description 30
- 239000007787 solid Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000010410 layer Substances 0.000 claims abstract description 106
- 239000012792 core layer Substances 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims description 34
- 238000005520 cutting process Methods 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 239000002344 surface layer Substances 0.000 claims description 3
- 239000011185 multilayer composite material Substances 0.000 abstract description 2
- 244000166124 Eucalyptus globulus Species 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 244000086363 Pterocarpus indicus Species 0.000 description 2
- 235000009984 Pterocarpus indicus Nutrition 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Abstract
The application relates to the technical field of multilayer composite materials, and discloses an ultrathin multilayer solid wood composite substrate, a preparation method thereof and a floor, wherein the ultrathin multilayer solid wood composite substrate comprises laminated short core layers and long core layers which are arranged at intervals layer by layer, the total veneer layers of the short core layers and the long core layers are 3 layers, 5 layers or 7 layers, the thickness of the substrate is 2.0-5.0mm, the short core layers comprise a plurality of short core veneers which are adjacently arranged along the length direction of the substrate, the long core layers comprise one or more long core veneers which are adjacently arranged along the width direction of the substrate, and the thickness of the short core layers is smaller than or equal to the long core layers. The ultrathin multilayer solid wood composite substrate has the advantage of good deformation resistance.
Description
Technical Field
The application relates to the technical field of multilayer composite materials, in particular to a multilayer solid wood composite substrate with a thinner thickness, a preparation method of the substrate and a multilayer solid wood composite floor prepared by using the substrate.
Background
The multi-layer solid wood composite floor is a floor product with higher cost performance. Generally, the larger the thickness of the floor, the higher the production cost is, but the floor has higher dimensional stability, such as tile and warp are not easy to occur; on the contrary, deformation is easy to occur, but the production cost is relatively low. Therefore, the thickness of the current multi-layer solid wood composite floor is generally 16mm at the maximum and 12mm at the minimum in view of the balance between the production cost and the dimensional stability of the product. The thickness range can be suitable for most decoration occasions.
For the purpose of further reducing the production cost and adapting to some special decoration occasions, such as insufficient reserved height, or secondary decoration paved on the original ceramic tiles and floors, the multilayer solid wood composite floors with thinner thickness are required to be designed and manufactured, namely, the multilayer solid wood composite substrates with thinner thickness are required. However, as described above, the substrate obtained by the structure and the preparation method of the prior art multilayer solid wood composite substrate is easy to deform, so that the structure and the preparation method of the extremely thin multilayer solid wood composite substrate are lacking in the prior art.
Disclosure of Invention
The technical aim of the application is to at least overcome one technical problem and provide a multilayer solid wood composite substrate with thinner thickness.
In one aspect of the application, an extremely thin multilayer solid wood composite substrate is provided, comprising a short core layer and a long core layer which are stacked at intervals layer by layer, wherein the total veneer layer number of the short core layer and the long core layer is 3, 5 or 7, the thickness of the substrate is 2.0-5.0mm, the short core layer comprises a plurality of short core veneers which are adjacently arranged along the length direction of the substrate, the long core layer comprises one or a plurality of long core veneers which are adjacently arranged along the width direction of the substrate, and the thickness of the short core layer is smaller than or equal to the long core layer.
In some embodiments, the long core layer has a thickness of 0.8-1.2mm.
In some embodiments, the thickness of the short core layer is 0.3-0.8mm.
In some embodiments, when the total veneer layer number of the short core layer and the long core layer is 5 layers, the thickness of the short core layer and the long core layer is equal.
In some embodiments, the top and bottom layers of the substrate in the thickness direction are both the short core layers.
In some embodiments, the air-dry density of the material of the short core layer is greater than the air-dry density of the material of the long core layer.
In a second aspect of the present application, there is provided a method for preparing the aforementioned extremely thin multilayer solid wood composite substrate, comprising the steps of:
placing veneer strips with the surfaces coated with adhesives along the x-axis direction, and adjacently arranging a plurality of veneer strips along the y-axis direction to form a transverse layer with a certain breadth;
secondly, placing the veneer strips coated with the adhesive on the surface of the transverse layer along the y-axis direction, and adjacently arranging a plurality of veneer strips along the x-axis direction to form a longitudinal layer with a certain breadth;
step three, repeating step one on the longitudinal layer,
or repeating the first step and the second step for one to two times, and then repeating the first step to obtain a blank material;
step four, pressing the assembly material to obtain a pressed blank;
and fifthly, cutting the pressed blank to obtain the base material.
In some embodiments, in step five, the cutting direction is the y-axis direction.
In some embodiments, the x-axis direction is perpendicular to the y-axis direction.
In a third aspect of the present application, there is provided a floor board prepared by using the aforementioned ultra-thin multi-layer solid wood composite substrate, comprising a surface board and a back board respectively coated on the surface and the back of the substrate by means of bonding, wherein the thickness of the surface board is 0.6-1.0mm, and the thickness of the back board is 0.6-1.0mm.
In summary, compared with the prior art, the structure of the ultrathin multi-layer solid wood composite substrate is designed to include the stacked short core layer and long core layer which are spaced layer by layer, the short core layer comprises a plurality of short core single plates which are adjacently arranged along the length direction of the substrate, the long core layer comprises one or a plurality of long core single plates which are adjacently arranged along the width direction of the substrate, and the thickness of the short core layer is further limited to be smaller than or equal to that of the long core layer, so that the substrate which is flat, difficult to warp and deform and relatively thin can be obtained.
Further, by defining the surface layer and the bottom layer of the substrate in the thickness direction as short core layers, and the thickness of the short core layers is smaller than or equal to that of the long core layers, the tensile force between the long core layers and the short core layers can be balanced, so that the purpose of optimizing the stability of the substrate is achieved.
Still further, the substrate tiling can be optimized by defining the material of the short core to have a greater air-dry density than the material of the long core (f w ) Bending resistance (f) l ) And the deformation resistance of the surface plate and the back plate is improved, and the flatness of the glued surface is improved, and the supporting effect on the surface plate and the back plate is improved. Meanwhile, the density of the materials used for the short core layer and the long core layer is set, and the locking force of the locking structure after the locking floor is manufactured can be optimized, so that the locking connection of adjacent floor blocks is more stable.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic diagram of a step one of the embodiment of the present application.
Fig. 2 is a schematic diagram of a second step of the embodiment of the present application.
Fig. 3 is a schematic diagram of a third step of the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a substrate with a three-layer structure according to an embodiment of the present application.
In the figure: 100. base material 100a, assembly material 100b, pressed blank 101, veneer strips 110, transverse layers 120, longitudinal layers 201, short core veneers 202, long core veneers 210, short core layers 220, long core layers.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
Examples
As one embodiment of the method of preparing the ultrathin multi-layer solid wood composite substrate 100 of the application, it includes the following steps.
In the first step, referring to fig. 1, a veneer strip 101 coated with an adhesive on the surface is placed along the x-axis direction, and a plurality of veneer strips 101 are adjacently arranged along the y-axis direction, so as to form a transverse layer 110 with a certain width. The length of the single-strip bar 101 constitutes the dimension in the x-axis direction of the transverse layer 110, and the total width of the spliced plurality of single-strip bars 101 constitutes the dimension in the y-axis direction of the transverse layer 110.
In a second step, referring to fig. 2, on top of the transverse layer 110, the veneer strips 101 coated with adhesive on the surface are placed along the y-axis direction, and a plurality of veneer strips 101 are adjacently arranged along the x-axis direction to form a longitudinal layer 120 with a certain width. The length of the single-strip bar 101 constitutes the dimension in the y-axis direction of the longitudinal layer 120, and the total width of the spliced plurality of single-strip bars 101 constitutes the dimension in the x-axis direction of the longitudinal layer 120. Since the surface of each veneer strip 101 is coated with an adhesive, the transverse layer 110 and the longitudinal layer 120 are bonded by the adhesive.
The veneer strips 101 may be any material used in the art to prepare veneers of multilayer composite substrates, including, but not limited to, eucalyptus, poplar, oldham, oak, and ash. The material of the veneer strips 101 used to form the transverse layers 110 may be the same as or different from the material of the veneer strips 101 used to form the longitudinal layers 120.
The single board strip 101 has a certain width and length, is rectangular, and has dimensions not limited to, including but not limited to specifications of 1200mm (length) ×120mm (width), 1200mm (length) ×150mm (width), 1500mm (length) ×150mm (width), or 2100mm (length) ×210mm (width). The thickness of the veneer strips 101 is 0.3-1.2mm, and the thickness of the veneer strips 101 used to form the transverse layer 110 may be the same as or different from the thickness of the veneer strips 101 used to form the longitudinal layer 120.
The single board strip 101 may be obtained in a manner known in the art, including but not limited to, skiving a board of the same gauge, or skiving a log followed by cutting to a target gauge. The adhesive applied to the surface of veneer strip 101 is preferably a heat-curable adhesive, including but not limited to melamine adhesive.
Step three, referring to fig. 3, step one is repeated on top of the longitudinal layer 120, in other words, a transverse layer 110 is formed on top of the longitudinal layer 120, so as to form a three-layer structure of the assembly material 100a consisting of the transverse layer 110, the longitudinal layer 120 and the transverse layer 110.
In other embodiments, the first and second steps are repeated once and then the first step is repeated once again, thereby forming the build-up material 100a having a five-layer structure consisting of the transverse layer 110-the longitudinal layer 120-the transverse layer 110.
In other embodiments, the first and second steps are repeated twice, and then the first step is repeated again, thereby forming the build-up material 100a having a seven-layer structure consisting of the transverse layer 110-longitudinal layer 120-transverse layer 110.
Step four, the pack material 100a is pressed to obtain a pressed blank 100b. The pressing process depends on the adhesive used, including but not limited to, pressing with a process of 110-120 ℃ (pressing temperature), 10-12MPa (pressing pressure), 8-10min (pressing time). Compression of 3-5% of the total thickness may occur during pressing, but compression may rebound during cooling, so thickness errors due to compression may be ignored in calculating the thickness of the substrate 100.
Step five, cutting the pressed blank 100b to obtain the substrate 100. The cuts may be in the x-axis direction, the y-axis direction, or at any other angle. Preferably, the x-axis direction and the y-axis direction are perpendicular to each other, and the cutting direction is the y-axis direction.
The reader will understand that the number of layers of the pressed blank 100b is the base layer, and the veneer strips 101 of the first and last layers are disposed along the x-axis direction, so that the cutting direction determines the structure of the substrate 100. Specifically, fig. 4 shows a structure of the base material 100 obtained by cutting the pressed blank 100b in the y-axis direction. After the transverse layer 110 is cut in the y-axis direction, the veneer strips 101 are cut into short core veneers 201, and the plurality of short core veneers 201 are adjacently arranged to form a short core layer 210, so that the width of the short core veneers 201 forms the width of the substrate 100, and the total length of the splice of the plurality of short core veneers 201 forms the length of the substrate 100. After the longitudinal layer 120 is cut in the y-axis direction, the shape of the veneer strips 101 is preserved, and there may be a veneer strip 101 cut to preserve only a portion of the width, one or more long core veneers 202 are arranged adjacent to each other to form a long core layer 220, so that the length of the long core veneers 202 forms the length of the substrate 100, and the total width of the splice of one or more long core veneers 202 forms the width of the substrate 100. When the number of layers of the pressed blank 100b is 3, the structure of the substrate 100 is a short core layer 210-a long core layer 220-a short core layer 210, and so on for the pressed blank 100b, the structure of the substrate 100 can be analogized to that of the pressed blank 100b having a 5-layer or 7-layer structure. The thickness of the base material 100 is 2.0 to 5.0mm in accordance with the thickness of the pressed blank 100b.
Obviously, in this cutting method, the surface layer and the bottom layer in the thickness direction of the base material 100 are the short core layer 220 all the time.
Based on this preferred cutting pattern, it is more preferred that the thickness of the short core layer 210 be less than or equal to the long core layer 220. In other words, the thickness of the transverse layer 110 is less than or equal to the thickness of the longitudinal layer 120. Except that when the number of layers of the substrate 100 is 5, the thicknesses of the short core layer 210 and the long core layer 220 are preferably equal.
At the same time, the air-dry density of the material of the short core layer 210 is greater than the air-dry density of the material of the long core layer 220. In other words, the air-dry density of the material used to make the transverse layer 110 should be greater than the air-dry density of the material used to make the longitudinal layer 120.
Another case is that the cutting direction is along the x-axis direction. After the transverse layer 110 is cut in the x-axis direction, the shape of the veneer strips 101 is preserved, and there may be a veneer strip 101 cut to preserve only a portion of the width, one or more long core veneers 202 are arranged adjacent to each other to form a long core layer 220, so that the length of the long core veneers 202 forms the length of the substrate 100, and the total width of the splice of one or more long core veneers 202 forms the width of the substrate 100. After the longitudinal layer 120 is cut in the x-axis direction, the veneer strips 101 are cut into short core veneers 201, and the plurality of short core veneers 201 are adjacently arranged to form a short core layer 210, so that the width of the short core veneers 201 forms the width of the substrate 100, and the total length of the splice of the plurality of short core veneers 201 forms the length of the substrate 100. When the number of layers of the pressed blank 100b is 3, the structure of the substrate 100 is a long core layer 220-a short core layer 210, and so on for the pressed blank 100b, the structure of the substrate 100 is analogically a 5-layer or 7-layer structure.
In this cutting mode, the thickness of the short core layer 210 should also be smaller than that of the long core layer 220, and when the number of layers of the substrate 100 is 5, the thicknesses are equal. But at this time, the thickness of the transverse layer 110 should be made greater than or equal to the thickness of the longitudinal layer 120.
Likewise, the air-dry density of the material of the short core layer 210 should also be greater than the air-dry density of the material of the long core layer 220. But at this time, the air-dry density of the material used to make the transverse layer 110 should be made smaller than the air-dry density of the material used to make the longitudinal layer 120.
The surface sheet and the back sheet are adhered to the front and back surfaces of the substrate 100 to obtain a multilayer solid wood composite floor, and it is apparent that a surface sheet and a back sheet having a relatively thin thickness are preferably used for the purpose of reducing the production cost, but the thickness of the surface sheet and the back sheet is preferably 0.6 to 1.0mm in view of the sizing performance (prevention of glue penetration, etc.). For example, a rosette veneer with a thickness of 0.8mm was used as the face plate, and a eucalyptus veneer with a thickness of 0.8mm was used as the back plate. From the viewpoint of structural stability, it is preferable that the thickness of the face plate and the back plate be equal, but it is considered that the back plate often uses a material having a relatively low density, and thus, the thickness of the back plate may be 0.1mm larger than the thickness of the face plate.
The assembly scheme and the structural parameters of the pressed blanks of examples 1-7 are shown in table 1. The structural parameters of the substrates of examples 1-7 are shown in Table 2. The physicochemical properties of the floors produced from the substrates of examples 1 to 7 are shown in table 3. In table 3, the control group 1 is a 7-layer ultrathin solid wood composite floor prepared by a method and a structure in the prior art, specifically, 5 layers of eucalyptus rotary-cut veneers with surface sizing are stacked in a crisscross manner, a substrate with the width of 2100mm multiplied by 210mm and the thickness of 4.8mm is obtained after pressing and cutting, a rosewood veneer with the thickness of 0.8mm is pressed and stuck on the surface of the substrate to serve as a surface board, and a eucalyptus veneer with the thickness of 0.8mm is pressed and stuck on the back to serve as a back board, so that the floor with the thickness of 6.4mm is finally obtained. The control group 2 is a 7-layer solid wood composite floor with common thickness prepared by a method and a structure in the prior art, specifically, 5 layers of eucalyptus rotary-cut veneers with surface sizing are laminated in a crisscross manner, a substrate with the width of 2100mm multiplied by 210mm and the thickness of 12.6mm is obtained after pressing and cutting, a rosewood veneer with the thickness of 0.8mm is pressed and stuck on the surface of the substrate to serve as a surface board, and a eucalyptus veneer with the thickness of 0.8mm is pressed and stuck on the back to serve as a back board, so that the floor with the thickness of 14.2mm is finally obtained.
TABLE 1 assembly scheme for examples 1-7 and structural parameters of the pressed blanks
TABLE 2 structural parameters of the substrates of examples 1-7
TABLE 3 physicochemical Properties of the floors of examples 1-7
The foregoing description is for purposes of illustration and is not intended to be limiting. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the applicant be deemed to have such subject matter not considered to be part of the subject matter of the disclosed application.
Claims (10)
1. The utility model provides an extremely thin multilayer wood composite substrate, includes the short sandwich layer of layer by layer interval and long sandwich layer, short sandwich layer with the total veneer number of piles of long sandwich layer is 3, 5 or 7, its characterized in that, the thickness of substrate is 2.0-5.0mm, short sandwich layer includes a plurality of edges the short sandwich veneer that the length direction of substrate adjacently arranged, long sandwich layer includes one or more edges the width direction of substrate adjacently arranged long sandwich veneer, the thickness of short sandwich layer is less than or equal to long sandwich layer.
2. The ultrathin multi-layer solid wood composite substrate according to claim 1, wherein the thickness of the long core layer is 0.8-1.2mm.
3. The ultrathin multi-layer solid wood composite substrate according to claim 1, wherein the thickness of the short core layer is 0.3-0.8mm.
4. The ultrathin multi-layer solid wood composite substrate according to claim 1, 2 or 3, wherein when the total veneer number of the short core layer and the long core layer is 5 layers, the thicknesses of the short core layer and the long core layer are equal.
5. The ultrathin multi-layer solid wood composite substrate according to claim 1, wherein the surface layer and the bottom layer in the thickness direction of the substrate are both the short core layer.
6. The ultrathin multi-layer solid wood composite substrate according to claim 1, wherein the air-dry density of the material of the short core layer is greater than the air-dry density of the material of the long core layer.
7. A method for preparing the ultrathin multi-layer solid wood composite substrate according to claim 1, comprising the following steps:
placing veneer strips with the surfaces coated with adhesives along the x-axis direction, and adjacently arranging a plurality of veneer strips along the y-axis direction to form a transverse layer with a certain breadth;
secondly, placing the veneer strips coated with the adhesive on the surface of the transverse layer along the y-axis direction, and adjacently arranging a plurality of veneer strips along the x-axis direction to form a longitudinal layer with a certain breadth;
step three, repeating step one on the longitudinal layer,
or repeating the first step and the second step for one to two times, and then repeating the first step to obtain a blank material;
step four, pressing the assembly material to obtain a pressed blank;
and fifthly, cutting the pressed blank to obtain the base material.
8. The method according to claim 7, wherein in the fifth step, the cutting direction is the y-axis direction.
9. The method of claim 7, wherein the x-axis direction is perpendicular to the y-axis direction.
10. A floor made by using the ultrathin multi-layer solid wood composite substrate according to claim 1, which comprises a surface plate and a back plate respectively coated on the surface and the back of the substrate in a bonding mode, wherein the thickness of the surface plate is 0.6-1.0mm, and the thickness of the back plate is 0.6-1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311238100.3A CN117183498A (en) | 2023-09-25 | 2023-09-25 | Ultrathin multilayer solid wood composite substrate, preparation method thereof and floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311238100.3A CN117183498A (en) | 2023-09-25 | 2023-09-25 | Ultrathin multilayer solid wood composite substrate, preparation method thereof and floor |
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| Publication Number | Publication Date |
|---|---|
| CN117183498A true CN117183498A (en) | 2023-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311238100.3A Pending CN117183498A (en) | 2023-09-25 | 2023-09-25 | Ultrathin multilayer solid wood composite substrate, preparation method thereof and floor |
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| Country | Link |
|---|---|
| CN (1) | CN117183498A (en) |
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- 2023-09-25 CN CN202311238100.3A patent/CN117183498A/en active Pending
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