CN211590508U - Cracking-resistant ecological plate assembly - Google Patents
Cracking-resistant ecological plate assembly Download PDFInfo
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- CN211590508U CN211590508U CN201921620720.2U CN201921620720U CN211590508U CN 211590508 U CN211590508 U CN 211590508U CN 201921620720 U CN201921620720 U CN 201921620720U CN 211590508 U CN211590508 U CN 211590508U
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Abstract
The utility model provides a resistant ecological plate group of checking up, this group of group down includes from last in proper order: the front side is impregnated with the glued membrane paper layer, the front side is able to bear the fissures and the front side wood skin layer, the front side middle plate layer, the core plate layer, the back side middle plate layer, the back side wood skin layer, the back side is able to bear the fissures and the back side is impregnated with the glued membrane paper layer; the front crack-resistant layer and the back crack-resistant layer are made of isotropic materials.
Description
Technical Field
The utility model belongs to the panel field of making especially relates to a resistant ecological plate group base of checking up.
Background
With the development of times, the multifunctional board has completely exposed corners on the market. The ecological board, also called melamine impregnated bond paper veneer artificial board, is a decorative board made by laying bond paper impregnated with amino resin on a plywood or a joinery board base material and hot-pressing. The ecological plate has the advantages of high temperature resistance, acid and alkali resistance, moisture resistance, fire resistance and the like, and is popular with consumers.
Impregnated paper faced plywood and core-board are prone to surface cracking when used in the northern environment, and cannot be sold in the northern market. The national standard requires that the crack resistance of the surface of the ecological plate reaches more than 4 grades, but the products of most manufacturers can not meet the performance requirement so far.
Therefore, the cracking resistance is always a difficult problem to break through in the plate manufacturing industry. For example, patent application No. 201710254261.X, entitled "a crack-resistant multifunctional impregnated bond paper veneer artificial board and manufacturing method thereof", provides a method which is tedious in production, high in production cost and not suitable for factory production.
SUMMERY OF THE UTILITY MODEL
The utility model provides a resistant ecological plate group of checking up, this group of group down includes from last in proper order: the front side is impregnated with the glued membrane paper layer, the front side is able to bear the fissures and the front side wood skin layer, the front side middle plate layer, the core plate layer, the back side middle plate layer, the back side wood skin layer, the back side is able to bear the fissures and the back side is impregnated with the glued membrane paper layer; the front crack-resistant layer and the back crack-resistant layer are made of isotropic materials.
In some embodiments of the present invention, a first glue layer is formed between the front wood skin layer and the front middle wood layer, a second glue layer is formed between the front middle wood layer and the core wood layer, and a third glue layer is formed between the core wood layer and the back middle wood layer; and a fourth glue layer is formed between the back middle board layer and the back wood veneer layer.
In some embodiments of the present invention, the crack resistant layer is selected from the group consisting of impregnated kraft paper, impregnated non-woven fabric, impregnated fiberglass fabric.
In some embodiments of the present invention, the wood used in the core layer is cedar, poplar, pine, tung, nanmu, rubber wood, or malachite wood, and the thickness of the wood is 1.0cm to 1.3 cm.
In some embodiments of the present invention, the wood used in the middle plate layer is poplar wood or eucalyptus wood, and the thickness of the wood is 2.4mm to 3.2 mm.
The utility model discloses in some embodiments, the used material of wooden skin layer be poplar skin, science and technology veneer, its thickness is 0.5~1.0 mm.
In some embodiments of the present invention, the first glue layer, the second glue layer, the third glue layer and the fourth glue layer are formaldehyde-free soybean glue layers.
In some embodiments of the present invention, the top surface and the bottom surface of the front cracking-resistant layer are respectively bonded to the front impregnated adhesive film paper layer through an adhesive layer; the top surface and the bottom surface of the back crack-resistant layer are respectively bonded with the back impregnated adhesive film paper layer through an adhesive layer.
In some embodiments of the present invention, the adhesive layer is a melamine adhesive layer; preferably, the melamine adhesive layer is a modified melamine adhesive layer; the utility model discloses a utility model people takes to toughen and modify the used melamine adhesive of resistant layer of checking crack to carry out, further improves the anti-cracking performance of ecological plate, in some preferred embodiments of the utility model, the melamine adhesive in add one or several of polyvinyl acetate emulsion, carboxybutylbenzene emulsion, styrene-acrylic emulsion, polyethylene-vinyl acetate emulsion, polyvinyl alcohol solution as the toughening agent of gluing agent; thus, the method for modifying the adhesive used for impregnating the adhesive film paper layer to improve the cracking resistance is avoided, and the beneficial effects are as follows: (1) the excellent performances of the surface layer dipped glue film paper layer, especially the scratch resistance and the cigarette burning resistance, are reserved; (2) avoids the influence of the toughening agent on the appearance performance such as surface texture, color and luster and the like.
In some embodiments of the invention, the core grain is mutually perpendicular to the grain of the front middle sheet layer and the back middle sheet layer.
Through the utility model provides a resistant ecological plate group base of checking a crack, the resistant ecological plate of checking a crack of acquisition has following beneficial effect: 1. the cracking resistance grade is high and reaches 5 grades; (detection according to 4.36 in GB/T17657-2013); 2. the surface bonding strength reaches 1.4-1.8 MPa; (detection according to 4.15 in GB/T17657-2013); 3. the formaldehyde release amount is less than or equal to 0.1 mg/L; (detection according to 4.59 in GB/T17657-2013); 4. the cold and hot resistance cycle test shows that the product has no defects of crack, blister, discoloration, wrinkling and the like for more than 10 cycles; (detection according to 4.31 in GB/T17657-2013).
Drawings
Fig. 1 is the utility model provides a structural schematic diagram of resistant ecological plate group spare that splits.
Detailed Description
The embodiment of the utility model provides a resistant ecological plate group of checking up, this group of group down includes from last in proper order: a front impregnated adhesive film paper layer 10, a front cracking-resistant layer 20, a front veneer layer 30, a front middle plate layer 40, a core plate layer 50, a back middle plate layer 60, a back veneer layer 70, a back cracking-resistant layer 80 and a back impregnated adhesive film paper layer 90;
considering that the ecological plate provided by the prior art has poor crack resistance, the main reason is the anisotropy of the veneer layer, and particularly in the dry environment in the north, the shrinkage of the veneer causes the plate surface to crack; the principle of the utility model is that a layer of isotropic material is added on the wood veneer layer, thus solving the problem of cracking of the board surface; specifically, the front cracking-resistant layer and the back cracking-resistant layer provided by the utility model are made of isotropic materials; in some embodiments of the present invention, the top surface and the bottom surface of the front cracking-resistant layer are respectively bonded to the front impregnated adhesive film paper layer through an adhesive layer; the top surface and the bottom surface of the back cracking-resistant layer are respectively bonded with the back impregnated adhesive film paper layer through an adhesive layer; in some embodiments of the present invention, the adhesive layer is a melamine adhesive layer; optionally, the crack-resistant layer is selected from impregnated kraft paper, impregnated non-woven fabric and impregnated fiberglass fabric.
In some embodiments of the present invention, a first glue layer 34 is formed between the front wood skin layer 30 and the front middle board layer 40, a second glue layer 45 is formed between the front middle board layer 40 and the core board layer 50, and a third glue layer 56 is formed between the core board layer 50 and the back middle board layer 60; a fourth glue layer 67 is formed between the back middle board layer 60 and the back wood veneer layer 70; in this embodiment, the first glue layer, the second glue layer, the third glue layer and the fourth glue layer are all aldehyde-free soybean glue layers.
Optionally, the wood used in the core board layer is fir, poplar, pine, tung, phoebe, rubber wood or malachite wood, and the thickness of the wood is 1.0 cm-1.3 cm;
optionally, the wood used in the middle plate layer is poplar wood or eucalyptus wood, and the thickness of the wood is 2.4 mm-3.2 mm; the wood veneer layer is made of poplar veneer and technical wood veneer, and the thickness of the wood veneer layer is 0.5-1.0 mm.
Through the utility model provides a resistant ecological plate group base of checking a crack, the resistant ecological plate of checking a crack of acquisition has following beneficial effect: 1. the cracking resistance grade is high and reaches 5 grades; (detection according to 4.36 in GB/T17657-2013); 2. the surface bonding strength reaches 1.4-1.8 MPa; (detection according to 4.15 in GB/T17657-2013); 3. the formaldehyde release amount is less than or equal to 0.1 mg/L; (detection according to 4.59 in GB/T17657-2013); 4. the cold and hot resistance cycle test shows that the product has no defects of crack, blister, discoloration, wrinkling and the like for more than 10 cycles; (detection according to 4.31 in GB/T17657-2013).
Illustratively, various methods of making crack resistant ecological boards are provided below:
example 1
The preparation method of the crack-resistant ecological plate specifically comprises the following steps:
the production steps of the crack-resistant ecological plate are as follows:
step 1, coating aldehyde-free soybean glue on the side surface of a core plate batten, wherein the coating weight is 0.7 Kg/gauge plate, assembling, and carrying out hot pressing at 160 ℃ for 180s to obtain a core plate;
step 2, coating aldehyde-free soybean glue on the two sides of the core board, wherein the glue distribution amount is 1.4 +/-0.2 kg/piece, the middle board is assembled into 1 layer on each of the front side and the back side of the core board, and the grain of the core board is vertical to the grain of the middle board;
step 3, cold pressing the assembled plate at the unit pressure of 0.7MPa for 40-60min, and then hot pressing at the unit pressure of 0.65MPa for 17min at the temperature of 125 ℃;
step 4, performing greasing and sanding treatment on the base plate in the step 2, and then coating formaldehyde-free soybean glue on the two surfaces of the plate surface, wherein the glue distribution amount is 1.4 +/-0.2 kg/piece, and assembling a blank wood skin layer;
step 5, cold pressing the assembled plate, wherein the unit pressure is 0.6MPa, the time is 30min, the unit pressure of hot pressing is 0.65MPa, the time is 7min, and the temperature is 125 ℃;
step 6, performing greasing, edge cutting and sanding treatment on the semi-finished product in the step 4;
7, impregnating kraft paper and melamine impregnated adhesive film paper on the semi-finished product assembly in the step 5, and performing hot pressing at the unit pressure of 0.7MPa and the temperature of 123 ℃ for 7 min; the gum dipping amount of the dipped kraft paper is 120 percent;
the impregnated kraft paper is modified melamine impregnated kraft paper, and the specific preparation method of the modified melamine comprises the following steps: adding 4% of polyvinyl acetate emulsion into a melamine adhesive and uniformly stirring;
step 8, checking, packaging and warehousing;
the wood used by the core board layer is fir, and the thickness of the wood is 1.2 cm; the wood used by the middle plate layer is poplar, and the thickness of the wood is 2.8 mm; the wood veneer layer is made of poplar veneer, and the thickness of the wood veneer layer is 0.8 mm.
Example 2
Example 2 differs from example 1 in that the material used for the cracking-resistant layer in step 7 is an impregnated nonwoven fabric.
Example 3
The difference between the embodiment 3 and the embodiment 1 is that the process of pressing and pasting the veneer layer is different, glue is distributed on the two sides of the base plate in the step 4, and the glue distribution amount is increased to 1.8 +/-0.1 kg/piece.
Example 4
The difference between the embodiment 4 and the embodiment 1 is that the process of pressing and pasting the veneer layer is different, glue is distributed on the two sides of the base plate in the step 4, and the glue distribution amount is increased to 1.8 +/-0.1 kg/piece; and 7, using a material of the cracking-resistant layer as an impregnated non-woven fabric.
Comparative example 1
Comparative example 1 is different from example 1 in that the melamine-impregnated bond paper was directly laminated on the veneer substrate without laminating the cracking-resistant layer.
Comparative example 2
Comparative example 2 is different from example 1 in that the cracking resistant layer was not laminated and the amount of glue distribution was changed to 1.8 + -0.1 kg/sheet when the wood veneer layer was laminated.
Comparative example 3
Comparative example 3 is different from example 1 in that kraft paper not impregnated with melamine adhesive is used as a material for laminating the crack-resistant layer.
Comparative example 4
Comparative example 4 is different from example 1 in that the material used in the lamination of the crack-resistant layer is a nonwoven fabric which is not impregnated with a melamine adhesive.
Performing related detection on the finished product, wherein the detection results are shown in the following table 1
TABLE 1 statistical table of test data of examples and comparative examples
The detection results in table 1 show that the formaldehyde emission of the finished sample plate is less than or equal to 0.1mg/L, and the sample plate belongs to a green environment-friendly building material. The surface bonding strength reaches 1.4-1.8MPa, and the adhesive has better mechanical property. The results of the crack resistance tests, data and experimental phenomena of the examples reach grade 5, and the crack resistance test shows that the steel plate does not crack after being subjected to more than 10 times of cold and hot cycles and has excellent crack resistance. Comparative example 1, no crack-resistant material was used, so the surface lacked stress resistance, and could not provide toughness for the sheet, the crack-resistant rating was 3, and the sheet cracked after 3 times of the cold and hot cycle test; comparative example 2 does not use a crack-resistant material, but increases the glue application amount of the large skin, and increases certain toughness of the plate by increasing the thickness of the glue layer, but the effect is not improved well, the crack-resistant grade reaches 4 grade, and the plate can crack after 5 times of cold and heat cycle test; comparative examples 3 and 4 use kraft paper and non-woven fabric which are not impregnated with melamine adhesive, the toughness of the board is increased by the kraft paper and the non-woven fabric, the crack resistance is improved, the crack resistance grade reaches 4, but the surface bonding strength is poor, and the board cracks only in 0.7-0.8MPa after being tested for 8 times of cold and hot cycle resistance.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a resistant ecological plate group of splits, its characterized in that, this group of subassemblies from last down include in proper order:
the front side is impregnated with the glued membrane paper layer, the front side is able to bear the fissures and the front side wood skin layer, the front side middle plate layer, the core plate layer, the back side middle plate layer, the back side wood skin layer, the back side is able to bear the fissures and the back side is impregnated with the glued membrane paper layer;
the front crack-resistant layer and the back crack-resistant layer are made of isotropic materials.
2. The crack-resistant ecological plate assembly as claimed in claim 1, wherein a first glue layer is formed between the front wood skin layer and the front middle plate layer, a second glue layer is formed between the front middle plate layer and the core plate layer, and a third glue layer is formed between the core plate layer and the back middle plate layer; and a fourth glue layer is formed between the back middle board layer and the back wood veneer layer.
3. The crack-resistant ecological plate assembly as claimed in claim 1, wherein the crack-resistant layer is selected from the group consisting of impregnated kraft paper, impregnated non-woven fabric, impregnated fiberglass fabric.
4. The crack-resistant ecological board assembly as claimed in claim 1, wherein the core board layer is made of wood selected from the group consisting of fir, poplar, pine, tung, phoebe, rubber wood and malachite wood, and has a thickness of 1.0-1.3 cm.
5. The crack-resistant ecological plate assembly as claimed in claim 1, wherein the wood used in the middle plate layer is poplar wood or eucalyptus wood, and the thickness of the wood is 2.4 mm-3.2 mm.
6. The crack-resistant ecological plate assembly as claimed in claim 1, wherein the wood veneer layer is made of poplar veneer and technical wood veneer, and the thickness of the wood veneer layer is 0.5-1.0 mm.
7. The crack-resistant ecological plate assembly of claim 2, wherein the first glue layer, the second glue layer, the third glue layer and the fourth glue layer are all aldehyde-free soybean glue layers.
8. The crack-resistant ecological plate assembly as claimed in claim 1, wherein the top surface and the bottom surface of the front crack-resistant layer are respectively bonded to the front impregnated cellophane layer through an adhesive layer; the top surface and the bottom surface of the back crack-resistant layer are respectively bonded with the back impregnated adhesive film paper layer through an adhesive layer.
9. The crack-resistant ecological plate assembly according to claim 8, wherein the adhesive layer is a melamine adhesive layer.
10. The crack resistant ecological plate assembly of claim 1, characterized in that the grain of the core plate layer is mutually perpendicular to the grain of the front middle plate layer and the back middle plate layer.
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| CN201921620720.2U CN211590508U (en) | 2019-09-26 | 2019-09-26 | Cracking-resistant ecological plate assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659681A (en) * | 2020-12-16 | 2021-04-16 | 柳州市鹏森木业加工有限公司 | High-strength wear-resistant artificial board and preparation method thereof |
| CN113021537A (en) * | 2021-03-23 | 2021-06-25 | 南京林业大学 | Production process of wood-based paper plywood |
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2019
- 2019-09-26 CN CN201921620720.2U patent/CN211590508U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659681A (en) * | 2020-12-16 | 2021-04-16 | 柳州市鹏森木业加工有限公司 | High-strength wear-resistant artificial board and preparation method thereof |
| CN113021537A (en) * | 2021-03-23 | 2021-06-25 | 南京林业大学 | Production process of wood-based paper plywood |
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