CN204712218U - High-performance fiber plate - Google Patents
High-performance fiber plate Download PDFInfo
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- CN204712218U CN204712218U CN201520163156.1U CN201520163156U CN204712218U CN 204712218 U CN204712218 U CN 204712218U CN 201520163156 U CN201520163156 U CN 201520163156U CN 204712218 U CN204712218 U CN 204712218U
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Abstract
This technology provides a kind of wearability good, the high-performance fiber plate that the cost produced with the fiberboard slab of sanding non-after hot pressing is low.It comprises the fiberboard slab with pre-hardening thickness, has modified adhesive layer on the upper and lower surface of fiberboard slab, and modified adhesive layer covers pre-hardening thickness, and modified adhesive immerses in pre-hardening thickness.
Description
Technical field
This technology relates to a kind of high performance fiberboard and manufacture method thereof, belongs to wood-based plate and manufactures field.
Background technology
Medium and high density fibre panel utilizes fast growing wood or rice wheat straw etc. to be primary raw material, by getting the raw materials ready, defibrator process, applying urea-formaldehyde resin adhesive, drying, mat formation, precompressed, hot pressing, cooling, the manufacture technics wood-based plate out such as sanding.Consolidated floor base material high density fiberboard requires that the superficial density after sanding must not lower than 1.0 g/cm
3, furniture surfacing plate substrate medium density fibre board (MDF) must not require lower than 0.8 g/cm
3.
When using urea-formaldehyde resin adhesive producd fibers plate, often there is " pre-hardening thickness " in slab its top layer after hot pressing in varying degrees.The formation mechenism of pre-hardening thickness is: send between heating platen at slab, when upper lower platen not yet completes closed boost process, slab surface fibre has received the heat from heating platen, and temperature sharply raises; When slab surface fibre temperature rises to urea-formaldehyde resin adhesive solidification temperature, namely the urea-formaldehyde resin adhesive imposing on fiber surface starts solidification, solidification process very fast (only 1 ~ 2s); Because slab surface fibre is very sensitive to heat transfer, when being not yet subject to hot press working pressure, urea-formaldehyde resin adhesive on its fiber solidifies, although and slab enter formal hot pressing after surface fibre be subject to hot press working pressure, but now cannot form bonding, adhesion process is only carried out at slab internal layer.
Top, plate face cured layer problem is worldwide technical barrier, and pre-hardening thickness is inevitable.Usual slab two sides pre-hardening thickness thickness is about 3 ~ 4mm.Pre-hardening thickness causes fiberboard plate face soft, and fiber easily peels off, and only has by sanding, except the pre-hardening thickness in board falling face, the dense layer of good bonding just can be made to be presented on plate face.This part that should form the volume of timber is become sanding powder, cause enterprise be difficult to produce in the thin plate, otherwise sanding loss shared by ratio larger.Therefore, Fibreboard Production enterprise urgently wishes to find a kind of effective way to solve pre-hardening thickness problem.Many scholars are studied this problem, propose following corrective measure: the hardening time of (1) adjustment urea-formaldehyde glue and curing rate; (2) slab table, the resin added of sandwich layer and glue kind is changed; (3) hot-pressing process curve is changed; (4) closed, the pressure rising time of pressing plate is reduced; (5) increase the moisture content of steel slab surface, reduce the moisture gradient inside and outside slab, heated up slowly in slab top layer.In actual production, most enterprises often adopts the method at sprinkling on the surface of mat, but effect is still undesirable.
Summary of the invention
This technology provides a kind of wearability good, the high-performance fiber plate that the cost produced with the fiberboard slab of sanding non-after hot pressing is low.
High-performance fiber plate described in this technology, it comprises the fiberboard slab with pre-hardening thickness, has modified adhesive layer on the upper and lower surface of fiberboard slab, and modified adhesive layer covers pre-hardening thickness, and modified adhesive immerses in pre-hardening thickness.
Above-mentioned high-performance fiber plate, modified adhesive is wear resistance adhesive agent.This wear resistance adhesive agent be by 80 orders more than the inorganic material such as silica, alundum (Al2O3), aluminium hydroxide or carborundum add and stir in low-molecular-weight resin and obtain, the weight ratio 1:7-20 of inorganic material and low-molecular-weight resin.Inorganic material selects the inorganic material such as existing silica, alundum (Al2O3), aluminium hydroxide or carborundum on market, and kind is not limit, and particle diameter is generally more than 80 orders.Low-molecular-weight resin all selects the market ripes such as Lauxite, phenolic resins, melamine resin and modified resin thereof.Use this modified adhesive, effectively can improve the wearability of high-performance fiber plate.
Above-mentioned high-performance fiber plate, long 2.44m, wide 1.22m, thick 2mm-20mm.
The beneficial effect of this technology: this technology directly with the fiberboard slab of sanding non-after hot pressing for raw material, pre-hardening thickness in Fibreboard Production is made full use of, reduce fiber loss, directly produce high-performance fiber panel products, reduce production cost, and modified adhesive layer is set, the defects such as effective solution fiberboard hardness is low, wear no resistance.
The difficult problem that this technology is brought for fibreboard surface pre-hardening thickness simultaneously, a kind of high performance fiberboard preparation method is proposed, the method can remove the sanding operation in Fibreboard Production process from, pre-hardening thickness in Fibreboard Production is made full use of, reduce fiber loss, the defects such as the high-performance fiber panel products directly produced, can also reduce production cost simultaneously, and effective solution fiberboard hardness is low, wear no resistance.
The manufacture method of this high-performance fiber plate, comprises the steps: a, carries out vacuum cleaning to the upper and lower surface of the fiberboard slab of sanding non-after hot pressing; B, to slab upper and lower surface respectively showering modified adhesive predrying to applying glue face; C, the sheet material made a good job of in advance is placed on cold press flattens, make the superficial density of sheet material reach 1.0g/cm
3above; D, upper and lower surface spraying modified adhesive to sheet material after flattening, make resin fill completely in plate surface, and e, that the sheet material after secondary applying glue is put into hot press is hot-forming.
The beneficial effect of this technology: by surperficial precompressed the sheet material made a good job of in advance is placed on cold press and flattens, by the fiber compacting in adhesive and pre-hardening thickness, make it adhere to securely on plate surface.The upper and lower pressing plate of cold press is polishing steel plate.The pressure of cold press is selected according to the requirement of superficial density, guarantees that superficial density reaches 1.0g/cm
3above.Sheet material after secondary applying glue put into hot press by sizing hot pressing to carry out sizing hot pressing by finger gauge requirements and make adhesive solidification, formation case hardness layer.Upper lower platen in hot press is polishing steel plate, to ensure the flat smooth on composite two sides.Finger gauge size customizes by the sheet metal thickness of market demands, and hot pressing pressure is limited to be depressed into finger gauge, and hot pressing time and temperature depend on be coated with adhesive type.Be generally, hot pressing pressure 0.8 ~ 1.5MPa, hot pressing temperature 110 ~ 180 DEG C, hot pressing time 10 ~ 40s/mm.The method can remove the sanding operation in Fibreboard Production process from, pre-hardening thickness in Fibreboard Production is made full use of, reduce fiber loss, the high-performance fiber panel products directly produced, production cost can also be reduced, the defects such as effective solution fiberboard hardness is low, wear no resistance simultaneously.
The manufacture method of above-mentioned high-performance fiber plate, modified adhesive refers to wear resistance adhesive agent, this wear resistance adhesive agent be by 80 orders more than the inorganic material such as silica, alundum (Al2O3), aluminium hydroxide or carborundum add and stir in low-molecular-weight resin and obtain, the weight ratio 1:7-20 of inorganic material and low-molecular-weight resin.Concrete addition depends on hardness required by material and wear-resisting revolution.Inorganic material selects the inorganic material such as existing silica, alundum (Al2O3), aluminium hydroxide or carborundum on market, and kind is not limit, and particle diameter is generally more than 80 orders.Low-molecular-weight resin all selects the market ripes such as Lauxite, phenolic resins, melamine resin and modified resin thereof.
The manufacture method of above-mentioned high-performance fiber plate, in step a during vacuum cleaning, the negative pressure of dust collecting system is-10kPa ~-20kPa.Adopt high vacuum dedusting absorption, guarantee that dedusting is thorough.
The manufacture method of above-mentioned high-performance fiber plate, time predrying in step b, put into drying machine and carry out drying to applying glue face at temperature 80-120 DEG C by slab, sticky slightly hand when steel slab surface hand is touched.
The manufacture method of above-mentioned high-performance fiber plate, in step b, is 300 ~ 420g/m to the resin added of slab upper surface or lower surface
2.
The manufacture method of above-mentioned high-performance fiber plate, in step e, the upper lower platen of hot press is polishing steel plate, and hot pressing pressure is 0.8 ~ 1.5MPa, and temperature is 110 ~ 180 DEG C, and the time is 10 ~ 40s/mm.
The manufacture method of above-mentioned high-performance fiber plate, in steps d, the upper surface of sheet material or lower surface resin added are 100-200g/m
2.Resin is filled completely in plate surface.
The manufacture method of above-mentioned high-performance fiber plate, slab is the fiberboard of non-sanding after hot pressing cuts, long 2.44m, wide 1.22m, and gauge is 5mm-25mm.
Accompanying drawing explanation
Fig. 1 is the process chart preparing high-performance fiber plate of this technology;
Fig. 2 is that slab drenches glue schematic diagram;
Fig. 3 is the product cross section schematic diagram of high-performance fiber plate.
In figure, 1 is modified adhesive, and 2 for drenching glue machine schematic diagram, and 3 is the fiberboard slab of non-sanding, and 4 is fibreboard surface pre-hardening thickness, and 5 is modified adhesive layer.
Detailed description of the invention
Specific features and the technological means of this technology is further illustrated below in conjunction with embodiment and accompanying drawing.
Embodiment 1
The thickness surface after hot pressing with pre-hardening thickness 4 is the fiberboard slab of 5mm, cut the slab 3 that rear length and width are of a size of 2.44m*1.22m, by high negative pressure system, vacuum suction dedusting (negative pressure of dust collecting system is-15kPa) is carried out to upper and lower two surfaces of slab.The particle diameter chosen at 90 object inorganic powder silica, the ratio of 1:10 is mixed in low-molecular-weight melamine resin by mass percentage, makes modified adhesive 1 after stirring.See Fig. 2, in slab 3 first surface (i.e. upper surface), (resin added is 300g/m by modified adhesive 1 showering to adopt pouring glue machine 2
2); Sending into temperature is carry out predrying in the drying machine of 80-100 DEG C, makes through drenching sticky slightly hand when the slab upper surface hand of glue touches; Adopting same procedure, second (i.e. lower surface) showering, predrying is carried out in slab upset, when sheet material second (i.e. lower surface) hand through drenching glue is touched, gluing hand slightly.The sheet material made a good job of in advance is placed on cold press that upper and lower pressing plate is polishing steel plate and flattens, make plate surface density reach 1.0g/cm
3.To upper and lower two surfaces of sheet material again even application modified adhesive (resin added is 140g/m
2), resin is filled completely in plate surface; After spraying is good, slab is put into hot press and make adhesive solidification, the upper lower platen in hot press is polishing steel plate, and adopt the finger gauge of 2mm to carry out sizing hot pressing, hot pressing temperature is 180 DEG C, and hot pressing time is 100s (20s/mm*5mm).Fibre board material after hot pressing terminates can carry out quality inspection, grades, packing and storing etc., be prepared into the fiberboard of high superficial density, shown in Figure 3, it comprises the fiberboard slab 3 with pre-hardening thickness 4, on the upper and lower surface of fiberboard slab 3, there is modified adhesive layer 5, modified adhesive layer 5 covers pre-hardening thickness 4, and modified adhesive immerses in pre-hardening thickness 4.
The fiberboard that the method is produced, superficial density reaches 1.0g/cm
3, surface abrasion resistance reaches more than 6000 turns, and all other physical mechanics properties all meet respective country standard, can be used as house ornamentation surface lining, packaging material etc.
Embodiment 2
The thickness surface after hot pressing with pre-hardening thickness 4 is the fiberboard slab of 16mm, cut the slab 3 that rear length and width are of a size of 2.44m*1.22m, by high negative pressure system, vacuum suction dedusting (negative pressure of dust collecting system is-20kPa) is carried out to upper and lower two surfaces of slab.The particle diameter chosen at 100 object inorganic powdered material alundum (Al2O3)s, the ratio of 1:15 is mixed in low-molecular-weight melamine resin by mass percentage, makes modified adhesive after stirring.See Fig. 2, in slab first surface (i.e. upper surface), (resin added is 350g/m by modified adhesive showering to adopt pouring glue machine
2); Sending into temperature is carry out predrying in the drying machine of 80-100 DEG C, makes through drenching sticky slightly hand when the slab upper surface hand of glue touches; Adopting same procedure, second (i.e. lower surface) showering, predrying is carried out in slab upset, when sheet material second (i.e. lower surface) hand through drenching glue is touched, gluing hand slightly.The sheet material made a good job of in advance is placed on cold press that upper and lower pressing plate is polishing steel plate and flattens, make plate surface density reach 1.2g/cm
3.To upper and lower two surfaces of slab again even application modified adhesive (resin added is 180g/m
2), resin is filled completely in plate surface; After spraying is good, slab is put into hot press and make adhesive solidification, the upper lower platen in hot press is polishing steel plate, and adopt the finger gauge of 12mm to carry out sizing hot pressing, hot pressing temperature is 180 DEG C, and hot pressing time is 25s/m.Fibre board material after hot pressing terminates can carry out quality inspection, grades, packing and storing etc., be prepared into the fiberboard of high superficial density, shown in Figure 3, it comprises the fiberboard slab 3 with pre-hardening thickness 4, on the upper and lower surface of fiberboard slab 3, there is modified adhesive layer 5, modified adhesive layer 5 covers pre-hardening thickness 4, and modified adhesive immerses in pre-hardening thickness 4.
The fiberboard that the method is produced, superficial density reaches 1.2g/cm
3, surface abrasion resistance reaches more than 8000 turns, and all other physical mechanics properties all meet respective country standard, can be used as fitment material for family, consolidated floor base material etc.
Embodiment 3
The thickness surface after hot pressing with pre-hardening thickness 4 is the fiberboard slab of 25mm, cut the slab 3 that rear length and width are of a size of 2.44m*1.22m, by high negative pressure system, vacuum suction dedusting (negative pressure of dust collecting system is-20kPa) is carried out to upper and lower two surfaces of slab.The particle diameter chosen at 120 object inorganic powdered material carborundum, the ratio of 1:15 is mixed in low-molecular-weight melamine resin by mass percentage, makes modified adhesive 1 after stirring.See Fig. 2, in slab 3 first surface (i.e. upper surface), (resin added is 400g/m by modified adhesive 1 showering to adopt pouring glue machine
2); Sending into temperature is carry out predrying in the drying machine of 80-100 DEG C, makes through drenching sticky slightly hand when the slab upper surface hand of glue touches; Adopting same procedure, second (i.e. lower surface) showering, predrying is carried out in slab upset, when sheet material second (i.e. lower surface) hand through drenching glue is touched, gluing hand slightly.The sheet material made a good job of in advance is placed on cold press that upper and lower pressing plate is polishing steel plate and flattens, make plate surface density reach 1.0g/cm
3.To upper and lower two surfaces of sheet material again even application modified adhesive (resin added is 200g/m
2), resin is filled completely in plate surface; After spraying is good, slab is put into hot press and make adhesive solidification, the upper lower platen in hot press is polishing steel plate, and adopt the finger gauge of 20mm to carry out sizing hot pressing, hot pressing temperature is 180 DEG C, and hot pressing time is 30s/m.Fibre board material after hot pressing terminates can carry out quality inspection, grades, packing and storing etc., be prepared into the fiberboard of high superficial density, shown in Figure 3, it comprises the fiberboard slab 3 with pre-hardening thickness 4, on the upper and lower surface of fiberboard slab 3, there is modified adhesive layer 5, modified adhesive layer 5 covers pre-hardening thickness 4, and modified adhesive immerses in pre-hardening thickness 4.
The fiberboard that the method is produced, superficial density reaches 1.5g/cm
3, surface abrasion resistance reaches more than 9000 turns, and all other physical mechanics properties all meet respective country standard, can be used as house ornamentation table top and furniture table, packaging material etc.
In brief, the manufacture method of this technology is: (length and width are of a size of 2.44m*1.22m to the fiberboard blank plate of non-sanding after hot pressing being cut, gauge is 5mm-25mm), by high negative pressure system, vacuum suction dedusting (negative pressure of dust collecting system is-10kPa ~-20kPa) is carried out to upper and lower two surfaces of slab.By drenching glue machine, by low-molecular-weight resin (Lauxite, melamine resin, phenolic resins or their modified resin) showering that is mixed with inorganic powdered material, in slab first surface (i.e. upper surface), (resin added is 300-420g/m
2); Carry out predrying in feeding drying machine, sticky slightly hand when the slab upper surface hand through drenching glue is touched; Upset slab carries out second (i.e. lower surface) showering, predrying, glues hand slightly when sheet material second (i.e. lower surface) hand through drenching glue is touched; The sheet material made a good job of in advance is placed on cold press and flattens, by the fiber compacting in adhesive and pre-hardening thickness.Pressure of colding pressing is selected according to the requirement of superficial density, guarantees that superficial density reaches 1.0g/cm
3above.The upper and lower pressing plate of cold press is polishing steel plate.To upper and lower two surfaces of sheet material again even application modified adhesive (resin added is 100-200g/m
2), resin is filled completely in plate surface; After spraying is good, sheet material is put into hot press to require to carry out sizing hot pressing according to finger gauge and make adhesive solidification (finger gauge is of a size of the sheet metal thickness of market demands, hot pressing temperature is 110 ~ 180 DEG C, hot pressing time is 10 ~ 40s/mm), upper lower platen in hot press is polishing steel plate, to ensure the flat smooth on composite two sides.Fiberboard after hot pressing terminates can carry out quality inspection, grade, pack and storage etc., is prepared into high-performance fiber plate.
Employing said method can remove the sanding operation in Fibreboard Production process from, pre-hardening thickness in Fibreboard Production is made full use of, reduce fiber loss, the high-performance fiber panel products directly produced, also reduce production cost simultaneously, the defect that effective solution fiberboard surface-density is little, hardness is low, wear no resistance, can be widely used in the occasion had higher requirements to artifical board material to such as construction material, furniture material, flooring material etc.
The advantage of this technology is that fibrillation plate slab need not carry out sand and cut processing, Processes and apparatus is simple, do not need to adjust fibrillation board assembly line master operation, sanding operation that only need be higher by the cost in fibrillation board assembly line is removed, and adds dedusting, drenches glue, colds pressing, the operation such as hot pressing.With the high-performance fiber plate that the method manufactures, its superficial density can reach 1.0g/cm
3above, fiberboard has the performances such as higher surface abrasion resistance and water resistance simultaneously.This preparation method and obtained product can improve the comprehensive serviceability of wood materials greatly, reduce production cost, improve technology content and the added value of composite wooden material.
Claims (3)
1. a high-performance fiber plate, is characterized in that: it comprises the fiberboard slab with pre-hardening thickness, has modified adhesive layer on the upper and lower surface of fiberboard slab, and modified adhesive layer covers pre-hardening thickness, and modified adhesive immerses in pre-hardening thickness.
2. high-performance fiber plate as claimed in claim 1, is characterized in that: modified adhesive is wear resistance adhesive agent.
3. high-performance fiber plate as claimed in claim 1, is characterized in that: long 2.44m, wide 1.22m, thick 2mm-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520163156.1U CN204712218U (en) | 2015-03-23 | 2015-03-23 | High-performance fiber plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520163156.1U CN204712218U (en) | 2015-03-23 | 2015-03-23 | High-performance fiber plate |
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| Publication Number | Publication Date |
|---|---|
| CN204712218U true CN204712218U (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520163156.1U Expired - Fee Related CN204712218U (en) | 2015-03-23 | 2015-03-23 | High-performance fiber plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN204712218U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500680A (en) * | 2021-06-16 | 2021-10-15 | 千年舟新材科技集团股份有限公司 | Light-weight high-strength veneer-faced oriented poplar shaving board and preparation method thereof |
| CN114179186A (en) * | 2021-12-16 | 2022-03-15 | 南京林业大学 | Preparation method of composite artificial board cured by microwave |
-
2015
- 2015-03-23 CN CN201520163156.1U patent/CN204712218U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500680A (en) * | 2021-06-16 | 2021-10-15 | 千年舟新材科技集团股份有限公司 | Light-weight high-strength veneer-faced oriented poplar shaving board and preparation method thereof |
| CN113500680B (en) * | 2021-06-16 | 2022-05-24 | 千年舟新材科技集团股份有限公司 | Light-weight high-strength veneer-faced oriented poplar shaving board and preparation method thereof |
| CN114179186A (en) * | 2021-12-16 | 2022-03-15 | 南京林业大学 | Preparation method of composite artificial board cured by microwave |
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