CN107243957A - A kind of preparation method for being cold-pressed multilayered wood laminated timber - Google Patents
A kind of preparation method for being cold-pressed multilayered wood laminated timber Download PDFInfo
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- CN107243957A CN107243957A CN201710314653.0A CN201710314653A CN107243957A CN 107243957 A CN107243957 A CN 107243957A CN 201710314653 A CN201710314653 A CN 201710314653A CN 107243957 A CN107243957 A CN 107243957A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a kind of preparation method for being cold-pressed multilayered wood laminated timber, processing step is as follows：5~50mm of fast growing wood thickness, moisture content is 10~20%, plastics 1~10mm of plate thickness, and preparation process is, (1) adhesive is configured according to a certain percentage and in fast growing wood top sizing, (2) after assembly, precuring 2~30 minutes, pressure is 1~5MPa, (3) cold curing 1~10 hour, pressure is 5~12MPa, and (4) are displayed 1~15 day at room temperature, obtains being cold-pressed multilayered wood laminated timber.The present invention is using the fast growing woods such as China fir, Eucalyptus or poplar and plastic layer Cold-press adhesion preparation intensity are high, moisture absorption penetrability is small, good stability of the dimension wooden laminated timber, it can be applied to as wooden engineering material in commercial timber buildings field, can also be applied to timber floor, wooden footway, wall decorative panel etc..Cold-press method operation relative ease is easy, energy consumption is small, the potential with large-scale production.
Description
Technical field
The invention belongs to engineering and building material field, and in particular to a kind of preparation side of cold pressing multilayered wood laminated timber
Method.
Background technology
With the exhaustion of major diameter log resource, the comprehensive utilization of the timber such as small dimension wood, fast growing wood and low-quality log turns into
The hot issue of engineering construction area research.Material is soft, low intensity fast growing wood can be made into high-strength laminated veneer lumber
For building structure and engineering field, such as I-shaped floor joist, beam column, sleeper and load bearing wall.But in laminated veneer lumber
In material preparation technology, compared to pressure sintering, cold-press method operation relative ease is easy, energy consumption is small, with larger advantage.In addition,
Improve its insect prevention, waterproof, the modification of weather resistance and brushing impregnation technology complicated, cause production cost high, limiting should
Use scope.
Wood plastic composite is wood fibre or powder is matrix and high molecular polymer such as polyethylene, polyvinyl chloride and poly-
Extruded after propylene etc. is compound, be molded into sheet material section bar, possessed wear-resisting insect prevention, the water-fast performance such as weather-proof, set available for social base
Apply construction.A kind of wood plastic composite of CN106189177A disclosure of the invention and preparation method thereof, the inventive method is by polyurethane
After foamed plastics is mixed with wood powder, add modifying agent and carry out coupling reaction and esterification, wood powder is filled out in the form of reinforcing agent
In the abscess for entering polyurethane foam plastics.The polyurethane of the invention/wood powder foam wood/plastic composite material, with polyurethane and wood powder
Advantage, water absorption rate is low, density is low, light weight, but compressive strength is high, is more than 11.7 times of polyurethane foam plastics.Should
The foam wood/plastic composite material of invention belongs to environmentally friendly, resource friendly and degradable material, can apply to as built
The fields such as material, ornament materials, furniture, sheet material, packaging material, toy, auto parts.However, treating of wood is powder by the invention
End is combined with plastics, is broken the ring original floral designs of timber, is lost the natural aesthetic feeling of timber.
The content of the invention
The characteristics of summary laminated veneer lumber and wood plastic composite, height is had concurrently it is an object of the invention to provide one kind
By force, the preparation method of water-fast, high-dimensional stability function cold pressing multilayered wood laminated timber.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of preparation method for being cold-pressed multilayered wood laminated timber, processing step is as follows：
1) selection：Choose the plastic plate that thickness is 5~50mm wood single-plates or sawn timber and thickness is 1~10mm；
2) dry：It is 10~20% by the wood single-plate or sawn timber moisture control；
3) gluing：In the wood single-plate or sawn timber top sizing；
4) assembly：Assembly is carried out by the wood single-plate or with plastic plate；
5) precuring：During assembly, precuring is carried out to assembly, preload pressure is 1~5MPa, 2~30 points of precompressed
Clock；
6) it is cold-pressed：At room temperature, 5~12MPa of pressure cold pressings solidify 1~10 hour assembly after precuring；
7) conserve：Display at room temperature 5~10 days.
Wood single-plate or the sawn timber raw material are China fir, Eucalyptus or poplar.
The plastic plate is polyethylene board, polyvinyl chloride panel or polypropylene board.
The step 3) top sizing amount be 240~360g/m2。
The adhesive that the top sizing is used is gluing for epoxyn, polyurethane adhesive or isocyanates
Agent.
The epoxyn is dissolved in after the mixed solvent of ketone, aromatic hydrocarbon, alcohol by E51 epoxy resin to be added admittedly
Agent polyethylene polyamine, plasticizer phthalic acid dibutyl ester are formulated.
The polyurethane adhesive is 101 polyurethane resins.
The advantage of the invention is that：
A kind of preparation method of cold pressing multilayered wood laminated timber of the present invention, it is reasonable in design.Utilize China fir, Eucalyptus or poplar
Prepare that intensity is high, moisture absorption penetrability is small, size is steady after constant speed Greenwood veneer or sawn timber applying glue precuring with plastic layer Cold-press adhesion
Qualitative good wooden laminated timber, the number of plies is more, the commercial timber buildings that can be applied to as wooden engineering material of timber thickness are led
In domain, three layers or relatively thin timber floor, wooden footway, wall decorative panel etc. can be applied to.Relative to traditional pressure sintering, cold-press method behaviour
Make that relative ease is easy, energy consumption is small.When applying to wooden engineering material field, this method is to adhesive quality and fast growing wood and modeling
Bed of material interface glue performance requires higher, therefore, it is necessary to the epoxyn that use cost is higher, glue performance is strong, poly-
Urethane adhesive, isocyanate adhesive, but for engineering material, cost is also suitable.
Brief description of the drawings
Fig. 1 is the glued construction schematic diagram that the embodiment of the present invention 1 is cold-pressed multilayered wood laminated timber.
Fig. 2 is Fig. 1 profile.
In Fig. 1 and Fig. 2,1：Poplar quarter-sawed lumber, 2：Polyethylene board, 3：Epoxy glue layer.
Fig. 3 is the glued construction schematic diagram that the embodiment of the present invention 2 is cold-pressed multilayered wood laminated timber.
Fig. 4 is Fig. 3 profile.
In Fig. 3 and Fig. 4,1：China fir quarter-sawed lumber, 2：Polyvinyl chloride panel, 3：Polyurethane resin glue-line.
Fig. 5 is the glued construction schematic diagram that the embodiment of the present invention 3 is cold-pressed multilayered wood laminated timber.
Fig. 6 is Fig. 5 profile.
In Fig. 5 and Fig. 6,1：Eucalyptus quarter-sawed lumber, 2：Polypropylene board, 3：Isocyanates glue-line.
Embodiment
The embodiment of the present invention is elaborated with accompanying drawing with reference to embodiments, but not constituted to the present invention
The limitation of claims.
According to GB/T 20241-2006 laminated veneer lumbers, its important performance indexes is as follows：
| Experimental project | Performance indications |
| Modulus of elasticity/MPa | >=9000MPa, 110E grades |
| MOR/MPa | >=29.5MPa (certified products), 110E grades |
| Horizontal shear strength/MPa | Vertical loading >=5.5MPa, parallel boot >=4.7MPa, 55V-47H grades |
| Burst size of methanal/(mg/L) | ≤ 1.5, E1 grades |
| Dipping and stripping | ≤1/3 |
Embodiment 1：
1) the good poplar quarter-sawed lumber of outward appearance 2 that thickness is 10mm and polyethylene (PE) plate 1 that thickness is 3mm are chosen
Block.Timber quantity, kind, depending on quarter sawing plate thickness is according to product purpose.
2) dry：It is 10% by fast growing wood sawn timber moisture control；
3) gluing：Epoxyn is configured, E51 epoxy resin is dissolved in after cyclohexanone, toluene Mixed Solvent and made
For resin group, wherein cyclohexanone, toluene Mixed Solvent mass ratio are cyclohexanone: toluene=1: 1, epoxy resin and mixed solvent
Mass ratio is epoxy resin:Mixed solvent=10: 9.Polyethylene polyamine is curing agent group, and dibutyl phthalate is plasticising
Agent, according to quality than resin group: curing agent group: plasticizer=10: be well mixed at 1: 0.2.Brush respectively in poplar quarter-sawed lumber and
The adhesive surface of polyethylene, resin added is 260g/m2。
4) assembly：As depicted in figs. 1 and 2, using interlayer structure by the poplar quarter-sawed lumber being glued and plastic plate carry out group
One piece of folder polyethylene board 2, respectively viscous by epoxy glue layer 3 between plate and plate between the poplar quarter-sawed lumber 1 of base, i.e., two
Close.Poplar quarter-sawed lumber cocurrent and parallel is piled up, termination and both sides alignment.
5) precuring：Because epoxide-resin glue can not be penetrated into polyethylene panel, during assembly, to assembly back plate
Base carries out precuring, allows part epoxy to enter in poplar, preload pressure is 3MPa, precompressed 5 minutes.
6) it is cold-pressed：At room temperature, by the good three ply board base of above-mentioned assembly, in the case where pressure is 8MPa, cold pressing solidifies 3h, it is ensured that ring
Oxygen resin adhesive and timber and plastics are fully glued.
7) conserve：After release, the three ply board base is displayed 5 days at room temperature.
8) producing material is encapsulated：Wooden laminated timber is cut according to the size requirements of partition plate.According to product color, texture, defect
Packaging and storage after situation is graded to the examination and test of products.
The performance data that this example is obtained is as follows：
| Experimental project | Performance indications |
| Modulus of elasticity/MPa | 10000MPa, 110E grades |
| MOR/MPa | 32.4MPa (certified products), 110E grades |
| Horizontal shear strength/MPa | Vertical loading=5.8MPa, parallel boot >=4.9MPa, 55V-47H grades |
| Burst size of methanal/(mg/L) | =0.01, E1 grades |
| Dipping and stripping | ≤1/5 |
Embodiment 2
1) the good China fir quarter-sawed lumber of outward appearance 3 that thickness is 50mm and polyvinyl chloride (PVC) plate that thickness is 5mm are chosen
2 pieces.Timber quantity, kind, depending on quarter sawing plate thickness is according to product purpose.
2) gluing：Using 101 polyurethane resins as adhesive, 101 polyurethane resins are hypergolic polyurethane resin, wherein double
Constituent mass ratio is first component: second component=10: 2, by the bonding of adhesive brushing China fir quarter-sawed lumber and polyvinyl chloride panel respectively
Face, resin added is 320g/m2。
3) assembly：As shown in Figure 3 and Figure 4, using interlayer structure by the China fir quarter-sawed lumber being glued and plastic plate carry out group
The China fir quarter-sawed lumber 1 of base, i.e., three presss from both sides one piece of polyvinyl chloride panel 2 respectively between any two, respectively passes through polyurethane between plate and plate
Resin adhesive layer 3 is bonded.China fir quarter-sawed lumber cocurrent and parallel is piled up, termination and both sides alignment.
4) precuring：Because polyurethane adhesive can not be penetrated into polyvinyl chloride plastic flitch, during assembly, to assembly
Slab afterwards carries out precuring, allows some polyurethanes to enter in China fir, preload pressure is 4MPa, precompressed 8 minutes.
5) it is cold-pressed：At room temperature, by five good laminate bases of above-mentioned assembly, in the case where pressure is 12MPa, cold pressing solidifies 10h, it is ensured that
Polyurethane adhesive and timber and plastics are fully glued.
6) curing conservation：After release, the five laminates base carries out cold curing 10 days at room temperature.
7) producing material is encapsulated：Wooden laminated timber is cut according to building structural materials size requirements.According to product color, texture,
Packaging and storage after defect situation is graded to the examination and test of products.
The performance data that this example is obtained is as follows：
| Experimental project | Performance indications |
| Modulus of elasticity/MPa | 10300MPa, 110E grades |
| MOR/MPa | 36.8MPa (Grade A), 110E grades |
| Horizontal shear strength/MPa | Vertical loading=5.9MPa, parallel boot >=4.8MPa, 55V-47H grades |
| Burst size of methanal/(mg/L) | =0.05, E1 grades |
| Dipping and stripping | ≤1/6 |
Embodiment 3
1) the good Eucalyptus quarter-sawed lumber of outward appearance 2 that thickness is 40mm and polypropylene (PP) plate 1 that thickness is 4mm are chosen
Block.Timber quantity, kind, depending on quarter sawing plate thickness is according to product purpose；
2) gluing：Isocyanate adhesive is prepared, the adhesive surface in Eucalyptus quarter-sawed lumber and polypropylene board is brushed respectively, is glued
Measure as 300g/m2；
3) assembly：As shown in Figure 5 and Figure 6, the Eucalyptus quarter-sawed lumber being glued and PP plates are carried out by assembly using interlayer structure,
One piece of polypropylene board 2 is pressed from both sides between i.e. 2 Eucalyptus quarter-sawed lumbers 1, is respectively bonded between plate and plate by isocyanates glue-line 3.Eucalyptus
Wooden quarter-sawed lumber cocurrent and parallel is piled up, termination and both sides alignment；
4) precuring：Because isocyanate glue can not be penetrated into polypropylene board, in assembly, the slab after assembly is carried out
Precuring, allows part isocyanates to enter in Eucalyptus quarter-sawed lumber 1, preload pressure is 2MPa, precompressed 6 minutes；
5) it is cold-pressed：At room temperature, by above-mentioned three ply board base, in the case where pressure is 10MPa, cold pressing solidifies 4h, it is ensured that isocyanates
Adhesive and timber and plastics are fully glued；
6) conserve：After release, the three ply board base is displayed 8 days at room temperature.
7) producing material is encapsulated：Wooden laminated timber is cut according to building structural materials size requirements.According to product color, texture,
Packaging and storage after defect situation is graded to the examination and test of products.
The performance data that this example is obtained is as follows：
| Experimental project | Performance indications |
| Modulus of elasticity/MPa | 9500MPa, 110E grades |
| MOR/MPa | 31.2MPa (certified products), 110E grades |
| Horizontal shear strength/MPa | Vertical loading=5.5MPa, parallel boot >=4.7MPa, 55V-47H grades |
| Burst size of methanal/(mg/L) | =0.05, E1 grades |
| Dipping and stripping | ≤1/5 |
With reference to the related performance indicators of GB/T 20241-2006 laminated veneer lumbers, the mechanical property of embodiment 1~3 is full
The standard of sufficient structure laminated timber, in addition, burst size of methanal is far smaller than E1 grades of standards, shows to can be used for timber floor, timber partition
The interior decorations such as plate.
The specific embodiment of the present invention is described above, but it is not restricted in embodiment listed application.
To those skilled in the art, various modifications can be easily made within the scope of the claims, and the present invention is not limited
In specific details and embodiments above.
Claims (7)
1. a kind of preparation method for being cold-pressed multilayered wood laminated timber, it is characterised in that processing step is as follows：
1) selection：Choose the plastic plate that thickness is 5~50mm wood single-plates or sawn timber and thickness is 1~10mm；
2) dry：It is 10~20% by the wood single-plate or sawn timber moisture control；
3) gluing：In the wood single-plate or sawn timber top sizing；
4) assembly：The wood single-plate or sawn timber are subjected to assembly with plastic plate；
5) precuring：During assembly, precuring is carried out to assembly, preload pressure is 1~5MPa, precompressed 2~30 minutes；
6) it is cold-pressed：At room temperature, 5~12MPa of pressure cold pressings solidify 1~10 hour assembly after precuring；
7) conserve：Display at room temperature 5~10 days.
2. a kind of preparation method for being cold-pressed multilayered wood laminated timber according to claim 1, it is characterised in that：The timber
Veneer or sawn timber raw material are China fir, Eucalyptus or poplar.
3. a kind of preparation method for being cold-pressed multilayered wood laminated timber according to claim 1, it is characterised in that：The plastics
Plate is polyethylene board, polyvinyl chloride panel or polypropylene board.
4. a kind of preparation method for being cold-pressed multilayered wood laminated timber according to claim 1, it is characterised in that：The step
3) top sizing amount is 240~360g/m2。
5. a kind of preparation method for being cold-pressed multilayered wood laminated timber according to claim 1, it is characterised in that：The surface
The adhesive used is glued for epoxyn, polyurethane adhesive or isocyanate adhesive.
6. a kind of preparation method for being cold-pressed multilayered wood laminated timber according to claim 5, it is characterised in that：The epoxy
Resin adhesive be dissolved in by E51 epoxy resin after the mixed solvent of ketone, aromatic hydrocarbon, alcohol add curing agent polyethylene polyamine,
Plasticizer phthalic acid dibutyl ester is formulated.
7. a kind of preparation method for being cold-pressed multilayered wood laminated timber according to claim 5, it is characterised in that：The poly- ammonia
Ester gum stick is 101 polyurethane resins.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710314653.0A CN107243957A (en) | 2017-05-06 | 2017-05-06 | A kind of preparation method for being cold-pressed multilayered wood laminated timber |
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|---|---|---|---|
| CN201710314653.0A CN107243957A (en) | 2017-05-06 | 2017-05-06 | A kind of preparation method for being cold-pressed multilayered wood laminated timber |
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Family
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|---|---|---|---|
| CN201710314653.0A Pending CN107243957A (en) | 2017-05-06 | 2017-05-06 | A kind of preparation method for being cold-pressed multilayered wood laminated timber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108078178A (en) * | 2017-12-15 | 2018-05-29 | 界首市果子林电子商务有限公司 | A kind of wooden tea table of splice type and its manufacturing method |
| CN110938285A (en) * | 2018-09-21 | 2020-03-31 | 广西大学 | Bagasse and glass fiber composite reinforced epoxy resin material and preparation method thereof |
| CN111730707A (en) * | 2020-07-16 | 2020-10-02 | 广西大学 | Method for compressing and densifying fast-growing Chinese fir |
| CN113498371A (en) * | 2020-06-15 | 2021-10-12 | 弗里茨科尔有限两合公司 | Wood composite block, semitransparent wood veneer and production method thereof |
| CN114801217A (en) * | 2022-04-27 | 2022-07-29 | 福建农林大学 | Method for improving bonding performance of PVC/LVL composite decorative section bar by adopting atmospheric plasma process |
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| CN102320067A (en) * | 2011-08-25 | 2012-01-18 | 国家林业局竹子研究开发中心 | Method for producing dyeing laminated veneer lumber of poplar via cold pressing method |
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| CN114801217A (en) * | 2022-04-27 | 2022-07-29 | 福建农林大学 | Method for improving bonding performance of PVC/LVL composite decorative section bar by adopting atmospheric plasma process |
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Application publication date: 20171013 |