CN105538744A - Preparation method of FRP (Fiber Reinforced Plastic) reinforced wood composite material - Google Patents
Preparation method of FRP (Fiber Reinforced Plastic) reinforced wood composite material Download PDFInfo
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- CN105538744A CN105538744A CN201510928926.1A CN201510928926A CN105538744A CN 105538744 A CN105538744 A CN 105538744A CN 201510928926 A CN201510928926 A CN 201510928926A CN 105538744 A CN105538744 A CN 105538744A
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- frp
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- wood composite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
Abstract
The invention aims at providing a preparation method of a FRP (fiber reinforced plastic) reinforced wood composite material to solve the technical problem. According to the preparation method, the FRP reinforced wood composite material is prepared by adopting a vacuum assisted resin infusion (VARI) method, preparation of FRP and preparation of the FRP reinforced wood composite material can be combined into one step, and single-process forming can be achieved. A technical scheme for solving the technical problem is to provide the preparation method of the FRP reinforced wood composite material, comprising the stages of material preparation and processing, sealing, resin injection and post processing. According to the invention, the FRP reinforced wood composite material can be prepared by adopting the vacuum assisted resin infusion (VARI) method, preparation of FRP and preparation of the FRP reinforced wood composite material can be combined into one step, and single-process forming can be achieved. The method is simple in operation and low in cost, and can realize single-process forming of the FRP reinforced wood composite material used for industrial production.
Description
Technical field
The present invention relates to structural lumber and manufacture field, specifically a kind of FRP (fiber-reinforced resin) strengthens Wood composite material preparation method.
Background technology
Timber is as unique reproducible natural material in the large construction material in the world today four, it not only has the environmental harmony performances such as the higher ratio of strength to weight, outstanding heat-insulation and heat-preservation, sound-adsorbing sound-insulating hung, shock resistance and natural beauty, texture is pleasant, and have that power consumption of polymer processing is few, environmental protection, can natural degradation and the advantage such as to recycle.Therefore along with people more and more pay attention to energy-conserving and environment-protective, sustainable development, people to the demand of timber also in continuous growth.Current various countries, to the protection of environment and the forest reserves, make the high-quality timber of engineering deficienter, impel various countries using the application of artificial forest fast growing wood, low-grade wood as research emphasis.
The polymer matrix composites of FRP (FiberReinforcedPolymer) to be a kind of with high-performance fiber be reinforcing material, have mechanical property more better than timber.It is a kind of Novel engineering wooden materials that FRP strengthens Wood composite material, and the environmental performance combining timber is good, cost is low and intensity that is FRP is high, rigidity is large, good flame resistance, the advantage such as corrosion-resistant.FRP strengthens the use value that Wood composite material improves timber, realize the Optimum utilization of low-grade wood, greatly expand the application of wood materials, not only can be widely used in the infrastructure fields such as residential houses, commercial building, highway, bridge, also can be used for the high-tech sector such as naval vessel, communications and transportation.
The main method that current preparation FRP strengthens Wood composite material is bonding method, Chinese patent (ZL200710118888.9) discloses a kind of basalt continuous filament reinforced wood material and manufacture method thereof, take basalt continuous fiber as reinforcing material, with the chemical substance containing silanes chemical composition for coupling agent, with various unsaturated polyester resin, phenolic resins, epoxy resin, resorcinol resin, amino resins, vinylite or various meliorative unsaturated polyester resin, phenolic resins, epoxy resin, resorcinol, amino resins, vinylites etc. are matrix, produce basalt continuous fibre enhancement resin composite material.Chinese patent (ZL200910073226.3) discloses a kind of unsaturated polyester resin adhering glass fiber reinforcement wooden frame and implementation method thereof, this glass fiber reinforcement wooden frame, primarily of gummed wooden frame and glass fabric composition, utilizes unsaturated polyester resin sticking glass fabric to strengthen it by local bottom wooden frame.A series of process implementation gummed preparation of wooden frame and the local enhancements of glass fabric such as its preparation method is by processing of getting the raw materials ready, finger, cold pressing, pretreatment, post-processed.But said method is secondary forming process, the preparation strengthening Wood composite material by the preparation of FRP and FRP is divided into two steps to carry out, complicated operation, and the production cycle is long; And do not solve the problem how even infiltration of resin and resin are full of reinforcing material.
Summary of the invention
For the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is, a kind of FRP is provided to strengthen Wood composite material preparation method, the method is prepared FRP by the method for vacuum assisted resin infusion VARI (VacuumAssistedResinInfusion) and is strengthened Wood composite material, a step is merged in the preparation that the preparation of FRP and FRP can be strengthened Wood composite material, one-shot forming, the technical scheme that the present invention solve the technical problem is, a kind of FRP is provided to strengthen Wood composite material preparation method, be divided into the process segment of getting the raw materials ready, the sealing stage, the resin injection stage, post-processed, its concrete operation step is:
The first step, to get the raw materials ready the process segment:
Choose applicable plank, plank is removed surface impurity, make wood surface smooth clean, then timber is carried out till dry moisture content is dried to 8%-12%; Spliced by plank, the gap that wood board splicing produces will become resin channels; Then utilize on mould and strengthen fabric timber is mated formation assembly, make prefabricated component, the assembly of timber and enhancing fabric as shown in Figure 2 and Figure 3, the laying number of plies of different enhancing fabrics can be designed according to user demand and strengthen fabric types, or punch on plank, aperture, as resin channels, makes resin pass plank;
Second step, sealing stage:
Sealing system is utilized to seal, described sealing system comprises mould, separating diaphragm, prefabricated component, release cloth, flow-guiding screen, adhesive pouring nozzle, vacuum bag film, vacuum nozzle, sealing system surrounding sealant tape seals, adhesive pouring nozzle and vacuum nozzle has been provided with on described vacuum bag is thin, sealing system two ends are connected with vacuum tube with injected rubber hose with vacuum nozzle respectively by adhesive pouring nozzle, the vacuum tube other end connects vavuum pump, carry out sealing propertytest, injected rubber hose is closed, open vacuum pump evacuation, whether test sealing system leaks gas, the next stage is entered if air tight, the resin injection stage,
3rd step, resin injection stage:
After sealing, first by low viscosity epoxy resin and curing agent, ratio is as requested deployed, stir, leave standstill 3-8 minute de-bubbled, then open vavuum pump, open injected rubber hose, start perfusion resin, when flooding complete, close injected rubber hose, stop perfusion resin, close vavuum pump, cold curing 4-5h;
4th step, post-processed:
After resin injection, carry out post-processed, first tear sealant tape, take off vacuum bag film, then the product prepared is taken off, finally release cloth is torn together with flow-guiding screen, finally obtain FRP and strengthen Wood composite material.
Described sealing system comprises mould, separating diaphragm, prefabricated component, release cloth, flow-guiding screen, adhesive pouring nozzle, vacuum bag film, vacuum nozzle, it is separating diaphragm on the upside of described mould, it is prefabricated component on the upside of described separating diaphragm, release cloth is equipped with on the upside of described prefabricated component, flow-guiding screen, vacuum bag film is enclosed with on the upside of described mould, described separating diaphragm, prefabricated component, release cloth, flow-guiding screen is all positioned at inside vacuum bag film, described vacuum bag film offers adhesive pouring nozzle and vacuum nozzle, described adhesive pouring nozzle is connected with vacuum tube with injected rubber hose respectively with vacuum nozzle, the vacuum tube other end connects vavuum pump.
When adopting polylith wood board splicing, the gap that wood board splicing produces will become resin channels; When adopting monoblock plank, can punch on plank, described hole diameter is 2mm, and spacing is 200mm.
Beneficial effect of the present invention is: the present invention utilizes fiber to strengthen timber, both improve the performances such as the mechanical property of timber, ductility, creep resistance, durability, rotproofness, again reduce the performance difference of timber own and the variability of the Wood composite material caused.Production technology of the present invention is simple, easy to operate, with short production cycle, is applicable to large scale industry and produces.The fabric that fiber is made and timber all have good deformability, deformation that can not be good when overcoming FRP plate and wood adhesion, the combination that resin is good with timber under vacuum simultaneously, combine firm, will strengthen fabric and wood adhesion.The present invention prepares FRP by the method for vacuum assisted resin infusion VARI (VacuumAssistedResinInfusion) and strengthens Wood composite material, a step is merged in the preparation that the preparation of FRP and FRP can be strengthened Wood composite material, one-shot forming, and stud is integrated into large-sized sheet material.The method be a kind of operate simple and easy, cheap, Wood composite material one-time formed method can be strengthened for the FRP of suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is that a kind of FRP of the present invention strengthens Wood composite material and preparation method thereof VARI technology arrangement schematic diagram;
Fig. 2 is that a kind of FRP of the present invention strengthens Wood composite material and preparation method thereof timber splicing and prefabricated component is made in the assembly of enhancing fabric;
Fig. 3 is that a kind of FRP of the present invention strengthens the punching of Wood composite material and preparation method thereof timber and prefabricated component is made in the assembly of enhancing fabric;
Fig. 4 is the generalized section that a kind of FRP strengthens the punching of Wood composite material and preparation method thereof timber;
As figure, 1-mould, 2-separating diaphragm, 3-prefabricated component, 4-release cloth, 5-flow-guiding screen, 6-adhesive pouring nozzle, 7-vacuum bag film, 8-vacuum nozzle, 9-strengthens fabric, 10-plank, 11-gap, the plank of 12-punching, 13-aperture.
Detailed description of the invention
Provide specific embodiments of the invention below.Specific embodiment, only for further describing the present invention, does not limit the protection domain of the application's claim.
The present invention is set forth further below in conjunction with embodiment and accompanying drawing thereof.
See Fig. 1-4, log saw solution is become the sheet material of specified size, then till moisture content being dried to 8%-12%, again polylith plank 10 is spliced and combine prefabricated component 3 with enhancing fabric 9, utilize the gap 11 of splicing generation as resin channels, make resin flow to lower surface from plank 10 upper surface; Also can adopt the plank 12 of punching, the plank 12 of punching and enhancing fabric 9 are combined prefabricated component 3, aperture 13, as resin channels, makes resin flow to lower surface from plank 12 upper surface of punching.Again by ready-made prefabricated component 3 and mould 1, separating diaphragm 2, release cloth 4, flow-guiding screen 5, vacuum bag film 7, with reference to shown in Fig. 1, form a sealing system, two ends are by adhesive pouring nozzle 6 and vacuum nozzle 8 connection glue injection pipe and vacuum tube respectively.Whether test sealing system leaks gas, just can perfusion resin if air tight.By epoxy resin GCC135 and curing agent W93, allocate according to the ratio of mass ratio 100:30 or volume ratio 3:1, stir and reduce bubble in standing 3 minutes, then open vavuum pump, open injected rubber hose, start perfusion resin.Observe resin to the dipping situation of prefabricated component, when flooding complete, close injected rubber hose, stop perfusion resin, close vavuum pump, normal temperature cure 4-5h.Tear sealant tape after completion of cure, take off vacuum bag film 7, then the product prepared is taken off from mould 1, finally release cloth is torn together with flow-guiding screen, obtain made FRP/ Wood composite material plate.
Embodiment 1
Select Russia to produce pinus sylvestris var. mongolica, its tensile strength of E-glass fibre is 2700MPa, epoxy resin GCC135, curing agent W93, and its 25 DEG C of viscosity are respectively 700 ~ 100mPas, 10 ~ 100mPas, as the primary raw material making FRP/ Wood composite material plate.Make FRP/ Wood composite material plate according to the method described in the present invention, main technologic parameters is: the pinus sylvestris var. mongolica plate of two pieces of 500 × 200 × 24mm is stitched together, splicing gap is as resin channels, the made fabric of E-glass fibre is respectively laid two-layer in pinus sylvestris var. mongolica plate upper and lower surface, it is 520g that epoxy resin GCC135 and curing agent W93 allocates gross weight according to volume ratio 3:1, solidifies 4-5h under room temperature condition.
E-glass fiber reinforcement pinus sylvestris var. mongolica composite panel obtained by the present embodiment improves 30% compared to former pinus sylvestris var. mongolica plank hot strength, bending strength improves 42%, impact flexibility almost improves 2 times, and E-glass fiber reinforcement pinus sylvestris var. mongolica composite, interface cohesion is firm, bonding property is good, resistance to stripping.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (3)
1. FRP strengthens a Wood composite material preparation method, and it is characterized in that being divided into get the raw materials ready process segment, sealing stage, resin injection stage, post-processed, its concrete operation step is:
The first step, to get the raw materials ready the process segment:
Choose applicable plank, plank is removed surface impurity, make wood surface smooth clean, then timber is carried out till dry moisture content is dried to 8%-12%; Spliced by plank, the gap that wood board splicing produces will become resin channels; Then utilize on mould and strengthen fabric timber is mated formation assembly, make prefabricated component, the assembly of timber and enhancing fabric as shown in Figure 2 and Figure 3, the laying number of plies of different enhancing fabrics can be designed according to user demand and strengthen fabric types, if monoblock plank, can punch on plank again, aperture, as resin channels, makes resin pass plank;
Second step, sealing stage:
Sealing system is utilized to seal, described sealing system comprises mould, separating diaphragm, prefabricated component, release cloth, flow-guiding screen, adhesive pouring nozzle, vacuum bag film, vacuum nozzle, sealing system surrounding sealant tape seals, adhesive pouring nozzle and vacuum nozzle has been provided with on described vacuum bag is thin, sealing system two ends are connected with vacuum tube with injected rubber hose with vacuum nozzle respectively by adhesive pouring nozzle, the vacuum tube other end connects vavuum pump, carry out sealing propertytest, injected rubber hose is closed, open vacuum pump evacuation, whether test sealing system leaks gas, the next stage is entered if air tight, the resin injection stage,
3rd step, resin injection stage:
After sealing, first by low viscosity epoxy resin and curing agent, ratio is as requested deployed, stirs, leave standstill 3-8 minute de-bubbled, then open vavuum pump, open injected rubber hose, start perfusion resin, when flooding complete, close injected rubber hose, stop perfusion resin, close vavuum pump; Cold curing 4-5h;
4th step, post-processed:
After resin injection, carry out post-processed, first tear sealant tape, take off vacuum bag film, then the product prepared is taken off, finally release cloth is torn together with flow-guiding screen, finally obtain FRP and strengthen Wood composite material.
2. strengthen Wood composite material preparation method according to a kind of FRP according to claim 1, it is characterized in that described sealing system comprises mould, separating diaphragm, prefabricated component, release cloth, flow-guiding screen, adhesive pouring nozzle, vacuum bag film, vacuum nozzle, it is separating diaphragm on the upside of described mould, it is prefabricated component on the upside of described separating diaphragm, release cloth is equipped with on the upside of described prefabricated component, flow-guiding screen, vacuum bag film is enclosed with on the upside of described mould, described separating diaphragm, prefabricated component, release cloth, flow-guiding screen is all positioned at inside vacuum bag film, described vacuum bag film offers adhesive pouring nozzle and vacuum nozzle, described adhesive pouring nozzle is connected with vacuum tube with injected rubber hose respectively with vacuum nozzle, the vacuum tube other end connects vavuum pump.
3. strengthen Wood composite material preparation method according to a kind of FRP according to claim 1, when adopting polylith wood board splicing, it is characterized in that the gap that wood board splicing produces will become resin channels; When adopting monoblock plank, can punch on plank, described hole diameter is 2mm, and spacing is 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510928926.1A CN105538744A (en) | 2015-12-11 | 2015-12-11 | Preparation method of FRP (Fiber Reinforced Plastic) reinforced wood composite material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510928926.1A CN105538744A (en) | 2015-12-11 | 2015-12-11 | Preparation method of FRP (Fiber Reinforced Plastic) reinforced wood composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106945309A (en) * | 2017-05-04 | 2017-07-14 | 华东交通大学 | Timber structure reinforcement process based on vacuum suction method |
| CN107053702A (en) * | 2017-05-04 | 2017-08-18 | 华东交通大学 | Steel member reinforcement process based on vacuum suction method |
| CN114633322A (en) * | 2022-03-22 | 2022-06-17 | 无锡聚义盛新材料科技有限公司 | Novel solid wood veneer fireproof plate and processing technology thereof |
-
2015
- 2015-12-11 CN CN201510928926.1A patent/CN105538744A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 赵晨辉等: "真空辅助树脂注射成型(VARI)研究进展", 《玻璃钢/复合材料》 * |
| 靳婷婷: "BF增强竹木复合材料一次成型工艺技术研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106945309A (en) * | 2017-05-04 | 2017-07-14 | 华东交通大学 | Timber structure reinforcement process based on vacuum suction method |
| CN107053702A (en) * | 2017-05-04 | 2017-08-18 | 华东交通大学 | Steel member reinforcement process based on vacuum suction method |
| CN114633322A (en) * | 2022-03-22 | 2022-06-17 | 无锡聚义盛新材料科技有限公司 | Novel solid wood veneer fireproof plate and processing technology thereof |
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Application publication date: 20160504 |