CN104626293A - Preparing method for bamboo fiber sandwich composite board - Google Patents
Preparing method for bamboo fiber sandwich composite board Download PDFInfo
- Publication number
- CN104626293A CN104626293A CN201410739356.7A CN201410739356A CN104626293A CN 104626293 A CN104626293 A CN 104626293A CN 201410739356 A CN201410739356 A CN 201410739356A CN 104626293 A CN104626293 A CN 104626293A
- Authority
- CN
- China
- Prior art keywords
- composite board
- preparation
- sandwich composite
- bamboo fibre
- bamboo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/60—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention belongs to the field of board preparing, and relates to a preparing method for a bamboo fiber sandwich composite board. The preparing method is characterized in that phenol, water, paraformaldehyde and a sodium hydroxide solution are added in a flask, the pH value is adjusted, a reaction product is discharged in a cold mode, and fermentable phenolic resin is prepared; raw bamboo fiber materials modified through a silane coupling agent are added, a surface active agent, a foaming agent and a curing agent are added in sequence, mixing is even, the resin mixture is poured in a die, and foaming and curing are carried out; roller painting and gluing are manually carried out; the upper surface and the lower surface are each provided with a layer of thin bamboo panel, closing is carried out for 10-15 min after gluing, normal-temperature cold pressing is carried out, and the composite board is prepared. By means of the improvement on the preparing technology, the compression strength of the prepared composite board is enhanced, the longitudinal bending strength and the transverse bending strength are improved, and the preparing technology is easy to operate and suitable for being industrially applied and popularized.
Description
Technical field
the invention belongs to sheet material preparation field, particularly relate to a kind of preparation method of bamboo fibre sandwich composite board.
Background technology
In the building decoration in modern times, the use of composite gets more and more.Phenolic foam sandwich composite plate is a kind of novel flame retardant type wood-based plate, has the effect such as thermal insulation, sound insulation, is the desirable light building material being applied to energy-saving heat preserving inside and outside body of wall, exterior wall.Particularly China's fire frequently occurs nearly ten years, and the fire of more than 90% is owing to accidentally causing indoor combustible combustion to cause with fire, and the property of the fire serious threat people and life security, therefore the exploitation of fire-retardant building materials is very important.Meanwhile, along with the further raising of energy-saving heat preserving and fire resistance index request, the demand of fire-retardant building materials will increase further, and flame retardant type phenolic foam sandwich composite plate that is light-duty, energy-saving and environmental protection has immeasurable market potential.On current market, phenolic foam sandwich composite plate its upper and lower two pieces panels playing carrying effect are mainly the sheet metals such as the larger color steel of intensity, corrosion resistant plate, aluminium sheet, and kind is relatively single, limit its application in building.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of preparation method of bamboo fibre sandwich composite board.
A preparation method for bamboo fibre sandwich composite board, is characterized in that comprising the steps:
(1) 500mL flask in add phenol and water, paraformaldehyde and sodium hydroxide solution then divide three times and add, and regulate pH value, product are cooled to 40 DEG C with bottom discharge, obtained expandable phenolic resin;
(2) in expandable phenolic resin, add silane coupler modified former bamboo fiber material, then add surfactant, blowing agent, curing agent successively, and mix, resin compound is poured in mould, solidification of bubbling;
(3) artificial roller coat gluing; The each 1 layer of thin bamboo panel of upper and lower surface, strengthens grid material between upper and lower thin bamboo panel and sandwich froth bed, closed 10 ~ 15 min after gluing, and normal temperature is colded pressing, obtained composite plate.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, is characterized in that the flask described in step (1) is four-hole boiling flask, and flask is provided with agitator, reflux condensing tube, thermometer.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, it is characterized in that described in step (1) be for three times: the first stage, be warming up to 90 DEG C start timing, reaction time 60 ~ 90 min; Second stage, temperature maintains 90 DEG C, reaction time 50 ~ 70 min; Phase III, temperature maintains 85 DEG C, reaction time 30 ~ 50 min.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, the temperature of the solidification that it is characterized in that bubbling described in step (2) is 70 DEG C.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, is characterized in that described in step (3), spread is 180 ~ 200 g/m
2.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, it is characterized in that pressure 1 MPa colded pressing described in step (3), cold pressing time 4 ~ 8 h.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, is characterized in that composite plate described in step (3) 3 layers or 5 layers altogether, gross thickness 25 ± 0.5mm after assembly.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, by the improvement of preparation technology, the compressive strength of prepared composite plate strengthens, and buckling strength, transverse bending strength are all improved, and preparation technology is simple to operate, be applicable to industrial application.
Detailed description of the invention
A preparation method for bamboo fibre sandwich composite board, is characterized in that comprising the steps:
(1) 500mL flask in add phenol and water, paraformaldehyde and sodium hydroxide solution then divide three times and add, and regulate pH value, product are cooled to 40 DEG C with bottom discharge, obtained expandable phenolic resin;
(2) in expandable phenolic resin, add silane coupler modified former bamboo fiber material, then add surfactant, blowing agent, curing agent successively, and mix, resin compound is poured in mould, solidification of bubbling;
(3) artificial roller coat gluing; The each 1 layer of thin bamboo panel of upper and lower surface, strengthens grid material between upper and lower thin bamboo panel and sandwich froth bed, closed 10 ~ 15 min after gluing, and normal temperature is colded pressing, obtained composite plate.
The preparation method of a kind of bamboo fibre sandwich composite board of the present invention, the flask described in step (1) is four-hole boiling flask, and flask is provided with agitator, reflux condensing tube, thermometer.Be for three times: the first stage be warming up to 90 DEG C and start timing, reaction time 60 ~ 90 min described in step (1); Second stage, temperature maintains 90 DEG C, reaction time 50 ~ 70 min; Phase III, temperature maintains 85 DEG C, reaction time 30 ~ 50 min.The temperature of solidifying of bubbling described in step (2) is 70 DEG C.Described in step (3), spread is 180 ~ 200 g/m
2.Pressure 1 MPa colded pressing described in step (3), cold pressing time 4 ~ 8 h.Composite plate described in step (3) 3 layers or 5 layers altogether, gross thickness 25 ± 0.5mm after assembly.When interface bonding strength when between base material (bamboo fiber reinforcement phenolic foam sandwich) top layer and finishing material (thin bamboo sheet) is greater than its any homogenous material self-strength, base material or the finishing material of sample are damaged; And the interface bonding strength when between base material top layer and finishing material is when being less than its any homogenous material self-strength, sample glue-line is peeled off.The maximum load that composite board shows in the test of surface bonding intensity is main relevant to bamboo fiber reinforcement phenolic foam sandwich self-strength, and maximum load is less than the load required for the glue-line stripping of interface.Consider from the performance perspective of composite board, the best interfacial bonder of thin bamboo veneer and bamboo fiber reinforcement phenolic foam sandwich is epoxy AB glue.Composite board is in forced compression process, what be damaged at first is all its sandwich froth bed, therefore composite board compressive strength is relevant with the compressive strength of size mainly with its sandwich froth bed itself of modulus of elasticity in comperssion, grid material mainly improves composite board uniform force, strengthen DeGrain, the veneer of thin bamboo veneer is due to the fiber alignment feature of self, and its vertical and horizontal bending strength and the modulus of elasticity in static bending exist obvious difference.And the bending strength of phenolic foam sandwich and the modulus of elasticity in static bending are relatively little, therefore the bending strength size of composite board depends primarily on the mechanical property of thin bamboo veneer and grid reinforcing material.Dimensional stability on the length of composite board and width depends primarily on the performance of phenol formaldehyde foam core, and dimensional stability on thickness direction with foam core, thin bamboo veneer, strengthen the element such as grid material and glue-line and all there is correlation.Natural ramie fiber grid cloth and stainless steel cloth are to the enhancing best results of the mechanical property such as compression performance, bending property, impact strength of thin bamboo face bamboo fiber reinforcement phenolic foam sandwich composite plate material.
Claims (7)
1. a preparation method for bamboo fibre sandwich composite board, is characterized in that comprising the steps:
(1) 500mL flask in add phenol and water, paraformaldehyde and sodium hydroxide solution then divide three times and add, and regulate pH value, product are cooled to 40 DEG C with bottom discharge, obtained expandable phenolic resin;
(2) in expandable phenolic resin, add silane coupler modified former bamboo fiber material, then add surfactant, blowing agent, curing agent successively, and mix, resin compound is poured in mould, solidification of bubbling;
(3) artificial roller coat gluing; The each 1 layer of thin bamboo panel of upper and lower surface, strengthens grid material between upper and lower thin bamboo panel and sandwich froth bed, closed 10 ~ 15 min after gluing, and normal temperature is colded pressing, obtained composite plate.
2. the preparation method of a kind of bamboo fibre sandwich composite board as claimed in claim 1, is characterized in that the flask described in step (1) is four-hole boiling flask, and flask is provided with agitator, reflux condensing tube, thermometer.
3. the preparation method of a kind of bamboo fibre sandwich composite board as claimed in claim 1, it is characterized in that described in step (1) be for three times: the first stage, be warming up to 90 DEG C start timing, reaction time 60 ~ 90 min; Second stage, temperature maintains 90 DEG C, reaction time 50 ~ 70 min; Phase III, temperature maintains 85 DEG C, reaction time 30 ~ 50 min.
4. the preparation method of a kind of bamboo fibre sandwich composite board as claimed in claim 1, the temperature of the solidification that it is characterized in that bubbling described in step (2) is 70 DEG C.
5. the preparation method of a kind of bamboo fibre sandwich composite board as claimed in claim 1, is characterized in that described in step (3), spread is 180 ~ 200 g/m
2.
6. the preparation method of a kind of bamboo fibre sandwich composite board as claimed in claim 1, it is characterized in that pressure 1 MPa colded pressing described in step (3), cold pressing time 4 ~ 8 h.
7. the preparation method of a kind of bamboo fibre sandwich composite board as claimed in claim 1, is characterized in that composite plate described in step (3) 3 layers or 5 layers altogether, gross thickness 25 ± 0.5mm after assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739356.7A CN104626293A (en) | 2014-12-08 | 2014-12-08 | Preparing method for bamboo fiber sandwich composite board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739356.7A CN104626293A (en) | 2014-12-08 | 2014-12-08 | Preparing method for bamboo fiber sandwich composite board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104626293A true CN104626293A (en) | 2015-05-20 |
Family
ID=53205752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410739356.7A Pending CN104626293A (en) | 2014-12-08 | 2014-12-08 | Preparing method for bamboo fiber sandwich composite board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104626293A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106945167A (en) * | 2017-01-19 | 2017-07-14 | 刘文华 | A kind of preparation method of sandwich sheet |
| CN111674117A (en) * | 2020-06-07 | 2020-09-18 | 姚本海 | Bamboo veneer light composite board and manufacturing method thereof |
-
2014
- 2014-12-08 CN CN201410739356.7A patent/CN104626293A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106945167A (en) * | 2017-01-19 | 2017-07-14 | 刘文华 | A kind of preparation method of sandwich sheet |
| CN111674117A (en) * | 2020-06-07 | 2020-09-18 | 姚本海 | Bamboo veneer light composite board and manufacturing method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
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| WD01 | Invention patent application deemed withdrawn after publication |