CN112497413A - Foaming material, ultralow-density flame-retardant oriented strand board and preparation method - Google Patents
Foaming material, ultralow-density flame-retardant oriented strand board and preparation method Download PDFInfo
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- CN112497413A CN112497413A CN202011366493.2A CN202011366493A CN112497413A CN 112497413 A CN112497413 A CN 112497413A CN 202011366493 A CN202011366493 A CN 202011366493A CN 112497413 A CN112497413 A CN 112497413A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
- A47B96/20—Furniture panels or like furniture elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/005—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/20—Ternary blends of expanding agents
- C08J2203/202—Ternary blends of expanding agents of physical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention provides a foaming material, an ultra-low density flame-retardant oriented strand board and a preparation method thereof, wherein the foaming material comprises the following raw materials in parts by weight: 50-70 parts of polyether polyol, 15-20 parts of isocyanate, 1-4 parts of antioxidant, 1-4 parts of foaming agent, 4-8 parts of chain extender, 0.5-2 parts of pigment, 2-4 parts of plasticizer and 2-4 parts of phosphorus flame retardant. The preparation method disclosed by the invention has the advantages that the foaming material is added during preparation, the combined polyether polyol and MDI are used for carrying out low-degree foaming under the action of the catalyst, the polyurethane foam is used for filling gaps among the wood shavings, the quality of the shaving board is greatly improved, the internal bonding strength, the elastic modulus and the static bending strength are obviously improved, and the fireproof function can be realized.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a foaming material, an ultralow-density flame-retardant oriented strand board and a preparation method thereof.
Background
In recent years, the particle board industry has been rapidly developed, and the particle board has partially replaced wood and plywood in the aspects of building, furniture, ship and vehicle interior decoration, and the application range is continuously expanded. China now becomes a big world for particle board production, but China is not a strong country for particle board production. At present, the density of the oriented strand board products in domestic market is 0.65g/cm3On the other hand, low-density oriented strand boards also have a wide application market, and lightweight materials such as low-density oriented strand boards have been the research hotspots in recent years due to the positive effects of energy conservation and emission reduction. However, low density oriented strand board has very poor mechanical properties at present; only low density can be achieved, and ultra-low density cannot be achieved; the light material and wood shavings are difficult to integrate together and have poor bonding strength.
In the prior art, the invention patent with Chinese patent application number CN110091409A discloses a low-density veneerable oriented strand board, which comprises a core layer, a subsurface layer and a surface layer, wherein the core layer is made of small-diameter poplar wood and branch wood, the large wood shavings (the length of the wood shavings is 50-80 mm) are produced by a long wood chipper and a two-section chipper, the subsurface layer is made of large wood shavings (the length of the wood shavings is 80-120 mm) produced by the equipment, the surface layer is made of plywood, a fine wood board, leftover materials, saw dust and wood shavings produced in the production process of the strand board, the raw materials are dried, screened, glued, paved, pre-pressed, trimmed, steamed and continuously hot-pressed to obtain the low-density veneerable oriented strand board, and the density of the veneerable oriented strand board is less than or equal to 520kg/m3The static bending strength in the parallel direction can be achieved22-38 MPa, the elastic modulus can reach 3200-4500 MPa, the application of the product is not limited to the application range of common OSB, and the product can be widely applied to direct veneering of furniture, interior decoration, packaging and floor base materials. However, in the patent, wood species with low density are selected as wood shavings raw materials, the consumption of the wood shavings is reduced by utilizing an advanced paving and pressure system, the cost is increased, the preparation method is relatively complex, along with the increasing maturity of the wood processing technology of human beings, the performances of different tree species are excavated completely, and the tree species which have the density far lower than that of pine and meet the requirement of mass exploitation are difficult to find according to the current practical situation.
The invention with the patent application number of CN110605772A discloses a low-density reed shaving board and a preparation method thereof, wherein the adhesive and the tackifier are added into surface layer shavings and core layer shavings, and the number of glue nails (the number of tiny glue drops) on the surfaces of the reed shavings is increased by controlling the addition amount of the adhesive, so that the using amount of the reed shavings can be properly reduced on the basis of ensuring the physical performance index of the reed shaving board, the density of the reed shaving board is further reduced, and the machining service performance of the reed shaving board is improved; the technical means adopted by the invention is to make up for the loss caused by density reduction by increasing the glue amount, but the limitation is large, the density can be reduced to a certain degree, but the true ultra-low density cannot be realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an ultralow-density flame-retardant oriented shaving board and a preparation method thereof.
The invention provides the following technical scheme:
a foaming material for a particle board comprises the following raw materials in parts by weight: 50-70 parts of polyether polyol, 15-20 parts of isocyanate, 1-4 parts of antioxidant, 1-4 parts of foaming agent, 4-8 parts of chain extender, 0.5-2 parts of pigment, 2-4 parts of plasticizer and 2-4 parts of phosphorus flame retardant.
Preferably, the raw materials comprise the following components in parts by weight: 55-65 parts of polyether polyol, 16-19 parts of isocyanate, 1.5-3.5 parts of antioxidant, 1.5-3.5 parts of foaming agent, 5-7 parts of chain extender, 0.6-1.5 parts of pigment, 2.5-3.5 parts of plasticizer and 2.5-3.5 parts of phosphorus flame retardant.
In any of the above schemes, the raw materials comprising the following components by weight are preferred: 50 parts of polyether polyol, 15 parts of isocyanate, 1 part of antioxidant, 1 part of foaming agent, 4 parts of chain extender, 0.5 part of pigment, 2 parts of plasticizer and 2 parts of phosphorus flame retardant.
In any of the above schemes, the raw materials comprising the following components by weight are preferred: 55 parts of polyether polyol, 16 parts of isocyanate, 1.5 parts of antioxidant, 1.5 parts of foaming agent, 5 parts of chain extender, 0.6 part of pigment, 2.5 parts of plasticizer and 2.5 parts of phosphorus flame retardant.
In any of the above schemes, the raw materials comprising the following components by weight are preferred: 60 parts of polyether polyol, 18 parts of isocyanate, 2 parts of antioxidant, 2 parts of foaming agent, 6 parts of chain extender, 1 part of pigment, 3 parts of plasticizer and 3 parts of phosphorus flame retardant.
In any of the above schemes, the raw materials comprising the following components by weight are preferred: 65 parts of polyether polyol, 19 parts of isocyanate, 3.5 parts of antioxidant, 3.5 parts of foaming agent, 7 parts of chain extender, 1.5 parts of pigment, 3.5 parts of plasticizer and 3.5 parts of phosphorus flame retardant.
In any of the above schemes, the raw materials comprising the following components by weight are preferred: 70 parts of polyether polyol, 20 parts of isocyanate, 4 parts of antioxidant, 4 parts of foaming agent, 8 parts of chain extender, 2 parts of pigment, 4 parts of plasticizer and 4 parts of phosphorus flame retardant.
In any of the above embodiments, preferably, the polyether polyol includes at least one of polyether diol, polyether triol, and polyether tetraol.
In any of the above embodiments, preferably, the polyether polyol is a mixture of polyether diol, polyether triol and polyether tetraol.
In any of the above schemes, preferably, the ratio of the polyether diol, the polyether triol and the polyether tetraol is 0.5-2: 0.5-2: 1-3.
In any of the above schemes, preferably, the usage ratio of the polyether diol, the polyether triol and the polyether tetraol is 0.5: 0.5: 1.
in any of the above schemes, preferably, the usage ratio of the polyether diol, the polyether triol and the polyether tetraol is 1: 1: 1.5.
in any of the above schemes, preferably, the usage ratio of the polyether diol, the polyether triol and the polyether tetraol is 2: 2: 3.
in any of the above schemes, preferably, the foaming agent comprises the following raw materials by mass percent: 15-30% of cyclopentane, 20-30% of isobutane, 15-30% of n-pentane, 15-25% of nano silicon dioxide and 5-15% of aluminum dihydrogen phosphate.
In any of the above schemes, preferably, the foaming agent comprises the following raw materials by mass percent: 18-28% of cyclopentane, 18-28% of isobutane, 18-28% of n-pentane, 18-22% of nano silicon dioxide and 6-12% of aluminum dihydrogen phosphate.
In any of the above schemes, preferably, the foaming agent comprises the following raw materials by mass percent: 15% of cyclopentane, 30% of isobutane, 30% of n-pentane, 15% of nano silicon dioxide and 10% of aluminum dihydrogen phosphate.
In any of the above schemes, preferably, the foaming agent comprises the following raw materials by mass percent: 25% of cyclopentane, 25% of isobutane, 20% of n-pentane, 20% of nano silicon dioxide and 10% of aluminum dihydrogen phosphate.
In any of the above schemes, preferably, the foaming agent comprises the following raw materials by mass percent: 30% of cyclopentane, 20% of isobutane, 15% of n-pentane, 25% of nano silicon dioxide and 10% of aluminum dihydrogen phosphate.
In any of the above embodiments, preferably, the antioxidant is tert-butylhydroquinone (TBHQ).
In any of the above embodiments, preferably, the chain extender is diethylene glycol (DEG).
In any of the above embodiments, preferably, the pigment is iron oxide red.
In any of the above embodiments, preferably, the plasticizer is a phthalate.
In any of the above embodiments, the phosphorus-based flame retardant is preferably tributyl phosphate TBP.
The invention also provides an ultra-low density flame-retardant oriented strand board prepared by adopting the foaming material, which is formed by adding the foaming material, the adhesive and the emulsified paraffin into pine wood shavings, paving the pine wood shavings after stirring, and performing hot pressing.
The invention also provides a preparation process of the ultralow-density flame-retardant oriented strand board, which comprises the following steps of:
(1) after the pine wood is shaved, adding a foaming material, an MDI adhesive and emulsified paraffin and stirring;
(2) directionally paving, wherein the wood shaving proportion is that the upper surface layer and the lower surface layer respectively account for 30 percent, and the core layer accounts for 40 percent;
(3) heating and foaming;
(4) hot pressing;
preferably, the pine wood in the step (1) is radiata pine.
In any of the above schemes, preferably, the foaming material, the MDI adhesive, and the emulsified paraffin are sequentially added in step (1).
In any scheme, the addition amounts of the foaming material, the MDI adhesive and the emulsified paraffin in the step (1) are 1.6-2: 1: 0.3-0.5.
In any scheme, the addition amounts of the foaming material, the MDI adhesive and the emulsified paraffin in the step (1) are 1.6: 1: 0.3.
in any scheme, the addition amounts of the foaming material, the MDI adhesive and the emulsified paraffin in the step (1) are 1.8: 1: 0.4.
in any scheme, the addition amounts of the foaming material, the MDI adhesive and the emulsified paraffin in the step (1) are 2: 1: 0.5. in any of the above schemes, preferably, the temperature in the step (3) is raised to 60-80 ℃ for foaming, and the time is 4-6 min.
In any of the above embodiments, preferably, in the step (3), the temperature is raised to 60 ℃ to foam for 6 min.
In any of the above embodiments, preferably, in the step (3), the temperature is raised to 70 ℃ to foam for 5 min.
In any of the above embodiments, preferably, in the step (3), the temperature is raised to 80 ℃ to foam for 4 min.
In any of the above schemes, it is preferable that the temperature is raised to 190-.
In any of the above embodiments, preferably, the temperature is raised to 190 ℃ during the hot pressing in the step (4), the pressure is 7MPa, and the hot pressing time is 180 s.
In any of the above embodiments, it is preferable that the temperature is raised to 200 ℃ at the time of hot pressing in the step (4), the pressure is 8MPa, and the hot pressing time is 150 s.
In any of the above embodiments, it is preferable that the temperature is raised to 210 ℃ during the hot pressing in the step (4), the pressure is 9MPa, and the hot pressing time is 120 s.
The invention also provides application of the ultralow-density flame-retardant oriented strand board in the aspects of building, furniture, ship and vehicle interior decoration.
The oriented strand board is prepared into a 15cm-20cm long sheet form by using pine or bamboo through a rotary cutting process, phenolic glue or MDI glue or urea-formaldehyde resin glue is fully sprayed and fully mixed with rotary-cut shavings by using a glue applying system, the shavings have better water resistance than wood after being added with modified emulsified paraffin and a waterproof agent, the shavings are longitudinally arranged according to the fiber direction after glue mixing, and oriented paving is carried out, namely two adjacent layers of the big shavings and the small shavings are mutually perpendicular.
Advantageous effects
(1) The invention provides an ultra-low density flame-retardant oriented strand board and a preparation method thereof.A foaming material is added, the combined polyether polyol and MDI are used for foaming to a low degree under the action of a catalyst, and polyurethane foam is used for filling gaps among strands, so that the quality of the strand board is greatly improved, the internal bonding strength, the elastic modulus and the static bending strength are obviously improved, and the fireproof function can be realized;
(2) the ultra-low density oriented strand board prepared by the application has good mechanical property;
(3) the ultra-low-density flame-retardant oriented strand board prepared by the application has the advantages of good fireproof performance, high strength and strong impact resistance and bending resistance.
Detailed Description
In order to further understand the technical features of the present invention, the present invention is described in detail with reference to the specific embodiments below. The embodiments are given by way of illustration only and not by way of limitation, and any insubstantial modifications, based on the present disclosure, may be made by those skilled in the art without departing from the scope of the present disclosure.
Example 1
A preparation method of an ultra-low density flame-retardant oriented strand board comprises the following steps:
(1)400g-450g of radiata pine wood shavings, sequentially adding 45-50g of foaming material, 27g of MDI adhesive and 9-12g of emulsified paraffin (solid paraffin) and stirring for 30min (through multiple test comparisons, the addition sequence of the foaming material, the MDI adhesive and the emulsified paraffin has influence on the internal bonding strength of a subsequently prepared shaving board, and after the foaming material, the MDI adhesive and the emulsified paraffin are added according to the sequence, the internal bonding strength of the prepared shaving board is higher);
(2) directionally paving in a 30m by 30cm mould, wherein the ratio of wood shavings is that the upper surface layer and the lower surface layer respectively account for 30 percent, and the core layer accounts for 40 percent;
(3) putting the plate blank into a hot press, placing a steel plate above the plate blank, lowering the press to the height of the plate blank, heating to 70 ℃, and foaming for 5 min;
(4) after foaming is finished, the press is lowered to the set thickness of the plate, and heating is started, wherein the temperature is 200 ℃, the pressure is 8MPa, and the hot pressing time is 150 s;
(5) after cooling, edge sawing is carried out, and stacking and placing are carried out for 72h maintenance in indoor environment.
In this embodiment, the foaming material used in step (1) is prepared from the following components: 60 parts of polyether polyol, 18 parts of isocyanate, 2 parts of antioxidant, 2 parts of foaming agent, 6 parts of chain extender, 1 part of pigment, 3 parts of plasticizer and 3 parts of phosphorus flame retardant. Specifically, the antioxidant is tert-butyl hydroquinone (TBHQ), the chain extender is diethylene glycol (DEG), the pigment is iron red, the plasticizer is phthalate, and the phosphorus flame retardant is tributyl phosphate (TBP).
The further optimized technical scheme of the embodiment is that the polyether polyol comprises polyether diol, polyether triol and polyether tetraol, wherein the mass ratio of the polyether diol to the polyether triol to the polyether tetraol is 1: 1.5.
the technical scheme of the further optimization of the embodiment is that the foaming agent comprises the following raw materials in percentage by mass: 25% of cyclopentane, 25% of isobutane, 20% of n-pentane, 20% of nano silicon dioxide and 10% of aluminum dihydrogen phosphate.
And (3) carrying out performance detection on the prepared oriented strand board:
detection criteria are according toNational standard for GBT 4897-Comparative examples were conducted comparing a commercially available ordinary low density board (filled with a lightweight material) with the ultra low density board prepared in this example, and the results of the tests are shown in table 1 below:
table 1 results of performance tests on ultra-low density oriented strand board and general ultra-low density strand board prepared in example 1
The test results in the table 1 show that the particle board prepared by optimizing the component raw materials and the preparation method has good mechanical strength, and no surface delamination phenomenon is found after the particle board is soaked in water at 40 ℃ for 24 hours, so that the particle board has good waterproof performance, high internal bonding strength, high elastic modulus, static bending strength and the like, and has a flame retardant effect. The particle board has excellent application potential and industrial production value through specific selection and use of components and improvement and optimization of a preparation process.
Example 2
An ultra-low density flame retardant oriented strand board similar to example 1, except that the foam comprises the following raw materials in parts by weight: 50 parts of polyether polyol, 15 parts of isocyanate, 1 part of antioxidant, 1 part of foaming agent, 4 parts of chain extender, 0.5 part of pigment, 2 parts of plasticizer and 2 parts of phosphorus flame retardant.
Example 3
An ultra-low density flame retardant oriented strand board similar to example 1, except that the foam comprises the following raw materials in parts by weight: 55 parts of polyether polyol, 16 parts of isocyanate, 1.5 parts of antioxidant, 1.5 parts of foaming agent, 5 parts of chain extender, 0.6 part of pigment, 2.5 parts of plasticizer and 2.5 parts of phosphorus flame retardant.
Example 4
An ultra-low density flame retardant oriented strand board similar to example 1, except that the foam comprises the following raw materials in parts by weight: 65 parts of polyether polyol, 19 parts of isocyanate, 3.5 parts of antioxidant, 3.5 parts of foaming agent, 7 parts of chain extender, 1.5 parts of pigment, 3.5 parts of plasticizer and 3.5 parts of phosphorus flame retardant.
Example 5
An ultra-low density flame retardant oriented strand board similar to example 1, except that the foam comprises the following raw materials in parts by weight: 70 parts of polyether polyol, 20 parts of isocyanate, 4 parts of antioxidant, 4 parts of foaming agent, 8 parts of chain extender, 2 parts of pigment, 4 parts of plasticizer and 4 parts of phosphorus flame retardant.
Example 6
An ultra-low density flame retardant oriented strand board similar to example 1 except that the polyether diol, polyether triol and polyether tetraol were used in a ratio of 0.5: 0.5: 1.
example 7
An ultra-low density flame retardant oriented strand board similar to example 1 except that the polyether diol, polyether triol and polyether tetraol were used in a ratio of 2: 2: 3.
example 8
An ultra-low density flame retardant oriented strand board similar to example 1, except that the blowing agent comprises the following raw materials in percentage by mass: 15% of cyclopentane, 30% of isobutane, 30% of n-pentane, 15% of nano silicon dioxide and 10% of aluminum dihydrogen phosphate.
Example 9
An ultra-low density flame retardant oriented strand board similar to example 1, except that the blowing agent comprises the following raw materials in percentage by mass: 30% of cyclopentane, 20% of isobutane, 15% of n-pentane, 25% of nano silicon dioxide and 10% of aluminum dihydrogen phosphate.
Example 10
An ultra-low density flame retardant oriented strand board similar to example 1, except that the amount of the foaming material, the MDI adhesive and the emulsified paraffin added in step (1) is 1.6: 1: 0.3.
example 11
An ultra-low density flame retardant oriented strand board similar to example 1, except that the amount of the foaming material, the MDI adhesive and the emulsified paraffin added in step (1) is 1.8: 1: 0.4.
example 12
An ultra-low density flame retardant oriented strand board similar to example 1, except that the amount of the foaming material, the MDI adhesive and the emulsified paraffin added in step (1) is 2: 1: 0.5.
example 13
An ultra-low density flame retardant oriented strand board, similar to example 1, except that in step (3), the temperature was raised to 55 ℃ for foaming for 6 min.
Example 14
An ultra-low density flame-retardant oriented strand board, similar to example 1, except that the temperature was raised to 60 ℃ in the step (3) for foaming for 5 min.
Example 15
An ultra-low density flame retardant oriented strand board, similar to example 1, except that in step (3), the temperature was raised to 80 ℃ and foaming was carried out for 4 min.
Example 16
An ultra-low density flame-retardant oriented strand board, similar to example 1, except that the temperature was raised to 190 ℃ at the time of hot pressing in step (4), the pressure was 7MPa, and the hot pressing time was 180 s.
Example 17
An ultra-low density flame-retardant oriented strand board, similar to example 1, except that the temperature was raised to 210 ℃ during the hot pressing in the step (4), the pressure was 9MPa, and the hot pressing time was 120 s.
The ultra-low density flame-retardant shaving board prepared in the embodiments 2 to 17 has obvious advantages in the aspects of mechanical properties such as waterproof property, impact resistance and bending resistance. According to the shaving board disclosed by the invention, the foaming material is added during preparation, the combined polyether polyol and MDI are used for carrying out low-degree foaming under the action of the catalyst, and the polyurethane foam is used for filling gaps among the shaving boards, so that the quality of the shaving board is greatly improved, the internal bonding strength, the elastic modulus and the static bending strength are obviously improved, and the fireproof function can be realized.
The above-described embodiments are only illustrative and not restrictive, and any insubstantial modifications of the invention made by those skilled in the art are intended to be covered by the present invention.
Claims (10)
1. A foaming material for a shaving board is characterized in that: the material comprises the following components by weight: 50-70 parts of polyether polyol, 15-20 parts of isocyanate, 1-4 parts of antioxidant, 1-4 parts of foaming agent, 4-8 parts of chain extender, 0.5-2 parts of pigment, 2-4 parts of plasticizer and 2-4 parts of phosphorus flame retardant.
2. The foam material for particle board according to claim 1, wherein: the material comprises the following components by weight: 55-65 parts of polyether polyol, 16-19 parts of isocyanate, 1.5-3.5 parts of antioxidant, 1.5-3.5 parts of foaming agent, 5-7 parts of chain extender, 0.6-1.5 parts of pigment, 2.5-3.5 parts of plasticizer and 2.5-3.5 parts of phosphorus flame retardant.
3. The foamed material for particle board according to claim 1 or 2, characterized in that: the polyether polyol comprises at least one of polyether diol, polyether triol and polyether tetraol.
4. The foam material for particle board according to claim 3, wherein: the polyether polyol is a mixture of polyether diol, polyether triol and polyether tetraol.
5. The foamed material for particle board according to claim 4, wherein: the dosage ratio of the polyether diol to the polyether triol to the polyether tetraol is 0.5-2: 0.5-2: 1-3.
6. The foamed material for particle board according to claim 1 or 2, characterized in that: the foaming agent comprises the following raw materials in percentage by mass: 15-30% of cyclopentane, 20-30% of isobutane, 15-30% of n-pentane, 15-25% of nano silicon dioxide and 5-15% of aluminum dihydrogen phosphate.
7. An ultra-low density flame retardant oriented strand board prepared using the foamed material of claim 1 or 2, wherein: pine wood shavings are adopted, a foaming material, an adhesive and emulsified paraffin are added, the mixture is paved after being stirred, and the mixture is molded after hot pressing.
8. The process of preparing ultra-low density flame retardant oriented strand board of claim 7, wherein: the method comprises the following steps:
(1) after the pine wood is shaved, adding a foaming material, an MDI adhesive and emulsified paraffin and stirring;
(2) directionally paving, wherein the wood shaving proportion is that the upper surface layer and the lower surface layer respectively account for 30 percent, and the core layer accounts for 40 percent;
(3) heating and foaming;
(4) and (5) hot pressing.
9. The process of preparing ultra-low density flame retardant oriented strand board of claim 8, wherein: and (2) sequentially adding the foaming material, the MDI adhesive and the emulsified paraffin in the step (1).
10. Use of the ultra low density flame retardant oriented strand board of claim 8 or 9 in the interior decoration of buildings, furniture, ships and vehicles.
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