CN113844134A - High-strength mineral wood fiberboard and preparation method thereof - Google Patents

High-strength mineral wood fiberboard and preparation method thereof Download PDF

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Publication number
CN113844134A
CN113844134A CN202111247941.1A CN202111247941A CN113844134A CN 113844134 A CN113844134 A CN 113844134A CN 202111247941 A CN202111247941 A CN 202111247941A CN 113844134 A CN113844134 A CN 113844134A
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China
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parts
layer
fiberboard
phosphate
melamine resin
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CN202111247941.1A
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Inventor
张剑青
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Changzhou Liqun Decoration Material Co Ltd
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Changzhou Liqun Decoration Material Co Ltd
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Priority to CN202111247941.1A priority Critical patent/CN113844134A/en
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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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/06—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper layer
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance

Abstract

The invention provides a high-strength wood fiberboard and a preparation method thereof, and belongs to the technical field of fiberboards. The high-strength wood fiberboard comprises a fiberboard layer, wherein the fiberboard layer mainly comprises magnesium oxide, plant fiber and inorganic salt, the magnesium oxide and the inorganic salt have a good waterproof effect, and the plant fiber has good heat insulation performance. Furthermore, the invention controls the proportion of phosphate and the gradation of plant fiber, so that the fiber board has high strength. Furthermore, the decorative layer and the sealing layer are adhered to the two sides of the surface of the fiberboard layer, so that compared with the traditional SPC stone-plastic board, the wear-resisting, scratch-resisting and stain-resisting performances of the high-strength wood fiberboard are improved.

Description

High-strength mineral wood fiberboard and preparation method thereof
Technical Field
The invention relates to the technical field of fiberboards, in particular to a high-strength mineral wood fiberboard and a preparation method thereof.
Background
The SPC stone plastic plate is a plate which is made by feeding and mixing raw materials such as polyvinyl chloride (PVC) powder, stone powder, a stabilizer, a plasticizer, a lubricant, a filler and the like in a certain order, adding the mixture into a double-screw extruder for extrusion and calendaring molding, and adhering a PVC color film decorative layer on the surface of the mixture. However, SPC stone-plastic boards have problems of poor heat insulation performance and the like.
Disclosure of Invention
The invention aims to provide a high-strength mineral wood fiberboard and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-strength wood fiberboard, which comprises a fiberboard layer; the fiberboard layer comprises the following preparation raw materials in parts by weight:
15-30 parts of light-burned magnesium oxide, 10-20 parts of magnesium sulfate, 5-10 parts of talcum powder, 60-80 parts of plant fiber, 1-2 parts of phosphate, 2-5 parts of sulfuric acid and 5-10 parts of water; the mass fraction of the sulfuric acid is 50-60%.
Preferably, the decorative layer, the fiberboard layer and the sealing layer are sequentially laminated, bonded and contacted through melamine resin.
Preferably, the sealing layer comprises the following preparation raw materials in parts by weight: 40-55 parts of titanium white paper, 1-2 parts of printing ink and 40-60 parts of melamine resin.
Preferably, the decorative layer comprises the following preparation raw materials in parts by weight: 30-40 parts of white titanium paper, 1-2 parts of printing ink, 15-60 parts of aluminum oxide and 20-45 parts of melamine resin.
Preferably, the phosphate comprises orthophosphate or condensed phosphate.
Preferably, the orthophosphate comprises sodium phosphate, calcium phosphate, magnesium phosphate, potassium phosphate or iron phosphate; the condensed phosphate comprises sodium hexametaphosphate or sodium tripolyphosphate.
Preferably, the plant fiber comprises the following components in percentage by mass: 20-30% of plant fiber with the length of 3-10 mm, 40-60% of plant fiber with the length of 1-3 mm, and 20-40% of wood flour with the particle size of 100-500 meshes.
The invention provides a preparation method of the high-strength wood fiberboard, which comprises the following steps:
mixing the preparation raw materials of the fiberboard layers to obtain a mixture;
paving the mixture into a plate blank, and compacting to obtain a single-layer plate;
and stacking the single-layer boards into a mold, carrying out mold pressing, dismantling the mold, and drying, sanding and maintaining the obtained boards in sequence to form a fiberboard layer so as to obtain the high-strength wood fiberboard.
Preferably, when the high-strength wood fiber board further comprises a sealing layer and a decorative layer, the method further comprises the following steps:
printing ink on the titanium white paper to obtain decorative layer base paper; mixing aluminum oxide and melamine resin to obtain impregnating resin; impregnating resin on the first coating part of the surface of the base paper of the decorative layer, coating the rest impregnated resin after the first drying, and obtaining the decorative layer after the second drying;
printing ink on the titanium white paper to obtain base paper of the sealing layer, coating part of melamine resin on the surface of the base paper of the sealing layer in a third way, coating the rest melamine resin in a third way after third drying, and drying in a fourth way to obtain the sealing layer;
and sequentially laminating the decorative layer, the fiberboard layer and the sealing layer, and performing hot-pressing curing to obtain the high-strength wood fiberboard.
Preferably, the pressure of the die pressing is 5-15 MPa, and the pressure maintaining time is 100-120 h. .
The invention provides a high-strength wood fiberboard, which comprises a fiberboard layer; the fiberboard layer comprises the following preparation raw materials in parts by weight: 15-30 parts of light-burned magnesium oxide, 10-20 parts of magnesium sulfate, 5-10 parts of talcum powder, 60-80 parts of plant fiber, 1-2 parts of phosphate, 2-5 parts of sulfuric acid and 5-10 parts of water; the mass fraction of the sulfuric acid is 50-60%.
In the high-strength wood fiberboard provided by the invention, the components of the fiberboard layer mainly comprise magnesium oxide, plant fiber and inorganic salt, the magnesium oxide and the inorganic salt have good waterproof effect, and the plant fiber has good heat insulation performance.
Furthermore, the invention controls the proportion of phosphate and the gradation of plant fiber, so that the fiber board has high strength.
Furthermore, the decorative layer and the sealing layer are adhered to the two sides of the surface of the fiberboard layer, and the surfaces of the decorative layer and the sealing layer are made of melamine resin, so that compared with the traditional SPC stone-plastic board, the wear-resisting, scratch-resisting and stain-resisting performances of the high-strength wood fiberboard are improved.
In addition, the high-strength wood fiberboard can meet the strength requirement without arranging a glass fiber layer, and the fiberboard layer does not contain hydrochloride, has stable moisture content and is difficult to absorb water and deform, so that the high-strength wood fiberboard has good dimensional stability and avoids the problems of bittern return and moisture return. Moreover, the fiber board layer of the invention adopts plant fiber as the main raw material and is completely degradable.
Detailed Description
The invention provides a high-strength wood fiberboard, which comprises a fiberboard layer; the fiberboard layer comprises the following preparation raw materials in parts by weight:
15-30 parts of light-burned magnesium oxide, 10-20 parts of magnesium sulfate, 5-10 parts of talcum powder, 60-80 parts of plant fiber, 1-2 parts of phosphate, 2-5 parts of sulfuric acid and 5-10 parts of water; the mass fraction of the sulfuric acid is 50-60%.
In the present invention, the starting materials used are all commercially available products well known in the art, unless otherwise specified.
The high strength wood fiberboard provided by the present invention comprises a fiberboard layer. In the invention, the thickness of the fiberboard layer is preferably 6-15 mm, more preferably 8-12 mm, and further preferably 9-11 mm.
The preparation raw materials of the fiberboard layer comprise, by weight, 15-30 parts of light-burned magnesium oxide, preferably 18-27 parts of light-burned magnesium oxide, and more preferably 20-25 parts of light-burned magnesium oxide. In the invention, the light-burned magnesium oxide has good waterproof performance.
Based on the weight parts of the light-burned magnesium oxide, the raw materials for preparing the fiberboard layer comprise 10-20 parts of magnesium sulfate, preferably 12-18 parts of magnesium sulfate, and more preferably 14-16 parts of magnesium sulfate.
Based on the weight parts of the light-burned magnesium oxide, the preparation raw material of the fiberboard layer comprises 5-10 parts of talcum powder, preferably 6-9 parts, and more preferably 7-8 parts.
Based on the weight parts of the light-burned magnesium oxide, the preparation raw materials of the fiberboard layer comprise 60-80 parts of plant fibers, preferably 65-75 parts, and more preferably 68-72 parts. In the present invention, the plant fiber preferably includes, in mass percent: 20-30% of plant fiber with the length of 3-10 mm, 40-60% of plant fiber with the length of 1-3 mm, and 20-40% of wood flour with the particle size of 100-500 meshes. The invention has no special requirement on the types of the plant fibers with different grades, and the plant fibers well known in the field can be selected, and can be pine fibers and poplar fibers. By adopting the graded plant fibers, the compactness of the board and the tension between the plant fibers are favorably improved, and the strength of the high-strength wood fiber board is further improved.
Based on the weight parts of the light-burned magnesium oxide, the preparation raw material of the fiberboard layer comprises 1-2 parts of phosphate, preferably 1.2-1.8 parts, and more preferably 1.4-1.6 parts. In the present invention, the phosphate preferably includes orthophosphate or condensed phosphate; the orthophosphate preferably comprises sodium phosphate, calcium phosphate, magnesium phosphate, potassium phosphate or iron phosphate; the condensed phosphates preferably include sodium hexametaphosphate and sodium tripolyphosphate. In the invention, the phosphate plays a role in improving the internal binding force of the fiberboard, improving the strength of the board and enhancing the waterproof performance.
Based on the weight parts of the light-burned magnesium oxide, the preparation raw material of the fiberboard layer comprises 2-5 parts of sulfuric acid, preferably 2.5-4.5 parts, and more preferably 3-4 parts. In the invention, the mass fraction of the sulfuric acid is preferably 50-60%, and more preferably 52-58%. In the present invention, the sulfuric acid functions to promote the components to react sufficiently.
As a further preferable scheme, the high-strength wood fiber board provided by the invention further comprises a decoration layer and a sealing layer, wherein the decoration layer, the fiber board layer and the sealing layer are sequentially laminated, bonded and contacted through melamine resin. In the invention, the thickness of the decorative layer is preferably 0.1-4.0 mm; the thickness of the sealing layer is preferably 0.1-0.3 mm.
In the present invention, the sealing layer as a whole preferably comprises the following preparation raw materials in parts by weight: 40-55 parts of titanium white paper, 1-2 parts of printing ink and 40-60 parts of melamine resin.
The white titanium paper, the ink and the melamine resin are not particularly limited in the present invention, and the white titanium paper, the ink and the melamine resin which are well known in the art can be used. In the invention, the mass fraction of the melamine resin is preferably 55-65%; the solvent for the melamine resin is preferably methanol or formaldehyde.
In the invention, the weight part of the titanium white paper is preferably 45-50 parts; the weight part of the ink is preferably 1.3-1.7 parts; the melamine resin is preferably 44-55 parts by weight. The sealing layer is prepared from the raw materials, so that the moisture and water resistance is facilitated. The weight portion of the melamine resin refers to the sum of the weight portions of pure melamine and solvent.
In the present invention, the decorative layer as a whole preferably comprises the following preparation raw materials in parts by weight: 30-40 parts of white titanium paper, 1-2 parts of printing ink, 15-60 parts of aluminum oxide and 20-45 parts of melamine resin.
The raw materials for preparing the decorative layer comprise, by weight, 30-40 parts of titanium white paper, preferably 32-38 parts of titanium white paper, and more preferably 34-36 parts of titanium white paper.
Based on the weight parts of the titanium white paper, the preparation raw material of the decorative layer comprises 1-2 parts of printing ink, preferably 1.2-1.8 parts, and more preferably 1.4-1.6 parts.
Based on the weight parts of the titanium white paper, the preparation raw material of the decorative layer comprises 15-60 parts of aluminum oxide, preferably 20-55 parts, and more preferably 30-50 parts.
Based on the weight parts of the titanium white paper, the preparation raw material of the decorative layer comprises 20-45 parts of melamine resin, preferably 25-40 parts, and more preferably 28-35 parts. In the invention, the mass fraction of the melamine resin used for preparing the decorative layer is preferably 55-65%; the solvent for the melamine resin is preferably methanol or formaldehyde. The weight portion of the melamine resin refers to the sum of the weight portions of pure melamine and solvent.
The decorative layer prepared by the raw materials has the effects of wear resistance, scratch resistance, moisture resistance, water resistance, fire resistance, flame retardance, vivid texture and strong decoration.
According to the invention, the decorative layer and the sealing layer are adhered to the two sides of the surface of the fiberboard layer, and the melamine resin is adopted on the surfaces of the decorative layer and the sealing layer, so that compared with the traditional SPC stone-plastic board, the wear-resisting, scratch-resisting and stain-resisting performances of the high-strength wood fiberboard are improved.
The invention provides a preparation method of the high-strength wood fiberboard, which comprises the following steps:
mixing the preparation raw materials of the fiberboard layers to obtain a mixture;
paving the mixture into a plate blank, and compacting to obtain a single-layer plate;
and stacking the single-layer boards into a mold, carrying out mold pressing, dismantling the mold, and drying, sanding and maintaining the obtained boards in sequence to form a fiberboard layer so as to obtain the high-strength wood fiberboard.
According to the invention, the preparation raw materials of the fiberboard layer are mixed to obtain a mixture. The invention has no special requirements on the mixing process, and can uniformly mix all the preparation raw materials. In the embodiment of the invention, the material mixing equipment is adopted for stirring for 40-60 minutes.
After the mixture is obtained, the mixture is paved into a plate blank, and the single-layer plate is obtained after the plate blank is compacted. The invention preferably conveys the mixture to an automatic paving device, and the mixture is uniformly paved into a formed slab in the whole width through an automatic feeding hopper. In the invention, the thickness of the plate blank is preferably 40-85 mm. In the invention, the compaction is preferably carried out by adopting a 3200T press, the pressure is preferably 10-15 MPa, and the pressure maintaining time is preferably 20-25 s.
After the single-layer board is obtained, the single-layer board is stacked in a mold, the mold is pressed, the mold is removed, the obtained board is dried, sanded and cured in sequence to form a fiberboard layer, and the high-strength wood fiberboard is obtained.
In the present invention, the number of stacked layers in a single mold is preferably not more than 30, and it is sufficient to adjust the number according to the target thickness by the skill in the art. In the invention, the pressure of the die pressing is preferably 5-15 MPa, and more preferably 6-12 MPa; the dwell time is preferably 100 to 120 hours, and more preferably 112 to 117 hours. In the invention, the drying is preferably carried out in a drying tunnel, the air speed of the drying tunnel is preferably 20-35 m/s, the inlet temperature is preferably 130-150 ℃, and the outlet temperature is preferably 60-70 ℃. The invention has no special requirement on the drying time, and the moisture content of the dried fiberboard is preferably 8-10%.
The invention has no special requirements on the sanding process, and the sanding process well known in the field can be adopted. The method preferably cuts the dried plate according to the required specification, and transmits the plate to an automatic sander to sand with 80-mesh and 150-mesh sand paper according to the plate surface requirement; the sanded plate is preferably subjected to a dust removal process through an air duct and dust brushing equipment.
In the present invention, the curing is preferably performed in a moisture balance kiln, and the curing preferably comprises: and placing the sanded plate in a moisture balance kiln for 48-72 hours. In the invention, the humidity of the moisture balance kiln is preferably 20-30% RH. The invention further balances the water content of the edges and the middle of the plate by using the health preserving. According to the invention, the moisture content of the fiberboard layer obtained after curing is 5-15%.
In the present invention, when the high strength wood fiber board further includes a sealing layer and a decorative layer, the present invention preferably further includes the steps of:
printing ink on the titanium white paper to obtain decorative layer base paper; mixing aluminum oxide and melamine resin to obtain impregnating resin; impregnating resin on the first coating part of the surface of the base paper of the decorative layer, coating the rest impregnated resin after the first drying, and obtaining the decorative layer after the second drying;
printing ink on the titanium white paper to obtain base paper of the sealing layer, coating part of melamine resin on the surface of the base paper of the sealing layer in a third way, coating the rest melamine resin in a third way after third drying, and drying in a fourth way to obtain the sealing layer;
and sequentially laminating the decorative layer, the fiberboard layer and the sealing layer, and performing hot-pressing curing to obtain the high-strength wood fiberboard.
Printing ink on titanium white paper to obtain base paper of a decorative layer; mixing aluminum oxide and melamine resin to obtain impregnating resin; and (3) impregnating resin on the first coating part of the surface of the base paper of the decorative layer, coating the rest impregnated resin after the first drying, and drying the rest to obtain the decorative layer.
In the invention, the production line speed of the first coating is preferably 27-30 m/min; the production line speed of the second coating is preferably 36-60 m/min. In the invention, the mass of the partial impregnating resin is preferably 55-65% of the total mass of the impregnating resin. In the invention, the mass fraction of the impregnating resin is preferably 55-65%. In the present invention, the first drying and the second drying are preferably performed by infrared drying. The invention uses the first coating to make the impregnating resin penetrate into the base paper of the decorative layer, and uses the second coating to make the impregnating resin wrap the surface of the base paper of the decorative layer.
According to the invention, printing ink is used for printing on the titanium white paper to obtain base paper of the sealing layer, a part of melamine resin is coated on the surface of the base paper of the sealing layer in a third mode, after the third drying, the rest melamine resin is coated in a third mode, and after the fourth drying, the sealing layer is obtained. In the invention, the mass of the part of melamine resin is preferably 55-65% of the total mass of the melamine used for preparing the sealing layer; the production line speed of the third coating is preferably 25-30 m/min; the production line speed of the fourth coating is preferably 30-60 m/min. The third drying and the fourth drying are preferably infrared drying.
After the decoration layer and the sealing layer are obtained, the decoration layer, the fiberboard layer and the sealing layer are sequentially laminated, and after hot-pressing solidification, the high-strength wood fiberboard is obtained.
The invention has no special requirement on the hot-pressing curing condition, and the hot-pressing over-thickness condition well known in the field can be adopted. In the hot pressing process, the melamine resin is solidified, cured and bonded.
The high strength mineral wood fiberboard and the method for manufacturing the same according to the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
1. Mixing raw materials: 15 parts of light-burned magnesium oxide, 12 parts of magnesium sulfate, 5 parts of talcum powder, 1.5 parts of magnesium phosphate and 2 parts of sulfuric acid (the mass fraction is 52%); adding 6 parts of water into the components, and stirring the mixture until the mixture is uniform; then adding 12 parts of 3-10 mm pine fiber, 28 parts of 1-3 mm poplar fiber and 25 parts of 100-200-mesh wood powder, and stirring for 45 minutes by using a material stirring device to obtain a mixture;
2. slab paving: conveying the mixture to automatic material spreading equipment, uniformly spreading the formed plate blank on the whole width by an automatic feeding hopper, and spreading the plate blank with the thickness of 40 mm;
3. primary pressing and knotting: putting into a 3200T press for compacting and consolidating, wherein the pressure is 15MPa, and keeping for 20s to obtain a single-layer plate;
4. and (3) crystallization and solidification: stacking the single-layer plates to a pressure die, wherein the number of stacked layers of one die is 25, pressurizing the pressure die to 15MPa, and keeping the pressure die for 100 hours;
5. removing the die: taking out the plate after detecting that the strength index of the plate reaches the standard, and sawing the non-compact part at the periphery;
6. drying in a drying tunnel: the drying tunnel wind speed is 27m/s, the inlet temperature is 130 ℃, and the outlet temperature is 70 ℃;
7. cutting and sanding: cutting the dried plate according to the required specification, conveying the plate to an automatic sander for sanding with 80-mesh coarse sand for the first time, and sanding with 180-mesh abrasive paper for the second time; the sanded plate needs to be subjected to a dust removal process through an air duct and dust brushing equipment;
8. health preserving: placing the sanded board in a moisture balance kiln for 48 hours for curing, and further balancing the moisture content of the edges and the middle of the board to obtain a fiberboard layer (the moisture content is 5%);
9. preparing a decorative layer and a sealing layer: printing 2 parts of ink on 35 parts of titanium white paper to obtain base paper of the decorative layer; mixing 20 parts of aluminum oxide and 43 parts of melamine resin to obtain impregnating resin; coating partial impregnating resin (accounting for 55% of the total impregnating resin mass) on the surface of the decorative layer base paper, wherein the production line speed is 30m/min, coating the residual impregnating resin after infrared drying, wherein the production line speed is 45m/min, and drying by infrared to obtain a decorative layer;
printing 1 part of ink on 40 parts of titanium white paper to obtain base paper of a sealing layer, coating partial melamine resin (accounting for 55% of the total melamine resin mass, and 59 parts of the total melamine resin for preparing the sealing layer) on the surface of the base paper of the sealing layer at the production line speed of 30m/min, coating the residual melamine resin after infrared drying at the production line speed of 45m/min, and drying the residual melamine resin by infrared to obtain the sealing layer;
10. hot-pressing and curing: and sequentially laminating the decorative layer, the fiberboard and the sealing layer into a hot press, and carrying out high-temperature hot-pressing, curing, laminating and molding to obtain the high-strength wood fiberboard, wherein the thickness of the decorative layer is 0.3mm, the thickness of the fiberboard layer is 10mm, and the thickness of the sealing layer is 0.1 mm.
Example 2
1. Mixing raw materials: 18 parts of light-burned magnesium oxide, 15 parts of magnesium sulfate, 6 parts of talcum powder, 2 parts of calcium phosphate and 3 parts of sulfuric acid (the mass fraction is 55%); adding 5 parts of water into the components, and stirring the mixture until the mixture is uniform; then adding 15 parts of 3-10 mm straw fibers, 25 parts of 1-3 mm straw fibers and 25 parts of 100-200-mesh wood powder, and stirring for 40 minutes by using a material stirring device to obtain a mixture;
2. slab paving: conveying the mixture to automatic material spreading equipment, uniformly spreading the formed plate blank on the whole width by an automatic feeding hopper, and spreading the plate blank with the thickness of 60 mm;
3. primary pressing and knotting: putting into a 3200T press for compacting and consolidating, wherein the pressure is 12MPa, and keeping for 25s to obtain a single-layer plate;
4. and (3) crystallization and solidification: stacking the single-layer plates to a pressure die, wherein the number of stacked layers of one die is 20, pressurizing the pressure die to 10MPa, and keeping the pressure die for 115 hours;
5. removing the die: taking out the plate after detecting that the strength index of the plate reaches the standard, and sawing the non-compact part at the periphery;
6. drying in a drying tunnel: the drying tunnel has the wind speed of 20m/s, the inlet temperature of 140 ℃ and the outlet temperature of 60 ℃;
7. cutting and sanding: cutting the dried plate according to the required specification, conveying the plate to an automatic sander for primary sanding treatment by using 60-mesh coarse sand, and performing secondary sanding treatment by using 120-mesh abrasive paper; the sanded plate needs to be subjected to a dust removal process through an air duct and dust brushing equipment;
8. health preserving: placing the sanded board in a moisture balance kiln for 72 hours for curing, and further balancing the moisture content of the edges and the middle of the board to obtain a fiberboard layer (the moisture content is 8%);
9. preparing a decorative layer and a sealing layer: printing 2 parts of ink on 35 parts of titanium white paper to obtain base paper of the decorative layer; mixing 30 parts of aluminum oxide and 33 parts of melamine resin to obtain impregnating resin; coating partial impregnating resin (accounting for 60% of the total impregnating resin mass) on the surface of the base paper of the decorative layer, wherein the production line speed is 27m/min, performing infrared drying, coating the residual impregnating resin, and performing infrared drying to obtain the decorative layer, wherein the production line speed is 35 m/min;
printing 1 part of ink on 50 parts of titanium white paper to obtain base paper of a sealing layer, coating partial melamine resin (accounting for 60% of the total melamine resin mass, and 49 parts of the total melamine resin for preparing the sealing layer) on the surface of the base paper of the sealing layer at a production line speed of 27m/min, coating the residual melamine resin after infrared drying at a production line speed of 35m/min, and drying the residual melamine resin by infrared to obtain the sealing layer;
10. hot-pressing and curing: and sequentially laminating the decorative layer, the fiberboard and the sealing layer into a hot press, and carrying out high-temperature hot-pressing, curing, laminating and molding to obtain the high-strength wood fiberboard, wherein the thickness of the decorative layer is 0.2mm, the thickness of the fiberboard layer is 12mm, and the thickness of the sealing layer is 0.2 mm.
Example 3
1. Mixing raw materials: 12 parts of light-burned magnesium oxide, 7 parts of magnesium sulfate, 5 parts of talcum powder, 2 parts of magnesium phosphate and 4 parts of sulfuric acid (the mass fraction is 57%); adding 10 parts of water into the components, and stirring the mixture until the mixture is uniform; adding 20 parts of 3-10 mm straw fiber, 35 parts of 1-3 mm pine fiber and 15 parts of 100-200 mesh wood powder, and stirring for 60 minutes by using a material stirring device to obtain a mixture;
2. slab paving: conveying the mixture to automatic material spreading equipment, uniformly spreading the formed plate blank on the whole width through an automatic feeding hopper, and spreading the plate blank with the thickness of 75mm according to the requirement;
3. primary pressing and knotting: putting into 3200T press, compacting and consolidating under 15MPa for 25 s;
4. and (3) crystallization and solidification: stacking the preliminarily pressed plates to a pressure die, wherein the number of stacked layers of one die is 15, pressurizing the pressure die to 15MPa, and keeping the pressure die for 120 h;
5. removing the die: taking out the plate after detecting that the strength index of the plate reaches the standard, taking out the plate, airing the plate for 24 hours at normal temperature, and then putting the plate into a drying tunnel;
6. drying in a drying tunnel: the drying tunnel wind speed is 35m/s, the inlet temperature is 170 ℃, and the outlet temperature is 80 ℃; the moisture content of the dried fiberboard is 8%;
7. cutting and sanding: cutting the dried plate to length according to the required specification, and conveying the plate to an automatic sander for sanding by using 100-mesh abrasive paper according to the plate surface requirement; dedusting the sanded plate by electrostatic brushing;
8. secondary health preserving: placing the sanded board in a moisture balance kiln for 24 hours for curing, and accelerating the moisture balance speed at the edge by adopting a humidifying method to obtain a fiberboard layer (the moisture content is 12%);
9. preparing a decorative layer and a sealing layer: printing 2 parts of printing ink on 40 parts of titanium white paper to obtain base paper of the decorative layer; mixing 20 parts of aluminum oxide and 38 parts of melamine resin to obtain impregnating resin; coating partial impregnating resin (accounting for 65% of the total impregnating resin mass) on the surface of the base paper of the decorative layer, wherein the production line speed is 25m/min, performing infrared drying, coating the residual impregnating resin, and performing infrared drying to obtain the decorative layer, wherein the production line speed is 30 m/min;
printing 1 part of ink on 55 parts of titanium white paper to obtain base paper of a sealing layer, coating partial melamine resin (accounting for 65% of the total melamine resin mass, and preparing 44 parts of the total melamine resin of the sealing layer) on the surface of the base paper of the sealing layer at the production line speed of 25m/min, coating the residual melamine resin after infrared drying at the production line speed of 30m/min, and drying the residual melamine resin by infrared to obtain the sealing layer;
10. hot-pressing and curing: and sequentially laminating the decorative layer, the fiberboard and the sealing layer into a hot press, and carrying out high-temperature hot-pressing, curing, laminating and molding to obtain the high-strength wood fiberboard, wherein the thickness of the decorative layer is 2mm, the thickness of the fiberboard layer is 10mm, and the thickness of the sealing layer is 0.3 mm.
And (3) performance testing:
1. the high-strength wood fiber board prepared in examples 1 to 3 was subjected to a waterproof performance test:
the test method comprises the following steps: ASTM D1037-12, section 23, method B, the test results are shown in Table 1.
TABLE 1 Water repellency Properties of examples 1 to 3
Figure BDA0003321732590000101
Figure BDA0003321732590000111
2. The high-strength wood fiber boards prepared in examples 1 to 3 were subjected to a heat insulation performance test, the test method comprising: ASTM E648-17a Standard test method for Critical radiant flux of floor covering System Using radiant Heat Source, test results showed that the Critical radiant flux of examples 1-3 was 1.09W/cm2Meets the requirement of the I-level indoor floor veneer (the I-level requirement is more than or equal to 0.45W/cm)2The requirement of II level is more than or equal to 0.22W/cm2)。
3. The high-strength wood fiber board prepared in examples 1 to 3 was subjected to a bonding strength test:
test methods refer to EN 622-2:2004&EN 10871:1995&EN 319:1993, test results show, examples1 to 3 bonding strengths of 2.20N/mm, respectively2、2.77N/mm2And 2.42N/mm2More than or equal to 0.25N/mm meeting the standard requirement2。
4. The wear resistance of the high-strength wood fiber board prepared in the embodiment 1-3 is tested, and the test standard is as follows: EN 13329:2016+ A1:2017Annex E, the test results are shown in Table 2.
TABLE 2 abrasion resistance of examples 1 to 3
Figure BDA0003321732590000112
From the results of table 1, it can be seen that the abrasion resistance of the high strength wood fiberboard prepared by the present invention satisfies the AC5 rating. Note: the higher the rating, the better the abrasion resistance, the highest rating being AC 6. The IP values (r) of AC1, AC2, AC3, AC4, AC5 and AC6 are respectively equal to or more than 500, equal to or more than 1000, equal to or more than 2000, equal to or more than 4000, equal to or more than 6000 and equal to or more than 8500.
5. The high-strength wood fiber boards prepared in examples 1 to 3 were subjected to dimensional stability tests, and the test standards refer to: ASTM F2199-20. The test results are shown in Table 3.
TABLE 3 dimensional stability of examples 1-3
Figure BDA0003321732590000113
As can be seen from the results of table 3, the high strength wood fiberboard prepared according to the present invention has good dimensional stability.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A high strength wood fiberboard comprising a fiberboard layer; the fiberboard layer comprises the following preparation raw materials in parts by weight:
15-30 parts of light-burned magnesium oxide, 10-20 parts of magnesium sulfate, 5-10 parts of talcum powder, 60-80 parts of plant fiber, 1-2 parts of phosphate, 2-5 parts of sulfuric acid and 5-10 parts of water; the mass fraction of the sulfuric acid is 50-60%.
2. The high strength wood fiber board of claim 1, further comprising a decorative layer and a sealing layer, wherein the decorative layer, the fiber board layer and the sealing layer are sequentially laminated, bonded and contacted by melamine resin.
3. The high strength wood fiberboard of claim 2, wherein the sealing layer comprises the following raw materials in parts by weight: 40-55 parts of titanium white paper, 1-2 parts of printing ink and 40-60 parts of melamine resin.
4. The high-strength wood fiberboard of claim 2, wherein the decorative layer comprises the following raw materials in parts by weight: 30-40 parts of white titanium paper, 1-2 parts of printing ink, 15-60 parts of aluminum oxide and 20-45 parts of melamine resin.
5. A high strength lignocellulosic board according to any of claims 1 to 4 wherein the phosphate comprises orthophosphate or condensed phosphate.
6. The high strength wood fiberboard of claim 5, wherein the orthophosphates comprise sodium phosphate, calcium phosphate, magnesium phosphate, potassium phosphate, or iron phosphate; the condensed phosphate comprises sodium hexametaphosphate or sodium tripolyphosphate.
7. The high strength wood fiber board according to any one of claims 1 to 4, wherein the plant fiber comprises, in mass percent: 20-30% of plant fiber with the length of 3-10 mm, 40-60% of plant fiber with the length of 1-3 mm, and 20-40% of wood flour with the particle size of 100-500 meshes.
8. A method of making the high strength wood fiberboard of any one of claims 1 to 7, comprising the steps of:
mixing the preparation raw materials of the fiberboard layers to obtain a mixture;
paving the mixture into a plate blank, and compacting to obtain a single-layer plate;
and stacking the single-layer boards into a mold, carrying out mold pressing, dismantling the mold, and drying, sanding and maintaining the obtained boards in sequence to form a fiberboard layer so as to obtain the high-strength wood fiberboard.
9. The method of claim 8, wherein when the high strength wood fiber board further comprises a sealing layer and a decorative layer, further comprising the steps of:
printing ink on the titanium white paper to obtain decorative layer base paper; mixing aluminum oxide and melamine resin to obtain impregnating resin; impregnating resin on the first coating part of the surface of the base paper of the decorative layer, coating the rest impregnated resin after the first drying, and obtaining the decorative layer after the second drying;
printing ink on the titanium white paper to obtain base paper of the sealing layer, coating part of melamine resin on the surface of the base paper of the sealing layer in a third way, coating the rest melamine resin in a third way after third drying, and drying in a fourth way to obtain the sealing layer;
and sequentially laminating the decorative layer, the fiberboard layer and the sealing layer, and performing hot-pressing curing to obtain the high-strength wood fiberboard.
10. The production method according to claim 8 or 9, wherein the pressure of the molding is 5 to 15MPa, and the dwell time is 100 to 120 hours.
CN202111247941.1A 2021-10-26 2021-10-26 High-strength mineral wood fiberboard and preparation method thereof Pending CN113844134A (en)

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CN110746174A (en) * 2019-11-14 2020-02-04 福建省德锐新材有限公司 A-grade fireproof mineral board and preparation method thereof
CN112851290A (en) * 2019-11-12 2021-05-28 马雯瑾 Wood and straw fiberboard utilizing inorganic adhesive and preparation method thereof
CN113389347A (en) * 2021-07-14 2021-09-14 德尔未来科技控股集团股份有限公司 High-simulation digital printing decorative paper laminate wood floor and preparation method thereof

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CN112851290A (en) * 2019-11-12 2021-05-28 马雯瑾 Wood and straw fiberboard utilizing inorganic adhesive and preparation method thereof
CN110746174A (en) * 2019-11-14 2020-02-04 福建省德锐新材有限公司 A-grade fireproof mineral board and preparation method thereof
CN113389347A (en) * 2021-07-14 2021-09-14 德尔未来科技控股集团股份有限公司 High-simulation digital printing decorative paper laminate wood floor and preparation method thereof

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