WO2018040800A1 - 原木纹理的重组木板材及其制造方法 - Google Patents

原木纹理的重组木板材及其制造方法 Download PDF

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Publication number
WO2018040800A1
WO2018040800A1 PCT/CN2017/094235 CN2017094235W WO2018040800A1 WO 2018040800 A1 WO2018040800 A1 WO 2018040800A1 CN 2017094235 W CN2017094235 W CN 2017094235W WO 2018040800 A1 WO2018040800 A1 WO 2018040800A1
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WO
WIPO (PCT)
Prior art keywords
veneer
wood
crack
thickness
water
Prior art date
Application number
PCT/CN2017/094235
Other languages
English (en)
French (fr)
Inventor
胡波
胡谦
Original Assignee
安吉博瑞进出口贸易有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 安吉博瑞进出口贸易有限公司 filed Critical 安吉博瑞进出口贸易有限公司
Priority to AU2017317800A priority Critical patent/AU2017317800B2/en
Priority to US16/329,211 priority patent/US20190255731A1/en
Publication of WO2018040800A1 publication Critical patent/WO2018040800A1/zh

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Classifications

    • 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
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • 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
    • B32B21/042—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 wood
    • 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
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
    • 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
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/12—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of solid wood
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • E04F15/045—Layered panels only of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • 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
    • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • 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
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating 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
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/026—Wood 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
    • 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
    • B32B2260/048—Natural or synthetic rubber
    • 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
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • 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
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • 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
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • 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
    • B32B2471/00—Floor coverings
    • 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
    • B32B2607/00—Walls, panels

Definitions

  • the present invention relates to a reconstituted wood board, and more particularly to a reconstituted wood board of log texture and a method of manufacturing the same.
  • Solid wood flooring is made by processing the logs through cutting, sawing, drying, etc.
  • the disadvantage is that the production cycle is long, and it usually takes more than one month to dry.
  • Solid wood composite flooring is a three-layer and above structure formed by composite cutting of a panel obtained by rotary cutting or cutting or sawing with other wood veneers. It requires a lot of veneer blanks for production, and there is sawing loss and The problem is that the amount of glue is large, the amount of formaldehyde released is high, and the bonding strength is unstable.
  • a Chinese invention patent with the authorization number of CN 103448127 B discloses a production method of a veneer laminated board for decoration.
  • the method comprises the following steps: cooking and softening the low-grade logs, then cutting and cutting into wood veneers, and then drying; taking half of the wood veneers, soaking with phenolic resin impregnation solution for 3 ⁇ 10min; 50-80 Drying at a temperature of °C for 1 ⁇ 1.5 hours; separating the un-impregnated wood veneer and the immersed wood veneer into the slab; the slab is placed for 10 ⁇ 30min, and then sent to the pre-press for pre-pressing 3 ⁇ 10min; sent to the hot press for hot pressing; natural cooling, and then saw a certain width of the required width of the slats, that is, the decorative veneer laminated board.
  • the use of thick veneers for the manufacture of veneer lumber is advantageous for both the production process and the cost reduction. Due to the increased thickness of the veneer, such as the production of LVL (Laminated Veneer Lumber), the number of layers of the veneer can be reduced, thereby reducing the amount of glue applied to the veneer and reducing environmental pollution. In addition, the amount of pre-compression, hot pressing, and slabs is greatly reduced, which improves production efficiency.
  • LVL Laminated Veneer Lumber
  • the present invention is to solve the above problems, thereby providing a wood veneer of a wood grain.
  • the sheet is made from a coiled or sliced veneer that is fast drying and has excellent dimensional stability and internal bond strength, as well as high density.
  • the wood grain reconstituted wood board of the present invention is obtained by rotary cutting or cutting to form a veneer having a thickness of 3 to 20 mm, which is obtained by dipping and hot pressing; and the compression ratio of the reconstituted wood board is ⁇ 10%;
  • density is 0.7 ⁇ 1.3g/cm 3, water absorption thickness expansion The rate is ⁇ 3.0%, the internal bonding strength is ⁇ 3.0MP a; the reconstituted wood board is compared with the sawing material board of the same material according to the "Testing Method for Physical and Chemical Properties of GB/T17657-20 13 Artificial Board and Finished Panel" , the density increases by more than 10%, the water absorption thickness expansion rate is reduced by more than 20%, and the internal bonding strength is increased by more than 35%.
  • Another object of the present invention is to provide a method for manufacturing a wood grain-recombined wood board, the technical solution of which is as follows:
  • a method for manufacturing a wood grain reconstituted wood board comprising the steps of:
  • the single board A is subjected to crack repair processing
  • the crack repairing process is specifically: first pressing the veneer A laterally to cause the longitudinal or oblique splitting crack to be closed or mostly closed in the width direction of the veneer A, and most of the repairing longitudinal cracks and oblique
  • the longitudinal portion of the crack the thickness of the crack of the veneer A in the vertical direction of the veneer A in the vertical direction Eliminate in the direction, repair the transverse part of the transverse crack and the oblique crack, and repair the longitudinal part of the longitudinal crack and the oblique crack, and continue the hot pressing to reduce the thickness of the single board A, increase the density of the single board A, and then maintain the pressure.
  • the adhesive immersed in the interior of the veneer A is completely cured to obtain a reconstituted wood veneer of stable log texture.
  • the veneer A having a crack injury means that a crack appears on the veneer, and the crack is relatively deeper and may be referred to as a crack.
  • This type of crack can be caused by the squeezing of the tool or the tearing of the log during the cutting or cutting of the original wood. It can also be that the log has been dried due to water loss before the cutting or cutting.
  • These cracks may be transverse cracks, longitudinal cracks or oblique cracks. Usually, the loss of water and dryness of the logs will produce radial radiation and axially extending cracks on the logs, making the logs extremely easy to be split by the tool such as an axe; this crack is after the logs are cut into plates.
  • transverse cracks or oblique cracks are mostly transverse cracks or oblique cracks, and of course some longitudinal cracks. Regardless of the transverse crack, longitudinal crack or oblique crack, it is nearly parallel to the direction of the veneer fiber. Among them, the transverse crack is also called layer cracking, which can be seen in the thickness direction of the veneer; the longitudinal crack can be reflected in the width direction of the veneer; and the oblique crack is reflected in the thickness and width direction of the veneer.
  • the front and back sides of the veneer are also likely to have a large number of distinct concavities and convexities, which are caused by the tear.
  • This embossing exhibits a distinct linearity, the principle of which is equivalent to the axe chopping wood, the tear marks formed by the chopped firewood on the cleft surface.
  • This tear marks cause the surface of the firewood to show significant surface unevenness. That is to say, when the thick veneer is cut from the wood body, some of the material is actually torn off, so that a small portion of the thicker or sliced veneer is disintegrated and has more cracks. , and the surface is severely uneven, and there is a phenomenon of stratification.
  • the crack repairing technique of the single board A is the core of the present invention. Since the rotary cutting is a fixed rotation of the wood segment, the rotary blade is fed in parallel with the axis of the wood segment, and the cutting process is performed along the direction of the wood annual ring. Therefore, the veneer A obtained by the rotary cutting process is equivalent to a plate in which the multilayer fiber bundles are formed side by side, and the direction of the fiber bundle is the length direction of the veneer A. Therefore, the crack or crack is the separation between the fiber bundles, and the adjacent fiber bundles are torn in the spiral cutting, not because the fiber bundle is broken or broken. Therefore, the strength of the veneer A is not lost after the crack is repaired, and since the fiber bundles are glued and pressed more tightly, the strength is remarkably improved.
  • the sliced veneer is also a plate in which the multilayer fiber bundles are formed side by side, and the direction of the fiber bundle is the length direction of the veneer A; after the crack is repaired, the strength thereof is also remarkably improved.
  • step a using a rotary cutting or cutting to obtain a cracked sheet A with a thickness of 3 to 20 mm; the drying process of step b is to control the moisture content of the single sheet A In 7 to 15%; in step c, the glue is one of a mixed liquid of a water-soluble phenolic resin glue, a water-soluble urea-formaldehyde resin glue, a polyurethane glue, a water-soluble phenolic resin glue, and a nitrile rubber emulsion.
  • step b using a continuous conveyor dryer for rapid drying, drying temperature of 75 ⁇ 120 ° C, drying between 60 ⁇ 300min, the moisture content of the veneer A is controlled to 7 ⁇ 15.
  • the conventional sawing process is used to obtain a plate having a thickness of 15 mm or more.
  • it is usually necessary to perform multiple cycles of wet-drying-wetting-drying in the drying process.
  • the energy consumption is increased, the cost is increased, and the dry day is prolonged; and the process of the present invention can be quickly dried after being cut or sliced into a veneer, even if the warpage and cracking occur. The subsequent crack repair process was corrected.
  • the ratio of the water-soluble phenolic resin and the nitrile rubber emulsion is controlled according to the principle that the wood-based bonding strength and the flexible elasticity are supplemented.
  • the water-soluble phenolic resin acts as a blocking after curing, which embodies the bonding strength of the sheet; the nitrile rubber emulsion imparts elasticity and flexibility to the veneer A. That is, by water-soluble phenolic resin and The compounding of the nitrile rubber emulsion imparts toughness and strength to the veneer A. Specifically, how much needs to be toughened and how much needs to be enhanced can be deployed according to the actual needs of users.
  • the nitrile rubber emulsion accounts for more than 5% by weight of the water-soluble phenolic resin, and the veneer A can Reflects good flexibility and flexibility. Therefore, in the present invention, the ratio of the water-soluble phenol resin and the nitrile rubber emulsion is not specifically limited.
  • the glue is a water-soluble phenolic resin or a mixed liquid of a water-soluble phenolic resin and a nitrile rubber emulsion
  • the dipping is controlled by a pressure dipping method, and the dipping pressure is controlled to 0.3. ⁇ 1.0MPa
  • Steps c and d further include a secondary drying step, specifically: drying the dipped board A at a temperature of 60 to 90 ° C to a moisture content of 6 to 12%;
  • the temperature of the plate surface of the press is 125 to 140 ° C, and the vertical pressure acting on the plate is at least 15 kg/cm 2 .
  • step c the glue is a water-soluble urea-formaldehyde resin; and a second drying step is further included between the steps c and d, specifically: the dipped board A is dried at a low temperature below 50 ° C to a moisture content of 20% or less; Step d, the secondary dried sheet A and the crucible are sent to a press for crack repair treatment and curing, and the curing temperature is 90-115 ° C .
  • the glue is a polyurethane
  • the pretreatment of the veneer A is performed in advance, and the pretreatment comprises the following steps: (1), immersing the veneer A in alkaline water; (2), rinsing after cooking, using a vacuum suction method to dredge the tube hole of the veneer A; (3) drying the veneer A to a moisture content of 10% or less (4), pressurizing the polyurethane glue into the inside of the veneer A by pressure impregnation method; (5) After the plate is fixed by the mold width-fixing method and the mold-thickness method, the plate is solidified at a normal temperature state, and the plate is taken out.
  • the longitudinal portion of the longitudinal crack and the oblique crack is repaired by the mold width-fixing method; and in the lateral portion of the transverse crack and the oblique crack, the mold-thickness method is employed.
  • the density of different parts of the same log is different, so even the veneers obtained by cutting the same log have different densities.
  • the nuances of density can also vary the width of the final sheet product. For example, 20 cm wide eucalyptus log veneer, after drying, dipping and hot pressing, because the hot pressing contains lateral pressure, its width will inevitably decrease, especially when the density is inconsistent, its width may be It will shrink to 19 cm, and it may shrink to 19.8 cm. To ensure uniform product size, you need to adjust the width of the board.
  • the traditional solution is to cut the boards of different widths into the same width. However, this not only increases the number of processes, but also wastes materials and produces waste materials.
  • the mold width-fixing method that is, adding a certain wide strut between the frames of the mold, the fixed-width strut is retractable, has a controllable minimum compression length, and the two ends are connected to the frame of the mold.
  • the veneer is placed in the mold, and the width of the veneer is adjusted by one-way side pressurization or bidirectional side pressurization.
  • the width of the veneer is no longer compressed by the fixed width of the mold; the width of the compressed plate produced by this method is the same as the minimum compression length of the fixed width of the mold, so it is called the mold width method.
  • the mold thicknessing method that is, using a mold having a frame thickness smaller than the thickness of the single plate, the veneer is placed therein, and when the press plate of the press presses the veneer, the veneer is compressed; when the veneer is compressed to
  • the thickness of the frame is the same as the thickness of the frame of the mold.
  • the pressure of the plate is offset by the frame of the fixed thickness.
  • the veneer is no longer compressed.
  • the thickness of the plate produced by this method is the same as the thickness of the frame of the mold, so it is called the mold thickness method.
  • the width of the veneer is first adjusted by the mold width-fixing method, and at least the longitudinal portion of the longitudinal crack and the partial oblique crack are repaired at the same time, and the straightness of the veneer is also adjusted.
  • the thickness of the veneer is then compressed by the mold thickness method, and the crack repair and density increase are mainly completed in this process.
  • the above process of repairing cracks is carried out during the curing or curing of the adhesive; To ensure the quality of the final product, it is necessary to maintain a period of time until the adhesive is cured.
  • the press plate in the side pressing, is first closed to the thickness of the veneer to fix the veneer, and then the mold is set to be wide and then pressed into place.
  • step d one or more veneers A are placed in a mold frame, and a press is used to compress one side or two-way side pressure to compress one piece or A plurality of veneers A compress the width of the veneer A to the width of the mold frame; and then perform a constant thickness and pressure by a hot press to reduce the thickness of the veneer A to the thickness of the fixed thickness die frame.
  • the vertical and vertical thickening pressure is mainly to make the fiber bundles of different thickness layers more compact, so that the veneer A increases the density, and the same can also cause the fiber bundles to be squeezed and repair the crack;
  • the tension between the fiber bundles which are mainly in the same layer becomes tighter, mainly to cause extrusion between the fiber bundles, repairing the longitudinal cracks, and also adjusting the width and straightness of the veneer A.
  • the prior art reconstituted wood board is obtained by rolling or disintegrating the wood into a thin veneer and then sizing and then randomly stacking the parison by high-pressure high-temperature compression molding, the original texture of the wood is The invention is damaged to some extent; but the invention does not break up the fiber of the plate by rotary cutting or cutting, nor does it randomly fold the veneer into the mold for pressing, but the tape produced by the cutting or cutting.
  • the crack-injured veneer is compressed by dipping to repair its cracks; therefore, its wood grain is kept very well, retaining natural wood grain, and increasing density and performance is more stable. The utilization rate of wood has been greatly improved.
  • the invention creatively proposes that a thick veneer with a crack injury is first obtained by a rotary cutting or cutting process, and then a process of repairing a cracked plate by dipping compression to obtain a plate;
  • the plate also has the advantages of short drying time, high production efficiency, low energy consumption, energy saving and environmental protection; Arbitrarily increase the product format, which is not possible with conventional sawn timber;
  • the present invention is used in a dipped mortar, and the glue used may be a water-soluble phenolic resin or a mixture of a water-soluble phenolic resin and a nitrile rubber emulsion; the water-soluble phenolic resin provides strength after curing, and the nitrile rubber emulsion is cured to provide Resilience, so the final product of the invention has good strength and toughness, and significantly improves the quality of the product; [0042] 3, because the rotary cutting is a fixed rotation of the wood segment, the rotary blade is parallel to the axis of the wood segment for linear feeding motion, cutting the cutting process along the wood annual ring direction; therefore, the single plate A obtained by the rotary cutting process, It is equivalent to a plate in which a plurality of fiber bundles are formed side by side; therefore, cracks or cracks are separations between the fiber bundles, and adjacent fiber bundles are torn in the rotary cutting, not because the fiber bundles are broken or broken. Therefore, after the crack is
  • the invention not only repairs the crack, but also improves the hardness and density of the sheet; finally, the density of the sheet can be increased by more than 10%.
  • FIG. 1 is a schematic view showing a crack of a sheet of a single sheet A of the present invention.
  • the wood grain reconstituted wood board is obtained by the following method:
  • the veneer is placed in a dryer at 75 ° C, control the moisture content of 11% taken out;
  • the size of the veneer board is basically maintained at a length of 2000mm, and the width has a different shrinkage, 134-136mm, thickness There are also variations ranging from 1 5.2-mm to 15.4mm;
  • the veneer is placed in a container pre-filled with compatible water and two other solutions, the two dissolved
  • the liquids were respectively 30% solids water-soluble phenolic resin, 45% solid content nitrile rubber emulsion, and the nitrile rubber solution content was 7% of the water-soluble phenolic resin.
  • the inspection veneer sees that the mixed liquid has been permeated, and the excess liquid is filtered out;
  • the veneer is sent back to the drying kiln at 70 ° C to dry to a moisture content of 10% taken out, this time check the length of the veneer did not see a significant change, 2000mm, the width because the different parts of the wood Density is not the same, the display has an error, about 132-136mm; the thickness is also the same error is about 15.0-15.3mm
  • the veneer is placed in a mold of 13.4 mm thick and 130 mm wide in a hot press; the press is a 4-layer hot press, and four veneers are placed on each layer, a total of 16 veneers;
  • hot plate surface temperature is 133-135 ° C;
  • the hot-pressed steel plate is closed to the veneer, and then the mold is set to a width of 1 30 mm for side pressure, and then vertically pressed up and down to the veneer.
  • the thickness is 14mm.
  • the pressure-preserving heat-insulation is completed in 18 minutes; in this process, the longitudinal crack 1, the transverse crack 2 and the oblique crack 3 as shown in Fig. 1 are repaired;
  • a complete oak hard veneer is obtained, which has a length of 2000 mm, a uniform width of 130 mm, and a uniform thickness of 13 mm.
  • the wood grain reconstituted wood board is obtained by the following method:
  • the veneer is placed in a dryer at 75 ° C, control the moisture content of 10 to 11% taken out;
  • the size of the veneer board is basically maintained at a length of 2000 mm, and the width has a different shrinkage rate, 238-242 mm, The thickness also varies from 5.8 mm to 6.2 mm;
  • the veneer is placed into a pressure pre-loaded with 25% solids water-soluble phenolic resin adhesive In the force container, closing the container door;
  • the veneer is sent back to the dryer at 75 ° C to dry to a moisture content of 10% and then taken out, this ⁇ check the length of the veneer did not change significantly, the width because the original density of different parts of the wood is not Similarly, the display has an error, approximately in the range of 237-240mm; the thickness is also the same with an error of approximately 5.6-6.0mm;
  • the veneer is placed in a fixed thickness 5.0mm fixed width 235mm mold in the hot press, the press is a 4-layer hot press, each layer is placed 4 veneers, a total of 16 veneers;
  • the surface temperature of the hot press machine is 134-137 ° C;
  • the hot-pressed steel plate is closed to the thickness of the veneer fixed to the veneer, and then the mold is set to a width of 235 mm, and then pressed vertically in the vertical direction.
  • the thickness of the mold is 5.0mm; the pressure is kept for 12 minutes, and the plate is released; in this process, the longitudinal crack 1, the transverse crack 2 and the oblique crack 3 as shown in Fig. 1 are repaired;
  • the wood grain reconstituted wood board is obtained by the following method:
  • the veneer is placed in a dryer at 75 ° C, control the moisture content of 10% taken out; the length of the veneer veneer 2000m m no significant change, and the width has a different shrinkage, ranging from 553-580mm The thickness also varies from 5.7 mm to 6.0 mm;
  • the veneer is returned to the dryer at 45 ° C to dry to a moisture content of 17% to take out, this ⁇ check the length of the veneer did not change significantly, the width because the original density of different parts of the wood is not the same , display error, large About 553-575mm; the same thickness has an error of about 5.6-5.8mm;
  • the veneer is placed in a mold of a thickness of 5.0 mm and a width of 550 mm in a hot press; the press is a 4-layer hot press, and two veneers are placed on each layer, and the middle interval is the same width as the wood.
  • High temperature resistant film a total of 8 veneers;
  • hot press plate surface temperature is 96-100 ° C;
  • the hot-pressed steel plate is closed to the thickness-fixed veneer of the veneer, and then the mold is set to a width of 550 mm and pressed into place, and then vertically pressed up and down.
  • the thickness of the mold is 5.0 mm; the pressure is kept for 10 minutes; in this process, the longitudinal crack 1, the transverse crack 2 and the oblique crack 3 as shown in Fig. 1 are repaired;
  • the wood grain reconstituted wood board is obtained by the following method:
  • the poplar logs produced in Shandong are cut into wood sections of 1000 mm length, and then cooked and softened, and a poplar veneer having a length of 1000 mm, a width of 600 mm, and a thickness of 6.2 mm is obtained by rotary cutting;
  • the veneer is immersed in an alkaline aqueous solution at 80 ° C for 3 hours, and then replaced with 90-95 ° C water for 2 hours, and sent to a sealed tank for evacuation, in order to dredge the wood
  • the fiber tube hole is favorable for dipping; then the veneer is placed in a dryer at 75 ° C to control the moisture content to 6%; the length of the veneer plate is 1000 mm, and the width is different, 530-550 mm
  • the thickness varies from 5.5 to 5.7mm.
  • the veneer is placed in a pressure vessel, immediately injected into the polyurethane liquid, closing the container door;
  • the screw piston of the principle of the medical hand push syringe pushes the polyurethane liquid in the tank, so that the adhesive completely floods the wood board, and the upper valve is closed after the air is removed; the screw continues to push the piston until the pressure gauge shows l.OMPa ⁇ Prevent the pressure for 60 minutes; then retract the threaded ejector lever and open the topping valve to allow air to enter. At normal pressure, the door is removed and the board is removed to remove excess liquid.
  • the veneer is placed in a 10 laminator coated with a release agent, a mold having a thickness of 5.3 mm and a width of 525 mm; two veneers per layer, a total of 20 veneers;
  • the maximum difference between the use of the polyurethane resin in the third embodiment and the water-soluble phenolic resin and the water-soluble urea-formaldehyde resin of the first embodiment and the second embodiment is that the press does not need to be heated, and the final product volume loss is reduced. , the available material volume increases.
  • the polyurethane injected into the interior of the wood has a good filling effect and increases the density of the wood. Although the compression ratio is not 10%, the compactness of the wood increases and the mechanical properties are improved.
  • the wood grain reconstituted wood board is obtained by the following method:
  • the veneer is placed in a dryer at 75 ° C, control the moisture content of 11% taken out; the size of the veneer is basically maintained at a length of 2000mm, and the width has a different shrinkage, 134-136mm, thickness There are also variations ranging from 1 5.2-mm to 15.4mm;
  • the veneer is placed in a container pre-filled with compatible water and two other solutions, the two solutions are 30% solids water-soluble phenolic resin, 45% solid content nitrile rubber The emulsion, wherein the content of the nitrile rubber solution is 7% of the water-soluble phenolic resin. Close the container door, input compressed air, the pressure gauge shows 0.6MPa and hold for 120 minutes, then vent and remove the board.
  • the veneer is sent back to the drying kiln at 70 ° C to dry to a moisture content of 10% to take out, this time check the length of the veneer did not see a significant change, 2000mm, the width because the different parts of the wood Density is not the same, the display has an error, about 132-136mm; the thickness is also the same error is about 15.0-15.3mm
  • the veneer is placed in a fixed thickness of the hot press machine 13.4 mm, a mold width of 130 mm; the press is a 4-layer hot press, each layer placed 4 veneers, a total of 16 veneers;
  • hot plate surface temperature is 133-135 ° C;
  • h after the veneer is placed in the mold, firstly, the hot-pressed steel plate is closed to the veneer, and then the mold is set to a width of 1 30 mm for side pressure, and then vertically pressed up and down to the veneer. The thickness is 14mm. The pressure holding and heat preservation is completed after 18 minutes; in this process, the longitudinal crack 1, the transverse crack 2 and the oblique crack 3 as shown in Fig. 1 are repaired;
  • a complete oak hard veneer is obtained, which has a length of 2000 mm, a width of 130 mm, and a uniform thickness of 13 mm.
  • the wood grain reconstituted wood board produced by the invention and the sawn wood board of the same tree species are processed into a sheet of uniform thickness and processed to a moisture content of 9 to 10%, according to the standard "GB/T17657-2013 artificial Test method for physical and chemical properties of panels and veneered panels and "LYT 1984-2011 Recombinant Wood Flooring"
  • the manufacturing method of the invention fully utilizes fast-growing wood, saves energy, is environmentally friendly, has a wide range of products, and has great promotion significance.

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Abstract

一种原木纹理的重组木板材，由原木旋切或者刨切制成厚度为3～20mm的单板后经浸胶和热压处理制得；其压缩比≥10%、密度为0.7～1.3g/cm 3、吸水厚度膨胀率≤3.0%、内胶合强度≥3.0MPa。其制造方法包括：先用旋切或刨切工序制取带有裂纹伤的厚单板，再通过浸胶压缩修复裂纹板。制得的板材韧度好、强度高、尺寸稳定性好、锯路损耗少，干燥所需时间短以及节能环保。

Description

原木纹理的重组木板材及其制造方法 技术领域
[0001] 本发明涉及一种重组木板材， 尤其涉及一种原木纹理的重组木板材及其制造方 法。
背景技术
[0002] 实木地板是将原木经截断、 锯板、 干燥等工序处理制成的， 缺点是生产周期较 长， 通常干燥就需要一个月以上的吋间。 实木复合地板是将旋切或刨切或锯切 得到的面板与其它木材单板一起复合组坯形成的三层及以上结构的板材， 生产 吋需要很多张单板组坯， 存在锯路损耗和用胶量大、 甲醛释放量高、 胶合强度 不稳定等问题。
[0003] 如授权公告号为 CN 103448127 B的中国发明专利， 公幵了一种装饰用单板层积 板材的生产方法。 该方法包括以下工艺步骤： 对低等级原木进行蒸煮软化处理 ， 然后旋切、 裁剪成木材单板， 再干燥； 取一半木材单板， 用酚醛树脂浸渍液 进行浸泡处理 3〜10min; 50-80°C温度下干燥 1〜1.5小吋； 将未浸渍处理的木材 单板和浸渍处理后的木材单板进行间隔顺纹组坯； 板坯陈放 10〜30min， 再送入 预压机预压 3〜10min; 送入热压机进行热压； 自然冷却， 再锯制一定厚度要求 的等宽板条， 即得到装饰用单板层积板材。
[0004] 采用厚单板制造单板层积材， 对于生产工艺和降低成本都是有利的。 由于单板 厚度的加大， 如生产同样厚度的 LVL (Laminated Veneer Lumber) ， 则可减少单 板的层数， 从而减少了单板的涂胶量， 减少了环境污染。 另外， 预压、 热压、 组坯等的吋间也大大减少， 提高了生产效率。
[0005] 但是， 现有技术中关于厚单板旋切的研究很少， 因为旋切单板越厚， 单板越容 易产生板材裂纹。 板材裂纹可以是较为明显的裂缝， 有横向的， 有纵向的， 也 有斜向的， 板材裂纹也可以是不太明显的隐性的裂纹伤。 隐性的裂纹伤在将单 板沿宽度方向弯曲吋能被发现。 旋切制造的单板越厚， 刀具与木材之间的挤压 力就越大， 有一种类似揉搓的破坏力。 另外， 厚的单板从木材本体上剥离下来 吋， 有部分材料实际上是被撕裂下来的， 这样较厚的旋切单板有一小部分会被 疏解， 并有较多的裂纹， 且表面严重凹凸不平， 并且有上下分层的现象， 一般 不能直接用于表面装饰， 影响产品的使用价值。 如采用桉树原木， 旋切一张 10m m厚的单板， 不产生裂纹几乎是不可能的。
技术问题
[0006] 本发明要解决上述问题， 从而提供一种原木纹理的重组木板材。 该板材以旋切 或刨切的厚单板为原料、 可快速干燥， 并且具有优良的尺寸稳定性和内胶合强 度， 以及较高的密度。
问题的解决方案
技术解决方案
[0007] 本发明解决上述问题的技术方案如下：
[0008] 本发明原木纹理的重组木板材， 其由原木旋切或者刨切制成厚度为 3〜20mm的 单板后经浸胶和热压处理制得； 所述重组木板材的压缩比≥10%； 依据 《GB/T 17657-2013人造板及饰面人造板理化性能试验方法》 和 《LYT 1984-2011重组木 地板》 标准进行检测， 密度为 0.7〜1.3g/cm 3、 吸水厚度膨胀率≤3.0%、 内胶合强 度≥3.0MPa; 所述重组木板材相比相同材质的锯切材木板， 依据 《GB/T17657-20 13人造板及饰面人造板理化性能试验方法》 进行检测， 密度增加 10%以上、 吸 水厚度膨胀率降低 20%以上、 内胶合强度增加 35%以上。
[0009] [0008]本发明的另一个目的是提供一种原木纹理的重组木板材的制造方法， 其 技术方案如下：
[0010] 原木纹理的重组木板材的制造方法， 包括以下步骤：
[0011] a、 原木通过旋切或者刨切制得厚度为 3〜20mm且具有裂纹伤的单板 A;
[0012] b、 对单板 A进行干燥处理；
[0013] c、 对单板 A进行浸胶处理；
[0014] d、 单板 A进行裂纹修复处理；
[0015] 所述裂纹修复处理具体为： 先对单板 A侧向加压使纵向或者斜向幵裂的裂纹在 单板 A的宽度方向上闭合或者大部分闭合， 大部分修复纵裂纹和斜裂纹的纵向部 分； 再对单板 A在垂直上下方向热压使横向或者斜向幵裂的裂纹在单板 A的厚度 方向上消除， 修复横裂纹和斜裂纹的横向部分， 同吋补充修复纵裂纹和斜裂纹 的纵向部分， 并且继续热压使单板 A的厚度降低， 单板 A的密度提高， 再保温保 压使浸入单板 A内部的胶黏剂完全固化， 得到品质稳定的原木纹理的重组木板材
[0016] 本发明上述技术方案中， 具有裂纹伤的单板 A， 是指单板上呈现出裂纹， 裂纹 程度较深较明显者可称为裂缝。 这种裂纹可以是在旋切或者刨切原木制取厚单 板吋因刀具的挤压或者因原木撕裂而产生的， 也可以是原木在旋切或者刨切前 就已经因为失水而干缩形成的。 这些裂纹可以是横裂纹、 纵裂纹或者是斜裂纹 。 通常原木失水干燥会在原木段上产生径向放射的并向轴向延伸的裂纹， 使得 原木极易被斧子之类的工具顺着该裂纹劈裂； 这种裂纹在原木旋切成板后， 多 半会成为纵裂纹或者斜裂纹。 而因旋切或者刨切原因产生的裂纹， 多半为横裂 纹或者斜裂纹， 当然也有部分纵裂纹。 不管横裂纹、 纵裂纹还是斜裂纹， 都与 单板纤维方向近乎平行。 其中， 横裂纹也叫层裂， 可以在单板的厚度方向上体 现出来； 纵裂纹可以在单板的宽度方向上体现出来； 而斜裂纹在单板的厚度和 宽度方向均有所体现。
[0017] 裂纹产生的原因多种多样， 除了旋切或者刨切吋的本因外， 还与树种、 工艺、 原木干燥程度等因素有关， 此外还与厚度控制密切相关。 当树种、 旋切工艺、 原木干燥程度等因素相对恒定的情况下， 单板厚度越大， 越容易产生明显的、 不明显的或隐形的板材裂纹。 所以， 旋切或者刨切的厚单板， 因为裂纹的原因 ， 不用于装饰板的面板材料使用。
[0018] 厚单板除了裂纹伤外， 单板的正反两面还极有可能具有大量的明显的凹凸， 这 种凹凸是因为撕裂产生的。 这种凹凸呈现明显的线性， 其原理相当于斧子劈柴 吋， 被斧子劈裂的木柴在其劈裂面上形成的撕裂痕。 这种撕裂痕使木柴的劈裂 面呈现出明显的表面不平。 也就是说， 厚的单板从木材本体上切下来吋， 有部 分材料实际是被撕下来的， 这样较厚的旋切或者刨切单板有一小部分会被疏解 ， 并有较多的裂纹， 且表面严重凹凸不平， 并且有上下分层的现象。
[0019] 但这种带裂纹伤的板材， 不管是撕裂伤、 挤压伤还是自然幵裂伤， 也不管是原 木幵裂带入的， 还是出自刀具、 原木软化程度、 板材厚度控制等原因， 在本发 明的上述技术方案中， 已经不重要了。 因为这种厚单板不管是隐性的、 不明显 的或明显幵裂的撕裂伤， 还是表面因撕裂造成的明显凹凸不平， 在经过本发明 后续的浸胶和热压处理后， 裂纹伤都会得到修复， 表面的凹凸不平也都会变得 平整。
[0020] 单板 A的裂纹修复技术， 是本发明的核心所在。 由于旋切是木段作定轴回转， 旋到刀刃平行于木段轴线作直线进给运动， 切削沿木材年轮方向进行的切削过 程。 因此旋切工艺制得的单板 A， 其相当于是多层纤维束并排形成的一张板， 纤 维束的方向即单板 A的长度方向。 因此， 裂纹或者裂缝是纤维束之间产生的分离 ， 是在旋切中相邻的纤维束被撕裂， 并非是因为纤维束的断裂或者破损。 因此 ， 在裂纹修复后， 单板 A的强度不会损失， 并且因为纤维束之间被胶合、 被挤压 地更为紧密， 因此强度反而会显著提高。
[0021] 同样的， 刨切单板也是多层纤维束并排形成的一张板， 纤维束的方向即单板 A 的长度方向； 在裂纹被修复后， 其强度也会得到显著的提高。
[0022] 作为上述技术方案的优选， 步骤 a中， 采用旋切或者刨切制得厚度为 3〜20mm 的带裂纹伤的单板 A; 步骤 b的干燥处理是将单板 A的含水率控制在 7〜15%； 步 骤 c中， 所述胶为水溶性酚醛树脂胶水、 水溶性脲醛树脂胶水、 聚氨酯胶水、 水 溶性酚醛树脂胶水和丁腈橡胶乳液的混合液体中的一种。
[0023] 作为上述技术方案的优选， 步骤 b中， 采用连续式输送干燥机进行快速干燥处 理， 干燥温度 75〜120°C， 干燥吋间 60〜300min， 将单板 A的含水率控制到 7〜15 。
[0024] 用传统锯切工艺制取 15mm以上厚度的板材， 干燥吋为了避免板材翘曲、 幵裂 ， 通常需要在干燥过程中进行打湿-烘干-打湿-烘干的多次循环处理， 这样就增 加了能源消耗， 增加了成本和延长干燥的吋间； 而采用本发明的工艺， 在旋切 或者刨切成单板后可以进行快速干燥， 即便干燥发生翘曲和幵裂也可在后续的 裂纹修复工序得到修正。
[0025] 水溶性酚醛树脂和丁腈橡胶乳液的比例是依据制得木板胶合强度为主、 柔性弹 性为辅的原则来控制的。 水溶性酚醛树脂固化后起粘连作用， 体现板材的胶合 强度； 丁腈橡胶乳液赋予单板 A弹性和柔性。 也就是说， 通过水溶性酚醛树脂和 丁腈橡胶乳液的混配， 同吋赋予单板 A韧性和强度。 而具体的， 需要增韧多少、 需要增强多少， 就可以根据用户的实际需要来调配了。 试验显示， 使用 25%固体 含量的水溶性酚醛树脂和 45%固体含量的丁腈橡胶乳液配制的混合液体中， 丁腈 橡胶乳液占水溶性酚醛树脂重量的 5%以上吋， 单板 A就能体现出良好的柔性和 弹性。 所以， 本发明中， 并没有对水溶性酚醛树脂和丁腈橡胶乳液的比例做出 具体的限定。
[0026] 作为一种优选， 水溶性酚醛树脂和丁腈橡胶乳液的混合液体中， 其中水溶性酚 醛树脂的固体含量为 20〜45%吋， 丁腈橡胶乳液占水溶性酚醛树脂质量的 5-15%
[0027] 更优选的， 水溶性酚醛树脂和丁腈橡胶乳液的混合液体中， 其中水溶性酚醛树 脂的固体含量为 25〜30%吋， 丁腈橡胶乳液占水溶性酚醛树脂质量的 5〜10%。
[0028] 作为上述技术方案的优选， 步骤 c中， 所述胶为水溶性酚醛树脂或者水溶性酚 醛树脂与丁腈橡胶乳液的混合液体， 浸胶采用加压浸渍法， 浸胶压力控制为 0.3 〜1.0MPa; 步骤 c与 d之间还包含有二次干燥步骤， 具体为： 将浸胶后的单板 A在 60〜90°C的温度下烘干至含水率 6〜12%； 步骤 d中， 热压吋， 控制压机板面温度 为 125〜140°C， 作用于板材的上下垂直压力至少为 15kg/cm 2。
[0029] 作为上述技术方案的另一种优选， 步骤 c中， 所述胶为水溶性脲醛树脂； 步骤 c 与 d之间还包含有二次干燥步骤， 具体为： 将浸胶后的单板 A在 50°C以下的低温 烘干到含水率 20%以下； 步骤 d， 将二次烘干的单板 A及吋送入压机行裂纹修复 处理并固化， 固化温度为 90~115°C。
[0030] 作为上述技术方案的再一种优选， 步骤 c中， 所述胶为聚氨酯； 在单板 A进行聚 氨酯浸胶前， 预先进行单板 A的预处理， 所述预处理包括以下步骤： （1) 、 将 单板 A在碱水中浸渍； （2) 、 蒸煮后冲洗， 采用负压吸出法疏通单板 A的管孔； (3) 、 将单板 A烘干到含水率 10%以下； （4) 、 采用加压浸渍法把聚氨酯胶压 入到单板 A内部； （5) 采用模具定宽法和模具定厚法压板之后， 在常温状态下 固化， 取出板材。
[0031] 在采用聚氨酯做胶粘剂吋， 会出现聚氨酯难以进入单板内的问题。 在注入聚氨 酯的同吋， 聚氨酯也在发生着固化， 一幵始聚氨酯注入还比较顺利， 但后期就 会出现聚氨酯难以进入单板内的情况。 在解决这个问题吋， 单纯地提高压力和 延长加压浸渍吋间等这些手段显得笨拙。 对此， 本发明人提出了疏通木材管孔 的方案以提高浸胶效果。 在碱水中浸渍足够的吋间后， 一些纤维素和半纤维素 发生软化、 一些侵填体与碱发生反应， 再行蒸煮和冲洗后， 木材的管孔被疏通 ， 这有利于浸胶方案的实施。 而事实也证明这样的方案是合理的有效果的。
[0032] 作为上述技术方案的优选， 步骤 d中， 在修复纵裂纹和斜裂纹的纵向部分吋， 采用模具定宽法； 在修复横裂纹和斜裂纹的横向部分吋， 采用模具定厚法。
[0033] 同一原木不同部位的密度有差异， 因此即使是由同一原木旋切而得到的单板， 其密度也不尽相同。 密度的细微差异亦可使最终板材产品的宽度有所不同。 如 2 0cm宽的桉树原木单板， 在经过干燥、 浸胶和热压处理后， 由于热压包含了侧向 加压， 其宽度必然会有所降低， 尤其是在密度不一致吋， 其宽度可能会缩小到 1 9cm, 也有可能缩小到 19.8cm。 为了保证产品的尺寸统一， 需要对单板进行定宽 处理。 传统的方案是将不同宽度的单板统一裁切到相同的宽度。 但这样做不仅 增加了工序， 也浪费了材料， 又产生了废弃料。 对于这个问题， 我们采用了模 具定宽法， 即在模具的边框间增设一定宽支杆， 定宽支杆可伸缩， 具有可控的 最小压缩长度， 两端连接在模具的边框上。 将单板置于模具内， 通过单向侧面 加压或者双向侧面加压的方式， 调整单板的宽度， 当单板被压缩到与可伸缩的 定宽支杆的最小压缩长度一致的吋候， 被模具的定宽支杆抵消， 单板的宽度不 再被压缩； 此法制得的压缩板材宽度与模具的定宽支杆的最小压缩长度相同， 因此被称为模具定宽法。
[0034] 模具定厚法， 即采用边框厚度小于单板厚度的模具， 将单板置于其内， 当压机 的压板对单板施压吋， 单板被压缩； 当单板被压缩到与模具的边框厚度相同吋 ， 压板的压力被固定厚度的模具边框抵消， 单板不再被压缩； 此法制得的压缩 板材厚度与模具的边框厚度相同， 因此被称为模具定厚法。
[0035] 上述技术方案中， 先采用模具定宽法调整单板的宽度， 同吋至少修复了大部分 的纵裂纹和部分斜裂纹的纵向部分， 也同吋调整了单板的直线度。 再采用模具 定厚法压缩单板的厚度， 裂纹的修复和密度的提高都主要在这个过程中完成。 当然上述修复裂纹的过程是在胶粘剂幵始固化或者固化过程中进行的； 并且为 了保证最终产品的质量， 还得保压一段吋间， 直至胶黏剂固化完成。
[0036] 作为上述技术方案的优选， 在进行侧压吋， 先将压机钢板闭合到紧贴单板的厚 度固定单板， 然后将模具定宽再侧压到位。
[0037] 作为上述技术方案的优选， 步骤 d中， 将一张或多张单板 A置放在模具框内， 采 用压机进行双向侧面加压或者单向侧面加压的方式压缩一张或多张单板 A， 将单 板 A的宽度压缩到模具框的宽度； 再通过热压机进行定厚重压， 将单板 A的厚度 降低到定厚模具框的厚度。
[0038] 垂直上下方向的定厚重压， 主要是使不同厚度层的纤维束变得更为紧密， 使单 板 A增加密度， 同吋也能使纤维束之间产生挤压， 修复裂纹； 侧向加压主要是同 层的纤维束之间变得更为紧密， 主要是使纤维束之间产生挤压， 修复纵裂纹， 同吋也能调整单板 A的宽度和直线度。
[0039] 由于现有技术的重组木板材是把木材碾压疏解或者旋切成较薄的单板后施胶再 随意堆积组坯经过高压高温压缩成型的， 因此， 其木材原有的纹理在一定程度 上遭受破坏； 而本发明通过旋切或者刨切制板， 并没有将板材纤维打散， 也不 是将单板随机折叠装入模具压制成型， 而是将旋切或者刨切中产生的带裂纹伤 的单板通过浸胶压缩， 修复其裂纹； 因此， 其木纹保持得很好， 保留了天然木 纹， 并且增加密度， 性能更加稳定。 木材的利用率大大提升。
发明的有益效果
有益效果
[0040] 1、 本发明创造性地提出， 先用旋切或刨切工序制取带有裂纹伤的厚单板， 再 通过浸胶压缩修复裂纹板的工艺来制取板材； 该方案制得的板材除了具有韧度 好、 强度高、 尺寸稳定性好、 锯路损耗小等优点之外， 还具有干燥所需吋间特 别短、 生产效率高、 能耗低、 节能环保的优点； 而且还可以任意增大产品幅面 ， 这是传统锯材不能做到的；
[0041] 2、 本发明在浸胶吋， 采用的胶可以是水溶性酚醛树脂或者水溶性酚醛树脂和 丁腈橡胶乳液的混合物； 水溶性酚醛树脂固化后提供强度， 丁腈橡胶乳液固化 后提供韧性， 因此本发明最终制得的产品具有良好的强度和韧性， 显著提高产 品的质量； [0042] 3、 由于旋切是木段作定轴回转， 旋到刀刃平行于木段轴线作直线进给运动， 切削沿木材年轮方向进行的切削过程； 因此旋切工艺制得的单板 A， 其相当于是 多层纤维束并排形成的一张板； 因此， 裂纹或者裂缝是纤维束之间产生的分离 ， 是在旋切中相邻的纤维束被撕裂， 并非是因为纤维束的断裂或者破损； 因此 ， 在裂纹修复后， 单板 A的强度不会损失， 并且因为纤维束之间被胶合、 被挤压 得更为紧密， 因此单板 A的强度反而会显著提高；
[0043] 4、 由于现有技术的重组木板材是把木材碾压疏解或者旋切成较薄的单板后施 胶再随意堆积组坯经过高压高温压缩成型的， 因此， 其木材原有的纹理在一定 程度上遭受破坏； 而本发明先通过旋切或者刨切制板， 并没有将板材纤维打散 ， 而是旋切板或者刨切板自然地产生裂纹， 再通过浸胶压缩， 修复其裂纹； 在 修复裂纹的同吋不仅进行上下压缩， 也进行侧向压缩， 因此， 其木纹保持得很 好， 保留了天然木纹， 并且增加密度， 性能更加稳定；
[0044] 5、 本发明在压缩过程中， 既修复了裂纹， 同吋也提高了板材的硬度和密度； 最终可将板材的密度提高 10%以上。
对附图的简要说明
附图说明
[0045] 图 1是本发明单板 A的板材裂纹示意图。
[0046] 图中， 1-纵裂纹， 2-横裂纹， 3-斜裂纹。
实施该发明的最佳实施例
本发明的最佳实施方式
[0047] 原木纹理重组木板材， 由以下方法制得：
[0048] a、 将产自中国东北的橡树原木截断为 2000mm长度的木段， 然后进行蒸煮以软 化木材， 再通过旋切工艺， 制备长度 2000mm， 宽度 140mm， 厚度 16mm的橡木 单板；
[0049] b、 将单板放入摄氏 75°C的干燥机， 控制含水率 11%取出； 此吋单板尺寸基本 保持长度 2000mm， 而宽度有不同的收缩率， 134-136mm不等， 厚度也有变化为 1 5.2-mm- 15.4mm不等；
[0050] c、 将单板放进一个预先装有配伍水和其它两种溶液混合的容器中， 这两种溶 液分别是 30%固体含量的水溶性酚醛树脂， 45%固含量的丁腈橡胶乳液， 其中丁 腈橡胶溶液的含量占水溶性酚醛树脂的 7%。 闭合容器门， 输入压缩空气， 压力 表显示 0.6MPa后保压 120分钟， 然后排气， 幵门取出单板。
[0051] d、 检査单板见到已经渗透混合液体， 取出过滤多余液体；
[0052] e、 将单板送回摄氏 70°C的干燥窑中烘干到含水率 10%取出， 此吋候检査该单板 长度没见明显变化， 为 2000mm， 宽度因为木材不同部位原始密度本来就不一样 ， 显示有误差， 大约在 132-136mm范围； 厚度也一样有误差大约在 15.0-15.3mm
[0053] f、 将单板放置于热压机的定厚 13.4 mm， 定宽 130mm的模具中； 压机为 4层热 压机， 每层放置 4片单板， 一共 16片单板；
[0054] g、 热压机板面温度为摄氏 133-135°C;
[0055] h、 单板放入模具就位后， 首先将热压钢板闭合到紧贴单板， 再将模具定宽到 1 30mm进行侧压就位， 再进行垂直上下方向热压到单板厚度 14mm。 保压保温 18 分钟固化完毕出板； 在这个过程中， 如图 1所示的纵裂纹 1、 横裂纹 2和斜裂纹 3 均被修复；
[0056] i、 对单板进行砂光处理后得到完整的橡木硬质单板， 尺寸为长度 2000mm， 宽 度统一为 130mm， 厚度统一为 13 mm。
本发明的实施方式
[0057] 实施例一
[0058] 原木纹理重组木板材， 由以下方法制得：
[0059] a、 将产自中国东北的橡树原木截断为 2000mm长度的木段， 然后进行蒸煮以软 化木材， 再通过旋切工艺， 制备长度 2000mm， 宽度 250mm， 厚度 6.1~6.5mm的 橡木单板；
[0060] b、 将单板放入 75°C的干燥机， 控制含水率 10~11%取出； 此吋单板尺寸基本保 持长度 2000mm， 而宽度有不同的收缩率， 238-242mm不等， 厚度也有变化为 5.8 mm-6.2mm不等；
[0061] c、 将单板放进一个预先装有配伍 25%固体含量的水溶性酚醛树脂胶黏剂的压 力容器中， 闭合容器门；
[0062] d、 输入压缩空气至压力表显示 0.4Mpa后保压 60分钟， 然后排气， 幵门取出静 置单板 1.5小吋， 滤掉单板表面过多的液体；
[0063] e、 将单板送回 75°C的干燥机中烘干到含水率 10%后取出， 此吋检査该单板长度 没见明显变化， 宽度因为木材不同部位原始密度本来就不一样， 显示有误差， 大约在 237-240mm范围； 厚度也一样有误差大约在 5.6-6.0mm;
[0064] f、 将单板放置于热压机内的定厚 5.0mm定宽 235mm的模具中， 压机为 4层热压 机， 每层放置 4片单板， 一共 16片单板；
[0065] g、 热压机板面温度为 134-137°C;
[0066] h、 单板放入模具就位后， 首先将热压钢板闭合到紧贴单板的厚度固定单板， 然后将模具定宽到 235mm侧压到位， 再进行垂直上下方向热压到模具厚度 5.0mm ； 保压保温 12分钟， 出板； 在这个过程中， 如图 1所示的纵裂纹 1、 横裂纹 2和斜 裂纹 3均被修复；
[0067] i、 对单板进行砂光处理后得到完整的橡木硬质单板， 尺寸为长度 2000mm， 宽 度统一为 235mm， 厚度统一为 4.6mm。
[0068] [0040]实施例二
[0069] 原木纹理重组木板材， 由以下方法制得：
[0070] a、 将产自中国广西的桉树原木截断为 2000mm长度的木段， 然后进行蒸煮软化 ， 通过旋切制得长度 2000mm， 宽度 600mm， 厚度 6.2mm的桉木单板；
[0071] b、 将单板放入摄氏 75°C的干燥机， 控制含水率 10%取出； 此吋单板长度 2000m m未见明显变化， 而宽度有不同的收缩率， 553-580mm不等， 厚度也有变化为 5.7 mm-6.0mm不等；
[0072] c、 将单板放进一个预先装有 40%固体含量的水溶性脲醛树脂胶黏剂的压力容 器中， 闭合容器门；
[0073] d、 输入压缩空气至压力表显示 0.6Mpa后保压 60分钟， 然后排气， 幵门取出静 置单板 1.0小吋， 滤掉单板表面过多的液体；
[0074] e、 将单板送回 45°C的干燥机中烘干到含水率 17%取出， 此吋检査该单板长度没 见明显变化， 宽度因为木材不同部位原始密度本来就不一样， 显示有误差， 大 约在 553-575mm范围； 厚度也一样有误差大约在 5.6-5.8mm;
[0075] f、 将单板放置于热压机的定厚 5.0mm， 定宽 550mm的模具中； 压机为 4层热压 机， 每层放置 2片单板， 中间隔与木材一样宽度的耐高温薄膜， 一共 8片单板； [0076] g、 热压机板面温度为 96-100°C;
[0077] h、 单板放入模具就位后， 首先将热压钢板闭合到紧贴单板的厚度固定单板， 然后将模具定宽到 550mm并侧压到位， 再进行垂直上下方向加压到模具厚度 5.0 mm; 保压保温 10分钟出板； 在这个过程中， 如图 1所示的纵裂纹 1、 横裂纹 2和 斜裂纹 3均被修复；
[0078] i、 对单板进行砂光处理后得到完整的桉木硬质单板， 尺寸为长度 2000mm， 宽 度统一为 550mm， 砂光后厚度统一为 4.6mm。
[0079] [0041]实施例三
[0080] 原木纹理重组木板材， 由以下方法制得：
[0081] a、 将山东产的白杨木原木截断为 1000mm长度的木段， 然后进行蒸煮软化， 通 过旋切制得长度 1000mm， 宽度 600mm， 厚度 6.2mm的杨木单板；
[0082] b、 单板浸泡于 80°C带碱性的水溶液中 3小吋， 再换成 90-95°C清水蒸煮 2小吋， 送入密封罐中进行抽空处理， 目的是疏通木材的纤维管孔， 利于浸胶； 然后将 单板放入 75°C的干燥机， 控制含水率到 6%取出； 此吋单板长度 1000mm未见明显 变化， 而宽度有不同的收缩， 530-550mm不等， 厚度也有变化为 5.5-5.7mm不等
[0083] c、 将单板放入压力容器中， 立即注入聚氨酯液体， 闭合容器门；
[0084] d、 采用医用手推注射器原理的的螺杆式活塞推进罐内聚氨酯液体， 使得胶黏 剂全部淹没木板， 并排除空气后关闭顶部阀门； 螺杆继续推进活塞， 直至压力 表显示 l.OMPa吋保压 60分钟； 然后后退螺纹顶杆， 幵启灌顶阀门让空气进入， 常压条件吋候幵门取出单板除去多余液体；
[0085] e、 将单板放置于涂布了脱模剂的 10层压机中， 定厚 5.3mm， 定宽 525mm的模 具中； 每层放置 2片单板， 一共 20片单板；
[0086] f、 单板放入模具就位后， 首先将压机钢板闭合到紧贴单板的厚度固定单板， 然后将模具定宽到 525mm并侧压到位， 再进行垂直上下方向压单板至模具厚度 5. 3mm, 保压 12小吋在常温下完全固化后退压出板； 在这个过程中， 如图 1所示的 纵裂纹 1、 横裂纹 2和斜裂纹 3均被修复；
[0087] g、 对单板进行砂光和裁切处理后得到完整的杨木硬质单板， 尺寸为长度 1000 mm, 宽度统一为 525mm， 砂光后厚度统一为 5.0mm;
[0088] 由此实施例三可见， 实施例三使用聚氨酯树脂与实施例一， 二的水溶性酚醛树 脂和水溶性脲醛树脂最大的不同点是， 压机不需要加温， 最终产品体积损耗减 少， 可用材料体积增加。 注入木材内部的聚氨酯填充效果好， 提升了木材密度 ， 虽未达到压缩比 10%， 但是木材的密实度上升， 力学性能也提高了。
[0089] [0042]实施例四
[0090] 原木纹理重组木板材， 由以下方法制得：
[0091] a、 将产自中国东北的橡树原木截断为 2000mm长度的木段， 然后进行蒸煮以软 化木材， 再通过旋切工艺， 制备长度 2000mm， 宽度 140mm， 厚度 16mm的橡木 单板；
[0092] b、 将单板放入摄氏 75°C的干燥机， 控制含水率 11%取出； 此吋单板尺寸基本 保持长度 2000mm， 而宽度有不同的收缩率， 134-136mm不等， 厚度也有变化为 1 5.2-mm- 15.4mm不等；
[0093] c、 将单板放进一个预先装有配伍水和其它两种溶液混合的容器中， 这两种溶 液分别是 30%固体含量的水溶性酚醛树脂， 45%固含量的丁腈橡胶乳液， 其中丁 腈橡胶溶液的含量占水溶性酚醛树脂的 7%。 闭合容器门， 输入压缩空气， 压力 表显示 0.6MPa后保压 120分钟， 然后排气， 幵门取出单板。
[0094] d、 检査单板见到已经渗透混合液体， 取出过滤多余液体；
[0095] e、 将单板送回摄氏 70°C的干燥窑中烘干到含水率 10%取出， 此吋候检査该单板 长度没见明显变化， 为 2000mm， 宽度因为木材不同部位原始密度本来就不一样 ， 显示有误差， 大约在 132-136mm范围； 厚度也一样有误差大约在 15.0-15.3mm
[0096] f、 将单板放置于热压机的定厚 13.4 mm， 定宽 130mm的模具中； 压机为 4层热 压机， 每层放置 4片单板， 一共 16片单板；
[0097] g、 热压机板面温度为摄氏 133-135°C; [0098] h、 单板放入模具就位后， 首先将热压钢板闭合到紧贴单板， 再将模具定宽到 1 30mm进行侧压就位， 再进行垂直上下方向热压到单板厚度 14mm。 保压保温 18 分钟固化完毕出板； 在这个过程中， 如图 1所示的纵裂纹 1、 横裂纹 2和斜裂纹 3 均被修复；
[0099] i、 对单板进行砂光处理后得到完整的橡木硬质单板， 尺寸为长度 2000mm， 宽 度统一为 130mm， 厚度统一为 13 mm。
[0100] 将采用本发明生产的原木纹理重组木板材和相同树种的锯切材木板， 加工成厚 度宽度一致的板材后， 处理至含水率 9〜10%， 按照标准 《GB/T17657-2013人造 板及饰面人造板理化性能试验方法》 和 《LYT 1984-2011重组木地板》 进行检测
， 结果如下表所示：
[0101] [数]
Figure imgf000015_0001
[0102] 对比可以发现， 根据本发明生产的一种原木纹理重组木板材和相同树种的锯切 材比较， 其物理力学性能都有不同程度的改善， 产品经过再加工， 可以制成地 板、 家具等产品， 密度增加， 抗变形抗幵裂能力增强， 并且生产成本降低。 本 发明制造方法充分利用速生木材， 节约能源， 对环境友好， 产品使用范围广， 推广意义较大。

Claims

权利要求书
[权利要求 1] 原木纹理的重组木板材， 其特征在于由原木旋切或者刨切制成厚度为
3〜20mm的单板后经浸胶和热压处理制得； 所述重组木板材的压缩比 >10%； 依据 《GB/T17657-2013人造板及饰面人造板理化性能试验方 法》 和 《LYT 1984-2011重组木地板》 进行检测， 密度为 0.7〜1.3g/cm 3、 吸水厚度膨胀率≤3.0%、 内胶合强度≥3.0MPa; 所述重组木板材相 比相同材质的锯切材木板， 依据 《GB/T17657-2013人造板及饰面人 造板理化性能试验方法》 和 《LYT 1984-2011重组木地板》 进行检测 ， 密度增加 10%以上、 吸水厚度膨胀率降低 20%以上、 内结合强度增 加 35%以上。
[权利要求 2] 根据权利要求 1所述的原木纹理的重组木板材的制造方法， 包括以下 步骤：
a、 原木通过旋切或者刨切制得厚度为 3〜20mm且具有裂纹伤的单板 A;
b、 对单板 A进行干燥处理；
c、 对单板 A进行浸胶处理；
d、 对单板 A进行裂纹修复处理；
所述裂纹修复处理具体为： 先对单板 A侧向加压使纵向或者斜向幵裂 的裂纹在单板 A的宽度方向上闭合或者大部分闭合， 大部分修复纵裂 纹和斜裂纹的纵向部分； 再对单板 A在垂直上下方向热压使横向或者 斜向幵裂的裂纹在单板 A的厚度方向上消除， 修复横裂纹和斜裂纹的 横向部分， 同吋补充修复纵裂纹和斜裂纹的纵向部分； 并且继续热压 使单板 A的厚度降低， 单板 A的密度提高， 再保温保压使浸入单板 A 内部的胶黏剂完全固化， 使修复的裂纹稳固， 得到品质稳定的原木纹 理的重组木板材。
[权利要求 3] 根据权利要求 2所述的原木纹理的重组木板材的制造方法， 其特征在 于： 步骤 a中， 采用旋切或者刨切制得厚度为 3〜20mm的带裂纹伤的 单板 A; 步骤 b的干燥处理是将单板 A的含水率控制在 7〜15%； 步骤 c 中， 所述胶为水溶性酚醛树脂胶水、 水溶性脲醛树脂胶水、 聚氨酯胶 水、 水溶性酚醛树脂胶水和丁腈橡胶乳液的混合液体中的一种。 根据权利要求 2或 3所述的原木纹理的重组木板材的制造方法， 其特征 在于： 步骤 b中， 采用连续式输送干燥机进行快速干燥处理， 干燥机 内温度 75〜120°C， 干燥吋间 60〜300min， 将单板 A的含水率控制到 7 〜15%。
根据权利要求 2或 3所述的原木纹理的重组木板材的制造方法， 其特征 在于： 所述的水溶性酚醛树脂胶水和丁腈橡胶乳液的混合液体中， 水 溶性酚醛树脂的固含量为 45%吋， 使用固体含量为 45%的丁腈橡胶乳 液占水溶性酚醛树脂重量的 5〜15%。
根据权利要求 2或 3所述的原木纹理的重组木板材的制造方法， 其特征 在于： 步骤 d中， 在修复纵裂纹和斜裂纹的纵向部分吋， 采用模具定 宽法； 在修复横裂纹和斜裂纹的横向部分吋， 采用模具定厚法。 根据权利要求 2或 3所述的原木纹理的重组木板材的制造方法， 其特征 在于： 步骤 d中， 将一张或多张单板 A置放在模具框内， 采用压机进 行双向侧面加压或者单向侧面加压的方式压缩一张或多张单板 A， 将 单板 A的宽度压缩到模具框的宽度； 再通过热压机进行定厚重压， 将 单板 A的厚度降低到定厚模具框的厚度。
根据权利要求 2或 3所述的原木纹理的重组木板材的制造方法， 其特征 在于： 步骤 c中， 所述的胶水为水溶性酚醛树脂或者水溶性酚醛树脂 与丁腈橡胶乳液的混合液体， 固含量为 20〜45%， 浸胶采用加压浸渍 法， 浸胶压力控制为 0.3〜1.0MPa; 步骤 c与 d之间还包含有二次干燥 步骤， 具体为： 将浸胶后的单板 A在 60〜90°C的温度下烘干至含水率 6〜12%； 步骤 d中， 热压吋， 控制压机板面温度为 125〜140°C， 作用 于板材的上下垂直压力至少为 15kg/cm 2。
根据权利要求 2或 3所述的原木纹理重组木板材的制造方法， 其特征在 于： 步骤 c中， 所述胶为水溶性脲醛树脂； 步骤 c与 d之间还包含有二 次干燥步骤， 具体为： 将浸胶后的单板 A在 50°C以下的低温烘干到含 水率 20%以下； 步骤 d， 将二次烘干的单板 A及吋送入压机进行裂纹修 复处理并固化， 固化温度为 90〜115°C。
[权利要求 10] 根据权利要求 2或 3所述的原木纹理重组木板材的制造方法， 其特征在 于： 步骤 c中， 所述胶为聚氨酯； 在单板 A进行聚氨酯浸胶前， 预先 进行单板 A的预处理， 所述预处理包括以下步骤：
(1) 、 将单板 A在碱水中浸渍；
(2) 、 蒸煮后冲洗， 采用负压吸出法疏通单板 A的管孔；
(3) 、 将单板 A烘干到含水率 10%以下；
(4) 、 采用加压浸渍法把聚氨酯胶压入到单板 A内部；
(5) 、 采用模具定宽法和模具定厚法压板之后， 在常温状态下固化 ， 取出板材。
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