CN101495278A - Panel containing bamboo and cedar - Google Patents

Panel containing bamboo and cedar Download PDF

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Publication number
CN101495278A
CN101495278A CNA2006800444010A CN200680044401A CN101495278A CN 101495278 A CN101495278 A CN 101495278A CN A2006800444010 A CNA2006800444010 A CN A2006800444010A CN 200680044401 A CN200680044401 A CN 200680044401A CN 101495278 A CN101495278 A CN 101495278A
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CN
China
Prior art keywords
bamboo
bar
weight
composite plate
cedar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2006800444010A
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Chinese (zh)
Inventor
E·N·罗森
B·C·吉瑞罗
F·R·塞西略
B·M·皮克
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Huber Engineered Woods LLC
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Huber Engineered Woods LLC
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Filing date
Publication date
Application filed by Huber Engineered Woods LLC filed Critical Huber Engineered Woods LLC
Publication of CN101495278A publication Critical patent/CN101495278A/en
Pending legal-status Critical Current

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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
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/065—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/067—Wood fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • 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
    • B32B2307/764—Insect repellent
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

Disclosed is a strand composite board comprising: lignicellulosic strands containing about 25 wt% to about 75 wt% bamboo strands, about 25 wt% to about 75 wt% cedar strands, and an isocyante binder resin.

Description

The plate that contains bamboo and cdear
Background of invention
Timber is the common material that is used for making up different size, is used for the various different objects of difference in functionality.Even after having developed several novel composite material, as the most widely used structural material, still have application widely up at present, reason is that timber has good intensity and rigidity, the aesthetics of pleasant, good insulation performance character and workability.
Yet in recent years, because the continuous consumption of the virgin forest of long term growth, the cost of solid wood material significantly improves with the solid wood material tight supplies.For the product by the timber manufacturing, this class timber is very expensive, because only become natural solid wood material less than half usually in the timber of felling, remaining all abandons as waste material.
Therefore, because the cost of high-class timber and paying close attention to the preservation natural resources, developed based on timber with based on the substitute of ligno-cellulosic materials, replaced the wood material, these substitutes can more effectively be utilized the timber of felling and reduce the amount of wood that abandons as waste material.Glued board, particularly flakeboard and directed batten (" OSB ") are the examples of substitute of the engineered composite material of wood material, and in the past 75 years, these composites have replaced the wood material in many structures field.
These not only use the resource of the supported supply of timber more effectively based on the composite of timber, and can be formed by the lower-grade wood of seldom using usually.
Bamboo is an example of the material that is of little use of this class.Bamboo is because its high strength, durability and splendid dimensional stability, with and convenient supply and replenishing rapidly, be a kind of ligno-cellulosic materials that is widely used as construction material in full Asia.The bamboo growth is very fast, reaches full maturity in 2-6, even and growth trees the soonest also need 15-30 ability growth and maturity.
Yet also there are many shortcomings of other ligno-cellulosic materials and timber products in bamboo except these advantages.Significant disadvantage is the attack that bamboo is vulnerable to insect such as moth and termite and mould and fungi.
U.S. termite is the reason that civil buildings and commercial building are caused serious harm.Most this infringements are caused by subteranean termites, and this class termite normally enters building or the structure from soil on every side, is food with the timber in the building.Subteranean termites extremely difficulty realizes that prompting has the clues and traces of termite activity to comprise the existence of worm trail (streamer) or feed (forager).For preventing that termite infestation from entering building or structure, the builder can be provided with (or requiring to be provided with) termite barrier in certain specification, or building in depth around the following soil with wherein spray termitifuge.But these measures were usually lost efficacy, and reason has the termite barrier for example suitably is not set, the misuse termitifuge, or after several years, termitifuge loses its effectiveness.Therefore, suppose to have difficulties aspect the termite infestation realizing termite and prevent, desirable method is timber or the ligno-cellulosic materials with termite-proof.
Though the object as the Hollywood horror film seldom is feasible, the cumulative damage that is caused by fungi has substantially exceeded the infringement that termite is caused.Well-known example is white rot and brown rot in the fungi, and their are decomposing lignocellulose material initiatively, utilizes natural constituents in the timber as carbon source and energy source.
Develop various technology and solved rotten problem in fungi and the ligno-cellulosic materials.For example, carry out pressurized treatments with the compound of arsenical, borate and halogenation and only obtain some limited success.Unfortunately, these compounds or high toxicity, or be not suitable for making based on timber with based on the compound of ligno-cellulosic materials.
Under the situation of above-mentioned background technology, there is the demand to the web composite plate in this area, this composite plate should have the superior strength performance of bamboo, can resist the invasion and attack of insect and fungi again, and does not need to use toxicity or potential harmful pressurized treatments chemical reagent.
Summary of the invention
The present invention relates to a kind of web composite plate, this composite plate comprises: lignocellulosic bar and isocyanate binder resins, lignocellulosic bar contain about 25-75 weight % bamboo bar, about 25-75 weight % cedar strands.
Detailed Description Of The Invention
Unless stipulate in addition, all parts, percentage and ratio that this paper adopts are all represented with weight.It is for referencial use that the All Files that this paper quotes is all included this paper in full with it.
" ligno-cellulosic materials " that this paper adopts is meant a kind of eucaryotic cell structure, and it has the cell membrane that the cellulose that combines by lignin polymers and hemicellulose fibers are formed.Timber is a kind of ligno-cellulosic materials.
" strand composite material " refers to comprise the composite of ligno-cellulosic materials and one or more other additives such as adhesive or wax.The non-limitative example of Wood composite material comprises: directed batten (" OSB "), as wafer board (waferboard), particieboard (particle board), hardboard (chipboard), medium density fibre board (MDF), glued board (plywood), and the plate of the compound of bar (strand) and synusia veneer.Think that this paper adopts " sheet ", " bar " and " wafer (wafer) " be equal to each other and can exchange use.The non-exclusionism of composite is described can be referring to the volume of augmenting of " but Ke-Ou Shi agate encyclopedia of chemical technology (Kirk-Othmer Encyclopedia of Chemical Technology) ", the 765-810 page or leaf, the 6th edition, it is for referencial use to include this paper in full in it.
Preferred implementation of the present invention is described below, and it provides a kind of engineering material, and this material comprises mixture, lignocellulosic composite component and the one or more bamboo layer of cedar wood and bamboo.The effect that comprises cdear is to drive away insect and fungi." fungi " of Cai Yonging refers to big group of eukaryotic microorganisms herein, and its cell contains nuclear, vacuole and mitochondria.Fungi comprises algae, mould, yeast, mushroom and Acarasiales.Referring to Biologyof Microorganisms (microorganism biological), T.Brock and M.Madigan, 6.sup.th Ed., 1991, Prentice Hill (Englewood Cliffs, NJ.).The fungi of example comprise sac fungus (as, neurospora, saccharomycete, hickory chick), basidiomycetes (as, agaricfly, agaric), zygomycete (as, Mucor, Rhizopus), oomycetes (as, different water mold) and Fungi Imperfecti (as, Penicillium notatum, aspergillus).
Example of mould is the basidiomycetes mould, so-called white rot and brown rot.Most of fungies, especially basidiomycetes decomposing lignocellulose material comprise that timber, paper, cloth and other are derived from the product of natural resources, and use cellulose or lignin as carbon source and energy source.To decompose nearly all be that behavior by these decay of wood fungies takes place to lignin in the Nature.Brown rot attacks and decomposition of cellulose, and lignin remains unchanged.White rot attacks and decomposition of cellulose and lignin.Referring to Biology of Microorganisms (microorganism biological), T.Brock and M.Madigan, 6.sup.th Ed., 1991, Prentice Hill (Englewood Cliffs, N.J.).
Therefore, the combination of bamboo bar and cedar strands can access the web joint product, or more specifically, is the strength characteristics with bamboo, has the repulsion insect of cdear and the sheet material of fungi characteristic simultaneously again.
The bamboo bar
As other ligno-cellulosic materials, the element of bamboo is the cellulose fibre that combines by lignin polymers, but the structure of the composition cell of bamboo is different with other timber with form.Usually, most of strength characteristics of bamboo (hot strength, flexural strength and rigidity) bamboo and bamboo fibre vertically on be maximum.This be since cellulose fibre in that the microfibril angle is less relatively longitudinally.The hardness of culm itself depends on the density of bamboo fiber bundle and their separate mode.Culm vertically or the percentage of fibers in the culm cross section inconsistent.Vertically, fibre density is from increasing to the stem top at the bottom of the stem, and the fibre density in the culm cross section reduces along with the core that gos deep into this material the highest near outer surface.And the intensity of culm exterior section and hardness improve because of the silica that has deposition, Wax-coated cuticular layer, and Wax-coated cuticular layer covers the surface of culm outside.Therefore, have excellent strength characteristics, in the application process of bamboo, also have excellent strength characteristics at the culm outer surface or near the bamboo of outer surface.To peel off cuticular layer in the method for use bamboo wood in the past, therefore abandon the maximum intensity part of culm, different with former method, among the present invention, use cuticular layer, therefore can keep the high strength properties of bamboo.
Generally, the rigidity of the cellulose fibre in the bamboo and intensity is all greater than the fiber of most of timber, and the intensity of sheet material that has added bamboo is more much bigger than the sheet material that is made of the other types wood-fibred with weight ratio.In first step of the present invention, bamboo trunk or the whole length of edge (1) bamboo trunk (being generally 4-40 foot distance) are rived, or (2) split into short-movie.For improving compatibility and the cohesive with conventional batten, preferably the bamboo bar is cut into thickness less than about 0.2 inch, as less than 0.15 inch, as in about 0.01-0.15 inch scope; Width is preferably greater than about 0.1 inch, as greater than about 0.15 inch, as greater than about 0.5 inch.
Can cut by hand or with mechanical clipping device.Be to improve intensity, the bamboo bar should cut along the longitudinal axis, and the length of preferred cutting is greater than about 2 inches, and 3 inches according to appointment, 5 inches according to appointment.Though do not wish to be bound by theory, but think when using disc type wire rod Direction Finder (disk strand orienter) bamboo bar orientation, the length of bamboo bar is long more, the bamboo bar is more closely alignd, and be not wishing to be bound by theory, think that the bamboo bar of close alignment more can make the wood composite panel products of making improve elastic modelling quantity along the longitudinal axis.
Behind the cutting bamboo bar, the bamboo bar carries out drying in stove, mix with cedar strands then.Ratio with about 25-75% cdear and about 25-75% bamboo (these parts by weight all are to be benchmark with the dry weight that has only batten, do not have other additive) mixes bamboo bar and batten.
Then, on bamboo bar and cedar strands, apply isocyanate resin (as described below).Isocyanate resin and other various additives of being applied to timber are called coating in this article, even isocyanate resin and additive are the fine particle form, as not forming continuous coated efflorescence particle or solid particle on timber.Usually, by one or more sprayings, blending or hybrid technology described isocyanate resin, wax and any other additive are applied over timber, optimization technique be when batten rolls in the drum-type mixing machine with wax, resin and other additive injection to batten.
Isocyanate resin is selected from down group: diphenyl-methane-right, to '-polymer of diisocyanates, described polymer has and can form polymeric groups such as polyureas ,-NCON-, and polyurethane, the NCO-functional group of-NCOON-with other organic group reaction; Preferably contain 4 of the 50 weight % that have an appointment, the adhesive of 4-'-diphenylmethane diisocyanate (" MDI ") or the mixture of other oligomeric isocyanates (" pMDI ") is arranged.Suitable industrial pMDI product is the Mondur 541 available from the Rubinate 1840 of the hunter company (Huntsman) of salt lake city, the Utah State and the North America Beyer Co., Ltd in Pennsylvania Pittsburgh city (Bayer Corporation, North America).Other are fit to be used alone as adhesive or resin suitable and the pMDI combination is carboxaldehyde radicals liquid PF, powdery PF, UF MUF adhesive, and their combination.Industry MUF adhesive is the LS 2358 and LS 2250 products of Dai Ni company (Dynea corporation).In preferred preparation, the application concentration of isocyanates is about 2-12 weight % (gross weight with the lignin fibre web is a benchmark).
After applying isocyanates, use the bamboo bar and the cedar strands that apply to form multilayer mats, preferred 3 layers of pad then, are pressed into composite wood component with described pad.Finish described stratification with the following methods.Coated sheet is spread out on conveyer belt, the orientation that forms sheet basically with conveyer belt be a straight line or parallel with it first or layer, then second is placed on first, the orientation of the sheet of second lamella is vertical with conveyer belt basically.At last, the 3rd is placed on second, the orientation of the sheet of the 3rd lamella and first are similar, are a straight line with conveyer belt basically, make that the orientation of each sheet of the lamella that piles up by this way is vertical with adjacent lamella usually.Perhaps, but more not preferred, each bar of all lamellas is oriented to any direction.Can adopt known multichannel technology and bar orientation apparatus the deposition a plurality of or layer.Under the situation of 3 or 3 layers pad, first and the 3rd is superficial layer, and second is sandwich layer.Described each superficial layer has outer surface.
After said method formation multilayer mats, under hot press,, make timber, adhesive and the fusion of other additive and be bonded together the compacting OSB plate of formation all thickness and size they compactings.High temperature also can make adhesive material solidify.Preferably with plate of the present invention temperatures system 2-15 minute at about 175-240 ℃.The density of the composite plate of making is about 35-55 pound/foot 3(measuring) according to ASTM standard D1037-98.The thickness of OSB plate is about 0.6cm (about 1/4 inch)-5cm (about 2 inches), 1.25-6cm, 2.8-3.8cm according to appointment according to appointment.
Describe the present invention in detail with reference to following concrete non-limiting example.
Embodiment
Be prepared as follows the web composite plate of the mixture that comprises bamboo bar and cedar strands.Cut out bamboo bar (under some situation, with 24 hours under water of bamboo, making the bamboo bar then) by the bamboo bar, bamboo bar average-size is that inch wide * 6,0.025 inch thick * 2 are inch long.The bamboo bar mixes with cedar strands with three kinds of different ratios (referring to following Table I).The average-size of cedar strands is that inch wide * 5,0.032 inch thick * 3 are inch long.The MDI resin applies with the concentration of about 5 weight %, and applies about 1.5 weight % slack waxs (slack wax).
Preparation web composite plate, this composite plate has 60% web at superficial layer, at sandwich layer 40% web is arranged, and is wherein, vertical mutually basically with the orientation at the web of superficial layer at the web of sandwich layer.Make three groups of plates with the cedar strands that following Table I is listed with three kinds of the bamboo bar different blends.The manufacture of plate is as follows, under more than or equal to 200psi pressure, in 400 compacting described webs 175 seconds, is pressed into 3/4 inch target thickness, and the target density of 44pcf.
The plate of respectively organizing to preparation carries out MOE and MOR test and measures (according to ASTM standard D1037-98), and to the results averaged of each independent groups.The results are shown in following Table I.
Table I
75% cdear, 25% bamboo 50% cdear, 50% bamboo 25% cdear, 75% bamboo
MOE(psi) 530,000 840,000 935,000
MOR(psi) 2,400 5,700 4,800
Test result shows that the intensity of the plate that bamboo bar ratio is higher is greater than the higher plate of cedar strands ratio.But all plates all show the satisfactory performance that can be used for structure applications.
Measure antimycotic aggressive according to NWWDA TM1 method of testing.At the test period in 16 weeks, measure the 3/4 inch cubical loss in weight (weight loss of 3/4 cube) that causes because of fungal attack.To this particular studies, use the brown rot fungus gloeophyllum trabeum to attack sample, known this fungi can attack bamboo strongly.100% bamboo OSB sample of timber weight shows that in 16 weeks tests back the average weights loss is 21%.The average weight loss of 100% cdear sample is 8.7%, obtainable maximum benefit when this result has represented the use cdear.When the cdear of the 25-75% that adds timber weight among the OSB that is containing bamboo, the loss in weight is 13-18%, and this can obtain the benefit of the 25-65% of maximum benefit.
It will be appreciated by those skilled in the art that under the situation that does not depart from the main inventive principle of the present invention, can make change above-mentioned embodiment.Therefore, should be appreciated that, the invention is not restricted to the disclosed specific embodiment, and it is intended that the interior various modifications of spirit and scope of the invention that comprise that appended claims limits.

Claims (7)

1. web composite plate, this composite plate comprises:
Lignocellulosic bar and isocyanate binder resins, described lignocellulosic bar comprise the cedar strands of bamboo bar and the 25-75 weight % of about 25-75 weight %.
2. web composite plate as claimed in claim 1 is characterized in that described isocyanate binder resins is MDI.
3. web composite plate as claimed in claim 1 is characterized in that, described web composite plate is OSB.
4. web composite plate as claimed in claim 1 is characterized in that described isocyanate binder resins is MDI, and described MDI exists with the concentration based on about 2-12 weight % of lignocellulosic bar weight.
5. web composite plate, this composite plate has upper surface, lower surface and sandwich layer, the lignocellulosic bar of described upper surface and lower surface is pressed first direction basically and is orientated, the lignocellulosic bar of sandwich layer is orientated by second direction, wherein, first direction obviously is different from second direction, and the lignocellulosic bar comprises the cedar strands of bamboo bar He the about 25-75 weight % of about 25-75 weight %, and described web composite plate also comprises isocyanate binder resins.
6. web composite plate as claimed in claim 5 is characterized in that described isocyanate binder resins is MDI.
7. web composite plate as claimed in claim 5 is characterized in that described isocyanate binder resins is MDI, and described MDI exists with the concentration based on about 2-12 weight % of lignocellulosic bar weight.
CNA2006800444010A 2005-11-30 2006-11-22 Panel containing bamboo and cedar Pending CN101495278A (en)

Applications Claiming Priority (2)

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US11/290,660 US20070122616A1 (en) 2005-11-30 2005-11-30 Panel containing bamboo and cedar
US11/290,660 2005-11-30

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CN (1) CN101495278A (en)
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TW (1) TW200726643A (en)
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US20070122616A1 (en) 2007-05-31
WO2007075245A3 (en) 2009-02-05
AR056823A1 (en) 2007-10-24

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