WO2001049483A1 - Element structurel leger - Google Patents
Element structurel leger Download PDFInfo
- Publication number
- WO2001049483A1 WO2001049483A1 PCT/US2001/000502 US0100502W WO0149483A1 WO 2001049483 A1 WO2001049483 A1 WO 2001049483A1 US 0100502 W US0100502 W US 0100502W WO 0149483 A1 WO0149483 A1 WO 0149483A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- veneer
- veneers
- core
- foam
- layers
- Prior art date
Links
Classifications
-
- 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
-
- 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
- B32B21/047—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 foam
-
- 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
- B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
- B32B43/003—Cutting
-
- 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
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0221—Vinyl resin
- B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/08—Closed cell foam
-
- 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
- B32B2307/718—Weight, e.g. weight per square meter
Definitions
- the present invention relates to a lightweight, wood-based
- sawn lumber is often dimensionally unstable, and may shrink or warp after
- LVL is similar to plywood in that it is made by laminating a sandwich of
- the moisture content of the veneers is set to the desired
- every second veneer sheet is
- a second benefit is that there is no size
- veneers may be joined together to make LVL stock of any length. Yet another
- LVL cannot easily be fabricated in larger dimensions without warping or
- the weight of LVL can be a problem. This can become even more of a problem
- Some hollow members have been constructed with a foam core.
- the foam offers little, if any, structural support, and the panels may crash
- One aspect of the present invention provides a lightweight
- the member has opposing ends, and a core with a first
- the core comprises alternating
- veneer layers and polymer layers, and the veneer layers each include at least
- a first laminated veneer lumber face is
- Another aspect of the present invention provides a lightweight
- structural member including a first piece of laminated veneer lumber with an
- a plurality of veneer layers each with a longitudinal axis and opposing
- layer includes at least one sheet of veneer.
- opposing faces of the veneer layers are perpendicular to the upper face and
- a plurality of polymer is a plurality of polymer
- Yet another aspect of the present invention provides a lightweight
- the core suitable for use as an interior of a structural member.
- the core includes a
- first laminated veneer lumber piece and a plurality of layers of a polymer material, including a first layer and a last layer, wherein each layer of the
- polymer material is spaced apart from other layers, and wherein the first layer
- each veneer layer including at least one sheet of
- veneer is disposed between the layers of the polymer material.
- each veneer layer has opposing faces, and each face of each veneer layer is in contact with
- Fig. 1 is an isometric view of a lightweight stractural member
- Fig. 2 is an isometric view of a core blank from which core pieces
- Fig. 3 is an isometric view of a core blank with two core pieces
- FIG. 4 is a sectional view of a core piece taken along line 4-4 of
- FIG. 3 depicting a core piece before the first and second laminated veneer
- Fig. 5 is a sectional view taken along line 5-5 of Fig. 1, depicting
- Fig. 6 is a top plan view of one end of a second embodiment
- Fig. 7 is a side sectional view taken along line 7-7 of Fig. 6;
- Fig. 8 is a top plan view of one end of the second embodiment
- Fig. 9 is a side sectional view taken along line 9-9 of Fig. 8;
- Fig. 10 is an isometric view of the first embodiment, with the
- Fig. 11 is an isometric view of the first embodiment
- Fig. 12 is a schematic representation of the laying-up process for
- the present invention provides a novel lightweight structural
- a first embodiment of the present invention is a laminated veneer lumber, or LVL, that avoids the problems of many known structural members.
- Fig. 1 depicted in Fig. 1 and is indicated generally at 10. This
- structural member 10 has a core piece 12, a first face piece 14 and a second
- the length L of member 10 is typically greater than the width
- the thickness T of member 10 can be chosen to suit the strength and
- second face pieces is one inch. This defines a one-inch space for core piece 12.
- the core piece 12 is constructed of alternating layers of a veneer
- the side pieces 22 of the core piece 12 are
- the veneer layers 18 provide support for the center portions of
- each veneer layer 18 may be used for each veneer layer 18
- Expanded polymer layers 20 provide lateral support for veneer
- a closed cell material is preferable to an open
- the preferred closed cell expanded polymer is foamed
- polystyrene such as STYRAFOAM ® .
- the sides 22 of core piece 12 are normally made of pieces of
- LVL comprising multiple layers of veneers.
- the present invention may be fabricated in any number of ways, an example
- Member 10 is constructed by
- Figure 2 shows a core blank at 24, from which individual core pieces may be
- Core blank 24 is manufactured to be essentially the same length as the
- core blank 24 is constructed to a
- the thickness T of member 10 in Fig. 1 includes the thickness
- Core blank 24 has a width that corresponds
- the first step in the manufacture of the core piece 12 is the
- core blank 24 may be constructed.
- veneer layer 118 in the core blank 24 corresponds to veneer layer 18
- Core blank 24 is made of alternating layers of 1/8" thick veneer
- core blank 24 are 1" x 24 x / 2 x 16.1' pieces of laminated veneer lumber.
- core blank 24 is a pressure sensitive hot melt glue. It serves to hold together
- first and second face pieces 14 and 16 can be added to core piece
- bottom layer 122 is placed on the adhesive-coated surface of bottom
- expanded layer 120 is added. Alternating layers of veneer 118 and expanded
- the last layer added is the LVL top layer 122a.
- top layer 122a is added, the entire core blank 24 is pressed together, for
- indicated at 28 represent additional cuts that may be made to remove more core
- Figure 4 shows a sectional view of the finished core piece 12
- both side pieces 22 are in full contact with the adjacent expanded polymer layers. Furthermore, both the top surface 30 and the bottom surface 32
- each veneer layer 18 will be in good contact with face pieces 14 and 16 of the
- Figure 5 is a sectional view of a completed structural member
- thermosetting glue This lay
- veneer of face piece 16 is first laid up and a coat of phenolic resin or other
- veneer 16a glue is applied to it.
- the inner-most veneer 16c is then
- veneers 14a, 14b and 14c are sequentially applied to core piece 12
- the assembly is then passed to a microwave press where
- polystyrene foam 20 may begin to degrade.
- a conventional press may be used without
- microwave assist In that event curing is likely to take about 8 hours.
- core piece 12 structural integrity of core piece 12 is such that it can withstand these curing
- stractural members 10 are
- an end cap 40 shown in Figs. 8 and
- End caps
- a polyol and an isocyanate in amounts effective to form a polyurethane.
- diphenol diisocyanate diphenol diisocyanate.
- Calcium carbonate is used as a filler.
- a chain extender such as ethylene glycol may also be added, as may a cross-linking agent such as
- titanium dioxide may be used. In some embodiments, titanium dioxide may be used.
- mixture could be comprised of the following materials in these percentages by
- the castor oil is first mixed with the calcium
- the castor oil may be
- the slurry may then be heated to reduce its viscosity prior to mixing.
- the slurry may then be heated to reduce its viscosity prior to mixing.
- End caps 40 are applied to each of the members 10 by first cutting
- end caps may be used, or they may be deleted altogether.
- end cap 40 is, however, the preferred embodiment.
- FIG. 10 shows side piece 14', before the
- top or outer laminate or veneer of the three-laminate LVL has been applied.
- the cross-laminate, shown at 46, is typically about 18 inches wide. Grain lines
- FIG. 11 shows the side piece 14' after the
- splitting may take place because the wood covered by the end caps is
- veneer lumber normally includes laminates having grains extending the same
- the laminates has portions having a grain extending perpendicular to the grain
- cross wise laminate 46 includes cross wise laminate 46, as well as end caps 40. It may be that in some
- crosswise laminate is provided for the entire length of member
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU34418/01A AU3441801A (en) | 2000-01-05 | 2001-01-03 | Lightweight structural member |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US47803900A | 2000-01-05 | 2000-01-05 | |
US09/478,039 | 2000-01-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001049483A1 true WO2001049483A1 (fr) | 2001-07-12 |
Family
ID=23898289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/000502 WO2001049483A1 (fr) | 2000-01-05 | 2001-01-03 | Element structurel leger |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU3441801A (fr) |
WO (1) | WO2001049483A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101830012A (zh) * | 2010-05-07 | 2010-09-15 | 广西大学 | 单板条双向定向重组木板及其制造方法 |
WO2014037286A1 (fr) * | 2012-09-07 | 2014-03-13 | Ed. Züblin Ag | Panneau de lames de bois multicouche |
BE1024499B1 (nl) * | 2017-01-04 | 2018-03-13 | Den Nieuwen Buiten Bvba | Een nieuw geïsoleerd bouwelement met kruisligging van de vezels en werkwijze voor gebruik daarvan |
GB2558215A (en) * | 2016-12-22 | 2018-07-11 | Gurit Uk Ltd | Cores for composite material sandwich panels |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3637459A (en) * | 1970-03-17 | 1972-01-25 | Dow Chemical Co | Structural panel having foam plastic core |
US3976526A (en) * | 1974-09-16 | 1976-08-24 | The Dow Chemical Company | Preparation of curved composite panel containing a rigid foamed plastic |
US4005239A (en) * | 1972-11-15 | 1977-01-25 | Formica Corporation | Decorative laminated panel and process for preparing the same |
US5365705A (en) * | 1991-06-07 | 1994-11-22 | Massachusetts Institute Of Technology | Roof panel design and single beam roof assembly |
-
2001
- 2001-01-03 WO PCT/US2001/000502 patent/WO2001049483A1/fr active Application Filing
- 2001-01-03 AU AU34418/01A patent/AU3441801A/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3637459A (en) * | 1970-03-17 | 1972-01-25 | Dow Chemical Co | Structural panel having foam plastic core |
US4005239A (en) * | 1972-11-15 | 1977-01-25 | Formica Corporation | Decorative laminated panel and process for preparing the same |
US3976526A (en) * | 1974-09-16 | 1976-08-24 | The Dow Chemical Company | Preparation of curved composite panel containing a rigid foamed plastic |
US5365705A (en) * | 1991-06-07 | 1994-11-22 | Massachusetts Institute Of Technology | Roof panel design and single beam roof assembly |
US5640812A (en) * | 1991-06-07 | 1997-06-24 | Massachusetts Institute Of Technology | Roof panel design and single beam roof assembly |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101830012A (zh) * | 2010-05-07 | 2010-09-15 | 广西大学 | 单板条双向定向重组木板及其制造方法 |
WO2014037286A1 (fr) * | 2012-09-07 | 2014-03-13 | Ed. Züblin Ag | Panneau de lames de bois multicouche |
GB2558215A (en) * | 2016-12-22 | 2018-07-11 | Gurit Uk Ltd | Cores for composite material sandwich panels |
GB2558215B (en) * | 2016-12-22 | 2019-05-29 | Gurit Uk Ltd | Cores for composite material sandwich panels |
BE1024499B1 (nl) * | 2017-01-04 | 2018-03-13 | Den Nieuwen Buiten Bvba | Een nieuw geïsoleerd bouwelement met kruisligging van de vezels en werkwijze voor gebruik daarvan |
EP3480385A3 (fr) * | 2017-01-04 | 2019-10-16 | Den Nieuwen Buiten BVBA | Nouvel élément de construction stratifié, croisé, isolé et son procédé d'utilisation |
Also Published As
Publication number | Publication date |
---|---|
AU3441801A (en) | 2001-07-16 |
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