ULTRA THICK BAMBOO-WOOD COMPOSITE PANEL, ULTRA THICK SOLID WOOD COMPOSITE PANEL AND MANUFACTURING METHODS THEREOF
First Claim
1. An ultra-thick wood/bamboo composite panel, comprising core board, surface board and back board, wherein said core board is composed of several ultra-thick peeling veneers with the thickness of 6 to 12 mm;
- both said surface board and said back board are made of bamboo;
the veneers of contiguous layer in said core board are assembled with parallel structure or cross structure;
said ultra-thick veneers constituting the core board are the veneers with stress degradation treatment, i.e. punctate or line segment cracks are formed along the grain of said veneer loose side in each layer;
a glue layer is arranged between contiguous said veneers.
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Accused Products
Abstract
The present invention provides ultra-thick bamboo/wood and solid wood composite panels, comprising core board, surface board and back board; said core board is composed of ultra-thick peeling veneers with the thickness of 6 to 12 mm, both said surface board and back board are made of bamboo or wood; said core board comprises several layers of said ultra-thick veneers, and the veneers of contiguous layer are assembled with parallel structure; glue layer is arranged between contiguous said veneers, the adhesive in the glue layer is the aqueous macromolecule isocyanate adhesive; said ultra-thick veneers of the core layer are the veneers with stress degradation treatment, i.e., punctate or line segment cracks are formed along the grain of said veneer loose side in each layer. The glue spread amounts of said composite panels are obviously less than that of the existing composite panels with the same thickness, and the composite panels are without warping or deformation. The present invention also provides the manufacturing method of the above composite panels.
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Citations
19 Claims
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1. An ultra-thick wood/bamboo composite panel, comprising core board, surface board and back board, wherein said core board is composed of several ultra-thick peeling veneers with the thickness of 6 to 12 mm;
- both said surface board and said back board are made of bamboo;
the veneers of contiguous layer in said core board are assembled with parallel structure or cross structure;
said ultra-thick veneers constituting the core board are the veneers with stress degradation treatment, i.e. punctate or line segment cracks are formed along the grain of said veneer loose side in each layer;
a glue layer is arranged between contiguous said veneers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- both said surface board and said back board are made of bamboo;
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8. A manufacturing method for ultra-thick wood/bamboo composite panel, comprising raw material preparation procedure, glue spreading procedure, assembling procedure, forming procedure and maintenance procedure,
(1) raw material preparation procedure wherein the raw material preparation procedure includes the preparation of bamboo, peeling of veneer, the stress degradation treatment of veneer, and the glue regulating, wherein, the preparation of bamboo includes the preparation of bamboo scrimber and the preparation of glued laminated bamboo; -
1.1 the bamboo is made into bamboo scrimber or glued laminated bamboo to be as surface board and back board; 1.2 the log is peeled into ultra-thick veneers with the thickness of 6 to 12 mm, punctate or line segment cracks are formed in the loose side of the veneer by stress degradation using stress degradation machine, after drying treatment, the moisture content of the veneer is in a range of 7 to 25%; 1.3 the adhesive used is aqueous macromolecule isocyanate adhesive, comprising main agent and cross linking agent, the main agent is styrene-butadiene latex, vinyl acetate-ethylene copolymer emulsion or polyacrylic acid emulsion, and the cross linking agent is polymerized isocyanate;
the amount of cross linking agent is from 5 to 20% of that of the main agent, after stirring uniformly, aqueous macromolecule isocyanate adhesive is formed;or, the adhesive used is resorcinol adhesive, comprising main agent and curing agent, the main agent is linear resorcinol resin containing alcohol, and the curing agent is polyformaldehyde;
the amount of polyformaldehyde is 8 to 15% of that of main agent, after stirring uniformly, resorcinol adhesive is formed;(2) glue spreading procedure wherein aqueous macromolecule isocyanate adhesive or resorcinol adhesive is spread uniformly on the surface of the stress degraded wood veneer and on the surface of bamboo scrimber or glued laminated bamboo;
the glue spread amount in each glue layer is from 80 to 300 g/m2 for aqueous macromolecule isocyanate adhesive, and the glue spread in each glue layer is from 150 to 300 g/m2 for resorcinol adhesive;(3) assembling procedure wherein the bamboo scrimber or glued laminated bamboo and the stress degraded veneer are assembled with parallel structure or cross structure, several said stress degraded veneers are assembled together to form the core board, bamboo scrimber or glued laminated bamboo are placed on the two sides of the core board so as to be used as surface board and back board, and then a slab is formed; (4) forming procedure wherein said slab is sent to cold pressing machine to cold press, the cold pressing pressure is in a range of 1 to 5 MPa, the cold pressing time is in a range of 20 to 60 min, and the cold pressing temperature is room temperature. - View Dependent Claims (9)
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10. A solid wood composite panel made of ultra-thick veneers, comprising surface layer of the two outer surfaces and core layer between the outer surfaces, and adhesive arranged between the veneers in each layer;
- wherein,
said core layer is composed of several ultra-thick veneers with the thickness of 6 to 12 mm, said surface layer is composed of veneers with the thickness of 0.2 to 1.5 mm; the ultra-thick veneers used in core layer are the veneers made by the peeling of log, and punctate or line segment cracks are formed in the direction along the grain of the loose side of the veneers. - View Dependent Claims (11, 12, 13, 14, 15)
- wherein,
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16. A manufacturing method for solid wood composite panel made of ultra-thick veneers, comprising the steps:
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A. veneers manufacture wherein the wood for making core layer veneers, is peeled into ultra-thick veneers with the thickness of 6 to 12 mm, and said veneers are untwined in the stress degradation equipment, punctate or line segment cracks being formed along the grain in the loose sides of the veneers, then the veneers are used as veneers for core layer; the wood for making surface board, is peeled into veneers with the thickness of 0.2 to 1.5 mm, then the veneers are used as decorative veneers for surface board; B. drying wherein the veneers are dried until the moisture content is in a range of 8 to 15%; C. glue spread wherein double-sided sizing is carried out on the ultra-thick veneers of the core layer, and gluing is not on the veneers of the surface layer; D. assembling wherein all said sizing ultra-thick veneers are assembled to form the core layer, and two thin veneers of the surface layer are assembled symmetrically on the upper and lower surface of the slab as vertical or interlaced to the wood grain of the core board; E. hot-pressing the slab is hot pressed to become one flesh. - View Dependent Claims (17, 18, 19)
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Specification