JP2010036359A - Wood-based material - Google Patents

Wood-based material Download PDF

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Publication number
JP2010036359A
JP2010036359A JP2008198546A JP2008198546A JP2010036359A JP 2010036359 A JP2010036359 A JP 2010036359A JP 2008198546 A JP2008198546 A JP 2008198546A JP 2008198546 A JP2008198546 A JP 2008198546A JP 2010036359 A JP2010036359 A JP 2010036359A
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Prior art keywords
adhesive
wood
mm
adhesive component
woody material
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JP2008198546A
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Japanese (ja)
Inventor
Koji Adachi
Masafumi Inoue
雅文 井上
幸司 足立
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Univ Of Tokyo
国立大学法人 東京大学
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Priority to JP2008198546A priority Critical patent/JP2010036359A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04Layered 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
    • B32B21/045Layered 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 natural rubber or synthetic rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04Layered 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
    • B32B21/08Layered 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 synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/28Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/283Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/40Layered products comprising a layer of synthetic resin comprising polyurethanes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00Compositions of lignin-containing materials
    • C08L97/02Lignocellulosic material, e.g. wood, straw or bagasse
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54Yield strength; Tensile strength
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558Impact strength, toughness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2471/00Floor coverings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2479/00Furniture
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00Walls, panels

Abstract

The present invention provides a wood material having high deformation performance and excellent design.
In a wood material in which wood is bonded with an adhesive, a static elastic modulus obtained by a predetermined procedure is 100 MPa or less in an adhesive portion 2 made of the adhesive formed between the woods 1. And at least one adhesive component selected from the group consisting of an adhesive component (A) having an elongation of 50% or more and an adhesive component (B) having an adhesive strength determined by a predetermined procedure of 1.20 N / 10 mm or more. A woody material 10 comprising:
[Selection] Figure 1

Description

  The present invention relates to a wood material.

Wood has an appearance peculiar to wood such as wood grain, and is a material excellent in design that gives an impression such as “warm”, “soft”, and “luxury”.
On the other hand, wood is also a material that is easily broken after bending yielding and difficult to be deformed flexibly compared to iron. The same applies to wood materials that are reconstructed by laminating various shapes of wood with adhesives, such as laminated wood, plywood or veneer laminate (LVL).

Conventionally, when a wood material is twisted or bent, it is common to use a processing method in which an adhesive is applied to wood and compression molded, and then softened by applying moisture and heat.
However, in this processing method, after moisture and heat are lost, the wooden material is solidified in a deformed state. Therefore, it has been desired to develop a wood material having a deformation performance that can be twisted and bent.

As a technology for imparting deformation performance to this wood material, it has flexibility and is unique to wood by a method in which a plurality of wood veneers and a plurality of sheet elastomers are laminated and bonded alternately in the thickness direction. A wood material that retains the decorative value is proposed (see Patent Document 1).
JP-A-7-68712

However, the laminate manufactured by the method described in Patent Document 1 has a volume ratio of 10% to 50% of the elastomer wood veneer, so that the ratio of the elastomer part appearing in the appearance of the laminate is sufficiently low. However, it was inferior in design.
Further, the laminate is still weak in flexibility, and cannot always exhibit deformation performance to the extent that it can be twisted or bent.

  This invention is made | formed in view of the said situation, Comprising: It aims at providing the woody material which has high deformation performance and was excellent in the designability.

As a result of intensive studies, the present inventors have found that the above-mentioned problems can be solved by laminating wood together using an adhesive containing a specific adhesive component, and have completed the present invention.
That is, the present invention is a wood material in which wood is bonded with an adhesive, and the static elastic modulus obtained by the procedure of the following (i) on an adhesive portion made of the adhesive formed between the woods. Is an adhesive component (A) having an elongation of 50% or more determined by the procedure (i) below and an adhesive strength of 1.20 N / 10 mm or more determined by the procedure (ii) below. A woody material characterized by containing at least one adhesive component selected from the group consisting of component (B).
(I) The static elastic modulus (normal state) and the elongation (normal state) are determined from the tensile stress-strain curve of the resin molding obtained in accordance with JIS-K7113 “Plastic Tensile Test Method”.
(Ii) The adhesive strength (normal state) is determined from the 180 ° peel test of the adhesive tape or adhesive sheet obtained in accordance with JIS-Z0237 “Adhesive tape / adhesive sheet test method”.

In the woody material of the present invention, the adhesive component (A) preferably contains modified silicon (a1-1) or silylated urethane (a1-2).
Moreover, in the woody material of this invention, it is preferable that the said adhesive component (A) contains rubber | gum (a2).
Moreover, in the woody material of this invention, it is preferable that the said adhesive component (B) contains an adhesive component (a3).
Moreover, in the woody material of this invention, it is preferable that the volume ratio with respect to the said wood of the said adhesion part is 50% or less.
Moreover, the woody material of the present invention is preferably a laminated body in which the plate-like woods are laminated in a layered manner via the adhesive part, and the volume ratio of the adhesive part to the wood is less than 10%. It is preferable that
Moreover, it is preferable that the wood material of this invention is what the said subdivided timber adhere | attached and integrated through the said adhesion part.

  According to the woody material of the present invention, high deformation performance can be exhibited and the design is excellent.

≪Wooden material≫
The woody material of the present invention is obtained by bonding wood with an adhesive.
FIG. 1 is a perspective view showing an embodiment of the wood material of the present invention.
The woody material 10 of the present embodiment is a laminate in which plate-like woods 1 are bonded together in layers via an adhesive part 2 made of an adhesive.

In the present invention, the “volume ratio” means the ratio of the volume of the whole wood to the volume of the wood material and the volume of the entire bonded portion, that is, (volume of the entire bonded portion) / (volume of the entire wood).
The volume ratio can be calculated from, for example, the total volume of wood in the cross section of the wooden material and the total volume of the bonded portion.
Moreover, in the case of a rectangular parallelepiped laminated body such as the woody material 10 of the present embodiment, it can be calculated from the total volume of wood on the side of the laminated body and the total volume of the bonded portion.

In the woody material of the present invention, the volume ratio of the bonded portion to the wood is preferably 50% or less, more preferably 20% or less, and particularly preferably 5% or less.
When the volume ratio is 50% or less, the appearance ratio of the adhesive portion is low on the appearance of the wood material, the portion where the wood can be seen is increased, the decorative features peculiar to wood are sufficiently provided, and the design property is excellent. Become a thing.
The lower limit of the volume ratio is preferably 0.5% or more and more preferably 1% or more because the adhesive force between the woods is further improved.

  In the woody material 10 of the present embodiment, the volume ratio of the bonded portion 2 to the wood 1 is preferably less than 10%, more preferably 1% or more and less than 10%, and more preferably 1 to 5%. It is particularly preferred. When the volume ratio is not more than the upper limit of the volume ratio, the decorative features peculiar to wood are sufficiently provided and the design is excellent. On the other hand, when it is at least the lower limit value, the adhesive force between the woods 1 is further improved.

(wood)
For the wood 1, for example, a tree of material cut out from a conifer or a hardwood is used.
The shape of the wood 1 is not particularly limited, and a shape suitable for various applications such as a shaft material and a surface material can be used.
The wood 1 preferably has a shape with low bending rigidity because higher deformation performance can be easily obtained. For example, a veneer, a lace veneer, a strand, a subdivided wood chip and the like are preferable. It is done.

(Adhesive part)
The bonding part 2 is made of an adhesive and is formed between the woods 1.
In the woody material 10 of the present embodiment, the adhesive portion 2 is an adhesive layer formed between the opposing woods 1 and 1 and bonds the woods 1 to each other.

-Adhesive component In the woody material of the present invention, the bonded portion has a static elastic modulus of 100 MPa or less determined by the following procedure (i) and an elongation determined by the following procedure (i) of 50%. It contains at least one adhesive component selected from the group consisting of the above adhesive component (A) and the adhesive component (B) having an adhesive strength determined by the procedure of (ii) below of 1.20 N / 10 mm or more.
(I) The static elastic modulus (normal state) and the elongation (normal state) are determined from the tensile stress-strain curve of the resin molding obtained in accordance with JIS-K7113 “Plastic Tensile Test Method”.
(Ii) The adhesive strength (normal state) is determined from the 180 ° peel test of the adhesive tape or adhesive sheet obtained in accordance with JIS-Z0237 “Adhesive tape / adhesive sheet test method”.
That is, the woody material of the present invention has a low-elasticity or high-viscosity adhesive part between woods.
In the present invention, the “adhesive component” means a component having an effect of adhering wood to each other, and a synthetic product or a natural product such as a synthetic resin or a synthetic rubber contained in an adhesive (including an adhesive); After application of the agent, those solidified by evaporation of water or solvent, cured products after reaction, heated melts, and the like are included.

.. Adhesive component (A) The static elastic modulus of the adhesive component (A) is 100 MPa or less, preferably 50 MPa or less, and more preferably 10 MPa or less. When the static elastic modulus is 100 MPa or less, it is easy to be deformed with respect to a load and a restoring force is more easily generated.
The lower limit value of the static elastic modulus is preferably 0.1 MPa or more and more preferably 1 MPa or more because it is necessary to maintain the form of the wood material.

The elongation of the adhesive component (A) is 50% or more, preferably 75% or more, and more preferably 100% or more. When the elongation is 50% or more, it becomes easier to deform with respect to a load.
The elongation is preferably as large as possible, and the upper limit is preferably 1000% or less, and more preferably 500% or less.

Specifically, the static elastic modulus (normal state) and the elongation (normal state) are obtained as follows.
(I-1) The adhesive component (A) was subjected to a tensile test described in JIS-K7113 under the conditions of a temperature of 23 ± 2 ° C., a relative humidity of 50 ± 5%, and a deformation rate of 50 mm / min, and is shown in FIG. A tensile stress-strain curve of such a resin molded body is obtained (FIG. 2: 2007 edition JIS Handbook, Plastic I, page 333).
(I-2) The static elastic modulus (normal state) of the adhesive component (A) is calculated by the following equation using the first linear portion (auxiliary line for tensile elastic modulus) of the tensile stress-strain curve.
Static elastic modulus (MPa) = (Stress difference due to original average cross-sectional area between two points on a straight line (MPa)) / (Strain difference between the same two points)
(I-3) The elongation (normal state) of the adhesive component (A) is calculated by the following formula.
Elongation (%) = (Distance between marked lines at break (mm) −Original distance between marked lines (mm)) / Original distance between marked lines (mm) × 100

In the present invention, the adhesive component (A) has a static elastic modulus of 100 MPa or less and an elongation of 50% or more, and examples thereof include a low elastic polymer compound.
Specific examples of the low elastic polymer compound include modified silicon (a1-1), silylated urethane (a1-2), and rubber (a2).

In the present invention, “modified silicone (modified silicone)” means a substance in which a part of dimethylpolysiloxane as a main base polymer is substituted with an organic group. For example, an organic group introduced into the side chain of dimethylpolysiloxane (side chain type), an organic group introduced into one end of the main chain of dimethylpolysiloxane (one end type), both ends of the main chain Organic groups introduced into the two groups (both ends type), organic groups introduced into one end of the side chain and main chain (side chain one end type), organic groups at both ends of the side chain and main chain Introduced ones (both side chain end type) are included.
The organic group is not particularly limited, and may be a reactive group or a non-reactive group. For example, —R′NH (amino-modified), epoxy group (epoxy-modified), —R ′. OH (carbinol-modified), - R '(C 2 H 4 O) p (C 3 H 6 O) q H ( polyether-modified), - R'COOH (carboxyl-modified); alkyl group, a phenyl group, -R '(C 2 H 4 O) p (C 3 H 6 O) q R ″ (polyether-modified) (R ′ and R ″ each represent a hydrocarbon group, and p and q each represent the number of repetitions). Can be mentioned.

In the present invention, “silylated urethane” means a product in which an isocyanate terminal of a urethane prepolymer is modified with a silyl group.
Examples of the group introduced by silyl group modification include an alkoxysilyl group.

  Examples of the rubber (a2) include chloroprene rubber, styrene-butadiene rubber (SBR), butyl rubber, natural rubber, silicone rubber, and acrylic rubber. Of these, chloroprene rubber is preferable.

.. Adhesive component (B) The adhesive strength of the adhesive component (B) is 1.20 N / 10 mm or more, preferably 1.60 N / 10 mm or more, more preferably 2.40 N / 10 mm or more. . When the adhesive force is 1.20 N / 10 mm or more, the adhesive force is easily deformed with respect to a load, and a restoring force is more easily generated.
The upper limit value of the adhesive force is preferably 50 N / 10 mm or less, and preferably 25 N / 10 mm or less because the volume ratio (ratio of the volume of the entire bonded portion in the wood material) increases as the adhesive force increases. More preferably.

Specifically, the adhesive strength (normal state) is determined as follows.
(Ii-1) The adhesive component (B) is subjected to a 180-degree peeling adhesion test described in JIS-Z0237 under the conditions of a temperature of 23 ± 2 ° C. and a relative humidity of 50 ± 5%, and the adhesion strength is measured. .

In the present invention, the adhesive component (B) has a pressure-sensitive adhesive strength of 1.20 N / 10 mm or more, and examples thereof include a highly adhesive polymer compound.
Specific examples of the highly adhesive polymer compound include an adhesive component (a3).

In the present invention, “adhesive component” means a component having sticky properties. In a test method based on JIS Z1528 “double-sided adhesive tape”, a component having an adhesive strength (normal state) of 1.20 N / 10 mm or more is used. Say.
Examples of the adhesive component (a3) include acrylic resins such as acrylic acid ester copolymers and natural rubber, among which acrylic resins are preferable.
In the present invention, the “acrylic ester copolymer” is a kind of acrylic resin, and an acrylic acid monomer is copolymerized with an acrylic ester to strengthen the interface by introducing a polar group and improve cohesion by hydrogen bonding. What is intended is mentioned as a suitable one.

In the woody material of the present invention, the adhesive portion may contain one type of adhesive component or two or more types of adhesive components.
Among the above, as the adhesive component, the deformation performance is higher and the adhesiveness between the woods is good, so that the modified silicon (a1-1), silylated urethane (a1-2), rubber (a2) and It preferably contains at least one adhesive component selected from the group consisting of adhesive components (a3), and is selected from the group consisting of modified silicon (a1-1), rubber (a2) and adhesive component (a3). More preferably, it contains at least one adhesive component.

  Further, the adhesive component is a solidified adhesive that constitutes an adhesive part, a cured product after reaction, a heated melt, or the like, and the static elastic modulus is 100 MPa or less and the elongation is 50. % Or more; solidified adhesive that constitutes an adhesive part, cured product after reaction or heated melt, etc., and those having the above adhesive strength of 1.20 N / 10 mm or more.

  The manufacturing method of the woody material 10 of the present embodiment is not particularly limited. For example, a predetermined amount of adhesive is applied to one surface of the facing wood by spraying or the like (adhesive). There is a manufacturing method in which a double-sided tape to be applied is assigned and pasted according to the size of the wood, laminated so as to have a predetermined thickness, and a pressing operation is performed while heating if necessary.

  The adhesive forming the adhesive part 2 contains at least one adhesive component selected from the group consisting of the adhesive component (A) and the adhesive component (B), and includes other components as necessary. You may go out. Alternatively, after applying to wood, the adhesive strength is 1.20 N after applying to wood or an adhesive that forms the adhesive part 2 having the static elastic modulus of 100 MPa or less and the elongation of 50% or more. The adhesive which forms the adhesion part 2 which becomes / 10mm or more may be sufficient.

  Adhesives containing modified silicon (a1-1) as the adhesive component (A) are, for example, Super X (trade name, containing acrylic modified silicone resin) manufactured by Cemedine Co., Ltd., PM100 (commercial product) manufactured by Cemedine Co., Ltd. Name, containing modified silicone resin), PM155 manufactured by Cemedine Co., Ltd. (trade name, containing modified silicone resin), PM165 manufactured by Cemedine Co., Ltd. (trade name, containing epoxy-modified silicone resin), Cemedine Co., Ltd. PM200 (trade name, main agent: epoxy resin, curing agent: containing modified silicone resin), EP001 (trade name, main agent: epoxy resin, curing agent: containing modified silicone resin) manufactured by Cemedine Co., Ltd., Konishi ( Bond EX Clear (trade name, containing modified silicone resin) manufactured by Co., Ltd., Bond MPX-1 (trade name, modified by Konishi Co., Ltd.) It includes those commercially available silicone resin-containing), and the like.

  The adhesive containing silylated urethane (a1-2) as the adhesive component (A) is, for example, Bond SU200 Gray (trade name, containing silylated urethane resin) manufactured by Konishi Co., Ltd., Bond manufactured by Konishi Co., Ltd. Commercially available products such as SU Super Clear (trade name, containing silylated urethane resin), Bond Ultra Multipurpose SU (trade name, containing silylated urethane resin) manufactured by Konishi Co., Ltd., and the like can be mentioned.

  Examples of the adhesive containing rubber (a2) as the adhesive component (A) include 575 (trade name, containing chloroprene rubber) manufactured by Cemedine Co., Ltd., and Bond G103 (trade name, nitrile rubber) manufactured by Konishi Co., Ltd. ), Konishi Co., Ltd. Bond G Clear (trade name, containing SBR rubber), Konishi Co., Ltd. Z2 (trade name, containing SBR rubber), Konishi Co., Ltd. Bond G10Z (trade name) , Containing chloroprene rubber), Bond G17Z manufactured by Konishi Co., Ltd. (trade name, containing chloroprene rubber), 55 manufactured by Sumitomo 3M Co., Ltd. (containing trade name, acrylic rubber), manufactured by Sumitomo 3M Co., Ltd. Commercially available products such as 111 (trade name, containing chloroprene rubber) can be used.

Examples of the adhesive containing the adhesive component (a3) as the adhesive component (B) include a tape formed using an acrylic adhesive, and specifically, 5601 (trade name, manufactured by Nitto Denko Corporation). , Tape with acrylic adhesive applied to both sides of polyester substrate), 500, 510, 512 manufactured by Nitto Denko Corporation (both trade names, tapes with acrylic adhesive applied to both sides of nonwoven fabric) , 5010 manufactured by Nitto Denko Corporation (trade name, tape with an acrylic adhesive coated on both sides of a polyester base), J1310 manufactured by Nitoms Co., Ltd. (trade name, acrylic adhesive on both sides of a polyethylene base) Tape with the adhesive applied), J0700 manufactured by Nitoms Co., Ltd. (trade name, tape with acrylic adhesive applied to both sides of the paper substrate), Y4914 (trade name, A Tape with acrylic adhesive applied on both sides of the Lilfoam substrate), Sumitomo 3M Limited 4597 (trade name, tape with acrylic adhesive applied on both sides of the polyester substrate), Sumitomo 3M Ltd. 950, 465, and 468MP (all are trade names, tapes made only of an acrylic adhesive).
In the present invention, “acrylic pressure-sensitive adhesive” refers to a pressure-sensitive adhesive containing an acrylic resin as a main agent.

The woody material 10 of this embodiment always has a high deformation performance that can be twisted and bent. In addition, the wood material 10 has a low appearance ratio of the bonded portion 2 in appearance, has many portions where the wood 1 can be seen, has sufficient decorative features peculiar to wood, and is excellent in design.
The reason why such an effect can be obtained is estimated as follows.
In general, wood in an air-dried state has a small tensile fracture strain, and the shear strength at the fiber running surface is inferior to the compression / tensile strength. Therefore, the conventional woody material obtained by bonding the wood with an adhesive exhibits mechanical properties close to that of the wood and is difficult to be deformed more flexibly than the wood itself. In addition, in order to impart deformation performance to wood materials, for example, sheet-like elastomers that have been placed between woods, for example, do not strongly bond wood to each other and require a certain amount of thickness. Therefore, it cannot be said that the ratio of the elastomer part appearing in the appearance is sufficiently low, and the design is poor.
On the other hand, the woody material 10 of the present embodiment includes at least one adhesive component selected from the group consisting of the adhesive component (A) and the adhesive component (B) between the woods 1. Have Since the bonding portion 2 has a low elasticity or high viscosity property, it easily deforms against a load and generates a restoring force. Thereby, it is thought that the wooden material 10 has high deformation | transformation performance.
In addition, the adhesive containing at least one adhesive component selected from the group consisting of the adhesive component (A) and the adhesive component (B) can bond the woods 1 with each other, and further has an adhesive strength. Because it is strong, it can be used in small quantities. Thereby, since the thickness of the adhesion part 2 can be made thin, it is thought that it is excellent in design property.
That is, the woods 1 are bonded to each other via the bonding part 2 having a low elasticity or high viscosity property, and the wood 1 is not subjected to a large tensile strain, and the bonding part 2 is largely subjected to the strain, thereby making the woody It is estimated that large deformation is possible in the entire material 10.

The wood material of the present invention is not limited to the wood material 10 shown in FIG. 1, and may be, for example, as shown in FIGS. 3 (a) to 3 (b).
The wood material 10 shown to Fig.3 (a) is the cylindrical laminated body by which the timbers 1 were bonded together in the layer form through the adhesion part 2 which consists of an adhesive agent.
A wood material 10 shown in FIG. 3 (b) is obtained by bonding and subdividing, for example, wood pieces 1 such as wood chips into a columnar shape via an adhesive portion 2.
Since the wooden material 10 shown in FIG. 3 (a) is cylindrical, it can be twisted or bent in any direction and has a remarkably high deformation performance.
Since the wood material 10 shown in FIG. 3B uses subdivided wood, it has a higher deformation performance than that shown in FIG.
The woody material 10 shown in FIGS. 3 (a) to 3 (b) also has an appearance that can reduce the rate of appearance of an adhesive part, has many visible parts of wood, and has sufficient decorative features unique to wood for design. It is excellent.
The wooden material 10 shown in FIG. 3A can be manufactured, for example, by preparing a laminate by a manufacturing method similar to the wooden material shown in FIG. 1 and processing it into a cylindrical shape.
The woody material 10 shown in FIG. 3 (b) can be manufactured by, for example, mixing the subdivided wood 1 and an adhesive, and compression-molding it into a cylindrical shape.
As described above, in the woody material of the present invention, the raw material wood can be appropriately reconstructed into a shaft material or a surface material using an adhesive.

Since the wood material of the present invention exhibits high shear deformation at the bonding portion, it exhibits flexibility even in a region exceeding the fracture strain of the wood material bonded with the conventional wood adhesive, Good resilience against shear deformation. As a result, it is possible to design woody materials such as single-plate laminates and laminated woods that are rich in low elasticity, high toughness, and plasticity.
In addition, the toughness of the woody material of the present invention can be widely controlled by the combination of adhesives and the selection of adhesive components.
In addition, the woody material of the present invention is easily deformed by the strength and weight of the hand, and the "soft" woody material that can be experienced not only by the appearance of the wood, but also by the actual feeling of the "soft" that ordinary people hold on the wood. Material ".

Furthermore, the woody material of the present invention is excellent in reproducibility (repetitive fatigue characteristics) and impact absorption performance with respect to repeated loads in addition to deformation performance and designability. For example, if a reactive crosslinking agent is added to an acrylic adhesive, the adhesive layer (adhesive part) can be cured by applying ultraviolet rays or heat after the wood material is deformed. It is also possible to obtain a wood material having various shapes and maintaining the shapes.
In this way, the wood material of the present invention can be developed in many fields because it can express new functions that could not be realized with conventional wood materials, and it also opens up new ways to use wood. It is.

  Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

The wood and adhesive used in this example are as follows.
(wood)
Nara: A veneer with a thickness of 1.0 mm (width 100 mm × length 300 mm, width 100 mm × length 500 mm). Total dry density 0.61 g / cm 3 .
Sugi: Veneer with a thickness of 0.5 mm (width 100 mm × length 300 mm, width 100 mm × length 500 mm). Total dry density 0.28 g / cm 3 .
Solid wood: 20mm thick (width 100mm x length 500mm).

(adhesive)
PF: Adhesive component Phenolic resin (static elastic modulus 4 GPa, elongation 2%), trade name “PL-3690”, manufactured by Gunei Chemical Industry Co., Ltd.
EP: Adhesive component Epoxy resin, trade name “E set”, manufactured by Konishi Co., Ltd.
AC: Adhesive component Vinyl acetate resin, trade name “CH-18”, manufactured by Konishi Co., Ltd.
SR: Adhesive component (A) Modified silicon, trade name “Super X”, manufactured by Cemedine Co., Ltd.
CR: Adhesive component (A) Chloroprene rubber, trade name “575”, manufactured by Cemedine Co., Ltd.
DST: Adhesive component (B) (adhesive component) acrylic resin (adhesive strength 10.7 N / 20 mm), trade name “5010”, manufactured by Nitto Denko Corporation; acrylic on both sides of a polyethylene substrate with a thickness of 0.04 mm Tape coated with adhesive.
AAT: Adhesive component (B) (adhesive component) Acrylic resin (adhesive strength 2.7 N / cm), trade name “8142”, manufactured by Sumitomo 3M Limited; tape consisting only of acrylic adhesive.

  In the adhesive, the static elastic modulus and elongation of the adhesive component were determined according to the procedure (i) described above. The adhesive strength was quoted from a product data sheet (compliant with JIS-Z0237 “Testing method for adhesive tape and adhesive sheet”).

(Examples 1-13, Comparative Examples 1-9)
[Manufacture of specimens]
A test body (single plate laminate) having the same form as the wood material 10 shown in FIG. 1 was produced as follows.
For DST and AAT, a tape was assigned and pasted on one surface of the facing wood according to the wood dimensions, and for the other adhesives, an application amount of 100 g / m 2 was applied.
And it laminated | stacked so that the thickness of the test body after lamination | stacking might be set to 15 mm and 20 mm, and the wood was adhere | attached by performing pressing operation, respectively, and produced the laminated body.
In the pressing operation, after lamination, in the example using PF, hot pressing was performed at 140 ° C. and 40 seconds / mm. About the example using another adhesive agent, it heat-cured at 40 degreeC and 40 second / mm, respectively.
Thereafter, the obtained laminate was cut into a size of thickness 15 mm × width 15 mm × length 300 mm, thickness 20 mm × width 20 mm × length 400 mm, thickness 15 mm × width 15 mm × length 15 mm. A test body (single plate laminate) was produced.
The details of the obtained specimen are shown in Table 1.
The volume ratio (%) is obtained by actually measuring the total thickness of each of the wood and the adhesive part (adhesive layer) in the thickness direction of the specimen, and the total thickness of the adhesive part (adhesive layer). Was divided by the total thickness of the wood.

  From Table 1, it can be confirmed that all of the test bodies of Examples 1 to 13 have sufficient decorative features unique to wood and are excellent in design because there are almost no adhesive portions in appearance. It was.

  The specimens of the above examples were subjected to the following mechanical performance evaluations, that is, a static bending test, a repeated bending test, an impact bending test, and a lateral compression test.

(Static bending test, repeated bending test)
The static bending test and the repeated bending test were performed by a central concentrated load method, using a universal testing machine, setting a load speed of 5 mm / min and a span of 240 mm, and applying a load direction to the wood as flatwise.
In the static bending test, the specimens of Comparative Examples 1 to 3 and Examples 1 to 5 were used as specimens. Note that a single plate bundle in which only 15 pieces of wood (single plate) were stacked without using an adhesive was used as a control (Test Example 1).
The evaluation results of the static bending test are shown in FIGS. 4 to 6 and Table 2 (FIG. 4, Table 2: Evaluation of static bending performance) (FIGS. 5 to 6: Evaluation of deformation behavior under static bending load). .
The “density (g / cm 3 )”, “bending Young's modulus MOE (GPa)”, “bending strength MOR (MPa)”, and “bending work (J)” shown in Table 2 are all static bending tests. It is the characteristic about the test body determined by performing. In the table, "-" indicates that the specimen was unbroken with a deflection of 40 mm at the center of the span.
In the repeated bending test, the specimen of Example 3 was used. The evaluation results are shown in FIG. 9 (evaluation of response to repeated load).

(Impact bending test)
The impact bending test was performed by a central concentrated load method using a Charpy type tester having a capacity of 98.0 J, setting a span of 240 mm, and applying a load direction to the wood as flatwise.
In the impact bending test, those of Comparative Examples 4 to 6 and Examples 6 to 9 were used as test specimens, respectively. Note that a single plate bundle in which 20 pieces of wood (single plate) were stacked without using an adhesive was used as a control (Test Example 2; Cont.). A solid material having the same size (thickness 20 mm × width 20 mm × length 400 mm) was used as Test Example 3.
The evaluation results of the impact bending test are shown in FIGS. 7 to 8 (evaluation of impact absorption energy).

(Lateral compression test)
In the lateral compression test, a universal testing machine was used, the load speed was set to 2 mm / min, lateral compression was applied in the thickness (lamination) direction, and measurement was performed up to 10% compression strain.
About the horizontal compression test, the thing of Comparative Examples 7-9 and the thing of Examples 10-13 were used for the test body, respectively.
The evaluation results of the lateral compression test are shown in FIG. 10 (evaluation of lateral compression characteristics).

  In this embodiment, “span central deflection” means the amount of change in the position of the span central portion of the specimen before and after the load is applied to the specimen. For example, “Example 5—Deflection 60 mm” in FIG. The distance L shown in the figure corresponding to. In this figure, it means that the distance L is a deflection of 60 mm.

[Evaluation of static bending performance]
FIG. 4 is a graph showing the relationship between the load and the deflection at the center of the span, obtained for the test body according to this example.
From the graph shown in FIG. 4, the specimens of Examples 1 to 4 using SR, CR, DST, and AAT as the adhesive are deformed immediately when a load is applied, and the center portion of the span is bent. It can be seen that the deformation is less than 20 mm and the deflection is 20 mm or more (for Example 3 and Example 4, the load is 100 N or less and the deflection is 40 mm or more).
On the other hand, the specimens of Comparative Examples 1 to 3 using PF, EP, and AC as the adhesive have a small deflection at the center of the span even when a load is applied, and all break at a load of 700 N or more and a deflection of less than 10 mm. Was confirmed.

  Table 2 is a table | surface which shows each characteristic value regarding the bending performance obtained about the test body which concerns on a present Example.

From the results of Table 2, it can be seen that the specimens of Examples 1 to 4 have significantly lower bending Young's modulus MOE than the specimens of Comparative Examples 1 to 3.
In both cases, a difference was observed in the bending Young's modulus MOE, but it was confirmed that there was almost no difference in the amount of bending work.

[Evaluation of deformation behavior under static bending load]
FIG. 5 is a diagram showing the deformation behavior under the static bending load obtained for the test body according to this example.
In FIG. 5, “20% reduction in load” means the time when a load lower by 20% of the maximum load than the maximum load is applied after the test body continues to apply a load and the test body breaks.
From the figure shown in FIG. 5, the test bodies of Examples 1 to 3 and 5 using SR, CR and DST as the adhesive are compared with the test bodies of Comparative Examples 2 and 3 using EP and AC as the adhesive. It can be seen that there is a large deflection at the center of the span and a high deformation performance.

FIGS. 6A to 6B are diagrams showing deformation behaviors in the vicinity of an applied point under a static bending load, respectively, obtained for a test body according to this example.
Fig.6 (a) is a figure which shows the deformation | transformation behavior near the applied point in the maximum load of the test body of Example 1 which used SR as an adhesive agent.
FIG.6 (b) is a figure which shows the deformation | transformation behavior near the applied point at the time of applying the maximum load to the test body of the comparative example 3 which used AC as an adhesive agent.
From the figure shown in FIG. 6 (a), in the test body of Example 1, the bonded portion is stretched and deformed, and the single plates facing each other through the bonded portion are kept in contact with each other while maintaining the bonding with the bonded portion. (This is suggested by the fact that the vertical line on the side of the specimen is almost parallel to the direction of force). This deformation behavior was confirmed to be the same in the other test samples of Examples 2 to 4 using CR, DST, and AAT. By exhibiting such deformation behavior, the woody material of the present invention is considered to have high deformation performance.
From the diagram shown in FIG. 6 (b), it can be seen that in the test body of Comparative Example 3, the bonded portion is not deformed, and the single plates facing each other through the bonded portion rarely slide together. This is suggested by the fact that the vertical line on the side of the specimen is not parallel to the direction of force). This deformation behavior was confirmed to be the same in the other test samples of Comparative Examples 1 and 2 using PF and EP.

[Evaluation of shock absorption energy]
FIG. 7 is a graph showing the impact absorption energy obtained for the test body according to this example.
From the graph shown in FIG. 7, the specimens of Examples 6 to 9 using SR, CR, DST, and AAT as adhesives are the specimens of Comparative Examples 4 to 6 using PF, EP, and AC as adhesives. It can be seen that the impact absorption energy is higher than
On the other hand, it was confirmed that the specimens 4 to 6 of the comparative example were of the same level or lower than the impact absorption energy exhibited by the solid material of the test example 3.

FIGS. 8A to 8B are diagrams each showing a fracture shape of each specimen in the evaluation of the shock absorption energy according to the present example.
From the diagram shown in FIG. 8 (a), in the specimens of Examples 6 to 9, it was confirmed that in addition to tensile fracture, shear fracture between layers such as separation of the veneer and the adhesive portion occurred. It was. Thereby, it is thought that this test body has high impact absorption energy. Moreover, it is thought that this test body is excellent also in a shock absorptivity and a sound absorption property by having high impact absorption energy.
From the diagram shown in FIG. 8 (b), it was confirmed that in the specimens 4 to 6 of the comparative example, most of the fractures that occurred were tensile fractures, and almost no interlaminar shear fractures were observed.

[Evaluation of response to repeated load]
FIGS. 9A to 9C are graphs showing the relationship between the load and the deflection at the center of the span when the number of bending loads is changed, obtained for the specimen of Example 3. FIG.
9A to 9C, in this order, the maximum load applied to the center of the span of the test specimen increases, and the deflection of the center of the span increases accordingly (the maximum radius of curvature is 225 mm). In either case, the same bending test was repeated five times.
From each of the graphs shown in FIGS. 9A to 9C, the test piece of Example 3 is repeated because the fifth curve draws almost the same curve as the other number of curves. It can be seen that the reproducibility (repetitive fatigue characteristics) with respect to the load is excellent.

[Evaluation of lateral compression characteristics]
FIG. 10 is a graph showing the relationship between the compressive stress and the compressive strain at the time of lateral compression obtained for the test body according to this example.
From the graph shown in FIG. 10, the specimens of Examples 10 to 13 using SR, CR, DST, and AAT as adhesives are the specimens of Comparative Examples 7 to 9 using PF, EP, and AC as adhesives. It can be seen that the compressive stress relative to the compressive strain is lower than

Table 3 is a table | surface which shows each characteristic value regarding the mechanical performance obtained about the test body which concerns on a present Example. In the table, “-” indicates that the deflection of the center portion of the span is 40 mm, and the specimen was unbroken (same as in Table 2).
“Shock absorption energy (J / cm 2 )” listed in Table 3 is determined by performing an impact bending test, and “lateral compression modulus (GPa)” is determined by performing a lateral compression test. It is the characteristic about.

From the results of Table 3, it can be seen that the test specimens of Examples using SR, CR, and AAT as the adhesive exhibit high deformation performance.
With static bending work, no difference was observed between the adhesives.
The test specimens of Examples using SR, CR, and AAT as adhesives showed superiority in impact absorption energy compared with the test specimens of Comparative Examples using PF, EP, and AC as adhesives. I understand.
In addition, the test specimens of the examples using SR, CR, and AAT as the adhesive have lower transverse compression elastic modulus and yield stress than the test specimens of the comparative examples using PF, EP, and AC as the adhesive. It was confirmed that
From the above results, a single-plate laminated material (woody material) in which woods are bonded together via an adhesive part having low elasticity or high viscosity has high deformation performance and excellent design properties. Was confirmed.

  The woody material of the present invention has a large capital investment, etc., except that the adhesive part uses an adhesive containing at least one adhesive component selected from the group consisting of the adhesive component (A) and the adhesive component (B). It is not necessary and can be manufactured by applying the same process as the manufacturing process of the conventional woody material. In addition, the wood material of the present invention includes, for example, (1) housing joints: wood bolts (non-breakable wooden bolts), etc .; (2) furniture: a total wooden ultra-universal design chair and the back of the bed The seating surface and backrest are deformed according to the body shape.), Cushioning material, flooring material, etc .; (3) Shock absorption / sound absorbing material: guardrail, soundproof wall, seismic isolation material, for infants and the elderly Wooden shock-absorbing floors, stairs, etc. (4) Personal accessories: hangers (shoulders bend according to the weight of clothes), shoes / footwear (follows the movement of the soles), bags and doors It can be used in many fields, such as handles, shoulder pads, lighting fixture arms, interior miscellaneous goods, etc .; (5) Fitness: Expanders, etc. (6) Educational materials: Teaching materials for school crafts and technical departments.

It is a perspective view showing one embodiment of the woody material of the present invention. It is a graph which shows an example of the tensile stress-strain curve of the resin molding obtained about the adhesive component (A). FIGS. 3A and 3B are perspective views showing other embodiments of the wood material of the present invention. It is a graph which shows the relationship between the load and the deflection | deviation of the span center part which were obtained about the test body which concerns on a present Example. It is a figure which shows the deformation | transformation behavior under the static bending load obtained about the test body which concerns on a present Example. FIGS. 6A to 6B are diagrams showing deformation behaviors in the vicinity of an applied point under a static bending load, respectively, obtained for a test body according to this example. It is a graph which shows the impact absorption energy obtained about the test body which concerns on a present Example. FIGS. 8A to 8B are diagrams each showing a fracture shape of each specimen in the evaluation of the shock absorption energy according to the present example. FIGS. 9A to 9C are graphs showing the relationship between the load and the deflection at the center of the span when the number of bending loads is changed, obtained for the specimen of Example 3. FIG. It is a graph which shows the relationship between the compressive stress at the time of lateral compression and the compressive strain obtained about the test body which concerns on a present Example.

Explanation of symbols

  1 Wood 2 Bonding part 10 Wood material

Claims (8)

  1. In woody material where wood is bonded with an adhesive,
    In the adhesive part made of the adhesive formed between the woods,
    The static elastic modulus obtained by the procedure (i) below is 100 MPa or less, and the elongation obtained by the procedure (i) below is 50% or more and the procedure (ii) below. A wood material comprising at least one adhesive component selected from the group consisting of adhesive components (B) having an adhesive strength of 1.20 N / 10 mm or more determined in this way.
    (I) The static elastic modulus (normal state) and the elongation (normal state) are determined from the tensile stress-strain curve of the resin molding obtained in accordance with JIS-K7113 “Plastic Tensile Test Method”.
    (Ii) The adhesive strength (normal state) is determined from the 180 ° peel test of the adhesive tape or adhesive sheet obtained in accordance with JIS-Z0237 “Adhesive tape / adhesive sheet test method”.
  2.   2. The woody material according to claim 1, wherein the adhesive component (A) contains modified silicon (a1-1) or silylated urethane (a1-2).
  3.   The woody material according to claim 1, wherein the adhesive component (A) contains rubber (a2).
  4.   The wood material according to claim 1, wherein the adhesive component (B) includes an adhesive component (a3).
  5.   The woody material according to any one of claims 1 to 4, wherein a volume ratio of the adhesive portion to the wood is 50% or less.
  6.   The woody material according to any one of claims 1 to 5, which is a laminated body in which the plate-like woods are laminated in a layered manner via the adhesive portion.
  7.   The woody material according to claim 6, wherein a volume ratio of the bonded portion to the wood is less than 10%.
  8.   The woody material according to any one of claims 1 to 5, wherein the subdivided pieces of wood are bonded and integrated through the bonding portion.
JP2008198546A 2008-07-31 2008-07-31 Wood-based material Pending JP2010036359A (en)

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03278903A (en) * 1990-03-28 1991-12-10 Tatsuta Electric Wire & Cable Co Ltd Adhesive sheet for plywood
JPH04247901A (en) * 1991-01-18 1992-09-03 Okura Ind Co Ltd Vibration damping plywood
JPH05163476A (en) * 1991-12-11 1993-06-29 Cemedine Co Ltd Method for bonding material treated with antiseptic agent and/or ant preventing agent
JPH10133654A (en) * 1996-10-29 1998-05-22 Yamaha Corp Stringed instrument type playing device
JPH10143139A (en) * 1996-11-11 1998-05-29 Yamaha Corp Keyboard musical instrument
JP2000239645A (en) * 1998-08-24 2000-09-05 Sekisui Chem Co Ltd Adhesive for modified silicone interior decoration material and adhering method for interior decoration material
JP2000265646A (en) * 1999-03-19 2000-09-26 Sekisui Chem Co Ltd Floor component
JP2003055637A (en) * 2001-08-10 2003-02-26 Kao Corp Adhesive for lignocellulose
JP2003293556A (en) * 2002-03-29 2003-10-15 Sekisui Chem Co Ltd Execution method for wood-based interior finishing material, wood-based interior finishing material and double-faced tape
JP2005154744A (en) * 2003-11-06 2005-06-16 Denki Kagaku Kogyo Kk Chloroprene rubber adhesive and its manufacturing method
JP2005179677A (en) * 2003-12-19 2005-07-07 Bayer Material Science Llc Two-component silylated polyurethane adhesive, sealant, and coating composition
JP2005314705A (en) * 2004-04-28 2005-11-10 Bayer Material Science Llc Moisture-curable polyether urethane and its use in sealant composition, adhesive composition and coating composition
JP2006317727A (en) * 2005-05-13 2006-11-24 Takatsuki Seikei Kk Sound absorption board and its manufacturing method

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03278903A (en) * 1990-03-28 1991-12-10 Tatsuta Electric Wire & Cable Co Ltd Adhesive sheet for plywood
JPH04247901A (en) * 1991-01-18 1992-09-03 Okura Ind Co Ltd Vibration damping plywood
JPH05163476A (en) * 1991-12-11 1993-06-29 Cemedine Co Ltd Method for bonding material treated with antiseptic agent and/or ant preventing agent
JPH10133654A (en) * 1996-10-29 1998-05-22 Yamaha Corp Stringed instrument type playing device
JPH10143139A (en) * 1996-11-11 1998-05-29 Yamaha Corp Keyboard musical instrument
JP2000239645A (en) * 1998-08-24 2000-09-05 Sekisui Chem Co Ltd Adhesive for modified silicone interior decoration material and adhering method for interior decoration material
JP2000265646A (en) * 1999-03-19 2000-09-26 Sekisui Chem Co Ltd Floor component
JP2003055637A (en) * 2001-08-10 2003-02-26 Kao Corp Adhesive for lignocellulose
JP2003293556A (en) * 2002-03-29 2003-10-15 Sekisui Chem Co Ltd Execution method for wood-based interior finishing material, wood-based interior finishing material and double-faced tape
JP2005154744A (en) * 2003-11-06 2005-06-16 Denki Kagaku Kogyo Kk Chloroprene rubber adhesive and its manufacturing method
JP2005179677A (en) * 2003-12-19 2005-07-07 Bayer Material Science Llc Two-component silylated polyurethane adhesive, sealant, and coating composition
JP2005314705A (en) * 2004-04-28 2005-11-10 Bayer Material Science Llc Moisture-curable polyether urethane and its use in sealant composition, adhesive composition and coating composition
JP2006317727A (en) * 2005-05-13 2006-11-24 Takatsuki Seikei Kk Sound absorption board and its manufacturing method

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