JP2002127112A - Wood flooring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood flooring which is comparatively cheap, excellent in caster resistance and free from a problem of remaining of an organic solvent and the like. SOLUTION: A base material plywood is provided by laminating a hard veneer of >=0.7 air-dried specific gravity on the highest surface. A plurality of hard wood-made blocks of which the fiber directions are made the same direction are arranged along the fiber direction to form laminated lumbers which are fixed to each other. The laminated lumber is sliced to form a laminated veneer of 0.15-1 mm and >=0.7 air-dried specific gravity. The laminated veneer is bonded mutually in a fiber direction crossing at right angles to the fiber direction of the hard veneer of the base material plywood. A face veneer of 0.15-0.5 mm thickness is bonded mutually in the fiber direction crossing at right angles to the fiber direction of the surface of the laminated veneer to constitute the wood flooring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood flooring material for general household use which is made by bonding a decorative veneer to a base plywood.

[0002]

2. Description of the Related Art Recently, even in general households, chairs with wheels, tables, other furniture, use of wheelchairs, etc.
Floor materials with caster resistance are desired.

[0003] Household wooden flooring with caster resistance is:
In general, those using MDF (medium-density fiberboard) for the floor substrate, WPC (decorative veneer veneer) made by impregnating veneer with resin, and those using resin-impregnated paper are used. I have.

[0004] However, when the MDF is bonded, it greatly expands and contracts due to moisture, and is not very suitable for Japanese climate and lifestyle. Furthermore, when water is immersed for a long time as in the case of flooding, the floor using MDF and HDF becomes in a state where it cannot be used again even if the base material expands and dries.

[0005] In the case of using resin-impregnated or impregnated paper, the number of manufacturing steps is increased and the cost is increased.
Depending on the resin used, there are problems such as residual monomers and organic solvents.

[0006]

The wooden flooring material of the present invention is:
It is an object of the present invention to provide a wooden flooring material which is relatively inexpensive, has excellent caster resistance, and has no residual problem such as an organic solvent.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a plywood substrate comprising a plurality of hard plywood layers formed by laminating a hard veneer on the uppermost surface thereof and having the same fiber direction. The wooden blocks are arranged along the fiber direction to form a glued laminated wood that is fixed to each other, and the glued laminated wood is sliced to form a glued laminated veneer having a thickness of 0.15 to 1 mm. The laminated veneer is laminated in a fiber direction perpendicular to the fiber direction of the plate, and a decorative veneer having a thickness of 0.15 to 0.5 mm is laminated in a fiber direction perpendicular to the fiber direction of the surface of the laminated veneer. Configuration.

According to this structure, the fiber direction of the surface of the base material plywood and the fiber direction of the laminated veneer are bonded so as to be orthogonal to each other, and a hard tree species is used also for the surface layer of the lower base material plywood. Therefore, the strength is synergistically increased, the load imbalance due to the running direction of the casters is dispersed, the directionality of the strength is eliminated, the thickness of the laminated veneer is 0.15 to 1 mm, and the thickness of the decorative veneer is Provides a wooden flooring material that can exhibit caster resistance more efficiently because it is as thin as 0.15 to 0.5 mm, is relatively inexpensive, has excellent caster resistance, and has no residual problem such as organic solvents. can do.

According to a second aspect of the present invention, the hard veneer and the laminated veneer as the uppermost layer of the base plywood are made of a hard tree species having an air-dry specific gravity of 0.7 or more.

[0010] According to this configuration, since a tree species having a hard grain surface is used, it is difficult for the load due to the dynamic load by casters or the like and the push-in damage due to the local load by furniture or the like to occur, and the concave portion is generated. Warpage and swelling can also be prevented without reducing the strength.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

In the wooden flooring material according to the present invention, the base material plywood is formed by laminating a hard veneer on the uppermost surface, and a plurality of hard wooden blocks having the same fiber direction are arranged along the fiber direction. , Making a glued glue bonded to each other, slicing this glued glue, making a glued veneer with a thickness of 0.15 to 1 mm, said fiber direction in the fiber direction orthogonal to the fiber direction of the hard veneer of the base plywood The laminated veneer is attached, and the thickness is 0.15 to 0.5 mm in the fiber direction orthogonal to the fiber direction on the surface of the laminated veneer.
It is made by bonding decorative veneers.

As shown in FIG. 1, the base material plywood 1 is formed by sequentially laminating southern materials such as Red Lauan so that the fiber directions of the respective layers are orthogonal to each other. Has a fiber direction in the direction, with an air-dry specific gravity of 0.7 or more, and a thickness of 0.8 to 1.2 using a hard tree species having a hard surface of the board
It is a 5-ply plywood in which mm hard veneers 4 are laminated. Here, the hard veneer on the top surface is a tree species that is usually called hardwood in South Sea wood (hardwood), common name, cruin, in consideration of ease of securing quantity and later workability. It is formed using Apithon, Capole, Kenpath, Merbau and the like.

As shown in FIG. 3, the laminated veneer 2 is preferably made of a tree species having an air-dry specific gravity of 0.7 or more and having a hard surface such as apiton, kruin, and kaempas. The rectangular block 5 is cut into a predetermined size so as to be in the longitudinal direction, a plurality of blocks are arranged so that the long sides of the block 5 are in contact with each other, bonded together with an adhesive, and integrated to form a laminated material. Glued timber in hot water at 70-80 ° C for 12
After soaking for 0 to 180 hours, the thickness in the longitudinal direction is 0.15 to
It is formed by slicing to 1 mm, preferably 0.2 to 0.4 mm, and drying.

[0015] Since a tree species having a hard surface is used, it is hard to be damaged by dynamic load caused by casters or the like or by local load caused by furniture or the like, and the strength is reduced due to the formation of recesses. Also, the occurrence of warpage and swelling can be prevented. Furthermore, since the laminated material using the adhesive is immersed in warm water for a long time, the organic solvent and the like can be sufficiently removed, and problems such as residual monomer and organic solvent can be prevented.

The thickness of the laminated veneer is 0.15 to 1 mm,
The reason why the thickness is preferably set to 0.2 to 0.4 mm is to achieve harmony with workability at the time of producing the flooring material, strength as the flooring material, and cost.

As shown in FIG. 1, the veneer veneer 3 is a commonly used veneer veneer or the like having a thickness of 0.15 to 0.5 mm.
It is 5 mm, and the material is not particularly limited.

Further, the wooden flooring has a thickness of 0.15 to 1 mm having a fiber direction parallel to the transverse direction on the hard veneer surface of the base plywood having a fiber direction parallel to the longitudinal direction. The laminated veneers are stuck together so that both fiber directions are orthogonal to each other. On this laminated veneer, a decorative veneer having a fiber direction parallel to the longitudinal direction and having a thickness of 0.15 to 0.5 mm is placed in both fiber directions. Are bonded at right angles, cut into desired dimensions, and processed and painted as necessary.

As described above, the fiber direction of the hard veneer surface of the base plywood and the fiber direction of the laminated veneer are bonded so as to be orthogonal to each other, and the hard tree species is also applied to the surface layer of the lower base material plywood. Since they are used, the strength is synergistically increased, the load imbalance in the running direction of the casters is dispersed, the directionality of the strength is eliminated, and the caster resistance is further exhibited.

This means that the thickness of the laminated veneer is 0.15 to 0.15.
Since the thickness of the veneer veneer is reduced to 1 mm and the thickness of the veneer veneer is reduced to 0.15 to 0.5 mm, the effect can be exhibited more efficiently.

At this time, the adhesive to be used may be any one of a generally used thermosetting resin such as melamine-based, acrylic-based or epoxy-based resin.

[0022]

Next, an embodiment of a wooden flooring material according to the present invention will be described.

A 12 mm thick x 945 mm wide x 1840 mm long sheet made by laminating a Cruin hard veneer on the top surface
Is prepared according to a standard method.

As shown in FIG. 3, a plurality of quinine prismatic blocks 5 each having a fiber direction in the longitudinal direction are arranged so that the long sides thereof are in contact with each other, and the blocks 5 are bonded together with an adhesive to be integrated. A laminated wood (thickness 80 mm × width 315 mm × length 1840 mm) in which the fiber direction is arranged in the short direction is prepared.

After boiling this laminated wood in hot water of about 80 ° C. for about 150 hours, it is sliced sequentially in the longitudinal direction to have a thickness of 0.1 mm.
A crane laminated veneer 2 of 25 mm (315 mm wide × 1840 mm long) is prepared.

On the surface of the base plywood 1 having a fiber direction in the longitudinal direction, three laminated veneers 2 having a fiber direction in the short direction are arranged so that the long sides thereof are in contact with each other. The boards are attached with an adhesive so that the fiber directions of the boards are orthogonal to each other.

On this laminated veneer 2, a thickness 0.27 mm × width 315 mm × length 1 having a fiber direction parallel to the longitudinal direction
Three 840 mm veneer veneer veneers are arranged so that their long sides are in contact with each other, and are bonded together with an adhesive so that the fiber directions of both veneers are orthogonal to each other.

At this time, the applied amount of the adhesive is about 11
0g / m ² , the pressing conditions are about 110 ° C and 60-8
It is bonded at 0 kg for 7 seconds at 7 kg / cm ² . At this time, the adhesive used is manufactured by Honen Corporation, NW-085 (melamine resin) 85 parts DS-2020 (synthetic rubber resin) 15 parts Flour 30 parts Water 5-10 parts Ammonium chloride 0 .35 parts.

Next, a test method for testing the caster resistance of the wooden flooring will be described.

As shown in FIG. 4, the test was performed using a caster tester (crank type) under the following conditions.

・ Caster used: Hammer caster 4
20GC-50 (diameter 50mm) / 4 pieces ・ Load: 100kg (25kg / piece) ・ Running speed: 5m / min ・ Cutting wooden flooring material to width 75mm x length 565mm,
One set of two test pieces.

Test Method a) Two test pieces are fixed in parallel on a platen with their long sides in contact with each other and arranged in parallel.

B) Two casters in the front-rear direction in the running direction are set as a set (four in total), and a running distance of 2
Reciprocate a predetermined number of times between 00 mm.

C) The running position of each caster (200 mm
The maximum amount of each dent in the interval is measured by using a dial gauge, and the average value of the four points is determined to be the average amount of dent.

A comparative test was conducted by the above test method, and the following results were obtained.

Examples Average dent amount (mm) 1,0,000 reciprocations 0.15 2,0,000 reciprocations 0.20 3,0,000 reciprocations 0.25 4,0,000 reciprocations 0.35,10000 0.30 Comparative example Average dent (mm) 7, Company S 0.3-0.48, Company D (WPC) 0.3-0.49, Company T (WPC) 0.55 10 , N company (MDF) 0.65 11, S company (paper pasted) 0.80 12, T company 0.70 13, D company 0.55 14, E company 0.4-0.515, S company ( Cross board) 0.80 As is clear from the results, the wooden flooring material according to the present invention has very few dents even during long-term use, and is excellent in caster resistance.

[0037]

As is apparent from the above description, the wooden flooring material according to the present invention has various practically excellent effects listed below.

The wooden flooring material according to the present invention is bonded so that the fiber direction of the surface of the base material plywood and the fiber direction of the laminated veneer are orthogonal to each other, and the surface layer of the lower base material plywood also has a high hardness. Since the tree species are used, the strength is synergistically increased with each other, the load imbalance due to the traveling direction of the casters is dispersed, the directionality of the strength is eliminated, and the thickness of the laminated veneer is 0.15 to 1 mm.
Since the thickness of the veneer veneer is reduced to 0.15 to 0.5 mm, caster resistance can be exhibited more efficiently, and it is relatively inexpensive, has excellent caster resistance, and has a problem of residual organic solvent. No wood flooring can be provided.

Further, since a tree species having a hard grain surface is used, it is hard to be damaged by a dynamic load caused by casters or the like and a local load caused by furniture or the like. The occurrence of warpage and swelling can also be prevented without causing warping.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a process of manufacturing a wooden flooring material according to the present invention.

FIG. 2 is a partially omitted cross-sectional view taken along line II of FIG.

FIG. 3 is an explanatory perspective view of a laminated veneer according to the present invention.

FIG. 4 is an explanatory view showing a test method of caster resistance.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base material plywood 2 laminated veneer 3 decorative veneer 4 hard veneer 5 prismatic block

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shoji Watanabe 291-9 F-term (reference) 2B002 AA02 AA12 AC01 AC03 BA01 BB06 DA01 2B250 AA05 BA05 CA11 DA04 EA02 EA13 FA21 FA28 FA31 FA37 FA53 FA55

Claims (2)

[Claims] 1. A base plywood laminated with a hard veneer on the uppermost surface thereof, and a plurality of hard wooden blocks having the same fiber direction are arranged along the fiber direction, and a laminated material fixed to each other is formed. Create and slice this glued lumber to a thickness of 0.1
A laminated veneer of 5 to 1 mm is made, and the laminated veneer is bonded in a fiber direction orthogonal to the fiber direction of the hard veneer of the base plywood, and in a fiber direction perpendicular to the fiber direction of the surface of the laminated veneer. Wooden flooring made by sticking decorative veneers 0.15 to 0.5 mm thick. 2. The wooden flooring according to claim 1, wherein the laminated veneer and the hard veneer are made of a hard tree species having an air-dry specific gravity of 0.7 or more.