JP2000185303A - Laminated flooring or building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth the surface and improve the impact absorbing properties and the sound insulating properties by laminating a composition of wood fiber, ceramic fine hollow particles having specific compression strength, bulk specific gravity and melting point and a resol-type phenolic resin on the first and the second surfaces of a particle board as a core and thermally molding this laminate under pressure. SOLUTION: First wood fiber 5, ceramic fine hollow particles 4 having at least 600 kgf/cm2 compression strength, 0.3-0.5 g/cm3 bulk specific gravity and at least 1,500 deg.C ceramic fine hollow particles 4 are kneaded with a resol-type phenolic resin 6, and this kneaded product is laminated on the first and the second surfaces of a particle board as a core 3, and further this laminate is thermally molded under pressure. This molding process is performed under 10-100 kgf/cm2 pressurizing force and at 110-130 deg.C heating temperature maintained for 30-100 min. The particle diameter of the ceramic fine hollow particles 4 is classified into 5-75 μm fine mesh, 75-150 μm intermediate mesh and 150-350 μm coarse mesh. These hollow particles 4 are used by mixing 20 pts.wt. fine mesh, 20 pts.wt. intermediate mesh and 30 pts.wt. coarse mesh. The wood fiber 5 is preferably of 100-600 μm diameter and 5-30 mm length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can be used as a laminate flooring material for building materials having high strength, light weight, and excellent shock absorption and sound insulation properties, and can be used as a flooring material for buildings.

[0002]

2. Description of the Related Art Conventionally, particle boards have been used as floors in prefabricated houses, RC apartment houses, and sound insulation floors in gymnasiums. Even if the building is made of reinforced concrete or steel, it is often used as a flooring material because of its sensitivity and walking feeling.
However, when the particle board is used as a flooring material, it is very difficult to prevent the propagation of the impact sound on the upper floor to the lower floor because the impact sound absorbing performance is poor.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laminated flooring material for building materials having a smooth surface, a low water absorption, a solid, light weight, excellent physical strength and shock absorption and sound insulation. As an issue.

[0004]

Means for Solving the Problems The laminated flooring material for a building material of the present invention uses a particle board as a core material, wood fibers on its front and back surfaces, a compressive strength of 600 ° C kgf / cm ² or more and a bulk specific gravity of 0.1 kgf / cm ² or more.
A composition comprising a resol-type phenol resin is laminated on ceramic fine hollow particles having a melting point of not less than 1500 ° C. and a melting point of not less than ^{3 to} 0.5 g / cm ³ , and is subjected to pressure and heat molding.

[0005] Ceramic fine hollow particles have a compressive strength of 60.
0 kgf / cm ² or more, bulk specific gravity 0.3-0.5 g / c
A material having m ³ and a melting point of 1500 ° C. or more is used.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION On the front and back surfaces of a laminated flooring material for building materials, high-strength ceramic fine hollow particles are bonded to each other, and this portion is fixed with a phenol resin. The core material is a particle board, and the front and back sides are made of wood fiber and have a compressive strength of 600 kgf /
In cm ² or more, bulk density 0.3 to 0.5 g / cm ^3, after a slight amount added sufficient kneading resole phenolic resin and water to the melting point 1500 ° C. or more ceramic fine hollow particles, are stacked by adding a curing agent Press and heat mold. Pressing force is 10
100 kgf / cm ² and heating temperature 110-130 ° C 30
Hold and mold for ~ 100 minutes. Specific gravity of front and back is 0.6 ~
0.9.

[0007] Since the high-strength ceramic fine hollow particles can exist completely in the form of a hollow body on the front and back surfaces of the laminated flooring material for building materials, the ceramic fine hollow particles are fixed to each other by point bonding. In addition, they found that there were countless capillary air circulation holes. By adopting such a structure, the propagation of the sound to the impact sound can be absorbed, and the sound insulation as a floor material can be greatly improved.

[0008] The resol type phenolic resin used on the front and back surfaces of the laminated flooring material for building materials of the present invention is phenols such as phenol, cresol, xylenol, paraalkylphenol, paraphenylphenol, resorcin and modified products thereof and formaldehyde, paraformaldehyde. And aldehydes such as furfural and acetaldehyde are reacted with an alkaline catalyst such as sodium hydroxide, potassium hydroxide, calcium hydroxide, hexamethylenetetramine, trimethylamine and triethylamine.

The ceramic fine hollow particles used in the present invention have particularly high compressive strength as compared with conventional fine hollow particles, and can withstand high stress and shearing force. Furthermore, by pressing, the front and back surfaces of a dense laminated flooring material for building materials can be formed despite being lightweight.

[0010] The compressive strength, which is an index of the strength of the ceramic fine hollow particles, is synonymous with the water pressure resistance. The measurement of the compressive strength is based on the fact that the fine hollow particles are pressurized in water and the pressure applied to the water is reduced. And the pressure at which the fine hollow particles are destroyed is referred to as compressive strength or water pressure resistant strength.

[0011] Laminated flooring materials for building materials that can exhibit excellent performance must have sufficient stirring and kneading steps, and are particularly important for producing uniform and high-quality products. When the composition is sufficiently stirred and kneaded as in the present invention, the stress and shearing force applied to the ceramic fine hollow particles become 300 kgf / cm ² or more. None of the conventional fine hollow particles could withstand such a high pressure, and none of them could be used as such a laminated flooring material for building materials to obtain sufficient performance. That is, most of them are destroyed.

When ceramic fine hollow particles are used for a laminated flooring material for building materials, it is important that the ceramic fine hollow particles are not broken. Excellent effects can only be obtained when completely fine hollow particles which are not destroyed are used. The ceramic fine hollow particles used in the present invention have much higher compressive strength than conventional fine hollow particles such as shirasu balloons, glass balloons, silica balloons, etc., and the ceramic fine hollow particles are 100% perfectly spherical. It is. Compressive strength of conventional fine hollow particles is 80 ~
It is 300 kgf / cm ² .

[0013] The melting point of the ceramic fine hollow particles used in the present invention is 1500 ° C or more. Naturally, the fine ceramic hollow particles are caused by their material, but generally, the higher the melting point, the higher the compressive strength. Compressive strength 600k
If gf / cm ² or more, the melting point will be 1500 ° C. or more.

As described above, the ceramic fine hollow particles used in the present invention comprise 50 to 60% of silica and 40% of alumina.
This foam is formed by foaming a ceramic composition comprising 45% to 45% and 1.5 to 2.5%, and its physical properties are compressive strength of 600 kgf / cm ² or more, melting point of 1500 ° C. or more, and bulk specific gravity of 0.3 to 0. 5 g / cm ³ , thermal conductivity 0.1 (kca
1 / mhr ° C.). The particle size of the ceramic fine hollow particles is 5-350 μm
Of the range of 5 to 75 μm, 75 to
The particle size is adjusted to 150 μm and coarseness of 150 to 350 μm by mixing 20 parts by weight of fine, 20 parts by weight of medium and 30 parts by weight of coarse. The bulk specific gravity is heavy for fine particles and light for rough ones. For this reason, the range of the bulk specific gravity is 0.3 to
0.5 g / cm ³ , but the particle size adjusted is 0.3 g / cm ^3.
It is around 6 g / cm ³ .

The curing agent is used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the resole type phenol resin, and the fine ceramic hollow particles are added in an amount of 400 to 900 parts by weight. If the amount is less than 400 parts by weight, the shock absorbing property and the sound insulation property cannot be sufficiently exhibited, and if the amount is more than 900 parts by weight, the strength is greatly reduced.

The particle board used as the core material of the laminate for building materials is a board obtained by applying an adhesive to wood chips, flakes and the like and molding and pressing the same.

The wood fiber used in the present invention has a diameter of 100 to
A length of 5 to 30 mm with a thickness of 600 μm is preferably used.
100-600 μm in diameter, 100 μm-3 between fibers
This is because a gap of about mm is formed, and the gap is uniformly filled with the ceramic fine hollow particles. Stirring length
This is because fibers can be uniformly dispersed without entanglement during kneading. Other than wood fiber, if necessary, organic fiber,
Inorganic fibers, pulp and the like may be mixed.

In addition to the main constituent materials, admixtures such as dispersants, antibacterial and antifungal agents, stabilizers and the like, inorganic extender pigments and the like are used to improve properties. A thickener, a titanium powder, an alumina powder, or the like may be added to improve the press-moldability for improving fire resistance and physical properties.

[0019]

Embodiments of the present invention will be described below in detail.

Example Resol type phenolic resin 100
Compressive strength 700kgf / cm to 3 parts by weight of wood fiber
² , bulk specific gravity 0.3 to 0.5 g / cm ³ , melting point 1600
750 parts by weight of a ceramic fine hollow particle composed of only completely hollow particles and having a thermal conductivity of 0.1 (kcal / mhr ° C.), and 750 parts by weight of water, 80 parts by weight of water, and other dispersants and stabilizers. After adequately stirring and kneading the compositions added in appropriate amounts, 20 parts by weight of a phosphoric acid-based curing agent is added, and the mixture is further sufficiently stirred and kneaded to have a thickness of 12 mm, a length of 1820 mm and a width of 910 mm.
A 4 mm-thick particle board was laminated on each of the front and back surfaces of the particle board, and the surface was press-molded at 20 kgf / cm ² , heated to 125 ° C., cured for 60 minutes, and cured to produce a laminated flooring material for building.

The specific gravity of the laminated flooring material for building materials produced in the examples was 0.72 (g / cm ³ ), and the water absorption of the surface was 1.2% or less. It was found that the shock absorption performance was improved by about 15% as compared with the particle board having a thickness of 20 mm, and the sound insulation performance was improved by 2 db in 1000 cycles.

[0022]

As described above, the laminated flooring material for building materials according to the present invention has a front and a back surface layer formed of a composition comprising a wood fiber and ceramic fine hollow particles and a resol type phenol resin on the front and back surfaces of a core particle board. ing.

By adopting such a structure, the impact sound absorbing performance and the sound insulating performance when the particle board is used for the flooring material can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a laminated flooring material for building materials.

[Explanation of symbols]

 1. 1. Surface layer Back layer 3. Particle board 4. 4. Ceramic fine hollow particles Wood fiber 6. Phenolic resin

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B29K 61:04 105: 06 F term (reference) 2B250 AA05 CA11 DA04 EA02 EA13 FA21 FA31 FA37 GA03 2B260 AA09 BA01 BA19 CB01 CB04 CD03 DA04 EA05 EB02 EB06 EB19 EB21 EB42 4F100 AD00B AD00C AK34B AK34C AP00B AP00C AP03A BA03 BA06 BA10B BA10C CA02 DG01B DG01C GB08 JA04B JA04C JA13B JA13C JD01 JH01 JK01AB18 AB01 AJB01A18AJB13B FN15 FN17

Claims (1)

[Claims] 1. Using a particle board as a core material, fine hollow ceramic particles having a compressive strength of not less than 600 kgf / cm ² , a bulk specific gravity of 0.3 to 0.5 g / cm ³ , and a melting point of not less than 1500 ° C. A laminated flooring material for building materials, comprising laminating a composition comprising a resole-type phenolic resin and press-molding.