JP4829596B2 - Manufacturing method of non-combustible building material for natural wood veneer finish - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing an external natural wood veneer finished non-combustible building material, and more particularly, to a method for producing an external natural wood veneer veneer finished incombustible building material suitable as a building exterior material.

There are various types of non-combustible building materials for natural wood veneer finish for building, for example, non-combustible material is used for the base (base material), and 0.2 to 0.3 mm of adhesive is applied to the base. A natural wood decorative veneer finish incombustible building material is known in which a natural wood veneer veneer having a thickness is thermocompression bonded and the surface of the natural wood veneer veneer is coated (see, for example, Patent Document 1).
Japanese Patent Publication No. 50-18043

  By the way, in the case of natural wood decorative veneer finish incombustible building material with the above configuration, it is designed and manufactured on the assumption that it will be used as an interior material for construction. Various problems arise.

  For example, a non-combustible material with high water absorbency with a specific gravity of about 0.5 to 1.5 is used for the base (base material). There arises a problem that deteriorates at an early stage. In addition, the decorative veneer has problems such as cracking due to expansion and contraction due to a change in moisture content, peeling, and rapid discoloration due to ultraviolet rays. For this reason, since the beauty | look as an exterior material is impaired remarkably, it was difficult to use as an exterior material.

  On the other hand, the foundation of the above configuration is impregnated with low or medium molecular organic substances such as polyethylene glycol on the surface or under pressure to reduce the water absorption and prevent the ingress of moisture to ensure the dimensional stability of the foundation. To be done.

  However, surface impregnation and pressure impregnation have many processes for processing, and equipment corresponding to each process is required. Therefore, it takes time and labor for processing, and the equipment cost is high. It's expensive. In addition, since polyethylene glycol is a low-water-soluble, medium-molecule liquid, there is a problem that it re-elutes from the ground due to contact with external moisture over time, diffusion, and the action of gravity. Long-term stable water repellency cannot be obtained.

  Further, a natural wood decorative veneer-finished non-combustible building material (calcium silicate building material) configured to enhance water resistance performance by internally adding a water absorption inhibitor has been proposed. However, for natural wood decorative veneer finish incombustible building materials (calcium silicate building materials) having such a structure, calcium silicate is used as a water absorption preventing agent that has water repellency and is easily separated from water in raw material mixing before molding. Since it cannot be uniformly dispersed in the slurry, it is difficult to improve water resistance.

The present invention has been made in view of the above-described conventional problems, and even when used as an exterior material, it causes freezing and thawing, an adhesive or a decorative veneer deteriorates early, or has a moisture content. The decorative veneer is not cracked, peeled off, or suddenly discolored by ultraviolet rays due to expansion and contraction due to change, and the appearance as an exterior material can be maintained over a long period of time. The object of the present invention is to provide a method for producing a non-combustible building material with a natural wood veneer finish for external use , which is easy, has low equipment costs, and can reduce production costs.

The present invention is a method for producing an external natural wood decorative veneer-finished non-combustible building material used as a building exterior material for building, and is manufactured by producing calcium silicate through a predetermined raw material process and a reaction process. Inorganic fiber, water absorption inhibitor and styrene-butadiene rubber are added and mixed in calcium, and the inorganic fiber and water absorption inhibitor are uniformly dispersed in calcium silicate, and this is used as a raw material through dehydration molding process and drying process. By forming a base material, applying a surface treatment by applying a solventless self-penetrating impregnating agent to the surface of the base material, immersing in a polyethylene glycol aqueous solution, applying a polyethylene glycol aqueous solution, or By applying a silicone-modified isocyanate compound, the decorative veneer is subjected to dimensional stabilization treatment, and the base material and the decorative veneer are combined with an aqueous polymer. Bonded via an isocyanate-based adhesive, further, the decorative subjected to acrylic silicone paint to the surface of the veneer, in preparing the raw material of the base material in advance by mixing an inorganic fiber and water-absorption inhibitor, this Later, this mixture is mixed with calcium silicate and styrene-butadiene rubber.

According to the method of manufacturing an external natural wood decorative veneer finish incombustible building material according to the present invention, calcium silicate is manufactured through a predetermined original tone process and reaction process, and this calcium silicate is mixed with styrene-butadiene rubber and By adding and mixing the premixed inorganic fibers and the water absorption inhibitor, the water absorption inhibitor is uniformly dispersed in the calcium silicate. Then, using this as a raw material, a base material having a predetermined shape is formed through a dehydration molding process and a drying process, and a solvent-free self-penetrating impregnating agent is applied to the surface of the base material. Surface treatment is applied to the surface. And a dimension stabilization process is given to a decorative veneer by immersing in polyethylene glycol aqueous solution, apply | coating polyethylene glycol aqueous solution, or apply | coating a silicone modified isocyanate compound to a decorative veneer. Then, the base and the decorative veneer are bonded via an aqueous polymer isocyanate adhesive, and the surface of the decorative veneer is coated with acrylic silicone to produce a natural wood veneer veneered non-combustible building material for external use. Will be.
The non-combustible building material for natural wood decorative veneer finished for external use manufactured through such a process, when used as an exterior material, provides good uniform water repellency throughout the base material, and a veneer veneer. In addition, since the discoloration of the decorative veneer due to ultraviolet rays can be prevented, the beauty as an exterior material can be maintained for a long period of time.
Further, by mixing the inorganic fiber and the water absorption inhibitor in advance, the water absorption inhibitor is adhered or adsorbed between the surface of the inorganic fiber and the fiber, and the mixture is mixed with calcium silicate and styrene-butadiene rubber. In addition, the inorganic fibers and the water absorption inhibitor can be uniformly dispersed in the calcium silicate.

As described above, according to the method for producing an external natural wood decorative veneer finish incombustible building material and an external natural wood veneer veneer finish incombustible building material according to the present invention, inorganic fibers and water absorption prevention throughout the base material. Since the agent can be uniformly dispersed, the water absorption of the base material can be uniformly lowered throughout, i.e., the water repellency can be made uniform and good throughout, and the decorative veneer Dimensional stability can be ensured, and rapid discoloration of the decorative veneer due to ultraviolet rays can be prevented.
Therefore, when used as a building exterior material, even if it is exposed to the outside air, it will freeze and thaw, the decorative veneer and adhesive will deteriorate early, or the decorative veneer due to expansion and contraction due to a change in moisture content Since there is no such thing as cracking or peeling, and the decorative veneer is not suddenly discolored by ultraviolet rays, the appearance as an exterior material can be maintained for a long time, It can continue to be used for a long time as an exterior material.
Further, by mixing the inorganic fiber and the water absorption inhibitor in advance, the water absorption inhibitor is adhered or adsorbed between the surface of the inorganic fiber and the fiber, and the mixture is mixed with calcium silicate and styrene-butadiene rubber. In addition, the inorganic fibers and the water absorption inhibitor can be uniformly dispersed in the calcium silicate.

Hereinafter, embodiments of the present invention shown in the drawings will be described.
FIG. 1 shows an embodiment of an external natural wood decorative veneer finish incombustible building material according to the present invention, and the external natural wood veneer veneered incombustible building material 1 is suitable for an exterior material for construction. The base material 2 is an incombustible building material, and the decorative veneer 5 is bonded to the base material 2 through an aqueous polymer isocyanate adhesive 4.

  The base material 2 is made of a raw material in which inorganic fibers (glass fiber or the like) and a water repellent as an example of a water absorption preventing agent are uniformly dispersed in calcium silicate, and a predetermined molding method is used by using this raw material. The water-absorbing property as an example of the water-absorbing agent is uniformly reduced throughout the entire water, and a uniform water-repellent property is obtained throughout. It is configured to be.

  Calcium silicate is produced by mixing a predetermined amount of slaked lime, silica powder, and water to produce a mixture, and subjecting this mixture to a preliminary reaction (primary reaction) and a high-temperature pressure reaction (autoclave reaction). Is done.

  It is preferable to mix the inorganic fiber and the water repellent in advance, and then mix this mixture with calcium silicate and styrene-butadiene rubber. By producing such a mixture in advance, the water repellent can be adhered or adsorbed between the surface of the inorganic fiber and between the fibers, so that the inorganic fiber and the water repellent are uniformly dispersed in the calcium silicate. Can do.

  In the present embodiment, the weight ratio of calcium silicate: 75 to 89%, inorganic fibers (glass fibers, etc.): 11% or less, styrene-butadiene rubber and water repellent: 6% or less. A water repellent is added to and mixed with calcium acid.

  The base material 2 is formed by a well-known dehydration molding method using a press, and is formed into a predetermined shape (rectangular plate shape or the like) by drying, polishing, and cutting after the molding. The surface of the substrate 2 is subjected to a surface treatment (undercoating 3) by applying a solventless self-penetrating impregnating agent (urethane sealer) after drying. The solventless self-penetrating type impregnating agent has a property of penetrating into the cell gap of the base material 2 and partly penetrating into the inside of the cell, and improves the water repellency of the base material 2.

  Examples of the aqueous polymer isocyanate-based adhesive 4 include Marca UV bond (trade name, Chubu Seiden Co., Ltd.) and PI bond (trade name, Oshika Co., Ltd.). Marca UV bond is an adhesive that can be applied to curved surfaces by vacuum press bonding, three-sided bonding, etc., and PI bond is an adhesive that can be applied to flat surfaces by flat press bonding.

  Marka UV Bond uses Catalyst G (trade name, Chubu Seiden Co., Ltd.) as an additive, and by changing the amount of catalyst G added, the hot water resistance and boiling resistance can be changed freely. It has characteristics.

  The properties of Marca UV bond are: appearance: cloudy highly viscous liquid, viscosity (mPs-s): 6000 ± 2000 (30 ° C.), pH: 6.0 ± 1.0, non-volatile content (%): 42 ± 2, Water miscibility (25 ° C.): 20 times or more, pot life (25 ° C.): about 2.5 hours (when Catalyst G (trade name, Chubu Seiden Co., Ltd. 10% is added)). The properties of catalyst G are: appearance: dark brown liquid, viscosity (mPs-s): 200 ± 100 (25 ° C.), nonvolatile content (%): 100, water miscibility (25 ° C.): 1 times or more.

  PI Bond uses a crosslinking agent as an additive. The properties of PI Bond (PI Bond 5300) are: appearance: milky white viscous liquid, non-volatile content (%): 60, viscosity / 25 ° C .: 10 Pa-s, pH: 6.4. The properties of the cross-linking agent (cross-linking agent H-30) are appearance: black-brown homogeneous liquid, viscosity / 25 ° C .: 0.025 Pa-s.

  As the decorative veneer 5, for example, a natural wood decorative veneer (eg, zelkova, oak, sen, hippo, sen, cypress, etc.) having a thickness of 0.2 to 0.3 mm is used. Then, a predetermined dimensional stabilization process is performed.

  As the dimension stabilization treatment, for example, the decorative veneer 5 is immersed in a polyethylene glycol 10-30% aqueous solution (average molecular weight: about 200-1000), and the polyethylene veneer 10-30% aqueous solution (average molecular weight: And a method such as applying a silicone-modified isocyanate compound to the decorative veneer 5.

  The surface of the decorative veneer 5 is subjected to a surface treatment by acrylic silicone coating (top coating 6), and this overcoating 6 can prevent the decorative veneer 5 from being rapidly discolored by ultraviolet rays. The decorative veneer 5 can be naturally discolored over time.

Next, the manufacturing method of the non-combustible building material 1 for exterior natural wood veneer finish according to the present invention configured as described above will be described.
As shown in FIG. 2, the manufacturing method of the external natural wood decorative veneer finish incombustible building material 1 includes a base material forming step for forming the base material 2 and a decorative veneer processing for applying a predetermined treatment to the decorative veneer 5. And a bonding step of bonding the base material 2 obtained in the base material forming step and the decorative veneer 5 obtained in the decorative veneer processing step.

(1) Base material forming process The base material forming process is composed of an original tone process, a reaction process, a pressing process, a line process, and a shipping process, as shown in FIG. Hereinafter, each step will be described.

1) Original Condition Process In the original condition process, a predetermined amount of slaked lime, silica, and water are mixed to produce a mixture, and a predetermined amount of this mixture is prepared by measurement.

2) Reaction process The reaction process consists of a pre-reaction (primary reaction) and a high-temperature pressure reaction (autoclave reaction). The pre-reaction (primary reaction) and high-temperature heating are applied to the mixture produced in the original preparation process. By applying a pressure reaction (autoclave reaction), calcium silicate having a predetermined property is produced.

3) Pressing process In the pressing process, first, an inorganic fiber (glass fiber or the like) and a water repellent are added to and mixed with calcium silicate obtained in the reaction process to produce a forming raw material.
In this case, it is preferable to previously mix the inorganic fiber and the water repellent, and then mix this mixture with calcium silicate. By producing such a mixture in advance, the water repellent can be adhered or adsorbed between the surface of the inorganic fiber and between the fibers, so that the inorganic fiber and the water repellent are uniformly dispersed in the calcium silicate. Can do.
In the present embodiment, by weight ratio, calcium silicate: 75 to 89%, inorganic fiber (glass fiber or the like): 11% or less, styrene-butadiene rubber and water repellent: 6% or less. Add water repellent to calcium silicate and mix. Next, the base material 2 having a predetermined shape is formed by performing dehydration molding with a press using a raw material and drying.

4) Line process In a line process, it grind | polishes and cut | disconnects with respect to the base material 2 shape | molded by the dehydration molding, It is set as a predetermined dimension, and this is stacked | stacked.
In this case, a solventless self-penetrating impregnating agent (urethane sealer) is applied to the surface of the substrate 2 and surface treatment (primer 3) is applied. This solventless self-penetrating impregnating agent penetrates into the cell gaps of the substrate 2 and partly penetrates into the cells, thereby increasing the water repellency of the substrate 2.

5) Shipping process In the shipping process, the stacked base materials 2 are packaged and shipped.

  Thus, the base material 2 having a predetermined composition and shape can be manufactured. In the present embodiment, a base material 2 having calcium silicate: 75 to 89%, inorganic fiber: 11% or less, and organic matter (styrene-butadiene rubber and water repellent): 6% or less was obtained.

(2) Makeup veneer processing step The veneer veneer treatment step is a step of applying a dimensional stabilization treatment to the veneer veneer 5, and the veneer veneer 5 has a natural thickness of 0.2 to 0.3 mm. Wood veneer veneers (eg zelkova, oak, sen, hippo, sen, hinoki) are used.

  First, the decorative veneer 5 is immersed in a polyethylene glycol 10-30% aqueous solution (average molecular weight: about 200-1000), and the polyethylene glycol 10-30% aqueous solution (average molecular weight: about 200-1000) is applied to the decorative veneer 5. Alternatively, a silicone-modified isocyanate compound is applied to the decorative veneer 5.

Next, a surface treatment (top coating 6) is performed on the surface of the decorative veneer 5 by acrylic silicone coating. The top coat 6 prevents the decorative veneer 5 from being rapidly discolored by ultraviolet rays, and can be discolored at a natural speed in the same manner as natural wood.
In addition, you may perform the top coat 6 on the surface of the decorative veneer 5 after the adhesion process mentioned later.

(3) Bonding process The bonding process is a process in which the decorative veneer 5 obtained in the decorative veneer processing process is bonded to the substrate 2 obtained in the substrate molding process via the aqueous polymer isocyanate adhesive 4. In addition, as the water-based polymer isocyanate-based adhesive 4, Marca UV bond (trade name, Chubu Seiden Co., Ltd.) or PI bond (trade name, Oshika Co., Ltd.) is used. A natural wood for external use in which the base material 2 and the decorative veneer 5 are integrated by adhering the decorative veneer 5 to the upper part of the base material 2 through an aqueous polymer isocyanate adhesive 4 by a well-known bonding method. A decorative veneer finish incombustible building material 1 is manufactured.

  In the method of manufacturing an external natural wood decorative veneer finish incombustible building material and an external natural wood veneer veneer finish incombustible building material according to the present embodiment configured as described above, the entire base material 2 is water repellent. Since the agent can be uniformly dispersed, the water absorption of the base material 2 can be made uniformly low throughout, and good water repellency that is uniform throughout can be obtained. In addition, the dimensional stability of the decorative veneer 5 can be ensured, and sudden discoloration due to ultraviolet rays can be prevented. Therefore, when it is used as a building exterior material, even if it is exposed to the outside air, it will freeze and thaw, the decorative veneer 5 and the adhesive 4 will deteriorate early, and the makeup may be caused by expansion and contraction due to a change in moisture content. The veneer 5 is not cracked or peeled off, and the veneer veneer 5 is not suddenly discolored by ultraviolet rays. And can continue to be used for a long time as an exterior material.

Hereinafter, a plurality of test specimens having the same raw material composition and different mixing methods before molding are shown, and the results of comparison of water absorption are shown.
<Example 1>
The raw material composition was calcium silicate: 90.8%, glass fiber: 4.6%, pulp: 0.6%, and water repellent: 4.0%.
Specimen A was prepared by mixing glass fibers and water repellent well in advance when mixing the raw materials, and sufficiently adhering or adsorbing the water repellent to the glass fibers, and then other raw materials (calcium silicate, pulp) and Mixed and molded.
In the test body B, each raw material was charged separately, mixed and molded.
Specimen A and Specimen B were both molded and dried, adjusted to an apparent specific gravity of about 0.35 and a water content of about 1%, and a water absorption test of JIS A 5430 was performed. As a result, the specimen A had a water absorption of 4.7%, and the specimen B had a water absorption of 10.5%.

<Example 2>
The raw material composition was calcium silicate: 83.0%, glass fiber: 4.6%, latex: 8.3%, water repellent: 4.1%.
In Test C, the glass fiber and the water repellent were mixed well in advance when mixing the raw materials in the same manner as in Example 1, and after the water repellent was sufficiently adhered or adsorbed to the glass fiber, other raw materials (calcium silicate) were used. , Latex) and molding.
In the test body D, each raw material was charged separately, mixed and molded.
Specimen C and Specimen D were both molded and dried, adjusted to an apparent specific gravity of about 0.55 and a water content of about 1%, and a water absorption test of JIS A 5430 was performed. As a result, the specimen C had a water absorption of 3.1%, and the specimen D had a water absorption of 6.4%.

  From these results, it is better to mix glass fiber and water repellent well beforehand, and to use this mixture and other raw materials (calcium silicate, pulp, latex) as the raw material for molding has a lower water absorption rate. It was found that a building material having higher water resistance can be obtained.

It is the schematic which showed one Embodiment of the natural wood decorative veneer finish noncombustible building material by this invention. It is process drawing of the manufacturing method of the natural wood decoration veneer finish incombustible building material for external use by this invention. It is explanatory drawing of a base-material formation process.

Explanation of symbols

1 Natural wood veneer veneer finish for non-combustible building materials 2 Base material 3 Undercoat 4 Aqueous polymer isocyanate adhesive 5 Veneer veneer 6 Top coat

Claims (1)

A method of manufacturing a non-combustible building material for natural wood veneer veneer finish used as an exterior material for buildings,
Calcium silicate is manufactured through a predetermined original process and reaction process, and inorganic fiber, water absorption inhibitor and styrene-butadiene rubber are added to and mixed with this calcium silicate, and inorganic fiber and water absorption prevention are added to calcium silicate. The base material is molded through a dehydration molding process and a drying process using this as a raw material, and a surface treatment is applied by applying a solventless self-penetrating impregnating agent to the surface of the base material. ,
By immersing in a polyethylene glycol aqueous solution, by applying a polyethylene glycol aqueous solution, or by applying a silicone-modified isocyanate compound, the decorative veneer is subjected to dimensional stabilization treatment,
Adhering the base material and the decorative veneer via an aqueous polymer isocyanate-based adhesive,
Furthermore, an acrylic silicone coating is applied to the surface of the decorative veneer,
  When manufacturing the raw material of the base material, an inorganic fiber and a water absorption inhibitor are mixed in advance, and then this mixture is mixed with calcium silicate and styrene-butadiene rubber. A method of manufacturing non-combustible building materials with decorative veneer finish.

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