JP4610057B2 - Frame and architectural fittings - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a frame and a building fixture using the frame, and more particularly to a frame integrally molded with a urethane foam resin and having a surface finish, and a building fixture using the frame.
[0002]
Conventionally, in building fixtures such as doors and doors incorporating windows, panels, etc., a wooden frame has been attached to the periphery of these built-in portions and painted for use.
The frame was made by adhering edges that were chamfered from wood, or by tacking them together and painting the surface. However, the doors, doors, etc. that are used outdoors are exposed to wood over time. Due to the shrinkage and distortion of the film, there was a gap in the built-in part, the coating film cracked, and the coating film was peeled off.
[0003]
In addition, it was also done to mold joinery members etc. with urethane resin using a mold, but there is a disadvantage that the weather resistance of urethane resin is bad and yellowing over time, but non-yellowing type resin is expensive Therefore, there was a problem that it could not be used practically.
[0004]
The present invention has been developed as a result of research and development in view of such a situation, and even when used in an environment facing the outdoors, the frame body is excellent in durability and does not cause an error, and the frame body is made of glass, It provides building fixtures such as doors and doors used for built-in parts such as panels, etc., and on the mold surface of the master mold molded using a male mold that becomes a sample frame processed from natural materials, electrostatic powder coating is applied, after the barrier layer is provided, the frame body formed by molding the master mold foamed urethane resin NOTE oN to, or the mold surface of the master mold, electrostatic powder coating is applied, the barrier layer is provided, then to a frame member molded urethane foam resin NOTE ON to it is related fittings for construction that is mounted.
[0005]
The present invention will be described in detail below.
As an example of a male mold, a master mold such as a silicon resin is molded based on a sample frame processed from natural wood, and then a barrier layer is formed on the mold surface of the master mold. Next, the urethane foam resin is cast and cured, and the molded body is released from the master mold to obtain a frame. At that time, powder coating is applied to the surface of the master mold prior to the formation of the barrier layer, or the molded body is released from the master mold and then finished by applying clear coating.
In addition, the design can be improved by applying paint to the concave portions of the molded product by wiping coating prior to clear coating to darken the grain pattern or the like.
It should be noted that any material other than natural wood such as stone and leather may be used as the natural material.
[0006]
The barrier layer is prepared by blending synthetic resin, pigment, plasticizer, etc. and dissolved in an aromatic solvent, ester solvent, alcohol solvent, glycol solvent, ether solvent, or a mixed solvent thereof. As the synthetic resin, acrylic resin, urethane resin, epoxy resin, unsaturated polyester resin, vinyl ester resin, nitrified cotton-based resin and the like are used. Among these, it is desirable to employ a barrier layer that includes a functional group in the resin and forms a crosslinked structure. It is desirable to ensure a dry thickness of 5 to 30 microns.
In order to secure performance, the barrier layer is preferably dried or cured to form a coating and then injected with urethane foam resin.
[0007]
A foamed urethane resin is a prepolymer obtained by partially polymerizing a polyol and an isocyanate compound in advance and blended with a catalyst, a foaming agent, a surfactant, etc., and foamed and cured. The foaming agent is a nonflammable solvent such as Freon. 11. Low foam foamed with reaction heat using monofluorotrichloromethane, etc., using a small amount of water as a foaming agent together with a catalyst and a surfactant, and the isocyanate group of the isocyanate compound reacts There is a high-density body in which carbon dioxide gas is generated and foamed. In the present invention, a high-density body having a specific gravity of 0.3 to 0.5 is desirably employed because it is excellent in strength and durability.
[0008]
Tertiary amines or organotin compounds are used for the catalyst, but amines such as tetramethylbutanediamine, triethylenediamine, dibutyltetradilaurate, etc. are used for the high density body. As the surfactant, polyglycol type, silicone type and the like can be used. When a urethane foam resin is cast into a master mold, a mold release agent such as paraffin wax, polyethylene, or Teflon can be coated on the mold surface as necessary to improve mold release.
As required powder coatings, acrylic resins such as methyl (meth) acrylate (ethyl), butyl acrylate, etc., are synthesized alone or copolymerized with thermoplastic resins, polyethylene, and ethylene / vinyl alcohol copolymers. A composition in which a powder of a thermoplastic resin such as a pigment, a pigment, an antioxidant, a plasticizer, a heat stabilizer, an ultraviolet absorber and the like is blended is used.
The powder coating is applied by thermal spraying, electrostatic powder coating or the like. The thermal spraying method is a method in which powder is sprayed and attached to the mold surface from the discharge nozzle together with the flame, while the electrostatic powder coating method is a mold with the opposite polarity to the powder using an air gun or the like. In the present invention, since the master mold is made of resin, the latter electrostatic powder coating method is suitable.
[0010]
The method of wiping is to apply an undercoat to the uneven surface such as the wood grain pattern transferred to the molded product, and if the paint adhering to the convex surface is wiped off by buffing, brazing, etc., the paint will remain in the recess and the finish will be embossed Is obtained. The wiping paint includes acrylic resin-based paint, urethane resin-based, cellulose-based and the like, and those obtained by appropriately blending pigments are used. The paint form may be either emulsion type or solvent type. Even when the wiping coating is employed, a clear paint is applied to further improve the weather resistance. As clear paint, acrylic resin and urethane resin. A paint such as acrylic / urethane resin or acrylic / silicone is applied to a dry thickness of 5 to 30 microns.
[0011]
The master mold can be finished with the shape of the frame of the sample using silicon resin as the casting material, and the appearance that incorporates the surface as it is. Various shapes such as a rectangle, polygon, round, and ellipse are available depending on the design of the door, door, etc. Design, size, etc. can be adopted, and once formed, the master mold can be repeatedly used for molding the frame.
[0012]
The method of attaching the frame body thus processed to the base of doors, doors, and various fittings includes fitting, bonding, sticking, screwing, or a combination of these means to these bases. They are integrated by bonding to the surface of the substrate or by fitting into a groove processed on the substrate.
[0013]
[Action]
In the conventional frame that has been assembled with wood, there is always a gap in the connecting part due to dimensional changes due to environmental conditions, and cracks and peeling of the coating film have always occurred. Since the substrate is formed of a resin, no skiing occurs, so that the coating film on the surface is not cracked or peeled off. Moreover, since it is protected by the barrier layer or further by the clear layer, it is possible to secure a weather resistance of ΔE of 5 or less as defined in JISZ7829 as a weather resistance evaluation method. In addition, since the base portion is made of a foamed urethane resin having a cross-linked structure, the heat resistance is good and there is no thermal deformation.
[0014]
Example 1
The plate body cut out from the tamo material was chamfered to prepare a rectangular sample frame having an assembly length of 1079 mm and width of 341 mm. The sample frame was immersed in the casting silicon resin except for leaving the back surface to cure the silicon resin, and the sample frame was released to prepare a master mold.
Powder coating is performed on the inner surface of the master mold charged with static electricity by using an acrylic resin-based powder coating (average particle diameter of 3 to 30 microns) charged with static electricity opposite to that of the master mold. After applying and adhering to the surface, a nitrified cotton lacquer was applied and dried to form a barrier layer having a dry thickness of about 20 microns. Next, urethane foam resin was injected and cured to form a rectangular frame.
[0015]
Reference example 1
After obtaining a molded frame provided with a barrier layer in the same manner as in Example 1 except that the powder coating was omitted in Example 1, the frame was subjected to wiping coating in which a urethane resin and a color pigment were blended on the surface. A wiping paint was adhered to the concave portion of the wood grain pattern on the body surface, and an acrylic resin-based clear having a dry thickness of about 20 microns was applied to obtain a frame of Reference Example 1 .
[0016]
Comparative Example 1
The sample frame produced in Example 1 was coated with an acrylic resin paint having a dry thickness of about 20 microns to obtain a frame of Comparative Example 1.
[0017]
The frame formed without the barrier layer and powder coating in Example 1 was used as Comparative Example 2.
[0018]
The results of performance tests on the frames of the above examples and comparative examples are shown in Table 1.
[Table 1]
Test evaluation method Weather resistance After irradiation for 200 hours using a super UV tester (model SUV-W13, manufactured by Iwasaki Electric Co., Ltd.), the color difference ΔE is measured with a color difference meter according to JISZ7829.
ΔE is expressed by Equation 1 by lightness ΔL and chromaticity Δa, Δb.
[Formula 1]
Outdoor exposure For 1 year, face south and observe outdoors at 45 degrees to observe the appearance of abnormalities.
Thermal deformation test After 20 cycles of -20 ° C. standing for 10 hours and 80 ° C. for 10 hours, the appearance abnormality is judged.
[0019]
【effect】
The frame according to the present invention is appropriately coated with a barrier layer or a surface of a base made of foamed urethane resin integrally molded using a master mold molded from a male mold processed from a natural material. Further, the one with the clear coating has no seam as in the case of a frame body in which conventional wood is assembled, so that no seam is formed at the seam, and the problems such as cracking and peeling of the coating film at the seam are eliminated. Furthermore, those that have been wiping coated prior to clear coating have the same appearance as natural materials, and thus have high utility values as various members.
In addition, because it is protected by a barrier layer applied to the surface or further by a clear layer, it has excellent weather resistance, and since it is based on a base made of a crosslinked structure, it does not cause thermal deformation, such as entrance doors that have severe use conditions. Even if it is used in places exposed outdoors as a member, it can be used safely for a long time without discoloration or deformation.
Furthermore, even if the frame according to the present invention has a complicated shape such as a circle or an ellipse, once a master mold is prepared, a uniform frame with the same shape can be easily produced. It can contribute to the rationalization of production.
[0020]
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment of a rectangular frame according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
1 Frame 2 Urethane foam resin 3 Barrier layer

Claims (2)

The processed molded master mold of the mold surface on the basis of the male from natural materials, electrostatic powder coating is applied, after the further barrier layer is provided, is molded foamed urethane resin is input Note A frame characterized by being. The processed male the molded based master mold of the mold surface from a natural material, electrostatic powder coating is applied, after the further barrier layer is provided, molded urethane foam resin is input Note A joinery for construction, which is equipped with a frame.