JP2006233446A - Building material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building material usable as a lower frame material instead of an expensive stainless steel building material. <P>SOLUTION: The lower frame material 7 is laid to contact with a concrete floor 2, and forms an alkali resistant protective layer on a surface for contacting with the floor 2 of an aluminum or aluminum alloy section having a hard anodic oxide film. A baking painting layer of fluororesin paint and urethane resin paint and an acrylic urethane resin painting layer are suitable for the protective layer. The thickness of the protective layer is suitably set in 8 to 35 μm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a building material suitable as a lower frame material of a frame provided at a doorway of a building.

As the lower frame material of the entrance / exit frame through which the wheelchair / cart is passed, a stainless steel building material with a high surface hardness was used in order to suppress damage by the wheelchair / cart wheel as much as possible.
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  Stainless steel building materials have a problem that they are more expensive than aluminum molds. Therefore, instead of stainless steel building materials, hard anodized films (anodized films made of aluminum or aluminum alloys made by using a low-temperature electrolytic bath or a special electrolytic bath with various organic acids added. Superano It is conceivable to use an aluminum or aluminum alloy mold material having a dicing [trade name] film. The price of the mold material is generally about 20% of the price of the stainless steel building material, and the surface hardness (Vickers hardness) of the mold material is about twice that of the stainless steel building material. Therefore, if attention is paid to the point of price and surface hardness, it is preferable to use a mold material as the lower frame material. However, the mold material has a problem of causing alkaline corrosion from the surface in contact with the concrete. The alkaline corrosion of the mold material occurs because concrete, which is an alkaline material, exhibits strong alkalinity due to the presence of water. And since the said lower frame material is laid so that it may contact concrete in most cases, the said mold material was not able to be used as a lower frame material.

  The present invention has been made in view of such circumstances. The main object of the present invention is to prevent alkaline corrosion of the mold material by forming an alkali-resistant protective layer on a part of the surface of the mold material. The object is to provide a building material that can be used as a lower frame material instead of a building material.

  Another object of the present invention is to provide a building material capable of reliably preventing alkaline corrosion by using a protective layer as a baked coating layer of a fluororesin paint or a urethane resin paint.

In order to achieve the above object, the present invention employs the following means.
The building material according to the first invention is characterized in that an alkali-resistant protective layer is formed on a part of the surface of an aluminum or aluminum alloy mold material having a hard anodized film.

  The building material according to a second aspect is characterized in that the protective layer is a baked coating layer of a fluororesin paint or a urethane resin paint.

  According to the first invention, since the alkali-resistant protective layer is formed on a part of the surface of the aluminum or aluminum alloy mold material having the hard anodized film, the protective layer prevents alkaline corrosion of the building material. I can do it. As a result, a building material that can be used as a lower frame material instead of an expensive stainless steel building material can be obtained.

  According to the second invention, since the protective layer is a baked coating layer of a fluorine resin paint or a urethane resin paint, it is possible to reliably prevent alkaline corrosion of building materials, as will be apparent from the test results described later.

Embodiments of the present invention will be described below.
FIG. 1 is a front view of an essential part of a building 1 in which the building material of the present invention is used as a lower frame member 7 of a frame 6 of an entrance / exit 5, and FIG. 2 is an enlarged end view in which a sliding door 12 along the line II-II in FIG. is there. As shown in FIGS. 1 and 2, the building 1 has a floor 2 and a vertical wall 3, an entrance / exit 5 is formed in the vertical wall 3, and a frame 6 is attached to the entrance / exit 5. The frame 6 includes a lower frame member 7, an upper frame member 8, and left and right vertical frame members 9 and 9. Two sliding doors 12 are slidably guided by two rails 11 of the lower frame member 7 of the frame 6 and rails (not shown) of the upper frame member 8.

  As the upper frame material 8 and the left and right vertical frame materials 9, 9, an aluminum mold material which is entirely covered with an alkali-resistant coating layer but does not have an anodized film is used.

  As the lower frame material 7, the building material of the present invention in which an alkali-resistant protective layer is formed on the surface of the aluminum or aluminum alloy mold material having a hard anodized film that contacts the floor 2 is used. The lower frame member 7 (building material) is located between the rail 11 and the base 11 a having a hollow cross-sectionally deformed rectangular shape, the rail 11 protruding from the upper portion of the base 7 a and having the longitudinal direction directed in the left-right direction. It has a central rib 7b and two ribs 7b at the ends positioned on the opposite sides with the rail 11 in between.

  As the protective layer formed on the surface of the aluminum or aluminum alloy mold material having the hard anodized film that is in contact with the floor 2 (the surface that is in contact with the hatched floor 2 in FIG. 2), a fluororesin paint and A baking coating layer of urethane resin paint and an acrylic urethane resin coating layer are suitable. When the thickness of the protective layer is thin, the function as the protective layer cannot be sufficiently exhibited. On the other hand, when the thickness is too thick, the cost is high, and thus the thickness of the protective layer is preferably 8 to 35 μm.

  When the thickness of the hard anodized film of the lower frame material 7 is too thin, the wear resistance is lowered. On the other hand, when the thickness of the hard anodized film is too thick, the hard anodized film is easily cracked. Therefore, the thickness of the hard anodized film is preferably 20 to 40 μm.

  The vertical frame members 9, 9 are in contact with the left and right end surfaces of the lower frame member 7, and the left and right end surfaces of the lower frame member 7 are not in contact with the concrete.

  Below, in order to confirm the performance of the lower frame material 7 of the present invention, the following test defined in “JIS H 8602” (anodized coating film of aluminum and aluminum alloy) was performed.

Specimen 1 was obtained by wiping a collected piece (sampled from an aluminum mold material having a hard anodized film with a hard anodized film, the same applies hereinafter) before coating with a cloth, and then applying a fluororesin paint and baking at 100 ° C. It is a thing.
The test piece 2 is obtained by wiping a collected piece before coating with a cloth with a cloth, applying a urethane resin paint, and baking at 100 ° C.
The test piece 3 was wiped with a cloth soaked with a thinner in order to make the adhesion of the paint more reliable after wiping the collected piece before applying the paint with a cloth. It is baked.
The test piece 4 was wiped with a cloth containing a thinner in order to make the adhesion of the paint more reliable after wiping the collected piece before applying the paint with a cloth, and applied with a urethane resin paint at 100 ° C. It is baked.
The test piece 5 is a sample obtained by wiping a collected piece before applying a paint with a cloth, and then applying an acrylic urethane resin paint and drying at room temperature.

[Test 1]
"Coating adhesion test (cross-cut test)" (Test specified in 5.5 of "JIS H 8602")
FIG. 3 shows the test results. “100/100” in the column “Adhesiveness” in FIG. 3 indicates that there was no peeling.

[Test 2]
"Alkali resistance test of coating film" (Test specified in 5.11 of "JIS H 8602")
In FIG. 3, the numbers in the column of “hard anodized film thickness” represent the film thickness of the hard anodized film of the test piece, and the unit is “μm”. The number in the column of “composite film thickness” represents the total thickness of the hard anodized film and the coating layer of the test piece, and the unit is “μm”.
“O” in the column “Rating number 9.5 or higher” in FIG. 3 indicates that “Rating number” is “9.5” or higher.

[Conclusion]
As shown in the result of the test 1, the test pieces 1 to 5 satisfy “adhesiveness 100/100” required as a building member, and thus it was confirmed that the test pieces 1 to 5 are suitable for use as a building material.
Moreover, as shown in the result of the test 2, since the test pieces 1 to 5 satisfy the “rating number of 9.5 or more” required as a building member, it can be confirmed that it is suitable for use as a building material. .

It is a front view which shows embodiment of this invention. FIG. 2 is an enlarged end view taken along line II-II in FIG. 1. It is a table | surface which shows the test result based on "JISH8602."

Explanation of symbols

5 Doorway 6 Frame 7 Lower frame material (building material)

Claims (2)

  A building material, wherein an alkali-resistant protective layer is formed on a part of the surface of an aluminum or aluminum alloy mold material having a hard anodized film.   The building material according to claim 1, wherein the protective layer is a baked coating layer of a fluorine resin paint or a urethane resin paint.

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