JP4790640B2 - Manufacturing method of building material made of flocked board - Google Patents

Description

The present invention relates to a method of manufacturing building materials made of flocked sheet available on the roof of a building, such as factories and warehouses.

  Conventionally, metal roofing materials are often used in buildings having large spaces such as factories and warehouses. As this metal roofing material, there is a material in which a flat plate-like metal sheet for roofing is appropriately molded and a backing material made of polyethylene foam or the like having heat insulating properties is bonded to the back surface thereof in order to prevent condensation.

Moreover, as a metal plate material for preventing dew condensation, a flocked steel sheet in which an electrostatic flocking layer made of short fibers is formed on the surface of a surface-treated steel sheet is known (for example, see Patent Document 1).
Japanese Patent No. 3377765

  The backing material made of polyethylene foam or the like may be broken or peeled off during molding or construction. When such a defective part occurs, dew condensation occurs from that part, and there is a disadvantage that the original purpose is not achieved.

  The flocked steel sheet is used for a dew condensation prevention duct, a dew condensation prevention panel, and the like, and the flocking part is less likely to cause the above-mentioned inconvenience than the backing material. Therefore, it is also possible to use a flocked steel sheet as a roofing material, but because this flocked steel sheet has water absorption due to the capillary action of short fibers, when water is absorbed from one end side of the flocked steel sheet, the absorbed water is It easily proceeds to the other end side. Therefore, when flocked steel sheets are used for roofing materials, for example, due to the water absorption characteristic of flocked steel sheets, rainwater is sucked up from parts exposed to wind and rain such as eaves, and rainwater travels through flocked parts inside the building. There is a risk of intrusion.

The present invention is to prevent condensation and rainwater and to provide a method for manufacturing building materials made of flocked plate to prevent the entering into the building.

A method for producing a building material comprising a flocked plate material according to the present invention is a method for producing a building material comprising a flocked plate material having a flocked portion in which short fibers are flocked on one surface of a metal substrate, wherein the tip is tapered. a plurality of heating means having Jo to form a processing tool, arranged at intervals in one direction of the substrate, while pressing the tip to the flocked portion, the heat treatment means in one direction By simultaneously moving and fusing the flocked portion by heating with the heat treatment means, a draining portion made of a coating having a predetermined width that blocks water absorption is continuously formed in one direction, and the flocked portion is divided. There is to do.

  By carrying out such production, the building material can be produced easily and inexpensively.

  In addition, the one surface of a base material means the surface which faces the inner side of a building, when building material is used for a roofing material.

The manufacturing method of the building material which consists of the flocking board material of this invention can manufacture the building material which has the draining part which interrupts | blocks water absorption easily and cheaply.
In addition, the building material manufactured by such a manufacturing method is optimal as a roofing material, can prevent condensation, and can prevent rainwater absorbed from the eaves or the like from entering and entering the building.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a building material 1 made of a flocked plate material according to an embodiment of the present invention. As this building material 1, a metal sheet for roof is illustrated. The building material 1 includes a surface-treated steel plate 2 as a base material, a flocking planting layer 3 formed by applying an adhesive on one surface of the surface-treated steel plate 2, and a short fiber 4 on the flocking planting layer 3 by electrostatic flocking operation. It consists of a flocked short fiber layer (flocked portion) 5 formed by planting.

  Examples of the surface treated steel plate 2 include metal plates such as a hot dip galvanized steel plate, an alloy hot dip galvanized steel plate, an electrogalvanized steel plate, an alloy electroplated steel plate, and a precoated steel plate.

  As the adhesive, those having excellent adhesive strength with the surface-treated steel sheet 2 are preferable.

  Examples of the short fibers 4 to be planted include chemical fibers such as regenerated fibers, semi-synthetic fibers, and synthetic fibers, or natural fibers such as plant fibers, animal fibers, carbon fibers, and glass fibers, and organic fibers and inorganic fibers. It doesn't matter.

Moreover, the draining part 7 which consists of a non-short fiber part is formed in the flocked surface side of the building material 1 so that a flocked part may be parted. The draining portion 7 has a predetermined width W and is continuously formed in one direction of the surface-treated steel sheet 2. For example, when the building material 1 has a long shape, the draining portion 7 is formed in a straight strip shape continuous over the width direction of the building material 1, and the flocked short fiber layer 5 is connected to one side 1 </ b> A of the building material 1 and the other side. Divided into 1B. In addition, the width W of the draining part 7 may not be constant, and the draining part 7 may be curved or bent other than a straight line. The draining section 7 is not limited to a single strip, and a plurality of strips can be provided at predetermined intervals as shown by phantom lines in FIG.

  Next, a method for forming the draining portion 7 will be described. Examples of the method for forming the draining portion 7 include a method in which the flocked portion is fused or burnt off by heating, and a method in which the short fiber layer is mechanically scraped and removed.

  Fig.2 (a) shows sectional drawing of the building material 1 at the time of fusing the flocked part by a heat processing means. Examples of the heating method include various methods such as resistance heating using a nichrome wire or the like as a heat source, induction heating using heat caused by an induced current generated by the influence of magnetic lines of force, heating by friction, and laser heating. As described above, when the draining portion 7 is formed by fusing or burning out the short fibers by the heat treatment means, the surface-treated steel sheet 2 where the draining portion 7 is located has short fibers as shown in FIG. It is in a state of being covered with a film 4a formed by fusion bonding.

  FIG.2 (b) shows sectional drawing of the building material 1 at the time of removing a flocking part mechanically. In such a case, the draining portion 7 is formed by breaking or scraping the short fibers 4 with a processing tool such as a grinder or a scraper. In this method, as shown in the figure, it is possible to prevent the treated film or the like from remaining on the surface-treated steel sheet 2 where the draining portion 7 is located.

  Next, an example of manufacturing the building material 1 will be described. First, a long surface-treated steel sheet rolled up in a roll shape is spread, and after the surface-treated steel sheet is subjected to electrostatic flocking processing to produce a long building material, the flocked steel sheet is Wind up. Then, as shown in FIG. 3, in a molding process different from the electrostatic flocking process, the long building material 1 </ b> A wound in a roll shape is spread and cut into a predetermined length. Then, the flat building material 1 is manufactured.

  Further, as shown in FIG. 4, the heat treatment means 20 is set to a predetermined temperature, and the heat treatment means 20 is heated in the width direction of the building material 1 while heating the flocked portion 5 of the flat roof metal plate 1. Move to. At this time, the heat treatment means 20 fuses the short fiber portion of the flocked portion 5 and continuously forms the draining portion 7 having a predetermined width in the width direction of the flocked portion 5. Although a single heat treatment means 20 may be provided, it is preferable from the viewpoint of work efficiency that a plurality of heat treatment means 20 be arranged at a predetermined interval and moved simultaneously.

The heat treatment means 20 presses the flocked part 5 with a predetermined pressure . Further, the heat treatment means 20 may be fixed and the building material 1 may be moved, or both the heat treatment means 20 and the building material 1 may be moved.

  Furthermore, the flat building material 1 subjected to the draining process is appropriately molded into a roofing material.

  The draining process can be performed at any step after the electrostatic flocking process. As described above, before the building material 1 is cut to a predetermined length (B in FIG. 3), in addition to performing the draining process after cutting the building material 1 by a predetermined length (position A in FIG. 3). Position) or after the building material 1 is molded into the roofing material (C position in FIG. 3), the draining process is performed by cutting the building material 1 into a predetermined length. It is preferable to carry out in the state of a flat plate. This is because processing in the flat state before processing cut into individual lengths makes it easier to set the position of the draining portion, the structure of the processing apparatus is simple, and the cost of the processing apparatus can be reduced. .

  Next, a specific usage example of the flat building material 1 will be described.

  The building material 1 having a predetermined length is molded and processed into a suitable shape and used as a metal roofing material 10 as shown in FIG. Thus, when using it for the metal roof material 10, one side 1A of the building material 1 turns into an eaves side. And the draining part 7 is formed in the boundary part between the part (eave side) exposed to rainwater, and the inside of the building 12. FIG. Specifically, the draining portion 7 is located between the inner and outer surfaces of the outer wall 12a of the building 12 or in the vicinity of the inner and outer surfaces, and is formed in a direction parallel to the eaves edge line (shift direction). FIG. 5 illustrates a case where the draining portion 7 is provided in the vicinity of the outer surface of the outer wall 12a.

  Rainwater that has fallen on the metal roofing material 10 flows from the water to the water under the metal roofing material 10 and is drained from the eaves. At this time, since rainwater circulates to the back surface of the metal roofing material 10, the eaves end is a part that is always exposed to water when it rains. Further, in the case of rain accompanied by wind, the rear surface of the roof material on the outer wall 12a is also easily exposed to water by riding on the flow of wind hitting the outer wall 12a.

  As described above, since the draining portion 7 is located in the vicinity of the outer wall 12a of the building 12 and is formed in a direction parallel to the eaves line, even if the portion exposed to rain water such as the eaves absorbs water, The drainer 7 cuts off the rainwater capillary phenomenon and prevents the rainwater from proceeding. As a result, rainwater can be prevented from entering the building 12 through the flocked short fiber layer 5.

  Actually, the distance from the eaves to the outer wall is different for each building, and the appropriate position of the draining portion 7 is not constant. The appropriate position of the draining portion 7 is set for each building, and may be provided in the vicinity of the eaves curtain plate or the eaves (not shown) of the metal roof material 10, as indicated by 7a in FIG.

  The metal roof material 10 shown in FIG. 6A is formed by forming a trapezoidal rake portion 10a on one side in the width direction and a trapezoidal covering portion 10b on the other side. The covering portion 10b is fitted to the rake portion 10a of another adjacent metal roof material 10 from above. The draining part 7 is provided in the flow direction of the covering part 10b as indicated by a virtual line. In such a case, even if rainwater enters between the scooping portion 10a and the covering portion 10b, the draining portion 7 can prevent rainwater from entering the building. In addition, the draining part 7 can be provided in the arbitrary positions of the covering part 10b.

  Moreover, as shown in FIG.6 (b), the metal roof material 10 may be provided with the scoop part 10a and the cover part 10b which comprise a top fastening part.

  As shown in FIG. 7, the metal roofing material 10 may be a case of lying on the side. In such a case, the draining part 7 is formed in the covering part 10b of the metal roofing material 10 on the ridge side (upper stage).

  In order to confirm the effect of this invention, the test piece which has a draining part and the test piece which does not have a draining part were manufactured, and both comparison tests were implemented.

  The test piece having a draining portion is coated with an epoxy paint (NP365 made by NFC) as an undercoat on the back side of a 55% aluminum-containing galvanized steel sheet (plate thickness = 0.8 mm), and further an epoxy paint as a top coat. A pre-coated steel sheet coated with (NFC RD751) is manufactured, and a water-based adhesive is roll-coated on the pre-coated steel sheet, and immediately thereafter, flocked short fibers made of nylon 66 are electrostatically implanted.

  The treatment method of the draining part employs a heat treatment means, and uses a nichrome soldering iron (output = 100 W, tip temperature = about 320 ° C.) as a treatment tool. The soldering iron was brought into contact with the flocked portion, and heat treatment was performed at a treatment speed of 1800 mm / min.

FIG. 8A shows a test piece A having a draining part manufactured under the above conditions. This test piece A was formed in a rectangular shape in which one piece L1 was 300 mm and the other piece L2 was 200 mm. Drainer 7
The distance L3 from one end of the test piece A was set to 40 mm, and the width W of the draining part 7 was set to about 4 mm. In addition, the test piece which does not have a draining part was also formed in the same shape.

Draining effect confirmation test As shown in FIG. 8B, the test piece A having a draining part is placed in a container 15 and the test piece A having a draining part is 2.5 with respect to the water surface 16a so that the draining part 7 is on the upper surface. It was immersed in water for 24 hours so that the draft position 17 was at a position 20 mm below the draining portion 7 with a gradual slope, and the state of water uptake was confirmed. In addition, the test piece which does not have a draining part was also immersed in water on the same conditions (illustration omitted).

  The test results showed that the test piece without the draining part sucked up 100 mm or more of water from the drafting position 17 in 1 hour and continued to absorb water, whereas the test piece with the draining part had water at the draining part 7. After stopping for 24 hours, the state was maintained, and it was confirmed that the draining effect was sufficient.

It is a perspective view which shows the back surface side of the building material of this invention. The principal part of the building material is shown, (a) is a cross-sectional view when the flocked portion is removed by heating, and (b) is a cross-sectional view when the flocked portion is mechanically removed. It is the schematic which shows the manufacturing method of the building material of this invention. It is a perspective view which shows the method of forming a draining part with the heat processing means. It is the schematic side view which used the building material of this invention as a roofing material. (A) And (b) is the schematic perspective view which used the building material of this invention as a roofing material. It is the schematic perspective view which used the building material of this invention as a horizontal roofing material. (A) is a top view of the test piece of the metal plate for roofs, (b) is sectional drawing which shows the draining effect confirmation test which uses the test piece.

Explanation of symbols

1 Building material 2 Surface-treated steel sheet (base material)
3 Planted planting layer 4 Short fiber 5 Planted short fiber layer (planted part)
7 Drainer 20 Heat treatment means

Claims (1)

A method for producing a building material comprising a flocked plate material having a flocked portion in which short fibers are flocked on one surface of a metal substrate,
A plurality of heat treatment means having a processing tool having a tip formed in a tapered shape are arranged at intervals in one direction of a base material, and the heat treatment means is pressed against the flocked part. By simultaneously moving in one direction, and fusing the flocked portion by heating with the heat treatment means, continuously forming a draining portion made of a coating with a predetermined width that blocks water absorption, A method for producing a building material comprising a flocked plate material, wherein the flocked portion is divided.

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