JP4773144B2 - Asphalt roofing material - Google Patents

Description

The present invention relates to a roofing material that has a rainwater flow channel for ventilation or water flow, and is particularly excellent in slip resistance as a base material for a tile roof.

FIG. 4 is a perspective view showing a conventional general roof structure. In the figure, 1 is a lower covering material installed on the roof base, 2 is a plurality of vertical bars fixed in the gradient direction of the roof, and 3 is provided orthogonal to the vertical bars 2 to lock the tiles. Tile tiles 4 are tiles.
As shown in the figure, since a gap is formed between the tile rail 3 and the vertical rail 2, water leakage, dew condensation, etc. from the roof will flow down in the direction of the arrow, so the tile rail 3, vertical rail 2, etc. There is no risk of corrosion.
However, in the conventional roof tile structure, since it is necessary to attach a large number of vertical beams 2, not only the cost increases but also the construction period becomes longer.

For this reason, Japanese Patent Application Laid-Open No. 2002-146977 and the like propose a underlaying material having a rainwater channel as shown in FIG.
That is, in the figure, reference numeral 11 denotes a roofing material, and this roofing material 11 formed in a sheet shape is obtained by impregnating a base material such as a base paper or a nonwoven fabric mainly made of organic natural fibers with asphalt. The core layer portion 12, the modified asphalt layers 13 and 13 as protective layers adhered to both surfaces of the core layer portion 12, and mineral powder particles are adhered to both surfaces of the modified asphalt layer 13. The surface layers 14 and 14 formed in this manner are formed. On one surface layer 14, a number of rainwater flow paths 15 and 15 communicating with each other are formed.

The rainwater flow path 15 is constituted by a bottom portion and a rising portion formed by the surface layer 14, and the rising portion is constituted by a plurality of droplet-like portions 16 and 16 scattered on the surface layer 14. These drop-like portions 16 are formed by thermally welding a resin material to the surface layer portion 14 as appropriate. When tile roofs (horizontal rails) are stretched over the roof undercarriage 11, rainwater will flow down the rainwater flow path 15 below the tile rails (horizontal rails), eliminating the need for conventional vertical rails. It is.
However, since the drop-like portion 16 is formed on the surface layer 14 formed by depositing mineral powder particles, the drop-like portion 16 sometimes peels off, and as a result, the rainwater flow path may be obstructed. The formation of the drop-like portion 16 also aims at an anti-slip effect, but it is a resin material and may be peeled off, so that the effect is not sufficient.

By the way, what has the structure shown in FIG. 5 conventionally has been used for a long time as a roofing material. In the figure, reference numeral 21 denotes a roofing material, and this roofing material 21 formed in a sheet shape is formed by impregnating a base material such as a base paper or a nonwoven fabric mainly made of organic natural fibers with asphalt. It comprises a base material part 22, asphalt layers 23, 23 adhered to both surfaces of the base material part 22, and finished surfaces 24, 24 formed by depositing mineral powder particles on both surfaces of the asphalt layer 23. ing. The finished surfaces 24 and 24 prevent sticking of the asphalt layer 23 and ensure slip resistance during construction.
However, such a finished surface 24 cannot effectively prevent asphalt seepage, remains sticky, requires careful handling, especially when an operator walks on the construction site, In order not to pollute other construction sites, it was a cumbersome work, such as having to wipe down the feet each time.

  On the other hand, improvement of the working environment is required with the progress of the times, and attention to the aesthetic appearance of the work site is required as part of this. In this regard, the surface of the above conventional roofing material is dark, the asphalt oil oozes out on the surface and no aesthetic elements are taken into account, and the roofing material is stretched. During the installation and laying of tiles and other roofing materials, the foundation part was wrapped in a dark atmosphere, and the construction site as a whole was not clean and amplified a negative image such as dark, dirty, dangerous It is.

As a solution for this, a roofing material shown in FIG. 6 has been proposed. In the figure, reference numeral 31 denotes a roofing material, and this roofing material 31 formed in a sheet shape is formed by impregnating a base material such as a base paper or a nonwoven fabric mainly made of organic natural fibers with asphalt. A base material part 32, asphalt layers 33 and 33 formed on both surfaces of the base material part 32, a finished surface 34 formed by depositing mineral powder particles on one surface of the asphalt layer 23, a front surface, etc. It consists of the nonwoven fabric 35 stuck to the surface.
And the colored part 36 is formed by printing etc. on the surface of this roofing material 31, ie, the upper surface of the finishing surface 34 formed with a mineral substance granule. For this reason, when the underlaying material is stretched on the roof base, the above-described conventional problems are corrected. However, since the colored portion 36 is formed on the mineral powder grain surface, there is a problem that it lacks vividness and easily peels off. These become remarkable when the asphalt is softened, and when the oil content of the asphalt oozes out due to the softening, the color of the colored portion may fade.

In addition, the roof underlaying material related to the above is disclosed in the following documents.

Japanese Patent No. 2741655 Utility Model Registration No. 13330020 Japanese Utility Model Publication No. 3-11730

The present invention has a rainwater flow path that eliminates the need for vertical rails in roofing, and has excellent anti-slip performance, effective asphalt bleeding prevention performance, and beautiful colors and / or pattern surfaces that are hard to disappear and have little discoloration. An object of the present invention is to solve the above-mentioned conventional problems by providing a formed roofing material having environmental compatibility.

The present invention is a roofing material comprising an asphalt layer, a surface finishing material stretched on the top surface thereof, and a covering material affixed to the back surface of the asphalt layer, wherein the surface finishing material has a rainwater channel. A core material having a base material function of an asphalt layer, a resin film covering the core material, and anti-slip means adhered on the resin film. The core material and / or the resin film have a color and / Or a decorative part made of a pattern is formed, the anti-slip means is made of non-woven fabric, the core material is made of paper material, and the rainwater flow path is constituted by a number of protrusions by embossing on the paper material, A water-resistant treatment material is added to the paper material constituting the core material, and the resin film covering the core material of the surface finish material is composed of polyethylene coated on the paper material and a polyethylene film laminated thereon. Rutotomoni, dressings affixed to the bottom of the asphalt layer provides roofing under roofing material constituted by a nonwoven fabric, it is intended to solve the conventional problems described above.

Further, in the underfloor roofing material described in paragraph 0009, a large number of protrusions formed by embossing may be formed in a hemispherical shape, and a number of rainwater flow paths may be formed in communication between the hemispherical protrusions vertically and horizontally. .

The present invention has the following effects by the above configuration.
(B) Since a rainwater channel is formed under the horizontal beam (tile frame) in roofing, a conventional vertical beam is not required.
(B) Excellent anti-slip performance and effective anti-asphalt bleeding performance can be expected. There is no stickiness on the surface, and there is no fear of transferring dirt to other places when walking during construction, so construction efficiency is greatly improved. .
(C) Various colors and / or patterns can be formed on the surface of the roofing material in a vivid manner, and it can be easily contaminated with asphalt oil that has exuded as in the past, or with the removal of mineral sand, etc. Since it does not disappear, it contributes to the improvement of the construction environment that matches the times and has environmental compatibility in a broad sense.

In the present invention, the core material of the surface finishing material may be composed of various materials as long as it is a material that can stably maintain the shape of the semicircular projections by embossing or the like. A paper material is preferable from the standpoint of sex.
Also, the rainwater flow path formed in the core material can have various forms such as grooves formed by a large number of juxtaposed ridges, but it is preferably formed between them by a large number of protrusions by embossing the paper material.
Protrusions caused by such processing do not peel off and contribute to improving the anti-slip performance as well as maintaining the rainwater flow path. Further, the core material contains a water-resistant treatment agent in order to cope with rainwater or the like that flows from the roof material. Furthermore, various coloring can be applied to the surface of the core material, or a predetermined pattern or the like can be printed.

The resin film stretched on the surface of the core material preferably has a double structure of a resin coating formed on the surface of the core material and a resin film adhered on the resin coating. And the nonwoven fabric as a non-slip means is affixed on the surface of a resin film. The anti-slip performance is further improved by the synergistic effect of the anti-slip means and the numerous protrusions formed on the core material.
In the development process of the present invention, initially, a large number of protrusions were formed by embossing a paper core material, and a PE coating was prototyped on this. However, there was a phenomenon that rainwater reached and penetrated the core material, and the anti-slip performance was not sufficient.
Therefore, an anti-slip agent was added to the PE coating, but the result was almost the same as the previous example. The above problem was cleared by laminating the surface finishing material in the order of the core material, the resin film, and the nonwoven fabric.

An embodiment of the present invention will be described below. FIG. 1 is a cross-sectional view of a roofing material according to one embodiment of the present invention. The roofing material 41 includes an asphalt layer 43, a surface finish 42 stretched on the top surface thereof, and a covering material 44 attached to the back surface of the asphalt layer 43.
The surface finishing material 42 includes a core material 42c having a rainwater flow path 46, which will be described later, a resin film 42b covering the core material 42c, and anti-slip means 42a adhered on the resin film.
In the outer embodiment, the core member 42c is made of a paper material, and a large number of hemispherical protrusions 45 are formed by embossing the paper material, and a large number of rainwater flow paths 46 are vertically and horizontally between the protrusions 45. It is configured to communicate.
The anti-slip means 42a is made of a nonwoven fabric.

The asphalt layer 43 according to this embodiment does not have a conventional base material portion inside, and the core material 42c functions as a base material portion, but the asphalt layer 43 is similar to general asphalt roofing. In addition, a base material part formed by impregnating a base material such as base paper or nonwoven fabric with asphalt and an asphalt layer formed on both surfaces of the base material part may be used. There is a possibility that it becomes double and the rigidity becomes excessive.
And the nonwoven fabric as the coating | covering material 44 is affixed on the back surface (lower side in the figure) of this asphalt layer 43 (asphal roofing 43).

The resin film 42b that covers the core material 42c in the surface finish 42 is formed by a PE coating applied to the surface of the paper core material 42c and a PE film affixed thereon.
This resin film is for preventing rainwater that has circulated from roof materials such as tiles from seeping into the paper core material 42c. Further, a water-resistant treatment agent is added to the paper core material 42c to add rainwater or the like. The permeation retention can be avoided.

FIG. 2 is a partial cross-sectional view showing a related configuration of the roofing material 41 and the tile rail (horizontal rail) according to the above embodiment. In the figure, reference numeral 48 denotes a roof base, on which a roofing material 41 made of the surface finishing material 42, the asphalt layer 43, and the covering material 44 is stretched. 47 is a tile rail (horizontal rail) installed on the surface finish 42, and a number of rainwater channels 46 formed between the protrusions 45 of the core member 42 c are provided below the tile rail (horizontal rail) 47. positioned.
Therefore, since the necessary rainwater flow path exists only by installing the tile rail (horizontal rail) 47 at a desired position, a conventional vertical rail is unnecessary.

FIG. 3 is a partially cutaway plan view of a state in which the roof railing material 41 according to this embodiment is laid on the roof base portion and the roof tile 47 is installed. In addition, although many above-mentioned protrusions 45 exist on the upper surface of the roofing material 41 and the rainwater flow path 46 is formed, since it becomes unclear, illustration is abbreviate | omitted.
A pattern as shown in the figure is printed on the upper surface of the surface finish 42, and the pattern is fully developed as the roofing material 41 is spread on the roof base at the construction site. It will be brighter, cleaner, and healthier than ever, and it will be in harmony with the local environment at the site, realizing true environmental compatibility, and improving the work environment will also improve construction efficiency.
In this embodiment, a pattern is drawn, but a desired color may be printed instead of the pattern. Further, the pattern, coloring, etc. can be developed not on the core material but on the resin film, and can be applied to both the core material and the resin film.
As described above, since the coloring, the pattern, and the like are formed on the core material, the resin film, and the like, they are not easily lost as in the prior art.

  As described above, the roofing material according to the present invention is in a state in which the both sides of the asphalt layer are covered with the surface finishing material and the coating material having the above-described configuration, as in the conventional asphalt flooring material. Without sticking out the asphalt, it is possible to completely prevent stickiness.Therefore, even if an operator walks during construction, there is no risk that the contamination due to stickiness will be transferred to another as in the past. There is no reduction in work efficiency due to such concerns.

  The roofing material according to the present invention or the surface finishing material is excellent in slip resistance. That is, a non-woven fabric is stuck on the surface, and the anti-slip performance is remarkably improved as compared with the conventional one by a synergistic effect of this and a large number of protrusions on the surface of the core material.

Next, the performance of the underlaying material according to the above example and the conventional underlaying material according to the figure (second one) were evaluated, and the results were compared.

Performance evaluation test Tensile test: Tear test according to JIS 6022: Low-temperature bending test according to JIS 6013: The test specimen is left in a low-temperature thermostatic chamber at a set temperature for 6 hours, and is quickly taken out for testing. A specimen is wound around a steel rod having a diameter of 5 mm at 80 degrees / 2 seconds, and the limit temperature at which no cracks occur is measured at intervals of 5 degrees Celsius.
Nail hole sealing test: JASS12 Conforms to waterproofing evaluation of roof construction. (Nail type: round nail, water head: 30 mm)
Water flow test: The test body is stopped by a tacker with a 5-inch gradient, a horizontal pier is constructed, and water permeability is confirmed through water from above.
Anti-slip property: The test specimen is applied in a 5-inch gradient, and the anti-slip property of the surface when dry and wet is confirmed.
Stickiness / displacement confirmation: After standing in a thermostatic bath at 60/80 degrees Celsius for 2 hours, the feet are twisted and sticky, and the displacement is confirmed.
Wavy / spreading confirmation: Spread one test piece after one month from manufacture, and check the waviness and appearance.

Evaluation result Example of the present application Conventional example Tensile strength Longitudinal 73 78
(N / cm) Width 42 54
Elongation rate Longitudinal 3.2 2.1
(%) Width 4.1 4.1
Tear strength Longitudinal 22 5.4
(N) Width 23 7.2
Low temperature bending test -10 degrees Celsius pass 5 degrees Celsius pass Nail hole sealing property 0/10 0/10
Water permeability Good Non-slip property Dry Excellent Excellent Good wet Excellent Excellent sticky / deviation confirmation Excellent Impossible undulation and spreading confirmation Good Good Overall evaluation Excellent Good

  From the above comparative tests, it is found that the roofing material according to the present invention is generally superior to the conventional example, but is particularly excellent in terms of anti-slip properties and stickiness prevention.

It is sectional drawing of the roof underglazing material which concerns on one Example of this invention. FIG. 2 is a partial cross-sectional view illustrating a related configuration between a roofing material and a roof rail (horizontal rail) illustrated in FIG. 1. FIG. 3 is a partially cutaway plan view of a tile cross (horizontal cross) in FIG. 2. It is a perspective view which shows the prior art example of the lower covering material which has a rainwater flow path. It is sectional drawing which shows the prior art example of the lower covering material which does not have a rainwater flow path. It is sectional drawing of the prior art example which provided decoration parts, such as coloring and a pattern, on the surface of the underlaying material shown in FIG.

41. . . . . . . . Roofing material 41
42. . . . . . . . Surface finish 42a. . . . . . . Anti-slip means 42c. . . . . . . Core material 42b. . . . . . . Resin film 43. . . . . . . . Asphalt layer 44. . . . . . . . Covering material 45. . . . . . . . Protrusion 46. . . . . . . . Rainwater flow path

Claims (2)

A roofing material comprising an asphalt layer, a surface finishing material stretched on the upper surface of the asphalt layer, and a covering material affixed to the back surface of the asphalt layer, wherein the surface finishing material has a rainwater channel and an asphalt layer. The core material also has a base material function, a resin film covering the core material, and anti-slip means adhered on the resin film, and the core material and / or resin film has a color and / or pattern. The anti-slip means is made of non-woven fabric, the core material is made of paper material, and the rainwater flow path is constituted by a number of protrusions by embossing on the paper material, and the core material is made up A water-resistant treatment material is added to the paper material, and the resin film covering the core material of the surface finish material is composed of polyethylene coated on the paper material and a polyethylene film laminated thereon. Dressing was adhered to the back surface of the asphalt layer roof under roofing material which is characterized by being configured of a nonwoven fabric. The roofing material according to claim 1, wherein a number of protrusions formed by embossing are formed in a hemispherical shape, and a number of rainwater flow paths are formed to communicate vertically and horizontally between the hemispherical protrusions. The roofing material.

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