JP4021524B2 - Under the roof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a roof underlaying material for maintaining the waterproofness of a roof by being interposed between the roofing material and a field board when constructing roofing materials such as tiles, slate systems, and metals.
[0002]
[Prior art]
Conventionally, as roofing materials for ordinary houses, asphalt felt with paper asphalt or pitch impregnated as the core material, blown asphalt mixed with filler on both sides is applied, and talc, silica sand, etc. are applied to prevent adhesion Asphalt roofing with mineral powder particles all over was used.
[0003]
This asphalt roofing exhibits particularly high performance in terms of water resistance and durability because the asphalt itself has excellent hydrophobicity and high decay resistance.
[0004]
[Problems to be solved by the invention]
However, since the asphalt roofing is made by impregnating paper with asphalt, etc., the core material lacks mechanical strength and low-temperature properties, and is blown by strong winds during and after construction on the surface of the field board. When an external force is applied, it may be torn or become brittle in winter, and the bent portion is likely to crack, and there is a risk of water leakage from the cracked portion.
[0005]
In addition, because the core material is paper, not only is the dimensional stability poor due to water absorption / moisture absorption during storage, etc., but it also has poor nail hole sealability, and there are problems such as water leakage from the periphery of the nail. There was a problem.
[0006]
An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a new roofing roof material which is excellent in mechanical strength and low temperature characteristics, does not absorb water and has good nail hole sealing properties.
[0007]
In order to achieve the above object, the present invention provides a waterproof and adhesive material comprising asphalt in which a synthetic fiber nonwoven fabric impregnated with asphalt is used as a core, and 1 to 15% of styrene-butadiene-styrene block copolymer is mixed on both sides thereof. A layer is provided, one of the waterproof / adhesive layer is provided with a mineral particle layer, and the other is provided with a synthetic fiber nonwoven fabric layer imparted with water repellency by spraying a wax solution, etc., to provide high dimensional stability and tear strength. In addition, it has excellent low-temperature characteristics and high nail hole sealability.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 1 is a lower brazing material of the present application, and 2 is a core material of the lower brazing material 1 of the present application. The core material 2 is composed of a synthetic nonwoven fabric 4 impregnated with asphalt 3.
[0010]
Synthetic fiber nonwoven fabric provided with a waterproof / adhesive layer 5 made of asphalt on both surfaces A and B of the core material 2, one of the waterproof / adhesive layer 5 is provided with a mineral particle layer 6 and the other is imparted with water repellency. Each layer 7 is provided.
[0011]
The synthetic fiber nonwoven fabric 4 constituting the core material 2 of the lower brazing material 1 uses a binder type nonwoven fabric having a thickness of 30 to 100 g / m ^{2 in} order to improve heat resistance, and the asphalt impregnated therein is straight asphalt. Regardless of whether it is blown asphalt. Examples of the material fiber include plastic fibers such as vinylon and polyester.
[0012]
The waterproof / adhesive layer 5 is made of asphalt itself, and the base asphalt may be straight asphalt or blown asphalt. Moreover, it is free to mix a filler such as talc and slaked lime as needed in the base asphalt.
[0013]
1-15% of styrene-butadiene-styrene block copolymer (SBS) is mixed in the asphalt constituting the waterproof and adhesive layer 5. This is excellent in improving brittleness at low temperatures and sagging at high temperatures, greatly improving folding resistance at low temperatures and mechanical strength at high temperatures, and also greatly improving nail hole sealability. Because.
[0014]
Here, the SBS content is set to “1-15%”. If it is “less than 1%”, it does not improve low-temperature folding resistance and mechanical strength at high temperatures, and seals the nail hole. It will not increase. On the other hand, "over 15%" increases the cost and cannot be put to practical use.
[0015]
The synthetic fiber nonwoven fabric layer 7 constituting one side (the lower surface in use) of the lower brazing material 1 of the present application has a thickness of 10 to 60 g / m ² and is used to increase the tear strength.
[0016]
The synthetic fiber nonwoven fabric layer 7 imparts water repellency in order to improve the capillary phenomenon. For example, it is possible to impart hydrophobicity by spraying a wax solution onto a synthetic fiber nonwoven fabric. Of course, hydrophobicity may be imparted by other processing methods.
[0017]
Furthermore, the synthetic fiber nonwoven fabric layer 7 is used for preventing adhesion of the surface of the waterproof / adhesive layer 5 and preventing reduction in tear strength, and it is preferable not to impregnate asphalt intentionally.
[0018]
The mineral particle layer 6 constituting one side (upper surface in use) of the lower brazing material 1 of the present application is formed by attaching silica sand or other mineral particles to the surface of the waterproof and adhesive layer 5 made of asphalt containing SBS. This is for preventing adhesion of the waterproof / adhesive layer 5. That is, it is for preventing blocking at the time of storage.
[0019]
In addition, a coating 8 may be applied to the surface of the mineral particle layer 6 in order to prevent the mineral particles from falling off and improve the commercial value.
[0020]
[Example 1]
Commercial 22kg asphalt roofing (the conventional product) was cut into 1 m ² large, mixed with those pegs on the upper surface of the plywood 12mm thick the four corners, on both surfaces of a polyester nonwoven impregnated with asphalt, the SBS10% After applying a waterproof / adhesive layer made of asphalt to a total thickness of 1 mm, silica sand is attached on one side, and a polyester nonwoven fabric provided with water repellency with wax on the other side is provided. The product (Claim 1) is cut into 1 m ² large pieces, and the four corners thereof are nailed to the upper surface of the same base plate, and the water spray corresponding to the rainfall of 12 mm / (hour) is prepared for 24 hours. After the application, the presence or absence of water leakage and the dimensional change were observed. As a result, slack was noticeable in the conventional product and water leaked from the nail hole, but there was almost no change in this product and there was no water leakage.
[0021]
[Example 2]
When a conventional product of asphalt roofing 22 kg and a product of this application shown in Example 1 were wound around a 5 mmφ mandrel at a speed of 180 ° / 2 seconds and the temperature at which cracks did not occur were measured at intervals of 5 ° C., The limit temperature of the product was + 10 ° C, and the limit temperature of the product of the present application was -5 ° C.
[0022]
【The invention's effect】
As described above, the present invention provides a waterproof / adhesive layer made of asphalt in which a synthetic fiber nonwoven fabric impregnated with asphalt is used as a core and 1-15% of styrene-butadiene-styrene block copolymer is mixed on both sides. One of the waterproof / adhesive layers is provided with a mineral particle layer, and the other is provided with a synthetic fiber nonwoven fabric layer imparted with water repellency by spraying a wax solution, etc. In addition to the characteristics such as the property and tear strength, the present invention has the effect of exhibiting excellent low temperature characteristics and nail hole sealing performance.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a lower brazing material of the present application.
FIG. 2 is an enlarged cross-sectional view of a main part of the lower brazing material of the present application.
FIG. 3 is an enlarged cross-sectional view of a main part showing a state in which a paint is applied to the surface of a mineral powder layer of the lower brazing material of the present application.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Undercoat material 2 Core material 3 Impregnated asphalt 4 Synthetic fiber nonwoven fabric 5 Waterproof and adhesive layer 6 Mineral powder layer 7 Synthetic fiber nonwoven layer imparted water repellency

Claims (1)

A synthetic non-woven fabric impregnated with asphalt is used as a core material, and a waterproof / adhesive layer made of asphalt mixed with 1-15% of styrene-butadiene-styrene block copolymer is provided on both sides thereof, and one of the waterproof / adhesive layers is provided. roof underlaying material, characterized in that the mineral powder particle layer, the other respectively provided synthetic fiber nonwoven fabric layer imparted with water repellency by spraying a solution of wax.

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