JP3126855B2 - Polymer modified asphalt roofing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a modified asphalt roofing for a torch method.

[0002]

2. Description of the Related Art As a means for installing asphalt roofing on a lower ground such as a roof, there is a torch method, and the outline of the torch method is as shown in FIGS. The polymer-modified asphalt roofing used in this method usually has a sectional structure shown in FIG. In the figure, 1 is a sand or mineral powder, 2 and 4 are polymer-modified asphalt, 3 is a fibrous reinforcing layer, and 5 is a fusible film. The reason for the existence of the fusible film of No. 5 is that this type of roofing material is usually wound up in a roll and transported,
During storage and storage, modified asphalt, which is exposed to direct sunlight and exhibits little tackiness at room temperature, becomes tacky and prevents it from sticking to one layer of sand particles etc. To do that. The torch method using the polymer-modified asphalt roofing is usually performed as follows. That is, as shown in FIGS. 1 and 2, the back surface and the base surface of the rolled sheet of the polymer-modified asphalt roofing are heated to 1100 to 1300 ° C. by a burner flame, and the back surface of the sheet is sufficiently melted, and the asphalt Confirm that a bank (pool) has been formed and 5-1 from the side lap
It was important to work with molten asphalt flowing about 0 mm.

[0003]

In the conventional torch method, it is necessary to melt the polymer-modified asphalt to the above-mentioned state, so that the working speed is at most about 1-2 m / min. Therefore, an object of the present invention is to provide a new modified asphalt roofing for a torch method, which can be constructed only by mild heating and melting, thereby greatly increasing the construction speed.

[0004]

The present invention relates to a modified asphalt roofing for a torch method comprising a surface layer, a polymer-modified asphalt layer, a substrate layer, an asphalt-based room-temperature adhesive layer, and a thin synthetic resin layer. A torch characterized in that a net-like sheet is interposed between an asphalt-based cold-adhesive layer and a synthetic resin thin layer to provide a large number of air layers at the lamination interface between the asphalt-based cold-adhesive layer and the synthetic resin thin layer. It relates to modified asphalt roofing for construction methods.

The present inventors have filed a patent application (reference number HP-001202-1) filed on June 22, 1993,
For example, by embossing, wrinkling or corrugating the thin synthetic resin layer, and then forming it on the asphalt-based room-temperature adhesive layer of the roofing substrate, it is synthesized with the asphalt-based room-temperature adhesive layer. We have proposed a modified asphalt roofing with a large number of air layers at the lamination interface with the resin thin layer for the torch method. However,
In the case of the above proposal, it is necessary to perform a step of imparting unevenness to the synthetic resin thin layer, and it is difficult to increase the number of air layers. Therefore, in the present invention, by interposing a net-like sheet, all the parts where the thread-like material constituting the net does not exist can be easily manufactured as an air layer product. The net-like sheet refers to a sheet having more holes than a part where a thread is present, and a thinner sheet is particularly preferable. Although the shape of the net of the net-like sheet is arbitrary, a commercially available one called a waliff can be used. The net-like sheet is preferably made of a material that melts together with the synthetic resin thin layer when the torch method is applied, since the unmelted thread portion prevents heat conduction and is transmitted to the asphalt-based room-temperature adhesive layer without causing uneven heat. . From this point, the material of the net-like sheet is preferably the same thermoplastic synthetic resin as the synthetic resin thin layer. However, it is also possible to use glass fibers that do not have such properties. Preferred thermoplastic synthetic resins include polyolefins such as polyethylene and polypropylene. Further, the synthetic resin thin layer is preferably colored.
This makes it easier to identify the molten portion.

The surface layer of the present invention can be composed of mineral powder, sand, metal foil or synthetic resin film. The polymer modified asphalt is generally SBS
There are a system type and an APP type, and the representative compositions are as follows. SBS-based composition SBS (styrene / butadiene / styrene block copolymer) 8 to 15 wt% straight asphalt 92 to 85 wt% APP-based composition APP (atactic polypropylene) 30 to 40 wt% straight asphalt 70 to 60 wt% Nonwoven fabrics, mats or woven fabrics made of natural fibers, mineral fibers such as glass, synthetic fibers, etc., alone or blended or blended are used. The asphalt-based room-temperature adhesive is not particularly limited, but SBS is 5 to 30 wt%, preferably 22 to 28 wt% Petroleum resin (tackifier) 0 to 25 wt%, preferably 17 to 23 wt% straight asphalt 25 to 90 wt% Preferably, the oil is 30 to 40 wt%, and the process oil is 5 to 30 wt%, preferably 15 to 25 wt%.

The polymer-modified asphalt roofing of the present invention will be described with reference to FIG. 11 is mineral powder, 12
Is a polymer-modified asphalt, 13 is a base layer such as a synthetic resin nonwoven fabric, 14 is an asphalt-based room-temperature adhesive layer,
Reference numeral 15 denotes a synthetic resin film, for example, a polyethylene film having a thickness of 12 μm. Reference numeral 17 denotes a polyethylene net-like sheet interposed between the asphalt-based room-temperature adhesive layer 14 and the synthetic resin film 15. The thickness of each layer is not particularly limited, but is usually as follows. Mineral powder layer 0.1 to 50 μm, preferably 0.1 to 10 μm Polymer-modified asphalt layer 0.5 to 5 mm, preferably 0.5 to 1.5 mm Base layer 0.4 to 3 mm, preferably 0.8 0.5 to 5 mm, preferably 0.5 to 1.5 mm Net-like sheet 0.05 to 0.5 mm, preferably 0.15 to 0.2 m
m synthetic resin thin layer 5 to 50 μm, preferably 10 to 25 μm

[0008]

【effect】

(1) Compared with the conventional torch method using the polymer-modified asphalt roofing, the torch method using the polymer-modified asphalt roofing of the present invention is more than twice as fast. (2) Despite the use of a layer having room-temperature adhesiveness, no release paper is used, so no waste material is generated. (3) Compared with the conventional torch method of polymer-modified asphalt, the heating time is shorter, so that energy cost is lower, and the degree of heating is lower, so that synthetic fibers constituting the base material may be deteriorated. Extremely low. (4) By using a commercially available net-shaped sheet, a large number of air layers can be easily formed at the laminating interface between the asphalt-based room-temperature adhesive layer and the synthetic resin thin layer, thereby facilitating identification of a molten portion. became.

[Brief description of the drawings]

FIG. 1 is a schematic view of a torch method.

FIG. 2 is a schematic view showing a position of a burner flame in the torch method.

FIG. 3 shows a cross-sectional view of a conventional polymer-modified asphalt roofing.

FIG. 4 shows a cross-sectional view of the polymer modified asphalt roofing of the present invention.

[Explanation of symbols]

 Reference Signs List 1 mineral powder 2 polymer-modified asphalt 3 synthetic fiber nonwoven fabric (base material) 4 polymer-modified asphalt 5 fusible film (synthetic resin film) 11 mineral powder 12 polymer-modified asphalt 13 synthetic fiber nonwoven fabric 14 asphalt-based room temperature adhesive layer 15 synthesis Resin film 16 Air layer 17 Net-like sheet

Continuation of the front page (72) Inventor Hiroyuki Shimamura 1-3-1 Kodai, Adachi-ku, Tokyo Tajima Roofing Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) E04D 5/10-5 / 14 D06N 5/00

Claims (4)

(57) [Claims] 1. A surface layer, a polymer-modified asphalt layer,
In a modified asphalt roofing for the torch method composed of a base material layer, an asphalt-based room-temperature adhesive layer, and a synthetic resin thin layer, by interposing a net-like sheet between the asphalt-based room-temperature adhesive layer and the synthetic resin thin layer A modified asphalt roofing for a torch method, wherein a large number of air layers are provided at a laminated interface between an asphalt-based room-temperature adhesive layer and a synthetic resin thin layer. 2. The modified asphalt roofing for a torch method according to claim 1, wherein said net-like sheet is made of a thermoplastic synthetic resin. 3. The modified asphalt roofing for a torch method according to claim 1, wherein the synthetic resin thin layer and the net-like sheet are both made of a polyolefin-based resin. 4. The modified asphalt roofing for a torch method according to claim 1, wherein the synthetic resin thin layer is colored.