JPH11336266A - Improved asphalt roofing and execution method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide improved asphalt roofing, by which the heating fusion time of the improved asphalt roofing for a torch-applied method is shortened, the efficiency of execution is enhanced without generating unevenness in execution, sufficient adhesion is displayed and a blister preventive effect can also be exhibited as required, and an execution method using the improved asphalt roofing. SOLUTION: A surface layer, an improved asphalt layer A, a base material layer, an asphalt self-adhesive layer B and a thermoplastic synthetic-resin film layer are laminated successively in the improved asphalt roofing. The asphalt self-adhesive layer B consists of a 10-20 wt.% styrene-butadiene-styrene block copolymer, 12-20 wt.% process oil, 30-80 wt.% straight-run asphalt and not more than 30 wt.% fillers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modified asphalt roofing, and a construction method and a joining method using the same.

[0002]

2. Description of the Related Art The asphalt waterproofing thermal method still occupies the mainstream of the waterproofing method in view of its waterproof reliability. However, this construction method tends to avoid construction in densely populated areas due to smoke and smell generated from molten asphalt during work.

One of the alternatives to the asphalt waterproofing thermal method is a torch method. This method uses a torch burner to roast a waterproof sheet in which modified asphalt, which is a blend of asphalt and an elastomer, is thickly coated on both sides of the base material with a torch burner in order to improve the performance and durability at low and high temperatures. The layer is melted and adhered to the substrate.

[0004] The coated surface is usually covered with a thin plastic film to prevent blocking, but a 10 to 15 µm thick film of polyethylene or polypropylene is used so as not to impair the melting property of the coated layer when roasted by a torch burner. Is used.

A method of forming a waterproof layer in the torch method is as follows.
The back surface of the waterproof sheet A is adhered to the base using a torch burner while the coated modified asphalt layer is melted until it is completely fluidized. The waterproof sheet (for example, asphalt roofing) A and the existing The joining of the adjacent waterproof sheets B is generally performed by an overlap method. In this overlapping method, the waterproof sheet A is laminated and integrated while sufficiently heating and melting the overlapping portion of the waterproof sheet B with a burner.

[0006] Adhesion to the substrate and bonding of the sheet are performed almost simultaneously, but the modified asphalt for the conventional torch method does not become molten and flowable unless it is sufficiently roasted with a burner. The construction speed must be extremely slow, for example, on the order of minutes. For this reason, there are many situations in which the worker performs the work without sufficiently heating and melting the sheet with a burner so as to hurry the work. As a result, a water leakage accident has occurred due to adhesion between the base and the sheet or poor adhesion between the sheets. Moreover, due to insufficient heating, it is not possible to obtain a necessary and sufficient adhesive force to the base, and there is a concern that the waterproof layer may blow off during a strong wind such as a typhoon.

On the other hand, moisture is contained in the underlayer, and the moisture evaporates due to a rise in temperature after construction, and the waterproof layer may swell under the influence of the water vapor pressure. The swelling of the waterproof layer is not only unfavorable in appearance, but also causes deterioration of the waterproof layer. Therefore, when the waterproofing layer is swelled as described above, measures are taken to prevent the swelling by partially roasting the sheet, partially bonding the sheet to the base, and allowing the water vapor to escape to the outside through the non-adhered portion. Is taken. Such a method is called a partial bonding method.

In this case, as described above, the method of roasting is insufficient, and the variation in the method of roasting by the operator is apt to occur. In some cases, a necessary bonding area cannot be obtained, and the waterproof layer may not be blown off during a strong wind such as a typhoon. There are concerns. As a measure of roasting, there is a means for printing a mark on the film surface, but if the method of roasting is insufficient, a necessary adhesive strength cannot be obtained. In this way, in the torch method, it is hard to say that the required adhesive strength is always obtained in the case of the partial bonding method, regardless of the entire bonding method, and this leaves anxiety in that respect.

In order to cope with this problem, a method of first laying an asphalt roofing felt with a hole, and bonding only the hole portion of the asphalt roofing felt while roasting the entire surface of the sheet for the torch method from above is also adopted. I have. However, this method requires the use of an extra material for the purpose of partial bonding, which leads to an increase in material cost and labor, which is not preferable.

[0010] Sand particles are usually sprayed on the surface of the waterproof sheet for the purpose of protecting the design and the coated asphalt layer. When these sheets are joined in the longitudinal direction, these sand grains will be a factor inhibiting watertightness.So, the sand grains at the joint are roasted in advance with a burner, and the sand grains on the surface are removed or the sand grains are melt-modified with a trowel etc. A treatment is performed to determine whether the waterproof sheet is buried in the asphalt layer, and then the waterproof sheet is melted and integrated by a burner. This is a very complicated operation, and if the processing is incomplete, watertightness may not be ensured.

The torch method is a water-saving method which is a waste-saving method which can be constructed with a waterproof sheet and a propane gas torch burner, and has a potential to be replaced with an asphalt waterproofing thermal method in the near future. Therefore, improvement of the above-mentioned problems is strongly desired in the market.

[0012]

SUMMARY OF THE INVENTION It is a first object of the present invention to reduce the time required for heating and melting a modified asphalt roofing for a torch method, to improve the working efficiency without causing uneven working, and to achieve a sufficient adhesion. It is an object of the present invention to provide a modified asphalt roofing that exerts power and can also exert a blister prevention effect as required.

A second object of the present invention is to provide a construction method using the above-mentioned modified asphalt roofing.

A third object of the present invention is to provide a novel side joint joining method for modified asphalt roofing.

[0015] A fourth object of the present invention is to provide a novel method for joining a modified asphalt roofing to an end joint.

[0015] A fifth object of the present invention is to provide a waterproof tape useful for the end joint joining method.

[0017]

The first aspect of the present invention is that a surface layer, a modified asphalt layer (A), a base material layer, an asphalt-based self-adhesive layer (B) and a thermoplastic synthetic resin film layer are sequentially laminated. In the modified asphalt roofing, the asphalt-based self-adhesive layer (B) is composed of styrene-butadiene-styrene block copolymer (SBS) 10 to 20 wt% process oil 12 to 20 wt% straight asphalt 30 to 80 wt% filler 30 wt% It relates to a modified asphalt roofing characterized by the following.

In the second aspect of the present invention, an anti-adhesion layer selected from the group consisting of a surface layer, a modified asphalt layer (A), a substrate layer, a modified asphalt layer (A), a synthetic resin film and a particle layer; Striped asphalt-based self-adhesive layer (B)
In a modified asphalt roofing in which a thermoplastic synthetic resin film layer is sequentially laminated, the asphalt-based self-adhesive layer (B) is a styrene-butadiene-styrene block copolymer (SBS) 10 to 20 wt% process oil 12 to The present invention relates to a modified asphalt roofing for preventing blistering, comprising: 20 wt% straight asphalt 30 to 80 wt% filler 30 wt% or less.

A third aspect of the present invention relates to the modified asphalt roofing according to claim 1 or 2, wherein the thermoplastic synthetic resin film is an uneven synthetic resin film.

A fourth aspect of the present invention is the modified asphalt roofing according to any one of claims 1 to 3, wherein only the side wrap portion in the longitudinal direction is replaced with the surface layer,
Melt viscosity at 180 ° C is 100 to 1000 cP, low-temperature bending resistance is 0 ° C or less, softening point is 90 ° C or more, and droop length is 1
The modified asphalt layer according to any one of claims 1 to 3, wherein the modified asphalt layer (C) has a property of exhibiting a completely flowing state at a temperature of 20 ° C or lower and 0 mm and a temperature of 130 ° C or higher.

A fifth aspect of the present invention is that the modified asphalt roofing according to any one of claims 1 to 4 is roasted with a torch burner from the thermoplastic synthetic resin film layer side, and the thermoplastic synthetic resin film melts and disappears. The present invention relates to a method for applying modified asphalt roofing, characterized in that the modified asphalt roofing is adhered to the substrate by the adhesive force of the asphalt-based self-adhesive layer when it looks like this.

A sixth aspect of the present invention is to roast the modified asphalt layer (C) at the portion to be joined in the lateral direction of the modified asphalt roofing (a) according to claim 4 which has already been stuck on the substrate with a torch burner. The present invention relates to a method for joining a modified asphalt roofing to a side joint, wherein the modified asphalt roofing (b) is joined to a laterally joined portion of the modified asphalt roofing (b). The outline of the present invention is shown in the steps of (a), (b), and (c) of FIG. 7, and is as shown in the finished joints (a) and (b) of FIG.

According to a seventh aspect of the present invention, in joining the modified asphalt roofing (former) according to any one of claims 1 to 4 in its longitudinal direction, a surface layer / the modified asphalt layer (C) / a heat-resistant fiber. The release layer of the waterproof tape having a layer structure of a mesh material / adhesive material layer / peeling layer is peeled off, and the modified asphalt roofing (A) is joined in the longitudinal direction using the adhesive layer of the waterproof tape. Temporarily adhered to the surface layer of the waterproof tape, and then roasted the surface of the waterproof tape with a torch burner to melt the modified asphalt layer (C) of the waterproof tape. Paste asphalt roofing (Otsu),
The present invention relates to a method for joining an end joint of a modified asphalt hood which is characterized in that the two are overlapped, pressed and integrated. The outline of the present invention is shown in FIGS.
(C), (d), (e), and (f) are shown in FIG. 9, and a partially enlarged view thereof is shown in FIG.
It is the end joint connection of (Otsu).

An eighth aspect of the present invention relates to a waterproof tape comprising a surface layer, the modified asphalt layer (C), a net made of heat-resistant fibers, an adhesive layer and a release layer.

As the thermoplastic synthetic resin film,
Those having a thickness of about several μm to 20 μm, preferably about 7 to 15 μm can be used. As the thermoplastic synthetic resin, a general-purpose resin having a relatively low melting point is more preferable than a resin having a very high melting point, and polyethylene and polypropylene are preferable from this point.

The pattern and depth of embossing preferably provided on the thermoplastic resin film are not particularly limited, but may be at the interface between the asphalt-based self-adhesive layer (B) and the thermoplastic synthetic resin film. If a very small air layer can be present, when the thermoplastic synthetic resin film is roasted, it is convenient because the film is quickly melted. Is preferred.

Since the asphalt-based self-adhesive layer (B) can be expected to have a phenomenon of wetting due to heat due to torch, it is sufficient that the asphalt-based self-adhesive layer has the minimum necessary adhesiveness at room temperature. Those that demonstrate are preferred.

The asphalt-based self-adhesive layer (B) of the present invention
As a self-adhesive composition mainly composed of modified asphalt, a material which easily melts by the heat of a torch burner or a hot air welding machine and has a sufficient cohesive force in a temperature range under a normal installation environment. Any of them can be used.

Means for imparting self-adhesiveness to the modified asphalt can be obtained by appropriately blending an asphalt with an elastomeric process oil such as a synthetic rubber. In addition, it is necessary to give due consideration to the deviation and droop at high temperature and the durability of the adhesiveness, and the point is the amount of the elastomer and process oil added. In particular, the softening and melting properties during torching greatly depend on the amount of process oil added. Therefore, SBS is particularly used as the elastomer. SBS is suitable in terms of compatibility with asphalt and workability.

In order to check the appropriate relationship between SBS and process oil, an asphalt-based self-adhesive layer having the following composition was prepared.
Its performance was checked. Table 1 shows the results.

[0031]

[Table 1]

From the above results, it was found that when SBS and process oil were used, the following compounding ratios were generally preferred. SBS 10-20 wt%, preferably 13-15 wt% Process oil 12-20 wt%, preferably 13-18 wt% Straight asphalt 30-80 wt% Filler 0-30 wt%

If there is a concern that the waterproof layer may swell due to the moisture contained in the underlayer, the above-mentioned asphalt-based self-adhesive layer may be partially provided, in other words, the non-adhesive portion may be continuous and may be drained. It is preferable to use an asphalt-based self-adhesive layer in which an adhesive portion is formed so as to be a passage. In this case, if the bonding area is 30 to 70%, preferably 40 to 60%, it is sufficient as a ventilation path for guiding the water vapor generated from the base to the outside, and a waterproof layer due to negative pressure under abnormal strong wind such as typhoon. Can also be prevented from scattering.

The anti-adhesion layer made of a synthetic resin film or particles is a layer for preventing the modified asphalt layer (A) corresponding to the portion having no asphalt-based self-adhesion layer (B) from adhering to the base. The synthetic resin film can be arbitrarily selected from general-purpose plastic films, and has a thickness of 5 to 30 μm, preferably 10 to 20 μm, and the particles include inorganic particles such as sand and plastic particles. Organic particles and the like can be used. Inorganic particles such as sand are particularly preferable because they do not melt or disappear when the asphalt-based self-adhesive layer (B) is heated by a torch burner.

In order that the modified asphalt layer (C) can easily show a fluidized state when heated by a burner,
It is necessary that the melt viscosity at 80 ° C. falls within the range of 100 to 1000 cP. If the melt viscosity is less than 100 cP, the melt may be scattered around by the hot air of the burner. The speed decreases, which is not preferable. Furthermore, in order to maintain the function of the waterproof layer after construction without any trouble, the low-temperature property is 0 ° C. or less as a low-temperature property, the softening point is 90 ° C. or more as a high-temperature property, and 0 mm or 130 ° C. at a temperature of 120 ° C. At the above temperature, it is necessary to have the property of exhibiting a completely flowing state.

In order to obtain such properties, low molecular weight polyolefins; petroleum resins of aliphatic type, aromatic type, and aliphatic / aromatic copolymer type are used as additives to asphalt. Particularly, low molecular weight polyethylene and And / or polypropylene, a so-called wax. These resins are extremely hard at room temperature and have a high softening point, but have a feature that the fluidity rapidly increases at a temperature higher than the softening point. However, given these additives alone, the desired low-temperature performance cannot be obtained, so the addition of an elastomer is indispensable. Examples of such elastomers include EVA, S
Preferred are thermoplastic elastomers such as BS, SIS, SEBS, SEPS. By appropriately adding the above additives, the modified asphalt layer (C) which easily exhibits a fluidized state and has predetermined low-temperature / high-temperature performance can be obtained by heating with a burner.

For example, a preferred composition of the modified asphalt layer (C) used in the present invention is a composition comprising 1 to 10% by weight of an elastomer, 5 to 20% by weight of a wax, and 70 to 94% by weight of a straight asphalt.

The thickness of the modified asphalt layer (C) is preferably 1.0 to 1.5 mm. If it is less than 1.0 mm, it will penetrate into the sand surface and will be insufficient in quantity to ensure the watertightness of the joint. When the thickness is 1.5 mm or more, there is not much trouble, but it is inevitable that the melting is delayed.

The modified asphalt layer (A) is required to have weather resistance and durability because it corresponds to the layer immediately below the surface layer (sand grains). In addition, it is preferable that a footprint does not easily form during construction (particularly at high temperatures). Generally, in order to improve the performance of asphalt, a modified asphalt obtained by adding a modifier such as an elastomer or a plastomer to a straight asphalt is used. In terms of compatibility with asphalt, workability, and cost,
SBS (styrene-butadiene-styrene block copolymer) is particularly preferred. In order to satisfy the above-mentioned required performance, it is preferable to add SBS at 7% or more, preferably 10% or more. Table 2 shows specific formulation examples.

Next, the waterproof tape according to the seventh and eighth aspects of the present invention will be described. The specific layer structure is shown in FIG.
Surface layer 21, modified asphalt layer (C) 22, mesh 2
3 and an adhesive layer 24, if necessary.
Has a release layer adhered thereto.

The surface layer is essentially the same as the surface layer according to the first to third aspects of the present invention, and the modified asphalt layer (C) is the modified asphalt layer (C) according to the third aspect. Is the same as

The mesh plays an extremely important role in maintaining the form of the waterproof tape during construction. Therefore, when a waterproof sheet is roasted using a torch burner or a hot-air welding machine, it is indispensable to have heat resistance that does not cause deformation, softening, or melting, and materials having such properties are particularly limited. There is no. The most common material is glass fiber. FIG. 4 shows an example of a net pattern of a net-like object.

The mesh interval of the mesh is preferably 3 to 15 mm. If the thickness is less than 3 mm, the molten modified asphalt is difficult to pass through the mesh, and the molten modified asphalt is difficult to be supplied to the sand surface of the first asphalt-based waterproof sheet. Also, if the mesh interval is 15
When the diameter exceeds mm, the shape retention ability decreases, which is not preferable.

As described above, the mesh has a role of maintaining the shape of the waterproof tape at the time of construction.
It also has the role of providing an indication of the "degree of roasting" as seen by workers. As the mesh gradually emerges on the surface, it is possible to estimate how much of the molten asphalt in the tarpaulin has penetrated into the sand surface of the asphalt tarpaulin. It is possible to prevent the deterioration and the deterioration of the molten asphalt due to excessive roasting.

The pressure-sensitive adhesive is indispensable for temporarily bonding the waterproof sheet of the present invention to an asphalt waterproof sheet. If there is no temporary adhesiveness, the torch burner or the hot wind welding machine may cause the asphalt tarpaulin to be turned up from the joint surface due to the wind, or to be displaced in the case of vertical construction.

The pressure-sensitive adhesive is not particularly limited as long as the pressure-sensitive adhesive has such a degree of adhesiveness as not to cause the above-mentioned turning or displacement to the modified asphalt. Typical examples include an acrylic resin-based adhesive, a rubber-based adhesive, and an asphalt-based adhesive.

The acrylic resin-based pressure-sensitive adhesive includes 2-
Polymers such as ethylhexyl acrylate and n-butyl acrylate, or copolymers containing short-chain alkyl acrylates and methacrylates such as methyl acrylate, ethyl acrylate, methyl methacrylate or vinyl acetate as components having these as main components and giving cohesive force thereto What was done can be used. Alternatively, acrylic acid, methacrylic acid, acrylamide derivatives, hydroxyethyl acrylate, glycidyl acrylate, and the like can also be used as the copolymerization component as a functional monomer serving as a crosslinking point.

As the rubber-based pressure-sensitive adhesive, natural rubber, SB
R, thermoplastic rubber, butyl rubber, and the like can be used, and rosin and its derivatives, terpene resins, petroleum resins, and the like can be used together as a tackifier.

As the asphalt-based pressure-sensitive adhesive, natural rubber, SBR, butyl rubber, styrene-butadiene block copolymer, styrene-isobutylene block copolymer, etc. are added to asphalt, and if necessary, a tackifier or a process A combination of oil and the like can be used.

The thickness of the modified asphalt layer (C) of the waterproof tape is preferably 1.0 to 1.5 mm. 1.
If it is less than 0 mm, it will penetrate into the sand surface of the waterproof asphalt sheet, and will be insufficient in quantity to ensure the watertightness of the joint. When the thickness is 1.5 mm or more, there is not much trouble, but it is inevitable that the melting is delayed.

The waterproofing tape of the present invention may comprise a release layer, an anti-adhesion powder layer or a thermoplastic resin (for example, polyethylene, polypropylene, etc.) which is melted by the heat of a torch burner or a hot air welding machine, if necessary, on the surface of the improved asphalt layer. ) A film layer can be provided. This release layer can be made of the same material as the material forming the release layer provided on the opposite side of the surface layer. For example, a release agent such as silicone coated on a support such as paper or modified asphalt ( In the case of the release layer on the opposite side to this layer, a film made of a polymer having no affinity for the adhesive can also be used. Examples of the anti-sticking powder include sand, various inorganic substance powders, and synthetic resin particles.

[0052]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited thereby.

Example 1 Using the modified asphalt (A) and the modified asphalt (B) having the compositions shown in Table 2 below, the layer structure shown in FIG. 2 mm modified asphalt layer (A) ² , 100 g / m ² polyester spunbond layer 3, 1.5 mm thick asphalt-based self-adhesive layer (B) 4, and 15 μm thick polyester film (Embossed product) 5.) A modified asphalt roofing of the present invention (total thickness 4.0 mm) consisting of 5) was made (see FIG. 1).

Example 2 Using the modified asphalt (A) and the modified asphalt (B) having the compositions shown in Table 2 below, the layer structure shown in FIG. 2 mm modified asphalt layer (A) ² , 100 g / m ² polyester spunbond layer 3, modified asphalt layer (A) 2, thickness 12 μm
m, a polypropylene film 6, a striped asphalt-based self-adhesive layer (B) 4 and a 15 μm-thick polyester film (turtle-pattern embossed product) 5 for preventing blistering according to the present invention (total thickness: 4.30). 0 mm).

Example 3 As shown in FIG. 5, a width of 100 mm corresponding to the ear portion of Example 1 was used.
Only in the region of the above, instead of the sand particle layer (surface layer) 1 and the modified asphalt layer (A) 2, a surface layer 21 and a modified asphalt layer (C) made of a polyethylene film having a thickness of 12 μm are used.
A modified asphalt roofing (total thickness of 4.0 mm) according to claim 4 was prepared by providing the coating No. 22.

Example 4 As shown in FIG. 6, a width of 100 mm corresponding to the ear of Example 2
Only in the region of the above, instead of the sand particle layer (surface layer) 1 and the modified asphalt layer (A) 2, a surface layer 21 and a modified asphalt layer (C) made of a polyethylene film having a thickness of 12 μm are used.
A modified asphalt roofing (total thickness of 4.0 mm) for preventing blistering according to claim 4 was prepared.

[0057]

[Table 2]

The heat fusibility of the modified asphalt (C) in Table 2 was measured as follows. Measurement method A mold formed so as to have a width of 40 mm, a length of 60 mm, and a thickness of 8 mm is placed on an aluminum panel, and 150 mm is placed there.
The compound melted at ~ 200 ° C is poured, and after cooling, the specimen is placed vertically. Then 100V-250W
Was irradiated on the test body at a distance of 50 mm from the test body, and the time until the first drop was dropped and the weight dropped in 5 minutes were measured. The shorter the dropping time and the larger the dropping weight, the better the heat melting property. Table 3 shows the results.

[0059]

[Table 3] It can be said that the modified asphalt (C) has about three times the heat melting property of the modified asphalt (A) for a normal torch method.

Example 5 The modified asphalt roofing obtained in Examples 1 and 3 was applied by the method of the present invention, and the watertightness test was performed by the following method. Building Construction Standard Specification JASS8 The test was performed in accordance with the performance evaluation test method and the water tightness test of the membrane waterproof layer. The waterproof layer was formed so that the side joint and the end joint existed in one place. Specimen: the product of the present invention, conventional torch method n = 3 each It took 30 minutes for the product of the present invention and 100 minutes for the conventional product to prepare one test body.

Example 6 Part 1 (Configuration of Waterproof Tape) (See FIG. 3) (1) Surface layer 21: Polypropylene film (7 μm) (2) Modified asphalt layer (C) 22 Composition: SBS * ¹⁴ 4% by weight PE wax 8% by weight Straight asphalt 84% by weight Other additives 4% by weight 1.2 mm thick layer. * ¹ : SBS is a styrene-butadiene-block copolymer. (3) Net 239 A 200 μm glass thread obtained by twisting 39 μm glass fibers into a plain weave net having a shape as shown in FIG.
The surface of which was coated with an acrylic resin adhesive was used as a net. In each case, the interval between the parallel yarns was 10 mm. (4) Adhesive layer Product name: BPS5375 manufactured by Toyo Ink Co., Ltd. (5) Release layer A waterproof tape made of kraft paper subjected to unevenness processing was produced. FIG. 3 is a sectional view of the waterproof tape. In the figure, 21 is a surface layer, 22 is a modified asphalt layer (C), 23 is a mesh, 24 is an adhesive layer, and a release layer is not shown.

Part 2 (Construction) The outline of the construction process is shown in FIGS. 8A to 8F, and the details are shown in FIG. Asphalt waterproof sheet 11
At the stage where the waterproof tape 12 was pasted on (A) as shown in FIG. 9A and the waterproof tape 12 was roasted from its surface by a torch burner or a hot-air welding machine, and the mesh appeared to appear on the surface. , Asphalt waterproof sheet 13
The joints of (B) were overlapped and crimped. As a result, no gap was generated in the joint portion of the asphalt waterproof sheet, and no water channel was formed here.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a laminated structure of a modified asphalt roofing of Example 1.

FIG. 2 is a sectional view showing a laminated structure of a modified asphalt roofing of Example 2.

FIG. 3 is a sectional view of a waterproof tape used in Example 7.

FIG. 4 is a plan view of a mesh used in Example 7.

FIG. 5 is a sectional view showing a laminated structure of a modified asphalt roofing of Example 3.

FIG. 6 is a sectional view showing a laminated structure of a modified asphalt roofing of Example 4.

FIGS. 7A to 7C are conceptual process diagrams of side joint joining methods according to Examples 3 and 4. FIGS.

FIG. 8 is an explanatory diagram of a seventh embodiment.

FIG. 9 is also an explanatory view of Example 7, and FIG. 9 (a) is a cross-sectional view when a waterproof tape is temporarily bonded to a joint surface in the longitudinal direction of one modified asphalt roofing;
(B) is a cross-sectional view when it is melted by blowing hot air from a torch burner or the like, and (c) is a crimped end joint part of the other modified asphalt roofing to the waterproof tape part, It is sectional drawing at the time of completing a joint.

FIG. 10 is a perspective view showing an example of a finish by the joining method of the present invention.

[Explanation of symbols]

Reference Signs List 1 surface layer 2 modified asphalt layer (A) 3 polyester spunbond layer (base layer) 4 asphalt-based self-adhesive layer (B) 5 thermoplastic synthetic resin film layer (polyester film) (including embossed product) 6 Anti-adhesive layer (polypropylene film) 7 Portion without asphalt-based self-adhesive layer (B) 10 Carrier 11 Asphalt waterproof sheet (A) 12 Waterproof tape 13 Asphalt waterproof sheet (Otsu) 14 Thermoplastic synthetic resin embossed film 21 Surface Layer (thermoplastic synthetic resin film) 22 Modified asphalt layer (C)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Sakamoto 1-3-1, Kodai, Adachi-ku, Tokyo Inside Tajima Roofing Co., Ltd. (72) Inventor Takeyuki Shirai 1-3-1, Kodai, Adachi-ku, Tokyo No. Inside Tajima Roofing Co., Ltd. (72) Inventor Haruyuki Sekine 1-3-1 Kodai, Adachi-ku, Tokyo Inside Tajima Roofing Co., Ltd.

Claims (8)

[Claims] 1. A modified asphalt roofing in which a surface layer, a modified asphalt layer (A), a base material layer, an asphalt-based self-adhesive layer (B) and a thermoplastic synthetic resin film layer are sequentially laminated. The self-adhesive layer (B) is characterized in that it is composed of styrene-butadiene-styrene block copolymer (SBS) 10-20 wt% process oil 12-20 wt% straight asphalt 30-80 wt% filler 30 wt% or less. Modified asphalt roofing. 2. An anti-adhesion layer selected from the group consisting of a surface layer, a modified asphalt layer (A), a base material layer, a modified asphalt layer (A), a synthetic resin film and a particle layer, and a striped asphalt-based self-adhesive layer. In a modified asphalt roofing in which an adhesive layer (B) and a thermoplastic synthetic resin film layer are sequentially laminated, the asphalt-based self-adhesive layer (B) is a styrene-butadiene-styrene block copolymer (SBS) 10 to 20 wt. % Process oil 12 to 20 wt% Straight asphalt 30 to 80 wt% Filler 30 wt% or less Modified asphalt roofing characterized by the following. 3. The modified asphalt roofing according to claim 1, wherein the thermoplastic synthetic resin film is an uneven synthetic resin film. 4. The modified asphalt roofing according to claim 1, wherein only the side wrap portion in the longitudinal direction has a melt viscosity at 180 ° C. of 100 to 1000 cP instead of the surface layer, and has a low-temperature folding endurance. 0 ° C
The modified asphalt layer (C) having the property of exhibiting a property of exhibiting a property of exhibiting 0 mm at a softening point of 90 ° C. or more and a sag length of 120 ° C. or less and a completely flowing state at a temperature of 130 ° C. or more. The modified asphalt hooding according to any of the preceding claims. 5. The modified asphalt roofing according to claim 1, which is roasted by a torch burner from the thermoplastic synthetic resin film layer side, and when the thermoplastic synthetic resin film appears to have melted and disappeared. A method for applying a modified asphalt roofing to a base material, wherein the asphalt-based self-adhesive layer is used to adhere the modified asphalt roofing to a substrate. 6. The modified asphalt layer (C) of the modified asphalt roofing (A) according to claim 4, which has been pasted on a base material, is roasted and melted by a torch burner. A side joint joining method for a modified asphalt roofing, comprising joining a joint portion in a lateral direction of the modified asphalt roofing (b). 7. In joining the modified asphalt roofing (A) according to any one of claims 1 to 4 in its longitudinal direction, a surface layer / the modified asphalt layer (C) / a network made of heat-resistant fiber / A peeling layer of a waterproof tape having a layer structure composed of an adhesive layer and a peeling layer is peeled off, and a surface layer of a portion to be joined in a longitudinal direction of the modified asphalt roofing (instep) using the adhesive layer of the waterproof tape. The waterproof tape is roasted with a torch burner to melt the modified asphalt layer (C) of the waterproof tape, and the other portion of the modified asphalt roofing (B) to be laminated on the melted portion. And paste
An end-joining method for a modified asphalt hooding, wherein the two are overlapped and pressure-bonded to be integrated. 8. A waterproof tape comprising a surface layer, the modified asphalt layer (C), a net made of heat-resistant fibers, an adhesive layer and a release layer.