JP3297462B2 - Waterproof sealing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sealing material capable of easily and completely preventing water from leaking from an overlapping portion or a butt portion of a waterproof sheet.

[0002]

2. Description of the Related Art It is widely practiced to use a waterproof sheet or a waterproof panel to waterproof a desired part such as a flat roof or the like. The joint by the joining method is liable to cause water leakage, and a countermeasure for this location is required.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproof sealing material for completely preventing water leakage from a joint between a waterproof sheet and a waterproof panel.

[0004]

The present invention provides a waterproof seal characterized in that a fluororesin layer, an adhesive layer (b), a metal layer, an adhesive layer (a), a closed cell layer, an adhesive layer and a release sheet are laminated in this order. About materials. INDUSTRIAL APPLICABILITY The waterproof seal material of the present invention is useful as a waterproof seal material for overlapping portions or contact portions of synthetic resin waterproof sheets, asphalt waterproof sheets, and the like. In particular, the waterproof sealing material of the present invention is suitable as a waterproof sealing material for a waterproof sheet having a fluorocarbon resin as a surface layer.

As the closed-cell layer, any closed-cell body such as synthetic resin, natural rubber and synthetic rubber can be used.
It is preferable that the foam is an elastic foam that adapts well to the steps. Examples of the foam material include polyurethane, polyethylene, natural rubber, various synthetic rubbers, and the like.

[0006] After the waterproof sealing material used in the present invention is well adapted to the steps and the contact portions, the metal layer is adapted to the shape of the place so that the waterproof sealing material does not return to the original flat shape. There is no limitation on the type as long as it can perform the function of retaining the shape. Preferred metals include aluminum, lead, tin, zinc, and alloys thereof.

There is no particular limitation on the adhesive used for the adhesive layer. Among the general-purpose adhesives prepared using synthetic resin, synthetic rubber, natural rubber, recycled rubber, or the like as a main raw material, the adhesive property with the base material is not limited. It can be used if it has good durability such as alkali water resistance. However, when the base material is a fluororesin, it is necessary to use a fluororesin adhesive. The following composition can be used for specific examples of pressure-sensitive adhesives which exhibit extremely high effectiveness in common with both general-purpose base materials and fluororesins. SBS (styrene-butadiene-styrene block copolymer) (Shell TR-1118) 30 to 35% by weight Petroleum resin (tackifier) (Exxon Chemical 2101) 45 to 55% by weight Process oil (plasticizer) (Shell 371JY) ) 15-20% by weight

The fluororesin used in the fluororesin layer means a so-called fluororesin. As a typical example, a vinyl fluoride resin PVF (—CH ₂ —
CHF-), vinylidene fluoride resin PVDF (-
CH ₂ —CF ₂ —), ethylene-tetrafluoroethylene resin,
Chlorotrifluoroethylene resin PCTFE (-CF ₂
-CFCl-), ethylene-chlorotrifluoroethylene resin ECTFE, perfluoroalkoxy resin PFA
(Copolymer of CF ₂ CF ₂ and ROCFCF ₂ , R is perfluoroalkyl), perfluoroethylene propylene resin (copolymer of CF ₂ CF ₂ and CF ₃ CFCF ₂ ), ethylene tetrafluoride resin, etc. Can be mentioned, PV
F, PVDF and PCTFE are preferred, and PVF is particularly preferred. Fluororesin has excellent weather resistance, but because it passes ultraviolet rays, the adhesive layer is degraded and easily peels off from the interface with asphalt. Therefore, it is preferable to blend an ultraviolet absorber or a dark colorant in a layer outside the adhesive layer. The use of a dark colorant is preferable because the ultraviolet absorber alone is insufficient. Although there is no particular limitation on the dark colorant, carbon black is preferred because it has the most ultraviolet blocking effect.

As the adhesive layer (a), any material can be used as long as it can bond the metal and the closed cell.
For example, epoxy resin, chloroprene, cyanoacrylate and the like can be mentioned. As a component constituting the adhesive layer (b), any adhesive for a fluororesin can be used. In particular, an acrylic urethane-based or polyester urethane-based adhesive is preferable. It is preferable that the surface of the fluororesin to which the adhesive is applied is subjected to an adhesiveness improving treatment in advance. Known methods such as corona discharge and surface roughening can be used as the adhesion improving treatment.

It is preferable that the waterproof sealing material is used by peeling a release sheet, for example, a release paper, on the adhesive layer side and peeling it off at the time of use. After the waterproof sealing material is adhered, it is preferable that the waterproof sealing material is pressed against the stepped portion by applying a pressing rotary roller (see FIG. 7) having a thickness of 2 to 3 mm so that the waterproof sealing material adheres tightly.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a laminated structure of a waterproof sealing material used in the present invention. 6 is a closed cell layer, 7 is an adhesive layer, 8 is a release sheet, 9 is an adhesive layer (a), and 10 is a metal layer. That is, it is a metal sheet. Talking about the thickness of each layer, the fluororesin layer is usually 15 to 50 μm, preferably 25 to 40 μm, the adhesive layer is 5 to 100 μm, preferably 10 to 50 μm, and the metal layer is 8 to 50 μm, preferably 12 to 25 μm. , The closed cell layer is 0.5 to 5 mm,
Preferably 0.5 to 1.5 mm, the adhesive layer is 50 to 50
0 μm, preferably 100 to 400 μm.

FIGS. 2 and 3 show a specific example in which the waterproof sealing material of the present invention is applied to a stepped portion where the waterproof sheets overlap. FIG. 2 is a top view, and FIG.
It is an X-ray sectional view. At the end of the waterproof sheet (a), a waterproof sheet (b) and a waterproof sheet (c) are overlaid in the same manner as laying tiles. The part a is an area where the three waterproof sheets (a), (b), and (c) overlap,
The part b is the area where the waterproof sheets (b) and (c) overlap, the part c is the area where the waterproof sheets (a) and (c) overlap, and the part d is the area where the waterproof sheets (a) and (b) overlap. The portion e is a region where only the waterproof sheet (a) is provided. The waterproof seal material 1 covers the areas a, d, and e. After the waterproof seal material 1 is adhered, the portion indicated by the arrow in FIG. 3 is pressed by a pressing rotary roller shown in FIG. To completely block water from entering the water.

FIGS. 4, 5 and 6 show a method of applying the waterproof sealing material of the present invention in order to prevent water from entering the mating portion of a partially mating and joining type waterproof sheet. This is for explaining an example. FIG. 4 shows the waterproof sheet (b) partially laid on the waterproof sheet (a),
Next, the waterproof sheet (c) partially overlaps the waterproof sheet (a), but is not overlapped with the waterproof sheet (b), but is laid in a butt-attached form, and the waterproof sheet 2 of the present invention is covered thereon. FIG. 5 is a sectional view taken along line XX of FIG. 4, and FIG. 6 is a sectional view taken along line YY of FIG. Also in these cases, it is preferable to press the location indicated by the arrow in FIG. 5 with a pressing roller.

[0014]

According to the present invention, by using a waterproof sealing material having a specific laminated structure, it is possible to completely prevent water leakage from a waterproof sheet and a waterproof sheet or a joint between a waterproof panel and a waterproof panel.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a waterproof sealing material for illustrating a laminated structure of the waterproof sealing material used in the present invention.

FIG. 2 is a top view showing one specific example of the present invention in which a waterproof sealing material is applied to a step portion where a waterproof sheet overlaps.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a top view showing a specific example of the present invention in which a waterproof sheet is partially laid by a contact method and a waterproof sealing material is applied thereon.

FIG. 5 is a sectional view taken along line XX of FIG. 4;

FIG. 6 is a sectional view taken along line YY of FIG. 4;

FIG. 7 is a schematic view showing an example of a tool used for construction work according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Waterproof sealing material 2 Waterproof sealing material 3 Waterproof sheet bonding part 4 Fluororesin layer 5 Adhesive layer (B) 6 Closed cell layer 7 Adhesive layer 8 Release sheet 9 Adhesive layer (A) 10 Metal layer (A) Waterproof sheet (B) Waterproof sheet (c) Waterproof sheet a Waterproof sheet (a), (b), area where (c) overlapped b Waterproof sheet (b) and area where (c) overlapped c Waterproof The area where the two sheets (a) and (c) overlap d The area where the two sheets (a) and (b) overlap e The area where only the waterproof sheet (a)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-58670 (JP, A) Japanese Utility Model Showa 55-80562 (JP, U) Japanese Utility Model Showa 51-107870 (JP, U) Japanese Utility Model Showa 63- 119637 (JP, U) Japanese Utility Model Showa 61-95519 (JP, U) Japanese Utility Model Showa 59-46229 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C09K 3/10 B32B 5 / 18-5/20 C09J 7/02-7/04 E04D 5/14

Claims (1)

(57) [Claims] 1. A fluororesin layer, an adhesive layer (b), a metal layer,
A waterproof sealing material comprising an adhesive layer (a), a closed cell layer, an adhesive layer, and a release sheet laminated in this order.