JP3061348U - Perforated waterproof sheet - Google Patents

Abstract

(57) [Summary] [Object] It is an object of the present invention to provide a perforated waterproof sheet which can improve the waterproof property and reduce the material and operation costs, and can simplify on-site work. A perforated waterproof sheet in which a foamed plastic sheet is perforated with a diameter of 2 to 15 mm at an interval of 3 to 50 mm.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a perforated waterproof sheet used for a building roof, walls, rooftop, balcony, floor, and the like.

[0002]

[Prior art]

 Conventionally, a waterproof sheet is laid on the waterproof construction surface such as a roof, a roof, a balcony, and a floor of a building to prevent rainwater from entering a room.

When such a waterproof sheet is used, the waterproof sheet is laid and fixed by directly hitting the waterproof surface with a fixing means such as a tack or a tacker, or is laid and fixed to the lower surface of the waterproof sheet with an adhesive. Was.

However, when the waterproof sheet is fixed by using a fixing means such as a tack or a tucker, the fixing means is exposed to the outside, and further, the fixing means reaches the base and the tack or the tacker is fixed. Rainwater infiltrated through the perforation of the pit, causing a leak.

[0005] Furthermore, attaching the entire back surface of the waterproof sheet with an adhesive requires skill in the work of applying the adhesive at the construction site, which is troublesome and causes an increase in cost.

[0006] When the entire back surface of the waterproof sheet is adhered to the waterproof construction surface with an adhesive, for example, when cracks occur on the waterproof construction surface, for example, when concrete or the like is cracked. Intrusion of rainwater will occur.

[0007] In the sheet waterproofing method, in addition to the entire surface bonding method of the waterproof sheet, there are a spotting method of partially bonding, a floating method of bonding only the terminal portion of the waterproof layer to the base, and an insulating method. In each case, it took much time to complete the construction work on site, and it was not possible to reduce costs.

[0008] There is a perforated tarpaulin in an asphalt tarpaulin. The purpose of the tarpaulin tarpa- ter is a hole for so-called degassing for removing air. Since the asphalt waterproofing method uses thick coating, air can easily accumulate in the asphalt waterproofing method. Cracks in the foundation such as concrete will cause cracks in the asphalt waterproofing layer. Therefore, a vent hole is required to release air, which is completely different from the purpose of the present invention. In the case of the present invention, on the contrary, it can be used for a waterproofing method that may contain air.

[0009]

[Problems to be solved by the invention]

 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a perforated waterproof sheet that can improve the waterproofness, reduce materials and operation costs, and simplify on-site work.

[0010]

[Means for Solving the Problems]

 In order to achieve the object, a waterproof sheet is made by piercing holes having a diameter of 2 to 15 mm in the foamed plastic sheet at intervals of 3 to 50 mm.

[0011]

[Embodiment of the invention]

 When waterproofing is performed using the perforated waterproofing sheet according to the present invention, even if a crack is formed in the waterproofing surface, the waterproofing sheet itself will be damaged only at the point joints around the cracked part, and the waterproofing sheet itself will be damaged. Absent. The waterproofing method using a perforated waterproof sheet is a point bonding method that lays on the waterproofed surface coated with primer, applies adhesive to the holes of the perforated waterproof sheet, and adheres the area around the holes to the ground. Because you do. By applying a coating film waterproof material on the upper surface of the perforated waterproof sheet, waterproofing can be easily and reliably performed.

[0012] The foamed plastic sheet used for the perforated waterproof sheet is not particularly limited as long as it can easily perforate and has strength. For example, a sheet formed by foaming polyvinyl chloride, polyethylene, polystyrene, polypropylene, or the like, or a laminated sheet using these as a base material. The thickness of the foamed plastic sheet is preferably 0.8 to 2.0 mm.

[0013] The method of forming a hole in the foamed plastic sheet is as follows: a heating plate having projections corresponding to the positions of the holes formed continuously using electric heat or high-temperature steam is brought into contact with the foamed plastic sheet in a short time. Form a hole. In addition, an impulse method using a normal nichrome ribbon, a method using high frequency or ultrasonic waves, and the like can be used. Alternatively, a method of mechanically drilling holes can be used.

The size of the hole of the perforated waterproof sheet is 2 to 15 mm in diameter. If it is less than 2 mm, the adhesive will not flow enough and the adhesive bonding with the waterproof construction surface will be insufficient and it will be easily peeled off. If it is larger than 15 mm, the adhesive strength around the hole will be large and the partial extension of the waterproof sheet will be strong. The perforated waterproof sheet cannot be stuck uniformly.

The distance between the holes in the perforated waterproof sheet is preferably in the range of 3 to 50 mm. If it is less than 3 mm, it will take too much time to complete the construction. If the distance is 50 mm or more, the interval is too large, and the effect of spot joining decreases. The holes may be arranged in a grid pattern or in a staggered pattern.

When waterproofing is carried out using a perforated waterproof sheet, lay it on the primer-applied waterproofing work surface, and apply emulsion-type vinyl acetate resin-based, emulsion-type vinyl copolymer-based, latex-type rubber-based to the holes. Apply a latex-type epoxy-modified rubber-based, epoxy resin-based, urethane-based adhesive, or the like.

[0017] Acrylic, urethane, ethylene-vinyl acetate copolymer, chloroprene, etc. are used as a waterproof coating on the upper surface of the perforated waterproof sheet. Perforated waterproof film is applied to the upper surface of the waterproof sheet by applying an adhesive to the holes in the waterproof sheet, applying a protective coat once or twice in a concave form, and then applying a top coat on it. Apply top coat.

[0018]

【Example】

 Hereinafter, embodiments of the present invention will be described.

Example A 1 mm × 2 m, 1.5 mm thick polystyrene foam sheet was formed with a direct 5 mm hole at an interval of 20 mm each by a heating plate using electric heating to produce a perforated waterproof sheet.

A perforated waterproof sheet is laid on the primer-coated base concrete surface, and an epoxy resin-based adhesive (trade name “Tilement EP-900” manufactured by Tilement Co., Ltd.) is applied to the perforated portion. The area around the hole in the opening waterproof sheet was adhesively bonded to the base concrete surface.

The upper surface of the perforated waterproof sheet is coated with a middle coat twice as a top coat once with a middle coat of a non-combustible emulsion-type acrylic coating waterproofing material (trade name: “Ribor Mighty”, manufactured by RIBOL Co., Ltd.) Done. Thereafter, an artificial crack of 1 mm in width was created on the entire surface of the ground concrete surface, but the perforated waterproof sheet around the crack was peeled off at one joint, and the waterproof sheet was not damaged at all. No abnormalities occurred.

[0022]

[Effect of the invention]

 As described above, the perforated waterproof sheet according to the present invention can greatly simplify on-site work, reduce materials and work costs, and improve high waterproofness and followability with a construction base surface. Was completed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a perforated waterproof sheet.

[Figure 2] Cross section of waterproofing sheet with perforated waterproof sheet

[Explanation of symbols]

 1. Perforated waterproof sheet 2. Hole 3. Foamed plastic sheet 4. 4. Waterproof coating film Adhesive 6. concrete

Claims (1)

[Utility model registration claims] 1. A foamed plastic sheet having a thickness of 3 to 5 mm
A perforated waterproof sheet, characterized in that holes having a diameter of 2 to 15 mm are formed at intervals.