JP2006348686A - Waterproofing method of sheets - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproofing method of sheets in the way that they are mechanically fixed, where judgment is easy on whether each waterproof sheet has been well joined with its fixing metal fittings, and the quality deterioration of waterproof sheets due to temperature rises can be prevented to more improve their durability. <P>SOLUTION: The waterproofing method of sheets is characterized in that fixing metal fittings 3 with their upper surface coated over with a resin for joining together are fixed to a ground body 1 with a fixer, and a transparent or translucent waterproof sheet 5 is laid on and joined with these fixing fittings 3. Then an opaque colored protection layer is formed on the surface of each translucent waterproof sheet 5. The method is also characterized in that the colored protection layer has a reflectivity of infrared rays within a wavelength range of 700 to 2,100 nm, which results in a 40% or more sunlight reflectance . <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sheet waterproofing method for a roof of a building, a veranda, or the like, in which a fixing bracket is first fixed to a casing of a waterproof base, and a waterproof sheet is laid thereon to join the waterproof sheet and the fixing bracket. More particularly, the present invention relates to a sheet waterproofing method that can easily determine the degree of joining between a waterproof sheet and a fixing bracket and has excellent weather resistance.

There is a mechanical fixing method using a fixing bracket as a method of fixing the waterproof sheet to the base casing. In general, a circular stainless steel plate whose surface is covered with a hot-melt adhesive resin or the like is used as the fixing metal fitting. In the mechanical fixing method, first, a fixing bracket is fixed on a waterproof base frame with a plug screw or the like at an arbitrary pitch interval, and a waterproof sheet such as a vinyl chloride resin is laid thereon. Next, the fixing bracket is heated with an electromagnetic induction heating device from above the waterproof sheet located on the fixing bracket, and the heat melts the hot-melt adhesive resin or the like on the surface of the fixing bracket to join the waterproof sheet to the fixing bracket. Or by injecting a solvent that dissolves the waterproof sheet and fixing bracket coating resin with an injection needle or the like from above the waterproof sheet located on the fixing bracket, and joining the waterproof sheet to the fixing bracket to fix the waterproof sheet. It is. In the mechanical fixing method, the joining force between the waterproof sheet and the fixing bracket is greatly influenced by the joining condition of the waterproof sheet and the fixing bracket, and is injected from one side of the electromagnetic induction heating device, misalignment, or an injection needle. In some cases, the coating of the solvent may become uneven. In this case, the bonding force between the waterproof sheet and the fixing bracket is extremely insufficient, so that the waterproof sheet may be peeled off from the fixing bracket or damaged if subjected to strong winds. It will lead to an accident.
Therefore, as a method of determining whether the waterproof sheet and the fixing bracket are completely joined, there is a method of forming a concave continuous ring at the center of the fixing bracket and determining the effectiveness of welding by identifying the ring trace. In this method, since the determination is made visually, there are cases where the determination is difficult due to interference with sunlight depending on the viewing position.
In sheet waterproofing, adjacent sheets are overlapped by 40 to 50 mm and joined with a solvent or heat. At that time, a method of making the sheet translucent so that it can be determined whether or not the sheets are completely joined (for example, patent document) 1) and a method of making a top-coated sheet to be laminated and laminated on the overlapping part and corner part of the sheet transparent and adding a luminescent substance to the sheet (for example, see Patent Document 2). However, there is no suggestion of application to the determination of the bondability between the waterproof sheet and the fixing bracket.

JP-A-1-299947 JP-A-11-201912

Further, the waterproof sheet has a problem of weather resistance deterioration of the waterproof sheet itself due to solar radiation or the like. If the temperature rise due to solar radiation of the tarpaulin can be suppressed, the life expectancy of the tarpaulin is expected, and the energy consumption can be reduced by suppressing the temperature rise of the tarpaulin, to the load on the building and the environment Load is reduced. There is a method to increase the reflectance of the infrared region of the surface layer by kneading light-reflective aluminum powder, metal-deposited mica, etc. into the sheet surface layer, but the surface becomes silver and lacks aesthetics. Since the reflection in the visible light region is high, it is dazzled by the reflected light, which is undesirable in the surrounding landscape.
The waterproof sheet is usually colored in a dark color, and a black pigment is used for toning of each color. Generally, carbon black is used as the black pigment. However, since carbon black easily absorbs infrared rays, it tends to store heat and the surface temperature of the waterproof sheet tends to increase. Therefore, as a black pigment that does not use carbon black, there is a method (for example, see Patent Documents 3 and 4) that increases the infrared reflectivity by adjusting the color by adding an infrared reflective pigment. A method of reducing it has been proposed. These methods are aimed at reducing the surface temperature of building materials to prevent thermal deformation of building materials products and to save energy in buildings, and by reducing the surface temperature of waterproof sheets and suppressing the volatilization of plasticizers, waterproof sheets It has not been suggested to prevent the degradation of.

JP 58-167642 A JP 2002-12679 A

  The present invention provides a sheet waterproofing method in which in a mechanical fixing method, it is possible to easily determine the joining condition of a waterproof sheet and a fixing bracket, and further to suppress deterioration due to a temperature rise of the waterproof sheet and to improve the durability of the waterproof sheet. It is to provide.

  The present invention fixes a fixing bracket whose upper surface is coated with a bonding resin to a base casing with a fixing tool, lays a transparent or translucent waterproof sheet and joins the fixing bracket, and the transparent or translucent waterproof sheet An opaque colored protective layer is formed on the surface of the sheet, and the colored protective layer has an infrared reflectivity with a solar reflectance of 40% or more in a wavelength range of 700 to 2100 nm. It is that.

  According to the present invention, since a transparent or translucent waterproof sheet is used in the mechanical fixing method, it is possible to easily determine the degree of joining between the waterproof sheet and the fixing bracket, and to provide an opaque colored protective layer on the surface. Thus, deterioration of the waterproof sheet due to temperature rise can be suppressed, and durability of the waterproof sheet can be improved.

Hereinafter, preferred embodiments of the present invention will be described in detail.
In the sheet waterproofing method for bonding and fixing the fixing bracket and the waterproof sheet, the present invention can easily determine the bonding condition between the fixing bracket and the waterproof sheet by using a transparent or translucent waterproof sheet. By providing an opaque colored protective layer, deterioration of the waterproof sheet due to temperature rise is suppressed, and the durability of the waterproof sheet is improved.

  The finished structure by the sheet waterproofing method of the present invention is shown in FIG. This is a waterproof structure in which a fixing bracket 3 having an upper surface covered with a fixing resin 2 is fixed on a base casing 1 with a fixing tool 4 and a transparent or translucent waterproof sheet 5 is bonded and fixed thereon.

  Examples of the metal plate of the fixing bracket 3 used in the present invention include various plated steel plates, copper plates, aluminum plates, stainless steel plates, and the like, and those having a circular shape or an elliptical shape are used.

Examples of the bonding resin that covers the surface of the fixing metal include thermoplastic resin or hot-melt adhesive resin that is the same material as the waterproof sheet used.
The thermoplastic resin of the same material as the above waterproof sheet includes vinyl chloride resin, vinyl chloride-urethane copolymer resin, vinyl chloride-ethylene copolymer resin, vinyl chloride-vinyl acetate copolymer resin, and other vinyl chloride resins, urethane resin. , Ethylene-acrylic acid ester copolymer, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-styrene copolymer, thermoplastic elastomer (polyolefin, styrene, polyester, polyurethane, etc.), etc. Is mentioned.
Examples of the hot melt adhesive resin include an ethylene-vinyl acetate copolymer resin system, a polyamide (PA) system, a polyester system, and an epoxy resin.

  The waterproof sheet used in the present invention is transparent or translucent, and has an effect of easily determining the joining condition between the fixing bracket and the waterproof sheet. Furthermore, since the location of the water leakage can be easily identified, it can be repaired accurately and the recurrence of the water leakage can be prevented.

  The waterproof sheet used in the present invention is made of vinyl chloride resin, vinyl chloride-urethane copolymer resin, vinyl chloride-ethylene copolymer resin, vinyl chloride-vinyl acetate copolymer resin, etc., vinyl chloride resin, urethane resin, ethylene-acrylic. Thermoplastic resins such as acid ester copolymers, ethylene-vinyl acetate copolymers, ethylene-propylene copolymers, ethylene-styrene copolymers, thermoplastic elastomers (polyolefin, styrene, polyester, polyurethane, etc.) Is used to form a sheet. Among these, vinyl chloride resin is particularly preferable in consideration of workability, bondability with a fixture, transparency, and weldability.

  In order to facilitate the determination of the degree of joining between the waterproof sheet and the fixing bracket, it is preferable to add a fluorescent whitening agent, a fluorescent colorant, and a phosphorescent agent to the transparent or translucent waterproofing sheet. Is particularly preferred. Examples of the optical brightener include bis (triazinylamino) stilbenzyl sulfonic acid derivatives and bisstyryl biphenyl derivatives.

As an example of the above-mentioned method of determining the joining condition, when comparing the joining part and the non-joining part of the fixing bracket and the waterproof sheet, the joining part appears light in color due to the irradiation of black light, and the non-joining part appears dark in color. Can be easily determined. In addition, depending on the color of the base, it may be easily confirmed without using black light.
The transparent or translucent waterproof sheet used in the present invention can be formed by various conventionally known sheet forming methods such as a calendar method and an extrusion T-die method.

  To the waterproof sheet used in the present invention, a plasticizer, a stabilizer, a lubricant, an ultraviolet absorbent, an antioxidant, fine calcium carbonate, silicon dioxide, etc. are added in order to improve processability and provide other functions. You can also

  Examples of the plasticizer include phthalate ester plasticizers, adipate ester plasticizers, polyester plasticizers, chlorinated paraffins, and epoxidized soybean oil. Examples of the phthalate ester plasticizer include diundecyl phthalate, diisodecyl phthalate, and butyl benzyl phthalate. Examples of the adipate plasticizer include dioctyl adipate and diisononyl adipate.

  Examples of the stabilizer include organotin stabilizers and metal soap stabilizers. Examples of the organic tin stabilizer include di-n-octyltin bis (isooctyl thioglycolate) salt, di-n-butyltin bisoctyl thioglycol ester salt, and the like. Examples of the metal soap stabilizer include calcium stearate, magnesium laurate, barium ricinoleate, and zinc benzoate.

  Examples of the UV absorber include salicylic acid UV absorbers, benzophenone UV absorbers, benzotriazole UV absorbers, and cyanoacrylate UV absorbers. Examples of salicylic acid ultraviolet absorbers include phenyl salicylate. Examples of benzophenone ultraviolet absorbers include 2,4-dihydroxybenzophenone. Examples of the benzotriazole ultraviolet absorber include 2- (2'-hydroxy-5'-methylphenyl) benzotriazole. Examples of cyanoacrylate ultraviolet absorbers include 2-ethylhexyl-2-cyano-3,3'-diphenyl acrylate.

  The opaque colored protective layer formed on the surface of the waterproof sheet in the present invention preferably has a solar reflectance in a wavelength range of 700 to 2100 nm of 40% or more, and more preferably 50% or more. This suppresses deterioration of the waterproof sheet and improves durability. The opaque colored protective layer may be formed by any method, but a method of forming a transparent or translucent waterproof sheet by applying a paint or the like is generally used.

  Examples of the resin component used in the paint include acrylic resins, fluorine resins, vinyl chloride resins, ethylene-vinyl acetate copolymer resins, urethane resins, epoxy resins, and mixtures of these resin components. . The paint can be either water-based or solution-type.

  Coloring agents used in the paints include carbon, phthalocyanine, isoindolinone, perylene, azo, condensed azo, quinacridone, anthraquinone, aniline black, triphenylmethane, and dioxazine. , Titanium oxide-based, iron oxide-based, chromium oxide-based, lead chromate-based, spinel-type fired system, and a colorant having a high solar reflectance in a wavelength range of 700 to 2100 nm can be arbitrarily prepared and toned. it can. In addition, although the use of a carbon-based colorant is not prohibited, in consideration of the solar reflectance in the wavelength range of 700 to 2100 nm, toning with a non-carbon colorant that does not use a carbon-based colorant is preferable.

  For example, in the case of toning of a brown paint, titanium oxide, isoindolinone yellow, phthalocyanine blue, and condensed azo brown are mixed and colored. Although the reflectance in the visible light region does not change much compared to carbon mixed coloring, the solar reflectance in the 700-2100 nm wavelength region is 25% higher than in carbon mixed coloring. Light gray can be colored with non-carbon by mixing titanium oxide, iron oxide, isoindolinone yellow, and phthalocyanine blue, and the solar reflectance in the wavelength range of 700 to 2100 nm is 10% higher than that of carbon mixed coloring. In addition, the effect varies depending on the brightness, and by coloring in a dark color with non-carbon, the reflectance in the wavelength range of 700 to 2100 nm is increased by 20 to 40% compared to carbon coloring, and the sheet temperature is decreased by 10 to 15 ° C. . In addition, when the light color system is colored with non-carbon, the solar reflectance in the wavelength range of 700 to 2100 nm is 5 to 20% higher than the carbon color, the sheet temperature is decreased by about 3 to 10 ° C., and the dark color system and the light color. In both systems, deterioration due to temperature rise of the sheet is suppressed.

  One of the causes of deterioration of the waterproof sheet is that dust or the like adheres to the surface due to aging, and the solar reflectance in the wavelength range of 700 to 2100 nm is deteriorated. Therefore, a flexible transparent paint made of fluorine resin, silicone acrylic resin, or the like is applied to the surface of the opaque colored protective layer, or a flexible transparent paint in which photoactive titanium oxide is added to the paint, It is preferable to perform a stain prevention treatment. Moreover, you may apply | coat the colored coating material whose solar reflectance in a 700-2100nm wavelength range is 20% or more to a sheet | seat surface after aging.

  In order to improve the solar reflectance in the wavelength range of 700 to 2100 nm, a hollow ceramic balloon may be mixed with an opaque colored protective layer. Hollow ceramic balloons include transparent hollow or vacuum hollow balloons with a particle diameter of 1 to 100 μm, preferably 1 to 50 μm. The particle size distribution of the hollow ceramic balloon may be a single shape, but a wide distribution is preferable. When the particle size distribution is wide, small particles enter between particles and the filling rate increases. The addition amount of the hollow ceramic balloon is preferably 1 to 10% by weight based on the solar reflectance and surface strength. Within this range, the solar reflectance can be efficiently improved without reducing the surface strength.

  Moreover, additives, such as a viscosity modifier, a softening agent, a dispersing agent, an antifreeze, can be added to the said coating material as needed.

  EXAMPLES The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

<Example 1>
The composition of the waterproof sheet shown in Table 1 was formed into a sheet by a calendering method to obtain a transparent waterproof sheet having a thickness of 1.5 mm. The obtained transparent waterproof sheet was joined to a fixture with an electromagnetic induction heating device, and used for evaluation of the judgment of joining condition described later. Separately from this, the coating material of Example 1 shown in Table 1 was applied to the surface of a transparent waterproof sheet obtained and dried to form an opaque colored protective layer, which will be described later. It used for each evaluation of a weather resistance test. The evaluation results are shown in Table 1.

<Example 2>
The same operation as in Example 1 was performed except that the paint of Example 2 shown in Table 1 was used. The evaluation results are shown in Table 1.

<Comparative Example 1>
The blended composition of the waterproof sheet of Comparative Example 1 shown in Table 1 was formed into a sheet by a calendar molding method to obtain a colored waterproof sheet having a thickness of 1.5 mm. The obtained colored waterproof sheet was joined to a fixture with an electromagnetic induction heating device and used for evaluation of the judgment of joining condition. Separately, the obtained colored waterproof sheet was directly subjected to evaluations of solar reflectance, sheet temperature increase due to reflex lamp irradiation, and weather resistance test. The evaluation results are shown in Table 1.

<Comparative Example 2>
The blended composition of the waterproof sheet of Comparative Example 2 shown in Table 1 was formed into a sheet by a calendar molding method to obtain a transparent waterproof sheet having a thickness of 1.5 mm. The obtained transparent waterproof sheet was joined to a fixture with an electromagnetic induction heating device, and used for evaluation of the judgment of joining condition. Separately, the obtained transparent waterproof sheet was used for evaluation in a weather resistance test as it was. The evaluation results are shown in Table 1. The evaluation of the solar reflectance and the increase in sheet temperature due to the reflex lamp irradiation was not carried out because it is a transparent sheet and has no meaning.

About the Example and the comparative example, it evaluated based on the following evaluation methods and evaluation criteria.
<Determinability of bonding condition>
The joint between the waterproof sheet and the fixing bracket was visually observed to determine the joining condition.
○: The joining condition could be easily determined.
X: Judgment condition could not be determined.
<Solar reflectance>
According to 5.4 “Optical performance test” of JIS A 5759 “Film for window glass”, the solar reflectance in the wavelength range of 700 to 2100 nm was measured and calculated with a spectrophotometer (V-570 manufactured by JASCO Corporation). .
<Sheet temperature rise due to ref lamp irradiation>
As an indicator of deterioration due to heat storage, the temperature rise of the waterproof sheet by ref lamp irradiation was measured. A 200-watt reflex lamp from a height of 200 mm was irradiated for 30 minutes, and the temperature on the back surface of the waterproof sheet was measured.
○: Less than 55 ° C. Δ: 55 ° C. or more, less than 65 ° C. ×: 65 ° C. or more <Weather resistance test>
A sunshine weather meter (manufactured by Suga Test Instruments Co., Ltd.) was used as a weather resistance test to determine the degree of discoloration after exposure for 5000 hours.
○: No color change △: Some color change ×: Color change

防水シートの配合の単位：重量部
塗料の組成の単位：重量％
他添加剤：粘度調整剤、柔軟剤、分散剤など

Unit for blending waterproof sheets: parts by weight
Unit of paint composition:% by weight
Other additives: viscosity modifiers, softeners, dispersants, etc.

  As is clear from Table 1, according to the sheet waterproofing method of the present invention, the degree of joining between the waterproof sheet and the fixing bracket can be easily determined, and the temperature rise of the waterproof sheet due to the ref lamp irradiation is small. It turns out that it becomes favorable.

  In the present invention, since a transparent or translucent waterproof sheet is used in the mechanical fixing method, it is possible to easily determine the joining condition of the waterproof sheet and the fixing bracket, and to provide a waterproof by providing an opaque colored protective layer on the surface. Deterioration due to temperature rise of the sheet can be suppressed, the durability of the waterproof sheet can be improved, and by removing the colored protective layer, the location of the water leak can be easily identified and repaired accurately, allowing the recurrence of the water leak Therefore, it can be widely applied to waterproof constructions such as verandas and roofs.

Configuration diagram of sheet waterproofing construction method in the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base frame 2 Hot melt adhesive resin 3 Fixing bracket 4 Fixing tool 5 Transparent waterproof sheet

Claims (2)

A fixing bracket with a bonding resin coating on the top is fixed to the base frame with a fixture, a transparent or translucent waterproof sheet is laid and bonded to the fixing bracket, and the surface of the transparent or translucent waterproof sheet is opaque A sheet waterproofing method characterized by forming a transparent colored protective layer. 2. The sheet waterproofing method according to claim 1, wherein the colored protective layer has an infrared reflectivity having a solar reflectance of 40% or more in a wavelength range of 700 to 2100 nm.

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