WO2015025503A1

WO2015025503A1 - Heat-insulating waterproof sheet

Info

Publication number: WO2015025503A1
Application number: PCT/JP2014/004182
Authority: WO
Inventors: 雅貴出口
Original assignee: セーレン株式会社
Priority date: 2013-08-21
Filing date: 2014-08-12
Publication date: 2015-02-26
Also published as: JP6578208B2; JPWO2015025503A1

Abstract

The purpose of the present invention is to provide a heat -insulating waterproof sheet which is for use as a roofing underlayment, which is lightweight and ensures excellent working, and which exhibits excellent slip preventive properties, heat- insulating properties and durability. A heat-insulating waterproof sheet characterized by having an at least seven-layer structure obtained by laminating a slip preventive layer (2), a film layer (3), a first anchor coat layer (4), a metal film layer (5), a second anchor coat layer (6), an adhesive layer (7) and a nonwoven fabric layer (8) in this order from the vertically upper side.

Description

Thermal barrier sheet

The present invention relates to a heat insulating waterproof sheet.

Conventionally, in order to prevent rainwater from entering the roofs of wooden houses, roofing materials such as roof tiles, slate, metal plates, etc., and asphalt are used.

In recent years, from the viewpoint of improving the comfort of living and saving energy, a thermal barrier waterproof sheet that reflects the radiant heat emitted from the roofing material heated by sunlight is provided with a metal film layer on the waterproof sheet for the roof under the roof. Has been. As a construction method, there are a case where a heat insulating waterproof sheet is used instead of asphalt roofing, and a case where a heat insulating waterproof sheet is further spread on the asphalt roofing and then double-rolled.

However, the environment to which the heat-shielding waterproof sheet is exposed is harsh, and there are cases where alkaline water that comes out when acid rain or the roofing material gets wet adheres, or is placed in a hot and humid situation. Under this environment, the metal film layer for exhibiting the heat shielding performance is easily corroded and deteriorated. Therefore, even if a thermal insulation waterproof sheet provided with a metal film layer is applied, the thermal insulation performance may be impaired.

In addition, there was a problem that the house was easily shaken in the event of an earthquake because the entire roof would become heavy when used for double fired.

In order to solve these problems, a heat insulating waterproof sheet having a protective layer on the metal film layer has been developed. For example, in Patent Document 1, a resin having an anti-slip effect is coated on approximately 20% or less of the area on the surface of the aluminum foil, and a two-component reactive urethane adhesive is used on the back surface of the aluminum foil as a reinforcing material. A heat insulating waterproof sheet in which paper or non-woven fabric is bonded by a dry lamination method is described.

However, since the non-slip resin on the surface of the thermal insulation waterproof sheet is not a uniform film as a protective layer, aluminum is corroded. Also, the back surface is not easily formed with a uniform protective film only by applying an adhesive by a dry lamination method, and is easily corroded.

Patent Document 2 discloses a thermal barrier waterproof sheet in which a film as a protective layer and a porous polyolefin film are laminated on both sides of a metal vapor-deposited film, and a nonwoven fabric is laminated as a reinforcement.

However, since this thermal insulation waterproof sheet is not subjected to anchor treatment for improving adhesion between the metal vapor-deposited film and the film as the protective layer, the film and the metal vapor-deposited film are easily peeled off. Rainwater, etc. infiltrates from the part and becomes susceptible to corrosion. In addition, components such as oil components that cause deterioration or corrosion from the pores of the porous polyolefin film may enter, or the function as a protective layer may be weak, which may cause corrosion.

JP 2005-611146 A JP 2010-184451 A

In order to solve the above-described problems, the present invention provides a heat-insulating waterproof sheet that has sufficient heat-insulating properties and anti-slip properties, is lightweight, and is excellent in durability of a metal film layer.

The heat-insulating waterproof sheet of the present invention is provided with an anti-slip layer, and a film layer, a first anchor coat layer, a metal film layer, a second anchor coat layer, an adhesive layer, and a non-woven fabric layer are integrated in that order. Is.

The first anchor coat layer is acrylic, styrene, acrylic-styrene copolymer, vinyl chloride, vinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polycarbonate, nitrocellulose, urethane. It is preferably made of a mixed material of one type or two or more types, melamine type, and epoxy type, and has a thickness of 0.4 to 4.0 μm.

The metal film layer is preferably made of aluminum and has a thickness of more than 300 mm and less than 30000 mm.

In the second anchor coat layer, an epoxy-based, isocyanate-based, or melamine-based curing agent is added to one or more mixed materials of polyester-based, acrylic-based, urethane-based, isocyanate-based, imine-based, and polybutadiene-based materials. It preferably contains a silane coupling agent having at least one kind of organic functional group, alkoxy group, amino group, epoxy group and isocyanate group, and has a thickness of 0.4 to 4.0 μm.

In the exposure promotion evaluation, the infrared reflectance at a wavelength of 2 μm is preferably 80% or more.

The heat-insulating waterproof sheet of the present invention has sufficient heat-insulating properties and slip-proof properties, is lightweight, and has an excellent effect on the durability of the metal film layer.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which showed the typical cross section of the thermal insulation waterproof sheet which is an example of embodiment of this invention.

An embodiment of the thermal insulation waterproof sheet of the present invention will be described with reference to FIG. As shown in FIG. 1, the thermal barrier waterproof sheet 1 according to the present embodiment is provided with a film layer 3 under the anti-slip layer 2, and under the film layer 3 with a first anchor coat layer 4. Further, a metal film layer 5 is provided under the metal film layer 5, a second anchor coat layer 6 is provided under the metal film layer 5, and an adhesive layer 7 is further provided thereunder. 8 is provided.

The thermal insulation waterproof sheet 1 includes a first anchor coat layer 4 and a second anchor coat layer 6 formed on the upper and lower surfaces of the metal film layer 5 so that the upper and lower surfaces of the metal film layer 5 are covered, and a protective layer that suppresses corrosion. Therefore, the deterioration of the heat-shielding property with time is suppressed, the adhesion with the film layer 3 and the adhesive layer 7 is further improved, the invasion of moisture which is the main cause of corrosion is suppressed, and excellent durability is exhibited. The heat-insulating waterproof sheet 1 is obtained.

Moreover, since the heat-insulating waterproof sheet 1 is lightweight, it has good workability and is suitable for double firing. Furthermore, it is hard to slip | slide by the anti-slip | skid layer 2 in which the fine unevenness | corrugation was formed in the surface, and the slip at the time of an operator walking on the sheet | seat surface can be reduced.

The resin used for the anti-slip layer 2 is preferably one that can impart anti-slip properties, water repellency and friction resistance on the film layer 3. As a specific resin, it is preferable to use one or two or more kinds of mixed materials such as polyurethane, acrylic, epoxy, vinyl acetate, polyester, cellulose, phenol, and melamine. In particular, an acrylic resin as a main ingredient is preferable because it is an additive and easily exhibits anti-slip properties, water repellency and friction resistance, has good adhesion to the film layer and easily exhibits durability.

Further, it is preferable to add a crosslinking agent to the resin used for the anti-slip layer 2 from the viewpoint of friction resistance and durability. As the cross-linking agent, isocyanate-based, carbodiimide-based, isothiazoline-based, carbodilite-based cross-linking agents can be used. In particular, an isocyanate-based cross-linking agent is preferable because it has good reactivity and high friction resistance and durability. As the addition amount of the crosslinking agent, it is preferable to add 0.1 to 20 parts by weight with respect to 100 parts by weight of the resin in order to sufficiently exhibit the friction resistance effect. If the amount is less than 0.1 parts by weight, crosslinking may be insufficient. If the amount exceeds 20 parts by weight, excess crosslinking agent may remain unreacted, and none of them may provide sufficient friction resistance. There is.

Further, it is preferable to add an inorganic powder or a thermal expansion foaming agent to the anti-slip layer 2. By adding these, fine irregularities are formed on the surface of the anti-slip layer 2, the friction coefficient is increased, and the anti-slip property is improved. Silica, calcium carbonate, titanium oxide, zinc oxide, magnesium carbonate, etc. are used as the inorganic powder, and as the thermal expansion foaming agent, a powder in which hydrocarbon is enclosed inside a microcapsule made of a thermoplastic polymer is used. Used. It is preferable to use a thermal expansion foaming agent from the viewpoint of coating unevenness at the time of coating and frictional resistance. The average particle diameter of the thermal expansion foaming agent is preferably 5 to 50 μm, and the expansion ratio is preferably 2 to 20 times. If the average particle diameter is less than 5 μm and the expansion ratio is less than 2 times, unevenness is not easily formed on the surface, a sufficient anti-slip effect is not exhibited, the average particle diameter exceeds 50 μm, and the expansion ratio is 20 times. If it exceeds, the thermal expansion foaming agent may protrude from the resin used for the anti-slip layer and fall off, and the adhesion between the anti-slip layer 2 and the film layer 3 may be impaired. The hydrocarbon encapsulated in the thermal expansion foaming agent is preferably a low boiling point hydrocarbon such as n-butane, i-butane, pentane, or neopentane. The amount of the thermal expansion foaming agent added is preferably 20 to 100 parts by weight with respect to 100 parts by weight of the resin of the anti-slip layer 2. When the addition amount is less than 20 parts by weight, a sufficient anti-slip effect is not exhibited, and when it exceeds 100 parts by weight, the adhesion between the anti-slip layer 2 and the film layer 3 may be impaired.

Also, it is preferable to add a water repellent to the resin of the anti-slip layer 2 so that the anti-slip property can be maintained even when the surface of the heat-insulating waterproof sheet 1 gets wet in the rain. As the water repellent, a fluorine resin, a silicone resin, a hydrocarbon resin, or the like can be used.

The anti-slip layer 2 is formed by a known coating method such as a roll coating method, a gravure coating method, a reverse coating method, or a spray coating method. The coating amount of the anti-slip layer 2 does not certain, but if less than 1.0 g / m ^2, there may not sufficient slip effect is obtained, and when it exceeds 15 g / m ^2, the coating unevenness of the surface layer In view of the possibility of the occurrence, it is preferable to select appropriately from the range of 1.0 to 15 g / m ² .

The film used for the film layer 3 preferably has a tensile strength of 140 Mpa or more in the longitudinal direction and 180 Mpa or more in the width direction. When it is less than this strength, even if it is in the state of the laminated thermal insulation waterproof sheet 1, it may be broken during work. Moreover, after constructing the heat-insulating waterproof sheet 1 on the roof surface, if the user walks on the roof, tearing may occur due to a load applied on walking.
Therefore, the thickness of the film is preferably in the range of 10 to 300 μm. If the thickness is less than 10 μm, sufficient strength may not be obtained. If the thickness exceeds 300 μm, not only is it difficult to wind the thermal insulation waterproof sheet 1 in a roll shape, but the feeling of lightness is impaired and workability deteriorates.

Here, the longitudinal direction and the width direction of the film refer to the production flow direction of the continuously produced film as the longitudinal direction and the direction perpendicular to the production flow as the width direction.

The film layer 3 is composed of one or more mixed materials selected from the group consisting of polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polymethylene terephthalate, polyamides such as nylon and aramid, and polyurethanes. A polymer material is preferred. Of these, polyesters and polyolefins are preferred from the viewpoints of processability, strength, dimensional stability, and hydrophobicity.

The film production method is not particularly limited, and a film produced by a known production method such as an inflation method, a T-die method, or a casting method is used.

As an anchoring agent for forming the first anchor coat layer 4, there must be adhesion with metal and vapor deposition, and excellent adhesion with the film layer 3. To satisfy this, any one of a thermoplastic resin, a thermosetting resin, an electron beam curable resin, and an ultraviolet curable resin is used. For example, acrylic, styrene, acrylic-styrene copolymer, vinyl chloride, vinyl acetate, vinyl chloride-acetic acid vinyl copolymer, polyvinyl butyral, polycarbonate, nitrocellulose, urethane, melamine, epoxy 1 type, or 2 or more types of mixed materials are used, or what added hardening agents, such as an epoxy type, an isocyanate type, and a melamine type, to these resins is used.

The first anchor coat layer 4 is formed using a known coating method such as a roll coating method, a gravure coating method, a reverse coating method, or a spray coating method for the resin. Do by. From the viewpoint of ease of processing, a gravure coating method is preferable.

Also, the thickness of the first anchor coat layer 4 is not specified, but if it is less than 0.4 μm, there is a risk that sufficient adhesion with the metal film may not be obtained, and if it exceeds 4.0 μm, coating spots occur. Since pinholes are likely to occur, it is preferable to select appropriately from the range of 0.4 to 4.0 μm.

The metal used for the metal film layer 5 is preferably a material selected from the group consisting of aluminum, nickel, stainless steel, silver, and chromium, which are radiant heat reflecting metals. Among these, aluminum is preferable from the viewpoints of the heat shielding effect, economy, and workability.

Examples of the method for forming the metal film include a method of laminating foils, a plating method, a vapor deposition method, and a sputtering method, which are known processing methods for forming a thin and uniform metal film on a substrate. The vapor deposition method is preferable from the viewpoint of workability and economy.

The metal film is preferably thicker than 300 mm and thinner than 30000 mm. When the thickness of the metal film is 300 mm or less, the heat shielding property is weak because the reflectance is low, and the first anchor coat layer is also uneven due to fine unevenness on the film surface, so that the deposited film is easily uneven, and radiant heat reflection The heat shielding effect due to is insufficient. Also, corrosion of the metal is likely to proceed. If it is 30000 mm or more, the heat-insulating waterproof sheet 1 becomes hard and difficult to wind in a roll shape, and the metal film may break and is difficult to cut, resulting in poor workability.

The anchor agent for forming the second anchor coat layer 6 needs to have excellent adhesion with the metal film and adhesion of the adhesive layer 7. As satisfying them, one or two or more mixed materials such as polyester, acrylic, urethane, isocyanate, imine, polybutadiene, etc. are used, or these resins are epoxy, isocyanate, The thing which added hardening | curing agents, such as a melamine type, is mentioned.

Further, the anchor agent preferably contains a silane coupling agent having at least one organic functional group. Examples of the organic functional group include an alkoxy group, an amino group, an epoxy group, and an isocyanate group.

The second anchor coat layer 6 is formed by any known coating method such as a roll coating method, a gravure coating method, a reverse coating method, or a spray coating method using the anchor agent containing the resin. From the viewpoint of ease of processing, a gravure coating method is preferable.

Further, the thickness of the second anchor coat layer 6 is not specified and is the same as that of the first anchor coat layer 4, but if it is less than 0.4 μm, there is a possibility that sufficient adhesion with the metal film may not be obtained. If the thickness exceeds 0.0 μm, coating spots may occur and pinholes may be generated. Therefore, it is preferable to select appropriately from the range of 0.4 to 4.0 μm.

The resin used for the adhesive layer 7 may be one or a mixture of two or more of polyolefin, polyester, polyamide, acrylic, vinyl chloride, vinyl acetate, urethane, silicone, epoxy, and the like. .

The bonding method between the second anchor coat layer 6 and the nonwoven fabric layer 8 is performed by a known laminating method such as a dry laminating method, an extrusion laminating method, a hot melt laminating method, a wet laminating method, or a thermal laminating method. In order to produce a uniform film having good workability and excellent economic efficiency and a high protective effect on the metal film, an extrusion laminating method using a polyolefin-based adhesive resin is preferable.

The thickness of the adhesive layer 7 is preferably 10 to 100 μm. If it is less than 10 μm, there is not sufficient adhesion, and the protective effect of the metal film tends to be weakened by water entering from the gap, and if it exceeds 100 μm, the thermal insulation waterproof sheet 1 is not easily wound in a roll shape, Lightness is lost and workability is deteriorated.

The nonwoven fabric used for the nonwoven fabric layer 8 preferably has a tensile strength of 25 N / cm or more in the longitudinal direction, 20 N / cm or more in the width direction, and a tear strength of 10 N or more in the longitudinal direction and 8 N or more in the width direction. If this strength is not satisfied, even if the thermal insulation waterproof sheet 1 is in a laminated state, it may be torn or torn during the work, and after the thermal insulation waterproof sheet 1 is constructed on the roof surface, May be broken by a load applied when walking, or may be torn from a nail portion such as staples driven to fix the heat-insulating waterproof sheet 1 to the roof plate surface.

In order to satisfy the above strength, the basis weight of the nonwoven fabric is preferably in the range of 60 to 300 g / m ² . If it is less than 60 g / m ² , sufficient strength may not be obtained. If it exceeds 300 g / m ² , the thermal insulation waterproof sheet 1 is not easily wound in a roll shape, but the lightness is impaired and workability is reduced. May be worse.

The nonwoven fabric layer 8 is a polymer material made of one or more mixed materials selected from the group consisting of polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polymethylene terephthalate, and polyamides such as nylon and aramid. It is preferable that Of these, polyesters and polyolefins are preferred from the viewpoints of processability, strength, dimensional stability, and hydrophobicity.

Moreover, the manufacturing method of a nonwoven fabric is not specifically limited, The nonwoven fabric manufactured by well-known manufacturing methods, such as a spun bond method, a melt blow method, a thermal bond method, a chemical bond method, a needle punch method, can be used.

If necessary, an anti-slip layer, a film layer, a nonwoven fabric layer, an adhesive layer, a metal film layer, and an anchor coat layer may be further provided. What is necessary is just to select suitably according to the objective and use. Specifically, in order to further improve the infrared reflectance, a metal film layer is laminated on the first anchor coat layer, and an anchor coat is laminated on the first anchor coat layer. In order to suppress this, an adhesive layer and an anti-slip layer may be laminated on the lowermost layer.

Moreover, if it is a range which does not inhibit the objective of this invention, in the resin used by the anti-slip layer 2, the film layer 3, the 1st anchor coat layer 4, the 2nd anchor coat layer 6, the adhesive layer 7, and the nonwoven fabric layer 8 Antioxidants, light stabilizers, UV absorbers, anti-mold agents, lubricants, pigments, fillers, and other additives can be added. What is necessary is just to select suitably according to the objective and use.

The total weight of the heat insulating waterproof sheet 1 is preferably 100 to 500 g / m ² . If it is less than 100 g / m ^2, no tension or stiffness, the influence of wind during the construction, there is a possibility that the easy workability turned up the heat shielding waterproof sheet 1 may be impaired, and exceeds 500 g / m ² transportation And lightness may be impaired.

The total thickness of the heat insulating waterproof sheet 1 is preferably 300 to 1000 μm. If the total thickness is less than 300 μm, the strength may not be maintained, and if it exceeds 1000 μm, the thermal insulation waterproof sheet 1 itself becomes hard, the resilience becomes strong, and it becomes difficult to wind up in a roll shape, and it becomes difficult to bend, There is a risk that the construction of the roof ridges, valleys, and rising parts according to the shape may be difficult to perform.

The tensile strength of the heat-insulating waterproof sheet 1 is preferably 60 N / cm or more in the longitudinal direction, 40 N / cm or more in the width direction, and the tear strength is 20 N or more in the longitudinal direction and 18 N or more in the width direction. Below these strengths, there is a risk of tearing during construction, tearing when walking on the heat-insulating waterproof sheet 1, or tearing from nailing portions such as staples used when fixing to the base plate.

Hereinafter, the thermal insulation waterproof sheet and the manufacturing method thereof according to the present invention will be described with examples. The thermal insulation waterproof sheet of Example 1 thru | or Example 4 which concerns on this invention was manufactured, and the physical property was measured. For comparison, thermal insulation waterproof sheets of Comparative Examples 1 to 3 were manufactured and their physical properties were measured. Each physical property in Examples and Comparative Examples was measured by the following methods.

(1) Tensile strength Measured according to JIS A6005.7.8.
(Established date: March 30, 1959 Latest revision date: March 20, 2005)

(2) Tear elongation was measured according to JIS A6013.7.6.
(Established date: March 18, 2005 Revised version: December 22, 2006)

(3) Water resistance Measured according to JIS L1092.7.1 B method (high water pressure method). 200 kPa or more was judged to have water resistance.
(Established date: March 1, 1977 Latest revision date: February 20, 2009)

(4) Static friction coefficient test Static friction between a sheet surface and kraft paper (JIS P3401 kraft paper) using a static friction coefficient tester (TriboGear (registered trademark) static friction coefficient measuring machine TYPE: 10 manufactured by Shinto Kagaku Co., Ltd.) The coefficient was measured. A coefficient of static friction of 0.8 or more was judged to be slippery.

(5) Infrared reflectance Since the heat shielding property prevents radiant heat composed of infrared rays, the heat shielding property is evaluated by the infrared reflectance. More than 70% was judged to have a heat shielding effect.
The infrared reflectance at a wavelength of 2 μm was measured using an infrared spectrophotometer (UVPC-3100, manufactured by Shimadzu Corporation).

(6) Durability evaluation of the metal film layer After each of the following treatments (6) -1 to (6) -5, the reflectance is measured by the method described in (5) above to confirm the corrosion of the metal film layer. The following (6) -1 was judged to be 80% or more, and (6) -2 to (6) -5 was judged to be 70% or more.

(6) -1 Durability 1 Exposure promotion evaluation Treated according to JIS A6111.7.7, and the infrared reflectance of the metal film layer was confirmed. The type of light source was a sunshine carbon arc lamp, and the heat treatment was performed at 90 ° C. for 7 weeks.
(Established date: February 1, 1996 Latest revision date: March 20, 2004)

(6) -2 Durability 2 Acid resistance evaluation Treated according to JIS K7114.4, and the infrared reflectance of the metal film layer was confirmed.
Test temperature 23 ° C, immersion time 1 week, reagent nitric acid (concentration 10 mass%) and sulfuric acid (concentration 5 mass%)
(Established date: April 1, 1972 Latest revision date: February 20, 2001)

(6) -3 Durability 3 Alkali Resistance Evaluation Treated according to the alkali treatment of JIS A6013.7.5.2, and the infrared reflectance of the metal film layer was confirmed.
(Established date: January 1, 1992 Latest revision date: March 20, 2005)

(6) -4 Durability 4 Oil resistance evaluation Treated according to JIS K7114.4, and the infrared reflectance of the metal film layer was confirmed.
Test temperature 23 ° C, immersion time 1 week, reagent mineral oil (ISO1817No1)
(Established date: April 1, 1972 Latest revision date: February 20, 2001)

(6) -5 Durability 5 Warm water resistance evaluation Asphalt roofing industry association standard “modified asphalt roofing material” was treated according to the dimensional stability, and the infrared reflectance of the metal film layer was confirmed.
(Established date: March 18, 2005 Revised version: December 22, 2006)

[Example 1]
Under the polyester film constituting the film layer 3 (manufactured by Unitika Ltd., EMBLET (registered trademark) industrial use PET, thickness 12 μm), an anchor agent for urethane-based aluminum deposition (Arakawa Chemical Industries, Ltd., ARACOAT (registered trademark)) DA100) A resin prepared by adding 10 parts by weight of an isocyanate-based cross-linking agent (ARACOAT (registered trademark) CL100, manufactured by Arakawa Chemical Industries, Ltd.) to 100 parts by weight is adjusted to a thickness of 1.0 μm using a gravure coater. Anchor coat layer 4 was formed. Next, a metal film layer 5 was provided under the first anchor coat layer 4 by forming a film of 99.999% purity aluminum with a thickness of 500 mm by vacuum deposition. Below that, an epoxy-based curing agent was added to 50 parts by weight of an anchor agent for adhesive extrusion lamination of urethane-based aluminum layer (EL-530A, manufactured by Toyo Morton Co., Ltd.) containing a silane coupling agent having an isocyanate organic functional group. The second anchor coat layer 6 is formed using a gravure coater with a resin added with 50 parts by weight of an anchor agent for polyester-based aluminum layer adhesion extrusion lamination (manufactured by Toyo Morton Co., Ltd., EL-530B) to a thickness of 1.0 μm. did.

Furthermore, the polyester which comprises the nonwoven fabric layer 8 is formed under the 2nd anchor coat layer 6 by forming the polyethylene resin (PETROTHENE (registered trademark) 212 made by Tosoh Corporation, PETROTHENE (registered trademark) 212) with a thickness of 40 μm by extrusion lamination method. It was heat-sealed with a spunbonded nonwoven fabric (manufactured by Toray Industries, Inc., AXTAR (registered trademark) G2130-1S, basis weight 130 g / m ² ).

Next, an isocyanate-based cross-linking agent (manufactured by Dainichi Seika Kogyo Co., Ltd., RESAMIN (registered trademark)) is added to 100 parts by weight of an acrylic resin (manufactured by Negami Kogyo Co., Ltd., PARACRON (registered trademark) W-248E) on the film layer 3. (Trademark) UD cross-linking agent) 5 parts by weight, fluorine-based water repellent (manufactured by Meisei Chemical Co., Ltd., ASAHIGUARD (registered trademark) AG-5850), heat-swelling foaming agent (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) A resin to which 30 parts by weight of Microsphere (registered trademark) F-20, microcapsules, average particle diameter of 18 μm, expansion ratio of 10 times, hydrocarbon n-butane) was added was attached to a solid content of 10 g / m ² by a gravure coater. The anti-slip layer 2 was formed by coating to obtain a thermal barrier waterproof sheet 1 having a thickness of 466 μm and a weight of 219 g / m ² . The evaluation results are shown in Table 1.

[Example 2]
The film layer 3 is a polypropylene film (PYLEN FILM (registered trademark) OTP226, manufactured by Toyobo Co., Ltd., thickness 50 μm), and the nonwoven fabric layer 8 is a polypropylene spunbonded nonwoven fabric (produced by Idemitsu Unitech Co., Ltd., STRATEC (registered trademark) RW2200, basis weight 250 g / m). Except for changing to ² ), it was processed in the same manner as in Example 1 to obtain a thermal insulation waterproof sheet 1 having a thickness of 973 μm and a weight of 375 g / m ² . The evaluation results are shown in Table 1.

Example 3
Except for the point that the first anchor coat layer 4 of Example 1 is a 0.4 μm thick first anchor coat layer and the second anchor coat layer 6 of Example 1 is a 0.4 μm thick second anchor coat layer, In the same manner as in Example 1, a thermal insulation waterproof sheet having a thickness of 464 μm and a weight of 216 g / m ² was obtained. The evaluation results are shown in Table 1.

Example 4
Except that the first anchor coat layer 4 of Example 1 is a 4.0 μm thick first anchor coat layer and the second anchor coat layer 6 of Example 1 is a 4.0 μm thick second anchor coat layer, In the same manner as in Example 1, a thermal insulation waterproof sheet having a thickness of 472 μm and a weight of 222 g / m ² was obtained. The evaluation results are shown in Table 1.

[Comparative Example 1]
In the same manner as in Example 1, except that the first anchor coat layer 4 of Example 1 was not formed and the back surface of the film layer 3 of Example 1 was subjected to corona discharge treatment (wetting 38 dyne adjustment). A heat insulating waterproof sheet having a thickness of 465 μm and a weight of 218 g / m ² was obtained. The evaluation results are shown in Table 1.

[Comparative Example 2]
A thermal insulation waterproof sheet having a thickness of 465 μm and a weight of 218 g / m ² was obtained in the same manner as in Example 1 except that the second anchor coat layer 6 of Example 1 was not provided. The evaluation results are shown in Table 1.

[Comparative Example 3]
A heat insulating waterproof sheet described in Example 1 of JP 2010-184451 A. That is, a porous film (porous) in which a vapor-deposited aluminum film is deposited on a 30 μm-thick porous polyethylene film having a water vapor permeability of 7000 g / m ² · 24 hr and a 30 μm-thick porous polyethylene film. Each layer is bonded and integrated by a dry laminating method so that a 12 μm thick weathering agent-containing polyethylene film (synthetic resin protective layer) is laminated in this order, and a thickness of 970 μm and a weight of 302 g. A heat insulating waterproof sheet of / m ² was obtained. The evaluation results are shown in Table 1.

[Comparative Example 4]
Table 1 shows the evaluation results of asphalt roofing 940 (P-color, manufactured by Tajima Kako Co., Ltd.) having a thickness of 1121 μm and a weight of 1099 g / m ² specified in JIS A6005. In addition, since it does not have a metal film layer, "durability evaluation of a metal film layer" was not measured.

As shown in Table 1, the thermal insulation waterproof sheet 1 according to Examples 1 to 4 is higher in tensile strength, tearing strength, and static friction than asphalt roofing 940, which is a general waterproof sheet for roof underarms in Comparative Example 4. Both the coefficient and the infrared reflectance are high, which is excellent in terms of strength, anti-slip property, and heat-shielding property, and the metal film does not corrode even under various situations where metal deterioration is assumed.

On the other hand, the heat-shielding waterproof sheet of Comparative Example 1 in which the first anchor coat layer 4 is not formed has good adhesion between the film layer 3 and the metal film layer 5, but has no effect as a protective layer. In particular, the durability and acid resistance and alkali resistance are inferior.

In Comparative Example 2 in which the second anchor coat layer 6 is not formed, the adhesion between the metal film layer 5 and the adhesive layer 7 is weak and there is no effect as a protective layer. Inferior in alkaline and hot water resistance.

Further, Comparative Example 3 has no anchor coat layer for improving adhesion between the metal vapor deposition film and the protective layer, and is a porous film, so that chemicals can easily permeate from the pores of the film, acid resistance, alkali resistance, Corrosion was confirmed against oil resistance.

Further, Comparative Example 4 does not have a metal film layer, so the infrared reflectance is low, and further, the tensile strength, tear strength, and static friction coefficient are all inferior, and the weight is low because asphalt is used. It was confirmed that it was heavy.

The present invention is capable of various embodiments and modifications without departing from the broad spirit and scope of the present invention. The above-described embodiments and examples are for explaining the present invention and do not limit the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Thermal insulation waterproof sheet 2 Anti-slip layer 3 Film layer 4 1st anchor coat layer 5 Metal film layer 6 2nd anchor coat layer 7 Adhesive layer 8 Nonwoven fabric layer

Claims

It is a multilayer structure of at least 7 layers laminated in the order of an anti-slip layer, a film layer, a first anchor coat layer, a metal film layer, a second anchor coat layer, an adhesive layer, and a nonwoven fabric layer from the upper side in the vertical direction. Thermal insulation waterproof sheet.
The first anchor coat layer is acrylic, styrene, acrylic-styrene copolymer, vinyl chloride, vinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polycarbonate, nitrocellulose, urethane. The heat-insulating waterproof sheet according to claim 1, comprising a mixed material of one, two or more types of melamine, melamine, and epoxy, and having a thickness of 0.4 to 4.0 µm.
The thermal barrier waterproof sheet according to any one of claims 1 to 2, wherein the metal film layer is made of aluminum and has a thickness of more than 300 mm and less than 30000 mm.
In the second anchor coat layer, an epoxy-based, isocyanate-based, or melamine-based curing agent is added to one or more mixed materials of polyester-based, acrylic-based, urethane-based, isocyanate-based, imine-based, and polybutadiene-based materials. The material according to any one of claims 1 to 3, comprising a silane coupling agent having at least one kind of organic functional group, alkoxy group, amino group, epoxy group and isocyanate group, and having a thickness of 0.4 to 4.0 µm. The thermal barrier waterproof sheet according to claim 1.
The thermal insulation waterproof sheet according to any one of claims 1 to 4, wherein the infrared reflectance at a wavelength of 2 µm is 80% or more in the exposure promotion evaluation.