JP2005188091A - Waterproofing deaeration sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproofing deaeration sheet capable of facilitating the execution to the housetop of a building or the substrate of a roof, showing excellent waterproof performance and deaeration performance and maintaining smoothness excellent in the surface of the sheet after the execution of the waterproofing sheet. <P>SOLUTION: The waterproofing deaeration sheet 1 includes a waterproofing membrane 11 and an adhesive layer 12 laminated on the lower surface of the waterproofing membrane 11. A permeable material 13 is buried in the adhesive layer 12 in a state to set in the shape of a lattice (Fig. 2, not shown). The waterproofing deaeration sheet 1 is so constituted that the permeable material 13 is buried in the adhesive layer 12 and that a substrate ground contact surface of the adhesive layer 12 is smoothly formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a waterproof deaeration sheet, and more particularly to a waterproof deaeration sheet used on a rooftop or roof of a building.

  A waterproof sheet is installed on the roof or roof of a building, particularly on the roof or roof of a building having a foundation such as RC (steel reinforced concrete), PCa (precast), ALC (lightweight concrete). However, the waterproof sheet that is generally constructed has problems such as swelling and damage of the waterproof sheet due to the accumulation of steam between the base and the waterproof sheet.

  In order to solve this problem, the surface of the waterproof sheet that contacts the base (hereinafter referred to as the “base grounding surface”) is engraved to form a groove (concave structure), and has excellent adhesiveness to the base such as butyl. A material in which convex portions are formed by alternately arranging substances having a surface on a waterproof sheet base ground surface (protrusion configuration) has been proposed.

However, in the case of a waterproof sheet with a recessed portion, if the amount of adhesive used to fix the waterproof sheet to the base is large, the recessed portion (groove) is blocked by the adhesive and the vapor does not sufficiently vent. Conversely, if the amount of adhesive applied is small, there is a problem that the waterproof sheet cannot be sufficiently fixed and the waterproof sheet swells and the surface of the waterproof sheet becomes uneven. In the case of a waterproof sheet having a convex portion, the load resistance and heat resistance of the adhesive substance constituting the convex portion is weak and easily softened, so that the convex portion is deformed and formed between adjacent convex portions. There is a problem that the surface of the waterproof sheet becomes uneven.
JP-A-11-93342

  The object of the present invention is to provide waterproof desorption that can be easily applied to the roof of a building or the foundation of a roof, exhibits excellent waterproof performance and degassing performance, and maintains excellent smoothness of the sheet surface after the waterproof sheet is installed. Qi is to provide a sheet.

  The present inventors have found that by embedding a breathable material in the adhesive layer constituting the ground contact surface, both the smoothness and breathability of the sheet surface can be improved, and the present invention has been made. Is.

  According to the present invention, it includes a waterproof layer and an adhesive layer laminated on the lower surface of the waterproof layer, and the adhesive layer has a smooth grounded ground surface in which a breathable material is embedded. A waterproof degassing sheet is provided. Here, the ground contact surface refers to the surface of a waterproof deaeration sheet provided on the ground such as RC (reinforced concrete), PCa (precast), and ALC (lightweight concrete) that constitute the rooftop or roof of a building.

  The breathable material used for the waterproof degassing sheet of the present invention is preferably selected from a fiber material and a foam material, and more preferably hydrophobic. Specific examples include glass roving cloth, glass yarn cloth, non-woven fabric, and continuous foam.

  Glass roving is made by bundling short glass fibers without being entangled, and can be made thick and widely. Therefore, glass roving is particularly suitable for embedding in a sheet having a limited thickness and maintaining air permeability. As the glass roving cloth, a roving width of 1 mm to 100 mm is preferable, and a roving width of 3 mm to 10 mm is particularly preferable. Glass yarn cloth is made by short glass fibers. As the glass yarn cloth, those having a yarn diameter of 0.1 mm to 5 mm are preferable, and those having a diameter of 1 mm to 3 mm are particularly preferable. As the cloth weaving, any weave cloth such as plain weaving, satin weaving, leno weaving, twill weaving, and satin weaving can be used, but plain weaving is particularly preferable.

  The nonwoven fabric preferably has a thickness of 0.1 mm to 8 mm made of polyester, rayon, polyolefin, polyester / vinylon, polyester / acrylic, polyester / rayon, polyester / polyolefin, polyester / nylon / rayon, and preferably 1 mm to 3 mm. Are particularly preferred.

  The continuous foam is made of polyolefin resin, urethane rubber, acrylic rubber, butadiene rubber, styrene-butadiene rubber, acrylonitrile butadiene rubber, polyisoprene rubber, chloroprene rubber, isobutylene-isoprene rubber, ethylene-propylene rubber. A foam having a thickness of 0.1 mm to 8 mm is preferred, and a foam having a thickness of 1 mm to 3 mm is particularly preferred.

  The waterproof layer of the waterproof degassing sheet of the present invention may be a sheet-form compound composed of a material constituting a normal waterproof sheet. For example, a compound containing a rubber, a thermoplastic resin, an inorganic filler, and a softener is formed into a sheet form. It may be formed into a shape.

  In the composition constituting the waterproof layer of the present invention, examples of the rubber include butyl rubber, ethylene propylene rubber (EPDM), natural rubber, acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), styrene butadiene rubber (SBR), Examples thereof include butadiene rubber (BR), isoprene rubber (IR), and acrylic rubber. Examples of the thermoplastic resin include polyethylene (PE), ethylene vinyl acrylate (EVA), atactic polypropylene (APP), and polypropylene (PP). Examples of the inorganic filler include calcium carbonate, barium sulfate, magnesium hydroxide, clay, silicic acid, and carbon black. Examples of the softener include mineral oil rubber softeners such as process oil and extender oil.

  The composition of the sheet-like compound constituting the waterproof layer of the present invention is preferably a ratio of rubber: thermoplastic resin: inorganic filler: softener = 20-30: 2: 75-65: 3, rubber: The ratio of thermoplastic resin: inorganic filler: softener = 25: 2: 70: 3 is more preferred.

  The pressure-sensitive adhesive layer of the waterproof degassing sheet of the present invention preferably contains a self-adhesive rubber compound as a main component, and contains a compound containing rubber, thermoplastic resin, inorganic filler, softener, tackifier, and reinforcing fiber. More preferably, it is formed into a sheet shape.

  In the compound constituting the pressure-sensitive adhesive layer of the present invention, those used as the compound constituting the waterproof layer can be preferably used as the rubber, thermoplastic resin, inorganic filler and softener. Examples of the tackifier include rosin resin, terpene resin, coumarone indene resin, aliphatic and aromatic petroleum resin, polybutene, and the like. Examples of the reinforcing fiber include waste paper, ester fiber, glass fiber, and aramid fiber.

  The ratio of each component of the adhesive rubber compound constituting the adhesive layer of the present invention is as follows: rubber: thermoplastic resin: inorganic filler: softener: tackifier: reinforcing fiber = 10: 3-9: 75-65: 3: A ratio of 8 to 12: 1 is preferable, and a ratio of rubber: thermoplastic resin: inorganic filler: softener: tackifier: reinforcing fiber = 10: 6: 70: 3: 10: 1 is more preferable. Self-adhesive rubber compound: Breathable material = 80-60: 20-40, preferably self-adhesive rubber compound: Breathable material = 70-60: 30-40, more preferably self-adhesive. It is preferable that a breathable material is included at a ratio of area of rubber compound: breathable material = 65: 35.

The waterproof deaeration sheet of the present invention is characterized in that a breathable material is embedded in an adhesive layer, and a ground contact surface is smooth.
The waterproof deaeration sheet of the present invention is obtained by laminating a sheet-like composition constituting an adhesive layer on a sheet-like composition constituting a waterproof layer, and placing a breathable material on the surface of the sheet-like composition constituting the adhesive layer at a predetermined position. Can be manufactured by placing them on and crimping together. In the present invention, the breathable material is embedded in the adhesive layer in a predetermined arrangement, and forms a two-layer structure of a waterproof layer and an adhesive layer. The breathable material is preferably arranged so that an air passage can be formed between the waterproof degassing sheet and the base, for example, vertically or horizontally across the waterproof degassing sheet. A thing in which a plurality of ventilation paths are arranged in parallel, a thing arranged in the shape of a lattice in the vertical direction and the horizontal direction, and the like are preferable. In particular, a lattice-like arrangement capable of increasing the air passage area is preferable.

  One embodiment of the waterproof deaeration sheet of the present invention is shown in FIGS. In FIG. 1, the waterproof degassing sheet 1 includes a waterproof layer 11 and an adhesive layer 12 laminated on the lower surface of the waterproof layer 11. As shown in FIG. 2, the air-permeable material 13 is embedded in the adhesive layer 12 in a state of being arranged in a lattice shape. In the waterproof deaeration sheet 1 of the present invention, the air-permeable material 13 is completely embedded in the adhesive layer 12, and the ground contact surface of the adhesive layer 12 is formed smoothly.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these.

  EPDM (Keltan 312; manufactured by Idemitsu Petrochemical) 14% by weight, natural rubber (RSS-3: manufactured by Toyota Tsusho) 11% by weight, polyethylene (Excellen VL-100: manufactured by Sumitomo Chemical) 2% by weight, calcium carbonate as an inorganic filler (TM-1: made by Yue Heng Mining) 70% by weight, carbon black (HTC # 100: made by Nisshin Carbon), 3% by weight process oil (SNH-220: made by Sankyo Oil Industries) as a softening agent After kneading with a Banbury mixer, the obtained blend was molded into a sheet having a thickness of 1.5 mm with a calender roll to prepare a sheet-like blend to be a waterproof layer.

  Butyl rubber (BUTYL365: made by JSR) 10% by weight, BR (BR-01: made by JSR) 5% by weight, terpene resin (trade name: YS-800, made by Yasuhara Chemical) 5% by weight, polybutene (trade name) : HV-300, manufactured by Nippon Petrochemical Co., Ltd.) 5% by weight, calcium carbonate as an inorganic filler (trade name: TM-1, manufactured by Yusheng Mining Co., Ltd.) 70% by weight, carbon black (HTC # 100: manufactured by Nisshin Carbon) 1% by weight, 3% by weight of process oil (SNH-220: Sankyo Yuka Kogyo Co., Ltd.) as a softener, and 1% by weight of glass fiber (CS3SK-406S: Nittobo) as a reinforcing fiber are kneaded in a pressure kneader. The resulting blend was molded into a sheet having a thickness of 0.5 mm by an extruder to prepare a sheet-like self-adhesive rubber compound that became an adhesive layer.

  The obtained waterproof layer sheet-form compound and the adhesive layer sheet-form self-adhesive rubber compound are laminated and bonded, and the surface of the sheet-form self-adhesive rubber compound is plain-woven with glass rovings. A roving was thinned from a glass roving cloth (R810H100K: made by Unitika glass fiber) at intervals and arranged in a lattice pattern as shown in FIG. 1, and then bonded together to create the waterproof deaeration sheet of the present invention. .

Comparative Example 1

  A groove 22 having a width of 2.0 mm and a depth of 0.5 mm is imprinted at 10 mm intervals on one side 21 of the sheet-form composition for waterproofing layer (thickness 1.5 mm) prepared in Example 1 and shown in FIG. A waterproof deaeration sheet was created.

Comparative Example 2

  The sheet-like self-adhesive rubber compound prepared in Example 1 (thickness 1.0 mm × width 50 mm × length) was formed on one side 31 of the waterproof layer-prepared sheet-like compound (thickness 1.5 mm) prepared in Example 1. 100 mm) was laminated and bonded at equal intervals as shown in FIG. 3 to form convex portions 32, and a waterproof deaeration sheet was prepared.

  The following performances of the waterproof deaeration sheets prepared in Example 1 and Comparative Examples 1 and 2 were measured according to the test procedure specified in JASS8 waterproofing construction.

[Watertight test]
The watertight performance of the waterproof degassing sheets prepared in Example 1 and Comparative Examples 1 and 2 was measured according to the watertight test procedure specified in JASS8 waterproofing construction.

  JASS8 waterproofing construction2. A test box specified in the watertight test is made, and the waterproof deaeration sheet prepared in Example 1 and Comparative Examples 1 and 2 is applied to the inside and the rising surface to prepare a test body (one body) After curing for a period, water was poured into the box so that the water depth was 10 cm and left for 1 week to observe the presence or absence of water leakage.

[Dent test]
The resistance performance against the dent of the waterproof deaeration sheet prepared in Example 1 and Comparative Examples 1 and 2 was measured according to the dent test procedure defined in JASS8 waterproofing work 3.1.

  A test specimen was prepared by placing the waterproof degassing sheet (100 × 100 mm) prepared in Example 1 and Comparative Examples 1 and 2 on the base plate. After the test bodies (3 bodies) were allowed to stand for 1 hour or longer under each test temperature condition (20 ± 2 ° C., 60 ± 2 ° C.), a steel ball with a diameter of 30 mm was placed in the center of the waterproof layer, A constant load of a total amount of 50 N was loaded for 24 hours. Thereafter, the waterproof layer was inspected for perforations. If there was no hole in all three bodies, the loading position was changed and loading was carried out sequentially at 150N for 24 hours and at 250N for 24 hours, and the holes in the waterproof layer were sequentially inspected.

[Shock resistance test]
The impact resistance performance of the waterproof deaeration sheets prepared in Example 1 and Comparative Examples 1 and 2 was measured according to the impact resistance test procedure defined in JASS8 waterproofing work 3.2.

  A test specimen was prepared by placing the waterproof degassing sheet (300 × 300 mm) prepared in Example 1 and Comparative Examples 1 and 2 on the base plate. After the test specimens (3 bodies) were allowed to stand for 1 hour or longer under the respective test temperature conditions (0 ± 2 ° C., 20 ± 2 ° C., 60 ± 2 ° C.), a weight having a hemispherical tip (tip diameter 10 mm, mass) 500 ± 2 g, made of iron) was dropped on the waterproof layer of the test specimen from a position of 0.5 m in height from the tip to the surface of the waterproof layer. Thereafter, the waterproof layer was inspected for perforations. If all three bodies did not have holes, the weights were changed, the weights were dropped sequentially from a height of 1 m and 1.5 m, and the holes in the waterproof layer were sequentially inspected.

[Fatigue test]
The follow-up performance of the waterproof degassing sheets prepared in Example 1 and Comparative Examples 1 and 2 with respect to the ground was measured according to the fatigue test procedure specified in JASS8 waterproofing work 3.3.

  The shape of the test body is B2 type (with an opening of 2 mm in the width direction of the center part of the base plate), and the waterproof degassing sheets prepared in Example 1 and Comparative Examples 1 and 2 are placed on the base plate. The test specimens (three bodies) were used. The waterproof deaeration sheet obtained in Example 1 and Comparative Example 2 was fixed to the base plate by self-adhesive force, and the waterproof deaeration sheet obtained in Comparative Example 1 was fixed to the base plate using an adhesive. The test temperature was set to -10 ° C, the interval between the openings was changed to 3 mm, held for 1 minute, and then the operation to change the interval between the openings from 3 mm to 1 mm was set as one cycle, and this was repeated 50 cycles. The adhesion state was observed.

[Joint displacement test]
The durability performance of the joint part of the waterproof deaeration sheet prepared in Example 1 and Comparative Examples 1 and 2 was measured according to the joint displacement test procedure defined in JASS8 waterproofing work 3.4.

  As specified in JASS8 waterproofing construction 3.4, a test body was prepared by applying the waterproof degassing sheet prepared in Example 1 and Comparative Examples 1 and 2 to the base body according to the specifications. The specimens (3 bodies) that have undergone predetermined curing are left in a temperature-controlled room at 20 ° C. ± 2 ° C. for 24 hours, and then a standard line is drawn at a position 10 mm away from the joint end, and the length is 1/4 mm. To the distance between marked lines. Subsequently, the test body was allowed to stand for 48 hours in an air circulating thermostat at a temperature of 80 ° C. × 2 ° C. Next, the test body was allowed to stand for 48 hours in a low-temperature thermostatic chamber at a temperature of 0 ± 2 ° C., and further allowed to stand for 72 hours in a thermostatic chamber at 20 ° C. ± 2 ° C. The operation from this 80 ° C. air circulation type thermostatic chamber to standing in the 20 ° C. thermostatic chamber was repeated for 5 cycles. After the end of 5 cycles, the distance between the marked lines was measured in a thermostatic chamber at 20 ° C. to determine the displacement of the joint, and the presence or absence of damage to the waterproof layer was observed.

[Corner stability test]
The stability performance at the corner of the waterproof degassing sheet prepared in Example 1 and Comparative Examples 1 and 2 was measured according to the corner stability test procedure defined in JASS8 waterproofing construction 3.6.

  As specified in JASS8 waterproofing construction 3.6, the test body was prepared by applying the waterproof degassing sheet prepared in Example 1 and Comparative Examples 1 and 2 to the base body according to the specifications. The test bodies (3 bodies) that had undergone the predetermined curing were allowed to stand for 48 hours in an air circulation thermostat at a temperature of 80 ± 2 ° C. Next, the test specimen was allowed to stand for 48 hours in a low-temperature thermostatic chamber at a temperature of 0 ± 2 ° C., and further allowed to stand for 72 hours in a thermostatic chamber at 20 ± 2 ° C. The operation from the 80 ° C. air circulation thermostat to the 20 ° C. thermostatic chamber was set as one cycle and repeated 5 cycles. After 5 cycles, the waterproof layer was observed for wrinkles, corner pulling, and breakage in a constant temperature room at 20 ° C.

[Blowout test]
The resistance against the blistering of the waterproof deaeration sheet prepared in Example 1 and Comparative Examples 1 and 2 was measured according to the blister test procedure specified in JASS8 waterproofing work 3.8.

  As specified in JASS8 waterproofing construction 3.8, a test body was prepared by applying a waterproof deaeration sheet (300 × 300 mm) prepared in Example 1 and Comparative Examples 1 and 2 according to the specifications to the base body. The test bodies (3 bodies) were allowed to stand at a test temperature of 60 ± 2 ° C. for 1 hour or longer. In this state, a test body is installed in the blister test apparatus, and first, a pressure of 5.0 kPa is applied, and the outline of the insulating portion is marked with white ink or the like. Next, a pressure of 10.0 kPa was applied for 10 minutes, a pressure of 20.0 kPa was further applied for 10 minutes, and a pressure of 50.0 kPa was applied for 10 minutes in order, and abnormalities such as expansion of the insulating portion were observed.

  The above test results are summarized in Table 1 below.

  From Table 1, the waterproof deaeration sheet according to the present invention has a self-adhesive compound, so that it flexibly follows the deformation of the base, while the glass roving cloth has excellent dimensional stability as a waterproof base material. Also, good results have been obtained in the joint displacement test. In addition, since it has a self-adhesive layer on the entire surface of the sheet, it has excellent flexibility and good results in corner stability. The later waterproof performance is maintained high, and furthermore, the use site can be applied to a wider range.

  The waterproof deaeration sheet according to the present invention is suitable for use on the rooftop of a building and the like because it has excellent adhesion to the base and followability to deformation of the base and exhibits high durability. In addition, the waterproof deaeration sheet of the present invention has a grounded ground surface that is smooth, so that the adhesive is grooved when fixed to the base as in the case of a conventional waterproof deaeration sheet with a concave or convex structure. There are defects such as intrusion to block the air passage, insufficient fixing to the base and swelling, and the waterproof base sheet changing dimensions due to temperature rise, peeling from the base or peeling of the joint part of the sheet In addition, the construction is easy and the finish after construction is beautiful.

Fig.1 (a) is a side view which shows one Embodiment of the waterproof deaeration sheet | seat of this invention, FIG.1 (b) is the top view seen from the grounding ground surface side of the waterproof deaeration sheet | seat of this invention. FIG. 2A is a side view of a conventional waterproof deaeration sheet having a concave structure used in Comparative Example 1, and FIG. 2B is a plan view of the waterproof deaeration sheet as viewed from the ground contact surface side. . 3A is a side view of a waterproof deaeration sheet having a conventional convex structure used in Comparative Example 2, and FIG. 3B is a plan view of the waterproof deaeration sheet viewed from the ground contact surface side. is there.

Explanation of symbols

1: Waterproof deaeration sheet 11: Waterproof layer 12: Adhesive layer 13: Breathable material

Claims (3)

  A waterproof deaeration comprising: a waterproof layer; and an adhesive layer laminated on a lower surface of the waterproof layer, wherein the adhesive layer has a smooth grounded ground surface in which a breathable material is embedded. Sheet.   The waterproof degassing sheet according to claim 1, wherein the breathable material is selected from a fiber material, a foam material, and a hollow material. The waterproof deaeration sheet according to claim 2, wherein the breathable material is further hydrophobic.

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