JP3383513B2 - Inorganic long fiber reinforced waterproof layer structure and method of forming the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an inorganic long fiber reinforced waterproof layer structure and a method for forming the same.

[0002]

BACKGROUND OF THE INVENTION Conventionally, when a waterproof layer is formed on a surface to be treated such as a rooftop, a veranda, a floor, an outer corridor, a parking lot, a water tank, a pond, etc., a hot asphalt coating method has predominantly been used as a construction method. Other examples include a method in which a synthetic resin paint such as urethane, acrylic, or polyester is applied to the surface to be treated, or sheets such as synthetic rubber or vinyl chloride are attached to the surface to be treated.

In these conventional construction methods, especially when the surface to be treated (base) is concrete, even if a crack occurs on the concrete surface, the waterproof layer is not destroyed.
A base fabric consisting of several (non) woven fabrics made of polyester fiber or glass fiber can be spread on site during construction, and the base fabric is impregnated with a reactive resin such as unsaturated polyester resin or epoxy resin and then cured. Thus, the waterproof layer is formed (FRP method).

However, in this FRP method, it is extremely difficult to uniformly apply the (non) woven cloth over a wide area, and there is a problem that wrinkles are easily generated when the (non) woven cloth is applied. Moreover, such a conventional waterproof construction method has a problem in that it has a large number of steps, is complicated in terms of work, tends to have a particularly long construction period, and troubles due to rainfall during the construction are likely to occur.

In particular, when a glass fiber (non) woven cloth is used as the base cloth, the short glass fibers are scattered during the construction when the operator directly handles it at the work site, which causes a problem of pollution. is there.

A glass fiber-containing polyester resin sheet is also proposed in which a (non) woven fabric made of glass fiber is used as a base fabric, a polyester resin which is a thermosetting resin is used as a matrix, and these are integrally formed into a sheet in advance. However, since the resin used is a thermosetting resin and is hard, it is not possible to easily conform to the uneven shape of the substrate at the work site, and such a sheet is usually a flat substrate. Being used against. In addition, when using a polyester resin sheet containing such glass fibers for waterproofing work on corners, uneven bases, etc., create a sheet-like part with an uneven shape in advance according to the shape of the uneven base, etc. The current situation is that they are simply brought into contact with and arranged in a predetermined position on the spot. However, with such a method, there is a problem in that the worker cannot easily carry out the fiber-reinforced waterproofing work on site in accordance with the base shape.

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve the problems associated with the prior art as described above, and has a higher tensile strength and creep characteristics than various conventionally used waterproof layers. It is an object of the present invention to provide an inorganic long fiber reinforced waterproof layer structure and a method for forming the same, which is excellent and can be easily installed, is extremely effective in improving work efficiency, reducing the load on the floor, and preventing pollution. .

[0008]

SUMMARY OF THE INVENTION An inorganic long fiber reinforced waterproof layer structure according to the present invention comprises a waterproof adhesive layer coated on a base surface and a long fiber reinforced layer adhered to the base surface via the waterproof adhesive layer. And a waterproof structure having a waterproof adhesive layer coated on the surface of the long fiber reinforced layer, wherein the long fiber reinforced layer is laminated with a polyester nonwoven fabric on both surfaces of the inorganic long fiber-containing thermoplastic resin layer, or Further, a heat insulating material is further adhered to the lower surface, and the inorganic long fiber-containing thermoplastic resin layer contains a large number of inorganic long fibers arranged in one direction along a direction substantially parallel to the layer. Two or more inorganic long fiber-containing thermoplastic resin sheet layers (long fiber-containing sheet layers) are laminated. In these long fiber-containing sheet layers, the inorganic long fibers in the laminated sheet layers are substantially orthogonal to each other. It is special to be laminated It is set to.

In the present invention, a hard aggregate may be further fixed to the surface waterproof adhesive layer, which is effective for slip prevention and the like. In the method for forming an inorganic long fiber-reinforced waterproof layer structure according to the present invention, a thermoplastic resin sheet containing a large number of inorganic long fibers oriented in one direction along a direction substantially parallel to the layer, in a sheet to be laminated Two or more sheets are laminated so that the orientation directions of the inorganic fibers are substantially orthogonal to each other and heat fusion is performed, and a polyester nonwoven fabric is laminated on both surfaces of the obtained fusion sheet, or heat insulation materials are further adhered to the lower surface to obtain The sheet for inorganic long fiber reinforced thermoplastic resin layer (long fiber reinforced layer) thus obtained is adhered to the base surface via a waterproof adhesive layer coated on the base surface, and then the obtained long fiber reinforced layer is obtained. It is characterized in that a waterproof adhesive material is applied on top.

In the present invention, the long fiber reinforced layer sheet may be deformed along a complicated base shape by heating and softening the long fiber reinforced layer sheet. Is usually attached to the surface of the base through a waterproof adhesive layer.

In the inorganic long fiber reinforced waterproof layer structure according to the present invention, the tensile strength is large, the creep characteristics are excellent, the construction is easy, and the working efficiency is improved, as compared with the various waterproof layers conventionally used. It is also extremely effective in reducing the load on the floor. In particular, the inorganic long fiber-containing thermoplastic resin sheet (long fiber-containing sheet), etc., which constitutes the above-mentioned long fiber-reinforced layer, can be mass-produced in factories, etc. Multiple layers (sheets) under preventive control
The long fiber reinforced layer sheets are made by fusing each other and further pasting polyester nonwoven fabric on the upper and lower surfaces, and at the waterproofing construction site, the long fiber reinforced layer sheets are cut to a desired dimension, and if necessary, surface irregularities If you heat and soften it according to the shape and stick it, glass fibers etc. will not scatter,
It is extremely effective in terms of ensuring work safety and preventing pollution.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The inorganic long fiber reinforced waterproof layer structure and the method for forming the same according to the present invention will be specifically described below with reference to the drawings.

1 to 5 show an embodiment of an inorganic long fiber reinforced waterproof layer structure according to the present invention. In the drawings, the same reference numerals indicate the same members. [Inorganic Long Fiber Reinforced Waterproof Layer Structure] The inorganic long fiber reinforced waterproof layer structure according to the present invention is, for example, as shown in FIG.
A waterproof adhesive layer (also referred to as a "lower waterproof adhesive layer") 20 coated on the surface of the base 10, a long fiber reinforced layer 30 attached to the surface of the base via the waterproof adhesive layer, and the length It has a waterproof adhesive layer (also referred to as “upper waterproof adhesive layer”) 40 coated on the surface of the fiber reinforced layer.

The long fiber reinforced layer 30 in the inorganic long fiber reinforced waterproof layer structure 50 is laminated with a polyester nonwoven fabric 34 on both surfaces of the inorganic long fiber-containing thermoplastic resin layer 38 as shown in FIG. 1 (b). It has a structured structure.

Moreover, the inorganic long fiber-containing thermoplastic resin layer 38 contains a large number of inorganic long fibers 36 (a) or 36 (b) arranged in one direction along a direction substantially parallel to the layer. Two or more inorganic long fiber-containing thermoplastic resin sheet layers (long fiber-containing sheet layers) (in FIG. 1, 2 of 38a and 38b).
Layers) laminated, and each long fiber-containing sheet layer 38
a and 38b are long-fiber-containing sheet layers 3 that are laminated one above the other.
The inorganic long fibers 36b and 36a in 8b and 38a are arranged so as to be substantially orthogonal to each other.

The layers constituting such an inorganic long fiber reinforced waterproof layer structure will be sequentially described below. [ Waterproof Adhesive Layer] Each of the waterproof adhesive layers 20 and 40 is made of polymer-reinforced modified asphalt (a) or elastic resin (b). However, the thicknesses and materials of the upper waterproof adhesive layer 40 and the lower waterproof adhesive layer 20 may be the same or different as long as they are formed of the following materials.

The lower waterproof adhesive layer 20 is typically shown in FIGS.
As shown in FIG. 3, it is provided on a primer layer 6 which is formed in advance on an underlayer 10 such as a concrete slab. The primer may be either water-based or solvent-based, and the water-based primer includes asphalt emulsion, acrylic emulsion and the like, and as the solvent-based primer,
A one-pack moisture-curable urethane prepolymer is preferable.

The thickness of such a primer layer is not particularly limited as long as it can adhere the concrete foundation and the waterproof adhesive layer 20 firmly and firmly and firmly.
It is about 0.1 to 0.3 mm. It is preferable to provide such a primer layer between the base and the lower waterproof adhesive layer 20 because it is effective for preventing peeling from the lower waterproof adhesive layer 20 and for preventing swelling.

The waterproof adhesive layers 20 and 40 are made of polymer-reinforced modified asphalt (a) or elastic resin (b). [Polymer-reinforced modified asphalt (a)] Polymer-reinforced modified asphalt is composed of 90-110 parts by weight of an asphalt emulsion composed of an asphalt component (a) having an asphalt content of about 40-60% by weight [eg: about 50% by weight]. , 90 to 100 parts by weight of the asphalt component (a)
˜150 parts by weight, preferably 100 to 120 parts by weight of the polymer component (b) are mixed, and the resulting mixture and 5 to 40 parts by weight, preferably 20 to 100 parts by weight of the asphalt component (a). It is obtained by mixing and curing 40 parts by weight of inorganic powder (eg, Portland cement, etc.).

In the present invention, during the waterproof construction, the asphalt component (a) and the polymer component are usually used as described above.
Paste-like material or liquid material obtained by mixing (b) with inorganic powder (polymer-reinforced modified asphalt paint)
Is applied to the planned portion of the waterproof adhesive layer. In the paste-like material (liquid material) thus applied, the urethane curing reaction proceeds, the water content in the paint is used for the hydration reaction of the cement, and the paste-like material (liquid) is not foamed. As a result, it gradually gels and hardens [Example: 20
Cured at a temperature of ℃ for about 24 hours], desired waterproof adhesive layer 2
0, 40 are formed. In addition, in the conventional waterproofing work,
Usually, only asphalt is applied after applying the primer on the base, but asphalt becomes hard and brittle in the winter and softens in the summer. In addition, it is inconvenient for waterproofing work, and troubles such as cracks and softening bulges (protrusion) are likely to occur in the obtained waterproof layer.

As the asphalt component (a), a modified asphalt emulsion is used, and this modified asphalt emulsion is previously prepared from natural rubber, synthetic rubber (for example, styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, nitrile). Rubber, butyl rubber, etc.), synthetic polymer copolymer resin (eg ethylene vinyl acetate copolymer, ethylene acrylate copolymer etc.), synthetic resin (eg coumarone resin, petroleum resin, xylene resin, synthetic terpene resin, alkyd resin etc.) ), Natural resins (rosin and its derivatives, terpene resins, etc.) are melt-mixed with the following asphalt to give viscoelasticity to the asphalt, and then necessary in the presence of various surfactants as described below. By using an emulsifying machine such as a colloid mill,
It can be obtained by emulsifying and dispersing in water.

The modified asphalt emulsion can also be obtained by mixing the above-mentioned latex-like resins with an ordinary asphalt emulsion to impart viscoelasticity.

Specific examples of asphalt include straight asphalt, blown asphalt,
The softening point of cut back asphalt is usually 70.
The thing of about 110 degreeC [example: 85 degreeC] is mentioned.

Examples of the surfactant include various surfactants such as anionic, cationic, nonionic and amphoteric surfactants. In the asphalt component (a), the total amount of the asphalt is usually 40 to 70 [example: about 50].
% By weight].

As the polymer component (b), a one-component moisture-curable urethane prepolymer solution is used. The one-part moisture-curable urethane prepolymer has an average molecular weight of 100.
To 20,000 and a polyoxyalkylene polyol having an ethylene oxide content of 30% by weight or less is reacted with an excess amount of an organic polyisocyanate (eg, tolylene diisocyanate, diphenylmethane diisocyanate, etc.) to obtain a urethane prepolymer containing a terminal isocyanate group. It is a polymer.

In the present invention, a small amount of a solvent (eg, toluene, xylol, methyl ethyl ketone, etc.) which is non-reactive or difficult to react with the isocyanate group in the urethane prepolymer is added to the urethane prepolymer containing terminal isocyanate group [eg: The viscosity is adjusted by adding 3 to 10% by weight to 100% by weight of the urethane prepolymer,
Used as a urethane prepolymer solution.

When the performance of the polymer-reinforced modified asphalt as described above is compared with urethane rubber type 1 in accordance with JIS A 6021 (roof coating waterproof material), this polymer-reinforced modified asphalt shows the following table. As shown in, it is understood that the strength exceeds that of the urethane rubber type 1 class waterproof material which is a general-purpose waterproof material.

[0028]

[Table 1]

[Elastic Resin (B)] Waterproof Adhesive Layers 20, 40
May be formed from the polymer-modified asphalt (a) as described above, but as described below, a soft / elastic resin
It may be formed of (b).

Examples of the soft / elastic resin (b) include urethane resin (b-1), elastic epoxy resin (b-2), and elastic unsaturated polyester resin (b-3).

The urethane resin (b-1) is a soft / elastic polymer produced by the reaction of an isocyanate group-containing compound and a polyol, and the isocyanate group-containing compound is specifically, for example, Tolylene diisocyanate, diphenylmethane diisocyanate, etc. may be mentioned, and specific examples of the polyols include glycols such as propylene glycol; polyether glycols such as polyethylene glycol.

The elastic epoxy resin (b-2) has an epoxy equivalent of 150 to 200 [eg, about 185], an epoxy resin having an average molecular weight of about 600 to 700, and a polyamide type curing agent as a main component as a curing agent. A soft / elastic body obtained by mixing and reacting with a compound containing an aliphatic polyamine, an aromatic polyamine, a modified heterocyclic diamine, or the like.

This waterproof adhesive layer (coating film waterproof layer) 20, 4
0 is a high strength, and even if the waterproof adhesive layer 40 is exposed to the outside as a surface layer, the purpose of use as a waterproof layer can be sufficiently achieved. Contributes to labor saving and cost reduction during layer construction.

The waterproof adhesive layers 20 and 40 are usually prepared by mixing the above-mentioned respective components and applying them as a waterproof adhesive material (paint) at a predetermined position in a paste or liquid state before curing. , Is formed by curing.

The thickness of such a waterproof adhesive layer is as follows:
0 and the lower part 20 are not particularly limited, but are, for example, 1 to 3.
It is about mm. [Long fiber reinforced layer] The long fiber reinforced layer (inorganic long fiber reinforced thermoplastic resin layer) 30 is an inorganic long fiber-containing thermoplastic resin layer 38.
Polyester nonwoven fabric 34 is fused on both surfaces of the inorganic long fiber-containing thermoplastic resin layer 38, and the inorganic long fiber-containing thermoplastic resin layer 38 is arranged in one direction (30a or 30b) along a direction substantially parallel to the layer. Inorganic filament 36 (a) or 36
Two or more inorganic long fiber-containing thermoplastic resin sheet layers (long fiber containing sheet layers) containing (b) (38 in FIG. 1).
a, 38b), and the long fiber-containing sheet layers 38a, 38b are laminated in the vertical fiber-containing sheet layers 38a, 38b.
(B) are sequentially laminated so as to be substantially orthogonal to each other when viewed from the direction perpendicular to the layers (from above).

The long fiber reinforced layer 30 as described above is preferably formed from a sheet separately prepared in a factory or the like as the long fiber reinforced layer forming sheet. In order to produce the sheet, first, a large number of glass long fibers or carbon long fibers for the core material, which are oriented continuously in one direction so as to be substantially parallel to the layers, are continuously arranged in a matrix. Plastic resin (eg polyethylene, polystyrene, polypropylene,
A plurality of sheet-like materials integrally formed by coating (polycarbonate, nylon, polyimide, etc.) so that the orientation directions of the fibers in the sheet-like materials laminated (adjacent) vertically are orthogonal to each other (for example, shown in FIG. 1). (2 sheets) to be integrated by fusing, so that the inorganic long fiber-containing thermoplastic resin layer 3
8. Forming sheet (laminated sheet).

Then, a polyester nonwoven fabric is laminated on both sides of the laminated sheet, whereby a sheet for forming the long fiber reinforced layer 30 can be prepared. When the polyester nonwoven fabric is laminated on the surface of the laminated sheet as described above, the adhesiveness between the laminated sheet and the coating material applied to the surface of the laminated sheet can be further improved.

The thickness of only the above-mentioned laminated sheet is usually about 0.2 mm to 1.0 mm, though it depends on the number of laminated sheets. In such a laminated sheet, the long fibers and the matrix resin have a good affinity and are integrated without shrinking or stretching, and the long fiber reinforced layer 30 including such a laminated sheet is Waterproof adhesive layer 20, 40
Both are integrated. Moreover, the inorganic long fibers in the long fiber reinforced layer are not attacked by the asphalt in the waterproof adhesive layer 20.

The long fiber reinforced layer composed of such a sheet for long fiber reinforced layer used in the present invention uses polypropylene as a matrix resin and has 210 long glass fibers orthogonal to each other.
It is contained in an amount of g / m ² (70% by weight) and has a thickness of only 0.
Even if the thickness is 2 mm (1/10 of JIS standard), the tensile strength is 75 kgf / cm (150 mm at 0.4 mm thickness).
gf / cm).

JIS A 6008 (Synthetic Polymer Roofing Sheet) is a synthetic composite type waterproof sheet (2 mm thick) of the commonly used reinforced composite type (composite sheet depending on the strength of the reinforcing base cloth). The standard is set and the tensile strength is 61.2 kgf / cm ² or more.

That is, in the inorganic long-fiber-reinforced waterproof layer structure 50 according to the present invention, even the long-fiber-reinforced layer constituting the structure (corresponding to the above-mentioned JIS reinforced base fabric) alone has a JIS standard strength. However, in the present invention, both the upper and lower surfaces of the long fiber reinforced layer (long fiber reinforced sheet 30),
Preferably, the entire surface including the side surface is further covered and reinforced with a waterproof paint, so that a waterproof layer having extremely excellent strength is formed. Moreover, in the present invention, since the long fiber reinforced layer is formed from the long fiber reinforced layer sheet that ensures sufficient high strength even if it is made thin and lightweight as described above,
It is possible to reduce the weight of the inorganic long fiber reinforced waterproof layer structure (waterproof layer 50) as a whole, which is extremely advantageous in the structure of a building or the like.

Further, if the sheet for long fiber reinforced layer (long fiber reinforced sheet) is produced in a factory under environmental hygiene control and quality control, it does not depend on the skill of the operator such as the proficiency of construction at the construction site. Since it is possible to easily form a constant and high-quality inorganic long-fiber reinforced waterproof layer structure with a small number of processes, it is possible for individual workers to use environmentally friendly materials such as glass fiber or polyester fiber (non-woven) fabric to prevent environmental pollution. Compared to the method of sticking small areas one by one while paying attention to the safety of work, it is extremely simple and safe, and the construction reliability is high.

The sheet for forming the inorganic long fiber-containing thermoplastic resin layer 38 of the present invention is a generally used 2.0 mm-thick synthetic polymer waterproof even if it is a very thin 0.2 mm-thick sheet. It has high strength comparable to a sheet.

In order to apply the above-mentioned sheet for a long fiber reinforced layer to concrete for foundation, etc., usually, a primer is first applied, and polymer-modified asphalt, soft urethane or soft polyester is applied onto this primer layer. It is sufficient to apply a waterproof film made of, for example, etc., and to adhere and cure the long fiber reinforced layer sheet on the waterproof film.

As a sheet which can be used for forming such a long fiber reinforced layer, a laminated sheet (trade name: "Preglon") manufactured by Mitsui Toatsu Chemicals, Inc. can be mentioned. In particular, considering the workability at the site and the required performance as a waterproof layer, the glass fiber content is, for example, 50% or less.
The sheet having a volume% of about 0.1 to 0.4 mm is preferably used.

Such a sheet for long fiber reinforced layer (eg:
The non-woven fabric (including felt) that is fused and integrated (laminated) on the surface of the "preglon sheet" is made of polyester, nylon, polypropylene or the like and has a thickness of about 0.2 to 1 mm. In the invention, such a "preglone sheet" with a non-woven fabric is preferably used as the sheet for long fiber reinforced layer.

The long fiber reinforced layer sheet can be produced in advance in a factory. In the present invention, for example, 0.2 mm thickness, 1 m
0.2m on both sides or one side of a long laminated sheet of width
It is possible to appropriately cut and use a m-thick polyester non-woven fabric fused at a construction site.

Long fiber reinforced layer 3 laminated with non-woven fabric
The thickness of 0 means that the non-woven fabric is the thermoplastic resin layer 3 containing inorganic long fibers.
It is different depending on whether it is attached (laminated) on both sides of 8 or laminated only on one side, but it is not generally determined, but for example, when nonwoven fabric is laminated on both sides, it is usually about 0.4 to 1.0 mm thick. In the case where the felts are adhered on one surface, the one having a thickness of about 5 to 7 mm is excellent in versatility.

Further, for example, if a resin foam such as styrene or urethane having a thickness of about 25 mm is adhered to one surface of the long fiber reinforced layer 30, the property as a heat insulating waterproof layer can be utilized, and the sheet is used. The application of the laminated structure can be expanded to not only waterproof but also thermal insulation.

In the present invention, as shown in FIG.
It is preferable that a protective coating 7 is further formed on the (upper) waterproof adhesive layer 40. The protective coating film is formed by coating with an acrylic paint, an acrylic urethane paint, or the like. The protective paint contains various conventionally known inorganic or organic pigments and is colored. The color may be metallic color such as silver color and is not particularly limited.

Further, in the present invention, the long fiber reinforced layer 30
A heat insulating material layer 8 having a thickness of about 10 to 30 mm may be formed on both surfaces or one surface, preferably on the lower surface as shown in FIG.

The heat insulating material layer 8 may be formed by adhering various kinds of felts or resin foams (eg polyethylene, polyurethane, polystyrene, etc.) and laminating them by thermocompression bonding. Etc., is laminated on the surface of the long fiber reinforced layer, the resulting inorganic long fiber reinforced waterproof layer structure has an excellent heat insulating effect.

Further, in the inorganic long fiber reinforced waterproof layer structure according to the present invention, as shown in FIG. 4, the hard aggregate 9 is further fixed to the (upper) waterproof adhesive layer 40 of the surface layer (top layer). May be. In addition, on the surface of the hard aggregate 9, as shown in FIG.
The protective coating film 7 may be formed as shown in FIG.

Specific examples of the hard aggregate 9 include hard granules such as alundum, corundum, emery or silica sand. If such a hard granular material is fixed to the surface layer with a paint, a waterproof layer structure having an anti-slip effect in addition to the above effect can be formed.

The amount of such hard aggregate is not generally determined depending on the place where the waterproof layer is formed, the kind of aggregate, etc., but is, for example, about 0.5 to 2.0 kg / m ² . Used in quantity.

These hard aggregates are adhered and fixed by various paints which can form a flexible hard urethane layer, polyester layer, epoxy resin layer and the like. Normally, when a crack of 0.3 mm width is generated in the base concrete slab, the leveling-in mortar of the upper layer part is 0.
Since it cracks about 5 mm, it is said that it will be damaged if the stretchability of the waterproof layer provided thereon decreases.
Even in such a situation, in the inorganic long fiber reinforced waterproof layer structure according to the present invention, the tensile strength is large, the viscoelasticity is excellent, and the shear elastic modulus at low temperature and high temperature is in a suitable range. Therefore, it can withstand cracks caused by the movement (movement, movement) of the base concrete.

[ Method of Forming (Installing) Waterproof Layer ] To form the waterproof layer structure according to the present invention on various substrates such as concrete, first, as shown in FIG. 2, asphalt emulsion, acrylic emulsion, Alternatively, a primer 6 made of a one-component moisture-curable urethane prepolymer or the like
After being applied to the base concrete 10 or the like and dried, a coating film-forming waterproof material 2 for forming a waterproof adhesive layer, comprising a polymer-reinforced modified asphalt or a polymer-based elastic paint, etc.
0 is applied, and the long fiber reinforced layer sheet 30 is laid before the coating film-forming waterproof material 20 is cured (usually immediately). In this case, the long fiber reinforced layer sheet is bonded to the base through the coating film-forming waterproof material.

Then, after the coating film-forming waterproof material 20 is cured, the same coating film-forming waterproof material (paint) as above is usually applied to the long fiber reinforced layer 30 in an amount of 1.0 to 2.0 mm. Long-fiber reinforced layer 3 by applying and hardening to a thickness of about 3
Combine with 0. When the coating film-forming waterproof material (paint) is cured in this manner, the waterproof adhesive layer 40 is formed on the long fiber reinforced layer 30.

When particularly high-strength physical properties are required, two or more layers of the long fiber reinforced laminating sheet can be laminated to form a long fiber reinforced layer.
In addition, in order to laminate a plurality of long fiber reinforced laminating sheets and to bond (adhere) these to each other, for example, an adhesive may be used, or heat fusion may be performed.

When a plurality of sheets for long fiber reinforced layers are arranged side by side and laid on a wide base surface, adjacent sheets may be joined by the same method as described above, and there is no particular limitation.

For example, the ends of such a plurality of sheets for a long fiber reinforced layer are brought into contact with each other, and the seam is
Whether to press and fix with an adhesive tape, or to overlap the sheet edges with an appropriate width (eg, about 10 cm width) as shown in FIG. 5, and to join the overlapped portions with an acrylonitrile adhesive or the like, Alternatively, they may be fused (for example, heated to about 180 ° C.) with a Leister welding machine or the like and fused and integrated with each other.

When carrying out waterproofing work on an uneven concrete surface or on a ground portion having a complicated shape such as a corner portion or a corner portion, a sheet for a long fiber reinforced layer is applied to the portion in advance, and then the upper portion is applied. The long fiber reinforced layer sheet may be deformed so as to conform to the shape of the underlayer by heating and softening with a leister or the like.

For applications requiring a particularly soft waterproof layer, a matrix resin for forming a long fiber reinforced layer may be used as a matrix resin.
For example, polypropylene can be used. When polypropylene is used in this way, 1% atactic polypropylene is added to ordinary polypropylene as a plasticizer.
It is possible to give flexibility to the sheet by mixing in an amount of about 0 to 50%.

Further, depending on the type and condition of the underlayer, the purpose of use of the waterproof layer, etc., the waterproof layer must be floated (insulation method). In such a case, a polyethylene insulating sheet is laid on the underlayer. While forming the coating film-forming waterproof layer 20 on the polyethylene insulating sheet,
The long fiber reinforced layer forming sheet is laid, and the sheet peripheral edge portions (end portions) are fixed with nails at intervals of, for example, about 20 cm, and adjacent long fiber reinforced (laminated) sheet peripheral portions are overlapped by, for example, about 10 cm. The superposed parts may be combined and heated by a Leister welding machine or the like to be fused.

In the past, as a method for fixing a waterproof PVC sheet, a method has been used in which the ends are nailed and temporarily fixed, and the overlapped portions are heat-fused and integrated. However, since the waterproof sheet such as vinyl chloride is soft, the nail hole is easily loosened or torn due to the crack of the base, etc., but according to the present invention, the long fiber reinforced layer sheet is extremely strong. Therefore, such trouble does not occur.

Then, on the sheet for long fiber reinforced layer thus laid, the same coating film waterproof material as described above is applied and cured, whereby the inorganic long fiber reinforced waterproof layer structure according to the present invention ( A waterproof layer) is formed.

Further, for example, as shown in FIG.
Is coated with a one-part moisture-curing primer for the primer layer 6 and then with a polymer-reinforced modified asphalt paint for forming the waterproof adhesive layer 20, and a sheet for the long fiber reinforced layer 30 (for example, a polyester non-woven fabric is applied). The long fiber reinforced sheet having a thickness of 0.6 mm is spread.

Next, the same coating material for forming the waterproof adhesive layer 40 as that described above is applied to the surface of the long fiber reinforced layer 30 and cured, and then the elasticity-forming epoxy resin is applied to the surface immediately (that is, the elasticity). While the forming epoxy resin is uncured, a high hardness aggregate 9 such as alundum, corundum, or emery is sprinkled and fixed.

Next, the above-mentioned epoxy resin coating material is further applied and cured for the top coat, and the protective coating film 7 is roughened to have durability and waterproofness, and excellent slip resistance under a low load. A waterproof layer structure having an effect can be formed.

As described above, in the present invention, the long fiber reinforced layer is arranged as an intermediate layer of the waterproof layer, and the surface thereof has elasticity such as polymer modified asphalt, urethane, elastic polyester, elastic epoxy and the like. Since it is covered with a waterproof adhesive layer (resin layer), it has a lighter weight and higher strength than conventional waterproof layers, and even if cracks etc. occur in the underlying concrete, the inorganic material of the present invention The long fiber reinforced waterproof layer structure is not damaged.

As in the conventional example, a polyester nonwoven fabric, a glass (non) woven fabric as a core material, a waterproof layer in which several base fabrics such as rugs are laminated in asphalt, vinyl chloride, urethane, and synthetic rubber. The above-described excellent performance cannot be obtained with a polymer-based waterproof layer or the like.

Further, since the long fiber reinforced layer forming the intermediate layer of the waterproof layer according to the present invention has excellent waterproof performance by itself, the long fiber reinforced layer was formed even by sudden rain during construction. In the part, it is possible to safely carry out waterproofing work without leaking water downstairs.

The long fiber-reinforced layer sheet, the long fiber-containing sheet and the inorganic long fiber-containing thermoplastic resin layer sheet are
Under constant quality control, factory production is possible in advance, so the quality is uniform, and the inorganic long fiber reinforced waterproof layer structure according to the present invention using such a laminated sheet, a rooftop,
If it is formed on a veranda, a floor, an outer corridor, a parking lot, a water tank, a pond, etc., it is possible to provide a high-strength waterproof layer although it is lighter than a conventional waterproof layer.

[0074]

The inorganic long fiber reinforced waterproof layer structure according to the present invention is lighter in weight, higher in elasticity, lower in coefficient of thermal expansion and higher in tensile strength than various conventionally used waterproof layers.
It also has excellent creep properties, can be easily installed, and is extremely effective in improving work efficiency and reducing floor load.

In particular, the long fiber reinforced layer sheet can be mass-produced in a factory or the like under strict quality and safety control. This long fiber reinforced layer sheet is separately manufactured in a factory or the like under pollution control. At the waterproof construction site, if the sheet for long fiber reinforced layer is cut to a desired size, and if necessary, it can be heated and softened according to the uneven shape of the base to be stuck, the glass fiber etc. will not scatter and the work safety It is extremely effective from the viewpoints of securing the property and preventing pollution.

That is, the waterproof layer structure according to the present invention has a core material of, for example, 0.2 mm thickness and a tensile strength of 75 kgf.
It has a long fiber reinforced layer (sheet for long fiber reinforced layer) having a strength of / cm, and further, the surface of the long fiber reinforced layer, that is, both upper and lower sides and side surfaces of the long fiber reinforced layer are as described above. Since it is covered with a strong waterproof membrane (waterproof adhesive layer), it is significantly lighter than the conventional waterproof layer structure and has features such as high strength, high elasticity and low thermal expansion coefficient.
And it can be constructed in a short time at low cost.

Such a waterproof layer structure according to the present invention has excellent durability and waterproofness even under long-term harsh conditions such as a parking lot in a building and a ramp way. , No water leaks downstairs and the load is low. In particular, a waterproof layer structure in which a hard aggregate is fixed to the surface and the surface is roughened is extremely effective as a waterproof layer structure for a place where an anti-slip effect is also required.

[0078]

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

In the following Examples and Comparative Examples,
"%" Means "% by weight" unless otherwise specified.

[0080]

[Example 1] [Preparation of polymer-reinforced modified asphalt coating] The polymer-reinforced modified asphalt coating was prepared by using the following polymer component (a).
9 kg of Portland cement and 3 kg are mixed and stirred,
Then, 8 kg of the asphalt component (b) was added and the mixture was stirred until it became sufficiently uniform.

Of these, the asphalt component (a) was prepared by emulsifying and dispersing asphalt having a softening point of 85 ° C. with an emulsifier [nonylphenol ethylene oxide adduct], and further adding 100% by weight of the obtained emulsified dispersion to the asphalt. It is an asphalt emulsion (solid content concentration 55%) in which styrene-butadiene rubber latex is mixed in an amount of 10% in order to impart heat stability and viscoelasticity.

The polymer component (b) has an average molecular weight of 30.
00 polyether polyol and tolylene diisocyanate (TDI) as a polyaddition product to give free NCO of 3.7.
It is a urethane prepolymer containing a terminal isocyanate group having a weight percentage. [Polyester non-woven fabric fusion-bonded sheet] The glass fiber reinforced laminated sheet (also referred to as "polyester non-woven fabric fusion-bonded sheet") fused with the polyester non-woven fabric has the following composition on both sides of the glass fiber reinforced laminated sheet. 2 mm
It is made by fusing a thick polyester non-woven fabric (trade name Preglon: Mitsui Toatsu Chemical Co., Ltd. 0.6 mm).

The above-mentioned glass fiber reinforced laminated sheet has, for example, two layers of 0.1 mm-thick sheets in which polypropylene is used as a matrix and long glass fibers as a core material are oriented in one direction. The glass long fibers are laminated so that the orientation directions thereof are orthogonal to each other.

The glass content is contained in an amount of 70% by weight. "Inorganic long fiber reinforced thermoplastic resin layer (polyester non-woven fabric fusion sheet)" formed by fusing 0.2 mm thick polyester non-woven fabric on both sides of the glass fiber reinforced laminated sheet having such a structure (trade name Pregron: Mitsui Toatsu Chemical Co., Ltd. 0.6 mm) is used in the following example. [Formation of waterproof layer structure] Primer [acrylic emulsion (resin solid content concentration: 50%):
90 wt%, No. 7 silica: 10% mixed to form a loose paste] 0.2 kg / m ²
Was applied.

After the primer was dried, the above-mentioned "polymer-reinforced modified asphalt paint" as a waterproof film was applied on the primer layer in an amount of 1.2 kg / m ² . Immediately after the application of the "polymer-reinforced modified asphalt paint" in this manner, the polyester nonwoven fabric fused sheet was spread.

After spreading, when left for about 20 hours (20 ° C.), the polymer-reinforced modified asphalt paint was cured and the polyester nonwoven fabric fused sheet was completely bonded. Then
The same polymer-reinforced modified asphalt paint as described above was applied to the surface of the polyester non-woven fabric fused sheet in an amount of 1 kg / m ² and cured to form an inorganic long fiber-reinforced waterproof layer structure. In the obtained inorganic long fiber reinforced waterproof layer structure, the thickness of each layer is [primer layer 0.1 mm / polymer reinforced modified asphalt layer 1 mm / long fiber reinforced thermoplastic resin layer 0.
6mm / polymer reinforced modified asphalt layer 0.8mm]
And the total thickness was about 2.5 mm.

In order to further improve the weather resistance of the obtained waterproof layer (inorganic long fiber reinforced waterproof layer structure) and to enhance protection,
Acrylic resin-based paint [pigment-colored acrylic resin emulsion] colored on the surface was applied so that the dry film thickness was 0.5 mm.

An example in which an acrylic urethane-based paint or a silver-colored paint was applied in the above-mentioned thickness in place of the acrylic-based paint was also carried out.

[0089]

[Example 2] As a primer on a concrete base,
One-part moisture-curable urethane prepolymer (free NCO:
3%) in an amount of 200 g / m ² and dried to the extent that it does not adhere to the fingers, and then 100% of the elastic-forming unsaturated polyester resin is applied on the semi-cured film of the urethane polymer.
A mixture of methyl ethyl ketone peroxide (55% DMP solution) added as a curing agent in an amount of 2% was mixed and applied in an amount of 1.0 kg / m ² , and before the curing of the unsaturated polyester resin, The same "polyester non-woven fabric fused sheet" (trade name Preglon: Mitsui Toatsu Chemical Co., Ltd. 0.6 mm) similar to that used in 1 was spread.

Next, for the top coat, 100% of the above elastic-forming unsaturated polyester resin was used as a curing agent of methyl ethyl ketone peroxide [55% DMP].
(DMP: dimethyl phthalate) solution] in an amount of 2%, and a coloring pigment, paraffin wax, and the like in an appropriate amount are applied at an amount of 0.5 kg / m ² and cured to give about 0.5 mm. A thick top coat film was formed to form an inorganic long fiber reinforced waterproof layer structure. The waterproof layer (inorganic long fiber reinforced waterproof layer structure) thus obtained has a thickness of each layer of [urethane prepolymer layer 0.1 mm / elastic unsaturated polyester resin layer 1 mm / polyester nonwoven fabric fusion sheet layer 0. 6 mm / elastically unsaturated polyester resin layer 0.
5 mm], which is about 2.2 mm in total, is used for waterproofing such as rooftops of buildings, parking lots, balconies, floors, corridors, and corrosion-resistant floors, and has excellent quick-curing properties, coating film physical properties, Excellent water resistance, chemical resistance, and weather resistance.

[0091]

Example 3 [Carbon long fiber reinforced laminated sheet] Example 1 was repeated except that carbon long fibers were used in place of the glass fibers in the "polyester nonwoven fabric fusion-bonded sheet" used in Example 1 above.
A long carbon fiber reinforced laminated sheet was produced in the same manner as the polyester nonwoven fabric fusion-bonding sheet. [Formation of Inorganic Long Fiber Reinforced Waterproof Layer Structure] The same one-component moisture-curable urethane prepolymer as used in Example 1 was applied as a primer on a concrete base in an amount of 200 g / m ² , and after drying, The same polymer-reinforced modified asphalt paint as above was applied in an amount of 1.2 kg / m ² , and immediately thereafter, the “carbon long fiber-reinforced laminated sheet” was spread.

Polymer-reinforced modified asphalt paints as described above
After curing, epoxy equivalent 185 bisphenol A
Type liquid epoxy resin as a main component and polyamide compound
(Has a free amino group and contains an aliphatic polyamine and dimer fat.
Condensation product with aliphatic group having primary or secondary amino group
And a heterocyclic diamine modified product as a curing agent
1.0 kg / m of synthetic epoxy resin² The amount of the above "car
"Bon long fiber reinforced laminated sheet"
Corundum (steel ball) with a diameter of 2 to 3 mm is 1 kg / m ²Percent of
It was sprinkled together and fixed.

Further, for the top coat, the same elasticity-forming epoxy resin as described above was applied in an amount of 0.7 kg / m ² . The waterproof layer (inorganic long fiber reinforced waterproof layer structure) thus obtained has a thickness of each layer [urethane polymer layer 0.1 mm / “polymer reinforced modified asphalt layer 1 mm
/ Carbon long fiber reinforced laminated sheet layer 0.6 mm / corundum-containing elastic epoxy resin layer average 3 mm], the average is 4.7 mm overall, and since high strength can be obtained especially in a thin layer, the floor surface of the parking lot As a waterproof layer structure for a particularly severe application such as a lampway, a light weight and an excellent anti-slip effect were obtained.

[0094]

Example 4 [Felt Fused Sheet] A glass fiber reinforced laminated sheet (also referred to as “felt fused sheet”) to which the felt is adhered is a 0.4 mm thick glass fiber reinforced laminated sheet having the following constitution. 10 mm thick felt is adhered to one side of the product (trade name Preglon: manufactured by Mitsui Toatsu Chemicals, Inc.).

The above-mentioned glass fiber reinforced laminated sheet is, for example, a long sheet having a thickness of 0.4 mm and a width of 1 m, polypropylene is used as a matrix resin, and 50% by volume of glass long fibers as a core material is contained inside the sheet. It is included in quantity. Moreover, the glass long fibers contained in the glass fiber reinforced laminated sheet are laminated in the thickness direction of the sheet (usually two layers), and the glass long fibers constituting each layer are
The glass fiber layers are oriented in one direction and closely arranged, and the glass fiber layers are laminated so that the orientation directions of the glass fibers are substantially orthogonal to each other between adjacent upper and lower glass fiber layers.

A felt adhesive sheet (commercial name Pregron: manufactured by Mitsui Toatsu Chemicals, Inc.) obtained by adhering a felt having a thickness of 10 mm to one surface of the glass fiber reinforced laminated sheet having such a constitution is used. [Formation of Inorganic Long Fiber Reinforced Waterproof Layer Structure] The felt adhesive sheet is adhered to a concrete slab with an acrylonitrile adhesive so that the felt side is the lower side, and on this felt adhesive sheet, as in Example 1. Then, a polymer-reinforced modified asphalt paint was applied.

The inorganic long fiber reinforced waterproof layer structure thus obtained has excellent heat insulating properties and does not cause blistering.
Even if cracks occur in the concrete base, the inorganic long fiber reinforced waterproof layer structure (waterproof layer) does not break. Further, according to this waterproof layer structure, it is possible to endure severe applications and drastically reduce the construction cost without placing a pressing mortar on the waterproof layer as in the conventional normal construction method. [Formation of Inorganic Long Fiber Reinforced Waterproof Layer Structure Using Urethane Foam-Based Adhesive Sheet] Also, instead of the felt in the felt adhesive sheet, a polyurethane foam having a thickness of about 25 mm is adhered to one side (trade name: Pregron: Mitsui Toatsu Chemical Co., Ltd.) was used to form an inorganic long fiber reinforced waterproof layer structure in the same manner as described above, and the same effect as the inorganic long fiber reinforced waterproof layer structure using the felt adhesive sheet was obtained. Was given.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an example of a waterproof layer structure according to the present invention. In FIG. 1, (a) is a cross-sectional view of an essential part showing an example of the waterproof layer structure according to the present invention, and (b) of FIG.
It is sectional drawing of the long fiber reinforced layer (long fiber reinforced laminated sheet) which comprises the waterproof layer structure which concerns on this invention.

FIG. 2 is a sectional view of an essential part showing an example of a waterproof layer structure according to the present invention.

FIG. 3 is a cross-sectional view of an essential part of a waterproof layer structure according to the present invention having a heat insulating material layer.

FIG. 4 is a cross-sectional view of a main part of an inorganic long fiber reinforced waterproof layer structure according to the present invention, which has an anti-slip effect.

FIG. 5 is an example showing a state in which sheets for long fiber reinforced layers are stacked in the case of forming the waterproof layer structure according to the present invention.

[Explanation of symbols]

1,36,36a, 36b ··· Inorganic filaments 2 ··· Thermoplastic resin 3,34 ··· Nonwoven fabric (polyester nonwoven fabric) 6 ··· Primer layer (primer) 7 ··· Protective coating film (Protective paint) 8 ··· Thermal insulation layer (insulation material) 9 ··· Hard aggregate 10 ··· Base (concrete etc.) 20 ··· (Lower part) Waterproof adhesive layer (coating film forming property) Waterproof material, waterproof adhesive material) 30 ... Long fiber reinforced layer (sheet for long fiber reinforced layer) 30a, 30b ... Inorganic long fiber orientation direction 36 (a), 36 (b) ... Inorganic Long-fiber 38 ... Inorganic long-fiber-containing thermoplastic resin layers 38a, 38b ... Inorganic long-fiber-containing thermoplastic resin sheet layer (long-fiber-containing sheet layer) 40 ... (Upper) waterproof adhesive layer (Waterproof adhesive material) 50 ... Inorganic long fiber reinforced waterproof layer structure (waterproof layer)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Oka 3-5-5 Kasumigaseki, Chiyoda-ku, Tokyo Mitsui Toatsu Chemical Co., Ltd. (56) Reference JP-A-7-214714 (JP, A) Japanese Patent Laid-Open No. 7-232408 (JP, A) Japanese Patent Laid-Open No. 60-232408 (JP, A) Japanese Patent Laid-Open No. 60-33968 (JP, A) Japanese Patent Laid-Open No. 59-199962 (JP, A) Japanese Patent Laid-Open No. 59-89364 (JP , A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B32B 1/00-35/00 E04D 5/00-12/00

Claims (4)

(57) [Claims] 1. A waterproof adhesive layer applied on the surface of a base, a long fiber reinforced layer adhered to the surface of the base via the waterproof adhesive layer, and a surface coated on the surface of the long fiber reinforced layer. A waterproof structure having a waterproof adhesive layer, wherein the long fiber reinforced layer is laminated with a polyester nonwoven fabric on both sides of an inorganic long fiber-containing thermoplastic resin layer, or
Further, a heat insulating material is adhered to the lower surface, and the inorganic long fiber-containing thermoplastic resin layer contains a large number of inorganic long fibers arranged in one direction along a direction substantially parallel to the layer. Two or more inorganic long fiber-containing thermoplastic resin sheet layers are laminated, and these inorganic long fiber-containing thermoplastic resin sheet layers are laminated so that the inorganic long fibers in the laminated sheet layers are substantially orthogonal to each other. Inorganic long fiber reinforced waterproof layer structure characterized by being. 2. An inorganic long fiber reinforced waterproof layer structure, wherein a hard aggregate is further fixed to the surface waterproof adhesive layer. 3. A thermoplastic resin sheet containing a large number of inorganic long fibers oriented in one direction along a direction substantially parallel to the layers so that the orientation directions of the inorganic fibers in the laminated sheet are substantially orthogonal to each other. The sheet for inorganic long fiber reinforced thermoplastic resin layer obtained by laminating two or more sheets on the above and heat-fusing, laminating polyester nonwoven fabric on both sides of the obtained fusion-bonding sheet, or further adhering heat insulating materials Is adhered to the underlying surface via a waterproof adhesive layer applied on the underlying surface, and then a waterproof adhesive material is applied onto the obtained inorganic long fiber reinforced thermoplastic resin layer. Method for forming an inorganic long fiber reinforced waterproof layer structure. 4. A sheet for inorganic long fiber reinforced thermoplastic resin layer is heated and softened to be deformed so as to conform to a complicated base shape, and is adhered to the base surface via a waterproof adhesive layer. The method for forming an inorganic long fiber reinforced waterproof layer structure according to claim 3.