JPH11172860A - Connecting member made of fiber-reinforced resin for stretching waterproof sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a connecting member made of a fiber-reinforced resin for stretching a waterproof sheet firmly on a waterproof execution surface by laminating and unifying resin films consisting of a thermoplastic elastomer to both surfaces of a fiber sheet, which is composed of chemical fibers and in which tensile strength in the plane direction has a specific value or more in all directions. SOLUTION: The connecting member made of a fiber-reinforced resin for stretching the waterproof sheet is constituted in such a manner that fibers, in which tensile strength in the plane direction has 450 kgf/100 cm or more in all directions, are selected as a fiber sheet, resin films made up of a thermoplastic elastomer are laminated from both surfaces of the fiber sheet and the resin films are unified so as to impregnate the inside of the layer of the fiber sheet with at least the resin by heating and pressing. When the fiber sheet has tensile strength less than 450 kgf/100 cm or the fiber sheet and the resin films are not laminated and unified sufficiently, the connecting member manifesting expected tensile strength as the connecting member cannot be manufactured. Accordingly, the connecting member can be joined firmly with a waterproof execution surface by manufacturing the connecting member in the same material quality as the waterproof sheet to be objected or forming the connecting member in a form that the resin films having compatibility are reinforced with fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining member used for joining a waterproof sheet to a concrete body when waterproofing a flat roof or the like on the roof of a concrete building using a synthetic resin waterproof sheet. About.

[0002]

2. Description of the Related Art Conventionally, when a waterproof roof made of a synthetic resin is used for waterproofing a flat roof or the like of a concrete building,
Partially join the waterproof sheet to the concrete body surface,
The so-called mechanical fixing method is widely used.

A typical waterproof sheet used for the waterproofing is a sheet made of a soft polyvinyl chloride resin. Such a sheet is not suitable for workability, workability, durability, cost and the like at the time of manufacture. Widely used from. In particular, since it is suitable for a so-called mechanical fixing method in which a waterproof sheet is partially joined to and stretched on a waterproof construction surface, its use is high.

As described above, in order to stretch a waterproof sheet made of a soft polyvinyl chloride resin on the surface of a concrete body by a mechanical fixing method, it is usually performed through a joining member. For example, a so-called PVC steel sheet in which a steel sheet is covered with a soft polyvinyl chloride resin layer made of the same material as the waterproof sheet via an adhesive is used.
The joining member is provided with rigidity by a metal serving as a core material, and has a soft polyvinyl chloride resin layer coated on the core material imparting rust prevention of the core material and joining properties with a waterproof sheet.

As a waterproof sheet used for waterproofing, in addition to the above-mentioned soft polyvinyl chloride resin, in recent years, a waterproof sheet made of various thermoplastic elastomers has begun to be widely used. For example, it is a polyolefin-based thermoplastic elastomer, a polyvinyl chloride-based thermoplastic elastomer, or the like. Above all, a waterproof sheet made of a polyolefin-based thermoplastic elastomer is excellent in cold resistance, weather resistance and the like, and is widely used.

However, in waterproofing construction using the conventional mechanical fixing method, since the compatibility between the polyolefin-based thermoplastic elastomer and the soft polyvinyl chloride resin is poor and the mutual bonding property is poor, the conventional PVC steel sheet is used. There is a problem that a joining member cannot be adopted.

To solve the above-mentioned problems, in order to make it possible to join a waterproof sheet made of a polyolefin-based thermoplastic elastomer, a steel sheet coated with a resin film made of the same polyolefin-based thermoplastic elastomer or polyolefin-based resin is used. Although it is conceivable to use a material as a joining member, in practice, these resin films are not easily adhered to a steel sheet, and have an adhesive property that can withstand long-term outdoor use as a joining member and a PVC steel sheet. At present, there is no steel plate for joining members that has the same price as.

[0008] In addition, since steel plates are used as the core material as in the conventional joining members, rusting over time is inevitable, and sometimes the rusting of the joining members causes water leakage, and the waterproof function of the entire waterproof surface is reduced. There is a problem that is inhibited.

[0009]

The joining member used in the waterproofing construction method to which the mechanical fixing method is applied is fixed firmly to the construction surface of concrete or the like by nails, screws or the like, and then waterproofed on the upper surface thereof. Must be able to control the thermal expansion and contraction of the waterproof sheet and the movement of the position of the waterproof sheet due to negative pressure, maintain the strength that can withstand this, and stably anchor the waterproof sheet. . Specifically, the tensile strength of the joining member itself, the joining strength with the waterproof sheet, and the adhesion between the constituent layers of the joining member are required as essential requirements for performance, and in particular, a constant value is required for the tensile strength of the joining member. There is a strong demand for something to secure.

The material of the surface layer of the joining member is desirably the same as that of the waterproof sheet in order to ensure a sufficient joining strength with the waterproof sheet to be used. It is necessary that they have compatibility with each other.

The present invention is based on the above background,
When a waterproof sheet made of thermoplastic elastomer with excellent cold resistance and weather resistance, especially a waterproof sheet made of a polyolefin-based thermoplastic elastomer, is stretched over the waterproof construction surface such as the roof on the roof of a concrete building, in addition to waterproofness. Another object of the present invention is to provide a joining member that can be firmly joined to a waterproof construction surface, has good joining with the waterproof sheet, and has a high durability required for stretching the waterproof sheet.

[0012]

According to the first aspect of the present invention, there is provided a fiber sheet made of chemical fiber and having a tensile strength in a plane direction of 450 kgf / 100 cm or more in all directions. A gist of a fiber-reinforced resin joining member for stretching a waterproof sheet, wherein a resin film made of an elastomer is laminated and integrated.

That is, the fiber reinforced resin joining member for stretching a waterproof sheet according to the first aspect of the present invention comprises a thermoplastic elastomer made of the same material or a different material as the waterproof sheet stretched on the waterproof construction surface. Are laminated on both sides and integrated with each other by heating and pressing.

The thermoplastic elastomer used in the first invention is a polyolefin-based thermoplastic elastomer,
Polyvinyl chloride elastomer, etc. Specifically, the hard phase is polyethylene or polypropylene, and the soft phase is E
A thermoplastic elastomer having a crystalline phase composed of PDM, butyl rubber, and ethylene propylene rubber; and a thermoplastic elastomer having a hydrogen bond or a crystalline layer composed of crystalline polyvinyl chloride as a hard phase and nitrile butadiene rubber (NBR) as a soft phase.

According to a second aspect of the present invention, a resin film made of a polyolefin resin is formed on both sides of a fiber sheet made of chemical fiber and having a tensile strength in a plane direction of 450 kgf / 100 cm or more in all directions. The gist of the present invention is a fiber-reinforced resin joining member for stretching a waterproof sheet, which is characterized by being laminated and integrated.

That is, the fiber reinforced resin joining member for stretching a waterproof sheet according to the second aspect of the present invention includes a waterproof sheet stretched on a waterproof construction surface and a polyolefin resin of a different material, which is bonded to both sides of the fiber sheet. They are laminated and integrated with each other by heating and pressing.

The polyolefin resin used in the second invention is specifically polyethylene or polypropylene.

Further, the resin film made of the thermoplastic elastomer of the first invention and the resin film made of the polyolefin resin of the second invention used for the fiber-reinforced resin joining member of the present invention are both waterproof. It is suitable for joining with a waterproof sheet made of a thermoplastic elastomer to be applied, and among them, the polyolefin-based thermoplastic elastomer which is the thermoplastic elastomer of the first invention is most preferable.

Examples of the fiber sheet used for the joining member include synthetic fibers such as glass fiber, carbon fiber and aramid fiber, and fiber sheets made of chemical fiber such as silicon carbide. It is assumed that the above configuration is adopted. The form of the fiber sheet is preferably a woven or nonwoven fabric made of long fibers, or a form formed by impregnating the woven or nonwoven fabric with a resin. Furthermore, it is more preferable that the directions of the single fibers in the individual fiber sheets are formed so as to overlap each other in an irregular direction in the range of 0 to 90 degrees. Further, a sheet obtained by laminating two or more fiber sheets with their directions shifted from each other by 90 degrees is most preferably used. In this case, when two or more individual fiber sheets are used alone, the tensile strength is 450
Even if the value is less than kgf / 100 cm, it can be applied as long as a predetermined number of sheets stacked on each other show a value equal to or higher than the above-described tensile strength of 450 kgf / 100 cm.

In general, in the construction of a waterproof sheet by a mechanical fixing method, a joining member for stretching the waterproof sheet is required to have a tensile strength in a plane direction of at least 450 kgf per 100 cm width in all directions. Therefore, in response to such a demand, in the present invention, as a fiber sheet, the tensile strength in the plane direction is 450 in all directions.
A fiber having a kgf / 100 cm or more is selected, a resin film made of the thermoplastic elastomer or the polyolefin resin is laminated on both sides thereof, and heated and pressed to be integrated so that at least the resin is impregnated into a layer of the fiber sheet. . The tensile strength of the fiber sheet is 450 kgf / 1
If it is less than 00 cm, or if the fiber sheet and the resin film are not sufficiently laminated and integrated, the joining member cannot exhibit the desired tensile strength as the joining member. In this case, the integration of the fiber sheet and the resin film by heating and pressing is most preferably performed by, for example, a hot press method, but may be performed by another method such as a roll press method.

According to the above-mentioned studies on the tensile strength, the tensile force applied to the waterproof sheet at the beginning of the construction of the waterproof sheet is approximately 4 kgf / cm ² , and the waterproof sheet 12 years after the construction is laid. Was 34.5 kgf / cm ² . Note that the measured value of the tensile force, after marking two points indicating the reference dimensions on the waterproof sheet in the laid state, release each waterproof sheet from the laid state, and apply a tensile tester to the waterproof sheet contracted by release. The tensile strength was measured when the dimension between the two points indicating the reference dimension became the reference dimension.

Therefore, according to the present invention, the tensile force applied to the joining member having a thickness of 10 mm and a width of 100 cm after 12 years is 34.5 kgf / cm ^2.
345 kgf / 100 cm, and the minimum tensile strength of the fiber sheet is 450 kgf / 100 cm, which is a value that allows for a safety factor of about 30% in the aforementioned value 345 kgf / 100 cm. did. In addition, the value of the tensile strength of the fiber sheet in the present invention is a value when the tensile strength of the fiber sheet is measured with a width of 100 cm, and this value is kgf / 100 cm
Is expressed in units of

Further, the front and back surfaces of the joining member in which the resin film is laminated on both sides of the fiber sheet have a thickness of the surface layer made of the resin film in order to secure the joining strength with the waterproof sheet and the abrasion resistance of itself. And the thickness of the back layer is preferably in the range of 0.3 to 1.0 mm. In particular, if the thickness of the surface layer is less than 0.5 mm, there is a problem in the bonding property with the waterproof sheet, and the thickness of the back layer is 0.3 mm.
If it is less than mm, the abrasion resistance is reduced, and it cannot be used as a joining member. In addition, if the total thickness exceeds 3.0 mm, the joining member becomes bulky and blocks the water gradient of the groundwork. As a result, there is a portion that is opposite to the water gradient of the designed waterproof construction surface and has an inverse gradient, and the appearance of the waterproof layer It is not suitable because it not only deteriorates the quality but also may cause water to collect on the waterproof sheet surface.
Therefore, regarding the overall thickness, not only the thickness of the resin film but also the thickness and the number of the fiber sheets should be determined in consideration of the components of the overall thickness.

The fiber reinforced resin joining member for stretching a waterproof sheet according to the present invention is a joining member suitable for stretching a waterproof sheet made of a thermoplastic elastomer on a body surface of concrete or the like by a mechanical fixing method. Without using steel plates, the same material as the target waterproof sheet, or using a different material but compatible resin film, which was reinforced with fibers, the conventional PVC steel plate A waterproof sheet that has the desired performance without causing rust or collapsing due to rust like
It can be easily and firmly joined to the waterproof construction surface,
Moreover, it has the function of increasing the durability of the entire waterproof structure.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
A description will be given according to examples and drawings and in comparison with comparative examples.

First, as a resin film to be laminated on both sides of the fiber sheet used in the examples, a film made of a polyolefin thermoplastic elastomer is used in Examples 1 to 9, and a film made of a polypropylene is used in Examples 10 to 18. Film. In the following examples and comparative examples, the polyolefin-based thermoplastic elastomer is abbreviated as TPO, and the polypropylene is abbreviated as PP.

The following was used as the fiber sheet. Sheet-shaped fiber A: Resin-impregnated glass long fiber sheet (trade name: Pregron part number: L15PN, manufactured by Mitsui Toatsu Chemicals) B: carbon fiber sheet (trade name: trading card, part number: T300A, manufactured by Toray Industries) C: aramid Fiber sheet (product name: Kevler, product number: Kevlar 49, manufactured by Dupont) D: Glass fiber sheet (product number: H25F5104, manufactured by Unitika Glass Fiber) E: Glass fiber sheet (product number: H20F5104, manufactured by Unitika Glass Fiber)

Examples 1 to 9 For each of the examples, the type and number of the fiber sheets and the thickness of each of the two TPO films as the thermoplastic elastomer were set as shown in Table 1, and FIG. As shown, a set number of the fiber sheets (1) are sandwiched into 2 pieces.
The laminate was sandwiched between the two TPO films (2) and (2), and then heated and pressed by a hot press to be integrated into a fiber-reinforced resin laminate (3). Note that FIG. 1 shows a case where two fiber sheets (1) and (1) are used, and they are superimposed on each other with a direction shifted by almost 90 degrees.

[0029]

[Table 1]

The resin laminate obtained above was used as a joining member for attaching a waterproof sheet, each of these members was tested based on the following test items and test methods, and the performance was evaluated. The results are shown in Table 2.

Tensile strength test Method: Using an Instron tensile tester, a sample having a length of 150 mm and a width of 25 mm was used, and the tensile speed was 200 mm / mi.
It measured on condition of n. Evaluation: As a criterion, 12 kgf / 25 mm or more was evaluated as good (ｆ), and less than 12 kgf / 25 mm was evaluated as poor (x). In addition, the said numerical value 1
The value of 2 kgf / 25 mm is a corrected value obtained by converting the tensile strength of the fiber sheet, 450 kgf / 100 cm, defined in the present invention, to a sample width of 25 mm in a tensile test.

Bonding strength test Method: Using a sample obtained by bonding a waterproofing sheet made of a polyolefin-based thermoplastic elastomer to a bonding member cut to a length of 150 mm and a width of 25 mm by an Instron tensile tester, at a pulling speed of 200 mm / min. The measurement was performed by 180-degree peeling in the longitudinal direction between the joining member and the waterproof sheet. Evaluation: As a criterion, a case where material destruction of either layer of the joining member and the waterproof sheet is accompanied, but no delamination of both layers occurs (good), and a case where delamination of both layers occur simultaneously Slightly good (△), poor when only delamination occurs (×)
And

Adhesion test Method: Using a 5% strength salt solution, the sample was sprayed with salt water at room temperature for 2000 hours. Evaluation: The case where there was no abnormality such as rusting of the sample and delamination between the fiber sheet and the resin fill was evaluated as good (○), and the case where such abnormality was observed was evaluated as poor (×).

Abrasion resistance test Method: The Taber type abrasion test (4000 revolutions) was performed on the back surface of the joint member at the time of use. Evaluation: Regarding the sample after the test, the case where the fiber was not exposed at all was evaluated as good (○), and the sample slightly exposed was evaluated as poor (×).
And

Finished appearance test (unevenness of waterproof sheet surface) Method: The above-mentioned joining member was fixed on a 1 m square slate.
Further, a sample having a waterproof sheet stretched thereon was prepared, placed horizontally, sprinkled with water, and then observed while gradually tilting. Evaluation: A case where the water pool was slightly left was evaluated as poor (x), and a case where it was not so was evaluated as good (O).

The evaluation of each item in the above embodiment is comprehensively judged. If the above evaluation items are all good (○), the overall evaluation is good (○), and above all, it is an essential requirement in terms of performance. Tensile strength, bonding strength and adhesion are all good (○) or slightly good (△), but those with poor abrasion resistance or finished appearance (×) are evaluated as fairly good (△), Furthermore, when at least one of the above items was defective, the overall evaluation was evaluated as defective (x).

[0037]

[Table 2]

As is clear from Table 2, the first aspect of the present invention is as follows.
The joint member made of fiber reinforced resin for stretching a waterproof sheet according to the invention of the present invention is the same as that of the first to sixth embodiments except that the tensile strength, the joining strength with the waterproof sheet, the abrasion resistance, the finished appearance of the waterproof sheet, etc. It is capable of fully exhibiting all the necessary performances as a bonding member for use, and the overall evaluation is good (○). In Examples 7 to 9, Example 7 is slightly good in bonding strength (△). In Example 8, the finished appearance is
In Example 9, all were good (良) except that the wear resistance was poor (×), and the overall evaluation was somewhat good (△).

Comparative Examples 1-2 For each comparative example, in the same manner as in Examples 1 to 9, the type and number of the fiber sheets, and the thickness of each of the two TPO films as the thermoplastic elastomer were as follows: Each was set as shown in Table 1, and the set number of the fiber sheets were sandwiched and sandwiched between the two TPO films, and then integrated by heating and pressing as in the example. For use.

Next, the comparative laminate obtained above is
The same test as in the above example and performance evaluation were performed, and the evaluation results are shown in Table 2. As is clear from Table 2, all of the comparative laminates have poor internal tensile strength (x), which is an important performance as a joining member for installing a waterproof sheet, and cannot exhibit the performance. Was.

Comparative Examples 3 and 4 Comparative Example 3 was a TPO coated steel sheet (steel thickness 0.40 mm,
A comparative plate made of a TPO film having a thickness of 0.25 mm / upper and lower surfaces was used. Comparative Example 4 was a vinyl chloride resin-coated steel plate (a steel plate having a thickness of 0.40 mm and a vinyl chloride resin film having a thickness of 0.25 mm). A test was performed in the same manner as in the example using a comparison plate composed of (/ upper and lower surfaces), and the evaluation was performed in the same manner. As a result, as shown in Table 2, the adhesiveness, which is one of the properties required as a joining member for attaching a waterproof sheet, was clearly inferior.

Examples 10 to 18 In each example, as shown in Table 3, except that the TPO film used in Examples 1 to 9 was replaced with a PP film. Similarly, a fiber-reinforced resin laminate (3) shown in FIG. 1 was obtained.

[0043]

[Table 3]

The resin laminate obtained above was tested as a joining member for attaching a waterproof sheet in the same manner as in Examples 1 to 9, and the same evaluation was performed. Table 4 shows the evaluation results.
It was shown to.

[0045]

[Table 4]

As is apparent from Table 4, the second embodiment of the present invention
The joint member made of fiber-reinforced resin for stretching a waterproof sheet according to the invention of the present invention is different from the tenth to the fifteenth examples in that the tensile strength, the joining strength with the waterproof sheet, the abrasion resistance, the finished appearance of the waterproof sheet, etc. It is capable of fully exhibiting all the performances required as a bonding member for a vehicle, and the overall evaluation is good (○). In Examples 16 to 18, Examples 1 to 5
No. 6 was slightly good (に お い て) in terms of bonding strength, and in Example 17 the appearance was finished, and in Example 18, the abrasion resistance was all poor (×), except for poor wear. It was slightly good (△).

Comparative Examples 5 to 6 For each comparative example, the type and number of fiber sheets and the thickness of each of the two PP films are also shown in Table 3 in the same manner as in Examples 10 to 18. After setting as shown, after laminating the set number of the fiber sheets so as to be sandwiched between two PP films in a sandwich form,
In the same manner as in the examples, heating and pressurization were performed to integrate them to obtain a comparative laminate.

Next, the comparative laminate obtained above was
The same test as in the above example and performance evaluation were performed, and the evaluation results are shown in Table 4. As is clear from Table 4, all of the comparative laminates had poor internal tensile strength (x), which is an important performance as a joining member for waterproof sheet stretching, and could not exhibit the performance. Was.

[0049]

As described above, according to the first aspect of the present invention, the fiber-reinforced resin joining member for stretching a waterproof sheet according to the first aspect of the present invention is provided on both sides of a specific fiber sheet. A resin film made of a plastic elastomer is laminated and integrated. In the second invention, as described in claim 3, a resin film made of a polyolefin resin is laminated on both surfaces of a specific fiber sheet. The first invention and the second invention
In any of the inventions described above, when waterproofing by a mechanical fixing method using a thermoplastic elastomer excellent in cold resistance, weather resistance, etc. as a waterproof sheet, open leg nails, screws, etc. on the construction surface of thermoplastic concrete etc. Of course, the waterproofing sheet can be firmly joined to the surface of the waterproofing sheet, and the movement of the joined waterproofing sheet due to thermal expansion and contraction and negative pressure can be restricted, and the strength to withstand this can be secured. Particularly, there is an effect that a high tensile strength is maintained and the waterproof sheet can be stably fixed.

The fiber reinforced resin joining member for stretching a waterproof sheet according to the present invention is a resin film laminated and integrated on both surfaces of a fiber sheet as described in the specific resin composition according to the second and fourth aspects. By using a high durability of excellent cold resistance and weather resistance, for example, a polyolefin-based thermoplastic elastomer, sufficiently improved bonding properties with a waterproof sheet made of a thermoplastic elastomer such as a polyvinyl chloride-based thermoplastic elastomer. Unlike conventional joint members made of synthetic resin steel plates, they do not rust and collapse, and have high durability in themselves. It can be reliable and can have high durability.

Further, the tensile strength in the plane direction used in the present invention is 450 kgf / 10 in all directions.
Although it has a specific form of a sheet of 0 cm or more, the material is generally very easily procurable as described in claim 5, and furthermore, a resin film laminated on both sides of the fiber Is set in a thin range as described in claim 6, so that the joining member can be finished at low cost.

In addition, the joining member according to the present invention has a small overall thickness of 3.0 mm or less, so that it does not become bulky, blocks a water gradient on a waterproof construction surface, or has a design for a waterproof surface. It has the advantage of not losing the flatness of the stretched waterproof sheet against the water gradient and not losing the flatness of the waterproof sheet, so that the appearance quality of the waterproof surface is not impaired. The thickness is within the range that ensures the body abrasion and the bonding property with the waterproof sheet, so that the durability can be significantly increased, and thus contributes to the improvement of the durability of the entire waterproof construction part There is an advantage of doing so.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a conceptual configuration of a fiber-reinforced resin joining member for stretching a waterproof sheet according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fiber sheet 2 ... TPO film 3 ... Resin laminate

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI E04D 5/06 E04D 5/06 B

Claims (6)

[Claims] 1. A resin film made of a thermoplastic elastomer is laminated and integrated on both surfaces of a fiber sheet made of chemical fiber and having a tensile strength in a plane direction of 450 kgf / 100 cm or more in all directions. Fiber-reinforced resin joining members for stretching waterproof sheets. 2. The fiber-reinforced resin joining member for stretching a waterproof sheet according to claim 1, wherein the thermoplastic elastomer is a polyolefin-based thermoplastic elastomer. 3. A resin film made of a polyolefin resin is laminated and integrated on both surfaces of a fiber sheet made of chemical fiber and having a tensile strength in the plane direction of 450 kgf / 100 cm or more in all directions. Fiber-reinforced resin joining members for stretching waterproof sheets. 4. The joint member made of a fiber-reinforced resin for stretching a waterproof sheet according to claim 3, wherein the polyolefin resin is polypropylene. 5. The fiber sheet according to claim 1, wherein the fiber sheet is made of one or more chemical fibers of glass fiber, carbon fiber, aramid fiber, and silicon carbide fiber. The bonding member made of a fiber-reinforced resin for stretching a waterproof sheet according to item 1. 6. The thickness of the resin film laminated on both surfaces of the fiber sheet is 0.5 to 2.5 mm for the surface layer and 0.3 to 1.0 mm for the back layer. The fiber reinforced resin joining member for stretching a waterproof sheet according to any one of claims 1 to 5, wherein a thickness after the fiber sheet and the resin film are integrated is 3.0 mm or less.