JP3527494B2 - MEMBRANE ROOF AND METHOD OF JOINING ROOF MEMBER USING TYPE A MEMBRANE - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a membrane roof and a method for joining roof members using a type A membrane.

[0002]

2. Description of the Related Art As is well known, in a membrane roof using a so-called A-type membrane in which a composite resin of PTFE resin (tetrafluoroethylene resin) and glass fiber is coated with a fluororesin such as FEP resin, A It is constructed by stretching the seed membrane. And, in the membrane roof, when the A-type film is weld-bonded to the joint part of the A-type film or the defective part of the A-type film on site, generally, the FEP resin film (100% FEP resin) having a thickness of about 125 to 190 μm is used. Thermal extruded products)
Is used as an adhesive.

The reason why the FEP resin film is used here is to ensure compatibility with the FEP resin used as the surface treatment material for the PTFE resin constituting the resin component of the A-type film material. Further, the thickness of the FEP resin film is determined so that the FEP resin film is melt flowed at the time of welding to ensure a sufficient amount to fill the irregularities on the surface of the A-type film as the adherend.

[0004]

However, when the FEP resin film is used for the adhesive, temporary fixing to the adherend A-type film is complicated, and it is difficult to align the end portions of the film material. However, there is a problem that a defective welding and joining is likely to occur. Further, when the welding and joining failure occurs, after re-heating the peripheral portion including the poorly-adhered portion and peeling off the film material which is the adherend, re-insertion of the FEP resin film and re-welding and joining are repeated, There was a risk that the quality would be extremely unstable.

Further, as a repairing method when partial peeling occurs due to deterioration over time, the above-mentioned reheating of the adherend → peeling of the adherend → reinsertion of the FEP resin film → welding and joining treatment is required. In addition to the complexity, there is a problem that the reliability of fusion bonding is low. The present invention has been made to solve such conventional problems, and its purpose is to be able to easily and uniformly introduce between the films to be bonded, to eliminate welding defects and to improve workability. It is an object of the present invention to provide a method for joining roof members using a membrane roof and a type A membrane, which can greatly contribute to improvement of

[0006]

The invention according to claim 1 is
In a membrane roof made by stretching A type membrane with a predetermined tension,
At the joint of the A-type film, from the A-type film through an adhesive composed of a gel-like substance obtained by adding and dispersing FEP resin powder to FEP resin (ethylene tetrafluoride / propylene hexafluoride copolymer resin) The member is welded. According to a second aspect of the present invention, in the membrane roof according to the first aspect, the member made of the type A membrane is welded across the joint portion.

According to a third aspect of the present invention, in the membrane roof according to the first aspect, a member made of the A-type film is further welded on the member made of the A-type film welded on the joint portion. It is characterized by The invention according to claim 4 is a membrane roof formed by stretching a type A membrane with a predetermined tension, and a FEP resin (tetrafluoroethylene / propylene hexafluoride copolymer resin) disk is formed in the defective portion of the type A membrane. It is characterized in that a repair member made of a type A film is welded to the version through an adhesive made of a gel-like substance in which FEP resin powder is added and dispersed.

According to the fifth aspect of the invention, the FEP resin (tetrafluoroethylene / hexafluoropropylene copolymer resin) is down-converted into FEP resin at the joint portion of the membrane roof formed by stretching the A-type membrane at a predetermined tension. An adhesive composed of a gel-like substance in which a resin powder is added and dispersed is applied, the joint is covered with a member made of a type A film, and the member made of the type A film is heated to heat the type A to the joint. It is characterized in that a member made of a film is welded.

The invention according to claim 6 is the A according to claim 5.
In a method of joining a membrane roof using a seed membrane, a member made of the above-mentioned seed membrane A welded on the joining portion is FEP resin (tetrafluoroethylene / propylene hexafluoride copolymer resin) -displaced by FEP. An adhesive consisting of a gel-like substance in which resin powder is added and dispersed is applied, another member consisting of the A-type film is superposed on this member consisting of the A-type film, and the member consisting of the other A-type film is heated. Then, another member made of the A-type film is welded on the member made of the A-type film welded on the joint portion.

According to a seventh aspect of the invention, in the defective portion of the A-type membrane of the membrane roof formed by stretching the A-type membrane with a predetermined tension,
An adhesive consisting of a gel-like substance in which FEP resin powder was added and dispersed was applied to EP resin (ethylene tetrafluoride / propylene hexafluoride copolymer resin) disversion, and this defective portion was repaired with a type A film. It is characterized in that the repair member is covered with a member and heated from the repair member side to weld the repair member to the defect portion.

The invention according to claim 8 is the method for joining a film roof using the A-type film according to any one of claims 5 to 7, wherein a jig having a heating plate temperature of 380 ° C. is used. 9
It is characterized by heating for 0 seconds. Hereinafter, the present invention will be described in detail. When the A-type films are heat-welded to each other, an FEP resin that can fill the irregularities on the film surface as an adhesive is required. Conventionally, a film thickness of 125 is used as the adhesive.
An FEP resin film of ˜190 μm was used so that 260 to 400 g / m ² of FEP resin was present at the joint.

The adhesive used in the present invention is equivalent to the conventional FEP resin film 125 to 190 μm (gel adhesive 370 in a severe working posture and working environment on the membrane roof).
˜670 g / m ² ) of FEP resin can be easily and surely applied / injected into the joint portion, and the material characteristics are such that the roof slope is 60 to 70 ° and the material property is not leaning.

The present inventor newly prepared a gel adhesive for welding (FEP concentration: 60 to 70% by weight) in which FEP resin powder was added and dispersed in FEP resin dispersion, and used as a welding and bonding material. The present invention has been completed by confirming through various experimental examinations that it is reasonable in terms of quality and construction by welding and bonding using a heat welding jig.

The FEP resin disversion is 0.2
3% by weight of FEP resin with μm diameter at a concentration of around 50% by weight
It is dispersed and stabilized by using front and rear surface active agents, and is used as a glass coating agent or a PTFE surface treatment agent. There is no document or application case report that uses this FEP resin dispersion as an adhesive for A-type film.

The present inventor, in the process of pursuing the cause of poor welding of the A-type film using the FEP resin film, has a problem that the water and water droplets existing between the A-type films as the adherends are directly defective in welding. It was confirmed experimentally that it could not be the cause. Based on this result, the inventors have come up with a method of welding a type A film using FEP resin disversion.

Here, in the case of the FEP resin concentration level of about 50% by weight, sufficient F to fill the irregularities on the surface of the A-type film.
It was difficult to secure the amount of EP resin. This means that even when the required amount of disversion corresponding to the concentration is applied or injected, the outflow to the outside of the adherend film before heating the heating plate or the rapid evaporation of water or melt during the welding It means that the outflow to the outside of the adherend due to the flow cannot be sufficient. Further, in the welding and joining using a hot platen, charring caused by the carbonization of the surfactant was generated on the welding surface, which was a cause of lowering the joining quality.

In the process of making a trial production of a high FEP resin concentration dispersant, FEP resin dispersant was mixed with FEP resin powder for paint having a center diameter of about 35 μm and water, and mixed by stirring to about 65% by weight. It was confirmed that the gel adhesive for welding with a high concentration and a dispersant as low as about 0.4% by weight eliminates the above-mentioned problems. This gel adhesive for welding is applied to the A-type film, which is the adherend, in an amount of 200 to
When 400 g / m ^{2 is} applied and the welding and joining is carried out using a heat welding jig, it has the same welding and joining strength as the case of using the FEP resin film, and the joining end face also has good joining. Was verified through experimental examination and test construction.

Further, it has been found that a gel welding adhesive for welding can be used to effectively repair even a partially defective welding due to the adhesion of the FEP resin film. Improve productivity and ensure quality even when welding welding is performed by pressing the A-type film material and the filling film material that have introduced the tension that the center part is deformed by pressing the hot plate on the spot. Expected to contribute to many.

The component contents of the adhesive used in the present invention are as shown in Table 1 below.

[Table 1] In addition, the viscosity and the total solid content (corresponding to the ratio of the mass of the FEP resin in the gel adhesive) of the adhesive having the material characteristics are shown below. The viscosity is 4000-5000 (m
Pa · s).

The measurement test method is in accordance with JIS K 7117 (Viscosity test method S method for liquid resin using a rotational viscometer). Total solid content (nonvolatile content NV: Nonvolatile Conten
t) is 60.0 to 70.0 (% by weight). The measurement test method conforms to JIS K 6833 (General test method for adhesives 6.4 Nonvolatile content).

The viscosity of a general FEP resin dispersion is 10 to 20 mPa · s, which is smooth, and flows out in an experiment simulating a roof slope.
I couldn't join. Also, with low concentration dispersion,
To apply a predetermined amount of resin to the joint surface, it is possible to apply it repeatedly, but if the applied surface is wet, you cannot repeat the application, and if you wait until the water splashes, it will become fine powder and scatter, and again the application. I couldn't.

The adhesive used in the present invention is a general FEP.
Compared to resin dispersion, the resin content is high and the surfactant is low. In addition, the component combination is determined for the following reasons. The viscosity does not flow out during work on a steep slope with a roof slope of 60 to 70 °, and the viscosity is applicable as described below.

[0023] The concentration of the surfactant is such that the surfactant is not thermally denatured to become dark brown when being melt-flowed and integrated by heat so as not to impair aesthetics and design. In the coating operation, the total solid content should ensure a sufficient amount of resin to fill the irregularities of the A-type film. Since the adhesive used in the present invention is a fluororesin equivalent to the A-type film (base material) to be joined, when it is cooled after heating, it is integrated with the A-type film fluororesin due to the mutual entanglement of molecules. Even if a peeling test is performed, the joint portion does not break, and the coating material (PTFE resin) of the base material peels from the glass fiber, resulting in a breaking property.

This is because the A-type film itself is a composite material, and the adhesion strength of the glass fiber and the coating (PTFE resin) is inferior in strength to the welded joint portion integrated by heat. By the way, when the peeling test was performed by hot-melt bonding with the A-type film used for the roof, the peel strength (in the initial state without deterioration) was 2 kgf even if the adhesion strength between the glass fiber and the coating fluororesin was weak.
/ Cm.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 shows a method for joining roof members using a membrane roof 100 and a type A membrane according to an embodiment of the present invention. In the present embodiment, the tension-introducing membrane panel 2 is formed by applying a predetermined tension (for example, 300 kgf / cm) to the A-type membrane 1 and stretching it according to a conventional method.
At this time, the end portions of each tension-introducing membrane panel 2 are fastened and fixed by fastening the ends with bolts or nuts.

For example, a padding film material (flap film material) 4 for keeping away rain is fixed to the joint portion 3 by welding and welding by one-sided pressing on site. Also, the thin film material 4
Similarly, another space-filled film material 5 is fixed on the upper part of the same by welding bonding by one-sided pressing at the site. Furthermore, another padding film material 7 is similarly fixed to the panel joint portion 6 by welding by one-sided pressing at the site.

The thin film materials 4, 5, and 7 are all made of A-type film. Here, the thin film material 4,
At the time of welding and joining 5 and 7, the adhesive 8 shown in Table 1 is applied to the joint 3 at 200 to 400 g / m ² . At this time, since the adhesive 8 has a viscosity of 4000 to 5000 mPa · s,
Even if the tension-introducing membrane panel 2 has an inclination of 60 to 70 °, it does not flow out and remains on the applied joint portion 3.

Then, for example, as shown in FIG. 2, the heat fixing jig 9 at 380 ° C. is pressed for 90 seconds from above the thin film materials 4, 5, and 7. Here, the heating dressing jig 9 has a weight of about 9
The size of the hot platen was 4 cm width × 30 cm length.
As a result, the adhesive 8 applied to the bonding portion 3 spreads uniformly on the bonding surface 3 by the pressure applied by the heat application jig 9, and the adhesive 8 unnecessary for welding protrudes from the bonding surface 3.

Thus, the padding member 4 placed on the joining portion 3 is joined to the joining portion 3 without a gap and is integrated with the coating fluororesin of the joining portion 3. Of course, another padded film material 5 placed on the padded film material 4,
The other padding film material 7 placed on the panel joint portion 6 is also joined in the same manner. Therefore, according to the present embodiment, it is not necessary to manage the film insertion position when using the conventional FEP resin film, and stable quality can be obtained.

FIG. 3 shows a method for joining roof members using a membrane roof 200 and a type A membrane according to another embodiment of the present invention. In the present embodiment, the filling film material 1 that has already been joined
The adhesive shown in Table 1 is applied to or injected into the unbonded portion, peeling, or curling that has occurred in part of 0, and the thin film material 10 is 380 ° C. from the top as in the above embodiment.
An example will be shown in which the heating jig is pressed for 90 seconds to perform partial joining.

According to the present embodiment, even if a welding defect of a small area partially occurs, the adhesive shown in Table 1 can be injected into an appropriate amount of the gap portion by a syringe or the like, and the adhesive can be similarly welded. As described above, stable welding can be performed without cutting the FEP resin film into small pieces and applying heat to a sound portion up to a size at which the FEP resin film can be inserted and peeling it off.

FIG. 4 shows a method of joining roof members using a membrane roof 300 and a type A membrane according to another embodiment of the present invention. In the present embodiment, the adhesive shown in Table 1 is applied or injected to the difficult-to-join portion 13 of the membrane tension introducing panel 12 and the step portion 14 of the membrane tension introducing panel 12, and the thinned film is filled in the same manner as in the above embodiment. An example in which a heating jig at 380 ° C. is pressed from above the material 10 for 90 seconds to perform partial joining is shown.

Also in this embodiment, the same operational effects as those of the embodiment shown in FIG. 3 can be obtained. FIG. 5 shows a method of joining a roof member using a membrane roof 400 and a type A membrane according to another embodiment of the present invention. In the present embodiment, the adhesives shown in Table 1 are applied to the defective portions 16 such as tears, tears and perforations generated in the membrane tension introducing panel 15 and the defective portions 18 such as scratches and abrasions generated in the filling film material 17. After coating and superimposing the repair members 19 and 20 made of the A-type film on it, a heat fixing jig at 380 ° C. is applied from above the repair members 19 and 20 in the same manner as in the above embodiment. An example is shown in which partial joining is performed by pressing for a second.

The repairing members 19 and 20 have shapes corresponding to the corresponding defective portions 16 and 18. Also in the present embodiment, it is possible to obtain the same effects as the embodiment shown in FIG.

[0035]

EFFECTS OF THE INVENTION According to the membrane roof of the present invention, a membrane material (flap membrane material) or the like, which is packed in the main body membrane to which tension is applied, can be weld-bonded on the spot by one-sided pressing so that the membrane can be formed. Since the members can be integrated, it is expected to greatly contribute to quality assurance and workability improvement. According to the method for joining roof members using the A-type membrane according to the present invention, in the case where a thin membrane material (flap membrane material) or the like is welded to the main body membrane under tension by one-sided pressing on the roof, In the severe construction posture and construction environment above, like the conventional joining method using FEP resin film, the film position can be accurately aligned with the joining place, the FEP resin film can be temporarily attached beforehand, and a small area can be used. There is no need to perform troublesome work such as cutting and inserting the film to the defective part according to the dimension, and it is possible to perform reasonable welding bonding in terms of quality and construction, and to eliminate welding defects.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a situation in which the welding and joining in FIG. 1 is performed.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention.

FIG. 4 is an explanatory diagram showing another embodiment of the present invention.

FIG. 5 is an explanatory diagram showing another embodiment of the present invention.

[Explanation of symbols]

1 Type A membrane 2,12,15 Tension introduction membrane panel 3 joints 4,5,7,10 Padding film material (flap film material) 6 panel joint section 8 adhesive 9 Heat fixing jig 11 Defective part 13 Difficult to join 14 Step 16 Defects such as tears, tears, and holes 17 Padding film material 18 Defects such as rubbing and abrasion 19,20 Repair parts

Front Page Continuation (72) Inventor Soichi Kitani 8-21-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main Store (72) Inventor Yoshio Tanno 8-21-1, Ginza, Chuo-ku, Tokyo Shares Takenaka Corporation Tokyo Main Store (72) Inventor Yuichi Kozuka 8-21-1, Ginza, Chuo-ku, Tokyo Stock Company Takenaka Corporation Tokyo Main Store (72) Inventor Eiji Nishimura 3 Kokubuncho, Aoba-ku, Sendai City, Miyagi Prefecture No. 4-33 In the Tohoku Branch of Takenaka Corporation (56) Reference JP 2003-171636 (JP, A) JP 61-192758 (JP, A) JP 6-346636 (JP, A) (JP 58) Fields investigated (Int.Cl. ⁷ , DB name) E04H 15/54 C09J 11/08 C09J 127/18-127/20

Claims (8)

(57) [Claims] 1. In a membrane roof formed by stretching a type A membrane with a predetermined tension, an FEP resin (tetrafluoroethylene / propylene hexafluoride copolymer resin) disversion FEP is applied to the joint portion of the type A membrane. A membrane roof characterized in that a member made of a type A film is welded through an adhesive made of a gel-like substance in which resin powder is added and dispersed. 2. The membrane roof according to claim 1, wherein the A
The membrane roof is characterized in that the member made of the seed membrane is welded across the joint portion. 3. The membrane roof according to claim 1, wherein a member made of the A-type film is welded on the member made of the A-type film, which is welded on the joint portion. Membrane roof. 4. In a membrane roof formed by stretching a type A membrane with a predetermined tension, the defective portion of the type A membrane is FEP resin (tetrafluoroethylene / hexafluoropropylene copolymer resin) disversion FEP. A membrane roof characterized in that a repairing member made of a type A film is welded through an adhesive made of a gel-like substance in which resin powder is added and dispersed. 5. FEP resin (tetrafluoroethylene / propylene hexafluoride copolymer resin) disversion is applied to the joint portion of the membrane roof formed by stretching the A-type membrane with a predetermined tension.
An adhesive composed of a gel-like substance in which a resin powder is added and dispersed is applied, and this joint is covered with a member made of the A-type film, and the member made of the A-type film is heated to heat the joint to the A-type.
A method for joining a membrane roof using a type A membrane, which comprises welding a member made of a type membrane. 6. The method for joining a membrane roof using the A-type membrane according to claim 5, wherein the member made of the A-type membrane that is welded on the joining portion is made of FEP resin (ethylene tetrafluoride. An adhesive composed of a gel-like substance in which FEP resin powder is added and dispersed is applied to a propylene fluorinated copolymer resin) dispersion, and a member made of another type A film is superposed on the member made of this type A film. Another kind of A-type film is heated by heating from the side of another kind of A-type film to weld the member made of another kind of A-type film onto the member made of the above-mentioned kind A film. Membrane roof joining method using membrane. 7. A FEP resin for FEP resin (tetrafluoroethylene / hexafluorofluoride copolymer resin) disversion is applied to the defective portion of the A-type membrane of the membrane roof formed by stretching the A-type membrane with a predetermined tension. An adhesive composed of a gel-like substance in which powder is added and dispersed is applied, and the defect portion is covered with a repairing member composed of a type A film, and the repairing member side is heated to repair the defect portion. 2. A method for joining a film roof using a type A film, which comprises welding the members of FIG. 8. The method for joining a film roof using the A-type film according to claim 5, wherein the heating plate is heated for 90 seconds using a jig having a temperature of 380 ° C. A method for joining a membrane roof using a type A membrane characterized by the above.