JP5386089B2 - PVC waterproof structure. - Google Patents

Description

TECHNICAL FIELD The present invention relates to a waterproof structure using a PVC sheet on a roof or other roof of a building, and more specifically, a PVC sheet for covering a existing PVC sheet by a mechanical fixing method with a mechanical fixing method. It relates to a waterproof structure.

Waterproof sheets made of vinyl chloride resin are often used for waterproof layers on the rooftops of buildings, etc., from the viewpoint of having many advantages such as excellent workability and weather resistance, and the structure is PVC sheet with buffer sheet on the base The PVC sheet is screwed to the base via mounting brackets at appropriate intervals. The buffer sheet is used to absorb the uneven portion of the ground.

  The waterproof layer made of the above-mentioned polyvinyl chloride sheet, which is said to be excellent in weather resistance, may cause a water leakage accident or the like due to aged deterioration of the vinyl chloride sheet or the like with the passage of many years, or water leakage actually occurs. For this reason, a new waterproof measure is required. For this purpose, the existing waterproof layer is peeled off to form a completely new waterproof layer on the base, or the existing waterproof layer is left as it is and a new waterproof layer is newly added. There are two types of measures to form a waterproof layer, but removing the existing waterproof layer increases costs and damages the base when removing the metal fixture fixed to the base by screwing in. It has a difficult face in construction, such as fear of causing damage. Therefore, today, a renovation method for constructing a new waterproof layer on the existing waterproof layer is employed.

When forming a waterproof layer with a new PVC sheet on the existing waterproof layer, a buffer sheet is interposed between the existing PVC sheet and the new PVC sheet, and then the new PVC sheet is attached with a mounting bracket. It will be fixed to the groundwork.
However, existing PVC sheets are becoming brittle due to aging, and are easily broken or crushed along with the construction work.
On the other hand, the buffer sheets that have been used in the past are made of polyethylene foam (1-2 mm thick) laminated with polyethylene cloth, etc., and are easily torn. Alternatively, puncture may occur, and the effect may extend to a new PVC sheet. In addition, if a new PVC sheet is being constructed and there is a deficiency in rain curing, water leakage may occur during the construction.
The following documents exist in relation to the present invention.
Japanese Patent Laying-Open No. 2005-264481 Japanese Patent Application No. 2007-171651

However, in the above conventional method of constructing a new waterproof layer by laying a PVC sheet on an existing PVC sheet waterproof layer, the strength of the buffer sheet used on the existing PVC sheet is insufficient. It is possible to prevent the breakage and crushing by closely adhering to this, or to prevent the breakage of fragments already broken or crushed and the breakage of the crushing pieces properly, and the buffer sheet is damaged. Moreover, not only the damage of the buffer sheet but also the existing waterproof sheet breakage pieces and crushed pieces directly affect the new PVC sheet. In addition, if a new PVC sheet is being constructed and there is a deficiency in rain curing, water leakage may occur during the construction. In order to deal with such inconveniences, the inventors of the present application have previously provided the invention disclosed in Patent Document 2. Although the above-mentioned disadvantages have been eliminated by this invention, there are some problems to be improved. That is, in the invention according to Patent Document 2, the buffer sheet requires a release paper (release film) for covering the adhesive layer on the back surface. There is a risk of hindering construction efficiency. Also, since workers often peel off the release paper (release film) and throw it away into a waste bag at random, a large amount of release paper (release film) with a large capacity is generated, which hinders work on site. It becomes a factor of construction efficiency decline. Moreover, the release paper (release film) removed in the above-described form is not only costly as industrial waste, but also causes environmental pollution, whether it is incinerated or simply discarded. The object of the present invention is to eliminate the above-mentioned problems.

The present invention includes an existing vinyl chloride resin waterproof sheet (hereinafter referred to as a PVC sheet) formed on a base and having a first adhesive layer formed on the surface, and a breakage / crush of the existing PVC sheet formed on the existing PVC sheet. It is made of woven fabric, non-woven fabric or elastic resin material with a crushing / fluctuation suppression layer for preventing and suppressing breakage / fluctuation of fragmented pieces, a resin film on one side and a second adhesive layer on the other side. And a cushion mat that acts as a temporary waterproof layer before the new PVC sheet is stretched, and is mechanically fixed on the surface of the cushion mat. A new PVC sheet fixed to a base by a metal fitting, and the crushing / swing suppressing layer includes the first adhesive layer and the second adhesive layer, and the resin of the buffer mat Before printing on the film PVC waterproof structure obtained by forming a fixed position of the fixing bracket, it is intended to solve the conventional problems described above to offer.

In the polyvinyl chloride waterproof structure according to paragraph 0006 above, the first and second adhesive layers are formed of a synthetic rubber adhesive of a nitrile rubber type or a chloroprene rubber type to eliminate stickiness on the surface of the adhesive. May be configured to improve efficiency.

In the polyvinyl chloride waterproof structure according to paragraph 0006 above, the first adhesive layer is formed in a wet state with a polyester or acrylic resin system in an amount of 100 to 600 g / m 2 to provide plasticizer migration resistance. There is.

In the polyvinyl chloride waterproof structure according to any one of the above paragraphs 0006 to 0008, the resin film of the buffer mat may be configured to form a non-slip film surface to improve the safety of construction work.

  Further, in the above PVC sheet waterproof structure, the resin film provided on the surface of the buffer mat may be provided with a non-slip treatment layer to ensure the safety of construction and the temporary waterproof function during the waterproof work.

With the above configuration, the following effects can be obtained in the present invention.
A: Not only breakage and crushing of existing PVC sheets, but also breakage, crushing of broken pieces, and fluctuations even if crushing and crushing, and buffer mats and new PVC sheet breakage due to these Adverse effects can be properly prevented, and slip prevention and temporary waterproofing during waterproofing work can be performed.
B: Since the release mat is not required for the buffer mat, there is no work for removing the release paper (release film) during the construction work, and the construction efficiency is improved.
D: Efficient construction is possible without the generation of release paper (release film) that is undefined and has a large capacity, which has been an obstacle to on-site work.
E: Since there is no removed release paper (release film), the cost of processing as industrial waste becomes unnecessary, and environmental pollution factors associated with processing are eliminated.

  The base of the cushion mat is made of organic natural fibers such as cotton and linen, synthetic fibers such as polyester, vinylon, nylon, aramid, and polypropylene, and inorganic fibers such as glass, and can be formed as a sheet of nonwoven fabric or woven fabric. . Usually, the basis weight (weight per unit area) is 10 to 300 g / square meter. Or it can form with the sheet | seat consisting of elastic bodies, such as a synthetic rubber and a synthetic resin. In order to buffer the fluctuation and fluctuation of broken pieces and crushed pieces and to inhibit the plasticizer migration, it is preferably formed of a nonwoven fabric or woven fabric made of synthetic fibers or inorganic fibers, or an elastic resin material.

A crushing / swing suppression layer is formed between the existing PVC sheet and the buffer mat to prevent breakage / crushing of the existing PVC sheet and to prevent the breakage / crushing piece from swinging. The movement suppressing layer is constituted by a fixing layer formed on the back surface of the buffer mat and an engaging layer formed on the existing PVC sheet and bonded and fixed to the fixing layer. The crushing / swaying suppression layer allows the buffer mat to be pressure-bonded to the surface of the existing PVC sheet to prevent the existing PVC sheet from breaking or crushing, or to fix the smashing of the breaking / crushing pieces that have already occurred. In combination with the action of the resin film described later, damage to the buffer sheet and the new PVC sheet is prevented. In addition, when the buffer mat is in close contact with the existing PVC sheet, there is an effect of preventing rain during the waterproofing work from entering from the tear of the existing PVC sheet, and the temporary waterproofing during the waterproofing work becomes possible.

The fixing layer and the engagement layer are formed of a contact type adhesive using a synthetic rubber adhesive such as nitrile rubber or chloroprene rubber. The fixing layer in the buffer mat is formed during the production of the mat, and the amount of the adhesive applied at that time is preferably 2 to 50 g / m 2 in a dry state in consideration of blocking, firewood and the like. On the other hand, the engagement layer on the base side, that is, the surface of the existing PVC sheet, is applied at the construction site during construction work, and the amount is preferably 50 to 300 g / square meter in a wet state in consideration of adhesive strength and workability. In addition to the synthetic rubber adhesives such as nitrile rubber and chloroprene rubber, the base-side engagement layer may be made of synthetic resin adhesive having plastic resistance such as non-contact type polyester or acrylic. It may be formed of a resin, and the amount at that time is preferably 100 to 600 g / square meter in a wet state.
The application of the engagement layer on the base side can be performed with a commercially available wool roller or the like, and the solution viscosity is preferably in the range of 500 to 5000 cps / 20 ° C.

In addition, when the base material of the buffer sheet is composed of a nonwoven fabric, a resin film is applied to at least one of the front and back surfaces of the nonwoven fabric for reinforcing the strength of the buffer sheet, but the resin film is applied to both surfaces of the nonwoven fabric. If it is configured, the strength is improved. In this case, it is also desirable to use one film having high tear resistance and the other film having high rigidity.
Also, when a film is stuck only on the surface of the substrate, the film may be made of a double tear between a high tear resistance and a high rigidity. Considering all of the above configurations, the thickness is set to 0.01 mm or more and 2 mm or less. In addition, the resin film prevents migration of the plasticizer between existing and new PVC sheets. The resin film on the surface of the buffer mat is provided with a non-slip treatment layer by partial or full ink coating, which not only ensures the safety of construction work, but also pre-prints the fixed position of the disc with the ink. Construction efficiency is also improved.
The resin film is polyester, polyethylene, polypropylene, polystyrene, polyvinyl alcohol, fluororesin, cellulose acetate, saturated polyester (polyethylene terephthalate, etc.), polyamide resin, polyimide, modified polyphenylene ether, polysulfone, polyarylate, polyethersulfone, polyether. Ether ketone, polyether imide, polyphenylene sulfide, methylpentene copolymer, polyparaxylene and the like are used alone or in combination, and the thickness is preferably in the range of 1 to 200 μm.

  The new PVC sheet is fixed to the base by a well-known mechanical fixing method using a disk and an anchor, but the disk is set on the upper surface of the new PVC buffer sheet and anchored to the base. May be fused and fixed by an induction heating method, or may be fixed by welding with a solvent, or the surface of a new PVC sheet may be fixed by a disk and an anchor.

FIG. 1 is a cross-sectional view showing one embodiment of a buffer mat according to the present invention. In the figure, 1 is
This buffer mat 1 was formed on the back surface of a polyester nonwoven fabric 2 having a basis weight of 50 g / square meter as a base, a polyester film 3 having a thickness of 12 μm as a strength maintaining resin film affixed to the surface, and the nonwoven fabric 2. It consists of a fixing layer 4.
The fixing layer 4 is formed of a contact-type chloroprene rubber adhesive, and therefore, the exposed surface is not sticky even if a release paper or the like is not attached, and the buffer mat 1 is manufactured in a roll shape. It can be transported, and this is also easy to handle in construction work, so it greatly contributes to the improvement of construction efficiency. Note that an anti-slip agent is applied to the surface of the polyester film 3 to form an anti-slip film. With such a configuration of the buffer mat 1, if the buffer mat 1 is laid on an existing PVC sheet, temporary waterproofing against rain during the construction can be ensured, and an unexpected sliding accident in the construction can be appropriately prevented.

  FIG. 2 is a cross-sectional view showing a related configuration between the buffer mat 1 and the existing PVC sheet. In the figure, the buffer mat 1 is composed of a non-woven fabric having a polyester film 3 on the front surface and a fixing layer 4 made of a contact type chloroprene rubber adhesive on the back surface as described above. It is pressure-bonded to an existing PVC sheet 7 laid through a buffer sheet 8. An engagement layer 5 is formed on the surface of the existing PVC sheet 7 at the time of waterproof repair work. In this embodiment, the engagement layer 5 is formed by application of a nitrile rubber contact type adhesive, and the buffer mat is formed by pressure-bonding the fixing layer 4 on the back surface of the buffer mat 1 to the engagement layer 5. 1 is stretched on the existing PVC sheet 7, and the crushing / swing suppressing layer 6 is formed by joining the fixing layer 4 and the engaging layer 5. Note that the engagement layer 5 may be formed of an acrylic adhesive or the like having plastic resistance.

  FIG. 3 is a cross-sectional view showing an embodiment of a modified waterproof structure using the buffer mat 1 described above. In the figure, S is a concrete base, and a new PVC sheet 9 is laid on the concrete base S as a waterproof repair work. That is, 8 is an existing buffer sheet in which polyethylene cloth is laminated on foamed polyethylene of an existing waterproof layer, 7 is an existing PVC sheet stretched on the existing buffer sheet 8, and this is an anchor B as a fixing metal fitting and a concrete base It is fixed to S.

A buffer mat 1 having the configuration shown in FIG. 1 is laid on the top surface of the existing PVC sheet 7, and the fixing layer 4 on the back surface of the buffer mat 1 and the engagement layer formed on the existing PVC sheet 7. 5 is pressed to form a crushing / swing suppressing layer 6, whereby the buffer mat 1 is firmly bonded and bonded to the surface of the existing PVC sheet 7. A new PVC sheet 9 is stretched on the surface of the buffer sheet 1.
The new PVC sheet 9 is fixed to the concrete base S with a mounting bracket made of a disk D and an anchor B. The disk D is fixed by an anchor B, and the surface portion is fused to the back surface of the new PVC sheet 9 by an electromagnetic induction heating method.

  FIG. 4 is a cross-sectional view showing a related configuration of the buffer mat 1 and the existing PVC sheet 7 in the waterproof structure shown in FIG. In the figure, the existing PVC sheet 7 has a fracture portion 7a, a crack portion 7b, and a crushing portion 7c. However, the crushing / swing suppressing layer 6 having elasticity is pressure-bonded to these portions, and the sharp corners in the fractured portion 7a and the cracked portion 7b are encased in the crushing / swing suppressing layer 6 to the nonwoven fabric 2. It is cut off, so that the buffer mat 1 is of course prevented from being damaged by the vinyl chloride sheet thereon.

Further, the crushed pieces in the crushing portion 7c also prevent damage to the vinyl chloride sheet as well as the buffer mat 1 by the action of the crushing / swing suppressing layer 6 which is an elastic layer. And since the part in which the fracture | rupture, a crack, and the fracture | rupture have not yet arisen in the existing vinyl chloride sheet 7 is elastically pressed by the elastic material layer, a fracture | rupture etc. do not generate | occur | produce easily. In particular, it is possible to effectively prevent various acting forces during construction work, for example, breakage due to anchor driving of a fixing bracket or the like.

1 is a cross-sectional view showing an embodiment of a buffer mat according to the present invention. It is sectional drawing which shows the related structure of a buffer mat and the existing vinyl chloride sheet. It is sectional drawing which shows one Example of the PVC sheet waterproof structure using the buffer mat which concerns on this invention. It is sectional drawing which shows the related structure of a buffer mat and the existing polyvinyl chloride sheet | seat in the waterproof structure shown in FIG.

1. . . . . 1. Buffer mat . . . . Nonwoven fabric (base of cushion mat)
3. . . . . 3. Resin film . . . . Adhesive layer (contact type adhesive layer)
5. . . . Bonding layer 6. . . . . 6. Crushing / swaying suppression layer . . . . Existing PVC sheet 8. . . . . Existing buffer sheet B. . . . . Anchor D. . . . . Disk S. . . . . Concrete base

Claims (4)

An existing vinyl chloride resin waterproof sheet (hereinafter referred to as a vinyl chloride sheet) formed on the ground surface and having a first adhesive layer formed on the surface thereof, and the existing PVC sheet formed on the existing PVC sheet is prevented from breaking / crushing and It consists of a crushing / swing suppressing layer for suppressing the swinging of the shredded pieces, and a base formed of a woven fabric, a nonwoven fabric or an elastic resin material having a resin film on one side and a second adhesive layer on the other side. A cushioning mat that is laid on the top surface of the crushing / swaying suppression layer and acts as a temporary waterproof layer before the new PVC sheet is stretched, and a mechanical fixing bracket that is laid on the surface of the cushioning mat. The crushing / swing suppressing layer is composed of the first adhesive layer and the second adhesive layer, and is printed on the resin film of the buffer mat. Of the fixing bracket by PVC waterproof structure, characterized in that the formation of the position. 2. The waterproof PVC structure according to claim 1, wherein the first and second adhesive layers are formed of a nitrile rubber-based or chloroprene rubber-based synthetic rubber adhesive to eliminate stickiness on the adhesive surface. PVC waterproof structure characterized by improved efficiency. 2. The polyvinyl chloride waterproofing structure according to claim 1, wherein the first adhesive layer is formed in an amount of 100 to 600 g / square meter in a wet state with a polyester or acrylic resin system to impart plasticizer migration resistance. Characteristic PVC waterproof structure. 4. The waterproof PVC structure according to claim 1, wherein the resin film of the buffer mat is formed with a non-slip surface to improve safety of construction work.

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