JP3008958U - Waterproof sheet for insulation method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a structure that simplifies the construction and facilitates heat fusion between waterproof sheets and solvent welding. [Structure] On the back surface of the vinyl chloride resin sheet 1, the crosslinked plastic foam 2 is an adhesive or pressure sensitive adhesive 3,
Foam is laminated on one edge in the longitudinal direction of the sheet, leaving a welding margin 4 on which the foam is not laminated. [Effect] The plastic foam is not blown away by the wind during construction, and construction time is shortened and construction is improved. Further, the vinyl chloride resin sheet does not come into contact with the base at the joint portion of the waterproof sheet, and the insulating function can be maintained. Moreover, the plastic foam can be easily peeled off from the vinyl chloride resin sheet without remaining, and the waterproof sheets can be joined together or the waterproof sheet and other waterproof members (deaerator, drain, etc.) can be joined by heat fusion or solvent welding. You can easily join.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof sheet used for a waterproofing method on a rooftop of a building, and more particularly to a vinyl chloride resin waterproof sheet for an insulating method in which a waterproof sheet is mechanically fixed to a base without using an adhesive. Is.

[0002]

[Prior art]

 One of the waterproof methods for the rooftop of buildings is an insulation method in which the waterproof sheet is fixed to the base surface of the roof with fasteners such as screws or bolts without using an adhesive. This insulation method generally involves laying a plastic foam on the rooftop surface with or without adhesive or double-sided tape, and then placing a tarpaulin on the plastic foam with fasteners such as screws or bolts. It is mechanically fixed and the sheet waterproofing method is applied. The insulation method is not affected by the moisture on the rooftop, and has the characteristic that it can be installed even if some moisture remains after it rains.

[0003]

[Problems to be solved by the device]

 In the insulation method, a plastic foam is used between the ground surface of the roof and the waterproof sheet.The plastic foam has the function of adjusting unevenness such as unevenness on the roof top and bottom ground, and when the ground surface is asphalt. It plays the role of preventing tar from migrating to tarpaulins. However, in the conventional insulation method, the plastic foam and the waterproof sheet were separately applied to the base surface of the roof, so when the wind was blowing, the plastic foam was blown by the wind, making the construction difficult. Especially when the wind was strong, it was often impossible to construct at all. In addition, since the plastic foam is applied to the ground above and below the roof, and the waterproof sheet is laid on it, the construction requires two steps, which is a troublesome work. The present invention solves these conventional problems and provides a waterproof sheet suitable for an insulation method.

[0004]

[Means for Solving the Problems]

 Means of the present invention taken to solve the above-mentioned problem is to adhere a crosslinked plastic foam to the back surface of a vinyl chloride resin sheet, leaving a welding margin of a predetermined width at one end in the longitudinal direction. The present invention provides a waterproof sheet for an insulation method, which is laminated with an adhesive or an adhesive, and has a peel strength between the laminated vinyl chloride resin sheet and the crosslinked plastic foam of 0.1 to 1. It is 0 (Kg / 3 cm), a woven or non-woven fabric is laminated in the middle of the vinyl chloride resin sheet, and the welding margin width is 30 to 100 mm.

Further, the back surface of a vinyl chloride resin sheet having a woven fabric or a non-woven fabric laminated in the middle is crosslinked by leaving a welding margin having a width of 30 to 100 mm at one end in the longitudinal direction. The formed plastic foam may have a peel strength of 0.1 to 1.0 (Kg / 3 cm) and are laminated with an adhesive or a pressure-sensitive adhesive.

[0006]

[Action]

 By stacking plastic foam on the back side of vinyl chloride resin sheets in advance, the construction of the waterproof sheet is simplified, and by providing a welding margin of a specified width at the end of the waterproof sheet, the thermal fusion between the waterproof sheets can be prevented. Coating and solvent welding have become easier. Furthermore, even if the waterproof sheet is joined at a portion other than the welding area, it can be neatly peeled off from the vinyl chloride resin sheet without leaving the foam at the joined portion. The workability can be improved because it can be heat-sealed and solvent-welded to the member.

[0007]

【Example】

 An example of the implementation of the waterproof sheet A for the insulating and waterproof method of the present invention will be described with reference to the drawings. On the back surface of the vinyl chloride resin sheet 1, the crosslinked plastic foam 2 is an adhesive or an adhesive 3, The foam 1 is laminated on one side edge of the sheet 1 in the longitudinal direction, leaving a welding margin 4 of a predetermined width in which the foam 2 is not laminated.

As the vinyl chloride resin sheet 1 of the present invention, a vinyl chloride resin sheet that is usually used as a waterproof sheet A in this type of technical field may be used. For example, it is a long waterproof sheet having a thickness of 1 to 3 mm and a width of 500 to 2000 mm, and may have a single-layer structure or a multi-layer structure. It is also possible to laminate a woven or non-woven cloth of glass fiber, polyester fiber, nylon fiber or the like on the back surface or the intermediate layer of the vinyl chloride resin sheet 1. In the case of laminating a woven fabric or a non-woven fabric, it is more preferable to laminate it on the intermediate layer rather than the back face of the vinyl chloride resin sheet 1 in terms of the bondability as the waterproof sheet A.

The waterproof sheets A are joined to each other by waterproofing by bonding the surface of one of the waterproof sheets A to the back surface of the vinyl chloride resin sheet 1 of the other adjacent waterproof sheet A by heat fusion or solvent welding. Since the sheets A are integrated with each other, it is possible to more integrally join the woven cloth and the non-woven cloth to the back surface of the vinyl chloride resin sheet 1 if they are not laminated.

The vinyl chloride resin referred to in the present invention is a vinyl chloride resin to which various additives such as a plasticizer, a stabilizer, a filler, an ultraviolet absorber, an antioxidant, a gelation accelerator, and a processing aid are appropriately distributed. In addition to these, vinyl chloride-based copolymer resins such as ethylene-vinyl chloride copolymer resin, vinyl acetate-vinyl chloride copolymer resin, urethane-vinyl chloride copolymer resin, etc. may be used. , A blend of other synthetic resins such as ethylene-vinyl acetate copolymer resin, acrylic resin, urethane resin and polyester resin, and other synthetic rubber such as nitrile rubber and acrylic rubber.

A cross-linked plastic foam 2 is laminated on the back surface of the vinyl chloride resin sheet 1. If the waterproof sheets having a structure in which ordinary plastic foam which is not cross-linked is laminated on the back surface of the vinyl chloride resin sheet 1 are joined by heat fusion, the plastic foam will collapse due to heat. , The problem that the joint part of the waterproof sheet is dented occurs. The insulating function of the foam is lost in the recessed part, the vinyl chloride resin sheet 1 contacts the base, and the base is directly damaged, and if the base is asphalt, tar chloride is generated. There is a problem that the sheet is transferred to a vinyl resin sheet. Therefore, in the present invention, the heat-resistant cross-linked plastic foam 2 is used.

As the cross-linked plastic foam 2, those obtained by cross-linking and foaming a synthetic resin such as polyethylene resin, polypropylene resin, urethane resin, or those after foaming and cross-linking can be preferably used. The plastic foam preferably has a thickness of about 1 to 5 mm. If it is thinner than 1 mm, it will be directly affected by the unevenness of the base, and if tar of asphalt is transferred to a vinyl chloride resin sheet, the insulation function will be poor. If it is thicker than 5 mm, it will be hard and long because the plastic foam is crosslinked. It is not preferable because it cannot be rolled up or has a curling tendency.

The crosslinked plastic foam 2 and the vinyl chloride resin sheet 1 are laminated via an adhesive or a pressure sensitive adhesive 3. The laminating method is not particularly limited, and various methods such as a normal dry lamination method, a wet laminating method, a semi-wet laminating method or a hot melt laminating method can be used.

As the adhesive or pressure-sensitive adhesive 3 for laminating the vinyl chloride resin sheet 1 and the plastic foam 2 of the present invention, the vinyl chloride resin sheet 1 and the plastic foam 2 are bonded to some extent. There is no particular limitation as long as it is a synthetic resin adhesive (including a pressure-sensitive adhesive) such as urethane adhesive, polyester adhesive, ethylene-vinyl acetate adhesive, acrylic adhesive, etc., nitrile rubber. And other rubber-based adhesives (including adhesives).

When the waterproof sheet A of the present invention is applied to the roof surface B of the roof, a welding margin 4 having a predetermined width is provided on one of the left and right ends of the vinyl chloride resin sheet 1 in the longitudinal direction. As a result, adjacent waterproof sheets A can be integrally joined to each other, but apart from this, various dewatering devices such as a deaeration device for removing water from the substrate and a drain for draining water, etc. When joining the sheet with the waterproof sheet A, or when joining the ends of the sheet A in the unwinding direction and the winding direction of the waterproof sheet A, the plastic foam 2 is peeled from the vinyl chloride resin sheet 1. Need to be joined together.

When joining various waterproof members such as a deaerator and a drain to the waterproof sheet A, it is preferable to peel off and join the plastic foam 2 on the back surface of the vinyl chloride resin sheet 1, which is the deaerator. When attaching various waterproof members such as drains and drains to the waterproof sheet A, cut the waterproof sheet A into almost the same size as or larger than the waterproof member, and cut the edge of the cut waterproof sheet A and the waterproof member. Since they are joined, if the plastic foam 2 is laminated on the back surface of the waterproof sheet A at this time, water is transmitted to the inside of the foam and the watertightness is not maintained. For example, as one of the methods for joining the waterproof sheet A to the drain, the waterproof sheet is put on the drain, cut to the size of the drain, and attached to the drain with an adhesive, and mechanically using a sheet retainer made of a metal frame. The edge of the waterproof sheet cut out by pressing is fixed to the drain, but if there is plastic foam 2 in that part, it will not be easy to bond to the drain, and water will penetrate inside the foam and enter the rooftop base surface. There is a problem that a water leakage accident occurs. The drain is fixed to the ground beforehand, and the back side of the tarpaulin must be joined.

Further, even if the waterproof member is previously joined with another waterproof sheet that is slightly larger than the waterproof member, and the waterproof sheet is covered on the waterproof member to join the waterproof sheets to each other, if the foam is formed on the back surface, heat will not melt. Adhesion and solvent welding become difficult, and the plastic foam 2 must be peeled off and joined. When such a waterproofing method is performed, it is preferable to bond with an adhesive or a pressure-sensitive adhesive 3 so as to improve the peel-up property (peelability).

The peel-up property is preferably such that the debris of the foam 2 does not remain on the vinyl chloride resin sheet 1 when the plastic foam 2 is peeled off from the vinyl chloride resin sheet 1. In order to have such peel-up property, the peel strength is 0. Adhesive lamination is preferable in the range of 1 to 1.0 (Kg / 3 cm). If it is less than 0.1 (Kg / 3 cm), the strength is insufficient and peels off before applying the waterproof sheet when winding or transporting the waterproof sheet A, which is not preferable, and 1.0 (Kg / 3 cm). If it is larger than this value, the plastic foam 2 is broken when the plastic foam 2 is peeled off from the vinyl chloride resin sheet 1, and a part of the foam 2 remains on the sheet 1, which is not preferable.

As a method for imparting such peel strength, for example, the amount of the coating solid component of the adhesive or the pressure-sensitive adhesive is adjusted, or a method in which the adhesive strength of the adhesive or the pressure-sensitive adhesive is not too high is selected and used. There is a method of lowering the pressure for lamination, or a method of lowering the heating temperature.

According to the present invention, a welding margin 4 having a predetermined width in which the plastic foam 2 is not laminated is provided on one of the left and right ends of the vinyl chloride resin sheet 1 in the longitudinal direction. The width of the welding margin 4 is preferably 30 to 100 mm. If it is less than 30 mm, it is difficult to bond the waterproof sheets A to each other, and if it is more than 100 mm, the area to be heat-sealed or solvent-welded increases, and it takes time and effort for bonding, which is not practical. More preferably, the overlapping width is about 40 to 60 mm.

The waterproof sheets A are joined to each other by stacking the welding margin 4 on the vinyl chloride resin sheet 1 at the end portion of the adjacent waterproof sheet A where the welding margin 4 is not present, and by welding the welding margin 4 with vinyl chloride. This is to bond the resin sheet 1 and the vinyl chloride resin sheet 1 on the surface of the waterproof sheet A by heat fusion or solvent welding.

The term “heat fusion” used in the present invention means that heat such as hot air is applied to the front surface or the back surface of the vinyl chloride resin sheet 1 to melt or soften the sheet 1 and the sheet 1 It means joining and integrating, and solvent welding means applying a solvent to the front surface or the back surface of the vinyl chloride resin sheet 1 to dissolve the sheet 1 and joining and integrating.

In the present invention, since the waterproof sheet A is a vinyl chloride resin, it can be heat-sealed or solvent-welded, and the waterproof sheets A can be extremely strongly integrated and joined together. When joining by solvent welding, it is preferable to use a solvent mainly composed of tetrahydrofuran, which has good solubility in vinyl chloride resin.

The waterproof sheet A for the insulation method of the present invention is constructed as described above, and one example of a method of manufacturing the same will be described below. A vinyl chloride resin having a degree of polymerization of 1000 is appropriately blended with a plasticizer, a stabilizer and a filler to form a sheet by calendering, and a woven cloth made of glass fiber is laminated on the intermediate layer to have a thickness of 1.5 mm. A sheet 1 made of a long soft vinyl chloride resin having a width of 1300 mm was produced.

Next, a cross-linked polyethylene foam 2 having a thickness of 2 mm, a width of 1200 mm and a foaming ratio of 30 times, and the soft vinyl chloride resin sheet 1 are dry-laminated via a nitrile rubber adhesive 3. Laminated. After stacking, one edge in the longitudinal direction is cut so that the sheet 1 and the foam 2 have the same end, and the other end is a sheet of 50 mm in which the sheet 1 and the foam 2 are not stacked. Sheet 1 was cut so that 4 remained.

The cut waterproof sheet A had a width of 1200 mm and a total thickness of 3.5 mm, and was wound into a long shape. The peel strength between the soft vinyl chloride resin sheet 1 and the polyethylene foam 2 was measured by a tensile tester and found to be 0.6 (Kg / 3 cm), and no form 2 remained and the vinyl chloride resin sheet 1 Peeled off more.

Next, a joint test between the waterproof sheets A was conducted. The two waterproof sheets A are welded to each other by abutting the side edge portion with the welding margin 4 and the side edge portion without the welding margin 4 and adhering the welding margin 4 (soft vinyl chloride resin sheet 1) to the adjacent side edge without the welding margin 4. Part of the waterproof vinyl sheet A (soft vinyl chloride resin sheet 1), and the hot air-type heat-sealing machine is used to weld hot air to the filter 4 to melt the soft vinyl chloride resin sheet 1 of both waterproof sheets A. Let them join together. It was possible to integrally join the ends of the waterproof sheet A (the soft vinyl chloride resin sheets 1) together without sagging the polyethylene foam 2 under the ends of the waterproof sheet A to which hot air was applied.

[0028]

[Effect of device]

 The waterproof sheet according to the present invention has a structure in which the plastic foam sheet and the crosslinked plastic foam are laminated so that the plastic foam will not be blown away by the wind during construction as in the past and there is wind. However, since it is now possible to apply it, and since it is no longer necessary to apply the foam and the waterproof sheet separately, the workability is greatly improved, such as shortening the work time. In addition, by providing a welding margin of a predetermined width at one end in the longitudinal direction of the vinyl chloride resin sheet, it is possible to heat or waterproof the waterproof sheets, that is, the vinyl chloride resin sheets, to each other. Easy integration and improved workability.

Further, when the waterproof sheets are integrally joined by heat fusion by laminating the crosslinked plastic foam, the plastic foam does not collapse due to hot air. The resin sheet can maintain the insulation function without touching the underlying surface. Moreover, since the peel strength between the vinyl chloride resin sheet and the plastic foam is 0.1 to 1.0 (Kg / cm), the vinyl chloride resin sheet can easily and without leaving a plastic foam, if necessary. Can be peeled off. Therefore, when joining water-proof sheets or joining a waterproof sheet and various waterproof members (deaerator, drain, etc.) in the area where there is no welding margin, the foam at the joining section should be made of vinyl chloride resin sheet. It is possible to peel it off, and only the vinyl chloride resin sheet can be exposed and easily joined by heat fusion or solvent welding.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the waterproof sheet of the present invention.

FIG. 2 is a schematic view showing a state where the waterproof sheet of the present invention is installed on the rooftop.

[Explanation of symbols]

Reference numeral 1 is a vinyl chloride resin sheet, 2 is a plastic foam, 3 is an adhesive or pressure-sensitive adhesive, and 4 is a welding margin.

Claims (5)

[Scope of utility model registration request] 1. A back surface of a vinyl chloride resin sheet,
A waterproof sheet for an insulation method, comprising: a cross-linked plastic foam laminated with an adhesive or a pressure-sensitive adhesive on an edge portion on one side in a longitudinal direction, leaving a welding margin having a predetermined width. 2. The peel strength between the laminated vinyl chloride resin sheet and the crosslinked plastic foam is 0.
It is 1-1.0 (Kg / 3cm), The waterproof sheet for insulation methods of Claim 1 characterized by the above-mentioned. 3. The waterproof sheet for an insulation method according to claim 1, wherein a woven cloth or a non-woven cloth is laminated in the middle of the vinyl chloride resin sheet. 4. The waterproof sheet for an insulation method according to claim 1, wherein the width of the welding margin is 30 to 100 mm. 5. A plastic cross-linked with a welding margin having a width of 30 to 100 mm left on one end in the longitudinal direction on the back surface of a vinyl chloride resin sheet having a woven or non-woven fabric laminated in the middle. The foam has a peel strength of 0.1
A waterproof sheet for an insulation method, which is laminated with an adhesive or a pressure-sensitive adhesive at 1.0 (Kg / 3 cm).