JP2016069804A - Solvent carrier sheet, sheet waterproofing structure, and adhesion method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solvent carrier sheet capable of supplying a soluble solvent uniformly to a connected portion between first and second resin layers overlapped in a thickness direction of a sheet waterproofing structure for waterproofing a building frame, and firmly connecting the connected portion, when fusing the resin layers using the soluble solvent, along with the sheet waterproofing structure installed using the solvent carrier sheet, and an adhesion method applied to installation of the sheet waterproofing structure that uses the solvent carrier sheet.SOLUTION: A solvent carrier sheet 80 is used in an adhesion method in which a waterproof sheet (first resin layer) 20 and a resin layer (second resin layer) 62 of a sheet waterproofing structure 10 are fused using a soluble solvent at a connected portion 64. The solvent carrier sheet includes a fiber assembly containing a first and second fibers, and is disposed between the waterproof sheet 20 and the resin layer 62 at the connected portion 64 with the fiber assembly carrying the soluble solvent. When the fiber assembly is pressed, the soluble solvent seeps out therebetween.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a solvent-carrying sheet used when constructing a waterproof sheet structure for waterproofing a casing, a sheet waterproof structure using the solvent-carrying sheet, and a welding method used during construction of the sheet waterproof structure About.

  In recent years, with the demand for higher durability of buildings, a waterproof sheet structure in which a waterproof sheet (resin sheet) is laid and used has been adopted on many rooftops and verandas of buildings (for example, Patent Document 1). reference.).

  In this sheet waterproof structure, for example, at least a part of the floor portion is covered with a waterproof sheet, but the waterproof sheet is fixed to the floor portion (frame) with a plurality of disk-shaped fixing disks (steel plates). Is fixed to the floor with a fixed screw, etc. at a predetermined interval, and the fixed disk is fixed by joining the resin sheet (laminate sheet) provided on the upper surface of the fixed disk and the lower surface of the waterproof sheet. This is performed by joining the floor portion and the waterproof sheet via the disk. Thereby, while waterproofing with respect to rain water etc. is given to a housing, a waterproof sheet is fixed to a housing without peeling off with respect to a wind.

  In the sheet waterproof structure having such a configuration, the resin sheet and the waterproof sheet are joined by, for example, supplying a soluble solvent between the resin sheet and the waterproof sheet at a joint portion where they are overlapped with each other. It is carried out by using a welding method for melting and joining.

  In this case, in order to firmly join the waterproof sheet and the resin sheet at the joining portion, it is necessary to supply the soluble solvent uniformly between the resin sheet and the waterproof sheet. However, simply supplying a soluble solvent between them using a supply means such as a syringe or a brush cannot uniformly supply a soluble solvent to a position corresponding to the edge of the resin sheet. In addition, the waterproof sheet (first resin layer) and the resin sheet (second resin layer) could not be firmly bonded to each other at the bonding portion where they overlap each other.

  Furthermore, in the sheet waterproof structure with such a configuration, the waterproof sheet is covered by covering a plurality of waterproof sheets in a state where these edges overlap each other, and the waterproof sheets are bonded to each other at a bonding portion where the edges overlap. Although it is ensured, the same problem as the bonding between the waterproof sheet and the resin sheet occurs in the bonding between the waterproof sheets (first and second resin layers) at the bonded portion.

JP 2013-53517 A

  It is an object of the present invention to melt and bond a first resin layer and a second resin layer using a soluble solvent at a bonding site generated by overlapping the first resin layer and the second resin layer in the thickness direction in a waterproof sheet structure for waterproofing a casing. In this case, the solvent-carrying sheet that can uniformly supply the soluble solvent to the joining site and can be firmly joined, the sheet waterproof structure constructed by using the solvent-carrying sheet, and the solvent-carrying sheet Another object of the present invention is to provide a welding method applied to construction of a waterproof sheet structure using a sheet for use.

Such an object is achieved by the present invention described in the following (1) to (13).
(1) In a waterproof sheet structure for waterproofing a casing, a first resin layer and a second resin layer, each containing a resin material, are melted using a soluble solvent at a joining portion generated by overlapping in the thickness direction. Used for the welding method
A fiber assembly containing a first fiber and a second fiber each having a different degree of melting with respect to the soluble solvent, and in the state where the soluble solvent is supported on the fiber assembly, The soluble solvent can be leached between the first resin layer and the second resin layer when disposed between the first resin layer and the second resin layer and applying a pressing force to the fiber assembly. A solvent-carrying sheet characterized by being configured as described above.

  (2) The solvent-carrying sheet according to (1), wherein the resin material contains a vinyl chloride resin.

  (3) The solvent-supporting sheet according to (1) or (2), wherein the soluble solvent contains tetrahydrofuran.

  (4) The solvent-carrying sheet according to any one of (1) to (3), wherein the first fiber has a higher degree of melting with respect to the soluble solvent than that of the second fiber with respect to the soluble solvent.

  (5) The solvent-carrying sheet according to (4), wherein the first fiber and the second fiber are both resin fibers.

  (6) The solvent-carrying sheet according to (5), wherein the first fiber contains a vinyl chloride resin.

  (7) The solvent-carrying sheet according to (5) or (6), wherein the second fiber contains a polyamide-based resin.

  (8) The solvent carrying sheet according to any one of (1) to (7), wherein the thickness of the solvent carrying sheet is 0.1 mm or more and 2 mm or less.

(9) The solvent according to any one of (1) to (8), wherein the solvent-carrying sheet has a loading amount of the soluble solvent of 0.00015 mL / mm ² or more and 0.0006 mL / mm ² or less. Support sheet.

  (10) In the sheet waterproof structure, the first resin layer and the second resin layer are respectively a first waterproof sheet and a second waterproof sheet that cover at least a part of a floor portion of the casing. ) To (9) The solvent carrying sheet according to any one of the above.

(11) In the sheet waterproof structure, the first resin layer is a waterproof sheet that covers at least a part of a floor portion of the casing,
The second resin layer is a resin sheet that is interposed between the waterproof sheet and the floor portion, and a fixing disk with a resin sheet used for fixing the waterproof sheet to the floor portion is provided on the upper surface thereof. The solvent-supporting sheet according to any one of (1) to (9).

(12) A sheet waterproof structure for waterproofing the housing,
A first resin layer and a second resin layer each containing a resin material;
In the joint portion where the first resin layer and the second resin layer are overlapped and joined in the thickness direction, the first resin layer and the second resin layer are sandwiched between the first resin layer and the second resin layer, and are mutually attached to the soluble solvent. A waterproof sheet structure comprising: a fiber assembly containing first fibers and second fibers having different melting degrees, and a solvent-carrying sheet capable of supporting a soluble solvent on the fiber assembly.

(13) In the sheet waterproof structure for waterproofing the casing, the first resin layer and the second resin layer each containing a resin material are melted using a soluble solvent at a joining site formed by overlapping these thickness directions. Welding method,
In the state in which the solvent-supporting sheet including the fiber assembly containing the first fiber and the second fiber having different melting degrees with respect to the soluble solvent is supported in the state where the soluble solvent is supported on the fiber assembly. A first step of disposing the first resin layer and the second resin layer at a site;
By applying a pressing force to the fiber assembly and leaching the soluble solvent between the first resin layer and the second resin layer from the solvent-carrying sheet, the first resin layer and the second resin And a second step of melting and joining the layers.

  According to the welding method using the solvent-carrying sheet of the present invention (welding method of the present invention), in the waterproof structure for waterproofing the casing, the first resin layer and the second resin layer are interposed with the solvent-carrying sheet. In this state, the soluble resin is removed from the solvent-carrying sheet carrying the soluble solvent when the molten part is joined by melting with the soluble solvent at the joining site generated in the thickness direction. It can supply uniformly by making it leached with respect to the junction part between a layer and the 2nd resin layer.

  In addition, since the solvent-carrying sheet includes a fiber assembly containing the first fiber and the second fiber having different melting degrees with respect to the soluble solvent, the solvent-carrying sheet itself is also moderately soluble in the soluble solvent. Thus, the first resin layer and the second resin layer can be firmly bonded to each other through the solvent carrying sheet at the bonding site.

  Therefore, the sheet waterproof structure (sheet waterproof structure of the present invention) constructed by applying such a welding method is such that the first resin layer and the second resin layer are bonded with excellent strength at the bonding site. Become.

It is a perspective view which shows 1st Embodiment of the sheet | seat for solvent holding | maintenance of this invention. It is a longitudinal cross-sectional view in the position corresponding to the fixed disk with a resin layer in the sheet | seat waterproof structure of this invention constructed in the housing. It is a perspective view which shows 2nd Embodiment of the sheet | seat for solvent holding | maintenance of this invention. It is a longitudinal cross-sectional view in the position where two waterproof sheets overlap in the sheet | seat waterproof structure of this invention constructed in the housing. It is a perspective view which shows 3rd Embodiment of the sheet | seat for solvent holding | maintenance of this invention. It is a longitudinal cross-sectional view which shows the state beaten by the wind in the position corresponding to the fixed disk with a resin layer in the sheet | seat waterproof structure of this invention constructed in the housing. It is the fragmentary perspective view which took out the conventional sheet | seat waterproof structure constructed in the housing partially. FIG. 8 is a longitudinal sectional view taken along line AA of the waterproof sheet structure shown in FIG. 7.

  Hereinafter, the solvent carrying sheet, the sheet waterproof structure and the welding method of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

  In the following, an example of a conventional waterproof sheet structure 500 will be described prior to describing the solvent-carrying sheet, the waterproof sheet structure, and the welding method of the present invention.

<Sheet waterproof structure>
7 is a partial perspective view in which a conventional sheet waterproof structure applied to a housing is partially taken out, and FIG. 8 is a vertical sectional view taken along line AA of the sheet waterproof structure shown in FIG. In the following description, the upper side in FIGS. 7 and 8 is referred to as “upper” and the lower side is referred to as “lower”. Moreover, in FIG. 7, the floor part and wall part with which a housing is provided are partially illustrated, without showing the whole sheet | seat waterproof structure for convenience of explanation.

  In the present embodiment, a case (structure) 100 such as a rooftop or a veranda on which the waterproof sheet structure 500 is constructed will be described as an example.

  The casing 100 includes a floor portion 101 and a wall portion 102 provided so as to stand in the z direction so as to surround the outer edge of the floor portion 101.

  The waterproof sheet structure 500 is applied to the casing 100, that is, the wall 102 forming the frame and the floor 101 constituting the bottom, and includes the waterproof sheet 20, the arrangement member 50, and the resin layer. A fixed disk 60 and a fixing screw 70 are provided.

  The arrangement member 50 is arranged at the boundary portion 103 between the floor portion 101 and the wall portion 102, and the plurality of fixed disks 60 with a resin layer are fixed to the floor portion 101 with fixing screws 70 at predetermined (constant) intervals. In this state, the waterproof sheet 20 covers the floor portion 101 and the wall portion 102 together with the disposing member 50, the fixing disk 60 with the resin layer, and the fixing screw 70. Is secured.

  That is, the waterproof sheet 20 is exposed to sunlight and rainwater, and the casing 100 is prevented from being directly exposed to sunlight and rainwater, so that the waterproofness of the casing 100 is ensured. Further, the upper surface of the fixed disk 60 with the resin layer and the lower surface of the waterproof sheet 20 are joined, and thereby, the floor portion 101 and the waterproof sheet 20 are joined via the fixed disk 60 with the resin layer. The waterproof sheet 20 is fixed to the housing 100 without being peeled off by wind or the like.

  A plurality (12 in this embodiment) of fixed disks with resin layers (fixed disks with laminate sheets) 60 are fixed to the floor 101 with fixed screws 70 at predetermined (fixed) intervals, as described above. In this state, the upper surface of the fixed disk 60 with a resin layer and the lower surface of the waterproof sheet 20 are joined. Thereby, the floor part 101 and the waterproof sheet 20 are joined via the fixed disk 60 with a resin layer. As a result, the waterproof sheet 20 is not peeled off by wind or the like on the housing 100 (floor part 101). Fixed.

  The fixed disk 60 with a resin layer is composed of a fixed disk 61 and a resin layer (resin sheet) 62 made of a resin that covers the surface of the fixed disk 61, and the overall shape is a disk shape, and its center It has a through hole 63 that penetrates in the thickness direction.

  A fixing screw 70 is inserted into the through-hole 63 with the fixed disk 61 facing the floor 101, and a screw head included in the fixing screw 70 is fitted into a countersink included in the fixed disk 60 with a resin layer. The fixing screw 70 is screwed and fixed to the floor portion 101, whereby the fixing disk 60 with a resin layer is fixed to the floor portion 101.

  Further, as described above, the fixed disk 60 with the resin layer includes the fixed disk 61 having the through holes 63 and the resin layer (laminate sheet) 62 that covers the surface of the fixed disk 61. Thus, by covering the surface of the fixed disk 61 with the resin layer 62, corrosion of the fixed disk 61 can be surely prevented. Further, the resin layer 62 allows the upper surface of the fixed disk 60 with a resin layer to be prevented. The waterproof sheet 20 is joined to the lower surface.

  The fixed disk (metal plate) 61 has a perfect circle shape in plan view, and its longitudinal cross-sectional shape is a rectangular shape. That is, the entire shape having a constant thickness from the center side toward the edge side forms a disk shape. Moreover, it has the through-hole 63 penetrated in the thickness direction in the center part.

  The resin layer 62 is a coating layer containing a resin material, covers the surface (upper surface) of the fixed disk 61, and is bonded to the lower surface of the waterproof sheet 20 on the upper surface.

  The arrangement | positioning member 50 is arrange | positioned in the boundary part 103 vicinity of the floor part 101 and the wall part 102 as above-mentioned.

  The arrangement member 50 includes a metal plate and a resin layer made of a resin covering the surface of the metal plate, and has a bottom portion 51 and a rising surface 52 each having a rectangular shape as a whole.

  The bottom 51 and the rising surface 52 are positioned so as to correspond to the floor 101 and the wall 102 when arranged at the boundary 103, respectively. In this embodiment, the arrangement member 50 having such a configuration is provided. One is arranged along the boundary 103.

  In the present embodiment, one arrangement member 50 is arranged at the boundary portion 103. However, since the shape of the casing 100 to be waterproofed is naturally various, as the arrangement member 50, A plurality of types of shapes are prepared in advance, and a plurality of shapes that match the shape of the boundary portion 103 included in the case 100 to be actually constructed are selected. And these arrangement | positioning members 50 are arranged in the said boundary part 103 so that it may correspond to the shape.

  Moreover, the arrangement | positioning member 50 is comprised by the metal plate and the resin layer which coat | covers the surface of this metal plate. Thus, by covering the surface of the metal plate with the resin layer, corrosion of the metal plate can be reliably prevented.

  The waterproof sheet 20 is composed of a resin sheet containing a resin material, and covers the floor portion 101 and the wall portion 102 together with the arrangement member 50, the fixing disk 60 with a resin layer, and the fixing screw 70.

  As shown in FIG. 7, the waterproof sheet 20 is a sheet material (plate material) having a long shape (strip shape). In the present embodiment, the two waterproof sheets 20 arranged side by side in the y direction are: The floor 101 and the wall 102 are covered along the x direction. And the two waterproof sheets 20 form the junction part 25 which mutually overlaps in the edge part 22 in ay direction, and two waterproof sheets 20 are joined by this junction part 25. FIG.

  Thereby, the waterproof sheet 20 is exposed to sunlight and rainwater, and the casing 100 is prevented from being directly exposed to sunlight and rainwater, so that the waterproofness of the casing 100 is ensured.

  The sheet waterproof structure 500 having the above-described configuration is constructed by, for example, a sheet waterproof structure construction method described below.

<Construction method for waterproof sheet structure>
In the construction method of the waterproof sheet structure described in the present embodiment, the resin layer-attached fixing disk 60 and the arrangement member 50 are arranged in a predetermined position of the housing 100, and the resin layer is placed on the floor portion 101 with the fixing screws 70. A fixing step of fixing the fixed disk 60 with a cover, and covering the floor portion 101 with a plurality of (two in this embodiment) waterproof sheets 20 together with the fixed disk 60 with a resin layer, and adjoining waterproof sheets 20 to each other. 22 and a fixing step of fixing the waterproof sheet 20 to the resin layer 62.

Hereinafter, these steps will be described in detail.
[1] First, in the casing 100 on which the sheet waterproof structure 500 is to be constructed, the fixing disk with a resin layer (fixing disk with a laminate sheet) 60 and the arrangement member 50 are arranged at predetermined positions of the casing 100 (arrangement step). .

  That is, the arrangement member 50 is arranged at the boundary portion 103 between the floor portion 101 and the wall portion 102, and a plurality (12 in this embodiment) of the fixed disks 60 with a resin layer are arranged at a predetermined (constant) interval (pitch). ) Is opened and placed on the upper surface of the floor 101.

  In addition, the fixed disk 60 with a resin layer is prepared by coating the surface (upper surface) of the fixed disk 61 with a resin layer 62 in advance. Further, the coating of the resin layer 62 on the surface of the fixed disk 61, that is, the bonding of the resin layer 62 and the fixed disk 61 is, for example, an adhesion method in which bonding is performed using an adhesive, a welding method and a heat fusion method described later. Etc. are used.

  In addition, the resin layer fixed disk 60 prepared by using an adhesive method is obtained by bonding the resin layer 62 and the fixed disk 61 via an adhesive (adhesive layer), and using a welding method and a heat sealing method. In the prepared fixed disk 60 with a resin layer, the resin layer 62 and the fixed disk 61 are joined without using an adhesive, and the fixed disk 60 with a resin layer is any of these. Also good.

  [2] Next, each fixing disk 60 with a resin layer is fixed to the floor portion 101 using a fixing screw 70 (fixing step).

  More specifically, the fixing screws 70 are inserted into the through holes 63 of the fixing disks 60 with resin layers, and the screw heads included in the fixing screws 70 are fitted into the counterbore portions included in the fixing disks 60 with resin layers. In this state, the fixing screw 70 is twisted and fixed to the floor 101. Thereby, the fixed disk 60 with the resin layer is fixed to the floor portion 101 with the fixing screw 70.

  [3] Next, the surface of the floor portion 101 and the wall portion 102 together with the arrangement member 50, the fixing disk 60 with the resin layer, and the fixing screw 70 is covered with a plurality of (two in this embodiment) waterproof sheets 20, And while adjoining waterproof sheet 20 mutually, waterproof sheet 20 is fixed to fixed disk 60 with a resin layer (adhesion process).

  In addition, joining of the waterproof sheets 20 is performed by joining the two waterproof sheets 20 at the joining portion 25 where the two waterproof sheets 20 overlap each other at the edge 22 in the y direction of the long waterproof sheet 20.

  Further, the waterproof sheet 20 is fixed to the fixed disk 60 with the resin layer by bonding at a bonding portion 64 where the resin layer 62 positioned on the upper surface of the fixed disk 60 with the resin layer and the lower surface of the waterproof sheet 20 overlap. It has been broken.

  As a result, the adjacent waterproof sheets 20 are joined together, and the waterproof sheet 20 is joined to the floor portion 101 via the fixed disk 60 with a resin layer. As a result, the waterproof sheet 20 is attached to the housing 100 (floor portion 101). Fixed.

  Here, the joining of the two waterproof sheets 20 and the joining of the fixed disk 60 with resin layer and the waterproof sheet 20 are usually performed by I) melting each member (resin layer) to be joined with a solvent. This is performed by using a welding method, which will be described below.

  Hereinafter, a case where the fixing disk 60 with a resin layer and the waterproof sheet 20 are joined by using a welding method will be described as an example.

I) Welding method When the fixing disk 60 with a resin layer and the waterproof sheet 20 are joined using the welding method, in this welding method, the resin layer included in the fixing disk 60 with a resin layer is provided before the waterproof sheet 20 is laid. Examples include a brush welding method in which 62 is in a molten state and an injection welding method in which the resin layer 62 is in a molten state after the waterproof sheet 20 is laid.

(I-1) Brush Welding Method In this brush welding method, first, before laying the waterproof sheet 20 on the surfaces of the floor portion 101 and the wall portion 102, the upper surface of the fixed disk 60 with a resin layer, that is, the resin layer A solvent (soluble solvent) is applied (supplied) to the upper surface of the (laminate sheet) 62 using a brush brush or the like. As a result, the upper surface of the resin layer 62 comes into contact with the solvent, and as a result, is brought into a molten state. Examples of the solvent include, but are not limited to, ketones such as tetrahydrofuran (THF), nitrobenzene, carbon tetrachloride, pyridine, ethyl acetate, cyclohexanone, and methyl ethyl ketone (MEK), and alcohols such as toluene, methyl alcohol, and isopropyl alcohol. Among them, tetrahydrofuran is preferable. Tetrahydrofuran is preferable as a solvent used in the welding method because it is excellent in volatility and exhibits solubility (meltability) in various resin materials contained in the waterproof sheet 20 and the resin layer 62.

  Next, the waterproof sheet 20 is laid on the surfaces of the floor portion 101 and the wall portion 102. At this time, the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 overlap each other at the joint portion 64 where the resin layer 62 and the waterproof sheet 20 overlap, whereby the lower surface of the waterproof sheet 20 is applied to the upper surface of the resin layer 62. Since it comes into contact with the solvent, it is brought into a molten state.

  Next, the bottom surface of the waterproof sheet 20 and the upper surface of the resin layer 62 that are in a molten state are joined to each other by pressing the fixed disk 60 with a resin layer from above the waterproof sheet 20 with the hand of an operator or the like. As a result, the lower surface of the waterproof sheet 20 is fixed to the upper surface of the resin layer 62. Thereby, the waterproof sheet 20 is joined to the floor portion 101 via the fixed disk 60 with a resin layer.

(I-2) Injection welding method In this injection welding method, first, the waterproof sheet 20 is laid on the surfaces of the floor portion 101 and the wall portion 102.

  Next, at the joint portion 64 where the resin layer 62 and the waterproof sheet 20 overlap, using a syringe between the upper surface of the fixed disk 60 with a resin layer, that is, between the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20, A solvent such as tetrahydrofuran (THF) is selectively supplied with the injection needle of the syringe penetrating the waterproof sheet 20. Thereby, the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 come into contact with the solvent, and as a result, both of these are brought into a molten state.

  Next, after removing the injection needle from the waterproof sheet 20, the bottom surface of the waterproof sheet 20 in a molten state is pressed by pressing the fixing disk 60 with a resin layer from above the waterproof sheet 20 by an operator's hand or the like. Are bonded to the upper surface of the resin layer 62, and as a result, the lower surface of the waterproof sheet 20 is fixed to the upper surface of the resin layer 62. Thereby, the waterproof sheet 20 is joined to the floor portion 101 via the fixed disk 60 with a resin layer.

The joining of the two waterproof sheets 20 at the joining portion 25 using the welding method (brush welding method, injection welding method) is performed with the resin layer in the joining of the fixing disk 60 with the resin layer and the waterproof sheet 20 described above. It can be performed by using the waterproof sheet 20 instead of the fixed disk 60.
The sheet waterproof structure 500 is applied to the housing 100 through the above-described steps.

  Now, in the sheet waterproof structure 500 applied to the casing 100 using such a welding method, in order to exhibit the excellent waterproof property of the sheet waterproof structure 500, the waterproof disk and the fixed disk 60 with a resin layer are waterproofed at the joint portion 64. The sheet 20 needs to be firmly joined, and the waterproof sheets 20 need to be joined firmly at the joint portion 25. Therefore, in joining the fixed disk 60 with the resin layer and the waterproof sheet 20, it is required that the solvent is uniformly supplied between the resin layer 62 and the waterproof sheet 20 at the joint portion 64, and further waterproof. In the joining of the sheets 20, it is required that the solvent is uniformly supplied between the waterproof sheets 20 at the joining portion 25 without unevenness.

However, in the brush welding method, a solvent is applied to the upper surface of the resin layer 62 or the waterproof sheet 20 using a brush brush or the like, so depending on the skill level and wrinkle of the worker and the amount of the solvent impregnated in the brush brush, Uneven coating occurs and it is difficult to supply the solvent uniformly. Further, in the injection welding method, the waterproof sheet 20 located on the upper side (opposite side of the floor portion 101) is inserted between the waterproof sheet 20 and the resin layer 62 or the waterproof sheet 20 with the injection needle provided in the syringe being penetrated. Inject solvent between them. For this reason, it is extremely difficult to supply the solvent uniformly even over the edge of the bonding portion 64 or the bonding portion 25 even if the worker is highly skilled. As a result, there arises a problem that the fixing disk 60 with the resin layer and the waterproof sheet 20 cannot be firmly bonded to each other at the bonding portion 64 and the waterproof sheets 20 can not be firmly bonded to each other at the bonding portion 25.
The solvent-carrying sheet of the present invention is used to eliminate such problems.

<Solvent carrying sheet>
Hereinafter, the solvent carrying sheet of the present invention will be described in detail.

<< First Embodiment >>
First, a first embodiment of the solvent-carrying sheet of the present invention applied to the joining of the fixing disk 60 with a resin layer (resin layer 62) and the waterproof sheet 20 at the joining portion 64 will be described.

  FIG. 1 is a perspective view showing a first embodiment of a solvent-carrying sheet of the present invention, and FIG. 2 is a position corresponding to a fixed disk with a resin layer in the waterproof sheet structure of the present invention applied to a housing. It is a longitudinal cross-sectional view. FIG. 2 is a longitudinal sectional view of the position corresponding to the fixed disk with a resin layer as seen from the y direction. In the following description, the upper side in FIGS. 1 and 2 is referred to as “upper” and the lower side is referred to as “lower”.

  The solvent-carrying sheet 80 shown in FIG. 1 has a perfect circle shape in plan view, and the entire shape thereof has a disk shape.

  The solvent-carrying sheet 80 is formed so that the shape in plan view substantially coincides with the fixed disk 60 with resin layer (resin layer 62). In the sheet waterproof structure (sheet waterproof structure of the present invention) 10, shown in FIG. In this way, the resin layer 62 is disposed. That is, it is disposed between the resin layer 62 and the waterproof sheet 20.

  Further, the entire solvent-carrying sheet 80 is composed of a fiber assembly, and is thereby configured as a porous body having pores (voids). Therefore, the solvent carrying sheet 80 (fiber assembly) can carry (impregnate) the solvent.

  Therefore, in the construction method for the waterproof sheet structure described above, when the resin layer (second resin layer) 62 and the waterproof sheet (first resin layer) 20 are joined at the joining portion 64 using the welding method, the resin layer ( Between the second resin layer 62 and the waterproof sheet (first resin layer) 20, a solvent carrying sheet 80 in a state where a solvent is carried is disposed. Thereby, when the fixed disk 60 with a resin layer is pressed from above the waterproof sheet 20 by an operator's hand or the like, a pressing force is also applied to the solvent carrying sheet 80, and the lower surface of the waterproof sheet 20 and the resin layer 62 are applied. The solvent is supplied by leaching between the upper surface and the upper surface of the substrate, and as a result, both of them are in a molten state. Therefore, the lower surface of the waterproof sheet 20 and the upper surface of the resin layer 62 are joined via the solvent carrying sheet 80, and as a result, the upper surface of the resin layer 62 is fixed to the lower surface of the waterproof sheet 20. Thereby, the waterproof sheet 20 is joined to the floor portion 101 via the fixed disk 60 with a resin layer.

  At this time, the amount of the solvent carried on the solvent carrying sheet 80 can be adjusted to a desired amount, and the shape in plan view of the solvent carrying sheet 80 substantially matches the shape in plan view of the resin layer 62. Therefore, by applying the pressing force, the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 located at the joint portion 64 are extended over the edge without depending on the skill level of the worker. The solvent can be supplied uniformly. Therefore, the waterproof sheet 20 and the resin layer 62 can be bonded with excellent strength through the solvent carrying sheet 80 at the bonding portion 64.

  In the waterproof sheet structure 10, the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 are not directly bonded, and the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 are bonded via the solvent carrying sheet 80. However, in this invention, the fiber assembly which comprises the whole solvent carrying | support sheet | seat 80 contains the 1st fiber and 2nd fiber which are provided with a mutually different melting degree with respect to a soluble solvent. Therefore, for example, when the melting degree of the first fiber in the soluble solvent is larger than the melting degree of the second fiber in the soluble solvent, at least a part of the first fiber is in a molten state in the solvent-carrying sheet 80. Therefore, at the interface between the upper surface of the resin layer 62 and the lower surface of the solvent-carrying sheet 80, the molten resin layer 62 and the first fibers are compatible, and the lower surface of the waterproof sheet 20 and the solvent-carrying sheet 80 are mixed. The waterproof sheet 20 in a molten state and the first fiber are compatible with each other at the interface with the upper surface of the resin, and the first fiber is anchored to the resin layer 62 and the waterproof sheet 20 by solidifying in this state. ), The waterproof sheet 20 and the resin layer 62 can be firmly joined via the solvent-carrying sheet 80.

  In the case of using the brush welding method among the welding methods, the solvent carrying in a state where the solvent is carried on the upper surface of the resin layer 62 prior to laying the waterproof sheet 20 on the surfaces of the floor portion 101 and the wall portion 102. After the sheet 80 is disposed, the waterproof sheet 20 may be laid on the surfaces of the floor portion 101 and the wall portion 102.

  The method for supporting the solvent on the solvent-carrying sheet 80 is not particularly limited. For example, after the unsupported solvent-carrying sheet 80 is disposed on the upper surface of the resin layer 62, the solvent-carrying sheet is used. 80 may be applied with a solvent, or the solvent-carrying sheet 80 may be carried by immersing the solvent-carrying sheet 80 in an unsupported state in the solvent. The sheet 80 may be disposed on the upper surface of the resin layer 62. In the former case, the amount of the solvent to be carried on the solvent carrying sheet 80 can be set by adjusting the amount of the solvent applied to the solvent carrying sheet 80. In the latter case, the solvent carrying sheet In accordance with the porosity of the pores included in 80, the amount of the solvent carried on the solvent carrying sheet 80 is set.

  Furthermore, before the construction of the waterproof sheet structure 10, the quantity of the fixed disk 60 with the resin layer and the solvent carrying sheet 80 prepared in advance are matched, and the number of the solvent carrying sheets 80 is confirmed after this construction. Forgetting the disposition of the solvent-carrying sheet 80 on the upper surface of the resin layer 62, and thus the forgotten carrying of the solvent on the solvent-carrying sheet 80 can be reliably prevented.

  In this case, the solvent-carrying sheet 80 is preferably colored such as light blue, yellow, and green on the surface thereof. As a result, the color of the color varies depending on whether the solvent-carrying sheet 80 is loaded or not, and the state in which the solvent is loaded can be visually confirmed, so that the worker can carry the solvent on the solvent-carrying sheet 80. It is possible to effectively prevent forgetting.

  Further, when the injection welding method is used among the welding methods, the solvent-carrying sheet in an unsupported state is formed on the upper surface of the resin layer 62 before the waterproof sheet 20 is laid on the surfaces of the floor portion 101 and the wall portion 102. After 80 is disposed, the waterproof sheet 20 is laid on the surfaces of the floor portion 101 and the wall portion 102. Thereafter, the injection needle provided in the syringe is in a state of penetrating the waterproof sheet 20, and the solvent may be selectively supplied from the syringe to the solvent carrying sheet 80 positioned between the resin layer 62 and the waterproof sheet 20. .

  Even when such an injection welding method is used, the solvent-carrying sheet 80 is located between the resin layer 62 and the waterproof sheet 20 so as to correspond to the joining portion 64, and the solvent-carrying sheet 80 carries the solvent. In order to exhibit the function as the dam material, the solvent can be uniformly supplied to the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 located at the joining portion 64 up to the edge thereof.

  In addition, for joining the fixing disk 60 with resin layer (resin layer 62) and the waterproof sheet 20, in addition to the above-mentioned I) welding method, it is conceivable to use II) thermal fusion method, for the following reasons. I) The welding method is preferably used.

  In this heat fusion method, first, the waterproof sheet 20 is laid on the surfaces of the floor portion 101 and the wall portion 102. Next, a high frequency is applied from the upper surface side of the laid waterproof sheet 20 at a position corresponding to the fixed disk 60 with a resin layer. As a result, the fixed disk 61 is heated, and this heat is transmitted to the resin layer 62, whereby the resin layer 62 is brought into a heat-melted state. Next, the lower surface of the waterproof sheet 20 is fixed to the upper surface of the resin layer 62 by pressing the fixing disk 60 with a resin layer from above the waterproof sheet 20 by the hand of an operator or the like. Thereby, the waterproof sheet 20 is joined to the floor portion 101 via the fixed disk 60 with a resin layer.

  As described above, the lower surface of the waterproof sheet 20 and the upper surface of the resin layer 62 are joined. Usually, as a method of applying a high frequency to the fixed disk 60 with a resin layer from the upper surface side of the waterproof sheet 20, high frequency fusion is used. A method is used in which the high-frequency head provided in the machine is pressed against the fixed disk 60 with a resin layer from above the waterproof sheet 20. This high-frequency fusion machine is a large-scale device and has a problem in cost because it needs to be prepared for each worker. Furthermore, since it is used at a high voltage, its use is limited during rainfall and snowfall.

  In FIG. 2, the diameter of the solvent-carrying sheet 80 is set to be approximately equal to the diameter of the resin layer 62, but is set to be approximately equal to the diameter of the resin layer 62 or slightly smaller than the diameter of the resin layer 62. Is preferred. Thereby, while being able to supply a solvent uniformly to the upper surface of the resin layer 62 located in the joining part 64, and the lower surface of the waterproof sheet 20 over the edge part, the solvent supplied to the upper surface of the resin layer 62 Leaking from the edge of the resin layer 62 and reaching the floor portion 101 can be accurately suppressed or prevented.

The supported amount of the solvent of a solvent-bearing sheet 80, 0.00015mL / mm ² or more, preferably 0.0006mL / mm ² or less, 0.0003mL / mm ² or more, 0.0005mL / mm ² or less It is more preferable that Accordingly, an appropriate amount of solvent can be supplied to both the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20, and the upper surface of the resin layer 62 and the lower surface of the waterproof sheet 20 can be surely brought into a molten state. In addition, it is possible to accurately suppress or prevent the solvent supplied to the upper surface of the resin layer 62 from leaking from the edge of the resin layer 62 and reaching the floor 101.

  The thickness of the solvent-carrying sheet 80 is not particularly limited, but is preferably 0.1 mm or more and 2 mm or less, and more preferably 0.5 mm or more and 1.5 mm or less.

  The solvent-carrying sheet 80 is composed of a fiber assembly containing first and second fibers having different melting degrees with respect to the soluble solvent. Examples of the fiber assembly include woven and knitted fabrics. , Nonwoven fabrics, aggregates of short fibers, and the like. The woven or knitted fabric includes woven fabric (woven fabric), knitted fabric or the like. Examples of the woven fabric include plain weave, oblique weave, and satin weave. Examples of the knitted fabric include those subjected to weft knitting (flat knitting), warp knitting (tricot knitting), circular knitting, flat knitting, knitting, and the like.

  Further, the fiber assembly contains the first fiber and the second fiber having different melting degrees with respect to the soluble solvent, and these fibers are not particularly limited. For example, cotton, flax, ramie, silk And natural fibers such as wool, polyester such as polyethylene terephthalate and polybutylene terephthalate, polytetrafluoroethylene, polyamide (nylon), aromatic polyamide resins such as aromatic polyamide, polyimide, polybenzoxazole, polyvinyl chloride Resin fibers (chemical fibers) such as vinyl chloride-based resins are exemplified, and among these, fibers having different solubilities with respect to the soluble solvent are selected as the first fibers and the second fibers.

  Among these fibers, resin fibers are preferable. Since many resin fibers have different melting degrees with respect to various solvents depending on the type, the range of selection as the first fiber and the second fiber is expanded.

  For example, as described above, when the solubility of the first fiber in the soluble solvent is greater than the solubility of the second fiber in the soluble solvent, and when tetrahydrofuran is selected as the soluble solvent, the first fiber is chlorinated. A vinyl resin is preferred. Since the vinyl chloride resin has a high degree of melting with respect to tetrahydrofuran, the solvent carrying sheet 80 is loaded with tetrahydrofuran (soluble solvent) by containing the vinyl chloride resin as the first fiber in the solvent carrying sheet 80. At this time, the first fibers can be reliably melted.

  Moreover, it is preferable that it is an aromatic polyamide-type resin as a 2nd fiber. Since the aromatic polyamide-based resin has a low degree of melting with respect to tetrahydrofuran, tetrahydrofuran (soluble solvent) is supported on the solvent-supporting sheet 80 by including the aromatic polyamide-based resin as the second fiber in the solvent-supporting sheet 80. Even if it is allowed to occur, the melting of the second fibers can be accurately suppressed or prevented, so that the second fibers can be left in the solvent-carrying sheet 80 and the carried tetrahydrofuran (soluble solvent) can be reliably held. .

  As described above, the first fiber has a high melting degree with respect to tetrahydrofuran (soluble solvent) and the second fiber has a low melting degree with respect to tetrahydrofuran (soluble solvent). Function can be demonstrated. Further, the first fibers are melted, and the resin layer 62 and the first fibers are mixed at the interface between the upper surface of the resin layer 62 and the lower surface of the solvent-carrying sheet 80, and the lower surface of the waterproof sheet 20 and the solvent-carrying The waterproof sheet 20 and the first fibers can be mixed at the interface with the upper surface of the sheet 80 for use. From these things, the waterproof sheet 20 and the resin layer 62 can be firmly joined via the solvent carrying sheet 80 in which the second fibers remain.

  Further, when the content of the first fiber in the fiber assembly is C [wt%] and the content of the second fiber is D [wt%], C / D is a combination of the first fiber and the second fiber. However, it is preferably 0.1 or more and 0.9 or less, more preferably 0.3 or more and 0.7 or less. Thereby, the first fiber and the second fiber can each surely exhibit the functions described above.

  Moreover, although the thickness of these fibers is based also on the kind, it is preferable that they are 2 micrometers or more and 30 micrometers or less, for example, and it is more preferable that they are 3 micrometers or more and 15 micrometers or less. As a result, it is possible to easily form the solvent-carrying sheet 80 having the porosity in the above-described range while maintaining the strength as the solvent-carrying sheet 80.

  In the present embodiment, the waterproof sheet 20 and the fixed disk 60 with the resin layer are joined via the solvent carrying sheet 80, but the fixed disk 61 included in the fixed disk 60 with the resin layer is not particularly limited. However, for example, a steel plate such as a stainless steel plate or an iron plate, an aluminum plate, a copper plate, or the like is used, but a steel plate is preferable. Thereby, the fixed disk 60 with a resin layer can have excellent strength.

  The thickness of the fixed disk 61 is not particularly limited, but is preferably about 0.1 mm or more and 3 mm or less, and more preferably about 0.3 mm or more and 2.5 mm or less.

  Further, the diameter of the fixed disk 61 is not particularly limited, but is preferably about 20 mm or more and 150 mm or less, and more preferably about 40 mm or more and 100 mm or less.

  Examples of the resin (resin material) constituting the resin layer (second resin layer) 62 include vinyl chloride resins such as polyvinyl chloride, polyolefin resins, and ethylene vinyl acetate copolymers. One or two or more of these can be used in combination, but polyvinyl chloride is preferred. That is, it is preferable that they are the same or the same as the resin constituting the solvent-carrying sheet 80 and the waterproof sheet 20 described later. Thereby, the adhesiveness of the resin layer 62 and the waterproof sheet 20 through the solvent carrying sheet 80 can be improved. Furthermore, since polyvinyl chloride is excellent in solvent weldability, the above-described effects can be exhibited more significantly, and corrosion of the fixed disk 61 can be more reliably prevented.

  The resin constituting the resin layer 62 may include other materials such as a plasticizer and a stabilizer mentioned in the constituent material of the waterproof sheet 20 described later.

  The thickness of the resin layer 62 is not particularly limited, but is preferably 0.1 mm or more, and more preferably 0.3 mm or more and 1.8 mm or less. Thereby, for example, even if stress is applied to the resin layer 62 due to the waterproof sheet 20 being blown with wind, the occurrence of cracks and breaks in the resin layer 62 can be accurately suppressed. .

  Further, the waterproof sheet (first resin layer) 20 is made of a resin (resin material), and the resin is not particularly limited. For example, a vinyl chloride resin such as polyvinyl chloride, a polyolefin resin, ethylene A vinyl acetate copolymer etc. are mentioned, Among these, it can use combining 1 type (s) or 2 or more types. Among these, a vinyl chloride resin is preferable. Thereby, the solvent weldability of the waterproof sheet 20 can be made excellent.

  The vinyl chloride resin is not particularly limited as long as it is a polymer containing vinyl chloride, that is, an oligomer, a prepolymer and a polymer. For example, a vinyl chloride monomer or vinyl chloride and vinyl acetate, ethylene Or a copolymer with propylene and the like, and a mixture of two or more of these polymers.

  The resin material may further contain various plasticizers, various stabilizers, various antioxidants, various ultraviolet absorbers, processing aids, lubricants, fillers, flame retardants, and coloring materials, In particular, a plasticizer is preferably included. Thereby, the waterproof sheet 20 can have more excellent flexibility.

  The plasticizer is not particularly limited. For example, phthalate plasticizers such as DOP (dioctyl phthalate), DBP (dibutyl phthalate), DIBP (diisobutyl phthalate), and DHP (diheptyl phthalate), DOA ( Aliphatic dibasic ester plasticizers such as di-2-ethylhexyl adipate), DIDA (diisodecyl adipate), DOS (di-2-ethylhexyl sebacate), aromatic carboxylic acid esters such as benzoates of ethylene glycol And plasticizers, trimellitic acid ester plasticizers such as TOTM (trioctyl trimellitate), and the like, and one or more of them can be used in combination.

  Examples of the stabilizer include glycine zinc. In this case, examples of the stabilizer include tricresyl phosphate (TCP), trixyl phosphate (TXP), tributyl phosphate (TBP), and phosphoric acid. Examples thereof include organic phosphates such as tri-2-ethylhexyl and 2-ethylhexyl diphenyl phosphate.

  From the above, the waterproof sheet 20 is preferably composed of a vinyl chloride resin sheet containing a vinyl chloride resin and a plasticizer. Thereby, the said effect can be exhibited more notably.

  The waterproof sheet 20 is composed of a single layer of the resin sheet, for example, a fiber layer interposed in the middle of the thickness direction, that is, a first resin laminated in the thickness direction. The thing of the structure by which the fiber layer (fiber sheet) was clamped between the layer and the 2nd resin layer may be sufficient.

  The fiber layer is composed of an aggregate of fibers, and examples thereof include a cloth sheet such as a cloth such as a woven fabric or a non-woven fabric, a net formed with a plurality of lattices of warp and weft, and a waterproof sheet. By providing 20 with such a fiber layer, the strength (tear strength, tensile strength, etc.) and durability (resistance to repeated fatigue) of the waterproof sheet 20 can be improved.

  Moreover, the thickness of the waterproof sheet 20 is not particularly limited, but is preferably about 0.5 mm or more and 3 mm or less, and more preferably about 0.8 mm or more and 2 mm or less. Thereby, the floor part 101 and the wall part 102 can be reliably covered with the waterproof sheet 20. Moreover, even if stress acts on this waterproof sheet 20 due to the waterproof sheet 20 being blown with wind, it is possible to accurately suppress the occurrence of cracks in the waterproof sheet 20 at an early stage.

  In the present embodiment, the resin layer 62 and the solvent-carrying sheet 80 are not joined to each other before the waterproof sheet structure 10 is constructed, and the resin layer-fixed disk 60 and the solvent-carrying sheet 80 are separated from each other. Although the case where the solvent-carrying sheet 80 is disposed on the resin layer 62 during construction of the sheet waterproof structure 10 has been described, the present invention is not limited to this configuration, and the solvent-carrying sheet 80 is not limited to the sheet waterproof structure 10. Prior to the construction, the resin layer 62 may be fixed in advance. That is, the fixed disk 60 with a resin layer and the solvent carrying sheet 80 may be prepared in advance as the same body.

Second Embodiment
Next, a second embodiment of the solvent-carrying sheet of the present invention that is applied to the joining of two waterproof sheets 20 at the joining part 25 will be described.

  FIG. 3 is a perspective view showing a second embodiment of the solvent-carrying sheet of the present invention, and FIG. 4 is a longitudinal section at a position where two waterproof sheets overlap each other in the waterproof sheet structure of the present invention applied to the housing. FIG. FIG. 4 is a longitudinal sectional view of the position where the waterproof sheets overlap each other as viewed from the x direction. In the following description, the upper side in FIGS. 3 and 4 is referred to as “upper” and the lower side is referred to as “lower”.

  Hereinafter, the solvent-carrying sheet 85 of the second embodiment will be described focusing on the differences from the solvent-carrying sheet 80 of the first embodiment, and description of similar matters will be omitted.

  The solvent carrying sheet 85 shown in FIG. 3 is applied to the joining of the two waterproof sheets (first waterproof sheet and second waterproof sheet) 20 at the joining portion 25, and the shape is different from that shown in FIG. This is the same as the solvent carrying sheet 80 shown.

  That is, the solvent carrying sheet 85 of the second embodiment corresponds to the shape of the joint portion 25 that overlaps each other at the edge 22 in the y direction of the two waterproof sheets (first and second resin layers) 20. The overall shape is a long shape (strip shape).

  As shown in FIG. 4, the solvent carrying sheet 85 carries a solvent between the two waterproof sheets 20 at the joint portion 25 where the two waterproof sheets 20 overlap each other in the waterproof sheet structure 10. Arranged in a state.

  Accordingly, the two waterproof sheets 20 can be supplied between the waterproof sheets 20 by pressing the two waterproof sheets 20 from the opposite side of the floor portion 101 by an operator's hand or the like. Are joined via the solvent carrying sheet 85.

  The width of the solvent-carrying sheet 85 is preferably about 0.5 mm or more and 3 mm or less, and more preferably about 0.8 mm or more and 2 mm or less. Thereby, the waterproof sheets 20 can be reliably bonded to each other without unnecessarily increasing the width of the bonding portion 25 where the waterproof sheets 20 overlap.

  The same effect as that of the first embodiment can be obtained by the solvent carrying sheet 85 of the second embodiment.

<Third Embodiment>
Next, a third embodiment of the solvent-carrying sheet of the present invention that is applied to the bonding between the fixing disk 60 with resin layer (resin layer 62) and the waterproof sheet 20 at the bonding portion 64 will be described.

  FIG. 5 is a perspective view showing a third embodiment of the solvent-carrying sheet according to the present invention, and FIG. 6 shows the wind at a position corresponding to the fixed disk with a resin layer in the waterproof sheet structure according to the present invention applied to the housing. It is a longitudinal cross-sectional view which shows the state beaten by. FIG. 6 is a longitudinal sectional view of the position corresponding to the fixed disk with a resin layer as seen from the y direction. In the following description, the upper side in FIGS. 5 and 6 is referred to as “upper” and the lower side is referred to as “lower”.

  Hereinafter, the solvent-carrying sheet 90 of the third embodiment will be described focusing on the differences from the solvent-carrying sheet 80 of the first embodiment, and description of similar matters will be omitted.

  The solvent-carrying sheet 90 shown in FIG. 5 has a first part (center part) 91 located on the center side and a second part (edge part) 92 located on the edge side. 1 and the second portion 92 are the same as the solvent-carrying sheet 80 shown in FIG. 1 except that the contents of the first fiber and the second fiber contained in the fiber assembly are different from each other.

  That is, the solvent-carrying sheet 90 of the third embodiment has a disk-like overall shape, as in the solvent-carrying sheet 80 shown in FIG. 91 and a second part 92 having an annular shape formed so as to surround the first part 91. And the content of the 1st fiber and the 2nd fiber which are contained in the fiber assembly in these 1st parts 91 and 2nd parts 92 is different, respectively, and by this, in this embodiment, in 1st part 91 When the bonding strength is A [N / mm] and the bonding strength at the second portion 92 is B [N / mm], the relationship of A> B is satisfied.

  In order to satisfy the relationship of A> B, when the melting degree of the first fiber with respect to the soluble solvent is larger than the melting degree of the second fiber with respect to the soluble solvent, for example, the first fiber is contained in the first portion 91. This can be realized by making the amount larger than the content of the first fiber in the second portion 92.

  Here, in the waterproof sheet structure 10, the waterproof sheet 20 is blown by wind under strong winds such as typhoons and gusts (see FIG. 6). Therefore, stress is generated due to being blown by wind at the joint portion 64 joined to the fixed disk 60 with resin layer (resin layer 62) through the solvent-carrying sheet 90 of the waterproof sheet 20. In particular, the stress locally acts on the boundary portion 65 between the joint portion 64 of the waterproof sheet 20 and the solvent-carrying sheet 90, that is, the position joined to the edge of the solvent-carrying sheet 90 in the waterproof sheet 20. To do.

  Thus, when stress concentrates on the boundary part 65 over a long period of time, in the boundary part 65, the waterproof sheet 20 is cracked, and as a result, the waterproof property of the waterproof sheet 20 may be lowered. In the embodiment, as described above, the relationship between the bonding strength A [N / mm] at the first portion 91 and the bonding strength B [N / mm] at the second portion 92 satisfies A> B. Therefore, when the waterproof sheet 20 is blown by wind, peeling occurs between the waterproof sheet 20 and the second portion 92 of the solvent carrying sheet 90 over time. Therefore, the boundary portion 65 of the waterproof sheet 20 that is bent whenever the waterproof sheet 20 is blown by the wind moves from the edge of the solvent carrying sheet 90 to the center side with time, and the waterproof sheet 20 is bent. It is possible to reliably prevent the position (bent portion) from being fixed at one point. As a result, the occurrence of cracks in the waterproof sheet 20 is accurately suppressed or prevented. Furthermore, even if peeling between the waterproof sheet 20 and the second portion 92 proceeds and the waterproof sheet 20 is completely peeled from the second portion 92, the first portion of the waterproof sheet 20 and the solvent-carrying sheet 90 is removed. Since peeling with respect to 91 can be accurately suppressed or prevented, the fixing of the waterproof sheet 20 to the floor portion 101 of the fixed disk 61 is accurately suppressed or prevented.

  From the above, the occurrence of cracks in the waterproof sheet 20 is accurately suppressed or prevented, and thus the waterproof property of the waterproof sheet 20 can be maintained over a long period of time.

Further, when the area of the first part 91 in plan view is S _A [N / mm] and the area of the second part 92 is S _B [N / mm], S _A / S _B is 0.1 or more. It is preferable to satisfy the relationship of 2.0 or less, and it is more preferable to satisfy the relationship of 0.3 or more and 1.0 or less. Thereby, the effect of maintaining the waterproofness of the waterproof sheet 20 over a long period of time can be reliably obtained by making the peeling between the waterproof sheet 20 and the second portion 92 proceed.

  The same effect as that of the first embodiment can be obtained by the solvent carrying sheet 90 of the third embodiment.

  As mentioned above, although the sheet | seat for solvent holding | maintenance of this invention, a sheet | seat waterproof structure, and the welding method were demonstrated, this invention is not limited to these.

  For example, in the solvent-carrying sheet and sheet waterproof structure of the present invention, each component can be replaced with any component that can exhibit the same function, or any component can be added.

In addition, in the above-described embodiment, the solvent-carrying sheet of the present invention has been described with respect to the case where the entire sheet is configured with a fiber assembly. For example, the edge portion may be constituted by a fixing plate (guide) for fixing the fiber assembly, and the center portion may be constituted by the fiber assembly.
Furthermore, one or two or more optional steps may be added to the welding method of the present invention.

DESCRIPTION OF SYMBOLS 10 Sheet waterproof structure 20 Waterproof sheet 22 Edge 25 Joining part 50 Arrangement member 51 Bottom part 52 Standing surface 60 Fixed disk 61 with a resin layer 61 Fixed disk 62 Resin layer 63 Through hole 64 Joining part 65 Boundary part 70 Fixed screw 80 Solvent carrying sheet 85 Solvent-carrying sheet 90 Solvent-carrying sheet 91 First part 92 Second part 100 Housing 101 Floor part 102 Wall part 103 Boundary part 500 Sheet waterproof structure

Claims (13)

In the waterproof sheet structure for waterproofing the casing, the first resin layer and the second resin layer, each containing a resin material, are melted and joined using a soluble solvent at a joining portion generated by overlapping these in the thickness direction. Used for welding,
A fiber assembly containing a first fiber and a second fiber each having a different degree of melting with respect to the soluble solvent, and in the state where the soluble solvent is supported on the fiber assembly, The soluble solvent can be leached between the first resin layer and the second resin layer when disposed between the first resin layer and the second resin layer and applying a pressing force to the fiber assembly. A solvent-carrying sheet characterized by being configured as described above.   The solvent carrying sheet according to claim 1, wherein the resin material contains a vinyl chloride resin.   The solvent-supporting sheet according to claim 1, wherein the soluble solvent contains tetrahydrofuran.   The solvent-carrying sheet according to any one of claims 1 to 3, wherein the first fiber has a higher degree of melting with respect to the soluble solvent than that of the second fiber with respect to the soluble solvent.   The solvent-carrying sheet according to claim 4, wherein both the first fiber and the second fiber are resin fibers.   The solvent-carrying sheet according to claim 5, wherein the first fiber contains a vinyl chloride resin.   The solvent-carrying sheet according to claim 5 or 6, wherein the second fiber contains a polyamide-based resin.   The solvent-carrying sheet according to any one of claims 1 to 7, wherein the solvent-carrying sheet has a thickness of 0.1 mm or more and 2 mm or less. The solvent carrying sheet according to any one of claims 1 to 8, wherein the carrying amount of the soluble solvent is 0.00015 mL / mm ² or more and 0.0006 mL / mm ² or less.   10. The sheet waterproof structure according to claim 1, wherein the first resin layer and the second resin layer are a first waterproof sheet and a second waterproof sheet, respectively, covering at least a part of a floor portion of the casing. The solvent carrying sheet according to claim 1. In the waterproof sheet structure, the first resin layer is a waterproof sheet that covers at least a part of a floor portion of the casing,
The second resin layer is a resin sheet that is interposed between the waterproof sheet and the floor portion, and a fixing disk with a resin sheet used for fixing the waterproof sheet to the floor portion is provided on the upper surface thereof. The solvent-supporting sheet according to any one of claims 1 to 9. A sheet waterproof structure for waterproofing the housing,
A first resin layer and a second resin layer each containing a resin material;
In the joint portion where the first resin layer and the second resin layer are overlapped and joined in the thickness direction, the first resin layer and the second resin layer are sandwiched between the first resin layer and the second resin layer, and are mutually attached to the soluble solvent. A waterproof sheet structure comprising: a fiber assembly containing first fibers and second fibers having different melting degrees, and a solvent-carrying sheet capable of supporting a soluble solvent on the fiber assembly. In the waterproof sheet structure for waterproofing the housing, the first resin layer and the second resin layer each containing a resin material are joined in the thickness direction by melting and joining using a soluble solvent. Welding method,
In the state in which the solvent-supporting sheet including the fiber assembly containing the first fiber and the second fiber having different melting degrees with respect to the soluble solvent is supported in the state where the soluble solvent is supported on the fiber assembly. A first step of disposing the first resin layer and the second resin layer at a site;
By applying a pressing force to the fiber assembly and leaching the soluble solvent between the first resin layer and the second resin layer from the solvent-carrying sheet, the first resin layer and the second resin And a second step of melting and joining the layers.

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