Base protection structure, frame covering structure and base protection structure formation set

Abstract

To provide a substrate protection structure including a transition layer capable of efficiently transferring a plasticizer to a waterproof sheet or the like as a substrate laid on a skeleton, and capable of suppressing or preventing the occurrence of stickiness on the surface of the transition layer over a long period of time, and a skeleton covering structure with such a substrate protection structure, and a substrate protection structure forming set capable of forming such a substrate protection structure.SOLUTION: A substrate protection structure 301 includes a transition layer 1 covering at least a part of a substrate covering a skeleton having a floor part, and a particle layer 3 laminated on the transition layer 1, the transition layer 1 contains a vinyl chloride-based resin, a plasticizer and a solvent, and is constituted so as to transfer the plasticizer to the substrate, and the particle layer 3 has a plurality of particles 31, and the particles 31 are spread all over to form a single layer.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a base protection structure, a frame covering structure, and a set for forming a base protection structure. [Background technology]

[0002] In recent years, with the demand for higher durability in buildings, sheet waterproofing structures in which resin sheets are laid and constructed have been adopted for the rooftops, verandas, and other structural members of many buildings (see, for example, Patent Document 1).

[0003] In this sheet waterproofing structure, for example, a steel plate (metal plate) coated with vinyl chloride resin and formed to correspond to the shape of the boundary between the roof floor and a wall section erected along the outer edge of the floor is placed at the boundary, and at least a portion of this steel plate is covered with a waterproof sheet containing vinyl chloride resin and a plasticizer, thereby waterproofing the boundary section of the roof.

[0004] Naturally, rooftops and other structures to be waterproofed have a variety of shapes. Therefore, steel plates of various shapes are prepared in advance, and a number of plates are selected to match the shape of the boundary of the rooftop or other structure to be waterproofed. These steel plates are then arranged so that gaps are formed between adjacent plates in accordance with the shape of the boundary, and the steel plates are then covered with a waterproof sheet.

[0005] In sheet waterproofing structures of this type, over time after installation, exposure to sunlight and rainwater (muddy water) causes the plasticizer to volatilize from the waterproof sheet, resulting in a decrease in the sheet's flexibility. This creates stress in the waterproof sheet, which can lead to concerns about a decrease in the waterproofing properties of the waterproof sheet.

[0006] Since the generation of stress in this waterproof sheet is due to the evaporation of plasticizer from the waterproof sheet, it has been proposed, for example, in Patent Documents 2 and 3, to attach a transition (maintenance and repair) sheet containing vinyl chloride resin and plasticizer to the waterproof sheet.

[0007] By attaching the transfer sheet to the waterproof sheet in this way, the plasticizer contained in the transfer sheet can be transferred (diffused) into the waterproof sheet, thereby restoring the waterproof sheet to excellent flexibility, and as a result, the generation of stress in the waterproof sheet can be eliminated.

[0008] There is a need to develop other configurations that can efficiently transfer plasticizer to waterproof sheets, not just those in which a transfer sheet is attached to the waterproof sheet. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-70877 [Patent Document 2] Japanese Patent Application Publication No. 8-207157 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-196947 Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, instead of using a transfer sheet, it is possible to apply and dry a cream-like resin composition for forming a transfer layer, which contains a vinyl chloride resin, a plasticizer, and a solvent, to form a transfer layer containing a vinyl chloride resin and a plasticizer on the waterproof sheet.However, in this case, the surface of the transfer layer becomes sticky because the transfer layer contains a sufficient amount of plasticizer to transfer to the waterproof sheet, which in turn causes various problems.

[0011] Therefore, the object of the present invention is to provide a base protection structure that has a transfer layer that can efficiently transfer a plasticizer to a waterproof sheet or the like that is laid on a structure as a base, and that can suppress or prevent stickiness from occurring on the surface of this transfer layer over a long period of time, a structure covering structure that has such a base protection structure, and a set for forming a base protection structure that can form such a base protection structure. [Means for solving the problem]

[0012] These objects can be achieved by the present invention as set forth in (1) to (8) below. (1) A base protection structure comprising a transition layer that covers at least a portion of a base covering a body having a floor portion, and a particle layer laminated on the transition layer, the transfer layer contains a vinyl chloride resin, a plasticizer, and a solvent, and is configured to transfer the plasticizer to the substrate; The particle layer has a plurality of particles, the particles being spread out to form a single layer.

[0013] (2) The underlayer protection structure according to (1), wherein the particles are inorganic particles. (3) The underlayer protection structure according to (2) above, wherein the inorganic particles are talc particles.

[0014] (4) The underlayer protection structure according to (2) or (3), wherein the inorganic particles are scaly or plate-like.

[0015] (5) The underlayer protection structure according to any one of (1) to (4) above, wherein the particles have an average particle size of 0.6 μm or more and 40.0 μm or less.

[0016] (6) A substrate protection structure according to any one of (1) to (5) above, wherein the substrate is a waterproof sheet.

[0017] (7) A body covering structure comprising the substrate protection structure according to any one of (1) to (6) above and the substrate.

[0018] (8) a transition layer covering at least a portion of a base covering a body having a floor section; a particle layer having a plurality of particles laid out in a single layer, a set for forming an underlayer protective structure, the set including a resin composition for forming a transition layer used to form the transition layer and a plurality of the particles used to form the particle layer, a resin composition for forming a transition layer, the resin composition including a vinyl chloride resin, a plasticizer, and a solvent, is applied to at least a portion of the base to form a coating film; The set for forming a base protection structure is characterized in that it is configured so that the particle layer is formed by laying a plurality of the particles in a single layer on the coating film, and then the coating film is dried to form the transition layer. [Effects of the Invention]

[0019] According to the present invention, plasticizer can be efficiently transferred from the transition layer provided in the base protection structure to a waterproof sheet or the like that is laid on the main body as a base, and since the transition layer in the base protection structure is covered with a particle layer in which particles are laid out in a single layer, the occurrence of stickiness on the surface of this transition layer can be suppressed or prevented over a long period of time. [Brief explanation of the drawings]

[0020] [Figure 1] This is a partial oblique view of a body covering structure that includes a sheet waterproofing structure applied to a body and a base protection structure formed on a waterproof sheet that serves as a base for the sheet waterproofing structure. [Figure 2] 2 is a cross-sectional view of the body covering structure shown in FIG. 1 taken along line AA. [Figure 3] 3 is an enlarged cross-sectional view of the periphery of the base protection structure located in the area [B] surrounded by the dotted line in the skeleton covering structure shown in FIG. 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The base protection structure, the frame covering structure, and the set for forming the base protection structure of the present invention will be described in detail below with reference to preferred embodiments shown in the accompanying drawings.

[0022] First, a description will be given below of a frame covering structure (frame covering structure of the present invention) in which the base protection structure of the present invention is applied to a sheet waterproofing structure having a waterproof sheet as a base.

[0023] <Body covering structure> Fig. 1 is a partial perspective view of a structural covering structure comprising a sheet waterproofing structure applied to a structural body and a base protection structure formed on a waterproof sheet as a base for the sheet waterproofing structure; Fig. 2 is a cross-sectional view of the structural covering structure shown in Fig. 1 taken along line AA; and Fig. 3 is an enlarged cross-sectional view of the periphery of the base protection structure located in the area [B] enclosed by the dotted line in the structural covering structure shown in Fig. 2. In the following explanation, the upper side in Figs. 1 to 3 will be referred to as "upper" and the lower side will be referred to as "lower." Furthermore, for ease of explanation, Fig. 1 does not show the entire sheet waterproofing structure provided in the structural covering structure, but only partially illustrates the vicinity of the boundary between the floor and wall portions of the structural body.

[0024] The body covering structure 500 (body covering structure of the present invention) comprises a sheet waterproofing structure 10 installed on a body 100 (structural body) such as a roof or balcony, and a base protection structure 301 for maintaining and repairing this sheet waterproofing structure 10.

[0025] In this embodiment, as shown in FIG. 1, the body 100 has a floor portion 101 and a wall portion 102 that stands along the outer edge of the floor portion 101 so as to surround it.

[0026] The sheet waterproofing structure 10 is constructed on this main body 100, i.e., the wall portion 102 that forms the frame and the floor portion 101 that forms the bottom of the wall portion 102, and has a waterproof sheet 20 and a positioning member 50, which provides waterproofing to the main body 100.

[0027] A plurality of placement members 50 are arranged in a line along the boundary 103 between the floor 101 and the wall 102, and in this state, the waterproof sheet 20 covers adjacent placement members 50 so as to straddle them, thereby ensuring waterproofing at the boundary 103 of the structure 100. That is, the boundary 103 of the structure 100 is a location where cracks and other fissures are likely to occur when exposed to sunlight or rainwater, but this boundary 103 is prevented from being directly exposed to sunlight or rainwater, and the placement members 50 and waterproof sheet 20 are exposed to sunlight and rainwater, thereby ensuring waterproofing at the boundary 103 of the structure 100.

[0028] As described above, the placement member 50 is placed near the boundary 103 between the floor portion 101 and the wall portion 102.

[0029] The arrangement member 50 is made of a metal plate (steel plate) whose surface is coated with resin, and has a bottom portion 51 and a rising surface 52 as shown in FIG. The bottom portion 51 has a rectangular shape surrounded by four sides in a plan view facing the floor portion 101.

[0030] Furthermore, the rising surface 52 stands upright from the edge of the bottom 51, i.e., one of the four long sides, and when viewed in a plan view facing the wall 102, forms a rectangular shape surrounded by four sides, with long sides having the same length as the long sides of the bottom 51.

[0031] The bottom portion 51 and the rising surface 52 are positioned so as to correspond to the floor portion 101 and the wall portion 102, respectively, when placed in the boundary portion 103.

[0032] In this embodiment, two positioning members 50 (first positioning member and second positioning member) having the above-described configuration are arranged side by side along the boundary portion 103 with a gap 55 formed therebetween.

[0033] In this embodiment, two placement members 50 of the same shape are placed at the boundary 103, but since the shape of the structure 100 to be waterproofed naturally varies, placement members 50 of a plurality of different shapes are prepared in advance, and a plurality of placement members 50 are selected that match the shape of the boundary 103 of the structure 100 to be actually waterproofed. These placement members 50 are then lined up with gaps 55 formed in the boundary 103 so as to correspond to the shape of the boundary 103.

[0034] As described above, the placement member 50 is made of a metal plate whose surface is coated with resin. By coating the metal plate with resin in this manner, corrosion of the metal plate can be reliably prevented.

[0035] The metal plate is not particularly limited, but examples thereof include steel plates such as stainless steel plates and iron plates, aluminum plates, and copper plates, with steel plates being preferred, as this allows the positioning member 50 to have excellent strength.

[0036] The thickness of the metal plate 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.

[0037] Examples of resins include vinyl chloride resins such as polyvinyl chloride, polyolefin resins, and ethylene-vinyl acetate copolymers, and these can be used alone or in combination of two or more, but polyvinyl chloride is preferred. Polyvinyl chloride has excellent solvent welding and heat fusion properties, and can more reliably prevent corrosion of metal plates.

[0038] The thickness of the resin covering the metal plate is not particularly limited, but is preferably about 0.03 mm or more and 2 mm or less, and more preferably about 0.1 mm or more and 0.7 mm or less.

[0039] As shown in Figure 1, the waterproof sheet 20 is in the form of a sheet (plate) and covers two adjacently arranged positioning members 50 (a first positioning member and a second positioning member) while encompassing the gap 55 formed between them.

[0040] This prevents the boundary portion 103 from being directly exposed to sunlight or rainwater, and instead exposes the placement member 50 and the waterproof sheet 20 to sunlight and rainwater, thereby ensuring waterproofing at the boundary portion 103 of the main body 100.

[0041] Such a waterproof sheet 20 is made of a vinyl chloride resin sheet containing a vinyl chloride resin such as polyvinyl chloride and a plasticizer. With a waterproof sheet 20 of this configuration, by laminating the waterproof sheets 20 together in a heated state, the two positioning members 50 can be covered with the waterproof sheet 20 across the gap 55.

[0042] The thickness of the waterproof sheet 20 is not particularly limited, but is preferably, for example, between 0.1 mm and 5 mm, and more preferably between 0.3 mm and 2 mm. This allows the waterproof sheet 20 to reliably cover the floor 101 and the wall 102 together with the placement member 50.

[0043] In the sheet waterproofing structure 10 configured as described above, as time passes after installation, the plasticizer volatilizes from the waterproof sheet 20 due to exposure to sunlight and rainwater. As a result, the flexibility of the waterproof sheet 20 decreases, and stress may occur in the waterproof sheet 20 due to deterioration of the waterproof sheet 20.

[0044] Therefore, in a sheet waterproofing structure 10 configured as in this embodiment, gaps 55 are formed between adjacent positioning members 50, and because the waterproof sheet 20 is not joined to the positioning members 50, stress generated in the waterproof sheet 20 may cause hemispherical protrusions protruding toward the opposite side of the floor portion 101, or cracks, etc. to form in the waterproof sheet 20, which may result in a concern that the waterproofness of the waterproof sheet 20 may be reduced in the position of the waterproof sheet 20 corresponding to this gap 55.

[0045] Therefore, if the plasticizer that has evaporated into the waterproof sheet 20 can be resupplied to the waterproof sheet 20 at the position corresponding to the gap 55, it is possible to restore excellent flexibility to the waterproof sheet 20. As a result, it is possible to eliminate the generation of stress in the waterproof sheet 20, and it is possible to accurately suppress or prevent the waterproofness of the waterproof sheet 20 from decreasing at the position corresponding to the gap 55.

[0046] Therefore, in the present invention, as shown in Figures 1 to 3, a base protection structure 301 is formed which includes a transition layer 1 and a particle layer 3 for the purpose of supplying plasticizer to the waterproof sheet 20 of the sheet waterproof structure 10 where plasticizer evaporation is observed, i.e., to the waterproof sheet 20 at a position corresponding to the gap 55.

[0047] In this way, by forming the base protection structure 301 on the waterproof sheet 20 at a position corresponding to the gap 55, the plasticizer can be efficiently transferred from the transfer layer 1 provided in this base protection structure 301 to the waterproof sheet 20 at a position corresponding to the gap 55. This makes it possible to restore the flexibility of the waterproof sheet 20. This eliminates the generation of stress in the waterproof sheet 20, and accurately suppresses or prevents the waterproofness of the waterproof sheet 20 from decreasing at the position corresponding to the gap 55.

[0048] This substrate protection structure 301 is composed of a laminate having a transition layer 1 bonded (laminated) onto the waterproof sheet 20 at a position corresponding to the gap 55, and a particle layer 3 laminated on the side of the transition layer 1 opposite the waterproof sheet 20.

[0049] The transition layer 1 is formed using a resin composition for forming a transition layer, which will be described later, and contains a vinyl chloride resin, a plasticizer, and a solvent.As described above, the transition layer 1 is bonded to the waterproof sheet 20 at a position corresponding to the gap 55, so that the plasticizer contained in the transition layer 1 can efficiently migrate to the waterproof sheet 20 serving as the base.

[0050] The vinyl chloride resin content of the constituent materials excluding the solvent in this transfer layer 1 is preferably set to between 1.0 and 25.0% by weight, more preferably between 5.0 and 15.0% by weight, and the plasticizer content of the constituent materials excluding the solvent is preferably set to between 40.0 and 90.0% by weight, more preferably between 50.0 and 80.0% by weight, which allows the plasticizer contained in the transfer layer 1 to migrate efficiently and over a long period of time to the waterproof sheet 20 used as the base.

[0051] Furthermore, the average thickness of the transition layer 1 is preferably 1 mm to 7 mm, and more preferably 3 mm to 5 mm. This ensures that the transition layer 1 functions as a layer that transfers the plasticizer to the waterproof sheet 20 as a base, and that application workability is ensured. Note that the average thickness of this transition layer 1 refers to the average thickness immediately after it is formed using the transition layer-forming resin composition. The thickness of the transition layer 1 will decrease as the plasticizer migrates to the waterproof sheet 20. However, if the thickness of the transition layer 1 immediately after its formation is 1, the thickness of the transition layer 1 after the plasticizer migrates to the waterproof sheet 20 is preferably 0.5 or greater. This effectively suppresses or prevents changes in the appearance of the substrate protection structure 301 that occur as the transition layer 1 thins, i.e., as the transition layer 1 shrinks.

[0052] 3, the particle layer 3 has a plurality of particles 31, which are spread out to form a single layer. That is, the plurality of particles 31 are arranged side by side in the surface direction in a planar shape without overlapping in the thickness direction.

[0053] The particle layer 3 having such a configuration is laminated on the transition layer 1 so as to cover the transition layer 1. Therefore, in the base protective structure 301, the particle layer 3, in which the particles 31 are laid out in a single layer, is exposed as the outermost layer. Here, if the transition layer 1, for example, containing a high content of plasticizer, is exposed as the outermost layer, the plasticizer may leak onto the surface of the transition layer 1 relatively early, causing stickiness on the surface and various problems resulting from the stickiness on the surface. However, in the present invention, the particle layer 3 is formed so as to cover the transition layer 1 and be exposed as the outermost layer. As a result, the plasticizer leaking onto the surface of the transition layer 1 is absorbed by the particle layer 3, and the particle layer 3 is exposed as the outermost layer in the base protective structure 301, thereby accurately suppressing or preventing the leakage of the plasticizer on the surface of the outermost layer. Therefore, the occurrence of stickiness in the outermost layer of the base protective structure 301 can be accurately suppressed or prevented over a long period of time.

[0054] In this specification, when particles 31 are laid out in a single layer in the particle layer 3, this means that multiple particles 31 are arranged in a flat plane along the surface direction without overlapping in the thickness direction. However, this is not limited to this state, and it is acceptable for particles to overlap in the thickness direction by two or three particles, covering a total area of ​​more than 0% to 3% of the entire surface of the transition layer 1, preferably more than 0% to 1%.

[0055] In addition, in particle layer 3, it is preferable that the entire surface of transition layer 1 is covered with particles 31. However, when particle layer 3 is viewed in a planar manner, it can also be said that transition layer 1 is covered by particle layer 3 when transition layer 1 is exposed between multiple particles 31, covering a total of more than 0% to 3% of the entire surface of transition layer 1, preferably a total of more than 0% to 1%.

[0056] The particles 31 may be inorganic particles containing at least one of silica, alumina, titanium white, aluminum hydroxide, zeolite, talc, clay, mica, smectite, vermiculite, glass, etc., or organic particles composed of a resin material containing at least one of acrylic resin, polyolefin resin, polystyrene resin, polyurethane resin, silicone resin, polyester resin, fluorine-containing resin, and copolymers thereof, or plant-derived organic matter, but inorganic particles are preferred. By using inorganic particles for the particles 31, the weather resistance of the particles 31 and, by extension, the particle layer 3 can be improved compared to when the particles 31 are made of organic particles.

[0057] Furthermore, when particles 31 are composed of inorganic particles, they are preferably talc particles. This effectively suppresses or prevents changes in the color tone of transition layer 1 visible through particle layer 3, which would otherwise occur when particle layer 3 is provided as a coating layer that covers transition layer 1. In other words, particle layer 3 can be formed as a transparent layer that covers transition layer 1.

[0058] The particles 31 may have any shape, such as scale-like, flat, plate-like, granular, spherical, fibrous, needle-like, or spindle-like, but are preferably scaly or plate-like. This allows the particles 31 to cover almost the entire surface of the transfer layer 1 with a relatively small amount of particles 31 while accurately preventing the particles 31 from becoming too thick.

[0059] Furthermore, the average particle size of particles 31 is preferably 0.6 μm or more and 40.0 μm or less, more preferably 5.0 μm or more and 20.0 μm or less, and even more preferably 7.0 μm or more and 17.0 μm or less. This ensures that the plasticizer leaking to the surface of transition layer 1 is reliably absorbed by particle layer 3, while accurately suppressing or preventing leakage of plasticizer at the surface of particle layer 3 as the outermost layer. Furthermore, when particles 31 are composed of talc particles, changes in the color tone of transition layer 1 visible through particle layer 3 can be more accurately suppressed or prevented. Note that when particles 31 are not spherical, the particle size refers to the maximum width of particles 31.

[0060] The base protection structure 301 having such a configuration, which is a laminate having a transition layer 1 and a particle layer 3, can be formed, for example, as follows using a base protection structure forming set having a transition layer forming resin composition used to form the transition layer 1 and a plurality of particles used to form the particle layer 3.

[0061] That is, the base protective structure 301 can be formed through a coating film formation process in which a transition layer-forming resin composition is applied to the base at least at positions corresponding to the gaps 55 to form a coating film, a particle layer formation process in which a plurality of particles are laid out in a single layer on the coating film to form particle layer 3, and a transition layer formation process in which the coating film is dried to form transition layer 1. The base protective structure 301 can be formed through the relatively simple process of going through the transition layer formation process and the particle layer formation process as described above.

[0062] The resin composition for forming the transition layer used to form the base protection structure 301 for the sheet waterproofing structure 10 will be described below.

[0063] <Resin composition for forming transition layer> The resin composition for forming a transition layer is used to form the transition layer 1 that allows the plasticizer to migrate to the waterproof sheet 20, and contains a vinyl chloride resin, a plasticizer, and a solvent.

[0064] The resin composition for forming the transition layer has a solubility parameter (SP value) of A [(cal / cm 3 ) 1 / 2 ], and the solubility parameter of the solvent contained in the resin composition for forming the transition layer is B [(cal / cm 3 ) 1 / 2 ], the absolute value of the difference |AB| preferably satisfies the relationship |AB|≦2.0.

[0065] By setting the absolute value |AB| of the difference between the solubility parameter A of the vinyl chloride resin and the solubility parameter B of the solvent within the above range, the vinyl chloride resin can be dissolved in the solvent with excellent solubility. Therefore, the resin composition for forming a transition layer can be made creamy (paste-like). Therefore, by applying the resin composition for forming a transition layer to the waterproof sheet 20 and then drying it, the transition layer 1 can be reliably formed on the waterproof sheet 20 at the position corresponding to the gap 55. Furthermore, the plasticizer contained in the resin composition for forming a transition layer can be efficiently transferred from the transition layer 1 to the waterproof sheet 20, thereby reliably restoring the flexibility of the waterproof sheet 20.

[0066] The solubility parameter (SP value) in this specification represents the Hansen solubility parameter, which is obtained by dividing the solubility parameter introduced by Hildebrand into three components: a dispersion term δD, a polar term δP, and a hydrogen bonding term δH, and expressing them in a three-dimensional space.

[0067] The dispersion term δD represents the effect of dispersion forces, the polar term δP represents the effect of dipole-dipole forces, and the hydrogen bond term δH represents the effect of hydrogen bond forces. δD: Energy derived from intermolecular dispersion forces δP: Energy derived from intermolecular polar forces δH: Energy derived from intermolecular hydrogen bonding forces (Note that the units are MPa.) 0.5 ).

[0068] The following relationship is observed between Hildebrand's SP value and Hansen's HSP.

[0069] Hildebrand's SP 2 =δD 2 +δP 2 +δH 2

[0070] The definition and calculation of HSP are described in Hansen Solubility Parameters: A Users Handbook by Charles M. Hansen (CRC Press, 2007).

[0071] Here, the dispersion term reflects van der Waals forces, the polar term reflects dipole moments, and the hydrogen bond term reflects the effects of water, alcohol, etc. Also, substances with similar HSP vectors can be judged to have high solubility.

[0072] The HSP distance (Ra) can be calculated, for example, by the following formula, when the HSP of the solute (vinyl chloride resin) is (δD1, δP1, δH1) and the HSP of the solvent is (δD2, δP2, δH2).

[0073] HSP distance (Ra)= {4×(δD1-δD2) 2 +(δP1-δP2) 2 +(δH1-δH2) 2} 0.5

[0074] In addition, the Hansen HSP of a mixed solvent can be calculated using the following formula, using the volume as the mixing ratio.

[0075] [δDm,δPm,δHm]= [(a×(δD1+b×δD2),(a×(δP1+b×δP2),(a×(δH1+b×δH2)] / (a+b)

[0076] The various constituent materials contained in the resin composition for forming the transition layer, which has such a configuration, will be described below. As described above, the resin composition for forming the transition layer contains a vinyl chloride resin, a plasticizer, and a solvent.

[0077] (a) Vinyl chloride resin The vinyl chloride resin is contained in the resin composition for forming the transition layer as the main material of the resin composition for forming the transition layer so that when the resin composition for forming the transition layer is applied to the waterproof sheet 20 and then dried, the dried product, i.e., the transition layer 1, will be layer-shaped.

[0078] The vinyl chloride resin may be any polymer containing vinyl chloride, i.e., an oligomer, prepolymer, or polymer. Examples include a monomeric polymer of vinyl chloride, a copolymer of vinyl chloride with vinyl acetate, ethylene, or propylene, or a mixture of two or more of these polymers. Using these vinyl chloride resins ensures that the plasticizer contained in the transition layer 1 formed using the transition layer-forming resin composition can be reliably transferred to the waterproof sheet 20. Furthermore, vinyl chloride-vinyl acetate copolymers are particularly preferred. This improves the solubility of the vinyl chloride resin in the transition layer-forming resin composition and increases the viscosity of the vinyl chloride resin. Furthermore, it improves the retention of the plasticizer in the resulting transition layer 1.

[0079] This vinyl chloride resin has a solubility parameter A of 9.0 (cal / cm 3 ) 1 / 2 More than 11.0(cal / cm 3 ) 1 / 2 It is preferable that the calorie content is 9.5 (cal / cm 3 ) 1 / 2More than 10.5(cal / cm 3 ) 1 / 2 It is more preferable that |AB| is equal to or less than 2.0. This makes it relatively easy to set the absolute value of the difference |AB| so that it satisfies the relationship |AB|≦2.0.

[0080] Furthermore, the content of vinyl chloride resin in the resin composition for forming a transition layer is preferably 3% by weight or more and 20% by weight or less, and more preferably 5% by weight or more and 10% by weight or less. By setting the content of vinyl chloride resin within this range, the layered transition layer 1 can be reliably formed using the resin composition for forming a transition layer. Furthermore, the plasticizer contained in the transition layer 1 can be reliably migrated from the transition layer 1 formed using the resin composition for forming a transition layer to the waterproof sheet 20 side.

[0081] (b) Plasticizer The plasticizer is contained as a substance that migrates from the transition layer 1 formed by applying the resin composition for forming the transition layer to the waterproof sheet 20 and then drying it, to the waterproof sheet 20.

[0082] The plasticizer is not particularly limited, but examples thereof include phthalate ester plasticizers such as DOP (dioctyl phthalate), DBP (dibutyl phthalate), DIBP (diisobutyl phthalate), DINP (diisononyl phthalate), DHP (diheptyl phthalate), and dialkyl (C9-C11) phthalates; aliphatic dibasic acid ester plasticizers such as DOA (di-2-ethylhexyl adipate), DIDA (diisodecyl adipate), and DOS (di-2-ethylhexyl sebacate); aromatic carboxylic acid ester plasticizers such as ethylene glycol benzoates; trimellitic acid ester plasticizers such as TOTM (trioctyl trimellitate); ethylene-vinyl acetate copolymer plasticizers; and polyester plasticizers, and these may be used alone or in combination of two or more. By using these materials as plasticizers, it is possible to reliably improve the flexibility of waterproof sheet 20 that has been reduced when the plasticizer migrates from transfer layer 1 to waterproof sheet 20 .

[0083] The solubility parameter (SP value) of this plasticizer is 8.0 (cal / cm 3 ) 1 / 2 More than 10.0(cal / cm 3 ) 1 / 2 It is preferable that the temperature is 8.5 (cal / cm 3 ) 1 / 2 More than 9.5(cal / cm 3 ) 1 / 2 It is more preferable that the following is satisfied: This allows not only the vinyl chloride resin but also the plasticizer to be dissolved in the solvent with excellent solubility in the resin composition for forming the transition layer.

[0084] The plasticizer content in the resin composition for forming the transition layer is preferably 20% by weight to 65% by weight, and more preferably 30% by weight to 55% by weight. By setting the plasticizer content within this range, the plasticizer can be reliably transferred from the transition layer 1 formed using the resin composition for forming the transition layer to the waterproof sheet 20.

[0085] (c) Solvent The solvent is contained in the resin composition for forming a transition layer to dissolve the vinyl chloride resin, thereby making the resin composition for forming a transition layer creamy (paste-like).

[0086] The solvent is not particularly limited, but examples thereof include hydrocarbon solvents such as n-hexane, toluene, and o-xylene, ketone solvents such as acetone, methyl ethyl ketone (MEK), and cyclohexanone, ester solvents such as ethyl acetate, normal butyl acetate, and isobutyl acetate, ether solvents such as diethyl ether and tetrahydrofuran (THF), and alcohol solvents such as methanol, ethanol, and 1-propanol. One or more of these can be used in combination. By using these solvents, the vinyl chloride resin can be dissolved in the transition layer-forming resin composition, making the transition layer-forming resin composition creamy (paste-like).

[0087] This solvent has a solubility parameter B of 7.5 (cal / cm 3 ) 1 / 2 More than 10.5(cal / cm 3 ) 1 / 2 It is preferable that the temperature is 8.5 (cal / cm 3 ) 1 / 2 More than 9.5(cal / cm 3 ) 1 / 2 It is more preferable that the absolute value of the difference |AB| is set to satisfy the relationship |AB|≦2.0 relatively easily, and the transition layer 1 obtained by drying the transition layer-forming resin composition can be formed to exhibit appropriate adhesion to the waterproof sheet 20.

[0088] The solvent is a mixed solvent, and the solvent having the lowest boiling point is preferably selected to have a boiling point of 60°C or higher, more preferably 65°C or higher, and the solvent having the highest boiling point is preferably selected to have a boiling point of 135°C or lower, more preferably 130°C or lower. This allows the resin composition for forming a transition layer to be more reliably creamy before drying, and allows the transition layer 1 obtained by drying the resin composition for forming a transition layer to be formed as one that exhibits excellent adhesion to the waterproof sheet 20.

[0089] Considering the relationship between the solubility parameter B and the boiling points of the mixed solvents as described above, specific combinations of solvents include, for example, a combination of at least one of toluene, ethyl acetate, normal butyl acetate, and isobutyl acetate with at least one of methyl ethyl ketone and tetrahydrofuran, and in consideration of environmental safety, a combination of at least one of ethyl acetate, normal butyl acetate, and isobutyl acetate with tetrahydrofuran is exemplary.

[0090] The solvent content in the resin composition for forming a transition layer is preferably 15% by weight or more and 45% by weight or less, and more preferably 25% by weight or more and 35% by weight or less. By setting the solvent content within this range, the vinyl chloride resin can be dissolved in the resin composition for forming a transition layer. Furthermore, the resin composition for forming a transition layer can be used to reliably form a layered transition layer 1.

[0091] (d) Viscosity modifier The resin composition for forming the transition layer preferably further contains a viscosity modifier in addition to the vinyl chloride resin, plasticizer, and solvent.

[0092] By including a viscosity adjuster in the resin composition for forming the transition layer, the viscosity of the resin composition for forming the transition layer can be set within an appropriate range, ensuring that the resin composition for forming the transition layer is creamy.

[0093] The viscosity modifier is not particularly limited, but examples thereof include titanium oxide, clay, silica, calcium carbonate, barium sulfate, etc., and one or more of these may be used in combination. Of these, calcium carbonate is preferred. This ensures that the viscosity of the resin composition for forming the transition layer is increased.

[0094] The viscosity modifier is preferably particulate and has an average particle size of 0.5 μm to 20 μm, more preferably 0.5 μm to 10 μm, inclusive. By setting the average particle size within this range, the dispersibility of the viscosity modifier in the resin composition for forming the transition layer can be improved.

[0095] The content of the viscosity modifier in the resin composition for forming a transition layer is preferably 5% by weight or more and 20% by weight or less, and more preferably 10% by weight or more and 15% by weight or less. By setting the content of the viscosity modifier within this range, the viscosity of the resin composition for forming a transition layer can be set relatively easily within an appropriate range.

[0096] Furthermore, in addition to the above-mentioned constituent materials, stabilizers, stabilizer assistants, ultraviolet absorbers, colorants, lubricants, etc. may be added to the resin composition for forming the transition layer.

[0097] Examples of stabilizers include zinc glycine, and examples of stabilizing aids in this case include organic phosphate esters such as tricresyl phosphate (TCP), trixylyl phosphate (TXP), tributyl phosphate (TBP), tri-2-ethylhexyl phosphate, and 2-ethylhexyl diphenyl phosphate.

[0098] In such a resin composition for forming a transition layer, the absolute value |AB| of the difference between the solubility parameter A of the vinyl chloride resin and the solubility parameter B of the solvent preferably satisfies the relationship |AB|≦2.0, and more preferably the relationship 1.0≦|AB|≦1.5. This allows the vinyl chloride resin to be dissolved in the solvent with better solubility, resulting in a resin composition for forming a transition layer with a more creamy consistency. Furthermore, because the difference between the solubility parameter A of the vinyl chloride resin and the solubility parameter B of the solvent is not too small, it becomes relatively easy to peel the transition layer 1 from the waterproof sheet 20.

[0099] Furthermore, when the resin composition for forming the transition layer is cream-like, the viscosity of the resin composition for forming the transition layer at 23°C is preferably 5,000 mPa or more and 20,000 mPa or less, and more preferably 10,000 mPa or more and 15,000 mPa or less. This makes it relatively easy to supply the resin composition for forming the transition layer to waterproof sheet 20, and allows transition layer 1 with a more uniform thickness to be formed on waterproof sheet 20 at positions corresponding to gaps 55.

[0100] Although the base protection structure, the frame covering structure, and the set for forming the base protection structure of the present invention have been described above, the present invention is not limited to these.

[0101] For example, in the substrate protection structure and the frame covering structure of the present invention, each component can be replaced with any component that can exert a similar function, or any component can be added. [Example]

[0102] Next, specific examples of the present invention will be described. However, the present invention is not limited to the descriptions in these examples.

[0103] 1. Raw material preparation First, the raw materials used to form the underlevel protection structure are listed below.

[0104] (Vinyl chloride resin) As a vinyl chloride resin, a vinyl chloride-vinyl acetate copolymer (manufactured by Tosoh Corporation, "Ryuron Best 952", SP value: 10.4 (cal / cm 3 ) 1 / 2 ) was prepared.

[0105] (plasticizer) As a plasticizer, DINP (manufactured by J-Plus, SP value: 8.9 (cal / cm 3 ) 1 / 2 ) was prepared.

[0106] (solvent) As a solvent, ethyl acetate (manufactured by Showa Denko K.K., boiling point: 77°C, SP value: 9.1 (cal / cm 3 ) 1 / 2 ), n-butyl acetate (KH Neochem, boiling point: 126°C, SP value: 8.5 (cal / cm 3 ) 1 / 2 ), isobutyl acetate (KH Neochem, boiling point: 118°C, SP value: 8.3 (cal / cm 3 ) 1 / 2 ), THF (Mitsubishi Chemical Corporation, boiling point: 66°C, SP value: 9.5 (cal / cm 3 ) 1 / 2 ) was prepared.

[0107] (Viscosity modifier) As a viscosity adjuster, calcium carbonate (manufactured by Bihoku Funka Kogyo Co., Ltd., "Softon 2200", average particle size: 1 μm) was prepared.

[0108] (stabilizer) As the stabilizer, a Ca-Zn liquid stabilizer (manufactured by ADEKA Corporation, "SC-32") was prepared.

[0109] (coloring agent) Titanium oxide (manufactured by Ishihara Sangyo Kaisha, Ltd., "R-680") and carbon black (manufactured by Mitsubishi Chemical Corporation, "Mitsubishi Carbon Black #45") were prepared as colorants.

[0110] (particle) As particles 31, talc particles (manufactured by Nippon Talc Co., Ltd., "MS-P", particle size: 14 μm, particle shape: flaky), talc particles (manufactured by Fuji Talc Co., Ltd., "RL217", particle size: 20 μm, particle shape: flaky), talc particles (manufactured by Nippon Talc Co., Ltd., "SG-2000", particle size: 0.85 μm, particle shape: flaky), and Nikkalico particles (manufactured by Nikka Co., Ltd., "AS-100", particle size: 16 μm, particle shape: spherical, main material: plant-derived organic matter) were prepared.

[0111] 2. Preparation of Resin Composition for Forming the Transition Layer First, a resin composition for forming a transition layer was prepared by uniformly mixing vinyl chloride-vinyl acetate copolymer (6.0 wt%) as a vinyl chloride resin, DINP (50.0 wt%) as a plasticizer, calcium carbonate (9.0 wt%) as a viscosity modifier, n-butyl acetate (14.0 wt%) and THF (14.0 wt%) as solvents, the stabilizer (6.0 wt%), and the colorant (1.0 wt%) in a mixer at 25°C.

[0112] The viscosity of the resin composition for forming the transition layer at 23° C. was measured using a rotational viscometer (manufactured by Tokimec Inc., "B-type viscometer BH type") at a rotation speed of 20 rpm.

[0113] 3. Formation of base protection structure 301 on waterproof sheet 20 Example 1 A base protection structure 301 was formed on the waterproof sheet 20 using a resin composition for forming a transition layer and particles 31 (talc, 14 μm).

[0114] More specifically, a waterproof sheet 20 was prepared, and a resin composition for forming a transition layer was applied to the waterproof sheet 20 to form a coating film covering the waterproof sheet 20 .

[0115] Next, a plurality of particles 31 were spread on the coating film in a single layer to form a particle layer 3 .

[0116] Next, the coating film was dried to form a transfer layer 1 having an average thickness of 2 mm, thereby obtaining a base protection structure 301 of Example 1 formed on a waterproof sheet 20.

[0117] The waterproof sheet 20 used contained 60 parts by weight of plasticizer for 100 parts by weight of vinyl chloride resin.

[0118] Examples 2 to 4 The base protection structures 301 of Examples 2 to 4 were obtained in the same manner as in Example 1, except that the raw materials used in preparing the resin composition for forming the transition layer and their contents were changed as shown in Table 1, and the particles 31 used in forming the particle layer 3 were changed as shown in Table 1.

[0119] (Comparative Example 1) An underlayer protection structure 301 of Comparative Example 1 was obtained in the same manner as in Example 1, except that the formation of the particulate layer 3 was omitted.

[0120] 4. Evaluation The base protection structures 301 formed on the waterproof sheet 20 of each of the examples and comparative examples were evaluated using the following method.

[0121] <Change in color tone of transition layer 1 due to formation of particle layer 3> For the base protection structure 301 of each example formed on the waterproof sheet 20, the change in color tone of the transition layer 1 due to the formation of the particulate layer 3 was visually observed, and the degree of change was compared with that of the transition layer 1 in Comparative Example 1 and evaluated based on the evaluation criteria shown below.

[0122] [Evaluation criteria] Compared to the transition layer 1 in Comparative Example 1, the change in color tone ◎: Not accepted ○: Somewhat noticeable, but not enough to cause discomfort ×: Clearly recognized

[0123] <Effect of reducing stickiness on the outermost surface of the base protection structure 301> For the base protection structures 301 of each of the examples and comparative examples formed on the waterproof sheet 20, the surface of the particulate layer 3, i.e., the outermost surface of the base protection structure 301, was visually observed 60 days after the formation of the particulate layer 3 to determine whether or not stickiness had occurred, and the stickiness reduction effect was evaluated based on the evaluation criteria shown below.

[0124] During the 60 days following the formation of the particulate layer 3, the base protective structures 301 of the examples and comparative examples were exposed outdoors from July to August.

[0125] [Evaluation criteria] The occurrence of stickiness on the surface of the particle layer 3 ◎: Not accepted ○: Some stickiness is observed, but it cannot be said that any problems are occurring due to stickiness. ×: Clearly observed, problems due to stickiness occur The evaluation results obtained in the above manner are shown in Table 1.

[0126] [Table 1]

[0127] As shown in Table 1, in each example, the transition layer 1 was covered with a particle layer 3 in which particles were laid out in a single layer, and as a result, the occurrence of stickiness on the surface of the particle layer 3, i.e., the outermost surface of the base protection structure 301, was effectively suppressed or prevented.

[0128] In contrast, in the comparative example, the formation of the particle layer 3 on the transitional layer 1 was omitted, and as a result, the surface of the transitional layer 1, that is, the outermost surface of the base protection structure 301, became sticky. [Explanation of symbols]

[0129] 1. Transition Layer 3 particle layer 10 Sheet waterproof structure 20. Tarpaulin 31 particles 50 Placement components 51 Bottom 52 Rising surface 55 Gap 100 skeleton 101 Floor section 102 Wall section 103 Boundary 301 Base protection structure 500 Body covering structure

Claims

1. A base protection structure comprising a transition layer that covers at least a portion of a base that covers a body having a floor portion, and a particle layer laminated on the transition layer, the transfer layer contains a vinyl chloride resin, a plasticizer, and a solvent, and is configured to transfer the plasticizer to the substrate; The particle layer has a plurality of particles, the particles being spread out to form a single layer.

2. The underlevel protection structure according to claim 1 , wherein the particles are inorganic particles.

3. The substrate protection structure according to claim 2 , wherein the inorganic particles are talc particles.

4. 4. The underlayer protection structure according to claim 2, wherein the inorganic particles are flaky or plate-like.

5. 5. The underlayer protection structure according to claim 1, wherein the particles have an average particle size of 0.6 μm or more and 40.0 μm or less.

6. 6. The substrate protection structure according to claim 1, wherein the substrate is a waterproof sheet.

7. A body covering structure comprising the base protection structure according to any one of claims 1 to 6 and the base.

8. a transition layer covering at least a portion of a base covering a body having a floor portion; a particle layer having a plurality of particles laid out in a single layer, a set for forming an underlayer protective structure, the set including a resin composition for forming a transition layer used to form the transition layer and a plurality of the particles used to form the particle layer, a resin composition for forming a transition layer, the resin composition including a vinyl chloride resin, a plasticizer, and a solvent, is applied to at least a portion of the base to form a coating film; The set for forming a base protection structure is characterized in that it is configured so that the particle layer is formed by laying a plurality of the particles in a single layer on the coating film, and then the coating film is dried to form the transition layer.

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