JP2016160720A - Thermoplastic synthetic resin sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermoplastic synthetic resin sheet, which prevents uplift of an end marginal part due to insufficient adhesivity and aging deterioration and effectively prevents air from jamming by improving workability when laying and adhering the sheet.SOLUTION: A thermoplastic synthetic resin sheet S is a flexible strip and adhered to a floor surface F. An end marginal part ET of the sheet S curves toward an adhered surface F. As the end marginal part ET of the sheet S curves toward the floor surface F, the sheet keeps inner stress to press the tip of the sheet toward the floor surface F. Thus, even if the end marginal part ET is almost detached from the floor face F, a force to press the tip of the end marginal part ET toward the floor surface F is actuated by the inner stress so that uplift of the end marginal part ET of the sheet S, which causes disfigurement of the floor surface F or poses a tripping hazard, is prevented.SELECTED DRAWING: Figure 1

Description

The present invention relates to a thermoplastic synthetic resin sheet, and more particularly, to a thermoplastic synthetic resin sheet in which an edge portion of a laminated thermoplastic synthetic resin sheet does not float from a floor surface.
The “floor surface” as used herein includes not only a room, a passageway, and a staircase tread surface, but also a place that constitutes a floor or a staircase, such as a stair-up surface, that is not actually passed by people. Is also included.

  Conventionally, it has been widely known that a synthetic resin floor sheet is stuck and laid on a floor surface for the purpose of improving design properties and protecting the floor surface. In addition, the floor surface has been actively improved and modified by sticking and laying a synthetic resin floor sheet with functions such as anti-slip, drainage, and antifouling properties on the floor surface. .

  For example, in Patent Document 1, one surface is an adhesive surface having an adhesive property to which an adhesive building material can easily adhere, and an adhesive layer is provided on the other surface of the wind-shielding long base, and the adhesive surface is provided. An invention relating to a building sheet in which a layer is coated with a release paper that can be easily peeled is disclosed, and an adhesive layer provided on the back side of the sheet teaches that a building sheet is attached and laid on a floor surface. Yes.

  In addition, in Patent Document 2, a floor material in which a back surface layer is laminated and integrated on the back surface of the floor material body, the floor material body contains a polypropylene-based resin containing an inorganic filler, The back layer is a flooring material having a thickness of 0.1 to 0.5 mm in which 100 parts by weight of ethylene-vinyl acetate copolymer resin contains 10 parts by weight or less of rosin and 200 to 600 parts by weight of an inorganic filler. Such an invention is disclosed, and it is described in detail that a floor material is stuck and laid on a floor surface using an adhesive.

  As in the above Patent Documents 1 and 2, the synthetic resin floor sheet is attached and laid on the floor surface using a pressure-sensitive adhesive, an adhesive, a double-sided pressure-sensitive adhesive sheet, and the like, thereby improving the design. Or protecting the floor. In addition, the floor surface is improved and modified by providing functions such as anti-slip property, drainage property, and antifouling property.

Japanese Patent Laid-Open No. 08-189163 Japanese Patent Laid-Open No. 07-195629

  However, as in Patent Documents 1 and 2, when a floor sheet is attached and laid on the floor surface using a pressure-sensitive adhesive or an adhesive (hereinafter referred to collectively as an adhesive unless otherwise specified), The edge of the floor sheet may peel from the floor surface due to insufficient adhesive force of the adhesive or deterioration over time. When the edge of the floor sheet is lifted from the floor surface in this way, not only the beauty is impaired, but also it is very dangerous, such as creeping while walking. Also, during the work of laying and attaching a floor sheet to the floor surface, air is caught between the floor sheet and the floor surface, so that the surface of the floor sheet rises, a so-called `` swelling '' phenomenon occurs, and the above A similar problem sometimes occurred.

  The present invention has been made in view of the above problems, and the problem to be solved is to prevent the lifting of the edge due to insufficient adhesive force of the adhesive or deterioration over time, and to improve the workability at the time of attaching and laying. An object of the present invention is to provide a sheet made of thermoplastic synthetic resin which is improved and effectively prevents air from being caught.

  In order to achieve the above object, a thermoplastic synthetic resin sheet according to the present invention is a flexible strip-shaped thermoplastic synthetic resin sheet that is laid and laid on a floor surface, and the edge of the sheet. The portion is curved toward the adherend surface side.

  In the thermoplastic synthetic resin sheet of the present invention, it is preferable that the edge of the thermoplastic synthetic resin sheet is curved over the entire circumference of the sheet, and the thermoplastic synthetic resin sheet is More preferably, it is curved more in the longitudinal direction than in the lateral direction. In such a thermoplastic synthetic resin sheet, it is preferable that an adhesive layer is formed on the adherend surface side of the thermoplastic synthetic resin sheet.

  The thermoplastic synthetic resin sheet of the present invention (hereinafter simply referred to as “sheet”) has a sheet edge even when the adhesive force of the adhesive agent is insufficient or the adhesive force of the adhesive agent decreases due to deterioration over time. Edge peeling (floating from the floor) can be effectively prevented. That is, the present invention is a strip-shaped thermoplastic synthetic resin sheet having flexibility in which the edge portion is curved toward the adherend surface side, and the stress to be curved at the edge portion is applied to the adhesive agent. Since it is very small compared to the adhesion force, the sheet is usually laid substantially flat without lifting the edge of the sheet when it is stuck and laid on the floor. On the other hand, even if the sticking force of the sticking agent is insufficient or decreases due to aging deterioration, a central region (a central region means a region inside the edge portion) occupying most of the sheet. By exerting a sufficient adhesion force, a force that attracts the sheet edge to the floor surface (attached surface) acts, so that the sheet edge does not lift from the floor. This will be described in more detail. In the present invention, since the sheet edge is curved toward the adherend surface (floor surface), the sheet edge will try to press the tip of the sheet against the adherend. Holds internal stress. Since this internal stress is retained, even if the adhesive force of the adhesive is reduced due to deterioration over time and the edge of the sheet starts to peel off from the floor surface, the internal stress acts on the sheet. The force which presses the front-end | tip of an edge part to a to-be-coated surface side acts. Therefore, the seat edge does not rise from the floor surface, and the gap with the floor surface does not widen, so that there is no concern that the aesthetic appearance of the floor surface is impaired or that the floor is crawled as in the prior art. In addition, since the sheet edge is curved in an arc shape, the force to be pressed against the adherend surface is dispersed and acts on the sheet edge in the arc curved range. There is no partial large gap between the floor and a phenomenon similar to so-called “bulging”. As described above, the present invention does not cause a gap between the sheet edge and the floor surface, so that ultraviolet rays, water, and the like that cause deterioration are difficult to enter from the gap, and further progress of deterioration of the adhesive agent is caused. It can also be prevented.

  Further, the thermoplastic synthetic resin sheet in which the edge portion of the thermoplastic synthetic resin sheet is curved over the entire circumference of the sheet is provided by providing the curved portion over the entire circumference of the sheet. Even if the above-mentioned effects are exerted over the entire circumference of the sheet and the sheet is stuck and laid on the floor independently without being joined to other sheets, the edge of the sheet is lifted or the sheet and the floor are There is no problem that air is caught in between.

  At that time, if the thermoplastic synthetic resin sheet is greatly curved in the longitudinal direction rather than the lateral direction, the effect of the present invention as described above is further emphasized. That is, the sheet of the present invention has a longer center region in the longitudinal direction than the center region in the short direction, and therefore presses (holds) the sheet against the adherend against the repulsive force of the edge portion. Even if the adhering area is large and the end edge in the longitudinal direction is greatly curved, the sheet can be sufficiently adhered and held on the adherend surface side, so that the above effect can be further enhanced. On the other hand, since the length of the central region is shorter in the short direction than in the longitudinal direction, the force to press the sheet edge by the sticking force of the central region against the adherend side is small. Therefore, if this short direction is curved to the same extent or greatly as the longitudinal direction, there will be a difference in the sticking force in the longitudinal direction and the short direction, the balance of the sticking force as the whole sheet will be lost, and the sheet edge will be There is a risk of floating or air entrainment. In order to prevent such an imbalance of the sticking force, the present invention maintains the balance of the sticking force as a whole sheet by dispersing and balancing the sticking force by curving the longitudinal direction to be larger than the lateral direction. Thus, the problem that the sheet edge is partially lifted or air is caught is prevented.

In the thermoplastic synthetic resin sheet having the effects as described above, if the adhesive layer is previously formed on the surface to be adhered, the adhesive layer is covered with a release layer or the like. By peeling off the release layer, the sheet can be immediately attached and laid on the floor surface, and the sheet can be easily stored and transported. In addition, normally, if the adhesive layer is formed on the surface to be adhered, it is difficult to align the sheet, but the present invention is aligned because the edge of the sheet is curved. In this stage, a gap is generated between the edge portion of the sheet and the floor surface, so that the entire adhesive layer does not come into contact with the floor surface as the adherend surface. Therefore, the sheet can be easily aligned, and even when the sheet position is not appropriate and the sheet is to be shifted slightly, the sheet can be easily shifted and aligned.
Needless to say, once the position where the sheet is adhered and laid is completely determined, the entire sheet is pressed against the surface to be adhered, so that the gap is completely eliminated and the sheet is adhered and laid.

It is sectional drawing of the state before sticking and laying the thermoplastic synthetic resin sheet which concerns on one Embodiment of this invention on a to-be-adhered surface. It is sectional drawing of the state which stuck and laid the sheet | seat on the to-be-adhered surface. It is sectional drawing of the state from which the edge part of the sheet is likely to peel from the adherend surface. It is explanatory drawing which shows the test method of the sheet.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  The thermoplastic synthetic resin sheet S (hereinafter simply referred to as sheet S) of the present invention shown in FIG. 1 has functions such as improvement in design properties, protection of the floor surface F, and anti-slip properties, drainage properties, and antifouling properties. Is intended to be applied to the floor F of a condominium, a low-rise apartment, or the like.

  As described above, the “floor surface F” on which the sheet S is attached and laid includes, for example, apartments and low-rise apartments, passages, stair treads, etc. Included are places that make up floors and stairs, although people actually do not pass. The floor surface F may be not only a general concrete floor surface but also a mortar finish floor surface, a slate floor surface, etc. In addition, urethane waterproof material, FRP waterproof material, polymer cement waterproof material, metal base (stainless steel) , Aluminum, brass, galvanized), stone, wood, coated floor, etc.

The sheet S adhered to the floor surface F is a strip-shaped sheet formed of a thermoplastic synthetic resin having flexibility, and as shown in FIG. 1, the upper layer 1, the lower layer 2, The intermediate layer 3 interposed between the upper layer 1 and the underlayer 2 and the adhesive layer 4 formed on the back surface (the adherend surface F side) of the underlayer 2, the edge ET of the It is curved in an arc shape toward the floor surface F, which is the landing surface. The size of the sheet S may be appropriately changed according to the size of the floor surface F to be attached and laid, but the length in the longitudinal direction is approximately 300 to 2400 mm, and the length in the short direction. Is about 30 to 900 mm, and the ratio of the length dimension in the longitudinal direction to the length dimension in the lateral direction is preferably about 1.1: 1 to 80: 1. Further, the thickness thereof is appropriately changed in relation to the flexibility described below, and is not particularly limited. Usually, a thickness of about 1 to 5 mm is used. A sheet S of about 2 mm is preferably used.
Note that the edge portion ET of the sheet S refers not only to the edge (tip) of the sheet S but also to a region that enters from about 10 to 100 mm from there. Further, the end edge portion ET is curved in an arc shape, in addition to the end edge portion ET being curved while drawing a constant radius of curvature, as well as arcs having different curvature radii. The case where it curves by combining two or more is also included.

Here, the “flexibility” of the sheet S means that the curved edge portion ET of the sheet S is deformed flatly by hand (the state shown in FIG. 2), and the entire surface of the sheet S can be easily adhered. (Floor surface F), and the reaction force of the sheet S (edge portion ET) (the force to return to the curved original shape) is usually applied to the adhesive used for laying work. It refers to a range that does not cause defects such as peeling over the entire surface or part of the adherend surface F beyond the range of adhesion force. Specifically, the 10% modulus of the sheet S is 250 to 600 N / mm ^2. Those adjusted to the above range are preferred. As will be described later, when the 10% modulus is within the above range, the edge portion ET of the sheet S is formed from the floor surface F to the entire surface or the surface S, although the entire surface of the sheet S can be easily attached and laid on the floor surface F. Problems such as partial peeling do not occur.
Here, the numerical value of 10% modulus is measured at a tensile speed of 100 mm / min using a specimen molded in the shape of dumbbell No. 1 having a thickness of 2 mm according to JIS K 6251.

  The sheet S of the present embodiment realizes the above flexibility by being molded with a thermoplastic synthetic resin such as a vinyl chloride resin, a polyolefin resin, a vinyl acetate resin, an ethylene-vinyl acetate copolymer, or the like. However, as long as the flexibility required for the sheet S can be realized, the material of the sheet S is not limited to the above-described thermoplastic synthetic resin. In addition, the sheet S may be a single layer or may omit the intermediate layer 3 or the adhesive layer 4, but taking into consideration the maintenance force that keeps the curved shape of the edge ET constant, etc. As in this embodiment, the intermediate layer 1 is composed of an upper layer 1 and an underlayer 2, and an intermediate using a woven or non-woven fabric such as glass fiber or synthetic resin fiber between the upper layer 1 and the underlayer 2. It is preferable to interpose layer 3.

  The edge portion ET of the sheet S is curved toward the floor surface F over the entire circumference of the sheet S. That is, the edge portion ET in the longitudinal direction of the sheet S [the upper edge portion and the lower edge portion ET of the sheet S shown in FIG. 4A] is curved toward the floor surface F side as the adherend surface. In addition, the edge portion ET in the short direction of the sheet S [the left edge portion and the right edge portion ET of the sheet S shown in FIG. 4A] is also curved toward the floor surface F side. (The edge portions ET of the four sides of the sheet S are continuously curved). Specifically, the curvature radius is in the range of 500 to 1000 R (unit: mm), and is curved toward the floor surface F side by 0.5 to 30 mm, preferably about 1 to 20 mm.

  As described above, various means for bending the edge portion ET of the sheet S to the floor surface F side are conceivable and are not particularly limited. However, as in the present embodiment, the sheet S is When the upper layer 1 and the lower layer 2 are formed (the intermediate layer 3 may or may not be interposed), for example, the upper layer 1 and the lower layer 2 may have different thicknesses, Both the base layer 1 and the base layer 2 are foamed, or both or one is made to contain a filler (calcium carbonate, talc, etc.), or the upper base layer 1 and the base layer 2 have different resin types, Alternatively, by combining those means, the floor is curved toward the floor surface F while controlling the molding shrinkage caused by thermoforming between them. When the thickness is specifically controlled, the thickness of the base layer 2 may be made larger than the thickness of the upper layer 1 (the thickness of the base layer 2 / the thickness of the upper layer 1 is about 1.05 to 1.6). In the case of controlling by foaming, the foaming ratio of the upper layer 1 is increased (the foaming ratio of the base layer 2 / the foaming ratio of the upper layer 1 is about 0.5 to 0.95. While the upper layer 1 is foamed, the base layer 2 is expanded. (It may be an embodiment that does not foam). In addition, when the filler is included, the content of the filler of the underlayer 2 is small (the filler content of the underlayer 2 / the filler content of the upper layer 1 is about 0.5 to 0.95). What is necessary is just to increase the molding shrinkage of the underlayer 2 (the molding shrinkage of the underlayer 2 / the molding shrinkage of the upper layer 1 is about 2 to 10). By forming the sheet S by such a method, the edge portion ET of the sheet S is curved toward the floor surface F side.

  The sheet S is curved more in the longitudinal direction than in the lateral direction. In other words, the edge portion ET in the shorter direction than the edge portion ET in the longitudinal direction [the edge portion ET of point A shown in FIG. 4A] [the point B shown in FIG. 4A] The curvature radius of the edge portion ET] of the sheet S is small. Specifically, the ratio of the bending amount in the longitudinal direction and the short direction of the sheet S (the bending amount in the longitudinal direction / the bending amount in the short direction). , About 2-4. This is for the following reason.

  That is, since the sheet S of the present invention has a strip shape, the length dimension in the longitudinal direction is longer than the length dimension in the lateral direction as described above. If the length dimension in the longitudinal direction is longer than the short direction, as shown in FIG. 4A (the inside of the imaginary line is the central region CT), it is natural that the longitudinal dimension is longer than the short direction. The length of the central region CT in the direction becomes longer. Since the central region CT is a region that is not curved or is almost curved, even if the longitudinal direction of the sheet S is greatly curved, it is a region where the adhesive force by the adhesive layer 4 is large. Since the edge portion ET [point B shown in FIG. 4B] is securely pressed and stuck to the floor surface F side by the central region CT, there is almost no problem such as lifting.

  On the other hand, since the length of the central region CT is short in the short direction of the sheet S, the sticking force for pressing the edge portion ET of the sheet S against the floor surface F side by the central region CT is compared with the longitudinal direction. And small. Therefore, if the short direction of the sheet S is curved to the same extent as the long direction or greatly curved, a difference occurs in the sticking force in the long direction and the short direction (longitudinal direction> short direction). The balance of the sticking force as a whole is lost, and there is a risk that the air will be lifted or air may be caught in the edge portion ET [A point shown in FIG. 4A] in the longitudinal direction. In order to prevent such an imbalance of the adhering force, the present invention distributes and balances the adhering force by curving the longitudinal direction to be larger than the lateral direction, thereby balancing the adhering force as the sheet S as a whole. Thus, in the end edge portion ET of the entire circumference of the sheet S, problems such as partial lifting and air biting are prevented.

  In the present embodiment, as described above, the central region CT is substantially flat (not curved or hardly curved), and only the edge portions ET on the four sides of the sheet S are curved. However, in the case where the curvature radius of the central region CT is large and the curvature radius on the edge portion ET side is small, or the aspect in which the entire cross section of the sheet S is curved with substantially the same curvature radius is excluded. If at least the edge portion ET of the sheet S is curved toward the floor surface F, it is included in the technical scope of the present invention.

  The sheet S having the above-described configuration is adhered and laid by pressing the adhesive layer 4 formed on the back surface of the base layer 2 against the floor surface F. This adhesive layer 4 is a so-called double-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive, a butyl rubber pressure-sensitive adhesive, or a silicone pressure-sensitive adhesive is attached to both surfaces of a film or sheet, and one side of the adhesive layer 4 is a sheet. While being affixed to the underlayer 2 of S, the other surface is covered with a release layer (not shown) or the like. And the sheet | seat S is stickingly laid by peeling a peeling layer at the time of the operation | work which sticks and laying the sheet | seat S on the floor surface F, and pressing on the floor surface F from the upper direction.

  The sticking layer 4 as described above greatly improves the workability and transportability when sticking and laying the sheet S and facilitates storage, but is not necessarily formed on the back surface of the base layer 2. It is not necessary to be applied, and the adhesive may be applied directly to the back surface of the base layer 2 during work. Adhesives and pressure-sensitive adhesives are mainly used as the adhesive applied to the back surface of the underlayer 2, and when using adhesives as adhesives, urethane moisture-reactive adhesives and epoxy moisture-reactive adhesives are used. Agents, epoxy two-component mixed reaction adhesives, acrylic resin emulsion adhesives, and the like are preferably used. Moreover, when an adhesive is used as the adhesive, an acrylic adhesive, a butyl rubber adhesive, a silicone adhesive, etc. are preferably used.

  The sticking agent is required to have a sticking force (sticking strength) such that the sheet S does not easily peel off from the floor surface F. Specifically, the sticking strength is 20 to 300 N / 50 mm. Is preferred. The adhesive strength of the adhesive was measured in accordance with JIS A 5536 “Adhesive for Floor Finishing Material” 5.3.3 (peeling adhesive strength), and the sheet S was adhered to the slate plate with the adhesive. It was measured by performing a 90 degree peel test with a tensile tester after curing for 2 days after being attached and pasted. As a result, it was found that when the sticking strength of the sticking agent is within the above range, there is no problem such that the sheet S easily peels from the floor surface F.

  The sheet S of the present invention is laid on the floor F by forming the adhesive layer 4 as described above on the back surface or by directly applying the adhesive agent as described above to the back surface of the sheet S. Is done.

As described above, when the sheet S is attached and laid on the floor surface F, as shown in FIG. 2, the sheet S is attached and laid without any gap with the floor surface F in a state where the entire sheet S is flat. At this time, since the 10% modulus of the sheet S is adjusted to the range of 250 to 600 N / mm ² as described above, the entire surface of the sheet S can be easily laid on the floor surface F.

  Further, since the edge portion ET of the sheet S is curved toward the floor surface F side, as shown by the upward arrow in FIG. However, as described above, this reaction force is far smaller than the sticking force (downward arrow in FIG. 2) of the sticking layer 4 (sticking agent). There is no problem such that the sheet S is peeled from the adherend surface F entirely or partially.

  On the other hand, when a considerable amount of time has elapsed since the sheet S was laid, the adhesive force of the adhesive layer 4 (adhesive) is insufficient, or the adhesive force of the adhesive layer 4 decreases due to deterioration over time. As a result, the edge ET of the sheet S may be lifted from the floor surface F and peeled off. However, in the present invention, since the end edge portion ET of the sheet S is curved toward the floor surface F, as shown in FIG. 3, the end edge portion ET has its tip (edge) on the floor surface F side. The internal stress intended to be pressed onto the sheet S is held, and the edge ET of the sheet S is pressed against the floor surface F side by the action of the internal stress. In addition, since the central region CT occupying most of the sheet S exhibits a sufficient adhesion force, a force that attracts the edge portion ET of the sheet S toward the floor surface F also acts, and the adhesion layer is deteriorated due to deterioration over time. Even if the sticking force of No. 4 is reduced, the edge portion ET of the sheet S is not lifted from the floor surface F and peeled off. Further, since the edge portion ET of the sheet S is curved in an arc shape, the force to be pressed against the floor surface F side is dispersed and acts on the edge portion ET in the arc-curved range. In addition, a partial large gap does not occur between the sheet S and the floor surface F, and a phenomenon similar to so-called “bulging” can be prevented. As described above, since the gap between the edge portion ET of the sheet S and the floor surface F does not widen in the present invention, it is difficult for ultraviolet rays, water, and the like that cause deterioration to enter from the gap. The progress of deterioration of the layer 4 can also be prevented, and there is no concern that the aesthetic appearance of the floor surface F is impaired or that the floor 4 is crawled during walking as in the prior art.

  And since the curved edge part ET which has the above effect is formed over the perimeter of the sheet | seat S, this sheet | seat S is independently made into floor surface F, without joining with another sheet | seat. Even if it is stuck and laid, the above-mentioned problems do not occur.

  In order to more reliably prevent the edge portion ET of the sheet S from being lifted, the front end of the sheet S and the floor surface F are sealed with a sealing material, or when the sheet S is joined to another sheet S. The ends of the sheet S may be sealed with a sealing material, or may be welded using a thermoplastic synthetic resin welding rod or the like.

  Next, the effect confirmation test of the sheet S of the present invention will be described.

In this effect confirmation test, a slate plate is used for the floor surface F, and an acrylic double-sided pressure-sensitive adhesive sheet is used for the adhesive layer 4. And as shown in following Table 1, in Experimental Examples 1-5, the change of workability | operativity at the time of sticking laying by the bending amount and the change of the peeling amount from the floor surface F were investigated. That is, the 10% modulus of the sheet S is uniformly set to 350 N / mm ^2, and the workability at the time of sticking and laying by the amount of curvature of the edge portion ET and the amount of peeling from the floor surface F are measured. The amount of bending in the longitudinal direction referred to in Table 1 means that the sheet S is placed on the floor F with the front and back opposite to each other, and as shown in FIGS. The cross section of the portion ET is measured in the direction of the arrow, and the height from the floor surface F to the end (edge) of the edge portion ET of the sheet S is measured. , The height from the floor surface F to the end of the edge S of the sheet S is measured. Further, the amount of peeling from the floor surface F is measured not only immediately after the sheet S is stuck and laid on the floor surface F, but also after an environmental element is added. Here, the environmental element addition is a reproduction of pseudo-aging deterioration by immersing the sheet S and the slate plate in cement saturated water (PH12.5) for one month, from the floor surface F at this time. The amount of peeling of the edge portion ET of the sheet S was measured respectively after the deposition and after the addition of the environmental element. Furthermore, workability at the time of sticking and laying is difficult for a person skilled in the art to stick the sheet S to a predetermined place on the floor surface F at one time. Since the sheet S is temporarily laid once and then the sheet S is shifted to a predetermined position and aligned, the workability at that time was examined.

  Next, in Experimental Example 6, a sheet with a numerical value with a very low 10% modulus was measured, and in Experimental Example 7, a sheet with a numerical value with a very high 10% modulus was measured. We examine the range of flexibility that the present invention can tolerate.

  Looking at the test results shown in Table 1 above, as can be seen from Experimental Example 4, in an embodiment in which the edge portion ET of the sheet S is not curved at all, it is difficult to perform the construction when attaching and laying, and the workability is deteriorated. It was found that the edge ET peeled off from the floor surface 2 mm after the environmental element was added. Further, as in Experimental Example 5, in an aspect different from the present invention in which the edge portion ET is curved in the direction opposite to the floor surface F side, not only the construction of the slip is impossible, but also after the addition of the environmental element, the edge It was found that the part ET was separated from the floor surface F by 5 mm.

  In contrast, in the aspect in which the edge portion ET of the sheet S is curved to the floor surface F side, as shown in Experimental Examples 1 to 3, the edge portion ET of the sheet S is added even after the environmental element is added. No peeling off from the floor surface F, it can be seen that it is possible to perform the construction. From the comparison data between the experimental examples 1 to 3 and the experimental examples 4 and 5, the effect of bending the edge portion ET of the sheet S to the floor surface F side is obvious. Moreover, when the amount of bending in the longitudinal direction is made larger than the amount of bending in the short direction by comparing the experimental examples 1 and 2 and the experimental example 3, the sliding construction becomes easier and the workability at the time of attaching and laying is excellent. I understand that.

  Next, from Experimental Example 6, it was found that if the value of the 10% modulus was too small, it would be difficult to perform the construction, and if an environmental element was added, partial swelling occurred. Furthermore, from Experimental Example 7, when the value of the 10% modulus is too large, the reaction force of the edge portion ET of the sheet S is larger than the adhesion strength of the adhesion layer 4, and the sheet S does not adhere to the central region CT. It turned out that a part and a swelling generate | occur | produce and it becomes difficult to stick and lay sheet S on floor F itself.

From the above experimental results, it is necessary that the edge S of the sheet S bend toward the floor surface F, and it is more preferable that the amount of bending in the longitudinal direction is larger than the amount of bending in the short direction. Recognize. It can also be seen that if the value of the 10% modulus is too large or too small, the workability at the time of sticking and laying deteriorates and problems such as peeling from the floor surface F occur. From the above, the sheet S to be laid and laid on the floor surface F needs to be curved toward the floor surface F, and also in that case, the sheet S is greatly curved in the longitudinal direction than in the lateral direction. Is preferred. In addition, when the 10% modulus of the sheet S is in the range of 250 to 600 N / mm ² , the workability at the time of attaching and laying is extremely good, and the edge portion ET of the sheet S peels from the floor surface F. Therefore, this is the most preferable mode.

S sheet made of thermoplastic synthetic resin 1 upper layer 2 ground layer 3 intermediate layer 4 adhesive layer F surface to be adhered (floor surface)

Claims (4)

  A flexible strip-shaped thermoplastic synthetic resin sheet that is attached and laid on a floor surface, wherein the edge of the sheet is curved toward the adherend side. Plastic synthetic resin sheet.   2. The thermoplastic synthetic resin sheet according to claim 1, wherein an edge of the thermoplastic synthetic resin sheet is curved over the entire circumference of the sheet.   The thermoplastic synthetic resin sheet according to claim 2, wherein the thermoplastic synthetic resin sheet is greatly curved in the longitudinal direction than in the lateral direction.   The thermoplastic synthetic resin sheet according to any one of claims 1 to 3, wherein an adhesive layer is formed on a surface to be adhered of the thermoplastic synthetic resin sheet.

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