JP2018003508A - Floor sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor sheet capable of being easily removed from a floor surface.SOLUTION: A floor sheet A of the present invention includes a sheet body 1, and an adsorption part 2 that is provided on the backside of the sheet body 1 and adsorbed on a floor surface. Flexural rigidity against bending to the front side is higher than flexural rigidity against bending to the backside.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a floor sheet laid on a floor surface.

Conventionally, a sheet-like floor sheet is known as a flooring material. The floor sheet is laid on the floor surface of a new or existing structure.
Usually, the floor sheet is attached to the floor surface using an adhesive or an adhesive, but there is a problem that it is difficult to replace the floor sheet.
Patent Document 1 discloses a vinyl chloride flooring provided with a non-slip layer having self-adsorption on the back surface.
Such a vinyl chloride flooring is provided with a self-adsorptive anti-slip layer, so it can be laid more easily than a flooring that adheres to the floor using an adhesive or adhesive. In addition, no adhesive remains after removal.

By the way, when peeling off the floor material provided with a self-adsorptive anti-slip layer from the floor surface, it raises the edge of the floor material, and the floor material is lifted and sprinkled from here as the starting point. Remove from the floor.
Since the flooring material is not bonded to the floor surface, the floor material and the floor surface are excellent in both separation properties at the interface, but further development of a flooring material that is easy to remove from the floor surface is required. . Particularly, in the case of a sheet-like floor material having a relatively large area, it is difficult to remove it from the floor surface.
Further, the floor sheet after being laid on the floor surface is preferably one that fits well so that the floor sheet does not fall naturally from the end.

JP 2003-136555 A

  An object of the present invention is to provide a floor sheet that can be easily detached from the floor surface.

  The floor sheet of the present invention has a sheet main body and an adsorption portion that is provided on the back surface of the sheet main body and adsorbs to the floor surface, and the bending rigidity toward the front surface side is larger than the bending rigidity toward the back surface side.

As for the preferable floor sheet of this invention, the said adsorption part is formed from the foamed resin.
In a preferred floor sheet of the present invention, the sheet main body has a resin layer containing a soft synthetic resin, and a scratch preventing layer containing a curable resin provided on the surface side of the resin layer.

  Since the floor sheet of the present invention can be easily removed from the floor surface, the replacement work can be easily performed.

The top view of the floor sheet of this invention. The enlarged back view which omitted a part of the floor sheet. FIG. 3 is a schematic enlarged cross-sectional view taken along line III-III in FIG. 1. The schematic expanded sectional view of the floor sheet with a release sheet in which the floor sheet was attached to the release sheet. The reference side view which shows the state which curved the sheet | seat main body to the front and back side. The reference side view which shows the state of the sheet | seat main body in 23 degreeC. The expanded sectional view of the floor sheet which has a sheet body which consists of the layer composition of the 1st example (cutting in the same portion as the III-III line of Drawing 1). The expanded sectional view of the floor sheet which has a sheet body which consists of the layer composition of the 2nd example (cut in the same portion as the III-III line of Drawing 1). The expanded sectional view of the floor sheet which has a sheet body which consists of a layer composition of the 3rd example (cut in the same portion as the III-III line of Drawing 1). The expanded sectional view of the floor sheet which has a sheet body which consists of the layer composition of the 4th example (cutting in the same portion as the III-III line of Drawing 1). The expanded sectional view of the floor sheet which has a sheet body which consists of the layer composition of the 5th example (cut in the same portion as the III-III line of Drawing 1). The top view of a glass nonwoven fabric. The expanded sectional view cut | disconnected by the XIII-XIII line | wire of FIG. The top view of a glass woven fabric. The expanded sectional view cut | disconnected by the XV-XV line | wire of FIG. The detailed expanded sectional view which expanded further a part of floor sheet of FIG. The detailed expanded sectional view which expanded a part of floor sheet of Drawing 10 further. The reference figure explaining the state at the time of removing a floor sheet from a floor surface. The rear view which looked at the floor sheet with a release sheet which concerns on a modification from the back surface side. The schematic expanded sectional view cut | disconnected by the XX-XX line of FIG. The schematic expanded sectional view of the floor sheet with a release sheet which concerns on the further modification. The reference side view which shows the measuring method of the bending rigidity of a floor sheet.

Hereinafter, the present invention will be described with reference to the drawings as appropriate.
In this specification, the “surface” of a certain layer or member refers to the surface far from the floor surface on which the floor sheet is laid, and the “back surface” refers to the opposite side (the side close to the floor surface on which the floor sheet is laid). Refers to the face.
In the present specification, a numerical range represented by “to” means a numerical range including numerical values before and after “to” as a lower limit value and an upper limit value.
In addition, it should be noted that dimensions such as thickness and size in each drawing are different from actual ones.

[Overview of floor sheet]
FIG. 1 is a plan view of the floor sheet, and FIG. 2 is an enlarged rear view of the floor sheet. The plan view is seen from the front side of the floor sheet, and the rear view is seen from the back side. However, in FIG. 2, the left side of the floor sheet is omitted. FIG. 3 is a schematic enlarged cross-sectional view of the floor sheet cut in the thickness direction. In FIG. 3, the layer structure of the sheet body is not shown (the same applies to FIG. 4).
As shown in FIG. 1, the floor sheet A is formed, for example, in a sheet shape having a substantially rectangular shape in plan view. However, the sheet-like floor sheet A may be formed in a substantially square shape in plan view, a substantially hexagonal shape in plan view, and the like (not shown). As specific dimensions of the floor sheet having a substantially rectangular shape or a substantially square shape in plan view, for example, the length L1 in the first direction × the length L2 in the second direction = 100 mm to 2000 mm × 100 mm to 2000 mm, preferably Examples include length L1 in the first direction × length L2 in the second direction = 1000 mm or less × 1000 mm or less.

  The floor sheet A having a substantially rectangular shape in plan view as shown in the example is, for example, a length L1 in the first direction × a length L2 in the second direction = 600 mm to 1500 mm × 100 mm to 300 mm, preferably the first direction. Length L1 × length L2 in the second direction = 700 mm to 1200 mm × 100 mm to 200 mm. The second direction is a direction orthogonal to the first direction. The floor sheet A having a substantially rectangular shape in plan view has a length L1 in the first direction L1: a length L2 in the second direction = 2: 1 to 10: 1, preferably 4: 1 to 8: 1. is there.

In addition, in this invention, the floor sheet A may be formed in planar view elongate strip shape (not shown). In the present specification, the long band shape is a rectangular shape in which the length L1 in the first direction is sufficiently longer than the length L2 in the second direction. For example, the length L1 in the first direction is the second direction. 5 times or more, preferably 10 times or more of the length L2.
As specific dimensions of the long belt-like floor sheet A, the length L2 in the second direction is, for example, 500 mm to 4000 mm, and the length L1 in the first direction is 20 m or more.
The long belt-like floor sheet A is usually cut into a desired shape and used at a construction site.

The floor sheet A of the present invention has flexibility. As the degree of flexibility of the floor sheet A, for example, the floor sheet A can be wound around a core having a diameter of 10 cm in a roll shape with the back surface side of the floor sheet A facing the core.
The sheet-like floor sheet A as shown in the illustrated example is stored and transported in a state where a plurality of the floor sheets A are overlapped or individually wound in a roll shape. Further, the long belt-like floor sheet A is usually stored and transported in a rolled state. However, when the floor sheet A is formed in a roll shape, it may be wound around a desired winding core (this winding core is not limited to one having a diameter of 10 cm), or the floor sheet A may be used without using a winding core. Only a roll may be wound.
The total thickness of the floor sheet A is not particularly limited, and is, for example, 1 mm to 5 mm, and preferably 1.5 mm to 3 mm. When the thickness of the floor sheet A is too small, the floor sheet A tends to be soft, and when the thickness is too large, the floor sheet A has a hardness suitable for peeling.

As shown in FIGS. 2 and 3, the floor sheet A of the present invention has a sheet main body 1 and an adsorbing portion 2, and the bending rigidity toward the front surface side is larger than the bending rigidity toward the back surface side. Therefore, it is hard to bend to the surface side rather than the back surface side.
The suction unit 2 is provided on the back surface of the sheet body 1. The adsorbing part 2 is provided in order to adsorb and fix the floor sheet A to the floor surface and to provide an anti-slip effect. That is, the adsorption | suction part 2 fixes the floor sheet A so that the floor sheet A may not shift | deviate to the surface direction and vertical direction of a floor surface. The floor surface is a place where the floor sheet A is laid. The suction part 2 is provided on the back surface of the sheet body 1, and thus the back surface of the suction part 2 constitutes the outermost surface of the floor sheet A.
By adhering the adsorbing part 2 to the floor surface in a peelable state, the floor sheet A is not displaced from the floor surface, and the floor sheet A can be removed from the floor surface.
In addition, it is desirable for the adsorption | suction part 2 to be what can be repeatedly used from the objective of this invention. By making the suction part 2 reusable, the floor sheet A can be easily and conveniently removed.

  In addition, as shown in FIG. 4, in order to protect the adsorption part 2 or prevent foreign matter from adhering to the adsorption part 2 and to prevent them from adsorbing each other during storage and transportation, it is easy to store. The release sheet B may be attached to the back surface of the floor sheet A. The release sheet B will be described later.

[Sheet body]
The sheet body 1 is a main member constituting the floor sheet A and has the same flexibility as the floor sheet A.
The sheet body 1 has a bending rigidity toward the front surface side larger than a bending rigidity toward the back surface side.

As shown in FIG. 5A, the sheet main body 1 is placed on a flat surface (a flat surface is not shown) with the end 1a on the first side in the first direction of the sheet main body 1 and the periphery thereof, When the end 1b on the second side in one direction is pulled up to the surface side with a predetermined force, the end 1b on the second side in the first direction and its periphery are placed on a flat surface. It curves when the end 1a on the first side in one direction is pulled up to the surface side with a predetermined force.
Further, as shown in FIG. 5B, the sheet main body 1 is placed on the flat surface (the flat surface is not shown) with the end 1a on the first side in the first direction of the sheet main body 1 and its periphery. Curved when the end 1b on the second side in the first direction is pulled down to the back side with a predetermined force, similarly, the end 1b on the second side in the first direction and its periphery are placed on a flat surface, The first side end 1a in the first direction is bent when pulled down to the back side with a predetermined force. Note that the first side and the second side in the first direction are opposite sides in the first direction.

As shown in FIG. 5, the sheet body 1 whose bending rigidity toward the front surface side is larger than bending rigidity toward the back surface side is pulled up with a predetermined force at the end portion 1 b on the second side in the first direction toward the surface side. The degree of curvature toward the front side is smaller than the degree of curvature toward the back side when the second side end 1b is pulled down to the back side with the same force as described above. Regarding the degree of curvature toward the front side when the first side end 1a in the first direction is pulled up to the front side with a predetermined force, the first side end 1a is pulled down to the back side with the same force as described above. It is smaller than the degree of curvature toward the back side.
In addition, although not particularly illustrated, the first side end and the second side end in the second direction of the sheet body 1 are similarly set to the surface side on the first side end and the second side end in the second direction. The degree of curvature toward the front side when pulled up with a predetermined force is greater than the degree of curvature toward the back side when the first and second end portions are pulled down to the back side with the same force as described above. small.
That is, as is clear from the comparison between FIGS. 5A and 5B, the sheet body 1 is difficult to bend toward the front side when bending stress is applied to the front and back sides with the same force, and toward the back side. Easy to bend.

The bending rigidity to the front surface side and the bending rigidity to the back surface side can be evaluated by, for example, the amount of drooping to the front surface side and the amount of drooping to the back surface side of the sheet body 1.
In other words, the left side of the seat body 1 is fixed and the right side is the free end, and the sheet body 1 is bent according to its own weight. The seat body 1 is curved and the right end is lowered. It can be evaluated that the smaller the drooping amount, the less the bending and the greater the bending rigidity. For the amount of drooping, fix one end of the floor sheet on the pedestal, project the opposite end from the end of the pedestal by 20 cm, and measure the hanging length of the opposite end Obtained by. The detailed method of measuring the amount of droop is as in the examples described later, and reference should be made thereto.

The amount of drooping to the front side of the sheet body 1 and the amount of drooping to the back side are not particularly limited on the condition that the amount of drooping to the front side is smaller than the amount of drooping to the back side.
The amount of drooping to the surface side is, for example, 50 mm to 160 mm, preferably 55 mm to 150 mm, more preferably 60 mm to 140 mm, still more preferably 65 mm to 130 mm, and most preferably 65 mm. ~ 100 mm.
The amount of drooping to the back side is, for example, 60 mm to 180 mm, preferably 70 mm to 170 mm, more preferably 80 mm to 160 mm, still more preferably 90 mm to 150 mm, and most preferably 100 mm. ~ 130 mm.
The difference in the amount of sag (the amount of sag on the back surface side-the amount of sag on the front side) is, for example, 5 mm to 70 mm, preferably 10 mm to 60 mm, more preferably 15 mm to 55 mm, and still more preferably. Is 20 mm to 55 mm, and most preferably 30 mm to 50 mm.
By using the sheet body 1 in which the amount of sag to the front surface side and the amount of sag to the back surface side are in the above ranges, the floor sheet A having excellent peelability to the floor surface and further excellent unevenness followability can be configured.

  In addition, in this embodiment, the adsorption | suction part 2 is formed from the foamed resin etc. which have a softness | flexibility, and this adsorption | suction part 2 does not contribute to the bending rigidity of the floor sheet A substantially. That is, since the presence or absence of the adsorbing portion does not substantially affect the bending rigidity of the floor sheet A, the bending rigidity of the floor sheet A and the bending rigidity of the sheet main body 1 can be equated. Therefore, the amount of drooping to the front surface side and the amount of drooping to the back surface side of the sheet body 1 can be said to be the amount of drooping to the front surface side and the amount of drooping to the back surface side of the floor sheet A.

The sheet body 1 has a curved shape with both end portions on the back surface side and the central portion on the front surface side at 23 ° C. (hereinafter sometimes referred to as a downward curved shape). Preferably, the sheet body 1 has a curved shape with both end portions on the back surface side and a center portion on the front surface side at 23 ° C., and is flat at 0 ° C.
As shown in FIG. 6, the sheet body 1 has a first side end 1a and a second side end 1b in the first direction on the back side and in the middle at a temperature of 23 ° C. and a humidity of 60% RH. The central portion 1c is curved with the surface side. Although not particularly illustrated, the sheet main body 1 is the same in the second direction of the sheet main body 1 at 23 ° C., and the end on the first side and the end on the second side in the second direction are on the back side. And it has the curved shape which made the center part between them the surface side. The floor sheet A having the sheet body 1 that curves downward at a standard temperature of 23 ° C. has excellent joint concealment properties, can prevent floating of the end portion, and can be laid on the floor surface with a good finish and a beautiful finish.

[Layer structure of sheet body]
The layer structure of the sheet body 1 is not particularly limited on the condition that the bending rigidity toward the front surface side is larger than the bending rigidity toward the back surface side.
For example, the layer constituting the outermost surface of the sheet body 1 is formed from a resin material. The outermost surface of the sheet body 1 may be smooth or may have a desired uneven shape. The uneven outermost surface can be formed, for example, by embossing at least a layer constituting the outermost surface.

As shown in FIGS. 7 to 11, the sheet main body 1 includes a back layer 3, an intermediate base material layer 4, and a surface layer 5 in order from the back surface side to the front surface side.
The back layer 3 is a layer disposed on the back side with respect to the intermediate base material layer 4, and the surface layer 5 is disposed on the surface side with respect to the intermediate base material layer 4. Layer.
Examples of the back layer 3 include a back side resin layer 32, a back side base material layer 31, and the like, and one or two or more thereof are selected and laminated. Preferably, the back layer 3 is formed by laminating a back side base material layer 31 and a back side resin layer 32 in order from the back side to the front side.
Examples of the surface layer 5 include an anti-scratch layer 53, a protective layer 52, a decorative layer 51, a front resin layer 54, and the like, and one or two or more of these are selected and laminated. Preferably, the surface layer 5 is formed by laminating a decorative layer 51 and a scratch-preventing layer 53 or a protective layer 52 in order from the back surface side to the front surface side.

It is preferable that the back side resin layer 32 and the front side resin layer 54 each independently include a soft synthetic resin as a main component resin. In particular, the sheet main body 1 is mainly composed of at least one resin layer of the back side resin layer 32 and the front side resin layer 54 containing a soft synthetic resin as a main component resin. The main component of the resin layer means that the weight ratio of the resin layer is large in the total weight of the sheet body 1.
In this specification, the soft synthetic resin and the hard synthetic resin mean the soft plastic and the hard plastic described in the plastic terminology of JIS K6900 (1994).

7 to 11 are enlarged cross-sectional views of a floor sheet A having sheet bodies 1 having various layer configurations. In addition, since the top view of these floor sheets A is the same as that of FIG. 1, it is abbreviate | omitting.
In the sheet body 1 of the first example in FIG. 7, the back side base material layer 31, the back side resin layer 32, the intermediate base material layer 4, the decorative layer 51, the protective layer 52, in order from the back side to the front side, And an anti-scratch layer 53. These layers are joined and integrated. In the example shown in FIG. 7, you may abbreviate | omit either the protective layer 52 or the damage prevention layer 53 as needed. In the example shown in FIG. 7, the back-side base material layer 31 may be omitted as necessary.

  The sheet body 1 of the second example in FIG. 8 has a back base material layer 31, a first back resin layer 321, a second back resin layer 322, and an intermediate base material layer 4 in order from the back side to the front side. And a decorative layer 51, a protective layer 52, and an anti-scratch layer 53. These layers are joined and integrated. In the example shown in FIG. 8, you may abbreviate | omit either the protective layer 52 or the damage prevention layer 53 as needed. In the example shown in FIG. 8, the back-side base material layer 31 may be omitted as necessary.

  The sheet body 1 of the third example in FIG. 9 includes, in order from the back surface side to the front surface side, a first back resin layer 321, a back substrate layer 31, a second back resin layer 322, and an intermediate substrate layer 4. And a decorative layer 51, a protective layer 52, and an anti-scratch layer 53. These layers are joined and integrated. In the example shown in FIG. 9, either the protective layer 52 or the scratch preventing layer 53 may be omitted as necessary.

  The sheet body 1 of the fourth example in FIG. 10 includes a back side base layer 31, a back side resin layer 32, an intermediate base layer 4, a front side resin layer 54, and a decorative layer 51 in order from the back side to the front side. The protective layer 52 and the scratch-preventing layer 53 are provided. These layers are joined and integrated. In the example shown in FIG. 10, you may abbreviate | omit either the protective layer 52 or the damage prevention layer 53 as needed. In the example shown in FIG. 10, the back side base material layer 31 may be omitted as necessary.

  The sheet body 1 of the fifth example in FIG. 11 is, in order from the back side to the front side, the back side base material layer 31, the back side resin layer 32, the intermediate base material layer 4, the front side resin layer 54 having design properties, It has a protective layer 52 and a scratch-preventing layer 53. These layers are joined and integrated. In the example shown in FIG. 11, you may abbreviate | omit either the protective layer 52 or the damage prevention layer 53 as needed. In the example shown in FIG. 11, the back-side base material layer 31 may be omitted as necessary.

<Back side base material layer>
The back side base material layer 31 is a layer mainly constituting the outermost back surface of the sheet body 1. However, as shown in FIG. 9, the back-side base material layer 31 may not constitute the outermost back surface of the sheet body 1. By providing the back side base material layer 31 on the rearmost surface of the sheet body 1, it is possible to prevent the end portion of the floor sheet A from warping upward. Further, the back surface of the back base material layer 31 constitutes the backmost surface of the sheet body 1, so that the forming material of the suction portion 2 is impregnated into the back base material layer 31 and the suction portion 2 firmly adhered to the sheet body 1 is provided. Can be formed.
Although it does not specifically limit as the said back side base material layer 31, For example, felt, a nonwoven fabric, a woven fabric, paper etc. are mentioned. The material of the fiber constituting the felt is not particularly limited, and examples thereof include animal hair such as sheep; synthetic resin fibers such as polyester and polyolefin. The material of the fibers constituting the nonwoven fabric or the woven fabric is not particularly limited, and examples thereof include synthetic resin fibers such as polyester and polyolefin; inorganic fibers such as glass and carbon; natural fibers and the like. It is preferable to use felt as the back-side base material layer 31 in that it is excellent in non-land absorbability, cushioning properties, sound absorption, workability, and the like.
Although the thickness of the said back side base material layer 31 is not specifically limited, For example, it is 0.1 mm-1 mm, Preferably it is 0.2 mm-0.6 mm. Also, the basis weight of the backside substrate layer 31 is not particularly limited, for ^example, a ^{30g / m 2 ~200g / m 2} . If the thickness or basis weight of the back-side base material layer 31 is too small, the upward warping may not be sufficiently suppressed. On the other hand, if the back-side base material layer 31 is too large, the back-side base material layer 31 may not be sufficiently impregnated with the material for forming the adsorption part 2. There is.

<Back side resin layer and front side resin layer>
The back side resin layer 32 and the front side resin layer 54 are main layers constituting the strength and weight of the sheet body 1.
The back side resin layer 32 and the front side resin layer 54 may be independently foamed foams or non-foamed non-foams. From the viewpoint of imparting cushioning properties to the floor sheet A, at least one of the back side resin layer 32 and the front side resin layer 54 is preferably a foam. In particular, since the rigidity of the front side resin layer 54 is higher than that of the back side resin layer 32, it is preferable that the back side resin layer 32 is a foam and the front side resin layer 54 is a non-foam. The sheet body 1 having the resin layer having the rigidity difference on the front and back sides tends to be downwardly curved.

8 and 9, when the back side resin layer 32 is composed of a plurality of resin layers (in the illustrated example, the first and second back side resin layers 321 and 322), all of them are non-foamed. Although it may be comprised by the body, Preferably at least 1 resin layer of the plurality is comprised by the foam. For example, in the example shown in FIGS. 8 and 9, (1) the first back resin layer 321 is made of a non-foam and the second back resin layer 322 is made of a foam. The back side resin layer 321 is made of a foam and the second back side resin layer 322 is made of a non-foam. (3) Both of the first and second back side resin layers 321 and 322 are made of a foam. Is done. In particular, since the rigidity of the second back resin layer 322 (front resin layer) is higher than that of the first back resin layer 321 (back resin layer), the first back resin layer 321 is It is preferable that the second backside resin layer 322 is made of a foam and is made of a non-foam. The sheet body 1 having such a resin layer tends to be curved downward. The front side resin layer 54 may also be composed of a plurality of resin layers.
When the back side resin layer 32 and the front side resin layer 54 are foams, the expansion ratio is not particularly limited, but is, for example, 1.1 times to 4 times, preferably 1.1 times to 2 times. . If the expansion ratio is too low, the floor sheet A cannot be substantially cushioned. On the other hand, if the expansion ratio is too high, the floor sheet A becomes too deformed in the thickness direction.

The resin components of the back-side resin layer 32 and the front-side resin layer 54 are not particularly limited, and conventionally known ones can be used independently. Generally, a thermoplastic resin is used, and a soft resin is used. These thermoplastic resins are used.
Examples of the thermoplastic resin include vinyl chloride resins such as vinyl chloride and vinyl chloride-vinyl acetate copolymers; polyolefin resins; urethane resins; vinyl acetate resins such as ethylene-vinyl acetate copolymers; Examples thereof include acrylic resins such as resins; polyamide resins; ester resins; various elastomers such as olefin elastomers and styrene elastomers; and rubbers. These can be used alone or in combination of two or more. The back side resin layer 32 and the front side resin layer 54 are made of vinyl chloride because they are inexpensive and have excellent flexibility and durability, and are easy to join with a bonding resin described later, and have excellent workability and durability. A resin layer containing a resin as a main component resin is preferable.

  Moreover, the resin component of the back side resin layer 32 and the front side resin layer 54 may be the same, may be the same, or may differ. The same kind of resin component means that the monomers constituting the main repeating unit of the resin component are the same, and when having a copolymer monomer, the copolymer monomer is different and / or the degree of polymerization is Including different cases. That the resin component is the same means that the repeating unit (and the copolymer monomer, if any) is the same, includes the case where the polymerization degrees are different.

  In the present specification, the main component resin refers to the largest component (weight ratio) among the resin components (excluding additives) constituting the layer. The amount of the main component resin is more than 50% by weight, preferably 70% by weight or more, and more preferably 80% by weight or more when the total resin component constituting the layer is 100% by weight. The upper limit of the amount of the main component resin is 100% by weight. When the amount of the main component resin is less than 100% by weight, the resin other than the main component resin contained in the layer is not particularly limited, and a known resin component can be used.

As the vinyl chloride resin, those produced by an emulsion polymerization method, a suspension polymerization method, a solution polymerization method, a bulk polymerization method, or the like can be used. A vinyl chloride resin obtained by an emulsion polymerization method or a suspension polymerization method is preferred because it is easy to process and handle. These vinyl chloride resins may be used alone or in combination of two or more.
Preferably, the back resin layer 32 includes a suspension vinyl chloride resin as a main component resin. By forming the back side resin layer 32 from a suspension vinyl chloride resin, the floor sheet A having a relatively small thickness can be configured while ensuring the strength of the floor sheet A. Similarly, the front side resin layer 54 preferably includes a suspension vinyl chloride resin as a main component resin.

The paste vinyl chloride resin is, for example, a paste-like vinyl chloride resin obtained by an emulsion polymerization method, and the viscosity can be appropriately adjusted with a plasticizer. The paste vinyl chloride resin is a fine powder having a particle diameter of 0.1 to 10 μm (preferably 1 to 3 μm) composed of a large number of fine particle aggregates. Preferably, the surface of the fine powder is coated with a surfactant. ing. The average degree of polymerization of the paste vinyl chloride resin is preferably about 1000 to 2000.
The suspension vinyl chloride resin is, for example, a vinyl chloride resin obtained by a suspension polymerization method. The suspension vinyl chloride resin is a fine powder having a particle size of preferably 20 μm to 100 μm. The average degree of polymerization of the suspension vinyl chloride resin is preferably about 700 to 1500, more preferably about 700 to 1100, and still more preferably about 700 to 1000.
However, the particle diameter is the median diameter (D50) in the volume-based particle size distribution.

Each vinyl chloride resin preferably has a K value of about 60 to 95, and more preferably has a K value of about 65 to 80.
The back side resin layer 32 and the front side resin layer 54 usually contain various additives in addition to the above resin components. As the additive, conventionally known additives can be used, and examples thereof include a filler, a plasticizer, a flame retardant, a stabilizer, a hygroscopic agent, an antioxidant, a lubricant, a colorant, a foaming agent, and an antifungal agent.
The thickness of the back side resin layer 32 is not particularly limited and can be set as appropriate. For example, the thickness is 0.5 mm to 5 mm, and preferably 0.7 mm to 2 mm. In addition, the thickness of the said back side resin layer 32 is corresponded to the sum total thickness of the some resin layer, when the back side resin layer 32 is comprised from a some resin layer.
The thickness of the front side resin layer 54 is not particularly limited, but is preferably smaller than the thickness of the back side resin layer 32. The thickness of the front side resin layer 54 is, for example, 0.1 mm to 2 mm, preferably 0.2 mm to 1 mm. When the front side resin layer 54 is composed of a plurality of resin layers, the thickness of the front side resin layer 54 corresponds to the total thickness of the plurality of resin layers.

  In addition, when using the front side resin layer 54 which has the designability like FIG. 11, you may set the thickness of the front side resin layer 54 comparatively small. For example, the thickness of the front side resin layer 54 having design properties is 0.05 mm to 0.5 mm. The front side resin layer 54 having design properties itself can be a design. The front side resin layer 54 having the design property is (1) when a design is expressed by the color of the front side resin layer itself, (2) a colorant is mixed in the front side resin layer, and the color of the colorant and how to mix the colorant (3) When resin chips are mixed in the front side resin layer and the design is expressed by the color, shape, dispersion method, etc. of the resin chip, (4) Colors are displayed on the front side resin layer. In the case where different colorants and resin chips are mixed and the design is expressed by their color or mixing method.

<Intermediate base material layer>
The intermediate base material layer 4 is a layer interposed in the middle portion in the thickness direction of the sheet body 1.
By providing the intermediate base material layer 4, the floor sheet A excellent in dimensional stability can be configured.
Although it does not specifically limit as the said intermediate | middle base material layer 4, For example, a nonwoven fabric, a woven fabric, etc. are mentioned. The material of the fibers constituting the nonwoven fabric or the woven fabric is not particularly limited, and examples thereof include synthetic resin fibers such as polyester and polyolefin; inorganic fibers such as glass and carbon; natural fibers and the like. In particular, since the dimensional change due to temperature is small, it is preferable to use a glass sheet containing glass fibers as the intermediate base material layer 4.

As said glass sheet, the glass nonwoven fabric or glass woven fabric containing a some glass fiber is mentioned.
As shown in FIGS. 12 and 13, a glass nonwoven fabric 41 that is an example of a glass sheet has a plurality of glass fibers 4 a that are randomly stacked or entangled in the vertical direction (thickness direction) and bound with a binder such as an adhesive. That are bound to each other to form a layer, or although not particularly shown, a plurality of glass fibers overlap or entangle in a vertical direction with a certain degree of regularity, and they are bound to a binder such as an adhesive. Are bound to each other or are bound together to form a layer.
As said binder, a thing with high bondability with respect to the glass fiber 4a is preferable, and what has high bondability with respect to the glass fiber 4a and bonding resin mentioned later is more preferable. As such a binder, an adhesive mainly composed of a known resin can be used. For example, a one-component adhesive, a two-component adhesive, a thermosetting adhesive, a hot-melt adhesive, Examples thereof include electron beam curable adhesives such as ultraviolet curable adhesives. Specific examples include one or a mixture of two or more selected from urethane resins, vinyl acetate resins, styrene-butadiene copolymer resins, acrylic resins, vinyl chloride resins, and epoxy resins.

  The glass nonwoven fabric 41 is formed, for example, by forming the glass fiber 4a into a sheet by dispersing the paper fiber 4a substantially uniformly in water mixed with a dispersant, a thickener, and the like, and forming the glass fiber 4a. It can be obtained by applying or impregnating a binder to the sheet. The coating can be performed by using various coaters such as a roll coater, knife coater, curtain coater, flow coater, spray coater, die coater, etc .; spraying; brush coating; rollers, etc. Etc. The binder is applied or impregnated to a certain thickness, but excess binder is removed by suction with a vacuum knife or the like as necessary. When the amount of the binder per unit area of the glass nonwoven fabric 41 is in a desired range, the glass nonwoven fabric 41 can be obtained by curing the binder and drying. The amount of the binder can be adjusted by the application or impregnation, suction as required.

As shown in FIGS. 14 and 15, the glass woven fabric 42 which is an example of a glass sheet is a layer in which a plurality of glass fibers 4 a are woven with regularity vertically and horizontally, or a plurality of glass fibers. 4a is vertically and horizontally overlapped in the vertical direction with regularity, and they are bound by a binder such as an adhesive to form a layer.
The thickness of each glass fiber 4a which comprises the glass nonwoven fabric 41 and the glass woven fabric 42 is not specifically limited, For example, it is each 5 micrometers-30 micrometers in diameter, Preferably, it is 8 micrometers-20 micrometers in diameter.
The length of the glass fiber 4a of the glass nonwoven fabric 41 is not specifically limited, For example, it is 10 mm-30 mm. The glass fiber 4a of the glass nonwoven fabric 41 may be comprised only from the short fiber, may be comprised only from the long fiber, or may be comprised from the mixture of the short fiber and the long fiber. Although the glass nonwoven fabric 41 comprised only from the short fiber is excellent in dimensional stability, the glass nonwoven fabric 41 comprised from the mixture of a short fiber and a long fiber is excellent also in tensile strength in addition to dimensional stability. . Although the length of the said short fiber is not specifically limited, For example, it is 10 mm-35 mm, and the length of a long fiber is larger than the length of the short fiber. In addition, the glass fiber 4a of the glass woven fabric 42 consists of a fiber longer than the said long fiber normally.
A commercial item can also be used as the glass sheet.

The glass nonwoven fabric 41 and the glass woven fabric 42 to which the glass fibers 4a are bound with a certain degree of regularity are oriented in a predetermined direction according to the regular glass fibers 4a. When a glass sheet having orientation is used, a bonding resin described later can be relatively uniformly attached, and the glass fibers 4a are less dropped when the bonding resin is applied.
In FIG. 13 and FIG. 15, two or three glass fibers 4 a are shown in a state where they are overlapped in the thickness direction. However, these drawings are merely reference diagrams, and are actual glass nonwoven fabric 41 and glass. It should be noted that in the woven fabric 42, more glass fibers 4a may overlap each other in the thickness direction.

  The glass sheets such as the glass nonwoven fabric 41 and the glass woven fabric 42 have innumerable openings between the glass fibers 4a. Each opening conceptually has a gap between adjacent glass fibers 4a continuously connected in the thickness direction of the glass sheet. Each of the openings is a mode in which a gap between the glass fibers 4a continues substantially parallel to the thickness direction of the glass sheet and communicates with the front and back surfaces of the glass sheet substantially linearly, or the gap between the glass fibers 4a is in the thickness direction of the glass sheet. For example, an aspect in which the glass sheet is continuously arranged while being inclined, curved, bent, or meandering and communicated with the front and back surfaces of the glass sheet is included. The opening of the former aspect is usually an aspect in which things existing on the back side of the glass sheet can be visually recognized when viewed from the front side of the glass sheet, and the opening of the latter aspect is usually It is an aspect which cannot visually recognize it.

Although the thickness of a glass sheet is not specifically limited, Preferably it is 0.1 mm-0.5 mm, More preferably, it is 0.15 mm-0.4 mm, More preferably, it is 0.20 mm-0.35 mm. Also, the basis weight of the glass sheet is not particularly limited, is preferably from ^{10g / m 2 ~100g / m 2} , more preferably ^{20g / m 2 ~50g / m 2} . If the thickness or basis weight of the glass sheet is too small, the tensile strength and dimensional stability of the floor sheet A cannot be sufficiently improved. On the other hand, if the glass sheet is too large, the bonding resin may not sufficiently reach the opening of the glass sheet. There is. In particular, the glass nonwoven fabric 41 is preferably in the range of the thickness and the basis weight.
The density of the glass sheet is not particularly limited, for ^example, a ^{0.1g / cm 3 ~0.5g / cm 3} .

  Since the said glass sheet has innumerable opening, the ventilation path which leads from the surface side of a glass sheet to a back surface side is ensured in the surface of a glass sheet. When the aperture ratio of the glass sheet is large, the air permeability of the glass sheet is increased. Conversely, when the aperture ratio is small, the air permeability of the glass sheet is decreased. In this specification, the aperture ratio is evaluated by measuring the air permeability of the glass sheet in consideration of such points. In addition, the said aperture ratio says the opening total area occupied per unit area of the surface of a glass sheet.

Air permeability of said glass sheet is preferably ^{100cc / cm 2 · sec~550cc / cm} 2 · sec, more preferably ^{200cc / cm 2 · sec~450cc / cm} 2 · sec. In order to improve the bondability between the back side resin layer 32 and the decorative layer 51 or between the back side resin layer 32 and the front side resin layer 54, it is preferable that the glass sheet with resin described later has a large aperture ratio, and such an aperture ratio is large. In order to obtain a glass sheet with a resin, it is preferable to use a glass sheet having a high air permeability, that is, a glass sheet having a relatively large opening ratio. On the other hand, in order to give the floor sheet A the strength and dimensional change suppression effect by the glass sheet, there is a certain upper limit in the aperture ratio of the glass sheet. From such a viewpoint, the glass sheet preferably has an air permeability of 550 cc / cm ² · sec or less.
However, in this specification, the air permeability of the glass sheet is determined according to the air permeability test method of JIS L 1096, using a Frazier type air permeability tester manufactured by Toyo Seiki Seisakusho Co., Ltd. It is a value measured in a state where three sheets are stacked. The reason for measuring in a state where three sheets are stacked is that the air permeability is too high in the case of a glass sheet having a suitable aperture ratio. This is because it may be difficult to measure.

In order to firmly bond the back surface and the layer adjacent to the front surface with respect to the glass sheet (intermediate base material layer 4), it is preferable that a bonding resin is attached to the glass sheet. The glass sheet to which the bonding resin is attached may be referred to as “glass sheet with resin”.
16 and 17 are detailed enlarged cross-sectional views showing a floor sheet using a glass sheet to which a bonding resin is attached. The detailed enlarged sectional view of FIG. 16 shows the sheet body 1 having the layer configuration of the first example of FIG. 7, and the detailed enlarged sectional view of FIG. 17 shows the sheet body 1 of the layer configuration of the fourth example of FIG. . Moreover, although FIG.16 and FIG.17 has shown the case where the glass nonwoven fabric 41 is used as a glass sheet, it is the same also when the glass woven fabric 42 is used.

  In the layer configuration shown in FIG. 16, the glass fiber 4 a and the back resin layer 32, and the glass fiber 4 a and the decorative layer 51 are bonded via the bonding resin 6. In addition, the back side resin layer 32 enters the opening of the glass sheet with resin, passes through the opening, faces the surface side of the glass nonwoven fabric 41, and is directly bonded to the decorative layer 51. In the sheet body 1 having a layer structure that does not have the front side resin layer 54 between the decorative layer 51 and the glass nonwoven fabric 41 (intermediate base material layer 4) as shown in FIG. Although it is also bonded to the resin 6, it is mainly bonded to the back side resin layer 32.

  In the layer configuration shown in FIG. 17, the glass fiber 4 a, the back resin layer 32, and the front resin layer 54 are bonded via the bonding resin 6. Moreover, the front side resin layer 54 and the decorative layer 51 are directly joined. Furthermore, the back side resin layer 32 and the front side resin layer 54 enter the opening of the glass sheet with resin, and are directly joined. In FIG. 17, the back side resin layer 32 and the front side resin layer 54 are joined at the central portion in the thickness direction of the glass nonwoven fabric 41 and the joining interface is drawn linearly. Alternatively, it should be noted that there is a portion where the front side resin layer 54 protrudes and joins to the front surface side or the back surface side of the glass nonwoven fabric 41, and the bonding interface between both layers 32 and 54 may not be linear. . Moreover, in FIG.16 and FIG.17, in order to show the bonding resin 6, the back side resin layer 32, the front side resin layer 54, and the decorative layer 51 in an easy-to-understand manner, a solid line is clearly shown at each of these bonding interfaces. It should be noted that since the bonding resin 6 and the like are all made of a resin material, these interfaces do not appear clearly.

The adhesion mode of the bonding resin 6 to the glass sheet (glass nonwoven fabric 41 or glass woven fabric 42) can be roughly classified into the following four modes as seen from the front surface side and the back surface side.
(A) The bonding resin 6 is attached to all of the plurality of glass fibers 4a constituting the glass sheet as viewed from the surface side of the glass sheet with resin.
(B) The bonding resin 6 is attached to at least a part of the plurality of glass fibers 4a constituting the glass sheet when viewed from the surface side of the glass sheet with resin, and at least one glass of the plurality of glass fibers 4a. It has a portion not attached to the fiber 4a.
(C) The bonding resin 6 adheres to all of the plurality of glass fibers 4a constituting the glass sheet as viewed from the back side of the glass sheet with resin.
(D) The bonding resin 6 is attached to at least a part of the plurality of glass fibers 4a constituting the glass sheet and attached to at least one of the plurality of glass fibers 4a when viewed from the back side of the glass sheet with resin. It has a part that is not.
In this specification, “viewed from the front surface (or back surface)” means viewing from a direction perpendicular to the front surface (or back surface) of the layer.
The bonding mode of the bonding resin 6 is one mode selected from the above (a) to (d), the mode (a) and (c), the mode (a) and (d), and the mode (b) and (c). Or any of the embodiments (b) and (d).

In (a), the glass fiber 4a is covered with the bonding resin 6 when viewed from the front surface side of the glass sheet with resin, and similarly in (c), the glass fiber is viewed from the back surface side of the glass sheet with resin. The fiber 4 a is covered with the bonding resin 6.
In (b), the glass fiber 4a is exposed when viewed from the front surface side of the resin-coated glass sheet. Similarly in (d), it is viewed from the back surface side of the resin-coated glass sheet. And a portion where the glass fiber 4a is exposed.
In said (b), seeing from the surface side of the glass sheet with resin, the exposure rate of the glass fiber 4a is, for example, more than 0 and 70% or less, preferably more than 0 and 50% or less, more preferably It exceeds 0 and is 30% or less.
In said (d), seeing from the back surface side of the glass sheet with resin, the exposure rate of the glass fiber 4a is, for example, more than 0 and 70% or less, preferably more than 0 and 50% or less, more preferably It exceeds 0 and is 30% or less.
The exposure rate of the glass fibers 4a is the total area of the glass fibers exposed per unit area of the glass sheet with resin. The exposure rate is, for example, arbitrarily extracting a range of 1 cm × 1 cm from the front surface (or back surface) of the glass sheet with resin, and measuring the area where the glass fiber is exposed when viewed from the front surface side (or back surface side) in that range. And the formula: exposure rate (%) = total area of exposed glass fibers / 1 cm ² ) × 100.

The bonding resin 6 may be attached to the entire surface of the glass fiber 4a, or may be attached to the entire surface of many glass fibers 4a and to a part of the surface of the remaining glass fibers 4a. In addition, the surface of the glass fiber 4a is the meaning including the surface of the glass fiber itself which comprises a glass sheet, and the surface of the binder, when the binder is joined to the said glass fiber.
In the illustrated example, the bonding resin 6 is attached to the entire surface of many glass fibers 4a among the plurality of glass fibers 4a and to a part of the surface of the remaining glass fibers 4a.

  Further, the bonding resin 6 may be uniformly attached to the surface of the glass fiber 4a or may be unevenly attached. The adhesion state of the bonding resin 6 varies depending on the method of bonding the bonding resin 6 to the glass sheet. For example, when the bonding resin 6 is applied to the glass sheet using a coater such as a roll coater or a knife coater, the bonding resin 6 is non-uniformly attached to the surface of the glass fiber 4a as shown in the illustrated example. In other words, the bonding resin 6 is attached with a thickness difference on the surface of the glass fiber 4a. In the case of non-uniformity, (1) the thickness of the bonding resin 6 on the front side of the glass fiber 4a is larger than the thickness of the bonding resin 6 on the back side of the glass fiber 4a, as shown in the figure, (2) bonding on the back side of the glass fiber 4a The thickness of the resin 6 is larger than the thickness of the bonding resin 6 on the front side of the glass fiber 4a. (3) The thickness of the bonding resin 6 on the side of the glass fiber 4a is larger than the thickness of the bonding resin 6 on the front side and the back side of the glass fiber 4a. Is also large.

In the resin-coated glass sheet, the basis weight of the bonding resin 6 is not particularly limited, for ^example, a ^{5g / m 2 ~105g / m 2} , preferably ^{10g / m 2 ~80g / m 2} , more preferably 15 g / a ^{m 2} ~60g / m ^2.
The basis weight of the bonding resin 6 is preferably larger from the viewpoint of improving the bonding properties of the glass fiber 4a and the back resin layer 32 (or the front resin layer 54) and the glass fiber 4a and the decorative layer 51, but generally The air permeability of the glass sheet with resin, that is, the opening ratio is reduced in proportion to the basis weight of the bonding resin 6.
Also, the basis weight of the resin-coated glass sheet (sum of the weight per unit area of the glass sheet and the bonding resin 6) is not particularly limited, for ^example, a ^{15g / m 2 ~205g / m 2} , preferably 20 g / ^{m 2} ~180g / ^{m 2,} more preferably from ^{35g / m 2 ~160g / m 2} .
In addition, the thickness of the glass sheet with resin is not particularly limited, but is approximately 0.2 mm to 0.6 mm. However, since the front and back surfaces of the glass sheet with resin are often not flat, the specific thickness of the glass sheet with resin is an average value of several places.

  The glass sheet with resin has innumerable openings because the bonding resin 6 does not block all the openings of the glass sheet. In other words, the glass sheet with resin has an opening due to the opening of the glass sheet itself. The opening ratio of the glass sheet with resin is smaller than the opening ratio of the glass sheet. In addition, the opening ratio of the said glass sheet with resin says the opening total area which occupies per unit area of the surface of the glass sheet with resin.

  The opening of the glass sheet with resin has the same meaning as the opening of the glass sheet. In the description of the opening of the glass sheet with resin, in the description of the opening of the glass sheet, “glass fiber” is read as “glass fiber with resin” and “glass sheet” is read as “glass sheet with resin”.

The air permeability of the glass sheet with resin is smaller than the air permeability of the glass sheet. In specific numerical values, the air permeability of the resin-coated glass sheet is a preferably ^{80cc / cm 2 · sec~500cc / cm} 2 · sec, more preferably ^{100cc / cm 2 · sec~400cc / cm} 2 · sec .
In order to improve the bondability between the back side resin layer 32 and the glass fibers 4a, it is preferable that the glass sheet with resin has a large aperture ratio. However, as described above, it is too large in consideration of the strength and the warp preventing effect. It is not appropriate to use a glass sheet having an aperture ratio. Therefore, when using a glass sheet having a range of air permeability as described above, air permeability of the resin-coated glass sheet ^is to be in the range of ^{80cc / cm 2 · sec~500cc / cm} 2 · sec It is preferable to set.
In the glass sheet with resin having such air permeability, the resin material constituting the back side resin layer 32 (and the front side resin layer 54) easily enters the opening.
However, the air permeability of the glass sheet with a resin is 3 according to the JIS L 1096 air permeability test method using a Frazier type air permeability tester manufactured by Toyo Seiki Seisakusho Co., Ltd. It is a value measured in a state where the sheets are stacked.

The bonding resin 6 of the glass sheet with resin functions as a binder resin for bonding the back side resin layer 32 and the like to the glass fiber 4a.
The bonding resin 6 is not particularly limited as long as it can be bonded to any of the glass fibers 4a, the back side resin layer 32, and the front side resin layer 54, and a conventionally known resin can be used. Examples of the bonding resin 6 include thermoplastic resins as exemplified for the back side resin layer 32.
The bonding resin 6 preferably contains a vinyl chloride resin as the main component resin, and is paste chloride as the main component resin, because it has excellent bondability to the back side resin layer 32 having the vinyl chloride resin as the main component resin. It is preferable to contain a vinyl resin.

Suspension vinyl chloride resin is relatively hard, so it is difficult for the resin to adhere firmly to the glass sheet, but the paste vinyl chloride resin has a large amount of plasticizer and is relatively soft, so it can be applied to the glass sheet. It is easy and adheres firmly to the glass fiber 4a. Further, since the paste vinyl chloride resin is excellent in compatibility with the suspension vinyl chloride resin, the bonding resin 6 including the paste vinyl chloride resin is also strong against the back side resin layer 32 and the front side resin layer 54 including the suspension vinyl chloride resin. To join.
The paste vinyl chloride resin contained in the bonding resin 6 is a fine powder having a particle diameter of 0.1 to 10 μm (preferably 1 to 3 μm) composed of a large number of fine particle aggregates, preferably on the surface of the fine powder. Surfactant is coated. The average degree of polymerization of the paste vinyl chloride resin is preferably about 1000 to 2000, and the K value is preferably about 60 to 95, more preferably about 65 to 80.
The bonding resin 6 usually includes various additives. Examples of the additive include those exemplified above.

<Makeup layer>
The decorative layer 51 is a layer that imparts a design to the floor sheet A. The decorative layer 51 is provided as necessary.
Examples of the decorative layer 51 include a transfer layer, a design printing layer, a design printing sheet, and a thermoplastic resin layer to which design properties are imparted. However, the decorative layer 51 is not limited to these exemplary layers, and any other layer can be used as long as it can express a design.
The transfer layer is composed of a transfer film formed by printing and solidifying a printing ink on a base material such as release paper and then peeling the solidified printing ink. The decorative layer 51 made of the transfer layer is formed by transferring to the back surface of the protective layer 52 or the like. The design print layer is composed of a layer in which printing ink is directly printed on the back surface of the protective layer 52 and solidified. The decorative layer 51 made of a design printed sheet is formed by joining a sheet that has been subjected to design printing in advance to the surface of the intermediate base material layer 4, the front side resin layer 54, or the back surface of the protective layer 52. Examples of the material for the design printing sheet include thermoplastic resin sheets such as vinyl chloride resin sheets.

The thermoplastic resin layer imparted with designability is a layer that itself can be designed. The thermoplastic resin layer has (1) a design property imparted by the color of the resin itself, (2) a colorant is mixed, and the design property is imparted by the color of the colorant and how it is mixed. (3) When resin chips are mixed and design properties are given by the color, shape, dispersion method, etc. of the resin chips, (4) Colorants having different colors and resin chips are mixed, When designability is imparted depending on the color or mixing method, etc. The decorative layer 51 made of a thermoplastic resin layer is formed by laminating and bonding the thermoplastic resin layer to the surface of the intermediate base material layer 4 or the surface of the front side resin layer 54.
Examples of the resin component of the thermoplastic resin layer to which the design property is imparted include those exemplified in the section of <Back side resin layer and front side resin layer>, and in particular, the resin layers 32 and 54 and the protective layer. When 52 is a vinyl chloride resin, a resin mainly composed of a vinyl chloride resin is preferable.
Although the thickness of the said makeup | decoration layer 51 is not specifically limited, For example, they are 0.5 micrometer-1 mm, Preferably they are 0.01 mm-0.8 mm. In particular, the thickness of the decorative layer 51 made of a transfer layer or a design printing layer is 0.5 μm to 0.5 mm.

<Protective layer>
The protective layer 52 is a layer provided to protect the decorative layer 51 when it is provided and to easily remove the dirt adsorbed on the floor sheet A. That is, the protective layer 52 imparts stain removal properties to the floor sheet A. The protective layer 52 is provided as necessary. The protective layer 52 may be transparent or opaque, but is preferably transparent so that a design such as the decorative layer 51 provided below the protective layer 52 can be visually recognized.
The protective layer 52 is formed of a resin material. In particular, the protective layer 52 is preferably non-foamed and has a relatively high density. Examples of the resin material for the protective layer 52 include those exemplified above in the section of <Back side resin layer and front side resin layer>, and since they are firmly bonded to the decorative layer 51 or the front side resin layer 54, vinyl chloride is used. A resin mainly composed of a resin is preferred.
The thickness of the protective layer 52 is not specifically limited, For example, it is 0.03 mm-1 mm.

<Scratch prevention layer>
The scratch prevention layer 53 is a layer provided for imparting abrasion resistance, scratch resistance and antifouling properties to the surface of the floor sheet A. The scratch preventing layer 53 is provided as necessary. The scratch-preventing layer 53 may be transparent or opaque, but is preferably transparent so that a design such as the decorative layer 51 provided on the back side of the scratch-preventing layer 53 can be visually recognized. A transparent foam having a relatively high density is preferred.
The resin material for forming the scratch-preventing layer 53 is not particularly limited, but is preferably formed from a relatively hard resin layer. Examples of the scratch preventing layer 53 include those containing a hard synthetic resin as a main component resin. Although it does not specifically limit as said hard synthetic resin, It is preferable to use a curable resin from the favorable workability, and also it is hard to give a thermal damage to the layers (protective layer 52 etc.) in which the damage prevention layer 53 is laminated | stacked. Therefore, it is more preferable to use an ionizing radiation curable resin, and since it is general-purpose, it is more preferable to use an ultraviolet curable resin. Examples of the curable resin include thermosetting resins and resins that are cured by non-ionizing radiation, in addition to ionizing radiation curable resins such as ultraviolet curable resins.

Specifically, the scratch-preventing layer 53 includes a curable resin obtained by polymerizing at least one of a curable monomer and an oligomer, and includes other components as necessary.
Examples of the curable monomer or oligomer that forms the ionizing radiation curable resin and that is cured by ionizing radiation include a curable monomer or oligomer that is cured by ultraviolet rays or electron beams. Hereinafter, a curable monomer or oligomer that is cured by ionizing radiation is referred to as an ionizing radiation curable monomer or oligomer.
Examples of the ionizing radiation curable monomer or oligomer include monomers or oligomers having a polymerizable unsaturated bond group such as a (meth) acrylate group or a (meth) acryloyloxy group or an epoxy group in the molecule.

Specific examples of the ionizing radiation curable monomer include styrene monomers such as α-methylstyrene, methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipenta Examples include erythritol penta (meth) acrylate, urethane (meth) acrylate, and a polyol compound having two or more thiol groups in the molecule. Specific examples of the ionizing radiation curable oligomer include acrylates such as urethane (meth) acrylate, polyester (meth) acrylate, and epoxy (meth) acrylate, unsaturated polyester, and epoxy. These curable monomers or oligomers can be used alone or in combination of two or more.
In these, it is preferable to use the monomer or oligomer which has a (meth) acrylate group in a molecule | numerator as an ionizing radiation-curable monomer or oligomer, and it is more preferable to use urethane (meth) acrylate. In order to improve the antifouling property, a silicone-modified monomer or oligomer may be used.
Although the molecular weight of the said curable monomer or oligomer is not specifically limited, For example, 200-10000 etc. are mentioned.

A photopolymerization initiator is usually added to the ionizing radiation curable monomer or oligomer. Examples of the photopolymerization initiator include 2,2-dimethoxy-2-phenylacetophenone, acetophenone, benzophenone, xanthone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4′-dimethoxybenzophenone, benzoinpropyl ether, benzyl Dimethyl ketal, N, N, N ′, N′-tetramethyl-4,4′-diaminobenzophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, other thioxanthates Compound etc. are mentioned.
Further, the scratch-preventing layer 53 may contain components other than the resin component. Examples of the components include solvents, leveling agents, fine particles, fillers, dispersants, plasticizers, ultraviolet absorbers, Surfactants, antioxidants, thixotropic agents, antifungal agents, antifouling agents and the like can be mentioned. Examples of the antifouling property-imparting agent include silicone resins and fluororesins.
Although the thickness of the damage prevention layer 53 is not specifically limited, For example, they are 1 micrometer-100 micrometers, Preferably they are 5 micrometers-70 micrometers, More preferably, they are 10 micrometers-50 micrometers.

[Suction part]
On the back surface of the sheet main body 1, as shown in each drawing, a suction portion 2 is provided.
The suction part 2 may be provided in a solid shape on the back surface of the sheet body 1 (not shown). In the example of illustration, the adsorption | suction part 2 is not provided in the whole back surface of the sheet | seat main body 1, but is provided in the back surface of the sheet | seat main body 1 partially. That is, the back surface of the sheet body 1 is partially exposed on the back surface of the floor sheet A.
In addition, in order to illustrate the formation range of the adsorption | suction part 2 intelligibly, in FIG. 2, the adsorption | suction part 2 is shaded for convenience.
In the example of illustration, the adsorption | suction part 2 consists of several convex parts protrudingly provided from the back surface of the sheet | seat main body 1, for example, consists of several convex parts of the planar view band shape projected perpendicularly from the back surface of the sheet | seat main body 1. . Each of the belt-like suction portions 2 extends in the first direction of the sheet body 1, and the plurality of suction portions 2 are arranged in parallel substantially in the second direction of the sheet body 1. In the floor sheet A formed in a substantially rectangular shape in plan view, the first direction may be the longitudinal direction as in the illustrated example, the short direction, or the direction inclined with respect to the longitudinal direction. But you can.

Although not particularly illustrated, the belt-like suction part 2 may be formed in a planar view wave shape or a meandering shape. By forming in a wave shape or a meandering shape in this way, the adsorbing portions 2 are also present at the both side edges in the second direction of the sheet body 1, and the end portions can be prevented from floating. Moreover, the adsorption | suction part 2 may be formed in dot shapes, such as a substantially circular shape, a substantially ellipse shape, a substantially triangular shape, and a substantially rectangular shape by planar view. Further, the suction portion 2 may be formed in a solid shape on the entire back surface of the sheet body 1. In addition, the said dotted | punctate adsorption | suction part 2 can be formed by screen printing, for example.
The cross-sectional shape of the adsorbing portion 2 formed of a convex portion is not particularly limited, and examples thereof include a substantially semi-elliptical shape as shown in FIGS. 3 and 16, a substantially semicircular arc shape, a substantially rectangular shape, and a substantially triangular shape. . When the floor sheet A is laid, it deforms uniformly and adheres well to the floor surface, so that the cross-sectional shape of the convex portion is preferably a substantially semi-elliptical shape or a substantially semi-arc shape. The cross-sectional shapes of the plurality of convex portions may all be the same, or the cross-sectional shapes of some of the convex portions may be different.

The height 2H of the convex portion (adsorption portion 2) is not particularly limited, but if it is too small, there is a possibility that the effect of preventing the deviation of the floor sheet A may not be obtained, and is, for example, 0.05 mm to 1 mm, preferably Is 0.1 mm to 0.5 mm. Note that the height 2H of the convex portion (suction portion 2) is a vertical length from the base of the convex portion to the apex of the convex portion, as shown in FIG.
The width 2W of the convex portion (suction portion 2) is not particularly limited, but it is possible to effectively prevent the displacement and slippage of the floor sheet A, and from the viewpoint of easily removing the laid floor sheet A from the floor surface. The width 2W of the (adsorption part 2) is preferably 1 mm to 20 mm, and more preferably 1.5 mm to 5 mm. In addition, when the planar view shape of the said convex part is strip | belt shape, and the width | variety is not uniform, the width 2W of the said convex part corresponds to the width | variety in the largest location. Similarly, in the case where the shape of the convex portion in plan view is another shape such as a dot shape, it is the width at the largest location.
The interval 2Y between the adjacent convex portions (adsorption portions 2) is not particularly limited, but it is possible to effectively prevent the displacement and slippage of the floor sheet A, and from the viewpoint of making it easier to remove the laid floor sheet A from the floor surface. The interval 2Y between the convex portions (suction portion 2) is preferably 1 mm to 5 mm, and more preferably 1 mm to 3 mm. The intervals 2Y between the convex portions may be different or the same. It is preferable that the intervals between the convex portions are the same because they are in close contact with the floor surface.
Further, the width 2W of the convex portion (suction portion 2) and the interval 2Y between the convex portions (suction portion 2) may be the same or either one may be large. In the example of illustration, the width 2W of a convex part is larger than the space | interval 2Y of a convex part.

If the adsorption | suction part 2 can adsorb | suck to a floor surface with sufficient contact | adhesion force of the grade which can prevent the slip of the floor sheet A, the formation material will not be specifically limited. Examples of the material for forming the adsorption portion 2 include materials that adsorb to the floor surface by adsorption or adhesion. The adsorbing part 2 by adsorption strongly adheres to the floor surface when a load is applied to the laid floor sheet A, so that the floor sheet A can be prevented from being displaced, and on the other hand, when the load is not applied, On the other hand, since it adheres weakly, the floor sheet A can be removed relatively easily. If the adsorption part 2 by adsorption is used, the release sheet B to which it is attached is in close contact with the adsorption part 2 during storage of the floor sheet A and is difficult to peel off. Can be easily peeled off.
For example, examples of the material for forming the adsorbing portion 2 adsorbed by the adsorption include flexible foamed resin and soft rubber. Examples of the material for forming the adsorbing part 2 adsorbed by the adhesion include a peel-up adhesive. In particular, as a material for forming the adsorption portion 2, a flexible foamed resin is preferable.

  The flexible foamed resin has a porous structure having a plurality of micropores on the back surface. The foamed resin may have either an open-cell structure or a closed-cell structure, but an open-cell structure is preferable because it has a sufficient suction cup function and exhibits a high adsorption force. The material of the foamed resin is not particularly limited, and examples thereof include thermoplastic resins such as acrylic resin, urethane resin, ethylene-vinyl acetate, polyvinyl alcohol, polyvinyl acetate, epoxy resin, acrylic ester, and polyester. From the viewpoint of excellent adhesion, it is preferable to use a foamed acrylic resin obtained by foaming an acrylic resin as the material for forming the adsorption portion 2. The foaming ratio of the foamed resin is not particularly limited, but is preferably 1.1 times to 6 times, more preferably 1.6 times to 2 times, from the viewpoint of sufficiently adhering to the floor and making it difficult to cause material destruction. Furthermore, 1.6 times or more and less than 2 times is particularly preferable.

[Release sheet]
The release sheet B is attached so as to face the back surface of the suction portion 2. The release sheet B is attached with an adhesive force that can be easily separated from the floor sheet A.
The release sheet B preferably has a shape and size that covers at least the entire back surface of the floor sheet A. For example, the release sheet B is formed in the same shape and size as the planar view shape of the floor sheet A. . The release sheet B may protrude from the side edge of the floor sheet A. In this case, the release sheet B having a larger area than the floor sheet A is used.
The release sheet B is preferably a sheet having water repellency.

For example, the release sheet B may be formed from a single sheet, or may be formed from a sheet having a multilayer structure. For example, the release sheet B having a multilayer structure includes a sheet and a release layer laminated on the entire surface of the sheet. The release layer is formed in a solid shape on the entire surface of the sheet. In this specification, that a certain layer is solid means that the material constituting the layer extends in the plane direction to form one continuous layer. The release layer can be typically formed by a method such as applying a release agent containing a silicone resin or the like to the surface of the sheet.
The sheet is not particularly limited, for example, a synthetic resin sheet such as polyester, polystyrene, or polypropylene; a laminated resin sheet in which a plurality of different or similar resin layers are laminated; synthetic paper; paper such as plain paper or fine paper; And a laminated sheet in which two or more kinds of sheets selected from the above are laminated. The thickness of the sheet is not particularly limited, and is, for example, 0.02 mm to 1 mm, preferably 0.02 mm to 0.3 mm, and more preferably 0.02 mm to 0.05 mm. Moreover, the thickness of a mold release layer is not specifically limited, For example, it is about 0.1 micrometer-3 micrometers.

[Use of floor sheet]
The floor sheet A of the present invention is used by laying on an existing floor surface or a new floor surface.
Examples of the existing floor surface include the surface of a floor material laid on the floor base surface, and the floor base surface that appears after the floor material is removed. Examples of the floor material include a wooden flooring material, a tile floor material, and a resin floor material. As the new floor surface, there is a floor base surface on which floor materials are not yet laid. The floor base surface includes a concrete base, a wooden base, a steel plate base, and the like. Since the adsorption force by the adsorption part 2 can be sufficiently obtained, the floor surface is preferably smooth.
The floor sheet A of the present invention provided with the adsorbing portion 2 can be laid only by placing it directly on the floor surface without using an adhesive or an adhesive.

The floor sheet A of the present invention includes a sheet body 1 having a bending rigidity toward the front surface side that is greater than a bending rigidity toward the back surface side.
Such a floor sheet A hardly floats in the vertical direction with respect to the floor surface, and can be laid on the floor surface satisfactorily. In particular, since the sheet body 1 has a downward curved shape at 23 ° C., it is difficult for the end portion of the sheet body 1 to lift from the floor surface after the floor sheet A is laid.

Furthermore, the floor sheet A of the present invention is easy to remove when removed from the floor surface.
Specifically, when the laid floor sheet A is removed from the floor surface, the end of the floor sheet A is raised, and the floor sheet A is lifted using this as a starting point.
As shown in FIG. 18, the conventional floor sheet bends greatly to the front surface side when the end is lifted, so that the floor sheet becomes a hairpin shape, and the peeling point that is the boundary between the back surface of the floor sheet and the floor surface advances. It is difficult to do so, and the pull-out distance at the end becomes long. For this reason, it takes time to remove the floor sheet.
On the other hand, as described above, the floor sheet A of the present invention has a large bending rigidity toward the surface side. Therefore, as shown in FIG. 18, it is difficult to bend toward the surface side when the end portion is lifted, and in a bent state. The floor sheet A is arcuate. For this reason, when one end is lifted, the peeling point, which is the boundary between the back surface of the floor sheet A and the floor surface, proceeds at a stretch toward the other end, so that the floor sheet A can be easily removed from the floor surface. .
As described above, the floor sheet A of the present invention can be easily detached from the floor surface, and the labor of the replacement work can be reduced.

In addition, generally as shown in FIG. 1, the substantially rectangular floor sheet whose length in the first direction is sufficiently larger than that in the second direction is troublesome to remove. In this regard, according to the floor sheet A of the present invention, when either one of the end portions in the first direction is lifted, the peeling point advances greatly in the first direction. However, it can be easily removed from the floor.
In particular, the floor sheet A has a substantially rectangular shape in plan view as described above, for example, the first direction length L1: the second direction length L2 is 2: 1 to 10: 1, preferably Is formed from 4: 1 to 8: 1, when one end in the first direction (longitudinal direction) is lifted, the floor sheet A bends and stretches moderately, so it can be easily removed from the floor. Can do. A particularly effective size is that the length L1 in the first direction × the length L2 in the second direction is in the range of 700 mm to 1200 mm × 100 mm to 200 mm, and preferably around 900 mm × 150 mm.

[Method for manufacturing floor sheet]
Next, the manufacturing method of the floor sheet A of this invention is demonstrated.
A floor sheet having a bending rigidity to the front surface side larger than the bending rigidity to the back surface side as in the present invention, the surface layer is formed of a material harder than the back surface layer, and the back surface layer is formed on the front surface side. It can be obtained by forming with a material softer than the layer. The surface layer is formed of a material harder than the back layer. For example, when the protective layer, which is the surface layer, is formed of a vinyl chloride resin, the amount of the plasticizer of the vinyl chloride resin. Or an ionizing radiation curable resin harder than the vinyl chloride resin of the protective layer may be used when forming the scratch-preventing layer which is a surface side layer. When the back side layer is formed of a material softer than the front side layer, when the back side layer is formed of vinyl chloride resin, the amount of plasticizer of the vinyl chloride resin is increased, or And foaming the side layer.
However, the floor sheet A of the present invention is not limited to those manufactured by the following manufacturing method, and can be manufactured by other manufacturing methods.

For example, the floor sheet A shown in FIG. 16 will be described as an example.
This manufacturing method includes a step of preparing a glass sheet with a resin, a decorative layer is laminated on the surface of the glass sheet with resin, a back side resin layer is laminated on the back surface of the glass sheet with resin, heat-pressed, and a decorative layer And a step of integrating the glass sheet with resin and the backside resin layer, and may have other steps as necessary.
Lamination and integration of the decorative layer, the glass sheet with resin, and the back side resin layer may be performed simultaneously or sequentially. Examples of the lamination and integration include the following procedures (1) to (3).
(1) A laminated body including a laminate of a decorative layer, a glass sheet with a resin, and a backside resin layer is heated and pressed to be integrated.
(2) The first laminate including the laminate of the decorative layer and the glass sheet with resin is integrated by heating and pressurization, and further, the second laminate including the laminate of the first laminate and the back resin layer is heated and pressurized. Integrate.
(3) The first laminate including the back side resin layer and the glass sheet with resin is integrated by heating and pressurizing, and further, the second laminate including the stack of the first laminate and the decorative layer is heated and pressurized. Integrate.

  In a specific embodiment, a protective layer, a base material layer, and the like are laminated in addition to the decorative layer, the glass sheet with resin, and the backside resin layer. The lamination of these protective layers and the like is performed in the above (1) to (3 ), A decorative layer such as (1) to (3), or a glass sheet with resin. And it may be appropriately performed before or after the lamination and integration of the backside resin layer.

<Preparation process of each layer>
A glass sheet with a resin is prepared by attaching a bonding resin to the glass sheet.
As the glass sheet, the above glass nonwoven fabric or glass woven fabric (preferably glass nonwoven fabric) is used.
The method of attaching the bonding resin to the glass sheet is not particularly limited, and a coating method in which the bonding resin is applied to the glass sheet using various coaters such as a roll coater and a knife coater, and the glass sheet is applied to the resin tank filled with the bonding resin. Examples thereof include a dipping method for passing through, a combination of the coating method and the dipping method.

For example, the bonding resin is applied using a roll coater. Coating using a roll coater is, for example, a bonding resin supplied to an applicator roll by inserting the glass sheet between an applicator roll and a doctor roll arranged in the middle of conveying a long belt-like glass sheet. Is applied to the surface of the glass sheet. The bonding resin applied to the surface of the glass sheet travels through the surface of the glass fiber and moves through the opening of the glass sheet, and also adheres to the back side of the glass sheet.
By appropriately adjusting the viscosity of the bonding resin, the supply amount of the bonding resin to the applicator roll, the distance between the applicator roll and the doctor roll, the adhesion amount of the bonding resin to the glass sheet can be set to a desired range.

The bonding resin is not particularly limited, but a vinyl chloride resin, particularly a resin material mainly composed of a paste vinyl chloride resin is preferable. The viscosity of the bonding resin whose main component is a paste vinyl chloride resin is, for example, 100 mPa · s to 10,000 mPa · s, and preferably 400 mPa · s to 2,000 mPa · s. By using a paste vinyl chloride resin having such a viscosity, it can be satisfactorily adhered to the glass sheet. In the present specification, the viscosity is a viscosity at 20 ° C., and is a value measured at 60 rpm using a BM viscometer.
The paste vinyl chloride resin includes a plasticizer. Specifically, the paste vinyl chloride resin preferably contains 50 parts by mass to 150 parts by mass of a plasticizer with respect to 100 parts by mass of the vinyl chloride resin, and in addition to the plasticizer, Those containing 1 part by mass to 10 parts by mass of additives other than those are more preferable.

Separately, a protective layer, a decorative layer, a back side resin layer, and a back side base material layer are prepared.
The method for forming these layers is not particularly limited, and can be appropriately selected depending on the material for forming them. Examples thereof include a calendering method, a melt extrusion method, and a solution casting method.

<Lamination process>
A decorative layer is laminated on the surface of the glass sheet with resin, and a back side resin layer is laminated on the back side of the glass sheet with resin. Further, a protective layer is laminated on the surface of the decorative layer, and the back side is on the back side of the back side resin layer. Each layer is integrated by heating and pressing between a pair of rolls while laminating the base material layers.
Examples of the bonding method of each layer by heat and pressure include a laminating method, a calendering method, and a continuous pressing method. For example, if the lamination method, the heating temperature is 160 ° C. to 200 DEG ° C., the pressure between the rolls ^{is 20kgf / cm 2 ~100kgf / cm 2} .
You may emboss the surface or back surface of the said laminated body as needed.

<Scratch prevention layer forming process>
Using a roll coater or the like on the surface of the laminate, for example, by applying an ionizing radiation curable monomer or oligomer (material for forming an anti-scratch layer) and applying ionizing radiation to prevent the outermost surface from being scratched A sheet body in which a layer is formed is obtained.

<Adsorption part formation process>
An adsorption portion is formed on the back surface of the obtained sheet main body.
For example, an acrylic ester copolymer emulsion is used as a resin component, and an adsorbing part is formed by adding an appropriate amount of an auxiliary agent such as a crosslinking agent, a filler, a foaming agent, a thickener, and a water repellent to the emulsion. Prepare the material. This is foamed by stirring and foaming while blowing air with a foaming machine. The obtained foam-forming material contains bubbles, has viscosity and adhesiveness, and has microbubbles even after drying.

The foam-forming material thus obtained is applied to the back surface of the sheet body using a rotary screen coating machine or the like. In order to form a plurality of adsorbing portions composed of convex portions, the foam-forming material is applied in an uneven shape. For example, in the middle of a coating machine, a doctor blade with a plurality of notches formed on the back surface of the sheet main body, and the sheet main body coated with foam forming material is conveyed at a predetermined speed. The coating layer of the foam-forming material that has passed through is uneven. Thereafter, the foam-forming material is passed through a dryer, dried at 120 ° C. to 200 ° C. for about several minutes, and then cooled to obtain the floor sheet of the present invention.
The obtained long belt-like floor sheet is wound up on a roll as needed, and used for storage and transportation. In addition, when the floor sheet of the present invention is formed into a single sheet, the long belt-like floor sheet is cut into an appropriate size by punching, cutting, etc., and stacked for storage and transportation. Is done.

[Modification]
In the floor sheet with a release sheet of the above embodiment, the release sheet B is composed of one sheet. For example, as shown in FIGS. 19 and 20, the release sheet B attached to one floor sheet A. However, it may be divided into two or more. In FIG. 20, the layer structure of the sheet body 1 is not shown (the same applies to FIG. 21).
In the illustrated example, by forming a cutting line 9 extending in the first direction in the middle of the second direction in the plane of the release sheet B made up of one sheet, the release sheet B becomes the first sheet B1 and The sheet is divided into second sheets B2. In this case, the release sheet B is divided into two in the second direction.

  Although not particularly illustrated, the release sheet B may be divided into three or more in the second direction by forming a plurality of cutting lines on the release sheet B. Furthermore, the release sheet B may be divided into two or more in the first direction by forming the cutting line in the second direction. In addition, the cutting line is not limited to being formed in parallel with the first direction (or the second direction) as described above, and may be formed so as to be inclined with respect to the first direction (or the second direction). Furthermore, the cutting line is not limited to a straight line shape in a plan view, and may be formed in a non-linear shape such as a wave shape in a plan view or a zigzag shape.

When the release sheet B of the present modification is divided at the cutting line 9 and the floor sheet with the release sheet is curved, the corner B1a of the first sheet B1 and the corner B2a of the second sheet B2 are It can be easily picked and the first sheet B1 and the second sheet B2 can be easily peeled off.
Further, as shown in FIG. 21, a region 8 that does not have the adsorbing portion 2 is formed at portions corresponding to the cutting line 9 and the vicinity of both sides thereof, and the release sheet B is formed in the region 8 in the region 8. You may make it face the back surface. In such a floor sheet with a release sheet, the first sheet B1 and the second sheet B2 in the vicinity of the cutting line 9 do not adhere to the adsorbing portion 2, so that the first sheet B1 and the second sheet B2 are more easily peeled off. This is preferable.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

[Materials used]
・ Polyester non-woven fabric with adsorption acrylic foam (manufactured by Sun Chemical)
The polyester nonwoven fabric with adsorbed acrylic foam has a polyester nonwoven fabric having a width of 193 cm, a length of 900 cm, and a basis weight of 100 g / m ² and an acrylic resin foam (foaming ratio: 1) provided on one surface of the nonwoven fabric. .95 times). As shown in FIG. 2, the adsorbing portion has a belt-like shape in a plan view extending in the longitudinal direction (250 cm direction), and has a substantially semi-elliptical shape in sectional view as shown in FIG. The width of one suction part (convex part) was 3.0 mm, and the interval between adjacent suction parts (interval between convex parts) was 1.0 mm. Moreover, the basis weight of the adsorption part was 150 g / m ² .
First glass sheet Non-woven glass (trade name “Grabest” manufactured by Olivest Co., Ltd.). Width: 193cm, length: 3000m. Glass fiber thickness: diameter of about 18 μm, glass fiber length: about 25 mm, basis weight: 30.42 g / m ² . The air permeability of this glass nonwoven fabric was 370 cc / cm 2 · sec.
Second glass sheet Non-woven glass (trade name “Grabest” manufactured by Olivest Co., Ltd.). Width: 193cm, length: 3000m. Weight per unit area: 50 g / m ² .

-First paste vinyl chloride resin Kaneka's trade name "Kane Vinyl". Degree of polymerization: 1150, K value: 69.
-Second paste vinyl chloride resin The trade name “Kane Vinyl” manufactured by Kaneka Corporation. K value: 94.
・ Third Paste Vinyl Chloride Resin Trade name “Kane Vinyl” manufactured by Kaneka Corporation. K value: 68.
-Suspension vinyl chloride resin The product name "Kane Vinyl" manufactured by Kaneka Corporation. Degree of polymerization: 1050, K value: 67.
・ Printing sheet (made of letterpress film)
The printed sheet has a width of 192 cm, a length of 500 m, a thickness of about 12 μm, a vinyl chloride film, and a design printing layer having a thickness of about 1 μm formed on the film using a known ink by a known printing method. And consist of

[Example 1]
The viscosity of the paste vinyl chloride resin was adjusted to 1000 mPa · s by mixing a plasticizer (dioctyl phthalate) with the first paste vinyl chloride resin. The viscosity was measured at 20 ° C. and 60 rpm using a BM viscometer (trade name “Bisco Tester”) manufactured by Rion Co., Ltd. (viscosity is the same as in Examples 2 and 3).
By applying a paste vinyl chloride resin of the above viscosity to the surface of the first glass sheet using a general-purpose roll coater so that the basis weight of the resin is 20 g / m ² , A glass sheet was prepared.
When this glass sheet with resin was observed from the surface side, it had an opening in the thickness direction, and the air permeability was 320 cc / cm ² · sec. Moreover, it was about 0.28 mm when the thickness of the glass sheet with resin was measured.
In addition, the measurement of each air permeability of the glass sheet (glass nonwoven fabric) and the glass sheet with resin was performed as described above.

Separately, the suspension vinyl chloride resin is calendered using a general-purpose calender molding machine to produce a resin layer having a width of 193 cm, a length of 3000 m, and a thickness of 0.2 mm, which is used as a protective layer. It was.
Similarly, a resin layer having a width of 193 cm, a length of 3000 m, and a thickness of 1.0 mm was produced by extruding the suspension vinyl chloride resin, and this was used as a back side resin layer.

In order from the front side to the back side, a protective layer, a printing sheet, a glass sheet with resin, a back side resin layer, and a polyester nonwoven fabric with adsorption acrylic foam are layered, and the laminated body is heated to 150 ° C. with a preheater, and then laminated. By passing the body between upper and lower laminate rolls at 50 ° C., a floor sheet having a thickness of about 2 mm was produced. In addition, the glass sheet with resin is laminated with the resin coated surface facing the printed sheet side, and the polyester nonwoven fabric with adsorption acrylic foam has the surface opposite to the surface where the adsorption part is formed facing the back resin layer side. Laminated. The materials having a short length were laminated while adding a plurality of materials in the length direction (the same applies to other examples). Moreover, the conveyance speed of the laminated body was about 7 m / min, and the pressure applied to the laminated body was 35 kgf / cm ² . In this way, a floor sheet having a layer structure as shown in FIG. 16 (however, an anti-scratch layer was not formed) was obtained.

[Example 2]
By mixing a filler (calcium carbonate), a plasticizer (dioctyl phthalate), and a stabilizer (Ba-Zn stabilizer) with the second paste vinyl chloride resin, a paste vinyl chloride having a viscosity of 12000 mPa · s. System resin (X1) was prepared.
By mixing a filler (calcium carbonate), a plasticizer (dioctyl phthalate), and a stabilizer (Ba-Zn stabilizer) with the third paste vinyl chloride resin, a paste vinyl chloride having a viscosity of 8000 mPa · s. System resin (X2) was prepared.
By mixing a filler (calcium carbonate), a plasticizer (dioctyl phthalate), and a stabilizer (Ba-Zn stabilizer) with the second paste vinyl chloride resin, a paste vinyl chloride having a viscosity of 3000 mPa · s. System resin (X3) was prepared.

Paste vinyl chloride resin (X1) was applied in layers on a polyester nonwoven fabric (trade name “Spunbond” manufactured by Asahi Kasei Corporation. Spunbond type, basis weight: 50 g / m ² ), and the applied resin A second glass sheet was placed on the layer and brought into close contact therewith, and gelled at 200 ° C. to produce a laminate. This laminated body was polyester nonwoven fabric / back side resin layer / second glass sheet in order from the back surface side to the front surface side, and the thickness thereof was 1.2 mm.
The paste vinyl chloride resin (X2) was applied in a layer form with a thickness of 0.5 mm on the second glass sheet of the laminate, and pregelled at 140 ° C to 150 ° C. Furthermore, on the pregelatinized 0.5 mm front side resin layer, a printing sheet (this printing sheet is a vinyl chloride film having a thickness of about 0.13 mm and a known ink by a known printing method on the film). And a design printed layer having a thickness of about 130 μm formed on the printed sheet, and a paste vinyl chloride resin (X3) is applied on the surface of the printed sheet in a layer form with a thickness of 0.15 mm. A floor sheet was obtained by gelation.
The layer structure of the floor sheet of Example 2 is, in order from the back surface side to the front surface side, a laminate having a thickness of 1.2 mm / a front resin layer having a thickness of 0.5 mm / a decorative layer having a thickness of about 0.13 mm / a thickness of 0.15 mm. It is a protective layer.

[Example 3]
The suspension vinyl chloride resin was extrusion molded to produce a resin layer having a width of 193 cm, a length of 3000 m, and a thickness of 1.0 mm.
In order from the front side to the back side, a printing sheet (this printing sheet is formed from a vinyl chloride resin sheet having a width of 192 cm, a length of 500 m and a thickness of 0.35 mm, which is calendered using a general-purpose calender molding machine. The resin layer having a thickness of 1 mm and a polyester non-woven fabric (manufactured by Hirohashi Co., Ltd.) are passed between the upper and lower laminating rolls at 50 ° C. to form a floor sheet having a thickness of about 2 mm. Produced. The conveyance speed of the laminated body was about 7 m / min, and the pressure applied to the laminated body was 35 kgf / cm ² .
The layer structure of the floor sheet of Example 3 is polyester nonwoven fabric / resin layer / decorative layer in order from the back surface side to the front surface side.

[Comparative Example 1]
The trade name “One Raku Floor” manufactured by Nagai Co., Ltd. was used as the floor sheet of Comparative Example 1.

[Comparative Example 2]
The product name “Hospurime NW” manufactured by Toli Co., Ltd. was used as the floor sheet of Comparative Example 2.

[Bending test]
About the floor sheet of each Example and a comparative example, the bending rigidity to the surface side and the bending rigidity to the back surface side were evaluated by the amount of droop measured according to the following measuring method.
Each floor sheet was cut into a width of 5 cm and a length of 30 cm to obtain a sample piece, which was then placed in a constant temperature room at 23 ° C. and a humidity of 50% RH and left for 24 hours.
Separately, as shown in FIG. 22A, a pedestal for measurement and a ruler were prepared. The pedestal has a height of 20 cm, a rectangular parallelepiped having a sufficiently larger area than the sample piece, and is composed of a pair of left and right. The right pedestal can be moved toward and away from the left pedestal.

<Measurement of bending rigidity to the surface side (amount of drooping to the surface side)>
Place the sample piece with the surface side facing the surface side of the pedestal at 23 ° C, the left side of the 10 cm long sample piece on the left pedestal and the right side of the 20 cm long sample piece straddling the right pedestal (Refer to (b) in the figure).
As shown in Fig. 5 (c), a fixing weight is placed on the left surface of the sample piece, the right pedestal is removed from the left pedestal, and after 30 seconds, the amount of drooping on the right side of the sample piece is measured. Measured with. The amount of drooping was the linear length between the surface of the base and the lower right corner of the sample piece. In this case, since the sample piece bends to the surface side, the drooping amount becomes the bending rigidity to the surface side.

<Measurement of bending rigidity to the back side (hanging amount to the back side)>
The amount of droop was measured in the same manner as in <Measurement of bending rigidity to the front surface> except that the surface of the sample piece placed on the pedestal was changed to the back surface. In this case, since the sample piece bends to the back side, the amount of droop becomes the bending rigidity to the back side.
It should be noted that the smaller the droop amount, the greater the bending rigidity (harder), and the greater the droop amount, the smaller the bending stiffness (softer).
In addition, the floor sheets of Examples 2 and 3 are not provided with an adsorbing portion on the back surface, but the adsorbing portion used in Example 1 is made of a very flexible foam and is very soft and substantially. Since the bending rigidity of the floor sheet is not affected, the bending rigidity of the floor sheets of Examples 2 and 3 can be evaluated in the same manner as the floor sheet provided with the suction portion.
The measurement results are shown in Table 1.

[Characteristics of floor sheet]
Two floor sheets of Example 1 were prepared and laid on the concrete floor surface with the adsorbing portion facing the floor surface and butting the end portions of the two floor sheets.
By visually observing the floor sheet of Example 1 after laying, the unevenness following property and the joint concealing property were evaluated.
The evaluation of the non-land followability is based on whether or not the floor sheet follows the unevenness (unevenness) of the floor surface, and further based on whether or not the non-land surface can be seen from the surface of the floor sheet. The evaluation of joint concealment was based on whether or not the end face (thickness face) was visible at the butt end of the two floor sheets.
Next, the floor sheet laid on the floor surface was rolled up from the end, and peelability (ease of peeling) was evaluated.
The floor sheets of other examples and comparative examples were also laid on the floor in the same manner, and the unevenness following property, joint concealing property and peelability were evaluated.
The results are shown in Table 1.

[Evaluation]
In Examples 1 to 3 in which the bending rigidity to the front surface side is larger than the bending rigidity to the back surface side, that is, it is difficult to bend to the front surface side, the peelability is excellent. It can be seen that it is difficult to peel from the surface. In particular, as in Example 1, when the surface is bent moderately and the difference in the amount of drooping exceeds 40 mm, the peelability is very good.
Moreover, Examples 1 thru | or 3 are excellent in the unevenness | trackability followability and joint-hiding property compared with Comparative Examples 1 and 2. In particular, as in Examples 1 and 3, when the amount of drooping on the back surface side exceeds 115 mm, the joint concealing property is also good.

A Floor sheet B Release sheet 1 Sheet body 1a, 1b End of sheet body 2 Adsorption part 3 Back layer 4 Intermediate base material layer 5 Surface layer

Claims (3)

A sheet main body, and an adsorption portion provided on the back surface of the sheet main body and adsorbed to the floor surface,
A floor sheet whose bending rigidity toward the front side is greater than bending rigidity toward the back side.   The floor sheet according to claim 1, wherein the adsorption portion is formed of a foamed resin.   The floor sheet according to claim 1 or 2, wherein the sheet main body has a resin layer containing a soft synthetic resin and a scratch-preventing layer containing a curable resin provided on the surface side of the resin layer.

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