JP6934713B2 - Flooring method - Google Patents

Description

The present invention relates to a method for producing a flooring material.

The flooring material made of vinyl chloride is composed of, for example, a transparent vinyl chloride surface layer, a printing layer, a vinyl chloride resin layer, and a base material layer laminated in this order.
The required quality as a flooring material is abrasion resistant, and in ordinary commercial flooring materials, the thickness of the transparent vinyl chloride surface layer is about 0.3 mm, but in general, when used for heavy walking, the surface It is necessary to improve the wear resistance by setting the layer thickness to 0.5 mm or more.
Further, in a so-called cushion floor material that is required to have cushioning properties as a flooring material, a foamed layer in which a vinyl chloride resin layer is foamed is formed to impart cushioning properties (see, for example, Patent Document 1). ).

Japanese Unexamined Patent Publication No. 61-57271

The transparent vinyl chloride surface layer can be obtained, for example, by mixing a vinyl chloride resin, a plasticizer, a stabilizer, and other additives, and molding the surface layer into a sheet by various methods. As a method of forming a vinyl chloride sheet, the material is made into a paste (vinyl chloride resin paste), applied, and then heat-cured (gelled) to form a sheet. The material is kneaded with a kneader. It is common to use calendar molding, in which the agglomerated resin mixture is stretched while kneading between a plurality of heating rolls to form a sheet, and extrusion molding, in which the material is kneaded and melted in a cylinder and extruded from a mouthpiece to form a sheet. be.
In this way, the surface layer can be formed by gelling the vinyl chloride resin paste, but if the thickness is 0.5 mm or more by paste processing to secure the wear-resistant layer, it becomes a turbid translucent layer. Therefore, the visibility of the print layer was inferior.
On the other hand, for flooring materials, when a transparent vinyl chloride surface layer is made by calendar processing, it is easy to obtain a sheet with high transparency even if it is thick, so transparency is ensured by laminating a calendar sheet made in advance. It is conceivable that the printing layer is bonded to the printing layer by heat laminating or adhered with an adhesive.
In these cases, there is a problem of adhesiveness between the calendar sheet and the printing layer, or there is a problem that the solvent in the adhesive volatilizes and bubbles are generated, so that the calendar sheet and the printing layer are easily peeled off.
Further, the surface layer is formed with irregularities by various methods such as a chemical embossing method and a mechanical embossing method. In the case of the mechanical embossing method, the surface is heated and softened and a squeezed pattern is mechanically formed with a convex roll. However, as a surface layer that enables such a mechanical embossing method, the surface layer is easily softened by heat and has a relatively low degree of polymerization. A vinyl chloride calendar sheet is used, but in the case of a cushion sheet with foaming, the foaming agent decomposition gas at the time of foaming is mixed with the calendar sheet, and the mixed bubbles make it turbid and the transparency is lowered.
Therefore, it is necessary to use a calendar sheet that can prevent bubbles from being mixed due to foaming, and there is a problem that the degree of polymerization of the vinyl chloride resin of the calendar sheet that can be used is limited. That is, in order to facilitate mechanical embossing in the uneven processing by the mechanical embossing method after foaming, it is desirable to use "a vinyl chloride resin having a relatively low degree of polymerization that is easily heat-softened", but on the other hand, before mechanical embossing. In the foaming stage, if a vinyl chloride resin having a degree of polymerization lower than that of the vinyl chloride resin in the foamed resin layer is used, the foaming agent decomposition gas at the time of foaming is mixed with the transparent resin, and the transparency is impaired. The degree of polymerization of the vinyl chloride resin used for the foam layer is about 1000 to 1500, but the degree of polymerization of a suitable positive vinyl chloride resin in calendar processing is about 1000, which is lower than the degree of polymerization of the resin used for the foam layer, and at the time of foaming. The problem of transparency due to gas mixing becomes a problem.

The present invention has been made in view of the above problems and the present situation, and an object of the present invention is to provide a method for manufacturing a flooring material capable of ensuring higher durability wear resistance and transparency.

The method for manufacturing a flooring material according to the first aspect of the present invention that solves the above problems is
A transparent first vinyl chloride resin sheet layer and
With a transparent adhesive layer,
The print layer on which the design is printed and
The second vinyl chloride resin layer and the base material layer are laminated in this order ,
The transparent adhesive layer is formed of a vinyl chloride resin paste and is formed from a vinyl chloride resin paste.
The second vinyl chloride resin layer is a method for producing a flooring material composed of a foam layer.
The first step of applying the vinyl chloride resin paste to the surface of the base material layer and gelling it into a second vinyl chloride resin layer, and
A second step of printing on the surface of the second vinyl chloride resin layer gelled in the first step to form a print layer, and
A vinyl chloride resin paste to be a transparent adhesive layer is applied to the surface of the printing layer, a transparent vinyl chloride sheet to be a surface layer is laminated on the surface, and the vinyl chloride resin paste is gelled by heat-pressing. At the same time, the third step of fixing to the transparent vinyl chloride resin sheet and
Following the third step, a fourth step of heat-treating the flooring material is provided.
The second vinyl chloride resin layer is formed by applying a vinyl chloride resin paste containing a foaming agent, and is gelled in the first step.
In the fourth step, the foaming agent contained in the gelled vinyl chloride resin layer is thermally decomposed to form a vinyl chloride foam layer, and the degree of polymerization of the vinyl chloride resin forming the transparent adhesive layer is determined. second magnitude than the polymerization degree of the vinyl chloride resin of the vinyl chloride resin layer Kushida,
It is characterized by that.

According to the present invention, a transparent adhesive layer made of the same material as the first vinyl chloride resin layer is laminated between the first vinyl chloride resin layer and the second vinyl chloride resin layer for normal business use. The thickness of the first vinyl chloride resin layer can be increased as compared with the cushion floor, and more durable abrasion resistance and transparency can be ensured.

Is a schematic schematic sectional view of a flooring material be manufactured by the method of manufacturing the flooring of the present invention. It is a schematic flow diagram of one embodiment of a manufacturing method of the flooring of the present invention.

Hereinafter, an embodiment of the method for producing a flooring material of the present invention will be described in detail with reference to the drawings.
The flooring material 10 of the present invention is based on a transparent first vinyl chloride resin sheet layer 11, a transparent adhesive layer 12, a printing layer 13 on which a pattern design is printed, a second vinyl chloride resin layer 14, and a base. The flooring material is a flooring material in which the material layer 15 and the material layer 15 are laminated in this order, and the transparent adhesive layer 12 is formed of a vinyl chloride resin paste. Further, when the floor material 10 is a cushion floor material 10A having cushioning properties, the second vinyl chloride resin layer 14 is composed of a foam layer 14A.
That is, the floor material 10 is formed by laminating a transparent first vinyl chloride resin sheet layer 11 on the surface of the printing layer 13 via a transparent adhesive layer 12 made of a vinyl chloride resin paste, and is composed of the first vinyl chloride. The thickness of the resin sheet layer 11 can be set to have the required wear resistance, the transparency can be ensured, and the adhesiveness can be ensured by the transparent adhesive layer 12.
Further, in the cushion floor material 10A, when cushioning property is imparted, the influence of the decomposition gas of the foaming agent can be suppressed by the transparent adhesive layer 12, so that it is effective for mechanical embossing after foaming on the first vinyl chloride resin sheet. A vinyl chloride resin sheet having a low degree of polymerization can be used. As a result, suitable drawing can be performed by mechanical embossing, and the thickness of the first vinyl chloride resin sheet layer 11 can be made to have the required wear resistance, and transparency can be ensured by the transparent adhesive layer 12. Adhesiveness can also be ensured.
In the following embodiment, the cushion flooring material 10A will be mainly described as an example.

The transparent first vinyl chloride resin sheet layer 11 is a wear-resistant layer for ensuring wear resistance when used as a floor material 10 or a cushion floor material 10A.
Normally, the seat layer 11 has a thickness of about 0.2 to 0.4 mm, and a normal commercial cushion floor has a thickness of about 0.3 mm, but it is resistant to heavy walking. In the wear layer, the thickness of the sheet layer 11 is set to 0.5 mm or more, high durability and wear resistance can be obtained, and the calendar sheet is made of a transparent vinyl chloride resin so that the pattern can be seen through. ..
The first vinyl chloride resin sheet layer 11 limits the degree of polymerization of the vinyl chloride resin because it is necessary to prevent air bubbles from being mixed by the decomposition gas of the foaming agent due to the foaming of the foaming layer 14A in the conventional cushion floor material 10A. However, in the present application, as will be described later, by interposing the transparent adhesive layer 12, a vinyl chloride resin having a degree of polymerization generally used as a calendar sheet can be used without being limited by the degree of polymerization. (For example, the degree of polymerization is about 1000).
The sheet layer 11 is subjected to mechanical embossing, mechanical embossing, or surface treatment alone, as an uneven processing that matches the pattern of the cushion floor material 10A.
The surface treatment includes, for example, an antifouling treatment for making it difficult for the surface of the sheet layer 11 to get dirty, a treatment for imparting scratch resistance, anti-slip property, and the like. As the surface treatment, for example, a paint made of an acrylic resin, a urethane resin, or the like is applied, and a resin layer crosslinked and reinforced by an electron beam, ultraviolet rays, or the like is provided as the surface treatment layer.

The transparent adhesive layer 12 is formed of a vinyl chloride resin paste and is made transparent.
The transparent vinyl chloride resin paste is a paste obtained by mixing a vinyl chloride resin, a plasticizer, a stabilizer, and other additives.
As the vinyl chloride resin, the vinyl chloride resin alone may be used, or a copolymer such as a vinyl chloride-vinyl acetate copolymer, a vinyl chloride-ethylene copolymer, or a vinyl chloride-acrylic copolymer can also be used.
As the plasticizer, a phthalic acid-based plasticizer such as dioctyl phthalate (DOP) and diisononyl phthalate (DINP), an adipic acid-based plasticizer such as diisononyl adipate (DINA), and the like can be used. May be used alone, or a phthalic acid-based plasticizer and an adipic acid-based plasticizer may be mixed and used.
As the stabilizer, barium-based, potassium-based, zinc-based and the like can be used.
In addition, if necessary, general additives such as flame retardants and antioxidants to be blended in ordinary vinyl chloride resin pastes can be added.

The transparent adhesive layer 12 uses a transparent vinyl chloride resin paste as an adhesive layer and is uniformly applied to the surface of the print layer 13 with a thickness of 0.05 to 0.3 mm, preferably about 0.1 to 0.15 mm. It is formed. The transparent adhesive layer 12 is made transparent by applying a vinyl chloride resin paste on the surface of the printing layer 13 and laminating a transparent first vinyl chloride resin sheet layer 11 before gelling, and then using a heat-bonding roll. By heat-pressing the first vinyl chloride resin sheet layer 11, the vinyl chloride resin paste is gelled and at the same time fixed to the first vinyl chloride resin sheet.
As a result, the transparent first vinyl chloride resin sheet layer 11, the transparent adhesive layer 12, the printing layer 13, the vinyl chloride resin layer 14, and the base material 15 are bonded in a laminated state. The transparent adhesive layer 12 uses a vinyl chloride resin paste of the same material as the sheet layer 11 of the first vinyl chloride resin having a transparent surface to ensure adhesiveness in thermal lamination or the like, and at the same time, it is laminated and heat-bonded. As a result, it can be gelled into an integrated state without boundaries. Further, by using the transparent adhesive layer 12, transparency can be ensured even if the thickness of the first vinyl chloride resin sheet layer 11 having a transparent surface is 0.5 mm or more for heavy walking, and the durability is high. A calendar sheet having excellent wear resistance can be used.
The transparent adhesive layer 12 has no limitation on the degree of polymerization of the vinyl chloride resin (for example, the degree of polymerization is about 1000) of the transparent first vinyl chloride resin sheet layer 11 on the surface thereof, but will be described later. There is a limit to the degree of polymerization of the vinyl chloride resin of the foam layer 14A, so that the degree of polymerization of the vinyl chloride resin of the transparent adhesive layer 12 is larger than the degree of polymerization of the vinyl chloride resin of the foam layer 14A. By doing so, the decomposition gas of the foaming agent generated by the foaming of the foaming layer 14A is prevented from being mixed into the transparent adhesive layer 12 as bubbles and the vinyl chloride resin of the transparent adhesive layer 12 becomes cloudy, and the transparency is improved. Secure.

The print layer 13 is formed by printing a pattern design, and prints a pattern on the floor material 10 or the cushion floor material 10A to impart the design.
In the floor material 10 and the cushion floor material 10A, for example, a white vinyl chloride resin paste constituting the second vinyl chloride resin layer 14 and the foam layer 14A was applied to the surface of the base material layer 15, gelled and solidified. After that, it is formed by direct printing by gravure printing or the like.
Chemical embossing can be performed by forming the second vinyl chloride resin layer 14 as a foaming layer 14A and forming the printing layer 13 with an ink containing a component that suppresses foaming or conversely promotes foaming.

The second vinyl chloride resin layer 14 is composed of a foam layer 14A in the cushion floor material 10A, and is composed of a vinyl chloride resin layer 14 containing no foaming agent in the floor material 10 that does not impart cushioning property.
The second vinyl chloride resin layer 14 can be formed by using the vinyl chloride resin paste. The vinyl chloride paste is the same as the transparent adhesive layer, but calcium carbonate, aluminum hydroxide, talc, silica, clay, calcium silicate, alumina and the like can be preferably used as the filler, and these can be used alone. Alternatively, a plurality of appropriate combinations may be used in combination.
As the foaming agent, a thermally decomposable type can be used, and examples thereof include azodicarbonamide (ADCA), azobisisobutyronitrile, benzenesulfonylhodrazide, paratoluenesulfonylhydrazide, dinitrosopentamethylenetetramine and the like. can.
That is, a vinyl chloride resin paste containing a foaming agent is applied to the surface of the base material layer 15 to gel it. In this gelled state, it is in an unfoamed state. Next, printing is performed on the surface of the vinyl chloride resin layer 14 containing the gelled foaming agent to form the printing layer 13. Further, a transparent adhesive layer 12 is provided on the surface of the print layer 13, and the first vinyl chloride resin sheet layer 11 is laminated. Finally, the laminated layers 11 to 15 are heat-bonded to be integrated, and then heat-treated (cured). In this final heat treatment step, the foaming agent of the vinyl chloride resin layer 14 containing the gelled foaming agent is heat-decomposed and gasified to obtain the foamed vinyl chloride resin foam layer 14A.

The vinyl chloride resin constituting the foam layer 14A has, for example, a degree of polymerization of 1200 to 1500.
When the sheet layer 11 of the first vinyl chloride resin is laminated on the surface of the foam layer 14A without passing through the transparent adhesive layer 12, the bubbles of the decomposition gas of the foaming agent accompanying the foaming are the first vinyl chloride resin. It mixes with the sheet layer 11 of.
Therefore, in order to prevent bubbles from being mixed in, the degree of polymerization of the vinyl chloride resin in the sheet layer 11 of the first vinyl chloride resin must be higher than the degree of polymerization of the foamed layer 14A. However, the degree of polymerization of the vinyl chloride resin used for general calendar processing is about 1000, and if the degree of polymerization is higher than that, the melt viscosity becomes high and the processability deteriorates. Moreover, even when the sheet layer 11 of the first vinyl chloride resin is mechanically embossed to form irregularities, if the degree of polymerization of the vinyl chloride resin is too large, it becomes difficult to soften and the irregularities are difficult to form.
On the other hand, in the present application, the first vinyl chloride resin sheet layer 11 is laminated on the surface of the foamed layer 14A of the vinyl chloride resin containing a foaming agent via the transparent adhesive layer 12, and is in contact with the foamed layer 14A. The layer becomes a transparent adhesive layer 12.
Therefore, even if the transparent adhesive layer 12 is made of a vinyl chloride resin paste and the degree of polymerization of the vinyl chloride resin is made larger than the degree of polymerization of the vinyl chloride resin constituting the foam layer 14A of 1200 to 1500, there is no problem in processability and the transparent adhesive layer 12 is transparent. It is possible to prevent air bubbles from being mixed into the adhesive layer 12, and the degree of polymerization of the first vinyl chloride resin sheet layer 11 is not limited at all.
As a result, the foaming gas accompanying the foaming in the foaming layer 14A is blocked by the transparent adhesive layer 12, does not reach the sheet layer 11 of the first vinyl chloride resin and is not mixed, and the decrease in transparency due to air bubbles is prevented. , Transparency can be ensured.
Further, the transparent adhesive layer 12 and the transparent first vinyl chloride resin sheet layer 11 are in an integrated state without boundaries in the cushion flooring materials 10 and 10A, which are products, and the wear resistance of the sheet layer 11 is ensured. Moreover, transparency can be ensured.

The base material layer 15 is composed of, for example, a glass fibrous base material layer. The glass fiber base material layer 15 is composed of, for example, a glass non-woven fabric and a binder resin. Glass nonwoven fabric, basis weight 10 to 100 g / m ^2, preferably weighing is a 20 to 60 g / m ^2, composed of a binder resin is bonded. As the binder resin, acrylic resin, vinyl acetate resin emulsion, ethylene-vinyl acetate copolymer resin (EVA) emulsion, polyvinyl alcohol resin, vinyl chloride resin emulsion, styrene-butadiene rubber (SBR) latex and the like can be used, and one type or the like can be used. One or more of them may be blended and used, and those having good adhesion to vinyl chloride resin are particularly preferable.
The glass fiber base material layer 15 is not limited to the case where the glass non-woven fabric is used, and may be a glass fiber base material layer 15 using a glass fiber woven fabric, and a binder resin or the like may be used. Any material may be used as long as it is smooth and can secure adhesiveness to the second vinyl chloride resin layer 14 laminated on the front surface and, if necessary, the back surface layer of vinyl chloride laminated on the back surface.

Next, manufacturing method of the flooring of the present invention will be described with reference to FIG.
The method for producing the floor material 10 is as follows: a first step 21 in which a vinyl chloride resin paste is applied to the surface of the base material layer 15 and gelled to form a second vinyl chloride resin layer 14, and a gel in the first step 21. The second step 22 of printing on the surface of the second vinyl chloride resin layer 14 to form the print layer 13 and the vinyl chloride resin paste to be the transparent adhesive layer 12 are applied to the surface of the print layer 13. A transparent vinyl chloride resin sheet (sheet layer 11) to be a surface layer is laminated on the sheet, and each of the laminated layers 11 to 15 is heat-bonded to gelate the vinyl chloride resin paste (transparent adhesive layer 12). At the same time, a third step 23 of fixing to the transparent vinyl chloride resin sheet (sheet layer 11) and a fourth step 24 of heat-treating the floor material 10 after the third step 23 are provided. It is composed.

Further, in the method for producing the cushion floor material 10A, the second vinyl chloride resin layer 14 is formed by applying a vinyl chloride resin paste containing a foaming agent and is gelled in the first step 21 to be gelled in the second step. In the fourth step 24 through the third steps 22 and 23, the laminated body of each layer 11 to 15 is heat-treated, and at the same time, the foaming agent contained in the gelled vinyl chloride resin layer is heat-decomposed to decompose the vinyl chloride foam layer. It is constructed by forming 14A.
For example, a continuous laminating device 30 is used as a method for manufacturing the floor material 10, heat laminating is performed by heat pressure bonding, and the cushion flooring material 10A as a product is wound by a take-up roll.

(1) First Step This is a step 21 in which a vinyl chloride resin paste is applied to the surface of the base material layer 15, gelled, and the second vinyl chloride resin layer 14 is laminated.
That is, a vinyl chloride resin paste (foaming) containing a foaming agent to be used as the second vinyl chloride resin layer 14 on the glass fiber base material layer 15 in which the base material (base material layer 15) is unwound (21-1). Layer 14A) is applied (21-2) and gelled. In this gelled state, it is in an unfoamed state. The degree of polymerization of the vinyl chloride resin in the second vinyl chloride resin layer 14 (foamed layer 14A) is 1200 to 1500.

(2) Second Step This is a step 22 of forming the print layer 13 by printing on the surface of the second vinyl chloride resin layer 14 (foam layer 14A) gelled in the first step 21.
A printing layer 13 on which a pattern design is printed is formed by printing with a gravure printing machine on the surface of a vinyl chloride resin layer containing a foaming agent that has been gelled and solidified before foaming (22).

(3) Third Step A vinyl chloride resin paste to be a transparent adhesive layer 12 is applied to the surface of the printing layer 13 (23-1), and a transparent vinyl chloride resin sheet (sheet layer) to be a surface layer is applied thereto. 11) are laminated (23-2), and the laminated layers 11 to 15 are heat-bonded to gel the vinyl chloride resin paste of the transparent adhesive layer 12, and at the same time, the transparent vinyl chloride resin sheet (sheet layer 11). It is a step 23 to fix with.
A vinyl chloride resin paste to be the transparent adhesive layer 12 is applied to the surface of the print layer 13 to a thickness of 0.1 mm, and a calendar sheet to be the first vinyl chloride resin sheet layer 11 is laminated before gelation and solidification. Will be done. The degree of polymerization of the calendar sheet to be the sheet layer 11 of the first vinyl chloride resin is, for example, 1000, and the thickness is 0.5 mm or more, which can secure the required wear resistance.
Further, the degree of polymerization of the vinyl chloride resin of the transparent adhesive layer 12 is set to a degree of polymerization larger than the degree of polymerization of the vinyl chloride resin of the second vinyl chloride resin layer 14 of 1200 to 1500 (for example, the degree of polymerization is 1600).

(4) Fourth Step Following the third step 23, there is a step 24 of heat-treating to obtain the flooring material 10.
Further, in the cushion floor material 10A, the foaming agent of the gelled second vinyl chloride resin layer 14 (foam layer 14A) is thermally decomposed (24-1) to form a foamed foam layer 14A, which is then wound up (24-). 2) Obtain a cushion flooring material 10A.
After the fourth step 24, the transparent first vinyl chloride resin sheet layer 11 can be mechanically embossed. By embossing the sheet layer 11 on the surface, unevenness matching the printed pattern design can be formed to improve the design, and the flooring material 10 is heat-bonded at the same time as each of the layers 11 to 15. Therefore, it can be efficiently manufactured without increasing the number of processes.
The heat treatment (cure: foaming step) of the fourth step is performed in a heating oven. Then, after being cooled once, only the surface is heated and softened with a heater to perform mechanical embossing.

Further, a back surface material of vinyl chloride can be laminated on the back surface of the base material layer 15. Further, when the sheet layer 11 of the first vinyl chloride resin is subjected to surface treatment or embossing, it may be performed after the fourth step 24.

Next, an example of the flooring material 10 of the present invention will be described together with a comparative example.
In the following examples, the adhesiveness and transparency of the transparent adhesive layer 12 constituting the cushion flooring material 10A were mainly evaluated, and the results are shown in Table 1.
(Example 1)
1) As a transparent vinyl chloride resin sheet layer (abbreviated as transparent layer in the table) 11, vinyl chloride resin (PVC) having a degree of polymerization of 1000: 100 parts by weight, plasticizer (DOP): 35 parts by weight, stabilizer. : A transparent vinyl chloride calendar sheet (abbreviated as calendar in the table) having a thickness of 0.5 mm and consisting of 5 parts by weight was used.
2) As a transparent adhesive layer (abbreviated as adhesive layer in the table) 12, vinyl chloride resin having a degree of polymerization of 1600: 100 parts by weight, plasticizer (DOP): 45 parts by weight, stabilizer: 2 parts by weight is mixed. A resin paste (abbreviated as PVC paste in the table) was used and applied with a thickness of 0.1 mm.
3) As the printing layer 13, printing was performed with a gravure printing machine to obtain the printing layer 13.
4) As the second vinyl chloride resin layer 14, a vinyl chloride resin paste containing a foaming agent was used to form a foam layer 14A. As the second vinyl chloride resin paste, a vinyl chloride resin having a degree of polymerization of 1400: 100 parts by weight, a plasticizer (DOP): 50 parts by weight, a stabilizer: 2 parts by weight, and calcium carbonate: 50 parts by weight are mixed. A paste-like product was used, and as a foaming agent, ADCA (azodicarbonamide): 2.5 parts by weight was used.
5) As the base material layer 15, a glass non-woven fabric: A glass non-woven fabric in which a binder resin was bonded with an acrylic resin was used ^{as a glass non-woven fabric weighing 60 g / m 2.}
Using these materials, the cushion flooring material 10A was manufactured by the first steps 21 to 4 described as the method for manufacturing the cushion flooring material 10A.
The obtained cushion flooring material 10A was evaluated for the following items.
1) The adhesive strength and appearance between the transparent vinyl chloride sheet layer 11 and the transparent adhesive layer 12 were evaluated.
In accordance with JIS A1454, a delamination strength test was performed to confirm the peeling position (at which interface the peeling occurs).
The adhesive strength was evaluated in two stages: ◯: no peeling, ×: interface peeling.
The appearance was visually evaluated on a three-point scale of: ◯: not including bubbles Δ: partially having bubbles ×: many bubbles (not applicable in the table).
2) Transparency was evaluated.
The appearance was visually evaluated on a three-point scale of: ◯: no design obstruction Δ: cloudy ×: no transparency.
For transparency, the haze value (device: spectrophotometer, manufacturer: manufactured by JASCO Corporation) was measured and evaluated.
The haze value was measured only with a film in which a transparent layer and an adhesive layer were laminated.
Table 1 shows the evaluation results based on the above evaluation criteria.
In the cushion flooring material 10A of Example 1, as is clear from Table 1, the adhesive strength, appearance, and transparency were all excellent as ◯. As for transparency, the haze value was 15 to 25, which ensured transparency.

なお、表１において、透明度（ヘイズ値）の測定は「あくまでもフィルムでの測定」で実施例１、比較例１の透明度は透明層のみフィルム状態で作成して測定したもの。比較例２、比較例３は発泡加工後に気泡が発生して白濁するため、透明層単体として加工が出来ない（再現できない）ために「測定不能」とした。

In Table 1, the transparency (haze value) was measured in "Measurement with a film", and the transparency of Example 1 and Comparative Example 1 was measured by preparing only the transparent layer in a film state. In Comparative Example 2 and Comparative Example 3, air bubbles were generated after the foaming process and the transparent layer became cloudy, so that the transparent layer could not be processed as a single substance (cannot be reproduced).

(Comparative Example 1)
The transparent first vinyl chloride resin sheet layer 11 constituting the cushion floor material 10A is replaced with a calendar sheet, and the thickness is 0.5 mm with a paste containing a vinyl chloride resin having a degree of polymerization of 3000 (abbreviated as paste in the table). The cushion floor material 10A was obtained under the same conditions as in Example 1 except that the transparent adhesive layer 12 was not used.
In the cushion flooring material 10A of Comparative Example 1, as is clear from Table 1, both the adhesive strength and the appearance were ◯, but the transparent appearance was semi-white turbid and Δ, and the transparency was The haze value was 45 to 60, which was low in transparency.

(Comparative Example 2)
A cushion flooring material 10A was obtained under the same conditions as in Example 1 except that the transparent adhesive layer 12 constituting the cushion flooring material 10A was not used.
In the cushion flooring material 10A of Comparative Example 2, as is clear from Table 1, the adhesive strength was x, interfacial peeling occurred, and the appearance was Δ, and there were partial bubbles. The appearance of transparency was x, and there was no transparency due to air bubbles, and the transparency was unmeasurable.

(Comparative Example 3)
A cushion floor material 10A was obtained under the same conditions as in Example 1 except that an acrylic transparent adhesive was used instead of the vinyl chloride resin paste of the transparent adhesive layer 12 constituting the cushion floor material 10A.
In the cushion flooring material 10A of Comparative Example 3, as is clear from Table 1, the adhesive strength was x for interfacial peeling, and the appearance was Δ with air bubbles. The appearance of transparency was x, and there was no transparency due to air bubbles, and the transparency was unmeasurable.

As described above, together with the embodiments and examples, as specifically described , according to the floor material 10, the transparent first vinyl chloride resin sheet layer 11, the transparent adhesive layer 12, and the pattern design are printed. A flooring material 10 in which a printed layer 13, a second vinyl chloride resin layer 14, and a base material layer 15 are laminated in this order, and the transparent adhesive layer 12 is formed of a vinyl chloride resin paste and has a second. The vinyl chloride resin layer 14 is composed of the foam layer 14A, and the degree of polymerization of the vinyl chloride resin forming the transparent adhesive layer 12 is higher than the degree of polymerization of the vinyl chloride resin of the second vinyl chloride resin layer 14. The thickness of the transparent first vinyl chloride resin sheet layer 11 can be adjusted to ensure the required wear resistance, and the transparent first vinyl chloride resin sheet layer 11 and the transparent adhesive layer 12 can be used together. The floor material 10 can ensure transparency and has excellent adhesiveness.

According to the floor material 10, by forming the second vinyl chloride resin layer 14 as the foam layer 14A, the cushion floor material 10A can be obtained, and the thickness of the transparent first vinyl chloride resin sheet layer 11 can be increased. It is possible to adjust and secure the required wear resistance, and the transparent first vinyl chloride resin sheet layer 11 and the transparent adhesive layer 12 can be used as a cushion flooring material 10A that ensures transparency. ..

According to the floor material 10, the degree of polymerization of the vinyl chloride resin forming the transparent adhesive layer 12 is higher than the degree of polymerization of the vinyl chloride resin of the second vinyl chloride resin layer 14, so that the cushion floor material 10A is used as the second. Even when the vinyl chloride resin layer 14 of the above is used as the foam layer 14A, the influence of the foam gas can be suppressed by the transparent adhesive layer 12, and the restriction on the degree of polymerization of the first vinyl chloride resin sheet layer 11 can be eliminated. Moreover, the thickness of the first vinyl chloride resin sheet layer 11 can be set to have the required wear resistance. Further, by preventing the foaming gas from being mixed with the foaming, the sheet layer 11 of the first vinyl chloride resin having a low degree of polymerization can be obtained, and good mechanical embossing becomes possible, and the first vinyl chloride chloride can be obtained. The transparency of the resin sheet layer 11 and the transparent adhesive layer 12 can be ensured.

According to manufacturing method of flooring 10 of the present invention, a method for producing a flooring material is coated with a vinyl chloride resin paste on the surface of the base layer 15, a second vinyl chloride resin layer was gelled 14 The first step 21 and the second step 22 of printing on the surface of the second vinyl chloride resin layer 14 gelled in the first step 21 to form the print layer 13 and the surface of the print layer 13. A vinyl chloride resin paste to be a transparent adhesive layer 12 is applied to the surface, a transparent vinyl chloride sheet (sheet layer 11) to be a surface layer is laminated on the vinyl chloride resin paste, and heat-pressed to gel the vinyl chloride resin paste. At the same time, a third step 23 of fixing to the transparent vinyl chloride sheet (sheet layer 11) and a fourth step 24 of heat-treating the floor materials 10 and 10A after the third step 23 are provided. Therefore, the thickness of the transparent first vinyl chloride resin sheet layer 11 can be adjusted to ensure the required wear resistance, and the transparent first vinyl chloride resin sheet layer 11 and the transparent adhesive layer 12 can be secured. As a result, the floor material 10 can be made transparent and has excellent adhesiveness.

According to manufacturing method of flooring 10 of the present invention, the second polyvinyl chloride resin layer 14 is gelled in the first step 21 is constructed by applying laden vinyl chloride resin paste a foaming agent, In the fourth step, the foaming agent contained in the gelled vinyl chloride resin layer is thermally decomposed to form the vinyl chloride foam layer 14A. Therefore, the second vinyl chloride resin layer 14 is used as the foam layer 14A for the cushion floor. The material 10A can be produced, and the thickness of the transparent first vinyl chloride resin sheet layer 11 can be adjusted to ensure the required wear resistance of the transparent first vinyl chloride resin. The sheet layer 11 and the transparent adhesive layer 12 can ensure transparency.

As described above, according to the flooring materials 10 and 10A and the method for producing the flooring material of the present invention, the first vinyl chloride resin sheet layer 11 which is transparent and can be mechanically embossed can be subjected to good mechanical embossing as before. As a calendar sheet, there is no restriction on the degree of polymerization of the vinyl chloride resin, the required thickness can be obtained, and wear resistance and transparency can be ensured.

The present invention is not limited to the above embodiments and examples.

10 Flooring material 10A Cushion flooring material 11 Sheet layer 12 Transparent adhesive layer 13 Printing layer 14 Vinyl chloride resin layer 14A Foaming layer 15 Base material layer 21 First step 22 Second step 23 Third step 24 Fourth step

Claims (1)

A transparent first vinyl chloride resin sheet layer and
With a transparent adhesive layer,
The print layer on which the design is printed and
The second vinyl chloride resin layer and the base material layer are laminated in this order ,
The transparent adhesive layer is formed of a vinyl chloride resin paste and is formed from a vinyl chloride resin paste.
The second vinyl chloride resin layer is a method for producing a flooring material composed of a foam layer.
The first step of applying the vinyl chloride resin paste to the surface of the base material layer and gelling it into a second vinyl chloride resin layer, and
A second step of printing on the surface of the second vinyl chloride resin layer gelled in the first step to form a print layer, and
A vinyl chloride resin paste to be a transparent adhesive layer is applied to the surface of the printing layer, a transparent vinyl chloride sheet to be a surface layer is laminated on the surface, and the vinyl chloride resin paste is gelled by heat-pressing. At the same time, the third step of fixing to the transparent vinyl chloride resin sheet and
Following the third step, a fourth step of heat-treating the flooring material is provided.
The second vinyl chloride resin layer is formed by applying a vinyl chloride resin paste containing a foaming agent, and is gelled in the first step.
In the fourth step, the foaming agent contained in the gelled vinyl chloride resin layer is thermally decomposed to form a vinyl chloride foam layer, and the degree of polymerization of the vinyl chloride resin forming the transparent adhesive layer is determined. second magnitude than the polymerization degree of the vinyl chloride resin of the vinyl chloride resin layer Kushida,
A method for manufacturing a flooring material, which is characterized in that.

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