KR102233544B1 - Flooring material improved surface physical properties - Google Patents

Abstract

The present invention relates to a tile flooring material with improved surface pressurization, and more particularly, a polyvinyl chloride (PVC) foam board sequentially from the bottom; It is a tile flooring material including polyvinyl chloride (PVC) luxury vinyl tiles (LVT), and it relates to a flooring material in which the hardness of the high-quality vinyl tile is increased to improve surface pressability by heavy objects.

Description

Tile flooring with improved surface pressurization and manufacturing method thereof {Flooring material improved surface physical properties}

The present invention relates to a tile flooring material with improved surface pressurization, and more particularly, a polyvinyl chloride (PVC) foam board sequentially from the bottom; The present invention relates to a tile flooring material including luxury vinyl tiles (LVT), in which the hardness of the luxury vinyl tile is increased to improve the surface pressability by heavy objects.

As an example of flooring, reinforced flooring is a laminated surface layer containing paper or fibrous substrate impregnated with a thermosetting resin such as melamine resin or phenolic resin on the top surface of a wooden substrate such as MDF (Medium Density Fiberboard) or HDF (High Density Fiberboard). , Polyvinyl chloride high-grade vinyl tile (LVT) flooring has been developed because of the problem of discoloration or deformation by absorbing moisture due to the resin contained in the surface layer.

However, the tile flooring material has a disadvantage in that it does not prevent irregularities of the floor due to the limitation of flexibility, as disclosed in Korean Laid-Open Patent Publication No. 10-2016-0138157 (published on December 02, 2016). A composite flooring material having a structure in which the high-quality vinyl tiles are bonded on top of a polyvinyl chloride foam board (Wood plastic composite, WPC) has been developed.

The composite flooring was light like a reinforced floor and prevented unevenness of the floor due to the fact that the foam board was included in the lower part, but the foam board when moving to another place after placing a weight of about 67kg/cm2 or more, such as furniture or refrigerator, was placed on the upper part of the flooring. There was a problem that could not be restored by pressing.

KR 10-2016-0138157 A (Published: 2016.12.02)

The present invention has been conceived to solve the above-described problems, and an object thereof is to provide a tile flooring material having improved surface pressability by heavy objects.

To achieve the above object,

The present invention foam board 10; As a tile flooring material (1) comprising; high-quality vinyl tiles (20) laminated on the foam board,

The high-grade vinyl tile 20 includes a base layer 21 sequentially from the bottom; Printing layer 22; And a transparent layer 23; Including,

The base layer 21 provides a tile flooring 1 comprising 2 to 25 parts by weight of an acrylic resin, 2 to 15 parts by weight of a plasticizer, and 100 to 500 parts by weight of a filler based on 100 parts by weight of a polyvinyl chloride resin.

The tile flooring material of the present invention has an effect of improving the surface pressing property.

The tile flooring material of the present invention is light and has the effect of preventing irregularities in the floor.

1 is a side cross-sectional view showing an embodiment of a laminated structure of a tile flooring according to the present invention.
Figure 2 is a side cross-sectional view showing another embodiment of the laminated structure of the tile flooring according to the present invention.

Referring to Figure 1, the present invention

Foam board 10; As a tile flooring material (1) comprising; high-quality vinyl tiles (20) laminated on the foam board,

The high-grade vinyl tile 20 includes a base layer 21 sequentially from the bottom; Printing layer 22; And a transparent layer 23; Including,

The base layer 21 relates to a tile flooring 1 comprising 2 to 25 parts by weight of an acrylic resin, 2 to 15 parts by weight of a plasticizer, and 100 to 500 parts by weight of a filler based on 100 parts by weight of a polyvinyl chloride resin.

Hereinafter, each layer will be described.

Base layer (21)

In the present invention, the base layer 21 is an acrylic resin based on 100 parts by weight of polyvinyl chloride resin so as to increase the hardness of the high-quality vinyl tile 20 and thus have excellent pressability on the surface of the flooring material, and not to deteriorate physical properties as a flooring material. It may include parts by weight, 2-15 parts by weight of a plasticizer, and 100-500 parts by weight of a filler.

The polyvinyl chloride resin is not plasticized and is not particularly limited as long as it has a glass transition temperature of about 80°C, but a general-purpose polyvinyl chloride resin that can be applied to both soft and hard products as a homopolymer of vinyl chloride resin can be used. have.

The polyvinyl chloride resin may have a degree of polymerization of 900-1800, or 900-1500. If it is less than the above range, durability and mechanical properties are deteriorated, and if it exceeds the above range, workability is lowered, so that the degree of polymerization may be within the above range.

The acrylic resin serves as a plasticizer and/or a processing aid, and may be polymethyl methacrylate having a relatively high glass transition temperature and rigidity.

The polymethyl methacrylate may be a homopolymer of methyl methacrylate and a polymer of methyl methacrylate and other acrylic monomers.

The acrylic monomer may be an alkyl acrylate monomer, an alkyl methacrylate monomer, or a mixture of an alkyl acrylate monomer and an alkyl methacrylate monomer.

The alkyl acrylate monomers include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, methyl Butyl acrylate, amyl acrylate, isoamyl acrylate, n-hexyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, pentadecyl acrylate, dodecyl acrylate, isobornyl acrylate, phenylacrylic It may be one or more selected from the group consisting of acrylate, benzyl acrylate, phenoxyethyl acrylate, 2-hydroxyethyl acrylate, 2-methoxyethyl acrylate, glycidyl acrylate and allyl acrylate.

The alkyl methacrylate monomers include ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate excluding methyl methacrylate. Rate, tert-butyl methacrylate, amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, pentadecyl methacrylate, dodecyl Methacrylate, isobornyl methacrylate, phenyl methacrylate, benzyl methacrylate, phenoxyethyl methacrylate, 2-hydroxyethyl methacrylate, 2-methoxyethyl methacrylate, glycidyl methacrylate It may be one or more selected from the group consisting of acrylate and allyl methacrylate.

The polymethyl methacrylate may further include other monomers in addition to the methyl methacrylate and acrylic monomers.

Other monomers include unsaturated carboxylic acids such as methacrylic acid, acrylic acid, and maleic anhydride; Olefins such as ethylene, propylene, 1-butene, isobutylene, and 1-octene; Conjugated diene compounds such as 1,3-butadiene, isoprene, and myrcene; Aromatic vinyl compounds such as styrene, α-methylstyrene, p-methylstyrene, and m-methylstyrene; Vinyl acetate; Vinylpyridine; Unsaturated nitriles such as acrylonitrile and methacrylonitrile; Vinyl ketone; Halogen-containing monomers such as vinyl chloride, vinylidene chloride, and vinylidene fluoride; And unsaturated amides such as acrylamide and methacrylamide.

An example of the polymethyl methacrylate may be a copolymer of methyl methacrylate and methacrylic acid or a copolymer of methyl methacrylate and methyl acrylate and methacrylic acid. It may be a copolymer of methacrylate and methyl acrylate and methacrylic acid.

The acrylic resin may have a glass transition temperature of 85-120°C or 90-115°C. If it is less than the above range, the effect of increasing the glass transition temperature of the base layer 21 is insignificant and thus the effect of increasing the hardness of the high-quality vinyl tile 20 cannot be expected. It is possible to use an acrylic resin having.

The acrylic resin may have a weight average molecular weight (Mw) of 10,000-300,000g/mole, or 20,000-150,000g/mole. If it is less than the above range, polymerization is difficult and the effect of improving the surface pressing properties is insignificant, and if it exceeds the above range, compatibility and processability with the polyvinyl chloride resin are poor, so excellent processability is implemented to facilitate the shape of the desired flooring material. It may have a weight average molecular weight within the above range that can be implemented.

In addition, the acrylic resin may have a melt index (MI) of 65-90g/10min (230°C, 3.8kg), or 75-85g/10min (230°C, 3.8kg). If it is outside the above range, the flowability is too low or high, so processability is not good, and thus an acrylic resin that satisfies the melt index within the above range may be used.

In addition, the Brookfield viscosity of the acrylic resin may be 450-600cps or 500-550cps at 23°C. If it is outside the above range, the flowability is too low or high, so processability is not good, and thus an acrylic resin having a Brookfield viscosity within the above range may be used.

The acrylic resin may be 2-25 parts by weight or 3-20 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. If it is less than the above range, processability is deteriorated, and if it exceeds the above range, economical efficiency is reduced due to excessive use of an acrylic resin that is about 2.5 times more expensive than the polyvinyl chloride resin, so it is preferable to use it within the above range.

In addition, the base layer 21 may include a plasticizer.

In this case, since the base layer of the present invention contains polymethyl methacrylate, it is possible to minimize the plasticizer content compared to the conventional polyvinyl chloride alone resin composition.

The plasticizer may be at least one selected from a phthalate-based plasticizer, a terephthalate-based plasticizer, a benzoate-based plasticizer, a citrate-based plasticizer, a phosphate-based plasticizer, or an adipate-based plasticizer.

Dioctylphthalate may be used as the phthalate plasticizer, but is not limited thereto.

Dioctyl terephthalate may be used as the terephthalate plasticizer, but is not limited thereto.

The benzoate plasticizers include 2-(2-(2-phenylcarbonyloxyethoxy)ethoxy)ethyl benzoate, glyceryl tribenzoate, trimethylolpropane tribenzoate, isononyl benzoate, 1-methyl -2-(2-phenylcarbonyloxypropoxy)ethyl benzoate, 2, 2, 4-trimethyl-1, 3-pentanediol dibenzoate, n-hexyl benzoate or trimethylol propanetribenzoate can be used. However, it is not limited thereto.

As the citrate plasticizer, acetyl tributyl citrate, acetyl triisobutyl citrate, acetyl triethylhexyl citrate, or tributyl citrate may be used, but is not limited thereto.

Tricresyl phosphate or tributyl phosphate may be used as the phosphate-based plasticizer, but is not limited thereto.

Bis(2-ethylhexyl) adipate, dimethyl adipate, monomethyl adipate, or dioctyl adipate diisononyl adipate may be used as the adipate plasticizer, but is not limited thereto.

The plasticizer may be used in 2-15 parts by weight or 4-10 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. If it is less than the above range, workability and physical properties are deteriorated, and if it exceeds the above range, it is not possible to expect an effect of increasing the hardness of the high-quality vinyl tile, so that the improvement of the surface pressing property is insignificant, and thus it can be used within the above content range.

The filler is one or more selected from the group consisting of calcium carbonate, wood flour, mica, amorphous silica, talc, zeolite, magnesium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, aluminum oxide, kaolin, ATH (Alumina trihydrate), and talc. It may be, and preferably, inexpensive calcium carbonate may be used.

The filler may be used in an amount of 100 to 500 parts by weight, or 100 to 400 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. If it is less than the above range, there is a concern about price increase, and if it exceeds the above range, workability is deteriorated.

In addition, the base layer 21 may further include a heat stabilizer.

The heat stabilizer is necessary for the processing of a general polyvinyl chloride resin, and the type thereof is not limited, but, for example, epoxidized soybean oil, metal salt, calcium-zinc, barium-zinc, or a mixture thereof may be used. The heat stabilizer may be used in an amount of 1 to 6 parts by weight based on 100 parts by weight of the polyvinyl chloride resin.

The glass transition temperature of the base layer 21 is 50-90° C. or 60-85° C., and the glass transition temperature is higher than that of the base layer including the polyvinyl chloride resin alone. It works.

The shore D hardness of the base layer 21 may be 62-92 or 62-90. If it is less than the above range, the effect of improving the surface pressing property of the tile flooring 1 is insignificant, and when it exceeds the above range, the effect of improving the surface pressing property is large, but the workability is lowered, so that the tile flooring material 1 may have a hardness within the above range.

The base layer 21 may have a thickness of 0.5-5mm or 1-3mm. If it is less than the above range, the effect of improving the surface pressing property of the tile flooring 1 is insignificant, and if it exceeds the above range, the manufacturing cost increases as it is formed thicker than necessary, and thus it is not appropriate, so it can be used within the above range.

Print layer(22)

On the other hand, the printing layer 22 laminated on the base layer 21 is intended to impart various appearance and design effects to the flooring material, and 10-30 parts by weight of a plasticizer and 1-a heat stabilizer based on 100 parts by weight of the polyvinyl chloride resin. It may contain 5 parts by weight and a pigment.

Since the polyvinyl chloride resin, plasticizer, and heat stabilizer are the same as the polyvinyl chloride resin, plasticizer, and heat stabilizer included in the base layer 21 described above, overlapping descriptions will be omitted.

The printing layer 22 may be formed on the surface of the white sheet laminated (laminated) on the base layer 21 through transfer printing.

In the present invention, an example in which the printing layer 22 is formed through transfer printing on the surface of a white sheet has been described, but the present invention is not limited thereto, and is formed through gravure or screen printing directly on the base layer 21. Can be.

The print layer 22 may have a thickness of 0.01-1mm or 0.05-0.5mm, but is not limited thereto.

Transparent layer (23)

In addition, the transparent layer 23 laminated on the printed layer 22 protects the printed pattern or pattern on the lower side and further increases the hardness of the high-quality vinyl tile 1 to improve the surface pressability. It may contain 5-40 parts by weight or 10-30 parts by weight of a plasticizer based on 100 parts by weight of the vinyl resin. Since the polyvinyl chloride resin and the plasticizer are the same as the polyvinyl chloride resin and the plasticizer included in the base layer 21 described above, overlapping descriptions will be omitted.

When the content of the plasticizer contained in the transparent layer 23 is less than the above range, workability and physical properties are deteriorated, and when the content of the plasticizer exceeds the above range, an effect of increasing the hardness of the high-quality vinyl tile cannot be expected, and thus can be used within the above content range.

The transparent layer 23 may further include a heat stabilizer. Since the thermal stabilizer is the same as the thermal stabilizer included in the base layer 21 described above, duplicate descriptions will be omitted.

The transparent layer 23 may be a film having a thickness of 150-500 μm, or 200-400 μm. If it is formed below the above range, it is difficult to protect the print layer 22 located underneath it because it may be damaged as it is formed too thin, and if it is formed beyond the above range, it is too thick, which may take a lot of material cost. It is desirable to have a thickness within the range.

The glass transition temperature of the transparent layer 23 may be 20-70°C, or 20-60°C. The glass transition temperature is a range that can be obtained by changing the content of the plasticizer in the transparent layer 23, and by having a glass transition temperature within the above range, the hardness of the high-quality vinyl tile 20 further increases, thereby improving the surface pressability. have.

Surface treatment layer (24)

In addition, the tile flooring 1 of the present invention is selectively laminated on the transparent layer 23 to improve scratch resistance and abrasion resistance of the surface of the flooring material, and further includes a surface treatment layer 24 that prevents contaminants from adhering. It can be included (see Fig. 2).

The surface treatment layer 24 may be formed by coating a conventional photocurable resin.

The thickness of the surface treatment layer 24 may be 0.005-0.1mm or 0.01-0.05mm. If it is less than the above thickness, it is difficult to expect an effect of improving physical properties such as scratch resistance, and if it exceeds the above range, it is formed too thick, so that it takes a lot of material cost or may deteriorate the appearance quality of the flooring material, so it may have a thickness within the above range. .

Foam Board(10)

Meanwhile, the tile flooring 1 of the present invention may further include a foam board 10 under the high-quality vinyl tile 20.

The foam board 10 imparts light weight to the flooring material and prevents discoloration and unevenness of the flooring material due to moisture, and 1-10 parts by weight of a foaming agent and 50-300 parts by weight of a filler per 100 parts by weight of polyvinyl chloride resin And 0.1-5 parts by weight of a heat stabilizer.

The polyvinyl chloride resin, the filler, and the heat stabilizer are the same as the polyvinyl chloride resin and the filler included in the base layer 21 described above, so a duplicate description will be omitted.

When the content of the foaming agent included in the foam board 10 is less than the above range, the weight of the floor material becomes heavy, and if it exceeds the above range, the foam cells are excessively generated and the surface properties and durability are deteriorated, so it can be used within the above content range. .

In addition, the foaming rate of the foam board 10 may be 100-350% or 100-200%. If it is less than the above range, the light weight of the flooring material is deteriorated, and if it exceeds the above range, durability and strength are weakened and physical properties are reduced, so that it may have a foaming rate within the above range.

In addition, it may be 1-10mm or 2-7mm of the foam board 10. If it is less than the above range, the hardness of the foam board is insufficient to prevent unevenness of the flooring material, and if it exceeds the above range, it is formed too thick, which requires a large amount of material, and thus may have a thickness within the above range.

Each layer of the tile flooring 1 of the present invention may further include other additives for selectively adjusting physical properties. The other additives are one or more selected from antistatic agents, ultraviolet absorbers, flame retardants, natural waxes, antioxidants, lubricants, coloring agents, stabilizers, wetting agents, thickeners, foaming agents, antifoaming agents, coagulants, gelling agents, anti-settling agents, anti-aging agents, etc. Can be used, and their content is not particularly limited.

Except for the surface treatment layer 24 of the tile flooring 1 of the present invention, the base layer 21, the printing layer 22, and the transparent layer 23 are, for example, extrusion molding, calendering molding, or blow molding. Thus, each of the layers can be prepared in a film or sheet shape,

These may be laminated by applying heat and pressure using a plywood process known in the art to form the high-quality vinyl tile 20, but is not limited thereto.

The foam board 10 may be manufactured through extrusion molding or calendering molding, for example.

Thereafter, the high-quality vinyl tile 20 and the foam board 10 may be laminated using a known hot melt adhesive or primer.

The tile flooring material of the present invention has an effect of improving the surface pressing property.

The surface pressing property is measured by measuring the pressed depth after 24 hours after pressing the tile flooring material 1 at a pressure of 1000 psi for 24 hours and removing the pressure, and may be 0.7 mm or less or 0.5 mm or less.

If it exceeds the above range, it can be seen that the effect of improving the surface pressing property is insignificant, which is not preferable.

In addition, the shore D hardness of the tile flooring material of the present invention may be 62-92 or 62-90.

In addition, the tile flooring material of the present invention is light and has an effect of preventing irregularities in the floor.

[Example]

1. Tile flooring manufacturing

<Example 1>

(Base layer formation)

15 parts by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole with an acrylic resin based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 7 parts by weight of calcium carbonate as a filler and 270 parts by weight of calcium carbonate are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

(Printed layer formation)

A composition for producing a white sheet was prepared by mixing 20 parts by weight of a plasticizer, 2 parts by weight of a heat stabilizer, and _{10 parts by weight of a pigment (TiO 2) with a Banbari mixer based on 100 parts by weight of the polyvinyl chloride resin.}

Subsequently, the composition for preparing a white sheet is calendered at a temperature of 160° C. to form a white sheet having a thickness of 0.1 mm.

Subsequently, a print layer is formed by forming a print pattern on the surface of the white sheet through gravure printing or transfer printing.

(Transparent layer formation)

A composition for producing a transparent layer is prepared by kneading 30 parts by weight of a plasticizer with a Banbari mixer based on 100 parts by weight of the polyvinyl chloride resin.

Subsequently, the composition for preparing the transparent layer is calendered at a temperature of 160° C. to form a transparent film having a thickness of 300 μm.

(Foaming board)

A foam board having a thickness of 4.2 mm with a foaming ratio of 200% by extrusion molding a foam board composition comprising 5 parts by weight of a foaming agent, 100 parts by weight of a filler, 3 parts by weight of a heat stabilizer, and 1 part by weight of a lubricant based on 100 parts by weight of polyvinyl chloride resin To form.

A printed layer was laminated on the base layer prepared above, a transparent layer was laminated on the printed layer, and then thermally laminated at a temperature of 160° C. to prepare a high-quality vinyl tile in which the base layer, the printed layer, and the transparent layer were laminated.

Thereafter, a foam board was attached to the lower part of the high-quality vinyl tile using a hot melt adhesive to prepare a tile flooring material of the present invention.

<Example 2>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

5 parts by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 5 parts by weight of a filler and 150 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Example 3>

A tile flooring was manufactured by forming the base layer in the same composition and method as in Example 2, except that the base layer was prepared in the same composition as in Example 2, and the transparent layer was prepared in the following composition and method.

(Transparent layer formation)

With respect to 100 parts by weight of the polyvinyl chloride resin, 10 parts by weight of dioctyl terephthalate (LG Chemical, DOTP) as a plasticizer is kneaded with a Banbari mixer to prepare a composition for preparing a transparent layer.

Subsequently, the composition for preparing the transparent layer is calendered at a temperature of 160° C. to form a transparent film having a thickness of 300 μm.

<Comparative Example 1>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

With respect to 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), 30 parts by weight of dioctyl terephthalate (LG Chemical, DOTP) as a plasticizer and 270 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Comparative Example 2>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

1 part by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 7 parts by weight of a filler and 270 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Comparative Example 3>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

40 parts by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole with an acrylic resin based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 7 parts by weight of a filler and 270 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Comparative Example 4>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

15 parts by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole with an acrylic resin based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 1 part by weight of a filler and 270 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Comparative Example 5>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

15 parts by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole with an acrylic resin based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 30 parts by weight of a filler and 270 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Comparative Example 6>

A tile flooring was manufactured by forming the base layer by the same composition and method as in Example 1, except that the base layer was prepared by the following composition and method.

(Base layer formation)

40 parts by weight of polymethyl methacrylate with a glass transition temperature of 105°C and a weight average molecular weight of 43,000 g/mole with an acrylic resin based on 100 parts by weight of polyvinyl chloride resin (LG Chemical, LS 100), dioctyl terephthalate as a plasticizer (LG Chemical, DOTP) 30 parts by weight of a filler and 270 parts by weight of a filler are kneaded with a Banbari mixer to prepare a composition for preparing a base layer.

Subsequently, the composition for preparing the base layer is calendered at a temperature of 160° C. to form a base layer having a thickness of 1.3 mm.

<Comparative Example 7>

A tile flooring was manufactured by forming the transparent layer in the same composition and method as in Comparative Example 1, except that the transparent layer was prepared by the following composition and method.

(Transparent layer formation)

With respect to 100 parts by weight of the polyvinyl chloride resin, 10 parts by weight of dioctyl terephthalate (LG Chemical, DOTP) as a plasticizer is kneaded with a Banbari mixer to prepare a composition for preparing a transparent layer.

Subsequently, the composition for preparing the transparent layer is calendered at a temperature of 160° C. to form a transparent film having a thickness of 300 μm.

<Reference Example 1>

As an acrylic resin used for the base layer, it was composed of the same monomer and the same monomer ratio as in Example 1, except that the base layer was formed using polymethyl methacrylate having a molecular weight of 400,000 g/mole. It was formed by the same composition and method to prepare a tile flooring.

<Reference Example 2>

As an acrylic resin used for the base layer, it was composed of the same monomer and the same monomer ratio as in Example 1, except that the base layer was formed using polymethyl methacrylate having a molecular weight of 5,000 g/mole. It was formed by the same composition and method to prepare a tile flooring.

2. Measurement of physical properties of tile flooring

The glass transition temperature (Tg) of the transparent layer and the base layer of Example 1-3, Comparative Example 1-7 and Reference Example 1-2 prepared in the above 1, and the surface pressability, workability, and hardness of the tile flooring were measured, and the following It is shown in Table 1.

-The glass transition temperature was measured by DSC (differential scanning calorimetry).

-The surface pressing property was pressed against the tile flooring material at a pressure of 1000 psi for 24 hours, the pressure was removed, and the pressed depth after 24 hours was measured.

-The workability was visually confirmed after forming the base layer in two rolls.

(Good: The surface of the molded base layer is smooth

Poor: The surface of the molded base layer is not smooth and is dull)

-The hardness was measured with a Shore D hardness tester.

As confirmed in Table 1, Example 1-3, which is a tile flooring material according to the present invention, contains an acrylic resin having rigidity in the base layer and increases the hardness of the high-quality vinyl tile by reducing the content of the plasticizer to increase the surface pressability. It can be seen that it is significantly improved compared to Comparative Example 1-7.

In particular, it can be seen that the transparent layer of the tile flooring material of Example 3 contained a small amount of plasticizers and increased the glass transition temperature than Examples 1 and 2, thereby remarkably improving the surface pressing property.

On the other hand, Comparative Example 1 in which the base layer does not contain an acrylic resin does not improve the surface pressability, and Comparative Example 2 in which the base layer contains an acrylic resin in a specific content range lowers processability, and the base layer contains an acrylic resin. It can be seen that Comparative Example 3, which was included in excess of the specific content range, was undesirable due to an increase in material value.

In addition, the base layer of the tile flooring material of Comparative Example 4 contained a plasticizer in a specific content range to lower the workability, and the tile flooring material of Comparative Example 5 and the plasticizer of the base layer including the plasticizer of the base layer in excess of the specific content range. It can be seen that the tile flooring material of Comparative Example 6, including both acrylic resins exceeding the specific content range, has good processability, but does not improve the surface pressing properties.

In addition, the transparent layer of the tile flooring material of Comparative Example 7 contained a small amount of plasticizer than that of Comparative Example 1, but since the base layer did not contain an acrylic resin, the effect of increasing the hardness of the high-quality vinyl tile was insignificant. In comparison, it can be seen that the improvement of the surface pressing property is lowered.

In addition, in Reference Example 1, the weight average molecular weight of the acrylic resin contained in the base layer exceeded 300,000 g/mole, so that compatibility with the polyvinyl chloride resin was lowered, resulting in lower processability, and the molecular weight of the acrylic resin contained in the base layer was reduced. Reference Example 2, which is less than 10,000 g/mole, can be seen that the improvement in surface pressability is lowered compared to Example 1-3 according to the present invention.

1: tile flooring 10: foam board
20: high-grade vinyl tile 21: base layer
22: printing layer 23: transparent layer
24: surface treatment layer

Claims (16)

Foam board 10; As a tile flooring material (1) comprising; high-quality vinyl tiles (20) laminated on the foam board,
The high-grade vinyl tile 20 includes a base layer 21 sequentially from the bottom; Printing layer 22; And a transparent layer 23; Including,
The foam board 10 includes 100 parts by weight of a polyvinyl chloride resin; 50-300 parts by weight of a filler and 0.1-5 parts by weight of a heat stabilizer are foam-molded,
The base layer 21 includes 2-25 parts by weight of an acrylic resin, 2-15 parts by weight of a plasticizer, and 100-500 parts by weight of a filler, based on 100 parts by weight of the polyvinyl chloride resin,
After pressing the tile flooring at a pressure of 1000 psi for 24 hours, the pressure is removed, and the surface pressing property measured by the pressed depth after 24 hours is 0.7 mm or less. The method of claim 1,
The polyvinyl chloride resin has a degree of polymerization of 900-1800. The method of claim 1,
The acrylic resin is a tile flooring material that is polymethyl methacrylate. The method of claim 3,
The polymethyl methacrylate is a homopolymer of methyl methacrylate and a copolymer of methyl methacrylate and other acrylic monomers. The method of claim 4,
The acrylic monomer is an alkyl acrylate monomer or an alkyl methacrylate monomer or a mixture of an alkyl acrylate monomer and an alkyl methacrylate monomer. The method of claim 3,
The polymethyl methacrylate is one selected from a copolymer of methyl methacrylate and methacrylic acid or a copolymer of methyl methacrylate and methyl acrylate and methacrylic acid. The method of claim 1,
The acrylic resin is a tile flooring material having a glass transition temperature of 85-120°C. The method of claim 1,
The acrylic resin is a tile flooring material having a weight average molecular weight (Mw) of 10,000-300,000g/mole. The method of claim 1,
The acrylic resin is a tile flooring material having a melt index (MI) of 65-90g/10min (230°C, 3.8kg). The method of claim 1,
The Brookfield viscosity of the acrylic resin is 450-600cps at 23 ℃ tile flooring. The method of claim 1,
The glass transition temperature of the base layer 21 is 50-90 ℃ tile flooring. delete The method of claim 1,
The glass transition temperature of the transparent layer 23 is a tile flooring material that is 20-70 ℃. The method of claim 1,
The glass transition temperature of the transparent layer 23 is 20-60 ℃ tile flooring. The method of claim 1,
The foam board is a tile flooring material having a thickness of 2 to 7 mm and a foaming rate of 100-350%. The method of claim 1,
The tile flooring material has a Shore D hardness of 62-92.

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