KR20190068901A - Flooring material improved surface physical properties - Google Patents

Abstract

The present invention relates to a tile flooring material having improved surface compression. More particularly, the present invention relates to a tile flooring material comprising a polyvinyl chloride (PVC) foaming board, a polyvinyl chloride luxury vinyl tile (LVT) sequentially from the bottom, wherein the hardness of the luxury vinyl tile is increased to improved surface compression by a weight.

Description

[0001] Flooring material improved surface physical properties [0002]

The present invention relates to a tile flooring improved in surface puckering, and more particularly, to a tile flooring improved in surface compression, and more particularly, from the bottom up, polyvinyl chloride (PVC) foam board; The present invention relates to a flooring material which improves the hardness of the above-mentioned high-grade vinyl tiles by using a high-quality vinyl tile (Luxury Vinyl Tiles (LVT)).

As an example of the flooring material, a reinforcing floor is a laminate of a surface layer containing a paper or fibrous substrate impregnated with a thermosetting resin such as melamine resin or phenol resin on the surface of a wood base material such as MDF (Medium Density Fibreboard) or HDF , And polyvinyl chloride (PVC) high-vinyl tile (LVT) flooring has been developed because of the problem of absorbing moisture and discoloring or deforming due to the resin contained in the surface layer.

However, the tile flooring has a disadvantage in that the tile flooring can not prevent the unevenness of the floor due to the limitation of flexibility. To solve this problem, Korean Patent Laid-Open Publication No. 10-2016-0138157 (published on December 02, 2016) A composite flooring having a structure in which the above-mentioned high-grade vinyl tile is bonded on a plastic plastic composite board (WPC) was developed.

Since the composite flooring material includes a foam board at the bottom, it is possible to prevent the unevenness of the floor from being lighter like a reinforced floor. However, when a heavy material having a weight of 67 kg / cm 2 or more, such as furniture or a refrigerator, is placed on the flooring, A problem has occurred that can not be restored.

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

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above problems, and it is an object of the present invention to provide a tile floor material improved in surface puckering by heavy materials.

In order to achieve the above object,

The present invention relates to a foam board (10); And a high-grade vinyl tile (20) laminated on the foam board,

The high-grade vinyl tile (20) comprises a base layer (21); A printing layer 22; And a transparent layer (23); ≪ / RTI >

The base layer 21 provides 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 of the present invention has an effect of improving the surface pressing property.

The tile flooring of the present invention is lightweight and has the effect of preventing unevenness of the floor.

1 is a side sectional view showing an embodiment of a laminated structure of a tile flooring according to the present invention.
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,

A foam board 10; And a high-grade vinyl tile (20) laminated on the foam board,

The high-grade vinyl tile (20) comprises a base layer (21); A printing layer 22; And a transparent layer (23); ≪ / RTI >

The base layer 21 is composed of 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 a polyvinyl chloride resin.

Hereinafter, each layer will be described as follows.

The base layer (21)

In the present invention, the base layer 21 is made of acrylic resin 2-25 (based on 100 parts by weight of polyvinyl chloride resin) so that the hardness of the high-grade vinyl tile 20 is increased and the surface property of the bottom layer is excellent, 2-15 parts by weight of a plasticizer, and 100-500 parts by weight of a filler.

The polyvinyl chloride resin is not particularly limited as long as the polyvinyl chloride resin is not plasticized and has a glass transition temperature of about 80 ° C. However, a universal polyvinyl chloride resin which 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. When the amount is less than the above range, durability and mechanical properties are deteriorated. When the amount is in excess of the above range, the processability is lowered.

The acrylic resin may be polymethyl methacrylate having a relatively high glass transition temperature and rigidity to perform the role of plasticizer and / or processing aid.

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

The acrylic monomers may be alkyl acrylate monomers or alkyl methacrylate monomers or mixtures of alkyl acrylate monomers and alkyl methacrylate monomers.

Examples of the alkyl acrylate monomers include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, Butyl acrylate, butyl acrylate, amyl acrylate, isoamyl acrylate, n-hexyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, pentadecyl acrylate, dodecyl acrylate, isobornyl acrylate, Acrylate, benzyl acrylate, phenoxyethyl acrylate, 2-hydroxyethyl acrylate, 2-methoxyethyl acrylate, glycidyl acrylate, and allyl acrylate.

Examples of the alkyl methacrylate monomer include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, sec- Acrylates such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, butyl methacrylate, butyl methacrylate, amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, cyclohexyl methacrylate, Methacrylate, isobornyl methacrylate, phenyl methacrylate, benzyl methacrylate, phenoxyethyl methacrylate, 2-hydroxyethyl methacrylate, 2-methoxyethyl methacrylate, glycidyl methacrylate Acrylate, acrylate, allyl methacrylate, and the like.

The polymethyl methacrylate may further include other monomers besides the methyl methacrylate and the acrylic monomer.

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,? -Methylstyrene, p-methylstyrene, and m-methylstyrene; Vinyl acetate; Vinyl pyridine; Unsaturated nitriles such as acrylonitrile and methacrylonitrile; Vinyl ketone; Halogen-containing monomers such as vinyl chloride, vinylidene chloride and vinylidene fluoride; Acrylamide, unsaturated amides of methacrylamide, and the like.

One example of the polymethylmethacrylate may be a copolymer of methyl methacrylate and methacrylic acid, or a copolymer of methyl methacrylate and methyl acrylate and methacrylic acid. In the present invention, preferably, methyl methacrylate having excellent scratch resistance 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 the effect of increasing the hardness of the high-grade vinyl tile 20 can not be expected. If it exceeds the above range, the workability is deteriorated. May be used.

The acrylic resin may have a weight average molecular weight (Mw) of 10,000 to 300,000 g / mole, or 20,000 to 150,000 g / mole. If the amount is less than the above range, polymerization is difficult and the effect of improving surface physical properties is insignificant. If it exceeds the above range, compatibility with the polyvinyl chloride resin and workability are not good, And may have a weight average molecular weight within the above range that can be implemented.

The acrylic resin may have a melt index (MI) of 65-90 g / 10 min (230 ° C, 3.8 kg) or 75-85 g / 10 min (230 ° C, 3.8 kg). If it is outside the above range, the flowability is too low or high, and the workability is poor, so that an acrylic resin satisfying the melt index within the above range can be used.

The Brookfield viscosity of the acrylic resin may be 450-600 cps or 500-550 cps at 23 [deg.] C. If it is outside the above range, the acrylic resin having a Brookfield viscosity within the above range can be used because the flowability is too low or high and the workability is poor.

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. When the amount is less than the above range, the processability is deteriorated. If it exceeds the above range, economical efficiency is lowered due to excessive use of the acrylic resin, which is about 2.5 times as expensive as the polyvinyl chloride resin.

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

In this case, since the base layer of the present invention includes polymethyl methacrylate, the plasticizer content can be minimized as compared with the conventional polyvinyl chloride alone resin composition.

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

As the phthalate plasticizer, dioctyl phthalate may be used, but it is not limited thereto.

As the terephthalate-based plasticizer, dioctyl terephthalate may be used, but it is not limited thereto.

Examples of the benzoate plasticizer include 2- (2- (2-phenylcarbonyloxyethoxy) ethoxy) ethylbenzoate, glyceryl tribenzoate, trimethylolpropane tribenzoate, isononyl benzoate, Ethylbenzoate, 2,2,4-trimethyl-1,3-pentanediol dibenzoate, n-hexylbenzoate or trimethylolpropane tribenzoate can be used in the present invention. But are not limited thereto.

As the citrate plasticizer, acetyl tributyl citrate, acetyl triisobutyl citrate, acetyl triethyl hexyl citrate or tributyl citrate may be used, but the present invention is not limited thereto.

As the phosphate-based plasticizer, tricresyl phosphate or tributyl phosphate can be used, but the present invention is not limited thereto.

The adipate plasticizer may be bis (2-ethylhexyl) adipate, dimethyl adipate, monomethyl adipate or dioctyl adipate diisononyl adipate, but is not limited thereto.

The plasticizer may be used in an amount of 2-15 parts by weight or 4-10 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. If the amount is less than the above range, the processability and physical properties are deteriorated. If it exceeds the above range, the effect of increasing the hardness of the high-grade vinyl tile can not be expected.

The filler may be at least one selected from the group consisting of calcium carbonate, wood powder, mica, amorphous silica, talc, zeolite, calcium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, aluminum oxide, kaolin, ATH (Alumina trihydrate) And preferably calcium carbonate, which is inexpensive, can be used.

The filler may be used in an amount of 100-500 parts by weight or 100-400 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. When the amount is less than the above range, there is a fear of an increase in the price. When the amount exceeds the above range, the workability is lowered.

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

The thermal stabilizer is not limited to the type required for conventional polyvinyl chloride resin processing. For example, an epoxidized soybean oil, a metal salt, a calcium-zinc system, a barium-zinc system, or a mixture thereof may be used. The heat stabilizer may be used in an amount of 1-6 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 of the base layer 21 is higher than that of the base layer containing only the polyvinyl chloride resin alone. It is effective.

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 material 1 is insignificant. If it exceeds the above range, the surface pilling property improving effect is large, but the workability is lowered.

The base layer 21 may have a thickness of 0.5-5 mm or 1-3 mm. If it is less than the above range, the effect of improving the surface padding of the tile flooring material 1 is insignificant. If it exceeds the above range, the tile flooring material 1 may be thicker than necessary and the manufacturing cost may increase.

The printing layer (22)

The printed layer 22 laminated on the base layer 21 is to provide various appearance and design effects to the flooring material. To 100 parts by weight of the polyvinyl chloride resin, 10-30 parts by weight of a plasticizer, 10 parts by weight of a heat stabilizer 1- 5 parts by weight and a pigment.

The polyvinyl chloride resin, the plasticizer and the heat stabilizer are the same as those of the polyvinyl chloride resin, the plasticizer and the heat stabilizer contained in the base layer 21 described above, so the overlapping description is omitted.

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

In the present invention, the printing layer 22 is formed on the surface of the white sheet through transfer printing. However, the present invention is not limited to this, and the base layer 21 may be formed directly on the base layer 21 by gravure, .

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

The transparent layer 23,

In addition, the transparent layer 23 laminated on the print layer 22 protects the underlying print pattern or pattern, and further improves the surface pressure by raising the hardness of the high-grade vinyl tile 1, 5-40 parts by weight or 10-30 parts by weight of a plasticizer may be added to 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 contained in the base layer 21 described above, the overlapping description is omitted.

If the content of the plasticizer contained in the transparent layer 23 is less than the above range, the processability and physical properties are deteriorated. If the content exceeds the above range, the effect of increasing the hardness of the high-grade vinyl tile can not be expected.

The transparent layer 23 may further include a heat stabilizer. Since the heat stabilizer is the same as the heat stabilizer included in the base layer 21 described above, the overlapping description is omitted.

The transparent layer 23 may be a film having a thickness of 150-500 占 퐉, or 200-400 占 퐉. If the thickness is less than the above range, it may be too thin to be damaged. Thus, it is difficult to protect the print layer 22 positioned below. If the thickness is too large, the material layer may be too thick, It is preferable to have a thickness within the range.

The glass transition temperature of the transparent layer 23 may be 20-70 캜, or 20-60 캜. The glass transition temperature is within a range that can be obtained by changing the content of the plasticizer in the transparent layer 23, and by having the glass transition temperature within the above range, the hardness of the high-grade vinyl tile 20 is further increased, have.

The surface treatment layer (24)

In addition, the tile flooring 1 of the present invention is selectively laminated on the transparent layer 23 to improve the scratch resistance and abrasion resistance of the surface of the flooring, and the surface treatment layer 24, (See Figure 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 0.005-0.1 mm or 0.01-0.05 mm. When the thickness is less than the above-mentioned range, it is difficult to expect an improvement in physical properties such as scratch resistance. When the thickness exceeds the above range, it is too thick to have a material cost or deteriorate the appearance quality of the flooring. .

Foam boards (10)

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

The foaming board 10 provides light weight to the flooring material and prevents discoloration due to moisture and unevenness of the flooring material. The foaming board 10 comprises 1-10 parts by weight of a foaming agent, 50-300 parts by weight of a filler 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 those of the polyvinyl chloride resin and the filler included in the base layer 21 described above, so that overlapping description is omitted.

When the amount of the foaming agent contained in the foam board 10 is less than the above range, the weight of the bottom material becomes heavy. If the content of the foaming agent exceeds the above range, the foaming cells are over-formed to lower the surface physical properties and durability. .

The foaming rate of the foam board 10 may be 100-350% or 100-200%. When the amount is less than the above range, the lightweight property of the bottom material is deteriorated. If the above range is exceeded, the durability and strength are weakened and the physical properties are lowered.

Further, it may be 1-10 mm or 2-7 mm of the foam board 10. If the thickness is less than the above range, the hardness of the foam board is insufficient to prevent irregularities of the flooring. If the thickness exceeds the above range, the foaming board may become too thick and the material cost may be large.

Each layer of the tile flooring 1 of the present invention may further include other additives for selectively controlling the physical properties. The other additives may be one or more selected from among antistatic agents, ultraviolet absorbers, flame retardants, natural waxes, antioxidants, lubricants, colorants, stabilizers, wetting agents, thickeners, foaming agents, defoaming agents, coagulants, gelling agents, And the content thereof is not particularly limited.

The base layer 21, the print layer 22 and the transparent layer 23, except for the surface treatment layer 24 of the tile flooring 1 of the present invention, may be formed using, for example, extrusion molding, The respective layers may be produced in the form of a film or a sheet,

They may be laminated by heat and pressure using a plywood process or the like known in the art to form the high-grade vinyl tile 20, but the present invention is not limited thereto.

The foam board 10 can be manufactured by, for example, extrusion molding or car-rendering molding.

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

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

The surface puckering property may be 0.7 mm or less or 0.5 mm or less after pressing the tile floor material 1 at a pressure of 1000 psi for 24 hours and then measuring the depth of the plowing after 24 hours after removing the pressure.

If it exceeds the above range, the effect of improving the surface pushed property is insignificant, which is not preferable.

Further, the Shore D hardness of the tile flooring of the present invention may be 62-92 or 62-90.

In addition, the tile flooring of the present invention is lightweight and has the effect of preventing irregularities on the floor.

[Example]

1. Manufacture of tile flooring

≪ Example 1 >

(Base layer formation)

15 parts by weight of polymethyl methacrylate having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS 100), 0.1 part by weight of dioctyl terephthalate (LG Chem, DOTP) 7 parts by weight and calcium carbonate 270 parts by weight as a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

(Printing layer formation)

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 ) were kneaded with a Banbury mixer to 100 parts by weight of a polyvinyl chloride resin to prepare a white sheet composition.

Then, the composition for white sheet production is calender molded at a temperature of 160 DEG C to form a white sheet having a thickness of 0.1 mm.

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

(Formation of a transparent layer)

30 parts by weight of a plasticizer was kneaded with 100 parts by weight of a polyvinyl chloride resin with a Banbury mixer to prepare a composition for producing a transparent layer.

Subsequently, the transparent layer-forming composition is calender molded at a temperature of 160 캜 to form a transparent film having a thickness of 300 탆.

(Foam board)

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 was extruded into 100 parts by weight of a polyvinyl chloride resin to obtain a foam board having a thickness of 4.2 mm .

A printed layer was laminated on the base layer prepared above, and a transparent layer was laminated on the printed layer, followed by thermal lamination at a temperature of 160 ° C to produce a high-grade vinyl tile in which a base layer, a print layer and a transparent layer were laminated.

Thereafter, a foaming board was attached to the lower part of the high-grade vinyl tile using a hot-melt adhesive to produce the tile flooring of the present invention.

≪ Example 2 >

The tile flooring was prepared 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 having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS 100), 5 parts by weight of dioctyl terephthalate (LG Chem, DOTP) and 150 parts by weight of a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Example 3 >

Except that the base layer was made with the same composition as in Example 2 above and the transparent layer was made by the following composition and method.

(Formation of a transparent layer)

10 parts by weight of dioctyl terephthalate (LG Chem, DOTP) as a plasticizer was kneaded with 100 parts by weight of a polyvinyl chloride resin using a Banbury mixer to prepare a composition for producing a transparent layer.

Subsequently, the transparent layer-forming composition is calender molded at a temperature of 160 캜 to form a transparent film having a thickness of 300 탆.

≪ Comparative Example 1 &

The tile flooring was prepared 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)

30 parts by weight of dioctyl terephthalate (LG Chem, DOTP) as a plasticizer and 270 parts by weight of a filler were kneaded with 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS 100) using a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Comparative Example 2 &

The tile flooring was prepared 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 having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS 100), 1 part by weight of dioctyl terephthalate (LG Chem, DOTP) and 270 parts by weight of a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Comparative Example 3 &

The tile flooring was prepared 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 having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS100), 40 parts by weight of dioctyl terephthalate (LG Chem, DOTP) and 270 parts by weight of a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Comparative Example 4 &

The tile flooring was prepared 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 having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS 100), 0.1 part by weight of dioctyl terephthalate (LG Chem, DOTP) and 270 parts by weight of a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Comparative Example 5 &

The tile flooring was prepared 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 having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS 100), 0.1 part by weight of dioctyl terephthalate (LG Chem, DOTP) and 270 parts by weight of a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Comparative Example 6 >

The tile flooring was prepared 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 having a glass transition temperature of 105 占 폚 and a weight average molecular weight of 43,000 g / mole as an acrylic resin with respect to 100 parts by weight of a polyvinyl chloride resin (LG Chem, LS100), 40 parts by weight of dioctyl terephthalate (LG Chem, DOTP) and 270 parts by weight of a filler were kneaded with a Banbury mixer to prepare a base layer composition.

Subsequently, the base layer composition is calender molded at a temperature of 160 DEG C to form a base layer having a thickness of 1.3 mm.

≪ Comparative Example 7 &

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

(Formation of a transparent layer)

10 parts by weight of dioctyl terephthalate (LG Chem, DOTP) as a plasticizer was kneaded with 100 parts by weight of a polyvinyl chloride resin using a Banbury mixer to prepare a composition for producing a transparent layer.

Subsequently, the transparent layer-forming composition is calender molded at a temperature of 160 캜 to form a transparent film having a thickness of 300 탆.

≪ Reference Example 1 &

Except that the base layer was formed using polymethyl methacrylate having a molecular weight of 400,000 g / mole, which was composed of the same monomer and the same monomer ratios as those of the acrylic resin used in the base layer, The same composition and method were used to form the tile flooring.

≪ Reference Example 2 &

Except that the acrylic resin used in the base layer was composed of the same monomers and the same monomer ratios as in Example 1 except that the base layer was formed using polymethyl methacrylate having a molecular weight of 5,000 g / mole. The same composition and method were used to form the tile flooring.

2. Measurement of physical properties of tile flooring

The glass transition temperature (Tg) of the transparent layer and the base layer of Examples 1-3, Comparative Examples 1-7 and Reference Example 1-2 prepared in 1 above and the surface pressing property, workability and hardness of the tile flooring were measured, Table 1 shows the results.

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

The surface puckering was applied to the tile flooring at a pressure of 1000 psi for 24 hours, then the pressure was removed and the depth of pucking after 24 hours was measured.

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

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

Defective: the surface of the molded base layer is not smooth and it is worn out)

The hardness was measured with a Shore D hardness meter.

As shown in Table 1, Examples 1-3, which are tile flooring materials according to the present invention, include a rigid acrylic resin in the base layer and reduce the plasticizer content, thereby increasing the hardness of the high-grade vinyl tile, It can be confirmed that it is remarkably improved as compared with Comparative Example 1-7.

In particular, the transparent layer of the tile bottom material of Example 3 contained a small amount of plasticizer than Examples 1 and 2, and the glass transition temperature was further increased to confirm that the surface puckering property was remarkably improved.

On the other hand, Comparative Example 1, which does not include an acrylic resin in the base layer, does not improve surface compressibility and Comparative Example 2 in which the acrylic resin is contained in the base layer at less than the specified content range decreases the workability. It can be confirmed that the material of Comparative Example 3 containing a specific content exceeding the range of content is undesirably increased.

In addition, the base layer of the tile bottom material of Comparative Example 4 contained the plasticizer of the base layer and the plasticizer of the tile flooring of Comparative Example 5 containing the plasticizer in a specific content range, It was confirmed that the tile flooring of Comparative Example 6 containing all of the acrylic resin exceeding the specific content range had good processability but did not improve the surface compressibility.

In addition, the transparent layer of the tile bottom material of Comparative Example 7 contained a small amount of plasticizer than that of Comparative Example 1, but since the base layer does not contain acrylic resin, the effect of increasing the hardness of the high- It can be confirmed that the improvement in surface puckering is lowered.

In Reference Example 1, the acrylic resin contained in the base layer had a weight average molecular weight of more than 300,000 g / mole, resulting in lowered compatibility with the polyvinyl chloride resin, resulting in deteriorated workability, and the molecular weight of the acrylic resin It is confirmed that Reference Example 2 having less than 10,000 g / mole has lower surface padding improvement than Example 1-3 according to the present invention.

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

Claims (16)

A foam board 10; And a high-grade vinyl tile (20) laminated on the foam board,
The high-grade vinyl tile (20) comprises a base layer (21); A printing layer 22; And a transparent layer (23); ≪ / RTI >
Wherein the base layer (21) comprises 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 a polyvinyl chloride resin. The method according to claim 1,
Wherein the polyvinyl chloride resin has a degree of polymerization of 900-1800. The method according to claim 1,
Wherein the acrylic resin is polymethyl methacrylate. The method of claim 3,
Wherein the polymethyl methacrylate is a homopolymer of methyl methacrylate and a copolymer of methyl methacrylate and another acrylic monomer. 5. The method of claim 4,
Wherein 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,
Wherein the polymethyl methacrylate is a copolymer of methyl methacrylate and methacrylic acid or a copolymer of methyl methacrylate and methyl acrylate and methacrylic acid. The method according to claim 1,
Wherein the acrylic resin has a glass transition temperature of 85 to 120 占 폚. The method according to claim 1,
Wherein the acrylic resin has a weight average molecular weight (Mw) of 10,000 to 300,000 g / mole. The method according to claim 1,
Wherein the acrylic resin has a melt index (MI) of 65 to 90 g / 10 min (230 DEG C, 3.8 kg). The method according to claim 1,
Wherein the Brookfield viscosity of the acrylic resin is 450-600 cps at 23 占 폚. The method according to claim 1,
Wherein the base layer (21) has a glass transition temperature of 50-90 占 폚. The method according to claim 1,
Wherein the transparent layer (23) comprises 5-40 parts by weight of a plasticizer with respect to 100 parts by weight of the polyvinyl chloride resin. The method according to claim 1,
Wherein the transparent layer (23) has a glass transition temperature of 20-70 ° C. The method according to claim 1,
Wherein the transparent layer (23) has a glass transition temperature of 20-60 ° C. The method according to claim 1,
Wherein the tile flooring has a surface compressibility of 0.7 mm or less. The method according to claim 1,
Wherein the shore D hardness of the tile flooring is 62-92.

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