KR101816875B1 - Polypropylene eco-friendly flooring material and constructing method thereof - Google Patents

Abstract

The present invention relates to a NON-PVC polypropylene flooring material and is an invention relating to an environmentally friendly flooring material not containing a heavy metal and a phthalate plasticizer harmful to human body. More specifically, the present invention relates to a polyolefin resin composition, wherein all layers are made of a polyolefin resin such as polypropylene and are easy to regenerate, have excellent adhesiveness to an aqueous adhesive, excellent in dimensional stability, This invention relates to a flooring material.

Description

TECHNICAL FIELD [0001] The present invention relates to a polypropylene eco-friendly flooring material,

The present invention relates to a NON-PVC polypropylene flooring material and is an invention relating to an environmentally friendly flooring material which does not contain a heavy metal harmful to the human body and a phthalate plasticizer classified as an environmental hormone. More specifically, the present invention relates to a flooring material in which all layers are made of a polyolefin resin such as polypropylene, easy to regenerate, excellent in adhesion to an aqueous adhesive, and excellent in abrasion resistance, dimensional stability and flexibility.

Conventionally, polyvinyl chloride (PVC) has been used as a material for flooring. And polyvinyl chloride has been known to be harmful to human body as a plasticizer used together, there has been a demand for a flooring material to replace polyvinyl chloride.

In recent years, there has been an attempt to replace polyvinyl chloride with polyolefin resin, polyester resin or the like in response to growing interest in environmentally friendly materials. Particularly, polypropylene materials do not generate toxic gas during incineration, And it is widely applied to flooring, furniture or interior products due to its advantage of not polluting the soil due to corrosion.

In addition, in order to fix the flooring material to the floor in accordance with the demand for environment friendliness of the building interior material, construction using an environmentally friendly waterproofing agent that does not use an organic solvent is increasing. However, water-based adhesives have a disadvantage of poor adhesion to polyolefin resins known as environmentally friendly flooring materials. Most of the polyolefin resins are hydrophobic.

Therefore, it is very urgent to develop an eco-friendly flooring material which is excellent in adhesion to an aqueous adhesive and can be used in place of polyvinyl chloride.

As a result, not only has the basic properties required as a bottom material, that is, excellent abrasion resistance and dimensional stability, but also has flexibility that is excellent in workability even on a curved or concave bottom surface, and is environmentally friendly polypropylene having excellent adhesion with the above- The emergence of flooring is urgently required.

In order to solve the above problems, the present invention is to provide an environmentally friendly flooring material that does not contain a heavy metal and a phthalate plasticizer harmful to human body as a NON-PVC flooring material.

Further, the present invention is to provide a floor material in which the whole layer is made of a polyolefin resin such as polypropylene, and is easy to regenerate.

In addition, the present invention is intended to provide not only an adhesive using an organic solvent at the time of construction on a floor, but also a flooring having excellent adhesiveness to an aqueous adhesive.

It is another object of the present invention to provide a flooring which is excellent in flexibility and has excellent workability even on a floor surface having curvature or unevenness.

One aspect of the flooring of the present invention for achieving the above object

A transparent sheet containing a polypropylene resin,

Printing layer,

A white film comprising a polypropylene resin and a white pigment, and

A polypropylene resin, a hydrophilic polyolefin resin, and inorganic particles, and a lower sheet having one or more layers stacked thereon is sequentially laminated.

In one embodiment of the present invention, the transparent sheet may further include one or more functional layers selected from a hard coating layer, a non-slip layer, an antistatic layer and an ultraviolet barrier layer on the transparent sheet.

In one embodiment of the present invention, a reinforcing sheet comprising a polypropylene resin and inorganic particles between the white film and the lower sheet may be one or more layers.

In one embodiment of the present invention, the lower sheet may further comprise one or more layers of an adhesive film comprising a hydrophilic polyolefin resin at a lower portion thereof.

In one embodiment of the present invention, the white pigment is selected from titanium dioxide, calcium carbonate, barium sulfate, barium titanate, strontium titanate, calcium titanate, lead titanate, zinc oxide, zinc sulfide, magnesium oxide and aluminum oxide It may be any one or a mixture of two or more.

In one embodiment of the present invention, the lower sheet may be such that the solubility parameter 隆₁ of the polypropylene resin and the solubility parameter 隆₂ of the hydrophilic polyolefin resin satisfy the following formulas (1) and (2).

[Formula 1]

δ ₁ <δ ₂

[Formula 2]

0.1 ≤ | δ ₂ - δ ₁ |

In the above formulas 1 and 2, the unit is J ^1/2 / cm ^3/2 .

In one embodiment of the present invention, the hydrophilic polyolefin resin is selected from the group consisting of an ethylene-vinyl acetate copolymer, an ethylene-butyl acetate copolymer, an ethylene-methyl acetate copolymer, an ethylene- A grafted copolymer of an olefin with an unsaturated carboxylic acid or an anhydride thereof, and a salt thereof, or a mixture of two or more thereof selected from ethylene-ethyl acrylate copolymer, unsaturated carboxylic acid or anhydride thereof, and salts thereof.

In one embodiment of the present invention, the unsaturated carboxylic acid may be any one or more selected from maleic acid, maleic anhydride, acrylic acid, methacrylic acid, citraconic acid, citraconic anhydride, itaconic acid and itaconic anhydride.

In one embodiment of the present invention, the content of the hydrophilic polyolefin resin in the lower sheet may be 0.1 to 60% by weight.

In one embodiment of the present invention, the inorganic particles are selected from the group consisting of talc, calcium carbonate, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, barium sulfate, aluminum hydroxide, magnesium hydroxide, zinc oxide, , Asbestos, zeolite, silicate clay, glass fiber, fly ash, and whiskers.

In one embodiment of the present invention, the white sheet facing the lower sheet may be subjected to any one or two or more hydrophilization treatments selected from plasma treatment, UV-ozone treatment and corona discharge.

In one embodiment of the present invention, any one or two or more layers selected from the transparent sheet, the white sheet, the reinforcing sheet and the lower sheet may further comprise one or more selected from a polypropylene elastomer, a polyethylene elastomer and a polystyrene elastomer May include.

In one embodiment of the present invention, the polypropylene-based elastomer has a propylene content of 70 to 95% by weight, and the content of ethylene, 1-butene, 1-pentene, 1-hexene, A propylene-alpha-olefin copolymer system elastomer having a content of one or more alpha-olefins selected from 1-decene and 1-dodecene in an amount of 5 to 30% by weight, or a mixture of two or more selected from the group consisting of have.

In one embodiment of the present invention, the polyethylene-based elastomer has a content of ethylene of 70 to 95% by weight, and is selected from the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, And an ethylene-alpha-olefin copolymer system elastomer in which the content of one or more alpha-olefins selected from -O-decene and -dodecene is in the range of 5 to 30% by weight, or a mixture of two or more thereof .

In one embodiment of the present invention, the polystyrene elastomer is selected from the group consisting of a styrene-butadiene block copolymer elastomer, a hydrogenated styrene-butadiene elastomer, a styrene-isoprene block copolymer elastomer, a styrene-butadiene-styrene block copolymer elastomer, Styrene block copolymer elastomer, a styrene block copolymer elastomer, a styrene block copolymer elastomer, a styrene block copolymer elastomer, a styrene block copolymer elastomer, a styrene block copolymer elastomer, a styrene block copolymer elastomer, a styrene block copolymer elastomer, It may be a mixture.

In one aspect of the present invention, the transparent sheet, the print layer, the white film, and the lower sheet may be physically integrated by heat pressing.

In one aspect of the present invention, the transparent sheet, the print layer, the white film, the reinforcing sheet and the lower sheet may be physically integrated by heat pressing.

In one aspect of the present invention, the transparent sheet, the print layer, the white film, the lower sheet, and the adhesive film may be physically integrated by heat pressing.

In one aspect of the present invention, the transparent sheet, the print layer, the white film, the reinforcing sheet, the lower sheet, and the adhesive film may be physically integrated by heat pressing.

Another aspect of the present invention relates to a method of constructing a flooring,

a) applying an aqueous adhesive to the floor surface; And

b) adhering the bottom sheet of the bottom material facing the water-based adhesive so as to face each other;

. &Lt; / RTI &gt;

Another aspect of the present invention relates to a method of constructing a flooring,

a) applying an aqueous adhesive to the floor surface; And

b) adhering the adhesive film of the bottom material facing the water-based adhesive so as to face each other;

. &Lt; / RTI &gt;

The flooring according to the present invention does not contain a heavy metal and a phthalate plasticizer which are harmful to human body and can provide an environmentally friendly flooring material.

In addition, the present invention has an effect that the whole layer is made of a polyolefin resin such as polypropylene, easy to regenerate, and has excellent adhesiveness to an adhesive as well as an adhesive using an organic solvent at the time of construction.

Further, the present invention can provide a flooring material having excellent flexibility and excellent workability even on a floor surface having curvature or unevenness.

Further, the present invention is advantageous in that it can be manufactured by a simple method such as hot pressing without using an expensive adhesive, and is excellent in economy.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows an embodiment of the flooring material of the present invention.
Fig. 2 shows an embodiment of the flooring material of the present invention.
3 shows an embodiment of the flooring material of the present invention.
4 shows an embodiment of the flooring material of the present invention.
5 shows an embodiment of the flooring material of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail by way of examples or embodiments, including the accompanying drawings. It should be understood, however, that the invention is not limited thereto and that various changes and modifications may be made without departing from the spirit and scope of the invention.

Unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention is merely intended to effectively describe a specific embodiment and is not intended to limit the invention.

Also, the singular forms as used in the specification and the appended claims are intended to include the plural forms as well, unless the context clearly indicates otherwise.

In the present invention, the term 'flooring material' refers to a flooring material such as a tile flooring material, a long plate, or the like, which is generally used for flooring on a floor of a building or on the floor of a road.

In the present invention, 'hydrophilic polyolefin resin' means a polyolefin resin exhibiting hydrophilic properties compared to conventional polyolefin resins, and hydrophilic means the ability to be wetted with water or an aqueous solution. That is, the ability of water or aqueous solution to penetrate or disperse more easily into the surface. Generally, the polypropylene resin is hydrophobic and the hydrophilic polyolefin resin exhibits hydrophilicity in comparison with the polypropylene resin. In the present invention, the 'solubility parameter' can be used to indicate the degree of hydrophilicity. These solubility parameters are inherent characteristics of the resin showing the dissolution possibility according to the polarity of each resin molecule, and the solubility parameter for each resin is generally known. There are various methods for measuring the solubility parameter. In the present invention, the method described in Hoftyzer-Van Krevelen of Van Krevelen ("Properties of Polymers: Their Correlation with Chemical Structure", 3rd Ed, Elsevier, 1990) . &Lt; / RTI &gt;

The inventors of the present invention have studied to provide a floor material having excellent flexibility and excellent dimensional stability so as to further improve adhesion to an aqueous adhesive and smoothly adhere to uneven floor surfaces. As a result, By mixing a polypropylene resin, an inorganic particle and a hydrophilic polyolefin resin in combination, it is possible to further improve the flexibility of the flooring material without containing any additional plasticizer, to further improve the adhesiveness with the aqueous adhesive applied on the floor surface, And thus completed the present invention.

Further, the abrasion resistance, dimensional stability, adhesiveness and flexibility are further improved by further containing any one or two or more selected from polypropylene elastomer, polyethylene elastomer and polystyrene elastomer, and the bottom surface It was found that the smoothness of the surface of the bottom material was excellent. Thus, the present invention was completed.

One aspect of the present invention will be described with reference to the drawings, which are for illustrative purposes only, and are not limitative of the present invention.

The first aspect of the present invention, as shown in Figure 1,

A transparent sheet 10 comprising a polypropylene resin,

The printing layer 20,

A white film 30 comprising a polypropylene resin and a white pigment, and

A lower sheet 40 including a polypropylene resin, a hydrophilic polyolefin resin and inorganic particles, or a laminate of two or more layers may be sequentially laminated.

The second aspect of the present invention, as shown in Figure 2,

A transparent sheet 10 comprising a polypropylene resin,

The printing layer 20,

A white film 30 comprising a polypropylene resin and a white pigment,

A reinforcing sheet 50 comprising a polypropylene resin and inorganic particles and having one or more layers stacked,

A lower sheet 40 including a polypropylene resin, a hydrophilic polyolefin resin and inorganic particles, or a laminate of two or more layers may be sequentially laminated.

The third aspect of the present invention, as shown in Figure 3,

Any one or two or more functional layers (60) selected from a hard coat layer, a non-skid layer, an antistatic layer and an ultraviolet barrier layer,

A transparent sheet 10 comprising a polypropylene resin,

The printing layer 20,

A white film 30 comprising a polypropylene resin and a white pigment, and

A lower sheet 40 including a polypropylene resin, a hydrophilic polyolefin resin and inorganic particles, or a laminate of two or more layers may be sequentially laminated.

The fourth aspect of the present invention, as shown in Fig. 4,

Any one or two or more functional layers (60) selected from a hard coat layer, a non-skid layer, an antistatic layer and an ultraviolet barrier layer,

A transparent sheet 10 comprising a polypropylene resin,

The printing layer 20,

A white film 30 comprising a polypropylene resin and a white pigment,

A reinforcing sheet 50 comprising a polypropylene resin and inorganic particles and having one or more layers stacked,

A lower sheet 40 including a polypropylene resin, a hydrophilic polyolefin resin and inorganic particles, or a laminate of two or more layers may be sequentially laminated.

The fifth aspect of the present invention, as shown in Fig. 5,

Any one or two or more functional layers (60) selected from a hard coat layer, a non-skid layer, an antistatic layer and an ultraviolet barrier layer,

A transparent sheet 10 comprising a polypropylene resin,

The printing layer 20,

A white film 30 comprising a polypropylene resin and a white pigment,

A reinforcing sheet 50 comprising a polypropylene resin and inorganic particles, one or more layers of which are laminated,

A lower sheet 40 comprising a polypropylene resin, a hydrophilic polyolefin resin, and inorganic particles and having one or more layers stacked, and

And an adhesive film 70 comprising a hydrophilic polyolefin resin may be successively laminated.

The transparent sheet, the print layer, the white film, the reinforcing sheet, the lower sheet, and the adhesive film may each be a single layer or a multi-layered sheet laminated with two or more layers, respectively, although not explicitly mentioned in the present invention. When two or more layers are laminated, it is obvious that each layer may be composed of the same or different composition.

Hereinafter, each layer of the present invention will be described in more detail.

1) Transparent sheet

In one embodiment of the present invention, the transparent sheet serves to protect the print layer, and it is preferable that the transparent sheet is transparent from the viewpoint of making the print pattern and the like of the print layer visible. The present invention may be the use of a polypropylene resin for all layers in order to facilitate recycling. Therefore, the transparent sheet includes a polypropylene resin. More specifically, the polypropylene resin may be a copolymer including a propylene homopolymer, a block copolymer, or propylene in the form of a random copolymer. It may be a homopolymer or random copolymer having excellent transparency in terms of ensuring print visibility, but it may be a transparent block copolymer which is somewhat lacking in transparency but excellent in abrasion resistance and low-temperature dimensional stability. Also, the melt index may be 0.1 to 100 g / 10 min measured at 230 캜 and 2.16 kg in accordance with ASTM D1238, but is not limited thereto.

In addition, if necessary, additives such as antioxidants, UV stabilizers, processing lubricants and the like which can be added during extrusion processing can be used without limitation. The content can be added within a range that does not affect the physical properties such as transparency and strength of the transparent sheet.

The antioxidant may be selected from the group consisting of 1,1,3-tris (2-methyl-4-hydroxy-5-tris-butylphenyl) butane, 1,3,5-trimethyl- -Tetra-butyl-4-hydroxybenzyl) benzene, tetrakis- [methylene 3- (3'5'-di- tert- butyl-4-hydroxyphenyl) propynate], bis [ Tert-butylphenyl) butyl ester] glycol ester, 1,3,5-tris (3 ', 5'-di-tris- (1H, 3H, 5H) trione, 3,5-di-t-butyl-4-hydroxyhydrocinnamate octadecyl, tris (2,4-di-tert-butylphenyl) phosphate, 9,10-dihydro 9-oxa-10-phosphapenin trene-10-oxide, cyclic neopentanetetraylbis Bis (3,5-di-tert-butylphenyl) phosphite, cyclic neopentanetetraylbis (2,4-di-tert-butylphenyl) Hydroxyhydrocinomo 1-yl) hydrazine, and the like, but is not limited thereto.

The UV stabilizer may be selected from the group consisting of benzophenone, phenyl silicate, bis (2,2,6,6-tetramethyl-4-piperidinyl) sebacate, benzotriazole based 2- (3'-5'- 2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-di-t-butylphenyl-2-hydroxyphenyl) (3'-tris-butyl-2'-hydroxy-5'-methylphenyl) -5-chlorobenzotriazole and a hindered amine-based ultraviolet stabilizer (HALS) And the like, may be used, but the present invention is not limited thereto.

The working lubricant may be selected from the group consisting of zinc stearate, oleamide, erucamide, ethylene bis stearamide, stearamide, behenamide, and the like, but is not limited thereto.

In addition, when one or more selected from the group consisting of a polypropylene elastomer, a polyethylene elastomer and a polystyrene elastomer is further contained, the abrasion resistance and the flexibility are further improved to facilitate the installation on the curved bottom surface, It is possible to further reduce the adhesion of the lower layer to the printing layer, the adhesiveness, and the visibility without using a separate adhesive.

The content of any one or two or more selected from the polypropylene-based elastomer, the polyethylene-based elastomer and the polystyrene-based elastomer is 1 to 50% by weight, preferably 5 to 45% by weight based on the total weight of the resin composition constituting the transparent sheet, But it is not limited thereto. At this time The content of the polypropylene resin may be 50 to 99% by weight, more specifically 55 to 95% by weight, and more preferably 60 to 80% by weight, but is not limited thereto.

The polypropylene-based elastomer has a propylene content of 70 to 95% by weight, and the content of ethylene, 1-butene, 1-pentene, 1-hexene, And a propylene-alpha-olefin copolymer system elastomer in which the content of one or more alpha-olefins is 5 to 30% by weight. Specific examples of the propylene-ethylene copolymer elastomer include propylene-ethylene copolymer elastomer such as Vistamaxx manufactured by ExxonMobil, Grade 2120, 2125, 2320, 2330, 3000, 3020FL, 3980FL, 6102FL, 6202, 6202FL, But are not limited to, elastomers such as Notio, grade PN-2070, PN-3560, PN-0040, and PN-2060 available from Mistui Chemicals.

Wherein the polyethylene-based elastomer has an ethylene content of 70 to 95% by weight, and the content of ethylene is 1 to 10% by weight, Or an ethylene-alpha-olefin copolymer system elastomer having a content of at least two alpha-olefins of 5 to 30% by weight, or a mixture of two or more thereof. Specific examples of the commercialized elastomer include ethylene-1-butene copolymer elastomer such as Tafmer, Grade DF605, DF610, DF640, DF710, DF740, DF7350, DF810, DF840, DF8200, DF940, DF9200, DF110, A- 8140, 8150, 8100, 8100, 8100, 8100, 8100, 8100, and 8100, which are ethylene-1-octene copolymer system elastomer, Dow Chemical Co., 8200, 8400, 8452, 8411, 8003, 8440, 8480, 8402, 8540, and the like.

The polystyrene-based elastomer is a styrene-containing copolymer elastomer. Specific examples thereof include a styrene-butadiene block copolymer elastomer, a hydrogenated styrene-butadiene elastomer, a styrene-isoprene block copolymer elastomer, a styrene-butadiene-styrene block copolymer elastomer Ethylene-butylene-styrene block copolymer elastomer, a styrene-ethylene-butylene-styrene block copolymer elastomer, a styrene-butadiene-styrene block copolymer elastomer, a styrene- . They may be used singly or in combination of two or more. Specific examples of commercially available elastomers include hydrogenated styrene-butadiene elastomers such as Dynaron, Grade 1320P, 1321P, 2324P, 4600P, 6100P, 6200P, 8600P and 9901P manufactured by JSR Corporation, and styrene-ethylene-butylene- But are not limited to, Kraton, Grade G1650, G1651, G1652, G1654, and G1657 manufactured by Kraton Polymers, which is a coalesced elastomer.

In one embodiment of the present invention, the thickness of the transparent sheet is not limited, but may be 100 to 5000 탆, preferably 200 to 3000 탆, more preferably 300 to 1000 탆, Dimensional stability and the like, but is not limited thereto.

In addition, if necessary, the outermost layer of the transparent sheet may be provided with irregularities or emboss patterns on the surface thereof to give a feeling similar to a natural wood pattern or to provide a slip prevention effect.

If necessary, the surface of the transparent sheet facing the print layer is subjected to a hydrophilic treatment such as a plasma treatment or a corona discharge treatment, so that adhesion and adhesion with the print layer can be further improved without using any other adhesive. Accordingly, the visibility can be further improved. The transparent sheet using the composition of the present invention has an excellent adhesive property to the print layer by hot pressing without using an adhesive. However, in order to exhibit stronger adhesion with the print layer, a separate adhesive may be applied to the surface of the transparent sheet facing the print layer, and the use of the adhesive is not excluded.

2) Printed layer and white film

In one embodiment of the present invention, the print layer may be a print layer formed by a known printing method such as screen printing, offset printing, or gravure printing on a white film having a white hiding property by a white pigment. Or a paper or film-like printing paper having an adhering surface such as a sticker may be laminated. However, from the viewpoint of recycling the bottom material, it is preferable to use a printing method. However, the present invention is not limited thereto and is not limited as long as it is a method for forming a printing layer conventionally used in the field.

In one aspect of the present invention, the white film may be white to make printing of the printing layer visible, and to hide the color of the lower lower sheet.

If necessary, a small amount of a conventional color pigment may be added in addition to a white pigment in order to give a deep aesthetics such as a wood pattern. The kind of the colored pigment is not particularly limited, but an inorganic colored pigment may be preferable in view of heat resistance and weatherability, but the present invention is not limited thereto.

May include polypropylene and a white pigment from the viewpoint of producing a white film, and any additives which can be added during extrusion processing, such as antioxidants, UV stabilizers, and processing lubricants, Can be used.

More specifically, the polypropylene resin used for the white film may be a copolymer including propylene homopolymer, block copolymer, or propylene in the random copolymer form. A block copolymer may be used from the viewpoint of flexibility and low temperature dimensional stability. Also, the melt index may be 0.1 to 100 g / 10 min measured at 230 캜 and 2.16 kg in accordance with ASTM D1238, but is not limited thereto.

The white pigment may be at least one selected from the group consisting of titanium dioxide, calcium carbonate, barium sulfate, barium titanate, strontium titanate, calcium titanate, lead titanate, zinc oxide, zinc sulfide, magnesium oxide, But is not limited thereto. When the amount of the white pigment is too large, breakage may occur during the production of the sheet. In the case where the white pigment is used in an excessively small amount, it may be difficult to conceal the white pigment. But it is not limited thereto, and the whiteness degree may be controlled by adjusting the content as necessary. Further, the white pigment may be surface-modified from the viewpoint of further improving the moldability upon extrusion and further improving the dispersibility of the white pigment. Specifically, it may be surface-treated with a silane compound or the like. Further, from the viewpoint of further improving the dispersibility, the master batch in which the white pigment and the polypropylene resin are melt-blended beforehand may be used.

Further, if necessary, one or more selected from the above-mentioned polypropylene type elastomer, polyethylene type elastomer and polystyrene type elastomer is further contained, thereby further improving the flexibility and further improving the adhesion and adhesion with the transparent sheet . The content of one or more selected from the polypropylene-based elastomer, the polyethylene-based elastomer and the polystyrene-based elastomer may be 1 to 30% by weight, preferably 5 to 20% by weight based on the total weight of the resin composition constituting the white film, But is not limited thereto.

Further, in the case where a hydrophilic polyolefin resin is further included if necessary, it is possible to further improve the adhesion with the lower sheet layer without any additional adhesive and hydrophilic treatment, and to easily apply the ink for printing, can do.

The hydrophilic polyolefin resin is a resin which is hydrophilic compared to a polypropylene resin. In the present invention, the degree of hydrophilicity can be expressed by a solubility parameter.

More specifically, the solubility parameter 隆₁ of the polypropylene resin and the solubility parameter 隆₂ of the hydrophilic polyolefin resin may be ranges satisfying the following formulas (1) and (2). Within this range, adhesiveness, flexibility and mechanical It is possible to provide a flooring material having excellent strength.

[Formula 1]

δ ₁ <δ ₂

[Formula 2]

0.1 ≤ | δ ₂ - δ ₁ |

In the above formulas 1 and 2, the unit is J ^1/2 / cm ^3/2 .

More specifically, | δ ₂ - δ ₁ | May be 0.1 to 40 J ^1/2 / cm ^3/2 .

In one example, the solubility parameter of the polypropylene is 17.2 J ^1/2 / cm ^3/2 and the solubility parameter of polyvinyl acetate is 18.0-19.1 J ^1/2 / cm ^3/2 .

Specific examples of the hydrophilic polyolefin resin include ethylene-vinyl acetate copolymer, ethylene-butyl acetate copolymer, ethylene-methyl acetate copolymer, ethylene-acrylic acid-glycidyl methacrylate copolymer, ethylene-methacrylate copolymer An ethylene-ethyl acrylate copolymer, an unsaturated carboxylic acid or its anhydride and a grafted copolymer of an olefin and a salt thereof, or a mixture of two or more thereof. The content thereof may be 1 to 20% by weight, preferably 5 to 15% by weight based on the total weight of the resin composition constituting the white film, but is not limited thereto.

Specific examples of the unsaturated carboxylic acid may be any one or more selected from maleic acid, maleic anhydride, acrylic acid, methacrylic acid, citraconic acid, citraconic anhydride, itaconic acid, and itaconic anhydride, It is not. May be one that, for a specific example of such salts, Na ^+, Li ^+, Ka ^+, Zn ^{2 +,} Co ^{2 +,} Ni ^{2 +,} Mn ^{2 +,} Pb ^2+, Cu ^{+ 2} and Mg ^{+ 2} selected from, But is not limited thereto. The degree of neutralization of the carboxyl group may be from 30 to 99.9 mol%, and it is preferable because it can provide a flooring having excellent adhesiveness and excellent mechanical properties within the above range.

More specifically, the hydrophilic polyolefin resin may be an ethylene-vinyl acetate copolymer having a vinyl acetate content of 30 wt% or more, or an ionomer in which some of the carboxyl groups of the ethylene- (meth) acrylic acid copolymer are neutralized with a salt. Specific examples of the ethylene- (meth) acrylic acid copolymer may include an ethylene acrylic acid copolymer and an ethylene methacrylic acid copolymer, and if necessary, an ethylene-itaconic acid copolymer, an ethylene maleic anhydride copolymer, an ethylene maleic anhydride copolymer Copolymers and ethylene-maleic anhydride monoethyl-co-polymers. Commercial examples of the ionomer include, but are not limited to, the Surlyn series manufactured by DuPont.

In one embodiment of the present invention, the white film may contain 60 to 99% by weight of a polypropylene resin and 1 to 40% by weight of a white pigment.

In one embodiment of the present invention, the white film comprises 60 to 98% by weight of a polypropylene resin, 1 to 30% by weight of a white pigment and one or a mixture of two or more selected from a polypropylene elastomer, a polyethylene elastomer and a polystyrene- 30% by weight.

In one embodiment of the present invention, the white film may comprise 60 to 98% by weight of a polypropylene resin, 1 to 30% by weight of a white pigment and 1 to 20% by weight of a hydrophilic polyolefin resin.

In one embodiment of the present invention, the white film comprises 60 to 97% by weight of a polypropylene resin, 1 to 30% by weight of a white pigment, 1 to 20% by weight of a hydrophilic polyolefin resin, and a polypropylene- And 1 to 30% by weight of any one or two or more selected mixtures.

In one embodiment of the present invention, the thickness of the white film is not limited, but it may be 10 to 300 탆, preferably 30 to 250 탆, more preferably 100 to 200 탆. But is not limited to, achieving a concealment effect in this range.

If necessary, one or two or more hydrophilization treatments selected from plasma treatment, UV-ozone treatment, and corona discharge may be applied to the opposite surface of the white film on which the print layer is formed, Thereby further improving the adhesion with the lower sheet.

3)

In one embodiment of the present invention, the bottom sheet is prepared by mixing a polypropylene resin, inorganic particles and a hydrophilic polyolefin resin as a layer facing the adhesive on the bottom surface of the bottom sheet, thereby obtaining an aqueous adhesive as well as an adhesive using an organic solvent It is excellent in adhesiveness, flexibility, and dimensional stability.

The content of the constituent components of the lower sheet is not limited, but is preferably 5 to 70% by weight of a polypropylene resin, 5 to 70% by weight of a hydrophilic polyolefin resin and 20 to 90% by weight of an inorganic particle %. &Lt; / RTI &gt;

The polypropylene resin may be a copolymer containing propylene homopolymer, block copolymer or propylene in the form of random copolymer. The block copolymer may be used in view of excellent impact resistance. Also, the melt index may be 0.1 to 100 g / 10 min measured at 230 캜 and 2.16 kg in accordance with ASTM D1238, but is not limited thereto.

The hydrophilic polyolefin resin is a resin which is hydrophilic compared to a polypropylene resin. In the present invention, the degree of hydrophilicity can be expressed by a solubility parameter.

More specifically, the solubility parameter 隆₁ of the polypropylene resin and the solubility parameter 隆₂ of the hydrophilic polyolefin resin may be ranges satisfying the following formulas (1) and (2). Within this range, adhesiveness, flexibility and mechanical It is possible to provide a flooring material having excellent strength.

[Formula 1]

δ ₁ <δ ₂

[Formula 2]

0.1 ≤ | δ ₂ - δ ₁ |

In the above formulas 1 and 2, the unit is J ^1/2 / cm ^3/2 .

More specifically, | δ ₂ - δ ₁ | May be 0.1 to 40 J ^1/2 / cm ^3/2 .

In one example, the solubility parameter of the polypropylene is 17.2 J ^1/2 / cm ^3/2 and the solubility parameter of polyvinyl acetate is 18.0-19.1 J ^1/2 / cm ^3/2 .

More specifically, examples of the hydrophilic polyolefin resin include an ethylene-vinyl acetate copolymer, an ethylene-butyl acetate copolymer, an ethylene-methyl acetate copolymer, an ethylene-acrylic acid-glycidyl methacrylate copolymer, an ethylene- Grafted copolymers of unsaturated carboxylic acids or their anhydrides with olefins and ionomers in which some of the carboxyl groups of the copolymer are neutralized with alkali metal cations or ammonium ions .

Specific examples of the unsaturated carboxylic acid may be any one or more selected from maleic acid, maleic anhydride, acrylic acid, methacrylic acid, citraconic acid, citraconic anhydride, itaconic acid, and itaconic anhydride, It is not. May be one that, for a specific example of such salts, Na ^+, Li ^+, Ka ^+, Zn ^{2 +,} Co ^{2 +,} Ni ^{2 +,} Mn ^{2 +,} Pb ^2+, Cu ^{+ 2} and Mg ^{+ 2} selected from, But is not limited thereto. The degree of neutralization of the carboxyl group may be from 30 to 99.9 mol%, and it is preferable because it can provide a flooring having excellent adhesiveness and excellent mechanical properties within the above range.

More specifically, the hydrophilic polyolefin resin may be an ethylene-vinyl acetate copolymer having a vinyl acetate content of 30 wt% or more, or an ionomer in which some of the carboxyl groups of the ethylene- (meth) acrylic acid copolymer are neutralized with a salt. Specific examples of the ethylene- (meth) acrylic acid copolymer may include an ethylene acrylic acid copolymer and an ethylene methacrylic acid copolymer, and if necessary, an ethylene-itaconic acid copolymer, an ethylene maleic anhydride copolymer, an ethylene maleic anhydride copolymer Copolymers and ethylene-maleic anhydride monoethyl-co-polymers. Commercial examples of the ionomer include, but are not limited to, the Surlyn series manufactured by DuPont.

In one embodiment of the present invention, the inorganic particles are used for improving dimensional stability. Specific examples thereof include talc, calcium carbonate, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, barium sulfate But is not limited to, any one or a mixture of two or more selected from aluminum hydroxide, magnesium hydroxide, zinc oxide, titanium oxide, alumina, mica, asbestos, zeolite, silicate clay, glass fiber, fly ash and whiskers .

The size of the inorganic particles is not limited, but may be an average particle diameter of 0.1 to 100 占 퐉, and a surface modified particle may be used from the viewpoint of further improving dispersibility and kneadability. Further, from the viewpoint of further improving the dispersibility, it may be a master batch prepared by preliminarily melt-mixing the inorganic particles and the polypropylene.

Any additive that can be added during extrusion processing, such as an antioxidant, a UV stabilizer, and a processing lubricant, may be used without limitation to further improve the moldability.

Further, as described above from the viewpoint of further improving the flexibility as needed, it may further comprise any one or a mixture of two or more selected from polypropylene elastomer, polyethylene elastomer and polystyrene elastomer. The content of at least one selected from the polypropylene elastomer, the polyethylene elastomer and the polystyrene elastomer is 1 to 50% by weight, preferably 3 to 30% by weight, more preferably 3 to 30% by weight, based on the total weight of the resin composition constituting the lower sheet But it is not limited thereto. More specifically, 5 to 70% by weight of a polypropylene resin, 5 to 70% by weight of a hydrophilic polyolefin resin, 20 to 89% by weight of an inorganic particle, and a mixture of one or more selected from the group consisting of a polypropylene elastomer, a polyethylene elastomer and a polystyrene elastomer By weight to 50% by weight.

In one embodiment of the present invention, the thickness of the lower sheet is not limited, but may be 100 to 10,000 탆, more preferably 500 to 5,000 탆.

The lower sheet may be formed by laminating one or more layers, and when two or more layers are laminated, the lower sheet may be manufactured by coextrusion, thermal lamination, or the like. Also, each layer may be composed of the same or different composition.

If necessary, one or two or more hydrophilization treatments selected from plasma treatment, UV-ozone treatment and corona discharge may be performed on the surface bonded to the bottom of the lower sheet or the surface laminated with the white sheet or the reinforcing sheet And may further improve adhesion.

In addition, if necessary, it may be provided with a recessed or embossed pattern on the surface bonded to the bottom of the lower sheet to provide a slip prevention effect.

4) Functional layer

In one embodiment of the present invention, the bottom material may further comprise any one or two or more functional layers selected from a hard coat layer, an anti-slip layer, an antistatic layer and an ultraviolet barrier layer on the upper part of the transparent sheet, .

The hard coating layer is intended to improve the strength of the bottom layer and to prevent scratches on the surface, and may be used without limitation as long as it is a composition commonly used in the field as a top coating layer. Specifically, it may be made of, for example, an ultraviolet curing resin. More specifically, resins such as urethane, acrylic, urethane-acryl, and epoxy may be used, but the present invention is not limited thereto.

The anti-slip layer may be formed by spraying silica, polypropylene powder, polypropylene powder modified with silane, etc., in order to prevent slipping during walking, but the present invention is not limited thereto. The polypropylene powder may be one obtained by pulverizing polypropylene pellets and using particles or powders of 0.1 to 5 mm in size.

The silane may be dimethyldimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetraethoxysilane, or the like, but is not limited thereto.

The antistatic layer is for preventing foreign matter such as dust from easily adhering to the surface. It may be a composition comprising an antistatic agent applied thereto, or a mixture of a polypropylene resin and an antistatic agent mixed in a sheet form have.

The ultraviolet barrier layer may be formed by applying a composition containing a UV screening agent or by blending a mixture of a polypropylene resin and a UV screening agent into a sheet to prevent yellowing due to sunlight.

The thickness of each layer of the functional coating layer is not limited, but may be 1 to 100 [mu] m.

5) Reinforced sheet

In an embodiment of the present invention, a reinforcing sheet comprising a polypropylene resin and an inorganic particle may be further included in one layer or two or more layers from the viewpoint of further enhancing the strength of the bottom as required.

The polypropylene resin may be a copolymer containing propylene homopolymer, block copolymer or propylene in the form of random copolymer. The block copolymer may be used in view of excellent impact resistance. Also, the melt index may be 0.1 to 100 g / 10 min measured at 230 캜 and 2.16 kg in accordance with ASTM D1238, but is not limited thereto.

The inorganic particles may be selected from the group consisting of talc, calcium carbonate, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, barium sulfate, aluminum hydroxide, magnesium hydroxide, zinc oxide, titanium oxide, alumina, mica, , Glass fiber, fly ash, whisker, and the like, but is not limited thereto.

The size of the inorganic particles is not limited, but may be an average particle diameter of 0.1 to 100 占 퐉, and a surface modified particle may be used from the viewpoint of further improving dispersibility and kneadability. Further, from the viewpoint of further improving the dispersibility, it may be a master batch prepared by preliminarily melt-mixing the inorganic particles and the polypropylene.

In order to further improve the moldability, additives such as antioxidants, UV stabilizers, processing lubricants and the like which can be added during extrusion processing can be used without limitation.

Further, as described above, from the viewpoint of further improving the elasticity and flexibility, if necessary, it may further comprise any one or a mixture of two or more selected from a polypropylene elastomer, a polyethylene elastomer and a polystyrene elastomer. The content of any one or two or more selected from the polypropylene-based elastomer, the polyethylene-based elastomer and the polystyrene-based elastomer may be 1 to 50% by weight, preferably 5 to 30% by weight based on the total weight of the resin composition constituting the reinforcing sheet But is not limited thereto.

In one embodiment of the present invention, the reinforcing sheet may comprise 5 to 80% by weight of a polypropylene resin and 20 to 95% by weight of an inorganic particle.

In one embodiment of the present invention, the reinforcing sheet comprises 5 to 70% by weight of a polypropylene resin, 20 to 90% by weight of an inorganic particle, and 1 to 100% by weight of a polypropylene elastomer, a polyethylene- 50% by weight.

In one embodiment of the present invention, the thickness of the reinforcing sheet is not limited, but may be 100 to 8,000 m, more preferably 500 to 3,000 m.

The reinforcing sheet may be one layer or two or more layers laminated. When two or more layers are laminated, the reinforcing sheet may be formed by coextrusion, thermal lamination, or the like. Also, each layer may be composed of the same or different composition.

6) Adhesive film

In one embodiment of the present invention, if necessary, it may further include one or two or more layers of an adhesive film containing the hydrophilic polyolefin resin for preventing curl while maintaining excellent adhesion with the adhesive under the lower sheet .

Particularly, when the thickness of the transparent sheet is too thick, curling occurs in the upward direction, and it may be difficult to catch the curl by only the lower sheet or the reinforcing sheet. Therefore, it is possible to prevent the occurrence of curling of the transparent sheet by further including an adhesive film made of only 100% resin so as to catch the curl by giving a contracting force to the lower portion of the lower sheet in the opposite direction. In this case, since the adhesive property to the water-based adhesive must be imparted at the same time, the adhesive film containing the hydrophilic polyolefin resin according to the present invention can solve this problem.

The adhesive film may be a hydrophilic polyolefin resin alone or a mixture of 30 to 99% by weight of a hydrophilic polyolefin resin and 1 to 70% by weight of a polypropylene resin. The thickness of the adhesive film is not limited, but it may be 30 to 300 탆, and more preferably 50 to 250 탆. In some cases, it is preferable that a plurality of adhesive films having different thicknesses and different compositions are prepared, and then one or more layers are laminated to each other, since it is easy to catch the curl.

In addition, if necessary, the surface of the lower sheet bonded to the bottom may have irregularities or embossed patterns to provide a slip prevention effect.

7) Manufacturing method

The method for producing the bottom material of the present invention is not particularly limited, but specifically, for example, a transparent sheet, a white film formed with a printing layer, a reinforcing sheet, a lower sheet, an adhesive film, And may be thermally press-bonded by a lamination method or the like to physically integrate them.

If necessary, the adhesive may be applied after bonding, but all the layers of the present invention can be integrated by heating and pressing since polypropylene, which is a thermoplastic resin, is used as a main component and the other resin also uses a polyolefin resin. Do.

In the case of the above-mentioned hot-pressing, in the case of the batch type, the hot-press is generally composed of multi-stages, and a white sheet, a reinforcing sheet, a lower sheet and an adhesive film are sequentially stacked It can be hot pressed at a temperature of 150 to 180 ° C for 10 to 60 minutes under a pressure of 30 to 50 kg / cm ² , and then cooled at room temperature for 10 to 60 minutes. A hard coat layer is formed on the transparent sheet layer of the resultant bottom sheet, and then heat-treated, dried and cut.

The continuous process is a process in which a film or sheet wound on several rolls is loosened one by one and joined together on a large roll, followed by hard coating treatment, heat treatment, drying and cutting.

8) Construction method

The flooring material of the present invention can be used not only for an adhesive using an organic solvent but also for adhesion to an aqueous adhesive, so that it can be applied to the floor surface using an aqueous adhesive.

It is also possible to construct the exterior wall of a building or the like.

More specifically, for example,

a) applying an aqueous adhesive to the floor surface; And

b) adhering the bottom sheet of the flooring material facing the water-based adhesive so that the bottom sheet faces each other;

. &Lt; / RTI &gt;

Also

a) applying an aqueous adhesive to the floor surface; And

b) adhering the adhesive material of the flooring facing the water-based adhesive so as to face each other;

. &Lt; / RTI &gt;

The aqueous adhesive is not limited as long as it is conventionally used in the field. Specifically, for example, an aqueous acrylic adhesive, a urethane adhesive and an epoxy adhesive can be used.

Hereinafter, the present invention will be described in more detail based on examples and comparative examples. However, the following examples and comparative examples are merely examples for explaining the present invention in more detail, and the present invention is not limited by the following examples and comparative examples.

The abrasion resistance, dimensional stability, flexibility and adhesion of the flooring specimens prepared according to the following examples and comparative examples were measured as follows.

1) Abrasion resistance evaluation

As a measure of abrasion resistance, based on ASTM D3389, the abrasion resistance was evaluated according to the evaluation criteria shown in Table 1 based on the amount (㎎) generated in the surface layer of the flooring material under the condition of the applied load of 1 kg and the number of times of abrasion of 10,000 times Respectively.

division ◎ (excellent) (Good) △ (Normal) X (bad) Wear amount (mg) Less than 50 Over 50
Less than 100 100 or more
Less than 500 500 or more

2) Evaluation of dimensional stability

The dimensional stability was evaluated by the KS M 3802 measuring method for the degree of decrease or extension after leaving the flooring material in a 150 ° C drying oven for 10 hours and evaluating the dimensional stability with the evaluation criteria shown in Table 2 based on the dimensional change (%) before and after the test.

division ◎ (excellent) (Good) △ (Normal) X (bad) Dimensional change (%) Less than 0.05 0.05 or more
Less than 0.1 0.1 or more
Less than 0.5 0.5 or more

3) Flexibility evaluation

Flexibility is achieved by placing a sample of tile-like flooring with a size of 6 (width) x 36 (length) inches and making it easier to adhere to the bottom surface, (◎ Excellent, ○ Good, △ Normal, X Bad). The average value of 10 senses was evaluated by four grades.

4) Evaluation of adhesion

The adhesive properties were evaluated by applying an aqueous acrylic adhesive (W-310SE, Hosung Co., Ltd.) and adhering the flooring materials according to Examples and Comparative Examples to the top of the adhesive agent after 24 hours.

When peeling does not occur: ○

When peeling occurs: x

5) Evaluation of print layer visibility

When the flooring according to Examples and Comparative Examples was viewed from the transparent layer after laminating, the degree of clear printing of the printing layer was visually determined.

When the print layer and the transparent sheet come in close contact with each other and appear very clear: ◎

When printing on the print layer is clearly visible:

When the print layer is blurred and unclear: x

[Example 1]

1) Production of transparent sheet

A propylene random copolymer (Korea Polyurethane Industry Co., Grade RJ6308, PP-A) having a melt index (230 DEG C, 2.16 Kg) of 10.0 g / 10 min and a melting point of 145 DEG C was prepared as one of the polypropylene resins. Extruded in a T-die casting sheet molding machine using PP-A to prepare a transparent sheet having a thickness of 300 占 퐉.

2) Production of white film and printing layer

A propylene block copolymer (Korea Petrochemical Industry, Grade CB5108, PP-B) having a melt index (230 DEG C, 2.16 Kg) of 10.0 g / 10 min and a melting point of 167 DEG C was prepared as one of the polypropylene resins. Further, titanium dioxide (TiO ₂ ) having an average particle diameter of 1.5 탆 was prepared as a white pigment. A composition of 85% by weight of PP-B and 15% by weight of TiO ₂ was compounded in a twin-screw extruder having a diameter of 70 mm and L / D 40 to prepare a white film having a thickness of 100 탆 in a T- die casting film molding machine Respectively. On one side of the prepared white film, a wood pattern was printed with a gravure printing machine.

3) Preparation of the lower sheet

An ethylene-vinyl acetate copolymer (DuPont ™ Elvax® 150, EVA) was prepared as one of the hydrophilic polyolefin resins. Further, calcium carbonate (CaCO ₃ ) having an average particle diameter of 1.7 탆 was prepared as inorganic particles. A composition pellet obtained by compounding 20% by weight of PP-B, 20% by weight of EVA and 60% by weight of CaCO _{3 in} a twin-screw extruder having a diameter of 70 mm and L / D 40 was used in a T- Was prepared.

4) Lumber

The transparent sheet, the white film on which the print layer was formed, and the lower sheet were stacked in this order, and then heated and pressed under the conditions of a pressure of 40 Kg / cm ² at 160 캜 for 30 minutes and cooled at room temperature for 30 minutes. An ultraviolet curing type urethane-acrylate hard coating agent (dim paint) was coated on the transparent sheet layer of the latex bottom material sample, and the coating was transferred to a heat treatment water bath and heat-treated at 90 캜, dried and cut at room temperature, A tile-type flooring sample having a width of 6 inches x 36 inches in length was prepared and physical properties were measured and are shown in Table 4 below.

[Example 2]

A polypropylene elastomer (ExxonMobill, Vistamaxx 3,000, PPE) having a melt index (230 DEG C, 2.16 Kg) of 7 g / 10 min and a Shore hardness of 36D was prepared as one of polypropylene elastomers. PP- A tile-type flooring sample having a thickness of 2.5 mm, a width of 6 inches and a length of 36 inches was prepared in the same manner as in Example 1, except that the composition was used in an amount of 25% by weight and a PPE content of 25% Respectively.

[Example 3]

A polyethylene-based elastomer (Dow Chemical Co., Engage 8452, PEE) having a melt index (190 占 폚, 2.16 Kg) 3 (g / 10 min) and a Shore hardness 24D was prepared as one of the polyethylene-based elastomers. In Example 1, 70% by weight of PP-A and 30% by weight of PEE were used in the production of the transparent sheet. A composition of 70 wt% of PP-B, 10 wt% of EVA and 20 wt% of TiO ₂ was used in the production of the white film. The procedure of Example 1 was repeated except that 15% by weight of PP-B, 20% by weight of EVA and 65% by weight of CaCO ₃ were used in the production of the lower sheet. And the physical properties of the tile-type flooring material were measured and shown in Table 4 below.

[Example 4]

Maleic anhydride graft polypropylene (DuPont, Fusabond P613, MAH-g-PP) having a melt index (230 DEG C, 2.16 Kg) of 49 g / 10 min and a melting point of 162 DEG C was prepared as one of the hydrophilic polyolefin resins. A composition pellet obtained by compounding 20% by weight of PP-B and 80% by weight of CaCO _{3 in} a twin-screw extruder having a diameter of 70 mm and L / D 40 was used to form a reinforcing sheet having a thickness of 1,000 탆 in a T- . The thickness of the transparent sheet was 400 탆, and a composition of 80% by weight of PP-B and 20% by weight of TiO ₂ was used in the production of a white film. In the production of the lower sheet, a composition of 15% by weight of PP-B, 20% by weight of MAH-g-PP and 65% by weight of CaCO ₃ was used and the thickness thereof was set to 1,000 탆 and a transparent sheet, A tile-type flooring sample having a thickness of 2.5 mm, a width of 6 inches and a length of 36 inches was prepared in the same manner as in Example 1, and physical properties were measured and shown in Table 4 below.

 [Example 5]

DuPont Surlyn 1707 (sodium ionomer, MFR 0.9 g / 10 min, density 0.95 g / cm 3, Ionomer), which is an ethylene-acrylic acid copolymer ionomer, was prepared as one of the hydrophilic polyolefin resins. In the production of the transparent sheet, a composition of 60% by weight of PP-A and 40% by weight of PPE was used and the thickness was set to 350 탆. In the production of the white film, a composition of 70 wt% of PP-B, 15 wt% of PPE and 15 wt% of TiO ₂ was used and the thickness was set to 150 탆. ₃ 50% by weight of the composition was used and the thickness was 1,300 탆. In the same manner as in Example 4 except that a composition of 5% by weight of PP-B, 10% by weight of PPE, 55% by weight of Ionomer and 30% by weight of CaCO ₃ was used in the production of the lower sheet, mm, a width of 6 inches x a length of 36 inches was prepared and physical properties were measured and shown in Table 4 below.

[Example 6]

A styrene-butadiene elastomer (JSR Dynaron, Grade 1320P, PSE) having a melt index (230 DEG C, 21.2 N) as one of the polystyrene elastomers was prepared. In the production of the transparent sheet, a composition of 75% by weight of PP-A and 25% by weight of PSE was used and the thickness was set to 450 μm. In the production of the white film, a composition of 80% by weight of PP-B and 20% by weight of TiO ₂ was used and the thickness was set to 150 μm. Two sheets of reinforcing sheets were prepared. In the preparation of the upper reinforcing sheet, a composition of 40% by weight of PP-B and 60% by weight of CaCO ₃ was used and a thickness of 900 탆 was used. 50% by weight and CaCO ₃ 50% by weight was used, and the thickness was set to 900 탆. In the same manner as in Example 4 except that a composition of 5% by weight of PP-B, 65% by weight of Ionomer and 30% by weight of CaCO ₃ was used in the production of the lower sheet and the thickness was 600 탆, A sample of tile-type flooring having a size of 36 inches in length was prepared and physical properties were measured and shown in Table 4 below.

[Example 7]

A transparent sheet made when PP-A 60% by weight, PPE 20% by weight, the composition of the PSE 20% by weight and was a thickness of 500 ㎛, PP-B 70% by weight in manufacturing the white film, PPE 10% by weight, TiO ₂ 20% by weight of the composition was used and the thickness was made 100 탆. 15% by weight of PP-B, 15% by weight of PPE and 70% by weight of CaCO ₃ were used in the production of the reinforcing sheet, and the thickness was 1,000 탆. Two sheets of the lower sheet were prepared. In the production of the lower sheet for the upper part, a composition of PP-B 60% by weight, EVA 10% by weight and CaCO ₃ 30% by weight was used and the thickness was set to 900 탆. Was prepared in the same manner as in Example 4, except that the composition of 5% by weight of PP-B, 85% by weight of EVA and 10% by weight of CaCO ₃ was used and the thickness was changed to 500 탆, A 36 inch size tile flooring sample was prepared and physical properties were measured and are shown in Table 4 below.

[Example 8]

First, an adhesive film having a thickness of 200 m was produced in a T-die casting film molding machine by using a composition obtained by dry blending a mixture of 10% by weight of PP-B and 90% by weight of EVA in a pellet state.

A transparent sheet made when PP-A 60% by weight, PPE 20% by weight, the composition of the PSE 20% by weight and was a thickness of 700 ㎛, PP-B 70% by weight in manufacturing the white film, PPE 10% by weight, TiO ₂ 20% by weight of the composition was used and the thickness was made 100 탆. 15% by weight of PP-B, 15% by weight of PPE and 70% by weight of CaCO ₃ were used in the production of the reinforcing sheet, and the thickness was 1,000 탆. Two sheets of the lower sheet were prepared. In the production of the lower sheet for the upper part, a composition of 60% by weight of PP-B, 10% by weight of EVA and 30% by weight of CaCO ₃ was used, Was prepared in the same manner as in Example 4, except that the composition of 5% by weight of PP-B, 85% by weight of EVA and 10% by weight of CaCO ₃ was used and the thickness was changed to 500 탆, A 36 inch size tile flooring sample was prepared and physical properties were measured and are shown in Table 4 below.

[Comparative Example 1]

In the production of the transparent sheet, a composition of PP-B of 85 wt% and TiO _{2 of} 15 wt% was used and a thickness of 100 탆 was used in the production of a white film, In the same manner as in Example 1 except that the composition of PP-B 20% by weight and EVA 80% by weight was used and the thickness thereof was changed to 2,100 탆, a tile-type A flooring sample was prepared and physical properties were measured and are shown in Table 4 below.

[Comparative Example 2]

In the production of the transparent sheet, a composition of 75% by weight of PP-A and 25% by weight of PPE was used and a thickness of 300 μm was used. In the production of a white film, a composition of 85% by weight of PP-B and 15% by weight of TiO ₂ was used, And a thickness of 2.5 mm and a width of 6 inches were measured in the same manner as in Example 1 except that the composition of PP-B and CaCO ₃ was changed to 35 wt% and 65 wt% A sample of tile-type flooring having a size of 36 inches in length was prepared and physical properties were measured and shown in Table 4 below.

division Layer composition Transparent sheet layer White film layer Reinforced sheet layer The lower sheet layer The adhesive film layer Example 1 Furtherance
(weight%) PP-A 100 PP-B 85,
TiO ₂ 15 - PP-B 20
EVA 20
CaCO ₃ 60 - thickness 300 탆 100 탆 - 2,100 μm - Example 2 Furtherance
(weight%) PP-A 75,
PPE 25 PP-B 85,
TiO ₂ 15 - PP-B 20
EVA 20
CaCO ₃ 60 - thickness 300 탆 100 탆 - 2,100 μm - Example 3 Furtherance
(weight%) PP-A 70
PEE 30 PP-B 70,
EVA 10
TiO ₂ 20 - PP-B 15
EVA 20
CaCO ₃ 65 - thickness 300 탆 100 탆 - 2,100 μm - Example 4 Furtherance
(weight%) PP-A 100 PP-B 80,
TiO ₂ 20 PP-B 30,
CaCO ₃ 70 PP-B 15
MAH-g-PP 20
CaCO ₃ 65 - thickness 400 탆 100 탆 1,000 탆 1,000 탆 Example 5 Furtherance
(weight%) PP-A 60
PPE 40 PP-B 70,
PPE 15,
TiO ₂ 15 PP-B 30,
PPE 20
CaCO ₃ 50 PP-B 5
PPE 10
Ionomer 55
CaCO ₃ 30 - thickness 350 탆 150 탆 1,300 탆 700 탆 Example 6 Furtherance
(weight%) PP-A 75
PSE 25 PP-B 80,
TiO ₂ 20 [Top] PP-B 40,
CaCO ₃ 60
[Lower] PP-B 50,
CaCO ₃ 50 PP-B 5
Ionomer 65
CaCO ₃ 30 - thickness 450 탆 150 탆 Upper / Lower
(900 占 퐉 / 900 占 퐉) 600 탆 Example 7 Furtherance
(weight%) PP-A 60
PPE 20
PSE 20 PP-B 70,
PPE 10,
TiO ₂ 20 PP-B 15,
PPE 15
CaCO ₃ 70 [Top] PP-B 60,
EVA 10, CaCO ₃ 30
[Lower] PP-B 5,
EVA 85, CaCO ₃ 10 - thickness 500 탆 100 탆 1,000 탆 Upper / Lower
(900 mu m / 500 mu m) - Example 8 Furtherance
(weight%) PP-A 60
PPE 20
PSE 20 PP-B 70,
PPE 10,
TiO ₂ 20 PP-B 15,
PPE 15
CaCO ₃ 70 [Top] PP-B 60,
EVA 10, CaCO ₃ 30
[Lower] PP-B 5,
EVA 85, CaCO ₃ 10 PP-B 10
EVA 90 thickness 700 탆 100 탆 1,000 탆 Upper / Lower
(500 탆 / 500 탆) 200 탆 Comparative Example 1 Furtherance
(weight%) PP-A 100 PP-B 85,
TiO ₂ 15 - PP-B 20
EVA 80 - thickness 300 탆 100 탆 - 2,100 μm - Comparative Example 2 Furtherance
(weight%) PP-A 75
PPE 25 PP-B 85,
TiO ₂ 15 - PP-B 35
CaCO ₃ 65 - thickness 300 탆 100 탆 - 2,100 μm -

division Properties Abrasion resistance Dimensional stability Adhesiveness flexibility Visibility Wear amount
(mg) evaluation Dimensional change
(%) evaluation Example 1 87 ○ 0.03 ◎ ○ ○ ○ Example 2 48 ◎ 0.04 ◎ ○ ◎ ◎ Example 3 40 ◎ 0.02 ◎ ○ ◎ ◎ Example 4 88 ○ 0.01 ◎ ○ ○ ○ Example 5 36 ◎ 0.04 ◎ ○ ◎ ◎ Example 6 39 ◎ 0.03 ◎ ○ ◎ ◎ Example 7 31 ◎ 0.01 ◎ ○ ◎ ◎ Example 8 30 ◎ 0.06 ○ ○ ◎ ◎ Comparative Example 1 88 ○ 6.72 X ○ ○ ○ Comparative Example 2 46 ◎ 0.02 ◎ X ◎ ◎

As shown in Table 4, the flooring material of Comparative Example 1 using a lower sheet made of a polypropylene-based composition containing a hydrophilic polyolefin but containing no inorganic particles is excellent in abrasion resistance, adhesiveness and flexibility, Poor. It was found that the flooring material of Comparative Example 2 using a lower sheet made of a polypropylene composition containing inorganic particles but not containing a hydrophilic polyolefin was excellent in abrasion resistance, hydrophilic stability and flexibility, but poor in adhesion. On the other hand, in the case of the flooring materials according to the present invention, the abrasion resistance, dimensional stability, adhesiveness, flexibility and visibility are all excellent.

10: Transparent sheet
20: Printed layer
30: white film
40:
50: reinforced sheet
60: Functional layer
70: Adhesive film layer

Claims (24)

A transparent sheet containing a polypropylene resin,
Printing layer,
A white film comprising a polypropylene resin and a white pigment, and
Wherein the bottom sheet comprises a polypropylene resin, a hydrophilic polyolefin resin, and inorganic particles, wherein one or more layers are stacked and the bottom sheet facing the adhesive on the bottom surface is laminated sequentially. The method according to claim 1,
Wherein the transparent sheet further comprises one or more functional layers selected from the group consisting of a hard coating layer, a non-slip layer, an antistatic layer, and an ultraviolet barrier layer on the transparent sheet. 3. The method according to claim 1 or 2,
And a reinforcing sheet comprising a polypropylene resin and inorganic particles between the white film and the lower sheet. 3. The method according to claim 1 or 2,
Wherein the lower sheet further comprises one or more layers of an adhesive film comprising a hydrophilic polyolefin resin. The method of claim 3,
Wherein the lower sheet further comprises one or more layers of an adhesive film comprising a hydrophilic polyolefin resin. The method according to claim 1,
The white pigment is any one or a mixture of two or more selected from titanium dioxide, calcium carbonate, barium sulfate, barium titanate, strontium titanate, calcium titanate, lead titanate, zinc oxide, zinc sulfide, magnesium oxide, Flooring. The method according to claim 1,
Wherein the lower sheet has a solubility parameter 隆₁ of the polypropylene resin and a solubility parameter 隆₂ of the hydrophilic polyolefin resin satisfy the following formulas (1) and (2).
[Formula 1]
δ ₁ <δ ₂
[Formula 2]
0.1 ≤ | δ ₂ - δ ₁ |
In the above formulas 1 and 2, the unit is J ^1/2 / cm ^3/2 . The method according to claim 1,
The hydrophilic polyolefin resin may be an ethylene-vinyl acetate copolymer, an ethylene-butyl acetate copolymer, an ethylene-methyl acetate copolymer, an ethylene-acrylic acid-glycidyl methacrylate copolymer, an ethylene-methacrylate copolymer, Acrylate copolymer, an unsaturated carboxylic acid or its anhydride and a grafted copolymer of an olefin and salts thereof. 9. The method of claim 8,
Wherein the unsaturated carboxylic acid or its anhydride is any one or more selected from maleic acid, maleic anhydride, acrylic acid, methacrylic acid, citraconic acid, citraconic anhydride, itaconic acid and itaconic anhydride. The method according to claim 1,
Wherein a content of the hydrophilic polyolefin resin in the lower sheet is 5 to 70% by weight. The method according to claim 1,
The inorganic particles may be selected from the group consisting of talc, calcium carbonate, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, barium sulfate, aluminum hydroxide, magnesium hydroxide, zinc oxide, titanium oxide, alumina, mica, , Glass fiber, fly ash, and whiskers. The method according to claim 1,
Wherein a white film facing the lower sheet is subjected to any one or two or more hydrophilization treatments selected from plasma treatment, UV-ozone treatment and corona discharge. The method according to claim 1,
Wherein at least one layer selected from the transparent sheet, the white film and the lower sheet further comprises any one or a mixture of two or more selected from the group consisting of a polypropylene elastomer, a polyethylene elastomer and a polystyrene elastomer. 14. The method of claim 13,
The polypropylene-based elastomer has a propylene content of 70 to 95% by weight, and the content of ethylene, 1-butene, 1-pentene, 1-hexene, Alpha-olefin copolymer elastomer having a content of one or more alpha-olefins selected from the group consisting of propylene-alpha-olefin copolymers having a content of 5 to 30% by weight,
Wherein the polyethylene-based elastomer has an ethylene content of 70 to 95% by weight, and the content of ethylene is at least one selected from the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, And an ethylene-alpha-olefin copolymer system elastomer having a content of one or more alpha-olefins selected from 5 to 30% by weight,
The polystyrene-based elastomer may be selected from the group consisting of styrene-butadiene block copolymer elastomer, hydrogenated styrene-butadiene elastomer, styrene-isoprene block copolymer elastomer, styrene-butadiene-styrene block copolymer elastomer, styrene-isoprene-styrene block copolymer elastomer, Butadiene-butylene-styrene block copolymer elastomer, styrene-ethylene-butylene-styrene block copolymer elastomer and styrene-ethylene-propylene-styrene block copolymer elastomer. The method of claim 3,
Wherein the reinforcing sheet further comprises any one or a mixture of two or more selected from a polypropylene elastomer, a polyethylene elastomer and a polystyrene elastomer. 16. The method of claim 15,
The polypropylene-based elastomer has a propylene content of 70 to 95% by weight, and the content of ethylene, 1-butene, 1-pentene, 1-hexene, Alpha-olefin copolymer elastomer having a content of one or more alpha-olefins selected from the group consisting of propylene-alpha-olefin copolymers having a content of 5 to 30% by weight,
Wherein the polyethylene-based elastomer has an ethylene content of 70 to 95% by weight, and the content of ethylene is at least one selected from the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, And an ethylene-alpha-olefin copolymer system elastomer having a content of one or more alpha-olefins selected from 5 to 30% by weight,
The polystyrene-based elastomer may be selected from the group consisting of styrene-butadiene block copolymer elastomer, hydrogenated styrene-butadiene elastomer, styrene-isoprene block copolymer elastomer, styrene-butadiene-styrene block copolymer elastomer, styrene-isoprene-styrene block copolymer elastomer, Butadiene-butylene-styrene block copolymer elastomer, styrene-ethylene-butylene-styrene block copolymer elastomer and styrene-ethylene-propylene-styrene block copolymer elastomer. The method according to claim 1,
Wherein the transparent sheet, the print layer, the white film, and the lower sheet are physically integrated by heat pressing. The method of claim 3,
Wherein the transparent sheet, the print layer, the white film, the reinforcing sheet and the lower sheet are physically integrated by heat pressing. 5. The method of claim 4,
Wherein the transparent sheet, the print layer, the white film, the lower sheet and the adhesive film are physically integrated by heat pressing. 6. The method of claim 5,
Wherein the transparent sheet, the print layer, the white film, the reinforcing sheet, the lower sheet and the adhesive film are physically integrated by heat pressing. a) applying an aqueous adhesive to the floor surface; And
b) adhering and bonding the lower sheet of the flooring material of claim 1 or 2 on the water-based adhesive so as to face each other;
Wherein the method comprises the steps of: a) applying an aqueous adhesive to the floor surface; And
b) adhering the lower sheet of the flooring material according to claim 3 facing the aqueous adhesive to face each other;
Wherein the method comprises the steps of: a) applying an aqueous adhesive to the floor surface; And
b) adhering the adhesive film of the floor material of claim 4 facing the aqueous adhesive to face each other;
Wherein the method comprises the steps of: a) applying an aqueous adhesive to the floor surface; And
b) adhering the adhesive film of the floor material of claim 5 facing the aqueous adhesive to face each other;
Wherein the method comprises the steps of:

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