KR20160045237A - Elastic floor sheet having elastic doubler - Google Patents

Abstract

The present invention relates to a non-toxic and eco-friendly elastic flooring material having an elastic doubler, capable of reducing noise and vibration delivered from the upper floor to the lower floor by layering a lower reinforcement material on a lower part of the cushion flooring material having an elastic PLA layer on its surface. According to the present invention, the elastic flooring material having the elastic PLA layer comprises: a cushion flooring material (100) layered with a cushion layer (105), a printing layer (1130), and the elastic PLA layer (117) in order from the bottom; and the lower reinforcement material (200) layered on the lower part of the cushion floor material (100). According to the present invention, the non-toxic and eco-friendly cushion flooring material has a PLA elastic layer as a surface layer constituting the cushion flooring material, so that a user is not exposed to harmful substances even when a surface treatment layer, disposed on the upper portion of the surface layer, is worn out and the surface layer is exposed. In addition, the present invention offers excellent shock absorption and sound insulation by layering the cushion layer as a lower reinforcement material for the cushion flooring material. In particular, the present invention provides a variety of functions, and has improved appearance. In addition, there is an advantage that noise can be prevented by giving cushioning to prevent noise between floors.

Description

{Elastic floor sheet having elastic doubler}

The present invention relates to a flooring for reducing noise between layers, and more particularly, to a flooring material for reducing noise, and more particularly, to a flooring material having an elastic PLA layer as a surface layer, The present invention relates to a flooring for noise reduction, which can sufficiently block the transmission of sound and vibration from a floor to a floor.

Recently, as the quality of life has improved, interest in health as well as environmentally friendly products has increased. For example, flooring materials, which are closely related to residential life, are gradually using materials that can provide environmentally friendly and sound insulation performance. In addition, regulations such as materials used for manufacturing such flooring materials are increasingly being tightened.

Conventionally, a PVC material is mainly used as a flooring material previously filed by the Japanese Patent Application Laid-Open No. 10-2004-0065494. Specifically, the conventional bottom layer is formed by laminating the back layer, the cushion layer, the dimension reinforcing layer, the printing layer, the transparent layer, and the surface treatment layer in this order from the bottom.

However, conventional flooring materials mainly contain toxic plasticizers such as phthalates as PVC materials are used, and release harmful substances such as environmental hormones and toxic gases (hydrogen chloride) when incinerated waste or fire occurs. At the time of landfill disposal, there is a problem that environmental burden is caused as it remains almost permanently in a natural environment.

Also, the surface layer is formed on the top surface of the bottom material to prevent scratches and contamination. However, the surface treatment layer is gradually worn away with time. In this case, the transparent layer formed on the lower layer is exposed to the outside, and when the transparent layer of PVC is directly in contact with the human body, there is a problem that harmful substances emitted are adversely affecting the human body.

On the other hand, the problem of interlayer noise in living spaces such as apartments is becoming a social issue, and related regulations (housing construction law, etc.) are also being gradually strengthened.

In this regard, the use of reinforced flooring is gradually decreasing due to the use quality problem, and the market for flooring made of PVC sheet is also stagnant, and there is growing interest in Kofudo products having high cushionability due to the interlayer noise problem.

Disclosure of the Invention The present invention has been conceived to solve the above-described problems, and it is an object of the present invention to provide a surface treatment layer composed of a composite resin containing polylactic acid (PLA), which is biodegradable and toxic plasticizer- It is possible to prevent the user from being exposed to harmful substances even when the surface layer is worn and exposed, and in particular, to provide a flooring for noise reduction in an interlayer so as to solve the interlayer noise problem by further laminating a lower stiffener at the bottom of the cushioning floor have.

To achieve the above object, the present invention provides a flooring for reducing noise in a floor comprising: a cushioning floor including a cushion layer, a printing layer, and an elastic PLA layer sequentially laminated from below; And a lower stiffener laminated on the lower portion of the cushioning bottom material.

In this case, the elastic PLA layer includes a composite resin having a mixing ratio of acrylic elastic resin and poly (lactic acid) of 100: 1 - 1: 100.

The acrylic elastic resin is characterized by being a copolymer of a polymer of an alkyl methacrylate monomer constituting a hard segment and a polymer of an alkyl acrylate monomer constituting a soft segment.

The copolymer is characterized in that the hard segment: soft segment has a blending ratio within a range of 20: 40 to 80: 60% by weight.

The hard segment has a glass transition temperature within a range of 80 to 120 ° C, and the soft segment has a glass transition temperature within a range of -60 to -20 ° C.

The alkyl methacrylate monomer constituting the hard segment may be at least one selected from the group consisting of methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, But are not limited to, methyl methacrylate, ethyl methacrylate, ethyl methacrylate, ethyl methacrylate, ethyl methacrylate, ethyl methacrylate, ethyl methacrylate, butyl methacrylate, And at least one kind selected from the group consisting of the following compounds:

The alkyl methacrylate monomer is preferably methyl methacrylate.

The alkyl acrylate monomer constituting the soft segment may be at least one selected from the group consisting of methyl acrylate, ethyl acrylate, n-propyl acrylate, i-propyl acrylate, n-butyl acrylate, Is at least one selected from the group consisting of hexyl acrylate, 2-ethylhexyl acrylate, heptyl acrylate, octyl acrylate, cyclopentyl acrylate, 3-vinyl cyclohexyl acrylate and cyclohexyl acrylate.

The alkyl acrylate monomer is preferably n-butyl acrylate.

Further, in the above-mentioned composite resin, Based on 100 parts by weight of the lubricant, 1 to 5 parts by weight of the lubricant.

In addition, the elastic PLA layer may further include a surface-treated layer laminated on the upper surface thereof.

Further, a transparent layer may be laminated between the print layer and the elastic PLA layer.

Further, a colored layer may be further laminated on the lower portion of the print layer.

Further, a stop layer for reinforcing the surface pressing strength may be further provided on the lower portion of the colored layer.

The printed layer may further include a layer having a dimensionally stable layer disposed thereunder.

Further, between the cushion layer and the dimensional stability layer, an interlayer may be further provided to improve adhesion.

The dimensionally stable layer is a glass fiber nonwoven fabric impregnated with a PVC sol.

Further, a balance layer may be further laminated on the lower portion of the cushion layer.

Further, an additional function layer may be further laminated on the lower part of the cushion layer.

The lower stiffener may be a resin foam or a rubber foam, and the resin foam may be any one of polyolefin, polystyrene, polyurethane, and polyvinyl chloride as a raw material resin.

The lower reinforcing member may further include a laminated body having an adhesive surface exposed in an L-shape at an edge of the cushioning bottom so that the bottom surface of the adjacent cushioning flooring can be disposed on the adhesive surface have.

The lower stiffener is laminated in such a manner that at least the first and second cushion layers are divided into upper and lower halves and the second cushion layer has an adhesive surface exposed in an L shape at the edge of the first cushion layer, And the bottom surface of one cushion layer may be disposed on the adhesive surface.

Further, the lower reinforcement may further include a shock-absorbing concavoconvex formed on the bottom surface of the lower reinforcement.

The present invention according to the above-described construction is a non-toxic, eco-friendly cushion which prevents the surface layer located above the surface layer from being exposed to a harmful substance even if the surface layer is exposed by applying an elastic PLA layer as a surface layer constituting the cushioning bottom material Flooring can be provided.

In addition, since the lower stiffener is laminated on the lower part of the cushioning flooring, there is an effect of providing a flooring material capable of maximizing a buffering effect and a sound insulation effect. Especially, it is aesthetically pleasing and provides various functions, particularly sound insulation and cushioning, There is an advantage of improving the noise of life weight as well as the impact sound.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a flooring for reducing interlayer noise according to the present invention;
FIG. 2 is a view showing a specific laminated structure of the flooring according to the present invention,
Figures 3-9 show another embodiment showing various laminated structures of a flooring according to the present invention,
FIG. 10 is a view illustrating an embodiment of a floor material formed in the form of a tile having an adhesive surface for smooth construction of the floor material according to the present invention,
Fig. 11 is a state diagram showing the construction state of Fig. 10,
12 is a view showing another embodiment of a floor material formed in the form of a tile having an adhesive surface for smooth construction of the floor material according to the present invention,
13 is a state in which the shock absorber for impact buffering is formed on the bottom surface of the lower stiffener according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals as in the drawings denote the same elements in the drawings, unless they are indicated on other drawings.

FIG. 1 is a view illustrating the structure of a floor material for reducing interlayer noise according to the present invention, and FIG. 2 is an embodiment showing a specific laminated structure of a floor material according to the present invention.

1 and 2, a floor material 1 for reducing interlayer noise according to a preferred embodiment of the present invention includes a cushion layer 105, a printed layer 113, and an elastic PLA layer 117 sequentially And a lower stiffener 200 stacked on the lower portion of the cushioning floor 100. The upper and lower stiffeners 200,

The configuration of the present invention will be described in detail as follows.

First, the laminated structure constituting the cushioning bottom 100 will be described.

The cushion layer 105 serves as a bottom structure of the cushioning bottoms 100 and serves to absorb shocks. The cushion layer 105 may be made of a foamable synthetic resin so as to give a certain volume feeling and cushion as the cushioning floor material 100. Specifically, the cushion layer 105 may be formed of any one of polyethylene, polyvinyl chloride, pre-crosslinked acrylonitrile butadiene-vinyl chloride copolymer resin, modified olefin resin, ethylene vinyl acetate resin (EVA) or thermoplastic urethane resin And optionally a plurality.

Preferably, the composition of the cushion layer 105 is 1 to 300 parts by weight of a preliminarily crosslinked acrylonitrile-butadiene-vinyl chloride copolymer resin, 100 parts by weight of a modified olefin (meth) acrylate based on 100 parts by weight of polyvinyl chloride having a degree of polymerization of 1000 to 1700, 0.1 to 200 parts by weight of a resin, 5 to 100 parts by weight of an ethylene vinyl acetate resin (EVA) or a thermoplastic urethane resin (TPU), 30 to 85 parts by weight of a plasticizer, 1 to 5 parts by weight of a foam stabilizer and 2 to 6 parts by weight of a foaming agent . This cushion layer 105 can be obtained by heat-treating through a foaming oven.

The printed layer 113 constitutes an upper structure of the cushioning floor material 100 in addition to the elastic PLA layer 117 which will be described later. The printed layer 113 serves to impart various printing patterns to the cushioning floor material 100 do.

The print layer 113 may be formed by transfer printing, gravure printing, or screen printing on a layer to be printed, preferably by transfer printing. Alternatively, a film or paper on which a printed pattern is formed may be formed by laminating. Such a print layer imparts a pattern through printing, so that an appearance and a design effect excellent in aesthetic sense can be obtained.

The elastic PLA layer 117 is made of a biodegradable and eco-friendly resin that does not contain a harmful plasticizer to improve the physical properties of the cushioning bottom material 100 and to provide sound insulation and cushioning. It protects. Particularly, the elastic PLA layer 117 has the effect of minimizing the release of harmful substances even when the surface treatment layer formed thereon is worn and the elastic PLA layer 117 is exposed.

The elastic PLA layer 117 can be manufactured using calender molding, casting molding, blow molding, extrusion molding or the like. Calender molding is a molding method in which a sheet or a film is continuously produced by rolling a raw material between two or more rolls rotating in mutually opposite directions. Casting molding is a molding method in which a synthetic resin sol is coated in multiple layers on a release paper having excellent heat resistance, which is easy to peel off, and then laminated. Blow molding is a process in which a thermoplastic resin is heated and melted and extruded continuously from the extruder into a tube, and then the mold is closed by inserting it into one or two or more molds, sealing the top and bottom of the mold, and then blowing air into the hand, Is a molding method for making a hollow container product by closely adhering to the inner wall of the mold. The extrusion molding is a molding method in which a thermoplastic plastic material is heated and melted on the surface of a base material by an extruder to be in a fluidized state, and then extruded from a T die into a film and simultaneously pressed.

Preferably, in the case of calender molding, the content of additives such as additives can be freely controlled as compared with other production methods, and thus a flooring material having excellent flexibility, impact resistance, mechanical strength, workability, . In addition, it is possible to further reduce the raw material cost, and therefore, it is preferable to produce the product by the calender molding method.

The elastic PLA layer 117 may be preferably transparent. The transparent elastic PLA layer 117 may be formed of a polylactic acid (PLA) constituting the composite resin and a resin capable of being processed into a transparent state . ≪ / RTI > That is, it is based on the fact that a transparent composite resin can be obtained even when they are mixed, and by using the transparent elastic PLA layer 117, it is possible to provide an aesthetically pleasing floor material through the printed layer 113 positioned below .

For reference, when the elastic PLA layer 117 is formed of only poly (lactic acid), the following disadvantages may occur.

First, the poly (lactic acid) is poor in dimensional stability, so that deformation such as shrinkage and warping may occur severely, and the physical properties of the floor material containing the poly (lactic acid) may become inadequate.

Secondly, poly (lactic acid) is easily blocked under high temperature conditions such as during the summer season, so that the films do not stick to each other when they are wound, and therefore, productivity can be lowered in producing floor materials by using them.

Third, the poly (lactic acid) has a narrow processing temperature range (130 to 150 ° C) and has low processability. Therefore, productivity can be lowered when the floor material is produced using the poly (lactic acid).

Fourth, polylactic acid is difficult to apply to flooring materials with a narrow temperature range (20 to 35 ° C), and tends to be excessively hardened when the temperature is out of the above range, that is, below 20 ° C. In particular, it can be easily broken in the winter season, and when it is above 35 캜, it tends to lose its elasticity and become excessively softened, so that the physical properties required as a bottom material rapidly deteriorate and the function as a bottom material can be lost.

Therefore, the elastic PLA layer 117 used in the present invention preferably has a mixing ratio (weight ratio) of the acrylic elastic resin and the poly (lactic acid) of 100: 1 to 1: 100, preferably 95: 5 to 30:70, 10 to 40: 60 to obtain an elastic PLA layer 117, which is particularly useful for the production of flooring.

When the content of the acrylic elastic resin is less than the above range, there is a problem in that the above-mentioned polylactic acid is used as a bottom material, that is, a problem of low dimensional stability, high temperature blocking, a narrow processing temperature range, It is not preferable because it may not be sufficient to solve.

The acrylic elastic resin constituting the elastic PLA layer 117 may be a copolymer of a polymer of an alkyl methacrylate monomer constituting a hard segment and a polymer of an alkyl acrylate monomer constituting a soft segment. Here, the copolymer may be a core-shell structure copolymer or a block copolymer.

The copolymer of the core-shell structure has a structure in which a soft segment is used as a core and a hard segment is used as a shell for enclosing the core.

As a method of producing the copolymer of the core shell structure, a core including a soft segment is manufactured, and then a shell including a hard segment and surrounding the core is manufactured. The core and the shell may be prepared by emulsion polymerization or suspension, but it is preferable to use suspension polymerization which facilitates separation and processing of the polymer.

The block copolymer is preferably composed of a soft segment and a hard segment, and preferably a triblock copolymer in which a hard segment is bonded to both ends of the soft segment, because it can improve low temperature impact resistance, heat resistance and the like. As a method of producing the block copolymer, a method of living polymerization of monomers constituting each block is used. Such living polymerization can be carried out, for example, by a method in which an organic alkali metal compound is used as a polymerization initiator and anionic polymerization is carried out in the presence of a mineral acid such as a salt of an alkali metal or an alkaline earth metal, a method in which an organic alkali metal compound is used as a polymerization initiator, , A method of polymerizing an organic rare earth metal complex as a polymerization initiator, a method of radical polymerization using an? -Halogenated ester compound as an initiator in the presence of a copper compound, and the like. Alternatively, a method of polymerizing the monomers constituting each block by using a polyvalent radical polymerization initiator or a polyvalent radical chain transfer agent to prepare a mixture containing the block copolymer, and the like. It is preferable that the block copolymer does not contain an oligomer which can be obtained in a high purity and has a narrow molecular weight distribution, that is, a low molecular weight substance which is a factor for lowering impact resistance and heat resistance or a factor for lowering fluidity, A method in which an organic alkali metal compound is used as a polymerization initiator and an anionic polymerization is carried out in the presence of an organoaluminum compound is preferred. Representative examples of the organoaluminum compound include isobutylbis (2,6-di-t-butyl-4-methylphenoxy) aluminum, isobutylbis (2,6- Bis (2,6-di-t-butyl-4-methylphenoxy) aluminum, n-octylbis Octylbis [2,2'-methylenebis (4-methyl-6-t-butylphenoxy)] aluminum, tris (2,6-di- Di-t-butyl-4-methylphenoxy) aluminum, tris (2,6-diphenylphenoxy) aluminum and the like. Among these, isobutyl bis (2,6-di-t-butyl-4-methylphenoxy) aluminum, isobutyl bis (2,4- Di-t-butyl-4-methylphenoxy) aluminum or n-octylbis (2,4-di-t-butylphenoxy) aluminum is particularly preferable in view of polymerization activity, block efficiency and the like.

Here, the copolymer may have a mixing ratio within the range of 20 to 40: 80 to 60% by weight, preferably 25 to 35: 75 to 65% by weight of the hard segment: soft segment. Therefore, it is possible to impart mechanical properties, particularly abrasion resistance, suitable for use as a raw material for a floor material, while imparting elasticity to the elastic PLA layer 117.

In this case, the hard segment preferably has a glass transition temperature in the range of 80 to 120 ° C, and the soft segment preferably has a glass transition temperature in the range of -60 to -20 ° C.

Examples of the alkyl methacrylate monomer constituting the hard segment include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, Acrylates such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, butyl methacrylate, hexyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, , And preferably at least one selected from the group consisting of methyl methacrylate.

The alkyl acrylate monomers constituting the soft segment may be selected from the group consisting of methyl acrylate, ethyl acrylate, n-propyl acrylate, i-propyl acrylate, n-butyl acrylate, t-butyl acrylate, pentyl acrylate, hexyl Acrylate, 2-ethylhexyl acrylate, heptyl acrylate, octyl acrylate, cyclopentyl acrylate, 3-vinyl cyclohexyl acrylate, and cyclohexyl acrylate, and preferably at least one selected from the group consisting of n-butyl acrylate.

The acrylic elastic resin does not contain low molecular weight substances such as residual monomers and oligomers, and does not contain a plasticizer. Also, it has a low melt viscosity, high fluidity, low viscosity of solution, low emission of volatile organic compounds, and excellent weatherability. In addition, compatibility with the polar resin and adhesiveness are good, and when the synthetic resin layer such as PVC is selectively placed in the lower part, the adhesive strength is excellent.

The cushioning flooring material of the present invention has an elasticity, flexibility, and sound insulation and provides a soft touch feeling by using the acrylic elastic resin as the elastic PLA layer 117.

On the other hand, the composite resin may further include 1 to 5 parts by weight of a lubricant based on 100 parts by weight of the poly (lactic acid). Such lubricants may be commercialized higher fatty acids known to be useful in the manufacture of flooring.

The lower stiffener 200 is stacked on the lower part of the cushioning floor material 100 to block the transmission of sound and vibration from the upper layer to the lower layer as much as possible, thereby reducing interlayer noise. The lower stiffener 200 may be a foam, preferably a resin foam or a rubber foam. In this case, the term 'foaming agent' means a resin or rubber raw material mixed with a foaming agent and foamed and cured to form a plurality of micropores therein. In the case of the resin foam, polyolefin, polystyrene, polyurethane, polyvinyl chloride and the like are mainly used as the raw resin, but the present invention is not limited thereto. The rubber foam may also be understood to be the same as the resin foam, and it can be understood that the rubber foam is used instead of the resin as the raw material, which means that a large number of micropores are formed inside the foam by foaming.

These foams are generally excellent in physical properties such as heat insulation, absorbency, light weight and buffering property, and can be formed into a cylindrical shape or a plate shape. The lower stiffener 200 according to the present invention may be formed into a plate-like shape similar to that of the cushioning bottom material 100. In particular, the same size as that of the plate-like cushioning flooring 100, and is laminated on the bottom of the cushioning flooring 100. There is no limitation on the standard or shape, but it may have a normal tile shape for convenience of construction.

Preferably, the lower stiffener 200 may be formed to a thickness of 7 to 30 mm, thereby improving the light weight impact sound improvement (more than? 20 dB) and the life weight noise.

The flooring 1 according to the present invention may have various laminated structures, and various laminated structures of the cushioning flooring 100 will be described with reference to FIGS. 3 to 9. FIG. .

3, the cushioning flooring 100 according to the present invention basically includes a cushioning layer 105, a printing layer 113 and an elastic PLA layer 117 which are essential components, and the balance layer 103 ), The cushion layer 105, the interlayer film 107, the dimensionally stable layer 109, the printed layer 113, the transparent layer 115, the elastic PLA layer 117 and the surface treatment layer 119 are sequentially stacked Structure. In this case, since the cushion layer 105, the print layer 113, and the elastic PLA layer 117 are the same as those described above, the following explanation will be avoided altogether.

The balance layer 103 is stacked on the lower portion of the cushion layer 105 to provide a curling balance of the upper and lower portions of the cushioning floor 100. The balance layer 103 may be configured to include a polyvinyl chloride and a filler (i.e., calcium carbonate) having the same composition as that of the cushion layer 105. Therefore, the present invention is not particularly limited.

The interlayer film 107 intervenes between the dimensionally stable layer 109 and the cushion layer 105 to improve adhesion. The interleaving layer 107 may be configured to include polyvinyl chloride and a filler (i.e., calcium carbonate) of the same composition as the cushion layer 105, except that it is not foamed.

The dimension-stabilizing layer 109 reinforces the dimensional stability of the cushioning bottom material 100 and can be fixed within the cushioning bottoms 100 by the intermediate layer 107. And more preferably between the cushion layer 105 and the print layer 113 via the interlayer film 107. [ The dimensionally stable layer 109 may be made of a glass fiber impregnated with a PVC sol, preferably a glass fiber nonwoven fabric. In this case, the impregnation with the PVC sol can be understood as fixing the glass fiber and facilitating the lamination of the dimension-stabilizing layer 109 with the cushion layer 105. Preferably, the PVC sol comprises 100 parts by weight of polyvinyl chloride having a polymerization degree of 1200 to 1700, 50 to 100 parts by weight of dioctylterephthalate (DOTP) or dioctylphthalate (DOP) as a plasticizer, 1 to 3 parts by weight of soybean oil, 2 to 6 parts by weight of barium-zinc heat stabilizer, 10 to 80 parts by weight of calcium carbonate, and 5 to 50 parts by weight of titanium dioxide which is a white pigment.

The transparent layer 115, preferably the transparent layer 115, is applied together with the elastic PLA layer 117 to reduce the thickness of the elastic PLA layer 117. This reduces the amount of the elastic PLA used, which is relatively expensive compared to PVC or PET, which is the material of the transparent layer 115, thereby reducing the material cost, whereby the entire transparent layer formed on the cushion layer is made of the elastic PLA layer The manufacturing cost can be lowered, and the same or similar effect can be obtained in terms of function and appearance.

In this case, the transparent layer 115 may be formed of polyvinyl chloride (PVC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene such as polyethylene, PE, polymethyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), polycarbonate (PC), styrene-acrylonitrile Styrene-acrylonitrile copolymer (SAN). It is preferable to use a transparent polyvinyl chloride or transparent polyethylene terephthalate film having excellent transparency.

The surface treatment layer 119 can be laminated on the elastic PLA layer 117. The surface treatment layer 119 prevents an initial contamination prevention function, that is, contaminants from adhering to the surface of the cushioning floor material 100, and provides scratch resistance and abrasion resistance . The surface treatment layer 119 can be generally formed by coating a coating solution in which a thermosetting or photo-curing compound is dissolved in a solvent. However, in the case of the thermosetting compound, when the heat is applied to form the surface treatment layer 119, the physical properties of the other layers located below the heat treatment layer, in particular, the elastic PLA layer 117 can be changed by heat, Is more preferable. The curable compound may be a monomer or oligomer having at least one functional group such as an unsaturated bond group capable of performing a crosslinking reaction. Examples of the curable compound include urethane acrylate, epoxy acrylate, polyether acrylate, polyester acrylate Dipentaerythritol pentaacrylate, dipentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, and the like can be used. However, they are exemplified by And the present invention is not intended to be limited thereto.

In the present invention, these can be used singly or as a mixture of two or more kinds of them as a photo-curable compound. The coating liquid containing the photo-curing compound generally contains a photopolymerization initiator in addition to a photo-curable compound and a solvent. If necessary, various additives may be added to the coating solution in such a range as not to change the physical properties of the hard coat layer .

The surface treatment layer 119 has a surface hardness of 7H or more as measured by pencil hardness, and may be a surface hardness of the surface of the plastic film which is excellent, more preferably in a range of 7H to 8H. The photocurable compound constituting the surface treatment layer 119 may be a conventional photocurable urethane acrylate.

Preferably, the flooring material having the layer structure has a balance layer 103 of 0.1 to 0.2 mm, a cushion layer 105 of 0.3 to 3.0 mm (thickness before foaming), a separable layer 107 of 0.05 to 0.60 mm, The thickness of the dimensionally stable layer 109 is in the range of 0.32 to 0.38 mm, the thickness of the transparent layer 115 is 0.1 to 0.7 mm, the thickness of the elastic PLA layer 117 is 0.1 to 0.2 mm and the surface treatment layer 119 is in the range of 20 to 40 占 퐉 And the flooring consisting of these layers can be adjusted to have a total thickness of about 4.5 mm.

The printing layer 113 is formed by printing and is thin enough to be difficult to measure its thickness. The thickness of the printing layer 113 is so thin that it does not affect the total thickness of the flooring obtained according to the present invention, Can be ignored. Further, in the above configuration, the balance layer 103 and the transparent layer 115 may be omitted. However, if the transparent layer 115 is omitted, the elastic PLA layer 117 may be thicker. In this case, the thickness of the elastic PLA layer 117 may be within a range of 0.2 to 1.0 mm.

4, the cushioning floor material 100 according to another embodiment includes, in addition to the cushion layer 105, the print layer 113, and the elastic PLA layer 117 as essential essential components described above, The adhesive layer 101, the cushion layer 105, the interlayer film 107, the dimensionally stable layer 109, the printed layer 113, the transparent layer 115, the elastic PLA layer 117, (119) may be sequentially stacked. That is, the additional layer 101 is used in place of the balance layer 103 of FIG. 3, and thus all the repetitive explanations are avoided.

The additional functional layer 101 is preferably laminated on the lower side of the cushion layer 105. The woven, knitted or non-woven fabric may be a natural woven fabric, a synthetic woven fabric, a woven fabric woven with mixed fibers of these fibers, a knitted fabric, or a needle punched Or a nonwoven fabric produced by a known processing method such as the above. The appearance of the above-mentioned floor material, in particular, the appearance of the back surface (bottom surface) of the floor material is enhanced to enhance the quality of the product and increase the market value, and at the same time, Function.

The bottom layer having such a layer structure preferably has a thickness of 0.1 to 0.2 mm for the additional functional layer 101, 0.3 to 3.0 mm (thickness before foaming) for the cushion layer 105, 0.05 to 0.60 mm for the interlayer film 107, The thickness of the dimensionally stable layer 109 is in the range of 0.32 to 0.38 mm, the thickness of the transparent layer 115 is 0.1 to 0.7 mm, the thickness of the elastic PLA layer 117 is 0.1 to 0.2 mm and the surface treatment layer 119 is in the range of 20 to 40 占 퐉 Lt; / RTI > In addition, in the above configuration, the additional function layer 101 and the transparent layer 115 may be omitted. In this case, the thickness of the elastic PLA layer 117 may be within a range of 0.2 to 1.0 mm.

5, in addition to the cushion layer 105, the print layer 113, and the elastic PLA layer 117, the cushioning floor material 100 according to another embodiment has an essential basic structure as described above, The layer 103, the cushion layer 105, the dimensionally stable layer 109, the colored layer 111, the printed layer 113, the transparent layer 115, the elastic PLA layer 117 and the surface treatment layer 119 are sequentially As shown in FIG.

The colored layer 111 serves to assist the print layer 113 to form a background color that becomes the background of the pattern formed on the print layer 113. The colored layer 111 can be made the same or similar to the print layer 113 and includes polyvinyl chloride and a filler (i.e., calcium carbonate) of the same composition as the cushion layer 105 except that it is not foamed .

The cushioning floor material 100 having such a laminated structure preferably has a balance layer 103 of 0.1 to 0.2 mm, a cushion layer 105 of 0.3 to 3.0 mm (thickness before foaming) 0.1 to 0.2 mm for the colored layer 111, 0.1 to 0.7 mm for the transparent layer 115, 0.1 to 0.2 mm for the elastic PLA layer 117 and 20 to 40 占 퐉 for the surface treatment layer 119 . ≪ / RTI > In addition, the balance layer 103, the transparent layer 115, and the surface treatment layer 119 may be omitted in the above configuration. However, if the transparent layer 115 is omitted, the elastic PLA layer 117 may be thicker. In this case, the thickness of the elastic PLA layer 117 may be within a range of 0.2 to 1.0 mm.

6, in addition to the cushion layer 105, the print layer 113, and the elastic PLA layer 117, the cushioning floor material 100 according to another embodiment has the following essential components: A structure in which the functional layer 101, the cushion layer 105, the dimensionally stabilizing layer 109, the printing layer 113, the transparent layer 115, the elastic PLA layer 117 and the surface treatment layer 119 are sequentially stacked Lt; / RTI >

The cushioning floor material 100 having such a laminated structure preferably has a thickness of 0.1 to 0.2 mm for the additional functional layer 101, 0.3 to 3.0 mm (thickness before foaming) of the cushion layer 105, The thickness of the transparent layer 115 is 0.1 to 0.7 mm, the thickness of the elastic PLA layer 117 is 0.1 to 0.2 mm and the surface treatment layer 119 has a thickness of 20 to 40 占 퐉. In this case, the additional functional layer 101 and the transparent layer 115 may be omitted. However, if the transparent layer 115 is omitted, the elastic PLA layer 117 may be thicker. In this case, the thickness of the elastic PLA layer 117 may be within a range of 0.2 to 1.0 mm.

7, the balance layer 103, the cushion layer 105, the interlayer film 107, the dimensionally stabilizing layer 109, the stop layer 110, the colored layer 111, The reflective layer 113, the transparent layer 115, the elastic PLA layer 117, and the surface treatment layer 119. In this case, the stop layer 110 serves to reinforce the surface pressing strength of the cushioning floor material 100.

The balance layer 103, the cushion layer 105, the interlayer film 107, the dimensionally stable layer 109, the colored layer 111, the printing layer 103, Layer 113, the transparent layer 115, the elastic PLA layer 117, and the surface treatment layer 119, as shown in FIG.

Alternatively, as shown in FIG. 9, the elastic PLA layer 117 of FIG. 8 may be replaced with an acrylic elastic layer 116. The acrylic elastic layer 116 may be made of the same and / or similar resin as the acrylic elastic resin used in the production of the composite resin contained in the elastic PLA layer 117.

FIG. 10 is an embodiment of a floor material formed in the form of a tile having an adhesive surface for smooth construction of the floor material 1 according to the present invention, and FIG. 11 is a state diagram showing the construction of FIG.

10 and 11, the flooring 1 according to the present invention is manufactured in such a structure that a separate adhesive surface A is provided so that a plurality of the flooring 1 can be laid one after another, Thereby facilitating easy construction. That is, when the flooring material is applied, it is possible to omit the complicated adhesive application process, so that the flooring material can be easily installed and easily removed when necessary, thereby improving the convenience of installation.

The bottom material 1 according to an embodiment of the present invention is stacked such that the lower stiffener 200 has an adhesive surface A exposed in an L shape at the edge of the cushioning bottom 100, The bottom surface of the cushioning floor 100 may be disposed on the adhesive surface A. Preferably, the bottom material 1 may be formed in a square or rectangular shape having a width and a length of about 1 to 2 m.

12, the lower stiffener 200 is divided into upper and lower halves by at least first and second cushion layers 210 and 220, and the second cushion layer 220 is divided into upper and lower halves, (A) exposed at the edge of the first cushion layer 210, and the bottom surface of the first cushion layer 210 of another neighboring floor material is disposed on the adhesive surface A .

13, the shock absorber 230 may be further provided on the bottom surface of the lower stiffener 200 so as to improve the shock absorbing performance of the floor material 1. As shown in FIG.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such changes and modifications are intended to be within the scope of the appended claims.

[Example]

Example 1

3, the balance layer 103, the cushion layer 105, the interlayer film 107, the dimensionally stable layer 109, the printed layer 113, the transparent layer 115, the elastic PLA layer 117 ) And a surface treatment layer (119) are sequentially laminated, wherein the elastic PLA layer (117) comprises 30 parts by weight of an acrylic elastic resin based on 100 parts by weight of polylactic acid, and 30 parts by weight of a higher fatty acid 1 part by weight were mixed to prepare a flooring according to the present invention having a thickness of 0.1 mm.

A lower stiffener 200 formed of a polyurethane material having a thickness of 10 mm is laminated on the bottom of the cushioning bottoms 100. [

Example 2

The same procedure as in Example 1 was carried out except that the transparent layer 115 was not used in Example 1 and that the elastic PLA layer 117 was formed to have a thickness of 0.8 mm.

Comparative Example 1

In the same manner as the first embodiment except that the transparent layer 115 and the elastic PLA layer 117 are formed to have a thickness corresponding to the sum of the thicknesses of the two layers instead of the transparent layer 115 in the first embodiment To obtain a bottom material.

Experimental Example 1

The TVOC (total volatile organic compound) emission amount of Comparative Example 1 in which the transparent layer 115 that is commercialized with the bottom material of Example 1 constitutes the surface layer was compared and the results are shown in Table 1 below.

The method of measuring the TVOC emission amount was carried out by the small chamber method of the indoor air quality process test standard of the Ministry of the Environment Notice No. 2010-24, and it was confirmed that the sample of the floor material as the test material in the small chamber connected to the mass spectrometer / high performance liquid chromatography (MS / And the TVOC was measured by measuring the TVOC in the incoming air by allowing the emitted TVOC to be collected by the small chamber and directly introduced into the mass spectrometer / high performance liquid chromatography. As the other test conditions, (About 25 ° C), and the specimens of Examples and Comparative Examples were tested at the same temperature for the same period of time so as to be able to objectively compare TVOC emissions under the same conditions.

division TVOC (mg / m < 2 > h) How to measure Comparative Example 1 0.246 Indoor air quality process test standard Small chamber method Example 1 0.079 Example 2 0.062

As shown in Table 1, it can be seen that the total amount of the volatile organic compounds emitted from the flooring according to the present invention is reduced as compared with the flooring according to Comparative Example 1.

Experimental Example 2

Test data comparing the sound insulation performance of Example 1 and Comparative Example 1 are shown in Table 2 below. The sound insulation performance test was carried out according to KS F 2810-2 (heavy impact sound test conditions). In the control group, the bottom of the control group in which the bottom material was not provided was used. In Comparative Example 1, the bottom material of Comparative Example 1 was placed on the bottom of the control group. In Example 1, Was installed.

division Sound insulation performance (dB) How to measure Measures Attenuation Control group 55 - KS F2810-2
(Floor impact sound isolation performance measurement method - standard weight impact method) Comparative Example 1 53 △ 2 Example 1 53 △ 2 Example 2 53 △ 2

As shown in Table 2, it can be confirmed that the flooring material 1 according to the present invention has improved weight-absorbing sound insulation performance as compared with the control.

1: flooring for floor noise reduction 100: flooring for cushioning
101: additional function layer 103: balance layer
105: cushion layer 107:
109: dimensional stability layer 110: stop layer
111: colored layer 113: printed layer
115: transparent layer 116: acrylic elastic layer
117: elastic PLA layer 119: surface treated layer
200: lower stiffener 210: first cushion layer
220: second cushion layer 230: concave and convex
A: Adhesive surface

Claims (23)

A cushioning floor material (100) comprising a cushion layer (105), a printed layer (113), and an elastic PLA layer (117) laminated successively from below; And
And a lower stiffener (200) stacked on the lower portion of the cushioning floor material (100).
The method according to claim 1,
The elastic PLA layer (117)
An interlayer noise reducing flooring comprising a composite resin having a mixing ratio of an acrylic elastic resin and a polylactic acid of 100: 1 - 1: 100.
3. The method of claim 2,
The acrylic-based elastic resin may be,
Characterized in that it is a copolymer of a polymer of an alkyl methacrylate monomer constituting a hard segment and a polymer of an alkyl acrylate monomer constituting a soft segment.
The method of claim 3,
The copolymer may be a copolymer,
Hard segment: The soft segment has a mixing ratio within a range of 20: 40 to 80: 60% by weight.
The method of claim 3,
Wherein the hard segment has a glass transition temperature in the range of 80 to 120 占 폚 and the soft segment has a glass transition temperature in the range of -60 to -20 占 폚.
The method of claim 3,
The alkyl methacrylate monomer constituting the hard segment may include,
Methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, pentyl methacrylate, hexyl methacrylate, 2- Is at least one selected from the group consisting of ethylhexyl methacrylate, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, and cyclohexyl methacrylate. Noise reduction flooring.
The method according to claim 6,
The alkyl methacrylate monomer may be, for example,
Methyl methacrylate. ≪ / RTI >
The method of claim 3,
The alkyl acrylate monomers constituting the soft segment may include,
Acrylate, n-propyl acrylate, n-butyl acrylate, t-butyl acrylate, pentyl acrylate, hexyl acrylate, , Octyl acrylate, cyclopentyl acrylate, 3-vinylcyclohexyl acrylate, cyclohexyl acrylate, and mixtures thereof.
9. The method of claim 8,
The alkyl acrylate monomers may be,
n-butyl acrylate.
3. The method of claim 2,
In the composite resin,
The polylactic acid And 1 to 5 parts by weight of a lubricant based on 100 parts by weight of the lubricant.
The method according to claim 1,
On the upper side of the elastic PLA layer 117,
And a surface treatment layer (119).
The method according to claim 1,
Between the print layer 113 and the elastic PLA layer 117,
And a transparent layer (115).
The method according to claim 1,
In the lower portion of the print layer 113,
And a colored layer (111) laminated on one another.
14. The method of claim 13,
In the lower portion of the colored layer 111,
And a stop layer (110) for reinforcing the surface pressing strength.
The method according to claim 1,
In the lower portion of the print layer 113,
And a dimensionally stable layer (109).
16. The method of claim 15,
Between the cushion layer 105 and the dimension-stabilizing layer 109,
And an interlayer (107) for improving adhesion.
16. The method of claim 15,
The dimension-stabilizing layer (109)
A flooring for reducing interlayer noise, characterized in that it is a glass fiber nonwoven fabric impregnated with PVC sol.
The method according to claim 1,
In the lower portion of the cushion layer 105,
And a balance layer (103) laminated on one another.
The method according to claim 1,
In the lower portion of the cushion layer 105,
And an additional functional layer (101).
The method according to claim 1,
The lower stiffener (200)
Resin foam or rubber foam,
Wherein the resin foam is one of polyolefin, polystyrene, polyurethane, and polyvinyl chloride as a raw material resin.
The method according to claim 1,
The lower stiffener (200)
And has an adhesive surface (A) exposed at an edge of the cushioned floor material (100) in an L shape,
Further comprising a bottom surface of the other cushioning floor material (100) adjacent to the cushioning floor (100) so that the bottom surface can be disposed on the cementing surface (A).
The method according to claim 1,
The lower stiffener (200)
The first cushion layer 210 and the second cushion layer 210 are divided into upper and lower halves by at least the first and second cushion layers 210 and 220 so that the second cushion layer 220 has an adhesive surface A exposed in the L- Stacked,
Further comprising a bottom surface of the first cushion layer (210) of another neighboring floor material being arranged on the adhesive surface (A).
The method according to claim 1,
On the bottom surface of the lower stiffener 200,
The flooring for reducing interlayer noise further comprising a shock buffering concavo-convex (230).

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