JP6338225B2 - Cushion flooring and manufacturing method thereof - Google Patents

Description

  The present invention relates to a cushion flooring and a method for manufacturing the same, and more particularly, an elastic layer containing an acrylic elastic resin or a composite resin containing an acrylic elastic resin and polylactic acid is applied as a surface layer constituting the cushion flooring. Even if the surface treatment layer disposed on the surface layer is worn and the surface layer is exposed, it is non-toxic so that the user is not exposed to harmful substances, is environmentally friendly, And it is related with the cushion flooring excellent in the sound-insulation performance, and its manufacturing method.

  Recent improvements in quality of life (QOL) are remarkable, and as a result, interest in health-friendly and environmentally friendly products is increasing. For example, floor materials that are closely related to homes tend to use materials that are gradually more environmentally friendly and that provide sound insulation performance. In addition, the present situation is that regulations such as materials used to manufacture this kind of flooring are also gradually strengthened.

  Polyvinyl chloride (PVC) material is widely used for the flooring material according to the conventional technique described in Patent Document 1. Specifically, the conventional flooring is laminated | stacked in order of the balance layer, the cushion layer, the dimension stabilization layer, the printing layer, the transparent polyvinyl chloride (PVC) layer, and the surface treatment layer from the bottom.

  However, the conventional flooring mainly uses a polyvinyl chloride (PVC) material, so it contains a toxic phthalate plasticizer, and does not contain harmful substances such as environmental hormones and toxic gases (hydrogen chloride) at the time of incineration or fire. There is a problem in that when it is released and buried, it remains permanently in the natural environment, increasing the burden on the environment.

  Further, since the flooring has a surface treatment layer formed on the upper surface, scratching and contamination are prevented, but the surface treatment layer may be gradually worn out over time, and in this case If the transparent polyvinyl chloride (PVC) layer laminated underneath is exposed to the outside, and such a transparent polyvinyl chloride (PVC) layer made of polyvinyl chloride (PVC) directly hits the human body, There are problems such as harmful substances released from vinyl (PVC) material adversely affecting the human body.

  Furthermore, the current situation is that the problem of inter-layer noise in apartment buildings has been taken up as a social problem, and accordingly, development of a flooring that suppresses inter-layer noise as much as possible is eagerly desired.

Korean Published Patent Publication No. 10-2004-0065494

  The present invention has been devised to solve the above-described problems, and includes an acrylic elastic resin or a composite resin containing an acrylic elastic resin and polylactic acid (PLA) as a surface layer constituting a cushion flooring. Non-toxic, because the elastic layer is applied, so that even if the surface treatment layer disposed on the surface layer is worn and the surface layer is exposed, the user is not exposed to harmful substances It is an object of the present invention to provide a cushion floor material that is environmentally friendly and excellent in sound insulation performance, and a method for manufacturing the same.

  The present invention made to solve the above problems comprises a cushion layer, a printing layer, and an elastic layer in this order from the bottom to the top, wherein the elastic layer includes an acrylic elastic resin. Provide cushion flooring.

  In addition, the present invention includes a cushion layer, a dimension stabilizing layer, a printing layer, and an elastic layer in this order from the lower part to the upper part. The elastic layer includes a composite resin containing an acrylic elastic resin and polylactic acid. A cushion flooring is provided.

  Furthermore, the present invention includes a cushion layer, a dimension stabilizing layer, a printing layer, and an elastic layer in this order from the lower part to the upper part, and the elastic layer includes an acrylic elastic resin. Provide flooring.

  Furthermore, the present invention includes a cushion layer, a dimension stabilizing layer, a printing layer, and an elastic layer in this order from the lower part to the upper part. The elastic layer is a composite resin containing an acrylic elastic resin and polylactic acid. A cushion flooring characterized by comprising:

  Further, the present invention provides a cushion floor material comprising a cushion layer, a printed layer and an elastic layer in this order from the bottom to the top, in the order of (1) a cushion layer preparation step, and (2) the cushion layer. A foaming step for foaming; (3) a printing step for forming a printed layer by printing on the cushion layer or bonding a film or paper with a printed pattern; and (4) a resin containing an acrylic elastic resin. An elastic layer forming step of forming an elastic layer from the composition or a resin composition containing an acrylic elastic resin and polylactic acid; and (5) bonding the foamed cushion layer to the printed layer and the elastic layer. And a step of manufacturing a cushion flooring.

  According to the present invention, since the elastic layer is applied as the surface layer constituting the cushion flooring, the surface treatment layer disposed on the surface layer is worn and the surface layer is exposed. However, the elastic layer constituting the surface layer is an acrylic elastic resin or an acrylic elastic resin and a composite resin containing polylactic acid (PLA), which is environmentally friendly, biodegradable, and does not require a toxic plasticizer. The non-toxic and environmentally friendly cushion flooring that prevents the user from being exposed to harmful substances and the manufacturing method thereof, in particular, looks good and has various functions, especially There is a merit that interlayer noise can be prevented by providing sound insulation and cushioning properties.

It is sectional drawing which shows typically 1st Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 2nd Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 3rd Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 4th Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 5th Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 6th Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 7th Embodiment of the cushion flooring of this invention. It is sectional drawing which shows typically 8th Embodiment of the cushion flooring of this invention. It is a block diagram which shows typically the manufacturing process of the cushion flooring of this invention.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, the cushion flooring according to the first embodiment of the present invention includes a cushion layer 20, a printed layer 50, and an elastic layer 70 in this order from the lower part to the upper part. Includes an acrylic elastic resin.

  The cushion layer 20 in the present invention is made of a foamable synthetic resin, and is used as a flooring material to give a cushion to some extent and absorb the impact. The cushion layer 20 functions to give a volume feeling to the cushion flooring.

  For such a cushion layer 20, a plurality of types of polyvinyl chloride, pre-crosslinked acrylonitrile butadiene-vinyl chloride copolymer resin, modified olefin resin, ethylene vinyl acetate resin (EVA) or thermoplastic urethane resin (TPU) are selected. Including. Preferably, the cushion layer 20 has a composition of 1 to 300 parts by weight of a pre-crosslinked acrylonitrile butadiene-vinyl chloride copolymer resin, 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700, and a modified olefin. 0.1 to 200 parts by weight of resin, 5 to 100 parts by weight of ethylene vinyl acetate resin (EVA) or thermoplastic polyurethane resin (TPU), 30 to 85 parts by weight of plasticizer, 1 to 5 parts by weight of foam stabilizer and foaming agent 2-6 parts by weight are included. The cushion layer 20 made of such a material is usually obtained by heat treatment, preferably by heat treatment in a foaming oven.

  The printed layer 50 in the present invention plays a role of giving various printed patterns to the obtained cushion flooring. Here, the printing layer 14 is formed by performing transfer printing, gravure printing, or screen printing on a layer on which a printing pattern is to be formed, and it is preferable to perform transfer printing. Alternatively, a film with a printed pattern or paper is selectively bonded to form. Such a print layer has a function of giving a pattern by printing and giving a good-looking appearance and design effect.

  The elastic layer 70 according to the present invention includes an acrylic elastic resin, gives elasticity, flexibility, and sound insulation to the surface layer of the flooring, and the surface treatment layer disposed on the upper surface layer is worn away. Even if the layer is exposed, it serves to prevent the user from being exposed to harmful substances.

  The acrylic elastic resin 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. Here, the copolymer is a core-shell structure copolymer or block copolymer.

  The copolymer of the core-shell structure has a structure in which a soft segment is a core and a hard segment is a shell surrounding the core.

  Examples of the method for producing the copolymer having the core-shell structure include a method of producing a shell that includes a hard segment and surrounds the core after producing a core including a soft segment. The core and shell are produced by emulsion polymerization or suspension polymerization, but are preferably produced by suspension polymerization that facilitates polymer separation and processing.

  In addition, the block copolymer is composed of a soft segment and a hard segment, but a triblock copolymer in which hard segments are bonded to both ends of the soft segment improves low temperature impact resistance, heat resistance, and the like. This is preferable. As a method for producing the block copolymer, a method of living polymerizing monomers constituting each block is used. Examples of the living polymerization method include, for example, a method in which an organic alkali metal compound is used as a polymerization initiator and anion polymerization is performed in the presence of a photoacid salt such as an alkali metal or alkaline earth metal salt. A method in which the compound is used as a polymerization initiator and anionic polymerization in the presence of an organoaluminum compound, a method in which an organic rare earth metal complex is used as a polymerization initiator, an α-halogenated ester compound as an initiator in the presence of a copper compound And a radical polymerization method. Or the method of polymerizing the monomer which comprises each block using a polyvalent radical polymerization initiator and a polyvalent radical chain transfer agent, and manufacturing the mixture containing a block copolymer etc. are mentioned. Preferably, a high-purity block copolymer is obtained, and a molecular weight distribution is narrow, that is, an oligomer that causes a decrease in impact resistance and heat resistance, or a high molecular weight that causes a decrease in fluidity. Since it does not contain, it is preferable to use the method of anionic polymerization by using an organic alkali metal compound as a polymerization initiator in the presence of an organic aluminum compound. Representative examples of the organoaluminum compound include isobutyl bis (2,6-di-t-butyl-4-methylphenoxy) aluminum, isobutyl bis (2,6-di-t-butylphenoxy) aluminum, isobutyl bis [2 , 2′-methylenebis (4-methyl-6-tert-butylphenoxy)] aluminum, n-octylbis (2,6-di-tert-butyl-4-methylphenoxy) aluminum, n-octylbis (2,6-dioxy) -T-butylphenoxy) aluminum, n-octylbis [2,2'-methylenebis (4-methyl-6-t-butylphenoxy)] aluminum, tris (2,6-di-t-butyl-4-methylphenoxy) Examples thereof include aluminum and tris (2,6-diphenylphenoxy) aluminum. Among them, isobutylbis (2,6-di-t-butyl-4-methylphenoxy) aluminum, isobutylbis (2,4-di-t-butylphenoxy) aluminum, n-octylbis (2,6-di-t-) Butyl-4-methylphenoxy) aluminum or n-octylbis (2,4-di-t-butylphenoxy) aluminum is particularly preferable from the viewpoint of polymerization activity, block efficiency and the like.

  Here, the copolymer has a hard segment: soft segment ratio of 20 to 40:80 to 60 wt%, preferably 25 to 35 wt%: 75 to 65 wt%. It is preferable to use it as a raw material for the flooring while giving elasticity, and to provide suitable mechanical properties, particularly wear resistance.

  The hard segment preferably has a glass transition temperature in the range of 100 ° C. to 120 ° C., and the soft segment preferably has a glass transition temperature in the range of −50 ° C. to −40 ° C. Is.

  Examples of the alkyl methacrylate monomer constituting the hard segment include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, pentyl methacrylate, hexyl methacrylate, and 2-ethylhexyl. One or more selected from the group consisting of methacrylate, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, and cyclohexyl methacrylate, and preferably methyl methacrylate.

  Examples of the alkyl acrylate monomer constituting the soft segment include methyl acrylate, ethyl acrylate, n-propyl acrylate, i-propyl acrylate, n-butyl acrylate, t-butyl acrylate, pentyl acrylate, hexyl acrylate, and 2-ethylhexyl. It is at least one selected from the group consisting of acrylate, heptyl acrylate, octyl acrylate, cyclopentyl acrylate, 3-vinylcyclohexyl acrylate, and cyclohexyl acrylate, and preferably n-butyl acrylate.

  The acrylic elastic resin is characterized in that it does not contain a low molecular weight substance such as residual monomer or oligomer or a plasticizer. In addition, the melt viscosity is low, the fluidity is high, the solution viscosity is low, the discharge amount of volatile organic compounds is small, and the weather resistance is excellent. Furthermore, since the compatibility with the polar resin and the adhesiveness are good, there is an effect that an excellent adhesive force can be obtained when a synthetic resin layer such as polyvinyl chloride (PVC) is selectively disposed in the lower part. is there.

  Since the cushion flooring of the present invention uses the above-mentioned acrylic elastic resin as the elastic layer 70, it is excellent in elasticity, flexibility and sound insulation, and has an effect of giving a soft touch feeling.

  Meanwhile, the elastic layer 70 further includes 1 to 5 parts by weight of a lubricant based on 100 parts by weight of the acrylic elastic resin. The lubricant can be used for the production of flooring. As the lubricant, a hydrocarbon wax or a known commercial higher fatty acid can be used.

  The elastic layer 70 is manufactured by calendar molding, casting molding, blow molding, extrusion molding, or the like. Calendar molding is a molding method in which a raw material is rolled between two or more rolls rotating in opposite directions to continuously produce a sheet or film. Cast molding is excellent in heat resistance and easy to peel. This is a molding method in which a release paper is coated with multiple layers of synthetic resin sol and then laminated. In blow molding, a thermoplastic resin is heated and melted and continuously extruded into a tube shape in an extruder, and then one or two parisons are formed. After fitting and closing in the above mold, sealing the top and bottom, then blowing in air into the parison in the mandrel and inflating it, the parison is in close contact with the inner wall of the mold to produce a hollow container product. Yes, in extrusion molding, a thermoplastic material is heated and melted on the surface of a base material using an extruder to be in a fluid state, and then extruded into a film shape with a T-die. Both a molding method for continuously crimping.

  Preferably, in the case of calendar molding, the content of ingredients such as additives can be freely controlled compared to other manufacturing methods, which results in superior flexibility, impact resistance, mechanical strength, potential In addition, since a flooring material having mounting properties and melting efficiency is provided, and raw material costs are also reduced, it is preferable to manufacture using a calendar molding method.

  The elastic layer 70 is preferably transparent.

  The transparent elastic layer is based on the fact that the acrylic elastic resin is a resin that is processed in a transparent state. By using such a transparent elastic layer, a printing layer or the like disposed below the transparent elastic layer is used. There exists an advantage that the flooring which has an aesthetic sense is provided by existence. The elastic layer 70 functions to provide durability to the cushion flooring according to the present invention and to protect the printed layer 50 underneath.

  Further, as shown in FIG. 2, the cushion flooring of the second embodiment of the present invention includes the cushion layer 20, the printed layer 50, and the elastic layer 70 ′ in this order from the bottom to the top. The elastic layer 70 'includes a composite resin including an acrylic elastic resin and polylactic acid.

  Since the configurations of the cushion layer 20 and the print layer 50 are the same as those described in the cushion flooring of the first embodiment of the present invention, a specific description thereof will be omitted.

  The elastic layer 70 ′ includes a composite resin including an acrylic elastic resin and polylactic acid, and a mixing ratio (weight ratio) of the acrylic elastic resin and polylactic acid is 100: 1 to 1: 100. Preferably, the mixing ratio (weight ratio) of the acrylic elastic resin and polylactic acid is 95: 5 to 50:50, and more preferably 90:10 to 60:40.

  In the case where the elastic layer is composed only of polylactic acid, there are some disadvantages described below.

  First, since polylactic acid has poor dimensional stability, there is a risk that deformation such as shrinkage and twisting may become severe, and the physical properties of the flooring provided with this are not appropriate.

  Second, polylactic acid is prone to blocking phenomenon under high-temperature conditions such as summertime, so it is difficult for films to stick to each other in the wound state, which makes it possible to produce flooring materials using this. There is a risk that the performance will be reduced.

  Third, since polylactic acid has a narrow processing temperature range (130 ° C. to 150 ° C.), the processability is low, and thus the productivity is lowered when the floor material is produced using the polylactic acid.

  Fourthly, since polylactic acid has a narrow use temperature range (20 ° C. to 35 ° C.), it is difficult to apply to flooring, and when it deviates from the above use temperature range, that is, it is excessively cured at 20 ° C. or less. It tends to be damaged especially in winter, and since it tends to lose elasticity and become too soft at 35 ° C or higher, the physical properties required as a flooring material may be drastically reduced and the function as a flooring material may be lost. There is.

  Therefore, the elastic layer 70 ′ used in the present invention has a mixing ratio (weight ratio) of acrylic elastic resin and polylactic acid of 100: 1 to 1: 100, preferably 95: 5 to 50:50, Preferably, it is formed of a composite resin mixed at 90:10 to 60:40, and has characteristics that it provides elasticity, flexibility and sound insulation as compared with the case where polylactic acid is used alone. Within the above-mentioned range of use, the elastic layer is excellent in elasticity, flexibility and sound insulation, and in particular, an elastic layer that can be suitably used for the production of flooring is obtained.

  When the content of the acrylic elastic resin is lower than the above range, the disadvantages of using the above-mentioned polylactic acid as a flooring material, that is, low dimensional stability, high temperature blocking problem, narrow processing temperature range and use temperature range. It is not preferable because it is not enough to solve the problem.

  Since the elastic layer 70 ′ in the present invention includes a composite resin including an acrylic elastic resin and polylactic acid, the surface layer of the flooring is provided with elasticity, flexibility, and sound insulation, and is disposed above the surface layer. Even when the surface treatment layer is worn and the surface layer is exposed, the user is not exposed to harmful substances.

  The cushion flooring according to the second embodiment of the present invention is the same as the cushion flooring according to the first embodiment except that a composite resin containing an acrylic elastic resin and polylactic acid is used as the elastic layer 70 ′. The duplicate description is omitted. That is, the type and characteristics of the acrylic elastic resin and the method for forming the elastic layer 70 'are the same as those of the cushion flooring of the first embodiment.

  Since the cushion flooring of the present invention includes the above-described acrylic elastic resin and the composite resin containing polylactic acid as the elastic layer 70 ′, the cushion flooring is excellent in elasticity, flexibility and sound insulation, and has a soft touch feeling. There is an effect of being given.

  Moreover, as shown in FIG. 3, the cushion flooring of the third embodiment of the present invention has a cushion layer 20, a dimension stabilizing layer 40, a printed layer 50, and an elastic layer 70 in this order from the lower part to the upper part. The elastic layer contains an acrylic elastic resin.

  Since the cushion flooring of the third embodiment of the present invention is the same as the cushion flooring of the first embodiment except that the dimension stabilizing layer 40 is further provided between the cushion layer 20 and the printed layer 50, The duplicate description is omitted.

  The dimension stabilizing layer 40 serves to reinforce the dimension stability of the cushion flooring. Such a dimensionally stable layer 40 is preferably made of a glass fiber impregnated with a polyvinyl chloride (PVC) sol, preferably a glass fiber nonwoven fabric. In this case, the impregnation with the polyvinyl chloride (PVC) sol is understood to fix the glass fiber and to make it easy for such a dimensionally stable layer to be bonded to the printed layer or cushion layer. The Here, the polyvinyl chloride (PVC) sol is preferably 100 parts by weight of polyvinyl chloride having a polymerization degree of 1200 to 1700, dioctyl terephthalate (DOTP) or dioctyl phthalate (DOP) 50 as a plasticizer. -100 parts by weight, 1 to 3 parts by weight of epoxidized soybean oil, 2 to 6 parts by weight of a barium-zinc stabilizer, 10 to 80 parts by weight of calcium carbonate, and 5 to 50 parts by weight of titanium dioxide as a white pigment.

  Moreover, as shown in FIG. 4, the cushion flooring of the fourth embodiment of the present invention has a cushion layer 20, a dimension stabilizing layer 40, a printed layer 50, and an elastic layer 70 in this order from the bottom to the top. The elastic layer 70 'includes a composite resin including an acrylic elastic resin and polylactic acid.

  Since the cushion flooring of the fourth embodiment of the present invention is the same as the cushion flooring of the second embodiment except that the dimension stabilizing layer 40 is further provided between the cushion layer 20 and the printed layer 50, The duplicate description is omitted.

  The dimension stabilizing layer 40 serves to reinforce the dimension stability of the cushion flooring. Such a dimensionally stable layer 40 is preferably made of a glass fiber impregnated with a polyvinyl chloride (PVC) sol, preferably a glass fiber nonwoven fabric. In this case, the impregnation with the polyvinyl chloride (PVC) sol is understood to fix the glass fiber and to make it easy for such a dimensionally stable layer to be bonded to the printed layer or cushion layer. The Here, the polyvinyl chloride (PVC) sol is preferably 100 parts by weight of polyvinyl chloride having a degree of polymerization of 1200 to 1700, 50 to 100 parts by weight of dioctyl terephthalate (DOTP) or dioctyl phthalate (DOP) as a plasticizer. 1 to 3 parts by weight of epoxidized soybean oil, 2 to 6 parts by weight of a barium-zinc 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.

  On the other hand, the cushion flooring of the first to fourth embodiments further includes a surface treatment layer 80 that is selectively formed on the uppermost layer.

  That is, the surface treatment layer 80 is laminated on top of the elastic layers 70, 70 ′, prevents contamination from adhering to the surface of the cushion flooring, and improves the scratch resistance and wear resistance, Has an initial contamination prevention function. The surface treatment layer 80 is generally formed by coating a coating solution in which a thermosetting or photocurable compound is dissolved in a solvent. However, in the case of a photocurable compound, when heat is applied to form the surface treatment layer, the physical properties of other layers disposed below the heat, particularly the elastic layer, are changed by the heat. More preferably, is used. At this time, as the curable compound, a monomer or oligomer having one or more functional groups such as an unsaturated bond group capable of crosslinking reaction is used, and urethane acrylate, epoxy acrylate, polyether acrylate, polyester acrylate, dipentaacrylate. Examples include tritolhexaacrylate, dipentaacrylitol, pentaacrylate, pentaacrythiotol tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, etc., but these are merely examples and the present invention is not limited thereto. It will never be done. In this invention, these are used individually or in mixture of 2 or more types as a photocurable compound. The coating liquid containing the photocurable compound usually contains a photopolymerization initiator in addition to the photocurable compound and the solvent, and if necessary, a hard coating such as a light stabilizer or a leveling agent. Various additives are contained within a range that does not change the physical properties of the layer. The surface treatment layer has a surface hardness measured by pencil hardness of 7H or more, and has a high surface hardness on the surface of the plastic film, and more preferably is adjusted to fall within a range of 7H to 8H. It is preferable. The photocurable compound constituting the surface treatment layer is preferably a normal photocurable urethane acrylate.

Furthermore, the cushion flooring of the first to fourth embodiments further includes a transparent layer 60 that is selectively formed between the printed layer 50 and the elastic layers 70 and 70 '.
The transparent layer 60 is made of polyvinyl chloride (PVC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), polyethylene (PE), polyethylene (PE), polyethylene (PE), polyethylene (PE), polyethylene (PE), polyethylene (PE), polyethylene, PE). Polymethyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), polycarbonate (polycarbonate; PC), styrene-acrylonitrile copolymer (styrene) acrylonitrile Copolymer; a film produced by any one resin selected from SAN). Preferably, a transparent polyvinyl chloride or transparent polyethylene terephthalate film excellent in transparency is used.

  The transparent layer 60 is applied together with the elastic layers 70 and 70 'to reduce the thickness of the elastic layers 70 and 70'. This reduces the amount of acrylic elastic resin used, which is relatively expensive compared to polyvinyl chloride (PVC) or polyethylene terephthalate (PET), which are the materials of the transparent layer 60, thereby reducing costs. The transparent layer formed on the printed layer functions to exhibit the same or similar effect on function and appearance while reducing the manufacturing cost as compared with the case where the entire transparent layer is made of an elastic layer.

  Furthermore, the cushion flooring of the third embodiment and the fourth embodiment further includes a colored layer 51 that is selectively formed between the dimensionally stable layer 40 and the printed layer 50. The colored layer 51 functions to assist the printing layer 50 to form a background color as a background of the pattern formed on the printing layer 50. The colored layer 51 is configured to include polyvinyl chloride and a filler (that is, calcium carbonate) having the same composition as the cushion layer 20 except that the colored layer 51 is not foamed. Here, preferably, the colored layer 51 is 30 to 100 parts by weight of dioctyl terephthalate (DOTP) or dioctyl phthalate (DOP) as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700. 1 to 3 parts by weight of epoxidized soybean oil (ESO), 2 to 6 parts by weight of a barium-zinc stabilizer, 1 to 150 parts by weight of calcium carbonate, and 1 to 20 parts by weight of titanium dioxide which is a white pigment. Including. The colored layer 51 is manufactured by calendar molding, casting molding or the like.

  Furthermore, the cushion flooring of the third embodiment and the fourth embodiment further includes a slip sheet layer 30 that is selectively formed between the cushion layer 20 and the dimension stabilizing layer 40.

  The interleaving paper layer 30 functions to improve the adhesive force between the dimension stabilizing layer 40 and the cushion layer 20. Here, preferably, the interleaving paper layer 30 is 30 to 85 parts by weight of dioctyl terephthalate (DOTP) or dioctyl phthalate (DOP) as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700. 1 to 3 parts by weight of epoxidized soybean oil (ESO), 1 to 80 parts by weight of calcium carbonate, and 2 to 6 parts by weight of a barium-zinc stabilizer. The interleaving paper layer 30 is manufactured by calendar molding, casting molding or the like.

  In addition, the cushion flooring of the first to fourth embodiments includes a balance layer 10 that is selectively formed in the lowermost layer.

  The balance layer 10 serves to balance the general warpage of the upper and lower portions of the flooring. The balance layer 10 is configured to include polyvinyl chloride and a filler (that is, calcium carbonate) having the same composition as the cushion layer 20. For this reason, it is not particularly limited in the present invention. Here, preferably, the balance layer 10 is composed of 30 to 100 parts by weight of dioctyl terephthalate (DOTP) or dioctyl phthalate (DOP) as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700. 1 to 3 parts by weight of epoxidized soybean oil (ESO), 2 to 6 parts by weight of a barium-zinc stabilizer, and 1 to 150 parts by weight of calcium carbonate. The balance layer 10 is manufactured by calendar molding, casting molding or the like.

  On the other hand, the cushion flooring of the first to fourth embodiments includes an additional functional layer 11 that is selectively formed in the lowermost layer.

  The additional functional layer 11 is made of a normal woven fabric, knitted fabric, or non-woven fabric, and the woven fabric, knitted fabric or non-woven fabric is a woven fabric woven or knitted from natural fibers, synthetic fibers, or blended yarns obtained by blending them. It is a knitted fabric or a non-woven fabric produced by a known processing method such as a needle punch, and the product has a good appearance of the cushion flooring, in particular, the appearance of the back surface (floor surface) of the cushion flooring. It functions to enhance the market value, increase the market value, and improve the adhesion of the cushion floor material to the floor surface to facilitate the installation of the cushion floor material.

  Hereinafter, the first to fourth embodiments are the selective components, that is, the surface treatment layer 80, the transparent layer 60, the colored layer 51, the interleaf sheet layer 30, the balance layer 10, and the additional functional layer 11. A specific embodiment further including at least one or more layers will be described.

  FIG. 5 shows a fifth embodiment of the cushion flooring of the present invention. In this order from the lower part to the upper part, the balance layer 10, the cushion layer 20, the interleaf sheet layer 30, the dimension stabilizing layer 40, and the printing. This is a cushion flooring in which the layer 50, the transparent layer 60, the elastic layers 70 and 70 ′, and the surface treatment layer 80 are laminated.

  In the case of the cushion flooring having such a layer structure, the cushion flooring is preferably configured such that the balance layer 10 is 0.1 to 0.2 mm and the cushion layer 20 is 0.3 to 3.0 mm (foamed). Previous thickness), the interleaving layer 30 is 0.05 to 0.60 mm, the dimensionally stable layer 40 is 0.32 to 0.38 mm, the transparent layer 60 is 0.1 to 0.7 mm, and the elastic layer 70 and 70 ′ are 0.1 to 0.2 mm, and the surface treatment layer 80 has a thickness in the range of 20 to 40 μm, and the cushion flooring provided with these layers has a total thickness of It is adjusted to be about 4.5 mm.

  Preferably, the printing layer 50 is an ink layer formed by transfer printing on the dimensionally stable layer 40. Specifically, the printing layer 50 is formed so thin that it is difficult to measure the thickness. Since it is thin enough not to affect the total thickness of the cushion flooring obtained by the present invention, the thickness can be ignored. Alternatively, a film or paper with a printed pattern may be selectively bonded.

  In the above configuration, the balance layer 10 and the transparent layer 60 can be omitted. However, when the transparent layer 60 is omitted, the elastic layers 70 and 70 ′ are preferably thicker. In this case, the thickness of the elastic layers 70 and 70 ′ is in the range of 0.5 to 1.0 mm. Is within.

  FIG. 6 shows a sixth embodiment of the cushion flooring of the present invention. The additional functional layer 11, the cushion layer 20, the interleaf sheet layer 30, the dimension stabilizing layer 40, in this order from the bottom to the top. A cushion flooring in which the printed layer 50, the transparent layer 60, the elastic layers 70 and 70 ′, and the surface treatment layer 80 are stacked is provided, and the additional functional layer 11 is used instead of the balance layer 10 as shown in FIG. This is the same as the cushion flooring of the fifth embodiment.

  In the case of the cushion flooring having such a layer structure, the cushion flooring is preferably 0.1 to 0.2 mm for the additional functional layer 11 and 0.3 to 3.0 mm for the cushion layer 20 ( Thickness before foaming), the slip sheet layer 30 is 0.05 to 0.60 mm, the dimensionally stable layer 40 is 0.32 to 0.38 mm, the transparent layer 60 is 0.1 to 0.7 mm, and the elasticity The layers 70 and 70 ′ have a thickness in the range of 0.1 to 0.2 mm, and the surface treatment layer 80 has a thickness in the range of 20 to 40 μm.

  Furthermore, in the above configuration, the additional functional layer 11 and the transparent layer 60 can be omitted. However, when the transparent layer 60 is omitted, the elastic layers 70 and 70 ′ are preferably thicker. In this case, the thickness of the elastic layers 70 and 70 ′ is in the range of 0.5 to 1.0 mm. Is within.

  FIG. 7 shows a seventh embodiment of the cushion flooring of the present invention. In this order from the bottom to the top, the balance layer 10, the cushion layer 20, the dimension stabilizing layer 40, the colored layer 51, and the printing layer. 50, a cushion flooring in which the transparent layer 60, the elastic layers 70 and 70 ′, and the surface treatment layer 80 are laminated is provided.

  In the case of the cushion flooring having such a layer structure, the cushion flooring is preferably configured such that the balance layer 10 is 0.1 to 0.2 mm and the cushion layer 20 is 0.3 to 3.0 mm (foamed). Previous thickness), the dimension stabilizing layer 40 is 0.32-0.38 mm, the colored layer 51 is 0.1-0.2 mm, the transparent layer 60 is 0.1-0.7 mm, the elastic layer 70 70 ′ has a thickness in the range of 0.1 to 0.2 mm, and the surface treatment layer 80 has a thickness in the range of 20 to 40 μm.

  Furthermore, in the above configuration, the balance layer 10 and the transparent layer 60 can be omitted. However, when the transparent layer 60 is omitted, the elastic layers 70 and 70 ′ are preferably thicker. In this case, the thickness of the elastic layers 70 and 70 ′ is in the range of 0.5 to 1.0 mm. Is within.

  FIG. 8 shows an eighth embodiment of the cushion flooring of the present invention. The additional functional layer 11, the cushion layer 20, the dimension stabilizing layer 40, the printing layer 50, and the transparent layer are arranged in this order from the bottom to the top. A cushion flooring in which the layer 60, the elastic layers 70 and 70 ', and the surface treatment layer 80 are laminated is provided.

  However, the cushion flooring according to the eighth embodiment is a non-foamed cushion flooring because it does not contain a foaming agent and a foaming stabilizer as the composition of the cushion layer 20.

  However, in the floor material of the eighth embodiment, the cushion layer 20 may be produced by foaming including a foaming agent and a foam stabilizer as in the cushion layer 20 of the other embodiments.

  In the case of the cushion flooring having such a layer structure, the cushion flooring is preferably 0.1 to 0.2 mm for the additional functional layer 11 and 0.3 to 3.0 mm for the cushion layer 20 ( Thickness before foaming), the dimension stabilizing layer 40 is 0.32-0.38 mm, the transparent layer 60 is 0.1-0.7 mm, the elastic layers 70, 70 ′ are 0.1-0.2 mm, The surface treatment layer 80 has a thickness in the range of 20 to 40 μm.

  In the above configuration, the additional functional layer 11 and the transparent layer 60 can be omitted. However, when the transparent layer 60 is omitted, the elastic layers 70 and 70 'are preferably higher. In this case, the thickness of the elastic layers 70 and 70' ranges from 0.5 mm to 1.0 mm. Is within.

  Furthermore, in the cushion flooring of the present invention, a polylactic acid (PLA) layer may be used in place of the elastic layers 70 and 70 '. However, as described above, when polylactic acid is used alone, the dimensions are low. It is not preferred because of problems of stability, high temperature blocking, narrow processing temperature range and use temperature range.

  Furthermore, the present invention provides a cushion floor material comprising a cushion layer, a printed layer and an elastic layer in this order from the lower part to the upper part. (1) A step of preparing the cushion layer 20, and (2) the cushion. A foaming step for foaming the layer 20, (3) a printing step for forming the printed layer 50 by printing on the cushion layer 20 or pasting a film or paper with a printed pattern, and (4) acrylic An elastic layer forming step of forming elastic layers 70 and 70 'from a resin composition containing an elastic resin or a resin composition containing an acrylic elastic resin and polylactic acid, (5) the foamed cushion layer 20, and the printing And a bonding step of bonding the layer 50 and the elastic layers 70, 70 ′ together, to provide a method for producing a cushion flooring (FIG. 9). Irradiation).

  The method for producing a cushion flooring of the present invention further includes a dimensionally stable layer forming step of forming a dimensionally stable layer 40 made of glass fibers impregnated with a polyvinyl chloride (PVC) sol. In this case, before the foaming step, in order to improve the adhesive force between the dimensionally stable layer 40 and the cushion layer 20, a slip sheet layer 30 is prepared on the cushion layer 20 so as to be spaced from the cushion layer 20. The paper layer 30 may be bonded. In addition, when forming the dimension stable layer 40, it prints not on the cushion layer 20, but on the dimension stable layer 40, or the film or paper with a printing pattern is bonded together, and the printing layer 50 is formed.

  In addition, before the foaming step, a balance layer 10 manufactured separately from a resin composition containing polyvinyl chloride and a filler is prepared and bonded to the cushion layer 20 or the cushion layer 20 and the interleaf sheet layer 30. Also good.

  Alternatively, an additional function layer 11 made of a woven fabric, a knitted fabric, or a nonwoven fabric may be separately prepared and bonded to the cushion layer 20 before the foaming step.

  Moreover, after preparing the colored layer 51 which consists of a resin composition containing a polyvinyl chloride and a filler separately before the said printing step, it prints on this colored layer 51, or prints using the film or paper with a printing pattern. Layer 50 is formed.

  Furthermore, the said bonding step further prepares the transparent layer 60 made from a transparent polyvinyl chloride (PVC) film or a polyethylene terephthalate (PET) film, and the transparent layer 60 is made into the printing layer 50 and the elastic layers 70 and 70 '. It is the step of pasting after interposing between.

  Furthermore, after the bonding step, the method further includes a surface treatment step of coating the photocurable composition on the elastic layer and curing the photocurable composition by irradiating ultraviolet rays to form the surface treatment layer 80. .

  Since the specific description about each layer and the specific description regarding the production of each layer are understood to be the same as or similar to the above, the redundant description thereof will be omitted.

  The manufacturing method of the cushion flooring according to the present invention described above is summarized as follows.

Each layer constituting the cushion flooring of the present invention is manufactured by calendar molding, casting molding, blow molding, extrusion molding or the like, except for the printing layer 50 and the dimension stabilizing layer 40.
The plurality of layers manufactured in this way are firstly added to the additional function layer 11 (selectively applicable), the balance layer 10 (selectively applicable), the cushion layer 20 and the interleaf. After layer 30 (which can be selectively applied) is bonded (primarily bonded), it is foam-molded in an oven.

  Further, a glass fiber nonwoven fabric is impregnated with a polyvinyl chloride (PVC) sol, and the pattern is formed by performing normal printing, for example, gravure printing, screen printing or transfer printing on the upper surface of the dimensionally stable layer 40 formed after gelation. The printing layer 50 is formed by applying the above, or the printing layer 50 is formed by pasting a film or paper with a printing pattern. In contrast to this, after further forming the colored layer 51 on the dimensionally stable layer 40, the printed layer 50 is formed by giving a pattern by performing gravure printing, screen printing or transfer printing on the colored layer, Alternatively, the printed layer 50 is formed by pasting a film or paper with a printed pattern.

  At the same time, a transparent layer 60, preferably a transparent polyvinyl chloride (PVC) film or a transparent polyethylene terephthalate (PET) film is disposed on the upper surface of the printed layer 50, and the elastic layer 70, The elastic layers 70 and 70 ′ are bonded together (secondarily bonded) immediately without the transparent layer 60.

  After the layers constituting the upper and lower parts of the flooring are bonded separately in this manner, the dimension stabilizing layer 40 is abutted against the interleaf sheet layer 30 and then bonded together (thirdarily bonded). ).

When a plurality of layers are bonded together, the layers are cooled and selectively coated on the upper surfaces of the elastic layers 70 and 70 ′, preferably the photocurable compound is dissolved in a solvent. The coating liquid is coated and cured by irradiating with ultraviolet rays to form the surface treatment layer 80, thereby obtaining a cushion floor material as a final product.
Hereinafter, the present invention will be described by way of examples in order to assist in understanding the present invention. However, the following examples are merely illustrative of the present invention, and various modifications are possible within the scope of the present invention and the scope of the technical idea. It will be apparent to those skilled in the art that changes and modifications can be made, and such changes and modifications fall within the scope of the appended claims.

[Example]
Example 1
The balance layer 10, the cushion layer 20, the interleaving paper layer 30, the dimension stabilizing layer 40, the printing layer 50, the transparent layer 60, the elastic layer 70 ′, and the surface treatment layer 80 are laminated in this order from the bottom to the top. As the transparent layer 60, a transparent polyvinyl chloride (PVC) film is used, and as the elastic layer 70 ′, a mixed ratio of acrylic elastic resin and polylactic acid used (weight ratio) is set to 60:40. The cushion flooring 1 according to the present invention is made to have a total thickness of 4.5 mm by using a mixture prepared by mixing 1 part by weight of polyethylene wax as a lubricant with 100 parts by weight of resin as a reference and producing a thickness of 0.2 mm. (See FIG. 5).

Example 2
In Example 1, the cushion flooring 1 according to the present invention was manufactured in the same manner as in Example 1 except that the transparent layer 60 was not used and the thickness of the elastic layer 70 ′ was 0.5 mm. .

Comparative Example 1
A cushion flooring 1 according to the present invention was manufactured in the same manner as in Example 1 except that only the transparent layer 60 was laminated instead of the transparent layer 60 and the elastic layer 70 'in Example 1.

Experimental example 1
Comparative experiment on the total amount of volatile organic compounds (TVOC) released from the conventional flooring material (Comparative Example 1) in which the cushion flooring material of Example 1 and Example 2 and the commercialized transparent layer 60 constitute the surface layer The results are shown in Table 1 below.

  The total amount of volatile organic compound (TVOC) emissions was measured using the Korea Environment Department Notification No. 2010-24, Indoor Air Quality Process Test Standard Small Chamber Method. In this method, a specimen of a flooring material as a test material is put into a small chamber of 20 L capacity connected to a mass spectrometer / high performance liquid chromatography (MS / HPLC), and the total volatilization emitted from the specimen is made. The total volatile organic compound (TVOC) in the incoming air is measured such that the volatile organic compound (TVOC) is collected by the small chamber and flows directly into the mass spectrometer / high performance liquid chromatography Is the method. Another test condition is a condition in which a flooring is placed under an actual living environment, and at this time, the temperature is an ambient temperature (about 25 ° C.). In addition, the test piece of an Example and a comparative example was tested over the same time under the same temperature, and the discharge amount of the total volatile organic compound (TVOC) on the same conditions was compared.

  As shown in Table 1, the cushion floorings according to the present invention (Example 1 and Example 2) release total volatile organic compounds (TVOC) compared to the prior art flooring (Comparative Example 1). It was confirmed that the amount was reduced.

Experimental example 2
Table 2 below shows test materials for comparing the sound insulation performance of Examples 1 and 2 and Comparative Example 1. The sound insulation performance test was measured according to KS F 2810-1 (lightweight impact sound test conditions). The control group is intended for a floor surface without a rug in a state where no flooring is provided, and Comparative Example 1 is intended for the control group provided with the flooring material of Comparative Example 1 on the floor surface without a rug, and Examples 1 and 2 are directed to the control group in which the flooring of Example 1 and Example 2 is provided on the floor surface without a rug.

  As shown in Table 2, it was confirmed that the cushioning flooring according to the present invention had improved sound insulation performance compared to the flooring of the prior art (Comparative Example 1).

DESCRIPTION OF SYMBOLS 1 Cushion flooring 10 Balance layer 11 Additional functional layer 20 Cushion layer 30 Interleaf layer 40 Dimensional stabilization layer 50 Print layer 51 Colored layer 60 Transparent layer 70, 70 'Elastic layer 80 Surface treatment layer

Claims (35)

From the lower part to the upper part in this order, the cushion layer, the printing layer and the elastic layer are provided, but the elastic layer includes only an acrylic elastic resin as a resin ,
The acrylic elastic resin is a block 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 block copolymer is a triblock copolymer in which hard segments are bonded to both ends of the soft segment,
The block copolymer is characterized in that the hard segment: soft segment has a mixing ratio in the range of 20-40: 80-60% by weight. In this order from the bottom to the top, a cushion layer, a printing layer and an elastic layer are provided, but the elastic layer includes only a composite resin composed of an acrylic elastic resin and polylactic acid as a resin ,
The mixing ratio of the acrylic elastic resin and the polylactic acid is 90: 10-60: 40,
The acrylic elastic resin is a block 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 block copolymer is a triblock copolymer in which hard segments are bonded to both ends of the soft segment,
The block copolymer is characterized in that the hard segment: soft segment has a mixing ratio in the range of 20-40: 80-60% by weight. In this order from the bottom to the top, the cushion layer, the dimension stabilizing layer, the printing layer and the elastic layer are provided, but the elastic layer includes only an acrylic elastic resin as a resin ,
The acrylic elastic resin is a block 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 block copolymer is a triblock copolymer in which hard segments are bonded to both ends of the soft segment,
The block copolymer is characterized in that the hard segment: soft segment has a mixing ratio in the range of 20-40: 80-60% by weight. From the bottom to the top in this order, the cushion layer, the dimension stabilizing layer, the printing layer and the elastic layer are provided, but the elastic layer includes only a composite resin composed of an acrylic elastic resin and polylactic acid as a resin ,
The mixing ratio of the acrylic elastic resin and the polylactic acid is 90: 10-60: 40,
The acrylic elastic resin is a block 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 block copolymer is a triblock copolymer in which hard segments are bonded to both ends of the soft segment,
The block copolymer is characterized in that the hard segment: soft segment has a mixing ratio in the range of 20-40: 80-60% by weight.   5. The elastic layer according to claim 1, wherein the elastic layer has a thickness of 0.1 to 0.2 mm, or a thickness of 0.5 to 1.0 mm. Cushion flooring.   5. The block copolymer according to claim 1, wherein the block copolymer has a hard segment: soft segment ratio of 25 to 35:75 to 65 wt%. Cushion flooring as described.   The hard segment has a glass transition temperature in a range of 100 ° C to 120 ° C, and the soft segment has a glass transition temperature in a range of -50 ° C to -40 ° C. The cushion flooring according to claim 1.   The alkyl methacrylate monomer constituting the hard segment is methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, pentyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate. Any one or more selected from the group consisting of benzene, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, and cyclohexyl methacrylate, according to any one of claims 1 to 4. Cushion flooring as described.   The cushion flooring according to claim 8, wherein the alkyl methacrylate monomer is methyl methacrylate.   The alkyl acrylate monomer constituting the soft segment is methyl acrylate, ethyl acrylate, n-propyl acrylate, i-propyl acrylate, n-butyl acrylate, t-butyl acrylate, pentyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate Or any one or more selected from the group consisting of: heptyl acrylate, octyl acrylate, cyclopentyl acrylate, 3-vinyl cyclohexyl acrylate, and cyclohexyl acrylate. Cushion flooring as described.   The cushion flooring according to claim 10, wherein the alkyl acrylate monomer is n-butyl acrylate.   The elastic layer further includes 1 to 5 parts by weight of a lubricant based on 100 parts by weight of an acrylic elastic resin or based on 100 parts by weight of a composite resin. The cushion flooring according to any one of the above.   The cushion flooring according to any one of claims 1 to 4, wherein the cushion layer is a foam layer or a non-foam layer.   5. The print layer according to claim 1, wherein the print layer is an ink layer formed by transfer printing, gravure printing, or screen printing, or a film or paper with a printed pattern. The cushion flooring according to one item.   The cushion flooring according to claim 3 or 4, wherein the dimensionally stable layer is a glass fiber impregnated with a polyvinyl chloride (PVC) sol.   The said cushion flooring is further provided with the surface treatment layer formed on the said elastic layer, The cushion flooring as described in any one of Claims 1-4 characterized by the above-mentioned.   The said cushion flooring is further provided with the transparent layer formed between a printing layer and an elastic layer, The cushion flooring as described in any one of Claims 1-4 characterized by the above-mentioned. The cushion flooring according to claim 17 , wherein the transparent layer is a transparent polyvinyl chloride (PVC) film or a transparent polyethylene terephthalate (PET) film.   The cushion flooring according to claim 3 or 4, wherein the cushion flooring further includes a colored layer formed between the dimensionally stable layer and the printing layer. 20. The cushion flooring according to claim 19 , wherein the colored layer includes polyvinyl chloride and a filler.   The cushion flooring according to claim 3 or 4, further comprising a slip-sheet layer formed between the cushion layer and the dimensionally stable layer to improve adhesion. The cushion flooring according to claim 21 , wherein the slip-sheet layer includes polyvinyl chloride and a filler.   The said cushion flooring is further provided with the additional function layer or balance layer formed in the lower part of the said cushion layer, The cushion flooring as described in any one of Claims 1-4 characterized by the above-mentioned. The cushion flooring according to claim 23 , wherein the balance layer includes polyvinyl chloride and a filler. 24. The cushion flooring according to claim 23 , wherein the additional functional layer is a woven fabric, a knitted fabric, or a nonwoven fabric. In the order of the cushion flooring provided with the cushion layer, the printed layer and the elastic layer in this order from the lower part to the upper part,
(1) a cushion layer preparation step;
(2) a foaming step of foaming the cushion layer;
(3) a printing step in which a printed layer is formed by printing on the cushion layer or by laminating a film or paper with a printed pattern;
(4) an elastic layer forming step of forming an elastic layer from a resin composition containing an acrylic elastic resin or a resin composition containing an acrylic elastic resin and polylactic acid;
(5) a bonding step of bonding the foamed cushion layer, the printing layer, and the elastic layer;
Including
The acrylic elastic resin is a block 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 block copolymer is a triblock copolymer in which hard segments are bonded to both ends of the soft segment,
The block copolymer, the hard segment: soft segments is 20 to 40: 80 to 60 have a mixing ratio in the range of weight percent,
The resin composition containing the acrylic elastic resin contains only an acrylic elastic resin as a resin,
The resin composition containing the acrylic elastic resin and the polylactic acid is a composite resin composed of an acrylic elastic resin and polylactic acid as a resin, and a mixing ratio of the acrylic elastic resin and the polylactic acid is 90:10 The manufacturing method of the cushion flooring characterized by including only the composite resin which is 60:40 . 27. The method for producing a cushion flooring according to claim 26 , further comprising a dimensionally stable layer preparing step of preparing a dimensionally stable layer made of glass fibers impregnated with a polyvinyl chloride (PVC) sol. 28. The cushion flooring according to claim 27 , wherein the printing step is a printing step in which a printing layer is formed by printing on the dimensionally stable layer or pasting a film or paper with a printed pattern. Production method. The method further comprises a surface treatment step of forming a surface treatment layer by coating the photocurable composition on the elastic layer after the bonding step, and curing the photocurable composition by irradiating ultraviolet rays. The manufacturing method of the cushion flooring of Claim 26 to do. 28. The cushion according to claim 27 , further comprising a slip sheet layer forming step of forming a slip sheet layer on top of the cushion layer in order to improve the adhesion between the dimensionally stable layer and the cushion layer. A method for manufacturing flooring. The printing step includes
A printing step in which a colored layer is separately formed using a resin composition containing polyvinyl chloride and a filler, and then the printed layer is formed by printing on the colored layer or by bonding a film or paper with a printed pattern. The method for manufacturing a cushion flooring according to claim 26 , wherein: The pasting step prepares a transparent layer made of a transparent polyvinyl chloride (PVC) film or a transparent polyethylene terephthalate (PET) film, and is pasted so that the transparent layer is interposed between the cushion layer and the elastic layer. 27. The method for manufacturing a cushion flooring according to claim 26 , wherein the step is a matching step. The cushion flooring according to claim 26 , wherein a balance layer manufactured separately from a resin composition containing polyvinyl chloride and a filler is prepared and bonded to the cushion layer before the foaming step. Production method. 27. The method for manufacturing a cushion flooring according to claim 26 , wherein an additional functional layer made of a woven fabric, a knitted fabric or a nonwoven fabric is separately prepared and bonded to the cushion layer before the foaming step. The method for manufacturing a cushion flooring according to claim 26 , wherein the elastic layer has a thickness of 0.1 to 0.2 mm, or a thickness of 0.5 to 1.0 mm.

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