KR102065195B1 - The cushion flooring comprising elastic layer as a surface layer - Google Patents

Abstract

The present invention relates to a cushion flooring, and more particularly, a surface treatment disposed on an upper surface layer by applying an elastic layer including an acrylic elastomeric resin or a composite resin including an acrylic elastomeric resin and a polylactic acid as a surface layer constituting the cushion flooring. Even when the layer is worn and the surface layer is exposed, the present invention relates to a cushion flooring material having excellent sound insulation performance while being non-toxic and environmentally friendly by preventing the user from being exposed to harmful substances.

Description

The cushion flooring comprising elastic layer as a surface layer

The present invention relates to a cushion flooring, and more particularly, a surface treatment disposed on an upper surface layer by applying an elastic layer including an acrylic elastomeric resin or a composite resin including an acrylic elastomeric resin and a polylactic acid as a surface layer constituting the cushion flooring. Even when the layer is worn and the surface layer is exposed, the present invention relates to a cushion flooring material having excellent sound insulation performance while being non-toxic and environmentally friendly by preventing the user from being exposed to harmful substances.

Recently, as the quality of life improves, interest in eco-friendly products as well as health is increasing. For example, flooring materials, which are closely related to residential life, are increasingly using materials that can provide eco-friendly sound insulation. In addition, regulations on materials used to manufacture such flooring materials are gradually being reinforced.

The flooring material, which was previously filed in Korean Patent Laid-Open Publication No. 10-2004-0065494, is mainly made of a PVC material. Specifically, the conventional flooring material is laminated in the order of a balance layer, a cushion layer, a dimensional stability layer, a printing layer, a transparent PVC layer, and a surface treatment layer from below.

However, conventional flooring materials include toxic phthalate-based plasticizers mainly due to the use of PVC materials, and release harmful substances such as environmental hormones and toxic gases (hydrogen chloride) in case of incineration waste or fire, and natural environment in landfill disposal. There is a problem that remains almost permanently under the condition, causing a large environmental burden.

In addition, the flooring has a surface treatment layer formed on the top surface to prevent scratches and contamination, but as time passes, the surface treatment layer may gradually wear out and disappear, in this case, transparent PVC laminated thereunder When the layer is exposed to the outside, such a transparent PVC layer of the PVC material is in direct contact with the human body, there is a problem such that harmful substances emitted from the PVC material adversely affects the human body.

In addition, in recent years, the problem of floor noise in apartments has become a social problem, and the development of flooring materials that can minimize floor noise is urgently needed.

KR 10-2004-0065494 A (published: July 22, 2004)

The present invention has been made to solve the above problems, by applying an elastic layer comprising an acrylic elastomeric resin or a composite resin comprising an acrylic elastomeric resin and polylactic acid (PLA) as a surface layer constituting the cushion flooring material, the upper surface layer It is an object of the present invention to provide a non-toxic, environmentally friendly, cushioning material having excellent sound insulation performance so that the surface treatment layer is worn out so that the user is not exposed to harmful substances even when the surface layer is exposed.

The present invention to solve the above problems sequentially from the bottom to the top, cushioning layer; Dimensionally stable layer; Stop layer; Colored layer; Printed layer; And an elastic layer; wherein the elastic layer provides a cushion flooring material comprising an acrylic elastic resin.

In addition, the present invention sequentially from the bottom to the top, the cushion layer; Dimensionally stable layer; Stop layer; Colored layer; Printed layer; And an elastic layer; wherein the elastic layer provides a cushion flooring material comprising an acrylic resin and a composite resin including polylactic acid.

According to the present invention, an elastic layer is applied as a surface layer constituting the cushion flooring material, and even when the surface treatment layer positioned on the surface layer is worn and the surface layer is exposed, the elastic layer constituting the surface layer is acrylic elastomer resin or acrylic elastomer. It is composed of a composite resin containing polylactic acid (PLA), which is a resin and eco-friendly, biodegradable and resin that does not require toxic plasticizers, thereby providing a non-toxic and eco-friendly cushion flooring material that prevents users from being exposed to harmful substances. It is beautiful in appearance and has various advantages, in particular, by providing sound insulation and cushioning property, thereby preventing interlayer noise.

In addition, the structure of the cushion flooring material, including a stop layer laminated on the upper surface of the dimensional stability layer has the effect of reinforcing the surface pressing strength of the cushion flooring material.

In addition, the structure of the cushion flooring material may include a colored layer stacked below the printing layer to assist the printing layer to form a background color as a background of a pattern formed on the printing layer.

1 is a cross-sectional view schematically showing a first embodiment of the cushion flooring material of the present invention.
Fig. 2 is a sectional view schematically showing a second embodiment of the cushion flooring material of the present invention.
3 is a cross-sectional view schematically showing a third embodiment of the cushion flooring material of the present invention.

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

As shown in Figure 1, the cushion flooring material 1 of the first embodiment of the present invention is sequentially from the bottom to the top, the cushion layer 20; Dimensionally stable layer 40; Stop layer 50; Colored layer 60; Printed layer 70; And an elastic layer 90; wherein the elastic layer 90 is characterized in that it comprises an acrylic elastic resin.

In the present invention, the cushion layer 20 is made of a foamed synthetic resin, and gives a cushion as a flooring material and serves to absorb shocks. In addition, the cushion layer 20 functions to give a volume to the cushion flooring material. The cushion layer 20 may include a plurality of polyvinyl chloride, precrosslinked acrylonitrile butadiene-vinyl chloride copolymer resin, modified olefin resin, ethylene vinyl acetate resin (EVA) or thermoplastic urethane resin (TPU). Can be. Here, preferably, the cushion layer 20 has a composition of 1 to 300 parts by weight of the precrosslinked acrylonitrile butadiene-vinyl chloride copolymer resin and a modified olefin resin based on 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700. 0.1 to 200 parts by weight, 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 2 to 6 parts by weight of foaming agent. Can be. The cushion layer 20 made of such a material is usually obtained by heat treatment through heat treatment, preferably through a foaming oven.

In the present invention, the dimensional stability layer 40 serves to reinforce the dimensional stability of the cushion flooring material. The dimensionally stable layer 40 is preferably made of glass fiber (impregnated with PVC sol), preferably glass fiber nonwoven fabric. In this case, impregnation with the PVC sol can be understood to fix the glass fibers and at the same time to facilitate the plywood with the stop layer or cushion layer. Here, the PVC sol is preferably 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, and epoxy It may include 1 to 3 parts by weight of soybean oil, 2 to 6 parts by weight of barium-zinc-based heat stabilizer, 10 to 80 parts by weight of calcium carbonate, and 5 to 50 parts by weight of titanium dioxide as a white pigment.

In the present invention, the stop layer 50 serves to reinforce the surface pressing strength of the cushion flooring material. The stop layer 50 may be configured to include polyvinyl chloride and a filler (ie, calcium carbonate) having the same composition as the cushion layer 20 except that the foam layer 20 is not foamed. Here, preferably, the composition of the stop layer 50 may include dioctyl terephthalate (DOTP) or dioctylphthalate (DOP) 30 to about 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700. 100 parts by weight, 1 to 3 parts by weight of epoxidized soybean oil (ESO), 2 to 6 parts by weight of barium-zinc-based heat 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. . The stop layer 50 may be manufactured using calender molding, casting molding, blow molding, extrusion molding, or the like.

In the present invention, the colored layer 60 may serve to form a background color serving as a background of a pattern formed on the printed layer 70 by assisting the printed layer 70. The colored layer 60 may be configured to include polyvinyl chloride and a filler (ie, calcium carbonate) having the same composition as the cushion layer 20 except that the colored layer 60 is not foamed. Here, preferably, the colored layer 60 is composed of dioctyl terephthalate (DOTP) or dioctylphthalate (DOP) 30 to 30 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700 as a plasticizer. 100 parts by weight, 1 to 3 parts by weight of epoxidized soybean oil (ESO), 2 to 6 parts by weight of barium-zinc-based heat 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. . The colored layer 60 may be manufactured using calender molding, casting molding, blow molding, extrusion molding, or the like.

In the present invention, the printing layer 70 serves to give various printed patterns to the obtained cushion flooring material. Here, the printing layer 70 may be formed by transfer printing, gravure printing or screen printing on the layer to form a printed pattern, preferably transfer printing. Alternatively, the film may be formed by laminating a film or paper on which a printed pattern is formed. Such a print layer 70 is to give a pattern through printing, it has a function to give the appearance and design effect excellent in aesthetics.

In the present invention, the elastic layer 90 includes an acrylic-based elastic resin, to provide elasticity, flexibility and sound insulation to the surface layer of the flooring material, even if the surface layer is exposed to wear the surface treatment layer located on the upper surface layer of the user Prevents exposure to harmful substances.

The acrylic elastomeric resin may be a copolymer of a polymer of an alkyl methacrylate monomer constituting the hard segment and a polymer of an alkyl acrylate monomer constituting the soft segment. Herein, the copolymer may be a copolymer or block copolymer having a core shell structure.

The core-shell copolymer has a bonding structure of a shell surrounding the core and a soft segment as a core.

As a method for producing the core-shell copolymer, 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 polymerization, but it is preferable to use suspension polymerization which is easy to separate or process the polymer.

In addition, the block copolymer is composed of a soft segment and a hard segment, preferably a triblock copolymer in which hard segments are bonded to both ends of the soft segment is preferable because it can improve the low temperature impact resistance, heat resistance and the like. As a manufacturing method of the said block copolymer, the method of living polymerization of the monomer which comprises each block is used. Such living polymerization is, for example, a method in which an organic alkali metal compound is used as a polymerization initiator and anion polymerization in the presence of a mineral acid salt such as an alkali metal or an alkaline earth metal salt, or the presence of an organoaluminum compound in which the organic alkali metal compound is a polymerization initiator. The method of anionic polymerization under the following, the method of superposing | polymerizing an organic rare earth metal complex as a polymerization initiator, the method of radically polymerizing an alpha-halogenated ester compound in presence of a copper compound as an initiator, etc. are mentioned. Or the method of superposing | polymerizing the monomer which comprises each block using a polyvalent radical polymerization initiator or a polyvalent radical chain transfer agent, and manufacturing it as a mixture containing a block copolymer are mentioned. Preferably, since the block copolymer can be obtained with high purity and does not contain an oligomer which has a narrow molecular weight distribution, that is, a factor of lowering impact resistance and heat resistance, or a high molecular weight of a factor of decreasing fluidity, The method of anionic polymerization is preferable using an organoalkali metal compound as a polymerization initiator and presence of an organoaluminum compound. Typical examples of the organoaluminum compound include isobutyl bis (2,6-di-t-butyl-4-methylphenoxy) aluminum, isobutyl bis (2,6-di-t-butyl phenoxy) aluminum and isobutyl Bis [2,2'-methylenebis (4-methyl-6-t-butylphenoxy)] aluminum, n-octylbis (2,6-di-t-butyl-4-methylphenoxy) aluminum, n- Octyl bis (2,6-di-t-butylphenoxy) aluminum, n-octylbis [2,2'-methylenebis (4-methyl-6-t-butylphenoxy)] aluminum, tris (2,6 -Di-t-butyl-4-methylphenoxy) aluminum, tris (2,6-diphenylphenoxy) aluminum, etc. are mentioned. Among them, isobutyl bis (2,6-di-t-butyl-4-methylphenoxy) aluminum, isobutyl bis (2,4-di-t-butylphenoxy) aluminum, n-octyl bis (2, 6-di-t-butyl-4-methylphenoxy) aluminum or n-octylbis (2,4-dit-butylphenoxy) aluminum is particularly preferable in terms of polymerization activity, block efficiency and the like.

Herein, the copolymer may have a hard segment: soft segment within a range of 20 to 40:80 to 60% by weight, preferably 25 to 35:75 to 65% by weight, to impart elasticity. It is preferable because it can impart mechanical properties suitable for use as a raw material for flooring, especially wear resistance.

The hard segment preferably has a glass transition temperature within the range of 80 to 120 ℃, the soft segment may preferably have a glass transition temperature within the range of -60 to -20 ℃.

As the alkyl methacrylate monomer constituting the hard segment, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate Latex, pentyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, cyclohexyl methacrylate It may be one or more selected from the group consisting of, preferably methyl methacrylate.

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

The acrylic elastic resin does not contain low molecular weight substances such as remaining monomers and oligomers, and does not contain a plasticizer. In addition, the melt viscosity is low, the fluidity is high, the viscosity of the solution is low, the emission of volatile organic compounds is low, and has excellent weather resistance. In addition, the compatibility and polarity with the polar resin is good, when the synthetic resin layer, such as PVC is selectively positioned in the lower portion has an excellent adhesive force.

The cushion flooring material of the present invention is excellent in elasticity, flexibility and sound insulation by using the acrylic elastic resin as the elastic layer 90, and has an effect of providing a soft touch feeling.

On the other hand, the elastic layer 90 may further include 1 to 5 parts by weight of lubricant based on 100 parts by weight of the acrylic elastomeric resin. The lubricant may be used in the manufacture of flooring, hydrocarbon wax or commercially available higher fatty acids may be used.

The elastic layer 90 may be manufactured using calender molding, casting molding, blow molding, extrusion molding, or the like.

The elastic layer 90 may be preferably transparent.

The transparent elastic layer is based on the point that the acrylic elastic resin is a resin which can be processed in a transparent state, and by using the transparent elastic layer, the aesthetic flooring material is formed by the presence of a printing layer or the like positioned below it. It has the advantage of being able to provide. In addition, the elastic layer 90 provides durability to the cushion flooring material according to the present invention, and serves to protect the printed layer 70 below.

In addition, as shown in Figure 2, the cushion flooring material of the second embodiment of the present invention sequentially from the bottom to the top, the cushion layer 20; Dimensionally stable layer 40; Stop layer 50; Colored layer 60; Printed layer 70; And an elastic layer 90 ', wherein the elastic layer comprises a composite resin including an acrylic elastic resin and a polylactic acid.

Since the configuration other than the elastic layer 90 'is the same as that described in the cushion flooring material of the first embodiment of the present invention, a detailed description thereof will be omitted.

The elastic layer 90 'includes a composite resin including an acrylic elastic resin and a polylactic acid, and a mixing ratio (weight ratio) of the acrylic elastic resin and the polylactic acid is used in a range of 100: 1 to 1: 100. Preferably, the mixing ratio (weight ratio) of the acrylic elastomeric resin and the polylactic acid may be 95: 5-30: 70, and more preferably 90: 10-40: 60.

When the elastic layer is composed of only polylactic acid, some disadvantages may exist.

First, polylactic acid has poor dimensional stability, so that deformation, distortion, and the like may occur severely, and thus, the physical properties of the flooring material including the same may be inappropriate.

Second, the polylactic acid does not easily stick to each other in the wound state due to the blocking phenomenon is easily generated under high temperature conditions such as summer, it is possible to reduce the productivity in producing the flooring using it.

Third, the polylactic acid has a narrow processing temperature range (130 to 150 ° C.), which is low in processability, and thus may reduce productivity in producing floorings using the polylactic acid.

Fourth, polylactic acid is difficult to apply to flooring because of the narrow operating temperature range (20 ~ 35 ℃), it tends to be excessively hardened outside the above operating temperature range, that is, below 20 ℃, especially in winter It may be damaged, tends to lose elasticity at 35 ° C. or more and soften excessively, and the physical properties required as the flooring material may be drastically lowered, thereby losing the function as the flooring material.

Therefore, the elastic layer 90 'used in the present invention is a mixture ratio (weight ratio) of the acrylic elastomeric resin and the polylactic acid is 100: 1-1: 100, preferably 95: 5-50: 50, more preferably 90 It is formed of a composite resin mixed with 10: 60: 40, and has the characteristics of providing elasticity, flexibility and sound insulation as compared with the case where polylactic acid is used alone. It is possible to obtain an elastic layer excellent in elasticity, flexibility, and sound insulation within the above-mentioned range of use, and particularly useful for producing flooring materials.

When the acrylic elastomeric resin content is less than the above range, the disadvantages of using the polylactic acid as a flooring material as described above, that is, the problem of low dimensional stability, high temperature blocking, narrow processing temperature range and use temperature range It is not desirable because it may not be enough to solve.

In the present invention, the elastic layer 90 'includes a composite resin including an acrylic elastic resin and a polylactic acid, thereby providing elasticity, flexibility, and sound insulation to the surface layer of the flooring material, and wear the surface treatment layer located on the surface layer. Therefore, even when the surface layer is exposed, there is an effect that the user is not exposed to harmful substances.

Since the cushion flooring material of the second embodiment of the present invention is the same as that described in the cushion flooring material of the first embodiment, except that a composite resin including acrylic elastic resin and polylactic acid is used as the elastic layer 90 ', the repeated substrate is Omit. That is, the type and characteristics of the acrylic elastic resin, the method of forming the elastic layer 90 ', and the like are the same as those of the cushion flooring material of the first embodiment.

The cushion flooring material of the present invention is excellent in elasticity, flexibility and sound insulation, and has a soft touch feeling due to the composite layer including the acrylic elastic resin and polylactic acid as the elastic layer 90 '.

On the other hand, the cushion flooring material of the first embodiment and the second embodiment may optionally further form a surface treatment layer 100 on the top layer.

That is, the surface treatment layer 100 may be stacked on top of the elastic layers 90 and 90 ', and the initial contamination prevention function, that is, to prevent the adhesion of contaminants to the surface of the cushion flooring material, scratch resistance and Functions to improve wear resistance. The surface treatment layer 100 may generally be formed by coating a coating solution in which a thermosetting or photocurable compound is dissolved in a solvent. However, in the case of a thermosetting compound, when applying heat to form a surface treatment layer, it is more preferable to use a photocurable compound, because the physical properties of the other layers, especially the elastic layer located below it by the heat can be changed. In this case, as the curable compound, monomers or oligomers having one or more functional groups such as an unsaturated bond group capable of crosslinking reaction may be used, such as urethane acrylate, epoxy acrylate, polyether acrylate, polyester acrylic Latex, dipentaacrythritol hexaacrylate, dipentacrytritol pentaacrylate, pentaacrylthiotol tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, and the like can be used, but these are exemplary. The present invention is not intended to be limited thereto. In this invention, these can be used individually or in mixture of 2 or more types as a photocurable compound. The coating solution including the photocurable compound generally includes a photopolymerization initiator in addition to the photocurable compound and the solvent. If necessary, various additives may be included in a range that does not change physical properties of the hard coating layer such as a light stabilizer and a leveling agent. It may be. The surface treatment layer has a surface hardness measured by the pencil hardness of 7H or more, the surface hardness of the surface of the plastic film may be excellent, and more preferably adjusted to be in the 7H to 8H range. The photocurable compound constituting the surface treatment layer may preferably be a conventional photocurable urethane acrylate.

In addition, the cushion flooring material of the first embodiment and the second embodiment may further form a transparent layer 80 between the printing layer 70 and the elastic layers 90, 90 '.

The transparent layer 80 may be made of polyvinyl chloride (PVC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (polyethylene) , PE), poly methyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), polycarbonate (PC), styrene-acrylonitrile copolymer ( styrene-acrylonitrile copolymer, SAN) may be a film made of a resin selected from one. It is preferable to use the transparent polyvinyl chloride or the transparent polyethylene terephthalate film which is excellent in transparency.

The transparent layer 80 may be applied together with the elastic layers 90 and 90 'to reduce the thickness of the elastic layers 90 and 90'. This can reduce the cost by reducing the amount of acrylic elastomeric resin that is relatively expensive compared to PVC or PET, which is the material of the transparent layer 80, whereby the entire transparent layer formed on the printed layer is made of an elastic layer Compared to the above, the manufacturing cost can be lowered, but the function and appearance can achieve the same or similar effects.

In addition, the cushion flooring material of the first and second embodiments may optionally further form an interlayer 30 between the cushion layer 20 and the dimensionally stable layer 40.

The interlayer 30 functions to improve the adhesion between the dimensional stability layer 40 and the cushion layer 20. Here, preferably, the composition of the interleave layer 30 is based on 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700 and as a plasticizer, dioctylterephthalate (DOTP) or dioctylphthalate (DOP) 30 to 30. 85 parts by weight, 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 barium-zinc-based heat stabilizer.

The interlayer 30 may be manufactured using calender molding, casting molding, blow molding, extrusion molding, or the like.

In addition, the cushion flooring material of the first and second embodiments may optionally form a balance layer 10 on the lowermost layer.

The balance layer 10 serves to hold the overall curling balance of the upper and lower portions of the flooring material. The balance layer 10 may be configured to include polyvinyl chloride and a filler (ie, calcium carbonate) having the same composition as the cushion layer 20. Here, preferably, the balance layer 10 is composed of dioctyl terephthalate (DOTP) or dioctylphthalate (DOP) as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a polymerization degree of 1000 to 1700. 100 parts by weight, 1 to 3 parts by weight of epoxidized soybean oil (ESO), 2 to 6 parts by weight of barium-zinc-based heat stabilizer, and 1 to 150 parts by weight of calcium carbonate.

The balance layer 10 may be manufactured using calender molding, casting molding, blow molding, extrusion molding, or the like.

Hereinafter, the configurations of the first and second embodiments include all of the optional configurations described above, that is, the surface treatment layer 100, the transparent layer 80, the interlayer 30, and the balance layer 10. A specific Example is described.

Figure 3 shows a third embodiment of the cushion flooring of the present invention, sequentially from the bottom to the top, the balance layer 10; Cushion layer 20; Interlayer 30; Dimensionally stable layer 40; Stop layer 50; Colored layer 60; Printed layer 70; Transparent layer 80; Elastic layers 90 and 90 '; The cushion flooring material is laminated in the order of the surface treatment layer 100.

In the case of the cushion flooring material having such a layer structure, the cushion flooring material preferably has the balance layer 10 of 0.1 to 0.2 mm, the cushion layer 20 of 0.3 to 3.0 mm (the thickness before foaming), and the interlayer paper. The layer 30 is 0.05 to 0.60 mm, the dimensionally stable layer 40 is 0.32 to 0.38 mm, the stop layer 50 is 0.1 to 0.5 mm, the colored layer 60 is 0.1 to 0.2 mm, and the transparent layer ( 80 is 0.1 to 0.7 mm, the elastic layer 90 (90 ') is 0.1 to 0.2 mm and the surface treatment layer 100 may have a thickness within the range of 20 to 40 ㎛, consisting of these layers The cushion flooring material may be adjusted to have a total thickness of about 6.0 mm.

Preferably, the printing layer 70 is an ink layer formed by transfer printing on the dimensionally stable layer 40, specifically, the thickness is formed so thin that it is difficult to measure the thickness of the cushion flooring material obtained in accordance with the present invention The thickness is so thin that it does not affect the total thickness of the film. Alternatively, the film or paper on which the printed pattern is printed may be selectively laminated.

In the above configuration, the balance layer 10 and the transparent layer 80 may be omitted. However, when the transparent layer 80 is omitted, it is preferable that the elastic layers 90 and 90 'are thicker, and in this case, the thickness of the elastic layers 90 and 90' is 0.2 to 1.0 mm. It can be within the range of.

In the cushion flooring material of the present invention, an elastic layer is applied as the surface layer constituting the cushion flooring material, and even when the surface treatment layer located on the upper surface layer is worn and the surface layer is exposed, the elastic layer constituting the surface layer is made of acrylic elastomeric resin or It is composed of acrylic resin and composite resin containing polylactic acid (PLA) which is eco-friendly, biodegradable and does not require toxic plasticizer, so it is effective to provide non-toxic and eco-friendly cushion flooring material to prevent users from being exposed to harmful substances. In particular, the appearance is beautiful and, by providing a variety of functions, in particular sound insulation and cushioning has the advantage of preventing the inter-layer noise.

In addition, the structure of the cushion flooring material, including a stop layer laminated on the upper surface of the dimensional stability layer has the effect of reinforcing the surface pressing strength of the cushion flooring material.

In addition, the structure of the cushion flooring material may include a colored layer stacked below the printing layer to assist the printing layer to form a background color as a background of a pattern formed on the printing layer.

Referring to summarize the manufacturing method of the cushion flooring material of the present invention as described above are as follows.

Each layer constituting the cushion flooring material of the present invention may be manufactured using calender molding, casting molding, blow molding, or extrusion molding except for the printing layer 70 and the dimensional stability layer 40. have.

Calender molding is a molding method in which sheets or films are continuously produced by rolling a raw material between two or more rolls rotating in opposite directions, and casting molding is a multilayer of synthetic resin sol on a release paper having excellent heat resistance that is easy to peel off. It is a method of forming and laminating after coating.Blow molding is closed by inserting one or two parasons continuously extruded into a tube form from an extruder by heating and melting thermoplastic resin, closing the upper and lower parts, and then closing the upper and lower parasons in the mandrel. When the air is blown in and expanded, the flyson is a molding method of making a hollow container product by bringing it into close contact with the inner wall of the mold. Extrusion molding is carried out by heating and melting thermoplastic material using an extruder on the surface of the substrate to make it flow. It is the shaping | molding method which crimps continuously at the same time as extrusion into a film form.

Preferably, in the case of calender molding, it is possible to freely control the content of components such as additives as compared to other manufacturing methods, thereby providing a flooring material having excellent flexibility, impact resistance, mechanical strength, processability, seating property and melting efficiency. It can be provided, and further reduce the raw material costs, it is preferable to manufacture using a calender molding method.

Each of the plurality of layers thus prepared is first laminated (primary laminated) with the balance layer 10 (optionally applicable), the cushion layer 20 and the interlayer 30 (optionally applicable) from below. , Foam molding in oven.

In addition, impregnated with a glass fiber nonwoven fabric in a PVC sol to prepare a dimensional stability layer 40 formed by gelling (gelling) is completed.

In addition, a film on which the printed layer 70 is formed or a printed pattern is printed by applying a pattern on the prepared colored layer 60 through a conventional printing method, for example, gravure, screen, or transfer printing. Alternatively, the printed layer 70 is formed by laminating paper.

Then, the stop layer 50, the colored layer 60, the printed layer 70, the transparent layer 80, and the elastic layers 90 and 90 'are sequentially positioned on the dimensional stability layer 40 from bottom to top. After lamination or lamination, the lamination (secondary lamination) is performed without the transparent layer 80.

After laminating the layers constituting the upper and lower portions of the flooring independently, the dimensional stabilization layer 40 is brought into contact with the interlayer 30 and then laminated together (third lamination).

After the plurality of layers are laminated into one, it is cooled, and optionally, a coating liquid is coated on the upper surfaces of the elastic layers 90 and 90 ', and preferably, the coating liquid in which the photocurable compound is dissolved in a solvent, Ultraviolet rays are cured by irradiation to form the surface treatment layer 100, thereby obtaining a cushion flooring material as a final product.

Hereinafter, preferred examples are provided to help the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and various changes and modifications within the scope and spirit of the present invention are apparent to those skilled in the art. It goes without saying that changes and modifications belong to the appended claims.

EXAMPLE

Example 1

Balance layer 10, cushion layer 20, interlayer 30, dimensional stability layer 40, stop layer 50, colored layer 60, printed layer 70, transparent layer in order from bottom to top (80), the elastic layer 90 'and the surface treatment layer 100 in the order of lamination, the transparent layer 80 is a transparent PVC film, the elastic layer 90' is an acrylic elastomer resin and polylactic acid Cushioned flooring material according to the present invention by using a composite resin mixed with 90 to 10 (weight ratio) of 1 to 10 parts by weight of PE wax with a lubricant based on 100 parts by weight of the composite resin. 1) was prepared to have a total thickness of 6.0 mm (see FIG. 3).

Example 2

Except for using a transparent layer in Example 1, it was carried out in the same manner as in Example 1 except that the elastic layer 90 'is made of a thickness of 0.5mm.

Comparative Example 1

Except for including the transparent layer 80 instead of the transparent layer 80 and the elastic layer 90 'in Example 1 was carried out in the same manner as in Example 1 to obtain a flooring.

Experimental Example 1

The amount of TVOC (total volatile organic compound) emission of the flooring material of Comparative Example 1 in which the cushion flooring material and the transparent layer 80 of Examples 1 and 2 constitute the surface layer was compared and the results are shown in Table 1 below.

The method of measuring TVOC emission amount was performed by the Ministry of Environment's Notice No. 2010-24, Small Chamber Method based on the Indoor Air Quality Process Test, which was used as a test material in a small chamber with a volume of 20 L connected to a mass spectrometer / high performance liquid chromatography (MS / HPLC). The test was performed by measuring the TVOC in the air by adding the flooring specimen and allowing the TVOC discharged from the specimen to be collected by the small chamber and directly introduced into the mass spectrometer / high performance liquid chromatography. As a condition of flooring in actual living environment, the temperature was ambient temperature (about 25 ° C), and the specimens of the Examples and Comparative Examples were tested at the same temperature for the same time to compare TVOC emissions under the same conditions. To make it possible.

division TVOC (mg / ㎡ / h) How to measure Comparative Example 1 0.327 Indoor air quality
Process test standard
Small Chamber Method Example 1 0.065 Example 2 0.052

As shown in Table 1, the cushion flooring material according to the present invention (Examples 1 and 2) it can be seen that the total amount of volatile organic compounds released compared to Comparative Example 1.

Experimental Example 2

Test data comparing the sound insulation performance of Examples 1 and 2 and Comparative Example 1 is shown in Table 2 below. Sound insulation performance test was measured according to KS F 2810-1 (light impact test conditions). The control group targets the bottom without the flooring, Comparative Example 1 is to install the flooring material of Comparative Example 1 on the bottom of the control group, and Examples 1 and 2 Example 1 on the bottom of the control group , 2 were installed.

division Sound insulation performance How to measure Measures Attenuation Control 78 - KS F 2810-2
(Light impact sound) Comparative Example 1 56 Δ22 Example 1 52 Δ26 Example 2 51 Δ27

As shown in Table 2, the cushion flooring material according to the present invention can be confirmed that the sound insulation performance is improved compared to Comparative Example 1.

1: cushion flooring material of the present invention
10: balance layer 20: cushion layer
30: interlayer 40: dimensionally stable layer
50: stop layer 60: colored layer
70: printed layer 80: transparent layer
90, 90 ': elastic layer 100: surface treatment layer

Claims (25)

Sequentially from bottom to top, the cushion layer; Dimensionally stable layer; Stop layer; Colored layer; Printed layer; And an elastic layer; wherein the elastic layer is a cushion flooring material comprising an acrylic elastic resin,
The acrylic elastomeric resin is a block copolymer of the polymer of the alkyl methacrylate monomer constituting the hard segment and the polymer of the alkyl acrylate monomer constituting the soft segment,
The block copolymer is a cushion flooring material having a hard segment: soft segment has a mixing ratio within the range of 20 to 40: 80 to 60% by weight. Sequentially from bottom to top, the cushion layer; Dimensionally stable layer; Stop layer; Colored layer; Printed layer; And an elastic layer; wherein the elastic layer is a cushion flooring material including a composite resin including an acrylic elastic resin and a polylactic acid,
The acrylic elastomeric resin is a block copolymer of the polymer of the alkyl methacrylate monomer constituting the hard segment and the polymer of the alkyl acrylate monomer constituting the soft segment,
The block copolymer is a cushion flooring material having a hard segment: soft segment has a mixing ratio within the range of 20 to 40: 80 to 60% by weight. delete delete delete The method according to claim 1 or 2,
The hard segment has a glass transition temperature in the range of 80 to 120 ℃, the soft segment has a glass transition temperature in the range of -60 to -20 ℃. The method according to claim 1 or 2,
The alkyl methacrylate monomer constituting the hard segment may be methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate. , Pentyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, cyclohexyl methacrylate Cushioned flooring, characterized in that at least one member selected from the group consisting of. The method according to claim 1 or 2,
The alkyl methacrylate monomer is a cushion flooring, characterized in that methyl methacrylate. The method according to claim 1 or 2,
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 acryl Cushion flooring material, characterized in that at least one selected from the group consisting of late, 2-ethylhexyl acrylate, heptyl acrylate, octyl acrylate, cyclopentyl acrylate, 3-vinyl cyclohexyl acrylate, cyclohexyl acrylate. The method according to claim 1 or 2,
The alkyl acrylate monomer is a cushion flooring, characterized in that n-butyl acrylate. delete The method according to claim 1 or 2,
The cushion layer is a cushion flooring, characterized in that the foam layer. The method according to claim 1 or 2,
The dimensionally stable layer is a glass fiber (glass fiber) impregnated with a PVC sol,
The stop layer and the colored layer include polyvinyl chloride and a filler,
The printing layer is a cushion flooring material, characterized in that the transfer layer, gravure printing or screen-printed ink layer or a printed pattern printed film or paper. delete delete delete delete The method according to claim 1 or 2,
The cushion flooring material further comprises a surface treatment layer formed by coating a coating liquid in which a thermosetting or photocurable compound is dissolved in a solvent on the elastic layer. delete The method according to claim 1 or 2,
The cushion flooring material further comprises a transparent layer which is a transparent PVC film or a transparent PET film formed between the printing layer and the elastic layer. delete The method according to claim 1 or 2,
The cushion flooring material is formed between the cushion layer and the dimensionally stable layer further comprises an interlayer comprising polyvinyl chloride and a filler to improve adhesion. delete The method according to claim 1 or 2,
The cushion flooring material further comprises a balance layer comprising a polyvinyl chloride and a filler formed under the cushioning layer. delete

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