KR20160011547A - Cushion flooing sheet and manufacturing method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning bottom material and a method of manufacturing the same, and more particularly, to a method of manufacturing a cushioning bottom material by applying an elastic layer containing an acrylic elastic resin or a composite resin including an acrylic- The present invention relates to a cushioning floor material which is non-toxic, environmentally friendly, and excellent in sound insulation performance by preventing the user from being exposed to harmful substances even when the surface treatment layer located on the surface layer is exposed and exposed.

Description

[0001] Cushion Flooring [0002] FIELD OF THE INVENTION [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning bottom material and a method of manufacturing the same, and more particularly, to a method of manufacturing a cushioning bottom material by applying an elastic layer containing an acrylic elastic resin or a composite resin including an acrylic- The present invention relates to a cushioning floor material which is non-toxic, environmentally friendly, and excellent in sound insulation performance by preventing the user from being exposed to harmful substances even when the surface treatment layer located on the surface layer is exposed and exposed.

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

Conventionally, a PVC material is mainly used as a flooring material previously filed by the Japanese Patent Application Laid-Open No. 10-2004-0065494. Specifically, conventional flooring materials are laminated from the bottom in the order of a balance layer, a cushion layer, a dimensionally stable layer, a print layer, a transparent PVC layer, and a surface treatment layer.

However, conventional flooring materials contain toxic phthalate plasticizers mainly due to the use of PVC materials, and release harmful substances such as environmental hormones and toxic gases (hydrogen chloride) There is a problem that a large environmental burden is caused.

Further, the surface layer is formed on the upper surface of the bottom material to prevent scratching and contamination. However, the surface treatment layer may be gradually worn away as time goes by. In this case, a transparent PVC layer Layer is exposed to the outside. When such a transparent PVC layer of PVC material is directly brought into contact with the human body, harmful substances emitted from the PVC material adversely affect the human body.

In addition, in recent years, the problem of interlayer noise in apartments has become a social problem, so that it is urgently required to develop a flooring material capable of minimizing the interlayer noise.

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

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a cushioning material for a cushioning material, which comprises an elastic layer containing an acrylic elastic resin, Which is excellent in sound insulation performance, and a method of manufacturing the same, which are not toxic, eco-friendly, and prevent the user from being exposed to harmful substances even when the surface treatment layer is exposed and the surface layer is exposed.

In order to solve the above problems, the present invention provides a cushioning pad comprising: a cushion layer; A printing layer; And an elastic layer, wherein the elastic layer comprises an acrylic elastic resin.

Further, the present invention provides a cushioning pad comprising: a cushion layer; A printing layer; And an elastic layer, wherein the elastic layer comprises an acrylic elastic resin and a composite resin containing polylactic acid.

Further, the present invention provides a cushioning pad comprising: a cushion layer; Dimensional stability layer; A printing layer; And an elastic layer, wherein the elastic layer comprises an acrylic elastic resin.

Further, the present invention provides a cushioning pad comprising: a cushion layer; Dimensional stability layer; A printing layer; Wherein the elastic layer comprises an acrylic elastic resin and a composite resin including polylactic acid.

Further, the present invention provides a cushioning pad comprising: a cushion layer; A printing layer; And an elastic layer,

(1) a cushion layer preparation step;

(2) a foaming step of foaming the cushion layer;

(3) a printing step of printing on the cushion layer or forming a printing layer by laminating a film or a paper on which a printed pattern is printed;

(4) an elastic layer forming step of forming an elastic layer with a resin composition comprising an acrylic elastic resin or a resin composition comprising an acrylic elastic resin and a polylactic acid; And

(5) a step of laminating the foamed cushion layer, the print layer, and the elastic layer together.

According to the present invention, even when an elastic layer is applied as a surface layer constituting the cushioning bottom material and the surface treatment layer positioned above the surface layer is worn and the surface layer is exposed, the elastic layer constituting the surface layer is made of acrylic elastic resin or acrylic elastic (EN) Provided is a nontoxic, environmentally friendly cushioning flooring which is composed of a resin and a composite resin including polylactic acid (PLA) which is a resin which does not require a toxic plasticizer and which is environmentally friendly, biodegradable and which is not exposed to harmful substances by a user. In particular, it is advantageous in terms of appearance and is capable of preventing the interlayer noise by imparting various functions, particularly sound insulation and cushioning.

1 is a sectional view schematically showing a first embodiment of a cushioning floor material according to the present invention.
2 is a cross-sectional view schematically showing a second embodiment of the cushioning floor material of the present invention.
3 is a cross-sectional view schematically showing a third embodiment of the cushioning floor material of the present invention.
4 is a cross-sectional view schematically showing a fourth embodiment of the cushioning floor material of the present invention.
5 is a cross-sectional view schematically showing a fifth embodiment of the cushioning floor material of the present invention.
6 is a cross-sectional view schematically showing a sixth embodiment of the cushioning floor material of the present invention.
7 is a cross-sectional view schematically showing a seventh embodiment of the cushioning floor material of the present invention.
8 is a cross-sectional view schematically showing an eighth embodiment of the cushioning floor material of the present invention.
Fig. 9 is a schematic diagram showing a manufacturing process of the cushioning floor material of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the cushioning bottom material of the first embodiment of the present invention includes a cushion layer 20; A printing layer 50; And an elastic layer (70), wherein the elastic layer (70) comprises an acrylic elastic resin.

In the present invention, the cushion layer 20 is made of a foamable synthetic resin and serves as a floor material to impart a certain degree of cushioning and absorb shocks. In addition, the cushion layer 20 functions to impart a sense of volume to the cushioning floor material.

The cushion layer 20 may be formed by optionally including a plurality of polyvinyl chloride, a pre-crosslinked acrylonitrile butadiene-vinyl chloride copolymer resin, a modified olefin resin, an ethylene vinyl acetate resin (EVA) or a thermoplastic urethane resin (TPU) . Preferably, the composition of the cushion layer 20 is 1 to 300 parts by weight of a pre-crosslinked acrylonitrile-butadiene-vinyl chloride copolymer resin, 100 parts by weight of a modified olefin resin From 5 to 100 parts by weight of an ethylene vinyl acetate resin (EVA) or a thermoplastic polyurethane resin (TPU), from 30 to 85 parts by weight of a plasticizer, from 1 to 5 parts by weight of a foam stabilizer and from 2 to 6 parts by weight of a foaming agent . The cushion layer 20 made of such a material is usually obtained by heat treatment through a heat treatment, preferably through a foaming oven. In the present invention, the printing layer 50 serves to impart various printing patterns to the obtained cushioning bottom material. Here, the print layer 14 may be formed by transfer printing, gravure printing, or screen printing on a layer to be printed, preferably by transfer printing. Alternatively, a film or paper on which a printed pattern is formed may be formed by laminating. Such a print layer imparts a pattern through printing, thereby providing a good appearance and a design effect with aesthetic sense.

In the present invention, the elastic layer 70 includes an acrylic elastic resin, imparts elasticity, flexibility and soundness to the surface layer of the bottom layer, and even when the surface layer disposed above the surface layer is worn to expose the surface layer, It does not expose to substance.

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

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

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

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

Here, it is preferable that the above-mentioned copolymer has a hard segment: soft segment in a ratio of 20 to 40: 80 to 60% by weight, preferably 25: 35: 75 to 65% Mechanical properties suitable for use as a raw material for the flooring, in particular abrasion resistance can be imparted.

The hard segment preferably has a glass transition temperature in the range of 80 to 120 占 폚 and the soft segment may preferably have a glass transition temperature in the range of -60 to -20 占 폚.

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

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

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

The cushioning flooring according to the present invention uses the acrylic elastic resin as the elastic layer 70, which is excellent in elasticity, flexibility and sound insulation, and has a soft touch feeling.

The elastic layer 70 may further include 1 to 5 parts by weight of an activator based on 100 parts by weight of the acrylic elastic resin. As the above-mentioned activator, hydrocarbon wax or a known commercialized higher fatty acid may be used which can be used for the production of a flooring material.

The elastic layer 70 may be manufactured by calender molding, casting molding, blow molding, extrusion molding, or the like. Calendering is a molding method in which a sheet or a film is continuously produced by rolling a raw material between two or more rolls rotating in mutually opposite directions. Casting molding is a method in which a synthetic resin sol is laminated on a release paper having excellent heat resistance, Coating, and then lamination. In blow molding, the thermoplastic resin is heated and melted, and the thermoplastic resin is continuously extruded into a tube from an extruder. The thermoplastic resin is inserted into one or two or more molds to seal the upper and the lower molds. A thermoplastic plastic material is heated and melted in an extruder to form a fluidized state on the surface of a base material, and then the thermoplastic plastic material is extruded from a T die And is extruded into a film form and simultaneously pressed.

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

The elastic layer 70 may be preferably transparent.

The transparent elastic layer is based on the fact that the acrylic elastic resin is a resin that can be processed into a transparent state. By using such a transparent elastic layer, And the like. In addition, the elastic layer 70 provides durability to the cushioning flooring according to the present invention and protects the printing layer 50 under the cushioning flooring.

2, the cushioning bottom material of the second embodiment of the present invention includes a cushion layer 20, A printing layer 50; And an elastic layer (70 '), wherein the elastic layer (70') comprises an acrylic elastic resin and a composite resin containing polylactic acid.

The construction of the cushion layer 20 and the print layer 50 is the same as that described in the first embodiment of the cushioning bottom material of the present invention, so that a detailed description thereof will be omitted.

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

When the elastic layer is composed of only poly (lactic acid), there may be some disadvantages as follows.

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

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

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

Fourth, polylactic acid is difficult to apply to flooring materials with a narrow temperature range (20 to 35 ° C), and tends to be excessively hardened when the temperature is out of the above range, that is, below 20 ° C. It tends to lose its elasticity at 35 DEG C or higher and become excessively softened. Thus, the physical properties required as a flooring material are rapidly lowered, and the function as a flooring material can be lost.

Therefore, the elastic layer 70 'used in the present invention preferably has a mixing ratio (weight ratio) of the acrylic elastic resin and poly (lactic acid) of 100: 1-1: 100, preferably 95: 5 - 30: 70, : 10 - 40: 60, which is characterized by imparting elasticity, flexibility and soundness compared to the case where polylactic acid is used alone. An elastic layer having excellent elasticity, flexibility and sound insulation within the above-mentioned range of use and particularly useful for the production of flooring can be obtained.

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

In the present invention, the elastic layer 70 'includes a composite resin including an acrylic elastic resin and poly (lactic acid), thereby imparting elasticity, flexibility and soundness to the surface layer of the bottom material, Thereby preventing the user from being exposed to harmful substances even when the surface layer is exposed.

The cushioning bottom material of the second embodiment of the present invention is the same as that described in the cushioning bottom material of the first embodiment except that acrylic elastic resin and polylactic acid-containing composite resin are used as the elastic layer 70 ' It is omitted. That is, the type and properties of the acrylic elastic resin and the method of forming the elastic layer 70 'are the same as those of the cushioning floor material of the first embodiment.

The cushioning flooring material of the present invention includes an acrylic elastic resin and a composite resin including polylactic acid as described above as the elastic layer 70 ', which is excellent in elasticity, flexibility and sound insulation, and has a soft touching effect.

 In addition, as shown in FIG. 3, the cushioning floor material of the third embodiment of the present invention includes a cushion layer 20; A dimension-stabilizing layer (40); A printing layer 50; And an elastic layer (70), wherein the elastic layer comprises an acrylic elastic resin.

The cushioning bottom material of the third embodiment of the present invention is the same as the cushioning bottom material of the first embodiment except that it further includes a dimensionally stabilizing layer 40 between the cushion layer 20 and the printing layer 50, It is omitted.

The dimensional stability layer 40 serves to reinforce dimensional stability of the cushioning bottom material. The dimensionally stable layer 40 is preferably made of a glass fiber impregnated with a PVC sol, preferably a glass fiber nonwoven fabric. In this case, the impregnation with the PVC sol can be understood as fixing the glass fiber and facilitating the lamination of the dimensionally stable layer with the printing layer or the cushion layer. Preferably, the PVC sol comprises 100 parts by weight of polyvinyl chloride having a polymerization degree of 1200 to 1700, 50 to 100 parts by weight of dioctylterephthalate (DOTP) or dioctylphthalate (DOP) as a plasticizer, 1 to 3 parts by weight of fumed 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 which is a white pigment.

Also, as shown in FIG. 4, the cushioning bottom material of the fourth embodiment of the present invention includes a cushion layer 20; A dimension-stabilizing layer (40); A printing layer 50; And an elastic layer 70 ', wherein the elastic layer 70' comprises a composite resin including an acrylic elastic resin and poly (lactic acid).

The cushioning flooring material of the fourth embodiment of the present invention is the same as the cushioning flooring material of the second embodiment except that it further includes a dimensionally stable layer 40 between the cushioning layer 20 and the printing layer 50, It is omitted.

The dimensional stability layer 40 serves to reinforce dimensional stability of the cushioning bottom material. The dimensionally stable layer 40 is preferably made of a glass fiber impregnated with a PVC sol, preferably a glass fiber nonwoven fabric. In this case, the impregnation with the PVC sol can be understood as fixing the glass fiber and facilitating the lamination of the dimensionally stable layer with the printing layer or the cushion layer. Preferably, the PVC sol comprises 100 parts by weight of polyvinyl chloride having a polymerization degree of 1200 to 1700, 50 to 100 parts by weight of dioctylterephthalate (DOTP) or dioctylphthalate (DOP) as a plasticizer, 1 to 3 parts by weight of fumed 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 which is a white pigment.

On the other hand, the cushioning floorings of the first to fourth embodiments may optionally further include a surface treatment layer 80 on the uppermost layer.

That is, the surface treatment layer 80 can be laminated on the elastic layer 70 or 70 ', and the surface of the cushioning bottom material can be prevented from having an initial pollution preventing function, that is, adhesion of contaminants, And has a function of improving abrasion resistance. The surface treatment layer 80 may 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, it is more preferable to use a photo-curable compound because heat can be applied to heat other layers to be located below the thermally curable compound, in particular, the elastic layer. In this case, the curable compound may be a monomer or oligomer having at least one functional group such as an unsaturated bond group capable of performing a crosslinking reaction, and examples thereof include urethane acrylate, epoxy acrylate, polyether acrylate, Dipentaerythritol pentaacrylate, dipentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, and the like can be used, and they are exemplified by And the present invention is not intended to be limited thereto. In the present invention, these can be used singly or as a mixture of two or more kinds of them as a photo-curable compound. The coating liquid containing the photo-curing compound generally contains a photopolymerization initiator in addition to the photo-curable compound and the solvent. If necessary, various additives may be added to the coating solution in the range of not changing the physical properties of the hard coating layer such as a light stabilizer and a leveling agent . The surface treatment layer has a surface hardness of 7H or more as measured by pencil hardness, and it may be a surface hardness of the surface of the plastic film being excellent, more preferably in a range of 7H to 8H. The photocurable compound constituting the surface treatment layer may preferably be a conventional photocurable urethane acrylate.

In addition, the cushioning bottom material of the first to fourth embodiments may further include a transparent layer 60 between the print layer 50 and the elastic layers 70 and 70 '.

The transparent layer 60 may be formed of polyvinyl chloride (PVC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene , PE), polymethyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), polycarbonate (PC), styrene-acrylonitrile copolymer styrene-acrylonitrile copolymer, SAN). It is preferable to use a transparent polyvinyl chloride or transparent polyethylene terephthalate film having excellent transparency.

The transparent layer 60 may be applied together with the elastic layers 70 and 70 'to reduce the thickness of the elastic layers 70 and 70'. This makes it possible to reduce the amount of the acryl-based elastic resin, which is relatively expensive, such as PVC or PET, which is a material of the transparent layer 60, to thereby reduce the cost, whereby the entire transparent layer formed on the print layer is made of an elastic layer It is possible to lower the manufacturing cost compared to the conventional method and to obtain the same or similar effect in terms of function and appearance.

In addition, the cushioning bottom material of the third and fourth embodiments may optionally further include a coloring layer 51 between the dimensionally stable layer 40 and the printing layer 50. The coloring layer 51 may function to assist the printing layer 50 to form a background color that becomes the background of the pattern formed on the printing layer 50. The colored layer 51 may be composed of polyvinyl chloride and a filler (i.e., calcium carbonate) having the same composition as that of the cushion layer 20, except that the colored layer 51 is not foamed. The composition of the colored layer 51 is preferably 30 to 100 parts by weight of dioctylterephthalate (DOTP) or dioctylphthalate (DOP) as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a degree of polymerization of 1000 to 1700, 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 coloring layer 51 may be formed by calendering, casting, or the like.

In addition, the cushioning bottom material of the third and fourth embodiments may optionally further comprise an intermediate layer 30 between the cushion layer 20 and the dimension-stabilizing layer 40.

The interlayer 30 functions to improve the adhesion between the dimensionally stable layer 40 and the cushion layer 20. Preferably, the composition of the interlayer 30 is 30-100 parts by weight of dioctylterephthalate (DOTP) or dioctylphthalate (DOP) as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a degree of polymerization 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 barium-zinc bond heat stabilizer. The interlayer 30 may be manufactured by calendering, casting, or the like.

In addition, the cushioning bottom material of the first to fourth embodiments may selectively form the 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 (i.e., calcium carbonate) having the same composition as the cushion layer 20. Therefore, the present invention is not particularly limited. Preferably, the balance layer 10 has a composition of DIOctylterephthalate (DOTP) or Dioctylphthalate (DOP) 30 to 100 parts by weight of polyvinyl chloride having a degree of polymerization 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-based heat stabilizer, and 1 to 150 parts by weight of calcium carbonate. The balance layer 10 may be manufactured by calendering, casting, or the like.

On the other hand, the cushioning bottom material of the first to fourth embodiments can selectively form the additional functional layer 11 in the lowermost layer.

The woven, knitted or nonwoven fabric may be a woven fabric woven from natural fibers, synthetic fibers or mixed fibers of these fibers, knitted fabric or needle punched And the appearance of the back surface (bottom surface) of the cushioning floor material can be enhanced to enhance the quality of the product, increase the market value, At the same time, improves the adhesion with the floor of the cushioning floor material, thereby facilitating the installation of the cushioning flooring material.

Hereinafter, the configurations of the first to fourth embodiments will be described with reference to the above-described selective configuration, that is, the surface treatment layer 80, the transparent layer 60, the colored layer 51, the interlayer film 30, 10 and the additional functional layer 11 is further included.

5 shows a fifth embodiment of the cushioning flooring according to the present invention, which comprises a balance layer 10, a cushion layer 20, a separable layer 30, a dimensional stability layer 40, The layer 50, the transparent layer 60, the elastic layers 70 and 70 ', and the surface treatment layer 80 are laminated in this order.

In the case of the cushioning floor material having such a layer structure, it is preferable that the balance layer 10 is 0.1 to 0.2 mm, the cushion layer 20 is 0.3 to 3.0 mm (thickness before foaming) The layer 30 is 0.05 to 0.60 mm, the dimension stabilizing layer 40 is 0.32 to 0.38 mm, the transparent layer 60 is 0.1 to 0.7 mm, the elastic layers 70 and 70 ' The surface treatment layer 80 may have a thickness within a range of 20 to 40 mu m, and the cushioning flooring made of such layers may be adjusted to have a total thickness of about 4.5 mm.

Preferably, the printing layer 50 is an ink layer formed by transfer printing on the dimension-stabilizing layer 40, and specifically, the thickness thereof is thin enough to be difficult to measure. Therefore, So that the thickness can be neglected. Alternatively, a film or paper on which a printed pattern is selectively printed may be laminated.

In addition, the balance layer 10 and the transparent layer 60 may be omitted in the above configuration. When the transparent layer 60 is omitted, it is preferable that the elastic layers 70 and 70 'are thicker. In this case, the thickness of the elastic layers 70 and 70' . ≪ / RTI >

6 shows a sixth embodiment of the cushioning floor according to the present invention. The cushioning flooring according to the sixth embodiment of the present invention comprises an additional functional layer 11, a cushion layer 20, a separable layer 30, a dimensional stability layer 40, The cushioning flooring laminated in the order of the printing layer 50, the transparent layer 60, the elastic layers 70 and 70 'and the surface treatment layer 80 is provided, and in the cushioning flooring of the fifth embodiment of FIG. 5, Except that the additional functional layer 11 is used instead of the additional functional layer 11. [

In the case of the cushion bottom material having such a layer structure, the cushion bottom material preferably has a thickness of 0.1 to 0.2 mm for the additional function layer 11, 0.3 to 3.0 mm (thickness before foaming) of the cushion layer 20, The thickness of the interlayer 30 is 0.05 to 0.60 mm, the dimension stabilizing layer 40 is 0.32 to 0.38 mm, the thickness of the transparent layer 60 is 0.1 to 0.7 mm, the elastic layers 70 and 70 ' The surface treatment layer 80 may have a thickness within a range of 20 to 40 mu m.

In addition, in the above configuration, the additional function layer 11 and the transparent layer 60 may be omitted. When the transparent layer 60 is omitted, it is preferable that the elastic layers 70 and 70 'are thicker. In this case, the thickness of the elastic layers 70 and 70' . ≪ / RTI >

7 shows a seventh embodiment of the cushioning flooring according to the present invention. The cushioning flooring comprises a balance layer 10, a cushion layer 20, a dimensional stability layer 40, a colored layer 51, A layer 50, a transparent layer 60, elastic layers 70 and 70 ', and a surface treatment layer 80 are laminated in this order.

In the case of the cushioning floor material having such a layer structure, it is preferable that the balance layer 10 is 0.1 to 0.2 mm, the cushion layer 20 is 0.3 to 3.0 mm (thickness before foaming) The thickness of the stabilizing layer 40 is 0.32 to 0.38 mm, the thickness of the colored layer 51 is 0.1 to 0.2 mm, the thickness of the transparent layer 60 is 0.1 to 0.7 mm, the elastic layers 70 and 70 ' The surface treatment layer 80 may have a thickness within a range of 20 to 40 mu m.

In addition, the balance layer 10 and the transparent layer 60 may be omitted in the above configuration. When the transparent layer 60 is omitted, it is preferable that the elastic layers 70 and 70 'are thicker. In this case, the thickness of the elastic layers 70 and 70' . ≪ / RTI >

8 shows the eighth embodiment of the cushioning flooring according to the present invention. The cushioning flooring according to the present invention comprises an additional functional layer 11, a cushion layer 20, a dimensional stability layer 40, a printing layer 50, The elastic layer 70, 70 'and the surface treatment layer 80 are laminated in this order.

However, the cushioning bottom material of the eighth embodiment is characterized in that the composition of the cushioning layer 20 does not contain a foaming agent, a foam stabilizer, and the like, and is made of a non-foamed cushioning bottom material.

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

In the case of the cushion bottom material having such a layer structure, the cushion bottom material preferably has a thickness of 0.1 to 0.2 mm for the additional function layer 11, 0.3 to 3.0 mm (thickness before foaming) of the cushion layer 20, The thickness of the dimension stabilizing layer 40 is from 0.32 to 0.38 mm, the thickness of the transparent layer 60 is from 0.1 to 0.7 mm, the elastic layer 70 or 70 'is from 0.1 to 0.2 mm and the surface treatment layer 80 is from 20 to 40 Lt; RTI ID = 0.0 > m. ≪ / RTI >

In addition, in the above configuration, the additional function layer 11 and the transparent layer 60 may be omitted. When the transparent layer 60 is omitted, it is preferable that the elastic layers 70 and 70 'are thicker. In this case, the thickness of the elastic layers 70 and 70' . ≪ / RTI >

In addition, the cushioning flooring of the present invention can be replaced with a PLA layer composed of poly (lactic acid) instead of the elastic layers 70 and 70 '. However, when polylactic acid alone is used as described above, low dimensional stability, There is a problem of a narrow working temperature range and a use temperature range, which is not preferable.

Further, the present invention provides a cushioning pad comprising: a cushion layer; A printing layer; And an elastic layer,

(1) preparing the cushion layer 20;

(2) foaming the cushion layer 20;

(3) a printing step of printing on the cushion layer 20 or forming a printing layer 50 by laminating a film or a paper printed with a printed pattern;

(4) an elastic layer forming step of forming an elastic layer (70, 70 ') with a resin composition containing an acrylic elastic resin or a resin composition comprising an acrylic elastic resin and a polylactic acid; And

(5) joining the foamed cushion layer 20 with the print layer 50 and the elastic layer 70, 70 ';

(Refer to Fig. 9). Fig.

The method for producing a cushioning flooring material of the present invention may further include a step of forming a dimensional stability layer to form a dimensional stability layer 40 composed of glass fiber impregnated with a PVC sol. In this case, in order to improve the adhesion between the dimension-stabilizing layer 40 and the cushion layer 20 before the foaming step, the interlayer 30 is prepared on the cushion layer 20, And the intermediate layer 30 can be joined together. When the dimension stabilizing layer 40 is formed, the printing layer 50 is formed by printing on a dimension-stable layer 40 other than the cushion layer 20, or by laminating a film or paper on which a printed pattern is printed.

Before the foaming step, a balance layer 10 made of a resin composition containing polyvinyl chloride and a filler is separately prepared and laminated with the cushion layer 20 or the cushion layer 20 and the interlayer 30 .

Alternatively, before the foaming step, the additional functional layer 11 made of woven fabric, knitted fabric, or nonwoven fabric may be prepared and joined to the cushion layer 20.

Also, before the printing step, a colored layer 51 composed of a resin composition containing polyvinyl chloride and a filler is separately prepared, and then the colored layer 51 is printed, or a film or paper on which a printed pattern is printed The printing layer 50 can be formed.

In the lapping step, a transparent layer 60 composed of a transparent PVC film or a PET film is further prepared so that the transparent layer 60 is positioned between the print layer 50 and the elastic layers 70 and 70 ' It may be a step of joining.

The method may further include a surface treatment step of coating the photocurable composition on the elastic layer after the lapping step and curing the photocurable composition by ultraviolet irradiation to form the surface treatment layer (80).

A detailed description of each layer and a detailed description of the manufacture of each layer can be understood to be the same as or similar to the foregoing, and thus a repeated description will be avoided.

The method of manufacturing the cushioning floor according to the present invention will be described in brief as follows.

Each of the layers constituting the cushioning flooring of the present invention may be manufactured by calendering molding, casting molding, blow molding or extrusion molding, except for the printing layer 50 and the dimensional stability layer 40 .

The plurality of layers thus produced are first applied from below to the optional layer 11 (optionally applicable), the balance layer 10 (optionally applicable), the cushion layer 20 and the interlayer 30 ), Followed by foam molding in an oven.

The upper surface of the dimensionally stable layer 40 formed by impregnating the glass fiber nonwoven fabric with the PVC sol and gelling is patterned by a normal printing method such as gravure, screen or transfer printing The printing layer 50 is formed, or the printing layer 50 is formed by laminating a film or a paper on which a printed pattern is printed. Alternatively, after the colored layer 51 is further formed on the dimensionally stable layer 40, the print layer 50 is formed by gravure, screen or transfer printing on the colored layer, Alternatively, the print layer 50 may be formed by laminating a film or a paper on which a printed pattern is printed.

At the same time, a transparent layer 60, preferably a transparent PVC film or a transparent PET film, is placed on the upper surface of the print layer 50, and the elastic layer 70 or 70 ' Or the elastic layers 70 and 70 'are laminated (secondarily joined) without the transparent layer 60.

After the layers constituting the upper and lower parts of the bottom material are independently laminated, the dimensionally stabilizing layer 40 is laminated on the interlayer 30 and joined together (third laminated).

When the plurality of layers are laminated together, they are cooled and optionally coated on the upper surface of the elastic layers 70 and 70 'using a coater, preferably a coating liquid in which the photo-curing compound is dissolved in a solvent And curing the surface treatment layer 80 by irradiating ultraviolet rays to obtain a cushion bottom as a final product.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Changes and modifications may fall within the scope of the appended claims.

[Example]

Example 1

The balance layer 10, the cushion layer 20, the interlayer 30, the dimensionally stabilizing layer 40, the print layer 50, the transparent layer 60, the elastic layer 70 'and the surface The transparent layer 60 was formed of a transparent PVC film and the elastic layer 70 'was formed by mixing the acrylic elastomer resin and the poly (lactic acid) in a weight ratio of 60:40 1 part by weight of PE wax as a lubricant based on 100 parts by weight of a composite resin and 100 parts by weight of the composite resin was used so that the cushioning flooring 1 according to the present invention had a total thickness of 4.5 mm 5).

Example 2

Example 1 was carried out in the same manner as in Example 1, except that the transparent layer was not used in Example 1, and the elastic layer was 0.5 mm thick.

Comparative Example 1

A flooring material was obtained in the same manner as in Example 1 except that only the transparent layer 60 was used in place of the transparent layer 60 and the elastic layer 70 'in Example 1.

Experimental Example 1

The total amount of TVOC (total volatile organic compound) emission of the conventional flooring material (Comparative Example 1) in which the transparent layer 60 that is commercialized with the cushioning floorings of Examples 1 and 2 constitutes the surface layer was compared and the results are shown in Table 1 Respectively.

The method for measuring the TVOC emission amount was carried out by the small chamber method based on the indoor air quality test standard of the Ministry of Environment notification No. 2010-24, which was used as a test material in a small chamber of 20 L volume connected to a mass spectrometer / high performance liquid chromatography (MS / HPLC) A sample of the bottom material was introduced and the TVOC emitted from the sample was collected by the small chamber and directly introduced into the mass spectrometer / high performance liquid chromatography, and the TVOC in the incoming air was measured. , The temperature was the ambient temperature (about 25 ° C), and the specimens of Examples and Comparative Examples were tested at the same temperature for the same period of time to compare the TVOC emission amounts under the same conditions objectively .

division TVOC (mg / m < 2 > / h) How to measure Comparative Example 1 0.376 Indoor air quality process test standard Small chamber method Example 1 0.083 Example 2 0.081

As shown in Table 1, it can be seen that the cushioning floor materials according to the present invention (Examples 1 and 2) have a lower total volatile organic compound emission amount than the flooring of the prior art (Comparative Example 1).

Experimental Example 2

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

division Sound insulation performance (dB) How to measure Measures Attenuation Control group 78 - KS F 2810-2
(Light impact sound) Comparative Example 1 62 Δ15 Example 1 53 Δ25 Example 2 53 Δ25

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

1: Cushion Flooring
10: Balance layer 11: Additional functional layer
20: cushion layer 30:
40: dimensional stability layer 50: printing layer
51: colored layer 60: transparent layer
70, 70 ': elastic layer 80: surface treatment layer

Claims (37)

Sequentially from the bottom to the top, a cushion layer; A printing layer; And an elastic layer, wherein the elastic layer comprises an acrylic elastic resin. Sequentially from the bottom to the top, a cushion layer; A printing layer; And an elastic layer, wherein the elastic layer comprises an acrylic elastic resin and a composite resin containing polylactic acid. Sequentially from the bottom to the top, a cushion layer; Dimensional stability layer; A printing layer; Wherein the elastic layer comprises an acrylic elastic resin. Sequentially from the bottom to the top, a cushion layer; Dimensional stability layer; A printing layer; Wherein the elastic layer comprises an acrylic elastic resin and a composite resin containing polylactic acid. 5. The method according to any one of claims 1 to 4,
Wherein the acrylic elastic resin is a copolymer of an alkyl acrylate monomer constituting a soft segment and a polymer of an alkyl methacrylate monomer constituting the hard segment. 6. The method of claim 5,
Wherein the copolymer is a copolymer or block copolymer of a core shell structure. 6. The method of claim 5,
Wherein the copolymer has a mixing ratio of hard segment: soft segment within the range of 20 to 40: 80 to 60% by weight. 6. The method of claim 5,
Wherein the hard segment has a glass transition temperature in the range of 80 to 120 占 폚 and the soft segment has a glass transition temperature in the range of -60 to -20 占 폚. 6. The method of claim 5,
The alkyl methacrylate monomer constituting the hard segment may be at least one selected from the group consisting of methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, , Pentyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, heptyl methacrylate, octyl methacrylate, cyclopentyl methacrylate, 3-vinylcyclohexyl methacrylate, cyclohexyl methacrylate Wherein the cushioning material is at least one selected from the group consisting of a cushioning material and a cushioning material. 10. The method of claim 9,
Wherein the alkyl methacrylate monomer is methyl methacrylate. 6. The method of claim 5,
The alkyl acrylate monomer constituting the soft segment may be at least one selected from the group consisting of methyl acrylate, ethyl acrylate, n-propyl acrylate, i-propyl acrylate, n-butyl acrylate, t-butyl acrylate, pentyl acrylate, Wherein the cushioning material is at least one selected from the group consisting of propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, propylene glycol, 12. The method of claim 11,
Wherein the alkyl acrylate monomer is n-butyl acrylate. 5. The method according to any one of claims 1 to 4,
Wherein the elastic layer further comprises 1 to 5 parts by weight of a lubricant based on 100 parts by weight of the acrylic elastic resin or 100 parts by weight of the composite resin. 5. The method according to any one of claims 1 to 4,
Wherein the cushion layer is a foamed layer or a non-foamed layer. 5. The method according to any one of claims 1 to 4,
Wherein the printing layer is an ink layer formed by transfer printing, gravure printing, or screen printing, or a film or paper printed with a printed pattern. The method according to claim 2 or 4,
Wherein the composite resin has a mixing ratio of an acrylic elastic resin and a poly (lactic acid) of 100: 1-1: 100. The method according to claim 3 or 4,
Wherein the dimensional stability layer is a glass fiber impregnated with a PVC sol. 5. The method according to any one of claims 1 to 4,
Wherein the cushioning bottom material further comprises a surface treatment layer formed on the elastic layer. 5. The method according to any one of claims 1 to 4,
Wherein the cushioning bottom material further comprises a transparent layer formed between the print layer and the elastic layer. 20. The method of claim 19,
Wherein the transparent layer is a transparent PVC film or a transparent PET film. The method according to claim 3 or 4,
Wherein the cushioning bottom material further comprises a colored layer formed between the dimensionally stable layer and the printing layer. 22. The method of claim 21,
Wherein the colored layer comprises polyvinyl chloride and a filler. The method according to claim 3 or 4,
And a separator layer formed between the cushion layer and the dimensionally stable layer to improve the adhesive strength. 24. The method of claim 23,
Characterized in that the separator layer comprises polyvinyl chloride and a filler. 5. The method according to any one of claims 1 to 4,
Wherein the cushioning bottom material further comprises an additional functional layer or a balance layer formed under the cushioning layer. 26. The method of claim 25,
Wherein the balance layer comprises polyvinyl chloride and a filler. 26. The method of claim 25,
Wherein the additional functional layer is a woven fabric, a knitted fabric, or a nonwoven fabric. Sequentially from the bottom to the top, a cushion layer; A printing layer; And an elastic layer,
(1) a cushion layer preparation step;
(2) a foaming step of foaming the cushion layer;
(3) a printing step of printing on the cushion layer or forming a printing layer by laminating a film or a paper on which a printed pattern is printed;
(4) an elastic layer forming step of forming an elastic layer with a resin composition comprising an acrylic elastic resin or a resin composition comprising an acrylic elastic resin and a polylactic acid; And
(5) joining the foamed cushion layer with the print layer and the elastic layer;
Wherein the cushioning material comprises a cushion material. 29. The method of claim 28,
Characterized in that the method further comprises a step of preparing a dimensionally stable layer comprising a glass fiber impregnated with a PVC sol. 30. The method of claim 29,
Wherein the printing step is a printing step of forming a printing layer by printing on the dimensionally stable layer or by laminating a film or paper on which a printed pattern is printed. 29. The method of claim 28,
Further comprising a surface treatment step of forming a surface treatment layer by curing the photocurable composition by coating a photocurable composition on the elastic layer after the lapping step and irradiating ultraviolet light thereto, Way. 30. The method of claim 29,
Further comprising the step of forming a separator layer on the cushion layer to improve the adhesion between the dimensionally stable layer and the cushion layer. 29. The method of claim 28,
The printing step includes:
Wherein the colored layer is separately formed from a resin composition comprising polyvinyl chloride and a filler and then printed on the colored layer or a printing layer is formed by laminating a film or a paper printed with a printed pattern. Gt; 29. The method of claim 28,
Wherein the lapping step is a step of preparing a transparent layer composed of a transparent PVC film or a PET film and laminating the transparent layer so as to be positioned between the cushion layer and the elastic layer. 29. The method of claim 28,
Wherein a balance layer made of a resin composition containing polyvinyl chloride and a filler is separately prepared before the foaming step and is joined to the cushion layer. 29. The method of claim 28,
Wherein an additional functional layer made of a woven fabric, a knitted fabric, or a nonwoven fabric is separately prepared before the foaming step and is joined to the cushion layer. Sequentially from the bottom to the top, a cushion layer; A printing layer; And a PLA layer.

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