KR20110103806A - Cushion flooring material using polylactic acid resin with water-resisting quality - Google Patents

Cushion flooring material using polylactic acid resin with water-resisting quality Download PDF

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KR20110103806A
KR20110103806A KR1020100023047A KR20100023047A KR20110103806A KR 20110103806 A KR20110103806 A KR 20110103806A KR 1020100023047 A KR1020100023047 A KR 1020100023047A KR 20100023047 A KR20100023047 A KR 20100023047A KR 20110103806 A KR20110103806 A KR 20110103806A
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South Korea
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layer
pla
weight
parts
flooring
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KR1020100023047A
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Korean (ko)
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KR101382809B1 (en
Inventor
강창원
권준혁
권현종
김장기
김지영
박귀봉
박상선
이경민
황승철
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(주)엘지하우시스
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/02Flooring or floor layers composed of a number of similar elements
    • E04F15/10Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
    • E04F15/107Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials composed of several layers, e.g. sandwich panels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/732Dimensional properties
    • B32B2307/734Dimensional stability

Abstract

Regarding a flooring having a laminated structure, more specifically, PLA (polylactic acid) resin is applied to the at least one layer constituting the flooring as a binder, with a foam layer to improve the buffer and noise prevention effect Disclosed is the flooring.
The present invention includes a transparent layer, a printing layer, and a foaming layer from above, wherein the transparent layer and the printing layer comprise a polyacryl acid (PLA) resin, a nonphthalate plasticizer, and an acrylic copolymer as a melt strength enhancer as a binder. It provides a PLA flooring comprising the.

Description

PLA flooring with foam layer {CUSHION FLOORING MATERIAL USING POLYLACTIC ACID RESIN WITH water-resisting quality}

The present invention relates to a flooring having a laminated structure, and more particularly, to apply a PLA (polylactic acid) resin as a binder to at least one layer constituting the flooring, and with the foam layer to provide a buffering and noise prevention effect The improved PLA flooring.

Floor materials used in buildings such as houses, apartments, apartments, offices or stores are mainly used for flooring based on petroleum resin such as polyvinyl chloride (PVC).

The flooring material using said polyvinyl chloride etc. is manufactured by extrusion or a calendering method etc. using resin, such as polyvinyl chloride (PVC). However, since the raw material of polyvinyl chloride resin is based on petroleum resources, there may be a big problem in the supply and demand of raw materials in the future due to exhaustion of petroleum resources.

In addition, polyvinyl chloride (PVC) -based flooring is generated in a number of harmful substances during use or disposal, it is necessary to be avoided in terms of environmentally friendly.

In addition, when the entire floor of the flooring material consisting of a non-foamed layer, there was a problem that the shock absorption is insufficient.

An object of the present invention is to provide a PLA flooring material that can achieve an environmentally friendly flooring material using at least one layer of PLA resin as a binder, and having a foam layer to ensure buffering and sound absorption.

The present invention includes a transparent layer, a printing layer, and a foaming layer from above, wherein the transparent layer and the printing layer comprise a polyacryl acid (PLA) resin, a nonphthalate plasticizer, and an acrylic copolymer as a melt strength enhancer as a binder. It provides a PLA flooring comprising the.

The flooring may further include a dimensionally stable layer in the middle.

In addition, a surface treatment layer and an easy layer can be selectively removed as needed.

In addition, the present invention includes a surface treatment layer, an upper layer and a foam layer from above, wherein the upper layer and the foam layer are PLA (Polylactic acid) resin as a binder, non-phthalate plasticizer, acrylic airborne as a melt strength enhancer (melt strength enhancer) It provides a PLA flooring comprising the coalescence.

A dimensional stability layer may be further included in the middle of the flooring material.

The upper layer may be used in one or more layers selectively in a transparent layer, an opaque layer, a chip inlay layer in a non-foamed form.

PLA flooring including a foam layer according to the present invention can implement an eco-friendly flooring by using a plant (based on poly lactic acid) resin as a binder.

In addition, the present invention can be implemented with an eco-friendly flooring having a cushioning and sound absorption by having a foam layer.

1 is a cross-sectional view showing a PLA flooring including a foam layer according to the first embodiment of the present invention,
Figure 2 is a cross-sectional view showing a PLA flooring including a foam layer according to a second embodiment of the present invention,
3 is a cross-sectional view showing a PLA flooring including a foam layer according to a third embodiment of the present invention,
4 is a cross-sectional view showing a PLA flooring including a foam layer according to a fourth embodiment of the present invention,
5 is a cross-sectional view showing a PLA flooring including a foam layer according to a fifth embodiment of the present invention,
6 is a cross-sectional view showing a PLA flooring including a foam layer according to a sixth embodiment of the present invention,
7 is a cross-sectional view showing a PLA flooring including a foam layer according to a seventh embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to PLA flooring including a foam layer according to the present invention.

1 to 4 show an example of a PLA flooring including a foam layer that can be applied to the present invention, Figure 1 is composed of a surface treatment layer 10, the upper layer 20 and the foam layer 40, Figure 2 further includes an easy layer 50 under the foam layer 40, FIG. 3 further includes a dimensionally stable layer 30 in the middle of the upper layer 20, and FIG. Further comprising a dimensionally stable layer 30 between the foam layer 40, Figure 5 further includes a dimensionally stable layer 30 in the middle of the foam layer 40, Figure 6 is a foam layer 40 and The dimensional stabilization layer 30 is further included between the easy layers 50, and FIG. 7 is a diagram illustrating the removal of the surface treatment layer 10.

In the present invention, at least one of the upper layer 20, the foam layer 40 and the easy layer 50 uses a PLA (Polylactic acid) resin as a binder, a non-phthalate plasticizer, as a melt strength enhancer (melt strength enhancer) And acrylic copolymers.

PLA resin is a thermoplastic polyester of lactide or lactic acid, and may be prepared by polymerizing lactic acid produced by fermenting starch extracted from renewable plant resources such as corn and potato. These PLA resins have significantly lower emissions of environmentally harmful substances such as CO 2 during use or disposal than petroleum-based materials such as polyvinyl chloride (PVC), and can be easily decomposed under the natural environment at the time of disposal. Has

PLA resin as described above can be generally divided into D-PLA, L-PLA, D, L-PLA or meso-PLA and the like, in the PLA resin applied to the present invention is not limited to the type of PLA resin, PLA resin can be manufactured individually or in mixture of 2 or more types.

Meanwhile, as described above, the PLA resin applied to the present invention may be prepared by polymerizing lactic acid or lactide, and if necessary, glycol compounds such as ethylene glycol or propylene glycol, and ethanedioic acid. Or hydroxycarboxylic acids such as dicarboxylic acid such as terephthalic acid, glycolic acid or 2-hydroxybenzoic acid; Alternatively, suitable copolymerization components such as lactones such as caprolactone or propiolactone may be further copolymerized.

Non-phthalate eco-friendly plasticizers facilitate molding at high temperatures by softening PLA resins to increase thermoplastics. In the present invention, ATBC (Acetyl tributyl citrate) may be used as the non-phthalate eco-friendly plasticizer, but is not limited thereto. The plasticizer may be used alone or in combination of two or more thereof.

In the case of the upper layer 20, the foam layer 40 and the easy layer 50, the plasticizer is preferably used in a ratio of 5 to 60 parts by weight based on 100 parts by weight of the PLA resin.

When the plasticizer is used in less than 5 parts by weight relative to 100 parts by weight of the PLA resin in each layer, the hardness of the PLA resin may be increased and workability may be reduced, and when the plasticizer is used in excess of a given ratio in each layer, Physical properties may be deteriorated due to a decrease in compatibility.

The acrylic copolymer used as a melt strength reinforcing agent serves to reinforce the strength of the PLA resin which is not good in impact resistance or heat resistance during melt extrusion. In addition, the acrylic copolymer enables the calendering and pressing of the PLA resin as a result of the experiment. The weight average molecular weight (Mw) of the acrylic copolymer is not particularly limited, but considering the improvement in melt strength and the like and compatibility with other materials during processing, it is preferable to use 800,000 to 6 million.

The acrylic copolymer may be used in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the upper layer 20, the foam layer 40 and the easy layer 50 in common. When the content of the acrylic copolymer is less than 0.1 parts by weight, the improvement of the melting efficiency and melt strength improvement efficiency of the PLA resin is insufficient. When the content of the acrylic copolymer exceeds 20 parts by weight, the manufacturing cost of each layer constituting the flooring is increased. The overall physical properties of each layer may be degraded due to compatibility problems with other materials constituting each layer.

The PLA resin may further include a lubricant to prevent accumulation of deposits or crosslinked materials in melt extrusion.

There are various types of such lubricants, but in the present invention, eco-friendly higher fatty acids are used as lubricants, and specifically, stearic acid, which is a saturated higher fatty acid having 18 carbon atoms, may be used.

The lubricant may be used in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the upper layer 20, the foam layer 40 and the easy layer 50 in common. If the amount of lubricant is less than 0.01 part by weight based on 100 parts by weight of the PLA resin, the effect of using lubricant is not obtained. If the amount of the lubricant is more than 10 parts by weight based on 100 parts by weight of the PLA resin, the impact resistance, heat resistance and gloss of the PLA resin are There is a problem that may degrade the degree.

In addition, the PLA resin may further be added to the chain extender (chain extender) to increase the molecular weight through the chain extension to improve the tensile strength, heat resistance and the like.

Such a chain extender may be a diisocyanate, a hydroxycarboxylic acid compound, or the like, but this is just one example, and various kinds of chain extenders currently used may be used without limitation.

The chain extender may be used in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the upper layer 20, the foam layer 40 and the easy layer 50 in common. If the amount of the chain extender used in the PLA resin is less than 0.01 part by weight based on 100 parts by weight of the PLA resin, the effect of using the chain extender cannot be obtained. The glossiness of the resin may be lowered.

In addition, in order to prevent mechanical properties such as impact resistance from being degraded through hydrolysis of the PLA resin, an anti-hydrolysis agent may be additionally added to the PLA resin. The hydrolysis agent can be used without limitation so long as it is usually used as a hydrolysis agent such as carbodiimide and oxazoline.

The hydrolysis agent is preferably added in the range of 10 parts by weight or less based on 100 parts by weight of the upper layer 20, the foam layer 40 and the easy layer 50 in common. When the hydrolysis agent exceeds 10 parts by weight relative to 100 parts by weight of the PLA resin, molding processability may be reduced.

In addition, when the PLA resin is applied to the upper layer 20, the foam layer 40 or the easy layer 50, each layer is a white pigment for the purpose of providing calcium carbonate (CaCO 3 ), or aesthetics, which is an inorganic filler for reinforcement. Titanium dioxide (TiO 2 ) may be further added.

In the case of calcium carbonate, the foam layer 40 is preferably used in an amount of 200 parts by weight or less relative to 100 parts by weight of the PLA resin, and an upper layer 20 and the easy layer 50 in an amount of 500 parts by weight or less relative to 100 parts by weight of the PLA resin. In addition, in the case of titanium dioxide, the upper layer 20, the foam layer 40 and the easy layer 50 are preferably used in an amount of 50 parts by weight or less based on 100 parts by weight of the PLA resin.

When calcium carbonate or titanium dioxide is used in excess of the above range, the binding force of other components may be lowered, thereby decreasing workability.

In addition, wood powder or rosin may be additionally added to the upper layer 20 and the easy layer 50 to provide a texture and natural wood aroma of natural wood.

Wood powder is preferably added in an amount of 200 parts by weight or less relative to 100 parts by weight of PLA resin, and in the case of rosin, it is preferably added in an amount of 20 parts by weight or less based on 100 parts by weight of PLA resin. The more wood powder and rosin are included, the more natural wood texture can be given. However, the binding strength of other components may be reduced, resulting in deterioration of physical properties such as workability.

As described above, one or more layers of the upper layer 20, the foam layer 40 and the easy layer 50 may be used including a PLA resin, a plasticizer and an acrylic copolymer as described above. In addition, the PLA resin may further include a lubricant, a chain extender, a hydrolysis agent and the like.

Hereinafter, each layer constituting the PLA flooring according to the present invention will be described.

In the present invention, the surface treatment layer 10 is formed on the upper layer 20 for the purpose of improving the surface quality such as scratch resistance and abrasion resistance of the flooring material, and to improve the stain resistance to facilitate cleaning. The surface treatment layer 10 may be used, such as polyurethane, urethane acrylate, wax. There are various methods for forming the surface treatment layer 10. For example, when urethane acrylate is used, the urethane acrylate UV curable composition may be applied on the upper layer 20 and cured through UV irradiation.

Such, the surface treatment layer 10 preferably has a thickness of 0.01 ~ 0.1 mm. When the surface treatment layer 10 is formed to a thickness of less than 0.01 mm, it is difficult to expect the effect of improving the physical properties such as scratch resistance, and when the surface treatment layer 10 exceeds 0.1 mm, excessive production in the surface treatment layer formation Cost is required and there is a problem that may lower the appearance quality of the flooring.

In the present invention, the upper layer 20 may be non-foamed, and may use one or more layers selectively in a transparent layer, an opaque layer, a print layer, and a chip inlay layer, and serves to form an exterior determining the interior property of the flooring material.

In the present invention, as described above, the upper layer 20 may use a PLA resin containing a plasticizer and an acrylic copolymer, and may further include a lubricant, a chain extender, a hydrolysis agent, and the like.

This upper layer 20 preferably has a thickness of 0.10 ~ 2.0 mm. If the transparent layer has a thickness of less than 0.10 mm, molding is difficult, and the durability due to wear is insufficient. On the other hand, if the thickness of the transparent layer exceeds 2.0 mm can cause a rise in the cost of manufacturing the flooring material without further effect increase.

In the present invention, the upper layer 20 may impart aesthetics of the flooring by forming a pattern in various ways such as gravure printing, screen printing, offset printing, rotary printing, or flexographic printing in the upper layer formed of a plurality of layers.

In the present invention, the dimensionally stable layer 30 serves to complement the low dimensional stability of the PLA resin. In the case of the flooring material using the PLA resin, the dimensions change due to the difference in temperature and humidity, and the phenomenon such as the connection between the flooring material may be opened due to the shrinkage, the dimensional stability layer 30 is secured such a dimensional stability This prevents such a phenomenon.

The dimensionally stable layer may be formed by impregnating the glass fiber with an acrylic resin, melamine resin or PLA resin having excellent transparency and moldability.

In this case, the glass fiber preferably has a mass per unit area of 30 ~ 150 g / m 2 . If the mass per unit area of the glass fiber is less than 30 g / m 2 , the dimensional stability reinforcing effect may be insufficient. If the mass per unit area of the glass fiber exceeds 150 g / m 2 , the upper layer 20 and the dimensional stability layer There is a problem that the adhesion between the 30 or the adhesion between the foam layer 40 and the dimensionally stable layer 30 may be lowered.

The dimensional stabilization layer 30 may be used alone or two kinds of ATBC, viscosity reducing agent, inorganic filler for reducing cost, calcium carbonate, white pigment titanium dioxide (TiO 2 ), etc. The above may be further included.

The materials added to the dimensionally stable layer 30 are preferably added in an amount of 40 to 150 parts by weight with respect to 100 parts by weight of the resin in the case of ATBC, 30 parts by weight or less for the viscosity reducing agent, 150 parts by weight or less for the calcium carbonate In the case of titanium dioxide, it is preferably added in an amount of 20 parts by weight or less.

In the case of ATBC, when the amount is less than 40 parts by weight compared to 100 parts by weight of the resin, the hardness of the glass fiber impregnated layer may be increased, and the processability may be lowered. May inhibit. In the case of a viscosity lowering agent, when it is added in excess of 30 parts by weight relative to 100 parts by weight of the resin, moldability may be reduced due to excessive viscosity decrease. In the case of calcium carbonate and titanium dioxide, when added in excess of the above range, the adhesive strength with other components may be lowered, thereby lowering the workability.

The dimensionally stable layer 30 preferably has a thickness of 0.20 ~ 1.0 mm. If the thickness of the dimensionally stable layer 30 is less than 0.2 mm, the dimensional stability effect may be insufficient. If the thickness of the dimensionally stable layer 30 exceeds 1.0 mm, a sufficient dimension stability effect may be obtained even with a thickness of 1.0 mm or less. Although thicker, the overall cost increases.

In the present invention, the foam layer 40 may be molded of PLA resin or other resin. When the foam layer 40 is molded from PLA resin, it is based on 100 parts by weight of PLA resin (or mixed resin of PLA resin and other resin), 20 parts by weight or less of processing aid, 25 parts by weight to 45 parts by weight of plasticizer and It may be prepared from a resin composition comprising 5 parts by weight to 60 parts by weight of a filler (ex. Calcium carbonate), in which case, the resin composition may include an appropriate amount of a blowing agent for a foaming process.

In the present invention, the easy layer 50 is a portion that is adhered to the bottom surface during construction, protects the back surface opposite to the flooring surface, and serves to give elasticity.

Such, easy layer 50 is 100 parts by weight of PLA resin, 5 to 60 parts by weight of non-phthalate plasticizer, 0.1 to 20 parts by weight of acrylic copolymer, 0.01 to 10 parts by weight of higher fatty acids as lubricant and 0.01 to 10 parts by weight of chain extender. It is preferable to include a part.

In addition, the easy layer 50 is 10 parts by weight or less of the hydrolysis agent, 500 parts by weight or less of calcium carbonate (CaCO 3 ), 200 parts by weight or less of wood powder, 50 parts by weight of titanium dioxide (TiO 2 ), based on 100 parts by weight of the PLA resin. And less than 20 parts by weight of rosin may be further included.

This easy layer 50 preferably has a thickness of 0.10 ~ 2.0 mm. If the thickness of the easy layer 50 is less than 0.10 mm, the back surface protection effect or moisture prevention effect of the flooring material does not appear well, and if the easy layer 50 exceeds 2.0 mm, the manufacturing cost may increase.

As described above, the PLA flooring according to the present invention is more environmentally friendly than the flooring using the polyvinyl chloride as a binder by using PLA resin as a binder, and has the advantage of ensuring sound insulation and cushioning performance, including a foam layer have.

Although the above description has been made with reference to the embodiments of the present invention, this is only an example, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention should be judged by the claims described below.

10: surface treatment layer
20: top layer
30: dimensionally stable layer
40: foam layer
50: easy layer

Claims (21)

  1. A surface treatment layer, an upper layer and a foam layer from above,
    The top layer or the foam layer is PLA flooring comprising a foam layer, characterized in that the composition is made of PLA resin
  2. The method of claim 1,
    It further comprises an easy layer on the foam layer,
    PLA flooring material comprising a foam layer, characterized in that one or more layers of the top layer, foam layer and easy layer is composed of PLA resin.
  3. A top layer and a foam layer from above,
    The top layer or the foam layer is PLA flooring comprising a foam layer, characterized in that the composition is made of PLA resin
  4. The method of claim 3,
    It further comprises an easy layer on the foam layer,
    PLA flooring material comprising a foam layer, characterized in that one or more layers of the top layer, foam layer and easy layer is composed of PLA resin.
  5. The method according to any one of claims 1 to 4,
    PLA flooring comprising a foam layer, characterized in that it further comprises a dimensionally stable layer.
  6. The method of claim 5,
    PLA flooring comprising a foam layer, characterized in that the dimensional stability layer is provided in the middle of the upper layer.
  7. The method of claim 5,
    PLA flooring comprising a foam layer, characterized in that a dimensionally stable layer is provided between the top layer and the foam layer.
  8. The method of claim 5,
    PLA flooring comprising a foam layer, characterized in that a dimensionally stable layer is provided in the middle of the foam layer.
  9. The method of claim 5,
    PLA flooring comprising a foam layer, characterized in that a dimensionally stable layer is provided between the foam layer and the easy layer.
  10. The method of claim 5,
    The dimensional stability layer is PLA flooring material comprising a foam layer, characterized in that the glass fiber is impregnated with any one of acrylic resin, melamine resin and PLA resin.
  11. The method of claim 10,
    The glass fiber is PLA flooring, characterized in that having a unit mass per area of 30 ~ 150 g / m 2 .
  12. The method of claim 10,
    The dimensionally stable layer is one or more of 40 to 150 parts by weight of a non-phthalate plasticizer, 30 parts by weight or less of viscosity reducing agent, 150 parts by weight or less of calcium carbonate and 20 parts by weight or less of titanium dioxide (TiO 2 ) to 100 parts by weight of the resin. PLA flooring further comprising a.
  13. The method of claim 5,
    The dimensional stability layer is PLA flooring, characterized in that having a thickness of 0.20 ~ 1.0 mm.
  14. The method according to any one of claims 1 to 4,
    The upper layer PLA flooring material comprising a foam layer, characterized in that it comprises an acrylic copolymer as a binder (Polylactic acid) resin, a non-phthalate plasticizer, a melt strength enhancer (melt strength enhancer) as a binder.
  15. The method of claim 14,
    The upper layer is one of 0.01 to 10 parts by weight of a higher fatty acid, 0.01 to 10 parts by weight of a chain extender and 10 parts by weight or less of an anti-hydrolysis agent as a lubricant, based on 100 parts by weight of the PLA resin. PLA flooring comprising a foam layer, characterized in that further comprising the above.
  16. The method of claim 14,
    The top layer PLA flooring comprising a foam layer, characterized in that having a thickness of 0.10 ~ 2.0 mm.
  17. The method according to any one of claims 1 to 4,
    The easy layer PLA flooring material, characterized in that it comprises 5 to 60 parts by weight of plasticizer and 0.1 to 20 parts by weight of a melt strength reinforcing agent with respect to 100 parts by weight of the PLA resin.
  18. The method of claim 17,
    The easy layer is 0.01 to 10 parts by weight of a higher fatty acid, 0.01 to 10 parts by weight of a chain extender, 10 parts by weight or less of a hydrolysis agent, 500 parts by weight or less of calcium carbonate, 200 parts by weight of wood powder, based on 100 parts by weight of the PLA resin. PLA flooring material comprising a foam layer, characterized in that it further comprises at least one, at least 50 parts by weight of titanium dioxide and 20 parts by weight of rosin.
  19. The method of claim 18,
    The easy layer PLA flooring comprising a foam layer, characterized in that having a thickness of 0.10 ~ 2.0 mm.
  20. The method according to claim 1 or 2,
    The surface treatment layer PLA flooring comprising a foam layer, characterized in that it comprises at least one of polyurethane, urethane acrylate and wax.
  21. The method of claim 20,
    PLA surface material comprising a foam layer, characterized in that the thickness of the surface treatment layer is 0.01 to 0.1mm.
KR1020100023047A 2010-03-15 2010-03-15 CUSHION FLOORING MATERIAL USING POLYLACTIC ACID RESIN WITH water-resisting quality KR101382809B1 (en)

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US9567757B2 (en) 2012-01-06 2017-02-14 Lg Hausys, Ltd. Laminated floor using poly lactic acid resin
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