KR101355740B1 - Polylactic acid resin flooring material improved processibility - Google Patents

Abstract

Disclosed is a PLA flooring material improved environmentally friendly processability.
PLA flooring material improved workability according to the present invention is a flooring material formed of one or more layers, PLA flooring material improved workability according to an embodiment flooring is formed of one or more layers, at least one layer of the flooring material is c -PLA (crystalline-Polylactic acid) / a-PLA (amorphous-Polylactic acid) blend resin (Blend Resin Layer), including the mixing ratio of the c-PLA: a-PLA in a weight ratio of more than 90:10 ~ 0: 100 The present invention relates to a less than.

Description

PLAA with improved processability {POLYLACTIC ACID RESIN FLOORING MATERIAL IMPROVED PROCESSIBILITY}

The present invention relates to a flooring, and more particularly, by using a crystalline-polylactic acid (c-PLA) / amorphous-polylactic acid (a-PLA) blend resin, supply and demand problems of raw materials due to depletion of petroleum resources It can solve the problem, and relates to a technology that can implement an eco-friendly flooring.

Background materials using petroleum resins such as polyvinyl chloride (PVC) are widely used as flooring materials in buildings such as houses, apartments, apartments, offices, and stores.

The flooring material as described above is produced by extrusion or calendering using a resin such as polyvinyl chloride (PVC). However, since the raw materials are obtained entirely from crude oil, which is a limited resource, it is expected that problems such as difficulty in supplying raw materials in the future will occur due to depletion of petroleum resources.

Further, polyvinyl chloride (PVC) -based flooring has a problem that it easily discharges harmful substances and burdens the environment even at the time of disposal even considering the recent interest in environmental problems.

An object of the present invention is to use a crystalline-polylactic acid (c-PLA) / amorphous-polylactic acid (a-PLA) blend resin (Blend Resin Layer) as a binder for the base layer, easy layer, etc. constituting the flooring material, By using eco-friendly plasticizers such as ATBC (Acetyl tributyl citrate), eco-friendly flooring material can be realized and by using acrylic copolymer as a melt strength enhancer, PLA flooring material with improved processability that can be calendered and pressed To provide.

PLA flooring is improved workability according to an embodiment of the present invention for achieving the above object is a flooring formed of one or more layers, at least one layer of the flooring comprises a c-PLA / a-PLA blend resin It is characterized by.

Here, the mixing ratio of the c-PLA: a-PLA is characterized in that the weight ratio of more than 90:10 ~ 0: less than 100.

In addition, the flooring is characterized in that it comprises a surface treatment layer, a transparent layer, a printing layer, a base layer and an easy layer from above.

In this case, the transparent layer comprises 5 to 50 parts by weight of a non-phthalate plasticizer, 0.1 to 20 parts by weight of a melt strength reinforcing agent with respect to 100 parts by weight of the c-PLA / a-PLA blend resin, the transparent layer is the c-PLA / At least 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, based on 100 parts by weight of a-PLA blend resin It characterized in that it further comprises.

Next, the printed layer comprises 5 to 60 parts by weight of a non-phthalate plasticizer and 0.1 to 20 parts by weight of a melt strength reinforcing agent based on 100 parts by weight of the c-PLA / a-PLA blend resin, and the print layer is the c 0.01 to 10 parts by weight of a higher fatty acid as a lubricant, 0.01 to 10 parts by weight of a chain extender, 10 parts by weight or less of a hydrolysis agent, and 100 parts by weight of calcium carbonate (CaCO ₃ ) based on 100 parts by weight of -PLA / a-PLA blend resin. And at least 50 parts by weight of titanium dioxide (TiO ₂ ) or less.

Next, the base layer includes 5 to 100 parts by weight of the non-phthalate plasticizer and 0.1 to 20 parts by weight of the melt strength reinforcing agent, based on 100 parts by weight of the c-PLA / a-PLA blend resin. Silver is 0.01 to 10 parts by weight of a higher fatty acid, 0.01 to 10 parts by weight of a chain extender, 30 parts by weight or less of a second plasticizer, and 10 parts by weight of a hydrolysis agent, based on 100 parts by weight of the c-PLA / a-PLA blend resin. Or less, 1,000 parts by weight or less of calcium carbonate (CaCO 3), 200 parts by weight or less of wood powder, 50 parts by weight or less of titanium dioxide (TiO 2), and 20 parts by weight or less of rosin.

Next, the easy layer comprises 5 to 60 parts by weight of a nonphthalate plasticizer and 0.1 to 20 parts by weight of a melt strength reinforcing agent based on 100 parts by weight of the c-PLA / a-PLA blend resin. 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, wood flour, to 100 parts by weight of the c-PLA / a-PLA blend resin Characterized in that it further comprises at least one of 200 parts by weight or less, 50 parts by weight or less of titanium dioxide and 20 parts by weight or less of rosin.

In addition, the PLA flooring having improved processability according to another embodiment of the present invention includes a surface treatment layer, a transparent layer, a printing layer, a base layer and an easy layer from above, and each of the transparent layer, the printed layer, the base layer, and the easy layer is a binder. And c-PLA / a-PLA blend resin, ATBC inphthalate plasticizer, acrylic copolymer as melt strength enhancer, higher fatty acids as lubricant and chain extender.

Here, the transparent layer is characterized in that the hydrolysis agent is further added, the printing layer is characterized in that one or more of the hydrolysis agent, calcium carbonate and titanium dioxide is further added, the base layer is moisture resistant It is characterized in that one or more of the release, calcium carbonate, wood flour, titanium dioxide and rosin are further added, and the easy layer is one or more of the hydrolysis agent, calcium carbonate, wood flour, titanium dioxide and rosin It features.

The PLA flooring material having improved processability according to the present invention uses PLA resin based on plant resources instead of petroleum based PVC, which is generally used as a binder, and by using c-PLA / a-PLA blend resin, The raw material supply and demand problem can be solved.

In addition, the flooring using the c-PLA / a-PLA blend resin according to the present invention is less environmentally hazardous substances such as CO ₂ during the production or lamination of each layer, such as the base layer, easy layer, easy to dispose of the environment-friendly There is an advantage.

In addition, the flooring using the c-PLA / a-PLA blend resin according to the present invention has the advantage of realizing the texture and unique wood fragrance of natural wood by applying wood powder and rosin to the base layer and easy layer.

In addition, the c-PLA / a-PLA blend resin applied to the present invention, as a result of using the acrylic copolymer as a melt strength enhancer, as well as melt extrusion and calendering or press processing of the PLA flooring was possible.

Figure 1 shows a cross-sectional view of the flooring using a c-PLA / a-PLA blend resin according to 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. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the improved PLA flooring workability according to the present invention.

1 is a cross-sectional view showing a flooring using a c-PLA / a-PLA blend resin according to the present invention.

Referring to FIG. 1, the PLA flooring having improved processability according to the present invention includes a surface treatment layer 110, a transparent layer 120, a print layer 130, a base layer 140, and an easy layer 150 from above. .

At this time, in the present invention, at least one of the transparent layer 120, the printed layer 130, the base layer 140 and the easy layer 150 is a c-PLA / a-PLA blend resin as a binder, a non-phthalate-based ATBC (Acetyl tributyl citrate) as a plasticizer and an acrylic copolymer as a melt strength enhancer.

Here, the PLA resin is a thermoplastic polyester of lactide or lactic acid, and may be prepared by polymerizing lactic acid prepared by fermenting starch extracted from corn, potato, and the like. Since the corn, potatoes and the like are a renewable plant resource, the PLA resin that can be obtained from them can effectively cope with problems caused by depletion of petroleum resources.

In addition, PLA resin has much lower emissions of environmentally harmful substances such as CO ₂ during use or disposal than petroleum-based materials such as polyvinyl chloride (PVC), and is environmentally friendly in that it can be easily decomposed in the natural environment even when disposed of. Has

PLA resin as described above is polycondensation lactic acid (LA) as a monomer (Monomer)

The polymer formed through coagulation and LA can be divided into LLA and DLA by its steric structure. When the content of LLA or DLA is less than 12% in the LA forming PLA, the corresponding PLA shows crystallinity, whereas the content of LLA or DLA is amorphous when the content of LLA or DLA is 12% or more. In the present invention, it is preferable to blend c-PLA and a-PLA.

Complementary action of c-PLA and a-PLA can suppress the bleeding of plasticizer, increase the heat storage effect during the process, and facilitate the calendering process. have.

Meanwhile, the c-PLA / a-PLA blend resin used in the present invention may be prepared by polymerizing lactic acid or lactide, as described above, and, if necessary, lactic acid or lactide and ethylene glycol or propylene glycol. Copolymerization with appropriate monomers such as glycol compounds, such as ethanedioic acid or dicarboxylic acid such as terephthalic acid, hydroxycarboxylic acid such as glycolic acid or 2-hydroxybenzoic acid, or lactones such as caprolactone or propiolactone May be

The mixing ratio of the c-PLA: a-PLA is preferably blended in a weight ratio of more than 90:10 to less than 0: 100. On the basis of c-PLA, when the weight ratio of c-PLA exceeds 90, the bleeding suppression and heat storage effect of the plasticizer may not be obtained, and thus, the calendering process may be difficult.

Next, the non-phthalate plasticizer softens the c-PLA / a-PLA blend resin to increase thermoplasticity, thereby facilitating molding at high temperatures at appropriate processing temperatures. In the present invention, an environmentally friendly plasticizer ATBC (Acetyl tributyl citrate) is used as the nonphthalate plasticizer.

In the case of the transparent layer 120, the non-phthalate plasticizer is preferably used at a ratio of 5 to 50 parts by weight based on 100 parts by weight of the c-PLA / a-PLA blend resin, and in the case of the print layer 130 and the easy layer 150. It is preferable to use it at the ratio of 5-60 weight part with respect to 100 weight part of C-PLA / A-PLA blend resin, and, in the case of the base layer 140, it is preferable to use it at the ratio of 5-100 weight part.

When the non-phthalate plasticizer is used at less than 5 parts by weight relative to 100 parts by weight of the c-PLA / a-PLA blend resin in each layer, the hardness of the c-PLA / a-PLA blend resin may be increased, resulting in deterioration of processability. When the non-phthalate plasticizer is used in excess of a given ratio in each layer, physical properties due to a decrease in compatibility with other components may be deteriorated.

The acrylic copolymer used as the melt strength enhancer reinforces the melt strength of the PLA resin to enable calendering and pressing. As the melt strength reinforcing agent applicable to the present invention, an acrylic copolymer or the like can be provided.

As the melt strength reinforcing agent, the acrylic copolymer has a transparent layer 120, a printing layer 130, a base layer 140 and an easy layer 150 in common with respect to 100 parts by weight of c-PLA / a-PLA blend resin 100 parts by weight It can be used in the ratio of a weight part. When the content of the acrylic copolymer as the melt strength enhancer is less than 0.1 part by weight, the improvement of the melting efficiency and the melt strength improvement efficiency of the c-PLA / a-PLA blend resin is insufficient, and the content of the acrylic copolymer as the melt strength enhancer is 20 parts by weight. If exceeded, the manufacturing cost of each layer constituting the flooring may increase, and the overall physical properties of each layer may be lowered due to compatibility problems with other materials constituting each layer.

The PLA resin may further include a lubricant to prevent the resin from adhering to the calender roll or the press during processing such as calendering, pressing.

Although there are various types of such lubricants, the present invention uses environmentally friendly higher fatty acids 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 c-PLA / a-PLA blend resin in common for the transparent layer 120, the print layer 130, the base layer 140, and the easy layer 150. If the amount of lubricant used in the c-PLA / a-PLA blend resin is less than 0.01 part by weight based on 100 parts by weight of the c-PLA / a-PLA blend resin, the lubricant use effect cannot be obtained, and the amount of the lubricant is used in c-PLA / a- If it exceeds 10 parts by weight relative to 100 parts by weight of the PLA blend resin, there is a problem that may deteriorate impact resistance, heat resistance, glossiness, etc. of the c-PLA / a-PLA blend resin.

In addition, a chain extender may be further added to the c-PLA / a-PLA blend resin in order to increase the molecular weight through chain extension to improve 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 c-PLA / a-PLA blend resin in common for the transparent layer 120, the print layer 130, the base layer 140, and the easy layer 150. have. If the amount of the chain extender used in the c-PLA / a-PLA blend resin is less than 0.01 part by weight based on 100 parts by weight of the c-PLA / a-PLA blend resin, the effect of using the chain extender may not be obtained. When the amount exceeds 10 parts by weight relative to 100 parts by weight of the c-PLA / a-PLA blend resin, the gloss of the c-PLA / a-PLA blend resin may be lowered.

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

Such a hydrolysis agent is in the range of 10 parts by weight or less based on 100 parts by weight of the transparent layer 120, the print layer 130, the base layer 140, and the easy layer 150 in common to the c-PLA / a-PLA blend resin. It is preferred to be added at. When the hydrolysis agent exceeds 10 parts by weight relative to 100 parts by weight of the c-PLA / a-PLA blend resin, molding processability may be deteriorated.

In addition, when the c-PLA / a-PLA blend resin is applied to the printing layer 130, the base layer 140 or the easy layer 150, each layer has a calcium carbonate (CaCO ₃ ) or aesthetics, which is an inorganic filler for reinforcement. Titanium dioxide (TiO ₂ ) may be further added as a white pigment for the purpose of provision.

In the case of calcium carbonate, 100 parts by weight or less based on 100 parts by weight of the c-PLA / a-PLA blend resin in the print layer 140, and 1,000 parts by weight in 100 parts by weight of the c-PLA / a-PLA blend resin in the base layer 140. Less than or equal to, easy layer 150 is preferably used in each of 500 parts by weight or less relative to 100 parts by weight of c-PLA / a-PLA blend resin. In addition, in the case of titanium dioxide, the printing layer 130, the base layer 140, and the easy layer 150 are preferably used in an amount of 50 parts by weight or less based on 100 parts by weight of the c-PLA / a-PLA blend resin.

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

In addition, wood powder or rosin may be additionally added to the base layer 140 or the easy layer 150 to impart the texture and natural wood fragrance of natural wood.

In the case of wood powder, it is preferable to be added to the base layer 140 and the easy layer 150 at 200 parts by weight or less relative to 100 parts by weight of the c-PLA / a-PLA blend resin, and in the case of rosin, the base layer 140 Common to the easy layer 150, it is preferably added to 20 parts by weight or less relative to 100 parts by weight of the c-PLA / a-PLA blend resin. In the case of wood flour and rosin, the more the texture is included in the base layer 140 and the easy layer 150, the more the texture of natural wood may be given.

As described above, one or more layers of the transparent layer 120, the printed layer 130, the base layer 140 and the easy layer 150 may be added with a synthetic resin to the c-PLA / a-PLA blend resin as described above As the nonphthalate plasticizer and the melt strength reinforcing agent, a sheet-like molded article including an acrylic copolymer can be used. In addition, the c-PLA / a-PLA blend resin may additionally include lubricants, chain extenders, hydrolysis agents, and the like.

In the PLA flooring material having improved processability according to the present invention, the transparent layer 120, the printing layer 130, the base layer 140 and the easy layer 150 are all made of c-PLA / a-PLA blend resin as a binder. Here, it can be presented that a non-phthalate plasticizer of ATBC, an acrylic copolymer as a melt strength enhancer, a higher fatty acid and a chain extender are added as a lubricant.

The most preferred example of the improved PLA flooring material according to the present invention is as follows.

The transparent layer 120 is most preferably added to the c-PLA / a-PLA blend resin, a non-phthalate plasticizer, melt strength enhancer, lubricant, chain extender and hydrolysis agent.

The printing layer 130 is most preferably a c-PLA / a-PLA blend resin is a synthetic resin, non-phthalate plasticizer, melt strength enhancer, lubricant, chain extender, hydrolysis agent, calcium carbonate and titanium dioxide added Do.

The base layer 140 and the easy layer 150 are most preferably containing a non-phthalate plasticizer, melt strength enhancer, lubricant, chain extender, hydrolysis agent, calcium carbonate, titanium dioxide, wood flour and rosin.

As described above, when the calendering method using the PLA resin composition according to the present invention is applied, a basic form of each layer may be obtained.

As such, the method of forming each layer structure using the PLA composition is not particularly limited. For example, it may be prepared by mixing each of the raw materials described above to produce a resin composition, a kneading step of uniformly gelling by heating and pressing the mixed raw materials under appropriate conditions, and calendering molding to the final sheet shape. have.

At this time, the mixing and kneading process of the raw material in the above, for example, a liquid or powdery raw material may be performed using a super mixer, an extruder, a kneader, two or three rolls and the like. Further, in the mixing and kneading step of the raw materials, the blended raw materials are kneaded at a temperature of about 120 to 200 DEG C using a Banbury mixer or the like, and the kneaded raw materials are heated to about 120 to 200 DEG C The mixing and kneading steps may be repeatedly carried out in multiple stages as in the case of primary and secondary mixing using a two-roll mill or the like at a temperature of 50 to 100 ° C.

 Meanwhile, the method of applying the raw materials mixed as described above to the car-rendering method to produce the above layers is also not particularly limited, and for example, it can be manufactured by using an ordinary apparatus such as an inverted L type 4-roll calender have.

The car rendering processing conditions described above can be appropriately selected in consideration of the composition of the resin composition to be used, and the car rendering processing can be performed within a processing temperature range of about 120 to 200 ° C.

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

In the present invention, the surface treatment layer 110 is formed on the transparent layer 120 for the purpose of improving the surface quality such as scratch resistance or wear resistance of the flooring material, and to improve the stain resistance to facilitate cleaning. The surface treatment layer 110 may be formed by applying a general UV curable composition, such as, for example, a urethane acrylate-based UV curable composition on the transparent layer 120, and curing through UV irradiation. Can be formed.

Such, the surface treatment layer 110 preferably has a thickness of 0.01 ~ 0.1 mm. If the surface treatment layer 110 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 if the surface treatment layer 110 exceeds 0.1 mm, excessive manufacture of the surface treatment layer Cost is required and there is a problem that can lower the appearance characteristics of the flooring.

In the present invention, the transparent layer is formed on the printed layer 130 to impart a three-dimensional effect, and serves to protect the pattern and the like formed on the printed layer 130.

In the present invention, as described above, the transparent layer 120 may use a c-PLA / a-PLA blend resin containing an acrylic copolymer as a non-phthalate plasticizer and a melt strength enhancer. Hydrolysing agents and the like.

The transparent layer 120 preferably has a thickness of 0.10 ~ 1.0 mm. If the transparent layer has a thickness of less than 0.10 mm, the pattern formed on the printed layer cannot be effectively protected and the three-dimensional effect is lowered. On the other hand, if the thickness of the transparent layer exceeds 1.0 mm, the effect of the flooring can be increased without increasing the effect.

In the present invention, the printing layer 130 is formed on the surface of the c-PLA / a-PLA blend resin or the like by forming a pattern in a variety of ways, such as transfer printing, gravure printing, screen printing, offset printing, rotary printing or flexographic printing It plays a role in contributing aesthetics.

As described above, the print layer 130 may use a c-PLA / a-PLA blend resin containing an acrylic copolymer as a non-phthalate plasticizer and a melt strength enhancer, and additionally, a lubricant, a chain extender, and an internal moisture. Release, calcium carbonate, titanium dioxide, or the like may be used alone or in addition of two or more thereof.

The printed layer 130 preferably has a thickness of 0.01 ~ 0.3 mm. When the thickness of the printed layer 130 is less than 0.01 mm, printing may be difficult, and when the thickness of the printed layer 130 exceeds 0.3 mm, the flooring manufacturing cost may increase.

In the present invention, the base layer 140 serves as the most basic layer of the flooring material to support the upper transparent layer 120 and the printed layer 130 and to absorb the impact of the upper or lower portion.

The base layer 140 preferably has a thickness of 1.0 ~ 5.0 mm. When the thickness of the base layer 140 is 1.0 mm or less, the above functions cannot be properly performed. When the thickness of the base layer 140 exceeds 5.0 mm, the flooring material is used by using many c-PLA / a-PLA blend resins. It causes a rise in manufacturing cost.

As described above, the base layer 140 may use a c-PLA / a-PLA blend resin containing an acrylic copolymer as a non-phthalate plasticizer and a melt strength enhancer, and additionally, a lubricant, a chain extender, and an internal moisture. Release, calcium carbonate, titanium dioxide, wood flour, rosin and the like may be added alone or in addition of two or more thereof.

In the present invention, the easy layer 150 is a part made of the adhesive with the bottom surface during construction, protects the back surface opposite to the flooring surface, and serves to prevent moisture of the floor.

The easy layer 150 is 100 parts by weight of c-PLA / a-PLA blend resin, 5 to 60 parts by weight of a non-phthalate plasticizer of ATBC, 0.1 to 20 parts by weight of acrylic copolymer as a melt strength enhancer, higher fatty acids as lubricant It is preferable to contain 0.01-10 weight part and 0.01-10 weight part of chain extenders.

In addition, the easy layer 150 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, titanium dioxide, based on 100 parts by weight of the c-PLA / a-PLA blend resin. (TiO ₂ ) It may further comprise one or more of 50 parts by weight or less and rosin 20 parts by weight or less.

The easy layer 150 preferably has a thickness of 0.10 to 2.0 mm. If the thickness of the easy layer 150 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 150 exceeds 2.0 mm, the manufacturing cost may increase.

Manufacturing example

In the following, preferred examples of the present invention are presented. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Transparent layer manufacturing

20 parts by weight of ATBC, 10 parts by weight of acrylic copolymer, 5 parts by weight of stearic acid as higher fatty acid, based on 100 parts by weight of c-PLA / a-PLA blend resin having a weight ratio of c-PLA: a-PLA of 50:50, 5 parts by weight of diisocyanate and 5 parts by weight of carbodiimide were first kneaded using an extruder, kneaded at 140 ° C. with a half-barrier mixer, and then mixed first and second using a double roll of 140 ° C. Then, the produced raw material was calendered at the temperature of 130 degreeC, and the sheet | seat of thickness 0.5mm was manufactured.

Printed layer manufacturing

30 parts by weight of ATBC, 10 parts by weight of acrylic copolymer, 5 parts by weight of stearic acid, 5 parts by weight of diisocyanate based on 100 parts by weight of the c-PLA / a-PLA blend resin having a weight ratio of c-PLA: a-PLA at 70:30 By weight and 5 parts by weight of carbodiimide, 50 parts by weight of calcium carbonate, 20 parts by weight of titanium dioxide was processed in the same process as the above-mentioned transparent layer manufacturing process, a white sheet having a thickness of 0.2 mm was prepared.

The print layer formed a pattern on the surface of the white sheet through a gravure printing or a transfer printing method.

Base layer manufacturing

20 parts by weight of ATBC, 10 parts by weight of acrylic copolymer, 5 parts by weight of stearic acid, 5 parts by weight of diisocyanate, based on 100 parts by weight of c-PLA / a-PLA blend resin having a weight ratio of c-PLA to a-PLA of 50:50. 5 parts by weight and 5 parts by weight of carbodiimide, 500 parts by weight of calcium carbonate, 100 parts by weight of wood powder, 20 parts by weight of titanium dioxide and 10 parts by weight of rosin were processed in the same manner as in the above-mentioned transparent layer manufacturing process to prepare a sheet having a thickness of 2 mm. It was.

Easy layer manufacturing

20 parts by weight of ATBC, 10 parts by weight of acrylic copolymer, 5 parts by weight of stearic acid, 5 parts by weight of diisocyanate, based on 100 parts by weight of c-PLA / a-PLA blend resin having a weight ratio of c-PLA to a-PLA of 50:50. 5 parts by weight and 5 parts by weight of carbodiimide, 250 parts by weight of calcium carbonate, 100 parts by weight of wood powder, 20 parts by weight of titanium dioxide and 10 parts by weight of rosin were processed in the same manner as in the above-mentioned transparent layer manufacturing process to prepare a sheet having a thickness of 1.2 mm. It was.

Surface Treatment Layer Manufacturing

After the transparent layer, the printed layer, the base layer, and the easy layer were thermally laminated using embossing rolls, a urethane acrylate-based UV curable coating material was applied to the surface of the transparent layer embossed using an embossing roll, and irradiated with ultraviolet rays to a thickness of 0.05. The final flooring material could be prepared by forming the surface treatment layer of mm, and in this embodiment, the transparent layer, the printing layer, the base layer and the easy layer were prepared based on the c-PLA / a-PLA blend resin.

As described above, the flooring using the PLA blend resin according to the present invention has a plurality of interlayer structure, but is not always limited to the above description. For example, the PLA blend resin layer alone may be used as the flooring material, and the transparent layer or the print layer and the PLA blend double layer may be used as the flooring material.

In addition, in addition to the above-described surface treatment layer, transparent layer, printing layer, base layer and easy layer, a dimensionally stable layer formed of a glass fiber (Glass Fiber) impregnated structure may be further included, and includes a chip through layer. It can also be used for green flooring including flooring and chip inlaid layer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, the true scope of the present invention should be determined by the following claims.

110: surface treatment layer
120: transparent layer
130: Printed layer
140: base layer
150: easy layer

Claims (16)

delete delete delete delete delete delete delete delete delete delete delete From above, including a surface treatment layer, a transparent layer, a printing layer, a base layer and an easy layer,
Each of the transparent layer, the print layer, the base layer, and the easy layer includes a blend resin of c-PLA and a-PLA as a binder, an ATBC nonphthalate plasticizer, an acrylic copolymer as a melt strength enhancer, a higher fatty acid and a chain as a lubricant. Processability improved PLA flooring comprising an extender.
The method of claim 12,
The transparent layer is improved PLA flooring material, characterized in that the hydrolysis agent is further added.
The method of claim 12,
The printing layer is PLA flooring material having improved processability, characterized in that at least one of a hydrolysis agent, calcium carbonate and titanium dioxide is further added.
The method of claim 12,
The base layer is improved PLA flooring material, characterized in that one or more of the hydrolysis agent, calcium carbonate, wood powder, titanium dioxide and rosin is further added.
The method of claim 12,
The easy layer is PLA flooring material with improved processability, characterized in that one or more of the hydrolysis agent, calcium carbonate, wood powder, titanium dioxide and rosin are further added.

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