KR20180052386A - Cork type elastic flooring for children's playground and physical training facilities, manufacturing method thereof and method for constructing elastic floor using the same - Google Patents

Abstract

According to one embodiment of the present invention, a method for manufacturing cork type elastic flooring comprises the following steps: (a) grinding cork raw materials to manufacture cork chips; and (b) mixing the cork chips with a wood binder, and coating and drying the cork chips to manufacture the cork type elastic flooring. The present invention can provide an eco-friendly elastic flooring which does not contain heavy metals or carcinogens by processing corks using eco-friendly corks, mixing processed materials using an eco-friendly wood binder, and coating and drying the mixture.

Description

TECHNICAL FIELD The present invention relates to a cork elastic flooring material for children's play facilities and sports facilities, a method for manufacturing the cork elastic flooring material, and a method for constructing an elastic flooring material using cork elastic flooring material.

The present invention relates to a cork elastic flooring material for children's play facilities and athletic facilities, a method for manufacturing the cork elastic flooring material, and a method for constructing an elastic floor using the cork elastic flooring material. The present invention relates to detection of heavy metals in school playground urethane tracks, The present invention relates to a technology for providing an eco-friendly flooring material for solving the problem of formaldehyde detection and the like.

Urethane resilient flooring is widely used for school playground track, basketball court, or city park walkway because of its excellent elasticity and various colors. In recent years, heavy metal exceeding the standard level has been detected on the school playground urethane track. Problems such as being taken up. This is expected to cause continuous problems because it is the urethane elastic flooring material of the same material as the urethane track of the school playground, the walkway of the city park, and the flooring of the children's play facility.

Existing urethane elastic flooring has a durability of about 5 years. When the color is changed or the surface is torn off, the rubber chip laid in the middle of the underneath of the color rubber chip laid on the top surface is exposed and the exposed rubber chip is exposed to sunlight When heat is applied, there is a problem that heavy metal materials and formaldehyde are dissipated. Particularly, among the components of the binder which adhere between the urethane or rubber layers, the bond component for bonding the rubber is included by 20% of the total, and all of the bond components are formaldehyde components. Accordingly, the bond component comprising the formaldehyde component contains volatile carcinogens, which, when heated, can be released into the air and inhaled into the body of infants or adolescents, which can have a very detrimental effect.

These urethane materials have been forced to use synthetic urethane or waste tire chip rubber as an elastic material while facility managers or constructors are aware of the side effects due to their advantages such as elasticity and friction coefficient as flooring materials for sports facilities and city parks.

Therefore, when the durability is over or before it starts to break down, it will be disposed of. Even if it is discarded, it is classified as special waste and it is costly, but it can not cope with environmental pollution.

The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a wood-binding binder which does not cause a carcinogenic substance such as formaldehyde by utilizing a cork chip made only of environmentally friendly wood, And an object of the present invention is to provide an elastic flooring material which is similar to the above-

According to one embodiment of the present invention, a method of manufacturing a cork elastic flooring material comprises the steps of: (a) crushing cork raw material to produce cork chips; And (b) mixing the cork chips with a woodworking binder, coating and drying the cork chips to produce cork elastic flooring; .

According to another embodiment of the present invention, an elastic floor construction method using a cork elastic flooring comprises the steps of: (a) installing a first elastic layer of cork material on a construction surface formed of at least one of ascon, asphalt and concrete (B) mixing a cork elastic flooring material having a diameter of 3-10 mm on each of the first elastic layers, the cork elastic flooring material having a diameter of 3 to 10 mm, the surface of which is coated with a first woodworking binder and dried, and the second woodworking binder Thereby providing a second elastic layer; And (c) pressing the surface of the second elastic layer at least once using a heat roller.

According to another embodiment of the present invention, the cork elastic flooring material is composed of cork chips each having a diameter of 3-10 mm and dried after surface coating with a woodworking binder, wherein the cork chips, Is from 1: 9 to 2: 8 on a weight basis.

The present invention relates to an eco-friendly elastic flooring material in which heavy metal or carcinogenic substances are not detected by processing corks using eco-friendly corks, mixing them using an eco-friendly binder for wood, coating and drying, .

In addition, there is a problem in using the cork raw material itself as an elastic flooring material. Although the cork raw material itself has good elasticity, there is a problem of tensile strength, breakage, and strong restoring force. Accordingly, the present invention provides a method of processing a cork chip by coating a cork chip with a cork chip to remove tension and debris, I solved the problems.

Unlike the conventional urethane elastic flooring material, the elastic flooring material using the cork chip, which is used and constructed in the present invention, has an advantage that it can be recycled even when the product is demolished.

In addition to the present invention, if the cork is pulverized with a chip, and then mixed with an environmentally friendly paint before the binder is coated, the cork chip is further coated with various colors to maintain the environmentally friendly product.

1 is a flowchart illustrating a method of manufacturing a cork elastic flooring material according to an embodiment of the present invention.
2 is a cross-sectional view of an elastomeric floor including a cork resilient floor according to an embodiment of the present invention.
3 is a cross-sectional view of an elastic floor further comprising a drainage layer in accordance with another embodiment of the present invention.
4 is a flowchart illustrating an elastic floor construction method using a cork elastic flooring material according to an embodiment of the present invention.
FIG. 5 is a conceptual view for explaining a process of pressing through a heat roller after forming an elastic floor according to an embodiment of the present invention.
6 is a photograph of a cork pad according to an embodiment of the present invention.
Figure 7 is a photograph of a cork elastic flooring made according to one embodiment of the present invention.
8 is a photograph of a drainage layer produced in accordance with an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

 One embodiment of the present invention provides a technique for constructing an elastic floor by using only cork and constructing an elastic floor using the same.

Here, cork is derived from cork oak, which is produced in southern Europe such as Spain. Therefore, it is called cork, and in Korea, oak is used as cork. The cell wall of cork is formed by the deposition of a polymer of fatty acid SUBERINE and has excellent properties of insulation, sound insulation, electrical insulation, elasticity, and is widely used as a material for bottles, shoe insole, thermal insulation container, sound barrier, As a particle, Jangjungseok is also known as a firefly, and it is a mineral material with alkali and porosity which is excellent in humidity control, prevention of dew condensation, keeping warm, deodorizing function, antifungal property, antibacterial property and also excellent in far-infrared radiation function and anion generation function. Ion exchange ability, moisturizing, humidity control function and minimizes radiant heat.

Hereinafter, with reference to Fig. 1, a method of manufacturing the cork elastic flooring will be described in detail.

First, the cork raw material is crushed to produce cork chips in the form of small granules (S110).

The cork raw material can be obtained by taking a shell of a certain thickness outside the cork oak tree. Such cork raw materials can be crushed through a crusher to produce granular cork chips. At this time, the diameter of each cork chip to be produced may be 3-10 mm. Preferably, it may have a diameter of 3-5 mm.

On the other hand, when a cork chip for use in which a color is not mixed with a paint and a cork chip for use without binding is to be manufactured, it may be pulverized to have a diameter of 5-10 mm. However, the diameter of the cork chip is only an embodiment of the present invention, and it may be formed with other diameters.

Subsequently, an environmentally friendly paint is mixed with the cork chip in the mixing container to produce a color cork chip (S120).

At this time, the cork chips and the environmentally friendly paint are mixed through an agitator, and the number of revolutions per minute of the agitator can be set to 80 to 100 RPM. Further, the addition ratio of the environmentally friendly paint to the cork chips may be 5-10% based on the weight ratio. However, the addition ratio may vary depending on the color and the saturation. However, the higher the saturation of the environment-friendly paint, the more the addition ratio can be increased.

Then, the environmentally friendly binder and the color cork chip are mixed (S130).

The environmentally friendly binder serves to coat the surface of the color cork chip. Wooden materials such as cork have the characteristic of expanding or deforming when they absorb water or moisture. Therefore, it is necessary to primarily coat the surfaces of each of the cork chips.

The eco-friendly binder may be a binder for woodworking. One embodiment of the present invention makes use of wood binder for making the elastic flooring material into wood. At this time, the woodworking binder does not contain the formaldehyde component since it does not contain the rubber adhesive bond component unlike the binder for adhering the urethane or rubber according to the prior art. Specifically, the environmentally friendly binder has a density of 1.1 ± 0.1 g / cm 3 (1.0-1.2 g / cm 3), a specific gravity of 1.05 ± 0.1 (0.95-1.15) and a viscosity of 2,000-8,000 (cps / 25 °) , And the solids purity of 97% or more. In addition, the woodworking binder does not contain a volatile solvent.

The wood-binding binder having the above-described structure may have a tensile strength of 25 MPa or more, a flexural strength of 25 MPa or more, and a compressive strength of 150 MPa or more.

The binder for woodworking is KS G ISO 8124-3 (KS standard name: Safety of toys - Part 3: Elution of specific elements, effective date: 2015.12.21, corresponding international standard: ISO 8124-3: According to the test method of lead, cadmium, chromium, barium, antimony, mercury, mercury, and lead in accordance with the test method of the source: http://www.kssn.net/StdKS/ks_detail.asp?k1=G&k2=ISO%208124-3&k3=5) Arsenic, and selenium can not be detected.

The color cork chips and wood binder may be composed of 10-20% and 80-90%, respectively, on a weight basis. That is, the mixing ratio of the cork chips and the woodworking binder may be 1: 9 to 2: 8.

At this time, it is also possible to distribute the cork chips on a flat surface and then spray wood binding binders on the cork chips, or to perform the coating by quenching the cork chips in the container containing the wood binding binder.

Subsequently, the color cork chip is cured and crushed and then dried to complete the cork elastic flooring (S140).

Specifically, after the cork chips are spread on the flat surface, the set of cork chips after hardening can be crushed by cutting each cork chip to have a diameter of 2-3 mm.

Alternatively, it may simply go through the curing or drying process without going through the milling process.

Applying color to common cork materials is technically challenging and costly, so there are limits to implementing a variety of colors. Accordingly, the use of cork is limited to one color. However, in the case of the present invention, when the cork raw material is crushed and then mixed with the environmentally friendly paint before the binder is applied, the color cork chip can be easily implemented and the environmentally friendly product of various colors can be maintained when the floor material is realized .

When the elastic floor 100 using the elastic floor material is formed through the above process, the structure of the elastic floor 100 may have a structure as shown in FIG. That is, the base layer 110, the first elastic layer 120, and the second elastic layer 130, such as an ascon, an asphalt, and a concrete, may be sequentially stacked. At this time, the first elastic layer 120 is a layer added for the purpose of increasing the elasticity to comply with the HIC 1000 specification. The above-described cork elastic flooring material can be utilized for the second elastic layer 130.

Meanwhile, in some cases, a drainage layer 115 may be additionally installed in order to prevent water from being accumulated in the elastic floor. The drainage layer 115 may be installed between the base layer 110 and the first elastic layer 120 .

Hereinafter, with reference to FIG. 4, a method of constructing the elastic floor 100 using the cork elastic floor material will be described in detail.

The base layer 110 of the area to be applied may be formed to include at least one of ascon, asphalt, and concrete. In addition, the area to be applied may be formed with a depressed area in the form of a groove to which the elastic flooring material is to be installed. For example, assuming a playground floor, the base layer 110 of the area to be constructed may be formed at a lower height than other areas around the playground, and then the same height as the other parts by filling the elastic flooring .

First, the surface of the base layer 110 is polished using a roller (S210). The compaction process is carried out to prevent cracks in the base layer of the construction surface.

On the other hand, in general, a slope may be formed on the construction surface so that water can escape in one direction when water such as rainwater flows in. However, if this is not the case, there is a possibility that the inflow water will be concentrated inside the elastic floor, so that the drainage layer 115 may be additionally installed on the construction side.

The drainage layer 115 may be formed of cork chips having a diameter greater than the diameter of the cork chips constituting the second elastic layer 130 (or having a diameter greater than the diameter of the cork chips of the first and second elastic layers 130) . Specifically, it may be configured to be pressed into cork chips having a diameter larger than 3-5 mm. For example, it can be configured as shown in the photograph of FIG.

Subsequently, the first elastic layer 120 is laid on the construction surface (S220). The first elastic layer 120 is made of a cork material, and may be a cork pad or a cork chip.

The cork pad may be composed of cork chips that are larger than the diameter of the cork chip constituting the second elastic layer 130. Specifically, the cork pads may be formed by burning large-diameter cork chips by heating them, and then pressing them. In the case of heating and burning in this way, the moisture in the cork chip escapes and the surface is burnt, so that the strength is improved and the elasticity is also improved.

When the first elastic layer 120 is formed of a cork chip, the first elastic layer 120 can be formed by densifying the cork chips without binding. The cork chip at this time may also be configured to have a larger diameter than the cork chip of the second elastic layer 130.

Meanwhile, the first elastic layer 120 may be thicker than the second elastic layer 130 to increase the elasticity. Accordingly, the first elastic layer 120 may be configured such that the HIC (Head Injection Criterion) value satisfies 1000. [ HIC stands for the head injury index, which is an index defined by the magnitude of the impact on the floor and the duration of the impact. As an elastic flooring material for children's play facilities in Korea, the elasticity for children's product certification is specified to have a HIC value of 1000 or more.

When the first elastic layer 120 is formed of a cork pad, it is preferably formed to have a thickness of 22-28 mm. When the first elastic layer 120 is composed of a cork chip, it is preferably formed to have a thickness of 5 to 10 mm.

Next, the second elastic layer 130 is formed by mixing the cork elastic flooring material and the environmentally friendly binder on the first elastic layer 120 (S230).

If the eco-friendly binder used in the cork elastic flooring material is referred to as a first woodworking binder and the eco-friendly binder used in step S230 is referred to as a second woodworking binder, if the first woodworking binder is utilized for surface coating of the cork chip The second wood binder is utilized as a bond to enable the cork chips to be densely packed on the construction surface.

On the other hand, phytoncide may be added for antibacterial and fragrance work.

At this time, the compounding ratio between the second wood-binding binder, the cork chip, and the phytoncide may be as shown in the following table.

division The second wood binder Cork chip Phytoncide Sum HIC 1000 Mixing ratio First Embodiment 12.5% 84.5% 3.0% 100.0% 1,356mm Second Embodiment 22.5% 74.5% 3.0% 100.0% 1,242 mm Third Embodiment 32.5% 64.5% 3.0% 100.0% 1,105 mm Fourth Embodiment 42.5% 54.5% 3.0% 100.0% 985mm

In the case of the first embodiment, the height corresponding to the HIC 1000 is 1356 mm, which is equivalent to that of the conventional elastic rubber chip flooring, which is generally applied. However, since the elastic index of the first embodiment is the most excellent but the specific gravity of the cork chip is 84.5%, the density of the cork chip is large, so that the upper surface of the elastic floor 100 is pushed up after the completion of the construction. Can not do it.

In the case of the second embodiment, the height satisfying the HIC 1000 is 1242 mm, which is a numerical value satisfying the KC certification of the child product. In addition, the second embodiment shows a state in which the upper surface of the elastic floor 100 is not pushed up even after the completion of the construction, so that the flat draft operation can be performed.

In the case of the third embodiment, the height satisfying the HIC 1000 is 1105 mm, which is satisfied with the KC certification of the children's product. However, since the density between the cork chips widens in some areas, .

In the case of the fourth embodiment, there is no problem in the product authentication part, but it is difficult to say that it is a suitable example because the height of the HIC 1000 does not exceed 1000 mm.

Therefore, it is preferable that the ratio between the second wood-binding binder, the cork chip, and the phytoncide is 12.5-32.5%, 84.5-64.5% (not including the boundary value) and 3%, more preferably 18.5-26.5%: 78.5 -70.5%: 3%, and most preferably 22.5%: 74.5%: 3%.

Finally, the upper surface of the second elastic layer 130 is pressed and dried at least once through the heat roller 200 (S240).

5, the protruding surface of the second elastic layer 130 is pressed while reciprocating the second elastic layer 130 with the heat roller 200 for 30 to 60 minutes. The surface of the second elastic layer 130 may protrude slightly upward in comparison with other uncoated surfaces. This may be because the elastic flooring is made of wood. The pressing of the heat roller 200 may be performed a plurality of times at a predetermined time interval (a time interval, for example, 10-30 minutes such that the installed cork chip is not pushed up). On the other hand, the compression step can be repeated after 24 hours in winter and 12 hours in summer.

In addition, oil stain may be applied on the second elastic layer 130. Oily stain is a transparent oily liquid that acts as a coloring and finishing agent, mainly for the surface of semi-finished wood. Unlike other finishing agents, when applied, the oil permeates through the fibers of the wood to serve as a finishing agent for the coloring and oil components, but it can maximize the texture of the wood. The oily stain is a oily coloring agent and therefore has a coating effect.

The cork pads and the cork elastic flooring fabricated through this process can be seen from FIGS. 6 and 7. In the case of Fig. 7, it can be seen that the cork chips in the form of very small granules are pressed together to form a floor.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: elastic floor 110: base layer
115: drainage layer 120: first elastic layer
130: second elastic layer

Claims (20)

A method of manufacturing a cork elastic flooring material,
(a) crushing the cork raw material to produce cork chips; And
(b) mixing the cork chips with a woodwork binder, coating and drying the cork chips to produce cork elastic flooring;
≪ / RTI > The method according to claim 1,
(a-1) further comprising, after the step (a), mixing the cork chips and the environmentally friendly paint to produce color cork chips,
Wherein the step (b) comprises mixing the woodworking binder with the color cork chips to produce a color cork elastic flooring material. 3. The method of claim 2,
The step (a-1)
Wherein the cork chips and the environmentally friendly paint are mixed through an agitator, wherein the revolutions per minute of the agitator is set at 80 to 100 RPM. 3. The method of claim 2,
The step (a-1)
Wherein the ratio of the eco-friendly paint to the cork chips is 5-10% based on the weight ratio, and the higher the saturation of the eco-friendly paint, the higher the ratio. The method according to claim 1,
Wherein the mixing ratio of the cork chips and the woodworking binder is 1: 9 to 2: 8 on a weight basis. The method according to claim 1,
The woodworking binder comprises:
Wherein the density of the physical property is 1.1 + - 0.1 g / cm3, the specific gravity is 1.05 + 0.1, the viscosity is 2,000-8,000 (cps / 25 degrees), and the purity of the solid is 97% or more. The method according to claim 1,
The woodworking binder comprises:
According to the test method of KS G ISO 8124-3 (KS standard name: Safety of toys - Part 3: Elution of specific elements, effective date: 2015.12.21, corresponding international standard: ISO 8124-3: 2010) Wherein no lead, cadmium, chromium, barium, antimony, mercury, arsenic, selenium are detected. The method according to claim 1,
The step (b)
Comprising the steps of: distributing the cork chips on a plane and spraying the woodworking binder onto the cork chips, or performing a coating by quenching the cork chips in a container containing the woodwork binder. Method of manufacturing flooring material. The method according to claim 1,
Wherein the diameter of each cork chip to be ground is 3-10 mm. A method of constructing an elastic floor using a cork elastic floor material,
(a) disposing a first elastic layer made of a cork material on a formed surface including at least one of an ascon, an asphalt, and a concrete;
(b) mixing the cork elastic flooring material and the second woodworking binder each having a diameter of 3-10 mm on the first elastic layer and consisting of cork chips dried after surface coating with the first woodworking binder, 2 an elastic layer; And
(c) pressing the surface of the second elastic layer at least once using a heat roller. 11. The method of claim 10,
Further comprising the step of compacting the construction surface with a roller before step (a) to prevent cracking of the foundation layer. 11. The method of claim 10,
Further comprising the step of forming a drainage layer by laying cork chips having a diameter larger than the diameter of the cork chips constituting the second elastic layer on the installation surface before the step (a), wherein the elasticity of the cork elastic flooring material Floor construction method. 11. The method of claim 10,
Wherein the first elastic layer
Wherein the first elastic layer is made of cork chips that are larger than the diameter of the cork chip constituting the second elastic layer and formed of cork chips pressed by heating and then pressed, , A method of elastic floor construction using cork elastic flooring. 11. The method of claim 10,
Wherein the first elastic layer
Wherein the first elastic layer is thicker than the second elastic layer and has a HIC (Head Injury Criterion) value of 1000. The method of claim 1, wherein the first elastic layer is thicker than the second elastic layer. 11. The method of claim 10,
Wherein the weight ratio between the second woodworking binder and the cork elastic flooring material is 12.5: 84.5 to 22.5: 74.5. 16. The method of claim 15,
Wherein the second elastic layer comprises a phytoncide, wherein the second elastic layer comprises 3% by weight of the total weight of the second woodwork binder, the cork elastic flooring, and the phytoncide. 11. The method of claim 10,
The step (c)
(c-1) pressing the surface protruded on the second elastic layer with respect to the non-applied surface while reciprocating the second elastic layer with the heat roller for 30 minutes to 60 minutes; And
(c-2) performing the step (c-1) a plurality of times at predetermined time intervals. 11. The method of claim 10,
(d) applying oil stain on the second elastic layer after the step (c). Wherein the mixing ratio of the cork chips to the wood binder is in the range of 1: 9 to 2: 8 by weight based on the weight of the cork chips, Cork elastic flooring. 20. The method of claim 19,
Wherein the cork chip is composed of color cork chips mixed with an environment-friendly paint at a ratio of 5-10% based on the weight of the cork chips.

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