KR20040012213A - Hemp floor and preparation thereof - Google Patents

Abstract

PURPOSE: A hemp floor and a method for manufacturing the same are provided to achieve improved antibacterial property and durability, while promoting health of the user by radiating far infrared rays. CONSTITUTION: A hemp floor comprises a layer formed of hemp chips and a hemp fiber extracted from the inner skin of the hemp, wherein the hemp fiber and the hemp chip are mixed at the ratio of 2:8 to 8:2. A method for manufacturing a hemp floor comprises a step of extracting a hemp fiber from the inner skin of the hemp; a step of producing hemp chips by chipping the inner skin of the hemp; a step of sorting the hemp chips and drying the sorted hemp chips; a step of mixing the hemp fiber and hemp chips through the use of an adhesive; a step of forming the mixture into a mat shape; and a step of performing a heat pressing and humidity controlling operation on the mat.

Description

Hemp floor and preparation method

The present invention relates to a hemp floor further laminated with a functional layer, such as a hemp floor manufactured from hemp or a layer having a wood veneer or an electric heating device, and a method of manufacturing the same.

Flooring is a kind of flooring material that supports loads of objects and people, keeps warm and decorative functions, and flooring is especially important in Korea where the ondol culture is developed. Flooring is solid wood flooring, solid wood flooring, plywood flooring, cork flooring and reinforced flooring (laminate flooring), ondol flooring depending on the application, sports flooring, commercial and decorative flooring, and flooring flooring and adhesive flooring depending on the construction method. And suspended floors.

Hemp (大麻) is the first year of the genus, 2 to 2.5 m tall, also known as hemp (麻). Hemp is used for various purposes such as fiber, pay, medicine, etc., but it is grown mainly for fiber in Korea. Fiber is used for fabrics, mosquito nets, tents, ropes, nets, mat yarns, blends, etc., and seeds are used for seasoning or oil production.

Hemp Island has excellent antimicrobial properties to prevent bacterial growth (antibacterial: 97.5%), high UV protection rate (88.1%) and absorb infrared light. Durability and tensile strength are also the best among the fibers and radiate far infrared rays (far infrared emissivity: 88.4%), which is good for health. In addition, it is resistant to moisture, has excellent breathability and moisture output (about 40 times of cotton), and is environmentally friendly because it is 100% completely organically decomposed.

To date, floors of various functions and uses have been developed and manufactured, but floors based on hemp have not been manufactured, and the present inventors have conceived floors using hemp.

The present inventors have applied for a method for manufacturing hemp yarn in an automated process (Korean Patent Registration No. 275137). As a result of research for utilizing the hemp yarn, a novel hemp floor was developed.

Accordingly, an object of the present invention is to provide a hemp floor manufactured using hemp having the advantages of natural fiber.

Another object of the present invention is to provide a method for producing the hemp floor.

1 is a process chart showing a process of manufacturing the hemp floor of the present invention,

Figure 2 is a perspective view of a hemp floor laminated veneer,

Figure 3 is an exploded perspective view showing a layer of hemp floor laminated with an electric heating device

<Description of the symbols for the main parts of the drawings>

10: hemp floor layer

20: veneer

30: layer with electric heater

40: electric wire

The hemp floor of the present invention for achieving the above object is characterized in that it comprises a layer formed by mixing and molding the hemp fibers and hemp chips extracted from the skin of hemp.

The mixing ratio of the hemp fibers and hemp chips is not particularly limited, and may be adjusted in a range of 2: 8 to 8: 2 by weight depending on the use. A high proportion of hemp fibers makes the floor more flexible and thinner, while a higher proportion of hemp chips increases the strength of the floor. The reason for mixing the hemp fibers is to increase the filling rate by providing flexibility to the floor and filling the space between the hemp chips. If the mixing ratio of hemp fibers is too small, the above effects cannot be expected, so it is preferable to mix at least 20% by weight of hemp fibers.

The hemp floor of the present invention may further be laminated with a veneer layer or an electric heating device, if necessary, on the floor layer composed of hemp. The veneer layer is laminated for decorative purposes and for the quality of the product, and artificial veneers such as natural veneer or decopaper can be used. In addition, hemp fibers and hemp chips formed of hemp layer can be used as a pattern wood layer, in which case it is advantageous to thin the thickness to facilitate the printing of the pattern and to increase the mixing ratio of hemp fibers. When a layer having an electric heating device such as a heating wire is laminated on the hemp floor layer, it can be used as a heating floor, and it can also be used as a matrix of a bed. On the other hand, for the purpose of providing surface protection, soundproofing, flame retardant, harmful electromagnetic shielding, strengthening strength or other functionalities can be further laminated to the coating process or a layer having such a function.

Method for producing hemp floor of the present invention is the step of separating and subdividing hemp skin of hemp to extract hemp fibers; Grinding hemp epidermis to produce hemp chips; Selecting and drying the hemp chips to a predetermined size; Mixing the hemp fibers and the selected hemp chips with an adhesive; Processing the mixture into a mat shape in a molding machine; Hot-pressing and humidifying the mat. If necessary, the method may further include laminating a layer having a wood veneer or an electric heating device on the top or bottom of the hemp floor, and may further include surface protection, soundproofing, flame retardant, harmful electromagnetic shielding, strengthening strength, or other functional provision. It may further comprise the step of further coating the purpose of the coating process to this function.

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

1 is a process diagram showing a process for manufacturing the hemp floor of the present invention, the first step is the step of separating the hemp skin from the hemp raw material. Specifically, hemp is cut to a certain length and put in a bucket of water. Boil at least 6 hours or more in boiling water. This weakens the pectin existing between the hemp envelope and the epidermis, making it easier to separate the hemp epidermis. At this time, when boiled to improve the separation efficiency, hemp raw material in the bucket can be rotated or treated with chemicals such as hydrochloric acid. In addition, in addition to hydrochloric acid, a vegetable aqueous solution of fermented garlic or onion may be added. The amount of hydrochloric acid and vegetable aqueous solution added is about 0.5 (v / v)% based on the total weight of water.

After weakening the pectin, the hemp material is beaten with a tamper to completely separate the hemp skin. The tamagi is provided with a conveyor of a certain length, the skin peeled off while the hemp raw material is moved in the conveyor falls down the conveyor, and the fibrous epithelium is completely separated by moving continuously on the conveyor.

After washing the separated hemp hump with water and dried, the hemp hump is sprayed with a fabric softener. Since hemp is a strong fiber, it is necessary to make the fiber flexible for later processing. The fabric softening agent used here is a vegetable softening agent, for example, dropping oil can be used. In addition, light oil may be added so that the softener penetrates the hemp fibers. The concentrations of the dropping oil and the diesel oil added are 0.2 (v / v)% and 0.1 (v / v)%, respectively. After 84-92 hours of curing at 42 ° by curing agent treatment, the hemp hump swells to some extent and swells and becomes soft.

On the other hand, in order to make the hemp sheath more flexible, the work of pressing the hemp sheath using a roller can be performed in parallel, and as a result, the fiber is leveled. In addition, hemp sheath can be made more flexible by performing additional tamaping and curing process for the cured hemp sheath.

The second step is to extract hemp fibers from the isolated hemp skin. Specifically, the cured and softened hemp humps are cut into pieces of about 20 cm in length, and then broken down into fibrous fibers as if hemp hemp was cut using a fiber grinder. This segmentation yields at least 100 strands of the epithelium in one cannabis.

The hemp fibrous skin broken down as described above is put in a fiber separator and wound into long fibers and short fibers. When the fiber separator is placed in a fiber separator and the granular fibrous skin is moved by shaking, the short fibers are shortened to the lower side, and the long fibers are kept relatively long so that the long fibers and the short fibers are separated from each other. Skein the separated long and short fibers respectively. The long fiber is used as a fine fiber fine fiber, the short fiber is used as a normal fiber falling fiber tissue.

The third step is performed separately from the step of extracting hemp fibers, and is a step of preparing hemp chips by grinding (grinding, chipping) without fibrosis of hemp skin. Hemp humps are put in a chipper and ground to produce hemp chips of a predetermined size.

The fourth step is to select the hemp chips prepared in the step. If the hemp chips crushed in the crusher do not reach the predetermined size, they are sorted using a screen, and then the hemp chips larger than the predetermined size are returned to the crusher for regrinding. The selected hemp chips are dried in a drier and reselected using a screen, and hemp chips larger than a predetermined size are returned to the grinder. For efficient screening, screens with large intervals are used for the first screening, and screens with the desired body spacing are used for the second screening. The size of the hemp chip is made to be 1 cm 3 or less, preferably 0.5 cm 3 or less in volume to increase the filling rate and facilitate the molding process.

The fifth step is to mix the hemp fibers and hemp chips prepared above with an adhesive. The adhesive used herein is not particularly limited, and examples thereof include vinyl acetate resin, modified acrylic emulsion, synthetic rubber, PVC resin, epoxy resin, modified epoxy resin, EVA (Ethylene-vinyl acetate copolymer) resin, and concrete. Preferably, MDI (Methylene diphenyl diisocyanate) having a waterproof function is used as a raw material of polyurethane. The amount of MDI added depends on the mixing ratio of hemp chips and hemp fibers, and 5 to 20% by weight is appropriate for the mixed weight of hemp chips and hemp fibers. You can use less adhesive because it mixes fine hemp chips and hemp fibers.

The sixth step is forming the mixed raw material into a mat shape. Hemp fibers, hemp chips, and adhesives are added to the molding machine and cold pressed at room temperature to produce a mat of a certain size.

The seventh step is to heat press the mat. Specifically, a press having a thickness of about 22.5 mm is produced by hot pressing at a temperature of 160 to 170 ° and a pressure of 40 to 50 kgf / cm 2. Thus, when the hot pressing is performed, physical properties such as strength and heat resistance of the mat can be improved. Can be.

As a final step, in the humidity control room equipped with a blower for the purpose of humidity control, the heat-treated mat is humidified while cooling to room temperature, and then cut and packaged to manufacture a final product hemp floor. The hemp floor thus prepared has a density of 0.4 to 0.6 g / cm 3.

The hemp floor of the present invention may consist of 100% hemp raw material, but preferably further laminates a functional layer as needed.

Figure 2 shows the hemp floor laminated veneer on the hemp floor layer prepared above, the hemp floor layer 10, the veneer layer 20 is stacked on top. As veneer, artificial veneer such as natural veneer or deco paper may be used, and a floor layer formed of hemp fibers and hemp chips may be used as the veneer layer. When the hemp floor layer is used as the veneer layer, it is advantageous to make the thickness thin so as to facilitate the printing of the hemp and increase the mixing ratio of the hemp fibers. Specifically, for example, the mixing ratio of hemp chips and hemp fibers is set to 8: 2 in the lower hemp floor layer, which is a base material, and the mixing ratio of hemp chips and hemp fibers is set to 2: 8 in the veneer layer. The adhesive used for lamination of the hemp floor layer and the veneer layer uses the above-mentioned conventional adhesive or MDI.

The printing process may use a conventional printing method such as convex printing, flat printing, concave printing, stencil printing, specifically offset printing, gravure printing, screen printing, transfer printing, flexo printing. It is preferable to print so that various colors and patterns are grafted according to the preference of the consumer, and the printing method and pigments used are not particularly limited as long as they can express various colors and patterns.

3 is an exploded perspective view showing a hemp floor in which a layer having an electric heating device is stacked on the hemp floor layer, in which a layer 30 having an electric heating device is stacked below the hemp floor layer 10. As the electric heating device, a commonly used device such as a heating wire 40 may be used, and a temperature controller may be connected to a terminal of the heating wire to control the temperature. In this way, when a layer having an electric heating device is laminated on the hemp floor layer, it can be used as a floor for heating, and it can also be used as a matrix of a bed. The adhesive used for lamination | stacking of a floor-floor layer and the layer provided with an electric heating apparatus uses the above-mentioned conventional adhesive agent or MDI.

Both the veneer layer and the layer having the electric heating device may be laminated, and a coating layer may be laminated on the surface to protect the surface layer. In addition, the hemp floor layer may be further laminated with a functional layer having a coating or the like function for the purpose of soundproofing, flame retardant, harmful electromagnetic shielding, strengthening strength or other functional provision.

The hemp floor of the present invention accommodates the advantages of hemp fiber, which is a natural fiber, has excellent antibacterial properties, high self-blocking rate, excellent durability and tensile strength, and radiates far-infrared rays, which is beneficial to health. In addition, it has excellent moisture resistance and breathability, and is 100% organically decomposed, so it is environmentally friendly, and you can feel the luxurious texture of natural materials.

As described above, the hemp floor of the present invention is excellent in antimicrobial, durability, moisture resistance and breathability, and is environmentally friendly and 100% degradable because it radiates far-infrared rays and can feel the luxurious texture of natural materials.

Claims (5)

A hemp floor comprising a layer formed by mixing hemp fibers and hemp chips extracted from the skin of hemp at 2: 8 to 8: 2 and forming. The hemp floor according to claim 1, wherein the veneer layer is further laminated. The hemp floor according to claim 1, further comprising a layer with an electric heater. Extracting hemp fibers by separating and subdividing the epidermis of hemp; Grinding hemp epidermis to produce hemp chips; Selecting and drying the hemp chips to a predetermined size; Mixing the hemp fibers and the selected hemp chips with an adhesive; Processing the mixture into a mat shape in a molding machine; A method of manufacturing hemp flooring comprising the step of hot pressing and humidifying the mat. The method of claim 4, further comprising the step of laminating a layer having a wood veneer or an electric heating device on or above the hemp floor.