KR101932001B1 - Method for manufacturing of panel for eco-friendly furniture and furniture using the same - Google Patents

Abstract

The present invention relates to panel production for producing eco-friendly furniture, and production of the eco-friendly furniture using the same. According to the present invention, it is possible to produce eco-friendly wood panels by replacing formaldehyde-based adhesives which are normally used when processing waste sawdust or wood chips into wood panels, and to infiltrate specific vegetable oils into the inside and the outside of the manufactured wood panel while making the same remained, thereby completely blocking external release of harmful substances such as formaldehyde or total volatile organic compounds in the wood panel while preventing internal introduction or infiltration of the harmful substances and moisture.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing an eco-

The present invention relates to the manufacture of panels for manufacturing eco-friendly furniture and the production of eco-friendly furniture using the same.

In general, wood panels, including chipboard (PB) and fiberboard (MDF), are manufactured by immersing in formalin for embossing, and the finished wood panel is used to produce furniture or interior finishes. However, since these wood panels are used as furniture or interior finishing materials without any post-processing, large quantities of harmful substances such as formaldehyde and total volatile organic compounds (TVOC) are emitted. Accordingly, various diseases such as skin diseases such as atopy and rhinitis It may also be the cause. To solve this problem, Korean Patent Laid-Open Publication No. 2011-0109613 discloses a panel that is coated on the outer surface of a mixture of loess and natural bond so as to block harmful substances. However, due to the use of loess, If external impact is applied, there is a disadvantage that cracks occur in the loess or the relevant part falls off and harmful substances are discharged.

Accordingly, a problem to be solved by the present invention is to provide a wood panel which can recycle waste wood chips and wood chips to be used for the wood panel but can prevent the harmful substances such as formaldehyde or total volatile organic compounds (TVOC) And to manufacture environmentally friendly furniture using these wood panels.

In order to achieve the above-mentioned object, the present invention provides a method for producing a wood pulp, comprising: a first step of washing sawdust or pieces of wood with water or vegetable oil, followed by hot air drying at 45 to 55 ° C;

After drying by hot air, it is pulverized into fine particles of about 15 to 25 mesh, and then mixed with sawdust or wood chips at a weight ratio of 5 to 6.5: ground flour 1 to 2: 0.5 to 1.5 of an adhesive derived from rice flour and placed in a panel fixture, step;

A third step of pressing the sawdust or pieces of wood through the planarizing step to obtain a wood panel; And

And a fourth step of immersing the obtained wood panel in vegetable oil or applying vegetable oil to the wood panel,

The vegetable oils of the first and fourth stages are oils extracted from plants, seeds of plants or trees, and can be used independently of one another to produce a mixture of urushiol oil, linseed oil, palm oil, coconut oil, castor oil, grapeseed oil, jojoba oil, Safflower oil, macadamia oil, and olive oil,

In the second step, the adhesive derived from rice flour is a two-component aqueous solution into which an isocyanate compound is added to an aqueous solution containing polyvinyl alcohol, water, and fine powder, thereby producing a wood panel for environmentally friendly furniture.

According to one embodiment of the present invention, in the second step, the adhesive derived from rice flour further comprises at least one selected from a long fiber and a bio resin, wherein the long fiber is selected from the group consisting of corn fiber, coconut fiber, palm fiber fiber, , Straw, cotton, hemp, wool, natural fiber including silk, fiberglass, carbon fiber and nylon, and the bio-resin may be selected from the group consisting of bio-polyolefin resin derived from sugarcane by-product and starch-derived polylactic acid ≪ / RTI >

According to another embodiment of the present invention, the fourth step may further include a water flame retardant in which ammonium phosphate monobasic, boric acid and ammonium hydroxide are mixed at a weight ratio of 1: 10: 1 to 10: 1 to 5:

According to another aspect of the present invention, there is provided a method of manufacturing an environmentally friendly furniture using a wood panel,

The wood panel is made of the wood panel manufactured according to the above-described manufacturing method. The wood panel is coated with a two-component adhesive, and then the wood panel and another wood panel are overlapped with each other in an odd number of layers, heated and pressed, Wherein the two-component adhesive includes 1 to 5% by weight of the polyvinyl alcohol resin, 10 to 20% by weight of the rice flour, 10 to 40% by weight of the isocyanate compound, and the balance being water, based on the total weight of the adhesive The present invention provides a method of manufacturing environmentally friendly furniture.

The eco-friendly furniture panel and the method of manufacturing eco-friendly furniture according to the present invention have the following effects.

1. It has the effect of not only recycling waste sawdust or pieces of wood but also regenerating environmentally friendly.

2. By making wood panel and impregnating it with specific vegetable oil, it is possible to prevent the external discharge or external influx of harmful substances such as formaldehyde and total volatile organic compounds contained in sawdust or wood chips.

3. Prevention of the occurrence of diseases such as atopy or sick house syndrome by preventing the external emission or external inflow of harmful substances.

FIG. 1 is a block diagram schematically illustrating a method of manufacturing an eco-friendly furniture panel according to an embodiment of the present invention.

Preferred embodiments of the present invention will be described more specifically with reference to the accompanying drawings.

As shown in FIG. 1, a method of manufacturing an eco-friendly furniture wooden panel according to an embodiment of the present invention includes steps of washing sawdust or wood pieces and drying hot air (S1), introducing pulverized sawdust or wood- A planarization step S2, a press drying and a wood panel obtaining step S3, and a vegetable oil immersion step S4. And may further include a washing liquid removing step (not shown).

The step (S1) of washing the sawdust or pieces of wood and drying the hot air is a step of washing sawdust or pieces of wood with water or vegetable oil, followed by hot air drying at 45 to 55 ° C. Here, sawdust and wood chips are not limited thereto, but it is preferable to have particles of a certain size as much as possible to shorten the drying time of the wood panel and provide a dense structure. Water or vegetable oil used for cleaning is used for cleaning fine dusts such as sawdust or wood chips. Use of vegetable oil is preferably used to prevent harmful substances such as formaldehyde or total volatile organic compounds (TVOC) from leaking to the outside It is more preferable that the cleaning residual liquid removing step is not separately required in consideration of the self volatility.

Examples of the vegetable oil include vegetable oils extracted from plants, seeds of plants, or trees, and may be used independently of one another to produce a vegetable oil such as urushiol oil, linseed oil, palm oil, coconut oil, castor oil, grape seed oil, jojoba oil, safflower oil, And olive oil. In consideration of atopic fouling and moisture-proofing properties, it may be preferable to use urushiol oil, linseed oil or palm oil. Some of the components of the vegetable oil may be contained in the form of a solid or an extract such as seed extract powder. Herein, the vegetable oil refers to the extraction stock solution. For example, it can be prepared as follows: white flour and leaves are washed, boiled for 7 hours at 100 ° C, and then evaporated by lowering the temperature, Can be extracted.

(S2) of pulverized sawdust or wood pieces is pulverized into fine particles of 15 to 25 mesh or 18 to 22 mesh after the hot air drying described above, and then pulverized sawdust or wood pieces of 5 - 6.5: Soot 1 ~ 2: Mixed in a weight ratio of 0.5 ~ 1.5 of an adhesive derived from rice flour, placed in a panel fixture and flattened evenly. Here, the pulverization process into the fine particles having the mesh range is preferable because the drying time of the wood panel can be shortened and the dense texture can be provided.

The adhesive derived from the soil and rice flour is used as an eco-friendly adhesive component for sawdust or wood pieces. In the case of soil, the use of loess in the form of fine powder is preferable because it can increase the adhesive strength. In the case of the adhesive derived from rice flour, Based adhesive liquid prepared by mixing an isocyanate compound with an aqueous solution obtained by mixing polyvinyl alcohol and water. For example, it is preferable that the polyvinyl alcohol is contained in an amount of 1 to 5% by weight, the rice flour is 10 to 20% by weight, the isocyanate compound is contained in an amount of 10 to 40% by weight based on the total weight of the two- And environmental friendliness can be provided together.

The above-mentioned adhesive derived from rice flour is preferably used because the cross-linking is formed between the hydroxyl group of the rice flour and the NCO group of the isocyanate compound by stirring the aqueous bicarbonate solution during the production to provide the basic skeleton of the adhesive, The adhesive strength can be further improved. The rice flour may be a fine particle type usually provided, for example, a sieve of about 100 mesh may be squeezed and hot-air dried.

When the rice flour adhesive includes long fibers selected from the group consisting of corn fiber, coconut fiber, palm fiber fiber, bamboo, reed, straw, cotton, hemp, wool, natural fiber, glass fiber, carbon fiber and nylon Due to the role of bridge, physical adhesion can be given. The rice flour adhesive and the long fiber may be blended in a weight ratio of 30:70 to 100: 0, a weight ratio of 35:65 to 90:10, or a weight ratio of 55:45 to 80:20. can do.

Furthermore, it is preferable that the adhesive derived from the rice flour further comprises a biopolymer selected from the group consisting of a bio-polyolefin resin derived from sugarcane by-product and a polylactic acid derived from starch. The bio resin is not only an eco-friendly resin having biodegradability, It is effective. The rice flour adhesive and the bio-resin may be compounded at a weight ratio of 30:70 to 100: 0, a weight ratio of 35:65 to 90:10, or a weight ratio of 55:45 to 80:20, can do.

The bio-polyolefin resin may be a product available as a bio-polyethylene resin or a bio-polypropylene resin.

The panel fixing tool may have at least one slit groove formed in its inner periphery. The slit grooves may facilitate separation of the manufactured wood panel from the panel fixture, or may facilitate subsequent joining between the wood panels.

The pressure drying and the step of obtaining a wood panel (S3) is a step of pressing the sawdust or wood pieces subjected to the planarizing step to obtain a wood panel. The press drying may be performed by manually pressing the upper panel with a crimped top plate as a panel fixing tool used in the second step, and the panel frame used in the second step may be separately It is possible to perform pressurization to a pressure range necessary for adhesion by using an appropriate upper plate.

Subsequently, the vegetable oil immersion step (S4) is a step of immersing the obtained wood panel in vegetable oil or applying vegetable oil to the wood panel. Such immersion or application may use the vegetable oil itself or the water containing 0.5 to 95% by weight of the vegetable oil. The vegetable oil is an oil extracted from plants, plant seeds, or trees, which can be used in the above-mentioned first step, independently from each other, and is selected from the group consisting of urushiol oil, linseed oil, palm oil, coconut oil, castor oil, Jojoba oil, safflower oil, macadamia oil, and olive oil may be used. It is preferable to use urushiol oil, linseed oil, or palm oil in consideration of atopic dermatitis and moisture resistance. have. However, in the case of immersion, the extract of the plant component may be used in place of the used amount. At this time, as an extract of the plant component, at least one of the leaves, fruits, roots and stems of the woody plant extract, for example, is extracted with an alcohol or an alcohol aqueous solution, and the plant ingredient raw material and the extracting solvent are extracted at a ratio of 1: : 10 by weight, and the mixture can be extracted at room temperature or warmed for 5 to 10 hours. The room temperature extraction can be carried out at 80 to 150 ° C for 1 to 50 minutes.

It is possible to provide flame retardancy and flame retardancy required for furniture by further including a flame retardant agent in the above-mentioned immersion in vegetable oil or application of vegetable oil. The flame retardant may be, but not limited to, a water flame retardant obtained by mixing ammonium phthalate, boric acid, and ammonium hydroxide in a weight ratio of 1: 10: 1 to 10: 1 to 5, It is preferable that 0.1 to 20% by weight, or 1 to 10% by weight, based on the total weight of the vegetable oil (or the extract of the plant component) is considered in consideration of environmental friendliness, flame retardancy and flame retardancy.

In this case, the immersion or coating treatment may be performed once or repeatedly as needed, and the immersion or application conditions are not specifically specified. However, if the immersion is carried out at room temperature for 1 to 60 minutes or for 10 to 35 minutes Can be sufficiently impregnated. Drying after the immersion treatment can be carried out in a conventional manner, for example, air drying at room temperature. It is more preferable to use spraying or the like for partial application after immersion.

Further, the present invention may further include a finishing step of attaching a protective paper to the outer surface of the above-described joint workpiece, if necessary. Here, the finishing sheet can prevent scratches or the like from being generated on the outer surface of the wood panel when the wood panel is moved.

The resulting wood panel can be made of eco-friendly furniture using the above-mentioned two-component adhesive liquid when manufacturing furniture. As a concrete example of the furniture production, the above-mentioned two-component adhesive liquid may be applied to a wood panel, and then the wood panel and another wood panel may be overlapped with each other in an odd number of layers and heated and pressed.

The eco-friendly furniture can be applied to a variety of materials known as environmentally friendly paints. The eco-friendly wood panel is manufactured by replacing the formaldehyde-based adhesive, which is commonly used in producing wood chips and wood chips, And penetrates into the interior and exterior of the wooden panel at the same time and leaves it at the same time to prevent the external emission of harmful substances such as formaldehyde or total volatile organic compounds from the wood panel and to prevent the internal influx of the moisture and harmful substances, Can be prevented.

Hereinafter, the structure of the present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to the following examples, but includes modifications of equivalent technical ideas.

Example 1

Referring to Fig. 1, as step S1, sawdust or piece of wood is washed and a hot air drying step is carried out. And may further include a washing liquid removing step (not shown).

Specifically, sawdust or wood pieces having particles of a certain size as much as possible were prepared, and natural urushiol oil and linseed oil, which were commercially available as vegetable oil, were individually prepared and blended at a weight ratio of 1: 1. The sawdust or pieces of wood were washed with the vegetable oil blend to remove fine dust and the like, followed by hot air drying at 45 to 55 ° C.

Subsequently, as step S2, a panelized wood pelleting and pulverizing step of powdered sawdust or wood pieces is carried out. Specifically, the hot-air-dried sawdust or wood pieces described above were pulverized into fine particles of about 20 mesh.

Then, as the adhesive derived from rice flour, 1 to 5% by weight of the polyvinyl alcohol, 10 to 20% by weight of the rice flour and 10 to 40% by weight of the isocyanate compound are added to the total weight of the two-component adhesive liquid, Then, the binder A was prepared and mixed at a weight ratio of powdered sawdust or wood flakes of 5 to 6.5: soil flour 1 to 2: binder A 0.5 to 1.5. The mixture was placed in a panel (1220 cm x 1440 cm x 15 mm) for panel making and planarized by spreading evenly.

Subsequently, as step S3, pressure drying and wood panel obtaining steps are carried out. Specifically, sawdust or a piece of wood that has been subjected to the planarization step is manually pressed to a pressure range necessary for adhesion by a crimped top plate to obtain a wood panel.

Then, as step S4, a vegetable oil immersion step (S4) is performed. Concretely, the wood panel obtained in the above-mentioned blend of 1: 1 weight ratio between the extract of the plant component having the oil component as it is or the oil composition used in the above step S1 was immersed for 30 minutes and then hot air-dried at room temperature.

The above procedure was repeated to produce five pieces of wood panel, and formaldehyde emission amount and total volatile organic compound (TVOC) content were measured on the obtained wood panel. In addition, one of the prepared wooden panels was coated with a binary adhesive liquid prepared as binder A, and another piece of wood panel was laminated, heated and pressed, and then bonded to each other. Then, the amount of formaldehyde emission and total volatile organic Compound (TVOC) content was measured.

As a result, formaldehyde and total volatile organic compounds (TVOC) contents were significantly reduced for wood panels and bonded joints made from sawdust or wood chips after immersion treatment compared to formaldehyde and total volatile organic compounds . Specifically, after the immersion treatment and the joint work, the TVOC emission amount is 72 ~ 136 ㎍ / m ² .h, and the TVOC emission (4,000 ㎍ / m ² .h) of the general building materials established by the Ministry of Environment and the air cleaning association were satisfied all of the best grade standards of eco mark HB rating, toluene emission is passed through a 0.32-MOE reference 80㎍ / m ² .h in 49.5 ㎍ / m ² .h.

Comparative Example 1

Formaldehyde emission and total volatile organic compound (TVOC) content were measured for sawdust or wood chips before the production of the wood panel in the step S1 of Example 1, followed by two sheets of MDF wood panels manufactured using the formaldehyde adhesive (B), and then another piece of wood panel was laminated and heated and pressed to bond them to each other. Then, formaldehyde emission amount and total volatile organic compound (TVOC) were measured in the same manner for the bonded workpiece, And the content thereof was measured.

Sawdust or wood carvings, and MDF wood panels did not meet the highest grade of the environmentally friendly HB mark certified by the Air Cleaning Association as described in Example 1 above, and the toluene emission was also 80 ㎍ / m ² , And even if an environmentally friendly binder was applied thereto, the amount of toluene emission was found to be lower than that of the Ministry of Environment. However, in the case of the environmentally friendly HB mark certified by the Air Cleaning Association It was confirmed that it did not meet the highest grade criteria.

Example 2

The same procedure as in Example 1 was repeated except that the binder A was replaced with the binder B prepared in the following manner in the step S2 of Example 1 to obtain a wood panel for eco-friendly furniture and a bonded workpiece. Specifically, the binder B is an adhesive derived from rice flour containing 1 to 5% by weight of the polyvinyl alcohol, 10 to 20% by weight of the rice flour, 10 to 40% by weight of the isocyanate compound, (Bio-PE) derived from sugar cane by-product was blended in a weight ratio of 90:10 (bi-component adhesive liquid: resin) to prepare a two-component adhesive liquid.

Then, formaldehyde emission and total volatile organic compound (TVOC) contents were measured for the wood panel and the joint work in the same manner as in Example 1. [ As a result, it was confirmed that the content of formaldehyde and total volatile organic compound (TVOC) were greatly reduced after the immersion treatment in the same manner as in Example 1, and the content of formaldehyde and total volatile organic compound (TVOC) It can be confirmed that all of them are greatly reduced.

Specifically, after the immersion treatment and the joint work, the TVOC emission amount is 72 ~ 136 ㎍ / m2.h, and the TVOC emission amount (4,000 ㎍ / m ² .h) It satisfies all of the highest grade standards of environmentally friendly HB mark certification. Toluene emission was 0.32 ~ 49.5 ㎍ / m ² .h and passed the Ministry of Environment standard 80 ㎍ / m ² .h.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Therefore, the embodiments described in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (4)

A first step of washing sawdust or pieces of wood with water or vegetable oil, followed by hot air drying at 45 to 55 ° C;
After drying by hot air, it is pulverized into fine particles of about 15 to 25 mesh, and then mixed with sawdust or wood chips at a weight ratio of 5 to 6.5: ground flour 1 to 2: 0.5 to 1.5 of an adhesive derived from rice flour and placed in a panel fixture, step;
A third step of pressing the sawdust or pieces of wood through the planarizing step to obtain a wood panel; And
And a fourth step of immersing the obtained wood panel in vegetable oil,
The vegetable oils of the first and fourth stages are oils extracted from plants, seeds of plants or trees, and can be used independently of one another to produce a mixture of urushiol oil, linseed oil, palm oil, coconut oil, castor oil, grapeseed oil, jojoba oil, Safflower oil, macadamia oil and olive oil,
In the second step, the adhesive derived from the rice flour contains a long fiber and a biocomponent in an aqueous bicarbonate solution prepared by adding an isocyanate compound to an aqueous solution containing polyvinyl alcohol, water and a fine powder.
Wherein the aqueous bicarbonate solution comprises water in an amount of from 1 to 5% by weight of polyvinyl alcohol, from 10 to 20% by weight of rice flour, from 10 to 40% by weight of an isocyanate compound and a balance of water, based on the total weight of the bicarbonate aqueous solution,
Wherein the long fiber is selected from the group consisting of corn fiber, coconut fiber, palm fiber fiber, bamboo, reed, rice straw, cotton, hemp, natural fiber including dog, glass fiber, carbon fiber and nylon, Derived bio-polyolefin resin and starch-derived polylactic acid,
The bicomponent aqueous solution and the long fiber are blended in a weight ratio of 55:45 to 80:20 and the bicomponent aqueous solution and the bio resin are blended in a weight ratio of 55:45 to 80:20,
The method of manufacturing a wood panel for eco-friendly furniture according to claim 1, further comprising a water flame retardant obtained by mixing ammonium phthalate, boric acid and ammonium hydroxide in a weight ratio of 1: 10: 1 to 10: 1 to 5. delete delete delete

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