KR101114564B1 - Processing method for furniture board using korean paper - Google Patents

Abstract

PURPOSE: A processing method for furniture board using Korean paper is provided to have clear texture, and not to emitting harmful materials. CONSTITUTION: A processing method for furniture board using Korean paper comprises: a step of coating a plate surface by mineral paint, and drying the same; a step of polishing the surface of paint; a step of spreading a water based adhesive and a Korean paper on the surface of the plate material pressurizing of 150-250 ton at 100-120 °C; a step of coating the surface of the Korean paper by inorganic paint and drying; and a step of polishing the surface of the paint. The inorganic paint contains polyurethane, dimethylpolysiloxane, and silica. The thickness of the spread inorganic paint is 0.1-10.10% of the thickness of a Korean paper. The water based adhesive contains jade powder.

Description

PROCESSING METHOD FOR FURNITURE BOARD USING KOREAN PAPER}

The present invention relates to a sheet material processing method for furniture, and more particularly to a method of processing a plate material excellent in hardness, scratch resistance, durability and appearance by appropriately adjusting the processing conditions in the sheet material processing using Hanji.

In general, as a material of the plate used for building or furniture, synthetic wood such as solid wood (natural wood), MDF, PB, aggregate wood, etc. are mainly used, and recently, metal plate is also used. It is done. However, in the case of solid wood, the shape is diverse and there is a limit in size, so that the workability as a plate for building and furniture is quite difficult, and the size is limited, and the price is generally expensive, so it is not expensive for expensive building and furniture. There is a disadvantage in that a significant economic burden to use widely applied universally.

Accordingly, various methods of manufacturing furniture by applying hanji with antique and subtle fashion to plate materials have been developed. Specifically, in relation to furniture using Korean paper, Korean Laid-Open Patent Publication No. 10-2006-0002543, "Glyph expression method of furniture using Korean paper and furniture by the method" and Korean Patent Publication No. 10-2005-0121072 "How to make wooden furniture decorated with Hanji" and the like.

However, until now, the furniture manufacturing method using hanji has a problem that the hardness and durability of the furniture is lowered, and the natural texture of hanji is not properly expressed.

The present invention has been made to solve the above problems, while using the eco-friendly material in the processing of the plate and appropriately adjusting the process conditions while applying hanji to the plate is excellent in hardness, scratch resistance and durability, plate surface homogeneity, light transmittance And because of the excellent dispersibility, the texture of Korean paper is clearly expressed, the appearance is high, and environmentally harmful substances are not discharged.

According to one aspect of the invention, (a) coating the surface of the plate with an inorganic paint and drying; (b) polishing the paint surface; (c) applying a water-based adhesive on the surface of the plate and attaching a paper and applying a pressure of 150 to 250 tons at 80 ~ 150 ℃; (d) coating and drying the hanji surface with an inorganic paint; And (e) polishing the surface of the paint; relates to a furniture plate processing method comprising a.

In the present invention, the drying process in the step (a) and step (d) may be carried out at 60 ~ 80 ℃.

In the present invention, the step (d) and step (e) may be repeated 2 to 5 times.

After the step (e) in the present invention, (f) the step of finally drying the polished plate at 60 ~ 80 ℃; may further include.

In one embodiment of the present invention, the inorganic paint in the step (a) and step (d) may be a nano ceramic paint. The inorganic paint may contain polyurethane, dimethylpolysiloxane and silica.

In one embodiment of the present invention the hanji may have a basis weight of 25 ~ 60g / m ² .

In the present invention, the aqueous adhesive may contain jade powder.

Furniture plate according to the present invention has a clear appearance of the Hanji texture representation is good appearance, has excellent hardness, scratch resistance, durability, and does not emit harmful substances such as volatile organic compounds, there is an environmentally friendly advantage.

Furniture plate processing method of the present invention comprises the steps of (a) coating the surface of the plate with an inorganic paint and drying; (b) polishing the paint surface; (c) applying a water-based adhesive on the surface of the plate and attaching a paper and applying a pressure of 150 to 250 tons at 80 ~ 150 ℃; (d) coating and drying the hanji surface with an inorganic paint; And (e) polishing the paint surface.

Hereinafter, the configuration of the present invention in more detail.

(a) sheet surface coating step

The step (a) is a process of coating and drying the surface of the plate with an inorganic paint, which serves to significantly improve the adhesion performance of the hanji in the subsequent application of the aqueous adhesive and to enhance the durability of the plate.

In the present invention, the plate is not particularly limited as long as it is a conventional plate used in the manufacture of furniture, preferably can be used plywood of eco-friendly material containing rice straw, more preferably use a plywood containing 95% or more rice straw Can be.

The inorganic paint may use a conventional inorganic paint applicable to the plate, the inorganic material is a metal oxide including SiO ₂ , Al ₂ O ₃ , MgO, CaO, Al (OH) ₃ , TiO ₂ and ZrO _2, etc. , Metal phosphate, alkali silicate and the like can be used, and preferably, nano ceramic paints in which inorganic materials are nanoparticles can be used. Nanoparticles inorganic material may have a particle size of 10 ~ 200nm.

For example, the inorganic material may be used by forming a liquid coating liquid by dispersing it in alcohol or water with silica as a main component, or by preparing an organic-inorganic hybrid form. When the inorganic paint prepared in the liquid form is coated on a plate, the solvent is volatilized during the drying process, and only the inorganic component is coated on the substrate to improve the hardness, durability, scratch resistance, and abrasion resistance of the plate through the inorganic material component. . In this step, by forming a fine coating on the surface of the plate through the inorganic material coating to enhance the durability of the plate while improving the adhesion performance with the water-based adhesive when attaching the Hanji and serves to prevent dust from rising from the plate.

In addition, the inorganic paint may specifically contain polyurethane, dimethylpolysiloxane and silica. At this time, each component included in the inorganic paint may be included as 80 to 120 parts by weight of dimethylpolysiloxane, 3 to 10 parts by weight of silica based on 100 parts by weight of polyurethane. In addition, when the solvent is included in the inorganic paint may be included in 20 to 50 parts by weight based on 100 parts by weight of polyurethane. In this content range, it is possible to expect the effect of improving the plate durability and the paper. Silica constituting the inorganic coating can be used by nano-particles in terms of coating performance and plate durability enhancement.

The coating is applied to spread the inorganic paint widely on the surface of the plate, it can be applied by a roller, brush or spray method, the coating amount can be 10 ~ 1000㎛ thickness, preferably 50 ~ 300㎛.

After the coating operation, the drying process may be performed at 60 to 80 ° C. for about 10 to 15 minutes, and the drying operation may be performed by passing a plate to a conveyor system (degree). Through this drying operation, the solvent in the inorganic paint is volatilized and the inorganic and resin components remain attached to the plate surface. The rapid curing of the coating film at such a drying temperature and time range can be prevented to prevent coating film cracking and impart appropriate hardness to the plate.

(b) paint surface polishing step

Step (b) is a process of enhancing the surface uniformity of the coating by grinding the surface of the plate in the state of coating with the inorganic paint in the step (a). Through such a polishing process, the coating state of the paint can be evenly applied, and the adhesion of Hanji is improved, and there can be no impurities between the paper and Hanji when the Hanji is bonded, and the surface of the plate can be smoothed.

The polishing process may be polished by a rolling method using sand paper, for example, sand paper of the mesh number # 200 ~ 350, preferably sand paper of # 250 ~ 300.

(c) Hanji Attachment Step

The step (c) is made by applying a water-based adhesive to the surface of the plate coated with paint through the steps (a), (b) and then attach the hanji and apply the pressure of 150 ~ 250 tons at 80 ~ 150 ℃ Is a process to be attached to the surface of the plate.

Hanji that can be used in the present invention is not particularly limited as long as it is a conventional Korean paper that can be used in furniture manufacturing, but preferably one having a basis weight of 25 to 60 g / m ² , and more preferably 30 to 40 g / m ² Can have When it has a basis weight range, it is possible to firmly attach to the plate while minimizing damage to the Hanji, and to secure the appropriate hardness and durability when attached to the plate.

In this step, in order to further enhance the beautifulness of the paper or the performance of attaching the paper, after attaching the inlay before attaching the paper after applying the water-based adhesive, the water-soluble adhesive may be applied on the upper surface of the inlay, and then the paper may be attached.

The aqueous adhesive may be used a conventional aqueous adhesive used for sheet processing, for example, an aqueous solution of sodium silicate, aqueous acrylic solution, aqueous vinyl acetate, aqueous solution of ethylene vinyl acetate may be used alone or in combination. In addition, the aqueous adhesive may preferably contain jade powder. The jade powder may comprise 0.1 to 5% by weight relative to the total weight of the adhesive, in which case it exhibits far-infrared radiation and antibacterial activity.

The aqueous adhesive application may be applied by a roller, a brush or a spray method, the coating amount is preferably adjusted to a degree that can be attached in a flat state without crying or inlay.

The Hanji attachment process may be carried out by applying the pressure of 150 ~ 250 tons at 80 ~ 150 ℃, and then to attach the Hanji to the surface of the plate using a roller, through this process the aqueous adhesive in a high temperature and high pressure environment As it is hardened, the Hanji is firmly attached to the surface of the sheet, and it is possible to secure the cross-sectional stability of the surface on which the Hanji is attached and the hardness of the sheet is improved. The temperature and pressure is preferably 100 ~ 120 ℃, 180 ~ 230 tons, in this temperature and pressure range can be secured firmly attached to the plate, cross-sectional stability and appropriate level of plate hardness and durability without damage.

(d) Hanji surface coating step

Step (d) is a process of enhancing the hardness, scratch resistance and durability of the plate by coating and drying the surface of the hanji attached in step (c) with an inorganic paint. In addition, when coating with an inorganic paint, the light transmittance and the dispersibility of the surface of the plate is high, the texture of Hanji is enhanced. The type and application method of the inorganic paint are as described above in the step (b). In addition, in order to increase the expressive power of the texture of the hanji, it is preferable to use the inorganic paint is a transparent color. The coating amount of the inorganic paint may be about 0.1 to 10.0% of the thickness of the Hanji, preferably 0.3 to 1.0%, more preferably 0.3 to 0.6% of the coating can be formed.

After the coating operation, the drying process may be performed at 60 to 80 ° C. for about 10 to 15 minutes, and the drying operation may be performed by passing a plate to a conveyor system (degree). In this drying temperature and time range it is possible to prevent the rapid curing of the coating film to prevent the coating film cracking to improve the surface appearance of the finished product, it is possible to impart the appropriate hardness to the plate. Through this drying operation, the solvent in the inorganic paint is volatilized and the inorganic and resin components remain attached to the surface of the hanji, which enhances the surface hardness and scratchability of the plate.

(e) Paint surface polishing step

In the step (e), the surface of the plate coated with the inorganic paint is polished in the step (d) to enhance the surface uniformity of the paint to increase the appearance of the plate. The polishing method is as described above in step (b).

The plate processing method of the present invention may be repeated two to five times the step (d) and step (e). When the above process is repeated, physical properties such as hardness, scratch resistance and durability of the plate may be further improved.

In addition, after the step (e) in the present invention, (f) finally drying the polished plate at 60 ~ 80 ℃; may further include. Through this final drying step, the plate of the present invention is a complete drying of the surface coating film and the coating film stability is improved to prevent damage to the external impact of the plate surface, and the appropriate level of appearance of the plate (hanji texture, pattern expression and Coating film surface state), hardness and scratch resistance can be ensured.

[ Example ]

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Example  1 ~ 2, Comparative example  1 ~ 2. Furniture board manufacturing

Example  One

The plate was manufactured through the following procedure.

1. Plate cutting: In order to maintain the quality of the edge of the final product, the plate was cut with about 20mm width * length than the design drawing. At this time, plywood containing 95% or more of straw was used as the plate.

2. Inorganic paint coating on the plate: Before the Hanji gluing operation, it was coated with an inorganic paint to form a fine coating on the plate. Ceramic inorganic paints (30% by weight of polyurethane, 30% by weight of dimethylpolysiloxane, 13% by weight of water, and 2% by weight of silica) were used as the inorganic paint, and the coating was applied to have a thickness of about 50 μm.

3. Heat drying: The plate was passed through the inside of the heating box (conveyor system) in which the intrinsic temperature was maintained at 60 to 80 ° C. for 15 minutes to dry the fine coating film.

4. Surface Polishing: The plated surface was sanded (polished) with # 250 sandpaper roller to maintain the uniformity of the surface before bonding the plate passed through the hotbox drying furnace.

5. Hanji Adhesive: A plate finished with primary processing as above was loaded on the ascending cylinder, and the hanji for the surface decoration of the furniture was bonded through a roller.

6. Heating press preheating: In order to harden the aqueous bond by attaching Hanji and to secure the cross-section stability of the plate, heat and pressure was applied in the pressurized heating press, which was worked for about 30 seconds at a pressure of about 200 tons and a heating temperature of 110 ℃. .

7. Inorganic paint coating: In the final finishing of the surface to form a coating film on the plate with the inorganic paint (the same paint used in step 2) to form a coating film about 0.5% of the thickness of the hanji.

8. Heat drying: The plate was passed through the inside of the heating box (conveyor system) in which the intrinsic temperature was maintained at 60 to 80 ° C. for 15 minutes to dry the fine coating film.

9. Surface Polishing: Sanding was carried out with # 250 sandpaper roller in a process for securing the uniformity of the coating film of the plate passed through the heat-drying furnace.

10. Drying booth drying: In order to secure the stability of the final product, the board was loaded on a trolley and put in a drying booth for final drying at 70 ° C. for 1 hour.

11. Steel plate foundation: 20 mm of allowance for drying the plate, which was completed in the above work, was cut to the standard.

Example  2

In Example 1, except that the steps 7 to 9 were repeated three times to prepare a plate material in the same manner as in Example 1.

Comparative example  One

In Example 1, a plate was manufactured in the same manner as in Example 1, except that the pressure of the pressurizing heating press in step 6 was performed for about 30 seconds at a pressure of about 100 tons and a heating temperature of 80 ° C.

Comparative example  2

Except that the step 2 and step 3 in Example 1 was omitted and proceeded to produce a plate material in the same manner as in Example 1.

Test Example . Plate property evaluation

<1> Evaluation of basic properties of sheet

With respect to the plate produced by the manufacturing method of Example 1, a request was made to evaluate the physical properties of the plate to the Korea Building Materials Testing Institute, the results are shown in Table 1.

result Test Methods Density (g / cm ² ) 0.72




KS F 3104: 2006





Flexural strength
One 15.5 2 15.7 Flexural strength when wet
One 6.3 2 6.4 Moisture content (%) 9 Absorption Thickness Expansion Rate (%) 3 Peel Strength (N / mm ² ) 0.27 Screw holding force (N)
plane 627 side 465 Formaldehyde Dissipation
(mg / L) Average Not detected maximum Not detected

As shown in Table 1, the plate produced by the processing method of the present invention exhibited a suitable density, bending strength, peel strength and screw holding force for furniture, it was confirmed that the environmentally friendly material is not released formaldehyde.

<2> hardness, Scratch resistance  And Appearance  evaluation

Hardness, scratch resistance, and appearance were evaluated for the plate materials of Examples 1 and 2 and Comparative Examples 1 and 2 above. The results are shown in Table 2.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Hardness (pencil hardness) 6H 8H 5H 5H Scratch resistance ◎ ◎ ○ ○ Appearance ◎ ◎ ○ △ * Scratch resistance evaluation standard: evaluates the degree of scratching with nails
◎: No scratch marks
○: Scratches occur at the level of 3% or less
△: scratch mark at 3 ~ 10% level
×: Scratches occur at 10% or more

* Appearance Evaluation Criteria
(Double-circle): It is excellent in expressing the texture of hanji with high coating film clarity, high homogeneity of coating film surface, and no crack at all.
○: The paint film clarity and the texture of the Hanji texture is good, and cracks occur around 0.01 ~ 1% on the surface of the film.
△: cracks occur in the surface of the coating film at about 0.1-10%

As shown in Table 2, the plates of Examples 1 and 2 according to the present invention were found to have superior hardness, scratch resistance, and appearance compared to those of Comparative Examples 1 and 2, which differ in some of the process conditions.

Claims (8)

(a) coating and drying the surface of the sheet with an inorganic paint;
(b) polishing the paint surface;
(c) applying a water-based adhesive to the surface of the plate and attaching a paper and applying a pressure of 150 to 250 tons at 100 to 120 ℃;
(d) coating and drying the hanji surface with an inorganic paint; And
(e) polishing the paint surface;
Including,
In step (a) and step (d) the inorganic paint contains polyurethane, dimethylpolysiloxane and silica,
The inorganic paint includes 80 to 120 parts by weight of the dimethylpolysiloxane and 3 to 10 parts by weight of the silica based on 100 parts by weight of the polyurethane,
In the step (d), the coating amount of the inorganic paint is 0.1-10.0% of the thickness of the Hanji,
In step (c) the aqueous adhesive contains jade powder,
The jade powder is 0.1-5% by weight based on the total weight of the aqueous adhesive processing method for furniture sheet. The method of claim 1,
The drying process in the step (a) and step (d) is a furniture plate processing method, characterized in that proceeding at 60 ~ 80 ℃. The method of claim 1,
Step (d) and step (e) is a furniture plate processing method, characterized in that it is performed 2 to 5 times. The method of claim 1,
After the step (e), (f) the final drying step of the polished plate at 60 ~ 80 ℃; furniture plate processing method further comprising a. delete delete The method of claim 1,
Hanji in the step (c) furniture sheet processing method characterized in that it has a basis weight of 25 ~ 60g / m ² . delete