KR20160071306A - The method of flameproof process for a medium density fiberboard or a plywood with sliced veneer - Google Patents

Abstract

The present invention relates to a flame retarding treatment method of a medium density fiberboard or plywood to which a laminated wood is adhered, and more particularly, to a method of flame retarding a medium density fiberboard or a laminated board by firstly applying a flame resistant adhesive to one surface of a medium density fiberboard (MDF) A second step of attaching vignetting to one side of the medium density fiberboard (MDF) or plywood to which the flame resistant adhesive is applied; Density medium fiberboard (MDF) or veneer sheet is placed between the heat plates of the press, the pressure and heat are applied to the heat plates of the press, and the medium density fiberboard (MDF) A third step; A fourth step of sanding one side of the laminated wood bonded to the medium density fiberboard (MDF) or the plywood with sandpaper; And a fifth step of coating a paint on one side of the trimmed veneer to form a coated film; The present invention relates to a flame retarding treatment method of a medium density fiber board or plywood to which a flock has been adhered, which has an effect of ensuring flame retardancy in the event of a fire and suppressing the generation of toxic gases.

Description

FIELD OF THE INVENTION The present invention relates to a flame-retardant fiber board or flame-retardant flame-retardant fiber board,

The present invention relates to a flame retarding treatment method of a medium density fiberboard (MDF) or a plywood to which a laminated wood is adhered, and more particularly, to a flame retardant treatment method of a medium density fiberboard (MDF) Density fiber board (MDF) or a laminated board to which flame-retardant wood is adhered, which is capable of suppressing the generation of toxic gases.

Wood is a material that is widely used in buildings such as houses because of its light weight and excellent processability, but it has a fatal disadvantage of being vulnerable to fire. If a fire occurs in the wood, the wood may be damaged due to high temperature and toxic gas generated while burning the wood.

In order to prevent such personal injury, it is required to use wood which is not burned as much as possible and does not release toxic gas as much as possible. In order to satisfy such demands, it is not easy to burn even if it is exposed to fire, There has been developed a flame-retardant treatment technology for wood which has an effect of reducing the damage of human life without increasing combustion.

This technique has a technique of applying a flame retardant containing melamine resin or the like to the surface of the wood, but it takes a long time for the flame-proofing process, which results in a problem that productivity is lowered.

As another flame retarding treatment technique, there is a technique of impregnating wood with a flame retardant containing boric acid, borax and the like, but the whole process is complicated because the processes such as pressurization, decompression and impregnation are repeated, , There is a problem that deformation of the wood may be caused by repeated pressurization and decompression.

As another flame retardant treatment technique, a thick medium-density fiberboard or plywood having a thickness of 6 to 12 mm among the indoor finishing materials of a building is adhered to the surface of the laminated wood with a flame-retardant paint or the like several times There is a technology for realizing flame-retardant performance by forming a coating film by coating. However, there has been a problem in that toxic gas is generated in the oil-based paint component and the adhesive agent in the fire-retardant paint which is thickly painted when a fire occurs, and there is a possibility of causing personal injury.

Accordingly, the present inventor has developed a flame-retardant treatment method of medium density fiberboard (MDF) or plywood to which flame retardant gypsum can be adhered, which can ensure flame retardancy at low cost and suppress the generation of toxic gas.

Patent Registration No. 10-1337594 (Registered on November 29, 2013) Registration Practical Utility Model No. 20-0398801 (registered October 10, 2005)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and an object of the present invention is to provide a method of coating a medium density fiberboard (MDF) Density fiber board (MDF) or a laminated board to which flame-retardant glued laminate is applied, which can reduce the generation of toxic gases and ensure an improved flame-retardant performance by performing flame retardant treatment.

In order to accomplish the above object, the present invention provides a method of manufacturing a medium density fiberboard (MDF) or plywood, comprising the steps of: applying a flame resistant adhesive to one side of a medium density fiberboard (MDF) A second step of attaching vignetting to one side of the medium density fiberboard (MDF) or plywood to which the adhesive is applied; Density medium fiberboard (MDF) or veneer sheet is placed between the heat plates of the press, the pressure and heat are applied to the heat plates of the press, and the medium density fiberboard (MDF) A third step; A fourth step of sanding one side of the laminated wood bonded to the medium density fiberboard (MDF) or the plywood with sandpaper; And a fifth step of coating a paint on one side of the trimmed veneer to form a coated film; And the like.

The flame-retardant adhesive preferably includes about 70 to about 85% by weight of the emulsion polyacrylic resin and about 15 to about 30% by weight of the ammonium polyphosphate. When the thickness of the laminated wood is about 0.10 to 0.14 mm, The coating amount is preferably about 120 to 180 g / m 2.

It is preferable that the coating material is a general clear coating material, a UV transparent coating material or a flame-retardant transparent coating material.

Preferably, the coating thickness of the general transparent coating material is about 0.02 to 0.04 mm, the coating thickness of the UV transparent coating material is about 0.05 to 0.08 mm, and the coating thickness of the flame-retardant transparent coating material is about 0.02 to 0.04 mm.

On the other hand, if the thickness of the laminated wood is about 0.15 to 0.60 mm, the application amount of the flame-resistant adhesive is preferably about 240 to 300 g / m 2.

At this time, the coating material is preferably a flame retardant UV transparent coating material or a flame-retardant transparent coating material.

The coating thickness of the flame-retardant UV transparent coating material is preferably about 0.04 to 0.06 mm, and the coating thickness of the flame-retardant transparent coating material is preferably about 0.05 to 0.08 mm.

As described above, the present invention having the above-described structure is characterized in that the first flame retardant treatment is carried out between a medium density fiberboard (MDF) or a laminated board and a wood paneling as a finishing material, and a general paint is applied to a surface finish with vignetting, By adding the treatment, it is possible to ensure the flame-retardant performance in the event of fire, and to suppress the generation of toxic gas.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a process of a flame retarding treatment method of a medium density fiberboard (MDF) or plywood to which a laminated wood is adhered according to the present invention.
2 is a cross-sectional view of a medium density fiberboard (MDF) or plywood laminated with flame retarded wood by the method according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings and the like. The present invention relates to a flame retarding treatment method including a flame retarding treatment step between a medium density fiber board (MDF) or a laminated board and a laminate as a finishing material in order to improve the flame retardancy of a medium density fiber board (MDF) .

1 is a block diagram showing a process of a flame retarding treatment method of a medium density fiber board (MDF) or plywood to which a laminated wood is adhered according to the present invention, and Fig. 2 is a view showing a medium density Fiberboard (MDF) or plywood.

As shown in the drawings, the flame retarding treatment method of the MDF or the plywood with the laminated wood according to the present invention can be applied to a medium density fiberboard (MDF) or a laminated board 10 and a veneer (30) is attached to a medium density fiberboard (MDF) or plywood (10) by using a flame resistant adhesive (20) containing a flame retardant effect between the laminated wood (30) A transparent paint or a UV paint or the like is applied to the finish part where the coating film 40 is formed on the other surface of the coating film 40, and the second flame-resistant treatment is performed by applying a flame-retardant transparent paint or the like.

More specifically, the flame retarding treatment method such as the MDF or the plywood to which the laminated wood according to the present invention is adhered is characterized in that the flame retardant treatment method is applied to the surface of the medium density fiber board (MDF) step; A second step of attaching the vignetting 30 to one side of the medium density fiberboard (MDF) or the plywood 10 to which the flame resistant adhesive 20 is applied; Density medium fiberboard (MDF) or plywood (10) is placed between the heat plates of the press, and the heat and pressure are applied to the heat plates of the press, 10 and the vignetting 30 and drying the same; A fourth step of sanding one side of the laminated wood 30 adhered to the medium density fiberboard (MDF) or plywood 10 using sandpaper; And forming a coating film (40) by applying paint on one side of the trimmed veneer; And the like.

In the first step, the flame-retardant adhesive 20, which is applied to one side of the MDF or the plywood 10, is flame-retardant, 85% by weight of ammonium polyphosphate, and about 15 to 30% by weight of ammonium polyphosphate. The emulsion polyacrylic resin is about 75% by weight and the ammonium polyphosphate is about 25% by weight.

The thickness of the laminated wood 30 attached to one side of the medium density fiberboard MDF or plywood 10 coated with the flame resistant adhesive 20 may be about 0.10 to 0.14 mm which is relatively thin. At this time, the application amount of the flame-retardant adhesive 20 applied between the MDF or the laminated board 10 and the laminated wood 30 by the roll or spray method is preferably about 120 to 180 g / m 2. Here, when the thickness of the vignette 30 is less than about 0.10 mm, the thickness of the vignette is too thin to be practically usable.

Meanwhile, in the fifth step, the paint applied to form the coating film 40 on one side of the vignette 30 is preferably a general transparent paint, a UV transparent paint or a flame-retardant transparent paint, To 2 times, and the UV clear coating is applied about 2 times to 3 times, and the flame retardant clear coating is applied about once or twice.

In particular, when the paint applied to one side of the vignette 30 is a general transparent paint, the thickness of the general transparent paint is preferably about 0.02 to 0.04 mm, and the paint coated on one side of the vignette 30 In the case of a UV transparent coating, the coating thickness of the UV transparent coating is preferably about 0.05 to 0.08 mm. When the coating applied on one side of the vignette 30 is a flame-retardant transparent coating, the coating thickness of the flame- And is preferably about 0.02 to 0.04 mm.

On the other hand, the thickness of the laminated wood 30 attached to one side of the medium density fiberboard MDF or plywood 10 coated with the flame resistant adhesive 20 may be about 0.15-0.60 mm which is relatively thick. At this time, the application amount of the flame-retardant adhesive 20 applied between the plywood 10 and the laminated wood 30 by the roll or spray method is preferably about 240 to 300 g / m 2 .

In this case, in the fifth step, the coating material applied to form the coating film 40 on one side of the laminated wood 30 is preferably a flame retardant UV transparent coating material or a flame-retardant transparent coating material, preferably about two to three times Do.

Particularly, when the coating applied to one side of the vignette 30 is a flame retardant UV transparent coating, the coating thickness of the flame retardant UV transparent coating is preferably about 0.04 to 0.06 mm, When the coating material is a flame-retardant transparent coating material, the coating thickness of the flame-retardant transparent coating material is preferably about 0.05 to 0.08 mm.

[Example]

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and that the scope of the present invention is not construed as being limited by these embodiments.

Flame-proofing tests were conducted to confirm the flame retardancy of the examples to which the flame-retarding treatment method according to the present invention was applied.

division Brine Time
(second)
By: 5 seconds
Within Burst time
(second)
By: 30 seconds
Within Carbonization length
(Cm)
Standard: 20 cm
Within Carbonized area
(㎠)
Standard: 50㎠
Within Smoke density
(DS)
By: 400DS
Within Example 1 0 0 7.4 32 280 Example 2 0 0 7.6 34 280 Example 3 0 0 8 38 310 Example 4 0 0 6.8 28 270 Example 5 0 0 7.2 30 280 Example 6 0 0 7.6 34 320 Example 7 0 0 6.2 22 220 Example 8 0 0 6.6 23.2 230 Example 9 0 0 7 24 245 Comparative Example 1 3 25 22.5 55 430 Comparative Example 2 3 28 16 46 450 Comparative Example 3 2 21 18 49 420 Comparative Example 4 - - - - - Comparative Example 5 - - - - - Comparative Example 6 - - - - -

Table 1 is a table comparing the time of decay, the length of decay, the length of carbonization, the area of carbonization, and the smoke density of flame retardant treated and comparative flame retarded according to the present invention.

More specifically, in Examples 1 to 3 of Table 1, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coverage of about 120 g / m 2, the laminated wood of about 0.12 mm thick was adhered and adhered, A general transparent paint was applied on one side of the vignette with a thickness of about 0.03 mm.

In Examples 4 to 6, a flame resistant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coverage of about 120 g / m 2, and then a laminated wood of about 0.12 mm in thickness was adhered and adhered. Then, A transparent paint was applied to a thickness of about 0.06 mm.

In Examples 7 to 9, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coverage of about 120 g / m 2, a laminate of about 0.12 mm thick was adhered and adhered, A transparent paint was applied to a thickness of about 0.03 mm.

On the other hand, in Comparative Example 1, a flame-retardant adhesive was applied to one side of a medium density fiberboard (MDF) at a coverage of about 100 g / m 2, followed by adhering and adhering a veneer of about 0.12 mm in thickness. To a thickness of about 0.03 mm.

In Comparative Example 2, a flame resistant adhesive was applied to one side of a medium density fiberboard (MDF) at a coating amount of about 100 g / m 2, a laminated wood of about 0.12 mm in thickness was adhered and adhered, To a thickness of about 0.06 mm.

In Comparative Example 3, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 100 g / m 2, a laminated wood of about 0.12 mm thick was adhered and adhered, To a thickness of about 0.03 mm.

In Comparative Example 4, a flame resistant adhesive was applied to one side of a medium density fiberboard (MDF) at a coating amount of about 200 g / m 2, and then a laminated wood of about 0.12 mm in thickness was adhered and adhered. Next, To a thickness of about 0.03 mm.

In Comparative Example 5, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 200 g / m 2, followed by adhering and bonding a veneer of about 0.12 mm in thickness. To a thickness of about 0.06 mm.

In Comparative Example 6, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 200 g / m 2, and then a laminate having a thickness of about 0.12 mm was adhered and adhered. To a thickness of about 0.03 mm.

On the other hand, the flame retardant performance of medium density fiber board or plywood should satisfy Article 20, Clause 2 of the Enforcement Decree of the Fire Service Installation and Maintenance Law. More specifically, the flame retardancy shall be less than 5 seconds, Cm, a carbonization area of 50 cm 2 or less, and a smoke density of 400 DS or less.

Here, the above-mentioned flushing time is a time from the time when the flame is removed from the burner to the end of the burning of the embodiment after the embodiment is exposed to the flame of the burner for 2 minutes. The residence time is the time from when the flame is removed from the burner to the time when the smoke generated in the embodiment is completely removed after the embodiment is exposed to the flame of the burner for 2 minutes. The carbonization length is the carbonized length of the example after the measurement of the residual salt time and the residual time, and the carbonation area is the carbonized area of the embodiment, and the smoke density is the optical density of the smoke generated in the embodiment.

As a result of the test, in all of Examples 1 to 9, since the residual salt time and the decay time were 0 seconds, the residual decay time which should be within 5 seconds and the decay time which should be within 30 seconds were satisfied, And the smoke density should be within 400DS.

However, in Comparative Examples 1 to 3, the applied amount of the flame-retardant adhesive was too small as compared with the thickness of the laminated wood, and the flame-retardant adhesive did not sufficiently penetrate into the laminated wood. It was confirmed that the carbonization length, carbonization area or smoke density did not satisfy the reference value.

In addition, in the case of Comparative Examples 4 to 6, since the amount of the flame retardant agent was relatively increased due to the application amount of the flame-retardant adhesive agent which was excessively increased, the adhesiveness of the overall flame-retardant adhesive agent was deteriorated and the lamellar wood was separated from the MDF , The flame retardant performance test could not be carried out.

division Brine Time
(second)
By: 5 seconds
Within Burst time
(second)
By: 30 seconds
Within Carbonization length
(Cm)
Standard: 20 cm
Within Carbonized area
(㎠)
Standard: 50㎠
Within Smoke density
(DS)
By: 400DS
Within Example 10 0 0 6 22.8 280 Example 11 0 0 6.6 23 290 Example 12 0 0 7 24.5 305 Example 13 0 0 6.4 23.2 305 Example 14 0 0 6.8 23.6 310 Example 15 0 0 7.2 24.6 320 Comparative Example 7 2 16 23.3 54 430 Comparative Example 8 3 20 25.1 61.7 465 Comparative Example 9 - - - - - Comparative Example 10 - - - - -

Table 2 is a table comparing flame retardancy, burning time, carbonization length, carbonization area and smoke density of flame retardant treated and comparative example, which includes a leaflet having a thickness of about 0.3 mm.

More specifically, in Examples 10 to 12 of Table 2, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 240 g / m 2, the laminated wood of about 0.3 mm thick was adhered, A one-sided flame-retardant UV clear coating was applied to a thickness of about 0.06 mm.

In Examples 13 to 15, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 240 g / m 2, a laminated wood of about 0.3 mm in thickness was adhered, To a thickness of about 0.06 mm.

On the other hand, in Comparative Example 7, a flame resistant adhesive was applied to one side of a medium density fiberboard (MDF) at a coating amount of about 220 g / m 2, a laminated wood of about 0.3 mm in thickness was adhered, To a thickness of about 0.06 mm.

In Comparative Example 8, a flame-retardant adhesive was applied to one side of a medium density fiberboard (MDF) at a coating amount of about 220 g / m 2, and then a laminated wood of about 0.3 mm in thickness was adhered. 0.06 mm thick.

In Comparative Example 9, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 320 g / m 2, the laminated wood of about 0.3 mm in thickness was adhered, To a thickness of about 0.06 mm.

In Comparative Example 10, a flame-retardant adhesive was applied to one surface of a medium density fiberboard (MDF) at a coating amount of about 320 g / m 2, a laminated wood of about 0.3 mm in thickness was adhered, 0.06 mm thick.

As a result of the test, since the decay time and the decay time were 0 seconds in all of Examples 10 to 15, the decay time required to be within 5 seconds and the decay time to be within 30 seconds were satisfied. And the smoke density should be within 400DS.

In Comparative Examples 7 and 8, since the applied amount of the flame-retardant adhesive was too small as compared with the thickness of the laminated wood, the flame-retardant adhesive did not penetrate sufficiently into the laminated wood, It was confirmed that the carbonization length, carbonization area and smoke density did not satisfy the reference values.

In the case of Comparative Examples 9 and 10, since the amount of the flame retardant agent was relatively increased due to the application amount of the flame-retardant adhesive agent, which was excessively increased, the adhesiveness of the overall flame-retardant adhesive agent was deteriorated and the lamellar wood was separated from the MDF , The flame retardant performance test could not be carried out.

division Brine Time
(second)
By: 5 seconds
Within Burst time
(second)
By: 30 seconds
Within Carbonization length
(Cm)
Standard: 20 cm
Within Carbonized area
(㎠)
Standard: 50㎠
Within Smoke density
(DS)
By: 400DS
Within compatibility
Whether Example 16 0 0 7.4 32 280 fitness Example 17 0 0 7.6 34 310 fitness Example 18 0 0 8 38 340 fitness Comparative Example 11 0 6 8.6 52 380 incongruity Comparative Example 12 2 28 9.4 56 420 incongruity Comparative Example 13 4 36 10.2 62 460 incongruity

Table 3 is a table comparing the residual salt time, residual time, carbonization length, carbonization area and smoke density of the examples and comparative examples to which the contents of the polyacrylic resin and the ammonium polyphosphate according to the present invention were applied.

In Examples 16 to 18, a flame-retardant adhesive containing about 75% by weight of emulsion polyacrylic resin and about 25% by weight of ammonium polyphosphate was applied to one side of a medium density fiberboard (MDF) at a coverage of about 120 g / mm thick veneer was adhered and adhered, and then a flame-retardant transparent paint was applied to one side of the veneer to a thickness of about 0.03 mm.

On the other hand, in Comparative Examples 11 to 13, a flame-retardant adhesive containing about 87% by weight of emulsion polyacrylic resin and about 13% by weight of ammonium polyphosphate was coated on one side of a medium density fiberboard (MDF) at a coverage of about 120 g / A veneer having a thickness of about 0.12 mm was adhered and adhered, and then a flame-retardant transparent paint was applied on one side of the veneer to a thickness of about 0.03 mm.

As a result of the test, all of the decontamination time and the decontamination time were 0 seconds, so that the decontamination time within 5 seconds and the decontamination time within 30 seconds were satisfied, and the carbonization length within 20 cm, within 50 cm 2 And the smoke density that should be within 400 DS, all of Examples 16 to 18 were judged to be flammable.

However, the Comparative Examples 11 to 13 exceeded the criterion of the carbonization area that should be within 50 cm 2, and the Comparative Examples 12 and 13 exceeded the smoke density criterion which should be within 400 DS, It was judged that the flame-retardant performance was inappropriate.

Although the present invention has been described in connection with the specific embodiments of the present invention, it is to be understood that the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. Various modifications and variations are possible.

10: medium density fiberboard (MDF) or plywood
20: Flame retardant adhesive
30: Wood veneer
40:

Claims (14)

A first step of applying a flame resistant adhesive 20 to one surface of a medium density fiberboard (MDF) or plywood 10;
A second step of attaching the vignetting 30 to one side of the medium density fiberboard (MDF) or the plywood 10 to which the flame resistant adhesive 20 is applied;
Density medium fiberboard (MDF) or plywood (10) is placed between the heat plates of the press, and the heat and pressure are applied to the heat plates of the press, 10 and the vignetting 30 and drying the same;
A fourth step of sanding one side of the laminated wood 30 adhered to the medium density fiberboard (MDF) or plywood 10 using sandpaper; And
And a fifth step of applying a paint to one side of the trimmed veneer 30 to form a coated film 40. The flame retarding treatment method of a medium density fiberboard or plywood bonded with a veneer.
The method according to claim 1,
Wherein the flame retardant adhesive (20) comprises 70 to 85% by weight of an emulsion polyacrylic resin and 15 to 30% by weight of an ammonium polyphosphate.
3. The method of claim 2,
Wherein the emulsion polyacrylic resin is 75% by weight and the ammonium polyphosphate is 25% by weight.
The method according to claim 1,
Wherein the thickness of the laminated wood (30) is 0.10 to 0.14 mm.
5. The method of claim 4,
Wherein the flame-retardant adhesive (20) is applied in an amount of 120 to 180 g / m 2.
5. The method of claim 4,
Wherein the paint is a general clear paint, a UV transparent paint or a flame-retardant transparent paint.
The method according to claim 6,
Wherein the thickness of the coating film (40) of the general transparent paint is 0.02 to 0.04 mm.
The method according to claim 6,
Wherein the thickness of the coating film (40) of the UV transparent paint is 0.05 to 0.08 mm.
The method according to claim 6,
Wherein the thickness of the coating film (40) of the flame-retardant transparent paint is 0.02 to 0.04 mm.
The method according to claim 1,
Wherein the thickness of the laminated wood (30) is 0.15 to 0.60 mm.
11. The method of claim 10,
Wherein a flame retardant adhesive (20) is applied in an amount of 240 to 300 g / m < 2 >.
11. The method of claim 10,
Wherein the paint is a flame retardant UV transparent paint or a flame-retardant transparent paint.
13. The method of claim 12,
Wherein the thickness of the coating film (40) of the flame retardant UV transparent coating material is 0.04 to 0.06 mm.
13. The method of claim 12,
Wherein a thickness of the coating film (40) of the flame-retardant transparent paint is 0.05 to 0.08 mm.

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