KR20050091458A - Method for decreasing formaldehide emission - Google Patents

Abstract

The present invention is a method for reducing formaldehyde dissipation from a formaldehyde dissipation product, characterized in that the addition of an anion emitter as a substance for inhibiting formaldehyde dissipation at any stage of the manufacturing process of the product, thereby form It can reduce the amount of aldehyde dissipation by more than 70%, which meets the formaldehyde emission standard, and in addition, composite board, furniture, building interior materials, wallpaper, etc., which releases negative ions that enhance user health, work efficiency and learning ability. It is possible to provide.

Description

Method for reducing formaldehide emission

The present invention relates to a method for suppressing formaldehyde emission, and more particularly, to a method for effectively reducing the amount of emission of formaldehyde, which is a large amount of environmental pollutants generated in composite boards, furniture, building interior materials, wallpaper, etc., where adhesives are frequently used. will be.

Formaldehyde is used in all industries because of its wide range of uses, and formaldehyde is generated in various products. Particularly, composite boards such as particle board (PB) and medium density fiberboard (MDF) are manufactured. It is frequently generated in adhesives (used in large quantities in the most commonly used urea resin), and also in large quantities in furniture, building interior materials, and wallpaper.

Formaldehyde emitted from indoors is released slowly over a fairly long period of time, and it is known that it is released at a high concentration in the period up to about 6 months, and then the emission is greatly reduced, but steadily until a considerable period. In particular, when the temperature is high and the humidity is high, the amount of dissipation tends to be greatly increased. Formaldehyde has many effects on the human body even at very low concentrations. Especially, it is an odor that causes eye irritation and strongly irritates the respiratory system. It has been shown to be carcinogenic through animal experiments.

Since 2004, laws in Korea have regulated the amount of formaldehyde below a certain standard. Formaldehyde must be removed and exhaustive formaldehyde should be discharged to the outside through thorough ventilation during new construction, reconstruction and moving in. However, emissions are limited in nature because of their long dissipation period.

Therefore, the main object of the present invention is to provide a method capable of effectively reducing or suppressing the amount of formaldehyde dissipation from formaldehyde dissipation products such as composite boards, furniture, building interior materials, wallpaper.

Another object of the present invention is to provide a product to which the above method is applied.

In order to achieve the above object, the present inventors have conducted various experiments for a long time, and when the anion releasing material is added at any stage in the process of manufacturing the formaldehyde dispersing product as described above, the amount of formaldehyde dissipation is negative The present invention has been completed by surprising the fact that it is greatly reduced compared to the case where no emitter is added.

Therefore, according to the present invention, a method for reducing formaldehyde emission from a formaldehyde dissipation product, wherein formaldehyde is added as an agent for inhibiting formaldehyde dissipation at any stage of the manufacturing process of the product. A method of suppressing release is provided.

Hereinafter, the present invention will be described in more detail.

The main gist of the present invention lies in the use of anion emitters as formaldehyde release inhibitors. According to the present invention, the addition of anion emitters to formaldehyde dissipating products, such as composite boards, furniture, building materials, wallpaper, etc., greatly reduces the amount of formaldehyde dissipation, because anions decompose formaldehyde or other harmless substances. It is assumed that this is because the action of converting to.

In the formaldehyde emission suppression method of the present invention, the formaldehyde emission suppressing material is added at any stage in the manufacturing process of formaldehyde defense products such as composite boards, furniture, building materials, wallpaper. Taking the manufacturing process of the furniture using the composite board as an example, the formaldehyde release inhibiting material is to press the wood powder / adhesive mixture when preparing the adhesive in the process of manufacturing the composite board as a raw material, when mixing the wood powder and the adhesive It may be added when the board is molded or after molding, or when preparing a furniture coating such as paint, varnish, etc. in the process of making furniture from the composite board, may be added at the time of coating, before or after the coating, or It may be added in two or more of the above steps.

In addition, in this method, the addition amount of the formaldehyde release inhibitor is not particularly limited, and may be any amount more than the minimum amount that can reduce formaldehyde dissipation, more preferably, the minimum amount that can be reduced below the formaldehyde emission reference amount.

In the present invention, all kinds of anion emitters may be used as the formaldehyde release inhibiting material, and in particular, rare earth metals such as strontium, vanadium, zirconium, cerium, neodymium, lanthanum, barium, rubidium, cesium, gallium and the like; Anion emitters containing one or two or more selected from the group consisting of ceramic and tourmaline, such as aluminum oxide, silicon oxide, titanium dioxide, magnesium oxide, calcium oxide, iron oxide, zirconium oxide and the like, are preferred.

Features and other advantages of the present invention as described above will become more apparent from the following examples. However, the following examples are presented to aid the understanding of the present invention, and the present invention is not limited thereto.

Example 1-1

A coating agent containing 20% by weight of rare earth mineral powder and 80% by weight of polyurethane-based water-soluble binder was applied in a roller manner to an amount of 200 g per 1 m 2 and compressed into a press to prepare a 3 mm-thick medium-density fiberboard (MDF). Formaldehyde emission of the prepared MDF was measured by the KS F 3111: 2001 method. In addition, the KICM-FIR-1042 method, that is, the charge particles were used to measure the amount of anion released at 73 ° C under anion water temperature of 21 ° C and 45% humidity. The measurement results are shown in Table 1. The measurements presented in Table 1 are average values of 12 specimens.

 [Examples 1-2 to 1-5]

The same procedure as in Example 1-1 was repeated except that the coating amount of the coating agent was changed as shown in Table 1.

Comparative Example 1

The same procedure as in Example 1-1 was repeated except that a coating agent consisting solely of a polyurethane-based water-soluble binder was used.

Coating Formaldehyde Dissipation (mg / L) Anion Release (ion / cc) Coating amount (g / ㎡) Rare Earth Minerals (wt%) Example 1-1 200 20 2.6 4473 Example 1-2 210 20 2.4 4512 Example 1-3 220 20 2.1 4589 Example 1-4 230 20 1.7 4621 Example 1-5 240 20 1.1 4695 Comparative Example 1 200 - 11.5 -

Example 2-1

A coating agent containing 20% by weight of rare earth mineral powder and 80% by weight of polyurethane-based water-soluble binder was applied in a roller manner to an amount of 200 g per 1 m 2 and compressed into a press to prepare a particle board (PB) having a thickness of 3 mm. Formaldehyde emission of the prepared PB was measured by the KS F 3111: 2001 method. In addition, the amount of anion release was measured by the KICM-FIR-1042 method. The measurement results are shown in Table 2. The measurements presented in Table 2 are average values of 12 specimens.

 [Examples 2-2 to 2-5]

The same procedure as in Example 2-1 was repeated except that the coating amount of the coating agent was changed as shown in Table 2.

Comparative Example 2

The same procedure as in Example 2-1 was repeated except that a coating agent consisting solely of a polyurethane-based water-soluble binder was used.

Coating Formaldehyde Dissipation (mg / L) Anion Release (ion / cc) Coating amount (g / ㎡) Rare Earth Minerals (wt%) Example 2-1 200 20 3.4 4511 Example 2-2 210 20 2.9 4578 Example 2-3 220 20 2.5 4612 Example 2-4 230 20 2.0 4653 Example 2-5 240 20 1.7 4721 Comparative Example 2 200 - 10.5 -

Example 3-1

The urea resin adhesive and the wood fiber were added in a concentration of 10% by weight to formaldehyde suppression composition containing 50% by weight of rare earth mineral powder, 20% by weight of tourmaline and 30% by weight of silicon oxide. A thick medium density fiberboard (MDF) was made. Formaldehyde emission of the prepared MDF was measured by the KS F 3111: 2001 method. The measurement results are shown in Table 3. The measurements presented in Table 3 are average values of 12 specimens.

[Examples 3-2 to 3-5]

The same procedure as in Example 3-1 was repeated except that an adhesive having a formaldehyde inhibitory composition concentration as shown in Table 3 was used.

Comparative Example 3

The same procedure as in Example 3 was repeated except that an adhesive without the addition of formaldehyde inhibitory composition was used.

division Concentration of Formaldehyde Inhibitory Composition in Adhesives (wt%) Formaldehyde Dissipation (mg / L) Example 3-1 10 2.8 Example 3-2 12 2.4 Example 3-3 14 1.5 Example 3-4 16 0.9 Example 3-5 18 0.3 Comparative Example 3 - 11.5

Example 4-1

Formaldehyde inhibitor composition containing 50% by weight of rare earth mineral powder, 20% by weight of tourmaline and 30% by weight of silicon oxide was mixed and molded with urea resin adhesive and wood flour added at a concentration of 10% by weight, and then subjected to heat and pressure to 3 mm thick. Particle Board (PB) was prepared. Formaldehyde emission of the prepared PB was measured by the KS F 3111: 2001 method. The measurement results are shown in Table 4. The measurements presented in Table 4 are average values of 12 specimens.

[Examples 2-2 to 2-5]

The same procedure as in Example 4-1 was repeated except that an adhesive having a formaldehyde inhibitory composition concentration as shown in Table 4 was used.

Comparative Example 2

The same procedure as in Example 4-1 was repeated except that an adhesive without the addition of formaldehyde inhibitory composition was used.

division Concentration of Formaldehyde Inhibitory Composition in Adhesives (wt%) Formaldehyde Dissipation (mg / L) Example 4-1 10 3.1 Example 4-2 12 3.0 Example 4-3 14 2.3 Example 4-4 16 1.5 Example 4-5 18 0.8 Comparative Example 4 - 10.5

As will be apparent from the above test results, according to the present invention, it is possible to greatly reduce the amount of formaldehyde dissipation by more than 70%, thereby meeting the formaldehyde emission standard, and in addition to improving the health, work efficiency and learning ability of the user. It is possible to provide a composite board, furniture, building interior materials, wallpaper, etc., having an emission effect.

Claims (5)

A method for reducing or inhibiting formaldehyde dissipation from a formaldehyde dissipating product, the method of inhibiting formaldehyde release, wherein an anionic emitter is added as a substance for inhibiting formaldehyde release at any stage of the manufacturing process of the product. . The method of claim 1, wherein the formaldehyde release inhibiting material is a rare earth metal such as strontium, vanadium, zirconium, cerium, neodymium, lanthanum, barium, rubidium, cesium and gallium; Formaldehyde characterized in that it is an anionic emitter containing one or two or more mixtures selected from the group consisting of ceramic and tourmaline, such as aluminum oxide, silicon oxide, titanium dioxide, magnesium oxide, calcium oxide, iron oxide and zirconium oxide. Emission suppression method. The method of claim 1, wherein the formaldehyde defense product is a composite board, furniture, building material or wallpaper. Formaldehyde release inhibiting product using the method of claim 1. 5. The formaldehyde emission inhibiting product of claim 4, wherein the product is a composite board, furniture, building interior or wallpaper.