KR102140408B1 - Eco-friendly LPM furniture with excellent antibacterial and adhesive properties, and method of manufacturing thereof - Google Patents

Abstract

The present invention comprises the steps of: a) impregnating the base paper with a primary impregnating composition comprising urea resin and a primary solvent, followed by drying to prepare urea impregnated paper; b) preparing an LPM impregnated paper by impregnating the urea impregnated paper with a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan and a secondary solvent, followed by drying; And c) manufacturing the LPM furniture by laminating the LPM impregnated paper on the surface of the furniture material and then thermoforming it, thereby manufacturing a green LPM furniture, and an eco-friendly LPM furniture manufactured therefrom.

Description

Eco-friendly LPM furniture with excellent antibacterial and adhesive properties, and method of manufacturing thereof

The present invention relates to an eco-friendly LPM furniture excellent in antibacterial and adhesive properties and a method for manufacturing the same.

In general, surface materials used for finishing furniture are mainly polyvinyl chloride (PVC), polypropylene (PP), and polyethylene terephthalate (PET).

Recently, as interest in manufacturing eco-friendly furniture has increased, low pressure melamine (LPM) impregnated paper is used to apply heat to a surface material used for furniture finishing without using an adhesive.

That is, the LPM surface material does not use a separate adhesive when attaching the shape paper, and attaches the resin contained in the shape paper as an adhesive when applying heat pressure. And it has the advantage of being excellent in flame retardancy compared to the sheet paper finishing method, and hardly generates scratches on the surface and is resistant to heat.

Korean Patent Registration No. 10-1220515 is proposed as a similar prior literature.

Republic of Korea Registered Patent Publication No. 10-1220515 (2013.01.03)

In order to solve the above problems, an object of the present invention is to provide an eco-friendly LPM furniture with improved antimicrobial properties, antimicrobial persistence and adhesion, and a method for manufacturing the same.

One aspect of the present invention for achieving the above object is a) impregnated with the primary impregnating composition containing the urea resin and the primary solvent, followed by drying to prepare the urea impregnated paper; b) preparing an LPM impregnated paper by impregnating the urea impregnated paper with a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan and a secondary solvent, followed by drying; And c) manufacturing the LPM furniture by laminating the LPM impregnated paper on the surface of the furniture material, followed by thermo-press molding to produce the LPM furniture.

In one embodiment, the chitosan may be made of chitosan oligomer and high molecular weight chitosan. At this time, the weight average molecular weight of the chitosan oligomer is 5,000 to 10,000 g/mol, and the weight average molecular weight of the high molecular weight chitosan may be 200,000 to 500,000 g/mol. In addition, the chitosan may be made of 5 to 30% by weight of chitosan oligomer and 70 to 95% by weight of high molecular weight chitosan among 100% by weight of chitosan.

In one embodiment, the secondary impregnating composition is 1 to 5 parts by weight of metal oxide particles, 0.1 to 3 parts by weight of zinc pyrithione, 20 to 100 parts by weight of chitosan, and 30 to 2 parts of secondary solvent relative to 100 parts by weight of melamine resin It may be to include 200 parts by weight.

In one embodiment, the metal oxide particles may be copper (I) oxide (Cu ₂ O), copper (II) oxide (CuO), or a mixture thereof.

In one aspect, the thermo-pressure molding may be performed at a temperature of 150 to 200°C and a pressure of 0.5 to 10 MPa.

In addition, another aspect of the present invention is an LPM furniture in which LPM impregnated paper is adhered to the surface of a furniture material, wherein the LPM impregnated paper is prepared by impregnating the primary impregnating composition comprising urea resin and a primary solvent and then drying it. Urea impregnated paper; is manufactured by impregnating a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan, and a secondary solvent, followed by drying, and relates to an eco-friendly LPM furniture.

The method of manufacturing eco-friendly LPM furniture according to the present invention is to impregnate the primary impregnating composition and dry it, and then impregnating and drying the secondary impregnating composition having antimicrobial properties to produce an LPM impregnated paper, and the LPM impregnated paper on the surface of the furniture material. As the LPM furniture is manufactured by thermoforming at low pressure, it can have excellent antimicrobial properties and antimicrobial persistence, and can be easily peeled off by providing excellent adhesion.

1 is a process flow diagram showing step by step the manufacturing process of the environment-friendly LPM furniture according to the present invention.

Hereinafter, an eco-friendly LPM furniture having excellent antibacterial and adhesive properties according to the present invention and a method of manufacturing the same will be described in detail. The drawings to be introduced in the following are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below, but may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. At this time, unless there are other definitions in the technical terms and scientific terms to be used, it has the meanings commonly understood by those of ordinary skill in the art to which this invention belongs, and the gist of the present invention in the following description and the accompanying drawings. Descriptions of well-known functions and configurations that may be obscured are omitted.

In the LPM furniture of the present invention, low pressure melamine (LPM) impregnated paper may be used as a surface material, and may mean furniture to which LPM impregnated paper is adhered to the surface of the furniture material.

An aspect of the present invention comprises the steps of: a) impregnating the base paper with a primary impregnating composition comprising a urea resin and a primary solvent, followed by drying to prepare urea impregnated paper; b) preparing an LPM impregnated paper by impregnating the urea impregnated paper with a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan and a secondary solvent, followed by drying; And c) manufacturing the LPM furniture by laminating the LPM impregnated paper on the surface of the furniture material, followed by thermo-press molding to produce the LPM furniture.

As described above, the method of manufacturing eco-friendly LPM furniture according to the present invention is impregnated with the primary impregnating composition and dried, followed by impregnating and drying the secondary impregnating composition having antimicrobial properties to produce LPM impregnated paper, and the LPM impregnated paper As the LPM furniture is manufactured by thermoforming with a low pressure on the surface, it can have excellent antimicrobial properties and antimicrobial persistence, and can be easily peeled off by providing excellent adhesion.

Hereinafter, each step of the eco-friendly LPM furniture manufacturing method according to the present invention will be described in more detail.

First, a) may be performed by impregnating the primary impregnating composition containing the urea resin and the primary solvent, followed by drying to prepare the urea impregnated paper.

In an example of the present invention, the base paper may be used without particular limitation as long as it is commonly used in the art, and for example, it may be any unprinted plain fabric, a desired color or pattern printed shape paper, and the like. The weight can be from 70 to 80 g/m2.

In one example of the present invention, the primary impregnation composition is for impregnating urea resin in the base paper, and the primary impregnation composition may include 30 to 200 parts by weight of the primary solvent with respect to 100 parts by weight of urea resin, , More preferably, it may include 50 to 100 parts by weight of the primary solvent with respect to 100 parts by weight of the urea resin. In this range, the urea resin can be impregnated well into the base paper, and the adhesive effect can be excellent afterwards.

The urea resin is a thermosetting resin produced by the reaction of urea and formaldehyde, and can be used without particular limitation, as long as it is commonly used in the art. As an example, the urea resin may be a polymer prepared by the reaction of urea and formaldehyde, or may be a partially polymerized prepolymer or a monomer composition to be partially polymerized, and specifically, the urea resin may form with respect to 1 mole of urea. It is possible to react 1 to 3 moles of aldehyde.

The primary solvent may be used without particular limitation as long as it can dissolve urea resin, and may be water as a specific example.

In an example of the present invention, step a) may be performed by impregnating the primary impregnation composition so that the base paper is completely immersed, and then drying the urea impregnated paper, wherein drying is performed using infrared rays, hot air or a dry oven. Can.

Next, when the urea impregnated paper is prepared, b) the urea impregnated paper is impregnated into a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan and a secondary solvent, followed by drying to prepare an LPM impregnated paper. Steps can be performed.

As described above, by impregnating and drying the urea impregnated paper in a secondary impregnating composition having antibacterial properties, an LPM impregnated paper is prepared, and as the LPM furniture is manufactured using the LPM impregnated paper, excellent antibacterial and antibacterial persistence can be achieved, and excellent adhesion It can be imparted to prevent easy peeling.

To this end, it is important to appropriately adjust the content of each component of the secondary impregnating composition, and as a specific example, the secondary impregnating composition is 1 to 5 parts by weight of metal oxide particles, zinc based on 100 parts by weight of melamine resin It may be one containing 0.1 to 3 parts by weight of pyrithione, 20 to 100 parts by weight of chitosan, and 30 to 200 parts by weight of a secondary solvent. More preferably, the metal oxide particles may be 1.5 to 3 parts by weight, 0.5 to 1.5 parts by weight of zinc pyrithione, 30 to 80 parts by weight of chitosan, and 50 to 100 parts by weight of the secondary solvent with respect to 100 parts by weight of the melamine resin. In this range, not only can the secondary impregnating composition effectively permeate the urea impregnated paper, but also the LPM impregnated paper can be well adhered to the surface of the furniture material by high temperature and low pressure molding without using a separate adhesive, and the antibacterial effect of the LPM furniture Can be excellent.

The melamine resin is a thermosetting resin prepared by the reaction of melamine and formaldehyde, and can be used without particular limitation as long as it is commonly used in the art. For example, the melamine resin may be a polymer prepared by the reaction of melamine and formaldehyde, or may be partially polymerized to form a prepolymer having a low polymerization degree or a monomer composition, and specifically, the melamine resin may be formed with respect to 1 mol of melamine. It is possible to react 4 to 6 moles of aldehyde.

The metal oxide particles may be used without particular limitation as long as they are metal oxide particles having antimicrobial properties. Preferably, the metal oxide particles may be copper oxide (I)(Cu ₂ O), copper(II) oxide (CuO), or a mixture thereof. In particular, it is most preferable to use copper oxide (I) having high antibacterial activity and antiviral activity. Copper (I) oxide is easier to elute copper ions than copper (II), so the eluted copper ions are microorganisms or viruses. It may be easy to inhibit the metabolic function of microorganisms and viruses by lowering activity by binding with enzymes or proteins by contacting with. In addition, it may be easy to deoxidize microorganisms and viruses by oxygenating oxygen in the air by catalytic action of the eluted copper ions.

The metal oxide particles may have an average particle size of 1 nm to 50 μm, and more preferably 0.1 to 10 μm. If the average particle size is less than 1 nm, the particles may aggregate, and if it exceeds 50 μm, the surface area per unit area may be small, so that the antimicrobial properties cannot be sufficiently exhibited, and the turbidity or stain of the LPM impregnated paper may be increased, resulting in desired color and design. Since it is difficult to implement it, it is preferable not to fall outside the above range.

Meanwhile, the metal oxide particles may be surface-pretreated. By forming a water-insoluble film on the surface of the metal oxide particles through surface pre-treatment, it is possible to prevent oxidation and discoloration, improve lubricity and dispersibility, and improve bonding properties with melamine resin.

Specifically, the metal oxide particles may be surface-pretreated with a surface treatment solution containing a phosphoric acid compound, a chromium compound, or a mixture thereof, and preferably surface-treated with a solution of a phosphoric acid compound having less harmful to the human body and the environment. For example, the phosphoric acid compound is not particularly limited as long as it can form phosphate ions on a solvent, but may be any one or two or more selected from the group consisting of phosphoric acid, polyphosphoric acid, phosphoric acid derivatives and phosphorous acid, and more specifically, As a non-limiting example, it may be any one or two or more selected from the group consisting of ammonium phosphate, potassium phosphate, sodium phosphate and calcium phosphate. Such a phosphate compound forms a film by forming a metal phosphate salt on the surface of the metal oxide particles.

The surface pretreatment solution may be used having a concentration of 3 to 20% by weight, wherein the solvent used may be distilled water, an organic solvent or a mixed solvent thereof, preferably an organic solvent.

The type of the organic solvent may be one that is commonly used, and specific examples thereof include aliphatic hydrocarbons such as hexane and heptane; Aromatic hydrocarbons such as toluene and xylene; Alcohols such as methanol, ethanol, isopropanol, butanol, and isobutanol; Ethers such as cellosol part and butyl cellosol part; Esters such as ethyl acetate, butyl acetate and amyl acetate; Ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; And amides such as N-dimethylformamide and dimethylacetamide; It may be any one or two or more selected from the group consisting of, and the like, preferably, aromatic hydrocarbons, alcohols or a mixed solvent thereof may be used, but this is only an example and the present invention is not limited thereto.

In addition, during the surface pretreatment, 5 to 30 parts by weight of metal oxide particles may be added to 100 parts by weight of the surface pretreatment solution, followed by stirring at a rate of 50 to 150 rpm for 5 to 60 minutes to obtain surface pretreated metal oxide particles, and thereafter distilled water It can be washed using, and dried at 60 to 90 ℃ for 12 to 24 hours.

The zinc pyrithione (Zn-pyrithione) is intended to further improve the antibacterial and antibacterial properties of the secondary impregnating composition, and zinc pyrithione can be used as a suspension dispersed in water, and is generally 48% by weight suspension It is commercialized and sold in a state, but zinc pyrithione (100%) may be used.

The chitosan is to improve the adhesion of the secondary impregnating composition and at the same time to further improve the antimicrobial properties, it may be preferably made of chitosan oligomer and high molecular weight chitosan. By mixing and using the chitosan oligomer and high molecular weight chitosan, adhesion and antibacterial properties can be further increased.

As a preferred example, the weight average molecular weight of the chitosan oligomer is 5,000 to 10,000 g/mol, and the weight average molecular weight of the high molecular weight chitosan may be 200,000 to 500,000 g/mol. If the weight average molecular weight of the chitosan oligomer is too small, the chitosan oligomer may not be impregnated well in the impregnated paper during the impregnation process, and if the weight average molecular weight is too large, the antimicrobial properties may be somewhat reduced. In addition, if the weight average molecular weight of the high molecular weight chitosan is too small, adhesiveness may be deteriorated, and if the weight average molecular weight of the high molecular weight chitosan is too large, it may be difficult to dissolve in the solvent.

In addition, as a preferred example, the chitosan may be made of 5 to 30% by weight of chitosan oligomer and 70 to 95% by weight of high molecular weight chitosan in 100% by weight of chitosan, more preferably 10 to 20% by weight of chitosan and high molecular weight Chitosan may be made of 80 to 90% by weight. In this range, it is possible to maximize antibacterial and adhesive properties.

The secondary solvent may be used without particular limitation as long as it can dissolve melamine resin and chitosan, and water may be used as a specific example.

In addition, the secondary impregnating composition may further include additional components within a range not impairing the object of the present invention.

In one example of the present invention, the secondary impregnating composition may further include polyethylene glycol having a weight average molecular weight of 200 to 800 g/mol to increase the solubility of zinc pyrithione, more preferably 300 to 600 g/ mol polyethylene glycol may be further included. By using polyethylene glycol having such a weight average molecular weight, zinc pyrithione can be effectively dissolved, thereby increasing the content of zinc pyrithione in the secondary impregnation composition, thereby securing better antibacterial and antibacterial properties. Can.

In one example of the present invention, the secondary impregnating composition may further include a diisocyanate-based monomer in order to further improve the adhesion of the LPM impregnated paper. More specifically, the diisocyanate-based monomer may be an aliphatic diisocyanate-based monomer, and more specifically, any one selected from the group consisting of butane diisocyanate, pentane diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, and lysine diisocyanate. It may be one or two or more. The diisocyanate-based monomer may react with melamine resin or urea resin to further improve the adhesion of the LPM-impregnated paper, while increasing the flexibility of the LPM-impregnated paper by an aliphatic group.

The amount of the diisocyanate-based monomer added is not particularly limited, but the secondary impregnating composition may include 5 to 20 parts by weight of the diisocyanate-based monomer based on 100 parts by weight of the melamine resin. In this range, when bonding the LPM impregnated paper to the surface of the furniture material, it is possible to secure more excellent adhesion and flexibility.

In addition to this, the secondary impregnation composition may further include an additive that is conventionally added in the art, and the additive is selected from the group consisting of a curing agent, a release agent, a dispersant, an anti-settling agent, an antioxidant, an antifoaming agent, a flame retardant, and an ultraviolet stabilizer. Can be more than one.

In an example of the present invention, step b) may be performed by impregnating the secondary impregnating composition so that the immersion impregnated paper is completely submerged, and then drying the LPM impregnated paper, where drying is performed using infrared rays, hot air, or a dry oven. Can be.

Next, when the LPM impregnated paper is manufactured, c) laminating the LPM impregnated paper on the surface of the furniture material, followed by thermo-press molding to produce an LPM furniture.

In more detail, the thermoforming may be performed at a temperature of 150 to 200°C and a pressure of 0.5 to 10 MPa. In such a temperature and pressure range, the LPM impregnated paper is well adhered to the surface of the furniture material and can be effectively integrated with the LPM impregnated paper and the furniture material, and may not be easily peeled off. In addition, as the LPM impregnated paper prepared by impregnating the secondary impregnating composition adheres to the surface of the furniture material, it may have excellent antibacterial and antibacterial persistence.

At this time, the furniture material may be wood, iron, plastic, or a combination of these. Preferably, the furniture material may be wood, and as a more specific example, the wood may be slab, lumber, aggregate wood, plywood, medium density fiberboard (MDF) or particle board (PB). .

In addition, the LPM furniture is not limited in particular if the use can be used in general, for example, may refer to all of the furniture finished with LPM impregnated paper, in more detail, some areas are finished with LPM impregnated paper Furniture and all areas may be furniture finished with LPM impregnated paper. More specifically, for example, desks, chairs, tables, bookcases, cabinets, chests of drawers, shoe racks, TVdais, beds, dressing tables, closets, futons, cupboards, dining tables, shelves, office desks, office chairs, office lockers, office file drawers It can be used as a partition, classroom desk, classroom stool, school table, cleaning tool box, or partitioning table. In addition, the LPM furniture may be used in a single place or may be a mobile type equipped with wheels.

In addition, another aspect of the present invention relates to eco-friendly LPM furniture manufactured from the above-described method of manufacturing eco-friendly LPM furniture, and in detail is LPM furniture in which LPM impregnated paper is adhered to a surface of a furniture material, wherein the LPM impregnated paper is an element of base paper. Urea impregnated paper prepared by impregnating a primary impregnating composition comprising a resin and a primary solvent and drying it; to a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan and secondary solvent It relates to LPM furniture, which is produced by impregnation and drying.

At this time, since the content of each component is the same as described above, duplicate description is omitted.

Hereinafter, an eco-friendly LPM furniture having excellent antibacterial and adhesive properties according to the present invention and an manufacturing method thereof will be described in more detail through examples. However, the following examples are only one reference for explaining the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

In addition, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used in the description herein are for the purpose of effectively describing specific embodiments and are not intended to limit the present invention. In addition, the unit of the additive not specifically described in the specification may be weight%.

[Example 1]

1) Preparation of urea impregnated paper: A primary impregnating composition was prepared by mixing 100 parts by weight of urea resin and 50 parts by weight of water. The primary impregnating composition was impregnated with white paper (75 g/m 2) and then dried with an infrared device to prepare urea impregnated paper.

2) Preparation of LPM impregnated paper: 100 parts by weight of melamine resin, 2.5 parts by weight of copper oxide particles, 1 part by weight of zinc pyrithione, 10 parts by weight of chitosan oligomer (weight average molecular weight (Mw) 8,000 g/mol), high molecular weight chitosan ( A second impregnation composition was prepared by mixing 40 parts by weight of weight average molecular weight (Mw) 350,000 g/mol and 100 parts by weight of water. The secondary impregnating composition was impregnated with the urea impregnated paper and dried with an infrared device to prepare an LPM impregnated paper.

At this time, the cuprous oxide (Cu ₂ O) particles were used by surface pretreatment as follows. 10 parts by weight of copper oxide (average particle size 20 nm) and 5 parts by weight of ammonium phosphate with respect to 100 parts by weight of dimethylformamide (DMF) were mixed and stirred for 30 minutes to pretreat copper oxide particles. Then, it was washed with distilled water and dried at 80° C. for 12 hours.

3) Thermoforming: LPM impregnated paper was laminated on the surface of a medium density fiberboard (MDF) and then thermopress-molded under conditions of 180° C. and 3 MPa to prepare an LPM furniture specimen.

[Example 2]

All processes were performed in the same manner as in Example 1 except that a chitosan oligomer having a weight average molecular weight of 2,000 g/mol was used differently.

[Example 3]

All processes were performed in the same manner as in Example 1 except that a chitosan oligomer having a weight average molecular weight of 5,000 g/mol was used differently.

[Example 4]

All processes were performed in the same manner as in Example 1 except that a chitosan oligomer having a weight average molecular weight of 10,000 g/mol was used differently.

[Example 5]

All processes were performed in the same manner as in Example 1 except that a chitosan oligomer having a weight average molecular weight of 15,000 g/mol was used differently.

[Example 6]

All processes were performed in the same manner as in Example 1 except that a high molecular weight chitosan having a weight average molecular weight of 100,000 g/mol was used differently.

[Example 7]

All processes were performed in the same manner as in Example 1 except that a high molecular weight chitosan having a weight average molecular weight of 200,000 g/mol was used differently.

[Example 8]

All processes were performed in the same manner as in Example 1 except that a high molecular weight chitosan having a weight average molecular weight of 500,000 g/mol was used differently.

[Example 9]

All processes were performed in the same manner as in Example 1 except that a high molecular weight chitosan having a weight average molecular weight of 1,000,000 g/mol was used differently.

[Example 10]

All the processes were carried out in the same manner as in Example 1 except that 2 parts by weight of chitosan oligomer and 8 parts by weight of high molecular weight chitosan were used differently.

[Example 11]

All the processes were carried out in the same manner as in Example 1 except that 6 parts by weight of chitosan oligomer and 24 parts by weight of high molecular weight chitosan were used differently.

[Example 12]

All processes were carried out in the same manner as in Example 1 except that the chitosan oligomer was used in 16 parts by weight and high molecular weight chitosan in 64 parts by weight.

[Example 13]

All the processes were carried out in the same manner as in Example 1 except that 30 parts by weight of chitosan oligomer and 120 parts by weight of high molecular weight chitosan were used differently.

[Example 14]

All the processes were carried out in the same manner as in Example 1 except that the chitosan oligomer was used in 1 part by weight and high molecular weight chitosan in 49 parts by weight.

[Example 15]

All the processes were carried out in the same manner as in Example 1 except that 15 parts by weight of chitosan oligomer and 35 parts by weight of high molecular weight chitosan were used differently.

[Example 16]

All the processes were carried out in the same manner as in Example 1 except that the chitosan oligomer was used in 25 parts by weight and high molecular weight chitosan in 25 parts by weight.

[Comparative Example 1]

A primary impregnation composition was prepared by mixing 100 parts by weight of urea resin and 50 parts by weight of water. The primary impregnating composition was impregnated with white base paper and then dried with an infrared device to prepare urea impregnated paper.

Next, a second impregnation composition was prepared by mixing 100 parts by weight of melamine resin and 50 parts by weight of water. The secondary impregnating composition was impregnated with urea impregnated paper and dried with an infrared device to prepare LPM impregnated paper. Thereafter, the LPM impregnated paper was laminated on the surface of a medium density fiberboard (MDF), and then thermopress-molded under conditions of 180° C. and 3 MPa to prepare an LPM furniture specimen.

[Comparative Example 2]

All processes were performed in the same manner as in Comparative Example 1 except that a secondary impregnating composition was prepared by mixing 2.5 parts by weight of copper oxide particles and 50 parts by weight of water with respect to 100 parts by weight of melamine resin.

[Comparative Example 3]

All processes were performed in the same manner as in Comparative Example 1 except that a second impregnation composition was prepared by mixing 1 part by weight of zinc pyrithione and 50 parts by weight of water with respect to 100 parts by weight of melamine resin.

[Comparative Example 4]

All processes were performed in the same manner as in Comparative Example 1 except that a second impregnation composition was prepared by mixing 50 parts by weight of chitosan oligomer (weight average molecular weight of 8,000 g/mol) and 100 parts by weight of water with respect to 100 parts by weight of melamine resin.

[Comparative Example 5]

All processes were performed in the same manner as in Comparative Example 1 except that a second impregnation composition was prepared by mixing 50 parts by weight of high molecular weight chitosan (weight average molecular weight 350,000 g/mol) and 100 parts by weight of water with respect to 100 parts by weight of melamine resin.

[Characteristic evaluation]

1) Antibacterial evaluation:

Antibacterial activity was tested by the KCL-FIR-1003:2018 method. Specifically, E. coli ( Escherichia coli ATCC 8739) 3.7×10 ⁵ CFU/mL and Staphylococos aureus ATCC 6538P 3.4×10 ⁵ CFU/mL were inoculated at initial concentrations (A ₀ , CFU/mL), respectively. The concentration (A ₁ , CFU/mL) after standing at 37.0±0.2° C. for 24 hours was confirmed, and the bacterial reduction rate (%) was calculated therefrom, and the results are shown in Table 1 below. As a control group, an untreated group (A ₁ , CFU/mL) was prepared. In addition, the bacterial reduction rate was calculated as (A ₀ -A ₁ )/A ₀ ×100.

2) Adhesion evaluation:

On the LPM surface material of the LPM furniture specimens prepared from Examples 1 to 16 and Comparative Examples 1 to 4, 10 lines were respectively drawn at 0.5 cm intervals with a cutter to draw 100 square cutting lines. The cutting line is deep enough to reach the MDF wood specimen. Thereafter, a cellophane tape (NICHIBAN, width 24 mm) is attached to a square cutting line, completely adhered, and then immediately removed. Subsequently, the number of square grids separated from the LPM surface material layer was visually counted to evaluate adhesion, but if less than 90, bad (X), if more than 90 and less than 95, normal (△), and more than 95 and less than 98 It was evaluated as good (○) when adhered and excellent (◎) when more than 98 were adhered, and the results are shown in Table 1 below.

3) Appearance evaluation:

The appearance of the LPM furniture specimens prepared from Examples 1 to 16 and Comparative Examples 1 to 4, respectively, was visually evaluated. The evaluation was evaluated as x when the orange peel phenomenon was noticeable, △ when the orange peel phenomenon was weak, and ◎ when the appearance was excellent, and the results are shown in Table 1 below.

Chitosan oligomer High molecular weight chitosan Bacterial reduction rate (%) Adhesiveness Exterior Mw Parts by weight Mw Parts by weight E.coli S. aureus Initial concentration - 3.7×10 ⁵ 3.4×10 ⁵ - - Control - 9.5×10 ⁶ 2.3×10 ⁶ - - Example 1 8,000 10 350,000 40 99.9 99.9 ◎ ◎ Example 2 2,000 93.9 94.8 ◎ ◎ Example 3 5,000 99.9 99.9 ◎ ◎ Example 4 10,000 99.9 99.9 ◎ ◎ Example 5 15,000 95.1 96.0 ◎ ◎ Example 6 8,000 10 100,000 40 99.9 99.9 △ ◎ Example 7 200,000 99.9 99.9 ◎ ◎ Example 8 500,000 99.9 99.9 ◎ ◎ Example 9 1,000,000 99.9 99.9 ○ x Example 10 8,000 2 350,000 8 97.2 96.7 △ ◎ Example 11 6 24 99.9 99.9 ◎ ◎ Example 12 16 64 99.9 99.9 ◎ ◎ Example 13 30 120 99.9 99.9 ○ △ Example 14 8,000 One 350,000 49 93.2 92.8 ◎ ◎ Example 15 15 35 99.9 99.9 ◎ ◎ Example 16 25 25 99.9 99.9 △ ◎ Comparative Example 1 x x x x - - △ ◎ Comparative Example 2 x x x x 84.0 95.0 △ ◎ Comparative Example 3 x x x x 74.1 77.1 △ ◎ Comparative Example 4 8,000 50 x x 72.1 79.9 △ ◎ Comparative Example 5 x x 350,000 50 72.6 71.9 ◎ ◎

As shown in Table 1, when the LPM impregnated paper prepared by using the secondary impregnating composition according to the present invention is prepared and adhered to the surface of a furniture material to produce LPM furniture, it exhibits excellent antibacterial, adhesive and appearance properties Could confirm.

In more detail, in comparison to Examples 1 to 9, in which the weight average molecular weight of chitosan oligomer and high molecular weight chitosan were varied,

In the case of Examples 1, 3, 4, 7 and 8 using chitosan oligomers having an appropriate weight average molecular weight and high molecular weight chitosan, the antibacterial property was very excellent, and the adhesion and appearance characteristics were excellent.

On the other hand, in the case of Example 2, in which the weight average molecular weight of the chitosan oligomer was too small, chitosan oligomer was lost a lot when impregnated, and thus the antimicrobial properties were slightly lowered. Conversely, in the case of Example 5, in which the weight average molecular weight of the chitosan oligomer was too large, the antimicrobial activity was slightly lowered, and this also showed the antibacterial properties.

In the case of Example 6, in which the weight average molecular weight of the high molecular weight chitosan was too small, the adhesiveness was decreased, and in Example 9, where the weight average molecular weight of the high molecular weight chitosan was too large, the water did not readily dissolve in the high molecular weight chitosan, resulting in an orange peel phenomenon. This appeared severely, and the adhesion was also lowered.

In addition, the ratio of chitosan oligomer and high molecular weight chitosan is the same, but in contrast to Examples 1 and 10 to 13 tested by varying the content of chitosan,

In the case of Examples 1, 11 and 12 in which chitosan was added at an appropriate content, not only the antibacterial property was very excellent, but also the adhesion and the appearance properties were excellent.

On the other hand, in the case of Example 10 in which a small amount of chitosan was added, both the antimicrobial properties and the adhesiveness were deteriorated. In the case of Example 13 in which too much chitosan was added, the antibacterial property was excellent, but there was a disadvantage in that an orange peel occurred.

In addition, the content of chitosan is the same, as compared with Examples 1 and 14 to 16, which were experimented by varying the ratio of chitosan oligomer and high molecular weight chitosan,

In the case of Examples 1 and 15 in which chitosan oligomer and high molecular weight chitosan were mixed in an appropriate ratio, not only the antibacterial property was very excellent, but also the adhesion and appearance characteristics were excellent.

On the other hand, in spite of using the same amount of chitosan as in Example 1, in the case of Example 14 in which the proportion of chitosan oligomer was too low, the antimicrobial property was lowered, and in Example 16 in which the proportion of high molecular weight oligomer was too low, adhesiveness It was lowered.

On the other hand, Comparative Example 1 in which all of copper oxide, zinc pyrithione and chitosan were not added, Comparative Example 2 in which only copper suboxide was added, Comparative Example 3 in which only zinc pyrithione was added, and only chitosan oligomer was added In Comparative Example 4 and Comparative Example 4 in which only high molecular weight chitosan was added, the antimicrobial properties were slightly inferior.

Although the present invention has been described through specific matters and limited embodiments as described above, it is provided only to help a more comprehensive understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention pertains Those skilled in the art can make various modifications and variations from these descriptions.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and should not be determined, and all claims that are equivalent or equivalent to the scope of the claims as well as the claims described below belong to the scope of the spirit of the invention. .

Claims (8)

a) impregnating the primary paper with a primary impregnating composition comprising urea resin and a primary solvent, followed by drying to prepare urea impregnated paper;
b) preparing an LPM impregnated paper by impregnating the urea impregnated paper with a secondary impregnating composition comprising melamine resin, metal oxide particles, zinc pyrithione, chitosan and a secondary solvent, followed by drying; And
c) manufacturing the LPM furniture by laminating the LPM impregnated paper on the surface of the furniture material and then thermoforming it;
It includes,
The secondary impregnating composition comprises 1.5 to 3 parts by weight of metal oxide particles, 0.5 to 1.5 parts by weight of zinc pyrithione, 30 to 80 parts by weight of chitosan, and 50 to 200 parts by weight of secondary solvent, based on 100 parts by weight of melamine resin,
The chitosan is composed of 10 to 20% by weight of chitosan oligomer and 80 to 90% by weight of high molecular weight chitosan in 100% by weight of chitosan,
The chitosan oligomer has a weight average molecular weight of 5,000 to 10,000 g/mol,
The high molecular weight chitosan has a weight average molecular weight of 200,000 to 500,000 g/mol, a method of manufacturing eco-friendly LPM furniture. delete delete delete delete According to claim 1,
The metal oxide particles are copper oxide (I) (Cu ₂ O), copper (II) oxide (CuO) or a mixture thereof, a method for manufacturing eco-friendly LPM furniture. According to claim 1,
The thermoforming is carried out at a temperature of 150 to 200 ℃ and a pressure of 0.5 to 10 ㎫, a method of manufacturing eco-friendly LPM furniture. LPM furniture with LPM impregnated paper adhered to the surface of furniture materials,
The LPM impregnated paper, urea impregnated paper prepared by impregnating the base paper with a primary impregnating composition comprising a urea resin and a primary solvent; and drying the melamine resin, metal oxide particles, zinc pyrithione, chitosan and secondary solvent It is prepared by impregnating the secondary impregnating composition containing and drying it,
The secondary impregnating composition comprises 1.5 to 3 parts by weight of metal oxide particles, 0.5 to 1.5 parts by weight of zinc pyrithione, 30 to 80 parts by weight of chitosan, and 50 to 200 parts by weight of secondary solvent, based on 100 parts by weight of melamine resin,
The chitosan is composed of 10 to 20% by weight of chitosan oligomer and 80 to 90% by weight of high molecular weight chitosan in 100% by weight of chitosan,
The chitosan oligomer has a weight average molecular weight of 5,000 to 10,000 g/mol,
The high molecular weight chitosan has a weight average molecular weight of 200,000 to 500,000 g/mol, an eco-friendly LPM furniture.

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