KR101836072B1 - Manufacturing method of low pressure melamine designed panel - Google Patents

Abstract

The present invention relates to a method of manufacturing a low-pressure designing plate, and more specifically, it is possible to express various designs, pictures, photographs and the like in a variety of colors, thereby prolonging the storage period, (S1) for preparing a paper material for anti-object so as to improve the quality of the paper; A printing step (S2) of forming a print sheet by actually printing a predetermined pattern on an original using a printer; A primary resin impregnation step (S3) of impregnating the urea resin into the urea resin to impregnate the urea resin; A primary drying step (S4) of drying the printing paper impregnated with the urea resin so as to have a water content of 10 to 15%; A second resin impregnation step (S5) of impregnating the urea resin impregnated print paper with melamine resin to impregnate melamine resin; A second drying step (S6) for drying the volatile content of the print paper impregnated with the melamine resin so that the volatile content is 5 to 7%; A cutting step (S7) of cutting a print sheet to a predetermined size to produce a curled sheet; And an aging step of aging the veneer in a thermostatic chamber; To a method of manufacturing a low-pressure designing plate.

Description

TECHNICAL FIELD [0001] The present invention relates to a manufacturing method of a low-

The present invention relates to a method of manufacturing a low-pressure designing plate, and more particularly, to a method of manufacturing a low-pressure designing plate by which a variety of designs, pictures, and photographs can be expressed through a photorealistic printing technique.

Generally, a low-pressure screen is also referred to as LPM (Low Pressure Melamine), and refers to a paper which has high gloss and smoothness by impregnating paper with melamine resin and drying it.

Such a low-pressure screen can be used by attaching to a particle board (PB) or a medium density fiberboard (MDF) with appropriate heat, pressure and time, and is excellent in heat resistance, acid resistance, alkali resistance and abrasion resistance Because it is known, it is used in kitchen furniture, office furniture, tableware, children's furniture, electronic products, rice cans, doors, etc. in Korea and it is expected that the usage will increase considerably through future use and new product development.

In addition, the issue of environmental hormones, which is a major issue in recent households and major buildings, has been highlighted. The low pressure cooker is recognized as an eco-friendly product.

The MFC is called a Melamine Faced Chipboard (MFC) by adhering a low-pressure plate to both sides of a particle board or a heavy fiber board with appropriate heat, pressure and time. The MFC is subjected to a surface treatment using a low- It can have properties such as heat resistance, acid resistance, alkali resistance, abrasion resistance, etc.

The most commonly used patterns for MFC surface treatment are plain color and wood grain & pattern paper.

The monochromatic colors are literally white, gray, ivory, black, blue, yellow, red, etc .; they are achromatic series or chromatic series. Cherry, oak, teak, walnut, noche, zebra, pine etc. .

In the modern society, the needs of customers are becoming more fragmented, specific and pursuing products that show individuality, and new trends such as one-person generation and self-interior are created. It is changing into a variety of products.

However, it is possible to make a finished product according to characteristics and motifs of furniture, dining table, interiors, and buildings, but in spite of its excellent characteristics, it is possible to express it with the existing low pressure plate. There are limits to the variety of expressions of customers' needs and interior interiors that they want to make.

In consideration of these various needs, Korean Utility Model Registration No. 20-0456505 (Patent Document 1) discloses a method in which melamine impregnated non-woven paper is adhered to the surface of a wood plate and the melamine impregnated non- Pressure decorative board for a door of a household, which is capable of imparting a high-gloss high-gloss background texture and a wood texture to the surface of the wood plate by forming a pattern of embossing higher than that of the melamine-impregnated, non-rubbed-through ink through the ink.

However, the low-pressure screen of Patent Document 1 is merely a more prominent representation of the commonly used wood pattern as described above, and since the pattern is formed by the silkscreen printing technique, a variety of colors There is a problem in that it can not cope with various needs of customers.

1. Korean Registered Utility Model No. 20-0456505 (Announcement of 3rd November, 2011)

The present invention for solving the problems included in the above-mentioned prior art is to provide an image forming apparatus capable of realizing a variety of designs, pictures and photographs through coloring of various colors, while greatly improving the quality and durability of the product, The present invention provides a method of manufacturing a low-pressure conversion plate.

According to an aspect of the present invention, there is provided a method of fabricating a low-pressure designing plate, comprising: a paper preparation step of preparing a paper fabric; A printing step of forming a print sheet by actually printing a predetermined pattern on an original using a printer; A primary resin impregnation step of immersing the printing paper in urea resin to impregnate the urea resin and to adjust the amount of urea resin impregnation; A primary drying step of drying the printing paper impregnated with the urea resin by using an infrared lamp so as to have a moisture content of 10 to 15%; A second resin impregnation step of immersing the urea resin impregnated printing paper in a melamine resin to impregnate the melamine resin and adjusting the melamine resin impregnation amount according to the kind of the original paper; A second drying step of drying the melamine resin-impregnated printing paper so that the volatile content thereof is 5 to 7% by weight based on 100% by weight of the base paper; A cutting step of cutting the printing paper into a predetermined size to produce a curtain; And an aging step of aging the above veneer for more than 24 hours in a temperature and humidity chamber at a temperature of 20 to 25 DEG C and a humidity of 55 to 65% And a control unit.

According to the present invention, it is possible not only to express various designs, pictures, and photographs through real-life printing techniques, but also to express any design easily, so that it can cope with various needs of customers.

In addition, since it is manufactured and managed according to the optimal environment and conditions, there is almost no product defect rate, and quality and durability are greatly improved. Thus, by providing a high quality veneer plate, it is possible to improve the satisfaction and reliability of the consumer, I have.

1 is a block diagram showing a manufacturing process of a low-pressure designing plate according to the present invention.

While the present invention has been described in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood, however, that there is no intention to limit the invention to the form just described, and the spirit and scope of the present invention encompasses the ordinary variations, equivalents, and alternatives of the illustrated forms.

1 is a block diagram showing a manufacturing process of a low-pressure designing plate according to the present invention.

As shown in Fig. 1, the design low-pressure smoothing plate of the present invention is characterized in that the low-pressure designing sheet of the present invention comprises a raw paper preparing step S1, a real printing step S2, a primary resin impregnating step S3 of a urea resin, The second resin-impregnating step (S5), the second drying step (S6), the cutting step (S7), and the aging step (S8) for aging in a predetermined environment.

Each of the above steps will be described in detail below.

The paper preparation step S1 is a step of preparing a paper fabric. The paper fabric has a basis weight of 60 to 120 g / m 2, a density of 6.7 to 6.9 g / m 3, a water content of 2.5 to 4.0% the ash content is preferably 20 to 30% by weight, and the paper raw material may be roll-shaped rolls wound around a paper tube and may have a width of 1,270 mm and a resin absorption rate of up to 95%.

When the above conditions are not all satisfied, when the pattern (various patterns, pictures, photographs, actual photographs, etc.) is printed in the printing step S2 described later, the water base paint (ink) It is preferable to satisfy all of the above conditions.

The printing step S2 is a process of forming a predetermined pattern, that is, a variety of pictures, designs, photographs, characters, various patterns, etc., on a paper by using a laser printer, a digital printer, ) Is a process for producing a print paper.

The printing step (S2) further includes a step of rewinding the print paper to the paper tube using a rewinder device to recover the printed paper, and rewinding the print paper wound on the paper tube to another paper tube again .

When the printing paper is rewound, the printing paper is elongated to have tension. If the printing paper is run twice, the maximum tension is reached without changing the dimensions. In this case, in the case of resin impregnation and the like, It is possible to improve the workability and productivity as well as the quality of the product.

The primary resin impregnation step (S3) is a step of impregnating the print paper into the primary impregnation tank containing urea resin to impregnate the urea resin into the print paper.

At this time, in order to make the resin coat of the urea resin to be 40 to 42% by weight with respect to 100% by weight of the paper, 80 g of the print paper from the first impregnation tank was treated with a doctor having a reference thickness of 0.10 to 0.12 mm And passed through a doctor blade.

If the impregnation amount of the urea resin is less than 40 wt%, the melamine resin is not uniformly applied on the printing paper in the secondary resin impregnation step (S5) described later, so that the surface becomes rough to the naked eye, The resin coat of the urea resin is in the range of 40 to 42 wt% because of the heat trail after the press molding at the time of board manufacturing and the yellowing phenomenon during the lapse of time by the use of the low-pressure designing plate of the present invention. By weight is preferable.

In order to prevent bubbles from being generated in the printing paper when the urea resin is impregnated in the primary resin impregnation step (S3), one side (back side) of the printing paper is impregnated first to suppress and remove bubbles, .

In the primary drying step (S4), the printing paper impregnated with the urea resin is dried using an infrared lamp. At this time, the water content of the printing paper is at least 15%, and the preferable range is 10 to 15%.

If the moisture content is greater than 15%, the melamine resin impregnation described later can not be smoothly performed due to the large amount of water. If the moisture content is less than 10%, the drying time is long and the productivity is deteriorated.

The second resin impregnating step S5 is a step of immersing the urea resin impregnated printing paper in a second impregnation tank containing the melamine resin to impregnate the melamine resin. In order to control the melamine resin impregnation amount, a doctor blade blade or doctor roll may be used. The melamine resin impregnated amount may be adjusted within the range of 52 to 72% by weight based on 100% by weight of the paper, depending on the type of the paper.

For example, in the case where the paper is a decoration paper in the second resin impregnation step (S5), the amount of resin impregnation is set in the range of 54 to 62 wt%, and in the case of underlay paper, the resin impregnated amount is 52 to 54 By weight, and in the case of an overlay paper, the resin impregnation amount can be adjusted to 65 to 72% by weight.

If the impregnation amount of the melamine resin is less than 52% by weight, the surface roughness and yellowing of the surface of the board may become severe and the surface may be contaminated and the abrasion resistance may be lowered. On the contrary, if it is greater than 72% by weight, However, since the molding time may be prolonged, the cost may increase, which is not economical. Therefore, it is preferable to adjust the temperature within the range of 52 to 72% by weight.

In addition, a smoothening roll may be provided so that the melamine resin impregnated on the surface of the printing paper can be evenly spread before the secondary drying step (S6), which will be described later.

The secondary drying step (S6) is a step of drying (curing) the print paper impregnated with the melamine resin using hot air.

The drying zone (drying chamber) is about 6 m in length, and the air that has passed through the radiator by the fan is converted into hot air to be discharged to the drying zone, and the print is dried by hot air while passing through the drying zone.

The drying zone may define a plurality of separate drying zones, and the prints may sequentially pass through a plurality of drying zones that are separated from each other.

In this case, the set temperature of each drying zone is different. That is, in the secondary drying step S6, for example, four drying zones may be sequentially arranged, and the printing zone may be sequentially passed through the first to fourth zones.

The set temperature for each drying zone is set to be in the range of 97 to 103 ° C, 2 zone temperature 107 to 113 ° C, 3 zone temperature 117 to 123 ° C, and 4 zone temperature 132 to 138 ° C, And then dried.

At this time, the volatile content of the print paper is measured in each zone or every time in the drying step to adjust the conveying speed of the print paper so that the final volatile content becomes 5 to 7 wt% with respect to 100 wt% of the paper.

The volatile matter content refers to the amount of water and water contained in the water-soluble resin contained in the paper and the resin and the moisture content of paper evaporated during drying and transportation. When the volatile content is less than 5% by weight, If the amount is larger than 7% by weight, the activity of the resin is lowered, the adhesiveness is not good, the gloss, hardness and abrasion resistance of the board are low and heat marks are generated in the hot press process, Scratch-resistant surface pores are generated.

Accordingly, when the final volatile content is adjusted to the range of 5 to 7 wt%, the resin activity and the adhesion can be improved during press molding, and the gloss and hardness can be improved to produce a high quality product.

Meanwhile, the secondary drying step (S6) may further include cooling the print paper passing through the hot air drying zone through a cooling zone.

The cutting step S7 is a step of cutting the print paper passed through the secondary drying step S6 using a cutter to a predetermined size, for example, 4x8 inch or 4x6 inch, Process. At this time, because the cut dimensions of the design low pressure is different for each design, it is cut while adjusting the cutting position using a line machine designed to adjust the cutting position.

In the aging step (S8), the low pressure plate having been cut is packed and then kept in a constant temperature and humidity room to aged the resin impregnated layer. The temperature of the constant temperature and humidity chamber is maintained at 20 to 25 DEG C and the humidity is maintained at 55 to 65% It is preferable to keep it for at least 24 hours to mature.

When aged for 24 hours or more under such temperature and humidity, the preservation period of the low pressure lengthening plate is prolonged for 6 months or more, so that it is possible to exclude a separate chemical preservative and significantly increase the shelf life of the lengthening plate. At this time, it may be considered to aged for 72 hours or more, but it is economical to store for 72 hours or less because aging is performed sufficiently for 72 hours and the aging time is not prolonged even if aged more.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, 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 present invention as defined by the appended claims. It will not.

Claims (5)

A paper preparation step of preparing a paper fabric having a basis weight of 60 to 120 g / m 2, a density of 6.7 to 6.9 g / m 3, a water content of 2.5 to 4.0%, and a 20 to 30 wt%
A printing step of printing a predetermined pattern on an original using a printer or a plotter to form a print sheet;
To impregnate the urea resin into the urea resin and impregnate the urea resin with the urea resin in an amount of 40 to 42% by weight based on 100% by weight of the base paper, 80 g of the printing paper from the impregnation tank was coated with 0.10 to 0.12 mm of the reference thickness and 0.001 탆 A primary resin impregnation step of passing through a processed doctor blade;
A primary drying step of drying the print paper impregnated with the urea resin using an infrared lamp so as to have a moisture content of 10 to 15%;
The urea resin impregnated printing paper was immersed in a melamine resin, impregnated with melamine resin, and melamine resin impregnated amount was adjusted to 54 to 72% by weight with respect to 100% by weight of the paper, 80 g of a reference thickness of 0.10 to 0.12 mm and an end of 0.001 A doctor blade or a doctor roll which has been processed to have a diameter of 1 mm and passed through a doctor blade and then a secondary resin via a smoothing roll in order to uniformly spread the melamine resin impregnated on the surface of the printing paper Impregnation step;
The printing paper impregnated with the melamine resin is dried using hot air, and a plurality of drying areas are provided. The printing paper sequentially passes through each drying area. The set temperature of each drying area is gradually increased A second drying step in which the volatile matter content of the paper becomes 5 to 7% by weight based on 100% by weight of the base paper;
A cutting step of cutting a print sheet to a predetermined size to produce a curled sheet;
Aging step in which the above-described vinegar is kept in a temperature and humidity chamber at a temperature of 20 to 25 DEG C and a humidity of 55 to 65% for 24 to 72 hours to age; , ≪ / RTI &
Wherein the primary resin impregnation step comprises impregnating one side of the print paper with the impregnated printing paper so as to prevent air bubbles from forming on the printing paper, and then immersing the entire printing paper. The method according to claim 1,
Wherein the printing step comprises rewinding the actually printed paper to the paper tube using a rewinder device, and rewinding the printed paper again to another paper tube. delete The method according to claim 1,
Wherein the amount of resin impregnated in the secondary resin impregnation step is 54 to 62% by weight of a decorative paper, 52 to 54% by weight of an underlayage, and 65 to 72% by weight of an overlay, based on 100% Way. The method according to claim 1,
In the second drying step, the first to fourth drying zones are arranged in the order of passing through the printing paper, and the first zone temperature is 97 to 103 캜, the 2 zone temperature is 107 to 113 캜, the 3 zone temperature is 117 to 123 캜, 138 DEG C).

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