KR19990079972A - Manufacturing method of the decorative board - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method of manufacturing a patterned paper produced to exhibit a decorative effect by laminating a decorative paper with a variety of patterns on the outer surface of furniture, such as thermocompression bonding.

2. Technical problem to be achieved

The present invention can not only minimize the overall thickness of the kraft paper by improving the polishing process of the kraft paper bonded to the decorative paper during the manufacture of the pattern paper, but also improve the physical properties of the adhesive resin used during the impregnation treatment of the kraft paper finally produced It is an object of the present invention to provide a manufacturing method of a shape paper which can greatly improve the overall productivity by enabling low temperature work if the paper is to be laminated to the surface of the furniture panel such as wood.

3. Summary of Solution to Invention

The present invention for achieving the above object is "impregnated decorative paper prepared by drying the decorative paper impregnated in the thermoplastic melamine resin solution containing 56 to 60% by weight in a drying furnace maintained at a temperature of 130 to 150 ℃ And impregnated by drying the kraft paper impregnated in the phenolic resin solution containing 38 to 43% by weight of phenolic resin and 3 to 5% by weight of plasticizer in a drying furnace maintained at a temperature of 130 to 150 ° C. After laminating the kraft paper, heat-processed for 40 to 50 minutes at a temperature of 60 to 70 kg / cm ² at a temperature of 140 to 160 ℃, and then kraft surface of the paper of "air polishing or mechanical spray It provides a manufacturing method.

4. Important uses of the invention

The present invention has a use as a sheet of paper for laminating to a plate such as furniture.

Description

THE METHOD OF PRODUCING LAMINATING SHEET

The present invention relates to a method of manufacturing a pattern paper, and more particularly, to a method of manufacturing a pattern paper produced to exhibit a decorative effect by laminating a decorative paper with a variety of patterns on the outer surface such as furniture, such as thermocompression bonding. It is about.

In general, the shape paper that has been used up to now was prepared by impregnating a decorative paper with a variety of patterns on the melamine resin and dried, and then kraft paper impregnated with a commonly used thermosetting resin laminated on one side of the decorative paper was thermally compressed to prepare a In order to bond the manufactured paper to the surface of the plate used in the manufacture of furniture, etc., to increase the adhesive force between the manufactured paper and the surface of the plate, sandpaper, etc. The constructed kraft surface was polished and then bonded by thermocompression bonding in close contact with the plate surface.

As such, when the sandpaper is polished, the wear of the kraft paper formed on the paper is severe, so the number of lamination of the kraft paper must be increased to ensure a constant thickness. Since the overall thickness of the paper is very thick, 0.7 to 0.8 mm, there was a problem in that a processing facility of a certain size or more should be provided when bonding to a plate.

In addition, in the case of the heat-adhesive resin used for impregnating kraft paper formed in the above-mentioned paper, conventional thermosetting resins are used in the past. There was a problem that acts as a factor to increase the production cost of the product.

The present invention is to solve the problems of the prior art as described above, to improve the physical properties of the adhesive resin used in the impregnation treatment of kraft paper bonded to the decorative paper in the manufacture of paper, and furthermore, the process of polishing the kraft paper Not only can the overall thickness of kraft paper be minimized, but it is also possible to use the low temperature work when laminating the final manufactured paper to the surface of furniture panels such as wood. The purpose is to provide a manufacturing method.

The present invention for achieving the above object is an impregnated decorative paper prepared by drying the decorative paper impregnated in the thermoplastic melamine resin liquid containing a resin content of 56 to 60% by weight in a drying furnace maintained at a temperature of 130 to 150 ℃ Impregnated by drying the kraft paper impregnated in a phenolic resin solution containing 38 to 45% by weight of thermoplastic phenolic resin and 3 to 5% by weight of plasticizer in a drying furnace maintained at a temperature of 130 to 150 ℃ After laminating the kraft paper, heat-processed 40 to 50 minutes at a pressure of 60 to 70kg / cm ² at a temperature of 140 to 160 ℃, and then kraft surface air grinding or mechanical spraying characterized in that It provides a method of manufacturing a paper.

In the present invention, the decorative paper impregnated with the melamine resin may be used by designing various patterns on the surface of the paper or the synthetic resin film, and it is preferable to use 60 to 80 g / m ² .

The thermoplastic melamine resin is a kind of amino resin prepared from melamine and formaldehyde. The thermoplastic melamine resin is a substance showing excellent adhesion to various materials such as paper or synthetic resin material. The thermoplastic melamine resin is diluted with an organic solvent and used to adjust to an appropriate viscosity. If the content is lowered to less than 56% by weight, there is a problem in the adhesive strength in the subsequent thermocompression process, there is no need to mix more than 60% by weight.

The kraft paper used in the present invention can be prepared by treating pine with a mixture of caustic soda, sodium sulfate, sodium carbonate, etc., and it is a paper material expressing high strength as compared to paper generally used. Although present, the present invention uses 160 to 170 g / m ² of kraft paper.

The phenol resin solution for impregnating the kraft paper includes a phenol resin, an ammonium crystal and a plasticizer. Of these, the phenol resin is also an organic solvent as a material exhibiting excellent adhesion to various materials such as paper or synthetic resin materials, like the melamine resin. Dilute to and adjust to an appropriate viscosity, and if the resin content is lowered to less than 38% by weight, there will be a problem in the adhesive strength with the melamine resin impregnated in the decorative paper in the subsequent thermocompression process, and exceed 43% by weight. In this case, a problem arises in that the rate at which the phenol-formaldehyde resin is impregnated into kraft paper is delayed.

Such a phenol resin is a generic term for thermosetting resins prepared by polymerizing phenol and an aldehyde compound, and more preferably, a phenol-formaldehyde resin having excellent properties in terms of physical properties such as heat resistance or moisture resistance is used.

However, as described above, when preparing a resin liquid for impregnating the kraft paper using only phenolic resin, high temperature of 130 ° C. or higher is required when thermocompression-processing the finally produced shape paper on a plate such as furniture. In the present invention, in the preparation of the resin solution for impregnation of the kraft paper, by mixing an appropriate amount of plasticizer and ammonium crystals to plasticize the phenolic resin it can be effectively carried out thermocompression processing at a low temperature of 60 to 90 ℃.

The plasticizer used in the present invention may be a plasticizer for phenol resins commonly used, such as triisopropylated phenyl phosphate and triaryl phosphate, and when the amount is less than 3%, Does not proceed sufficiently and does not need to be added more than 5% by weight.

The decorative paper and kraft paper should be sufficiently dried after the impregnation treatment in the resin liquid, but if the drying temperature is less than 130 ℃, there is a problem that the drying speed is delayed, if the decorative paper and the impregnation liquid made of synthetic resin is exceeded Since it can be heat burn type it is good to maintain the temperature range of 130 ℃ to 150 ℃.

As described above, after the impregnated decorative paper and kraft paper are laminated, they are placed in a mold maintained at a temperature of 140 to 160 ° C. and maintained for 45 to 50 minutes while being pressed at a pressure of 60 to 70 kg / cm ² . The kraft paper can be firmly adhered, and if the pressing surface temperature of the mold used for heating and pressing is less than 140 ° C., a desirable adhesive effect cannot be obtained. If the temperature is raised above 160 ° C., the heat deformation of the paper is caused by overheating. This may result.

In addition, in order to enhance the adhesive effect during the thermocompression bonding, a pressure of 60 to 70 kg / cm ² is applied. The pressing pressure is greater than 70 kg / cm ² to the paper while the temperature of the pressing surface in the mold is heated to 140 ° C. or higher. In this case, it is preferable to pressurize within the above range because there is a problem that the deformation of the pattern paper can be partially or entirely.

Finally, by kneading the kraft surface composed of the shape paper produced by the thermo-compression treatment in the above-described manner, the shape paper can be more effectively adhered to the surface of the plate during the adhesion treatment to the plate, such as furniture, conventionally polished stone or sandpaper Since the polishing was difficult, it was difficult to uniformly grind and the polishing paper was frequently damaged due to excessive polishing than necessary. Therefore, the kraft paper composed of the paper was laminated many times, thereby increasing the thickness. The abrasive sand is sprayed and polished by a method such as the above. In this case, crystal particles such as abrasive sand having an appropriate hardness are sprayed using high pressure air, or a machine spray device such as an impeller is sprayed at a constant pressure and speed to kraft. Proper angle to the adhesive side of the paper By grinding by impact to that minimizes the overall appearance fingers thickness by uniform polishing can be only did not prevent excessive grinding's stacked in single-layer kraft paper to be laminated on whether shape.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples.

<Example>

After the resin content having a size of 60g / m ² to Article 60% by weight of the thermoplastic melamine resin solution is loaded immersed width size each impregnated paper 1200mm and 1330mm decorated, the temperature in the furnace and then remove it from the immersion tank 140 ± It was maintained at 5 ° C. and dried by passing a drying furnace of about 60 m in length at a rate of 10 m / min.

Separately, an impregnated tank loaded with a thermoplastic phenol resin solution containing 40% by weight of thermoplastic phenol-formaldehyde resin and 4% by weight of plasticizer was impregnated with kraft paper having dimensions of 70 g / m ² and width sizes of 1200 mm and 1330 mm, respectively. Then, it was taken out of the immersion tank and then the temperature in the furnace was maintained at 140 ± 5 ℃ and dried by passing a drying furnace of length 60m at a speed of 13m / min.

After laminating the impregnated decorative paper and kraft paper, the press plate was placed in a mold having a temperature of 150 ± 10 ° C. by using a heating press, and maintained at a pressure of 65 kg / cm ² for about 45 minutes, and then the pressure was maintained as it is. In one state, the temperature was cooled to 50 ° C. and demolded to prepare a pattern paper of the present invention having a thickness of 0.3 mm.

Abrasive sand was sprayed on the kraft surface of the shape paper thus prepared with a spray nozzle to uniformly grind.

Comparative Example 1

In the same manner as in the above example, a plasticizer and an aluminum crystal were not added in the preparation of the phenolic resin solution used to immerse the kraft paper.

Comparative Example 2

It carried out in the same manner as in the above embodiment, but was polished by hand using sandpaper when polishing the pattern paper.

Laminating each shape paper prepared in Examples and Comparative Examples 1 to 2 on a wood plate having a width size of 1200mm and 1330mm, respectively, the temperature of 90 ℃ and 65kg / cm while the kraft surface of the paper is in close contact with the wood plate ^As a result of laminating at a pressure of ² , in the case of the shape paper prepared from Comparative Example 1, a part was not partially adhered, and in the case of Comparative Example 2, the surface of the kraft surface was so poor that the surface was uneven and the shape was not uniform. Damage to the paper surface was found, but in the case of the shape paper produced from the Example was very firmly adhered to the wood plate and the surface was also found to be very uniform.

The present invention not only minimizes the overall thickness of the kraft paper by improving the polishing process of kraft paper used in the manufacture of paper, but also improves the physical properties of the adhesive resin used during the impregnation of kraft paper, which is used for furniture. When laminating by heat bonding to the surface of the plate is a useful invention to provide a manufacturing method of the shape paper that can greatly improve the overall productivity by enabling low-temperature work.

Claims (1)

Impregnated decorative paper prepared by drying the decorative paper impregnated in the thermoplastic melamine resin solution containing 56 to 60% by weight in a drying furnace maintained at a temperature of 130 to 150 ° C, 38 to 43% by weight of phenol resin and a plasticizer After laminating the impregnated kraft paper prepared by drying the kraft paper impregnated in the phenol resin solution containing 3 to 5% by weight in a drying furnace maintained at a temperature of 130 to 150 ℃, 140 to 160 Process for hot-pressing for 40 to 50 minutes at a temperature of 60 to 70kg / cm ² at a temperature of ℃, and then kraft surface air grinding or mechanical spray polishing method characterized in that the paper.