Anti-fingerprint melamine impregnated paper and preparation method thereof

Abstract

The invention discloses anti-fingerprint melamine impregnated paper and a preparation method thereof.The preparation method comprises the following steps that S1, formaldehyde, melamine, diethylene glycol and a hydrophobic and oleophobic additive are mixed and stirred, a fluorocarbon modifier is added after the temperature is increased, a heat preservation reaction is conducted, and modified melamine resin is obtained; and S2, carrying out twice impregnation curing on raw paper by using the modified melamine resin obtained in the step S1 to obtain the anti-fingerprint melamine impregnated paper. According to the invention, the self-cleaning function can be realized. The embossment template is controlled through a pressing and pasting process, a micron-nano composite structure (similar to a lotus leaf mastoid) is formed, and the hydrophobicity is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of impregnated paper, and in particular relates to anti-fingerprint melamine impregnated paper and a preparation method thereof. Background Art

[0002] The pursuit of easy-to-clean experience has become a key trend in modern home design. Consumers are increasingly choosing furniture with smooth surfaces that resist dust and fingerprints, such as dining tables and coffee tables with high-gloss panels. These surfaces are not only aesthetically pleasing but also greatly simplify daily cleaning, satisfying consumers' demand for convenient living and driving the development of fingerprint-resistant furniture.

[0003] When choosing furniture, consumers often expect it to be not only aesthetically pleasing but also durable and long-lasting. The rise of anti-fingerprint furniture, for example, satisfies this demand for both aesthetically pleasing and durable furniture, highlighting consumers' pursuit of a quality lifestyle.

[0004] As consumers pursue both aesthetics and practicality in their homes, the market demand for furniture that is easy to clean and maintains its appearance has surged. However, anti-fingerprint technology is currently rarely used in the furniture field. This blank area indicates huge market development space.

[0005] The use of veneer technology in furniture, cabinets, and wall panels not only demonstrates its sturdiness and durability, but also, through innovative surface treatment technology and anti-fingerprint design, complements other metal surface processes, giving furniture an elegant appearance and practical protection, leading a new trend in home aesthetics.

[0006] Although the film-coated anti-fingerprint products on the market have hydrophobic properties, they have obvious defects in cost, scratch resistance and corrosion resistance. In particular, the cost of adding a film coating process and raw materials is too high. Summary of the Invention

[0007] In view of this, the present invention aims to provide anti-fingerprint melamine impregnated paper and a preparation method thereof to solve at least one technical problem in the background technology.

[0008] To achieve the above object, the technical solution of the present invention is achieved as follows: Compared with the prior art, the anti-fingerprint melamine impregnated paper and its preparation method of the present invention have the following advantages: 1. This application introduces nano-scale hydrophobic materials into the melamine-impregnated adhesive. After the adhesive paper is cured, a dense low-surface-energy protective layer is formed. The nano-material fills the microscopic pores on the surface, reducing the attachment sites for pollutants. Tests have shown that the adhesion rate of common pollutants (oil stains, ink, fingerprints) is reduced by more than 80%, and cleaning only requires a simple wipe. This application can be directly pressed onto substrates such as density board and particle board, and the finished decorative panel complies with the EN 14323 standard (fouling resistance of furniture surfaces).

[0009] 2. The static water contact angle of this application is ≥110° (ordinary melamine paper is only 60°~80°), meeting the superhydrophobic standard; by adding a fluorocarbon modifier, the surface energy of this application is reduced to below 20 mN / m (traditional products are about 35 mN / m), close to the surface of a lotus leaf (about 18 mN / m). After 500 hours of UV aging test, the contact angle of this application decayed by <5%, and its durability is significantly better than that of wax coating.

[0010] 3. The anti-fingerprint melamine-impregnated paper of this application exhibits a biomimetic lotus leaf effect. A water droplet (5 μL) sliding on a surface inclined at 10° exhibits a sliding speed greater than 5 cm / s and a rolling angle less than 10°, achieving self-cleaning properties. A pressing process controls the relief template to form a micron-nano composite structure (similar to the papillae of a lotus leaf), enhancing hydrophobicity. DETAILED DESCRIPTION

[0011] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0012] The present invention will be described in detail below with reference to examples.

[0013] Example 1 4800 kg of formaldehyde and 2000 kg of water were added to the reactor and the pH was adjusted to 7-9. 4000 kg of melamine was added and mixed and stirred for (0.5) h. 150 kg of diethylene glycol was added and mixed and stirred for 20 minutes. 53.38 kg of γ-glycidyloxypropyltrimethylsilane was added and stirred again for 0.5 h. The temperature was raised to 90°C. 20 kg of N-fluoro-4-nitro-N-(phenylsulfonyl)benzenesulfonamide was added and the pH was adjusted to 8-9. The reaction was carried out by keeping the temperature for 3 hours. The temperature was then lowered and the material was discharged.

[0014] After discharging, the modified melamine resin is poured into the first and second dipping tanks. The curing time for the first dip is adjusted to 7-9 minutes, and the curing time for the second dip is 5-6 minutes. During the dipping process, the oven temperature is adjusted to 95°C, 100°C, and 105°C for the first dip, and 100°C, 105°C, 120°C, 130°C, 130°C, 120°C, 110°C, and 100°C for the second dip. The volatile matter content of the impregnated adhesive film is adjusted to 5-9, and the pre-curing degree is controlled at 25-50. The modified adhesive film is pressed at a temperature of 170-195°C and a pressing time of 25-35 seconds. After pressing, the decorative panel has excellent anti-fingerprint properties.

[0015] Example 2 4800 kg of formaldehyde and 2000 kg of water were added to a reactor and the pH was adjusted to 7-9. 4000 kg of melamine was added and stirred. 150 kg of diethylene glycol was added and stirred for 20 minutes. 50 kg of γ-aminopropyltriethoxysilane was added and stirred again. The temperature was raised to 90°C. 20 kg of N-fluoro-4-nitro-N-(phenylsulfonyl)benzenesulfonamide was added and the pH was adjusted to 8-9. The reaction was carried out by keeping the temperature for 3 hours. The temperature was then lowered and the material was discharged.

[0016] After discharging, modify the melamine resin, adjust the curing time of the first dip to 7-9 minutes, and the curing time of the second dip to 5-6 minutes, and put it into the first and second dip glue tanks. During dipping, adjust the temperature of the first dip oven to 95℃, 100℃, and 105℃; adjust the temperature of the second dip oven to 100℃, 105℃, 120℃, 130℃, 130℃, 120℃, 110℃, and 100℃. Adjust the volatile matter of the impregnated film paper to 5-9, and control the pre-curing degree at 25-50.

[0017] The lamination temperature of the modified adhesive film paper is 170-195℃, and the lamination time is 25-35 seconds. After lamination, the decorative panel has excellent anti-fingerprint effect.

[0018] Example 3 4800 kg of formaldehyde and 2000 kg of water were added to a reactor and the pH was adjusted to 7-9. 4000 kg of melamine was added and mixed and stirred. 150 kg of diethylene glycol was added and mixed and stirred for 20 minutes. 82.31 kg of hexadecyltrimethylammonium bromide was added and stirred again. The temperature was raised to 90°C. 20 kg of N-fluoro-4-nitro-N-(phenylsulfonyl)benzenesulfonamide was added and the pH was adjusted to 8-9. The mixture was kept warm for 3 hours for reaction and then cooled and discharged.

[0019] After discharging, modify the melamine resin, adjust the curing time of the first dip to 7-9 minutes, and the curing time of the second dip to 5-6 minutes, and put it into the first and second dip glue tanks. During dipping, adjust the temperature of the first dip oven to 95℃, 100℃, and 105℃; adjust the temperature of the second dip oven to 100℃, 105℃, 120℃, 130℃, 130℃, 120℃, 110℃, and 100℃. Adjust the volatile matter of the impregnated film paper to 5-9, and control the pre-curing degree at 25-50.

[0020] The lamination temperature of the modified adhesive film paper is 170-195℃, and the lamination time is 25-35 seconds. After lamination, the decorative panel has excellent anti-fingerprint effect.

[0021] Comparative Example 1 4800 kg of formaldehyde and 2000 kg of water were added to the reactor and the pH was adjusted to 7-9. 4000 kg of melamine was added and mixed and stirred for (0.5) h. 150 kg of diethylene glycol was then added and mixed and stirred for 20 minutes. 53.38 kg of γ-glycidyloxypropyltrimethylsilane was added and stirred again for 0.5 h. The temperature was raised to 90°C, the pH was adjusted to 8-9, and the reaction was carried out by keeping the temperature for 3 hours. Finally, the temperature was lowered and the material was discharged.

[0022] After discharging, the modified melamine resin is poured into the first and second dipping tanks, and the curing time of the first dipping is adjusted to 7-9 minutes, and the curing time of the second dipping is 5-6 minutes. During dipping, the temperature of the first dipping oven is adjusted to 95°C, 100°C, and 105°C, and the temperature of the second dipping oven is adjusted to 100°C, 105°C, 120°C, 130°C, 130°C, 120°C, 110°C, and 100°C. The volatile matter of the impregnated film paper is adjusted to 5-9, the pre-curing degree is controlled at 25-50, the modified film paper pressing temperature is 170-195°C, and the pressing time is 25-35 seconds.

[0023] Comparative Example 2 Add 4800 kg of formaldehyde and 2000 kg of water into a reactor and adjust the pH to 7-9. Add 4000 kg of melamine and mix and stir for (0.5) h. Then add 150 kg of diethylene glycol and mix and stir for 20 minutes. Heat to 90°C, then add 20 kg of N-fluoro-4-nitro-N-(phenylsulfonyl)benzenesulfonamide, adjust the pH to 8-9, keep warm for 3 hours to react, and finally cool and discharge.

[0024] After discharging, the modified melamine resin is poured into the first and second dipping tanks. The curing time for the first dip is adjusted to 7-9 minutes, and the curing time for the second dip is 5-6 minutes. During the dipping process, the oven temperature is adjusted to 95°C, 100°C, and 105°C for the first dip, and 100°C, 105°C, 120°C, 130°C, 130°C, 120°C, 110°C, and 100°C for the second dip. The volatile matter content of the impregnated adhesive film is adjusted to 5-9, and the pre-curing degree is controlled at 25-50. The modified adhesive film is pressed at a temperature of 170-195°C and a pressing time of 25-35 seconds. After pressing, the decorative panel has excellent anti-fingerprint properties.

[0025] Comparative Example 3 Add 4800 kg of formaldehyde and 2000 kg of water into the reactor and adjust the pH to 7-9. Add 4000 kg of melamine and mix and stir for (0.5) h. Then add 150 kg of diethylene glycol and mix and stir for 20 minutes. Heat to 90°C, adjust the pH to 8-9, keep warm for 3 hours to react, and finally cool and discharge.

[0026] After discharging, the modified melamine resin is poured into the first and second dipping tanks. The curing time for the first dip is adjusted to 7-9 minutes, and the curing time for the second dip is 5-6 minutes. During the dipping process, the oven temperature is adjusted to 95°C, 100°C, and 105°C for the first dip, and 100°C, 105°C, 120°C, 130°C, 130°C, 120°C, 110°C, and 100°C for the second dip. The volatile matter content of the impregnated adhesive film is adjusted to 5-9, and the pre-curing degree is controlled at 25-50. The modified adhesive film is pressed at a temperature of 170-195°C and a pressing time of 25-35 seconds. After pressing, the decorative panel has excellent anti-fingerprint properties.

[0027] Table 1 Effect table of Example 1 to Example 3

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing anti-fingerprint melamine impregnated paper, characterized in that: The steps include: S1: Formaldehyde, melamine, diethylene glycol, and a hydrophobic and oleophobic additive are mixed and stirred, a fluorocarbon modifier is added after heating, and the mixture is kept warm to react to obtain a modified melamine resin; S2: The base paper is impregnated and cured twice with the modified melamine resin obtained in step S1 to obtain anti-fingerprint melamine impregnated paper.

2. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 1, wherein: The fluorocarbon modifier in step S1 includes one or more of perfluorooctane sulfonate, perfluorooctanoic acid, and N-fluoro-4-nitro-N-(phenylsulfonyl)benzenesulfonamide.

3. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 1, wherein: In step S1, the hydrophobic and oleophobic additives include one or more of polyethylene wax emulsion, hexadecyltrimethylammonium bromide, γ-glycidyloxypropyltrimethylsilane, and γ-aminopropyltriethoxysilane silicon modifier; The molar ratio of formaldehyde, melamine, diethylene glycol, hydrophobic and oleophobic additive, and fluorocarbon modifier is: 1.9:1:0.1:1.1-1.3:1-1.

2.

4. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 1, wherein: Step S1 further includes dissolving formaldehyde in water and adjusting the pH to 7-9, adding melamine and stirring for 30 minutes, adding diethylene glycol and stirring for 18-22 minutes, and then adding a hydrophobic and oleophobic additive and stirring for 20 minutes; And / or, the temperature at which the fluorocarbon modifier is added after heating is 85-95°C.

5. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 1, wherein: After adding the fluorocarbon modifier, adjust the pH to 8-9 and carry out the heat preservation reaction for 2.5-3.5 hours.

6. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 1, wherein: The time for the two immersion curing in step S2 is 7-9 minutes and 5-6 minutes respectively.

7. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 1, wherein: Step S2 also includes injecting the modified melamine resin into the first and second dipping tanks. During dipping, the temperature of the first dipping oven is 95°C, 100°C, and 105°C, and the temperature of the second dipping oven is 100°C, 105°C, 120°C, 130°C, 130°C, 120°C, 110°C, and 100°C.

8. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 7, wherein: The volatile matter of the impregnated film paper is adjusted to 5-9, and the pre-curing degree is controlled at 25-50.

9. The method for preparing the anti-fingerprint melamine impregnated paper according to claim 7, wherein: The pressing temperature of the anti-fingerprint melamine impregnated paper is 170-195°C, and the pressing time is 25-35 seconds.

10. The anti-fingerprint melamine impregnated paper prepared by the method for preparing the anti-fingerprint melamine impregnated paper according to any one of claims 1 to 9.

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