CN109371757B - Decorative material with pearl effect, decorative paper, preparation method of decorative paper and decorative board - Google Patents
Decorative material with pearl effect, decorative paper, preparation method of decorative paper and decorative board Download PDFInfo
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- CN109371757B CN109371757B CN201811273938.5A CN201811273938A CN109371757B CN 109371757 B CN109371757 B CN 109371757B CN 201811273938 A CN201811273938 A CN 201811273938A CN 109371757 B CN109371757 B CN 109371757B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/53—Polyethers; Polyesters
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
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Abstract
The invention discloses a decorative material with a pearly-luster effect, decorative paper applied to the decorative material with the pearly-luster effect, a preparation method of the decorative paper and a decorative board applying the decorative paper, wherein the decorative material with the pearly-luster effect comprises impregnating resin, surface coating resin and back coating resin, and the impregnating resin comprises the following components in parts by mass: 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent; the top coating resin contains 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent; the back coating resin contains 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent; wherein the particle size of the pearl powder in the first pearl powder solution is different from the particle size of the pearl powder in the second pearl powder solution. The technical scheme of the invention can improve the compatibility of the pearl powder and the resin, thereby solving the problem of compatibility of the pearl powder and the printing ink in the existing gum dipping process.
Description
Technical Field
The invention relates to the technical field of decorative materials, in particular to a decorative material with a pearly-luster effect, decorative paper applied to the decorative material with the pearly-luster effect, a preparation method of the decorative paper and a decorative board applying the decorative paper.
Background
With the continuous development of the decoration printing industry, the application range of the pearlescent ink on the surface layers of various decorative materials becomes wider and wider due to the unique visual effect, and the pearlescent ink is also favored by the industry gradually.
The pearl essence in the pearl essence printing ink belongs to an insoluble pigment, and can be completely wetted and dissolved by a reagent with good affinity, so that problems often occur in the gravure printing use process: firstly, in the printing process, because the compatibility of the pearl powder and the water-based ink is poor and the practical effect of the pearl binder is not ideal, the pearl ink cannot be printed on the surface layer of the decorative material and the leveling property of the pearl ink is poor; secondly, because the granularity of the pearl powder is large, the pearl powder is easy to precipitate in the mesh of the printing roller, if the anti-precipitation agent is added, the concentration of the printing ink is improved, the fluidity is reduced, and the printing requirement cannot be met; thirdly, an impregnation process is needed in the gravure pearlescent ink printing process, and in the process, the pearlescent powder is easily separated out into the impregnating resin, so that the impregnating resin is difficult to impregnate into the printing paper fibers, and the final product effect cannot meet the requirement.
Disclosure of Invention
The invention mainly aims to provide a decorative material with a pearl effect, and aims to improve the compatibility of pearl powder and resin, so that the problem of compatibility of the pearl powder and ink in the existing gum dipping process is solved.
In order to achieve the above object, the present invention provides a decorative material with pearlescent effect, which comprises an impregnating resin, a top-coating resin and a back-coating resin, wherein the impregnating resin comprises, by mass: 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent; the top coating resin contains 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent; the back coating resin contains 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent; wherein the particle size of the first pearl essence in the first pearl essence solution is different from the particle size of the second pearl essence in the second pearl essence solution.
Optionally, the first pearl powder emulsion contains, by mass: 50-80 parts of first pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water; the second pearlescent powder emulsion contains: 50-80 parts of second pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water.
Optionally, the particle size of the inner core of the first pearl powder is 25-27 μm, and the thickness of the coating layer on the outer surface is 0.25-0.4 μm; the grain diameter of the inner core of the second pearl powder is 27-30 μm, and the thickness of the coating layer on the outer surface is 0.4-0.6 μm.
Alternatively, the melamine modified urea resin contains, in parts by mass: 320-360 parts of urea; 60-80 parts of melamine; 37 percent formaldehyde solution, 630 and 670 parts; and 1.5-2 parts of a buffering agent.
Optionally, the buffer is hexamethylenetetramine or triethanolamine.
Alternatively, the melamine formaldehyde resin comprises, in parts by mass: 37 percent formaldehyde solution, 470 and 500 parts; 390-410 parts of melamine; 35-45 parts of diethylene glycol; and caprolactam 55-65 parts.
The invention also provides a preparation method of the decorative paper, which comprises the following steps:
providing printing base paper;
mixing 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent by mass, and stirring and mixing to obtain impregnating resin;
mixing 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent by mass, and stirring and mixing to obtain surface coating resin;
mixing 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent by mass, and stirring and mixing to obtain back coating resin;
and sequentially coating the impregnating resin and the surface coating resin on one surface of the printing base paper, coating the back coating resin on the other surface of the printing base paper, and curing to obtain the decorative paper.
Optionally, the printing base paper is coated with, in parts by mass per square meter: 70-90 parts of impregnating resin; 30-50 parts of top coating resin; and back coating resin 30-50 parts; and/or the decorative paper has a thickness of 90-130 μm.
The invention also provides decorative paper, and the decorative paper is prepared by the preparation method.
The invention also provides a decorative board which comprises a substrate and the decorative paper, wherein the decorative paper is attached to the surface of the substrate in a pressing mode.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the decorative material with the pearl effect comprises impregnating resin, surface coating resin and back coating resin, wherein the impregnating resin contains first pearl powder emulsion, melamine modified urea resin and a penetrating agent; the top coating resin contains second pearl powder emulsion, melamine formaldehyde resin, a curing agent, a release agent and a dedusting agent; the back coating resin contains melamine formaldehyde resin, a curing agent and a dedusting agent. Because the first pearl essence emulsion and the second pearl essence emulsion are added, the decorative material can show attractive luster like pearls or metal, and the first pearl essence in the impregnating resin and the second pearl essence in the surface coating resin have different particle sizes, so that the prepared decorative material has different longitudinal particle sizes of the pearl essences, and the decorative material has pearl luster and gorgeous property. When the impregnating resin is used in the impregnation process, the resin can be well impregnated into the fibers of the printing paper, so that the effect of the finally prepared product can meet the requirement. Meanwhile, the auxiliary agents of a penetrating agent, a curing agent, a release agent and a dust removing agent are added to improve the permeability, the curing capability, the release property and the dust removing performance of the resin; and the first pearl essence emulsion and the second pearl essence emulsion can be well compounded with resin, and the compatibility is good. Therefore, the pearl ink does not need to be prepared in advance, and the problem of compatibility of pearl powder and ink in the existing gum dipping process is solved.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a decorative material with a pearl effect, which comprises impregnating resin, surface coating resin and back coating resin, wherein the impregnating resin comprises the following components in parts by mass: 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent; the top coating resin contains 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent; the back coating resin contains 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent; wherein the particle size of the first pearl powder in the first pearl powder solution is different from the particle size of the second pearl powder in the second pearl powder solution.
The first pearl essence emulsion and the second pearl essence solution are both water-soluble emulsions and have good cohesiveness and leveling property. The melamine modified urea-formaldehyde resin has good cementation property, water resistance and light resistance, and the cured urea-formaldehyde resin has high transparency and no color at a cementing seam; meanwhile, the formaldehyde emission is low, and the environment is relatively protected. After the addition, the impregnating resin is well impregnated in the fibers of the printing paper, so that the finally obtained product can meet the requirements. In order to improve the impregnation properties of melamine-modified urea-formaldehyde resins, it is common to add a penetrant. The melamine formaldehyde resin has higher bonding strength and chemical activity and stronger low-temperature curing capability, and after the melamine formaldehyde resin is added, the dispersion effect of the second pearl powder emulsion can be further improved, so that the prepared surface coating resin has better pearl effect uniformity. In order to improve various performances of the melamine formaldehyde resin, some auxiliary agents are required to be added, and the auxiliary agents are a curing agent, a release agent and a dust removal agent, and after the auxiliary agents are added, the top coating resin and the back coating resin have strong low-temperature curing capacity, good release performance and excellent dust removal effect. The particle size of the first pearl powder in the first pearl powder solution is different from the particle size of the second pearl powder in the second pearl powder solution, the particle size of the first pearl powder can be larger than that of the second pearl powder, and the particle size of the first pearl powder can also be smaller than that of the second pearl powder.
The dosage of each raw material in the formula of the impregnating resin is reasonable and moderate, so that the prepared impregnating resin has good pearling effect and impregnating performance, and the low-temperature curing capability is strong. For example, 8 parts, 9 parts, or 10 parts of the first pearl powder emulsion is adopted; 100 parts, 120 parts, or 150 parts of melamine modified urea resin; 1.2 parts, 1.3 parts, or 1.5 parts of a curing agent; 0.2 part or 0.3 part of penetrating agent. The dosage of each raw material in the formula of the top-coating resin is reasonable and moderate, and 8-10 parts of the second pearl powder emulsion enables the prepared top-coating resin to have good compatibility, leveling property, strong low-temperature curing capability, demoulding property and dust removal effect. For example, using 8 parts, 9 parts, or 10 parts of the second pearlescent powder emulsion; 100 parts, 125 parts, or 150 parts of melamine formaldehyde resin; 1.2 parts, 1.4 parts, or 1.5 parts of a curing agent; 0.2 part, 0.25 part or 0.3 part of a release agent; and 0.2 part or 0.3 part of dedusting agent. The back coating resin has reasonable and moderate consumption of raw materials, so that the prepared back coating resin has better compatibility, leveling property, stronger low-temperature curing capability and dust removal effect. For example, 100 parts, 125 parts, or 150 parts of melamine formaldehyde resin; 1.2 parts, 1.3 parts, or 1.5 parts of a curing agent; and 0.2 part or 0.3 part of dedusting agent.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the decorative material with the pearl effect comprises impregnating resin, surface coating resin and back coating resin, wherein the impregnating resin contains first pearl powder emulsion, melamine modified urea resin and a penetrating agent; the top coating resin contains second pearl powder emulsion, melamine formaldehyde resin, a curing agent, a release agent and a dedusting agent; the back coating resin contains melamine formaldehyde resin, a curing agent and a dedusting agent. Because the first pearl essence emulsion and the second pearl essence emulsion are added, the decorative material can show attractive luster like pearls or metal, and the first pearl essence in the impregnating resin and the second pearl essence in the surface coating resin have different particle sizes, so that the prepared decorative material has different longitudinal particle sizes of the pearl essences, and the decorative material has pearl luster and gorgeous property. When the impregnating resin is used in the impregnation process, the resin can be well impregnated into the fibers of the printing paper, so that the effect of the finally prepared product can meet the requirement. Meanwhile, the auxiliary agents of a penetrating agent, a curing agent, a release agent and a dust removing agent are added to improve the permeability, the curing capability, the release property and the dust removing performance of the resin; and the first pearl essence emulsion and the second pearl essence emulsion can be well compounded with resin, and the compatibility is good. Therefore, the pearl ink does not need to be prepared in advance, and the problem of compatibility of pearl powder and ink in the existing gum dipping process is solved.
The first pearl powder emulsion comprises the following components in parts by mass: 50-80 parts of first pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water; the second pearl powder emulsion contains: 50-80 parts of second pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water.
The particle size of the inner core of the first pearl powder and the thickness of the outer surface coating layer of the second pearl powder are different, the pearl powder is a novel pigment with pearl luster generated by covering metal oxide outside a natural mica thin skin, and the pearl powder is added into the surface layers of various decorative materials, so that the pearl powder can present better pearl luster, has extremely strong decoration effect and can improve the wear resistance of the pearl powder. The metal oxide coated on the surface of the pearl powder is a metal oxide with a high refractive index, and is generally titanium oxide, iron oxide, zinc oxide, and the like. The carrier resin is used for pre-dispersing the pearl powder, generally, a polymer dispersion liquid is selected, and water is added to prepare the carrier resin into an aqueous dispersion liquid for pre-dispersing the pearl powder. The carrier resin is selected from polyethylene glycol with the molecular weight of 200-400. The polyethylene glycol with the molecular weight is colorless transparent liquid, and can quickly prepare a polyethylene glycol aqueous solution after being added with water, and the aqueous solution is used for pre-dispersing pearl powder to prepare pearl powder emulsion. The polyethylene glycol carrier resin can react with the melamine formaldehyde resin, and the curing form of the resin can not be changed by adding a small amount of the polyethylene glycol carrier resin, and the water resistance and the flexibility of the resin can also be changed. The polyethylene glycol saturated aqueous solution has special viscosity behavior, and can continuously generate sol-gel transformation at a critical value, so that the pearl powder has better wrapping and suspending effects. The silane coupling agent is a low (high) molecular compound with two ends containing functional groups with different properties capable of reacting with inorganic substances and organic substances respectively, one end can react with inorganic substance molecules, the other end can react with organic substance molecules, and the two materials with different properties are firmly combined together in a chemical bond mode. The coupling agent plays a role of molecular bridge between the cross sections of two different substances through chemical reaction or physical adsorption, thereby improving the wetting property of the adhesive, increasing the bonding property of the interface, eliminating the internal stress and improving the durability in use. It is understood that the silane coupling agent is an auxiliary agent having an amphoteric structure and a unique function, and can improve the adhesion between inorganic substances and organic substances. Also an adhesion promoter or surface treatment agent. After the silane coupling agent is added, the bonding effect of the pearl powder emulsion can be enhanced. After the dispersing agent is added, the dispersing agent can be well compatible with the carrier resin, and meanwhile, the dispersing agent is adsorbed on the surfaces of the pearl powder particles to generate charge repulsion force or steric hindrance and reduce the cohesive force among the particles, so that agglomeration or flocculation is prevented, and a dispersion system is in a stable state.
The carrier resin in the pearl powder emulsion can also react with the melamine formaldehyde resin, and the curing form of the pearl powder emulsion can not be changed by adding a small amount of the carrier resin, and the water resistance and the flexibility of the pearl powder emulsion can also be changed.
Preferably, the silane coupling agent is sulfonyl azide silane coupling agent or silane coupling agent KH-550. Alkoxy in the sulfonyl azide silane coupling agent can be hydrolyzed into silanol when meeting water and reacts with active groups on the surfaces of other macromolecular compounds to form a bond, and sulfonyl azide at the other end can be activated at a certain temperature to generate an active compound, namely naphthalene-derived derivative [ OSi (OH)2RSO2N.]It is a strong Lewis base, and can combine with hydrogen atom on the carbon of polymer parent body to play a coupling role, thereby improving the wetting property, increasing the bonding property of the section, eliminating the internal stress and improving the durability in use. Naturally, the silane coupling agent can also be selected from KH-550, and the bonding effect of the pearl powder emulsion can also be enhanced by adding the silane coupling agent.
Preferably, the dispersant is ethyl cellulose or polyvinyl alcohol. The ethyl cellulose dispersant is nonionic cellulose ether and can be well compatible with carrier resin polyethylene glycol, and the ethyl cellulose dispersant can generate charge repulsion force or steric hindrance and reduce the cohesive force among particles when adsorbed on the surfaces of pearl powder particles, so that agglomeration or flocculation is prevented, and a dispersion system is in a stable state. Certainly, polyvinyl alcohol can be selected, and the polyvinyl alcohol dispersing agent not only can enable pearly luster and carrier resin to be compatible, but also has better cohesiveness and can enhance the cohesiveness effect of the pearl powder emulsion.
Preferably, the curing agent is a morpholine curing agent. After the morpholine curing agent is added, the melamine formaldehyde resin can be cured quickly, and basically no bubbles are generated when the morpholine curing agent is applied to the surface of impregnated printing paper, so that the effect is good.
Optionally, the particle size of the inner core of the first pearl powder is 25-27 μm, and the thickness of the coating layer on the outer surface is 0.25-0.4 μm; the grain diameter of the inner core of the second pearl powder is 27-30 μm, and the thickness of the coating layer on the outer surface is 0.4-0.6 μm.
The particle size of the inner core of the first pearl powder and the thickness of the outer surface coating of the second pearl powder are different, and the particle size of the inner core of the second pearl powder and the thickness of the outer surface coating of the second pearl powder are larger than the particle size of the inner core of the first pearl powder and the thickness of the outer surface coating of the first pearl powder. Meanwhile, the particle size of the inner core and the thickness of the outer surface coating layer of the first pearl powder and the second pearl powder are also selected reasonably and moderately, so that the precipitation phenomenon is not easy to occur when the pearl powder is applied to a gum dipping process, and the prepared pearl powder has good emulsion fluidity and can meet the printing requirement. If the particle size of the inner core of the pearl powder is more than 30 μm, agglomeration or flocculation between particles is easy to occur, and thus a precipitation phenomenon occurs.
Alternatively, the melamine modified urea resin contains, in parts by mass: 320-360 parts of urea; 60-80 parts of melamine; 37 percent formaldehyde solution, 630 and 670 parts; and 1.5-2 parts of a buffering agent.
Specifically, the melamine modified urea resin mainly comprises the following preparation processes: adding melamine, 37% formaldehyde solution and a buffering agent into a four-neck flask, adding 7 drops of 20% sodium hydroxide solution, controlling the pH value to be 8.5, and starting heating; when the temperature reaches 40 ℃, adding urea, continuing to heat, and controlling the temperature rise time of 40-80 ℃ to be 40 minutes; when the temperature reaches 80 ℃, preserving the heat for 55 minutes, and testing the zero degree of reactants to generate a light fog point; the fog point condition of 10 ℃, 20 ℃ and 30 ℃ is tested every ten minutes, when the fog point appears at 30 ℃, the urea is stopped adding, and 6 drops of 20% sodium hydroxide solution are added, and the pH value is controlled to be 7.5. In the invention, urea is used as a monomer for polymerization, urea and formaldehyde are subjected to addition reaction in an alkaline environment, and the addition product is polymerized under acid condition to obtain the urea-formaldehyde resin. Finally, discharging, standing for 3 hours, testing the index of the resin, and the performance parameters are shown in table 1.
TABLE 1 Performance test results of melamine modified Urea-formaldehyde resins
| Viscosity/s | pH value | Density/g.cm-3 | Water soluble ratio | Free formaldehyde/mg/L | Solid content | |
| Standard index | 12-14 | 7-7.5 | 1.170-1.175 | 2.0-2.7 | ≤1.0 | 40-43 |
| Resin preparation | 13.5 | 7.5 | 1.173 | 2.4 | 0.5 | 42 |
As can be seen from the data in Table 1, various performance parameters of the prepared melamine modified urea-formaldehyde resin all meet the standard indexes, which indicates that the obtained melamine modified urea-formaldehyde resin is qualified.
Optionally, the buffer is hexamethylenetetramine or triethanolamine. When the melamine modified urea resin is prepared, the reaction environment is an acid environment, and hexamethylenetetramine or triethanolamine is selected, so that the whole acid environment can be buffered, the pH value of the urea resin shows a gentle change, and the reaction can be effectively ensured to be carried out smoothly.
Alternatively, the melamine formaldehyde resin comprises, in parts by mass: 37 percent formaldehyde solution, 470 and 500 parts; 390-410 parts of melamine; 35-45 parts of diethylene glycol; and caprolactam 55-65 parts.
Specifically, the preparation process of the melamine formaldehyde resin comprises the following steps: adding melamine, 37% formaldehyde solution, diethylene glycol and water into a four-neck flask, adding 7 drops of 20% sodium hydroxide solution, controlling the pH value to be 9.0, and starting heating; when the temperature reaches 78 ℃, the solution is gradually cleared, at the moment, caprolactam is added, the heating is continued, when the temperature is increased to 90 ℃, the temperature is kept for 80 minutes, and the condition that the zero degree of a reactant has a light fog point is tested; the fog point condition of 10 ℃, 20 ℃ and 30 ℃ is tested every ten minutes, when the fog point appears at 30 ℃, the urea is stopped adding, and 6 drops of 20% sodium hydroxide solution are added, and the pH value is controlled to be 8.5. Finally, discharging, standing for 3 hours, testing the index of the resin, and the performance parameters are shown in Table 2.
As can be seen from the data in Table 2, various performance parameters of the prepared melamine formaldehyde resin all meet the standard indexes, which indicates that the obtained melamine formaldehyde resin is qualified.
TABLE 2 Performance test results of Melamine Formaldehyde resin Table
In the melamine-formaldehyde resin, melamine and formaldehyde are used as reactants to generate the melamine-formaldehyde resin, and diethylene glycol and caprolactam are adopted to modify the melamine-formaldehyde resin, so that the melamine-formaldehyde resin is prevented from cracking and has good moisture retention performance and flexibility.
The invention also provides a preparation method of the decorative paper, which comprises the following steps:
providing printing base paper;
mixing 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent by mass, and stirring and mixing to obtain impregnating resin;
mixing 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent by mass, and stirring and mixing to obtain surface coating resin;
mixing 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent by mass, and stirring and mixing to obtain back coating resin;
and sequentially coating impregnating resin and the top coating resin on one surface of the printing base paper, coating the back coating resin on the other surface of the printing base paper, and curing to obtain the decorative paper.
Specifically, the melamine modified urea-formaldehyde resin, the curing agent, the release agent and the dedusting agent are sequentially poured into a dispersion machine, and low-speed stirring is adopted for 30-40 min. And then adding the first pearl essence emulsion into the solution to compound the pearl essence and the resin, and finally preparing the impregnating resin. The dipping resin has a good pearling effect, and melamine formaldehyde resin, a curing agent, a release agent and a dedusting agent are sequentially poured into a dispersion machine, and are stirred at a low speed for 30-40 min. And then adding the second pearl powder emulsion into the mixture to compound the pearl powder and the resin to finally obtain the surface coating resin, wherein the surface coating resin has better pearling effect, curing, demoulding and dedusting effects. The melamine formaldehyde resin, the curing agent and the dedusting agent are sequentially poured into a dispersion machine, low-speed stirring is adopted, the stirring time is 30-40min, and the back coating resin is prepared and has good pearling effect, curing effect and dedusting effect.
The base material of the decorative paper is selected from printing base paper, the printing base paper comprises a base paper layer and an ink layer, and the ink layer is the front surface of the printing base paper. The front side of the printing base paper is coated with the impregnating resin firstly, and as the impregnating resin has better cementation and impregnation, part of the impregnating resin can be impregnated in the fiber of the printing paper, so that the bonding firmness of the impregnating resin and the printing paper can be improved, and meanwhile, the fiber of the printing base paper also has a pearly luster effect. And then, sequentially putting the printing paper coated with the impregnating resin into three ovens for curing, wherein the temperatures of the three ovens are 145 ℃, 160 ℃ and 150 ℃, and the total curing time is 8-9 minutes. After the impregnating resin is cured, coating surface coating resin on the surface of the impregnating resin, and sequentially putting the impregnating resin into four drying ovens for curing, wherein the temperatures of the four drying ovens are 145 ℃, 160 ℃ and 150 ℃, and the total curing time is 5-6 minutes. Because the surface coating resin has better pearling effect and dust removal effect, the finally prepared decorative paper also has better pearling effect and dust removal effect. And the pearl powder in the impregnating resin and the pearl powder in the surface coating resin have different core particle sizes and surface coating layer thicknesses, namely the longitudinal particle size distribution of the pearl powder is different, so that the prepared decorative paper has more pearl gorgeous property. And finally, after the surface coating resin is cured, coating back coating resin on the back surface of the printing base paper, and sequentially putting the printing base paper into four ovens for curing, wherein the temperatures of the four ovens are 145 ℃, 160 ℃ and 150 ℃, and the total curing time is 5-6 minutes. Because the back coating resin has better dust removal effect, the finally prepared decorative paper has better dust removal effect on the front surface and the back surface, and the front surface has better pearling effect. The process for preparing the decorative paper is simple and convenient, and does not need to prepare pearlescent ink in advance, thereby effectively solving the problem of compatibility of pearlescent powder and the ink in the existing gum dipping process.
Optionally, the printing base paper is coated with, in parts by mass per square meter: 70-90 parts of impregnating resin; 30-50 parts of top coating resin; and 30-50 parts of back coating resin.
Optionally, the decorative paper has a thickness of 90 μm to 130 μm. Wherein the thickness of the printing base paper is 60-100 μm, the thickness of the coating impregnating resin layer is 12-18 μm, the thickness of the coating surface coating resin layer is 17-23 μm, and the thickness of the coating back coating resin layer is 12-18 μm.
The invention also provides decorative paper which is prepared by the preparation method. The prepared decorative paper is subjected to various physical and chemical performance index tests, and the test results are recorded in table 3.
TABLE 3 physical and chemical properties index result table of decorative paper
As can be seen from the data in Table 3, the physical and chemical properties of the decorative paper prepared by the method meet the requirements, the decorative paper has a good pearlescent effect, the impregnating resin can be well impregnated in the fibers of the printing paper, and meanwhile, the formaldehyde emission is small, the environmental pollution is small, and the decorative paper is environment-friendly.
The invention also provides a decorative board, which comprises a substrate and decorative paper, wherein the decorative paper is attached to the surface of the substrate in a pressing manner. Specifically, the decorative paper with the pearl effect is pressed and attached to the surface of the substrate through a press under the conditions of 180 ℃ and 10MPa of pressure, and the decorative board with the pearl effect can be prepared. Because the surface layer of the decorative paper is doped with the pearl powder particles, the prepared decorative board has stronger wear-resisting property. And the prepared decorative board is subjected to various performance tests, and the test results are shown in table 4.
Table 4 table of performance index test results of decorative board
| Detecting items | Unit of | Index value |
| Surface cold and hot resistance circulation | / | No cracking and no bubbling |
| Surface scratch resistance | / | No whole circle continuous scratch on the surface of more than or equal to 4.0N |
| Surface wear resistance | Rotating shaft | The pattern is reserved for 70 percent in 200 turns |
| Surface resistance to cigarette ignition | / | No black spots, cracks and bubbles |
| Surface dry heat resistance | / | No cracking and no bubbling |
| Surface resistant to contamination and corrosion | / | No pollution and corrosion |
| Surface crack resistance | / | Observed with a six-time magnifier, and the surface has no cracks |
| Color fastness to light index | / | Grade 6 |
| Formaldehyde emission | mg/L | 0.3 |
As can be seen from the data in table 4, the decorative sheet prepared by the present invention has wear resistance higher than that of a common decorative sheet, that is, compared with the existing decorative sheet which retains 50% of the printed patterns after 100 revolutions, the decorative sheet of the present invention can retain 70% of the printed patterns after 200 revolutions, and the wear resistance is greatly improved, mainly because the pearl powder particles are used as inorganic material particles, and the wear resistance of the product can be improved after the pearl powder particles are added. Meanwhile, the decorative plate prepared by the method has the advantages of good surface performance, corrosion resistance, pollution resistance, low formaldehyde emission and environmental protection.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. The decorative material with the pearl effect is characterized by comprising an impregnating resin, a surface coating resin and a back coating resin, wherein the impregnating resin comprises the following components in parts by mass: 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent; the top coating resin contains 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent; the back coating resin contains 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent; wherein the particle size of the first pearl essence in the first pearl essence emulsion is different from the particle size of the second pearl essence in the second pearl essence emulsion;
the first pearl powder emulsion comprises the following components in parts by mass: 50-80 parts of first pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water; the second pearlescent powder emulsion contains: 50-80 parts of second pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water; the molecular weight of the polyethylene glycol carrier resin is 200-400, and the silane coupling agent is sulfonyl azide silane coupling agent or silane coupling agent KH-550;
the grain size of the inner core of the first pearl powder is 25-27 mu m, and the thickness of the coating layer on the outer surface is 0.25-0.4 mu m; the grain diameter of the inner core of the second pearl powder is 27-30 μm, and the thickness of the coating layer on the outer surface is 0.4-0.6 μm.
2. The decorating material with pearl effect according to claim 1, wherein the melamine modified urea resin contains, by mass:
320-360 parts of urea;
60-80 parts of melamine;
37 percent formaldehyde solution, 630 and 670 parts; and
1.5-2 parts of a buffering agent.
3. The decorating material with pearl effect according to claim 2, wherein said buffer is hexamethylenetetramine or triethanolamine.
4. The decorating material with pearl effect according to claim 1, wherein said melamine formaldehyde resin contains, in parts by mass:
37 percent formaldehyde solution, 470 and 500 parts;
390-410 parts of melamine;
35-45 parts of diethylene glycol; and
55-65 parts of caprolactam.
5. A preparation method of decorative paper is characterized by comprising the following steps:
providing printing base paper;
mixing 8-10 parts of first pearl powder emulsion, 100-150 parts of melamine modified urea-formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of penetrating agent by mass, and stirring and mixing to obtain impregnating resin;
mixing 8-10 parts of second pearl powder emulsion, 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent, 0.2-0.3 part of release agent and 0.2-0.3 part of dedusting agent by mass, and stirring and mixing to obtain surface coating resin;
mixing 100-150 parts of melamine formaldehyde resin, 1.2-1.5 parts of curing agent and 0.2-0.3 part of dedusting agent by mass, and stirring and mixing to obtain back coating resin;
sequentially coating the impregnating resin and the surface coating resin on one surface of the printing base paper, coating the back coating resin on the other surface of the printing base paper, and curing to obtain the decorative paper;
wherein the particle size of the first pearl essence in the first pearl essence emulsion is different from the particle size of the second pearl essence in the second pearl essence emulsion;
the first pearl powder emulsion comprises the following components in parts by mass: 50-80 parts of first pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water; the second pearlescent powder emulsion contains: 50-80 parts of second pearl powder; polyethylene glycol carrier resin, 150-; 2-4 parts of a silane coupling agent; 15-20 parts of a dispersing agent; 100 portions and 150 portions of water; the molecular weight of the polyethylene glycol carrier resin is 200-400, and the silane coupling agent is sulfonyl azide silane coupling agent or silane coupling agent KH-550;
the grain size of the inner core of the first pearl powder is 25-27 mu m, and the thickness of the coating layer on the outer surface is 0.25-0.4 mu m; the grain diameter of the inner core of the second pearl powder is 27-30 μm, and the thickness of the coating layer on the outer surface is 0.4-0.6 μm.
6. The process for the production of decorative paper according to claim 5, characterized in that the printing base paper is coated with, in parts by mass per square meter: 70-90 parts of impregnating resin; 30-50 parts of top coating resin; and back coating resin 30-50 parts; and/or the decorative paper has a thickness of 90-130 μm.
7. Decorative paper, characterized in that it is produced by a process for the production of decorative paper according to any one of claims 5 to 6.
8. A decorative sheet comprising a substrate and the decorative paper of claim 7 laminated to a surface of the substrate.
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| CN111254750B (en) * | 2020-02-26 | 2022-07-26 | 广东天元汇邦新材料股份有限公司 | Melamine impregnated paper with electromagnetic wave absorption function and preparation method thereof |
| CN111875925A (en) * | 2020-07-29 | 2020-11-03 | 广东天元汇邦新材料股份有限公司 | Dual antistatic melamine resin and preparation method and application thereof |
| CN114059388A (en) * | 2021-11-15 | 2022-02-18 | 杭州中润华源装饰材料有限公司 | Wear-resistant high-color-fastness decorative paper and preparation method thereof |
| CN114086431B (en) * | 2021-11-15 | 2022-09-16 | 杭州中润华源装饰材料有限公司 | High-stain-resistance decorative paper and preparation method thereof |
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| DE19817286A1 (en) * | 1998-04-18 | 1999-10-21 | Merck Patent Gmbh | Multi-layer pearlescent pigment based on an opaque substrate |
| CN103911905A (en) * | 2014-03-28 | 2014-07-09 | 苏州市建诚装饰材料有限公司 | Method for manufacturing pearl bond paper through dip coating |
| CN104559874B (en) * | 2014-12-30 | 2017-01-04 | 佛山市天元汇邦装饰材料有限公司 | A kind of flame retardant type dipping glue and the application in preparing flame retardant type decorative lamination decoration board thereof |
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Effective date of registration: 20220527 Address after: 528137 planning of science and Technology Industrial Zone, Leping Town, Sanshui District, Foshan, Guangdong, 52, B (F1), (F2), (F3), (F5), (F7) Patentee after: GUANGDONG TIANYUAN HUIBANG NEW MATERIAL CO.,LTD. Patentee after: Hangzhou Chengyuan decoration materials Co., Ltd Address before: 528100 Science and Technology Industrial Zone of Leping Town, Sanshui District, Foshan City, Guangdong Province Planning Area B, Area 52 (F1), (F2), (F3), (F5), (F7) Patentee before: GUANGDONG TIANYUAN HUIBANG NEW MATERIAL CO.,LTD. Patentee before: FOSHAN NANHAI TIANYUAN MAOXIN NEW MATERIAL CO.,LTD. Patentee before: T&C DECORATIVE MATERIAL Co.,Ltd. |