CN114164712B - Preparation method of spray paper - Google Patents
Preparation method of spray paper Download PDFInfo
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- CN114164712B CN114164712B CN202111569710.2A CN202111569710A CN114164712B CN 114164712 B CN114164712 B CN 114164712B CN 202111569710 A CN202111569710 A CN 202111569710A CN 114164712 B CN114164712 B CN 114164712B
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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
- D21H27/18—Paper- or board-based structures for surface covering
- D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
- D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
- D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
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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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- 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
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/46—Non-macromolecular organic compounds
-
- 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
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- D21H21/14—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 characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
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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
- D21H21/50—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 characterised by form
- D21H21/52—Additives of definite length or shape
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
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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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
Abstract
The invention discloses a preparation method of spray paper, which is characterized by comprising the following steps: dipping the base paper of the decorative paper into dipping glue for dipping, and then drying to obtain dipping paper; spraying modified melamine formaldehyde resin glue on the surface of the impregnated paper, and then drying to obtain sprayed paper; the modified melamine-formaldehyde resin glue is prepared from nano aluminum oxide, ethanol, melamine, a formaldehyde aqueous solution, polyether polyol, acrylamide and deionized water. The decorative paper and the wear-resistant paper are combined into one, so that one process is omitted in the floor pressing and pasting process, and the production cost is reduced; the obtained product has the advantages of high surface hardness, strong wear resistance, good flexibility, high definition of decorative patterns, good decorative effect, low formaldehyde release amount, safety and environmental protection.
Description
Technical Field
The invention belongs to the technical field of manufacturing of spray paper, and particularly relates to a preparation method of spray paper.
Background
With the improvement of living standard, the requirements of people on the comfort and the aesthetic property of living environment are also continuously improved. As an important decorative material for interior decoration, the laminate flooring gradually replaces the traditional interior floor decorative materials such as cement, ceramic tiles and the like. In the production process of the laminate flooring, a layer of decorative paper is usually covered on the surface of a base material of the flooring, so that the flooring looks more beautiful; and a layer of wear-resistant paper is covered on the surface of the decorative paper so as to enhance the wear resistance of the floor and prolong the service life of the floor. The main production process at present combines and presses floor base materials, decorative paper and wear-resistant paper together, the process flow is complex, the production cost is high, the product surface decoration definition is low, and the attractiveness is difficult to embody.
CN101608417A discloses dry spraying decorative paper for manufacturing wood floor and a manufacturing process thereof. The dry spraying decorative paper comprises printing base paper printed with decorative patterns on the upper surface, an adhesive layer is coated on the upper surface of the printing base paper, a bonding adhesive layer for bonding a floor substrate layer is coated on the lower surface of the printing base paper, and a wear-resistant material layer is formed on the upper surface of the adhesive layer in a dry powder spraying modeThe upper surface of the wear-resistant material layer is coated with a covering glue layer. However, the wear-resistant material used in this method is Al 2 O 3 The use of cellulose, a mixture of powder particles and cellulose powder particles, results in poor clarity, while dry spraying causes dust pollution.
CN103147346A discloses a preparation method of a high-gloss wear-resistant decorative adhesive film paper, which comprises the steps of firstly soaking decorative paper in urea-formaldehyde resin solution, then placing the paper in a spraying area for spraying mixed solution of melamine resin solution and wear-resistant materials, then placing the paper in a coating area for coating the paper with the melamine resin solution, and drying the paper to obtain the high-gloss wear-resistant decorative adhesive film paper. However, the method has the defects of large brittleness, poor toughness, easy fracture and the like of the melamine resin, and meanwhile, the wear-resistant material has high dosage and the decorative definition is influenced.
CN110042699A discloses a preparation method of spray-coated paper. The method comprises the following steps: (1) Soaking base paper into impregnating adhesive containing modified urea-formaldehyde resin, penetrating agent, curing agent and water, rolling by using a roller, and then drying in an oven; (2) Spraying a spraying glue containing modified melamine-formaldehyde resin, modified urea-formaldehyde resin, a penetrating agent, a suspending agent, a defoaming agent, a curing agent, aluminum oxide and water onto the upper surface of the paper obtained in the step (1) by using spraying equipment, leveling by using a leveling roller, and then drying in an oven; (3) And (3) respectively coating the front side and the back side of the paper obtained in the step (2) with a round roller with a grid structure by using a net containing modified melamine-formaldehyde resin, a release agent, a dedusting agent, a curing agent and water, and then placing the paper in an oven for drying. The method forms a grid structure by coating the roll coating net with glue, and has decorative effect and wear-resisting effect on the surface layer. But the decorative layer has single effect and insufficient aesthetic degree.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of spray paper with both decorative aesthetic property and wear resistance.
In order to achieve the purpose, the invention adopts the following technical scheme.
A preparation method of spray paper comprises the following steps:
s1, immersing base paper of decorative paper into impregnating glue for gum dipping, and then drying to obtain impregnated paper;
s2, spraying modified melamine formaldehyde resin glue on the surface of the impregnated paper, and then drying to obtain sprayed paper;
the modified melamine-formaldehyde resin glue is prepared from nano aluminum oxide, ethanol, melamine, a formaldehyde aqueous solution, polyether polyol, acrylamide and deionized water.
The surface of the decorative base paper can be printed with various decorative patterns, thereby improving the aesthetic property.
Preferably, the impregnating compound is urea-formaldehyde resin glue or melamine-formaldehyde resin glue.
Preferably, the particle size of the nano alumina is 10-100 nm.
Preferably, the modified melamine formaldehyde resin glue comprises the following raw materials in parts by weight: 3-5 parts of nano aluminum oxide, 2-5 parts of ethanol, 10-20 parts of melamine, 20-40 parts of formaldehyde aqueous solution, 10-15 parts of polyether polyol, 5-10 parts of acrylamide and 15-40 parts of deionized water; the nano alumina is modified by a silane coupling agent, and the concentration of the formaldehyde aqueous solution is 35-40 wt%.
Preferably, the using amount of the silane coupling agent is 0.5-1.5% of the mass of the nano alumina.
Further, the preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding nano aluminum oxide, a silane coupling agent, ethanol and a part of deionized water into a container, stirring for 0.5-1 h, adding polyether polyol, and uniformly stirring to obtain a suspension;
p2, adding formaldehyde and the other part of deionized water into a reaction kettle, adjusting the pH to 8-10 by using alkali liquor, adding melamine, heating to 65-75 ℃, and reacting for 20-30 min; then adding the suspension, heating to 80-90 ℃, and reacting for 0.5-1 h; adding acrylamide and reacting for 30-45 min; and cooling to below 40 ℃ and discharging to obtain the modified melamine formaldehyde resin glue.
Preferably, the alkali liquor is sodium carbonate or sodium bicarbonate water solution with the concentration of 25-40 wt%.
Preferably, the polyether polyol is polyoxypropylene diol or polyoxypropylene triol, and the molecular weight is 1000-3000.
Preferably, in the step S1, the drying temperature is 120-150 ℃ and the drying time is 3-5 min.
Preferably, in the step S2, the drying temperature is 120-150 ℃, and the drying time is 5-8 min.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, polyether polyol and acrylamide are adopted to modify melamine formaldehyde resin, and a flexible chain structure is introduced into a rigid molecular chain, so that the brittleness and the toughness of the melamine formaldehyde resin are improved; meanwhile, acrylamide reacts with formaldehyde, so that the content of free formaldehyde in the glue is reduced, the release amount of formaldehyde in the use process of the spray paper can be effectively reduced, and the spray paper is safer and more environment-friendly.
(2) The invention adopts the nano-alumina modified melamine formaldehyde resin, thereby enhancing the hardness and the wear resistance of the resin; meanwhile, the nano-alumina has less dosage, is uniformly dispersed in the melamine formaldehyde resin, has no cover on the decorative patterns, and has clear, complete, continuous and uniform decorative patterns and high aesthetic degree.
(3) The decorative paper and the wear-resistant paper are combined into one, so that one process is omitted in the floor pressing and pasting process, and the production cost is reduced; the obtained product has the advantages of high surface hardness, strong wear resistance, good flexibility, high definition of decorative patterns and good decorative effect.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
This example provides a spray coated paper prepared by the following method steps:
s1, dipping base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 5min at 130 ℃ to obtain dipped paper;
s2, spraying modified melamine formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 4 parts of nano aluminum oxide, 0.04 part of silane coupling agent KH550, 3 parts of ethanol and 10 parts of deionized water into a container, stirring for 1 hour, adding 15 parts of polyoxypropylene glycol with the molecular weight of 2000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 30 parts of formaldehyde aqueous solution and 10 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 20 parts of melamine, heating to 65 ℃, and reacting for 30min; adding the suspension, heating to 85 ℃, and reacting for 1h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃ and discharging to obtain the modified melamine formaldehyde resin glue.
Example 2
This example provides a spray coated paper prepared by the following method steps:
s1, immersing base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 3min at 140 ℃ to obtain impregnated paper;
s2, spraying modified melamine-formaldehyde resin glue on the surface of the impregnated paper, and then drying for 5min at 150 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 4 parts of nano aluminum oxide, 0.05 part of silane coupling agent KH550, 3 parts of ethanol and 15 parts of deionized water into a container, stirring for 1 hour, adding 12 parts of polyoxypropylene glycol with the molecular weight of 2000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 15 parts of formaldehyde aqueous solution and 15 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 40wt% sodium bicarbonate aqueous solution, adding 28 parts of melamine, heating to 65 ℃, and reacting for 30min; then adding the suspension, heating to 85 ℃, and reacting for 1h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃ and discharging to obtain the modified melamine formaldehyde resin glue.
Example 3
This example provides a spray coated paper prepared by the following method steps:
s1, immersing base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 4min at 130 ℃ to obtain impregnated paper;
s2, spraying modified melamine-formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 130 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 5 parts of nano aluminum oxide, 0.06 part of silane coupling agent KH550, 5 parts of ethanol and 20 parts of deionized water into a container, stirring for 1h, adding 10 parts of polyoxypropylene triol with the molecular weight of 3000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 10 parts of formaldehyde aqueous solution and 20 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 20 parts of melamine, heating to 60 ℃, and reacting for 20min; then adding the suspension, heating to 80 ℃, and reacting for 1h; then 10 parts of acrylamide is added to react for 45min; and cooling to below 40 ℃, and discharging to obtain the modified melamine formaldehyde resin glue.
Example 4
This example provides a spray coated paper prepared by the following method steps:
s1, immersing base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 3min at 135 ℃ to obtain impregnated paper;
s2, spraying modified melamine-formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 3 parts of nano aluminum oxide, 0.02 part of silane coupling agent KH550, 2 parts of ethanol and 10 parts of deionized water into a container, stirring for 0.5h, adding 10 parts of polyoxypropylene glycol with the molecular weight of 1000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 40-80nm;
p2, adding 40 parts of formaldehyde aqueous solution and 5 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using sodium carbonate aqueous solution with the concentration of 25wt%, adding 20 parts of melamine, heating to 65 ℃, and reacting for 30min; adding the suspension, heating to 80 ℃, and reacting for 1h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃, and discharging to obtain the modified melamine formaldehyde resin glue.
Example 5
This example provides a spray coated paper prepared by the following method steps:
s1, dipping base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 5min at 130 ℃ to obtain dipped paper;
s2, spraying modified melamine formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 4 parts of nano aluminum oxide, 0.06 part of silane coupling agent KH550, 3 parts of ethanol and 15 parts of deionized water into a container, stirring for 1 hour, adding 10 parts of polyoxypropylene glycol with the molecular weight of 2000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 30 parts of formaldehyde aqueous solution and 15 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 15 parts of melamine, heating to 65 ℃, and reacting for 30min; then adding the suspension, heating to 90 ℃, and reacting for 0.5h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃ and discharging to obtain the modified melamine formaldehyde resin glue.
Example 6
This example provides a spray paper prepared by the following method steps:
s1, dipping base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 5min at 130 ℃ to obtain dipped paper;
s2, spraying modified melamine formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 5 parts of nano aluminum oxide, 0.05 part of silane coupling agent KH550, 3 parts of ethanol and 20 parts of deionized water into a container, stirring for 1 hour, adding 12 parts of polyoxypropylene glycol with the molecular weight of 2000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 25 parts of formaldehyde aqueous solution and 15 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 12 parts of melamine, heating to 65 ℃, and reacting for 30min; adding the suspension, heating to 85 ℃, and reacting for 1h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃, and discharging to obtain the modified melamine formaldehyde resin glue.
Comparative example 1
This comparative example provides a spray coated paper prepared by the following method steps:
s1, immersing base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 5min at 130 ℃ to obtain impregnated paper;
s2, spraying modified melamine-formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 4 parts of alumina, 0.04 part of silane coupling agent KH550, 3 parts of ethanol and 10 parts of deionized water into a container, stirring for 1h, adding 15 parts of polyoxypropylene glycol with the molecular weight of 2000, and uniformly stirring to obtain a suspension; the average grain diameter of the alumina is 10-50 μm;
p2, adding 30 parts of formaldehyde aqueous solution and 10 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 20 parts of melamine, heating to 65 ℃, and reacting for 30min; adding the suspension, heating to 85 ℃, and reacting for 1h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃ and discharging to obtain the modified melamine formaldehyde resin glue.
Comparative example 2
This comparative example provides a spray coated paper prepared by the following method steps:
s1, immersing base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 5min at 130 ℃ to obtain impregnated paper;
s2, spraying modified melamine-formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 4 parts of nano aluminum oxide, 0.04 part of silane coupling agent KH550, 3 parts of ethanol and 10 parts of deionized water into a container, and stirring for 1 hour to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 30 parts of formaldehyde aqueous solution and 10 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 20 parts of melamine, heating to 65 ℃, and reacting for 30min; then adding the suspension, heating to 85 ℃, and reacting for 1h; adding 8 parts of acrylamide, and reacting for 45min; and cooling to below 40 ℃, and discharging to obtain the modified melamine formaldehyde resin glue.
Comparative example 3
This comparative example provides a spray coated paper prepared by the following method steps:
s1, immersing base paper of decorative paper into urea-formaldehyde resin glue for gum dipping, and then drying for 5min at 130 ℃ to obtain impregnated paper;
s2, spraying modified melamine formaldehyde resin glue on the surface of the impregnated paper, and then drying for 8min at 135 ℃ to obtain the sprayed paper.
The preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding 4 parts of nano aluminum oxide, 0.04 part of silane coupling agent KH550, 3 parts of ethanol and 10 parts of deionized water into a container, stirring for 1 hour, adding 15 parts of polyoxypropylene glycol with the molecular weight of 2000, and uniformly stirring to obtain a suspension; the average grain diameter of the nano alumina is 30-60nm;
p2, adding 30 parts of formaldehyde aqueous solution and 10 parts of deionized water into a reaction kettle, adjusting the pH to 8-10 by using 30wt% sodium bicarbonate aqueous solution, adding 20 parts of melamine, heating to 65 ℃, and reacting for 30min; then adding the suspension, heating to 85 ℃, and reacting for 1h; and cooling to below 40 ℃ and discharging to obtain the modified melamine formaldehyde resin glue.
The spray papers prepared in the examples of the present invention and the comparative examples were tested with reference to national standard GB/T18102-2020 impregnated paper laminated wood flooring, and the test results are shown in Table 1.
Table 1 results of performance testing
As can be seen from Table 1, the spray paper prepared by the invention has the advantages of high surface hardness, strong wear resistance, good flexibility, clear and complete decorative patterns, continuity and uniformity, low formaldehyde emission in the using process, safety and environmental protection.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are included in the scope of the present invention, and the scope of the present invention is subject to the scope of the claims.
Claims (8)
1. The preparation method of the spray paper is characterized by comprising the following steps:
s1, immersing base paper of decorative paper into impregnating glue for gum dipping, and then drying to obtain impregnated paper;
s2, spraying modified melamine-formaldehyde resin glue on the surface of the impregnated paper, and then drying to obtain sprayed paper;
the modified melamine-formaldehyde resin glue is prepared from nano aluminum oxide, ethanol, melamine, a formaldehyde aqueous solution, polyether polyol, acrylamide and deionized water;
the modified melamine formaldehyde resin glue comprises the following raw materials in parts by weight: 3-5 parts of nano aluminum oxide, 2-5 parts of ethanol, 10-20 parts of melamine, 20-40 parts of formaldehyde aqueous solution, 10-15 parts of polyether polyol, 5-10 parts of acrylamide and 15-40 parts of deionized water; the nano alumina is modified by a silane coupling agent, and the concentration of the formaldehyde aqueous solution is 35-40 wt%;
the preparation method of the modified melamine formaldehyde resin glue comprises the following steps:
p1, adding nano aluminum oxide, a silane coupling agent, ethanol and a part of deionized water into a container, stirring for 0.5-1 h, adding polyether polyol, and uniformly stirring to obtain a suspension;
p2, adding formaldehyde and the other part of deionized water into a reaction kettle, adjusting the pH to 8-10 by using alkali liquor, adding melamine, heating to 65-75 ℃, and reacting for 20-30 min; then adding the suspension, heating to 80-90 ℃, and reacting for 0.5-1 h; adding acrylamide and reacting for 30-45 min; and cooling to below 40 ℃, and discharging to obtain the modified melamine formaldehyde resin glue.
2. The method for preparing the spray paper according to claim 1, wherein the impregnating compound is urea formaldehyde resin glue or melamine formaldehyde resin glue.
3. The method for preparing spray coated paper according to claim 1, wherein the nano alumina has a particle size of 10 to 100nm.
4. The method for preparing the spray paper according to claim 1, wherein the amount of the silane coupling agent is 0.5-1.5% by mass of the nano alumina.
5. The method for preparing spray paper according to claim 1, wherein the alkali solution is 25-40 wt% sodium carbonate or sodium bicarbonate aqueous solution.
6. The method for producing spray paper according to claim 1, wherein the polyether polyol is polyoxypropylene diol or polyoxypropylene triol, and the molecular weight is 1000 to 3000.
7. The method for preparing the spray paper according to claim 1, wherein in the step S1, the drying temperature is 120-150 ℃ and the drying time is 3-5 min.
8. The method for preparing spraying paper according to claim 1, wherein in the step S2, the drying temperature is 120-150 ℃ and the drying time is 5-8 min.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6835421B1 (en) * | 1999-01-26 | 2004-12-28 | Kronospan Technical Company Ltd. | Method for impregnating decorative papers |
| CN106368083A (en) * | 2016-08-29 | 2017-02-01 | 苏州市建诚装饰材料有限公司 | High-glossiness spraying impregnation paper and production method thereof |
| CN109468876A (en) * | 2018-10-22 | 2019-03-15 | 天津市盛世德新材料科技有限公司 | Abrasion-proof paper and its manufacturing method |
| CN110670405A (en) * | 2019-08-30 | 2020-01-10 | 江苏星光新材料科技有限公司 | Preparation method of composite decorative paper |
| CN112940601A (en) * | 2019-11-26 | 2021-06-11 | 广州四面体新材料科技有限公司 | Ultraviolet curing coating for enhancing wear resistance and preparation method thereof |
-
2021
- 2021-12-21 CN CN202111569710.2A patent/CN114164712B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6835421B1 (en) * | 1999-01-26 | 2004-12-28 | Kronospan Technical Company Ltd. | Method for impregnating decorative papers |
| CN106368083A (en) * | 2016-08-29 | 2017-02-01 | 苏州市建诚装饰材料有限公司 | High-glossiness spraying impregnation paper and production method thereof |
| CN109468876A (en) * | 2018-10-22 | 2019-03-15 | 天津市盛世德新材料科技有限公司 | Abrasion-proof paper and its manufacturing method |
| CN110670405A (en) * | 2019-08-30 | 2020-01-10 | 江苏星光新材料科技有限公司 | Preparation method of composite decorative paper |
| CN112940601A (en) * | 2019-11-26 | 2021-06-11 | 广州四面体新材料科技有限公司 | Ultraviolet curing coating for enhancing wear resistance and preparation method thereof |
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| CN114164712A (en) | 2022-03-11 |
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