A decorative paper for wood-based panels and a method for producing the same

Abstract

The present application relates to the technical field of decorative paper, and particularly relates to a kind of artificial board facing decorative paper, including printing base paper and the adhesive film layer covered on the surface of printing base paper, the adhesive film layer is made of impregnation glue solution, the impregnation glue solution includes the following weight parts of raw materials: modified polyurethane emulsion 75-85 parts, epoxy resin 5-9 parts, filler 6-10 parts, nano cellulose 4-7 parts, silane coupling agent 2-3 parts, film forming aid 1.5-2.5 parts, defoaming agent 0.2-0.3 parts, water 20-30 parts.Artificial board facing decorative paper includes printing base paper and the adhesive film layer covered on the surface of printing base paper, the adhesive film layer has good adhesion with printing base paper, artificial board facing decorative paper has good wear resistance, water vapor resistance and cold and hot cycle resistance and other performances, and can reduce the release of formaldehyde, is friendly to environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of decorative paper, in particular to a decorative paper for veneer and a preparation method thereof and a veneer. BACKGROUND

[0002] At present, veneer has been widely used in the field of interior decoration, furniture and the like. Decorative paper is an important veneer material, which protects and beautifies the veneer. However, the existing decorative paper is usually impregnated with urea-formaldehyde resin and melamine-formaldehyde resin and the like aldehyde adhesive, which endows the paper with good hardness, adhesion, acid and alkali resistance and the like. However, the above adhesive will release free formaldehyde during the production and use of the decorative paper, which is easy to volatilize under heat and will cause harm to the health of the workers during hot pressing. At present, with the progress of society and the improvement of people's environmental awareness, the environmental performance of wooden household products has attracted more and more attention. The environmental performance and formaldehyde-free of the decorative paper are of great significance to the environmental performance of the veneer and the health of the human body. Therefore, it is an urgent problem to be solved in the wooden household product and related industries to develop formaldehyde-free decorative paper with good physical properties such as wear resistance, scratch resistance and adhesion. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the present application aims to provide an environmentally friendly veneer decorative paper, which has good wear resistance, water vapor resistance and cold-hot cycle resistance and the like, and can reduce the release of formaldehyde and is friendly to the environment.

[0004] Another object of the present application is to provide a preparation method of the veneer decorative paper, which has high production efficiency, low production cost, convenient operation and is suitable for large-scale production.

[0005] The object of the present application is achieved by the following technical scheme: a veneer decorative paper, comprising a printing base paper and a glue film layer coated on the surface of the printing base paper, the glue film layer is made of impregnated glue solution, the impregnated glue solution comprises the following raw materials in parts by weight: modified polyurethane emulsion 75-85 parts, epoxy resin 5-9 parts, filler 6-10 parts, nano-cellulose 4-7 parts, silane coupling agent 2-3 parts, film-forming aid 1.5-2.5 parts, defoaming agent 0.2-0.3 parts, and water 20-30 parts.

[0006] The object of the present application is achieved by the following technical scheme: a preparation method of a veneer decorative paper, comprising the following steps:

[0007] (1) Take the raw materials for impregnating glue solution, the raw materials include the following components by weight fraction: modified polyurethane emulsion 75-85 parts, epoxy resin 5-9 parts, filler 6-10 parts, nano cellulose 4-7 parts, silane coupling agent 2-3 parts, film forming aid 1.5-2.5 parts, defoaming agent 0.2-0.3 parts, water 20-30 parts;

[0008] (2) Mix the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water uniformly, heat and stir, then add nano cellulose, film forming aid, defoaming agent, stir to obtain impregnating glue solution;

[0009] (3) Put the printing base paper into the impregnating glue solution, fully impregnate, then dry to obtain the decorative paper for artificial board.

[0010] The inventor found that the impregnating glue solution prepared by using the polyurethane emulsion in the prior art and other raw materials such as fillers and film forming aids has problems such as poor wear resistance, water vapor resistance and mechanical properties when applied to the decorative paper, and the adhesion and mechanical properties of the impregnating glue solution prepared by mixing the polyurethane emulsion and the epoxy resin and adding the silane coupling agent are not ideal when applied to the decorative paper. The inventor unexpectedly found that the impregnating glue solution prepared by modifying the polyurethane emulsion and mixing with the epoxy resin, filler, nano cellulose, silane coupling agent and film forming aid can effectively improve the wear resistance, water vapor resistance and surface cold and hot cycle resistance of the decorative paper when applied to the decorative paper, and has strong adhesion with the printing base paper.

[0011] Further, the nano cellulose is CNF-B from Zhejiang Jinjiahao. The epoxy resin is bisphenol A type epoxy resin. The bisphenol A type epoxy resin is bisphenol A type epoxy resin E42.

[0012] Further, the preparation method of the modified polyurethane emulsion includes the following steps:

[0013] S1, take water-based polyurethane emulsion 60-70 parts by weight, add emulsifier 0.1-0.2 parts and initiator 0.1-0.3 parts, stir for 20-40 min to obtain mixed liquid A;

[0014] S2, heat the mixed liquid A to keep 80-90℃, add diallyl phthalate 3-6 parts, acrylic acid 2-4 parts, isobornyl acrylate 2-4 parts while stirring, keep at 75-80℃ for 90-150 min, then add amino modified silicone 4-6 parts, sodium hydroxyethyl cellulose 3-5 parts, stir and keep for 90-150 min to prepare the modified polyurethane emulsion.

[0015] The modified polyurethane emulsion is prepared by using the raw materials and the preparation method, and controlling the process parameters of each step, and is added to the impregnation glue solution, and can be well matched with the raw materials such as epoxy resin, filler, nanocellulose and silane coupling agent, and the impregnation glue layer formed after the impregnation glue solution is cured has good adhesion with the printing base paper, which helps to improve the wear resistance, water vapor resistance, cold and hot cycle resistance and crack resistance of the decorative paper, and prolong the service life of the decorative paper.

[0016] Further, in the step S1, the initiator is one or more of potassium persulfate, sodium persulfate and ammonium persulfate.

[0017] Further, in the step S1, the emulsifier is one or more of sodium dodecyl sulfate, sodium dilauryl phenyl ether disulfate, sodium alkyl benzene sulfonate, sodium dibutyl naphthalene sulfonate and sodium lignin sulfonate.

[0018] Further, the filler is one or more of nano-aluminum oxide, nano-calcium carbonate and nano-silicon dioxide; the particle size of the filler is 50-100nm.

[0019] Further, the film-forming aid is one or both of dipropylene glycol methyl ether and dipropylene glycol butyl ether.

[0020] Further, the silane coupling agent is one or more of vinyl trimethoxysilane, γ-aminopropyl triethoxysilane and γ-glycidyl ether propyl trimethoxysilane.

[0021] Further, the defoaming agent is one or more of silicone-based defoaming agent and polyether-modified silicone oil-based defoaming agent.

[0022] Further, in the step (2), the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water are uniformly mixed, heated to 60-70℃, and stirred for 20-40min, then the nanocellulose, film-forming aid and defoaming agent are added and stirred for 20-40min, to obtain the impregnation glue solution.

[0023] Further, in the step (3), the printing base paper is placed in the impregnation glue solution for complete impregnation, the impregnation amount is 150-200g / m 2 , and dried at a temperature of 100-110℃ to obtain the decorative paper for artificial board.

[0024] The artificial board facing decorative paper of the present application comprises a printing base paper and a glue film layer coated on the surface of the printing base paper, the glue film layer has good adhesion with the printing base paper, the artificial board facing decorative paper has good wear resistance, water vapor resistance and cold and hot cycle resistance, and can reduce the release of formaldehyde and is friendly to the environment. DETAILED DESCRIPTION

[0025] For the convenience of those skilled in the art, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Embodiment 1

[0027] In this embodiment, a preparation method of an artificial board facing decorative paper comprises the following steps:

[0028] (1) The raw materials for preparing the impregnation glue solution comprise the following components in parts by weight: 75-85 parts of modified polyurethane emulsion, 7 parts of epoxy resin, 8 parts of filler, 5 parts of nano-cellulose, 2.5 parts of silane coupling agent, 12 parts of film-forming aid, and 25 parts of water;

[0029] (2) The modified polyurethane emulsion, the epoxy resin, the silane coupling agent, the filler and the water are mixed uniformly, heated and stirred, and then the nano-cellulose, the film-forming aid and the defoaming agent are added and stirred to obtain the impregnation glue solution;

[0030] (3) The printing base paper is placed in the impregnation glue solution for complete impregnation, and then dried to obtain the artificial board facing decorative paper.

[0031] Further, the preparation method of the modified polyurethane emulsion comprises the following steps:

[0032] S1, 65 parts of water-based polyurethane emulsion are taken by weight, 0.15 parts of emulsifier and 0.2 parts of initiator are added, and stirred for 30 min to obtain a mixed solution A;

[0033] S2, the mixed solution A is heated to keep 85℃, 4 parts of diallyl phthalate, 3 parts of acrylic acid and 3 parts of isobornyl acrylate are added while stirring, and kept at 78℃ for 120 min, and then 5 parts of amino-modified silicone and 3.5 parts of sodium hydroxyethyl cellulose are added, stirred and kept for 120 min to obtain the modified polyurethane emulsion.

[0034] Further, in the step S1, the initiator is potassium persulfate, and the emulsifier is sodium dodecyl sulfate.

[0035] Further, the amino-modified organosilicon is KF-8015 amino-modified organosilicon, and the water-based polyurethane emulsion is Covestro water-based polyurethane Bayhydrol A2470.

[0036] Further, the nanocellulose is Zhejiang Jinjiahao CNF-B, and the epoxy resin is bisphenol A type epoxy resin E42.

[0037] Further, the film-forming aid is dipropylene glycol methyl ether, and the silane coupling agent is composed of vinyltrimethoxysilane and γ-glycidoxypropyltrimethoxysilane at a weight ratio of 1:1.

[0038] Further, the defoaming agent is polyether-modified silicone oil MSD-916.

[0039] Further, the filler is composed of nanometer aluminum oxide and nanometer silicon dioxide at a weight ratio of 2:1, and the particle size of the filler is 50-100 nm.

[0040] Further, in the step (2), the modified polyurethane emulsion, the epoxy resin, the silane coupling agent, the filler, and the water are mixed uniformly, heated to 65°C, and stirred for 30 min, then the nanocellulose, the film-forming aid, and the defoaming agent are added and stirred for 30 min to obtain the impregnation glue solution.

[0041] Further, in the step (3), the printing base paper is placed in the impregnation glue solution for complete impregnation, and the impregnation amount is 175 g / m 2 . Drying is performed at a temperature of 105°C to obtain the decorative paper for wood-based panels.

[0042] Example 2

[0043] In this embodiment, a method for preparing a decorative paper for wood-based panels comprises the following steps:

[0044] (1) The raw materials for the impregnation glue solution are weighed, and the raw materials include the following components in parts by weight: modified polyurethane emulsion 85 parts, epoxy resin 6 parts, filler 7 parts, nanocellulose 5 parts, silane coupling agent 2.5 parts, film-forming aid 2.5 parts, and water 24 parts;

[0045] (2) The modified polyurethane emulsion, the epoxy resin, the silane coupling agent, the filler, and the water are mixed uniformly, heated and stirred, then the nanocellulose, the film-forming aid, and the defoaming agent are added and stirred to obtain the impregnation glue solution;

[0046] (3) The printing base paper is placed in the impregnation glue solution for complete impregnation, and then dried to obtain the decorative paper for wood-based panels.

[0047] Further, the preparation method of the modified polyurethane emulsion comprises the following steps:

[0048] S1, by weight parts, take 65 parts of water-based polyurethane emulsion, add 0.15 parts of emulsifier and 0.15 parts of initiator, stir, the stirring time is 30 min, get mixed liquor A;

[0049] S2, mixed liquor A is heated to keep 85℃, add 4 parts of diallyl phthalate, 2.5 parts of acrylic acid, 3.5 parts of isobornyl acrylate while stirring, keep 80℃ for 120 min, then add 5 parts of amino modified silicone, 4 parts of sodium hydroxyethyl cellulose, stir and keep for 120 min, prepare modified polyurethane emulsion.

[0050] Further, in the step (2), the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water are mixed uniformly, heated to 65℃, stirred for 30 min, then the nanocellulose, film forming aid, defoaming agent are added, stirred for 30 min, get the impregnation glue solution.

[0051] Further, in the step (3), the printing base paper is placed in the impregnation glue solution, fully impregnated, the impregnation amount is 172g / m 2 , dry at 105℃, get the decorative paper for wood-based panel.

[0052] The rest of this embodiment is the same as example 1.

[0053] Example 3

[0054] In this example, a preparation method of decorative paper for wood-based panel comprises the following steps:

[0055] (1) take the raw materials of impregnation glue solution, the raw materials include the following components by weight parts: modified polyurethane emulsion 75 parts, epoxy resin 5 parts, filler 6 parts, nanocellulose 4 parts, silane coupling agent 2 parts, film forming aid 1.5 parts, water 20 parts;

[0056] (2) mix the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water uniformly, heat and stir, then add nanocellulose, film forming aid, defoaming agent, stir to get the impregnation glue solution;

[0057] (3) place the printing base paper in the impregnation glue solution, fully impregnate, then dry, get the decorative paper for wood-based panel.

[0058] Further, the preparation method of the modified polyurethane emulsion comprises the following steps:

[0059] S1, take 60 parts by weight of water-based polyurethane emulsion, add 0.1 part of emulsifier and 0.1 part of initiator, stir for 20 min, and obtain mixed liquid A;

[0060] S2, heat the mixed liquid A to keep 80℃, add 3 parts of diallyl phthalate, 2 parts of acrylic acid and 2 parts of isobornyl acrylate while stirring, keep at 75℃ for 150 min, then add 4 parts of amino-modified silicone and 3 parts of sodium hydroxyethyl cellulose, stir and keep for 90 min, and prepare modified polyurethane emulsion.

[0061] Further, in step S1, the initiator is ammonium persulfate, and the emulsifier is sodium alkyl benzene sulfonate.

[0062] Further, the filler is nano-alumina and nano-silica in a weight ratio of 1:1.

[0063] Further, the film-forming aid is dipropylene glycol butyl ether, the silane coupling agent is γ-aminopropyl triethoxysilane, and the defoaming agent is silicone defoaming agent AFE-3168.

[0064] Further, in step (2), the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water are mixed uniformly, heated to 60℃ and stirred for 40 min, then the nano-cellulose, film-forming aid and defoaming agent are added and stirred for 40 min to obtain the impregnation glue solution.

[0065] Further, in step (3), the printing base paper is completely immersed in the impregnation glue solution, the impregnation amount is 168g / m 2 , and dried at 100℃ to obtain the decorative paper for wood-based panels.

[0066] The remaining contents of this embodiment are the same as those of example 1.

[0067] Example 4

[0068] In this embodiment, a method for preparing a decorative paper for wood-based panels comprises the following steps:

[0069] (1) weigh the raw materials of the impregnation glue solution, which include the following components in parts by weight: modified polyurethane emulsion 85 parts, epoxy resin 9 parts, filler 10 parts, nano-cellulose 7 parts, silane coupling agent 3 parts, film-forming aid 2.5 parts, and water 30 parts;

[0070] (2) mix the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water uniformly, heat and stir, then add the nano-cellulose, film-forming aid and defoaming agent, and stir to obtain the impregnation glue solution;

[0071] (3) placing the printing base paper into the impregnation glue solution, performing complete impregnation, and then performing drying to obtain the decorative paper for wood-based panel.

[0072] Further, the preparation method of the modified polyurethane emulsion comprises the following steps:

[0073] S1, taking 70 parts of the water-based polyurethane emulsion by weight, adding 0.2 parts of emulsifier and 0.1 parts of initiator, stirring, and stirring for 20 min to obtain a mixed solution A;

[0074] S2, heating the mixed solution A to keep 90℃, adding 6 parts of diallyl phthalate, 4 parts of acrylic acid, and 4 parts of isobornyl acrylate while stirring, keeping at 80℃ for 90 min, then adding 6 parts of amino-modified silicone and 5 parts of sodium hydroxyethyl cellulose, stirring and keeping for 90 min to prepare the modified polyurethane emulsion.

[0075] Further, in the step S1, the initiator is sodium persulfate. The emulsifier is sodium dodecyl sulfate and sodium dilauryl phenyl ether disulfate in a weight ratio of 1:3. The filler is nano-aluminum oxide and nano-silicon dioxide in a weight ratio of 1:1.

[0076] Further, the film-forming aid is dipropylene glycol butyl ether. The silane coupling agent is γ-glycidyl ether oxypropyl trimethoxysilane.

[0077] Further, in the step (2), the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water are mixed uniformly, heated to 70℃, stirred for 20 min, then nano-cellulose, film-forming aid and defoaming agent are added, stirred for 40 min to obtain the impregnation glue solution.

[0078] Further, in the step (2), the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water are mixed uniformly, heated to 65℃, stirred for 30 min, then nano-cellulose, film-forming aid and defoaming agent are added, stirred for 30 min to obtain the impregnation glue solution.

[0079] Further, in the step (3), the printing base paper is placed in the impregnation glue solution for complete impregnation, and the impregnation amount is 183g / m 2 , drying at 105℃ to obtain the decorative paper for wood-based panel, and drying at 110℃ to obtain the decorative paper for wood-based panel.

[0080] Comparative Example 1

[0081] The difference between the present comparative example and Example 1 is that equal amount of the waterborne polyurethane Bayhydrol A2470 of Covestro is used to replace the modified polyurethane emulsion in Example 1.

[0082] Comparative Example 2

[0083] The difference between the present comparative example and Example 1 is that no nanocellulose is added in the present comparative example.

[0084] Application Example 1

[0085] The decorative papers of Example 1 and Comparative Examples 1-2 are hot-pressed on the surface of the fiberboard under the conditions of a pressure of 4 MPa and a temperature of 165℃ for 2 min, and the printing base paper has a basis weight of 70 g / m 2 The decorative paper is used to prepare a veneered fiberboard, and the density of the veneered fiberboard is 0.7-0.8 g / cm 3 The impregnation amount of the decorative papers of Example 1 and Comparative Examples 1-2 is 175±5 g / m 3 .

[0086] The formaldehyde emission and paper impregnation amount of the veneered fiberboard are tested according to GB / T 28995-2012, and the appearance quality of the veneered fiberboard is observed. It can be seen that there is no damage, stain, gap, etc. on the surface of the veneered fiberboard of Example 1 and Comparative Examples 1-2, and the appearance quality of the product meets the standard of GB / T 28995-2012, and the formaldehyde emission of the veneered fiberboard is 0 mg / L.

[0087] The surface bonding strength, surface wear resistance, surface water vapor resistance, surface scratch resistance (≥1.5 N surface without more than 90% of scratches), surface cracking resistance and surface cold and hot cycle resistance of the veneered fiberboard are determined according to GB / T 15102-2017, and the test results are shown in the following table:

[0088]

[0089] As can be seen from the above table, the veneered fiberboard prepared by using the veneered fiberboard of the present application has excellent surface bonding strength, surface wear resistance, surface water vapor resistance, surface scratch resistance, surface cracking resistance and surface cold and hot cycle resistance, long service life, and can reduce the emission of formaldehyde, is friendly to the environment, and reduces the damage to the human body.

[0090] The above examples are the preferred implementation schemes of the present application, in addition to this, the present application can also be implemented in other ways, without departing from the concept of the present application, any obvious replacement within the protection scope of the present application.

Claims

1. A decorative paper for artificial board facing, characterized by: The invention comprises a printing base paper and a film layer coated on the surface of the printing base paper, wherein the film layer is made of an impregnated adhesive solution, and the impregnated adhesive solution comprises the following raw materials in parts by weight: 75-85 parts of a modified polyurethane emulsion, 5-9 parts of an epoxy resin, 6-10 parts of a filler, 4-7 parts of nanocellulose, 2-3 parts of a silane coupling agent, 1.5-2.5 parts of a film-forming aid, 0.2-0.3 parts of a defoaming agent, and 20-30 parts of water; The preparation method of the modified polyurethane emulsion comprises the following steps: S1, by weight, take 60-70 parts of aqueous polyurethane emulsion, add 0.1-0.2 parts of emulsifier and 0.1-0.3 parts of initiator, and stir for 20-40 minutes to obtain mixed solution A; S2. Heat the mixed solution A to maintain 80-90° C., add 3-6 parts of diallyl phthalate, 2-4 parts of acrylic acid, and 2-4 parts of isobornyl acrylate while stirring, and keep the mixture at 75-80° C. for 90-150 min. Then, add 4-6 parts of amino-modified silicone and 3-5 parts of sodium hydroxyethyl cellulose, stir and keep the mixture warm for 90-150 min to obtain a modified polyurethane emulsion.

2. A method for preparing decorative paper for artificial board facing, characterized in that: The steps include: (1) Weighing the raw materials for the impregnation glue solution, the raw materials include the following components in parts by weight: 75-85 parts of modified polyurethane emulsion, 5-9 parts of epoxy resin, 6-10 parts of filler, 4-7 parts of nanocellulose, 2-3 parts of silane coupling agent, 1.5-2.5 parts of film-forming aid, 0.2-0.3 parts of defoaming agent, and 20-30 parts of water; (2) uniformly mixing a modified polyurethane emulsion, an epoxy resin, a silane coupling agent, a filler, and water, heating and stirring, and then adding nanocellulose, a film-forming aid, and a defoaming agent, and stirring to obtain an impregnation glue solution; (3) placing the printing base paper in the impregnation glue solution, completely impregnating it, and then drying it to obtain the artificial board facing decorative paper; Wherein, the preparation method of the modified polyurethane emulsion comprises the following steps: S1, by weight, take 60-70 parts of aqueous polyurethane emulsion, add 0.1-0.2 parts of emulsifier and 0.1-0.3 parts of initiator, and stir for 20-40 minutes to obtain mixed solution A; S2. Heat the mixed solution A to maintain 80-90° C., add 3-6 parts of diallyl phthalate, 2-4 parts of acrylic acid, and 2-4 parts of isobornyl acrylate while stirring, and keep the mixture at 75-80° C. for 90-150 min. Then, add 4-6 parts of amino-modified silicone and 3-5 parts of sodium hydroxyethyl cellulose, stir and keep the mixture warm for 90-150 min to obtain a modified polyurethane emulsion.

3. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: In step S1, the initiator is one or more of potassium persulfate, sodium persulfate and ammonium persulfate.

4. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: In step S1, the emulsifier is one or more of sodium lauryl sulfate, sodium didodecylphenyl ether disulfonate, sodium alkylbenzene sulfonate, sodium dibutylnaphthalene sulfonate and sodium lignin sulfonate.

5. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: The filler is one or more of nano-alumina, nano-calcium carbonate and nano-silicon dioxide.

6. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: The film-forming aid is one or both of dipropylene glycol methyl ether and dipropylene glycol butyl ether.

7. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: The silane coupling agent is one or more of vinyltrimethoxysilane, γ-aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane.

8. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: In the step (2), the modified polyurethane emulsion, epoxy resin, silane coupling agent, filler and water are mixed uniformly, heated to 60-70° C., stirred for 20-40 minutes, and then nanocellulose, film-forming aid and defoaming agent are added and stirred for 20-40 minutes to obtain the impregnation glue solution.

9. The method for preparing the artificial board facing decorative paper according to claim 2, characterized in that: In the step (3), the printing base paper is placed in the impregnation glue solution for complete impregnation, the impregnation amount is 150-200g / m2, and the base paper is dried at a temperature of 100-110°C to obtain the artificial board facing decorative paper.

Images