Digital printing facing solid wood composite floor and production process thereof

Abstract

The invention discloses a digital printing facing solid wood composite floor and a production process thereof, and the production process comprises the following steps: step 1, preparing a wood veneer, pre-coating a white primer on the surface of the wood veneer, and carrying out 3D printing on the surface of the white primer to form wood patterns to obtain a to-be-impregnated wood veneer; step 2, impregnating the to-be-impregnated wood veneer with impregnating resin, cleaning the impregnating resin on the surface of the wood veneer, and drying; 3, the surface of the wood pattern is coated with wear-resistant finish paint, and a pre-coated wood veneer is obtained; 4, the pre-coated wood veneers are laid on the solid wood composite base plate, the pre-coated wood veneers are fixed to the solid wood composite base plate through low-temperature pressing and pasting forming, and the solid wood composite floor is obtained; 5, mortises are formed in rabbets of the solid wood composite floor base plate; and 6, primer and finish paint are sequentially applied to the front face of the solid wood composite floor. And the 3D printed wood patterns are subjected to dipping treatment and curing, the strength of the structure of the wood patterns is improved, and the adhesive force of the wood patterns is improved.

Description

Technical Field

[0001] The present application relates to the technical field of ground or floor layers composed of a number of similar components, and in particular to a digitally printed veneer solid wood composite floor and a production process thereof. Background Art

[0002] Natural wood is popular among the public for its elegant texture and natural and healthy characteristics. However, with the shortage of natural wood resources and the rising prices year by year, wood flooring with imitation natural texture has emerged; in addition, with consumers' pursuit of high-quality life in home decoration, the demand for personalized and customized wood flooring will continue to grow. Digital printing technology, with its high precision and high restoration, can meet consumers' personalized needs for wood flooring texture, color and other aspects.

[0003] Since digital printing technology attaches ink to the surface of the veneer substrate through inkjet printing, the ink itself is insufficient in strength after curing, and has limited adhesion to the printing surface of the wooden floor, causing the coating on the digitally printed veneer to easily fall off. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a digitally printed veneer solid wood composite floor and a production process thereof, and the technical solution adopted includes:

[0005] A production process of a digitally printed veneer solid wood composite floor, comprising:

[0006] Step 1, preparing a wood veneer, pre-coating a white primer on the surface of the wood veneer, and then performing 3D printing on the surface of the white primer to form a wood pattern to obtain a wood veneer to be impregnated;

[0007] Step 2, impregnating the wood veneer to be impregnated obtained in step 1 with an impregnating resin, allowing the impregnating resin to penetrate into the wood pattern, cleaning the impregnating resin on the surface of the wood veneer, and performing a drying process;

[0008] Step 3, applying a wear-resistant topcoat on the wood pattern surface to obtain a pre-coated wood veneer;

[0009] Step 4: prepare a solid wood composite substrate, lay the pre-coated wood veneer on the solid wood composite substrate, and fix the pre-coated wood veneer on the solid wood composite substrate by low-temperature pressing and molding to obtain a solid wood composite floor;

[0010] Step 5: Make tongue and groove on the solid wood composite floor substrate;

[0011] Step 6: Apply primer and topcoat to the front of the solid wood composite floor in sequence to obtain the digitally printed veneer solid wood composite floor.

[0012] The technical solution adopted by an embodiment of the present invention to solve its technical problem is: the impregnation resin in step 2 includes: bisphenol A type epoxy resin, toughening agent, active diluent, amine curing agent, titanate, and wear-resistant filler.

[0013] An embodiment of the present invention adopts a technical solution to solve the technical problem: the method of impregnating the digital printing finishing layer in step 2 comprises:

[0014] S1. Place the impregnating resin and the digital printing finishing layer in a vacuum tank, so that the impregnating resin submerges the digital printing finishing layer, and maintain it for 30-60 minutes in an environment with a vacuum degree of 10^-1 to 10^-3Pa, so that the impregnating resin fully penetrates into the pores of the digital printing finishing layer;

[0015] S2. Release the vacuum, take out the digital printing finishing layer, clean the excess resin on the surface of the digital printing finishing layer, let the cleaned digital printing finishing layer stand at room temperature for 12-24 hours, then put the digital printing finishing layer into an oven, heat it at 60-80℃ for 2-4 hours to solidify the impregnated resin.

[0016] An embodiment of the present invention adopts a technical solution to solve the technical problem: the specific method of fixing the pre-coated wood veneer on the solid wood composite substrate by low-temperature pressing in step 4 includes:

[0017] After coating the pre-coated wood veneer and the solid wood composite substrate with polyisocyanate emulsion adhesive respectively, the pre-coated wood veneer and the solid wood composite substrate are assembled and sent to a hot press, hot pressed at a temperature of 75-85°C and a pressure of 10±2kg for 10-12 minutes, and cured for 7-14 days to obtain the solid wood composite floor.

[0018] The technical solution adopted by an embodiment of the present invention to solve its technical problem is: the coating amount of the polyisocyanate emulsion adhesive on the pre-coated wood veneer is 220±10g / ㎡, and the coating amount of the polyisocyanate emulsion adhesive on the solid wood composite substrate is 200±10g / ㎡.

[0019] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: the primer and topcoat applied in sequence to the front side of the solid wood composite floor in step 6 include: a transparent primer, a wear-resistant primer and a topcoat.

[0020] The present application also proposes a digitally printed veneer solid wood composite floor, which is produced using the above-mentioned production process of the digitally printed veneer solid wood composite floor.

[0021] The beneficial effects of the present invention are as follows: by impregnating and curing the 3D printed wood pattern, the strength of the structure of the wood pattern itself is improved, the adhesion of the wood pattern is improved, and thus the adhesion of the digital printed finish is improved. DETAILED DESCRIPTION

[0022] The terms used in the present invention, unless otherwise specified, generally have the meanings commonly understood by those of ordinary skill in the art.

[0023] The present invention is further described in detail below in conjunction with specific examples and with reference to data. It should be understood that this embodiment is only for illustrating the present invention and is not intended to limit the scope of the present invention in any way.

[0024] In the following examples, various processes and methods not described in detail are conventional methods known in the art. The materials, reagents, devices, instruments, equipment, etc. used in the following examples, unless otherwise specified, can be obtained from commercial sources.

[0025] In this application, the production process of the digitally printed veneer solid wood composite flooring includes:

[0026] Step 1, preparing a wood veneer, pre-coating a white primer on the surface of the wood veneer, and then performing 3D printing on the surface of the white primer to form a wood pattern to obtain a wood veneer to be impregnated;

[0027] The wood veneer in step 1 is natural wood veneer, such as birch; in step 1, the wood pattern is layered according to the three-dimensional model, and the wood pattern is layered and printed with ink and cured to form the wood pattern. The ink is oil-based ink, which has high weather resistance and can prevent the wood pattern from fading in the subsequent drying process and low-temperature pressing molding process.

[0028] Step 2, impregnating the wood veneer to be impregnated obtained in step 1 with an impregnating resin, allowing the impregnating resin to penetrate into the wood pattern, cleaning the impregnating resin on the surface of the wood veneer, and performing a drying process;

[0029] The impregnation resin in step 2 comprises: bisphenol A epoxy resin, toughening agent, reactive diluent, amine curing agent, titanate, and wear-resistant filler;

[0030] Specifically, in this embodiment, the impregnating resin includes 100 parts by weight of bisphenol A epoxy resin, 5-10 parts by weight of active diluent, 20-25 parts by weight of amine curing agent, 0.5-2 parts by weight of titanate, 5-15 parts by weight of wear-resistant filler, and 3-5 parts by weight of toughening agent.

[0031] The bisphenol A epoxy resin is a bisphenol A epoxy resin having a viscosity of less than 500 mPa·s, such as epoxy resin E44;

[0032] The amine curing agent is polyetheramine, which prolongs the operation time and reduces bubbles. In this embodiment, the amine curing agent is BASF polyetheramine D230;

[0033] The active diluent is benzyl alcohol, which further reduces the viscosity and improves the permeability of the impregnating resin to the wood pattern;

[0034] The wear-resistant filler is nano-scale silicon dioxide or aluminum oxide powder;

[0035] The toughening agent is liquid rubber;

[0036] The preparation method of the impregnating resin is as follows: bisphenol A epoxy resin, active diluent and titanate are mixed and stirred evenly, wear-resistant filler is added and dispersed, toughening agent and amine curing agent are added and stirred and dispersed continuously to obtain the impregnating resin;

[0037] Methods for impregnating digitally printed surface layers include:

[0038] S1. Place the impregnating resin and the digital printing finishing layer in a vacuum tank, so that the impregnating resin submerges the digital printing finishing layer, and maintain it for 30-60 minutes in an environment with a vacuum degree of 10^-1 to 10^-3Pa, so that the impregnating resin fully penetrates into the pores of the wood pattern;

[0039] S2. Release the vacuum, take out the wood veneer, wipe the excess resin on the surface of the wood veneer with a cloth, let the cleaned wood veneer stand at room temperature for 12-24 hours, then put the digitally printed finishing layer into an oven and heat it at 60-80℃ for 2-4 hours to solidify the impregnated resin.

[0040] Step 3, applying a wear-resistant topcoat on the wood pattern surface, and obtaining a pre-coated wood veneer after curing;

[0041] After impregnation, the wood pattern has a certain structural strength. By applying a wear-resistant topcoat on the surface of the wood pattern, it is beneficial to further improve the wear resistance of the wood pattern. The wear-resistant topcoat applied in step 3 avoids using UV paint, thereby avoiding cracking in the subsequent low-temperature pressing process.

[0042] Step 4: prepare a solid wood composite substrate, lay the pre-coated wood veneer on the solid wood composite substrate, and fix the pre-coated wood veneer on the solid wood composite substrate by low-temperature pressing and molding to obtain a solid wood composite floor;

[0043] The solid wood composite floor substrate in step 3 is obtained by assembling an odd number of veneers in the longitudinal, transverse, longitudinal, transverse, longitudinal, transverse, and longitudinal directions of the grain. Each layer of veneer is bonded by glue and processed by cold pressing and hot pressing to obtain the solid wood composite substrate.

[0044] After coating the pre-coated wood veneer and the solid wood composite substrate with polyisocyanate emulsion adhesive respectively, the pre-coated wood veneer and the solid wood composite substrate are assembled and sent to a hot press, and hot pressed for 10-12 minutes at a temperature of 75-85°C and a pressure of 10±2kg, and cured for 7-14 days to obtain a solid wood composite floor. In this embodiment, the solid wood composite floor is obtained by hot pressing at a temperature of 75-85°C and a pressure of 10 for 11 minutes and curing for 7 days.

[0045] The coating amount of the polyisocyanate emulsion adhesive on the pre-coated wood veneer is 220±10g / ㎡, and the coating amount of the polyisocyanate emulsion adhesive on the solid wood composite substrate is 200±10g / ㎡.

[0046] Step 5: Make tongue and groove on the solid wood composite floor substrate;

[0047] Step 6: Apply primer and topcoat in sequence on the front of the solid wood composite floor to obtain a digitally printed solid wood composite floor. The primer and topcoat applied on the solid wood composite floor include a transparent primer, a wear-resistant primer and a topcoat. By further applying primer and topcoat, the performance of the digitally printed solid wood composite floor is further improved.

[0048] Based on the above content, Example 1 of the present application is proposed, and Example 1 is produced by adopting the production process of the above-mentioned digital printing veneer solid wood composite floor.

[0049] Furthermore, the present application also proposes Comparative Example 1, in which the solid wood composite floor is prepared by the following method:

[0050] Step 1: prepare wood veneer, pre-coat white primer on the surface of the wood veneer, and then perform 3D printing on the surface of the white primer to form a wood pattern;

[0051] Step 2: applying a wear-resistant topcoat on the wood pattern surface to obtain a pre-coated wood veneer;

[0052] Step 3, prepare a solid wood composite substrate, lay a pre-coated wood veneer on the solid wood composite substrate, and fix the pre-coated wood veneer on the solid wood composite substrate by low-temperature pressing to obtain a solid wood composite floor; the specific method is: after coating the pre-coated wood veneer and the solid wood composite substrate with a polyisocyanate emulsion adhesive, the pre-coated wood veneer and the solid wood composite substrate are assembled and sent to a hot press, hot-pressed at a temperature of 75 to 85° C. and a pressure of 10±2 kg for 10-12 minutes, and cured for 7-14 days to obtain a solid wood composite floor;

[0053] The solid wood composite floor substrate in step 3 is obtained by assembling an odd number of veneers in the direction of the grain in the longitudinal, transverse, longitudinal, transverse, longitudinal, transverse, and longitudinal directions, each layer of veneer is bonded by glue, and cold pressing and hot pressing are performed to obtain a substrate layer;

[0054] Step 4: Make tongue and groove on the solid wood composite floor substrate;

[0055] Step 5: Apply primer and topcoat to the front of the solid wood composite floor in sequence to obtain the digitally printed veneer solid wood composite floor.

[0056] Mechanical tests were performed on the digitally printed veneer solid wood composite flooring of Example 1 and Comparative Example 1, and the test items were as follows:

[0057] 1. Impact resistance: In the drop weight test, a 2kg steel ball is used to impact the digital printed wood composite floor at a height of 0.5m to check the surface cracks of the digital printed wood composite floor; no cracks).

[0058] 2. Wear resistance: Taber abrasion test, using a CS10 grinding wheel to rotate 1000 times on the surface of the digitally printed solid wood composite floor, and detecting the mass loss of the digitally printed solid wood composite floor <0.1g);

[0059] The test results are as follows:

[0060] Test items Example Comparative Example Impact resistance No cracking Damage Wear resistance 0.03g 0.2g

[0061] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A production process for digitally printed veneer solid wood composite flooring, characterized in that: include: Step 1, preparing a wood veneer, pre-coating a white primer on the surface of the wood veneer, and then performing 3D printing on the surface of the white primer to form a wood pattern to obtain a wood veneer to be impregnated; Step 2, impregnating the wood veneer to be impregnated obtained in step 1 with an impregnating resin, allowing the impregnating resin to penetrate into the wood pattern, cleaning the impregnating resin on the surface of the wood veneer, and performing a drying process; Step 3, applying a wear-resistant topcoat on the wood pattern surface to obtain a pre-coated wood veneer; Step 4: prepare a solid wood composite substrate, lay the pre-coated wood veneer on the solid wood composite substrate, and fix the pre-coated wood veneer on the solid wood composite substrate by low-temperature pressing and molding to obtain a solid wood composite floor; Step 5: Make tongue and groove on the solid wood composite floor substrate; Step 6: Apply primer and topcoat to the front of the solid wood composite floor in sequence to obtain the digitally printed veneer solid wood composite floor.

2. The production process of digitally printed veneer solid wood composite flooring according to claim 1, characterized in that: The impregnation resin in step 2 includes: bisphenol A epoxy resin, toughening agent, active diluent, amine curing agent, titanate, and wear-resistant filler.

3. The production process of digitally printed veneer solid wood composite flooring according to claim 2, characterized in that: The method for impregnating the digital printing finishing layer in step 2 comprises: S1. Place the impregnating resin and the digital printing finishing layer in a vacuum tank, so that the impregnating resin submerges the digital printing finishing layer, and maintain it for 30-60 minutes in an environment with a vacuum degree of 10^-1 to 10^-3Pa, so that the impregnating resin fully penetrates into the pores of the digital printing finishing layer; S2. Release the vacuum, take out the digital printing finishing layer, clean the excess resin on the surface of the digital printing finishing layer, let the cleaned digital printing finishing layer stand at room temperature for 12-24 hours, then put the digital printing finishing layer into an oven, heat it at 60-80℃ for 2-4 hours to solidify the impregnated resin.

4. The production process of digitally printed veneer solid wood composite flooring according to claim 1, characterized in that: The specific method of fixing the pre-coated wood veneer on the solid wood composite substrate by low-temperature pressing in step 4 includes: After coating the pre-coated wood veneer and the solid wood composite substrate with polyisocyanate emulsion adhesive respectively, the pre-coated wood veneer and the solid wood composite substrate are assembled and sent to a hot press, hot pressed at a temperature of 75-85°C and a pressure of 10±2kg for 10-12 minutes, and cured for 7-14 days to obtain the solid wood composite floor.

5. The production process of digitally printed veneer solid wood composite flooring according to claim 4, characterized in that: The coating amount of the polyisocyanate emulsion adhesive on the pre-coated wood veneer is 220±10g / ㎡, and the coating amount of the polyisocyanate emulsion adhesive on the solid wood composite substrate is 200±10g / ㎡.

6. The production process of digitally printed veneer solid wood composite flooring according to claim 4, characterized in that: The primer and topcoat applied in sequence to the front side of the solid wood composite floor in step 6 include: a transparent primer, a wear-resistant primer and a topcoat.

7. A digitally printed veneer solid wood composite floor, characterized in that: The digitally printed veneer solid wood composite floor is produced by the production process of the digitally printed veneer solid wood composite floor as described in any one of claims 1 to 6.