Rubber-wood finger-jointed core digital printing floor and production process thereof

Abstract

This invention belongs to the technical field of building decoration materials and relates to a digitally printed rubberwood finger-jointed core flooring. It includes a core layer, on the surface of which, from top to bottom, are a coating layer, a printing layer, a primer layer, a top layer, and a first balancing layer. Below the back of the core layer are a second balancing layer and a backing board. The core layer is made of rubberwood finger-jointed material, joined by finger-joints along the length of rubberwood strips and spliced ​​along the width. Stress grooves are provided on the surface of adjacent rubberwood strips away from the finger-joints. The width of the stress grooves is 0.5–0.6 mm, the depth is 1.0–2.0 mm, and the length is between the width of one and two rubberwood strips. The distance between two adjacent stress grooves is not less than 0.2 mm. The thickness of the printing layer is 0.01–0.1 mm. The production process is also disclosed. This invention controls structural stability through structural adjustments, making it less prone to deformation and cracking; the combination of paint coating and digital printing fully utilizes low-grade wood raw materials.

Description

Technical Field

[0001] This invention belongs to the field of building decoration materials technology, and relates to flooring, and more particularly to a rubberwood finger-jointed core digital printing flooring and its production process. Background Technology

[0002] With the development of the building materials industry, timber resources are becoming increasingly scarce. High-grade raw materials for flooring are becoming increasingly rare. The domestic consumer market has a low acceptance of defects such as knots, cracks, and color differences in low-grade timber raw materials. Therefore, the development concept of high-performance low-grade materials is becoming increasingly important, and making high-grade products from low-grade raw materials has become an urgent problem to be solved.

[0003] In existing technologies, the biggest problem encountered when printing on wooden flooring is floor warping. Warping causes unevenness on the floor surface, resulting in unclear printed textures and affecting the pass rate of printed flooring. CN221194087U discloses a three-layer rubberwood core flooring. This structure includes rubberwood finger-jointed material, a first mesh buffer layer on the upper surface of the rubberwood finger-jointed material, a surface layer on the upper surface of the first mesh buffer layer, a second mesh buffer layer on the lower surface of the rubberwood finger-jointed material, and a base plate on the lower surface of the second mesh buffer layer. This technology uses finger-jointed rubberwood as the core board, but it still has a three-layer structure. Although the buffer layer can have a certain effect on preventing cracking, it cannot effectively control the shape of the flooring. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a rubberwood finger-jointed core digital printing floor.

[0005] Technical solution

[0006] A digitally printed rubberwood finger-jointed core floor includes a core layer. From top to bottom, the surface of the core layer comprises a coating layer, a printing layer, a primer layer, a top layer, and a first balancing layer. Below the back of the core layer are a second balancing layer and a backing board. All layers below the top layer are bonded together with adhesive. The core layer is made of finger-jointed rubberwood, joined by finger-joints along the length of rubberwood strips and spliced ​​along the width. Stress grooves are provided on the surfaces of adjacent rubberwood strips away from the finger-joints. The stress grooves are 0.5–0.6 mm wide, 1.0–2.0 mm deep, and between the width of one and two rubberwood strips, with a spacing of not less than 0.2 mm between adjacent stress grooves. The printing layer has a thickness of 0.01–0.1 mm.

[0007] In a preferred embodiment of the present invention, the coating layer has a thickness of 0.01 to 0.1 mm, with the bottom layer being a cured layer of wear-resistant primer and the top layer being a cured layer of topcoat.

[0008] In a preferred embodiment of the present invention, the primer layer is an oil-based white base coat, and the top coat used in the present invention is a low-grade wood veneer, which is covered with an oil-based white base coat.

[0009] In a preferred embodiment of the present invention, the surface layer is a hardwood veneer of 0.45–1.2 mm, and the grain direction is consistent with the grain direction of the core layer and the back panel.

[0010] In a preferred embodiment of the present invention, both the first balancing layer and the second balancing layer are 1-3 mm thick waterproof high-density particleboard with a density of 0.9-1.2 g / cm³. 2 Particleboard, lacking the tensile strength of wood fibers, serves as a buffer layer between the surface, core, and back layers, ensuring the stability of the board shape.

[0011] In a preferred embodiment of the present invention, the rubberwood strip has a moisture content of 6-9%, a length of 8-12 mm, and a finger joint length of 6 cm. The finger joints and spliced ​​parts are glued together. The length of the finger joints in adjacent width directions is not less than 5 cm to ensure the strength of the core layer.

[0012] In a preferred embodiment of the present invention, the distance between the stress groove and both ends of the rubberwood strip along its length is less than 3 cm, and the angle of the stress groove is 180°.

[0013] In a preferred embodiment of the present invention, the back panel is made of softwood with a thickness of 1.2 to 1.5 mm, such as poplar, birch or pine, and the grain direction is consistent with the grain direction of the core layer.

[0014] Another objective of this invention is to disclose the production process of the aforementioned rubberwood finger-jointed core digital printing floor.

[0015] A production process for digitally printed rubberwood finger-jointed core flooring includes: surface layer preparation → balance layer preparation → core layer preparation → backboard preparation → assembly and cold pressing, assembly and hot pressing → curing, splitting, sanding, and tenoning → primer → digital printing → finishing → grading and packaging, wherein:

[0016] A. Preparation of surface layer: Select fast-growing wood, rotary cut it into 0.45-1.2mm veneer, and dry it to achieve a moisture content of 5-8%;

[0017] B. Preparation of the balancing layer: Cut the waterproof high-density particleboard into 1-3mm thin slices using a precision saw, and adjust the moisture content to 6-9%;

[0018] C. Core layer preparation: Rubberwood strips are finger-jointed along the length direction with a finger joint length of 6mm and flat joints along the width direction. The finger joints and spliced ​​parts are glued together with a moisture content of 6-9%. The strips are sawn according to the flooring specifications. Stress grooves are made on the surface of the core layer.

[0019] D. Preparation of backing plate: The backing plate is dried using a vacuum drying kiln or a conventional kiln to a moisture content of 5-6.5%, and then sanded and cut to produce a backing plate of the required thickness and width.

[0020] E. Assembly: Apply adhesive to both sides of the core layer, and place the first and second balancing layers on the top and bottom, respectively. Pre-compression pressure is 11–12 kg / cm². 2 After 15 minutes of pre-pressing, the core layer is coated with adhesive on both sides again and then assembled with the surface layer and back plate under a pressure of 8-9 kg / cm². 2 15 minutes, then low-temperature hot pressing;

[0021] F. Conditioning, splitting, sanding, and tenoning;

[0022] G. Primer Layer: Polish the substrate with a sander using 150# + 180# sander + DuPont bristles → Apply water-based covering white ZU49506, coating amount 18-20 g / m², infrared drying → Apply adhesion primer ZU42067, coating amount 18-22 g / m², UV drying, energy 100-120 J / cm² → Apply hardening low + 20% adhesion primer (FUZ4222 + 20% ZU42067), coating amount 16-18 g / m², UV drying energy 100-120 J / cm². 2 →Opacity white + 20% adhesion primer (ZU49506 + 20% ZU42067), coating weight 16-18 g / m², UV drying, energy 100-120 J / cm² 2 →Reflow putty (FUZ6212), coating amount 25~30g / ㎡, UV drying, energy 100~120j / cm 2 ;

[0023] H. Digital Printing: Utilizing a reciprocating printer with 5 printheads for dot-matrix inkjet printing, a reciprocating speed of 0.1 m / s, an inkjet coating weight of 30–35 g / m², and a printhead-to-floor distance not exceeding 3 mm; UV drying with an energy of 150–180 J / cm³. 2 ;

[0024] I. Coating Layer: Apply abrasion-resistant primer, coverage 14-16 g / m² → apply hardening primer, coverage 15-18 g / m², energy density 120-150 J / cm² 2 Topcoat, application rate 6-8g, energy 120-150j / cm³ 2 This contributes to durability and surface gloss, increasing service life;

[0025] J. Graded packaging.

[0026] In a preferred embodiment of the present invention, in step G, the preparation of the primer layer, the DuPont wire polishing is a steel wire with a diameter of 0.2 mm and a rotation speed of 300 r / min, which creates fine pores in the wood grain to increase the contact with the water-based opaque white and form connection points to increase the adhesion between the opaque white and the substrate; the hardening base + 20% adhesion base and the opaque white + 20% adhesion base ensure the adhesion between the paint coatings.

[0027] In the preferred embodiment of the present invention, in step H, digital printing, tongue and groove flooring can be directly installed and printed, while for large-lock flooring, spacers matching the lock need to be placed between them to ensure that the flooring surface can be fully covered by printing.

[0028] Beneficial effects

[0029] This invention discloses a digitally printed rubberwood finger-jointed core flooring and its production process. By adjusting the structure, the overall structural stability of the flooring is controlled, making it less prone to deformation and cracking. At the same time, the combination of paint finishing and digital printing makes full use of low-grade wood raw materials, which can show high performance effects and effectively maintain the stable green development of the flooring industry. It can also replace the original hardwood surface with a fast-growing wood surface, promoting sustainable development. The physical and chemical properties of the digitally printed products can meet the requirements of the national standard GB / T18103-2013 "Solid Wood Composite Flooring". The product effect is realistic and the appearance is indistinguishable from solid wood flooring. Attached Figure Description

[0030] Figure 1 Schematic diagram of the structure of rubberwood core digitally printed flooring;

[0031] Figure 2 Schematic diagram of the core layer (rubberwood finger-jointed material);

[0032] Figure 3 Schematic diagram of the structure of rubberwood strips and finger joints;

[0033] Figure 4 Schematic diagram of stress groove distribution on the surface of the core layer (rubberwood finger-jointed material);

[0034] The markings are as follows: 1. Coating layer, 2. Printing layer, 3. Primer layer, 4. Top layer, 5. First balancing layer, 6. Core layer, 61. Finger joint teeth, 62. Rubberwood strip, 7. Second balancing layer, 8. Back panel. Detailed Implementation

[0035] The present invention will be described in detail below with reference to embodiments, so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0036] Example 1

[0037] A digitally printed rubberwood finger-jointed core floor includes a core layer 6. From top to bottom, the surface of the core layer 6 comprises a coating layer 1, a printing layer 2, a primer layer 3, a surface layer 4, and a first balancing layer 5. Below the back of the core layer 6 are a second balancing layer 7 and a backing board 8. All layers below the surface layer are bonded together with adhesive. The core layer 6 is made of rubberwood finger-jointed material, joined by finger-joints 61 along the length of rubberwood strips 62 and spliced ​​along the width. Stress grooves are provided on the surfaces of adjacent rubberwood strips 62 away from the finger-joints 61. The stress grooves are 0.5–0.6 mm wide, 1.0–2.0 mm deep, and between the width of one and two rubberwood strips 62. The distance between two adjacent stress grooves is not less than 0.2 mm. The printing layer 2 has a thickness of 0.01–0.1 mm.

[0038] Example 2

[0039] A digitally printed rubberwood finger-jointed core flooring includes a core layer 6. From top to bottom, the surface of the core layer 6 comprises a coating layer 1, a printing layer 2, a primer layer 3, a surface layer 4, and a first balancing layer 5. Below the back of the core layer 6 are a second balancing layer 7 and a backing board 8. All layers below the surface layer are bonded together with adhesive. The core layer 6 is made of finger-jointed rubberwood, formed by finger-jointing rubberwood strips 62 along their length using finger-joint teeth 61, and splicing them along their width. The rubberwood strips 62 have a moisture content of 6-9%, a length of 8-12 mm, and the finger-joint teeth 61 are 6 cm long. The spliced ​​parts are glued together; the length of the finger joint teeth in the adjacent width direction is not less than 5cm; stress grooves are provided on the surfaces of two adjacent rubberwood strips 62 away from the finger joint teeth 61, the distance between the stress grooves and the two ends of the rubberwood strips 62 in the length direction is less than 3cm, and the angle of the stress grooves is 180°; the width of the stress grooves is 0.5-0.6mm, the depth is 1.0-2.0mm, the length is between the width of one rubberwood strip 62 and two rubberwood strips 62, and the distance between two adjacent stress grooves is not less than 0.2mm; the thickness of the printed layer 2 is 0.01-0.1mm.

[0040] Example 3

[0041] A digitally printed rubberwood finger-jointed core flooring includes a core layer 6. From top to bottom, the surface of the core layer 6 comprises a coating layer 1, a printing layer 2, a primer layer 3, a surface layer 4, and a first balancing layer 5. Below the back of the core layer 6 are a second balancing layer 7 and a backing board 8. All layers below the surface layer are bonded together with adhesive. The core layer 6 is made of rubberwood finger-jointed material, formed by finger-jointing rubberwood strips 62 along their length using finger-joint teeth 61, and splicing them along their width. The rubberwood strips 62 have a moisture content of 6-9%, a length of 8-12 mm, and finger-joint teeth 61 are 6 cm long. The finger-jointed and spliced ​​portions are glued together. The length of adjacent finger-joint teeth along their width is not less than 5 cm. m; Stress grooves are provided on the surfaces of two adjacent rubberwood strips 62 away from the finger joint teeth 61. The distance between the stress grooves and the two ends of the rubberwood strips 62 in the length direction is less than 3cm, and the angle of the stress grooves is 180°; The width of the stress grooves is 0.5-0.6mm, the depth is 1.0-2.0mm, and the length is between the width of one rubberwood strip 62 and two rubberwood strips 62. The distance between two adjacent stress grooves is not less than 0.2mm; The thickness of the coating layer 1 is 0.01-0.1mm, the bottom layer is a cured layer of wear-resistant primer, and the top layer is a cured layer of topcoat; The thickness of the printing layer 2 is 0.01-0.1mm; The primer layer 3 is an oil-based white base layer.

[0042] Example 4

[0043] A digitally printed rubberwood finger-jointed core flooring includes a core layer 6. From top to bottom, the surface of the core layer 6 comprises a coating layer 1, a printing layer 2, a primer layer 3, a surface layer 4, and a first balancing layer 5. Below the back of the core layer 6 are a second balancing layer 7 and a backing board 8. All layers below the surface layer are bonded together with adhesive. The core layer 6 is made of rubberwood finger-jointed material, formed by finger-jointing rubberwood strips 62 along their length using finger-joint teeth 61, and splicing them along their width. The rubberwood strips 62 have a moisture content of 6-9%, a length of 8-12 mm, and finger-joint teeth 61 are 6 cm long. The finger-jointed and spliced ​​portions are glued together. The length of adjacent finger-joint teeth along the width is not less than 5 cm. Stress grooves are provided on the surfaces of two adjacent rubberwood strips 62 away from the finger-joint teeth 61. The stress grooves are located at a distance from the rubberwood strips 62. 2. The distance between the two ends along the length direction is less than 3cm, and the stress groove angle is 180°; the width of the stress groove is 0.5-0.6mm, the depth is 1.0-2.0mm, and the length is between the width of one rubberwood strip 62 and two rubberwood strips 62, with the spacing between two adjacent stress grooves not less than 0.2mm; the thickness of the coating layer 1 is 0.01-0.1mm, its bottom layer is a cured layer of wear-resistant primer, and the top layer is a cured layer of topcoat; the thickness of the printing layer 2 is 0.01-0.1mm; the primer layer 3 is an oil-based white base layer; the surface layer 4 is a 0.45-1.2mm thick hardwood veneer, with the grain direction consistent with the grain direction of the core layer 6 and the back panel 8; the first balancing layer 5 and the second balancing layer 7 are both 1-3mm thick waterproof high-density particleboard with a density of 0.9-1.2g / cm³. 2 .

[0044] Example 5

[0045] A digitally printed rubberwood finger-jointed core flooring includes a core layer 6. From top to bottom, the surface of the core layer 6 comprises a coating layer 1, a printing layer 2, a primer layer 3, a surface layer 4, and a first balancing layer 5. Below the back of the core layer 6 are a second balancing layer 7 and a backing board 8. All layers below the surface layer are bonded together with adhesive. The core layer 6 is made of rubberwood finger-jointed material, formed by finger-jointing rubberwood strips 62 along their length using finger-joint teeth 61, and splicing them along their width. The rubberwood strips 62 have a moisture content of 6-9%, a length of 8-12 mm, and finger-joint teeth 61 are 6 cm long. The finger-jointed and spliced ​​portions are glued together. The length of adjacent finger-joint teeth along the width is not less than 5 cm. Stress grooves are provided on the surfaces of two adjacent rubberwood strips 62 away from the finger-joint teeth 61. The stress grooves are located at a distance from the rubberwood strips 62. 2. The distance between the two ends along the length direction is less than 3cm, and the stress groove angle is 180°; the width of the stress groove is 0.5-0.6mm, the depth is 1.0-2.0mm, and the length is between the width of one rubberwood strip 62 and two rubberwood strips 62, with the spacing between two adjacent stress grooves not less than 0.2mm; the thickness of the coating layer 1 is 0.01-0.1mm, its bottom layer is a cured layer of wear-resistant primer, and the top layer is a cured layer of topcoat; the thickness of the printing layer 2 is 0.01-0.1mm; the primer layer 3 is an oil-based white base layer; the surface layer 4 is a 0.45-1.2mm thick hardwood veneer, with the grain direction consistent with the grain direction of the core layer 6 and the back panel 8; the first balancing layer 5 and the second balancing layer 7 are both 1-3mm thick waterproof high-density particleboard with a density of 0.9-1.2g / cm³. 2 The back panel 8 is made of softwood with a thickness of 1.2 to 1.5 mm, such as poplar, birch or pine, and the grain direction is consistent with the grain direction of the core layer.

[0046] Example 6

[0047] A production process for digitally printed rubberwood finger-jointed core flooring includes: surface layer preparation → balance layer preparation → core layer preparation → backboard preparation → assembly and cold pressing, assembly and hot pressing → curing, splitting, sanding, and tenoning → primer → digital printing → finishing → grading and packaging, wherein:

[0048] A. Preparation of surface layer: Select fast-growing wood, rotary cut it into 0.45-1.2mm veneer, and dry it to achieve a moisture content of 5-8%;

[0049] B. Preparation of the balancing layer: Cut the waterproof high-density particleboard into 1-3mm thin slices using a precision saw, and adjust the moisture content to 6-9%;

[0050] C. Core layer preparation: Rubberwood strips are finger-jointed along the length direction with a finger joint length of 6mm and flat joints along the width direction. The finger joints and spliced ​​parts are glued together with a moisture content of 6-9%. The strips are sawn according to the flooring specifications. Stress grooves are made on the surface of the core layer.

[0051] D. Preparation of backing plate: The backing plate is dried using a vacuum drying kiln or a conventional kiln to a moisture content of 5-6.5%, and then sanded and cut to produce a backing plate of the required thickness and width.

[0052] E. Assembly: Apply adhesive to both sides of the core layer, and place the first and second balancing layers on the top and bottom, respectively. Pre-compression pressure is 11–12 kg / cm². 2 After 15 minutes of pre-pressing, the core layer is coated with adhesive on both sides again and then assembled with the surface layer and back plate under a pressure of 8-9 kg / cm². 2 15 minutes, then low-temperature hot pressing;

[0053] F. Conditioning, splitting, sanding, and tenoning;

[0054] G. Primer layer: Polish the substrate with a sander using 150# + 180# sander + DuPont bristles → apply water-based covering white ZU49506, coating amount 18-20 g / m², infrared drying → apply adhesion primer ZU42067, coating amount 18-22 g / m², UV drying, energy 100-120 J / cm² 2 → Coating with hardened low adhesion primer (FUZ4222 + 20% ZU42067), coating weight 16-18 g / m², UV drying energy 100-120 J / cm² 2 →Opacity white + 20% adhesion primer (ZU49506 + 20% ZU42067), coating weight 16-18 g / m², UV drying, energy 100-120 J / cm² 2 →Reflow putty (FUZ6212), coating amount 25~30g / ㎡, UV drying, energy 100~120j / cm 2 ;

[0055] H. Digital Printing: Utilizing a reciprocating printer with 5 printheads for dot-matrix inkjet printing, a reciprocating speed of 0.1 m / s, an inkjet coating weight of 30–35 g / m², and a printhead-to-floor distance not exceeding 3 mm; UV drying with an energy of 150–180 J / cm³. 2 ;

[0056] I. Coating Layer: Apply abrasion-resistant primer, coverage 14-16 g / m² → apply hardening primer, coverage 15-18 g / m², energy density 120-150 J / cm² 2 Topcoat, application rate 6-8g, energy 120-150j / cm³ 2 This contributes to durability and surface gloss, increasing service life;

[0057] J. Graded packaging.

[0058] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rubberwood finger-jointed core digital printing floor, comprising a core layer (6), wherein the surface of the core layer (6) comprises, from top to bottom, a coating layer (1), a printing layer (2), a primer layer (3), a surface layer (4), and a first balancing layer (5); and below the back of the core layer (6) are, in order, a second balancing layer (7) and a backing board (8), characterized in that: The layers below the surface layer are cured together with adhesive; the core layer (6) is made of rubberwood finger-jointed material, which is made by finger-jointing the rubberwood strips (62) along the length direction with finger joints (61) and splicing them along the width direction. Stress grooves are provided on the surfaces of two adjacent rubberwood strips (62) away from the finger joints (61). The width of the stress grooves is 0.5-0.6 mm, the depth is 1.0-2.0 mm, and the length is between the width of one rubberwood strip (62) and two rubberwood strips (62). The distance between two adjacent stress grooves is not less than 0.2 mm; the thickness of the printed layer (2) is 0.01-0.1 mm.

2. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: The coating layer (1) has a thickness of 0.01 to 0.1 mm, with the bottom layer being a cured layer of wear-resistant primer and the top layer being a cured layer of topcoat.

3. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: The primer layer (3) is an oil-based white base coat.

4. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: The surface layer (4) is a hardwood veneer of 0.45 to 1.2 mm, and the grain direction is consistent with the grain direction of the core layer (6) and the back panel (8).

5. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: Both the first balancing layer (5) and the second balancing layer (7) are 1-3mm thick waterproof high-density particleboard with a density of 0.9-1.2g / cm³. 2 .

6. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: The rubberwood strips (62) have a moisture content of 6-9% and a length of 8-12 mm. The finger joints (61) are 6 cm long. The finger joints and spliced ​​parts are glued together. The length of the finger joints in the adjacent width direction is not less than 5 cm to ensure the strength of the core layer (6).

7. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: The distance between the stress groove and both ends of the rubberwood strip (62) along its length is less than 3cm, and the angle of the stress groove is 180°.

8. The rubberwood finger-jointed core digital printing flooring according to claim 1, characterized in that: The back panel (8) is made of softwood with a thickness of 1.2 to 1.5 mm, such as poplar, birch or pine, and the grain direction is consistent with the grain direction of the core layer.

9. A production process for rubberwood finger-jointed core digitally printed flooring according to any one of claims 1-8, comprising: surface layer preparation → balance layer preparation → core layer preparation → backboard preparation → assembly and cold pressing, assembly and hot pressing → curing and aging, splitting, sanding, tenoning → primer → digital printing → finishing → grading and packaging, characterized in that: A. Surface preparation: Select fast-growing timber, rotary cut into 0.45-1.2mm veneers, and dry to a moisture content of 5-8%; B. Preparation of the balancing layer: Cut the waterproof high-density particleboard into 1-3mm thin slices using a precision saw, and adjust the moisture content to 6-9%; C. Core layer preparation: Rubberwood strips are finger-jointed along the length direction with a finger joint length of 6mm and flat joints along the width direction. The finger joints and spliced ​​parts are glued together with a moisture content of 6-9%. The strips are sawn according to the flooring specifications. Stress grooves are made on the surface of the core layer. D. Preparation of backing plate: The backing plate is dried using a vacuum drying kiln or a conventional kiln to a moisture content of 5-6.5%, and then sanded and cut to produce a backing plate of the required thickness and width. E. Assembly: Apply adhesive to both sides of the core layer, and place the first and second balancing layers on the top and bottom, respectively. Pre-compression pressure is 11–12 kg / cm². 2 After 15 minutes of pre-pressing, the core layer is coated with adhesive on both sides again and then assembled with the surface layer and back plate under a pressure of 8-9 kg / cm². 2 15 minutes, then low-temperature hot pressing; F. Conditioning, splitting, sanding, and tenoning; G. Primer layer: Polish the substrate with a sander using 150# + 180# sander + DuPont bristles → apply water-based covering white ZU49506, coating amount 18-20 g / m², infrared drying → apply adhesion primer ZU42067, coating amount 18-22 g / m², UV drying, energy 100-120 J / cm² → apply hardening low + 20% adhesion primer (FUZ4222 + 20% ZU42067). Coating amount 16~18g / ㎡, UV drying energy 100~120j / cm² → Covering white + 20% adhesion primer (ZU49506+20%ZU42067), coating amount 16~18g / ㎡, UV drying, energy 100~120j / cm² → Reflow putty (FUZ6212), coating amount 25~30g / ㎡, UV drying, energy 100~120j / cm²; H. Digital Printing: Utilizing a reciprocating printer with 5 printheads for dot-matrix inkjet printing, a reciprocating speed of 0.1 m / s, an inkjet coating weight of 30–35 g / m², and a printhead-to-floor distance not exceeding 3 mm; UV drying with an energy of 150–180 J / cm³. 2 ; I. Coating layer: Apply wear-resistant primer, coating amount 14-16g / ㎡ → hardening primer, coating amount 15-18g / ㎡, energy 120-150j / cm²; topcoat, coating amount 6-8g, energy 120-150j / cm², which provides durability and surface gloss, and increases service life. J. Sorting and packaging.

10. The manufacturing process of rubberwood finger-jointed core digital printing flooring according to claim 9, characterized in that: In step H, digital printing, tongue and groove flooring and small click flooring can be directly installed and printed. For large click flooring, spacers matching the click mechanism need to be placed between the flooring sections to ensure that the flooring surface can be fully covered by printing.

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