Surface Anti-cracking enhanced modification process and pure solid wood flooring for underfloor heating

Abstract

Disclosed are a surface anti-cracking enhanced modification process and pure solid wood flooring for underfloor heating. The modification process specifically comprises the following steps: coating the surface of flooring with a high-elasticity primer and curing same; coating the surface of the high-elasticity primer with a photocurable resin, and then smoothing the glass fiber cloth on the flooring, so that the inner side of the glass fiber cloth is adhered to the surface of the flooring; after the photocurable resin is adhered to the glass fiber cloth, fully impregnating the glass fiber cloth, removing the redundant photocurable resin on the glass fiber cloth, and curing the photocurable resin on the glass fiber cloth, so that the glass fiber cloth is cured, and then a grid structure is formed on the surface of the high-elasticity primer; and finally applying a coating to the surface of the glass fiber cloth and curing same to obtain the finished flooring. The present invention can improve the cloth smoothing effect on the surface of flooring, and improve the paint film strength, the light aging resistance and the flame retardant property of the flooring.

Description

A surface-reinforced anti-crack finishing process and solid wood underfloor heating flooring Technical Field

[0001] This invention relates to a solid wood underfloor heating floor, and more particularly to a surface anti-cracking and enhanced finishing process and a pure solid wood underfloor heating floor. Background Technology

[0002] With changing user aesthetics and needs, the market demand for fabric-finish flooring products with special surface decoration effects and tactile qualities is increasing. However, because wooden flooring is affected by external environmental factors such as temperature and humidity, causing it to shrink and expand with changes in moisture, if manufacturers directly adhere high-strength fabric materials to the flooring surface to achieve the fabric effect, the fabric material cannot deform along with the wooden flooring. This difference in dimensional changes can lead to problems such as wrinkling, delamination, and even peeling of the paint film on the flooring surface, resulting in permanent damage to the fabric effect. On the other hand, if a material with high toughness and low hardness is used as the fabric layer to reduce the difference in dimensional changes, it can easily cause a serious decrease in the flooring's hardness and strength, greatly reducing its lifespan and failing to meet customers' daily usage needs. Under these limitations, it is currently difficult for manufacturers to achieve a fabric-finish effect on wooden flooring by directly laying fabric materials on the flooring surface.

[0003] To address this, manufacturers currently commonly use surface grooving to achieve a fabric-like effect, as shown in patent 201811484596.1. This involves creating several regular horizontal and vertical grooves on the floor surface, allowing the floor to closely resemble the texture and feel of fabric. However, this method is not only complex and inefficient in production, but the fabric structure created by grooving also struggles to completely replicate the visual and tactile effects of real fabric, thus diminishing the user experience of fabric flooring. Technical issues

[0004] Existing processing methods for fabric-finish flooring suffer from complex manufacturing processes, low production efficiency, and poor surface finish. The purpose of this invention is to provide a solid wood underfloor heating flooring based on a surface crack-resistant enhancement finishing process. This improves the fabric finish of the flooring surface while ensuring the strength of the paint film, structural stability, and service life. Technical solutions

[0005] A surface crack-resistant enhancement process includes the following steps:

[0006] a. Apply a high-elasticity primer to the floor surface and cure it to obtain board A;

[0007] b. Coat the surface of board A with UV-cured resin, and then lay the fully resin-impregnated fiberglass cloth flat on board A, so that the inner side of the fiberglass cloth and the surface of board A are in contact with each other, to obtain board B;

[0008] c. Remove excess UV-cured resin from the fiberglass cloth on the surface of board B, and then cure the UV-cured resin on the fiberglass cloth so that the fiberglass cloth forms a grid structure on the surface of the high-elasticity primer after curing, thus obtaining board C;

[0009] d. Apply coating to the surface of board C and cure it to obtain the finished board.

[0010] In the aforementioned surface crack-resistant enhancement process, in step a, an adhesion primer and a high-hardness primer are first applied sequentially to the surface of the floor, and then a high-elasticity primer is applied to the surface of the high-hardness primer.

[0011] In the aforementioned surface crack-resistant enhancement modification process, step a specifically includes the following steps:

[0012] a1. Apply an adhesion primer to the floor surface at a coating rate of 10-30 g / m² and cure it. Then polish the surface of the adhesion primer to obtain A1 board.

[0013] a2. Apply a high-definition hardness primer to the surface of A1 board at a coating amount of 20-30 g / m² and cure it. Then polish the surface of the high-definition hardness primer to obtain A2 board.

[0014] a3. Apply a high-elasticity primer to the surface of A2 board and cure it. Then polish the surface of the high-elasticity primer to obtain board A.

[0015] In the aforementioned surface crack-resistant enhancement process, the high-elasticity primer in step a3 is applied in two layers sequentially, with each layer having a coating amount of 15-25 g / m². Each layer of high-elasticity primer is cured and polished separately after application.

[0016] In the aforementioned surface crack-resistant enhancement modification process, the coating amount of the photocurable resin in step b is 20-40 g / m².

[0017] In the aforementioned surface crack-resistant enhancement process, in step c, the fiberglass cloth on the surface of board B is squeezed by a rubber scraper to remove excess photocurable resin from the fiberglass cloth.

[0018] In the aforementioned surface crack-resistant enhancement modification process, step d specifically includes the following steps:

[0019] d1. Apply a wear-resistant primer to the surface of board C at a coating rate of 10-30 g / m² and allow it to cure. Then, sand and polish the wear-resistant primer to obtain board D1.

[0020] d2. Apply an anti-abrasion topcoat to the surface of board D1 at a coating amount of 5-10 g / m² and cure it. Then, sand and polish the anti-abrasion topcoat to obtain the finished board.

[0021] Solid wood underfloor heating flooring, which is made using the aforementioned surface crack-resistant and enhanced finishing process.

[0022] The solid wood underfloor heating floor includes a substrate. From bottom to top, the substrate surface is provided with an adhesion primer layer, a high-hardness primer layer, a high-elasticity primer layer, a fiberglass cloth composite layer, a wear-resistant primer layer, and an anti-wear topcoat layer. After being applied, the wear-resistant primer layer and the anti-wear topcoat layer form undulations with the surface of the fiberglass cloth composite layer. The high-elasticity primer layer is used to buffer the fiberglass cloth composite layer through local deformation when the substrate shrinks or expands, so as to avoid damage to the paint film bonding interface between the fiberglass cloth composite layer and the substrate due to excessive size difference. The fiberglass cloth composite layer includes fiberglass cloth flatly attached to the surface of the high-elasticity primer layer, and the fiberglass cloth is wrapped with a light-cured resin layer.

[0023] In the aforementioned solid wood underfloor heating floor, the fiberglass cloth is medium-alkali fiberglass cloth with a thickness of 0.08 to 0.5 mm. Beneficial effects

[0024] Compared with the prior art, the present invention has the following characteristics:

[0025] (1) The present invention uses a high elastic primer set on the inner side of the fiberglass cloth so that when the floor shrinks or expands, the high elastic primer can buffer the expansion and contraction. That is, the inner side of the high elastic primer deforms with the floor, while the outer side of the high elastic primer is restricted by the fiberglass cloth and remains unchanged. Thus, the local deformation of the high elastic primer itself is used to adapt to the structural changes on the inner and outer sides, avoiding the substrate from transmitting the lateral deformation to the fiberglass cloth and causing the fiberglass cloth to wrinkle or delaminate, thereby improving the structural stability and service life of the floor.

[0026] (2) By adhering the fiberglass cloth to the high-elasticity primer after impregnating it with UV-cured resin, and then removing the excess UV-cured resin from the surface of the fiberglass cloth, the connection stability between the fiberglass cloth and the high-elasticity primer can be guaranteed, preventing the fiberglass cloth from falling off the high-elasticity primer and providing a good bonding interface for the adhesion of the wear-resistant primer. On the other hand, it can effectively prevent the UV-cured resin from filling the mesh of the fiberglass cloth and causing damage to its fabric structure, thereby achieving the fabric effect of the fiberglass cloth on the floor surface. After curing, the UV-cured resin can also harden and fix the fiberglass cloth, that is, ensure the overall dimensional stability of the fiberglass cloth and limit the high-elasticity primer on the inside, so that the high-elasticity primer only forms local deformation after being subjected to the deformation force of the substrate, that is, achieves a buffering effect.

[0027] (3) Through the above combination, the present invention can stably lay medium alkali glass fiber cloth on the floor surface, thereby effectively improving the anti-light aging and flame retardant properties of the floor and ensuring the stability of the floor in use;

[0028] (4) By combining the adhesion primer layer, the high-definition hardness primer layer, the fiberglass cloth composite layer, the wear-resistant primer layer and the wear-resistant topcoat layer, the impact resistance, wear resistance and bonding performance between the paint film and the wood can be improved. Under the above combination, the wear resistance of the paint film surface of the present invention reaches 0.063g / 100r, the impact resistance reaches 11.6mm, and the cigarette burn resistance reaches level 2, which ensures the various physical and chemical properties of the floor after the fiberglass cloth is laid.

[0029] With the above-mentioned combination, the present invention can adhere fiberglass cloth to the floor surface to achieve a fabric effect. Compared with the existing grooved fabric floor, it effectively improves the authenticity of the fabric effect, giving it a good fabric feel and visual effect. At the same time, it improves the paint film strength, structural stability and service life of the floor, and reduces the processing difficulty for manufacturers. Attached Figure Description

[0030] Figure 1 is a schematic diagram of the structure of the present invention under normal conditions;

[0031] Figure 2 is a schematic diagram of the structure of the present invention when the substrate is in a state of drying and shrinkage;

[0032] Figure 3 is a surface state diagram of Comparative Example 1 in Experiment 1 after testing;

[0033] Figure 4 is a surface state diagram of Comparative Example 2 in Experiment 1 after testing;

[0034] Figure 5 is a surface state diagram of Comparative Example 1 in Experiment 3 after testing;

[0035] Figure 6 is a surface state diagram of Comparative Example 2 in Experiment 3 after testing;

[0036] Figure 7 is a surface state diagram of Comparative Example 3 in Experiment 3 after testing;

[0037] Figure 8 is a surface state diagram of Comparative Example 1 in Experiment 4 after testing;

[0038] Figure 9 shows the surface condition of Comparative Example 2 in Experiment 4 after testing.

[0039] The labels in the attached diagram are: 1-substrate, 2-adhesion primer layer, 3-high-hardness primer layer, 4-high-elasticity primer layer, 5-fiberglass cloth composite layer, 6-wear-resistant primer layer, 7-wear-resistant topcoat layer, 501-fiberglass cloth, 502-photocurable resin layer. Best Mode for Carrying Out the Invention

[0040] A surface crack-resistant enhancement process includes the following steps:

[0041] a. Apply a high-elasticity primer to the floor surface and cure it. The flexibility of the paint film of the high-elasticity primer is controlled according to the test standard of GB / T1731-2020, and its flexibility diameter is not greater than 1mm. Specifically, the 128804511 type high-elasticity primer of Jiangsu Haitian Technology Co., Ltd. can be used to obtain board A.

[0042] b. Coat the surface of board A with UV-curable resin, then lay the fully resin-impregnated fiberglass cloth flat on board A, so that the inner side of the fiberglass cloth and the surface of board A are in contact with each other. The fiberglass cloth is a conventional medium-alkali fiberglass cloth with a thickness of 0.1mm. The UV-curable resin can be K-3022 type film-forming UV-curable resin adhesive, to obtain board B.

[0043] c. Remove excess UV-cured resin from the fiberglass cloth on the surface of board B, and then cure the UV-cured resin on the fiberglass cloth so that the fiberglass cloth forms the original mesh structure on the surface of the high-elasticity primer after curing. The UV-cured resin adheres to the surface of the fiberglass cloth and the bottom of the mesh after curing, thus forming an integrated structure and providing a bonding interface for the topcoat above. This prevents the topcoat from directly contacting the high-elasticity primer or fiberglass cloth during application, resulting in board C.

[0044] d. Apply coating to the surface of board C and cure it to obtain the finished board.

[0045] Step a specifically includes the following steps:

[0046] a1. First, the floor is dyed and the pores are sealed. Then, an adhesion primer is applied to the floor surface at a coating amount of 20g / m² and cured. Then, the surface of the adhesion primer is polished with a 400-mesh sanding belt to obtain A1 board.

[0047] a2. Apply a high-definition hardness primer to the surface of A1 board at a coating amount of 25g / m² and cure it. Then polish the surface of the high-definition hardness primer with a 400-mesh sanding belt. The high-definition hardness primer can be FG-129200 high-definition hardness paint from Jiangsu Haitian Technology Co., Ltd., to obtain A2 board.

[0048] a3. Apply a high-elasticity primer to the surface of A2 board and cure it. Then polish the surface of the high-elasticity primer with a 400-grit sander belt to obtain board A.

[0049] In step a3, the high-elasticity primer is applied in two layers, with each layer having a coating amount of 20g / m². Each layer of high-elasticity primer is cured separately after application and then polished using a 400-grit sandpaper.

[0050] In step b, the coating amount of the photocurable resin is 30 g / m².

[0051] In step c, the fiberglass cloth on the surface of board B is squeezed by a rubber scraper to remove excess light-cured resin from the fiberglass cloth. The raw material size of the fiberglass cloth is slightly larger than that of the floor. After the fiberglass cloth is cured, the operator cuts off the excess fiberglass cloth around the floor so that the edges of the fiberglass cloth and the floor are flush with each other.

[0052] Step d specifically includes the following steps:

[0053] d1. Apply a wear-resistant primer to the surface of board C at a coating rate of 20 g / m² and allow it to cure. Then, polish the primer with a scouring pad or DuPont bristles to obtain board D1.

[0054] d2. Apply an anti-abrasion topcoat to the surface of board D1 at a coating amount of 10g / m² and cure it. Then, use a scouring pad or DuPont bristles to sand and polish the anti-abrasion topcoat to obtain the finished board.

[0055] It also includes a solid wood underfloor heating floor, which is made using the aforementioned surface crack-resistant and enhanced finishing process.

[0056] The solid wood underfloor heating floor includes a substrate 1. From bottom to top, the surface of the substrate 1 is provided with an adhesion primer layer 2, a high-hardness primer layer 3, a high-elasticity primer layer 4, a fiberglass cloth composite layer 5, a wear-resistant primer layer 6, and an anti-wear topcoat layer 7. After being applied, the wear-resistant primer layer 6 and the anti-wear topcoat layer 7 form undulations with the surface of the fiberglass cloth composite layer 5. The high-elasticity primer layer 4 is used to buffer the fiberglass cloth composite layer 5 through local deformation when the substrate 1 shrinks or expands, so as to avoid damage to the paint film bonding interface between the fiberglass cloth composite layer 5 and the substrate 1 due to excessive size difference. The fiberglass cloth composite layer 5 includes a fiberglass cloth 501 flatly attached to the surface of the high-elasticity primer layer 4, and the fiberglass cloth 501 is wrapped with a light-cured resin layer 502.

[0057] The fiberglass cloth 501 is a medium-alkali fiberglass cloth with a thickness of 0.1 mm.

[0058] The working principle of this invention is as follows: A highly elastic primer layer 4 is disposed between the substrate 1 and the fiberglass composite layer 5. The inner and outer sides of the highly elastic primer layer 4 change according to the dimensions of the substrate 1 and the fiberglass composite layer 5, respectively. When the substrate 1 experiences shrinkage or expansion, the inner side of the highly elastic primer layer 4 expands or contracts along with the substrate 1, while the outer side remains dimensionally constant under the constraint of the fiberglass composite layer 5. This provides a buffering effect, preventing the fiberglass composite layer 5 from being directly affected by the substrate 1 and causing wrinkling or delamination, thus improving the structural stability of the fiberglass composite layer 5 after adhesion. The combined arrangement of the high-hardness primer layer 3, the fiberglass composite layer 5, the wear-resistant primer layer 6, and the wear-resistant topcoat layer 7 improves the impact resistance and wear resistance of the floor surface, thereby meeting the performance requirements of the flooring.

[0059] By first impregnating the fiberglass cloth with UV-cured resin and then laying it, and then removing the excess UV-cured resin from the surface of the fiberglass cloth with a scraper, it is possible to ensure that the UV-cured resin completely coats the surface of the fiberglass cloth, thus providing a bonding interface for the subsequent application of the wear-resistant primer. On the other hand, it is also possible to ensure the unevenness of the cloth surface after the fiberglass cloth and UV-cured resin are bonded, thus avoiding the leveling caused by the UV-cured resin on the fiberglass cloth after coating. Embodiments of the present invention

[0060] The embodiments of the present invention adopt the above-described preferred embodiments. Industrial applicability

[0061] Experimental Example 1: This experiment used two wooden boards of the same size and material as substrates. The two substrates were treated to obtain Comparative Example 1 and Comparative Example 2. In Comparative Example 1, the high-elasticity primer, fiberglass cloth, and UV-cured resin were removed from the substrate surface; the remaining components were treated according to the process described in the examples. Comparative Example 2 was treated entirely according to the process described in the examples. Then, the impact resistance of both comparative examples was tested using the test standards in GB / T18102-2020 "Impregnated Paper Laminate Wood Flooring" (steel ball diameter 42.8 mm, height 1.75 m).

[0062] The test results are shown in Figures 3 and 4. Figure 3 shows the surface condition of Comparative Example 1 after the test. The thickness of the impact mark after the steel ball impact in Comparative Example 1 was 14.4 mm, and numerous obvious cracks appeared in the paint film on the floor surface, indicating that the paint film conventionally placed on the floor surface will show significant cracking problems after being subjected to heavy impact. Figure 4 shows the surface condition of Comparative Example 2 after the test. The thickness of the impact mark after the steel ball impact in Comparative Example 2 was 11.6 mm, and there were no obvious cracks on the floor surface, indicating that the fiberglass cloth can reinforce the paint film on the floor surface after installation, mitigating the deformation and cracking of the paint film after impact.

[0063] Experimental Example 2: This experiment uses the technical requirements in GB / T15036.1-2018 to conduct a wear resistance test on the paint film surface of the floor in this example. The test results show that the paint wear amount in this example is 0.063g / 100r, which meets the wear resistance requirements of the superior grade of solid wood flooring.

[0064] Experimental Example 3: In this experiment, three wooden boards of the same size and material were used as substrates, and the three substrates were processed to obtain Comparative Example 1, Comparative Example 2, and Comparative Example 3. In Comparative Example 1, the high-elasticity primer on the surface of the floor was removed, and the rest was processed according to the process in the embodiment. In Comparative Example 2, only a single layer of high-elasticity primer was coated on the surface of the high-hardness primer, with a coating amount of 20 g / m², and the rest was processed according to the process in the embodiment. Comparative Example 3 was processed entirely according to the process in the embodiment.

[0065] The three comparative examples were then placed together in a 60°C oven to simulate a geothermal environment, and the morphology of the fiberglass cloth on the surfaces of the three comparative examples was observed after 24 hours. The test results are shown in Figures 5-7. Figure 5 shows the surface state of Comparative Example 1. In the figure, the fiberglass cloth on the floor surface formed dense and continuous wrinkles after the test, indicating that the existing method of directly laying the fiberglass cloth on the floor surface will cause the fiberglass cloth to wrinkle or delaminate due to the shrinkage and expansion of the substrate. Figure 6 shows the surface state of Comparative Example 2. In the figure, the fiberglass cloth on the floor surface showed several dot-like or line-like white marks after the test, indicating that the fiberglass cloth also had local wrinkling or delamination in this area, and could not completely overcome the influence of substrate shrinkage and expansion. Figure 7 shows the surface state of Comparative Example 3. As can be seen from this figure, the present invention, through the setting of a high-elasticity primer, can effectively avoid the wrinkling or delamination problem on the surface of the fiberglass cloth, and achieve the stability and service life of the fiberglass cloth after laying.

[0066] Experimental Example 4: Using Comparative Examples 1 and 2 from Experimental Example 1 as samples, both groups of samples underwent 12-hour xenon lamp aging treatment. During the treatment, the lower half of the floor was shielded with an opaque material. The test results are shown in Figures 8 and 9. Figure 8 shows the surface state of Comparative Example 1 after the test. The image shows a clear contrast between the upper and lower parts of Comparative Example 1 after the light aging test, indicating that conventional flooring without medium-alkali fiberglass cloth will discolor after long-term light exposure. Figure 9 shows the surface state of Comparative Example 2 after the test. The image shows that the upper and lower parts of Comparative Example 2 are basically the same color after the light aging test, with no obvious difference in brightness. This demonstrates that the medium-alkali fiberglass cloth applied to the floor surface in this invention can improve the floor's resistance to light aging.

Claims

1. A surface crack-resistant and enhanced modification process, characterized in that, Includes the following steps: a. Apply a high-elasticity primer to the floor surface and cure it to obtain board A; b. Coat the surface of board A with UV-cured resin, and then lay the fully resin-impregnated fiberglass cloth flat on board A, so that the inner side of the fiberglass cloth and the surface of board A are in contact with each other, to obtain board B; c. Remove excess UV-cured resin from the fiberglass cloth on the surface of board B, and then cure the UV-cured resin on the fiberglass cloth so that the fiberglass cloth forms a grid structure on the surface of the high-elasticity primer after curing, thus obtaining board C; d. Apply coating to the surface of board C and cure it to obtain the finished board.

2. The surface crack-resistant enhancement modification process according to claim 1, characterized in that: In step a, an adhesion primer and a high-hardness primer are first applied sequentially to the surface of the floor, and then a high-elasticity primer is applied to the surface of the high-hardness primer.

3. The surface crack-resistant enhancement modification process according to claim 2, characterized in that, Step a specifically includes the following steps: a1. Apply an adhesion primer to the floor surface at a coating rate of 10-30 g / m² and cure it. Then polish the surface of the adhesion primer to obtain A1 board. a2. Apply a high-definition hardness primer to the surface of A1 board at a coating amount of 20-30 g / m² and cure it. Then polish the surface of the high-definition hardness primer to obtain A2 board. a3. Apply a high-elasticity primer to the surface of A2 board and cure it. Then polish the surface of the high-elasticity primer to obtain board A.

4. The surface crack-resistant enhancement modification process according to claim 3, characterized in that: In step a3, the high-elasticity primer is applied in two layers, with each layer having a coating amount of 15-25 g / m². Each layer of high-elasticity primer is cured and polished separately after application.

5. The surface crack-resistant enhancement modification process according to claim 1, characterized in that: In step b, the coating amount of the photocurable resin is 20-40 g / m².

6. The surface crack-resistant enhancement modification process according to claim 1, characterized in that: In step c, the fiberglass cloth on the surface of board B is squeezed by a rubber scraper to remove excess photocurable resin from the fiberglass cloth.

7. The surface crack-resistant enhancement modification process according to claim 1, characterized in that, Step d specifically includes the following steps: d1. Apply a wear-resistant primer to the surface of board C at a coating rate of 10-30 g / m² and allow it to cure. Then, sand and polish the wear-resistant primer to obtain board D1. d2. Apply an anti-abrasion topcoat to the surface of board D1 at a coating amount of 5-10 g / m² and cure it. Then, sand and polish the anti-abrasion topcoat to obtain the finished board.

8. Solid wood underfloor heating flooring, characterized by: This solid wood underfloor heating floor is made using a surface crack-resistant and enhanced finishing process as described in any one of claims 1-7.

9. The solid wood underfloor heating floor according to claim 8, characterized in that: The solid wood floor heating floor includes a substrate (1). The surface of the substrate (1) is provided with an adhesion primer layer (2), a high-hardness primer layer (3), a high-elasticity primer layer (4), a fiberglass cloth composite layer (5), a wear-resistant primer layer (6), and an anti-wear topcoat layer (7) from bottom to top. The wear-resistant primer layer (6) and the anti-wear topcoat layer (7) form undulations with the surface of the fiberglass cloth composite layer (5) after being coated. The high-elasticity primer layer (4) is used to buffer the fiberglass cloth composite layer (5) through local deformation when the substrate (1) shrinks or expands, so as to avoid the damage to the paint film bonding interface between the fiberglass cloth composite layer (5) and the substrate (1) due to excessive size difference. The fiberglass cloth composite layer (5) includes a fiberglass cloth (501) flatly attached to the surface of the high-elasticity primer layer (4). The fiberglass cloth (501) is wrapped with a light-cured resin layer (502).

10. The solid wood underfloor heating floor according to claim 9, characterized in that: The fiberglass cloth (501) is a medium-alkali fiberglass cloth, and the thickness of the fiberglass cloth (501) is 0.08-0.5mm.

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