High-hardness wear-resistant multi-layer composite ceramic tile-like PVC floor and preparation method thereof

Abstract

The invention discloses a high-hardness wear-resistant multi-layer composite ceramic tile-like PVC floor and a preparation method, and relates to the technical field of building decoration materials, the high-hardness wear-resistant multi-layer composite ceramic tile-like PVC floor comprises a highlight UV paint layer, a wear-resistant UV paint layer, a UV printing layer, a UV white paint layer, an SPC base material layer and a WPC base material balance layer from top to bottom in sequence; the ultra-thin wear-resistant decorative plate has the advantages of high surface hardness, ultra-thin wear resistance, overall light weight and vivid decorative patterns.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building decoration materials, and in particular to a high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor and a preparation method thereof. BACKGROUND

[0002] 1. Traditional PVC wear-resistant layer technology:

[0003] Solution: Use transparent PVC layer (0.3-0.7mm) to cover the printed layer to achieve wear resistance

[0004] Defects:

[0005] ① Insufficient hardness (pencil hardness ≤2H), unable to resist metal sharp object scratches (actual measurement data: ASTM D3363)

[0006] ② To achieve AC4 wear resistance grade, the thickness needs to be ≥0.5mm, resulting in a 35%-50% increase in material cost

[0007] ③ Plasticizer migration leads to gradual stickiness of the surface (JISA5707 aging test: after 500h, the friction coefficient increases by 40%)

[0008] 2. SPC stone plastic substrate technology:

[0009] Solution: Calcium carbonate filled PVC substrate (thickness 4-8mm) to improve dimensional stability

[0010] Defects:

[0011] ① High density (≥2.0g / cm 3 ), reduced paving efficiency (unit area weight exceeds 12kg / m 2 )

[0012] ② Low temperature brittleness (impact strength decreases by 60% at -10℃, GB / T 8804 standard test)

[0013] ③ Large thermal expansion coefficient (0.08%-0.12%), requires a 5mm or more expansion joint

[0014] 3. UV surface treatment technology:

[0015] Existing application: single layer UV paint (thickness 0.05-0.1mm) is used in wood flooring

[0016] Technical bottleneck:

[0017] ① Poor adhesion when directly transplanted to PVC substrate (hundred grid test ≤2 levels, GB / T9286 standard)

[0018] ② Traditional UV paint wear resistance only 800-1000 revolutions (AC2 level), unable to meet the needs of commercial space;

[0019] ③Lack of multi-layer UV synergistic system, hardness and toughness are difficult to balance (star-shaped cracks appear after impact test).

[0020] Therefore, the prior art cannot simultaneously satisfy:

[0021] The synergy of high surface hardness (≥ 6H) and ultra-thin wear resistance (≤ 0.2mm reaches AC4);

[0022] The balance of lightweight substrate (density ≤ 1.5g / cm 3 ) and dimensional stability;

[0023] The interface bonding reliability of UV coating and PVC substrate in industrial production. SUMMARY

[0024] The technical problem to be solved by the present application is to provide a high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor and a preparation method, which solves the above problems.

[0025] Technical scheme

[0026] To solve the above problems, the technical scheme provided by the present application is:

[0027] A high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor, comprising, from top to bottom, a high-gloss UV paint layer, a wear-resistant UV paint layer, a UV printing layer, a UV white paint layer, an SPC substrate layer, and a WPC substrate balancing layer.

[0028] Further, the high-gloss UV paint layer satisfies a pencil hardness of not less than 6H and a Mohs hardness of 4-5.

[0029] Further, the high-gloss UV paint layer has a coating amount of 70-80g / m 2 .

[0030] Further, the wear-resistant UV paint layer has a wear-resistant grade of AC4.

[0031] Further, the wear-resistant UV paint layer has a coating amount of 140-150g / m 2 .

[0032] Further, the SPC substrate layer has a thickness of 1.7-2.5mm and is calendered from PVC and calcium carbonate, with a calcium powder proportion of 40%-60%.

[0033] Further, the WPC substrate balancing layer has a thickness of 4-6mm and is extruded from wood-plastic composite material, with a wood-plastic composite material being a mixture of wood powder and PVC, wherein the wood powder proportion is 55%-65%, and the density of the WPC substrate balancing layer is 1.2-1.5g / cm 3 .

[0034] Further, the total thickness of the high-gloss UV paint layer and the wear-resistant UV paint layer is 0.1-0.2mm.

[0035] Further, the overall thickness of the floor is 5.7-8.5mm.

[0036] A preparation method of a high-hardness wear-resistant multilayer composite imitation ceramic tile PVC floor is also disclosed, which comprises substrate preparation, paint coating, and ultraviolet curing.

[0037] Advantages

[0038] Compared with the prior art, the technical scheme provided by the present application has the following advantages:

[0039] High surface hardness: after UV paint curing, a dense crosslinked network is formed, and 6H hardness can resist metal scratches;

[0040] Super-thin wear-resistant: through the synergy of double-layer UV paint (high-gloss layer impact-resistant + wear-resistant layer friction-resistant), 0.2mm achieves AC4 grade;

[0041] Lightweight: WPC layer replaces part of SPC, density is reduced and size stability is maintained (thermal expansion coefficient ≤0.04%);

[0042] Realistic decorative: UV printing layer resolution ≥300dpi, supporting complex patterns such as marble and antique brick. DETAILED DESCRIPTION

[0043] In order to make the technical scheme of the present application clearer, the present application will be further described in detail below in combination with specific embodiments.

[0044] Embodiment 1

[0045] A high-hardness wear-resistant multilayer composite imitation ceramic tile PVC floor, from top to bottom, comprises a high-gloss UV paint layer, a wear-resistant UV paint layer, a UV printing layer, a UV white paint layer, an SPC substrate layer, and a WPC substrate balancing layer.

[0046] The hardness of the high-gloss UV paint layer is: pencil hardness not less than 6H, Mohs hardness 4-5 grade, and coating amount 70-80g / m 2 ;

[0047] The wear-resistant grade of the wear-resistant UV paint layer is AC4 (EN 13329 standard); the coating amount is 140-150g / m 2 .

[0048] The UV printing layer is used for digital spray printing of imitation ceramic tile texture;

[0049] The UV white paint layer is used to cover the color difference of the substrate and improve the color development of the pattern.

[0050] SPC substrate layer: 1.7-2.5mm thick, calendered from PVC and calcium carbonate, calcium powder accounting for 40%-60%;

[0051] WPC substrate balancing layer: 4-6mm thick, extruded from wood-plastic composite material, the wood-plastic composite material being a mixture of wood powder and PVC, wherein the wood powder accounts for 55%-65%, and the density of the WPC substrate balancing layer is 1.2-1.5g / cm 3 .

[0052] The total thickness of the paint layer composed of high-gloss UV paint layer and wear-resistant UV paint layer is 0.1-0.2mm;

[0053] The overall thickness of the floor is 5.7-8.5mm, and the weight is reduced by 30%-40% compared with pure SPC floor.

[0054] A preparation method of high-hardness wear-resistant multilayer composite imitation ceramic tile PVC floor:

[0055] Substrate preparation:

[0056] SPC layer: 2.5mm thick, PVC+calcium carbonate(50:50), calendering;

[0057] WPC layer: 6mm thick, wood powder / PVC(60:40), extrusion molding.

[0058] Coating paint:

[0059] UV white paint, UV printed pattern, wear-resistant UV paint, high-gloss UV paint are coated in turn;

[0060] The coating amount of UV white paint is 40g / m 2 , the coating amount of wear-resistant UV paint is 150g / m 2 , and the coating amount of high-gloss UV paint is 80g / m 2 ;

[0061] UV curing:

[0062] An energy of 800-1000mJ / cm 2 , wavelength 365nm UV lamp is used for irradiation, so as to realize its curing.

[0063] Performance test:

[0064] The test results of each data are as follows:

[0065] Pencil hardness: 6H, judging standard GB / T 6739-2006);

[0066] Wear resistance: AC4, test method: Taber test, CS10 wheel, weight loss ≤0.05g after 1000 revolutions;

[0067] Weight: 9.8kg / m 2 , while the weight of pure SPC board is 14.2kg / m 2 .

[0068] Ultra-high hardness protection: through the synergy of high-gloss UV paint layer (6H pencil hardness) and wear-resistant UV paint layer (AC4 grade), it can achieve:

[0069] The surface hardness of the board reaches Mohs hardness 4-5 grade, which is higher than the traditional PVC board (no more than 2 grade), and can resist continuous scratching by steel brush (ASTM D968 standard) for 50 times without visible scratches.

[0070] Under the standard of Taber CS10 wheel, weight loss not more than 0.03g, the wear resistance of the board surface is not less than 4000 revolutions, reaching the commercial grade durability standard (EN 13329 AC4 grade).

[0071] The thickness of high-gloss UV paint layer and wear-resistant UV paint layer is ultra-thin, and the total thickness of double UV layers is only 0.1-0.2mm, which means that the wear resistance of traditional 0.5mm PVC layer is achieved, and the material cost is reduced by 38% in cost estimation data.

[0072] Innovative optimization of substrate structure:

[0073] Lightweight design:

[0074] The density of WPC substrate is 1.2-1.5g / cm 3 , so that the weight of 8.5mm thick board is controlled at 9.8kg / m 2 , which is 31% lighter than pure SPC substrate

[0075] According to GB / T 23331 energy management system, the weight reduction of the substrate can reduce the transportation energy consumption by 22%.

[0076] Stability guarantee:

[0077] Under the test of ASTM D2287 test, the thermal expansion coefficient of the board is not more than 0.04% / ℃, which is 55% lower than that of traditional SPC.

[0078] Under the standard of GB / T 1843, the low temperature impact strength of the board at-20℃ is not less than 6kJ / m 2 .

[0079] Comprehensive economic benefit improvement:

[0080] Production efficiency is significantly improved: UV curing speed is 15-20 m / min, while the traditional PVC calendering process is not more than 8 m / min.

[0081] Service life is significantly improved: The accelerated aging test of ISO 4892-2 standard shows that the estimated commercial service life of the plate is not less than 15 years.

[0082] Environmental indicators:

[0083] Zero plasticizer migration can be achieved, and the data is derived from SGS test report No. SH2025-0856.

[0084] VOC emission is not more than 0.05 mg / m 3 (GB / T 29899 standard).

[0085] Decorative effect upgrade:

[0086] UV printing layer resolution is 300 dpi, and color difference ΔE is not more than 1.5 (CIE LAB standard).

[0087] Support complex patterns such as marble and antique bricks, and support 3D relief effect, surface roughness Ra 0.8-2.0 μm, which can be adjusted.

[0088] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A high-hardness wear-resistant multilayer composite imitation porcelain tile PVC floor, characterized in that, The high-gloss UV paint layer, the wear-resistant UV paint layer, the UV printing layer, the UV white paint layer, the SPC substrate layer, and the WPC substrate balancing layer are sequentially arranged from top to bottom.

2. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 1, characterized in that, The high-gloss UV paint layer satisfies a pencil hardness of no less than 6H and a Mohs hardness of 4-5.

3. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 2, characterized in that, The high-gloss UV paint layer has a coating amount of 70-80 g / m².

4. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 1, characterized in that, The wear-resistant UV paint layer has a wear-resistant grade of AC4.

5. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 1, characterized in that, The wear-resistant UV paint layer has a coating amount of 140-150 g / m².

6. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 1, characterized in that, The SPC substrate layer has a thickness of 1.7-2.5 mm and is calendered from PVC and calcium carbonate, and the calcium powder accounts for 40%-60%.

7. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 1, characterized in that, The WPC substrate balancing layer has a thickness of 4-6 mm and is extruded from wood-plastic composite material, and the wood-plastic composite material is a mixture of wood powder and PVC, wherein the wood powder accounts for 55%-65%, and the density of the WPC substrate balancing layer is 1.2-1.5 g / cm³.

8. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 1, characterized in that, The total thickness of the paint layers formed by the high-gloss UV paint layer and the wear-resistant UV paint layer is 0.1-0.2 mm.

9. The high-hardness wear-resistant multi-layer composite imitation porcelain tile PVC floor according to claim 8, characterized in that, The overall thickness of the floor is 5.7-8.5 mm.

10. A preparation method for manufacturing the high-hardness wear-resistant multi-layer composite imitation ceramic tile PVC floor according to any one of claims 1-9, characterized in that, The substrate is prepared, the paint is coated, and ultraviolet curing is performed.