LVT floor

Abstract

The utility model discloses an LVT floor which comprises a surface layer, a middle material layer, a first additional layer and a second additional layer. The middle material layer is arranged on the lower side of the surface layer and is of a single-layer structure or a multi-layer structure; the first additional layer is arranged between the surface layer and the middle material layer and used for restraining expansion and contraction of the LVT floor; the second additional layer is arranged at the bottom of the middle material layer and used for supporting the LVT floor. The influence of thermal expansion and cold contraction on the LVT floor can be reduced, the shrinkage stability of the LVT floor is improved, meanwhile, the warping stability of the LVT floor is improved, and then the service life of the LVT floor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of floor production, and particularly relates to an LVT floor. Background Art

[0002] At present, most of the existing LVT floors (Luxury Vinyl Tile) are multi-layer structures. From the surface to the ground side, there are a wear-resistant layer, a decorative layer, a middle layer, and a bottom layer. The traditional LVT floors are produced by laminating the wear-resistant layer, the decorative layer, the middle layer, the bottom layer, etc. through a hot pressing process. However, this production method has no anti-shrinkage structure, resulting in problems such as large thermal shrinkage, easy occurrence of rubber bending, large straightness change, and poor stability after floor production. At the same time, the production process is complex and the production efficiency is low.

[0003] Therefore, providing an LVT floor with high stability and improved anti-shrinkage has become a technical problem that urgently needs to be solved in this field. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an LVT floor to solve the problems of large thermal shrinkage, easy occurrence of rubber bending, large straightness change, and poor stability after floor production.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] An LVT floor includes a surface layer, a middle layer, a first additional layer, and a second additional layer; the middle layer is arranged on the lower side of the surface layer, and the middle layer is a single-layer structure or a multi-layer structure; the first additional layer is arranged between the surface layer and the middle layer for restricting the expansion and contraction of the LVT floor; the second additional layer is arranged at the bottom of the middle layer for supporting the LVT floor.

[0007] Further, the first additional layer is an anti-shrinkage layer, and the anti-shrinkage layer is made of a first PET film.

[0008] Further, the thickness of the anti-shrinkage layer is H1, where 12μm ≤ H1 ≤ 30μm.

[0009] Further, the second additional layer is a supporting layer, and the supporting layer is made of a second PET film.

[0010] Further, the thickness of the supporting layer is H2, where 5μm ≤ H2 ≤ 15μm.

[0011] Further, a glass fiber layer is arranged in the middle layer, and the glass fiber layer is glass fiber reinforced PVC.

[0012] Further, adhesives are provided between the surface layer, the middle layer, the first additional layer and the second additional layer to bond the surface layer, the middle layer, the first additional layer and the second additional layer.

[0013] Further, the surface layer includes a UV coating, a wear-resistant layer and a color film layer, and the UV coating, the wear-resistant layer and the color film layer are arranged successively from top to bottom.

[0014] Further, the wear-resistant layer is a PVC transparent sheet, and the thickness of the wear-resistant layer is H3, where 0.1 mm ≤ H3 ≤ 1.0 mm.

[0015] Further, the color film layer is a PVC printed film, and the thickness of the color film layer is H4, where 0.05 mm ≤ H4 ≤ 0.15 mm.

[0016] The beneficial effects of the present utility model are as follows:

[0017] This application provides an LVT floor. By providing a first additional layer between the surface layer and the middle layer, the expansion and contraction of the LVT floor are restricted, thereby reducing the deformation and cracking of the LVT floor caused by temperature changes. A second additional layer is provided at the bottom of the middle layer to support the LVT floor, increasing the stability of the LVT floor and reducing the displacement of the LVT floor caused by temperature fluctuations.

[0018] In summary, through the combined action of the first additional layer and the second additional layer, the influence of thermal expansion and contraction on the LVT floor can be reduced, the shrinkage stability of the LVT floor is improved while the warping stability of the LVT floor is also improved, and thus the service life of the LVT floor is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required to be used in the embodiments of this application will be briefly introduced below.

[0020] Figure 1 It is a schematic structural diagram of an LVT floor shown in an embodiment of this application;

[0021] Figure 2 It is an exploded schematic diagram of an LVT floor shown in an embodiment of this application.

[0022] Reference numerals: 1 - surface layer; 11 - UV coating; 12 - wear-resistant layer; 13 - color film layer; 2 - middle layer; 3 - first additional layer; 4 - second additional layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first" and "second" are only used for differential description and cannot be understood as indicating or implying relative importance.

[0024] The purpose of the present utility model is to provide an LVT floor, which can solve the problems of large thermal shrinkage after floor production, such as easy occurrence of rubber bending, increased straightness, and poor stability.

[0025] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application.

[0026] See Figure 1 , the present application provides an LVT floor, including a surface layer 1, a middle layer 2, a first additional layer 3, and a second additional layer 4.

[0027] The middle layer 2 is arranged on the lower side of the surface layer 1, and the middle layer 2 is a single-layer structure or a multi-layer structure.

[0028] The first additional layer 3 is arranged between the surface layer 1 and the middle layer 2 for restraining the expansion and contraction of the LVT floor; the second additional layer 4 is arranged at the bottom of the middle layer 2 for supporting the LVT floor.

[0029] In the present application, by adding the first additional layer 3 between the surface layer 1 and the middle layer 2 and adding the second additional layer 4 at the bottom of the middle layer 2, through the cooperation of the first additional layer 3 and the second additional layer 4, the surface layer 1 and the middle layer 2 are supported and restrained, reducing the influence of the LVT floor caused by thermal expansion and contraction, improving the shrinkage stability of the LVT floor while improving the warping stability of the LVT floor.

[0030] For the LVT floor provided by the present application, its structure from top to bottom is successively the surface layer 1, the first additional layer 3, the middle layer 2, and the second additional layer 4.

[0031] In one embodiment, the first additional layer 3 is an anti-shrinkage layer, and the anti-shrinkage layer adopts a first PET film (a high-performance polyethylene terephthalate film), which can restrain the expansion and contraction of the LVT floor, thereby reducing its deformation and cracking caused by temperature changes, being able to reduce the influence of the floor caused by thermal expansion and contraction, and improving the stability of the floor.

[0032] The anti - shrinkage layer is made of the first PET, and its adhesion is increased through surface treatment. It has good physical and chemical stability and plays a key protective role for the LVT floor.

[0033] The thickness of the anti - shrinkage layer is H1, where 12μm ≤ H1 ≤ 30μm. In different application scenarios, the thickness H1 of the anti - shrinkage layer needs to be determined according to specific requirements and the characteristics of the LVT floor to ensure its effectiveness and durability. The above - mentioned thickness range of H1 is of great significance for preventing the shrinkage of the LVT floor and ensuring its performance.

[0034] In one embodiment, the second additional layer 4 is a backing layer, and the backing layer is made of a second PET film. It plays a supporting role for the surface layer 1, the first additional layer 3 and the middle layer 2, enhances the stability of the LVT floor, reduces its displacement caused by temperature fluctuations, reduces the influence of thermal expansion and contraction of the LVT floor, and improves both the shrinkage stability and the warping stability of the floor.

[0035] Moreover, the above - mentioned backing layer made of the second PET film can effectively isolate the moisture between the ground and the LVT floor, can be waterproof, and can increase the elasticity of the LVT floor, making the LVT floor more comfortable during use.

[0036] The thickness of the backing layer is H2, where 5μm ≤ H2 ≤ 15μm.

[0037] The second additional layer 4 and the first additional layer 3 are both arranged inside the LVT floor. Acting together, they can significantly reduce the influence of thermal expansion and contraction of the LVT floor, and improve the service life and overall stability of the LVT floor.

[0038] The middle layer 2 is a soft polyvinyl chloride sheet, which has a thickness h, where 1.0mm ≤ h ≤ 4.0mm. It can provide better support and protection, and reduce the wear of the LVT floor caused by daily use.

[0039] In one embodiment, the middle layer 2 is a single - layer structure.

[0040] In another embodiment, the middle layer 2 is a multi - layer structure, and a glass fiber layer is arranged inside the middle layer 2. The glass fiber layer is glass fiber - reinforced PVC (a high - performance pipeline material).

[0041] By setting the above - mentioned middle layer 2, the flexibility and stability of the LVT floor can be improved. And by increasing the thickness of the middle layer 2, the durability and bearing capacity of the LVT floor can be enhanced, playing a role in supporting and stabilizing the LVT floor, and further ensuring that the LVT floor is not easily deformed or damaged during use.

[0042] In one embodiment, adhesives are provided between the surface layer 1, the first additional layer 3, the middle layer 2, and the second additional layer 4. The surface layer 1, the first additional layer 3, the middle layer 2, and the second additional layer 4 are bonded together by the adhesives and then formed through an in-line extrusion lamination process.

[0043] Moreover, the LVT floor is bonded to the ground by means of adhesive adhesion without using a locking structure for connection, enabling the LVT floor to closely fit the ground, ensuring the smoothness of the surface of the LVT floor, and reducing the instability of the LVT floor caused by bending and uneven installation.

[0044] In another embodiment, the surface layer 1, the middle layer 2, the first additional layer 3, and the second additional layer 4 are directly laid on the ground.

[0045] See Figure 2 , the surface layer 1 includes a UV coating 11 (a coating cured by ultraviolet radiation), a wear-resistant layer 12, and a color film layer 13, and the UV coating 11, the wear-resistant layer 12, and the color film layer 13 are arranged in sequence from top to bottom.

[0046] In one embodiment, the UV coating 11 is an ultraviolet-curable coating, and its paint application amount is S, where 20 g ≤ S ≤ 50 g. The paint application amount of the UV coating 11 affects the uniformity and adhesion of the UV coating 11. Therefore, setting it within a reasonable range can ensure the smoothness and stability of the surface of the LVT floor.

[0047] The UV coating 11 can effectively prevent the LVT floor from fading, effectively inhibit the reproduction of bacteria, is pollution-resistant, easy to clean, and more convenient to maintain.

[0048] In one embodiment, the wear-resistant layer 12 is a pvc transparent sheet (a transparent decorative board made of polyvinyl chloride as the base material, through adding additives such as plasticizers and anti-aging agents and extruding and forming), and the thickness of the wear-resistant layer 12 is H3, where 0.1 mm ≤ H3 ≤ 1.0 mm. This thickness range ensures the durability and service life of the LVT floor. Especially in areas with a large flow of people, it can improve the stability of the LVT floor due to its wear resistance.

[0049] The wear-resistant layer 12 is located on the outermost layer of the LVT floor, which can protect the LVT floor from scratches, abrasions, and stains, increase the gloss and waterproof performance of the LVT floor, and is convenient for cleaning.

[0050] In one embodiment, the color film layer 13 is a PVC printing film (a film made of polyvinyl chloride material, with patterns printed on the front of the film by a printing machine, used for packaging and laminating), and provides effective protection for the LVT floor through its characteristics of waterproof, scratch-proof, and wear-resistant.

[0051] The thickness of the color film layer 13 is H4, where 0.05 mm ≤ H4 ≤ 0.15 mm.

[0052] One existing LVT floor currently has a UV coating, a wear-resistant layer, a color film layer, and a middle layer connected in sequence from top to bottom. The paint application amount of the UV coating 11 is set to 22 g, the thickness H3 of the wear-resistant layer 12 is set to 0.5 mm, the thickness H4 of the color film layer 13 is set to 0.07 mm, the middle layer 2 is a single-layer structure with a thickness h of 3 mm, and its test data is shown in Comparative Example 1 in Table 1.

[0053] Another existing LVT floor currently has a UV coating, a wear-resistant layer, a color film layer, and a middle layer connected in sequence from top to bottom. The paint application amount of the UV coating 11 is set to 22 g, the thickness H3 of the wear-resistant layer 12 is set to 0.5 mm, the thickness H4 of the color film layer 13 is set to 0.07 mm, the middle layer 2 is a multi-layer structure with a thickness h of 3 mm, and a glass fiber layer is provided in the middle layer with a thickness of 1 mm. Its test data is shown in Comparative Example 2 in Table 1.

[0054] The internal structure of the LVT floor will be specifically introduced below:

[0055] In one embodiment, the paint application amount of the UV coating 11 is set to 22 g, the thickness H3 of the wear-resistant layer 12 is set to 0.5 mm, the thickness H4 of the color film layer 13 is set to 0.07 mm, the thickness H1 of the anti-shrinkage layer is set to 19 μm, the middle layer 2 is a multi-layer structure with a thickness h of 3 mm, the thickness of the glass fiber layer is set to 1 mm, and the thickness H2 of the bottom layer is set to 9 μm. As shown in Example 1 in Table 1, compared with an LVT floor (Comparative Example 1) in the prior art, the shrinkage rate of one embodiment of the present application is significantly reduced by 23%, and the warpage is reduced by 3.5 mm. Compared with another LVT floor (Comparative Example 2) in the prior art, the shrinkage rate is significantly reduced by 5%, and the warpage is reduced by 0.6 mm. Therefore, the present application reduces the influence of thermal expansion and contraction on the LVT floor, and has a better effect of improving the shrinkage stability and warpage stability of the LVT floor.

[0056] In another embodiment, the paint application amount of the UV coating 11 is set to 22 g, the thickness H3 of the wear-resistant layer 12 is set to 0.5 mm, the thickness H4 of the color film layer 13 is set to 0.07 mm, the thickness H1 of the anti-shrinkage layer is set to 15 μm, the middle layer 2 is a single-layer structure, and its thickness h is 3 mm, and the thickness H2 of the bottom layer is set to 7 μm.

[0057] As shown in Example 2 of Table 1, in another embodiment of the present application, compared with a LVT floor in the prior art (Comparative Example 1), the shrinkage rate is significantly reduced by 22%, and the warpage is reduced by 3.3 mm. Compared with another LVT floor in the prior art (Comparative Example 2), the shrinkage rate is significantly reduced by 4%, and the warpage is reduced by 0.4 mm. Therefore, the present application can better reduce the influence of thermal expansion and contraction on the LVT floor, improve the shrinkage stability of the LVT floor, and at the same time improve the warpage stability of the LVT floor.

[0058] Table 1 Test data of LVT floors in the prior art and LVT floors of the present application

[0059] Test item Comparative example 1 Comparative example 2 Example 1 Example 2 Shrinkage (%) 0.32 0.14 0.09 0.10 Warpage (mm) 4.0 1.1 0.5 0.7

[0060] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0061] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0062] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An LVT floor, characterized in that, Comprising: Surface layer; Intermediate layer, disposed on the lower side of the surface layer, the intermediate layer being a single-layer structure or a multi-layer structure; First additional layer, disposed between the surface layer and the intermediate layer, for restricting the expansion and contraction of the LVT floor; Second additional layer, disposed at the bottom of the intermediate layer, for supporting the LVT floor.

2. The LVT floor according to claim 1, wherein, The first additional layer is a shrinkage-resistant layer, and the shrinkage-resistant layer is made of a first PET film.

3. The LVT floor according to claim 2, characterized in that, The thickness of the shrinkage-resistant layer is H1, where 12 μm ≤ H1 ≤ 30 μm.

4. The LVT floor according to claim 1, wherein, The second additional layer is a bottom support layer, and the bottom support layer is made of a second PET film.

5. The LVT floor according to claim 4, characterized in that, The thickness of the bottom support layer is H2, where 5 μm ≤ H2 ≤ 15 μm.

6. The LVT floor according to claim 1, characterized in that, A glass fiber layer is disposed in the intermediate layer, and the glass fiber layer is glass fiber-reinforced PVC.

7. The LVT floor according to claim 1, wherein, An adhesive is provided between the surface layer, the intermediate layer, the first additional layer, and the second additional layer to bond the surface layer, the intermediate layer, the first additional layer, and the second additional layer.

8. The LVT floor according to claim 1, characterized in that, The surface layer includes a UV coating, a wear-resistant layer, and a color film layer, and the UV coating, the wear-resistant layer, and the color film layer are arranged successively from top to bottom.

9. The LVT floor according to claim 8, wherein, The wear-resistant layer is a PVC transparent sheet, and the thickness of the wear-resistant layer is H3, where 0.1 mm ≤ H3 ≤ 1.0 mm.

10. The LVT floor according to claim 8, characterized in that, The color film layer is a PVC printed film, and the thickness of the color film layer is H4, where 0.05 mm ≤ H4 ≤ 0.15 mm.

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