Flexible sheet floor

Abstract

The utility model discloses a flexible sheet floor which comprises a base layer, a PVC (polyvinyl chloride) decorative material layer, a wear-resistant material layer and a coating layer which are sequentially arranged, the flexible sheet floor further comprises a PET (Polyethylene Terephthalate) balance film layer; the PET balance film layer is arranged between the base layer and the PVC decorative material layer; the PET balance film layer comprises a first bottom layer, a PET film layer and a second bottom layer; the PET film layer is a two-way stretching PET film layer; the first bottom layer is a polyurethane resin material layer containing a silane coupling agent, and the first bottom layer is arranged on the first surface of the PET film layer; the second bottom layer is a polyurethane resin material layer containing a silane coupling agent, and the second bottom layer is arranged on the second surface of the PET film layer. According to the flexible sheet floor, the warping condition of the flexible floor can be effectively controlled due to the fact that the abrasion-resistant layer and the base material layer shrink inconsistently.

Description

Technical Field

[0001] The utility model belongs to the technical field of building boards and relates to a sheet floor, in particular to a flexible sheet floor. Background Art

[0002] With the continuous expansion of the home and public decoration markets, the demand for flexible sheet flooring is increasing. However, during transportation or use, the floor may warp or deform, which poses a huge challenge to floor installation. At the same time, there is a risk of the floor falling off due to poor flatness.

[0003] First of all, the reason for the warping and poor flatness of flexible floors is mainly due to the inconsistent shrinkage of the wear-resistant layer and the base layer. The wear-resistant layer shrinks more and the base layer shrinks less, which leads to warping of the floor during processing or transportation.

[0004] In view of this, there is an urgent need to design a new flexible sheet floor so as to overcome at least part of the above-mentioned defects of the existing flexible sheet floor. Utility Model Content

[0005] The utility model provides a flexible sheet floor, which can effectively control the warping of the flexible floor due to the inconsistent shrinkage of the wear-resistant layer and the base material layer.

[0006] In order to solve the above technical problems, according to one aspect of the utility model, the following technical solution is adopted:

[0007] A flexible sheet floor, comprising a base layer, a PVC decorative material layer, a wear-resistant material layer and a coating layer arranged in sequence;

[0008] The flexible sheet floor further comprises a PET balancing film layer; the PET balancing film layer is arranged between the base layer and the PVC decorative material layer;

[0009] The PET balancing film layer comprises a first bottom layer, a PET film layer, and a second bottom layer; the PET film layer is a biaxially stretched PET film layer;

[0010] The first bottom layer is a polyurethane resin material layer containing a silane coupling agent, and the first bottom layer is arranged on the first surface of the PET film layer to enhance the bonding strength between the PET film layer and the base layer;

[0011] The second bottom layer is a polyurethane resin material layer containing a silane coupling agent. The second bottom layer is arranged on the second surface of the PET film layer to enhance the bonding strength between the PET film layer and the PVC decorative material layer.

[0012] As an implementation mode of the utility model, the base layer includes at least one flexible material layer; the PVC decorative material layer includes a PVC white film; the wear-resistant material layer is a PVC transparent film; and the coating layer is a UV-curable polyurethane coating layer.

[0013] As an implementation mode of the utility model, the PET balancing film layer is formed by coating a polyurethane resin material containing a silane coupling agent on both upper and lower surfaces of the PET film layer and then drying the coating.

[0014] As an implementation mode of the utility model, the base layer, the PET balancing film layer, the PVC decorative material layer and the wear-resistant material layer are formed by hot pressing.

[0015] As an implementation mode of the present utility model, the base layer includes at least one layer of flexible material.

[0016] As an implementation mode of the present utility model, the thickness of the base layer is 0.5-2.0 mm.

[0017] As an implementation mode of the present utility model, the thickness of the PET balancing film layer is 0.01-0.02 mm.

[0018] As an implementation mode of the utility model, the base layer of the PVC decorative material layer is a PVC white film with a thickness of 0.05 to 0.10 mm.

[0019] As an implementation mode of the utility model, the thickness of the wear-resistant material layer is 0.20-0.70 mm; and the light transmittance of the wear-resistant material layer is ≥90%.

[0020] The beneficial effect of the utility model is that the flexible sheet floor provided by the utility model can effectively control the warping of the flexible floor due to the inconsistent shrinkage of the wear-resistant layer and the base material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a flexible sheet floor in one embodiment of the utility model.

[0022] Figure 2 The present invention is a flow chart of a method for preparing a flexible sheet floor in one embodiment of the present invention. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0024] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0025] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar prior art means and some technical features in the embodiments are mutually replaced and are also within the scope of the present invention.

[0026] The term “connection” in the specification includes both direct connection and indirect connection.

[0027] The utility model discloses a flexible sheet floor. Figure 1 This is a schematic diagram of the structure of a flexible sheet floor in one embodiment of the utility model; please refer to Figure 1 The flexible sheet floor comprises a base layer 7, a PVC decorative material layer 3, a wear-resistant material layer 2 and a coating layer 1 which are arranged in sequence; the flexible sheet floor further comprises a PET balancing film layer; the PET balancing film layer is arranged between the base layer 7 and the PVC decorative material layer 3.

[0028] The PET balancing film layer includes a first bottom layer 6, a PET film layer 5, and a second bottom layer 4; the PET film layer 5 is a biaxially stretched PET film layer. The first bottom layer 6 is a polyurethane resin material layer containing a silane coupling agent, and the first bottom layer 6 is arranged on the first surface of the PET film layer 5, and plays a bridging role between the PET film layer 5 and the base layer 7, thereby enhancing the bonding strength between the PET film layer 5 and the base layer 7; the second bottom layer 4 is a polyurethane resin material layer containing a silane coupling agent, and the second bottom layer 4 is arranged on the second surface of the PET film layer 5, and plays a bridging role between the PVC decorative material layer 3 and the PET film layer 5, thereby enhancing the bonding strength between the PET film layer 5 and the PVC decorative material layer 3. The PET balancing film layer can be formed by coating the polyurethane resin material containing a silane coupling agent on the upper and lower surfaces of the PET film layer and then drying it; the thickness of the PET balancing film layer is 0.01 to 0.02 mm.

[0029] In one embodiment of the present invention, the base layer 7 includes at least one flexible material layer; the flexible material base layer is mainly composed of PVC resin, plasticizer, calcium powder, etc., and is formed by mixing and calendering; the thickness of the base layer 7 can be 0.5 to 2.0 mm.

[0030] The base layer of the PVC decorative material layer 3 is a PVC white film with a thickness of 0.05-0.10 mm; the PVC decorative material layer 3 is processed by gravure printing or spray painting, and its main function is to display different patterns and colors of the floor.

[0031] The wear-resistant material layer 2 is a transparent PVC film, and the light transmittance of the wear-resistant material layer is ≥90%; the thickness of the wear-resistant material layer 2 is 0.20-0.70 mm; the main function is to characterize the service life of the floor, the thicker the wear-resistant layer, the longer the service life. The coating layer 1 is a UV curing polyurethane coating layer; the coating can be applied by roller coating.

[0032] In an embodiment of the present invention, the base layer 7, the PET balancing film layer, the PVC decorative material layer 3, and the wear-resistant material layer 2 can be formed by hot pressing.

[0033] The preparation method of the flexible sheet floor of the utility model may include the following steps (such as Figure 2 shown):

[0034] Step S1: Balance membrane preparation step;

[0035] Place the PET double-stretched film on the unwinding rack, perform corona treatment on one side of the PET double-stretched film to ensure that the dyne value is greater than 40dyn / cm, and then use the gravure coating process to coat the water-based polyurethane containing silane coupling agent on the surface of the PET film, and then dry and collect the material; then treat the other side of the PET double-stretched film in the same way to obtain a balanced film.

[0036] Step S2: calendering step;

[0037] The PVC resin, plasticizer, stone powder and other auxiliary raw materials are mixed evenly according to the proportion, then kneaded, and the thickness is determined by a four-roll calender, and then cooled and cut to obtain a flexible base layer.

[0038] Step S3: hot pressing step;

[0039] The film is laid from bottom to top, the flexible base layer, the balance film, the PVC decorative layer, and the wear-resistant layer. The thickness of the flexible base layer can be one or more layers according to the customer's requirements; the wear-resistant layer can be selected from 0.20-0.70mm according to the customer's use occasion. Attach the embossed plate, set a certain temperature, pressure, and time, close the mold and heat press to get the semi-finished product.

[0040] Step S4: health-preserving step;

[0041] The semi-finished product obtained in step 3 is placed in an environment of 18-25°C for more than 24 hours.

[0042] Step S5: coating step;

[0043] Through roller coating, a certain coating amount and UV curing energy are designed to give the product a certain glossiness.

[0044] Step S6: health-preserving step;

[0045] The coated semi-finished product obtained in step 5 is placed in an environment of 18-25°C for curing for more than 24 hours.

[0046] Step S7: punching and slicing step;

[0047] The product after curing in step 5 is sliced ​​into corresponding sizes according to customer requirements, thereby obtaining the final product, the flexible sheet floor.

[0048] In summary, the flexible sheet floor provided by the utility model can effectively control the warping of the flexible floor due to the inconsistent shrinkage of the wear-resistant layer and the base material layer.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The description and application of the utility model here are illustrative, and it is not intended to limit the scope of the utility model to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be embodied in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. The deformation and changes of the embodiments disclosed here are possible, and the replacement of the embodiments and the various equivalent components are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that the utility model can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential features of the utility model. Other deformations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the utility model.

Claims

1. A flexible sheet floor, characterized in that: The flexible sheet floor comprises a base layer, a PVC decorative material layer, a wear-resistant material layer and a coating layer which are arranged in sequence; The flexible sheet floor further comprises a PET balancing film layer; the PET balancing film layer is arranged between the base layer and the PVC decorative material layer; The PET balancing film layer comprises a first bottom layer, a PET film layer, and a second bottom layer; the PET film layer is a biaxially stretched PET film layer; The first bottom layer is a polyurethane resin material layer containing a silane coupling agent, and the first bottom layer is arranged on the first surface of the PET film layer to enhance the bonding strength between the PET film layer and the base layer; The second bottom layer is a polyurethane resin material layer containing a silane coupling agent. The second bottom layer is arranged on the second surface of the PET film layer to enhance the bonding strength between the PET film layer and the PVC decorative material layer.

2. The flexible sheet floor according to claim 1, characterized in that: The base layer includes at least one flexible material layer; the PVC decorative material layer includes a PVC white film; the wear-resistant material layer is a PVC transparent film; and the coating layer is a UV-curable polyurethane coating layer.

3. The flexible sheet floor according to claim 1, characterized in that: The PET balancing film layer is formed by coating a polyurethane resin material containing a silane coupling agent on both the upper and lower surfaces of the PET film layer and then drying the coating.

4. The flexible sheet floor according to claim 1, characterized in that: The base layer, the PET balancing film layer, the PVC decorative material layer and the wear-resistant material layer are formed by hot pressing.

5. The flexible sheet floor according to claim 1, characterized in that: The base layer includes at least one layer of flexible material.

6. The flexible sheet floor according to claim 1, characterized in that: The thickness of the base layer is between 0.5 and 2.0 mm.

7. The flexible sheet floor according to claim 1, characterized in that: The thickness of the PET balance film layer is 0.01-0.02 mm.

8. The flexible sheet floor according to claim 1, characterized in that: The base layer of the PVC decorative material layer is a PVC white film with a thickness of 0.05 to 0.10 mm.

9. The flexible sheet floor according to claim 1, characterized in that: The thickness of the wear-resistant material layer is 0.20-0.70 mm; the light transmittance of the wear-resistant material layer is ≥90%.

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