Polyester cloth composite LVT floor and preparation method

Abstract

According to the polyester cloth composite LVT floor and the preparation method, the polyester cloth composite LVT floor comprises a surface layer and a base material layer, the surface layer is composed of a wear-resistant layer and a color film layer, the base material layer is composed of an LVT backing material layer and an LVT middle material layer, and a polyester cloth layer treated through paste resin is arranged on the side, away from the surface layer, of the base material layer. The treated polyester cloth is attached to the back face of the LVT floor, the requirement for the ground and glue in the construction process can be met, the physical performance of the floor is improved, the requirement for the environment temperature is lowered, meanwhile, the stability of the polyester cloth can be used for balancing the influence of a wear-resisting layer on warping and shrinkage of the LVT, and the service life of the LVT floor is prolonged. The ultrahigh stability of the polyester cloth is utilized, the requirement of the LVT backing material formula is lowered, the product cost is further lowered, and the production efficiency is further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of floors, and particularly relates to a polyester cloth composite LVT floor and a preparation method thereof. Background Art

[0002] With the gradual popularization of LVT floors in China, the requirements for LVT floor paving are relatively high, and the environmental temperature during LVT paving is also required to be relatively high. In the prior art, LVT is generally directly glued and bonded to the ground, which has relatively high requirements for the ground and the glue. Specific glues need to be used in specific regions, and the physical properties of the floor itself have a limited temperature adaptability. When ordinary LVT is paved, it is required to be cured for 24 hours in an environment with a room temperature of about 23°C before paving, and the construction temperature is also required to be about 23°C during construction. In addition, after the existing LVT floor structure is paved, warping and shrinkage phenomena are likely to occur during use, affecting the use effect and service life of the floor. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the purpose of the design of the present invention is to provide a polyester cloth composite LVT floor and a preparation method thereof, which are specifically realized through the following technical solutions:

[0004] A polyester cloth composite LVT floor, comprising a surface layer and a base material layer. The surface layer is composed of a wear-resistant layer and a color film layer, the base material layer is composed of an LVT bottom material layer and an LVT middle material layer, and a polyester cloth layer treated with sizing resin is provided on the side of the base material layer away from the surface layer.

[0005] Preferably, the polyester cloth layer is a polyester non-woven fabric layer with a thickness of 0.2 - 2.0 mm.

[0006] Preferably, the thickness of the wear-resistant layer is 0.1 - 1.0 mm, the thickness of the color film layer is 0.05 - 0.10 mm, and the thickness of the base material layer is 1.8 - 4.8 mm.

[0007] A preparation method of a polyester cloth composite LVT floor, comprising the following steps:

[0008] 1) Sizing the polyester non-woven fabric. Adjust the sizing resin to a viscous state, stir evenly, then add the sizing resin evenly to the material tank, start the sizing roller, pass the polyester cloth through the upper surface of the sizing roller, and press down the upper and lower rubber wheels to perform sizing on the polyester non-woven fabric.

[0009] 2) Press the polyester cloth with the sizing resin on it by a needle plate, enter the oven drying channel for drying and shaping, after coming out of the drying channel, cool it by air cooling, and then cut it to the required specifications by a cutting machine for standby.

[0010] 3) Production of LVT layer: The raw materials of the LVT layer are stirred evenly by an automatic mixing system and then transferred to an internal mixer for preliminary plasticization. After internal mixing, they are fully plasticized on an open mixer and then calendered on 4 rollers. After cooling and shaping on a cooling roller, they are cut into the required size according to the needs, respectively, to obtain LVT base material and LVT intermediate material, which are set aside;

[0011] 4) Put the wear-resistant layer base material and the color film layer base material into the corresponding extruder for plasticization and extrusion, and the extruder temperature is 145-170℃;

[0012] 5) Place canvas, isolation film, polyester cloth layer, LVT base material layer, LVT middle material layer, color film layer, wear-resistant layer, isolation film, and embossed plate in the press tray in order from bottom to top for hot pressing. After the hot pressing is completed, turn to cold pressing to cool down and shape. After the cold pressing is completed, the semi-finished product is obtained.

[0013] 6) The surface of the semi-finished product obtained in step 5) is coated with a UV coating layer by roller coating, and is cured in a light drying tunnel, and then tempered with cold and hot water to be re-shaped to obtain a finished product.

[0014] Preferably, in step 2), the drying speed is 20-30 meters per minute, the drying temperature is 80° C., and the temperature is cooled to below 40° C.

[0015] Preferably, in step 3), the mixing time is 3-5 min, the mixing temperature is 170-190° C., and the four-roll temperature is 135-155° C.

[0016] Preferably, in step 5), the hot pressing temperature is 130-150° C., the hot pressing pressure is 3-7 MPA, and the hot pressing time is 25-35 min; the cold pressing temperature is 25-35° C., the cold pressing pressure is 7-13 MPA, and the cold pressing time is 30-40 minutes.

[0017] Preferably, in step 6), the coating amount of the UV coating is 6-22 g / m2.

[0018] The present invention adheres the treated polyester cloth to the back of the LVT floor, which can solve the requirements for the ground and glue during construction, improve the physical properties of the floor itself, and reduce the requirements for ambient temperature. At the same time, the stability of the polyester cloth can be used to balance the influence of the wear-resistant layer on the warping and shrinkage of the LVT. The ultra-high stability of the polyester cloth is used to reduce the requirements for the LVT base material formula, further reducing product costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the layered structure of the present invention;

[0020] In the figure, 1 - surface layer, 101 - wear-resistant layer, 102 - color film layer, 2 - base material layer, 201 - LVT intermediate layer, 202 - LVT bottom layer, 3 - polyester cloth layer. Detailed implementation mode

[0021] The present invention will be further described below in conjunction with the accompanying drawings of the specification to better understand the technical solution.

[0022] Example 1

[0023] The treatment of the polyester cloth is as follows:

[0024] 1) Turn on the power of the oven and raise the temperature of the drying tunnel to 80 °C;

[0025] 2) Select a suitable mesh number of sizing wheel, adjust the state of the sizing resin, stir evenly, then add the sizing resin evenly to the trough, turn on the sizing wheel, pass the polyester cloth over the sizing wheel, and press down the upper rubber wheel to start sizing;

[0026] 3) Press the sized polyester cloth with a needle plate and enter the drying tunnel for drying and shaping. The speed of the drying tunnel is 20 - 30 meters per minute, the temperature of the drying tunnel is 80 °C, and the length of the drying tunnel is 40 meters;

[0027] 4) After coming out of the drying tunnel, cool it to below 40 °C by air cooling for shaping, and then pass through a cutting machine to cut it into the required size, thus obtaining the treated polyester cloth.

[0028] Example 2

[0029] The formula of the base material layer is as follows: PVC: 25%; DOTP: 20%; CACO3: 50%; calcium-zinc stabilizer: 4%; carbon black: 1%.

[0030] The specific process steps are as follows:

[0031] 1) Mixing: Weigh the raw materials for preparing the LVT layer proportionally by automatic metering and put them into a high-speed mixing kettle for mixing. Stir at high speed for about 2 - 4 minutes, and convey the mixed material to the internal mixer through a conveyor shaft.

[0032] 2) Internal mixing and open mixing: After the mixed material enters the internal mixer, press down the internal mixing heavy hammer to start internal mixing. The internal mixing time is 3 - 5 minutes. After the internal mixing is completed, open the bottom door, put the preliminarily plasticized material on the conveyor belt and convey it to the open mixer. The open mixing time is 3 - 5 minutes, and the open mixing temperature is 170 - 190 °C. After complete plasticization in open mixing, convey it through the conveyor belt to 4-roll calendering.

[0033] 3) Calendering and cutting: The completely plasticized thick material undergoes 4-roll calendering, adjusted to the desired thickness and width. After being pulled out, it is cooled and shaped by a cooling wheel and then sent to a cutting machine to cut out the desired size.

[0034] The temperatures of the four rollers are as follows: roller 1: 170 - 180°C; roller 2: 170 - 180°C; roller 3: 150 - 160°C; roller 4: 140 - 150

[0035] 4) Hot pressing by the press: Lay the polyester cloth and the semi-finished LVT material with applied paste on the press loading tray in the arranged order, which is canvas, isolation film, polyester cloth, LVT base material, LVT middle material, color film layer, wear-resistant layer, isolation film, embossing plate in sequence. The function of the canvas is to reduce buffering, the function of the isolation film is to facilitate demolding, and the function of the embossing plate is to press appropriate patterns on the surface according to requirements. The hot pressing temperature is 130 - 150°C, the hot pressing pressure is 3 - 7 MPA, and the hot pressing time is 25 - 35 MIN. After hot pressing, transfer to cold pressing for cooling and shaping. The cold pressing temperature is 25 - 35°C, the cold pressing pressure is 7 - 13 MPA, and the cold pressing time is 30 - 40 minutes. After cold pressing, take it out and neatly place it on the tray.

[0036] 5) Perform UV coating treatment on the surface of the semi-finished product obtained in step 3), that is, coat a UV coating layer on the surface by roll coating method, and the coating amount is 6 - 22 g / ㎡. During this period, cure it through an ultraviolet light baking channel, and then perform secondary shaping through cold and hot water tempering.

[0037] 6) After slitting, grooving and edge trimming the semi-finished products made in the previous steps, wrap them in a paper box to obtain the finished product.

[0038] Test example

[0039] According to the step method of this application, a conventional LVT floor and an LVT floor with a polyester cloth attached are respectively made, and performance tests are carried out on both. The test items, methods and results are shown in the following table.

[0040]

[0041]

[0042]

[0043] As can be seen from the above table, 1. The LVT floor with a polyester cloth attached is significantly better than the ordinary LVT floor in resisting warping and can be applicable to various environmental temperatures. 2. Moreover, its impact resistance performance is significantly better than that of the ordinary LVT floor, and it can be better applicable to relatively harsh environments and resist larger impacts. 3. Its thermal expansion is significantly better than that of ordinary floors, and it can well resist problems such as floor arching caused by thermal expansion and contraction.

Claims

1. A polyester cloth composite LVT floor, comprising a surface layer (1) and a base material layer (2), wherein the surface layer (1) is composed of a wear-resistant layer (101) and a color film layer (102), and the base material layer (2) is composed of an LVT bottom material layer (202) and an LVT middle material layer (201), characterized in that, On one side of the base material layer (3) away from the surface layer (1), there is a polyester cloth layer (3) treated with sizing resin.

2. The polyester cloth composite LVT floor according to claim 1, characterized in that The polyester cloth layer (3) is a polyester non-woven fabric layer with a thickness of 0.2 - 2.0 mm.

3. The polyester cloth composite LVT floor according to claim 1, wherein The thickness of the wear-resistant layer (101) is 0.1 - 1.0 mm, the thickness of the color film layer (102) is 0.05 - 0.10 mm, and the thickness of the base material layer (2) is 1.8 - 4.8 mm.

4. The preparation method of a polyester cloth composite LVT floor according to any one of claims 1-3, characterized in that It includes the following steps: 1) Sizing the polyester non-woven fabric: Adjust the sizing resin to a viscous state, stir evenly, then add the sizing resin evenly to the trough. Start the sizing roller, pass the polyester cloth over the upper surface of the sizing roller, press down the upper and lower rubber wheels to perform sizing on the polyester non-woven fabric. 2) Press the polyester cloth with the applied sizing resin using a needle plate, enter the oven drying channel for drying and shaping. After coming out of the drying channel, cool it with air cooling, and then cut it to the required specifications by a cutting machine for standby. 3) Manufacturing the LVT layer: Stir the LVT layer raw materials evenly through an automatic mixing system and then transfer them to an internal mixer for preliminary plasticization. After internal mixing, fully plasticize it through a refining machine and press it through four calendering rolls. After cooling and shaping through a cooling roll, cut it into the required size according to needs to obtain the LVT base material and the LVT intermediate material respectively for standby. 4) Put the wear-resistant layer base material and the color film layer base material into the corresponding extruders for plasticizing and extruding respectively, and the temperature of the extruder is 145 - 170 °C. 5) Lay the canvas, isolation film, polyester cloth layer, LVT base material layer, LVT intermediate material layer, color film layer, wear-resistant layer, isolation film, and embossing plate in the press loading tray in sequence from bottom to top for hot pressing. After the hot pressing is completed, transfer it to cold pressing for cooling and shaping. After the cold pressing is completed, a semi-finished product is obtained. 6) Coating a UV coating layer on the surface of the semi-finished product obtained in step 5) by roll coating. During this period, cure it through a light drying channel, and then perform secondary shaping through cold and hot water tempering to obtain the finished product.

5. The preparation method of a polyester cloth composite LVT floor according to claim 4, characterized in that In step 2), the speed of the drying channel is 20 - 30 meters per minute, the temperature of the drying channel is 80 °C, and it is cooled to below 40 °C.

6. The preparation method of a polyester cloth composite LVT floor according to claim 4, characterized in that In step 3), the internal mixing time is 3 - 5 min, the refining temperature is 170 - 190 °C, and the temperatures of the four rolls are 135 - 155 °C.

7. The preparation method of a polyester cloth composite LVT floor according to claim 4, characterized in that In step 5), the hot pressing temperature is 130 - 150 °C, the hot pressing pressure is 3 - 7 MPA, and the hot pressing time is 25 - 35 MIN; the cold pressing temperature is 25 - 35 °C, the cold pressing pressure is 7 - 13 MPA, and the cold pressing time is 30 - 40 minutes.

8. The preparation method of a polyester cloth composite LVT floor according to claim 4, characterized in that In step 6), the coating amount of the UV coating is 6 - 22 g / ㎡.

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