PVC (polyvinyl chloride) embossed film as well as preparation method and application thereof

Abstract

The invention belongs to the field of membrane materials, and particularly relates to a PVC (polyvinyl chloride) embossed membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) taking two layers of pearlized films and a layer of non-woven fabric, respectively taking the two layers of pearlized films as an upper layer and a lower layer, and taking the non-woven fabric as a middle layer; and (2) adding a non-woven fabric to the two layers of pearlized films, and then sequentially performing leveling, unfolding, ultrasonic high-frequency vibration heating, embossing, embossing and the like. According to the preparation method, glue does not need to be added for preparation, and the defect of harmful gas volatilization caused by glue adopted in the prior art is overcome; meanwhile, the problems of easy fading and easy scratching due to long gluing time of glue are solved; in addition, according to the preparation method, ultrasonic high-frequency vibration heating is adopted, the purpose of bonding is achieved through self-melting of the pearlized film and the non-woven fabric, pollution to the environment is avoided, and green and environment-friendly effects are achieved; and the main raw materials adopted by the preparation method are recyclable and degradable materials, so that the environmental pollution is avoided.

Description

Technical Field

[0001] The invention belongs to the field of film materials, and specifically relates to a PVC embossed film and a preparation method and application thereof. Background Art

[0002] The reinforced aluminum film is mainly used for the color steel sandwich tile roof veneer of the farm, but the reinforced aluminum film is too thin, only 0.03mm thick, and is easily scratched during the construction process. It needs to be repaired after construction, which wastes manpower and material resources. At the same time, the reinforced aluminum film needs to be bonded with glue during the preparation process. The presence of chemical solvents will also volatilize harmful gases, which may cause discomfort to the operator and pollute the environment.

[0003] Therefore, based on this, the technical solution of the present invention is proposed. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a method for preparing a PVC embossed film, the preparation method comprising the following steps:

[0005] (1) taking two layers of pearlescent film and one layer of non-woven fabric, the two layers of pearlescent film are used as the upper layer and the lower layer respectively, and the non-woven fabric is laid flat between the upper layer and the lower layer as the middle layer;

[0006] (2) adding the two layers of pearlescent film to the nonwoven fabric, and then flattening them to obtain a flattened film;

[0007] (3) unfolding the flattened film to obtain an unfolded film;

[0008] (4) The unfolded film is subjected to ultrasonic high-frequency vibration heating, and after the two layers of pearlescent film and non-woven fabric are melt-bonded, embossing, embossing, trimming and rolling are sequentially performed to obtain the PVC embossed film.

[0009] Preferably, the pearlescent film is a BOPP (biaxially oriented polypropylene film) pearlescent film; the thickness of the BOPP pearlescent film is 25 to 80 μm.

[0010] Preferably, the non-woven fabric is PP non-woven fabric (non-woven fabric synthesized from polypropylene and polyester); the weight density of the PP non-woven fabric is 15 to 100 g / m 2 .

[0011] It should be noted that in actual production, the market demand for the thickness of PVC embossed film is often variable. The thickness of each layer of the present invention is variable, which can achieve personalized customization on the demand side.

[0012] Preferably, in step (2), the leveling method is: leveling by a magnetic powder motor of a material unloading rack.

[0013] Preferably, in step (3), the unfolding method is: unfolding by driving a spiral roller with a motor.

[0014] It should be emphasized that the method of ultrasonic high-frequency vibration heating in step (4) is: the energy is transmitted to the high-frequency transducer through a 2600-watt ultrasonic electric box, and the high-frequency transducer is equipped with a titanium alloy die head, which rubs against the BOPP pearlescent film to generate heat that reaches the melting point of the BOPP pearlescent film and the PP non-woven fabric, so that the two materials are tightly fitted together.

[0015] Preferably, in step (4), the winding core used for winding is a 76mm paper tube. Compared with the same type of color steel coils, the PVC embossed film coils are smaller in size and lighter in density, which is convenient for handling and greatly saves logistics costs. The core used for color steel coils and polyvinyl chloride is 500mm in diameter. Since the PVC embossed film is a flexible material, the core uses a 76mm paper tube, which saves space and reduces logistics and transportation costs.

[0016] Based on the same technical concept, another embodiment of the present invention is to provide a PVC embossed film obtained by the above preparation method.

[0017] Preferably, the PVC embossed film comprises a pearlescent film, a non-woven fabric and a pearlescent film in sequence from top to bottom.

[0018] Based on the same technical concept, another solution of the present invention is to provide an application of a PVC embossed film as a veneer for a color steel sandwich tile roof.

[0019] The beneficial effects of the present invention are:

[0020] 1. The preparation method of the present invention does not require the addition of glue for preparation, which solves the disadvantage of harmful gas volatilization caused by the use of glue in the prior art; at the same time, it solves the problem of easy fading and scratching caused by long-term glue bonding.

[0021] 2. The preparation method of the present invention adopts ultrasonic high-frequency vibration heating to achieve the purpose of bonding by melting the pearlescent film and the non-woven fabric itself, which will not cause pollution to the environment and is green and environmentally friendly.

[0022] 3. The main raw materials used in the preparation method of the present invention, the pearlescent film and the non-woven fabric, are both recyclable and degradable materials and will not cause pollution to the environment.

[0023] 4. The embossing and embossing on the surface of the PVC embossed film of the present invention are beautiful, smooth in line, and clear in texture, and have excellent market prospects. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0025] Example 1

[0026] This embodiment provides a method for preparing a PVC embossed film, the preparation method comprising the following steps:

[0027] (1) Take two layers of BOPP pearlescent film and one layer of PP non-woven fabric, use the two layers of BOPP pearlescent film as the upper layer and the lower layer respectively, and lay the PP non-woven fabric between the upper layer and the lower layer as the middle layer; wherein the thickness of the BOPP pearlescent film is 25 μm, and the weight density of the PP non-woven fabric layer is 15 g / m 2 ;

[0028] (2) adding the BOPP two-layer pearlescent film to the PP non-woven fabric, and then flattening it by a magnetic powder motor of a material unwinding rack to obtain a flattened film;

[0029] (3) the flattened film is then unfolded by a spiral roller driven by a motor to obtain an unfolded film;

[0030] (4) The unfolded film is subjected to ultrasonic high-frequency vibration heating, and after the two layers of pearlescent film and non-woven fabric are melted and bonded (transmitted to the high-frequency transducer through a 2600-watt ultrasonic electric box, the high-frequency transducer is equipped with a titanium alloy die head, and the die head rubs on the BOPP pearlescent film, thereby generating heat to reach the melting point of the BOPP pearlescent film and the PP non-woven fabric, so that the two materials are closely bonded together), embossing molding, embossing molding, trimming and winding are carried out in sequence to obtain the PVC embossed film.

[0031] Example 2

[0032] This embodiment provides a method for preparing a PVC embossed film, the preparation method comprising the following steps:

[0033] (1) Take two layers of BOPP pearlescent film and one layer of PP non-woven fabric, use the two layers of BOPP pearlescent film as the upper layer and the lower layer respectively, and lay the PP non-woven fabric between the upper layer and the lower layer as the middle layer; wherein the thickness of the BOPP pearlescent film is 80 μm, and the weight density of the PP non-woven fabric layer is 100 g / m 2 ;

[0034] (2) adding the BOPP two-layer pearlescent film to the PP non-woven fabric, and then flattening it by a magnetic powder motor of a material unwinding rack to obtain a flattened film;

[0035] (3) the flattened film is then unfolded by a spiral roller driven by a motor to obtain an unfolded film;

[0036] (4) The unfolded film is subjected to ultrasonic high-frequency vibration heating, and after the two layers of pearlescent film and non-woven fabric are melted and bonded (transmitted to the high-frequency transducer through a 2600-watt ultrasonic electric box, the high-frequency transducer is equipped with a titanium alloy die head, and the die head rubs on the BOPP pearlescent film, thereby generating heat to reach the melting point of the BOPP pearlescent film and the PP non-woven fabric, so that the two materials are closely bonded together), embossing molding, embossing molding, trimming and winding are carried out in sequence to obtain the PVC embossed film.

[0037] Example 3

[0038] This embodiment provides a method for preparing a PVC embossed film, the preparation method comprising the following steps:

[0039] (1) Take two layers of BOPP pearlescent film and one layer of PP non-woven fabric, use the two layers of BOPP pearlescent film as the upper layer and the lower layer respectively, and lay the PP non-woven fabric between the upper layer and the lower layer as the middle layer; wherein the thickness of the BOPP pearlescent film is 50 μm, and the weight density of the PP non-woven fabric layer is 60 g / m 2 ;

[0040] (2) adding the BOPP two-layer pearlescent film to the PP non-woven fabric, and then flattening it by a magnetic powder motor of a material unwinding rack to obtain a flattened film;

[0041] (3) the flattened film is then unfolded by a spiral roller driven by a motor to obtain an unfolded film;

[0042] (4) The unfolded film is subjected to ultrasonic high-frequency vibration heating, and after the two layers of pearlescent film and non-woven fabric are melted and bonded (transmitted to the high-frequency transducer through a 2600-watt ultrasonic electric box, the high-frequency transducer is equipped with a titanium alloy die head, and the die head rubs on the BOPP pearlescent film, thereby generating heat to reach the melting point of the BOPP pearlescent film and the PP non-woven fabric, so that the two materials are closely bonded together), embossing molding, embossing molding, trimming and winding are carried out in sequence to obtain the PVC embossed film.

[0043] Verification Example

[0044] The PVC embossed films obtained in Examples 1 to 3 were tested, and the test results are shown in Table 1.

[0045] Table 1

[0046]

[0047] It can be seen from Table 1 that after hot embossing of BOPP pearlescent film and PP non-woven fabric, the transverse and longitudinal tensile strength of PVC embossed film can be greater than 600Mpa / cm 3 The elongation at break is less than 2% in the longitudinal and transverse directions, the heat shrinkage is less than 1% in the longitudinal and transverse directions, and the light transmittance is less than 10%.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preparing a PVC embossed film, characterized in that: The preparation method comprises the following steps: (1) taking two layers of pearlescent film and one layer of non-woven fabric, the two layers of pearlescent film are used as the upper layer and the lower layer respectively, and the non-woven fabric is laid flat between the upper layer and the lower layer as the middle layer; (2) adding the two layers of pearlescent film to the nonwoven fabric, and then flattening them to obtain a flattened film; (3) unfolding the flattened film to obtain an unfolded film; (4) The unfolded film is subjected to ultrasonic high-frequency vibration heating, and after the two layers of pearlescent film and non-woven fabric are melt-bonded, embossing, embossing, trimming and rolling are sequentially performed to obtain the PVC embossed film.

2. The method for preparing the PVC embossed film according to claim 1, characterized in that: The pearlescent film is a BOPP pearlescent film; the thickness of the BOPP pearlescent film is 25 to 80 μm.

3. The method for preparing the PVC embossed film according to claim 1, characterized in that: The non-woven fabric is PP non-woven fabric; the weight density of the PP non-woven fabric is 15-100g / m 2 .

4. The method for preparing the PVC embossed film according to claim 1, characterized in that: In step (2), the leveling method is: leveling by a magnetic powder motor of a material unloading rack.

5. The method for preparing the PVC embossed film according to claim 1, characterized in that: In step (3), the unfolding method is: unfolding by driving the spiral roller with a motor.

6. The method for preparing the PVC embossed film according to claim 1, characterized in that: In step (4), the winding core used for winding is a 76mm paper tube.

7. The PVC embossed film obtained by the preparation method according to any one of claims 1 to 6.

8. The PVC embossed film according to claim 7, characterized in that: The PVC embossed film comprises a pearlescent film, a non-woven fabric and a pearlescent film in sequence from top to bottom.

9. Use of the PVC embossed film according to claim 7 or 8 as a veneer for a color steel sandwich tile roof.

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