Reflection type polarizing film

Abstract

The utility model discloses a reflective polarizing film, and particularly relates to the technical field of polarizing films, which comprises a polarizing protective film, a first TAC film is arranged at the lower end of the polarizing protective film, a PVA coating is arranged at the lower end of the first TAC film, a second TAC film is arranged at the lower end of the PVA coating, and a one-way reflective film is arranged at the lower end of the second TAC film. A first pressure-sensitive adhesive layer is arranged at the lower end of the one-way reflecting film, a bottom-layer base film is arranged at the lower end of the first pressure-sensitive adhesive layer, and a second pressure-sensitive adhesive layer is arranged at the lower end of the bottom-layer base film. When the polarizing film is actually used, the base film at the bottom layer is made of a resin material and is manufactured by a stretching process, so that the overall environmental tolerance of the polarizing film can be effectively improved, and meanwhile, due to the light transmission of one surface of the unidirectional reflecting film and the light reflection of the other surface of the unidirectional reflecting film, an external light source can pass through the light transmission surface of the unidirectional reflecting film; and when the light source is reflected by the photovoltaic power generation panel, the light reflecting surface of the one-way reflecting film blocks the light source.

Description

Technical Field

[0001] The utility model relates to the technical field of polarizing films, and more specifically, to a reflective polarizing film. Background Art

[0002] A solar photovoltaic system is a facility that converts solar energy into direct current electricity using the photovoltaic effect of photovoltaic semiconductor materials. The core of a photovoltaic system is a solar panel. The semiconductor materials used for power generation primarily include monocrystalline silicon, polycrystalline silicon, amorphous silicon, and cadmium telluride. To ensure efficient light source utilization and protect solar photovoltaic panels, a polarizing film is typically applied to their surface. For example, prior art publication CN110441851A discloses a highly durable reflective polarizing film. The film comprises, from top to bottom, a protective film, an aluminum reflective film, a coating, a first pressure-sensitive adhesive layer, a polarizing film substrate, a second pressure-sensitive adhesive layer, and a release film. The aluminum reflective film comprises a substrate, an aluminum-plated layer disposed on the substrate, and the coating overlying the aluminum-plated layer. The aluminum reflective film is bonded to the first pressure-sensitive adhesive layer via the coating. The substrate is polyethylene terephthalate, and the coating is 5 μm thick. Compared to the prior art, this embodiment effectively prevents the aluminum film from being corroded by H-ions released by the carboxyl groups (-COOH) in the PSA adhesive by adding a coating between the first pressure-sensitive adhesive layer and the aluminum reflective film. In other embodiments, the thickness of the coating can be appropriately adjusted within a range of 1-10 μm.

[0003] When the polarizing film is in use, it effectively prevents the aluminum layer from being corroded by water vapor, H- from PSA glue, etc. during the use of LCD products, thereby improving the barrier performance of the aluminum film and increasing the service life of the reflective polarizing film. At the same time, the first pressure-sensitive adhesive is an acid-free adhesive, which reduces the content of carboxylic acid groups in the glue and reduces the corrosion of the aluminum reflective film by H+ ions, air, and oxygen in water vapor during the temperature and humidity test. The test results show that the polarizing film provided by the invention can effectively improve the temperature and humidity weathering resistance and extend the service life. The polarizing film does not have the phenomenon of corrosion and shedding of the aluminum reflective film, and the reflective performance of the polarizing film remains unchanged, and the use effect can be maintained. However, after the external light source is incident on the polarizing film, it will be directly reflected outward. The utilization rate of the light source needs to be further improved, and the utilization rate of the light energy of the light source in the liquid crystal display module needs to be improved. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a reflective polarizing film. The technical problem to be solved by the present invention is: how to increase the efficiency of the polarizing film in utilizing light sources.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a reflective polarizing film, comprising a polarizing protective film, a first TAC film being provided at the lower end thereof, a PVA coating being provided at the lower end thereof, a second TAC film being provided at the lower end thereof, and a unidirectional reflective film being provided at the lower end thereof;

[0006] A first pressure-sensitive adhesive layer is provided at the lower end of the one-way reflective film, a bottom base film is provided at the lower end of the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer is provided at the lower end of the bottom base film, and a release film is provided at the lower end of the second pressure-sensitive adhesive layer.

[0007] In a preferred embodiment, the polarizing protective film has a first TAC film provided at its lower end, a PVA coating provided at its lower end, a second TAC film provided at its lower end, and a unidirectional reflective film provided at its lower end;

[0008] A first pressure-sensitive adhesive layer is provided at the lower end of the one-way reflective film, a bottom base film is provided at the lower end of the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer is provided at the lower end of the bottom base film, and a release film is provided at the lower end of the second pressure-sensitive adhesive layer;

[0009] The first TAC film and the second TAC film have the same specifications, and the first TAC film and the second TAC film are connected by heat pressing.

[0010] In a preferred embodiment, the polarizing protective film has a first TAC film provided at its lower end, a PVA coating provided at its lower end, a second TAC film provided at its lower end, and a unidirectional reflective film provided at its lower end;

[0011] A first pressure-sensitive adhesive layer is provided at the lower end of the one-way reflective film, a bottom base film is provided at the lower end of the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer is provided at the lower end of the bottom base film, and a release film is provided at the lower end of the second pressure-sensitive adhesive layer;

[0012] The first TAC film and the second TAC film are both made of triacetate fiber. One end of the one-way reflection film is a light-transmitting surface, and the other end is a light-reflecting surface.

[0013] In a preferred embodiment, the polarizing protective film has a first TAC film provided at its lower end, a PVA coating provided at its lower end, a second TAC film provided at its lower end, and a unidirectional reflective film provided at its lower end;

[0014] A first pressure-sensitive adhesive layer is provided at the lower end of the one-way reflective film, a bottom base film is provided at the lower end of the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer is provided at the lower end of the bottom base film, and a release film is provided at the lower end of the second pressure-sensitive adhesive layer;

[0015] The PVA coating is made of polyvinyl alcohol, and the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are made of polyacrylate resin.

[0016] In a preferred embodiment, the bottom base film is a resin material component.

[0017] In a preferred embodiment, the release film is a plastic film component, and the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer have the same thickness in the main viewing direction.

[0018] The technical effects and advantages of this utility model are:

[0019] When the present invention is actually used, the bottom base film is made of resin material and is made through a stretching process, which can effectively increase the overall environmental tolerance of the polarizing film. At the same time, the one-way reflective film has light transmittance on one side and light reflectivity on the other side, so that the external light source can pass through the light transmittance side of the one-way reflective film. When reflected by the photovoltaic panel, the reflective surface of the one-way reflective film will block the light source, thereby effectively increasing the effect of the polarizing film on the utilization of the light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 This is a schematic diagram of the overall main structure of the utility model.

[0024] Figure 3 This is a schematic diagram of the overall connection structure of the utility model.

[0025] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0026] The reference numerals in the drawings are: 1 polarizing protective film, 2 release film, 3 bottom base film, 4 one-way reflective film, 5 second TAC film, 6 first TAC film, 7 second pressure-sensitive adhesive layer, 8 first pressure-sensitive adhesive layer, 9 PVA coating. DETAILED DESCRIPTION

[0027] The utility model provides a reflective polarizing film, such as Figure 1 and 2 As shown, it includes a polarizing protective film 1, a first TAC film 6 is provided at the lower end thereof, the first TAC film 6 and the second TAC film 5 have the same specifications, and the first TAC film 6 and the second TAC film 5 are connected by hot pressing, and the first TAC film 6 and the second TAC film 5 are both made of triacetate, which can effectively increase the optical uniformity, transparency, acid and alkali resistance and UV resistance of the first TAC film 6 and the second TAC film 5;

[0028] One end of the one-way reflective film 4 is a light-transmitting surface, and the other end is a light-reflecting surface. The external light source will be incident on the lower end of the one-way reflective film 4 from the light-transmitting surface of the one-way reflective film 4. When the light source is reflected upward from the upper end of the underlying base film 3, the reflective surface of the one-way reflective film 4 will block the light source, thereby making full use of the energy of the light source. The underlying base film 3 is a resin material component, and after a stretching process, it can effectively increase the environmental tolerance of the underlying base film 3. The release film 2 is a plastic film material component.

[0029] like Figure 3 and 4 As shown, the lower end of the first TAC film 6 is provided with a PVA coating 9, the lower end of the PVA coating 9 is provided with a second TAC film 5, the lower end of the one-way reflective film 4 is provided with a first pressure-sensitive adhesive layer 8, the lower end of the first pressure-sensitive adhesive layer 8 is provided with an underlying base film 3, and the lower end of the underlying base film 3 is provided with a second pressure-sensitive adhesive layer 7;

[0030] A release film 2 is provided at the lower end of the second pressure-sensitive adhesive layer 7, the PVA coating 9 is a component made of polyvinyl alcohol, the first pressure-sensitive adhesive layer 8 and the second pressure-sensitive adhesive layer 7 are made of polyacrylate resin, and the first pressure-sensitive adhesive layer 8 and the second pressure-sensitive adhesive layer 7 have the same thickness in the main viewing direction.

[0031] Working principle of this utility model:

[0032] When the present invention is used, the staff will tear off the release film 2 from the lower end of the second pressure-sensitive adhesive layer 7, and then the polarizing film can be attached to the upper end of the photovoltaic panel, and the bubbles and protrusions inside the polarizing film can be squeezed out through external equipment. Then, when the external light source is irradiated on the polarizing protective film 1, the light source will pass through the first TAC film 6, the PVA coating 9 and the second TAC film 5, and pass through the light-transmitting surface of the one-way reflection film 4. When the light source is irradiated on the upper end of the photovoltaic panel for reflection, it will be blocked by the reflective surface of the one-way reflection film 4, which can effectively enable the photovoltaic panel to make full use of the external light source.

[0033] Finally, a few points should be explained: the drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reflective polarizing film, characterized in that: include: A polarizing protective film (1) is provided with a first TAC film (6) at its lower end, a PVA coating (9) is provided at the lower end of the first TAC film (6), a second TAC film (5) is provided at the lower end of the PVA coating (9), and a one-way reflection film (4) is provided at the lower end of the second TAC film (5); The lower end of the one-way reflective film (4) is provided with a first pressure-sensitive adhesive layer (8), the lower end of the first pressure-sensitive adhesive layer (8) is provided with a bottom base film (3), the lower end of the bottom base film (3) is provided with a second pressure-sensitive adhesive layer (7), and the lower end of the second pressure-sensitive adhesive layer (7) is provided with a release film (2).

2. The reflective polarizing film according to claim 1, wherein: The first TAC film (6) and the second TAC film (5) have the same specifications, and the first TAC film (6) and the second TAC film (5) are connected by hot pressing.

3. The reflective polarizing film according to claim 1, wherein: The first TAC film (6) and the second TAC film (5) are both made of triacetate fiber material; one end of the one-way reflection film (4) is a light-transmitting surface, and the other end is a light-reflecting surface.

4. The reflective polarizing film according to claim 1, wherein: The PVA coating (9) is a component made of polyvinyl alcohol, and the first pressure-sensitive adhesive layer (8) and the second pressure-sensitive adhesive layer (7) are made of polyacrylate resin.

5. The reflective polarizing film according to claim 1, wherein: The bottom base film (3) is a resin material component.

6. The reflective polarizing film according to claim 1, wherein: The release film (2) is a component made of a plastic film material, and the first pressure-sensitive adhesive layer (8) and the second pressure-sensitive adhesive layer (7) have the same thickness in the main viewing direction.

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