CN215804128U - EVA/PVB laminated glass protection liquid crystal base film structure and glass unit for window - Google Patents

Abstract

The utility model relates to an EVA/PVB laminated glass protective liquid crystal base film structure and a glass unit for a window, wherein the structure comprises laminated glass and a liquid crystal base film, the laminated glass consists of at least two glass layers and polymer layers, the glass layers are arranged in parallel, and the polymer layers are adhered between the adjacent glass layers; the polymer layer is an ultraviolet-resistant EVA layer or an ultraviolet-resistant PVB layer; the liquid crystal base film is arranged on the inner side surface of the laminated glass, and the liquid crystal base film is a thermochromic film or an electrochromic film. The utility model can protect the liquid crystal base film, reduce the photodegradation of the liquid crystal base film, avoid the performance reduction of liquid crystal caused by using additives in the liquid crystal base film, and simplify the manufacturing process.

Description

EVA/PVB laminated glass protection liquid crystal base film structure and glass unit for window

Technical Field

The utility model relates to the technical field of liquid crystal films, in particular to an EVA/PVB laminated glass protective liquid crystal base film structure and a glass unit for a window.

Background

Due to the dynamic light modulation characteristics of liquid crystals and the maturity driven by the liquid crystal display industry, liquid crystal-based technologies are becoming an ideal choice for window applications. The biggest disadvantage of liquid crystal window devices is that, since the liquid crystal molecules are highly aromatic organic molecules, the liquid crystal material is susceptible to photo-degradation by solar radiation over the expected long service life. Uv inhibitors and other additives have limited efficacy in liquid crystals or liquid crystal/dye layers because they destroy liquid crystal properties at high concentrations. Furthermore, the liquid crystal-based cell used for light reduction is in a fluid state, and the provision of a liquid crystal film into laminated glass is difficult to achieve using standard high pressure/high temperature lamination processes.

In the prior art, an ultraviolet resistant additive can be added into ethylene-vinyl acetate copolymer (EVA) and polyvinyl butyral (PVB) materials, and the materials have ultraviolet resistant characteristics, and are applied to the fields such as interior decoration of buildings and automobile consoles/seats, and the like, and can prevent degradation and fading.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model aims to provide an EVA/PVB laminated glass protective liquid crystal-based film structure and a glass unit for a window, wherein the structure can protect a liquid crystal-based film, reduce the photodegradation of the liquid crystal-based film, avoid the reduction of liquid crystal performance caused by using an additive in the liquid crystal-based film, and simplify the manufacturing process.

To achieve the object of the present invention, the present invention provides an EVA/PVB laminated glass protective liquid crystal-based film structure, comprising: the laminated glass consists of at least two glass layers and polymer layers, wherein the glass layers are arranged in parallel, and the polymer layers are bonded between the adjacent glass layers; the polymer layer is an ultraviolet-resistant EVA layer or an ultraviolet-resistant PVB layer; the liquid crystal base film is arranged on the inner side surface of the laminated glass and is a thermochromic film or an electrochromic film.

The further technical scheme is that the size of the liquid crystal base film is smaller than that of the laminated glass, and the inner side surface of the laminated glass forms a gap outside the edge of the liquid crystal base film.

The further technical scheme is that the liquid crystal base film is arranged in the middle of the inner side face of the laminated glass, and the gap surrounds the liquid crystal base film.

The further technical proposal is that the number of the glass layers is two or three.

The further technical proposal is that the liquid crystal base film is adhered to the inner side surface of the laminated glass by a pressure-sensitive adhesive.

The further technical proposal is that other liquid crystal base films are not adhered to the outer side surface of the laminated glass.

To achieve the object of the present invention, the present invention also provides a glass unit for a window, which comprises the EVA/PVB laminated glass protective liquid crystal-based film structure of any of the above aspects.

The glass unit for the window further comprises a spacer and a glass plate, wherein the glass plate is arranged on the inner side of the laminated glass, the liquid crystal-based film is positioned between the laminated glass and the glass plate, the spacer is arranged between the laminated glass and the glass plate, and the thickness of the spacer is greater than that of the liquid crystal-based film.

The further technical scheme is that the size of the liquid crystal base film is smaller than that of the laminated glass, and a gap surrounding the liquid crystal base film is formed at the edge of the inner side surface of the laminated glass; the spacer surrounds the liquid crystal-based film and is disposed between the gap and the glass plate.

A further solution is that the glazing unit for windows further comprises a seal surrounding the outside of the spacer and arranged between the interspace and the glass pane.

The further technical scheme is that the glass plate is low-emissivity glass.

Compared with the prior art, the utility model can obtain the following beneficial effects:

the liquid crystal base film is protected by the sandwich glass sandwiched with the ultraviolet-resistant EVA or the ultraviolet-resistant PVB, the sandwich glass is used as an ultraviolet protective layer and is attached to the liquid crystal base film, when the sandwich glass is applied to a window, the sandwich glass is arranged outside the liquid crystal base film, the liquid crystal base film is arranged inside the sandwich glass, the sandwich glass can reduce the photodegradation of the liquid crystal base film, the durability of the liquid crystal base film is improved, and the liquid crystal performance is prevented from being reduced due to the use of additives in the liquid crystal base film. The laminated glass with the uvioresistant EVA or the uvioresistant PVB can form a standardized product, the liquid crystal base film can be conveniently attached to the inner side face of the laminated glass through a pressure-sensitive adhesive and the like, and the manufacturing process is simple. The EVA/PVB laminated glass protective liquid crystal-based film structure can be conveniently used for a window glass unit, for example, the EVA/PVB laminated glass protective liquid crystal-based film structure can be used as an outer glass plate of a hollow glass unit and matched with other low-emissivity glass, so that the solar heat gain is inhibited to the maximum extent.

Drawings

FIG. 1 is a schematic structural diagram of an example of an EVA/PVB laminated glass protective liquid crystal-based film structure according to the present invention.

FIG. 2 is a schematic view of a portion of an embodiment of a glazing unit of the utility model.

FIG. 3 is a schematic cross-sectional view of an embodiment of the glazing unit of the utility model.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Detailed Description

As shown in fig. 1 to 3, the EVA/PVB laminated glass protective liquid crystal-based film structure of the present embodiment includes a laminated glass and a liquid crystal-based film 1. The laminated glass consists of two glass layers 2 and two polymer layers 3, the two glass layers 2 are arranged in parallel, and the polymer layers 3 are bonded between the adjacent glass layers 2. In other embodiments of the present invention, the number of glass layers 2 may also be more than two, for example, three, and the polymer layer 3 is bonded between each two adjacent glass layers 2.

Laminated glass uses layers of EVA or PVB polymer known to have uv blocking properties to bond adjacent glass sheets 2 together. The polymer layer 3 is made of an anti-ultraviolet EVA material or an anti-ultraviolet PVB material, which has good light transmittance, and light stabilizers, ultraviolet absorbers, etc. are added to the polymer or other modifications can also improve the anti-ultraviolet performance, i.e. the anti-ultraviolet performance or the anti-ultraviolet performance, and the anti-ultraviolet EVA material or the anti-ultraviolet PVB material is the existing material, for example, the anti-ultraviolet EVA material can be the existing EVA material with the trade marks of UL04028, UL04533, 2825A, 3325AC, UE3330, EV150, MA-10, 3345, KA-40, VA810, and can also be the examples described in the previous chinese patent applications with application numbers of 201010011704.0, 201310350244.8, for example, the anti-ultraviolet material can be the examples described in the previous chinese patent applications with application numbers of 201611199520.5, 201610099064.0.

The liquid crystal-based film 1 is arranged on the inner side surface of the laminated glass, and other liquid crystal-based films are not adhered to the outer side surface of the laminated glass. The laminated glass can protect the liquid crystal-based film 1 from ultraviolet rays. The inner side of the laminated glass is the surface facing the room when applied. The liquid crystal-based film 1 is a conventional liquid crystal-based film, and is generally formed by sandwiching a liquid crystal or a liquid crystal and a dye in a substrate such as PET. In the present embodiment, the liquid crystal-based film may be a thermochromic liquid crystal-based film, i.e., a film in which the orientation of liquid crystals is thermally activated to thereby achieve color change, and may be exemplified by those described in the prior chinese patent applications having application numbers 202010449426.0, 202010448521.9, 201911041372.8, for example. The liquid crystal based film may also be an electrochromic liquid crystal based film, i.e. a film that is aligned by electrically activated liquid crystals to achieve color change, such as may be exemplified by those described in the prior chinese patent application No. 201610889898.1, 201610936589.5. It is sufficient that the orientation of the liquid crystal or the dye can be changed according to the temperature or the electric field to change the color of the liquid crystal-based film, so that the liquid crystal-based film can dynamically adjust and block the light.

Preferably, the liquid crystal-based film 1 has a size smaller than that of the laminated glass, and the inner side of the laminated glass forms the gap 4 outside the edge of the liquid crystal-based film 1. The liquid crystal-based film 1 may be disposed in the middle of the inner side of the laminated glass with the gap 4 surrounding the liquid crystal-based film 1. The size of the liquid crystal-based film 1 can be selected according to the size of the laminated glass, and the gap 4 reserves a space for the EVA/PVB laminated glass to be matched with other glass when the liquid crystal-based film is used for protecting a window so as to ensure the structural integrity.

Preferably, the liquid crystal-based film 1 is adhered to the inner side of the laminated glass by a Pressure Sensitive Adhesive (PSA). For example, the pressure-sensitive adhesive may be transferred or coated on the liquid crystal-based film 1 in advance, and then the liquid crystal-based film 1 is placed on the inner side of the laminated glass, and the liquid crystal-based film 1 can firmly adhere to the inner side of the laminated glass after pressure is applied. The liquid crystal base film 1 and the laminated glass are simple and convenient to assemble, and the liquid crystal base film 1 and the laminated glass can be used as an outer glass plate of the hollow glass unit after being assembled.

The EVA/PVB laminated glass protective liquid crystal-based film structure of the present example can be used to make a glazing unit for a window. The glazing unit for a window further comprises a spacer 5 and a glass pane 6, the glass pane 6 being arranged on the inside of the laminated glass, the glass pane 6 being the inner glass pane. The liquid crystal base film 1 is positioned between the laminated glass and the glass plate 6, the spacer 5 is arranged between the laminated glass and the glass plate 6, the thickness of the spacer 5 is larger than that of the liquid crystal base film 1, the spacer 5 is used for keeping the distance between the laminated glass and the glass plate 6, a hollow structure is formed between the laminated glass and the glass plate 6, indoor and outdoor heat transfer is reduced, and a heat insulation effect is achieved to inhibit solar heat gain.

Preferably, spacers 5 surround the liquid crystal-based film 1 and are arranged between the gap 4 and the glass plate 6, the spacers 5 being able to perform a substantial sealing action. For the electrochromic liquid crystal-based film 1, the spacer 5 may be provided with a gap for passing a conductor connected to the conductive substrate of the electrochromic liquid crystal-based film 1. For the thermochromic liquid crystal-based film 1, the liquid crystal-based film 1 need not be connected to the outside, and the spacer 5 may completely enclose the liquid crystal-based film 1. The spacer 5 does not extend beyond the edges of the laminated glass and the glass plate 6, and the spacer 5 can be better protected. The spacer 5 may be, for example, a sealing tape or the like.

Preferably, the glazing unit for a window further comprises a seal 7, the seal 7 surrounding the outside of the spacer 5 and being arranged between the interspace 4 and the glass pane 6. The seal 7 may serve as a second level of sealing. The sealing member 7 may be formed by pressing a sealant between the gap 4 and the glass plate 6 and then curing the sealant. The space 4 may be divided into an inner region in contact with the spacer 5 and an outer region in contact with the seal 7.

Preferably, the glass plate 6 is LOW-emissivity glass, also called LOW-E glass, which is a conventional film product formed by coating a plurality of layers of metals or other compounds on the surface of glass, and the coating layer has the characteristics of high visible light transmittance and high middle and far infrared ray reflectance, and has excellent heat insulation effect and good light transmittance compared with common glass and traditional building coated glass. The low-emissivity glass can be, for example, the existing glass which meets the requirements of GB/T18915 on low-emissivity coated glass.

Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the utility model, which is not intended to limit the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. EVA/PVB laminated glass protection liquid crystal base film structure, its characterized in that includes:

   the laminated glass comprises at least two glass layers and polymer layers, wherein the glass layers are arranged in parallel, and the polymer layers are bonded between the adjacent glass layers; the polymer layer is an ultraviolet-resistant EVA layer or an ultraviolet-resistant PVB layer;

   the liquid crystal base film is arranged on the inner side surface of the laminated glass and is a thermochromic film or an electrochromic film.
2. 2. The EVA/PVB laminated glass protective liquid crystal-based film structure of claim 1, wherein:

   the size of the liquid crystal-based film is smaller than that of the laminated glass, and the inner side surface of the laminated glass forms a gap surrounding the liquid crystal-based film outside the edge of the liquid crystal-based film.
3. 3. The EVA/PVB laminated glass protective liquid crystal based film structure of claim 1 or 2, characterized in that:

   the number of the glass layers is two or three.
4. 4. The EVA/PVB laminated glass protective liquid crystal based film structure of claim 1 or 2, characterized in that:

   the liquid crystal-based film is adhered to the inner side of the laminated glass by a pressure-sensitive adhesive.
5. 5. The EVA/PVB laminated glass protective liquid crystal based film structure of claim 1 or 2, characterized in that:

   and other liquid crystal base films are not adhered to the outer side surface of the laminated glass.
6. 6. Glazing unit for windows, characterized in that it comprises an EVA/PVB laminated glass protective liquid crystal-based film structure according to any of claims 1 to 5.
7. 7. The glass unit for windows of claim 6, wherein:

   the window glass unit further comprises a spacer and a glass plate, wherein the glass plate is arranged on the inner side of the laminated glass, the liquid crystal-based film is positioned between the laminated glass and the glass plate, the spacer is arranged between the laminated glass and the glass plate, and the thickness of the spacer is larger than that of the liquid crystal-based film.
8. 8. The glass unit for windows of claim 7, wherein:

   the size of the liquid crystal-based film is smaller than that of the laminated glass, and the inner side edge of the laminated glass forms a gap surrounding the liquid crystal-based film; the spacer surrounds the liquid crystal-based film and is disposed between the gap and the glass plate.
9. 9. The glass unit for windows of claim 8, wherein:

   the glazing unit further comprises a seal surrounding the outside of the spacer and disposed between the gap and the glass sheet.
10. 10. A glass unit for a window according to claim 9, wherein:

    the glass plate is low-emissivity glass.

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