Direct bonding PDLC film structure

Abstract

The present application relates to the technical field of PDLC dimming film, and particularly relates to a direct pasting type PDLC film structure. The direct pasting type PDLC film structure comprises a PDLC dimming film, an adhesive piece and a supporting piece. The adhesive piece is arranged on the circumferential edge of the PDLC dimming film. The PDLC dimming film is pasted on the glass through the adhesive piece. The supporting piece is arranged between the PDLC dimming film and the glass in the circumferential direction. The PDLC dimming film acts on the supporting piece to make the supporting piece produce different deformations at different positions. A closed cavity is formed between the PDLC dimming film and the glass. The direct pasting type PDLC film structure can paste the PDLC dimming film on the glass of a double curved surface, and solves the problem that the existing direct pasting film cannot be pasted on the glass of a double curved surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PDLC dimming film, in particular to a direct pasting type PDLC film structure. BACKGROUND

[0002] The PDLC dimming film is a kind of composite dimming film formed by coating a polymer dispersed liquid crystal layer between two PEI-ITO films, and then polymerizing the polymer through photo-curing or thermal curing to bond the two PEI-ITO films together. The PDLC dimming film becomes transparent under the condition of power-on, and becomes foggy when power-off, which is a new type of electronic window curtain with sun-shading and heat-insulating functions. The PDLC dimming film is pasted on the glass of the sunroof, and the dimming film becomes transparent when power-on, so that the same experience as the pure sunroof glass can be enjoyed, and the dimming film becomes foggy when power-off, so that the sun-shading and heat-insulating problems of the driver and passengers can be solved. At present, the PDLC dimming film is mainly applied in the fields of indoor partition, glass curtain wall and automobile glass.

[0003] The existing self-pasting or direct pasting type PDLC dimming film for pasting on glass is an integral film with back adhesive or an integral film with AB adhesive. The self-pasting or direct pasting type PDLC dimming film can be pasted on a planar glass, but cannot be pasted on a sunroof or sunroof glass. Since the sunroof of the automobile is a glass with a double curved spherical surface, the planar PDLC dimming film pasted on the glass with a double curved spherical surface will inevitably cause wrinkles and other problems. SUMMARY

[0004] The present application aims to provide a direct pasting type PDLC film structure to alleviate the problem that the planar PDLC dimming film pasted on the glass with a double curved spherical surface will cause wrinkles.

[0005] To solve the above technical problems, the technical solution provided by the present application is as follows:

[0006] A direct pasting type PDLC film structure, comprising: a PDLC dimming film, an adhesive member and a support member, the adhesive member is arranged at the circumferential edge of the PDLC dimming film, the PDLC dimming film is pasted on the glass through the adhesive member, and the support member is arranged between the PDLC dimming film and the glass in the circumferential direction.

[0007] The PDLC dimming film acts on the support member to cause different deformations of the support member at different positions, and a closed cavity is formed between the PDLC dimming film and the glass.

[0008] Further,

[0009] The support member is arranged at the circumferential edge of the adhesive member, or the support member is arranged at the circumferential edge of the adhesive member.

[0010] Further,

[0011] The support is a support strip made of silica gel or acrylic material, and the height of the support strip ranges from 1 to 10 mm.

[0012] Further,

[0013] One side of the adhesive member is attached to the PDLC light control film, and the other side is used to attach the PDLC light control film to glass.

[0014] Further,

[0015] The outer edge of the adhesive member coincides with the outer edge of the PDLC light control film.

[0016] Further,

[0017] The adhesive member is double-sided tape, and the double-sided tape is made of OCA glue, silica gel, or foam double-sided tape.

[0018] Further,

[0019] The width of the double-sided tape ranges from 2 cm to 20 cm, and the peel strength of the double-sided tape is greater than 1000 gf / 25 mm.

[0020] Further,

[0021] The PDLC light control film is provided with an air valve for filling and discharging air into the sealed cavity, and the air valve is a one-way valve.

[0022] Further,

[0023] The PDLC light control film is provided with an air inlet and an air outlet at opposite corners.

[0024] Further,

[0025] The support is provided with a plurality of air outlets, the initial section of the support protrudes from the fitting area and is provided with an air inlet, and the end section of the support is provided with an air outlet, the air inlet is used to introduce inert gas into the sealed cavity, the air outlets are used to discharge the introduced inert gas, and the air outlet is used to discharge excess gas in the sealed cavity.

[0026] The present application at least brings the following beneficial effects:

[0027] The present application provides a direct pasting PDLC film structure, comprising a PDLC dimming film, an adhesive member and a support member, the adhesive member is arranged on the circumferential edge of the PDLC dimming film, the PDLC dimming film is pasted on the glass through the adhesive member, and the support member is arranged between the PDLC dimming film and the glass in the circumferential direction; the PDLC dimming film acts on the support member to make the support member produce different deformations at different positions, and a closed cavity is formed between the PDLC dimming film and the glass.

[0028] The support member is pasted on the glass along the pasting area of the PDLC dimming film through the adhesive member, the support member can support the PDLC dimming film, the support member is higher than the surface of the glass, and the deformation degree of the support member is different under different pressures, so that the closed cavity is formed between the PDLC dimming film and the glass. The PDLC dimming film produces different deformations by pressing the support member at different positions with different forces, so as to reduce the height difference of the planar PDLC dimming film pasted on the double-curved glass, so that the PDLC dimming film remains flat and does not wrinkle, and can be flat and straight pasted on the surface of the glass.

[0029] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the specific embodiments or related art, the following will briefly introduce the drawings needed to be used in the specific embodiments or related art descriptions. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0031] Figure 1 The schematic diagram of the direct pasting PDLC film structure provided by the embodiments of the present application is shown in the figure;

[0032] Figure 2 The A-A sectional view of the figure Figure 1

[0033] The B-B sectional view of the figure Figure 3 Figure 1 The schematic diagram of a support member provided by the embodiments of the present application is shown in the figure;

[0034] Figure 4 The schematic diagram of an adhesive member provided by the embodiments of the present application is shown in the figure.

[0035] Figure 5 Figure legend:

[0036] Figure legend: ​

[0037] 100 - PDLC light modulation film; 200 - adhesive; 300 - support; 310 - air outlet; 320 - air inlet; 330 - air outlet; 400 - glass. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, such as basic quantities of International System of Units, or derived quantities derived from basic quantities by multiplication, division, differentiation, or integration, etc. mathematical operations, should be understood as basic quantities of International System of Units, or derived quantities derived from basic quantities by multiplication, division, differentiation, or integration, etc. mathematical operations.

[0041] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0042] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Some embodiments of the present application will be described in detail with reference to the drawings. The following embodiments and features of the embodiments described below can be combined with each other in the case of no conflict. Among them, Figure 1 A schematic diagram of the direct-adhesion PDLC film structure provided by the embodiments of the present application is shown in the following figure; Figure 2 A schematic diagram of the direct-adhesion PDLC film structure provided by the embodiments of the present application is shown in the following figure; Figure 1 A-A cross-sectional view of the direct-adhesion PDLC film structure provided by the embodiments of the present application is shown in the following figure; Figure 3 B-B cross-sectional view of the direct-adhesion PDLC film structure provided by the embodiments of the present application is shown in the following figure; Figure 1 B-B cross-sectional view of the direct-adhesion PDLC film structure provided by the embodiments of the present application is shown in the following figure; Figure 4 A schematic diagram of a support provided by the embodiments of the present application is shown in the following figure; Figure 5 A schematic diagram of an adhesive provided by the embodiments of the present application is shown in the following figure.

[0044] Embodiment one

[0045] The existing self-adhesion or direct-adhesion PDLC dimming film for pasting on glass is whole-film back adhesive or whole-film AB adhesive. This kind of self-adhesion or direct-adhesion PDLC dimming film can be pasted on a planar glass, but cannot be pasted on a sunroof or a dome glass. Since the sunroof of a vehicle is a double-curved spherical glass, the planar PDLC dimming film pasted on the double-curved spherical glass will inevitably cause wrinkles and other problems.

[0046] Therefore, the embodiments of the present application provide a direct-adhesion PDLC film structure, which comprises a PDLC dimming film 100, an adhesive 200 and a support 300. The adhesive 200 is arranged on the circumferential edge of the PDLC dimming film 100, the PDLC dimming film 100 is pasted on a glass 400 through the adhesive 200, and the support 300 is arranged between the PDLC dimming film 100 and the glass 400 in a circumferential direction. The PDLC dimming film 100 acts on the support 300 to make the support 300 deform at different positions, and a sealed cavity is formed between the PDLC dimming film 100 and the glass 400.

[0047] The support 300 is pasted on the glass 400 along the adhesive 200 at the inner side of the pasting position of the PDLC dimming film 100. The support 300 can support the PDLC dimming film 100 to a certain extent, and the support 300 is higher than the surface of the glass 400 and deforms to different degrees under different pressures, so that the sealed cavity is formed between the PDLC dimming film 100 and the glass 400. The PDLC dimming film 100 deforms at different positions and with different forces to press the support 300, so as to reduce the height difference of the planar PDLC dimming film 100 pasted on the double-curved glass 400, so that the PDLC dimming film 100 remains flat and not wrinkled, and can be pasted flat and straight on the surface of the glass 400.

[0048] It should be noted that the soft support 300 and the low-thickness rigid support 300 can be deformed at different positions to form airtight cavities between the PDLC dimming film 100 and the glass 400.

[0049] In an optional mode of the embodiment, the support 300 is arranged on the adhesive 200, or the support 300 is arranged on the circumferential edge of the adhesive 200.

[0050] For details, see Figure 1 The support 300 can be arranged on the adhesive 200 or on the circumferential edge of the adhesive 200, 2-10 cm away from the edge of the PDLC dimming film 100. The support 300 is a support strip made of silicone or acrylic material, and the height of the support strip ranges from 1-10 mm.

[0051] The support strip is made of soft silicone or low-thickness rigid acrylic material, and has a single-sided adhesive backing, which can overcome the height difference of the double-curved spherical glass 400 and is the most critical factor for keeping the PDLC dimming film 100 flat. The PDLC dimming film 100 with different curvatures can select support strips with different thicknesses. The greater the curvature of the PDLC dimming film 100, the greater the thickness of the selected support strip.

[0052] In an optional mode of the embodiment, one side of the adhesive 200 is attached to the PDLC dimming film 100, and the other side is used to attach the PDLC dimming film 100 to the glass 400. The outer edge of the adhesive 200 coincides with the outer edge of the PDLC dimming film 100.

[0053] Further, the adhesive 200 is double-sided adhesive tape, and the double-sided adhesive tape is made of OCA glue, silicone or foam double-sided adhesive tape. The width of the double-sided adhesive tape ranges from 2 cm to 20 cm, and the peel strength of the double-sided adhesive tape is greater than 1000 gf / 25 mm.

[0054] For details, see Figure 2 and Figure 3 The double-sided adhesive tape is arranged at the edge of the film attachment area, the outer edge of the double-sided adhesive tape coincides with the outer edge of the PDLC dimming film 100, one side of the double-sided adhesive tape is attached to the glass 400, and the other side is attached to the PDLC dimming film 100.

[0055] For further details, see Figure 5 The setting method of the double-sided adhesive tape and the support strip is to peel off the release film on one side of the double-sided adhesive tape and attach it to the outermost edge of the PDLC dimming film 100 or the film attachment area of the glass 400, and the double-sided adhesive tapes on the adjacent two edges are cross attached, but not limited to the cross method in Figure 5 to ensure airtightness. Then, the support strip is attached to the glass 400 inside the double-sided adhesive tape area, 2-10 cm away from the outermost edge of the film attachment area, and a circle is attached.

[0056] The PDLC dimming film 100 inside the support bar does not contact the glass 400, and inert gas can be filled into the sealed cavity between the PDLC dimming film 100 and the glass 400 to increase the heat insulation performance of the direct bonding PDLC film structure.

[0057] By setting the air valve on the direct bonding PDLC film structure, the following multiple ways can be used to fill and exhaust gas into the sealed cavity between the PDLC dimming film 100 and the glass 400.

[0058] Method one: The air valve is set on the PDLC dimming film 100, and the air valve is a one-way valve made according to the principle of reverse sealing according to air pressure.

[0059] Method two: Please refer to Figure 4 , multiple air outlets 310 are arranged at intervals in the support 300, the initial section of the support 300 protrudes from the bonding area and is provided with an air inlet 320, and the end section of the support 300 is provided with an air outlet 330. The air inlet 320 is used to introduce inert gas into the sealed cavity, the air outlet 310 is used to exhaust the introduced inert gas, and the air outlet 330 is used to exhaust the excess gas in the sealed cavity.

[0060] In this way, the air inlet valve and the air outlet valve are arranged on both sides of the PDLC dimming film 100. The air inlet valve uses the hollow support bar as a conductor, multiple air outlets 310 are arranged on the support bar, the initial section of the support bar protrudes from the bonding area, a breakable notch is arranged on the support bar inside the double-sided adhesive tape, and the notch extends to the outside of the support bar without setting the back adhesive. After the PDLC dimming film 100 is bonded, the position of the air outlet 310 is not sealed, inert gas is introduced through the air inlet 320 on the support bar, the inert gas is exhausted through the air outlet 310 on the support bar, the excess gas in the sealed cavity is exhausted through the air outlet 330, and whether to stop filling is determined according to the inert gas concentration of the air outlet 330. After stopping filling, the support bar is broken at the notch by force, and the PDLC dimming film 100 at the broken part is bonded to the double-sided adhesive tape.

[0061] Method three: The air inlet and the air outlet are arranged at opposite corners of the PDLC dimming film 100. Two holes are arranged at opposite corners of the PDLC dimming film 100, one hole is provided with an air inlet, the air inlet is provided with a one-way check valve, and the PDLC dimming film 100 can be filled with gas. After the filling stops, the air in the PDLC dimming film 100 cannot overflow from the air inlet. The other hole is provided with a controllable air outlet, and the air outlet is also provided with a one-way check valve to realize the one-way outflow of gas from the PDLC dimming film 100.

[0062] The direct pasting PDLC film structure provided in the application can paste the PDLC dimming film 100 on the glass 400 with a double curved surface, and solves the problem that the existing direct pasting film cannot be pasted on the glass 400 with a double curved surface. In addition, the application can fill inert gas between the PDLC dimming film 100 and the glass 400, and can increase the heat insulation performance of the pasted film glass 400.

[0063] Embodiment two

[0064] The embodiment of the application provides a PDLC dimming film pasting method. Specifically, the front end of the PDLC dimming film 100 is first pasted, the second side release film of the front end double-sided adhesive is torn off, the pasting line of the pasting area is aligned, the PDLC dimming film 100 is pulled and supported left and right, two people cooperate to pull and flatten the whole, and the PDLC dimming film 100 is pasted on the glass 400 through the front end double-sided adhesive from the middle to the two sides. The rear end is pasted, the second side release film of the rear end double-sided adhesive is torn off, the pasting line of the pasting area is aligned, the PDLC dimming film 100 is pulled and supported left and right, two people cooperate to pull and flatten the whole, and the film is pasted on the glass 400 through the rear end double-sided adhesive from the middle to the two sides. Finally, the second side release film of the double-sided adhesive on the two sides is torn off, and the film is pressed together left and right. After pasting is completed, the closed cavity between the PDLC dimming film 100 and the glass 400 is filled with gas and deflated, inert gas is filled into the closed cavity, and then a part of the gas in the closed cavity is extracted, so that the closed cavity maintains a certain degree of vacuum. The pasting paper matched with the pasting scene can also be used to cover the edges of the PDLC dimming film 100 and the support strips, and the aesthetic feeling after pasting is increased.

[0065] The PDLC dimming film pasting method can not only be applied to sunroof glass, but also can be applied to other products such as partitions and glass curtain walls.

[0066] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A direct-lit PDLC film structure, characterized by, The application relates to a direct-adhesion PDLC film structure, which comprises the following components: a PDLC dimming film, an adhesive member arranged on the circumferential edge of the PDLC dimming film, and a support member arranged between the PDLC dimming film and glass in a circumferential direction. The PDLC dimming film acts on the support member to make the support member produce different deformations at different positions, and a closed cavity is formed between the PDLC dimming film and the glass. The support member is arranged on the adhesive member, or the support member is arranged on the circumferential edge of the adhesive member. The support member is provided with a plurality of air outlet holes in a spaced manner, the initial section of the support member extends out of the bonding area and is provided with an air inlet port, the tail section of the support member is provided with an air outlet port, the air inlet port is used for introducing inert gas into the closed cavity, the air outlet holes are used for discharging the introduced inert gas, and the air outlet port is used for discharging the excess gas in the closed cavity.

2. The direct-adhesion PDLC film structure according to claim 1, wherein the support member is a support strip made of silica gel or acrylic material, and the height of the support strip ranges from 1 mm to 10 mm.

3. The direct-adhesion PDLC film structure according to any one of claims 1-2, wherein one side of the adhesive member is attached to the PDLC dimming film, and the other side of the adhesive member is used for attaching the PDLC dimming film to the glass.

4. The direct-adhesion PDLC film structure according to claim 3, wherein the outer edge of the adhesive member coincides with the outer edge of the PDLC dimming film.

5. The direct-adhesion PDLC film structure according to claim 4, wherein the adhesive member is double-sided adhesive tape, and the double-sided adhesive tape is made of OCA adhesive, silica gel or foam double-sided adhesive tape.

6. The direct-adhesion PDLC film structure according to claim 5, wherein the width of the double-sided adhesive tape ranges from 2 cm to 20 cm, and the peeling force of the double-sided adhesive tape is greater than 1000 gf / 25 mm. ​ ​ ​ ​ ​ ​

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