Direct pasting type PDLC film structure and automobile skylight

Abstract

The utility model relates to the technical field of PDLC (Polymer Dispersed Liquid Crystal) dimming films, in particular to a directly-attached PDLC film structure and an automobile skylight. The direct pasting type PDLC film structure comprises a PDLC film, an adhesive part and a film drawing part, the adhesive part is pasted on the inner circumferential edge of the PDLC film, the PDLC film is pasted on glass through the adhesive part, one end of the film drawing part is pasted in the PDLC film, the other end of the film drawing part extends out of the PDLC film, and the film drawing part and the adhesive part are arranged at an angle; a sealed cavity is formed between the PDLC film and the glass and is of a vacuum structure. According to the direct-pasting type PDLC film structure, the problem that a traditional direct-pasting type PDLC dimming film with the whole face being back-glued cannot be pasted on double-curved-surface glass is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of PDLC dimming films, in particular to a direct-attachment PDLC film structure and a car sunroof. Background Art

[0002] With the rapid development of new energy vehicles, the contradiction between battery space demand and driver and passenger space demand has become increasingly obvious. The traditional mobile car sunroof that takes up space has been gradually replaced by an integrated glass skylight. The large panoramic skylight provides passengers with a sense of open space, but also brings problems such as sunshade and heat insulation. When the PDLC dimming film is attached to the sunroof glass, the PDLC dimming film becomes transparent when the power is on, and you can enjoy the same experience as a simple skylight glass. When the power is off, the PDLC dimming film becomes foggy, which can solve the problems of sunshade and heat insulation for the driver and passengers.

[0003] The existing self-adhesive or direct-adhesive PDLC dimming film used for sticking on glass is a full-surface film with adhesive backing or full-surface film with AB adhesive. This type of PDLC dimming film can be attached to flat glass, but it is difficult to stick to the glass of the car sunroof or skylight. The reason is that the glass of the car sunroof or skylight is a double-curved glass. The flat PDLC dimming film attached to the double-curved glass will inevitably produce wrinkles, and bubbles will be generated under long-term sunlight, and the heat insulation effect is poor. Utility Model Content

[0004] The utility model aims to provide a direct-attach PDLC film structure and a car sunroof to alleviate the problem that a conventional direct-attach PDLC dimming film with a whole-surface adhesive backing cannot be attached to a hyperbolic glass.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] In a first aspect, the utility model provides a direct-attachment PDLC film structure, comprising: a PDLC film, an adhesive member and a film-drawing member, wherein the adhesive member is attached to the inner circumferential edge of the PDLC film, the PDLC film is attached to the glass through the adhesive member, one end of the film-drawing member is attached to the inside of the PDLC film, and the other end extends to the outside of the PDLC film, and the film-drawing member is arranged at an angle to the adhesive member;

[0007] A sealed cavity is formed between the PDLC film and the glass, and the cavity has a vacuum structure.

[0008] Furthermore, the adhesive member includes a double-sided adhesive tape, which is formed by die cutting or laser cutting, and the shape of the double-sided adhesive tape is adapted to the adhesive bonding area of ​​the inner circumferential edge of the PDLC film.

[0009] Furthermore, the double-sided adhesive tape is provided in plurality, and the plurality of double-sided adhesive tapes are attached to the inner circumferential edge of the PDLC film by splicing, and the splicing portions have an overlapping structure.

[0010] Furthermore, the double-sided adhesive tape is provided with air holes, and the vacuum structure is formed by evacuating air from the air holes.

[0011] Furthermore, the thickness of the double-sided tape ranges from 0.5 to 3 mm, and the width ranges from 10 to 30 mm.

[0012] Furthermore, the 90-degree peel force of the double-sided adhesive is greater than 20N / cm, and the dynamic shear force is greater than 300N / 6.54cm.

[0013] Furthermore, a positioning mark is provided on the first side of the PDLC film.

[0014] Furthermore, the film-drawing member includes a film-drawing tape, and the film-drawing tape is arranged on the second side, the third side and the fourth side of the PDLC film, the first side is opposite to the third side, and the second side is opposite to the fourth side.

[0015] Furthermore, an electrode is disposed on the third side of the PDLC film.

[0016] In a second aspect, the utility model provides a car sunroof, comprising the direct-attach PDLC film structure described in the first aspect.

[0017] The utility model brings at least the following beneficial effects:

[0018] The utility model provides a direct-attachment PDLC film structure, comprising: a PDLC film, an adhesive component and a film-pulling component, wherein the adhesive component is attached to the inner circumferential edge of the PDLC film, the PDLC film is attached to the glass through the adhesive component, one end of the film-pulling component is attached to the inside of the PDLC film, and the other end extends to the outside of the PDLC film, and the film-pulling component is arranged at an angle to the adhesive component; a sealed cavity is formed between the PDLC film and the glass, and the cavity has a vacuum structure.

[0019] The PDLC film is adhered to the glass through an adhesive piece attached to the inner circumferential edge. During the bonding process, since the edge of the PDLC film is tightly attached to the edge of the glass, it is difficult to pull it hard. If the film is not pulled or the pulling force is uneven, the surface of the PDLC film will not be straightened or wrinkled. The setting of the film-pulling piece allows the PDLC film to be pulled so that the PDLC film can be tightened and pressed to fit without wrinkling. The sealed cavity between the PDLC film and the glass has a vacuum structure. On the one hand, it solves the problem that wrinkles may occur when the PDLC film is completely attached to the surface of the hyperbolic glass. On the other hand, the setting of the vacuum layer has a better heat insulation effect than directly attaching it to the glass surface or not attaching the film. The direct-attached PDLC film structure can meet the bonding requirements of hyperbolic glass, and it has a simple structure and high bonding efficiency.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of a direct-attach PDLC film structure provided in Example 1 of the utility model;

[0023] Figure 2 Schematic diagram of the double-sided tape provided in the first embodiment of the utility model Figure 1 ;

[0024] Figure 3 Schematic diagram of the double-sided tape provided in the first embodiment of the utility model Figure 2 ;

[0025] Figure 4 Schematic diagram of the double-sided tape provided in the first embodiment of the utility model Figure 3 .

[0026] icon:

[0027] 100-PDLC film; 110-positioning mark; 120-electrode; 200-double-sided tape; 210-overlapping structure; 220-pores; 300-film drawing piece. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] Embodiment 1

[0035] The existing self-adhesive or direct-adhesive PDLC dimming film used for sticking on glass is a full-surface film with adhesive backing or full-surface film with AB adhesive. This type of PDLC dimming film can be attached to flat glass, but it is difficult to stick to the glass of the car sunroof or skylight. The reason is that the glass of the car sunroof or skylight is a double-curved glass. The flat PDLC dimming film attached to the double-curved glass will inevitably produce wrinkles, and bubbles will be generated under long-term sunlight, and the heat insulation effect is poor.

[0036] In view of this, an embodiment of the utility model provides a direct-attached PDLC film structure, including: a PDLC film 100, an adhesive part and a film-pulling part 300, the adhesive part is attached to the inner circumferential edge of the PDLC film 100, the PDLC film 100 is attached to the glass through the adhesive part, one end of the film-pulling part 300 is attached to the inside of the PDLC film 100, and the other end extends to the outside of the PDLC film 100, and the film-pulling part 300 is set at an angle to the adhesive part; a sealed cavity is formed between the PDLC film 100 and the glass, and the cavity has a vacuum structure.

[0037] The PDLC film 100 is adhered to the glass through an adhesive member attached to the inner circumferential edge. During the bonding process, since the edge of the PDLC film 100 is tightly attached to the edge of the glass, it is difficult to pull it hard. If the film is not pulled or the pulling force is uneven, the surface of the PDLC film 100 will not be straightened or wrinkled. The setting of the film pulling member 300 can make it possible to perform a film pulling operation on the PDLC film 100, so that the PDLC film 100 can be tightened and pressed to fit without wrinkling. The sealed cavity between the PDLC film 100 and the glass has a vacuum structure. On the one hand, it solves the problem that the PDLC film 100 may produce wrinkles when it is completely attached to the surface of the hyperbolic glass. On the other hand, the setting of the vacuum layer has a better heat insulation effect than directly attaching it to the glass surface or not attaching the film. The direct-attached PDLC film structure can meet the bonding requirements of hyperbolic glass, and has a simple structure and high bonding efficiency.

[0038] In an optional manner of this embodiment, the adhesive member includes a double-sided adhesive tape 200 , which is formed by die cutting or laser cutting, and the shape of the double-sided adhesive tape 200 is adapted to the adhesive bonding area of ​​the inner circumferential edge of the PDLC film 100 .

[0039] Since the four corners of the automobile sunroof glass are mostly chamfered, conventional adhesive tapes will wrinkle when sticking to the corners, thus causing problems such as air leakage. The double-sided adhesive tape 200 of this embodiment is cut into a shape of the double-sided adhesive tape 200 that matches the adhesive sticking area of ​​the inner circumferential edge of the PDLC film 100 by die cutting or laser cutting on the large-width double-sided adhesive tape 200, which can well solve the wrinkle air leakage problem.

[0040] Furthermore, a plurality of double-sided adhesive tapes 200 are provided, and the plurality of double-sided adhesive tapes 200 are attached to the inner circumferential edge of the PDLC film 100 by splicing, and an overlapping structure 210 is formed at the splicing position.

[0041] See also Figure 2 , Figure 3 and Figure 4 The overlapping structure 210 at the joint can be arranged in a variety of ways, such as Figure 2 The stepped structure shown can also be Figure 3 The sawtooth structure shown can also be Figure 4 After die cutting or laser cutting, multiple double-sided adhesive tapes 200 are attached to the periphery of the PDLC film 100 by splicing, and the arrangement of the overlapping structure 210 ensures good airtightness.

[0042] Furthermore, the double-sided adhesive tape 200 is provided with air holes 220 , and a vacuum structure is formed by evacuating air from the air holes 220 .

[0043] See also Figure 1 and Figure 2 , use a puncher to punch a pore 220 of about 4 mm in size on the double-sided tape 200, cut off the pore 220 during die cutting or laser cutting, and after the PDLC film 100 is attached to the glass, extend a fine needle from here into the cavity to evacuate until the PDLC film 100 is tight and there is no sense of relaxation, and it does not need to be completely attached to the glass surface. After the vacuum is exhausted, the fine needle is pulled out and the double-sided tape 200 of the same size as the pore 220 that was cut off by the die is attached again, press the place where the fine needle passes through to make the double-sided tape 200 adhere, and block the pore 220, press and fit to ensure the airtightness of the cavity. On the one hand, the vacuum structure solves the problem of wrinkles that may be caused by the PDLC film 100 being completely attached to the surface of the hyperbolic glass, and on the other hand, it has a better heat insulation effect than directly attaching to the glass surface or not attaching the film.

[0044] It should be noted that the thickness of the double-sided adhesive 200 ranges from 0.5 to 3 mm, and can be specifically set to values ​​such as 0.5 mm, 1 mm, 2 mm, and 3 mm. The width of the double-sided adhesive 200 ranges from 10 to 30 mm, and can be specifically set to values ​​such as 10 mm, 20 mm, and 30 mm. The 90-degree peeling force of the double-sided adhesive 200 is greater than 20 N / cm, and can be specifically set to values ​​such as 25 N / cm, 28 N / cm, and 30 N / cm. The dynamic shear force of the double-sided adhesive 200 is greater than 300 N / 6.54 cm, and can be specifically set to values ​​such as 310 N / 6.54 cm, 320 N / 6.54 cm, and 330 N / 6.54 cm.

[0045] In an optional manner of this embodiment, a positioning mark 110 is disposed on a first side of the PDLC film 100 , and an electrode 120 is disposed on a third side of the PDLC film 100 .

[0046] See also Figure 1 The positioning mark 110 is disposed on the first side of the PDLC film 100, and is used to align with the mark in the vehicle to determine the position of the PDLC film 100. The electrode 120 is disposed on the third side of the PDLC film 100, and is used to energize the PDLC film 100.

[0047] In an optional manner of this embodiment, the film drawing member 300 includes a film drawing tape, which is arranged on the second side, the third side and the fourth side of the PDLC film 100, the first side is opposite to the third side, and the second side is opposite to the fourth side.

[0048] See also Figure 1 Two film-drawing tapes are respectively arranged on the second side, the third side and the fourth side of the PDLC film 100, and the film-drawing tapes can be used to draw the PDLC film 100, so that the PDLC film 100 can be tightened and pressed to fit without generating wrinkles.

[0049] The bonding method of the direct-attach PDLC film structure of this embodiment is as follows:

[0050] First, tear off the release film on one side of the double-sided adhesive 200, and stick it on the adhesive area of ​​the PDLC film 100 according to the position, and keep the release film on the other side as it is. Then fix the side of the PDLC film 100 without the double-sided adhesive 200 on the alignment board to facilitate the lifting and alignment of the entire film when it is attached to the actual vehicle. Tear off the release film of the double-sided adhesive 200 on the side with the positioning mark 110, lift the PDLC film 100 to the vicinity of the glass through the alignment board, and align the positioning mark 110 with the in-vehicle mark to determine the position of the film. When attaching, first press the double-sided adhesive 200 at the positioning mark 110 to attach it to the glass, adhere the first double-sided adhesive 200 to the glass from the middle to both sides, and then remove the alignment board. Then remove the release film on the double-sided adhesive 200 on the opposite side, find the positioning mark 110 on the opposite side, tighten the PDLC film 100, and attach the double-sided adhesive 200 from the middle to both sides. Finally, the double-sided adhesive 200 release films on the left and right sides are removed, and the PDLC film 100 is tightened and pressed to fit. Finally, a vacuum operation is performed.

[0051] The direct-attach PDLC film structure can solve the problem that the traditional direct-attach PDLC film 100 with adhesive on the entire surface cannot be attached to the double-curved glass. It has a simple structure and a simple bonding process, and can achieve rapid bonding of the curved glass.

[0052] Embodiment 2

[0053] This embodiment provides a car sunroof, including the direct-attach PDLC film structure of the first embodiment.

[0054] By conducting a heat insulation test, the test device is used to simulate the temperature change inside the car. The PDLC film 100 is set on the lower surface of the glass, and the upper surface of the glass is illuminated by a light. The glass is placed above a sealed black box. The temperature of the lower surface of the box is tested to simulate the temperature of a person's head. The test results are shown in the following table.

[0055]

[0056] As can be seen from the above table, the automobile sunroof glass has the best heat insulation effect when the PDLC film 100 is glued on all sides.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A direct-attach PDLC film structure, characterized in that: include: A PDLC film, an adhesive member and a film-drawing member, wherein the adhesive member is attached to the inner circumferential edge of the PDLC film, the PDLC film is attached to the glass through the adhesive member, one end of the film-drawing member is attached to the inside of the PDLC film, and the other end extends to the outside of the PDLC film, and the film-drawing member is arranged at an angle to the adhesive member; A sealed cavity is formed between the PDLC film and the glass, and the cavity has a vacuum structure.

2. The direct-attach PDLC film structure according to claim 1, characterized in that: The adhesive member includes a double-sided adhesive tape, which is formed by die cutting or laser cutting, and the shape of the double-sided adhesive tape is adapted to the adhesive bonding area of ​​the inner circumferential edge of the PDLC film.

3. The direct-attach PDLC film structure according to claim 2, characterized in that: A plurality of double-sided adhesive tapes are provided, and the plurality of double-sided adhesive tapes are attached to the inner circumferential edge of the PDLC film by splicing, and the splicing portions have an overlapping structure.

4. The direct-attach PDLC film structure according to claim 3, characterized in that: The double-sided adhesive tape is provided with air holes, and the vacuum structure is formed by evacuating air from the air holes.

5. The direct-attach PDLC film structure according to claim 2, characterized in that: The thickness of the double-sided adhesive tape is in the range of 0.5-3 mm, and the width is in the range of 10-30 mm.

6. The direct-attach PDLC film structure according to claim 5, characterized in that: The 90-degree peeling force of the double-sided adhesive is greater than 20 N / cm, and the dynamic shearing force is greater than 300 N / 6.54 cm.

7. The direct-attach PDLC film structure according to claim 1, characterized in that: A positioning mark is arranged on the first side of the PDLC film.

8. The direct-attach PDLC film structure according to claim 7, characterized in that: The film-drawing member includes a film-drawing tape, which is arranged on the second side, the third side and the fourth side of the PDLC film, the first side is opposite to the third side, and the second side is opposite to the fourth side.

9. The direct-attach PDLC film structure according to claim 8, characterized in that: An electrode is disposed on the third side of the PDLC film.

10. A car sunroof, characterized in that: It comprises the direct-attached PDLC film structure as described in any one of claims 1 to 9.

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