CN112677573A - Flexible intermediate film and laminated glass - Google Patents
Flexible intermediate film and laminated glass Download PDFInfo
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- CN112677573A CN112677573A CN202011420059.8A CN202011420059A CN112677573A CN 112677573 A CN112677573 A CN 112677573A CN 202011420059 A CN202011420059 A CN 202011420059A CN 112677573 A CN112677573 A CN 112677573A
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Abstract
The invention provides a flexible intermediate film, which structurally comprises at least one first organic polymer layer and is characterized in that each corner of the periphery of the flexible intermediate film is provided with at least one angular notch, each angular notch is arranged on the whole flexible intermediate film or one first organic polymer layer, each angular notch is provided with a first edge and a second edge, each first edge and each second edge form an included angle, and chamfers are arranged in the directions of the first edges and the second edges, which are close to the outer sides of the flexible intermediate film. The notches are formed in the corners of the flexible middle film, so that wrinkles of the flexible middle film when the flexible middle film is laminated on the surface of the large-curvature glass can be reduced or even eliminated, and the wrinkles are not easy to appear due to shrinkage in the process of the interlayer technology.
Description
The technical field is as follows:
the invention relates to the field of laminated glass, in particular to a flexible intermediate film and laminated glass.
Background art:
as the kinds of functional glass are increasing, the functions of the interlayer film added to the glass are also diversified. In the field of automobile glass, because the automobile glass generally has a certain radian, most of intermediate films in the automobile glass are flexible intermediate films and can be attached to the surface of the glass so as to be matched with the glass with different curvatures.
Common flexible intermediate films such as PDLC films, SPD films, EC films, LC films, and heat conductive films, etc. These flexible intermediate films are all sheet-like layers having a small thickness, and almost all use transparent and stable organic polymer substrate layers such as PET, PC, PI, and the like.
Most of automobile glass has a certain curvature, and especially, automobile glass skylights tend to be larger and larger, and the curvature of the automobile glass inevitably increases with the increase of the area of the skylight glass. The flexible intermediate films are sheet-shaped flexible films with small thickness, when the flexible intermediate films are stacked and paved on a curved surface of glass with large curvature, the existence of the curved surface can inevitably cause the flexible intermediate films to have a wrinkle phenomenon in certain areas close to edges, and meanwhile, the high temperature and high pressure of the automobile glass interlayer process cause the flexible intermediate films to shrink, so that the wrinkle phenomenon is further aggravated. The presence of wrinkles in portions where they occur affects the performance of the flexible intermediate film, and wrinkles are visible to the naked eye and unacceptable to the user.
The invention content is as follows:
the invention provides a flexible intermediate film and laminated glass aiming at the technical problems in the prior art, wherein the flexible intermediate film and the laminated glass are provided with specific notches, so that the problem of wrinkles applied to the glass with large curvature is solved, and the laminated glass comprising the flexible intermediate film is also provided.
The technical scheme adopted by the invention is as follows:
the invention provides a flexible intermediate film, which structurally comprises at least one first organic polymer layer and is characterized in that each corner of the periphery of the flexible intermediate film is provided with at least one angular notch, each angular notch is arranged on the whole flexible intermediate film or one first organic polymer layer, each angular notch is provided with a first edge and a second edge, each first edge and each second edge form an included angle, and chamfers are arranged in the directions of the first edges and the second edges, which are close to the outer sides of the flexible intermediate film.
In one possible embodiment, the included angle is between 10 ° and 70 °.
In a possible embodiment, the radius R of the chamfer is greater than 5 mm.
In a possible embodiment, the flexible intermediate film further comprises rectangular notches at the side edge portions.
In a possible implementation mode, the central line position of the rectangular notch is located within 42% -50% of the total length of the edge part, the depth of the rectangular notch is 50-400mm, and four right angles of the rectangular notch are provided with chamfers.
In a possible embodiment, the radius R of the chamfer is greater than 5 mm.
In one possible embodiment, one of the at least one first organic polymer layer has an extension, and the angular notch is located at a corner of the extension.
The invention also provides laminated glass, which is characterized in that any one of the flexible intermediate films is laminated between the first light-transmitting plate and the second light-transmitting plate.
In one possible embodiment, the first and second light-transmitting plates are curved glass having a radius of curvature of < 1000 mm.
In one possible embodiment, the periphery of the surface of the laminated glass is provided with an ink printing area, and the ink printing area covers the notch of the edge part of the flexible intermediate film.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
notches are formed at the corners of the flexible middle film, so that wrinkles of the flexible middle film when the flexible middle film is laminated on the surface of the large-curvature glass are reduced or even eliminated. When the degree of the wrinkles is serious, a rectangular notch can be formed on the edge. The laminated glass prepared by using the flexible intermediate film with the notch can obtain a laminated glass product with good appearance, no folds are generated after the high temperature and high pressure of the laminating process, and the notch opening scheme is suitable for most laminated glasses with different curvatures.
Description of the drawings:
FIG. 1 is a schematic view of a notch formed in a flexible intermediate film according to the present invention;
FIG. 2 illustrates a flexible intermediate film having extended sections according to the present invention;
FIG. 3 is a schematic view of a laminated glass comprising a flexible interlayer film according to the present invention;
FIG. 4 is a schematic representation of a laminated glass of the present invention after printing the ink printing area.
Description of reference numerals:
1. the flexible light-transmitting plate comprises a first organic polymer layer, a second organic polymer layer, a functional material layer, a first organic polymer layer, a second organic polymer layer, a first light-transmitting plate, a second light-transmitting plate, a first bonding layer, a second bonding layer, an ink printing layer, a flexible middle layer and a second bonding layer, wherein the first organic polymer layer 2, the functional material layer 3, the second organic polymer layer 4, the first light-transmitting plate 5;
11. corner notch, 111, first side, 112, second side, 12, rectangular notch, 13, extension.
The specific implementation mode is as follows:
to explain technical contents, achieved objects and effects of the present invention in detail, the present invention will be further described with reference to the accompanying drawings and embodiments, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
In the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are primarily intended to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation, and therefore should not be construed as limiting the invention.
As shown in fig. 1, a flexible intermediate film 100 structurally includes at least one first organic polymer layer 1, and is characterized in that each corner portion of the flexible intermediate film 100 is provided with at least one angular notch 11, the angular notch 11 is provided on the whole flexible intermediate film 100 or one first organic polymer layer 1, the angular notch 11 has a first edge 111 and a second edge 112, the first edge 111 and the second edge 112 form an included angle, and a chamfer is provided in a direction in which the first edge 111 and the second edge 112 are close to the outer side of the flexible intermediate film 100.
The type of the flexible intermediate film 100 is not limited, and includes various functional films with at least one first organic polymer layer 1-bit substrate, including but not limited to: a metal mesh grid film of metal wires is arranged on the first organic polymer layer 1; a composite film of functional material such as PDLC light-adjusting film is added between two organic polymer layers. The above are examples of the flexible intermediate film 100 of the present invention, and the flexible intermediate film 100 is a thin sheet-like material, which is generally polygonal, and the first organic polymer layer 1 is preferably a PET film, and may be a material similar to those used in general applications such as PI, and has good flexibility. When the film is laid flat, the film can be smoothly stretched without wrinkle, and when the film is used as a functional layer in the middle of laminated glass and is introduced into automobile laminated glass, particularly the application scene of the largest functional glass such as an automobile skylight, the automobile glass generally has certain curvature, and the local curvature of the skylight glass can reach a very large value. The flexible interlayer film 100 is laminated as an interlayer and attached to the surface of the curved glass, and the curved glass has the same curvature, and wrinkles are generated at a position (generally, an edge portion) where the curvature of the glass is large, and the high temperature and high pressure of the automobile glass laminating process causes the flexible interlayer film 100 to shrink, thereby further increasing the phenomenon of wrinkles. The performance of the partially flexible center film 100 where the wrinkles occur is affected and the wrinkles are visible to the naked eye and unacceptable to the user.
When the angular notch 11 is opened on the whole flexible intermediate film 100, the angular notch 11 penetrates through all the structural layers of the whole flexible intermediate film 100; in the case where the angular gap 11 is opened in one layer of the first organic polymer layer 1, the flexible intermediate film 100 generally has a plurality of organic polymer layers.
In the embodiment shown in fig. 2, the flexible intermediate film 100 has a first organic polymer layer 1, a second organic polymer layer 3, and a functional material layer 2 located between the first organic polymer layer 1 and the second polymer layer 3, the first organic polymer layer 1 has an extension section 13 extending beyond other structural layers, an angular notch 1 is opened in the extension section 13, the functional area of the main body is not affected, and due to the presence of the extension section 13, a wrinkle can be guided to a position close to the edge of the extension section 13. In this case, the corners can be notched more easily.
Of course, in another embodiment, the flexible intermediate film 100 may also have only a single first organic polymer layer 1, the functional material layer is disposed on the first organic polymer layer 1, the first organic polymer layer 1 has an extension section 13 extending beyond the functional material disposition region around the extension section 13, that is, the functional material is not disposed on the extension section 13, and the angular gap 11 is opened in the extension section 13 region.
The notch is formed, so that the force for mutually extruding to form the folds is released, and meanwhile, the space is reserved, so that the folds cannot appear due to shrinkage extrusion when the high-temperature high-pressure process is carried out.
The included angle formed by the first side 111 and the second side 112 of the angular gap 11 is 10 ° to 70 °, and particularly, a preferable angle is 10 °, 40 °, and 70 °. With a suitable angle to better solve the problem of wrinkles.
The radius R of the chamfer formed in the direction in which the first side 111 and the second side 112 of the angular notch 11 are close to the outer side of the flexible intermediate film 100 is greater than 5mm, and specifically, preferable angles are 5mm, 8mm, 10mm, 15mm, 20mm, and 25 mm. The arrangement of a certain chamfer angle can better release the mutual extrusion force of the fold positions, and the fold problem is better solved.
In one embodiment, the flexible middle film 100 further includes a rectangular notch 12 at the side edge portion, and further, the center line position of the rectangular notch 12 is located within 42% -50% of the total length of the side edge portion, i.e., L in fig. 1 is 42% -50% of the total length of the side edge, specifically 42%, 45%, 50%, which is the position most prone to wrinkle. The depth of the rectangular notch 12 is 50-400mm, specifically can be 50mm, 100mm, 200mm, 300mm, 350mm, 400mm, four right angles of the rectangular notch 12 are provided with chamfers, the radius R of the chamfers is greater than 5mm, and specifically can be preferred angles of 5mm, 8mm, 10mm, 15mm, 20mm, 25 mm.
According to the characteristic that the organic polymer layer in a film shape shrinks under heat, the gap area needs to provide a large enough space to provide a sufficient extending space, and the right-angle corner formed by the rectangular gap 12 is the position with the maximum shrinking degree in high temperature and high pressure, so that the chamfer is designed at the right-angle position, the organic polymer layer has a sufficient extending space in the heat receiving process, and the risk of generating wrinkles is reduced.
The invention also provides laminated glass, which comprises a first transparent plate 4 and a second transparent plate 5 which are laminated, and is characterized in that the flexible middle film 100 is laminated between the first transparent plate 4 and the second transparent plate 5.
Taking the laminated glass as an example, the glass product of 100 including the flexible intermediate film may of course be a hollow structure. The functional glass of the hollow structure has too large thickness, and the use scene is limited.
As shown in fig. 3, which is a typical laminated glass structure, in the embodiment of the laminated glass, the flexible middle 100 is combined with the first light-transmitting plate 4 and the second light-transmitting plate 5 through the first bonding layer 6 and the second bonding layer 7, respectively, and the process method of the laminated glass is a well-established process in the glass industry.
The first light-transmitting plate 4 and the second light-transmitting plate 5 are preferably made of conventional glass, and can be single-piece common glass or toughened glass, or laminated glass, or organic glass. In one embodiment, at least one of the first transparent plate 4 and the second transparent plate 5 is made of a dark transparent material, and the transmittance of the transparent plate using the dark transparent material is less than 20%, and the color is usually black or gray, so as to reduce the transmittance of the whole light-adjusting glass. In another embodiment, at least one of the first adhesive layer 6 and the second adhesive layer 7 is a dark colored adhesive material having a transmittance of less than 20%, and is typically black or gray in color.
All the adhesive layers mentioned in the invention are made of organic materials used in the common laminated glass process, such as PVB, EVA, POB and the like, and the application of the adhesive materials in the glass industry is mature and is not described any more.
The first light-transmitting plate 5 and the second light-transmitting plate 6 are curved glass, and the curvature radius of the curved glass is less than 1000 mm. The curved glass satisfying the curvature radius formula is easy to generate wrinkles. Since the automotive glass is a variable curvature glass, the curvature near the edge of the glass is usually large, so that the local curvature radius of the edge is more likely to satisfy the above formula, and wrinkles are likely to occur in the laying or high-temperature and high-pressure process.
As shown in fig. 4, the periphery of the surface of the laminated glass is provided with an ink printing area 8, and the ink printing area 8 covers the notch of the edge of the flexible middle film 100.
In addition to the above-mentioned glass of the sandwich structure, the flexible intermediate film 100 may be applied to glass of a hollow structure to form a glass product of a hollow structure. The process of the hollow glass is also quite mature, the flexible intermediate film 100 is easier to compound into the hollow glass, the preparation process is simple, but the hollow glass is limited by the thickness, the curvature and the like, so that the hollow glass is less applied to the application, particularly the common automobile, and the hollow glass is a better product structure in the use occasions such as building glass curtain walls and the like which are not sensitive to the thickness.
The above description is intended to provide preferred embodiments of the present invention, and not to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions and substitutions which can be made by those skilled in the art within the spirit and scope of the present invention are also within the scope of the present invention.
Claims (10)
1. The utility model provides a flexible intermediate film, its structure includes at least one deck first organic polymer layer (1), its characterized in that, flexible intermediate film is seted up at every bight all around at least one angular gap (11), angular gap (11) are seted up on flexible intermediate film's whole or one deck first organic polymer layer (1), angular gap (11) have first limit (111) and second limit (112), first limit (111) and second limit (112) form the contained angle, first limit (111) with second limit (112) are equipped with the chamfer in the direction that is close to flexible intermediate film (100) outside.
2. A flexible intermediate film as claimed in claim 1, wherein the angle of said included angle is 10 ° to 70 °.
3. A flexible intermediate membrane as claimed in claim 1, characterized in that the radius R of the chamfer is greater than 5 mm.
4. A flexible intermediate film according to claim 1, characterised in that it further comprises rectangular notches (12) in the side edges.
5. The flexible middle membrane according to claim 4, wherein the central line position of the rectangular notch (12) is within 42% -50% of the total length of the edge portion, the depth of the rectangular notch (12) is 50-400mm, and four right angles of the rectangular notch (12) are provided with chamfers.
6. A flexible intermediate membrane as claimed in claim 5, characterized in that the radius R of the chamfer is greater than 5 mm.
7. A flexible intermediate film according to claim 1, wherein one of the at least one first organic polymer layer (1) has an extension (13), and the angular notch (11) is located at a corner of the extension (13).
8. Laminated glass comprising a first light-transmitting plate (4) and a second light-transmitting plate (5) which are laminated, characterized in that a flexible intermediate film according to any one of claims 1-7 is laminated between the first light-transmitting plate (4) and the second light-transmitting plate (5).
9. The laminated glass according to claim 8, wherein the first and second light-transmitting plates (4, 5) are curved glass having a radius of curvature of < 1000 mm.
10. The laminated glass according to claim 8, wherein the periphery of the surface of the laminated glass is provided with an ink printing area (8), and the ink printing area (8) covers the notch of the edge part of the flexible intermediate film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420059.8A CN112677573A (en) | 2020-12-08 | 2020-12-08 | Flexible intermediate film and laminated glass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011420059.8A CN112677573A (en) | 2020-12-08 | 2020-12-08 | Flexible intermediate film and laminated glass |
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| CN112677573A true CN112677573A (en) | 2021-04-20 |
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| CN202011420059.8A Pending CN112677573A (en) | 2020-12-08 | 2020-12-08 | Flexible intermediate film and laminated glass |
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