CN111708200A - PDLC (polymer dispersed liquid crystal) dimming film and edge sealing method thereof - Google Patents
PDLC (polymer dispersed liquid crystal) dimming film and edge sealing method thereof Download PDFInfo
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- CN111708200A CN111708200A CN202010618593.3A CN202010618593A CN111708200A CN 111708200 A CN111708200 A CN 111708200A CN 202010618593 A CN202010618593 A CN 202010618593A CN 111708200 A CN111708200 A CN 111708200A
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- pdlc
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Dispersion Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a PDLC (Polymer dispersed liquid Crystal) light adjusting film and an edge sealing method thereof, which are characterized by comprising the following steps of: inserting a sharp object into the PDLC material layer, and sliding for a circle along the periphery of the light adjusting film to separate the peripheral upper conductive layer from the peripheral lower conductive layer; cleaning PDLC materials in the peripheral separated parts by using a solvent capable of dissolving PDLC, and forming a cavity between the upper conducting layer and the lower conducting layer on the periphery of the light adjusting film; cleaning a polyester film edge sealing material, cutting the polyester film edge sealing material into strips, and inserting the strips into cavities around a light modulation film; and melting the film edge sealing materials in the cavities around the upper substrate layer, the lower substrate layer and the light adjusting film into a whole by using a sealing device with a heating clamping structure. The PDLC light-adjusting film prepared by the method can completely avoid the permeation of the plasticizer, simultaneously improves the bonding strength of the upper and lower basal layers, and prevents PDLC from edge rising in the transportation process or when external force is received.
Description
The technical field is as follows:
the invention relates to the technical field of light adjusting films, in particular to a PDLC (polymer dispersed liquid crystal) light adjusting film used for automobile laminated glass and an edge sealing method thereof.
Background art:
with the improvement of living standard and the acceleration of life rhythm of people, the automobile becomes a necessity of life. The frequency of use of automobiles for activities such as office work, travel, etc. has increased, and people are increasingly demanding on the privacy and comfort functions of automobiles. Along with the improvement of the light adjusting film technology, the light adjusting film and the light adjusting glass formed by combining the glass are produced, and the product can realize the privacy adjustable function by adjusting the light transmittance of the glass through the power-on and power-off. In the field of automobile glass, the automobile dimming glass also has a large market, but the automobile glass has higher standards compared with building glass, so the automobile dimming glass also has higher requirements on corresponding dimming films. Most of the existing automotive light control glass adopts a laminated glass product form, most of the existing adhesive materials in the laminated glass in the automotive industry are PVB (polyvinyl butyral), the PVB contains a plasticizer and a plurality of other small molecular components, the plasticizer can react with a liquid crystal polymer in a PDLC light control film functional layer, the reacted part can become transparent and loses the light control function, the reacted part is gradually increased along with time, generally, the reacted part is inwards expanded from the periphery of the PDLC light control film, and a continuously expanded transparent boundary line is formed at the periphery of the film, so that the application of the light control glass on automobiles, particularly on automobile side windows is hindered.
Currently, in order to solve the problem of the transparent boundary existing in the PDLC dimming film, in the prior art CN201710675277.8, a method of cutting a step at the edge of the PDLC dimming film and then coating edge sealing glue at the step position is adopted to solve the problem. Although the scheme really reduces the problem of the transparent boundary, glue is applied to the half-cut steps, the phenomenon that glue is not uniformly applied due to the action of gravity cannot be avoided, the whole edge sealing area is thin at the top and thick at the bottom, the upper part is relatively weak, and the risk of edge sealing defects is caused; the adhesive surface of the adhesive only has side surfaces and a bottom surface, the adhesive area is small, the adhesion is not firm, and the edge sealing adhesive is easy to debond; PET used for a transparent substrate of the light adjusting film is a low surface energy material, and is not subjected to surface treatment, and the bonding strength of the PET is not high no matter the PET is epoxy resin or polyurethane adhesive; the low-temperature flexibility of the epoxy resin is insufficient, and the epoxy resin is easy to break to cause debonding when the PDLC is transported in a coiled mode. Therefore, the light adjusting film produced by the current edge sealing process still has transparent boundary lines and other defects causing poor edge sealing in practical use.
The invention content is as follows:
aiming at the technical problems in the prior art, the invention provides the PDLC (Polymer dispersed liquid Crystal) light adjusting film and the edge sealing method thereof, so that the PDLC light adjusting film produced by the edge sealing method has good edge sealing, firm bonding of edge sealing materials, good bending resistance and easy implementation of the edge sealing method.
The technical scheme adopted by the invention is as follows:
the edge sealing method of the PDLC (polymer dispersed liquid crystal) light adjusting film comprises an upper basal layer, an upper conducting layer, a PDLC material layer, a lower conducting layer and a lower basal layer from top to bottom in sequence, and is characterized by comprising the following steps of:
step 1: inserting a sharp object into the PDLC material layer, and sliding for a circle along the periphery of the light adjusting film to separate the peripheral upper conductive layer from the peripheral lower conductive layer;
step 2: cleaning PDLC materials in the peripheral separated parts by using a solvent capable of dissolving PDLC, and forming a cavity between the upper conducting layer and the lower conducting layer on the periphery of the light adjusting film;
and step 3: cleaning and cutting the polyester film edge sealing material into strips;
and 4, step 4: inserting the cut film edge sealing material into the cavity around the light adjusting film, wherein the film edge sealing material is tightly close to the PDLC material;
and 5: and melting the film edge sealing materials in the cavities around the upper substrate layer, the lower substrate layer and the light adjusting film into a whole by using a sealing device with a heating clamping structure.
In one possible embodiment, the material used for the upper and lower substrate layers is PET.
In a possible embodiment, the width of the cavity is 5-10 mm.
In one possible embodiment, the film edge banding material is PET or PC.
In one possible embodiment, the film edge banding material overhangs the edges of the light modulating film by 0-5 mm.
In one possible embodiment, the film edge sealing material has a thickness of 20-50 μm.
In one possible embodiment, the solvent used in step 2 in which PDLC can be dissolved is alcohol or acetone.
The invention also provides a PDLC (Polymer dispersed liquid Crystal) light adjusting film which is characterized in that the PDLC light adjusting film is subjected to edge sealing by using any one of the edge sealing methods, and a film edge sealing material is arranged around the edge of a PDLC material layer of the PDLC light adjusting film.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
become a whole with upper and lower stratum basale material and film banding material through the hot melt mode, can avoid the plasticizer infiltration completely, improved the adhesive strength of upper and lower stratum basale simultaneously, prevent that PDLC from playing the limit when the transportation or receive external force.
Description of the drawings:
FIG. 1 is a schematic view of a PDLC light modulation film according to the present invention;
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3
Description of reference numerals:
1. the light-emitting diode comprises an upper base layer, 2, an upper conducting layer, 3, a PDLC material layer, 4, a lower conducting layer, 5, a lower base layer, 6, a film edge sealing material, 100 and a PDLC light adjusting film.
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.
The invention provides an edge sealing method of a PDLC (polymer dispersed liquid crystal) light adjusting film, which sequentially comprises an upper substrate layer 1, an upper conductive layer 2, a PDLC material layer 3, a lower conductive layer 4 and a lower substrate layer 5 from top to bottom, and is characterized by comprising the following steps of:
step 1: inserting a sharp object into the PDLC material layer 3, wherein the sharp object slides along the periphery of the dimming film for a circle to separate the peripheral upper conductive layer 2 and the peripheral lower conductive layer 4, the upper conductive layer 2 is attached to the upper substrate layer 1, and the lower conductive layer 4 is attached to the lower substrate layer 5, so that the lower substrate layer 5 of the upper substrate layer 1 is also separated, and the sharp object is used, such as a knife point of a cutting knife;
step 2: after the upper conductive layer 2 and the lower conductive layer 4 are separated, PDLC materials are inevitably left on the separated parts, the PDLC materials in the four separated parts are cleaned by using a solvent capable of dissolving PDLC, and a cavity is formed between the upper conductive layer 2 and the lower conductive layer 4 on the periphery of the light adjusting film;
and step 3: cleaning and cutting the film edge sealing material 6 into long strips;
and 4, step 4: inserting the cut film edge sealing material 6 into the cavity around the light adjusting film, wherein the film edge sealing material 6 is close to the PDLC material, and a gap between the film edge sealing material 6 and the PDLC material is as small as possible;
and 5: the use has the heating to press from both sides the closing device of tight structure and melts into an organic whole with last stratum basale 1, lower stratum basale 5 and the film of adjusting luminance in the cavity around the membrane 6, the closing device who has the heating to press from both sides tight structure is a prior art, thereby uses the closing device to melt the principle of material and as an organic whole and is sealed to the heating of plastics sack when similar to the shopping.
Usually, before edge sealing, the PDLC light-adjusting film is provided with an extraction electrode (not shown) on the side edge for applying a driving voltage, and the shape and position of the electrode do not affect the implementation of the edge sealing method in the present invention, so detailed description thereof is omitted in the present invention.
The method provided by the invention uses the polyester film edge sealing material instead of glue materials such as polyurethane or epoxy resin in the prior art, does not need curing waiting, and does not worry about uneven thickness of the edge sealing glue due to gravity action in the curing process. The method for heating and sealing the edge is very quick and easy to operate. Become a whole with upper and lower stratum basale material and film banding material 6 through the hot melt mode, can avoid the plasticizer infiltration completely, improved the adhesive strength of upper and lower stratum basale simultaneously, prevent that PDLC from playing the limit when the transportation or receive external force.
As shown in fig. 1-2, which are schematic and sectional views of a PDLC light modulation film 100, the upper substrate layer 1 and the lower substrate layer 5 used in the PLDC light modulation film 100 of the present invention are usually made of PET, which is a well-established technology, and from the problem of the transparent boundary line, technicians can find that the plasticizer in PVB cannot enter the PDLC material layer 3 through PET, so the PET material has a good effect on blocking the plasticizer, and is cheap and has high transparency.
The width of a cavity formed between the upper base layer 1 and the lower base layer 5 at the periphery of the PDLC light adjusting film 100 is 5-10mm, and the cavity with the width is used for accommodating a film edge sealing material 6 to form an edge sealing strip which is enough to block plasticizers entering from the periphery.
The polyester-based film edge banding material 6 used in the present invention is preferably PET or PC, and the commonly used material for the upper and lower substrate layers 1, 5 is PET, which has good plasticizer barrier effect, so PET is preferred as the film edge banding material 6, while PC with similar properties is also a suitable material.
In the invention, the cut long strip-shaped film edge sealing material 6 is plugged into a cavity between the upper substrate layer 1 and the lower substrate layer 5, and the plugged film edge sealing material 6 protrudes out of the periphery of the PDLC light modulation film 100 by 0-5mm, and further preferably by 1-2 mm. The protrusion with a certain length enables the operation of plugging the film edge sealing material 6 into the cavity to be easier, and fine adjustment after plugging is facilitated.
The thickness range of the film edge sealing material 6 is 20-50 mu m, preferably is larger than the thickness of the PDLC material layer 3, and when the thickness of the film edge sealing material 6 is larger than the thickness of the cleaned PDCL material, namely the thickness of the cavity, the upper part and the lower part of the light adjusting film can be stretched, so that the inserted film edge sealing material 6 is more stable.
The solvent used in the present invention, which can dissolve the PDLC, is preferably alcohol or acetone, and the PDLC material is entirely organic, and can be removed well by alcohol or acetone.
The invention also provides a PDLC (Polymer dispersed liquid Crystal) light adjusting film, which is characterized in that the PDLC light adjusting film 100 is subjected to edge sealing by using the edge sealing method in the invention, and a film edge sealing material 6 is arranged around the edge of a PDLC material layer 3 of the PDLC light adjusting film 100.
In the invention, the heating temperature of the sealing device with the heating and clamping structure is 200-250 ℃, the heating time is 10-30s, the heating and clamping structure clamps the edge part of the PDLC light adjusting film 100 inserted into the film edge banding material 6, and the material of the upper substrate layer 1, the material of the lower substrate layer 5 and the film edge banding material 6 are melted by heating to form an integrated edge banding.
The product structure of the PDLC light modulation film has the advantages that:
become an organic whole with upper substrate layer 1 material, lower substrate layer 5 material and film banding material 6 through the hot melt mode, can avoid the plasticizer infiltration completely, improved the adhesive strength of upper and lower substrate layer simultaneously, prevent that PDLC from rising the limit in the transportation or when receiving external force. PDLC peel strength can be measured by experimental testing: 0.01-0.1N/mm (test speed 50mm/min), edge sealing by using polyester materials such as PET, PC and the like, and peeling strength: 1-2N/mm (test speed 50mm/min), the PET reaches the bulk failure strength.
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 (9)
1. The edge sealing method of the PDLC (polymer dispersed liquid crystal) light adjusting film comprises an upper basal layer (1), an upper conducting layer (2), a PDLC material layer (3), a lower conducting layer (4) and a lower basal layer (5) from top to bottom in sequence, and is characterized by comprising the following steps of:
step 1: inserting a sharp object into the PDLC material layer (3), and sliding for a circle along the periphery of the light modulation film to separate the peripheral upper conductive layer (2) and the peripheral lower conductive layer (4);
step 2: cleaning PDLC materials in the peripheral separated parts by using a solvent capable of dissolving PDLC, so that a cavity is formed between the upper conductive layer (2) and the lower conductive layer (4) on the periphery of the light modulation film;
and step 3: cleaning and cutting the polyester film edge sealing material (6) into strips;
and 4, step 4: inserting the cut film edge sealing material (6) into the cavity around the light adjusting film, wherein the film edge sealing material (6) is tightly close to the PDLC material;
and 5: and a sealing device with a heating clamping structure is used for melting the upper substrate layer (1), the lower substrate layer (5) and the film edge sealing material (6) in the cavity around the dimming film into a whole.
2. The edge sealing method of the PDLC light modulation film according to claim 1, wherein the material used for the upper substrate layer (2) and the lower substrate layer (5) is PET.
3. The edge sealing method of the PDLC light adjusting film according to claim 1, wherein the width of the cavity is 5-10 mm.
4. The edge sealing method of the PDLC light adjusting film as claimed in claim 1, wherein said film edge sealing material (6) is PET or PC.
5. The edge sealing method of the PDLC light adjusting film according to claim 1, wherein said film edge sealing material (6) protrudes 0-5mm beyond the edge of the light adjusting film.
6. The edge sealing method of the PDLC light adjusting film as claimed in claim 1, wherein the thickness of said film edge sealing material (6) is 20-50 μm.
7. The edge sealing method of the PDLC light modulation film according to claim 1, wherein the solvent used in step 2 to dissolve PDLC is alcohol or acetone.
8. The edge banding method of PDLC light adjusting film as claimed in claim 1, wherein the heating temperature of the sealing device with heating clamping structure in step 5 is 200-250 ℃ and the heating time is 10-30 s.
9. A PDLC light modulation film, characterized in that said PDLC light modulation film (100) is edge sealed using the edge sealing method according to any one of claims 1-8, and the edge of PDLC material layer (3) of said PDLC light modulation film (100) is provided with a film edge sealing material (6) around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618593.3A CN111708200A (en) | 2020-07-01 | 2020-07-01 | PDLC (polymer dispersed liquid crystal) dimming film and edge sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010618593.3A CN111708200A (en) | 2020-07-01 | 2020-07-01 | PDLC (polymer dispersed liquid crystal) dimming film and edge sealing method thereof |
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| CN111708200A true CN111708200A (en) | 2020-09-25 |
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| CN202010618593.3A Pending CN111708200A (en) | 2020-07-01 | 2020-07-01 | PDLC (polymer dispersed liquid crystal) dimming film and edge sealing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113568210A (en) * | 2021-07-09 | 2021-10-29 | Oppo广东移动通信有限公司 | Light modulation structure, manufacturing method thereof, electronic equipment shell and electronic equipment |
| CN113671744A (en) * | 2021-08-27 | 2021-11-19 | 福耀玻璃(湖北)有限公司 | Edge sealing process of PDLC (polymer dispersed liquid crystal) dimming film for automobile skylight glass |
| WO2022237753A1 (en) * | 2021-05-12 | 2022-11-17 | Saint-Gobain Glass France | Light-adjusting structure, light-adjusting glass and edge sealing process thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022237753A1 (en) * | 2021-05-12 | 2022-11-17 | Saint-Gobain Glass France | Light-adjusting structure, light-adjusting glass and edge sealing process thereof |
| CN113568210A (en) * | 2021-07-09 | 2021-10-29 | Oppo广东移动通信有限公司 | Light modulation structure, manufacturing method thereof, electronic equipment shell and electronic equipment |
| CN113671744A (en) * | 2021-08-27 | 2021-11-19 | 福耀玻璃(湖北)有限公司 | Edge sealing process of PDLC (polymer dispersed liquid crystal) dimming film for automobile skylight glass |
| CN113671744B (en) * | 2021-08-27 | 2023-11-10 | 福耀玻璃(湖北)有限公司 | Edge sealing technology of PDLC dimming film for automobile skylight glass |
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Application publication date: 20200925 |
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