Packaging adhesive film and laminated glass
By using POE, PA-POE copolymer, and PP as the first adhesive layer, and combining them with EVA or PVB as the second adhesive layer, the problems of hydrolysis, delamination, and ion migration in laminated glass in high humidity environments are solved, improving the water resistance and light transmittance of laminated glass, and reducing production costs and haze.
Patent Information
- Application Number
- CN202520151878.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-22
AI Technical Summary
In the existing technology, EVA film is prone to hydrolysis and corrosion of internal components of laminated glass in high humidity environments, and PVB film is prone to delamination and bubbling in high humidity environments. Both also have problems with ion migration and water vapor penetration, which affect the performance and appearance of laminated glass.
POE, PA and POE copolymer, and PP are used as the first adhesive film layer, and EVA or PVB is used as the second adhesive film layer. By adjusting the material composition and thickness ratio, an encapsulating film is formed. Combined with water-blocking adhesive, the intermediate functional layer is protected to avoid corrosion and ion migration, thereby improving production efficiency and light transmittance.
It achieves water resistance and ion migration resistance in high humidity environments, avoids the deterioration of the functional layer of laminated glass, improves production efficiency, reduces costs, and ensures light transmission performance and appearance quality.
Smart Images
Figure CN223906779U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to encapsulation adhesive film technical field especially relates to a kind of encapsulation adhesive film and laminated glass. BACKGROUND
[0002] With the development of laminated glass industry, more and more functional laminated glass products appear, such as various light-adjustable glass, intelligent glass, and the existing technology usually needs to use PVB adhesive film (polyvinyl butyral) or EVA adhesive film (ethylene-vinyl acetate copolymer) for encapsulation.
[0003] However, EVA is prone to hydrolysis to produce acetic acid when used in a high humidity environment, which can easily corrode some metal wiring and components inside the functional laminated glass, thereby causing the performance of the functional laminated glass to decline or even fail, and EVA encapsulation also has problems such as ion migration.
[0004] For light-adjustable glass or intelligent glass with a liquid crystal core layer, the plasticizer and many other small molecular components contained in PVB can react with the liquid crystal polymer in the liquid crystal core layer, causing the light-adjustable film to become partially transparent and lose its light-adjusting function. In addition, PVB adhesive film generally has poor water resistance, and when used in a high temperature and humidity environment, it is prone to delamination and blistering. Furthermore, the processing method of PVB adhesive film is high-temperature and high-pressure processing, which can easily cause the performance of the light-adjustable film to deteriorate and the production efficiency to be low.
[0005] Laminated glass is generally not treated on the edges during use, so the edge of the encapsulation material is directly connected to the environment, and water vapor and other small molecular substances in the environment can easily penetrate into the encapsulation material, damaging the bonding surface of the encapsulation material and the glass, causing the edge of the laminated glass to delaminate. For light-adjustable glass or intelligent glass with a liquid crystal core layer, water vapor and other small molecular substances can also penetrate into the liquid crystal core layer, causing the liquid crystal core layer to delaminate and be damaged, which can seriously affect the appearance and performance of the laminated glass. SUMMARY
[0006] The utility model provides a kind of encapsulation adhesive film and laminated glass to solve the water vapor barrier performance of the encapsulation structure in the prior art is insufficient, there is corrosion, ion migration and other problems.
[0007] To solve the above technical problems in the prior art, the utility model provides an encapsulation adhesive film, which includes at least one first adhesive film layer and at least one second adhesive film layer; the first adhesive film layer is one of a POE layer, a copolymer layer of PA and POE, and a PP layer; and the second adhesive film layer is an EVA layer or a PVB layer.
[0008] In the scheme, the packaging adhesive film comprises at least one first adhesive film layer and at least one second adhesive film layer, wherein the first adhesive film layer is selected from POE, a copolymer of PA and POE and PP material, all of which have good water resistance and ion migration resistance and are non-corrosive, so as not to cause corrosion damage to other materials in contact with the first adhesive film layer, and can achieve good packaging effect and greatly avoid deterioration and failure of the intermediate functional layer packaged by the packaging adhesive film. The second adhesive film layer is selected from EVA or PVB and used in cooperation with the first adhesive film layer, which can not only effectively reduce the packaging cost, but also avoid the haze problem caused by using the first adhesive film layer alone for packaging by adjusting the VA content of the EVA material or the thickness of the second adhesive film layer within a reasonable range, so as to ensure the light transmission performance of the laminated glass.
[0009] According to an embodiment of the utility model, in order to better provide the water resistance of the packaging adhesive film, the water vapor transmission rate of the first adhesive film layer is <10g / m 2 / 24hr.
[0010] According to an embodiment of the utility model, the packaging adhesive film comprises a second adhesive film layer and a first adhesive film layer arranged in layers, and the second adhesive film layer is an EVA layer.
[0011] In the scheme, the EVA has good bonding performance, light transmission and insulation performance, can achieve good packaging effect, and can ensure the light transmission and insulation performance of the packaging adhesive film to improve the overall performance of the packaging adhesive film. In addition, the EVA does not need high-temperature and high-pressure process materials for forming, can significantly improve the production efficiency of the laminated glass using the packaging adhesive film of the utility model, and can effectively avoid failure of the functional film during the forming stage.
[0012] According to an embodiment of the utility model, in order to ensure better bonding performance, light transmission and insulation performance, the VA content of the EVA layer is 22-34%.
[0013] According to an embodiment of the utility model, the thickness of the first adhesive film layer is 0.05~0.4mm; and the thickness of the second adhesive film layer is 0.1~0.5mm.
[0014] In the scheme, by limiting the thickness of the first adhesive film layer and the second adhesive film layer within a reasonable range, better synergistic effect between the two layers is achieved, which can provide water resistance of the packaging adhesive film, realize low haze, and ensure the light transmission performance of the laminated glass.
[0015] According to an embodiment of the utility model, in order to realize better synergistic effect, the thickness ratio of the second adhesive film layer to the first adhesive film layer is 1:4~4:1.
[0016] According to an embodiment of the utility model, the thickness of the packaging adhesive film is 0.38~0.9mm.
[0017] According to an embodiment of the present application, the encapsulation adhesive film has a haze of 0.5-3%, preferably 0.6-1%.
[0018] The present application also provides a laminated glass, which comprises, from bottom to top, an outer layer, a first encapsulation adhesive film layer, an intermediate functional layer, a second encapsulation adhesive film layer and an outer layer, the first encapsulation adhesive film layer and / or the second encapsulation adhesive film layer being the encapsulation adhesive film described above; the first encapsulation adhesive film layer and the second encapsulation adhesive film layer have the same or different structures; the first encapsulation adhesive film layer and / or the second encapsulation adhesive film layer has a first adhesive film layer arranged close to the intermediate functional layer.
[0019] It should be noted that the intermediate functional layer can be a functional film having the functions of display, heating, light modulation, heat insulation and the like.
[0020] According to an embodiment of the present application, the horizontal distance a between the outer edge of the intermediate functional layer and the outer edge of the first encapsulation adhesive film layer and / or the second encapsulation adhesive film layer is 2-7mm.
[0021] In the above scheme, the laminated glass of the present application has the distance between the intermediate functional layer and the outer edge within a reasonable range, which not only achieves the purpose of saving encapsulation cost, but also ensures the edge water resistance of the laminated glass.
[0022] According to an embodiment of the present application, the outer layer is made of glass or PC material, and has a thickness of 1.8-3.2mm; the intermediate functional layer has a thickness of 0.18-0.4mm.
[0023] According to an embodiment of the present application, the laminated glass further comprises a water-blocking adhesive, which is coated on the outer periphery of the intermediate functional layer.
[0024] In the above scheme, the laminated glass of the present application is provided with a water-blocking adhesive to improve the edge water vapor barrier performance, which better protects the intermediate functional layer from failure and avoids appearance problems such as glue opening caused by water vapor.
[0025] The present application has the following technical advantages compared with the prior art by adopting the above technical scheme:
[0026] (1) The encapsulation adhesive film of the present application is made of POE, EVA and other materials without the need for high-temperature and high-pressure processes, which can significantly improve the production efficiency of the laminated glass using the encapsulation adhesive film of the present application, and effectively prevent the functional film from failing during the forming stage.
[0027] (2) The packaging adhesive film of the utility model selects EVA or PVB as the second adhesive film layer and uses in cooperation with the first adhesive film layer, which not only can effectively reduce the packaging cost, but also can avoid the haze problem caused by using the first adhesive film layer alone for packaging by adjusting the VA content of the EVA material or adjusting the thickness of the second adhesive film layer within a reasonable range value, and guarantee the light transmission performance of the laminated glass.
[0028] (3) The laminated glass of the utility model is close to the intermediate functional layer, and the first adhesive film layer is selected from POE, a copolymer of POE and PA and PP material, which all have good water resistance and ion migration resistance and do not have hydrolysis phenomenon, so as not to cause corrosion damage to the intermediate functional layer and greatly avoid the deterioration and failure of the intermediate functional layer. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0030] Figure 1 It is the packaging adhesive film structure schematic view provided by the utility model.
[0031] Figure 2 It is the laminated glass structure schematic view provided by the utility model.
[0032] Reference signs:
[0033] 1: outer layer; 2: second adhesive film layer; 3: first adhesive film layer; 4: intermediate functional layer; 5: water blocking adhesive. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the drawings in the utility model to clearly and completely describe the technical scheme in the utility model, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection range of the utility model.
[0035] Embodiment 1-7
[0036] The embodiment provides a kind of packaging adhesive film, such as Figure 1As shown, the encapsulation adhesive film comprises a second adhesive film layer 2 and a first adhesive film layer 3 arranged in a stack, the second adhesive film layer 2 is an EVA layer (VA content is 28%), and the first adhesive film layer 3 is a POE layer, and the water vapor transmission rate is 5.3 g / m 2 The thicknesses of the second adhesive film layer 2 and the first adhesive film layer 3 are shown in Table 1 below.
[0037] Table 1
[0038]
[0039] Example 8
[0040] The encapsulation adhesive film of the present example is different from that of Example 1 only in that the second adhesive film layer 2 is a PVB layer.
[0041] Example 9
[0042] The encapsulation adhesive film of the present example is different from that of Example 1 only in that the first adhesive film layer 3 is a copolymer layer of PA and POE.
[0043] Example 10
[0044] The encapsulation adhesive film of the present example is different from that of Example 1 only in that the first adhesive film layer 3 is a PP layer.
[0045] Example 11
[0046] The laminated glass of the present example comprises, from top to bottom, an outer layer 1, the encapsulation adhesive film of Example 1 (the encapsulation adhesive film comprises a second adhesive film layer 2 and a first adhesive film layer 3 arranged in a stack), a middle functional layer 4, the encapsulation adhesive film of Example 1 (the encapsulation adhesive film comprises a first adhesive film layer 3 and a second adhesive film layer 2 arranged in a stack), and the outer layer 1. Figure 2 As shown, the encapsulation adhesive film comprises a second adhesive film layer 2 and a first adhesive film layer 3 arranged in a stack, the second adhesive film layer 2 is an EVA layer (VA content is 28%), and the first adhesive film layer 3 is a POE layer, and the water vapor transmission rate is 5.3 g / m
[0047] Examples 12-20
[0048] The laminated glass of the present example is different from that of Example 11 only in that the encapsulation adhesive film of Example 1 is replaced by the encapsulation adhesive film of Examples 2-10, respectively.
[0049] Comparative Example 1
[0050] The laminated glass of the present example is different from that of Example 11 only in that the encapsulation adhesive film of Example 1 is replaced by an EVA layer.
[0051] Comparative Example 2
[0052] The present comparative example provides a laminated glass, which is different from Example 11 only in that the encapsulation adhesive film of the example is replaced by a POE layer.
[0053] Comparative Example 3
[0054] The present comparative example provides a laminated glass, which is different from Example 11 only in that the encapsulation adhesive film of the example is replaced by a PVB layer.
[0055] The laminated glasses of Examples 11-20 and Comparative Examples 1-3 are respectively subjected to the haze test and the moisture resistance test under the energized state, the test method is JCT2129-2012, and the test results are shown in Table 2.
[0056] Table 2
[0057]
[0058] As can be seen from the experimental data in Table 2, the laminated glass of the present application is encapsulated by the encapsulation adhesive film composed of the first adhesive film layer and the second adhesive film layer, and at the same time, by limiting the thickness of the first adhesive film layer and the second adhesive film layer within a reasonable range of values, a better synergistic effect between the two layers is achieved, which provides the water resistance of the encapsulation adhesive film while also achieving low haze and ensuring the light transmission performance of the laminated glass. As can be seen from the results of Example 11 and Comparative Examples 1 and 3, compared with using an EVA layer or a PVB layer as an encapsulation adhesive film, the laminated glass encapsulated by the encapsulation adhesive film of the present application has more excellent moisture resistance. As can be seen from the results of Example 11 and Comparative Example 2, compared with using a POE layer as an encapsulation adhesive film, the laminated glass encapsulated by the encapsulation adhesive film of the present application has significantly lower haze.
[0059] Examples 21-24
[0060] The present example provides a laminated glass, which is different from Example 11 only in that the horizontal distance a is different, and the moisture resistance test is performed on Examples 21-24, the test method is JCT2129-2012, and the test results are specifically shown in Table 3.
[0061] Table 3
[0062]
[0063] As can be seen from the experimental data in Table 3, the laminated glass of the present application can ensure the edge water resistance of the laminated glass by designing the distance between the intermediate functional layer and the outer edge within a reasonable range of values.
[0064] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. An encapsulating film, characterized in that, It includes at least one first adhesive film layer and at least one second adhesive film layer; the first adhesive film layer is one of POE layer, PA and POE copolymer layer, and PP layer; the second adhesive film layer is EVA layer or PVB layer.
2. The encapsulating film according to claim 1, characterized in that, The encapsulating film includes a second film layer and a first film layer stacked together, wherein the second film layer is an EVA layer.
3. The encapsulating film according to claim 2, characterized in that, The VA content of the EVA layer is 22-34%.
4. The encapsulating film according to claim 1, characterized in that, The thickness of the first adhesive film layer is 0.05–0.4 mm; the thickness of the second adhesive film layer is 0.1–0.5 mm.
5. The encapsulating film according to claim 1, characterized in that, The thickness ratio of the second adhesive film layer to the first adhesive film layer is 1:4 to 4:
1.
6. The encapsulating film according to any one of claims 1 to 5, characterized in that, The thickness of the encapsulating film is 0.38–0.9 mm.
7. A type of laminated glass, characterized in that, The laminated glass comprises, from bottom to top, an outer layer, a first encapsulating film layer, an intermediate functional layer, a second encapsulating film layer, and an outer layer. The first encapsulating film layer and / or the second encapsulating film layer are the encapsulating films according to any one of claims 1 to 6. The first encapsulating film layer and the second encapsulating film layer have the same or different structures. The first encapsulating film layer of the first encapsulating film layer and / or the first encapsulating film layer of the second encapsulating film layer are disposed close to the intermediate functional layer.
8. The laminated glass according to claim 7, characterized in that, The horizontal distance 'a' between the outer edge of the intermediate functional layer and the outer edge of the first encapsulating film layer and / or the second encapsulating film layer is 2 to 7 mm.
9. The laminated glass according to claim 7, characterized in that, The outer layer is made of glass or PC material; the thickness of the outer layer is 1.8–3.2 mm; the thickness of the intermediate functional layer is 0.18–0.4 mm.
10. The laminated glass according to any one of claims 7 to 9, characterized in that, The laminated glass also includes a water-blocking adhesive, which covers the outer periphery of the intermediate functional layer.