High performance light transmitting plastic encapsulation film

Abstract

The utility model discloses a kind of high-performance light-transmitting plastic packaging films, with excellent gloss and light transmission, while having high weather resistance and good wear-resistant scratch-resistant effect. Including substrate, the upper surface of the substrate is sequentially provided with first diffusion layer, first adhesive layer, barrier layer, second adhesive layer, ultraviolet absorption layer, wear-resistant layer and scratch-resistant layer, the lower surface of the substrate is sequentially provided with second diffusion layer and transparent adhesive layer, the barrier layer uses EVOH material, the barrier layer is firmly adhered with the first diffusion layer and the ultraviolet absorption layer by first adhesive layer and second adhesive layer.

Description

Technical Field

[0001] This utility model relates to the advantages of plastic sealing film technology, specifically a high-performance light-transmitting plastic sealing film. Background Technology

[0002] Laminating film, also known as heat laminating film, card protector, or coating film, is a helpful tool for laminating photos and documents in daily life. Laminating film requires a laminating machine for heating. Different thicknesses require different laminating temperatures, and the laminating temperature depends on the pressure and speed of the laminating machine and the thickness of the laminating film. The advantages of laminating film are: moisture-proof, dust-proof, fade-proof, protecting documents and photos, and long-term use. Before use, cut the laminating paper to the appropriate size according to the size of the paper to be laminated. Various standard sizes of laminating paper, such as A4 and A6, are generally available on the market. Generally, the laminating paper should be slightly larger than the paper to be laminated. Place the paper to be laminated flat between the two layers of laminating paper and heat it with a laminating machine. After heating, the paper to be laminated is sealed by the laminating paper (because the two opposing surfaces of the laminating paper have adhesive, they will stick together after heating), providing a certain degree of waterproofing and extending its lifespan. When laminating data sheets, the laminating film must first be separated, and the data sheets sandwiched in the middle, with the adhesive side of the laminating film facing the data sheets. Then, the laminating film is closed and fed into the laminating machine from front to back for heating. After being pressed by the front and rear adhesive rollers, the data sheets come out from the rear outlet, thus achieving the purpose of lamination.

[0003] For example, Chinese patent CN212199098U discloses a high-transparency molding film, comprising a base layer, a first nano-titanium dioxide film layer disposed on the upper surface of the base layer, an ultraviolet absorption layer disposed on the upper surface of the first nano-titanium dioxide film layer, a metal foil laser layer disposed on the upper surface of the ultraviolet absorption layer, a color printing layer disposed on the upper surface of the metal foil laser layer, a polyimide layer disposed on the upper surface of the color printing layer, a semi-crystalline polyester disposed between the base layer and the first nano-titanium dioxide film layer, and a second nano-titanium dioxide film layer disposed at both ends of the molding film body; the polyesterimide layer has higher heat resistance, flexibility and transparency, the first nano-titanium dioxide film layer gives the molding film excellent gloss and transparency, greatly improving light transmittance, while the semi-crystalline polyester gives the molding film higher light reflection ability and transparency.

[0004] In practical applications, the surface of the laminating film is easily subject to wear and scratches, which will affect the transparency and light transmission of the laminating film. Therefore, the light transmission and transparency of the laminating film disclosed in this patent are still not ideal in use. At the same time, due to the special environment in which the laminating film is used, it is also necessary for the laminating film to have high weather resistance while ensuring high transparency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology and provide a high-performance light-transmitting plastic sealant film with excellent gloss and light transmittance, as well as high weather resistance and good wear and scratch resistance.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a high-performance light-transmitting plastic sealant film, comprising a substrate, wherein the upper surface of the substrate is sequentially provided with a first diffusion layer, a first adhesive layer, a barrier layer, a second adhesive layer, an ultraviolet absorption layer, a wear-resistant layer, and a scratch-resistant layer, and the lower surface of the substrate is sequentially provided with a second diffusion layer and a transparent adhesive layer, wherein the barrier layer is made of EVOH material, and the barrier layer is firmly bonded to the first diffusion layer and the ultraviolet absorption layer through the first adhesive layer and the second adhesive layer.

[0007] Furthermore, both the first diffusion layer and the second diffusion layer are made of polyacrylic acid resin, and scattering particles are disposed in the first diffusion layer and the second diffusion layer. The scattering particles are spherical particles made of silicon dioxide.

[0008] Furthermore, both the first adhesive layer and the second adhesive layer are modified polyolefin adhesive resins.

[0009] Furthermore, the barrier layer is an ethylene-vinyl alcohol copolymer.

[0010] Furthermore, the ultraviolet absorbing layer is made of modified polyolefin, and a highly efficient ultraviolet absorber and a hindered amine light stabilizer are added thereto.

[0011] Furthermore, the wear-resistant layer is a COP film.

[0012] Furthermore, the scratch-resistant layer is a nanoparticle-reinforced coating applied to the surface of the wear-resistant layer.

[0013] Furthermore, the transparent adhesive layer is made of OCA adhesive.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects:

[0015] 1. A first diffusion layer and a second diffusion layer are respectively provided on the upper and lower sides of the substrate. Scattering particles are provided in the first diffusion layer and the second diffusion layer. The refractive index of the scattering particles is different from that of the first diffusion layer and the second diffusion layer. When light passes through the first diffusion layer and the second diffusion layer, it will continuously pass through two media with different refractive indices. Therefore, the light will undergo many refraction, reflection and scattering phenomena, thereby correcting the light diffusion angle and making the light become light with a larger area, better uniformity and stable color.

[0016] 2. A barrier layer is set. The barrier layer is ethylene-vinyl alcohol copolymer (EVOH). EVOH has high transparency, which can provide good visual effect. It also has a certain toughness and is not easy to break or tear. At the same time, EVOH has excellent barrier properties against gases and water vapor, which can play a good waterproof role. In addition, EVOH has good processability and can be heat-sealed, stretched, coated and other processes, which facilitates production and use.

[0017] 3. An ultraviolet absorption layer is provided. The ultraviolet absorption layer is made of modified polyolefin and contains a high-efficiency ultraviolet absorber (UVA) and a hindered amine light stabilizer (HALS). The addition of the high-efficiency ultraviolet absorber (UVA) enables the ultraviolet absorption layer 6 to efficiently absorb and convert harmful UV radiation, preventing it from penetrating into the membrane and causing polymer degradation and yellowing.

[0018] 4. The wear-resistant layer and the scratch-resistant layer are set. The wear-resistant layer provides the main scratch resistance, abrasion resistance and tear resistance of the plastic sealant. The scratch-resistant layer is a nano-particle reinforced coating applied to the surface of the wear-resistant layer, which can further improve the surface hardness and scratch resistance of the plastic sealant, thereby increasing the service life of the plastic sealant and avoiding the impact of scratches or wear on the light transmission effect of the plastic sealant.

[0019] 5. The transparent adhesive layer uses OCA adhesive, which is colorless and transparent with a light transmittance of over 90% and good bonding strength, ensuring bonding strength without affecting the light transmission effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-performance light-transmitting plastic sealant of this utility model.

[0021] Reference numerals: 1. Substrate; 2. First diffusion layer; 3. First adhesive layer; 4. Barrier layer;

[0022] 5. Second adhesive layer; 6. Ultraviolet absorption layer; 7. Wear-resistant layer; 8. Scratch-resistant layer; 9. Second diffusion layer;

[0023] 10. Transparent adhesive layer; 11. Scattering particles. Detailed Implementation

[0024] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] In this embodiment, a high-performance light-transmitting plastic sealant is provided, including a substrate 1. The upper surface of the substrate 1 is sequentially provided with a first diffusion layer 2, a first adhesive layer 3, a barrier layer 4, a second adhesive layer 5, an ultraviolet absorption layer 6, a wear-resistant layer 7, and a scratch-resistant layer 8. The lower surface of the substrate 1 is sequentially provided with a second diffusion layer 9 and a transparent adhesive layer 10.

[0026] In this embodiment, the substrate 1 is made of copolyester sheet. In this solution, PETG is used. PETG has high transparency and excellent impact resistance. In addition, PETG has excellent formability. It will not turn white or crack when cold-bent, which can ensure the basic transparency of the plastic sealant.

[0027] In this embodiment, both the first diffusion layer 2 and the second diffusion layer 9 are made of polyacrylic acid resin, and scattering particles 11 are provided in the first diffusion layer 2 and the second diffusion layer 9. The scattering particles 11 are spherical particles made of silicon dioxide. The refractive index of the scattering particles 11 is different from that of the first diffusion layer 2 and the second diffusion layer 9, so that when light passes through the first diffusion layer 2 and the second diffusion layer 9, it will continuously pass through two media with different refractive indices. Therefore, the light will undergo many refraction, reflection and scattering phenomena, thereby correcting the light diffusion angle and making the light become light with a larger area, better uniformity and stable color.

[0028] In this embodiment, the barrier layer 4 is an ethylene-vinyl alcohol copolymer (EVOH). EVOH has high transparency, which can provide good visual effects, and has a certain degree of toughness, making it not easy to break or tear. At the same time, EVOH has excellent barrier properties against gases and water vapor, which can play a good waterproof role. In addition, EVOH also has good processability and can be heat-sealed, stretched, coated and other processes, which facilitates production and use.

[0029] In this embodiment, the first adhesive layer 3 and the second adhesive layer 5 are both modified polyolefin adhesive resins, such as Surlyn ionic polymer, EAA, EMA, EVA, etc. Since the barrier properties of EVOH will decrease in a high humidity environment, it is necessary to use the first adhesive layer 3 and the second adhesive layer 5 to firmly bond the first diffusion layer 2 of the barrier layer 4 and the ultraviolet absorption layer 6 to ensure that the layers do not delaminate.

[0030] In this embodiment, the ultraviolet absorbing layer 6 is made of modified polyolefin, and a high-efficiency ultraviolet absorber (UVA) and a hindered amine light stabilizer (HALS) are added thereto. The addition of the high-efficiency ultraviolet absorber (UVA) enables the ultraviolet absorbing layer 6 to efficiently absorb and convert harmful UV radiation, preventing it from penetrating into the film and causing polymer degradation and yellowing, thereby preventing the encapsulated objects (such as photovoltaic cells, art pigments, and electronic components) from aging and failing due to UV. The hindered amine light stabilizer (HALS) can effectively capture free radicals R. in the polymer degradation chain reaction, generating TMPO.R, and then remove peroxide free radicals ROO. to generate inert ROO. The removal and deactivation of R. and ROO. inhibits the chain reaction of polymer degradation and aging.

[0031] In this embodiment, the wear-resistant layer 7 is a COP film, namely a cyclic olefin polymer film, covering the surface of the ultraviolet absorption layer 6. The COP film has high transparency and excellent wear resistance, good gas and water vapor barrier properties, and can effectively protect the internal materials from the influence of the external environment. At the same time, the COP film also has high heat resistance, providing the main anti-scratch, anti-wear and anti-tear properties for the plastic sealant.

[0032] In this embodiment, the scratch-resistant layer 8 is a nanoparticle-reinforced coating applied to the surface of the wear-resistant layer 7. In this solution, it is a silica nanocomposite coating, which can further improve the surface hardness and scratch resistance of the plastic sealant.

[0033] In this embodiment, the transparent adhesive layer 10 is made of OCA adhesive, which is colorless and transparent with a light transmittance of over 90% and good bonding strength. This ensures the bonding strength without affecting the light transmission effect.

[0034] The high-performance translucent plastic sealant provided by this utility model has the following advantages: A first diffusion layer 2 and a second diffusion layer 9 are respectively disposed on the upper and lower sides of the substrate 1. Scattering particles 11 are disposed in the first diffusion layer 2 and the second diffusion layer 9. The scattering particles 11 are spherical particles made of silicon dioxide. The refractive index of the scattering particles 11 is different from that of the first diffusion layer 2 and the second diffusion layer 9. This causes light to continuously pass through two media with different refractive indices when passing through the first diffusion layer 2 and the second diffusion layer 9, resulting in numerous refraction, reflection, and scattering phenomena. This corrects the light diffusion angle, making the light larger, more uniform, and more chromatic. A barrier layer 4 is provided. The barrier layer 4 is an ethylene-vinyl alcohol copolymer (EVOH). EVOH has high transparency, providing good visual effects, and has a certain degree of toughness, making it less prone to breakage or tearing. At the same time, EVOH has excellent barrier properties against gases and water vapor, providing a good waterproof effect. Furthermore, EVOH... OH also has good processability, allowing for heat sealing, stretching, coating, and other processing, facilitating production and use. A UV absorption layer 6 is provided, made of modified polyolefin with added high-efficiency UV absorber (UVA) and hindered amine light stabilizer (HALS). The addition of UVA allows the UV absorption layer 6 to efficiently absorb and convert harmful UV radiation, preventing it from penetrating the film and causing polymer degradation and yellowing. An abrasion-resistant layer 7 and a scratch-resistant layer 8 are provided. The abrasion-resistant layer 7 provides the main scratch, abrasion, and tear resistance for the molding film. The scratch-resistant layer 8 is a nanoparticle-reinforced coating applied to the surface of the abrasion-resistant layer 7, further enhancing the surface hardness and scratch resistance of the molding film, thereby increasing its service life and preventing damage to the light transmittance due to scratches or abrasion. The transparent adhesive layer 10 uses OCA adhesive, which is colorless and transparent with a light transmittance of over 90% and good bonding strength, ensuring adhesion without affecting light transmittance.

[0035] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-performance light-transmitting plastic sealant, characterized in that: The substrate (1) includes a first diffusion layer (2), a barrier layer (4), an ultraviolet absorption layer (6), a wear-resistant layer (7), and a scratch-resistant layer (8) sequentially disposed on the upper surface of the substrate (1). The lower surface of the substrate (1) is provided with a second diffusion layer (9) and a transparent adhesive layer (10) sequentially disposed on the lower surface of the substrate (1). The barrier layer (4) is made of EVOH material. The barrier layer (4) is firmly bonded to the first diffusion layer (2) and the ultraviolet absorption layer (6) through a first adhesive layer (3) and a second adhesive layer (5).

2. The high-performance transparent plastic sealing film according to claim 1, characterized in that: Both the first diffusion layer (2) and the second diffusion layer (9) are made of polyacrylic acid resin, and scattering particles (11) are provided in the first diffusion layer (2) and the second diffusion layer (9). The scattering particles (11) are spherical particles made of silicon dioxide.

3. The high-performance transparent plastic sealing film according to claim 1, characterized in that: Both the first adhesive layer (3) and the second adhesive layer (5) are modified polyolefin adhesive resins.

4. The high-performance transparent plastic sealing film according to claim 1, characterized in that: The barrier layer (4) is an ethylene-vinyl alcohol copolymer.

5. The high-performance transparent plastic sealing film according to claim 1, characterized in that: The ultraviolet absorption layer (6) is made of modified polyolefin, and a high-efficiency ultraviolet absorber and a hindered amine light stabilizer are added thereto.

6. The high-performance transparent plastic sealing film according to claim 1, characterized in that: The wear-resistant layer (7) is a COP film.

7. The high-performance transparent plastic sealing film according to claim 1, characterized in that: The scratch-resistant layer (8) is a nanoparticle-reinforced coating applied to the surface of the wear-resistant layer (7).

8. The high-performance transparent plastic sealing film according to claim 1, characterized in that: The transparent adhesive layer (10) is made of OCA adhesive.

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