High-barrier windowing PET cover film

Abstract

The utility model relates to the technical field of packaging materials, in particular to a high-barrier windowing PET cover film which comprises a cover film body, an opening is formed in the cover film body, a transparent sealing layer is arranged on the inner side of the opening, a set of multi-stage cover hole films are arranged on the outer side of the opening in an opening and closing mode when the opening swings, and a plurality of positioning modules are evenly connected to the edges of the multi-stage cover hole films. Positioning film holes are formed in the inner walls, corresponding to the positioning modules, of the holes, the positioning modules and the positioning film holes are positioned in an inserted friction mode, the multi-stage hole covering film is of a composite structure and is the same as the covering film body, the covering film body comprises a PET base film arranged in the middle, and high-barrier material layers are symmetrically arranged on the upper side and the lower side of the PET base film. An antibacterial coating is arranged in the lower high-barrier material layer, an antistatic coating is arranged at the top of the upper high-barrier material layer, and a nano coating is arranged outside the antistatic coating. The cover film is of a selective visual structure and is diversified in function and practical in performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of packaging material, specifically is high barrier open window PET cover film. BACKGROUND

[0002] With the continuous development of the packaging industry, the requirement of packaging material is also higher and higher. Especially in the field of food, medicine and other high barrier properties, the traditional packaging material often cannot meet the needs of long time preservation and moistureproof, oxidation resistance. PET (polyethylene terephthalate) as a common packaging material, has good transparency and mechanical properties, but there is still room for improvement in barrier performance.

[0003] Therefore, in view of the above problems, the technical scheme provides high barrier open window PET cover film. UTILITY MODEL CONTENT

[0004] The utility model discloses a high barrier open window PET cover film to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] High barrier open window PET cover film, including cover film body, set up one opening hole on the cover film body, the inside of opening hole is provided with transparent sealing layer, and a group of multistage cover hole films are set up and closed when the outside of opening hole swings, a plurality of positioning modules are evenly connected and set up on the edge of multistage cover hole films, positioning film holes are set up in the inner wall of corresponding opening hole of positioning module, and positioning module and positioning film hole are inserted and positioned by friction, multistage cover hole films are set up as composite structure, and are same with cover film body, and the cover film body includes PET base film arranged in the middle, and high barrier material layer is symmetrically arranged on the upper and lower sides of PET base film, antibacterial coating is arranged in the inside of lower high barrier material layer, and antistatic coating is arranged on the top of upper high barrier material layer, and nanometer coating is arranged outside antistatic coating.

[0007] Preferably, the surface of the positioning module in contact with the positioning film hole is provided with a corrugated layer.

[0008] Preferably, the high barrier material layer is made of ethylene-vinyl alcohol copolymer or aluminum foil.

[0009] Preferably, the composite connection between the PET base film, the high barrier material layer, the nanometer coating, the antibacterial coating and the antistatic coating is formed by hot pressing or adhesive.

[0010] Preferably, the transparent sealing layer is a composite structure of the PET base film and the high barrier material layer.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by opening an opening in the cover film body and setting a multi-level cover film on the outside of the opening to control the visibility of the opening, the visibility of the opening can be automatically selected as needed, providing multiple options for use;

[0012] By combining the PET base film with a high-barrier material layer, the high barrier properties of the cover film are increased. At the same time, nano-coatings, antibacterial coatings, and antistatic coatings are added inside to further improve the antibacterial and waterproof properties of the cover film, thereby greatly enhancing the performance advantages of this PET cover film to a certain extent. Attached Figure Description

[0013] Fig. 1 This is a top view of the structure of a high-barrier, windowed PET cover film.

[0014] Fig. 2 This is a schematic diagram of the partial inner structure of a high-barrier, windowed PET cover film.

[0015] Among them: PET base film 10, high barrier material layer 11, nano coating 12, antibacterial coating 13, antistatic coating 14, opening 15, multi-level capping membrane 16, positioning module 17, positioning membrane hole 18. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Please see Figs. 1-2 A high-barrier PET cover film with an opening 15 is provided on the cover film body. The shape of the opening 15 is determined according to the actual design requirements. A transparent sealing layer is provided on the inner side of the opening 15. When the outer side of the opening 15 swings, a set of multi-level cover film 16 is provided to open and close. Multiple positioning modules 17 are evenly connected on the edge of the multi-level cover film 16. Positioning film holes 18 are provided in the inner wall of the opening 15 corresponding to the positioning module 17. The positioning module 17 and the positioning film hole 18 are inserted and frictionally positioned. The multi-level cover film 16 is set as a composite structure and is the same as the cover film body. Taking the cover film body as an example, the cover film body includes a PET base film 10 set in the middle. High-barrier material layers 11 are symmetrically arranged on the upper and lower sides of the PET base film 10. An antibacterial coating 13 is provided inside the high-barrier material layer 11, and an antistatic coating 14 is provided on the top of the upper high-barrier material layer 11. A nano-coating 12 is provided on the outside of the antistatic coating 14. By laminating a high-barrier material layer 11 on both sides of the PET base film 10, the penetration of oxygen and moisture can be effectively prevented, extending the shelf life of the packaged goods. The antibacterial coating 13 inhibits the growth of bacteria, mold and other microorganisms, improving freshness and shelf life. The antistatic coating 14 is used to reduce static electricity accumulation and prevent dust and particles from adsorbing on the surface of the cover film. The nano-coating 12 can significantly improve the barrier performance of the cover film and prevent the penetration of gases (such as oxygen and water vapor). It is suitable for packaging of food, medicine and other products that require high barrier requirements for long-term preservation.

[0021] In this embodiment of the invention, the surface of the positioning module 17 that contacts the positioning membrane hole 18 is provided with a corrugated layer to increase the stability of the insertion and positioning with the positioning membrane hole 18.

[0022] The edges of the 15-inch opening are precisely cut to ensure a smooth, burr-free surface. This process is typically done using a die-cutting method.

[0023] The high-barrier material layer 11 can be made of EVOH (ethylene-vinyl alcohol copolymer) or aluminum foil.

[0024] In one embodiment of the present invention, the composite connection between the PET base film 10, the high barrier material layer 11, the nano coating 12, the antibacterial coating 13, and the antistatic coating 14 is generally achieved by hot pressing or adhesive molding and positioning.

[0025] In a preferred embodiment of the present invention, the transparent sealing layer adopts a composite structure of a PET base film 10 and a high-barrier material layer 11. During processing, a PET film with high transparency and a smooth surface is selected as the substrate. The high-barrier material is selected as an ethylene-vinyl alcohol copolymer with good transparency. Then, under the action of an adhesive, the high-barrier material is laid on the outer surface of the PET film.

[0026] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A high-barrier, windowed PET cover film, characterized in that, The cover film body includes an opening (15) on the cover film body. A transparent sealing layer is provided inside the opening (15). A set of multi-level cover film (16) is provided when the opening (15) swings. Multiple positioning modules (17) are uniformly connected on the edge of the multi-level cover film (16). Positioning film holes (18) are provided in the inner wall of the opening (15) corresponding to the positioning module (17). The positioning module (17) is inserted into the positioning film hole (18) for friction positioning. The multi-level cover film (16) is set as a composite structure and is the same as the cover film body. The cover film body includes a PET base film (10) set in the middle. High barrier material layers (11) are symmetrically arranged on the upper and lower sides of the PET base film (10). An antibacterial coating (13) is provided inside the lower high barrier material layer (11). An antistatic coating (14) is provided on the top of the upper high barrier material layer (11). A nano coating (12) is provided on the outside of the antistatic coating (14).

2. The high-barrier, open-window PET cover film according to claim 1, characterized in that, The surface of the positioning module (17) that contacts the positioning membrane hole (18) is provided with a corrugated layer.

3. The high-barrier, open-window PET cover film according to claim 2, characterized in that, The high-barrier material layer (11) is made of ethylene-vinyl alcohol copolymer or aluminum foil.

4. The high-barrier, open-window PET cover film according to claim 3, characterized in that, The composite connection between the PET base film (10), the high barrier material layer (11), the nano coating (12), the antibacterial coating (13), and the antistatic coating (14) is formed by hot pressing or adhesive molding.

5. The high-barrier, open-window PET cover film according to claim 4, characterized in that, The transparent sealing layer adopts a composite structure of PET base film (10) and high barrier material layer (11).

Images