Punching-resistant polypropylene film for capacitor

Abstract

The utility model discloses a punching-resistant polypropylene film for a capacitor, which comprises a wind-up roll, a base film is wound on the surface of the wind-up roll, a weather-resistant layer is wrapped on the surface of the base film, and a reinforcing layer is wrapped on the surface of the weather-resistant layer. Through the arrangement of the polyethylene film layer, the polypropylene film layer and the hard PVC film layer, the strength of the wind-up roller is greatly improved, the wind-up roller is prevented from being abraded and punctured by foreign objects in the using process, and through the arrangement of the polyvinyl chloride film layer, the TPU film layer and the polyvinylidene fluoride film layer, the service life of the wind-up roller is prolonged. The wind-up roll has a corrosion-resistant function, can be suitable for various severe environments and is prevented from being corroded in the using process, the service life of the wind-up roll is greatly prolonged, and the problems that an existing capacitor thin film is prone to being abraded and punctured by foreign objects in the using process, the thin film is damaged, and the service life of the thin film is prolonged are solved. And the protection effect is lost.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitor films, in particular to a polypropylene film for a breakdown-resistant capacitor. Background Art

[0002] Capacitor film uses metal foil as electrode, which is compounded with polypropylene base film and formed into components by non-inductive winding method. The capacitor film on the market usually uses polypropylene as base film, which has stable physical properties, excellent mechanical strength and excellent electrical insulation properties.

[0003] However, with the rapid development of the electronic information industry and the electric power industry, higher requirements are placed on the comprehensive performance of capacitor films, especially the anti-puncture performance. The existing capacitor films are extremely susceptible to wear and puncture by foreign objects during use, causing damage to the film and losing its protective effect. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a polypropylene film for a puncture-resistant capacitor, which solves the problem that the existing capacitor film is easily worn and pierced by foreign objects during use, resulting in damage to the film and loss of its protective effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polypropylene film for a puncture-resistant capacitor, comprising a winding roller, a base film is wound around the surface of the winding roller, a weather-resistant layer is wrapped around the surface of the base film, a reinforcing layer is wrapped around the surface of the weather-resistant layer, and the reinforcing layer comprises a polyethylene film layer, a polypropylene film layer and a hard PVC film layer.

[0006] Preferably, the weather-resistant layer comprises a polyvinyl chloride film layer, a TPU film layer and a polyvinylidene fluoride film layer, and the polyvinyl chloride film layer, the TPU film layer and the polyvinylidene fluoride film layer have the same thickness.

[0007] Preferably, the inner surface of the polyvinyl chloride film layer is wrapped around the outer surface of the TPU film layer, and the inner surface of the TPU film layer is wrapped around the outer surface of the polyvinylidene fluoride film layer.

[0008] Preferably, the polyethylene film layer, the polypropylene film layer and the hard PVC film layer have the same thickness, and the thickness is 0.2 mm-0.4 mm.

[0009] Preferably, the inner surface of the polyethylene film layer is wrapped around the outer surface of the polypropylene film layer, and the inner surface of the polypropylene film layer is wrapped around the outer surface of the hard PVC film layer.

[0010] Compared with the prior art, the utility model provides a polypropylene film for a breakdown resistant capacitor, which has the following beneficial effects:

[0011] The utility model greatly improves the strength of the winding roller itself by arranging the polyethylene film layer, the polypropylene film layer and the hard PVC film layer, avoids the winding roller from being worn and pierced by foreign objects during use, and makes the winding roller have the function of corrosion resistance by arranging the polyvinyl chloride film layer, the TPU film layer and the polyvinylidene fluoride film layer, and can be applied to various harsh environments, avoids the winding roller from being corroded during use, greatly improves the service life of the winding roller, and solves the problem that the existing capacitor film is easily worn and pierced by foreign objects during use, resulting in damage to the film and loss of protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is an exploded view of the base film of the utility model;

[0014] Figure 3 This is an exploded view of the weather-resistant layer of the utility model;

[0015] Figure 4 This is an exploded view of the reinforcement layer of the utility model.

[0016] In the figure: 1. Winding roller; 2. Base film; 3. Weather-resistant layer; 31. Polyvinyl chloride film layer; 32. TPU film layer; 33. Polyvinylidene fluoride film layer; 4. Reinforcement layer; 41. Polyethylene film layer; 42. Polypropylene film layer; 43. Hard PVC film layer. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0018] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1-4 A polypropylene film for a puncture-resistant capacitor includes a winding roller 1, a base film 2 is wound on the surface of the winding roller 1, a weather-resistant layer 3 is wrapped on the surface of the base film 2, a reinforcing layer 4 is wrapped on the surface of the weather-resistant layer 3, and the reinforcing layer 4 includes a polyethylene film layer 41, a polypropylene film layer 42 and a hard PVC film layer 43.

[0021] The weather-resistant layer 3 comprises a polyvinyl chloride film layer 31 , a TPU film layer 32 and a polyvinylidene fluoride film layer 33 , and the polyvinyl chloride film layer 31 , the TPU film layer 32 and the polyvinylidene fluoride film layer 33 have the same thickness.

[0022] The inner surface of the polyvinyl chloride film layer 31 is wrapped around the outer surface of the TPU film layer 32 , and the inner surface of the TPU film layer 32 is wrapped around the outer surface of the polyvinylidene fluoride film layer 33 .

[0023] The polyethylene film layer 41 , the polypropylene film layer 42 and the hard PVC film layer 43 have the same thickness, and the thickness is 0.2 mm-0.4 mm.

[0024] The inner surface of the polyethylene film layer 41 is wrapped around the outer surface of the polypropylene film layer 42 , and the inner surface of the polypropylene film layer 42 is wrapped around the outer surface of the hard PVC film layer 43 .

[0025] The working principle of the utility model is as follows: by arranging the polyethylene film layer 41, the polypropylene film layer 42 and the hard PVC film layer 43, the strength of the winding roller 1 itself is greatly improved, and the winding roller 1 is prevented from being worn and pierced by foreign objects during use; by arranging the polyvinyl chloride film layer 31, the TPU film layer 32 and the polyvinylidene fluoride film layer 33, the winding roller 1 has a corrosion-resistant function and can be applied to various harsh environments, and the winding roller 1 is prevented from being corroded during use, which greatly improves the service life of the winding roller 1, and solves the problem that the existing capacitor film is easily worn and pierced by foreign objects during use, resulting in damage to the film and loss of protective effect.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polypropylene film for a punch-through capacitor, comprising a winding roller (1), characterized in that: The surface of the winding roller (1) is wound with a base film (2), the surface of the base film (2) is wrapped with a weather-resistant layer (3), the surface of the weather-resistant layer (3) is wrapped with a reinforcing layer (4), and the reinforcing layer (4) comprises a polyethylene film layer (41), a polypropylene film layer (42) and a hard PVC film layer (43).

2. The polypropylene film for a punch-through capacitor according to claim 1, characterized in that: The weather-resistant layer (3) comprises a polyvinyl chloride film layer (31), a TPU film layer (32) and a polyvinylidene fluoride film layer (33), and the polyvinyl chloride film layer (31), the TPU film layer (32) and the polyvinylidene fluoride film layer (33) have the same thickness.

3. The polypropylene film for a punch-through capacitor according to claim 2, characterized in that: The inner surface of the polyvinyl chloride film layer (31) is wrapped around the outer surface of the TPU film layer (32), and the inner surface of the TPU film layer (32) is wrapped around the outer surface of the polyvinylidene fluoride film layer (33).

4. The polypropylene film for a punch-through capacitor according to claim 1, characterized in that: The polyethylene film layer (41), the polypropylene film layer (42) and the hard PVC film layer (43) have the same thickness, and the thickness is 0.2 mm to 0.4 mm.

5. The polypropylene film for a punch-through capacitor according to claim 1, characterized in that: The inner surface of the polyethylene film layer (41) is wrapped around the outer surface of the polypropylene film layer (42), and the inner surface of the polypropylene film layer (42) is wrapped around the outer surface of the hard PVC film layer (43).

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