CN210325538U - Tensile high-conductivity metallized film - Google Patents

Abstract

The utility model relates to a tensile high-conductivity metallized film, which comprises an insulating layer, wherein the surface of the insulating layer is provided with a composite conductive layer, the composite conductive layer comprises a glass fiber mesh cloth which is connected with the insulating layer into a whole, the cloth surface of the glass fiber mesh cloth is provided with square meshes, and the meshes are filled with a graphene filling layer; the surface of the insulating layer is also provided with an aluminum-plated layer which completely covers the glass fiber mesh cloth and the graphene filling layer, and the edge of the aluminum-plated layer is connected with the insulating layer into a whole. The electric conductive property of the tensile high-conductivity metallized film is good, and the tensile effect is good.

Description

Tensile high-conductivity metallized film

Technical Field

The utility model relates to a high conductivity metallized film of tensile type belongs to condenser technical field.

Background

The metallized film capacitor is a capacitor made by winding an organic plastic film as a medium and a metallized film as an electrode, and the film used in the metallized film capacitor includes polyethylene, polypropylene, polycarbonate, etc., and the film used in the metallized film capacitor includes a winding type and a lamination type. Among them, the polyester film medium and the polypropylene film medium are most widely used.

At present, the volume of a flat core capacitor is small because after a metallized film is wound into a winding core, in order to further reduce the volume, the winding core is generally flattened in a way of hot pressing in the axial direction of the winding core, the flattened winding core has small volume, and internal passenger gas is not discharged in large quantity, which is beneficial to improving the performance of the capacitor; however, due to the problem of the material of the film, the tensile strength of the metallized film is limited, for example, the polypropylene metallized film has a thickness of 150 microns, a thickness of a metal plating layer of 100 microns, a tensile strength MD of 200 to 220MPa and a tensile strength TD of 190 to 205 MPa; because the tensile strength of the existing metallized film is limited, the volume reduction degree of the flattened winding core is not more than 10%, otherwise, the metallized film is easy to crack or even break in the flattening process, and the use requirement of the flat core capacitor cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides a high electric conductivity metallized film of tensile type, and concrete technical scheme is as follows:

a tensile high-conductivity metallized film comprises an insulating layer, wherein a composite conductive layer is arranged on the surface of the insulating layer, the composite conductive layer comprises glass fiber mesh cloth which is connected with the insulating layer into a whole, square meshes are arranged on the cloth surface of the glass fiber mesh cloth, and a graphene filling layer is filled in the meshes; the surface of the insulating layer is also provided with an aluminum-plated layer which completely covers the glass fiber mesh cloth and the graphene filling layer, and the edge of the aluminum-plated layer is connected with the insulating layer into a whole.

According to the technical scheme, the glass fiber gridding cloth is in a gridding structure formed by twisting the first alkali-free glass fiber yarn and the second alkali-free glass fiber yarn, the length direction of the first alkali-free glass fiber yarn is parallel to that of the insulating layer, and the length direction of the second alkali-free glass fiber yarn is perpendicular to that of the insulating layer.

According to the further optimization of the technical scheme, the mesh number of the glass fiber mesh cloth is 4-10 meshes.

According to the further optimization of the technical scheme, the thickness of the graphene filling layer is smaller than that of the glass fiber mesh cloth.

According to the further optimization of the technical scheme, the two sides of the insulating layer are respectively provided with a sawtooth-shaped side structure, each side structure comprises a plurality of rectangular convex parts, and a rectangular groove is formed between every two adjacent convex parts; be provided with the rectangle pin between one side of aluminizing layer and the side structure, the pin is connected as an organic whole with the insulating layer, the tail end of pin is connected as an organic whole with the aluminizing layer, pin and convex part one-to-one, the head end of pin extends to the outside of convex part.

According to the further optimization of the technical scheme, the thickness of the pin is smaller than the maximum thickness of the aluminum plating layer.

The electric conductive property of the tensile high-conductivity metallized film is good, and the tensile effect is good.

Drawings

Fig. 1 is a schematic structural view (in a plan view) of the tensile-type high-conductivity metallized film of the present invention;

fig. 2 is a schematic cross-sectional view of the tensile high-conductivity metallized film of the present invention;

fig. 3 is a schematic structural diagram of the insulating layer according to the present invention;

fig. 4 is a schematic structural view of the composite conductive layer according to the present invention;

fig. 5 is a schematic structural diagram of the glass fiber mesh fabric of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, the tensile high-conductivity metallized film includes an insulating layer 10, a composite conductive layer 21 is disposed on a surface of the insulating layer 10, the composite conductive layer 21 includes a glass fiber mesh cloth 211 integrally connected to the insulating layer 10, a square mesh 2113 is disposed on a cloth surface of the glass fiber mesh cloth 211, and a graphene filling layer 212 is filled at the mesh 2113; the surface of insulating layer 10 still is provided with the aluminized layer 22 that covers glass fiber net cloth 211 and graphite alkene filling layer 212 completely, the border and the insulating layer 10 of aluminized layer 22 are connected as an organic whole, aluminized layer 22 is connected as an organic whole with glass fiber net cloth 211.

As shown in fig. 5, the glass fiber mesh cloth 211 is woven by first alkali-free glass fiber yarns 2111 and second alkali-free glass fiber yarns 2112 into a lattice structure, the longitudinal direction of the first alkali-free glass fiber yarns 2111 is parallel to the longitudinal direction of the insulating layer 10, and the longitudinal direction of the second alkali-free glass fiber yarns 2112 is perpendicular to the longitudinal direction of the insulating layer 10.

The insulating layer 10 can be one of a polyethylene film, a polypropylene film and a polycarbonate film, and the insulating layer 10 and the glass fiber mesh cloth 211 can be compositely connected into a whole by hot pressing or can be connected into a whole by hot pressing with an adhesive; the insulating layer 10 can also be made by thermosetting epoxy resin adhesive, the epoxy resin adhesive is coated with a layer of coating on the surface of a release film, then the coating is heated to reach a semi-cured state, then the glass fiber gridding cloth 211 is placed on the surface of the semi-cured coating, graphene powder is filled in the mesh 2113 of the glass fiber gridding cloth 211, then the surface of the glass fiber gridding cloth 211 is covered with a layer of release film, hot pressing is carried out to completely cure the epoxy resin adhesive, and finally the release film, the insulating layer 10 and the composite conducting layer 21 are torn off; wherein, form insulating layer 10 after the epoxy glue solidification, graphite alkene powder can be spread on insulating layer 10 surface and have a large amount of graphite alkene powder can be as an organic whole with insulating layer 10 solidification connection, and the graphite alkene powder that mesh 2113 department was filled can form graphite alkene filling layer 212. Finally, the aluminum-plated layer 22 is manufactured by a vacuum coating process, and the graphene filling layer 212 can be covered by the aluminum-plated layer 22, so that the graphene filling layer 212 is sealed and fixed; the aluminum coating 22 is fixedly combined with the glass fiber mesh cloth 211 and the insulating layer 10, and the combination effect is good. The area of the mesh 2113 cannot be too large, otherwise, the fixing effect between the graphene filling layer 212 and the insulating layer 10 is poor, and the thickness of the graphene filling layer 212 is not more than 50 microns; the area of the mesh 2113 is too small, so that the area occupied by the graphene filling layer 212 is reduced, and the conductivity of the composite conductive layer 21 is affected; therefore, the mesh number of the glass fiber mesh cloth 211 is 4 to 10 meshes. The thickness of the graphene filling layer 212 is smaller than that of the glass fiber mesh cloth 211, so that the aluminum-plated layer 22 at the mesh 2113 can fix the graphene filling layer 212 and the peripheral mesh 2113, and the combination effect is further improved.

The existence of the graphene filling layer 212 can further improve the conductivity of the composite conductive layer 21; the existence of the glass fiber mesh cloth 211 can improve the tensile property of the tensile high-conductivity metallized film; for example, the thickness of the insulating layer 10 is 150 micrometers, the maximum thickness of the aluminum plating layer 22 is 100 micrometers, the tensile strength MD of the tensile high-conductivity metallized film is 285Mpa, and the TD is 275 Mpa; this is much higher than the tensile strength of existing metallizations. Wherein the maximum thickness of the aluminum layer 22 is the thickness of the edge of the aluminum layer 22.

In order to further improve the conductivity, a copper plating layer can be plated on the surface of the glass fiber mesh cloth 211 through a chemical plating process, and the existence of the copper plating layer can not only further improve the combination effect between the first alkali-free glass fiber yarn 2111 and the second alkali-free glass fiber yarn 2112, but also improve the conductivity.

Further, as shown in fig. 1 and 3, two sides of the insulating layer 10 are respectively provided with a sawtooth-shaped side structure 11, the side structure 11 includes a plurality of rectangular convex portions 112, and a rectangular groove 111 is provided between two adjacent convex portions 112; rectangular pins 30 are arranged between one side of the aluminum-plated layer 22 and the corresponding side structure 11, the pins 30 are connected with the insulating layer 10 into a whole, the tail ends of the pins 30 are connected with the aluminum-plated layer 22 into a whole, the pins 30 correspond to the convex portions 112 one by one, and the head ends of the pins 30 extend to the outer sides of the convex portions 112. Due to the existence of the sawtooth-shaped side edge structure 11, the bonding effect between the gold spraying layer and the side edge structure 11 becomes better during the subsequent gold spraying operation; the existence of the pins 30 can further reduce the probability of poor contact between the gold-sprayed layer and the aluminum-plated layer 22, and can further improve the bonding effect between the aluminum-plated layer 22 and the gold-sprayed layer. Wherein, the thickness of the pin 30 is less than the maximum thickness of the aluminum plating layer 22, which makes the bonding effect between the pin 30 and the gold spraying layer better.

In the above examples, the resistance of the tensile-type highly conductive metallized film is 23% to 31% lower than that of the aluminum plating layer, and the tensile-type highly conductive metallized film has good conductivity and tensile effect, as compared with the aluminum plating layer having the same thickness. Compared with the whole graphene film, the graphene filling layer 212 is formed by filling the graphene powder, and is sealed and covered by the aluminum coating layer 22, so that the processing cost is reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A tensile high-conductivity metallized film is characterized in that: the insulating layer (10) is included, a composite conducting layer (21) is arranged on the surface of the insulating layer (10), the composite conducting layer (21) comprises a glass fiber mesh cloth (211) which is connected with the insulating layer (10) into a whole, square meshes (2113) are arranged on the cloth surface of the glass fiber mesh cloth (211), and a graphene filling layer (212) is filled in the positions of the meshes (2113); the surface of insulating layer (10) still is provided with aluminized layer (22) with glass fiber net cloth (211) and graphite alkene filling layer (212) complete cover, the border and insulating layer (10) of aluminized layer (22) are connected as an organic whole.

2. The tensile-type high-conductivity metallized film according to claim 1, wherein: the glass fiber mesh cloth (211) is woven into a grid structure by first alkali-free glass fiber yarns (2111) and second alkali-free glass fiber yarns (2112), the length direction of the first alkali-free glass fiber yarns (2111) is parallel to the length direction of the insulating layer (10), and the length direction of the second alkali-free glass fiber yarns (2112) is perpendicular to the length direction of the insulating layer (10).

3. The tensile-type high-conductivity metallized film according to claim 2, wherein: the mesh number of the glass fiber mesh cloth (211) is 4-10 meshes.

4. The tensile-type high-conductivity metallized film according to claim 1, wherein: the thickness of the graphene filling layer (212) is smaller than that of the glass fiber mesh cloth (211).

5. The tensile-type high-conductivity metallized film according to claim 1, wherein: two sides of the insulating layer (10) are respectively provided with a sawtooth-shaped side structure (11), each side structure (11) comprises a plurality of rectangular convex parts (112), and a rectangular groove (111) is formed between every two adjacent convex parts (112); be provided with rectangle pin (30) between one side of aluminizing layer (22) and side structure (11), pin (30) are connected as an organic wholely with insulating layer (10), the tail end of pin (30) is connected as an organic wholely with aluminizing layer (22), pin (30) and convex part (112) one-to-one, the head end of pin (30) extends to the outside of convex part (112).

6. The method as claimed in claim 5, wherein the step of forming the metal film comprises: the thickness of the pin (30) is less than the maximum thickness of the aluminized layer (22).

Images