Double-sided evaporation metallized film
Technical Field
The utility model belongs to the technical field of metallized film technique and specifically relates to a two-sided evaporation metallized film.
Background
With the wide application of capacitors, some capacitors need to have higher capacitance resistance, and the sheet resistance is an index for measuring the capacitance resistance; the sheet resistance is the sheet resistance, and refers to the resistance between the edges of the surface of the metallized film coating under the condition of the same length and width (namely a square). The existing metallized film generally improves the square resistance value by changing the material of the metallized film, and the metallized capacitor failure phenomenon often occurs in high-frequency energy-saving products, pulse circuits, high-frequency switches and other circuits with larger instantaneous pulse current.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a two-sided evaporation metallization film.
The utility model discloses specifically adopt following technical scheme to realize:
the utility model provides a two-sided evaporation metallization film, includes the base plate, the both sides of base plate are equipped with first metal evaporation coating and second metal evaporation coating respectively, the surface of first metal evaporation coating and second metal evaporation coating still is equipped with first antistatic coating and second respectively and resists the electrostatic coating the edge of base plate, the edge of first metal evaporation coating, the edge of second metal evaporation coating, the edge of first antistatic coating and the edge of second anti-electrostatic coating surely establish to wave type sideband.
Preferably, the amplitude of the wavy sideband ranges from 0.15 mm to 0.25mm, and the wavelength ranges from 0.5 mm to 1.5 mm.
Preferably, the first metal evaporation layer includes a first aluminum layer and a first zinc layer, the first aluminum layer is disposed on one side of the substrate, and the first zinc layer is disposed above the first aluminum layer.
Preferably, the second metal evaporation layer includes a second aluminum layer and a second zinc layer, the second aluminum layer is disposed on the other side of the substrate, and the second zinc layer is disposed above the second aluminum layer.
Preferably, the antistatic diffusion layer is a PMMA/SiO 2 composite nano antistatic coating.
Preferably, the coating weight of the antistatic coating is 30 to 45g/m 2.
The utility model provides a two-sided evaporation metallization film, its beneficial effect lies in: through setting up two-layer metal evaporation coating to increase the wave type sideband in film both sides, greatly increased the area of contact of metal coating side and metal spraying material, improved metal spraying material's adhesive force and availability factor, still improved the whole pulse ability of condenser, further increased the area of contact of metal coating side and metal spraying material.
Drawings
FIG. 1 is a schematic cross-sectional view of a double-sided evaporated metallized film of the present invention.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, the double-sided evaporation metallized film provided by this embodiment includes a substrate 1, a first metal evaporation layer 2 and a second metal evaporation layer 3 are respectively disposed on two sides of the substrate 1, a first antistatic coating 4 and a second antistatic coating 5 are further respectively disposed on outer surfaces of the first metal evaporation layer 2 and the second metal evaporation layer 3, and a wavy side band 6 is cut at an edge of the substrate 1, an edge of the first metal evaporation layer 2, an edge of the second metal evaporation layer 3, an edge of the first antistatic coating 4, and an edge of the second antistatic coating 5.
The amplitude range of the wavy sideband 6 is between 0.15 and 0.25mm, and the wavelength range is between 0.5 and 1.5 mm.
The first metal evaporation layer 2 includes a first aluminum layer 21 and a first zinc layer 22, the first aluminum layer 21 is disposed on one side of the substrate 1, and the first zinc layer 22 is disposed above the first aluminum layer 21. The second metal evaporation layer 3 includes a second aluminum layer 31 and a second zinc layer 32, the second aluminum layer 31 is disposed on the other side of the substrate, and the second zinc layer 32 is disposed above the second aluminum layer 31. The aluminum and the air can generate compact oxides to prevent the inner layer from being oxidized continuously, and the zinc metal is sensitive to atmospheric oxidation and insensitive to electrochemical corrosion; aluminum metal is sensitive to electrochemical corrosion but not sensitive to atmospheric oxidation, and a zinc-aluminum metal film prepared by combining zinc and aluminum and evaporation has the advantages of zinc and aluminum.
The first antistatic coating 4 and the second antistatic coating 5 are PMMA/SiO 2 composite nano antistatic coatings, the coating weight of the antistatic coatings is 30-45g/m < 2 >, and the antistatic capacity of the film is improved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.