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Double-sided polyimide film with electromagnetic wave absorption function

A technology of polyimide film and electromagnetic wave absorption, which is applied in the field of filter materials, can solve the problems that the filter coating has no PI film protection, the filter performance needs to be strengthened, the thickness of the silk screen coating is thick, etc., and the production process is simple and easy, Excellent physical properties, electromagnetic wave absorption function, high temperature resistance effect

Inactive Publication Date: 2019-01-15
苏州铂韬新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic wave-absorbing film provided by this patent is screen-printed with high-temperature-resistant filter ink on the PI film to solve the problem of high-temperature resistance. However, since the filter coating of the silk screen is not protected by the PI film, it cannot meet the requirements of high wear resistance and high corrosion resistance; The thickness of the layer is relatively thick, and it is at a disadvantage when used in light and thin electronic equipment. The thickness of the high-temperature filter ink for silk screen printing is relatively thin, and there is no PI film protection. The wear resistance, corrosion resistance, and filter performance need to be strengthened.

Method used

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  • Double-sided polyimide film with electromagnetic wave absorption function

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preparation example Construction

[0048] Simultaneously, the present invention also provides a kind of preparation method of double-sided polyimide film with electromagnetic wave absorption function, and described preparation method comprises the following steps:

[0049] 1) Use an organic solvent to dissolve the binder in the reactor to make colloid A with a viscosity of 200-800mPa.s;

[0050] 2) Add colloid A, absorbent and additives to a vacuum mixer and stir for 60 to 180 minutes to make a filter coating;

[0051] 3) Take two polyimide substrate films, apply the filter coating evenly on one side of the polyimide substrate film on the coating equipment, and dry in an oven to obtain a single-layer polyimide substrate film layer ;

[0052] 4) Laminate the two polyimide substrate film layers coated with the filter coating at high temperature according to the combination of the polyimide substrate film on the outside and the filter coating on the inside, at a temperature of 130 to 160°C. The pressure is 0.5-1...

Embodiment 1

[0064] The PI film with a thickness of 0.3mil is selected as the polyimide substrate film layer 1, and the filter coating 2 slurry is prepared and coated on the polyimide substrate film layer 1, the composition of the filter coating 2 and the weight of each component The number of copies is as follows:

[0065]

[0066] According to the above steps, sample 1 with a total thickness of 1mil and a filter coating 2 with a thickness of 0.4mil were prepared

Embodiment 2

[0072] Select the PI film of 0.3mil thickness as the polyimide substrate film layer 1, prepare filter coating 2 and be coated on PI substrate, the composition of filter coating 2 and the parts by weight of each component are as follows:

[0073]

[0074] Sample 3 with a total thickness of 1mil and a filter coating thickness of 0.4mil was prepared following the above steps

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Abstract

The invention provides a double-sided polyimide film with electromagnetic wave absorption function and a preparation method thereof. The film comprises: two polyimide substrate film layers; and filtering coatings respectively coated on the opposite sides of the two polyimide substrate film layers. The filtering coating coated sides of the polyimide substrate film layers are in lamination connection. The double-sided polyimide film with electromagnetic wave absorption function provided by the invention has the advantages of high resistivity, low density, high toughness, wear resistance, high temperature resistance, corrosion resistance, good filtering performance and excellent dimensional stability.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a double-sided polyimide film with the function of absorbing electromagnetic waves. Background technique [0002] Polyimide (PI) film has special properties such as high strength, high toughness, wear resistance, high temperature resistance, and corrosion resistance. It can meet the design requirements of light, thin, short, and small. It is a high-temperature resistant film with competitive advantages. Insulation Materials. After more than 40 years of development, it has become one of the important raw materials for electronic and electrical products. The electronic field is widely used in flexible boards, semiconductor packaging, photovoltaic (solar energy) energy, liquid crystal displays, etc., while the electrical field is mainly used in aerospace, military, and machinery. , cars, etc. [0003] At the same time, in the field of electronics, with the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B33/00B32B37/06B32B37/10B32B38/00C09D133/04C09D5/32
CPCB32B27/281B32B33/00B32B37/06B32B37/10B32B38/00B32B2038/0076B32B2255/10B32B2255/20B32B2307/20B32B2307/306B32B2307/51B32B2307/554B32B2307/558B32B2307/714B32B2307/72C08K3/042C08K2003/0843C08K2003/085C08K2003/0856C08K2003/0862C09D5/32C09D133/04
Inventor 宋大成刘慧远
Owner 苏州铂韬新材料科技有限公司