Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method and application of polyimide film

A polyimide film and polyamic acid technology, which is applied to antennas, antenna supports/installation devices, electrical components, etc., can solve the problem of laser powder dispersibility and mechanical-related performance decline, unable to meet the special structure of the antenna, and the yield problems such as lowering, to avoid internal and surface defects, good bending performance, and improve the yield

Pending Publication Date: 2020-03-27
南京湘珀新材料科技有限公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. During the spraying and curing process of the coating, it is easy to produce more unpredictable internal and surface defects of the coating, which directly leads to a decline in the yield;
[0007] 4. There is no interfacial bonding between the laser powder and the matrix resin, which will lead to a decrease in the dispersion and mechanical properties of the laser powder;
[0008] 5. When the coating is used as an antenna in a modern mobile communication device, it is difficult to prepare and cannot meet the special structure of the antenna in a modern communication device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of polyimide film
  • Preparation method and application of polyimide film
  • Preparation method and application of polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Prepare the required raw materials, take 3g of laser powder and 6g of N,N-dimethylformamide (hereinafter referred to as DMF) in a mortar, fully grind and pass through a 400-mesh screen to obtain a grinding slurry. The grinding slurry was uniformly dispersed with 60 g DMF for 24 h to obtain a dispersed slurry.

[0037](2) Put 60g DMF, 12.01g 4,4-diaminodiphenyl ether (0.06mol), 0.3g BYK-044 and 57.5g dispersing slurry in a 250mL three-neck bottle, and wait until all 4,4-diaminodiphenyl ether is dissolved Then, 13.09 g of pyromellitic dianhydride (0.06 mol) was added to the reaction system in batches, and the system viscosity reached 1600 poise after fully reacting for 3 hours to terminate the reaction. The whole process of the reaction was completed in a nitrogen atmosphere, and the temperature should be controlled at 0 °C.

[0038] (3) After defoaming the mixed solution synthesized in situ, cast it on a casting machine to form a film (the wet film thickness is cont...

Embodiment 2

[0042] (1) Take 3g of laser powder, 6g of DMF and 1g of dispersant BYK-ATU in a mortar, fully grind and pass through a 400-mesh screen to obtain a grinding slurry. The grinding slurry was uniformly dispersed with 60 g DMF for 24 h to obtain a dispersed slurry.

[0043] (2) Place 60g DMF, 12.01g 4,4-diaminodiphenyl ether (0.06mol), 58.3g dispersing slurry and 0.3g BYK-044 in a 250mL three-necked bottle, and wait until all 4,4-diaminodiphenyl ether is dissolved Then, 13.09 g of pyromellitic dianhydride (0.06 mol) was added to the reaction system in batches, and the system viscosity reached 1600 poise after fully reacting for 3 hours to terminate the reaction. The whole process of the reaction was completed in a nitrogen atmosphere, and the temperature should be controlled at 0 °C.

[0044] (3) The mixed solution synthesized in situ is defoamed and casted on a casting machine to form a film (the wet film thickness is controlled to be 350 μm or the dry film thickness is controlle...

Embodiment 3

[0046] (1) Take 4g of laser powder, 8g of DMF and 1.3g of dispersant BYK-ATU in a mortar, fully grind and pass through a sieve (400 mesh). The grinding slurry and 60 g DMF were uniformly dispersed by a disperser for 24 hours to obtain a dispersed slurry.

[0047] (2) Put 60g DMF, 12.01g 4,4-diaminodiphenyl ether (0.06mol), 69g dispersing slurry and 0.3g BYK-044 in a 250mL three-necked bottle, wait until all 4,4-diaminodiphenyl ether is dissolved , 13.09g of pyromellitic dianhydride (0.06mol) was added to the reaction system in batches, and the system viscosity reached 1600 poise after the diamine and dianhydride were fully reacted for 3h to terminate the reaction. The whole process of the reaction was completed in a nitrogen atmosphere, and the temperature should be controlled at 0 °C.

[0048] (3) The in-situ synthesized mixed solution is defoamed and coated on a glass plate to form a film (the wet film thickness is controlled to be 350 μm or the dry film thickness is contro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method and an application of a polyimide film capable of metal patterning. The preparation method specifically comprises the following steps: (1) preparing required raw materials, and mixing a solvent with 2-19 parts by mass of laser powder to obtain dispersed slurry; (2) fully stirring and uniformly mixing a solvent, the dispersed slurry and 80-97 parts by mass of polyamide acid to obtain a product A; or transferring a solvent, the dispersed slurry and diamine into a container, and adding dianhydride for reaction until a product B is completely obtained,the total mass of dianhydride and diamine being 80-97 parts; and (3) after the product A or the product B is subjected to film formation, obtaining a polyimide film capable of metal patterning throughimidization. The polyimide film can be applied to preparation of antennas of mobile communication terminals. The polyimide film prepared by the method has good bending performance and high yield, thepreparation process can be fully automatic, and the polyimide film is convenient to store and assemble.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, in particular to a preparation method and application of a polyimide film. Background technique [0002] In recent years, the size of mobile communication equipment has become smaller and smaller, leaving less space for electronic components inside the mobile phone. The rapid development of 5G technology has also put forward higher and higher requirements for the antenna performance of communication equipment. [0003] The mobile phone antenna in the traditional technology is made by LDS (Laser Direct Structuring). Usually, laser powder is added to a certain resin (such as varnish), and some additives (such as leveling agent) are dispersed in a high-speed disperser to obtain a Laser-activatable paint, which is then laser-activated and metallized (electroless plating) to become an antenna. However, traditional coatings have the following defects in the use process: [0004] 1. The pain...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L79/08C08K9/06C08K9/04C08J5/18C08G73/10H01Q1/24
CPCC08G73/1007C08G73/1039C08G73/1067C08G73/1071C08G73/1078C08J5/18C08J2379/08C08K9/04C08K9/06H01Q1/243
Inventor 雷霆杨阳詹振翔吴运香
Owner 南京湘珀新材料科技有限公司