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Mixed polytetrafluoroethylene powder, polytetrafluoroethylene porous shaped body, methods for producing those, polytetrafluoroethylene porous foam shaped body, and product for high-frequency signal tr

A technology of polytetrafluoroethylene powder and polytetrafluoroethylene, which is applied in the field of high-frequency signal transmission products, can solve the problems of inability to obtain a molded body, burrs on the surface of insulating materials, etc.

Active Publication Date: 2006-10-04
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no description about the production method of expanded polytetrafluoroethylene, a molded body cannot actually be obtained, and burrs are formed on the surface of the insulating material

Method used

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  • Mixed polytetrafluoroethylene powder, polytetrafluoroethylene porous shaped body, methods for producing those, polytetrafluoroethylene porous foam shaped body, and product for high-frequency signal tr

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0225] Spread 1kg of PTFE resin molding powder (TFE homopolymer, SSG 2.155, the maximum endothermic peak temperature at one time is 340°C) on a stainless steel tray to a thickness of 20mm, and burn it in an electric furnace at 380°C for 5 hours , to obtain PTFE resin block.

[0226] The obtained mass of PTFE resin was pulverized to an average particle diameter of 50 μm using a pulverizer to obtain a pulverized powder (hereinafter referred to as a gelled powder).

[0227] 160g of the obtained gelled powder (secondary maximum endothermic peak temperature is 327°C), 640g

[0228] PTFE resin fine powder (SSG 2.160, a maximum endothermic peak temperature of 339° C.) and 136 g of an extrusion aid (trade name: ISOPAR G, manufactured by Exxon Shell) were charged into a 5 L polyethylene bottle and mixed by rotating for 10 minutes. Continue to place it in polyethylene bottle for 2 hours to make it mature at 25° C., obtain 800 g of mixed powder (PTFE resin fine powder: gelled powder=77:...

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Abstract

Disclosed is a polytetrafluoroethylene porous shaped body characterized in that it has a specific gravity of 0.9-2.0 and the aspect ratio of pores formed inside the shaped body is not less than 1 and not more than 3.

Description

technical field [0001] The present invention relates to mixed polytetrafluoroethylene powder and polytetrafluoroethylene porous molded body, their production method, polytetrafluoroethylene porous foam molded body and products for high-frequency signal transmission. Background technique [0002] In order to increase the transmission speed of high-frequency signal transmission products such as coaxial cables, LAN cables, and printed circuit boards, and reduce dielectric loss, insulating materials with a dielectric constant (ε) as low as possible are selected. As the resin constituting the insulating material, fluorine-containing resin is preferably used because it has a low dielectric constant and a low dielectric loss tangent (tan δ), which not only contributes to the reduction of dielectric loss, but also is excellent in heat resistance and the like. [0003] It is known that in order to lower the dielectric constant of an insulating material, it is effective to disperse a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/24C08J9/04C08J9/26C08J3/16H01B3/44
CPCC08J2327/18C08J9/24H01B3/445Y10T428/249953
Inventor 泽田又彦吉本洋之笠井俊二田头修二
Owner DAIKIN IND LTD
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