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Low dielectric sheet for 2-d communication, production method therefor, and sheet structure for communication

A manufacturing method and low-dielectric technology, applied in the direction of cable insulation structure, circuit, insulator, etc., can solve the problems of communication performance degradation, information leakage, complicated cable wiring, etc., and achieve the effect of communication performance improvement and simple method

Inactive Publication Date: 2012-07-04
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in one-dimensional communication, the wiring of cables is complicated, and especially in offices where a large amount of work is performed, handling and storage of cables becomes a problem
In addition, in three-dimensional communication, such problems are eliminated by not using cables, but the following problems have been pointed out: there is a risk of information leakage due to signal propagation in space, and interference with surrounding equipment
Among them, it is recorded that the dielectric loss tangent of the middle layer in the range of 800 MHz to 5 GHz is set to be 0.01 or less. If this value is exceeded, electromagnetic energy cannot exist inside the sheet, and energy loss occurs, thereby greatly reducing communication performance.

Method used

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  • Low dielectric sheet for 2-d communication, production method therefor, and sheet structure for communication
  • Low dielectric sheet for 2-d communication, production method therefor, and sheet structure for communication
  • Low dielectric sheet for 2-d communication, production method therefor, and sheet structure for communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Polypropylene [melt flow rate (MFR) at 200°C: 0.35g / 10min] was kneaded at 200°C using a twin-screw kneader manufactured by Japan Steel Works (JSW), and then extruded It is in the form of strands, cut and shaped into granules after water cooling.

[0115] The pellets were put into a single-screw extruder manufactured by Nippon Steel Works Co., Ltd., and heated at 13 (12 after injection) MPa / cm in an atmosphere of 220° C. 3 The pressure is injected with carbon dioxide gas. Carbon dioxide gas was injected at a rate of 9.5% by weight relative to the total amount of the polymer. After fully saturating the carbon dioxide gas, it was cooled to a temperature of 170° C. suitable for foaming, and extruded from a die to obtain a resin foam. Next, this resin foam was sliced ​​to obtain a low-dielectric sheet for two-dimensional communication with a thickness of 1.0 mm.

Embodiment 2

[0117] Using a twin-screw kneader manufactured by Japan Steel Works (JSW), at a temperature of 200°C, 45 parts by weight of polypropylene [melt flow rate (MFR) at 200°C: 0.35g / 10min], 45 parts by weight 10 parts by weight of polyolefin-based elastomer [melt flow rate (MFR) at 200° C. (MFR): 0.35 g / 10 min, JIS A hardness: 79 degrees], 10 parts by weight of magnesium hydroxide, 10 parts by weight of carbon (trade name "Asahi #35 "asahi carbon co., ltd. manufacture) and 10 parts by weight of monoglyceride stearate are kneaded, extruded into strands, cut off after water cooling and formed into granules.

[0118] The pellets were put into a single-screw extruder manufactured by Nippon Steel Works, and heated at 13 (12 after injection) MPa / cm in an atmosphere of 220°C. 3 pressure, inject carbon dioxide gas. Carbon dioxide gas was injected at a rate of 5.6% by weight relative to the total amount of the polymer. After fully saturating the carbon dioxide gas, it was cooled to a tempe...

Embodiment 3

[0120] Using a twin-screw kneader manufactured by Japan Steel Works (JSW), at a temperature of 200°C, 45 parts by weight of polypropylene [melt flow rate (MFR) at 200°C: 0.35g / 10min], 45 parts by weight 1 part by weight of polyolefin-based elastomer [melt flow rate (MFR) at 200°C (MFR): 0.35 g / 10 min, JIS A hardness: 79 degrees], 120 parts by weight of magnesium hydroxide, 10 parts by weight of carbon (trade name "Asahi #35 "asahi carbon co., ltd. manufacture) and 10 parts by weight of monoglyceride stearate are kneaded, extruded into strands, cut off after water cooling and formed into granules.

[0121] The pellets were put into a single-screw extruder manufactured by Nippon Steel Works, and heated at 13 (12 after injection) MPa / cm in an atmosphere of 220°C. 3 pressure, inject carbon dioxide gas. Carbon dioxide gas was injected at a rate of 6.3% by weight relative to the total amount of the polymer. After fully saturating the carbon dioxide gas, it was cooled to a temperat...

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Abstract

Disclosed are: a low dielectric sheet which is used for 2-D communication, can be used in a sheet structure for 2-D communication, and has the lowest dielectric constant and dielectric loss tangent to date; a production method therefor; and a 2-D communication structure using the dielectric sheet for 2-D communication. Specifically disclosed is a low dielectric sheet which is used for 2-D communication and is characterized by having a density of 0.01 to 0.2 g / cm3 and a dielectric constant of no more than 1.6. In particular, a foam that comprises air bubbles and has a dielectric loss tangent of no more than 0.01 is preferred.

Description

technical field [0001] The present invention relates to a low-dielectric sheet for two-dimensional communication constituting a communication medium used in two-dimensional communication and a method for manufacturing the same, and to a sheet structure for communication using the low-dielectric sheet for two-dimensional communication. Background technique [0002] Conventionally, one-dimensional communication by connecting an ISDN line or a LAN cable, and three-dimensional communication using radio waves such as wireless LAN or infrared rays have been used as communication technologies. With the development of such communication technologies, it is possible to connect to the Internet anywhere in the home or office, thereby enabling information exchange. [0003] However, in one-dimensional communication, cable routing is complicated, and especially in offices where a large amount of work is performed, handling and storage of cables becomes a problem. In addition, in three-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/00H04B5/02H01B3/00H04B5/48
CPCH01B3/00H04B5/02H01B3/44H04B13/00Y10T428/249976H01B3/30H01B11/1839H04B5/48
Inventor 儿玉清明斋藤诚请井博一富田俊彦
Owner NITTO DENKO CORP