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Sponge type directionally-conductive rubber and preparation method thereof

A conductive rubber and sponge technology, applied in the field of conductive rubber, can solve the problems of long-term use of equipment, inability to meet lightweight requirements, unbalanced compression ratio, etc., to avoid the reduction of electrical properties, reduce density, and improve mechanical strength.

Active Publication Date: 2020-03-20
NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problem of high density of conductive rubber with a solid structure, it cannot meet the lightweight requirements of modern information equipment; on the other hand, the rubber composite material with a solid structure has a low compression rate. There will be unbalanced compression ratio at the screw fastening part and the screw interval part, resulting in warping of the cover plate, which will have an adverse effect on the long-term use of the equipment

Method used

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  • Sponge type directionally-conductive rubber and preparation method thereof
  • Sponge type directionally-conductive rubber and preparation method thereof
  • Sponge type directionally-conductive rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Wire arrangement: fix the wavy Monel wires on the frame at equal distances, the diameter of the Monel wires is 0.12mm, the distance between the metal wires is 1mm, and the thickness of the fixed frame is 1mm.

[0037] (2) Pretreatment: Use the spraying process to evenly spray the prepared coupling agent solution on the surface of the Monel silk, the spray gun pressure is 0.2MPa, and the spraying time is 30s. After the spraying is completed, put the Monel silk into the oven and set the temperature at 125°C. Dry for 2 hours, the coupling agent is silane coupling agent kh560, and the concentration of the configuration solution is 5%.

[0038] (3) Frame fixing: The pretreated Monel wire frames are tightly stacked in the mold along the same direction, the stacking length is 0.8m, and the gaps are sealed with a sealant after sealing.

[0039] (4) Pouring molding: Inject silicone rubber into the mold with a glue injection machine. After pouring, vulcanize at room temperatu...

Embodiment 2

[0042] (1) Arranging wires: fix the wavy tinned phosphor bronze wires on the frame at equal distances, the diameter of the tinned phosphor bronze wires is 0.1mm, the distance between the wires is 1mm, and the thickness of the fixed frame is 1mm.

[0043] (2) Pretreatment: Spray the prepared coupling agent solution evenly on the surface of tin-plated phosphor bronze wire by spraying process, the spray gun pressure is 0.2MPa, and the spraying time is 30s. After spraying, put the tin-plated phosphor bronze wire into the oven to set The temperature is 130°C, and it is dried for 3 hours. The coupling agent is silane coupling agent kh560, and the concentration of the configuration solution is 5%.

[0044] (3) Frame fixing: The pretreated tin-plated phosphor bronze wire frames are tightly stacked in the mold along the same direction, the stacking length is 1m, and the gaps are sealed with a sealant after sealing.

[0045] (4) Pouring molding: Inject silicone rubber into the mold with...

Embodiment 3

[0048] (1) Wire arrangement: fix the wavy aluminum alloy wires on the frame at equal distances, the diameter of the aluminum alloy wires is 0.15mm, the distance between the aluminum alloy wires is 1mm, and the thickness of the fixed frame is 1mm.

[0049] (2) Pretreatment: Spray the prepared coupling agent solution evenly on the surface of the aluminum alloy wire by spraying process, the spray gun pressure is 0.2MPa, and the spraying time is 30s. Dry for 4 hours, the silane coupling agent kh560 is used as the coupling agent, and the concentration of the configuration solution is 5%.

[0050] (3) Frame fixing: The pretreated aluminum alloy wire frames are tightly stacked in the mold along the same direction, the stacking length is 1m, and the gaps are sealed with a sealant after sealing.

[0051] (4) Pouring molding: Inject silicone rubber into the mold with a glue injection machine. After pouring, vulcanize at room temperature for 48 hours. The silicone rubber is Hangzhou Zhij...

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Abstract

The invention relates to the field of conductive rubber, specifically to sponge-type directionally-conductive rubber and a preparation method thereof. According to the invention, liquid foamed silicone rubber is used as a rubber matrix and comprises a foaming agent, a vulcanizing agent, color paste and other assistants; the rubber matrix is vulcanized to form a spongy structure; metal wires are uniformly arranged in the rubber matrix to serve as a conductive carrier; and the surfaces of the continuous metal wires are subjected to spraying treatment with a coupling agent. The preparation methodfor the sponge type directionally-conductive rubber comprises the following five steps: wire arrangement, pretreatment, frame fixation, casting molding and cutting. The sponge type directionally-conductive rubber prepared by the invention has the advantages of low density, good flexibility, good corrosion resistance, stable electrical property and the like, can be popularized and applied to the fields of consumer electronics, military communication, aerospace and the like, and realizes an electromagnetic protection function of a product.

Description

technical field [0001] The invention relates to the field of conductive rubber, in particular to a sponge-type oriented conductive rubber and a preparation method thereof. Background technique [0002] Conductive rubber refers to a kind of conductive functional material prepared by mixing conductive filler and rubber matrix and then vulcanized. Among them, the conductive rubber prepared by filling silicone rubber with silver-plated metal powder as conductive filler has been industrialized, and its volume resistivity is ≤ 0.01Ω·cm, at the same time, it has the characteristics of high and low temperature resistance and corrosion resistance of silicone rubber, and has been widely used in aerospace, automotive industry, consumer electronics, military communications and other fields that require electromagnetic protection. [0003] Traditional conductive rubber products are compounded by rubber matrix materials, conductive fillers (including metal silver powder, carbon black, sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K9/00C08K9/10C08K7/24C08K7/26C08J9/04B29C39/10B29C35/02B29C39/22
CPCC08J9/04B29C39/10B29C35/02B29C39/22C08J2383/04C08K9/00C08K9/10C08K7/24C08K7/26
Inventor 董春雨王月祥王执乾杨晓炯
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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