Graphite Paper (flexible Graphite) | Dual Track Essential Material For Electronic Heat Dissipation And Industrial Sealing Graphite Paper

• Many customers cannot distinguish between ultra-thin graphite paper for heat dissipation and thickened graphite paper for sealing, resulting in insufficient heat dissipation and sealing leakage when mixed. Qingdao Jiuzhengyuan Graphite explains the selection criteria for one-time use. Graphite paper is divided into two categories: ultra-thin thermal conductive graphite paper, with a thickness of 0.02-0.2mm, a flat thermal conductivity of 1000-1500W/m · K, weighing only 1/4 of aluminum foil, used for power battery PACK, inverters, lasers, and 5G chip heat dissipation; Thickened sealed graphite paper, 0.5-3mm, compression rebound rate ≥ 18%, high temperature resistance of 550 ℃, separately cut gasket or composite stainless steel foil to make flange sealing gasket.

• Compared to metal heat dissipation materials, graphite paper has a prominent advantage in lightweight design, with a 30% increase in heat dissipation efficiency; Compared to rubber gaskets, the upper temperature resistance limit has been increased by 400 ℃, and it is resistant to strong acids and alkalis without aging. Short board refers to pure graphite paper that is prone to oxidation and pulverization in air above 500 ℃. It is recommended to use composite metal foil for high-temperature sealing. A certain energy storage battery manufacturer originally used aluminum foil for heat dissipation, resulting in a temperature rise of 41 ℃ at full load and a rapid decline in cycle life of the battery cells. Replace the hexagonal 0.1mm ultra-thin flexible graphite paper to fully cover the surface of the battery cells, fill the gaps between the modules with thickened graphite paper, raise the maximum temperature of the battery to 29 ℃, increase the cycle life by 22%, and reduce the weight of the heat dissipation structure by 55%.

• Three key points for purchasing graphite paper to avoid pitfalls:

    1. For heat dissipation, choose high expansion rate ultra-thin graphite paper with a thermal conductivity of ≥ 1000W/m · K;
    2. Choose graphite paper with a thickness of 0.8mm or more for sealing conditions, and the rebound rate should not be less than 18%;
    3. Prioritize 316 stainless steel composite graphite paper in high-temperature open environments to delay oxidation loss.

• At the processing level, Qingdao Jiuzhengyuan Graphite Technology Co., Ltd. supports graphite paper die-cutting irregular gaskets, adhesive backed thermal conductive graphite sheets, and metal composite graphite sheets. Bulk supply can provide free sample condition testing, suitable for electronic heat dissipation, petrochemical pipelines, and valve sealing in all scenarios.