Manufacturing process of heat-dissipating fin
A manufacturing process and technology of heat sinks, applied in cooling/ventilation/heating transformation, modification by conduction heat transfer, pressing rollers, etc., can solve the problem of uneven quality and performance of polyimide film products, affecting heat dissipation and double-sided film heat dissipation performance, product heat dissipation performance instability and other issues, to achieve the effect of improving flatness, improving flexibility, and improving crystallinity
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[0024] Embodiment: a kind of manufacturing process of heat sink, described graphite heat sink is obtained through the following steps:
[0025] Step 1, coating the graphite modifier respectively on the upper and lower surfaces of the polyimide film to obtain the treated polyimide film, the treated polyimide film is composed of the polyimide film, the first coating layer and the second coating layer composition;
[0026] Described graphite modifier is made up of the component of following parts by weight:
[0027] 22 parts of benzophenone tetraacid dianhydride,
[0028] 15 parts of pyromellitic dianhydride,
[0029] 20 parts of diaminodiphenylmethane,
[0030] 21 parts of dimethylformamide,
[0031] 8.5 parts of N-methylpyrrolidone,
[0032] 2.2 parts of ethylene glycol,
[0033] 2.4 parts of polydimethylsiloxane,
[0034] 0.8 parts of dibutyl phthalate;
[0035] Step 2. Under the protection of an inert gas, the treated polyimide film is raised from room temperature to ...
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