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Phenol aldehyde paper board series |
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| H3024—4phenolic paper potential device board （H3024—5 bakelite board ） |
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| This product is a kind of laminated board formed through heat processing by bleaching wood pulp dips into PF resins, used for all kinds of potential device and as printed wiring board pad. |
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| 2 ．Technical requirement |
2.1 Outside appearance
The surface should be flat and smooth, color is in uniformity, does not allow any impurity, bubble, pitting & knob spot on it. There is no black spot at basic material. The heavy scrape and nick is not allowed. The edge is cut tidy and the end surface has no crackle, delamination or slag dropping.
2.2 Main performance index
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| H3024-4 |
H3024-5 |
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| Table 1 ： Performance index |
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Sr. |
Index name |
Unit |
Index |
1 |
Warp or distort |
Mm |
≤10 |
2 |
Water absorption rate |
% |
≤4.8 |
3 |
Insulation resistance |
Normal status |
Ω |
≥1.0×109 |
After boiling |
≥1.0×107 |
4 |
Water absorbing expansion rate |
Portrait |
% |
≤0.3 |
Cross direction |
≤0.5 |
5 |
Heat resistant performance |
A：210℃15Min |
% |
No delamination or bubble. |
B： portrait size changes after damped. |
≤0.35 |
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| Note: For additional technical requirement，the color can be negotiated by supplier and purchaser. |
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