Special in our development is causing the polyolefin blends becoming highly cross-linked and thus gaining a substantially elevated heat survivability.
Polypropylene, our friend since 2001-2002, with melting point of 165 °C, after blending and cross-linking may survive 3-minute exposition to 330 °C
Interestingly, a similar 30 mil thick FR-4 sample leaves the test oven on the same very tray completely carbonized and broken into layers of glass.
Three vertical columns of different irradiation levels BF-260-30 show some discoloration as a function of exposition time.
FR-4 control sample on the top of each column shows more intensive discoloration after 90 seconds exposition.
The longer expositions bring the FR-4 sample to pyrolyze.
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