Printed circuits - Import export

CONTAVAL® 2017 is a laminate consisting of E-glass fabric, graphite and epoxy-resin and is used e. g. as a conductive slot filler in machines and also as soldering bath carriers for printed circuits. CONTAVAL® 2017 has excellent mechanical properties and shows conductivity parallel and perpendicular to the layers as well as high chemical and temperature resistance.

Sodium Persulfate is an inorganic compound. It is a very useful chemical compound which is made by the electrolytic oxidation of sodium hydrogen sulfate. Its chemical formula is Na2S2O8. Chemical Appearance Sodium Persulfate has the appearance of a white crystalline solid. It is almost non hygroscopic. Chemical Applications and Strengths Sodium Persulfate is an extremely useful chemical compound and therefore, has many industrial applications. Its main applications and strengths are: Sodium Persulfate is most commonly used as a radical initiator for emulsion polymerisation reactions for styrene based polymers such as acrylonitrile butadiene styrene. It is used for fast paced curing of low formaldehyde adhesives. Sodium Persulfate itself is a bleach specifically in hair cosmetics and as a detergent component. It is used as a replacement of ammonium persulfate in etching mixtures for zinc and printed circuit boards.

Ammonium Persulfate has the appearance of a white crystalline solid. It is highly soluble in water. Chemical Applications and Strengths Ammonium Persulfate is an extremely useful chemical compound and therefore, has many industrial applications. Its main applications and strengths are: Ammonium Persulfate is most commonly used as an oxidising agent and a source of radicals. It is a strong oxidising agent that is used in polymer chemistry as an etchant. It is used as a cleaning and bleaching agent. It is used as a radical initiator in the polymerisation of specific alkenes. Important polymers prepared with this include styrene butadiene rubber and polytetrafluoroethylene. Because of its strong oxidising properties it is used to etch copper on printed circuit boards as a ferric chloride solution alternative.