Unsaturated polyester resin thermosetting resin. It's liqud made up of unsaturated dibasic acid, saturated Polyalcohol, polyphosphoric polymer and compound unit. It becomes hard indiscerptible plastic by mixing with hardener accelerant, cure crosslinking in normal temperature, or ...

Dongguan Junlang Electronics Co., Ltd. is a company specializing in production of calculators, electronic clocks,office stationeries, LED lights and other gifts souvenirs, which are all open to the global market. It can provide whole flow from design, developing, mould opening, injection ...