1. main odor sources: residual solvent, raw material emission (such as resin, auxiliaries)

2. sensory judgment:

3 pieces of glass bottles were prepared, and the printed film, composite membrane and inner membrane were cut into 1 cm wide pieces. They were put into each glass bottle and covered with cork. Then put it in the curing room and bake for about 3 hours, and then tell which smell is close to the smell of the compound film. Determine whether it is a residual solvent or not.

Accurate determination of residual solvents

Qualitative and quantitative detection of gas chromatography: headspace injection

Instrument: gas chromatograph, detector (hydrogen flame detector)

Chromatographic column: 25%FEG - 1500301 organic load, column length 2m, inner diameter 2mm

Carrier: nitrogen gas: hydrogen gas: air

Column temperature: 90 C detector temperature: 150 centigrade gasifier temperature: 150 C