The plastics division of General Electric Co., Ltd. has recently developed a white product "Ultem WH217" of polyetherimide (PEI) film "Ultem" for bar code labels. By coloring, it is possible to avoid seeing the substrate and the print contrast ratio is as high as 98%, so that the barcode can be accurately read. In the past, surface coatings were applied to avoid bar code transparency. WH217 doesn't need this process.
WH217 does not contain halogenated additives and its flame retardance meets the "UL94VTM-0" standard. Higher than polyethylene naphthene resin (PEN) film and polyvinyl fluoride film. In addition, the dimensional stability is higher than the polyvinyl fluoride film. Because it complies with the RoHS (Restriction of the use of certain Hazardous Substances in electrical and electronic equipment) Act, it is applicable to electronic devices.
In addition, due to the high scratch strength of the product, the label is not easily damaged during processing. Moreover, it has high heat resistance, so it can be used in products such as printed circuit boards used in harsh environments. Due to the uniform thickness, it is possible to easily and evenly apply the clear coating required for the printing of label adhesives and special inks.