A cap lining material that includes polyethylene naphthalate (PEN) is believed to be the first cap liner to use Kaladex(TM) film from ICI Polyester. The liner is available from Tri-Seal (Blauvelt, NY) and is suitable for PET bottles and PEN polymer bottles.
The technology's not commercial yet, and it certainly has its skeptics. Test results show that thermal and barrier properties are enhanced significantly by blowing PET into heated molds and cooling with LN2 delivered by a unique new system.
Single-facing machinery helps Longview Fibre's Milwaukee plant bond the medium to the liner without pressure marks. Meanwhile, the company's new six-color flexographic press produces images that customers say rival preprint.