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The crystallinity of a heat sealed region of corona treated poly propylene film was determined by differential scanning calorimetry (DSC). The profile of thermograms of a film's sealed region diners from that of an unsealed region. The percent crystallinity of the heat sealed polypropylene...
The steady-state permeability experiment is the method recom mended to evaluate the barrier properties of polymeric films which are ex pressed as a permeability coefficient (Hernandez et al., 1986). Besides the permeability coefficient, the diffusion coefficient can also be determined from the...
SiO x thin films continue to be developed for polymeric flexible substrates. During the past year significant progress has been made on plasma deposition onto PET, LDPE, BOPP and BON polymer films. In addition, the first two 1.5 meter wide plasma roll coaters were completed and installed. The...
The effect of temperature and relative humidity on the permea tion of ethyl acetate vapor through silica deposited polyethylene terephthalate film (SiO x PET) and composite structures was studied by a quasi-isostatic proce dure. For comparison, the permeation of ethyl acetate vapor through an...
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