Method of manufacturing biaxially oriented polyester film web
A technology of biaxial stretching and polyester film roll, which is applied in the direction of flat products, household utensils, and other household utensils. barrier effect
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Embodiment 1
[0063] PET (relative viscosity: 1.38) containing 0.1% by mass of silica with an average particle size of 1.0 μm was melted with an extruder, extruded from a T-die at 280°C, and bonded by applying static electricity Quenching was performed on a cooling drum whose surface temperature was adjusted to 20° C. to obtain an unstretched film with a thickness of 200 μm. After the unstretched film is preheated with a preheating roll set whose temperature is adjusted to 70°C, it is wound to a stretching roll whose temperature is adjusted to 90°C and a cooling roll whose temperature is adjusted to 40°C, and the stretching roll and cooling roll are changed The peripheral speed is stretched longitudinally to 4 times. Thus, a longitudinally stretched film having a thickness of 50 μm was obtained.
[0064] Apply the easy-adhesive coating agent A at 4g / m with a wire-wound rod 2 The coating amount of is coated on the longitudinally stretched film, and the easy-adhesive coating agent A is drie...
Embodiment 2
[0071]Compared with Example 1, the ambient temperature at the time of drying the easily-adhesive coating agent A by passing through the hot air drying zone was 52° C., and the passing time was 12 seconds. Other than that, it carried out similarly to Example 1, and obtained the biaxially stretched polyester film roll of roll length 36,400m. About the obtained film roll, the processing loss part which arises at the time of vapor deposition processing was removed similarly to Example 1, and the aluminum vapor-deposited polyester film roll of roll length 36000m was obtained.
[0072] About the sample for evaluation of the aluminum vapor-deposition film taken from the surface layer part and the roll core part of this aluminum vapor-deposition polyester film roll, the oxygen barrier property and the adhesiveness of the vapor-deposition film were evaluated. The evaluation results are shown in Table 1.
Embodiment 3
[0074] Compared with Example 1, the ambient temperature when the easily-adhesive coating agent A was dried by passing through the hot air drying zone was 68° C., and the passage time was 3 seconds. Other than that, it carried out similarly to Example 1, and obtained the biaxially stretched polyester film roll of roll length 36400m. About the obtained film roll, the processing loss part which arises at the time of vapor deposition processing was removed similarly to Example 1, and the aluminum vapor-deposited polyester film roll of roll length 36000m was obtained.
[0075] About the sample for evaluation of the aluminum vapor-deposition film taken from the surface layer part and the roll core part of this aluminum vapor-deposition polyester film roll, the oxygen barrier property and the adhesiveness of the vapor-deposition film were evaluated. The evaluation results are shown in Table 1.
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Abstract
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