Polyester film, laminate using same, and structure comprising same and sealing layer
A technology of polyester film and laminate, which is applied in the field of polyester film, laminate and structure, can solve the problems of difficulty in deep drawing forming and insufficient formability, and achieve good forming followability, wrinkle suppression and Excellent warpage resistance, delamination suppression effect
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Embodiment
[0077] (Evaluation method)
[0078] Production and evaluation of the polyester film were performed by the following methods.
[0079] (1) Composition of polyester
[0080] Dissolve polyester resin and film in hexafluoroisopropanol (HFIP), use 1 H-NMR and 13 C-NMR quantifies the content of each monomer residue and diethylene glycol produced as a by-product.
[0081] (2) Film thickness, layer thickness
[0082] When measuring the thickness of the whole film, the film was cut into 200 mm x 300 mm using a dial gauge, and the thickness of each sample was measured at arbitrary five locations, and the average value was calculated|required. In addition, the thickness of each layer of the laminated film was obtained by embedding the film in epoxy resin, cutting the cross-section of the film using a microtome, and using a transmission electron microscope (TEM H7100 manufactured by Hitachi, Ltd.) at 5000 times Observe the section at magnification.
[0083] (3) Average particle size...
manufacture example
[0124] (13) Wrinkles after forming
[0125] The outline of the structure molded without damage in (10) mold followability evaluation is shown in figure 1 . First, the thicknesses of (a) and (a)' are measured. The thinner one of (a) and (a)' is taken as the reference thickness. Next, at a distance figure 1 (b), (c), (d), (e) (located in the convex part of the molded structure and 5 mm inside the end of the convex part) 15 mm (f), (g), (h ), (i), (j), (k), (l), (m), measure (f)-(g), (h)-(i), (j)-(k) , The thickness between (l)-(m), determine wrinkles as follows.
[0126] A: Relative to the standard thickness, the thickness between (f)-(g), (h)-(i), (j)-(k), and (l)-(m) is ±10% or less .
[0127] C: Among the thicknesses between (f)-(g), (h)-(i), (j)-(k), and (l)-(m), at least one of the thicknesses is greater than the reference thickness. ±10% of the thickness of the site.
[0128] (14) The total value of the heat shrinkage rate at 150°C in the width direction and lengt...
Embodiment 1～11
[0141] (Polyester A) Examples 1-11, Comparative Examples 1-3
[0142] Polyethylene terephthalate resin ( Intrinsic viscosity 0.65).
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Abstract
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