Laminated polyester film
A laminated polyester film, polyester film technology, applied in the field of laminated polyester film, can solve the problems of low total light transmittance, difficult adhesive adhesion, low brightness of polarizing plate, etc., and achieve high industrial value , good adhesion and excellent total light transmittance
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Embodiment 1
[0161] The mixed raw materials obtained by mixing polyester (A) and (B) at a ratio of 90% and 10% respectively are used as the raw material of the outermost layer (surface layer), and polyester (A) and (C) are respectively mixed at a ratio of 85% and 15%. The mixed raw materials obtained by mixing in proportion are used as raw materials for the middle layer, and are supplied to 2 extruders respectively, and after each melting at 285°C, two kinds of 3 layers (surface layer / middle layer / surface layer) are formed on the cooling roll set at 40°C. ) layer structure is co-extruded, cooled and solidified to obtain an unstretched sheet. Next, after stretching 3.4 times in the longitudinal direction at a temperature of 85° C. by using the difference in roll rotation speed, the coating solution A1 shown in Table 1 below was applied to one side of the longitudinally stretched film (to form the first coating layer), and Coating liquid B1 shown in Table 2 below was applied on the reverse s...
Embodiment 2～19
[0163] In Example 1, except changing the coating agent composition to the coating agent composition shown in Table 1 and Table 2, it manufactured similarly to Example 1, and obtained the polyester film. The prepared polyester film is shown in Table 3.
Embodiment 20
[0165] The mixed raw material obtained by mixing polyester (A) and (B) in a ratio of 90% and 10% respectively is used as the raw material of the outermost layer (surface layer), and polyester (A) and (C) are respectively mixed in a ratio of 80%, 20%, %, except that the obtained mixed raw material was used as a raw material for the intermediate layer, it was manufactured in the same manner as in Example 1 to obtain a polyester film. The produced polyester film was shown in Table 3, and the transmittance at 380 nm was 1%, and it was confirmed that ultraviolet rays were absorbed.
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Abstract
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