BIAXIALLY ORIENTED POLYESTER FILM AND METHOD FOR PRODUCING THE SAME

• Main Authors: TABATA HISANORI, MORISHITA KENTA, FUNATOMI TSUYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 21.02.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

To provide a biaxially oriented polyester film that achieves both of workability and light blocking performance.SOLUTION: A biaxially oriented polyester film contains carbon black. The carbon black content is 4 wt.% or more and 13 wt.% or less relative to the total weight of the biaxially oriented polyester film. An unevenness of thickness in the film longitudinal direction is 1% or more and 10% or less.SELECTED DRAWING: None 【課題】本発明は、加工性、遮光性を両立した二軸配向ポリエステルフィルムに関する。【解決手段】カーボンブラックを含有する二軸配向ポリエステルフィルムであって、カーボンブラックの含有量が二軸配向ポリエステルフィルム全体に対して４重量％以上１３重量％以下であり、フィルム長手方向の厚みムラが１％以上１０％以下である二軸配向ポリエステルフィルム。【選択図】なし