POLYVINYL ALCOHOL-BASED FILM AND POLARIZING FILM

• Main Author: KANI Shouichi
• Format: Patent
• Language: English; French; Japanese
• Published: 06.02.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

In order to obtain a polyvinyl alcohol-based film having high transparency and excellent antistatic performance, the present invention provides a polyvinyl alcohol-based film containing: a polyvinyl alcohol-based resin (A); and an ester (B) of a fatty acid (b1) having 2-4 carbon atoms and a polyhydric alcohol. The polyvinyl alcohol-based film is characterized in that the content of the abovementioned ester (B) is 1-4000 ppm. L'invention concerne un film d'alcool polyvinylique d'une grande transparence et présentant des propriétés antistatiques excellentes. Plus précisément, ce film d'alcool polyvinylique contient: (A) une résine d'alcool polyvinylique et (B) un ester d'acide gras (b1) C2-4 et de polyalcool, ce film d'alcool polyvinylique étant caractérisé en ce que la teneur en ester (B) est comprise entre 1 et 4000ppm. 透明性が高く、帯電防止性能にも優れるポリビニルアルコール系フィルムを得るため、ポリビニルアルコール系樹脂（Ａ）、及び炭素数２～４の脂肪酸（ｂ１）と多価アルコールとのエステル（Ｂ）を含有するポリビニルアルコール系フィルムであって、上記エステル（Ｂ）の含有量が１～４０００ｐｐｍであることを特徴とするポリビニルアルコール系フィルムを提供する。