LIQUID CRYSTALLINE RESIN PELLET AND MELT EXTRUDED FILM COMPRISING SAME

• Main Authors: AOSHIMA Hironobu, KAWAHARA Toshinori, NAKANE Toshio
• Format: Patent
• Language: English; French; Japanese
• Published: 30.06.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Provided is a liquid crystalline resin pellet for a melt extruded film, which contains a large amount of a constituent unit derived from 6-hydroxy-2-naphthoic acid, and which can yield a melt extruded film in which the occurrence of foreign bodies and thickness variations in the machine direction (MD) are reduced.　This liquid crystalline resin pellet for a melt extruded film contains a liquid crystalline resin (A). The liquid crystalline resin (A) contains a constituent unit (I) with the content thereof being 40-85 mol% relative to all constituent units. The liquid crystalline resin has a melting enthalpy ΔH, as measured by DSC, of 0.0-4.5 J/g. L'invention concerne une pastille de résine cristalline liquide pour un film extrudé à l'état fondu, qui contient une grande quantité d'une unité constitutive dérivée de l'acide 6-hydroxy-2-naphtoïque, et qui peut produire un film extrudé à l'état fondu dans lequel l'apparition de corps étrangers et des variations d'épaisseur dans le sens machine (MD) sont réduites.　Cette pastille de résine cristalline liquide pour un film extrudé à l'état fondu contient une résine cristalline liquide (A). La résine cristalline liquide (A) contient une unité constitutive (I) dont la teneur est de 40 à 85 % en moles par rapport à toutes les unités constitutives. La résine cristalline liquide a une enthalpie de fusion ΔH, telle que mesurée par DSC, de 0,0 à 4,5 J/g. ６－ヒドロキシ－２－ナフトエ酸に由来する構成単位を多く含みつつも、ブツの発生及びＭＤ方向における厚み変動が低減された溶融押出フィルムを与えることができる溶融押出フィルム用液晶性樹脂ペレットを提供する。　本発明に係る溶融押出フィルム用液晶性樹脂ペレットは、（Ａ）液晶性樹脂を含有し、前記（Ａ）液晶性樹脂は、下記構成単位（Ｉ）を含み、全構成単位に対し、構成単位（Ｉ）の含有量が４０～８５モル％であり、ＤＳＣにより測定した融解エンタルピーΔＨが０．０～４．５Ｊ／ｇである。