MANUFACTURING METHOD OF FILM

• Main Author: OBARA ATSUNORI
• Format: Patent
• Language: English; Japanese
• Published: 03.12.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR RELEVANT APPARATUS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a manufacturing method of a film, the method capable of suppressing precipitation of an oligomer, reducing occurrence of a defect due to adhesion of an oligomer, and suppressing occurrence of uneven thickness in a longitudinal direction of the film.SOLUTION: There is provided a manufacturing method of a film, the method comprising a step in which, when a gas circulation path having both a platinum catalyst and a heating mechanism inside is defined as a gas circulation path A, and a chamber having the gas circulation path A is defined as a chamber B, a sheet is stretched at least in one direction by a tenter apparatus having at least one of the chamber B. In the manufacturing method of the film, the inside of the gas circulation path A is provided with the platinum catalyst satisfying all of the following conditions (i) to (iii): (i) a base material has a honeycomb structure; (ii) an average pore area of the honeycomb structure described in (i) is 0.5 mm2 or more and 3.0 mm2 or less; and (iii) a filling specific gravity is 0.3 g/cm3 or more and 0.7 g/cm3 or less.SELECTED DRAWING: Figure 1 【課題】 本発明は、オリゴマの析出を抑制し、オリゴマの付着による欠点の発生を軽減すると共に、フィルムの長手方向の厚みムラを抑制することができるフィルムの製造方法を提供することをその課題とする。【解決手段】 内部に白金触媒と加熱機構とを備える気体循環経路を気体循環経路Ａ、前記気体循環経路Ａを備える部屋を部屋Ｂとしたときに、前記部屋Ｂを少なくとも一つ備えるテンター装置で少なくとも一方向にシートを延伸する工程を有するフィルムの製造方法であって、前記気体循環経路Ａの内部に以下条件（ｉ）〜（ｉｉｉ）を全て満たす白金触媒を備えることを特徴とする、フィルムの製造方法。（ｉ） 基材がハニカム構造を有すること。（ｉｉ） （ｉ）に記載のハニカム構造の細孔平均面積が０．５ｍｍ２以上３．０ｍｍ２以下であること。（ｉｉｉ） 充填比重が０．３ｇ／ｃｍ３以上０．７ｇ／ｃｍ３以下であること。【選択図】図１