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1. WO2020137790 - BIAXIALLY ORIENTED POLYPROPYLENE FILM

Publication Number WO/2020/137790
Publication Date 02.07.2020
International Application No. PCT/JP2019/049807
International Filing Date 19.12.2019
IPC
B29C 55/12 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
10multiaxial
12biaxial
B29K 23/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D103
23Use of polyalkenes as moulding material
B29L 7/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C59
7Flat articles, e.g. films or sheets
C08J 5/18 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
CPC
B29C 55/12
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
10multiaxial
12biaxial
C08J 5/18
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
Applicants
  • 東洋紡株式会社 TOYOBO CO., LTD. [JP]/[JP]
Inventors
  • 山田 浩司 YAMADA, Kouji
  • 堀之内 一仁 HORINOUCHI, Kazuhito
  • 中野 麻洋 NAKANO, Mahiro
  • 今井 徹 IMAI, Toru
Agents
  • 特許業務法人アスフィ国際特許事務所 USFI PATENT ATTORNEYS INTERNATIONAL OFFICE
Priority Data
2018-24798328.12.2018JP
2019-19547028.10.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) BIAXIALLY ORIENTED POLYPROPYLENE FILM
(FR) FILM DE POLYPROPYLÈNE À ORIENTATION BIAXIALE
(JA) 二軸配向ポリプロピレンフィルム
Abstract
(EN)
The present invention provides a biaxially oriented polypropylene film that has excellent heat resistance even at the high temperature of 150°C and high rigidity, easily maintains a bag shape when used as a packaging bag, and also exhibits little pitch displacement during printing and few wrinkles at a sealing portion when heat-sealed. The storage modulus (E’-23) of this biaxially oriented polypropylene film at 23°C in a dynamic viscoelastic measurement is 2.0 GPa or more in the length direction and 6.0 GPa or more in the width direction, and the storage modulus (E’-80) at 80°C in a dynamic viscoelastic measurement is 1.0 GPa or more in the length direction and 3.0 GPa or more in the width direction. The ratio of E’-80 to E’-23 (E’-80/E’-23) is 0.4 or more in both the length direction and the width direction. The thermal shrinkage rate at 150°C is 10% or less in the length direction and 30% or less in the width direction, and the thermal shrinkage rate at 120°C is 2.0% or less in the length direction and 5.0% or less in the width direction. The thermal shrinkage rate at 120°C in the length direction is smaller than the thermal shrinkage rate at 120°C in the width direction.
(FR)
L'invention fournit un film de polypropylène à orientation biaxiale qui présente une rigidité élevée, qui est doté d'une excellente résistance à la chaleur à des températures élevées de 150°C, qui conserve facilement une forme de sac lorsqu'il consiste en un sac d'emballage, et qui présente peu de décalage de pas lors d'une impression et peu de plis de partie scellement après soudage à chaud. Plus précisément, l'invention concerne un film de polypropylène à orientation biaxiale dans lequel le module d'élasticité de conservation (E'-23) à 23°C selon une mesure de viscoélasticité dynamique est supérieur ou égal à 2,0GPa dans la direction longitudinale et supérieur ou égal à 6,0GPa dans la direction de la largeur, le module d'élasticité de conservation (E'(E'-80)) à 80°C selon une mesure de viscoélasticité dynamique est supérieur ou égal à 1,0GPa dans la direction longitudinale et supérieur ou égal à 3,0GPa dans la direction de la largeur, le rapport (E'-80/E'-23) entre E'-80 et E'-23 est supérieur ou égal à 0,4 à la fois dans la direction longitudinale et dans la direction de la largeur, le retrait thermique à 150°C est inférieur ou égal à 10% dans la direction longitudinale et inférieur ou égal à 30% dans la direction de la largeur, le retrait thermique à 120°C est inférieur ou égal à 2,0% dans la direction longitudinale et inférieur ou égal à 5,0% dans la direction de la largeur, et le retrait thermique à 120°C dans la direction longitudinale est plus faible que le retrait thermique à 120°C dans la direction de la largeur.
(JA)
剛性が高く、150℃もの高温での耐熱性にも優れ、包装袋としたときの袋形状を保持しやすく、しかも印刷時のピッチずれやヒートシールしたときにシール部のシワが少ない二軸配向ポリプロピレンフィルムを提供すること。 動的粘弾性測定における23℃の貯蔵弾性率(E'-23)が長手方向で2.0GPa以上であり、幅方向で6.0GPa以上であり、動的粘弾性測定における80℃の貯蔵弾性率E'(E'-80)が長手方向で1.0GPa以上であり、幅方向で3.0GPa以上であり、E'-80とE'-23の比(E'-80/E'-23)が長手方向、幅方向ともに0.4以上であり、かつ、150℃における熱収縮率が長手方向で10%以下であり、幅方向で30%以下であり、さらに120℃の熱収縮率が長手方向で2.0%以下であり、幅方向で5.0%以下であり、かつ長手方向の120℃熱収縮率が幅方向の120℃熱収縮率よりも小さい二軸配向ポリプロピレンフィルム。
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