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1. WO2020090628 - POLYPROPYLENE FILM AND MOLD RELEASE FILM

Publication Number WO/2020/090628
Publication Date 07.05.2020
International Application No. PCT/JP2019/041764
International Filing Date 24.10.2019
IPC
C08J 5/18 2006.01
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
B29C 55/14 2006.01
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
14successively
B32B 27/32 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
32comprising polyolefins
Applicants
  • 東レ株式会社 TORAY INDUSTRIES, INC. [JP]/[JP]
Inventors
  • 今西 康之 IMANISHI, Yasuyuki
  • 岡田 一馬 OKADA, Kazuma
  • 大倉 正寿 OHKURA, Masatoshi
  • 山中 康平 YAMANAKA, Kohei
Agents
  • 特許業務法人酒井国際特許事務所 SAKAI INTERNATIONAL PATENT OFFICE
Priority Data
2018-20635601.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) POLYPROPYLENE FILM AND MOLD RELEASE FILM
(FR) FILM DE POLYPROPYLÈNE ET FILM DE DÉMOULAGE
(JA) ポリプロピレンフィルム、および離型フィルム
Abstract
(EN)
The present invention provides a polypropylene film which has improved surface flexibility, while exhibiting excellent surface smoothness, transparency and mold releasability, and which is suitable for use as a mold release film. A polypropylene film according to the present invention has an elastic modulus of 2.5 GPa or less as determined by measuring at least one surface thereof by a nanoindentation method; and the crystallization peak temperature (Tc) of this polypropylene film is 110°C or more as measured by a differential scanning calorimeter DSC, while being heated at a heating rate of 20°C/min from 25°C to 250°C and subsequently cooled at a cooling rate of 20°C/min from 250°C to 25°C.
(FR)
L'invention concerne un film de polypropylène présentant une flexibilité de surface améliorée, tout en présentant d'excellentes douceur de surface, transparence et aptitude au démoulage, et qui est approprié pour être utilisé en tant que film de démoulage. Le film de polypropylène selon l'invention est doté d'un module d'élasticité de 2,5 GPa ou inférieur, tel que déterminé par la mesure d'au moins une surface de celui-ci par un procédé de nanopénétration ; et la température de pic de cristallisation (Tc) de ce film de polypropylène est de 110°C ou supérieure, telle que mesurée par un calorimètre à balayage différentiel (DSC), tout en étant chauffé à une vitesse de chauffage de 20°C/min, de 25°C à 250°C, puis refroidi à une vitesse de refroidissement de 20°C/min, de 250°C à 25°C.
(JA)
表面柔軟性を改善し、かつ表面平滑性、透明性、離型性に優れ、離型フィルムとして好適に使用することができるポリプロピレンフィルムを提供する。本発明のポリプロピレンフィルムは、少なくとも一方の表面をナノインデンテーション法で測定した弾性率が2.5GPa以下であり、示差走査熱量計DSCで25℃から250℃まで20℃/minで昇温し、ついで250℃から25℃まで20℃/minで降温したときの、結晶化ピーク温度(Tc)が110℃以上である。
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