公开(公告)号：US10286597B2

公开(公告)日：2019-05-14

申请号：US15762652

申请日：2016-10-03

Applicant: UNITIKA LTD.

Inventor： Ken Akamatsu ,  Masami Matsumoto

IPC: B32B7/12 ,  B32B15/08 ,  B32B15/09 ,  B32B27/36 ,  B32B37/12 ,  B29C48/08 ,  B29C55/12 ,  B29C55/14 ,  B29D7/01 ,  C08L67/02 ,  C08L67/03 ,  B29C48/00 ,  C08J5/18 ,  B29C47/00 ,  B29C55/00 ,  B29C71/02 ,  B29K67/00 ,  B29K509/02 ,  B29L7/00

Abstract: The present invention provides a polyester film, wherein an arbitrary direction on the film surface is defined to have an angle of 0°, and three directions are defined to have angles of 45°, 90°, and 135°, respectively, clockwise from the 0° direction, and the difference between the maximum value and the minimum value of the stresses at 5% elongation in the four directions is 50 MPa or less, the difference between the maximum value and the minimum value of the stresses at 15% elongation in the four directions is 70 MPa or less, and the modulus of elasticity in any one of the four directions falls within a range from 2.0 to 3.5 GPa.

公开(公告)号：US20240018316A1

公开(公告)日：2024-01-18

申请号：US17619613

申请日：2021-03-08

Applicant: UNITIKA LTD.

Inventor： Hiroshi Ashihara ,  Takayoshi Okuzu ,  Ken Akamatsu ,  Akiko Kurosawa ,  Goro Araki ,  Akito Kajita

IPC: C08J5/18 ,  C08G63/183 ,  B29C48/00 ,  B29C48/08

CPC classification number: C08J5/18 ,  C08G63/183 ,  B29C48/022 ,  B29C48/08 ,  B29C48/0018 ,  B29K2067/003

Abstract: A polyester film includes a polyester (A) composed mainly of polybutylene terephthalate and a polyester (B) composed mainly of polyethylene terephthalate,



wherein a mass ratio (A/B) between the polyesters (A) and (B) is 70/30 to 55/45, a dry heat shrinkage rate (B) through heat treatment at 200° C. for 15 minutes is 35% or less in any of four directions (0°, 45° 90° and 135°) on the film surface, a difference between a maximum value and a minimum value of these dry heat shrinkage rates is 5% or less, a thickness variation in the four directions is 10% or less, and a crystallization index shown in DSC measurement is 25 to 55 J/g.

公开(公告)号：US11326032B2

公开(公告)日：2022-05-10

申请号：US16954321

申请日：2018-12-26

Applicant: UNITIKA LTD.

Inventor： Takayoshi Okuzu ,  Akiko Hamamoto ,  Ken Akamatsu

IPC: B32B27/34 ,  C08J5/18 ,  B32B27/08 ,  B32B27/30

Abstract: Provided is a polyamide film which is a stretched film including a polyamide resin composition containing 1 to 10% by mass of a polyester thermoplastic elastomer, wherein the polyamide film satisfies all of the following conditions (A) to (C): (A) elastic moduli in MD and TD of the film are each 1.0 to 2.3 GPa; (B) a ratio between the elastic moduli in MD and TD of the film (MD/TD) is 0.9 to 1.5; and (C) a haze of the film is 7% or less.

公开(公告)号：US20180272594A1

公开(公告)日：2018-09-27

申请号：US15762652

申请日：2016-10-03

Applicant: UNITIKA LTD.

Inventor： Ken Akamatsu ,  Masami Matsumoto

IPC: B29C55/14 ,  B32B15/09 ,  B32B7/12 ,  B32B37/12 ,  B29C47/00 ,  B29C55/00 ,  B29C71/02

CPC classification number: B29C55/143 ,  B29C47/0004 ,  B29C47/0021 ,  B29C47/0057 ,  B29C55/005 ,  B29C55/12 ,  B29C71/02 ,  B29K2067/00 ,  B29K2509/02 ,  B29L2007/008 ,  B32B7/12 ,  B32B15/09 ,  B32B37/12 ,  B32B2307/518 ,  C08J5/18

Abstract: The present invention provides a polyester film, wherein an arbitrary direction on the film surface is defined to have an angle of 0°, and three directions are defined to have angles of 45°, 90°, and 135°, respectively, clockwise from the 0° direction, and the difference between the maximum value and the minimum value of the stresses at 5% elongation in the four directions is 50 MPa or less, the difference between the maximum value and the minimum value of the stresses at 15% elongation i,n the four directions is 70 MPa or less, and the modulus of elasticity in any one of the four directions falls within a range from 2.0 to 3.5 GPa.