公开(公告)号：US20230113079A1

公开(公告)日：2023-04-13

申请号：US17915219

申请日：2021-03-26

Applicant: UNITIKA LTD. ,  NIPPON ESTER CO., LTD. ,  UNITIKA TRADING CO., LTD.

Inventor： Goro Araki ,  Hiroshi Ashihara ,  Hazumu Nagano

IPC: C08G63/183

Abstract: To provide a biaxially stretched polyester resin film that has excellent properties equal to or better than those of biaxially stretched polyester film that does not use recycled raw material, and in particular that has an excellent flexural resistance in low-temperature environments. A biaxially stretched polyester resin film that characteristically satisfies both of the following properties (1) and (2): (1) in differential scanning calorimetry (DSC), after heating from 25° C. to 300° C. at a heating rate of 20° C./minute and holding for 10 minutes at 300° C., the temperature of crystallization during cooling at a cooling rate of 40° C./minute is 160° C. to 180° C.; and (2) the number of pinholes after the execution of 200 repetitive cycles of a flexural fatigue test in a −10° C. atmosphere using a Gelbo Flex Tester is not more than 10/500 cm2.

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：US09849653B2

公开(公告)日：2017-12-26

申请号：US14652311

申请日：2014-01-09

Applicant: UNITIKA LTD.

Inventor： Goro Araki ,  Nobuyasu Okumura ,  Yoshimi Ueno

IPC: B32B27/36 ,  B32B27/08 ,  B32B27/32 ,  B32B7/06 ,  B32B7/12 ,  B32B27/30 ,  B05D1/28 ,  B05D3/02 ,  B05D3/12 ,  C08J7/04

CPC classification number: B32B27/08 ,  B05D1/28 ,  B05D3/0272 ,  B05D3/12 ,  B32B7/06 ,  B32B7/12 ,  B32B27/306 ,  B32B27/32 ,  B32B27/36 ,  B32B2307/748 ,  B32B2405/00 ,  C08J7/047 ,  C08J2367/02 ,  C08J2423/26 ,  Y10T428/31797

Abstract: The present invention provides a mold release film including a resin layer provided on one surface of a polyester film, wherein the resin layer includes 100 parts by mass of a polypropylene-based modified polyolefin resin with the proportion of a modifying component of 1 to 10% by mass and 1 to 50 parts by mass of a cross-linking agent; the peel strength between the resin layer and a pressure-sensitive adhesive measured by bonding a rubber-based pressure-sensitive adhesive to the resin layer exceeds 3.0 N/cm; and the residual adhesion rate of a pressure-sensitive adhesive after bonding an acrylic pressure-sensitive adhesive to the resin layer is 80% or more.

公开(公告)号：US20150367610A1

公开(公告)日：2015-12-24

申请号：US14652311

申请日：2014-01-09

Applicant: UNITIKA LTD.

Inventor： Goro Araki ,  Nobuyasu Okumura ,  Yoshimi Ueno

IPC: B32B27/08 ,  B05D3/12 ,  B05D1/28 ,  B05D3/02 ,  B32B27/36 ,  B32B27/32

CPC classification number: B32B27/08 ,  B05D1/28 ,  B05D3/0272 ,  B05D3/12 ,  B32B7/06 ,  B32B7/12 ,  B32B27/306 ,  B32B27/32 ,  B32B27/36 ,  B32B2307/748 ,  B32B2405/00 ,  C08J7/047 ,  C08J2367/02 ,  C08J2423/26 ,  Y10T428/31797

Abstract: The present invention provides a mold release film including a resin layer provided on one surface of a polyester film, wherein the resin layer includes 100 parts by mass of a polypropylene-based modified polyolefin resin with the proportion of a modifying component of 1 to 10% by mass and 1 to 50 parts by mass of a cross-linking agent; the peel strength between the resin layer and a pressure-sensitive adhesive measured by bonding a rubber-based pressure-sensitive adhesive to the resin layer exceeds 3.0 N/cm; and the residual adhesion rate of a pressure-sensitive adhesive after bonding an acrylic pressure-sensitive adhesive to the resin layer is 80% or more.

Abstract translation: 本发明提供了一种脱模膜，其包括设置在聚酯膜的一个表面上的树脂层，其中，树脂层包含100质量份的改性成分的比例为1〜10质量％的聚丙烯系改性聚烯烃树脂， 和1〜50质量份的交联剂; 通过将橡胶系粘合剂与树脂层接合而测定的树脂层与压敏粘合剂之间的剥离强度超过3.0N / cm; 并且在将丙烯酸类压敏粘合剂粘合到树脂层上之后的粘合剂的残留附着率为80％以上。