公开(公告)号：US20230257533A1

公开(公告)日：2023-08-17

申请号：US18003752

申请日：2021-07-01

Applicant: TOYOBO CO., LTD.

Inventor： Shintaro ISHIMARU ,  Masayuki HARUTA

IPC: C08J5/18 ,  B29C61/02 ,  B29C61/00 ,  B29C55/08

CPC classification number: C08J5/18 ,  B29C61/02 ,  B29C61/003 ,  B29C55/08 ,  C08J2367/02 ,  B29K2067/003

Abstract: [PROBLEMS] It is an object of the present invention to provide a heat-shrinkable polyester-based film roll which can reduce defects caused during a heat shrinking step due to the variation of a heat shrinkage rate in the heat-shrinkable polyester-based film roll having the longitudinal direction as the main shrinkage direction, specifically, defects of the film when covering an object by a wrap-around method and heat-shrunk. [SOLUTIONS] A heat-shrinkable polyester-based film roll, comprising a core; and a heat-shrinkable polyester-based film having a longitudinal direction as a main shrinkage direction that is wound around the core; wherein the film (roll) satisfy predetermined polyester composition, and all samples cutout every about 100 m have a heat shrinkage rate measured by immersion in hot water of 90° C. for 10 seconds of 30% or more and 80% or less and ±3% or less of an average in the longitudinal direction.

公开(公告)号：US20230038115A1

公开(公告)日：2023-02-09

申请号：US17786799

申请日：2020-12-14

Applicant: TOYOBO CO., LTD.

Inventor： Shintaro ISHIMARU ,  Masayuki HARUTA

IPC: B32B27/32 ,  B32B27/20 ,  B32B38/00 ,  B32B7/023 ,  B32B7/028 ,  B41M5/26 ,  B65D65/40

Abstract: A polyolefin-based film comprising at least one layer permitting printing as a result of laser irradiation; wherein not less than 100 ppm but not greater than 3000 ppm of pigment permitting printing as a result of laser irradiation is present in all layers of the film; haze thereof is not less than 1% but not greater than 30%; and unevenness in thickness thereof in either a machine direction or a transverse direction is not less than 0.1% but not greater than 25%. An object is to provide a film capable of being printed in distinct fashion by a laser, that excels with respect to unevenness in thickness, and that is of high transparency, and at the same time provide packaging which employs such film and on which printing has been directly carried out.

公开(公告)号：US20210229410A1

公开(公告)日：2021-07-29

申请号：US15734978

申请日：2019-06-04

Applicant: TOYOBO CO., LTD.

Inventor： Shintaro ISHIMARU ,  Hiroko MARUYAMA ,  Tomoyuki HASHIDA ,  Masayuki HARUTA

IPC: B32B27/36 ,  B32B27/08 ,  C08J5/18 ,  B65D65/40 ,  B65D81/24 ,  B65D77/20

Abstract: The present invention provides a polyester-based film for keeping freshness, comprising a polyester-based resin layer comprising ethylene terephthalate as a main component, wherein the polyester-based film satisfies the requirements (1) to (4); that can extend the shelf life of the contents such as fruits and vegetables when using as a packaging bag, increase a commodity value, and re-close even after the packaging bag opened. (1) the film has an O2-transmission rate of 50 [cc/(m2·d·atm)] or more and 1000 [cc/(m2·d·atm)] or less when measured at a temperature of 23° C. and a relative humidity of 65% RH, (2) the film has a CO2-transmission rate of 200 [cc/(m2·d·atm)] or more and 5000 [cc/(m2·d·atm)] or less when measured at a temperature of 23° C., (3) the film has a water vapor transmission rate of 20 [g/(m2·d)] or more and 400 [g/(m2·d)] or less when measured at a temperature of 40° C. and a relative humidity of 90% RH, and (4) the film has an angle after folding the film of 20° or more and 80° or less.

公开(公告)号：US20190315107A1

公开(公告)日：2019-10-17

申请号：US16313746

申请日：2017-06-20

Applicant: TOYOBO CO., LTD.

Inventor： Shintaro ISHIMARU ,  Masayuki HARUTA

IPC: B32B27/36 ,  B65D65/40

Abstract: The polyester film is formed with a polyester resin whose main constituent component is ethylene terephthalate. The polyester film has two or more layers that include at least one fold holding layer, which is present on at least one of the film surfaces and has a total of at least one monomer component that can form an amorphous component of 12-30% by mol in all monomer components of the fold holding layer and a difference in amount of an amorphous component of 4-30% by mol obtained by deducting an amount of an amorphous component in a layer other than the fold holding layer from the amount of the amorphous component in the fold holding layer. The polyester film has a fold holding angle of 20-70 degrees and a heat shrinkage rate of 0-15% in the longitudinal and width directions when treated in 80° C. hot water for 10 seconds.