公开(公告)号：US20210339514A1

公开(公告)日：2021-11-04

申请号：US17279577

申请日：2019-09-30

Applicant: TOYOBO CO., LTD.

Inventor： Hiroko MARUYAMA ,  Masayuki HARUTA ,  Shintaro ISHIMARU

IPC: B32B27/36 ,  B65D65/40 ,  B65D30/08

Abstract: The invention provides a sealant film that is less likely to adsorb components formed of various types of organic compounds, has excellent heat sealing characteristics at 140° C., while having low heat sealing strength at 100° C. and being less likely for heat sealing layers to adhere to each other even when the film is used as a packaging bag and the content thereof is warmed in boiling water. The sealant film has at least one heat sealing layer consisting of a polyester component, wherein a heat sealing strength of the heat sealing layer being heat sealed to another heat sealing layer at 100° C. and 0.2 MPa for 2 seconds is 0-5 N/15 mm and at 140° C. and 0.2 MPa for 2 seconds is 8-30 N/15 mm, and a film density including all layers is 1.20 or more and less than 1.39.

公开(公告)号：US20200074888A1

公开(公告)日：2020-03-05

申请号：US16466576

申请日：2017-12-11

Applicant: TOYOBO CO., LTD.

Inventor： Hiroko MARUYAMA ,  Masayuki HARUTA

IPC: G09F3/04 ,  B65D23/08 ,  B29C65/00 ,  G09F3/00 ,  C09J11/06 ,  C09J167/00

Abstract: Provided are a heat-shrinkable polyester-based label, and a package which each have a solvent-bonded portion where no solvent permeation-through is caused even when a film of the label is small in thickness. Provided are, in particular, a heat-shrinkable polyester-based label and a package which each have a solvent-bonded portion giving a high peel strength stably even through a high-speed tubing step, or even when the film is a heat-shrinkable polyester-based film in which a PET-bottle-recycled material is used in a large proportion. The label is a heat-shrinkable polyester-based label that is a tubular label in which both end portions of a heat-shrinkable polyester-based film are bonded to each other with a solvent composition. In this label, the solvent composition is a solvent composition containing at least 1,3-dioxolane and/or tetrahydrofuran (THF), and a polyester, and the end portion bonded has a peel strength of 2 N/15 mm or more.

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.