WO2023037309 - SEALABLE PEELABLE POLYESTER FILMS
National phase entry:
Publication Number
WO/2023/037309
Publication Date
16.03.2023
International Application No.
PCT/IB2022/058514
International Filing Date
09.09.2022
Title **
[English]
SEALABLE PEELABLE POLYESTER FILMS
[French]
FILMS DE POLYESTER PELABLES ET SCELLABLES
Applicants **
DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
974 Centre Road
Wilmington
Delaware, 19805, US
Inventors
LIU, Shengsheng
c/o DuPont Teijin Films, 3600 Discovery Drive
Chester, Virginia 23836, US
PANTELIC, Nebojsa
c/o DuPont Teijin Films, 3600 Discovery Drive
Chester, Virginia 23836, US
Priority Data
2112836.8
09.09.2021
GB
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
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International Searching Authority |
EPO
* |
| Applicant's Legal Status |
Legal Entity
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| * | |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter I
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing | 1688 | |
| EPO | Filing, Examination | 11622 | |
| Japan | Filing | 589 | |
| South Korea | Filing | 575 | |
| USA | Filing, Examination | 6910 |
Total: 21384 USD
The term for entry into the National Phase has expired. This quotation is for informational purposes only
Abstract[English]
A polymeric film comprising a polyester substrate layer and a heat-sealable polymeric layer disposed on one surface of said polyester substrate layer, wherein the heat-sealable polymeric layer comprises copolyester A having a glass transition temperature Tg(A) in an amount WA and copolyester B having a glass transition temperature Tg(B) in an amount WB, wherein: (i) WA > WB; (ii) WA is at least 50 wt% by total weight of the heat-sealable polymeric layer; (iii) WB is at least 10 wt% by total weight of the heat-sealable polymeric layer; (iv) Tg(A) > Tg(B); (v) Tg(B) is in the range of -35°C to -10°C; and (vi) Tg(A) is preferably in the range of -15°C to 5°C.[French]
La présente invention concerne un film polymère comprenant une couche de substrat de polyester et une couche polymère thermoscellable disposée sur une surface de ladite couche de substrat de polyester, la couche polymère thermoscellable comprenant un copolyester A présentant une température de transition vitreuse Tg(A) en une quantité WA et un copolyester B présentant une température de transition vitreuse Tg(B) en une quantité WB, avec : (i) WA > WB ; (ii) WA représentant au moins 50 % en poids du poids total de la couche polymère thermoscellable ; (iii) WB représentant au moins 10 % en poids du poids total de la couche polymère thermoscellable ; (iv) Tg(A) > Tg(B) ; (v) Tg(B) se situant dans la plage de -35 °C à -10 °C ; et (vi) Tg(A) se situant de préférence dans la plage de -15 °C à 5 °C.