SEALANT FILM, MULTILAYER FILM INCLUDING SAME, PACKAGING BAG AND PACKAGING CONTAINER, AND METHOD FOR PRODUCING SEALANT FILM
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United States of America Patent
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Issued Date -
Jul 11, 2024
app pub date -
Mar 27, 2024
filing date -
Sep 29, 2021
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A sealant film including a polyester layer containing polyester as a main ingredient, in which the polyester is made of a structural unit derived from ethylene glycol, a structural unit derived from terephthalic acid and a structural unit derived from isophthalic acid, a ratio of the structural unit derived from isophthalic acid is 3.0 mol % or more and 15 mol % or less relative to ratios of the structural unit derived from terephthalic acid and the structural unit derived from isophthalic acid constituting the polyester, and a content rate of an oligomer contained in polyester layer is less than 2.0% by mass.
First Claim
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International Classification(s)
- C09J:ADHESIVES; ADHESIVE PROCESSES IN GENERAL
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
- B65D:CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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