HEAT SHRINKABLE FILM AND MANUFACTURING METHOD THEREOF
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United States of America Patent
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Issued Date -
Oct 3, 2024
app pub date -
Aug 3, 2022
filing date -
Aug 5, 2021
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Abstract
A manufacturing method for a heat shrinkable film includes: preparing a packaging material that includes film labels having a resin layer mainly contains thermoplastic resin, and a printed layer; recovering first and second recycled raw materials from the resin layer; and forming a resin film with a core layer including the recycled raw materials and a surface layer layered onto the core layer and includes thermoplastic resin. Recovering the recycled raw materials includes: forming, into individual pieces, the packaging material and/or the resin layer from which the printed layer has been removed; and separating the printed layer from the packaging material and/or pieces of the packaging material to obtain the resin layer from which the printed layer has been removed and/or pieces of the resin layer from which the printed layer has been removed. One of the recycled raw materials is polyester-based resin, and the other is polystyrene-based resin.
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