HEAT SEAL SHEET AND STERILIZED PACKAGE

WIPO Patent Application WO/2024/075655

A1

The purpose of the present invention is to provide: an excellent heat seal sheet that has sufficient heat adhesiveness and air permeability throughout the whole heat seal surface thereof, and that has a high strength and a reduced amount of lint generated therefrom; a production method for the heat seal sheet; and a sterilized package using the heat seal sheet.　The heat seal sheet according to the present invention comprises: one or more thermoplastic resin fiber nonwoven fabric layers A; and one or more thermoplastic resin fiber nonwoven fabric layers B. The thermoplastic resin fiber nonwoven fabric layers B each contain a low-melting-point polyester resin, polyester fibers, and a polyethylene resin. The mass ratio of the low-melting-point polyester resin, the polyester fibers, and the polyethylene resin (low-melting-point polyester resin : polyester fibers : polyethylene resin) is 13.75:11.25:75 to 41.25:33.75:25. The Oken-type air permeability of the heat seal sheet as measured in accordance with JIS P 8117:2009 is at most 700 seconds, and the tear strength of the heat seal sheet as measured in accordance with JIS P 8116:2000 is at least 700 mN.

MANDO RITSUO (JP)
KOGUCHI YUKIKO (JP)
KAWAKITA MASAHIRO (JP)
NAGOYA MISA (JP)
YANAGISAWA KENJI (JP)

PCT/JP2023/035722

April 11, 2024

September 29, 2023

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OJI HOLDINGS CORP (JP)

B32B5/26; A61B50/00; B32B27/32; B32B27/36; B65D65/40; A61L2/04; A61L2/08; A61L2/20; B65B55/08

WO2019107025A1

2019-06-06

JP2022068392A	2022-05-10
JPH0483634A	1992-03-17
JP2019183293A	2019-10-24
JP2019206351A	2019-12-05
JP2017002439A	2017-01-05

OHTANI PATENT OFFICE (JP)

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