Fibrous sterilizable material for packaging of medical devices and tray obtained from the material

A container for the packaging of medical devices intended to be sterilized comprising:

• a tray comprising a sterilizable fibrous material, the tray extending from a first end to a second end, and extending from a first side to a second side, the first end including a first end wall and the second end including a second end wall, and the first side including a first side wall and the second side including a second side wall, with the first and second end walls and the first and second side walls defining a recess or cavity within internal boundaries of the first and second end walls and the first and second side walls, and with a bottom wall at a bottom of the recess or cavity;
• wherein the tray has a basis weight of at least 180 g/m2, advantageously at least 200 g/m2;
• and
• wherein the tray comprises a mixture of fibers containing at least 75% by weight of natural cellulose fibers, the length of which is less than 5 mm;
• and
• wherein the tray has a permeability to air of at least 1.7, preferably at least 3.4, advantageously strictly greater than 3.4 μm/Pa·s at a pressure of 1.47 kPa, measured according to the ISO 5636-3 standard;
• and
• wherein the tray has pores having a maximum pore diameter less than 50 μm, measured according to appendix C of standard EN 868-3.

A method for fabricating a container for the packaging of medical devices intended to be sterilized comprising:

• providing a sterilizable fibrous material;
• and
• forming the sterilizable fibrous material in to a tray, the tray extending from a first end to a second end, and extending from a first side to a second side, the first end including a first end wall and the second end including a second end wall, and the first side including a first side wall and the second side including a second side wall, with the first and second end walls and the first and second side walls defining a recess or cavity within internal boundaries of the first and second end walls and the first and second side walls, and with a bottom wall at a bottom of the recess or cavity;
• wherein the tray has a basis weight of at least 180 g/m2, advantageously at least 200 g/m2;
• and
• wherein the tray comprises a mixture of fibers containing at least 75% by weight of natural cellulose fibers, the length of which is less than 5 mm;
• and
• wherein the tray has a permeability to air of at least 1.7, preferably at least 3.4, advantageously strictly greater than 3.4 μm/Pa·s at a pressure of 1.47 kPa, measured according to the ISO 5636-3 standard;
• and
• wherein the tray has pores having a maximum pore diameter less than 50 μm, measured according to appendix C of standard EN 868-3.