Receptacle with porous welding the use and the manufacture thereof

Process for the incubation of mycelium growing medium, in which

• a growing medium is placed into a bag made of one film;
• the bag is closed;
• the growing medium in the bag is sterilized;
• the bag is placed into a room containing a substantially constant atmosphere;
• the growing medium contained in the bag placed in said room is maintained at a substantially constant temperature comprised between 20.degree. and 30.degree. C.,
• the improvement consisting of the fact that a first part of the film is welded with a second part of the film with insertion of multifilament fibres, said multifilament fibres extending through the welding from an inner edge of the welding, said inner edge being directed towards the inner space defined by the bag, to an outer edge of the welding, said outer edge being directed towards the space outside of the bag, as well as partly outside the welding, so as to form channels through the welding, said channels allowing the passage of gases therethrough while avoiding the passage of solid particles, so that,
• the maximum CO.sub.2 level into the bag is kept in any place thereof at a level lower to 3%.

Process for the incubation of mycelium growing medium, in which

• a growing medium is sterilized;
• said sterilized medium is placed into a bag made of
• films welded together;
• the bag is closed;
• the bag is placed into a room containing a substantially constant atmosphere;
• the growing medium contained in the bag placed in said room is maintained at a substantially constant temperature comprised between 20.degree. and 30.degree. C.;
• the improvement consisting of the fact that a first part of a film is welded to a second part of another film with insertion of multifilament fibres, said multifilament fibres extending through the welding from an inner edge of the welding, said inner edge being directed towards the inner space defined by the bag, to an outer edge of the welding, said outer edge being directed towards the space outside of the bag, as well as partly outside the welding, so as to form channels through the welding, said channels allowing the passage of gases therethrough while avoiding the passage of solid particles, so that the maximum CO.sub.2 level into the bag is kept in any place thereof at a level lower to 3 volume %.

Process for the incubation of mycelium growing medium, in which

• a growing medium is placed into a bag made of films welded together;
• the bag is closed;
• the growing medium in the bag is sterilized;
• the bag is placed into a room containing a substantially constant atmosphere;
• the growing medium contained in the bag placed in said room is maintained at a substantially constant temperature comprised between 20.degree. and 30.degree. C.;
• the improvement consisting of the fact that a first part of a film is welded to a second part of another film with insertion of multifilament fibres, said multifilament fibres extending through the welding from an inner edge of the welding, said inner edge being directed towards the inner space defined by the bag, to an outer edge of the welding, said outer edge being directed towards the space outside the bag, as well as partly outside the welding, so as to form channels through the welding, said channels allowing the passage of gases therethrough while avoiding the passage of solid particles, so that the maximum CO.sub.2 level into the bag is kept in any place thereof at a level lower to 3 volume %.