Blow molding method, composite preform, composite container, inner label member, and plastic member

A blow molding method for molding a composite container, comprising:

• preparing a preform which is made of plastic material;
• arranging a plastic member having heat shrinkability outside the preform;
• setting the plastic member in close contact with an outer surface of the preform by heating the plastic member, by a first heating device, to cause it to heat-shrink and make a composite preform;
• heating the preform and the plastic member, by a second heating device, and inserting the preform and the plastic member in a blow molding die;
• and
• integrally inflating the preform and the plastic member by performing blow molding on the preform and the plastic member in the blow molding die;
• carrying out a first series of processes for making the composite preform in a first factory, the first series of processes including:
• preparing the preform,
• arranging the plastic member, and
• setting the plastic member in close contact with an outer surface of the preform by heating the plastic member by a first heating device;
• transporting the composite preform to a second factory;
• and
• carrying out a second series of processes for making the composite container by means of blow molding in the second factory, the second series of processes including:
• heating the preform and the plastic member by a second heating device, and
• integrally inflating the preform and the plastic member.