HEAT RESISTANT CONTAINER AND MANUFACTURE THEREOF

PURPOSE:To improve heat resistance, dissolve the restriction of temperature criteria for heat sterilization, etc., and obtain a heat resistant container with a high generality, by arranging a thermocrystallized part, which has been locally thermocrystallized, on the bottom surface container, drawing all the remaining region excepting the above- mentioned thermocrystallized part with a high drawing magnification, and giving a double cure treatment by the thermocrystallization. CONSTITUTION:A parison 10' is manufactured by an injection forming; a mouth 1D' and a bottom wall 10B' of the parison 10' are thermocrystallized by a heat treatment; thermocrystallized regions G1, G2 are formed to make a parison 10; and a container 1 is formed by blowing. By heaters 14, 14, a mold 11 is heated; the parison 10 is drawn in the axial direction by extending a drawing rod 12. Compressed air is blown into the parison 10 through a fluid path 13 of the drawing rod 12; a cylindrical part 10A of the parison 10 swells and contacts the inner surface of the mold 11; a bottom wall 10B contacts the inner surface of a bottom mold 11B. An amorphous part on the parison 10 excepting the thermocrystallized regions G1, G2, the cylindrical part 10A are heat drawn to generate a sufficient crystal orientation; a drum part 1A and a shoulder part 1C of the container 1, and a high drawn part 5 excepting the crystallized part on a bottom 1B are constituted.