Toyo Boseki Kabushiki Kaisha

Mitsubishi Jukogyo Kabushiki Kaisha

Tatsuo Shimura

Hideyuki Mitamura

Fumikazu Yoshida

Naokazu Takeuchi

Yoshihisa Hama

Tatsu Akashi

Sukeyoshi Wakamiya

Electrically conductive conjugate fibers having a diameter less than 50 fm. The fibers include a thermoplastic sheath and a low-melting metal core, with the core occupying 0.2 to 50% of the sectional area of the fiber. The sectional area of the core varies by less than 25% in the longitudinal direction, and the total length of the discontinuous portions of the core is 5 cm or less per meter. The fibers can be produced with a conjugate spinning nozzle. The low-melting metal is provided to the nozzle from a closed fusion tank located at a position below the spinning nozzle. The metal is supplied to the spinning nozzle by means of pressure from inert gas, which is supplied to an upper space of the fusion tank. The level of metal in the fusion tank is maintained substantially constant, and the pressure of the gas is controlled so as to maintain a pressure variation of 0.1 kg/cm.sup.2 or less.

Method of making electrically conductive fibers

Electrically conductive conjugate fibers having a diameter less than 50.mu.m. The fibers include a thermoplastic sheath and a low-melting metal core, with the core occupying 0.2 to 50% of the sectional area of the fiber. The sectional area of the core varies by less than 25% in the longitudinal direction, and the total length of the discontinuous portions of the core is 5 cm or less per meter. The fibers can be produced with a conjugate spinning nozzle. The low-melting metal is provided to the nozzle from the closed fusion tank located at a position below the spinning nozzle. The metal is supplied to the spinning nozzle by means of pressure from inert gas, which is supplied to an upper space of the fusion tank. The level of metal in the fusion tank is maintained substantially constant, and the pressure of the gas is controlled so as to maintain a pressure variation of 0.1 kg/cm.sup.2 or less.

Electrically conductive fibers, apparatus and method for the production

A process and apparatus for pneumatic-pressure forming or vacuum/pneumatic-pressure forming a web of thermoplastic material into a matrix form of containers and having the thus-formed plastic product processed with a thermal fixation operation, which comprises in combination the steps of holding a forming mold at a thermal fixing temperature for the plastic to be formed so as to have the matrix of containers thermally fixed through a temperature range characteristic of the plastic; and cooling-off thus-formed plastic containers, while maintaining the interior of the formed plastic containers at such a pressure level that the formed plastic containers are no longer subjected to any risk of deformation after the forming mold is removed, and after having been removed from the engagement with the forming mold.

Apparatus for thermally fixing the formed thermoplastic products

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Takashima, Japan

Tatsuo Shimura