Toyo Seikan Kaisha, Ltd.

Setsuko Iida

Yoshitsugu Maruhashi

Hiroshi Koyama

Kazuhisa Ishibashi

Koji Sato

Nobuyuki Takakusaki

Nobuhiro Kishida

Yohji Mizutani

Ikuo Sugiyama

Takashi Sugisaki

Hideo Kurashima

Sadao Hirata

Kenji Matsuno

Kimio Takeuchi

Nobuyuki Kato

Hiroo Ikegami

Tamio Asai

A process for producing biaxially drawn plastic bottles having excellent heat resistance and an apparatus therefor. The process comprises a step of biaxially drawing and free blow-molding the preformed article to obtain a secondary molded article thereof, a step of heating the secondary molded article by inserting it for 0.3 to 5 seconds in the infrared rays emitted from an infrared-ray radiation member that has a substantially planar radiation surface having a height larger than that of the secondary molded article in the direction of height and having a surface temperature of from 350.degree. C. to 1000.degree. C., in order to obtain a tertiary product thereof that is shrunk, and a step for blow-molding the tertiary product that is in a heated state in a metal mold to obtain a final molded article. A single metal mold is used for blow-molding to shorten the time occupied by the metal mold and to produce the bottles having excellent heat resistance maintaining high productivity.

Process for producing biaxially drawn plastic bottles having excellent

In preparing a draw-blow-formed polyester vessel, the inner surface and outer surface temperatures of a starting preform are adjusted at specific levels at the preliminary heating step, and the drawing speed in the circumferential direction is adjusted at a level of at least 350%/sec and a specific relation is established between the area draw ratios on the inner and outer surface sides at the draw-blowing step. A polyester vessel having a reduced shrinkage with time and a high pressure-resistant strength is obtained according to this process.

Polyester vessel for drink and process for preparation thereof

This invention relates to a heating method for forming a thermoplastic bottle in which a heating member is inserted into the interior from a preform made of a thermoplastic material or the bottle and the preform or plastic bottle is heated by the heating member and a heating device located externally so as to thereby heat the same simultaneously internally and externally thereof, the temperature of the respective heating member being controlled respectively. Radiant heat energy distribution is variable along the longitudinal direction of the heating member so as to carry out the heating process in conformity with the bottle to be formed so as to manufacture the plastic bottle with high quality. A metal to be melted within a predetermined temperature range is enclosed in the heating member and the predetermined temperature of the heating member is maintained for a long period of time by the utilization of the latent heat of the metal so as to manufacture the plastic bottle with high quality under precise temperature setting conditions. The heating means is also utilized for the heating of a mouth portion of the plastic bottle so as to obtain a suitable crystallization of the mouth portion.

Method of heating thermoplastic bottle or preform and method of

Method of heating thermoplastic bottle of preform and method of

An improvement in a packaging multilayer plastic container comprising a gas-barrier interlayer of an ethylene/vinyl alcohol copolymer and an inner and an outer layer of a moisture-resistant thermoplastic resin such as a polyester sandwiching the interlayer. An intermediary layer comprising particles of a high water-absorbing resin dispersed in a resinous medium is provided between the gas-barrier layer and each of the inner and outer layers. Crosslinked polyacrylic acid or its salt or a vinyl alcohol/acrylic acid (salt) block copolymer, for example, may be used as the highly water-absorbing resin. Because of its high saturation moisture absorption at high temperatures, the highly water-absorbing resin is effective for preventing degradation of the gas-barrier property of the ethylene/vinyl alcohol copolymer during retorting.

Multilayer plastic container

Disclosed is a process for the preparation of a heat-resistant polyester hollow formed body, which comprises mounting a preform of a thermoplastic polyester composed mainly of ethylene terephthalate units, which is maintained at a temperature where high-speed drawing is possible but whitening can be prevented, especially at a temperature represented by the following formula:

Process for blow-molding and heat setting of polyester hollow formed body

A process for the preparation of a heat-resistant polyester hollow formed body, which comprises mounting a preform of a thermoplastic polyester composed mainly of ethylene terephthalate units, which is maintained at a temperature where high-speed drawing is possible but whitening can be prevented, especially at a temperature represented by the following formula:

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Yokohama, Japan

Setsuko Iida