(19)
(11) EP 1 779 994 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 158(3) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
10.10.2007 Bulletin 2007/41

(43) Date of publication:
02.05.2007 Bulletin 2007/18

(21) Application number: 05780154.0

(22) Date of filing: 27.07.2005
(51) International Patent Classification (IPC): 
B29C 49/64(2006.01)
 B29K 67/00(2006.01)
(86) International application number:
PCT/JP2005/013723
(87) International publication number:
WO 2006/011507 (02.02.2006 Gazette 2006/05)
(84) Designated Contracting States:
DE FR

(30) Priority: 29.07.2004 JP 2004222134

(71) Applicant: Mitsui Chemicals, Inc.
Tokyo 105-7117 (JP)

(72) Inventors:
  • KUROSAKI, Yasuo
    Kanagawa;2230061 (JP)
  • HAMA, Takashi
    Sodegaura-shi, Chiba;2990265 (JP)

(74) Representative: HOFFMANN EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) METHOD OF PRODUCING THERMOPLASTIC RESIN HOLLOW MOLDED PRODUCT


(57) A process for producing a hollow blow-molded product with high productivity is provided by improving heating efficiency of a parison without significant changes to a molding machine for producing the product.
The invention relates to the following production process. A process for producing a resin hollow molded product, which comprises the step of heating a parison formed of a thermoplastic resin material, and the step of blow-molding the heated parison, the heating step involving a near-infrared heater with a maximum energy wavelength in the range of 900 nm to 1500 nm and a wavelength converter disposed outside the parison, which absorbs the radiation from the near-infrared heater and emits the radiation as an infrared radiation longer than the maximum radiation energy. The wavelength converter emits radiation preferably with a maximum energy wavelength in the range of 3000 nm to 5000 nm.