METHOD OF PRODUCING LAMINATED BOTTLES HAVING PEELABLE INNER LAYER

Title:

METHOD OF PRODUCING LAMINATED BOTTLES HAVING PEELABLE INNER LAYER

Document Type and Number:

WIPO Patent Application WO/2001/026881

Kind Code:

A1

Abstract:

A method of producing laminated bottles having an outer layer and an inner layer peelably laminated to the inner surface of the outer layer, comprising the step of injection molding a preform for the outer layer by melt injection of a first resin, the step of injection molding a preform for the inner layer on the inner surface side of the outer layer preform, by melt injection of a second resin, and the step of blow molding a parison composed of the outer layer preform and inner layer preform to provide the laminated bottle. The melting point of the second resin is lower than that of the first resin, whereby even if the inner layer is formed of a resin material having a lower melting point than that of the outer layer, an appropriate lamination structure can be obtained while providing a parison of high precision by injection molding and achieving facilitation of partial bonding between the inner and outer layers. Further, air vents are easily and reliably formed in the outer layer without damaging the inner layer.

Inventors:

HAMAMOTO KEIJI (JP)
MITSUHASHI HIROKAZU (JP)

Application Number:

PCT/JP2000/006862

Publication Date:

April 19, 2001

Filing Date:

October 02, 2000

Export Citation:

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Assignee:

TAISEI KAKO CO (JP)
HAMAMOTO KEIJI (JP)
MITSUHASHI HIROKAZU (JP)

International Classes:

B29C37/00; B29C45/16; B29C45/33; B29C49/00; B29C49/22; B29C43/00; B29C49/04; B29C49/06; B29C49/12; (IPC1-7): B29C49/06; B29C49/22; B29B11/08; B29C45/16

Foreign References:

JPH06238708A	1994-08-30
JPH05213373A	1993-08-24
JPH10180853A	1998-07-07
US5301838A	1994-04-12
JPH10128833A	1998-05-19
JP2000043126A	2000-02-15

Other References: