PACKAGE OF A HEAT-BENT POLARISING SHEET PACKAGE AND INJECTION-MOULDED POLARISING LENS

Title:

PACKAGE OF A HEAT-BENT POLARISING SHEET PACKAGE AND INJECTION-MOULDED POLARISING LENS

Document Type and Number:

WIPO Patent Application WO/2019/054295

Kind Code:

A1

Abstract:

[PROBLEM] To provide: a package of a heat-bent polarising sheet that does not require any preparatory drying process before injection moulding and does not require any substantial protective-film removal work even after being preserved (stored, conveyed, transported) and the like; and an injection-moulded polarising lens that uses said heat-bent polarising sheet. [SOLUTION] Provided is a package of a heat-bent polarising sheet for producing an injection-moulded polarising lens, and an injection-moulded polarising lens that uses said sheet, in which: a laminated polarising sheet, prepared by bonding a transparent plastic sheet onto both sides of a polarising film formed of a uniaxially-stretched polyvinyl alcohol resin film with an adhesive layer interposed therebetween, is used as an individual laminated polarising sheet that has an original plate shape for individual lenses; the individual laminated polarising sheet is heat-bent to form a spherical surface or an aspherical surface under heating to prepare a heat-bent polarising sheet; the heat-bent polarising sheet is set onto a mould; and a transparent resin for lenses is injection-moulded onto a concave surface of the heat-bent polarising sheet. The heat-bent polarising sheet is cumulatively packaged by means of a non-adhesive release film so as to withstand moisture, and is then preserved or transported. The package can be used in injection moulding without requiring any preparatory drying process before injection moulding or any substantial protective-film removal work. Also provided is an injection-moulded polarising lens that uses said package.

Inventors:

KIMURA HIDEAKI (JP)
AKAKI MASAYUKI (JP)
FUJII TAKASHI (JP)

Application Number:

PCT/JP2018/033214

Publication Date:

March 21, 2019

Filing Date:

September 07, 2018

Export Citation:

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Assignee:

WINTEC INC (JP)
MITSUBISHI GAS CHEMICAL CO (JP)
MGC FILSHEET CO LTD (JP)

International Classes:

G02B5/30; B29C45/14; B29C45/26; B65D77/04; B65D81/20

Domestic Patent References:

WO2016067937A1	2016-05-06
WO2014084154A1	2014-06-05
WO2016067937A1	2016-05-06

Foreign References:

JP2003145616A	2003-05-20
JP2011110879A	2011-06-09
JPH05119216A	1993-05-18
JP2008262104A	2008-10-30
JP2006145254A	2006-06-08

Other References: