Title:
MULTILAYER SHEET, WORKPIECE, CONTAINER, PACKAGING CONTAINER, AND PACKAING CONTAINER MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2014/065354
Kind Code:
A1
Abstract:
The thickness of the intermediate layer (12) in a multilayer sheet (10) provided with a base layer (13), an intermediate layer (12), and a surface layer (11) in said order is 35 µm to 100 µm and the value of the loss tangent (tanδ) at 165°C is 0.18 to 0.50. A tray-shaped container body obtained by molding said multilayer sheet (10) and a lid member are heat-sealed with a ring-shaped sealing plate. The sealing section of the ring-shaped sealing plate is provided with: a rounded curved surface on the inner margin; and an inclined surface provided so as to be continuous with the curved surface and, on the outer margin side, inclined with respect to the surface to be heat-sealed. The radius of curvature (R) of the curved surface is made to be larger than 0.5 H. Even with a container body molded from a thin multilayer sheet (10), it is possible to form a resin build-up section near the inner margin of the heat-sealed section and an easy-open container that is tightly sealed and easy to open is obtained.
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Inventors:
TAKEMOTO NORIKO (JP)
Application Number:
PCT/JP2013/078773
Publication Date:
May 01, 2014
Filing Date:
October 24, 2013
Export Citation:
Assignee:
IDEMITSU UNITECH CO LTD (JP)
International Classes:
B32B7/02; B32B27/32; B65B7/28; B65D1/00; B65D1/26; B65D1/34; B65D65/40; B65D77/20
Domestic Patent References:
| WO2009123286A1 | 2009-10-08 | |||
| WO2005030466A1 | 2005-04-07 |
Foreign References:
| JP2004167774A | 2004-06-17 | |||
| JP2000273408A | 2000-10-03 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
Bottom intellectual property office of patent business corporation Tatsuyuki (JP)
Bottom intellectual property office of patent business corporation Tatsuyuki (JP)
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