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Patent Searching and Data


Title:
RESIN SHEET AND RESIN-SHEET MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/065489
Kind Code:
A1
Abstract:
The present invention provides a resin sheet including a plurality of aspherical portions having small variations in thickness precision and having high shape precision. A resin-sheet manufacturing method according to the present invention is a method for manufacturing a resin sheet including a plurality of separate aspherical portions by subjecting a thermoplastic resin film formed by using a thermoplastic resin to thermal press molding, wherein the thermal press molding is performed at a press temperature that is higher than the glass transition temperature of the thermoplastic resin by at least 40°C, while boosting the press pressure to a final press pressure at an average boost rate of at most 0.1 MPa/s.

Inventors:
SAWAGUCHI TAICHI (JP)
SUDEJI HIRONARI (JP)
Application Number:
PCT/JP2020/034989
Publication Date:
April 08, 2021
Filing Date:
September 15, 2020
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
G02B3/00; B29C43/22; B29C43/52; G02B1/04; G02B3/04
Foreign References:
JP2009090616A2009-04-30
JP2011224990A2011-11-10
JP2004198536A2004-07-15
JP2010264652A2010-11-25
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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