Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICS-USE RESIN MOLDED BODY PRODUCTION METHOD, RESIN FIBER PRODUCTION METHOD, AND RESIN FIBER PRODUCTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/241760
Kind Code:
A1
Abstract:
This optics-use resin molded body production method comprises: (i) depressurizing the interior of a vessel wherein a molten optics-use resin is being held; (ii) pressurizing the interior of the vessel wherein the molten optics-use resin is being held; and (iii) molding the optics-use resin, which has been removed from the vessel, into a prescribed form. The (i) and (ii) steps are performed alternately at least once. In the (i) step, the time t1 [min] during which the interior of the vessel is depressurized is set in such a manner that the time t1 and the viscosity μ1 [Pa・s] of the molten optics-use resin fulfill the relationship: μ1/t1 < 200. In the (ii) step, the time t2 [min] during which the interior of the vessel is pressurized is set in such a manner that the time t2 and the viscosity μ2 [Pa・s] of the molten optics-use resin fulfill the relationship: μ2/t2 < 200. The viscosity μ1 represents the viscosity of the optics-use resin under a shear rate of 0.05 s-1, at the temperature inside the vessel in the (i) step. The viscosity μ2 represents the viscosity of the optics-use resin under a shear rate of 0.05 s-1, at the temperature inside the vessel in the (ii) step.

Inventors:
SAOMOTO KENJIRO (JP)
SUGIURA SHINSUKE (JP)
OKADA YASUAKI (JP)
IRIE SHO (JP)
Application Number:
PCT/JP2021/020554
Publication Date:
December 02, 2021
Filing Date:
May 28, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B29B13/00; B29C48/06; B29C48/21; B29C48/285; B29C48/365; B29C48/37; C08J99/00; G02B1/04; G02B6/02
Domestic Patent References:
WO2019203349A12019-10-24
Foreign References:
JP2019049658A2019-03-28
JPH10329188A1998-12-15
JP2006137068A2006-06-01
JP2001341124A2001-12-11
JPS5314828A1978-02-09
JP2007504125A2007-03-01
JP2000356716A2000-12-26
KR101298068B12013-08-20
Attorney, Agent or Firm:
KAMADA Koichi et al. (JP)
Download PDF: