Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
COMPOSITE MATERIAL INCLUDING CARBON FIBERS AND THERMOPLASTIC RESIN, MOLDED BODY PRODUCTION METHOD USING SAME, AND MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2018/143283
Kind Code:
A1
Abstract:
The present invention provides: a composite material including carbon fibers having a weight average fiber length of 1-100 mm and a thermoplastic resin, wherein said composite material satisfies K1≤1.5×K2 and exhibits excellent conformability during a stretching step in press molding; and a press molded body production method using said composite material. K1 represents the inclination of an approximate straight line obtained by performing strain sweep tests from 0 to 100% on the composite material at a temperature of 270°C, a shear of 100 rad/sec, and a normal load of 2 N, plotting, both in logarithmic scales, the values of strain% versus the values of complex viscosity coefficient Pa·sec in the range of not less than 35% strain, and performing linear approximation thereon. K2 represents the inclination of an approximate straight line obtained by performing strain sweep tests from 0 to 100% on the composite material at a temperature of 270°C, a shear of 100 rad/sec, and a normal load of 2 N, plotting, both in logarithmic scales, the values of strain% versus the values of complex viscosity coefficient Pa·sec in the range of less than 35% strain, and performing linear approximation thereon.

Inventors:
NOMURA AKIHISA (JP)
Application Number:
PCT/JP2018/003239
Publication Date:
August 09, 2018
Filing Date:
January 31, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TEIJIN LTD (JP)
International Classes:
B29B11/16; B29C70/40; C08J5/04; B29K71/00; B29K77/00; B29K101/12
Domestic Patent References:
WO2017056693A12017-04-06
WO2014084194A12014-06-05
WO2013133421A12013-09-12
WO2013094706A12013-06-27
Foreign References:
JP2008540818A2008-11-20
JP2005263828A2005-09-29
JP2011012206A2011-01-20
JP2013056976A2013-03-28
JPH06335934A1994-12-06
JPH11241017A1999-09-07
US20150031257A12015-01-29
US8946342B22015-02-03
JP2013049208A2013-03-14
JP2017018358A2017-01-26
Other References:
See also references of EP 3578330A4
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: LED DRIVE CIRCUIT, LED DRIVE DEVICE, AND LED DRIVE SYSTEM

Next Patent: FIBER LASER, SUPPLY METHOD, AND MANUFACTURING METHOD