Title:
METHOD FOR PRODUCING GLASS FIBER REINFORCED POLYESTER-BASED RESIN COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/203914
Kind Code:
A1
Abstract:
Provided is a method for producing a glass fiber reinforced polyester-based resin composition comprising (A) 10-60 mass% of a polyester resin, (B) 40-70 mass% of glass fibers, and (C) 0-50 mass% of other polymers or additives, by means of a biaxial extruder, the method being characterized in that: the resin composition has a shear viscosity at 265 °C and 91/sec of 400-2,000 Pa·s; and when strands are extruded from a horizontal flat die installed on a die holder at the tip of the biaxial extruder, the temperature of the strands from a die hole at the center of the flat die is 295-340 °C, and the temperature of the strands from a die hole at the end of the flat die is lower by 4-14 °C than the temperature of the strands from the die hole at the center of the flat die.
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Inventors:
TAJIRI TOSHIYUKI (JP)
TAKEHANA MASARU (JP)
TAKEHANA MASARU (JP)
Application Number:
PCT/JP2023/009196
Publication Date:
October 26, 2023
Filing Date:
March 10, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
B29B9/06; B29B7/48; B29B9/14; B29C48/345; B29C48/875; B29C48/92; C08J3/215
Foreign References:
| JP2001205627A | 2001-07-31 | |||
| JP2015036383A | 2015-02-23 | |||
| US20180043600A1 | 2018-02-15 |
Attorney, Agent or Firm:
ATAGO IP (JP)
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