METHOD FOR HOLDING POLYCARBONATE PELLETS

Title:

METHOD FOR HOLDING POLYCARBONATE PELLETS

Document Type and Number:

WIPO Patent Application WO/2001/062459

Kind Code:

A1

Abstract:

A method for holding polycarbonate pellets, characterized in that polycarbonate pellets (A), which has, attached thereto, foreign matter particles having a particle diameter of 0.5 to 10 $g(m)m in an amount of 10,000 pieces/g or less, are held so as to have an electrostatic potential within the range of ± 10 kV during the process steps until the melting for producing polycarbonate formed products. The method allows holding polycarbonate pellets in the state of having foreign matters attached to the surface in an extremely small amount and accordingly can be advantageously employed as a method of holding pellets for optical disk use.

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Inventors:

FUNAKOSHI WATARU (JP)
KANEKO HIROAKI (JP)
SASAKI KATSUSHI (JP)

Application Number:

PCT/JP2001/001299

Publication Date:

August 30, 2001

Filing Date:

February 22, 2001

Export Citation:

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Assignee:

TEIJIN LTD (JP)
FUNAKOSHI WATARU (JP)
KANEKO HIROAKI (JP)
SASAKI KATSUSHI (JP)

International Classes:

B08B17/02; B29B13/00; (IPC1-7): B29B13/00; B29B9/00; C08G64/40; C08L69/00

Foreign References:

EP0316622A2	1989-05-24
JPH0839550A	1996-02-13
US5494171A	1996-02-27
JPH11165342A	1999-06-22
US5516878A	1996-05-14
JPH09165442A	1997-06-24
US5965639A	1999-10-12
JPH1112454A	1999-01-19
JP2000034398A	2000-02-02
US5762851A	1998-06-09

Other References: