Title:
METHOD FOR MANUFACTURING MOLDED ARTICLE BY INFLATION MOLDING
Document Type and Number:
Japanese Patent JP2007237654
Kind Code:
A
Abstract:
To provide an inflation molding method excellent in productivity, optical characteristics such as transparency and glossiness, and mechanical characteristics.
In this inflation molding method, a mixture containing polyethylene and a polyethylene wax is inflation-molded. In the polyethylene, a density is in the range of ≥900 (kg/m3) and <940 (kg/m3), and number average molecular weight on a polyethylene basis, which is measured by GPC, is 10,000 or more. In the polyethylene wax, a density is in the range of 890-980 kg/m3, and number average molecular weight measured by the GPC is in the range of 500-4,000. The polyethylene wax satisfies a relationship which is expressed by the expression: B≤0.0075×K. In the expression, B represents the content ratio (wt.%) of a component in which molecular weight on the polyethylene basis in the polyethylene wax in the case of measurement by the gel-permeation chromatography is 20,000 or more, and K represents the melt viscosity (mPa s) of the polyethylene wax at 140°C.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
UOSAKI HIROTAKA
KAWABE KUNIAKI
YASUI MOTOYASU
NAKAMURA HIDEO
AMADA YASUSHI
KUROKI HIDEKI
Application Number:
JP2006065529A
Publication Date:
September 20, 2007
Filing Date:
March 10, 2006
Assignee:
MITSUI CHEMICALS INC
International Classes:
B29C48/32; C08J5/18; C08L23/04; B29K23/00
Domestic Patent References:
| JP2004059867A | 2004-02-26 | | | |
| JP2004059868A | 2004-02-26 | | | |
| JP2003528948A | 2003-09-30 | | | |
| JP2003335869A | 2003-11-28 | | | |
| JP2002234125A | 2002-08-20 | | | |
Attorney, Agent or Firm:
Shunichiro Suzuki
Koji Makimura
