Molded resin articles
US6437048B1 · kind B1 · utility
Assignee
Inventors
- Jun Saito
- Hideo Nobuhara
- Shingo Kikukawa
- Hitoshi Sato
- Akira Yamauchi
- Kazuhiro Kimura
- Tadashi Tanaka
- Yoichi Kugimiya
- Yoshitaka Morimoto
- Hiroaki Ito
- Tooru Fukazawa
- Hiroyuki Maehara
- Yasuhiro Shiraishi
- Yuichi Yamanaka
- Masataka Sugimoto
- Hirohisa Ishii
- Masahiko Taniguchi
- Toshiki Yamamoto
- Yasuhiko Nakagawa
- Junichiro Yokota
- Shouji Kawano
Key dates
| Filing date | Jul 7, 1998 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jul 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1352
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A plastic molded product of olefin (co)polymer composition comprises 0.01-5.0 weight parts high molecular weight polyethylene with an intrinsic viscosity &eegr;E in the range of 15-100 dl/g measured in 135° C. tetralin and preferably 100 weight parts polypropylene. The high molecular weight polyethylene has an average particle size in the range of 1-5000 nm and is finely dispersed as fine granules in the polypropylene, so that high melt strength and high crystallization temperature are attained, enabling various molding methods to be performed with high speed productivity. Using the polymer composition, plastics such as a resin foam, a film, a sheet, a layered plastic article with a coated substrate surface, a hollow plastic article, an injection molded plastic article, a fiber, a nonwoven web or a continuous tube-shaped plastic are provided. The olefin (co)polymer composition is obtained by preparing high molecular weight polyethylene granules using e.g. a titanium transition metal compound catalyst, and adding these, e.g. as a polymerization catalyst of propylene, singly or together with a polyolefin preparing catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.