Hollow vessel for heat sterilization
US6242535A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hollow vessel for heat sterilization, which is superior in the transparency and in the impact resistance with scarce odor, made of a polyolefin resin having characteristic properties comprising PA1 an underwater light transmittance of 70-99% resulting from determination of light transmission at a wave length of 450 nm for a resin specimen of a thickness of 0.5 mm which has been subjected to a heat sterilization treatment with steam at a temperature of 121.degree. C. for 20 minutes; PA1 a tensile elastic modulus of 200-700 MPa, determined according to ASTM D 638 for a resin specimen of a thickness of 0.5 mm which has been subjected to a heat sterilization treatment with steam; PA1 a haze value difference .DELTA. Haze of 1-20%, determined according to ASTM D 1330 for a resin specimen of a thickness of 0.5 mm respectively before and after a heat sterilization treatment thereof with steam; and PA1 a high-speed impact strength of 1.5-10 J, determined on an impact test at 0.degree. C. as the total rupture energy required for rupturing a resin specimen of 0.5 mm.times.9 cm.times.9 cm which has been subjected to a heat sterilization treatment with steam, wherein the impact test is carrie…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.