Filler and floatability material manufacturing process and tubular units that incorporate this material
US5218016A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1990 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jul 5, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD07B2501/2061
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A filler and floatability material is an extruded admixture of a thermoplastic resin material and a mineral or organic load lightening material that resists against hydrostatic pressure. The admixture contains 50 to 80% by volume of a polyolefin or a polydiolefin homo- or copolymer as the thermoplastic resin material and 50 to 20% by volume of hollow microspheres as the load lightening material that resists against hydrostatic pressure. The filler and floatability material displays a density ranging from 0.65 to 0.85, elasticity which is greater than 10% distortion, uniaxial compression strength equal to at least 60 bar and water absorption under 50 bar pressure which is lower than 5% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.