Base material for honeycomb core structure and process for producing the same
US4710432A · kind A · utility
20Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1986 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/611
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A base material for a honeycomb core structure comprises a paper-like polyester fiber sheet comprising 20% to 80% by weight of drawn polyester staple fibers which preferably have a flat cross-sectional profile having a flatness, which refers to a ratio in length of a major axis to a minor axis of the profile, of from 2.5 to 30.0, 20% to 80% by weight of the sum of undrawn polyester staple fibers and other polyester staple fibers having a lower melting point than that of the undrawn polyester fibers, and having a porosity of 60% or less and a resistance to permeation of air of 100 sec/100 ml or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.