Sandwich panel core
US7771813B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 11, 2003 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | May 15, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24661
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention can be defined in its most general form as a 3-D light core from sheet material, especially from “NOMEX” polymeric paper, and can be used in production of sandwich panels as applied in aircraft production, construction and other branches of industry. With the aim to improve the core mechanical and unit weight properties, the paper base is perforated thereby increasing the base-binder bonding strength, whereof the binder is applied onto both sides of the base to increase its structure rigidity, owing to bonding of binder layers in-between at the locations of the holes. The quantity of the holes and their diameter are defined in a formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.