Packaging film
US8435622B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2006 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Jun 30, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A packaging film with a main film made of a stretchable polymer film material and having a multiplicity of holes. A first condition of the main film including that a ratio of aeration percentage over final weight is greater than or equal to 14 meters per gram. A second condition of the main film is that the width of the packaging film is reducible by less than 15% between a condition before any stretching of the packaging film and a condition when the packaging film is stretched at an elongation equal to the elongation at the NDR point. A third condition of the main film is that a ratio of an absolute value of the difference of a holding force of the packaging film minus a predetermined target holding force divided by the target holding force is less than or equal to 5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.