Use of an air permeable composite sheet material for propagation plugs for organic production
US11207806B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2017 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G24/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to the production of propagation plugs, primarily small blocks of sphagnum for the growing of cuttings and seed plants, and of the type consisting of a cylindrical block having an envelope of paper or a similar material and an associated filling of sphagnum or a corresponding substrate material. The paper is an air permeable composite sheet material comprising a) a biodegradable nonwoven sheet material; and b) a hot melt adhesive comprising at least 50% w/w of one or more biodegradable bioplastics. The hot melt adhesive is supplied to at least a part of a face of the biodegradable nonwoven sheet material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.