Decay-resistant paper for the manufacture of a pot for raising and transplanting seedlings, and the process for producing the same
US5470434A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H25/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Decay-resistant paper suitable for the manufacture of a pot for raising and transplanting seedling is the one partly containing decayable portions, which is prepared by heating paper made of a natural fiber, or a fiber blend composed of a natural fiber and a synthetic fiber, and impregnated with a compound capable of crosslinking the paper cellulose, at a temperature causing the reaction of antidecay treatment and at a temperature causing no such reaction in different portions. Such decay-resistant paper partly containing decayable portions can be easily prepared by bringing the above-mentioned paper impregnated with a compound capable of crosslinking the paper cellulose into contact in a single step with a heating apparatus comprising a heating part of a temperature causing the reaction of antidecay treatment and a heating part of a temperature causing no such reaction. As such a heating apparatus, may be used the one in which a rotary roll heater or a press-type heating plate is coated with a jacket having openings which is made of a material such as iron, copper and aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.