Title:
FILM FOR PLANT CULTIVATION
Document Type and Number:
WIPO Patent Application WO/2012/043192
Kind Code:
A1
Abstract:
[Problem] To provide: a polyvinyl alcohol film for plant cultivation that can inhibit the penetration of roots and that has excellent nutrient permeability; a method for producing the film; and a method for cultivating plants by using the film. [Solution] The disclosed polyvinyl alcohol film for plant cultivation has an average birefringence value of 4.0×10-3-12.0×10-3 and a swelling degree of 150-180%, the average birefringence value being found by averaging, in the thickness direction, the birefringence rates measured in the machine direction. The disclosed method for producing a polyvinyl alcohol film for plant cultivation involves: a step of stretching a polyvinyl alcohol film having a moisture content of 5-20% by mass to 1.3-1.7 times the original dimension thereof; and a step of thermally treating the stretched film at a temperature within the range of 130-170°C. The disclosed method for cultivating plants involves cultivating a plant in a manner such that the plant is placed in direct contact with said polyvinyl alcohol film for plant cultivation.
Inventors:
TAKAFUJI MASAHIRO (JP)
ISOZAKI TAKANORI (JP)
ISOZAKI TAKANORI (JP)
Application Number:
PCT/JP2011/070596
Publication Date:
April 05, 2012
Filing Date:
September 09, 2011
Export Citation:
Assignee:
KURARAY CO (JP)
TAKAFUJI MASAHIRO (JP)
ISOZAKI TAKANORI (JP)
TAKAFUJI MASAHIRO (JP)
ISOZAKI TAKANORI (JP)
International Classes:
A01G31/00; B29C41/24; B29C55/06; C08J5/18; B29K29/00; B29L7/00
Foreign References:
| JP2008000052A | 2008-01-10 | |||
| JP2008154505A | 2008-07-10 | |||
| JP2008193980A | 2008-08-28 |
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Claims: