Mulching paper sheet
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United States of America Patent
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Aug 17, 1999
Issued Date -
N/A
app pub date -
Sep 8, 1997
filing date -
Feb 1, 1995
priority date (Note) -
Expired
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Abstract
A mulching paper sheet having satisfactory mechanical strength, elongation, weathering resistance and biodegradation resistance while being used for plant culture, includes a paper sheet substrate formed mainly from a cellulosic pulp; a biodegradation-retarding agent comprising humic acid and/or a water-insoluble metal salt of humic acid and coated on or impregnated in the substrate; and optionally an antimicrobial agent contained in at least the longitudinal side edge portions of the paper sheet substrate.
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