| 摘要 |
PURPOSE: To obtain an agricultural sheet excellent in mechanical properties, dimensional stability, light transmittability, air permeability and lightwelghtness, useful as, e.g. an agricultural covering material for solid setup, by using polypropylene fibers having each specific number of leaves of multi-leafed crosssection, circumscribed circle diameter of the cross-section and degree of modified cross-section. CONSTITUTION: This agricultural sheet consists of a long-fiber nonwoven fabric 5-30g/m<2> in METSUKE, which is obtained by using polypropylene fibers having the following characteristics: the number of leaves of multi-leafed cross-section: 3-6; the diameter of the circumscribed circle of the cross-section: >=25μm (pref. 30-40μm); and the degree of modified cross-section (D/d): 1.5-4. This sheet has both air permeability and light transmittability similar to the case with nonwoven fabrics with low METSUKE comprising fibers with circular cross-section.
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