PROBLEM TO BE SOLVED: To provide a weed-proof sheet having biodegradability, maintaining required light blocking properties and water permeability, and further having adhesiveness to the ground surface.SOLUTION: The biodegradable weed-proof sheet is formed of an integrated nonwoven fabric by using as a constituent fiber a filament which essentially consists of a polylactic acid-based polymer, the constituent fiber being three-dimensionally entangled. The biodegradable weed-proof sheet has 100 N/5 cm-width or smaller load, at 10% elongation measured according to JIS L 1906 Standard.COPYRIGHT: (C)2008,JPO&INPIT【課題】生分解性を有し、かつ所要の遮光性と透水性とを保ったうえで地面との密着性を備えた防草シートを提供する。【解決手段】ポリ乳酸系重合体を主体成分とする長繊維を構成繊維とするとともに、その構成繊維同士が三次元交絡することで一体化された不織布にて形成される。JIS L 1906に準じて測定された10%伸長時の荷重が100N/5cm幅以下である。【選択図】なし
