| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag for construction material, equipped with a net hardly torn and capable of decreasing use of a net yarn to decrease the total weight of the net. SOLUTION: A bag (a) for construction materials including a net 1 involving fill (b) and having a square mesh opening is provided, wherein the net 1 is knitted by using a net yarn bundled plural raw threads of synthetic fiber having≥4 cN/dtex tensile strength and 12-30% breaking elongation, and the twine tensile strength A (N), the major axis B (mm) of fill (b) (maximum size when projecting on a plane the fill) and the size C (mm) of the scale of mesh satisfy a relation 100×A<SP>2</SP>/(B<SP>2</SP>×C)≥8. COPYRIGHT: (C)2007,JPO&INPIT
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