| 摘要 |
PROBLEM TO BE SOLVED: To provide a geogrid having large, high-strength pull-out resistances and penetration resistances in many directions as well as softness, proper workability and a low cost, and to provide its manufacturing method. SOLUTION: This geogrid is produced by multi-spindle laminated unwoven fabrics of high-strength yarns of 3-spindle or 4-spindle laminated unwoven fabrics as its constituent raw materials with their jointing points between the yarns of the multiple laminated unwoven fabrics strengthened; also a low-cost geogrid having the flexibility can be produced by jointing only the joint portions of the yarns with an adhesive; and multiple spindles also, in the laminating process of multiple spindle laminated unwoven fabrics, a geogrid comprising multi- spindle laminated unwoven fabrics of high-strength yarns can be manufactured by performing jointing processing and thermal processing, in a state with the high strength yarns obliquely intersected being held with pins of the laminating devices.
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