| 摘要 |
PROBLEM TO BE SOLVED: To suppress the outflow of cement milk occurring when a texture or a stitch is opened before the pressure in a bag body reaches the breaking pressure even if the cement milk is used as an injection material for filling the bag body therewith in every corner. SOLUTION: A bag body part 21 comprises a bag formed by joining the fabric so woven with a yarn with a thickness of 1,100 dtex or below that the air permeability is 3 cm<SP>3</SP>/cm<SP>2</SP>*s or below. An injection port 22 is formed in the bag body part 21 so that the injection material can be injected into the bag body part. COPYRIGHT: (C)2009,JPO&INPIT
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