General, comp-osite packing sack consists of 2-layers of national standard sack-making paper outside and inside, with glued net vinylon yarn in between, thus combining 3 in 1.

• 纸纱复合包装袋其结构为内外二层国标纸袋纸，中间粘结网状维纶水溶纱，三位一体复合而成。