Jumbo bag production process requirements

1. Performance test: Flexible jumbo bags used for export commodity transportation packaging must be carried out top lifting test, tipping test, vertical impact drop test, upright test, tear propagation test, etc. Only vertical impact drop test, dumping test and substrate test are carried out on the lift type flexible container bag.

① Top lifting test: hold pressure for 5min at 6 times the load.

② Vertical impact drop test: 0.8m height free fall.

③ Dumping test: pull the shelf at a height of 0.8m, lift one end of the movable plate, and make the sample bag fall on the ground.

④ Upright test: Lift the single or double belt near the ground (if there are four straps), so that the bag body off the ground.

The above tests must have no damage to the bag body and sling, and no leakage of the contents.

⑤ Tear propagation test: a cut of 100mm in length and 45° on the vertical line is drawn on the bag body, lifted off the ground, applied twice the load, and kept for 5min. The incision propagation length should not exceed 25% of the original incision length.

2. Appearance:

① The warp and weft of the base cloth are not allowed to break 2 holes in the same place, and the thin file with less than 2 roots is not allowed to appear in 100mm2, and obvious misweaving is not allowed.

② The composite quality problems such as cracking, lack of film, delamination, bubble and hard mass are not allowed in the substrate coating film.

③ Sewing requirements are straight, no needle off, broken thread, floating thread, no hanging needle, over needle, and no less than 3 stitches at the drop point.

④ The sling is required to be equal in length, and the limit deviation is 40mm.

⑤ The printing pattern, text and mark are correct and clear, and the position is accurate.