Flexible container bag is polyethylene or polypropylene resin as the main raw material, the use of which in transport is becoming more and more frequent. Are you curious about how it is made？Flexible container bag is polyethylene or polypropylene resin as the main raw material, the use of which in transport is becoming more and more frequent. Are you curious about how it is made？
Flexible container bag is polyethylene or polypropylene resin as the main raw material, add a small amount of auxiliary materials, mixed by the extruder melt extrusion plastic film, cut into filaments, stretching at a temperature lower than the resin melt, through the molecular orientation and heat setting made of high-strength, low elongation of the flat wire, and then by the whole, weaving, re-film made of plastic woven fabric for the base cloth, and sling, girth stitching made of flexible container bag. Among them, the sling is also made by the process of mixing, drawing, weaving, etc. At present, a kind of sling woven by the cracked silk is being increasingly widely used, it has a low gram weight, high tensile strength, beautiful and other characteristics.
For the flexible container bag used as export commodity transport packaging, according to SN/T0264-93 "export commodity transport packaging flexible container bag inspection procedures", handle flexible container bag according to SN/T0183-93 "export commodity transport packaging handle container bag inspection procedures," the provisions of the test, and reference to GB10454 -89 "flexible container bag" implementation.
(1) Appearance.
◆Base cloth warp and weft threads are not allowed to appear in the same place broken 2 holes, in 100mm2 not allowed to appear less than 2 thin file, not allowed to appear obvious misweave.
◆The base fabric coating does not allow cracking, lack of film, layering, bubbles, hard lumps and other compound quality problems.
◆Sewing requirements flat and straight, no off-needle, broken thread, floating thread, no hanging needle, super needle, no less than 3 stitches back at the needle drop.
◆The sling is required to be of equal length with a limit deviation of 40mm.
◆Printing pattern, text and markings are correct, clear and accurately positioned.
(2) Performance inspection: flexible container bags used as export commodity transport packaging, shall be top lifting test, tipping test, vertical impact drop test, orthostatic test, tear propagation test, etc.. Lift the flexible container bag only for vertical impact drop test, tipping test and base cloth test.
◆Top lifting test: 6 times the load to keep pressure for 5min.
◆Vertical impact drop test: 0.8m height free fall.
◆Dumping test: 0.8m height tug down on the rack, lift one end of the movable plate, so that the sample bag falls to the ground.
◆Positioning test: lift a single or double belt near the ground (if there are four straps), so that the bag body off the ground. All of the above tests require the bag body and sling to be unbroken and the contents not spilled.
◆Tear propagation test: bag body scribed on a length of 100mm with the vertical line into 45 ° of the incision, lifting off the ground, apply 2 times the load, keep 5min. incision propagation length should not exceed 25% of the length of the original incision.
Jinan Tumu Packaging Materials Co., Ltd. is one of the reliable and professional manufacturer and exporter of FIBC bulk bag (Flexible Intermediate Bulk Containers) and so on. Please do not hesitate to ask for a free quotation!
