Bulk Bags – Bulk bags – Design and manufacturer of bulk bags – Bulk Bags, 1ton bags, polypropylene bulk bags, FIBC bulk bags, poly woven bulk bags. These are all names for a flexible intermediate bulk container (FIBC), which is commonly referred to as bulk bags. Bulk bags are industrial containers made of flexible fabric that is designed for storing and transporting dry, flowable products. Bulk bags are made of thick woven polypropylene, either coated or uncoated.
Bulk bags are used for a wide variety of products in the mining, agricultural and industrial sectors. This includes products like:
- Soda ash
- Pre-mix cement
Sak ‘n Pak is a leading manufacturer of bulk bags in South Africa. We design and manufacture bulk bags to every customer’s specific needs, from ½ ton to 1.5 ton. We offer a wide variety of bulk bags which includes the following:
- Standard polypropylene material, 150 to 200 GSM
- Laminated polypropylene material
- Open top bulk bags
- Bulk bags with liners
- Bottom spout
- Top spout
- Duffel top
- 1- 4 Colour printing
- All Bulk Bag fabric and webbing is UV stabilized
The bulk bag manufacturing process consists of three basic steps.
Extrusion: Virgin polypropylene granules, calcium carbonate, ultra violet stabilizer and colour pigment being melted and converted into tapes in an extrusion plant. This is the first stage and determines the tensile strength of the tapes.
Weaving: The extruded tape bobbins are loaded on to a creel (warp tapes) and threaded through the headle wires of a circular loom. Weaving looms consists of 4, 6 and 8 shuttles which are loaded with bobbins (weft tapes). Here the tapes will be woven into fabric of a required GSM and size, and will be wound in roll form.
Converting: This consists of a cut, print and sew operation. All the different components are cut to size with heat cutters. This includes polypropylene material for the main body, webbing for the lifting loops and other accessories like spouts and tops. Next the bulk bag fabric is printed on an individual single pass flexographic printer before all the components are sewn together with manual sewing machines to form a completed bulk bag.