Baffles – Consists of pieces of fabric sewn across each corner of a tubular or U -panel bag to improve the bag’s ‘squareness’, ideal for packaging very fine powders.
Bag Height – Height of a bulk bag measured from the Top Seam to the Bottom Seam.
B-loc – A type of cordlock used to fasten the draw cord attached to the top or bottom spout. B-Loc provides a secure closure, as well as a more convenient release of the bag contents. It is recommended for bulk bags with a high SWL as their closure and release properties help avoid personnel injury. B-loc is also utilized on bulk bags that require frequent handling, as they are more durable than regular tie straps or plastic tubes. Also called ‘Fiblock’ or ‘B-lock’.
Body Fabric – The tubular portion of a seamless or circular woven bag.
Bottom Panel Fabric – The material on the bottom of a tubular or 4-Panel bag.
Bottom Spout – Also called a Discharge Spout, used as an outlet to empty the contents of a bulk bag.
Breathable Fabric / Bags – Uncoated or non-laminated fabric / bags.
Circular Woven Bag – Also called a tubular bag, it is made from fabric woven on a circular loom, which is then cut to the proper length for a specified bag height, thereby eliminating the seams on each of the bag’s sides.
Coated Fabric / Bags – Fabric or bag which is coated / laminated with Polypropylene (PP) to prevent moisture intrusion or sifting of the contents. Also called Non-breathable or Laminated fabric / bags.
Conical Bottom – A variation of an outlet, where the bottom spout is shaped like a pyramid, this is achieved by assembling 4 pieces of trapezoidal shaped fabric.
Conical Top – A variation of an inlet, where the top is shaped like a pyramid, this is achieved by assembling 4 pieces of trapezoidal shaped fabric. Also called ‘Cone Top’.
Cordlock – A closure device to hold the rope or cord in place on the spout -typically used on the discharge of bags. It can be a plastic hose, or a B-loc.
Corner Loops – Loops that are sewn along the seams on the edges of the body of the bag. Used with U-Panel bags or 4-Panel bags.
Cross Corner Loops – Loops that are sewn several inches in from the seams on the edges of the bags. These loops tend to ‘stand up’ on a filled bag and make it easier to pick up with a forklift. Used with circular woven bags.
Denier – The weight of yarn measured in grams per 9,000 meters
Discharge Spout – Also called a Bottom Spout, used as an outlet to empty the contents of a bulk bag.
Document Pouch – Typically made of either polyethylene or polypropylene, it is where shipping or identifying documents are usually placed. Also called a Pocket or Envelope.
Draw Cord – A cotton or nylon rope, about ¼” diameter, that is installed in the outer layer of Star Bottom and Double Discharge Spout for closure. A hose or a B-loc may be installed with the draw cord for cord closing purpose.
Duffel Bottom – A type of bottom or discharge spout that usually uses a drawstring closure, where the duffel is folded and secured with a drawstring closure.
Duffel Top – A type of inlet for bulk bags extending upwards from the top seam (like an inverted skirt) and following the bag’s base dimensions. Normally constructed with a light coated PP woven fabric and with two ties sewn attached for closing after bag filled.
Fabric Mesh – The measure of the density of the fabric weave, measured as the number of yarns per inch in both the warp and weft directions. Our standard is a 12×12 mesh.
Fabric Weight – The measure of the fabric weight in ounces per square yard or grams per square meter.
FIBC – Flexible Intermediate Bulk Container.
Fill Spout – Also called an inlet spout or top spout, used as the inlet for filling a bulk bag. It is designed to fit the customer’s filling chute during loading, and is an ideal inlet for containing dust during filling.
Filler Cord – Our standard material used in manufacturing siftproof bulk bags.
Form -Fitted Liner – A type of liner which follows the shape of the bag (from top to bottom spout), and sewn to the top seam and the bottom seam of the bag. It typically has a flange around the perimeter, which allows the top and bottom to be sewn to the bag fabric, without puncturing the liner itself.
Full Open Discharge – A type of discharge whose outlet extends from the bottom seam and follows the bag’s base dimensions. This type of discharge will sometimes come with a full flap for added strength.
Handling Label – A standard accessory sewn along the top edge of a bulk bag to provide the user with bag information, i.e. bag size, manufacturing date, SWL, SF, and bag ID, as well as a proper handling diagram. All Bagwell labels are made of water proof material and are 4”x6”.
Hem / Hemming – An operation for folding and sewing fabric edges which prevents the fraying of cut fabric. This also provides a clean finish to the bulk bag. It may be folded either towards the inside or outside of the bag.
Hose – An accessory often used on a petal closure to facilitate tying it off. This may be either polypropylene or polyvinyl chloride.
Lamination / Coating – A feature of a heat-bonded PP film laminated adhered to the fabric surface. This option assists in preventing the loss of fine particle materials due to sifting, as well as to prevent dust seeping into the bag and contaminating the contents.
Loop Height – The measurement of a lifting loop from the top seam of the bag to the end of the loop.
Lifting Loop – Also called a lifting belt or strap, it is where the tines of the forklift, or lifting device are inserted to raise or lower it. It may be made of either a stiff strap or soft strap.
Main Fabric – Fabric constituting the U-Panel or 4-Panel body of a bulk bag.
Multi-trip Bulk Bags – Bags designed in accordance with British Standards requiring a 8:1 Safety Factor, (SF). Bagwell does not offer any guarantees or recommendations for multiple uses of our bags. Since the inspection of the used bags is beyond our control, we have no way of knowing if a bag is damaged in its initial use.
Perimeter Belt or Band – A stiff or soft belt / strap sewn around the top seam for reinforcement, also called ‘Safety Band’.
Petal Cover – A piece of PP woven fabric, the same material as body fabric or main fabric, that is sewn between the spout and the petal closure to hold in / protect the spout.
Polyester – A type of polymer often used in producing threads. It is not easily recycled.
Polyethylene (PE) – A type of polymer used in producing liners. It is recyclable and used as for dust containment or as a moisture barrier for products packaged in a bulk bag.
Polypropylene (PP) – A type of polymer used in producing monofilament and multifilament yarns and threads. It is recyclable and is used as our standard fabric, belt (strap), ties, and most threads.
Remote Open Discharge – A type of outlet that has provisions for discharge of material at a distance from a bulk bag.
Safe Working Load (SWL) – SWL is the maximum permissible amount of load, (in pounds or kilograms), which a bag is designed to carry.
Safety Factor (SF) – SF is an industry standard requiring the bulk bag to handle five or six times its Safe Working Load, (SWL), normally written as a ratio, “5:1 or 6:1 SF”.
Sanitary Flap – A bag accessory that is usually paired with a remote open discharge that is used to hold in or protect the spout during filling and transport.
Seam – A sew line made by the attachment / assembly of two or more components.
Side Fabric – A fabric component of a sewn bag style of construction. This can be either 2 pieces attached to the U-Panel, or 4 pieces which form the 4-Panel bag.
Siftproof – A feature of a bulk bag that provides resistance from product sifting when the bag is filled with very fine materials. Also called ‘Anti-leakage’.
Single Trip Bag – A bulk bag designed in accordance with British Standards requiring only a 5:1 SF.
Soft Strap – A Lifting Loop or Perimeter Band made with polyester or PP multifilament yarns. Also called ‘ Nylon Strap’.
Spout Diameter – A dimension of the spout measured across the circular opening.
Spout Height / Length – Height dimension, or length, of the spout, measured from its point of attachment on the top/bottom fabric to its free end.
Stevedore Belt / Strap – A belt connecting either two adjacent lift loops or two adjacent belt sewn portions, used alternatively for lifting.
Stiff Strap -A type of lift belt made of PP yarn, allowing it to stand more upright on the filled bag.
Stitches per Inch – A sewing specification requiring “X” number of stitches per inch, (such as 4 stitches per inch).
Tie – Made of polyester or polypropylene, it is used to tie inlets and outlets.
Top Panel Fabric -The top fabric used on a bulk bag to provide the base for a top spout inlet.
Tramline – Section of a bulk bag where the lifting loop is sewn onto the body fabric. This section of fabric has twice as many warp yarns, which contribute to the strength of the bag.
Tubular Liner – A polyethylene liner with no spouts or contours, it is a straight cylinder, which may or may not have one end heat-sealed. The bottom may be tied with the bottom spout closure to hold in place. All Bagwell tubular liners have a flange around the upper section of its perimeter, which allows the top to be sewn to the bag fabric, without puncturing the liner itself.
UV Stabilized / Treatment – A feature of a bulk bag that provides protection from prolonged exposure to the sun’s degrading UV rays. A UV additive is added to the resin prior to extrusion of the yarns to provide this protection.
Warp – Yarn or strip in a fabric, oriented perpendicular to the Weft yarn during weaving. Warp is the vertically oriented.
Weft – Yarn or strip in a fabric, orientated perpendicular to the Warp yarn during weaving. Weft is horizontally oriented.
Wrapped Bottom Belt – A type of bulk bag construction where the belt of the lifting loop extends around the bottom of the bulk bag. This construction is not applicable for U-Panel or 4-Panel bulk bags.
Yarn / Strips – Extruded PP sheet, slit and stretched in annealing ovens to form part of the woven fabric for a bulk bag.