Glossary

Abrasion - The wearing away of a bag's surface due to contact with another surface, such as during transport or handling. This may also be known as scuffing or chafing.
Absorbency - Refers to the amount of liquid a paper can take up, as well as the speed at which it absorbs that liquid. It's a crucial property for bags meant to handle moisture-sensitive products.
Acid - A substance that releases hydrogen ions in water and can cause corrosion. Acidity is measured by a pH level below 7.0, and our packaging materials are selected to resist such effects.
Acid-Resistant Paper - Specially treated paper designed to withstand exposure to acidic environments, maintaining the integrity of the contents.
Adhesion - The bonding strength between different layers or materials in a bag, ensuring they remain securely attached during use.
Adhesives - Materials used to bond different parts of a bag together, commonly made from waterproof substances like starch or latex to provide durability.
AID - Stands for United States Agency for International Development, often involved in packaging regulations and standards.
Alkali - A substance that releases hydroxyl ions in water and can have a corrosive effect. Our products include paper that can resist exposure to alkaline environments, with pH values above 7.0.
Alkali-Resistant Paper - Paper that withstands exposure to alkaline substances, like soaps or adhesives, without significant damage or discoloration.
All Creped Multiwall Sack - A type of bag where all layers are made from creped paper, adding flexibility and strength.
Aluminum Foil Coatings - Aluminum foil coated with materials like polyethylene to enhance moisture resistance and durability.
Aluminum Foil Laminations - A combination of aluminum foil with a paper backing, creating a strong barrier for packaging. The foil is bonded to kraft paper using adhesives or polyethylene.
Angle of Slide - The point at which a weighted sample will begin to slide down an incline, indicating the material's friction level.
Anti-Skid - A special coating applied to the outer surface of a bag to prevent slipping or sliding, crucial for safe stacking and transport.
Anti-Slip Paper - Paper treated chemically or mechanically to enhance its friction properties, preventing slippage during transport or storage.
Apparent Density - The weight per unit volume of a paper sheet, calculated by dividing the basis weight by thickness and multiplying by a constant factor.
Automatic Sack - Another term for a self-opening sack (SOS), designed for convenience during filling.
Bag - Typically a smaller package, often under 20 pounds in weight, used for consumer products and easy handling.
Bag Paper - The paper chosen specifically for bag production, selected based on the contents and expected performance requirements.
Bale - A bundle of empty bags, usually tied or wrapped, prepared for shipment from our production facility.
Baler Bag - A large, durable sack used for carrying smaller bags or unitizing products during storage and transport.
Bar Pasting - A method of adhering layers in a sack using bars or lines of adhesive instead of spot applications.
Basis Weight - The weight of 500 sheets of paper, measured in pounds, in the standard sheet size of that paper. It helps indicate the paper’s durability.
Beater Drying - A technique where colorants are added to the paper pulp before it's formed, ensuring even color distribution.
Beater Sack - A sack made from repulpable kraft or bleached kraft, with all components easily recyclable.
Bellows - Also known as gussets, which are folds added to the sides of bags for extra flexibility and capacity.
Bleaching - The process of whitening pulp using chemicals, removing non-cellulose materials for a cleaner, whiter appearance.
Bleed - The extra printed area on a bag extending to the edge, allowing for tolerance during the manufacturing process.
Blend - A plastic film composed of various pre-mixed components before extrusion, differing from co-extruded films.
Blocking - The tendency of plastic-coated papers to stick together due to static or pressure during storage or handling.
Bulk Density - The weight of a specific volume of material, often expressed in pounds per cubic foot or kilograms per cubic meter. This affects how much product can be packed into each bag.
Burst Strength - The ability of paper to resist breaking or tearing when under pressure, measured in pounds per square inch. It's essential for bags handling heavy or rough materials.
Cubic Capacity - The volume of material a bag can hold, which is best determined by filling trials to ensure accuracy, accounting for air trapped within the product.
Creased Tops - A scored line near the top of a bag, aiding in forming a clean and tight closure when sealed.
Ear - The pointed extensions at the corners of bags that form when they are filled and sealed, aiding in stability during stacking.
Face - The front side of the bag, opposite the side with the longitudinal seam, often where logos or key information are printed.
Flat Tube - A tube-shaped bag that has no gussets, offering a more compact design for specific packaging needs.
Freeboard - The space between the product's top surface and the top of the bag, ensuring secure sealing and easy handling.
High Performance Extensible Paper - A special type of paper that is stretchable and smooth, offering high energy absorption. Ideal for products requiring strong and flexible packaging.
Kraft Paper - A durable type of paper made from wood pulp using a modified sulphate process. Available in brown or lighter shades, kraft paper is known for its strength and versatility in weights ranging from 25 to 80 lbs.
Liner - A polyethylene film layer inserted within the paper layers of a bag, providing a barrier against moisture or contamination.
Patch - A reinforcement layer added to the top or bottom of a valve bag, preventing product leakage and enhancing the bag's strength.
Perforations - Small holes punched into a bag’s walls to let air escape rapidly during the filling process, preventing bag deformation.
Ply - A single layer of material within a bag. Each ply adds to the bag's overall strength and protection, with multiple plies being common in industrial packaging.
Polyethylene - A widely-used thermoplastic material composed of ethylene polymers, known for its flexibility, moisture resistance, and durability.
Porosity - A characteristic of paper that allows air to pass through it, important for certain products that need to breathe or ventilate.
Protected Glue Seam - An internal fold in the bag's longitudinal seam, designed to reduce wear between the glue seam and the bag’s contents.
PVSE - Stands for Pasted Valve Stepped End, a specific type of valve construction that enhances durability.
Reduced Valve - A smaller valve opening that ensures precise filling and minimizes product loss.
Sleeve, Double Trap - Offset pieces of paper and plastic film applied in the valve opening to prevent product leakage.
Sleeve, Poly-lock - A polyethylene film insert added to the valve opening for enhanced product retention and security.
Sleeve, Tube - A piece of paper or plastic film added in the valve opening to prevent leakage and support secure sealing.
Sleeve, Tuck-in - An extension of the valve sleeve that can be manually folded and tucked in after filling, offering additional sealing protection.
Slide Angle - The angle at which a paper begins to slide when it comes into contact with another sheet, crucial for handling and stacking stability.
Stepped-End Tube - A tube where each layer is individually cut in a stepped pattern, allowing for better adhesion and sealing.
Trapping - A printing method involving overlapping colors to ensure alignment during production, avoiding gaps or misprints. Tubing - The process of forming continuous paper webs into a cylindrical shape on a bag-making machine, then cutting them to the desired length.
Valve - An opening folded into the corner of a bag through which it can be filled, typically sealed after filling to maintain product integrity.
Valve Insert - A reinforcing material placed inside the valve opening to increase strength and prevent leaks.
Valve Position - The location of the valve when viewing the front of the bag, with standard positions like upper left hand (ULH) or lower right hand (LRH) depending on the bag's design.
Valve Size - The internal dimension of the valve’s lay-flat opening, ensuring compatibility with filling equipment.