Multiwall Bag Glossary - A

  1. AbrasionThe rubbing or wearing away of a sheet of packaging material through contact with some other material. (also see scuffing, chafing).
  2. AbsorbencyPertains to the amount of liquid taken up by paper, or the rate of uptake or time required for a paper to take up a given amount of liquid. Rate or time of absorbency is more commonly used.
  3. AcidA chemical that yields hydrogen ions in water. It has a corrosive action on many materials. The concentration of hydrogen ions is stated in terms of pH value. Acids are less than pH 7.0.
  4. Acid-Resistant PaperPaper which has been treated to resist the actions of acids or acid fumes.
  5. AdhesionThe state of sticking together or bonding two or more materials.
  6. Adhesive, hot meltAn adhesive that is solid at room temperature, liquefied by heat, applied in molten state and forms a bond by cooling and solidifying.
  7. Adhesive, palletizingAn adhesive used to unitize loads of bags or cases on a pallet providing low peel strength with high shear strength to prevent sliding.
  8. AdhesivesBonding agents used in the manufacture of shipping sacks. Most common adhesives are the waterproof-types made from starch or dextrines. Others are polyvinyl acetate resin emulsions, latex and hot melt.
  9. AIDUnited States Agency for International Development
  10. Alkali A chemical that yields hydroxyl ions in water. It has a corrosive action on many materials. The concentration of hydroxyl ions is stated in terms of pH value. Alkalis are higher than pH 7.0.
  11. Alkali-Resistant PaperA paper used to wrap materials that have an alkaline reaction, such as soaps or alkaline adhesives. Paper which does not show appreciable discoloration when wet with one percent sodium hydroxide (caustic soda) is considered alkali-resistant.
  12. All Creped Multiwall SackA sack in which all walls or paper plies are made from creped paper.
  13. Aluminum Foil CoatingsAluminum foil coated with polyethylene or other materials.
  14. Aluminum Foil LaminationsA combination of thin aluminum foil with a paper backing used as a barrier. A typical foil lamination is kraft backing with aluminum foil laminated to the kraft paper by means of an adhesive or extruded polyethylene.
  15. Angle of SlideThe height at which a weighted sample placed on another sample of the same material will begin to move or slide down an incline as expressed in degrees of an angle.
  16. Anti-Slip PaperA sheet of paper chemically or mechanically altered to increase the coefficient of friction (COF).
  17. Apparent DensityThe weight per unit of volume of the sheet of paper calculated by dividing the basis weight (500 sheets 24" x 36") by the caliper (in mils) and multiplying that figure by the factor 0.0000643
  18. Automatic SackAn alternative name for a self-opening sack (SOS).
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