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Filament tape

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Title: Filament tape  
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Filament tape

Filament tape or strapping tape is a pressure-sensitive tape used for several packaging functions such as closing corrugated fiberboard boxes, reinforcing packages, bundling items, pallet unitizing, etc. It consists of a pressure-sensitive adhesive coated onto a backing material which is usually a polypropylene or polyester film and fiberglass filaments embedded to add high tensile strength. It was invented in 1946 by Cyrus W. Bemmels, a scientist working for Johnson and Johnson.

A variety of grades of filament tape are available. Some have as much as 600 pounds of tensile strength per inch of width. Different types and grades of adhesive are also available.

Most often, the tape is 12 mm (approx. 1/2 inch) to 24 mm (approx. 1 inch) wide, but it is also used in other widths.

A variety of strengths, calipers, and adhesive formulations are available.

Uses

The tape is most often used as a closure for corrugated boxes such as a full overlap box, five panel folder, full telescope box. "L" shaped clips or strips are applied over the overlapping flap, extending 50 - 75 mm (2 - 3 inches) onto the box panels.

Heavy loads or weak box construction may also be aided by the application of strips or bands of filament tape to the box.

Application

The tape can be applied manually with a stationary dispenser but is more often applied with a hand held tape dispenser: this allows the user to more efficiently place the tape on the box, cut it off, and rub it down.

Automated machinery for application of tape to high speed lines is also common.

Related products

Some PSA tapes are available which have a highly oriented polypropylene backing with high strength in the long (machine) direction. Some of these have shaped filaments which help resist tearing across the tape. These tapes are sometimes used in a similar manner as filament reinforced tapes.

Some filament tapes (or strapping tapes) are sometimes used similarly to strapping.

See also

References

  • ASTM D3330 Standard Specification for Pressure Sensitive Tape for Packaging, Filament Reinforced
  • ASTM D1974 Standard Practice for Methods of Closing, Sealing and Reinforcing Fiberboard Boxes.
  • ASTM D5168 Standard Practice for Fabrication and Closure of Tripplewall Corrugated Containers
  • Brody, A. L., and Marsh, K, S., "Encyclopedia of Packaging Technology", John Wiley & Sons, 1997, ISBN 0-471-06397-5
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