FILLPROOFNESS POLYESTER FILL
METHOD NUMBER: IDFL 20-1
International Rotating Box Downproof Tester
Fillproof Test Pillow
WHY TEST FOR THIS?
Fabric makes up the bulk of a filled garment or bedding product. Ensuring that
the fabric can effectively contain the polyester filling is essential to customer
satisfaction.
HOW IS THIS TEST PERFORMED?
A small test pillow is made from the sample fabric, filled with polyester and
sewn closed. It is then placed in the test apparatus which is intended to
consistently simulate use of the finished product. At the conclusion of the test
cycle the test pillow and apparatus are closely examined. All material that
escaped is collected and a corresponding rating is assigned.
WHAT DO THE RESULTS MEAN?
Generally in a polyester fillproof test only a rating is reported since it is often
impossible to quantify the extremely small filaments that penetrate the fabric.
HOW CAN I IMPROVE THE RESULTS?
A fabric can be made more fillproof by several means:
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Increase the thread count
Avoid patterns woven into the fabric (jacquard, damask)
Use treatments/finishes (ciré, DWR, calendaring, etc.)
Use high quality materials and techniques
Testing, Inspection and Research Excellence
IDFL LABORATORY AND INSTITUTE
Certified Laboratory: IDFB • EDFA Associations: AATCC • ADFC • ASTM • CFDIA • DAC • EDFA • IABFLO • TFEA
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