ASTM F1921 Hot Seal Strength

Hot Seal Strength (Hot Tack) evaluation of Thermoplastic Polymers and Blends Comprising the Sealing Surfaces of Flexible Webs is done by ASTM F1921. Seal strength, the maximum peak force, threshold sealing temperature, and hot tack temperature range are determined for a thermoplastic polymeric material.... Read More

  • Average 30% Cost
    Savings

  • 100% Confidentiality
    Guarantee

  • Free, No-obligation
    Consultation

  • 100% Customer
    Satisfaction

    TRUSTED BY ENGINEERS FROM

    Scope:

    ASTM F1921 test used to measure the strength of heat seals formed between thermoplastic surfaces of flexible webs. The seal is quickly measured after it has been created and before it cools to room temperature. This characteristic is significant because such situations often occur on vertical form-fill-seal packaging. The contents are released into the bag instantly after the horizontal seal bars have been opened in the procedure. The content can be heavy and also the hot seal has to deal with high loads, so a high hot tack force is required to overcome such obstacles.

    Test Procedure:

    For ASTM F1921 test, the film sample is used which is fixed in the upper sample grip. The sample is linked to a load cell and the lower sample grip is linked to a peeling actuator. Then, the film sample is placed between the sealing bars. This is achieved by a sample insertion mechanism. Under specified conditions of temperature, pressure, and contact time, a seal is prepared. At the final sealing time, after a predetermined delay time, the peeling actuator proceeds down with a predetermined speed and peels the hot seal completely apart. Hot tack force is used to determine the maximum force required to break or peel the seal. 

    Sample size:

    Generally, a rectangular sample is used.  The sample width can be either 25 mm, 15 mm, or 1.00 inch.  The length of the sample must be between 250 and 350 mm.

    Data:

    Seal strength; the maximum peak force.

    Threshold sealing temperature; the minimum temperature at which the required hot tack strength is reached.

    Hot tack temperature range; the temperature range in which the required hot tack strength is acquired.Failure Mode (Similar to ASTM F88)

    Conclusion:

    Hence, ASTM F1921 is a standard test method used to evaluate the hot seal strength of packaging material. 

    OUR SERVICES

    Core Materials Testing Services

    Metrology

    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      ddd Just share your testing requirements and leave the rest on us!
      • Quick Turnaround and Hasslefree process
      • Confidentiality Guarantee
      • Free, No-obligation Consultation
      • 100% Customer Satisfaction