Heat Seal Strength Test Method The heat seal strength test method is a commonly used quality inspection method to evaluate the performance and reliability of heat seal materials. This article will introduce the principles, procedures, and common testing instruments and techniques of heat seal strength testing. By reading these contents, you can understand the importance and application areas of heat seal strength testing. Heat Seal Strength Test Method The heat seal strength refers to the strength of the seal within the flexible barrier materials and can be used to determine consistency within the seal, as well as evaluation of the opening force of the package system. Usually, the heat seal strength depends on those heat seal parameters including sealing temperature, sealing pressure, and dwell time.

The determination of suitable sealing parameters is significant to the performance and quality of the package. To be specific, if the sealing parameters are too low, due to insufficient seal strength, the sealing layer may not be able to combine together tightly and as a result, the sealing edges may break or leak. On the other hand, if the sealing parameters are too high, the sealing area may shrink and as a result, the package may break from the root. Therefore, it is quite important for the manufacturers of flexible plastic medical packaging to control the seal strength by selecting suitable...

If the sample is broken in the fixture, the sample is invalid, and another sample is taken to redo. FIG. 1 Tail Holding Methods Test results, the material is the arithmetic average of 5 samples in the longitudinal and transverse directions, and the composite bag uses the average of 10 samples in different heat-sealing positions as the heat-sealing strength of the sample, and the unit is expressed in N/15mm.