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How Specimen Evenness Affects Packaging Tests and Why Reference Films Matter
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How Specimen Evenness Affects Packaging Tests and Why Reference Films Matter - 1

Labthink Instruments Co., Ltd. info@labthink.com +86-531-85068566 Control Specimen Evenness to Ensure Accurate Results of Flexible Packaging Material Tests Accurate testing is vital for ensuring the quality and performance of flexible packaging materials. However, a hidden factor can significantly skew test results: specimen evenness. This article explores how variations in specimen evenness can impact various tests and how reference films can be used to mitigate this issue. The Importance of Specimen Evenness Flexible packaging films are subjected to a battery of tests to assess their suitability for specific applications. These tests measure properties like tensile strength, elongation, impact resistance, bond strength, and permeability (gas, water vapor, organic gas). While the testing instruments themselves play a crucial role, the evenness of the film specimens used is equally important. Unevenness refers to variations in thickness, presence of wrinkles, indentations, pinholes, or even invisible lamination defects. These inconsistencies can significantly affect the test results. Imagine stretching a film specimen with a weak spot – it will break prematurely, providing an inaccurate measure of its overall tensile strength.

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How Specimen Evenness Affects Packaging Tests and Why Reference Films Matter - 2

Labthink Instruments Co., Ltd. info@labthink.com +86-531-85068566 Unevenness leads to higher data discreteness, a wider range of test results. This can be misinterpreted as instrument error, masking the true culprit: uneven specimens. Consequently, comparisons between materials, instruments, or laboratories become unreliable. How Unevenness Affects Different Tests Unevenness can impact various tests used for flexible packaging materials:  Tensile Strength and Elongation: Uneven areas can break prematurely, leading to underestimates of the film's true strength and stretch capabilities. ...

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How Specimen Evenness Affects Packaging Tests and Why Reference Films Matter - 3

Labthink Instruments Co., Ltd. info@labthink.com +86-531-85068566 C630H Heat Seal Tester can be used to determine the optimal heat sealing parameters including dwell time, sealing pressure and sealing temperature for plastic films, flexible composite films, plastic coated paper and other heatsealable films. Permeability Tests: Variations in thickness can affect the rate of gas, water vapor, or organic gas transmission. C403H Oxygen /Water Vapor Transmission Rate Test System is based on the testing principle of Coulometric oxygen sensor and infrared water vapor sensor. It is suitable for...

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How Specimen Evenness Affects Packaging Tests and Why Reference Films Matter - 4

Labthink Instruments Co., Ltd. info@labthink.com +86-531-85068566 Reference films are specially designed films with superior evenness and stability. Their element composition and structure are often simpler, allowing for one or more properties to achieve a tightly controlled range of values. This consistent evenness makes them ideal for: Instrument Calibration (Permeability Tests): Calibrating permeability instruments involves factors like pressure, temperature, and humidity. Reference films with well-defined permeability characteristics can be used to verify the instrument's accuracy...

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