How to test the tensile strength of plastic stretch film?

The tensile strength test of the plastic stretch film is performed on the tensile testing machine, using the standard test sample shape according to the temperature, humidity and tensile speed specified in the standard, and fixing the sample on the testing machine. With the longitudinal and axial tensile load, the sample is stretched and deformed until it breaks. The maximum tensile stress that the sample bears is the tensile strength of the sample.



Good viscosity makes the packaging film layer and layer on the outside of the goods stick together to make the goods firm. There are two main ways to obtain the viscosity: one is to add PIB or its masterbatch to the polymer; the other is to blend VLDPE . PIB is a translucent viscous liquid, and direct addition requires special equipment or

Generally, PIB masterbatch is used for equipment transformation.

Related standards for tensile strength testing
Tensile strength refers to the stress at which the material produces the maximum uniform plastic deformation.
(1) In a tensile test, the maximum tensile stress that the sample has received until it breaks is the tensile strength, and the result is expressed in MPa. Some mistakenly call it tensile strength, tensile strength, etc.
(2) When using the instrument to test the tensile strength of the sample, the tensile breaking stress, tensile yield stress, elongation at break and other data can be obtained together.
(3) Calculation of tensile strength: 　σt = p /( b×d) 　 where σt is the tensile strength (MPa); p is the maximum load (N); b is the sample width (mm); d is the test Sample thickness (mm).