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How does the tensile testing machine perform the tensile test of PP film

How does the tensile testing machine perform the tensile test of PP film

Polypropylene PP is light in weight, non-toxic, good in performance, and can be steam sterilized. It has a wide range of applications, including household and daily necessities, household appliances, medical syringes and containers, auto parts, transportation containers, etc. The tensile properties of PP plastics determine the quality of flexible packaging to a large extent. The following are some introductions about the tensile strength test of PP film for reference.

The tensile properties of PP plastic films are tested with a professional electronic tensile testing machine. Before the test, cut the plastic film sample into a standard size according to GB/T1040.3 and ISO527-3 "Testing of Plastic Tensile Properties", hold it firmly with the tensile fixture of the tensile testing machine, and stretch it at a certain speed until the test specimen is fracture. The tensile strength of PP film is expressed as the maximum force at break divided by the cross-sectional area of the plastic film. In addition to testing tensile strength, the electronic tensile testing machine can also test the elongation at break of PP film, that is, the ratio of the increase in the distance between the marking lines to the initial gauge length when the plastic film sample breaks. The elongation at break of PP film can be used to measure the ability of the film to stretch.

Our company's single-column series electronic tensile testing machine is designed and manufactured according to GB/T1040.3 and ISO527-3 "Determination of Plastic Tensile Properties", which is used to measure the tensile strength and elongation at break of plastic films. At the same time, in order to meet the user's testing requirements for different materials, the range of load cells of our single-column electronic tensile testing machine ranges from 100g to 500kg, and users can choose load cells with different ranges according to the force range.

When testing the tensile strength of PP plastic film, measure the thickness a and width b of the film sample, and input the corresponding thickness and width in the sample software or digital display control box. Load the specimen into the test fixture on the electronic tensile testing machine. Select the test speed from the test software and digital display control box, and click to start the test. When the sample breaks, the testing machine automatically records the maximum breaking force and automatically calculates the tensile strength. The final marking line length d of the sample is measured manually or automatically by a large deformation extensometer, and the elongation at break of the plastic film sample is calculated.

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