Plastic composite film bags for packaging usually refer to composite films or packaging bags composed of two or more materials, generally made of plastic, paper, aluminum foil, and other materials by bonding and heat sealing methods. It has good mechanical properties such as tear resistance, needle puncture resistance, fatigue resistance, impact resistance, friction resistance, anti-aging performance, etc., and is widely used in the packaging industry.

During the storage, transportation, and circulation of packaging, it is inevitable to be punctured and impacted by external objects such as sharp corners of other packaging bags. Or for the packaging of steamed meat products, poultry meat products with strong puncture ability for bones and packaging materials are included in the contents.

If the anti puncture performance of the packaging bag is poor, under the puncture of the above-mentioned objects, it is easy to form small and inconspicuous holes on the surface of the packaging, causing air and liquid leakage, and even directly forming a large area of broken bags. Therefore, it is necessary to test the puncture strength of the composite film to reduce the impact of external factors on the packaging bag, which may cause deterioration or leakage of things.

Therefore, the puncture resistance of plastic film or composite film is an important indicator of packaging materials. Many food packaging material manufacturers and food production enterprises make the puncture strength test of packaging bags one of the mandatory inspection items. The test method is clearly specified in GB/T 10004-2008 Plastic Composite Film, Bag Dry Composite, and Extrusion Composite for Packaging.

The principle of puncture strength testing is to fix the sample on the fixture, install the puncture needle on the moving chuck to puncture the sample, and test and record the force value changes during the puncture process through the force sensor and displacement sensor located on the moving chuck.

The puncture strength test involves installing a test piece with a diameter of 100mm on a sample film fixing clamp ring, and then using a steel needle with a diameter of 1.0mm and a spherical tip radius of 0.5mm to puncture at a speed of (50 ± 5) mm/min. The number of test pieces is 5 or more, and the arithmetic mean is taken. The sample should have uniform thickness, without wrinkles, creases, stains, or other obvious defects.

Introduction to Composite Membrane Puncture Strength Testing Instrument:

Suitable for performance testing such as stretching, peeling, deformation, tearing, heat sealing, bonding, and puncture force of plastic films, adhesives, adhesive tapes, stickers, medical patches, release papers, protective films, combination covers, backplate materials, non-woven fabrics, rubber, paper fibers, and other products. FX-303 is an electronic tensile testing machine used to test the mechanical properties such as tensile properties of various flexible packaging materials. It has multiple independent testing programs, various specifications of force sensors, and infinite speed control test speed selection, which can meet various testing conditions of users; Intelligent operating software not only facilitates user control of devices, but also provides various practical functions such as data analysis and comparison.

Technical Indicators:

Specification: 50-1000N (optional)

Accuracy: Level 0.5

Test speed: 1-500mm/min

Sample quantity: 1 piece

Test stroke: 750mm

Dimensions: 400 × 500 × 1270mm

Equipment power supply: 220VAC 50Hz

Instrument weight: 65kg

Instrument casing: standard steel with baking paint treatment and aluminum profiles

Introduction to testing software:

This software can independently control and conveniently display test data, curves, speeds, material specifications, and other functions. It can also be combined with a printer to print test results and has an automatic return to the origin function. This software also has a (upper computer) connection function: it can connect to a personal computer through a USB interface and R232 serial port, perform bidirectional data transmission, directly control the machine with computer software, perform data analysis, and draw curve graphs.

Reference standards:

GBT10004 (Plastic Composite Film for Packaging)

GB/T2790 (Adhesive 180 ° Peel Strength Test)

GB/T2791 (Adhesive T peel strength test)

GB2792 (Determination of 180 ° Peel Strength of Pressure Sensitive Adhesive Tape)

GB4850 (Low speed unwinding strength test)

GB7754 (Shear Strength Test)

GB8808 (Composite Film Peel Strength Test)

ZBY28004 (Determination of Heat Seal Strength)

GB13022 (Thin Film Tensile Test)

GB7753 (Tensile Test for Pressure Sensitive Adhesive Tape), etc