ASTM D5748
Zkouška prorážením
Odolnost strečové fólie proti propíchnutí
Norma ASTM D5748 je zásadní normou pro měření odolnosti plastových fólií proti propíchnutí, zejména v aplikacích zahrnujících stretch fólie a ochranné obaly. Dodržováním této zkušební metody mohou výrobci a odborníci na kontrolu kvality zajistit, aby plastové fólie splňovaly výkonnostní normy a odolávaly reálným výzvám.
Co je ASTM D5748?
ASTM D5748, s názvem "Standardní zkušební metoda pro odolnost strečové fólie proti proražení". popisuje postup pro stanovení odolnosti plastové fólie proti propíchnutí. Tato norma je důležitá zejména pro průmyslová odvětví, která používají stretch fólie při obaly, potraviny, lékařské a farmaceutické výrobky, lepidla, nápoje, chemikálie pro každodenní použití, textil, plasty, elektronika.a další.
Protrusion Puncture and Puncture Resistance of Plastic Films
Puncture resistance reflects the energy-absorbing ability of plastic films when faced with sharp objects or protrusions. In many industrial applications, plastic films must protect contents during handling and storage. ASTM D5748 ensures films provide reliable puncture protection, which is critical for maintaining product integrity.
For instance, during transportation or warehousing, films may face biaxial stresses similar to those recreated in this test. Although exact field conditions may vary, it provides a consistent and comparable framework for evaluating puncture resistance.
Equipment and Setup
To perform the ASTM D5748 test, specialized equipment is required. Puncturetest.com’s Protrusion Puncture Tester is highly recommended for its precision, reliability, and compliance with ASTM D5748 requirements. This tester ensures accurate measurement of puncture energy and penetration distance.
Key Steps for Setup and Testing:
- Install the probe apparatus and center it over the specimen clamping fixture.
- Calibrate the equipment according to the manufacturer’s instructions to ensure accurate results.
- Prepare at least five specimens for each sample, ensuring uniform thickness by measuring the caliper at the specimen’s center.
Detailed Test Procedure in ASTM D5748
Na stránkách ASTM D5748 test follows a series of precise steps:
- Calibrate Equipment: Follow the equipment’s manual to ensure accurate load range settings.
- Prepare Specimens: Use a template and cutter to prepare at least five samples, recording thickness measurements.
- Clamp and Align: Position the specimen in the holder, adjusting the probe to be as close as possible without touching.
- Test Execution:
- Set the crosshead speed of the universal tester to 10 in./min (250 mm/min).
- Begin testing, ensuring the probe passes completely through the film.
- Discard tests with holes forming outside the probe’s impact point.
- Data Recording: Capture peak force, maximum force, energy to break, and probe penetration distance using integrated software or chart recorders.
- Repeat for All Specimens: Ensure repeatability and consistency by testing all samples in the same manner.
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