ASTM D5748
Test di perforazione della sporgenza
Resistenza alla perforazione del film estensibile
ASTM D5748 è uno standard fondamentale per misurare la resistenza alla perforazione dei film plastici, in particolare nelle applicazioni che prevedono l'avvolgimento elastico e l'imballaggio protettivo. Seguendo questo metodo di prova, i produttori e i professionisti del controllo qualità possono garantire che i film plastici soddisfino gli standard di prestazione e resistano alle sfide del mondo reale.
Che cos'è l'ASTM D5748?
ASTM D5748, intitolato "Metodo di prova standard per la resistenza alla perforazione per sporgenza del film estensibile". delinea una procedura per determinare la resistenza di un film plastico alla perforazione. Questo standard è particolarmente significativo per le industrie che utilizzano i film estensibili in imballaggio, alimentare, medicale, farmaceutico, adesivi, bevande, prodotti chimici di uso quotidiano, tessile, plastica, elettronicae altro ancora.
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
Il 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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