ASTM D5748
Protrusion Test de perforation
Résistance à la perforation du film étirable
L'ASTM D5748 est une norme essentielle pour mesurer la résistance à la perforation des films plastiques, en particulier dans les applications impliquant le film étirable et l'emballage de protection. En suivant cette méthode d'essai, les fabricants et les professionnels du contrôle de la qualité peuvent s'assurer que les films plastiques répondent aux normes de performance et résistent aux défis du monde réel.
Qu'est-ce que l'ASTM D5748 ?
ASTM D5748, intitulé "Méthode d'essai normalisée pour la résistance à la perforation par protubérance des films étirables,". décrit une procédure permettant de déterminer la résistance d'un film plastique à la perforation. Cette norme est particulièrement importante pour les industries qui utilisent des films étirables dans les domaines suivants emballage, alimentaire, médical, pharmaceutique, adhésifs, boissons, produits chimiques quotidiens, textiles, plastiques, électroniqueet bien d'autres choses encore.
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
Le 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.
- Exécution des tests:
- 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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