ASTM D3420
Pendulum Impact Test Method
ASTM D3420 is a widely recognized standard used to determine the pendulum impact resistance of plastic film materials. It simulates real-world impact conditions to assess a film’s toughness, particularly for applications in packaging, medical, and consumer goods.
Understanding ASTM D3420 and Its Importance
ASTM D3420 is a widely recognized standard used to determine the pendulum impact resistance of plastic film materials. It simulates real-world impact conditions to assess a film’s toughness, particularly for applications in packaging, medical, and consumer goods. This guide explains how to conduct the test using a film pendulum impact tester와 같은 Cell Instruments Model PIT-01, and provides insights into the Spencer impact test, procedures, calculations, and reporting methods.
이러한 테스트 방법은 플라스틱 필름의 인성과 품질을 평가하는 데 매우 중요하며 포장 및 식품 안전 분야를 비롯한 다양한 산업에서 널리 채택되고 있습니다.
Pendulum Impact Resistance of Plastic Film: Test Overview
This method measures the energy (in joules) required for a hemispherical pendulum head to rupture a film specimen held between circular clamps. ASTM D3420 includes two procedures:
- 절차 A: Uses a 60-mm aperture and a 25.4-mm diameter impact head.
- Procedure B (Spencer Impact Test): Uses an 89-mm aperture and a 19-mm diameter impact head.
Both procedures use a calibrated film pendulum impact tester to measure energy transferred during impact.
Film Pendulum Impact Tester Setup and Specifications
To perform ASTM D3420 effectively, use a certified pendulum impact tester that complies with the standard’s apparatus requirements. Cell Instruments’ Model PIT-01 is an ideal choice for professional labs, offering:
- Multiple energy range options (0.5 to 5.0 J)
- Analog or digital readouts
- O-ring clamp system to prevent slippage
- Adjustable pendulum weights for different film types
For optimal accuracy:
- Ensure proper leveling of the equipment.
- Zero the dial or digital scale before each test.
- Verify calibration per ASTM D1922 or the manufacturer’s guidance.
Reporting Test Results
Your report should include:
- Sample identification and test conditions
- Procedure used (A or B)
- Number of specimens tested
- Average impact energy (J)
- Average specimen thickness
- Standard deviation (if required)
Recording environmental data like temperature and humidity is crucial for reproducibility.
Conducting the Spencer Impact Test
그만큼 Spencer impact test (Procedure B) is commonly used for thicker or more durable films. Here’s a brief step-by-step:
- Condition specimens to 23 ± 2°C and 50 ± 10% RH.
- Measure thickness precisely using a micrometer (±0.00025 mm).
- Cut and mount specimens using an 89-mm aperture and O-ring clamp.
- Raise and release the pendulum from the latched position.
- Observe and record the energy absorbed to rupture the film.
- Repeat for at least five specimens and calculate the average.
Impact Energy Calculation for Procedure B:
E = (R / 100) × C
Where:
- E = energy in joules
- R = scale reading (0–100)
- C = tester capacity (e.g., 0.17, 0.34, 0.67 J, etc.)
Choosing the Best Pendulum Impact Tester
Accurately testing pendulum impact resistance of plastic film using ASTM D3420 is critical for ensuring material performance in demanding environments. By following the outlined procedures and using a reliable instrument like the 셀 인스트루먼트 PIT-01, labs and manufacturers can achieve repeatable, precise, and standards-compliant results. This helps ensure product safety, enhance packaging reliability, and maintain compliance with international standards.
Contact Us Get ASTM D3420 Testing Solution
Understanding and applying ASTM D3420 Pendulum Impact Test method ensures the reliability and safety of plastic films in real-world applications. With robust test procedures techniques, professionals can confidently evaluate film impact resistance, helping to drive product improvement and maintain high-quality standards.
에 대한 자세한 내용은 Cell Instruments PIT-01 또는 맞춤형 테스트 요구 사항에 대해 논의하려면 지금 바로 기술팀에 문의하세요!
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