ASTM D1709 Impact Resistance of Plastic Film by the Free-Falling Dart Method

    ASTM D1709 Introduction

    ASTM D1709 (Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method) measures the impact resistance of plastic film using the free-falling dart method. Impact resistance is the ability of plastic film to withstand rupture caused by the impact of a falling object. Hence, ASTM D1709 is used to assess the durability and reliability of packaging and its products. The method is designed to find the mass of the dart needed to cause failure in 50% of specimens tested under controlled conditions. Furthermore, it is a tool for quality control, specification conformance, and materials comparison. As impact strength is directly related to transportation safety and storage performance, it is widely used in packaging films such as polyethylene, polypropylene, and multilayer packaging films.

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    Get Certified ASTM D1709 Testing for Reliable Plastic Film Performance

    Packaging films need to be tough enough not to get punctured or torn during shipping and handling. Accurate impact testing thus enables the manufacturer to select appropriate film structures for industrial use. Also, certified laboratory testing helps ensure product uniformity, thus reducing field failures. The correct evaluation also facilitates specification adherence and customer confidence.

    Scope of ASTM D1709 Test Standard

    • Identifies the source of energy that leads to the failure of plastic film during dart impact.
    • Determines the 50% specimen failure mass of the dart.
    • Used in packaging and plastic films for industry.

    Equipment and Sample Preparation

    Sample and Specimen DetailPlastic film materials, such as polyethylene and polypropylene, are suitable for testing. Specimens must maintain uniform thickness because results are comparable only within ±25% thickness variation.
    Dart Impact TesterReleases hemispherical darts from specified heights under controlled testing conditions.
    Clamping DeviceHolds film specimens securely during impact testing to prevent movement.

    Use of ASTM D1709

    • Tests the plastic film’s resistance to punctures.
    • Helps with packaging product development initiatives.
    • Assists with comparing film fabrication techniques.
    • Improves product reliability during transport.

    What is the difference between Test Method A and Test Method B?

    Test Method A is conducted at a lower drop height and with a smaller hemispherical dart; therefore, it is suitable for films with lower impact resistance. Method B is used for stronger films that are impacted with a higher energy. The methods both measure the dart’s velocity, which causes 50% of the specimens to fail when tested under specific conditions.

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    Common Challenges and Troubleshooting

    The results obtained in ASTM D1709 are very sensitive to film quality. Thus, failure characteristics can differ if the thickness is nonuniform or if there are die marks, contaminants, or fabrication defects. Further, if specimens are improperly clamped, they can be impacted incorrectly. Technicians minimize these issues by making standard specimens and keeping calibrated equipment.

    ASTM D1709 Testing Technique, Process, and Data Collection

    The first step in the testing process is to prepare the specimen and check its thickness. Technicians then place the specimen securely in the impact tester. Then, they release the dart from the required height and observe specimen failure. The staircase method alters the dart mass with each dart throw based on the specimen’s performance. Specimens can also be tested in sets of 10 with a set of constant dart masses or a set of constant dart masses and variable specimen mass. Lastly, failure data is recorded, and the impact resistance level is calculated based on 50% specimen failure.

    Testing Procedure and Requirements

    ASTM D1709 is a test that measures the impact resistance of plastic film in a controlled falling dart test. The first step in the technique is to securely position the film specimen in the test apparatus. Then, technicians throw a hemispherical “dart” from a certain height. Then they record whether it breaks the film or not. The staircase method consists of adding or removing darts after each throw.

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    Test Method AUses a 38.10 ± 0.13 mm hemispherical dart head dropped from 0.66 ± 0.01 m. Applicable for impact masses from about 50 g to 6 kg.
    Test Method BUses a 50.80 ± 0.13 mm hemispherical dart head dropped from 1.52 ± 0.03 m. Applicable for masses from about 0.3 kg to 6 kg.
    Testing TechniqueUses staircase or alternative group testing methods to determine 50% specimen failure.
    The image shows a free-falling dart impact tester that measures the impact resistance of plastic films, laminates, and packaging materials as described in ASTM D1709.
    ASTM D1709 Free-Falling Dart Impact Tester

    Analysis Results and Interpretation

    ASTM D1709 is a test method that relies on the dart mass required to cause failure in 50% of specimens tested. Normally, results are reported in grams (g) or kilograms (kg). The higher the impact value is, the greater the puncture resistance and the more durable the packaging will be. Technicians should, however, compare only films with similar thickness ranges and fabrication conditions.

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    Link To ASTM D1709 Standard

    FAQ

    Where can I get the astm d1709 tested?
    You can share your astm d1709 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d1709 test to various testing techniques.
    Please contact us for a detailed quote for your astm d1709 testing needs. Cost incurred to carry out different astm d1709 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
    The required number of samples or specimens should comply with the procedure given in the astm d1709 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
    MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
    The turnaround time for astm d1709 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
    Suyog Kamble
    About Author
    Suyog Kamble
    Suyog Kamble is an Operations Associate at MaTestLab Inc. and holds a postgraduate degree in Organic Chemistry.
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