Some basic information about the 3-point bending test on ampoules

The 3-point bending test is conducted to measure the mechanical strength of medical ampoules. This test evaluates how much stress and mechanical load ampoules can withstand without breaking or being damaged. Since medical ampoules are sensitive drug carriers, they must possess a certain level of durability. The test ensures the required quality standards for the safe transportation, storage, and usage of ampoules.

What Is the 3-Point Bending Test?

The 3-point bending test is a mechanical test in which force is applied to a material at a single central point while being supported at two outer points. The main objectives of this test are:

  • To determine the bending strength of the material

  • To measure the breaking point and mechanical resistance

  • To analyze the risk of deformation and cracking

Glass materials like ampoules are prone to cracking or breaking under mechanical stress due to their brittle structure. This test helps determine the pressure resistance of ampoules, increasing overall safety.

How Is the 3-Point Bending Test Performed on Medical Ampoules?

The test is carried out using a specialized device, and the process includes the following steps:

1. Ampoule Placement

  • The ampoule to be tested is positioned on the 3-point bending test device.

  • It is placed on two support points, and a central point is used to apply force.

2. Adjustment of Support Points

  • The ampoule is placed on two fixed support points within the device.

  • These points ensure the ampoule is evenly supported, allowing for a precise test.

3. Force Application

  • The device applies a predetermined force to the exact center of the ampoule.

  • The rate and amount of force applied can be adjusted according to testing requirements.

  • The ampoule is observed for bending, breakage, or deformation.

4. Evaluation of Test Results

  • If the ampoule breaks, the test is considered failed.

  • If the ampoule withstands the specified force, it is considered passed and its strength is recorded.

  • Breaking or cracking points are analyzed to determine the ampoule’s quality level.

Applications of the Test

The 3-point bending test is commonly used for glass and brittle materials. Besides medical ampoules, it can be applied in other areas as well:

1. Medical Ampoules

  • Ampoules used for transporting and administering drugs must meet high safety standards.

  • The test is used to measure the durability of ampoules during transport, storage, and usage.

2. Glass Materials

  • Used to determine the fracture resistance of glass materials.

  • Commonly applied to laboratory glassware, medical devices, and the packaging industry.

3. Quality Control and Production Process

  • Manufacturers use this test to ensure the safety and compliance of ampoules with international quality standards.

  • Safety tests are essential to understand how ampoules react under unexpected conditions.

Differences Between the 3-Point Bending Test and the Martindale Test

The Martindale test measures abrasion and wear resistance in textile materials, while the 3-point bending test analyzes the mechanical resistance of glass, metal, or brittle materials. These two tests are used for quality control of different material types.

  • Martindale Test: Tests abrasion resistance of fabrics.

  • 3-Point Bending Test: Measures bending and fracture resistance of ampoules and glass materials.

Evaluation of Test Results

The results of the test provide critical data to assess the ampoule’s durability. Evaluation criteria include:

  • Fracture Point: At what force does the ampoule break?

  • Mechanical Strength: How much force can the ampoule withstand?

  • Deformation: Is there any shape change under force?

  • Compliance with Production Standards: Does the ampoule meet international quality standards?

These criteria help manufacturers manage quality control processes and produce safe products.

Conclusion

The 3-point bending test is a vital procedure to determine the fracture resistance of medical ampoules. It is applied to prevent damage to ampoules during transport, storage, and use. The test results help manufacturers meet quality standards and offer safe medical products. It plays a key role in enhancing safety measures, especially in the medical and pharmaceutical sectors