Medical Packaging

Products from the medical technology and pharmaceutical industries must be securely packed and also ensure product safety over a longer storage period. Packaging is manufactured from a wide variety of materials, in various geometric forms and may be equipped with special functions.

Push-out Test on Blister Packs

This device is suitable for testing the push-out force of blister contents such as pills and other medical products. Pushed-out remains fall out of the pack via the ejection channel in the compression platen. Specimen alignment is facilitated by a laser pointer which illuminates the die position above the specimen before the push-out test.

The spherical laser-pointer die can also be used for positioning specimens from other push-out tests.
The compression die is designed for  a maximum force of 30 N.

Peel Test on Peel and Blister Packs

This device is suitable for testing the seal edge of peel-off packaging by peeling off the lid or sealing material of dimensionally stable or rigid packaging media, e.g. individual blister packs for contact lenses. It possesses a support block with a holding-down device and screw clamp designed to retain the film in position. During the test, up to 90 % of the lid is pulled off. The screw clamp has a maximum opening width of 2 mm and is suitable for gripping forces up to 300 N.

Push-out Test on Blister Packs

post78img46This device is suitable for testing the push-out force of blister contents such as pills and other medical products. Pushed-out remains fall out of the pack via the ejection channel in the compression platen. Specimen alignment is facilitated by a laser pointer which illuminates the die position above the specimen before the push-out test.

The spherical laser-pointer die can also be used for positioning specimens from other push-out tests. The compression die is designed for a maximum force of 30 N.

Toolbox

The “Toolbox” contains elements which can be combined in various ways for function-testing components. A T-slot base platform attached directly to the base crosshead forms the basic workplate, on which, for example, the T-slot supplementary platform can be mounted via brackets or pivoted joints. Further combinations of the holding-down device, various fixed and movable vises, the peel device, the linear displacement unit, the clamp set and an adapter plate are possible.

Special Non-destructive Compression-test Kit for Medical Injection Vials

img48For testing the residual seal force of flanged caps, Zwick recommends a device with inserts and compression dies of various sizes. Measuring the pre-load force of the rubber stopper on an aluminium flanged cap provides an indication of the security of the vial closure. Modular design allows the various inserts to be changed quickly and easily; a protective screen is necessary for safety purposes, as glass breakage may occur during this test.

3-point Flexure Test on Snapoff Ampoules with Break Point

The universal 3-point flexure test kit allows break points and break forces on ampoules of various sizes to be tested, the ampoule geometry being accommodated via shims and a movable anvil. The kit is designed for a nominal force of 500 N and a protective screen is recommended for this test, as glass breakage may occur.

Compression Test on Cardboard Packaging

img521Compression tests have various purposes, two of which are described below.

• Determining stacking behavior: there are various procedures for this test according to standard and material. Individual or multiple packages are loaded until failure, allowing the maximum stacking height to be calculated.

• Determining inherent rigidity: this test provides information for the packaging manufacturing process,
as it is loaded with a defined force on closing (lid attachment) and must survive this procedure undamaged.

Tear Test

Standards ISO 34-1, ISO 6383-1, EN 495-2 and DIN 53363 relate to tear tests on plastic foils. The test simulates the behaviour of packaging foils when the package is opened. When opening a plastic bag, the
initial tearing strength should be approximately as much as the remaining tearing strength. If the maximum force at initial tearing is too high, the danger exists that the plastic bag will suddenly tear open
completely and the contents will spill out. The ideal behaviour is not easy to adjust because the tear resistance (as well as the tensile strength), is very direction dependent with stretched foils.

Push & Turn Test on Screw Caps

img51Test to determine the superimposed compression / torsional forces on opening and closing of childproof
containers or pharmaceutical packaging. For this a zwicki-Line tabletop testing machine of Fmax 2.5 kN and an additional torsion drive of 5 Nm torque are used. The two test axes can be used for independent or combined axial / torsion tests as required, the package being opened via a rotary movement with a superimposed axial loading. Important parameters are the opening torque required and the functioning of the childproof mechanism.

Testing Sealed-seam Strength

Seamed seal strength of seals made of flexible packaging materials is determined to DIN 55529 and packaging materials and systems for medical products for sterilization are tested to DIN EN 868ff.

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