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Automated Friction "Pinch" testing of Hydrophilic Coatings on Catheters

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These days angioplasty, is an endovascular procedure to widen narrowed or obstructed arteries or veins, is almost considered a routine procedure, yet the technology behind it is exacting and subject to rigorous quality and performance control. In this procedure a n empty, collapsed balloon, known as a balloon catheter, is passed over a wire into the narrowed locations and then inflated to a fixed size. The balloon forces expansion of the narrowing within the artery or vein and the surrounding muscular wall, opening up the blood vessel for improved flow, and the balloon is then deflated and withdrawn. A stent may, or may not, be inserted at the time of ballooning to ensure the vessel remains open. Not only are the stents themselves, and the wire used in their construction, tested for tensile strength, compressive strength and stiffness properties, so too are the balloon catheters used to deliver the stent into the body. In recent times, more attention is being paid to...
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Mechanical Testing of Composites

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As the demands for light-weight composite structures for aerospace, ground transportation, and environmentally sustainable energy systems develop, so do the mechanical testing requirements for composite materials, components and structures. Anisotropic and inhomogeneous composite materials, for use in demanding structural applications, require a wide range of mechanical tests. Determination of properties requires tension, compression and shear tests. Qualification and materials development requires other test types to explore more complex properties, such as open hole tension/compression (OHT/OFC), inter-laminar fracture toughness, compression after impact (CAI) and fatigue.   Tests need to be conducted over a range of temperatures on materials that may have been conditioned in a variety of environmental conditions, such as high humidity and immersion in fluids. Composite tests have been standardized by a number of organizations. The main international composite testin...
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Tube Squeeze Force Test

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Interesting application; testing and verifying the force required to squeeze a material, in this case an adhesive, from its tube. The accessory applies a squeezing force using a roller set as the tensile frame applies the squeezing motion by pulling the tube up through the rollers. The speed of the pull/squeeze can be accurately defined as required. The output is a graphical representation of the test showing force against movement and time. Forces of interest are automatically captured and reported be it the start force, mid point or just before the tube empties. Through testing like this, manufacturers of tube-based products can prove out the quality of their packaging and ease of use.  #InterestingTech #MaterialsScience  
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