Bulletproof fabrics are usually used as create jackets to protect the user from being shot. These varied write according degree of expected risks and required levels protection. Different types materials fibers could be for achieving many properties different protections. The type number were affected on current market is looking reduce weight thickness these fabrics, in addition low cost. In a...

Introduction Long-term success of TKA depends on several factors including wear, fracture resistance, and oxidative stability. A recent evaluation has shown that when accelerated aging protocols are extended out to 40 days, an antioxidant-stabilized UHMWPE outperformed non-irradiated GUR 1020, by remarkably retaining its mechanical properties, while the reputed oxidatively stable material exper...

High density polyethylene (HDPE) / ultra high molecular weight (UHMWPE) blend is expected as an all-polyolefin recycle material that can achieve both mechanical properties and a continuous melt-mixing process. In order to improve the of polymer blends, optimal mixing required good dispersibility low degradation. this study, effect conditions on dispersion degradation behavior HDPE/UHMWPE blends...

Ultrahigh molecular weight polyethylene (UHMWPE) has remained the primary polymer used in hip, knee and shoulder replacements for over 50 years. Recent case studies have demonstrated that catastrophic fatigue fracture of the polymer can severely limit device lifetime and are often associated with stress concentration (notches) integrated into the design. This study evaluates the influence of no...

The effects of polytetrafluoroethylene (PTFE), graphite, ultrahigh molecular weight polyethylene (UHMWPE), and their compounds on mechanical and tribological properties of glass-fiber-reinforced polyamide 6 (PA6/GF) were studied. The polymeric materials were blended using twin-screw extruder and subsequently injection molded for test samples. Mechanical properties were investigated in terms of ...

Three different models, a modified Chandler loop, roller pump, and a new ball valve model (Hemobile), were compared with regard to intrinsic damage of blood components and activation of platelets. The Hemobile was used for testing of polymer tubes. High flow was not possible with the Chandler loop. The roller pump and the Hemobile could be adjusted to high flow, but he pump induced hemolysis. P...

INTRODUCTION: Both posterior stabilized (PS) and cruciate retaining (CR) total knee replacement systems have demonstrated high rates of survivorship, high clinical knee scores and high patient satisfaction scores for decades. However, CR total knees sometimes exhibit more varied kinematics and a smaller range of motion than similar PS knees. Many factors can cause this, but one important factor...

Ultra High Molecular Weight Polyethylene (UHMWPE) is a polymeric material employed in critical biomedical applications. Knowledge of its mechanical behavior is essential in order to obtain accurate prediction of stresses and deformations in real components, in particular when cyclic loading is considered. In the present research the effects of alternating and pulsating cyclic strain on the mech...

Tensile and impact test samples of ultra-high molecular weight polyethylene (UHMWPE), high-density (HDPE), their blends at various UHMWPE/HDPE ratios were prepared via compression molding injection for thermal, rheological, mechanical characterization. A twin-screw extruder with either a tapered die air-cooling or regular was used to compound extrude the materials prior pelletization molding. T...