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Category: Application Notes

 

Inline Roughness Inspection Using Chromatic Confocal Optics

Inline roughness inspection of surface defects derive from materials processing and product manufacturing. In-line surface quality inspection ensures the tightest quality control of the end products. The Nanovea 3D Non-Contact Profilometer utilize chromatic confocal technology with unique capability to determine the roughness of a sample without contact. Multiple profiler sensors can be installed to monitor the roughness and texture of different areas of the product at the same time. The roughness threshold calculated real-time by the analysis software serves as a fast and reliable pass/fail tool.

Watch Video or Read Report Inline Roughness Inspection Using Chromatic Confocal Optics

Micro Scrape Test Of Polymeric Coating

Scratch testing has developed to be one of the most widely applied methods to evaluate the cohesive and adhesive strength of the coatings. The critical load, at which a certain type of coating failure occurs as the applied load progressively increases, is widely regarded as a reliable tool to determine and compare the adhesive and cohesive properties of the coatings. The most commonly used indenter for scratch testing is the conical Rockwell diamond indenter. However, when the scratch test is performed on the soft polymeric coating deposited on a brittle substrate such as silicon wafer, the conical indenter tends to plough through the coating forming grooves rather than creating cracks or delamination. Cracking of the brittle silicon wafer takes place when the load further increases. Therefore, it is vital to develop a new technique to evaluate the cohesion or adhesion properties of soft coatings on a brittle substrate.

Micro Scrape Test Of Polymeric Coating

Abrasion Resistance Of Sandpaper Using Tribometer

Abrasion resistance and the effectiveness of sandpaper is often determined by their abrasion performance under different conditions. The grit size, i.e. the size of the abrasive particles embedded in the sandpaper, determines the wear rate and the scratch size of the material being sanded. Sandpapers of higher grit numbers possess smaller particles, leading to lower sanding speed and finer surface finish. Sandpapers of the same grit number made of different materials can behave differently under the dry or wet condition. Reliable tribological evaluation is needed to ensure that the manufactured sandpapers possess desired abrasion behavior under the application conditions. It allows users to quantitatively compare the wear behaviors of different types of sandpapers in a controlled and monitored manner and to select the best candidate for the target application.

Abrasion Resistance Of Sandpaper Using Tribometer

ASTM D7187 Temperature Effect Using Nanoscratching

ASTM D7187, the resistance of the paint to scratch and mar plays a vital role in its end use. Automotive paint susceptible to scratches makes it difficult and costly to maintain and repair. Different coating architectures of the primer, basecoat, and clearcoat have been developed to achieve the best scratch/mar resistance. Nanoscratch testing has been developed as a standard test method to measure the mechanistic aspects of scratch/mar behavior of paint coatings as described in ASTM D7187. Different elementary deformation mechanisms, namely elastic deformation, plastic deformation and fracture, occur at different loads during the scratch test. It provides a quantitative assessment of the plastic resistance and fracture resistance of the paint coatings.

ASTM D7187 Temperature Effect Using Nanoscratching

Paint Drying Morphology Monitoring Using 3D Profilometry

Paint is usually applied in a liquid form and progressively dries into a solid. The drying process involves evaporation of the solvent and formation of a solid film. The paint surface progressively changes its shape and texture during the drying process. Different surface finish and texture can be developed by using miscellaneous additives to modify the surface tension and flow properties of the paint. However, undesired failures of the paint may occur in the cases of bad paint recipe or improper treatment of the surface. Accurate in situ monitoring of the shape evolution during the paint drying period can provide direct insight into the drying mechanism. Moreover, real-time evolution of surface morphologies is very useful information in various applications, such as 3D printing. The Nanovea 3D Non-Contact Profilometer measures the surface morphology of materials without touching the sample, avoiding any shape alteration which may be caused by contact technologies such as sliding stylus.

Paint Drying Morphology Monitoring Using 3D Profilometry

Industrial Coating Scratch & Wear Evaluation

The wear process of the acrylic urethane floor paints with different topcoats is simulated in a controlled and monitored manner using the Nanovea Tribometer as shown in Fig. 1. Micro scratch testing is used to measure the load required to cause cohesive or adhesive failure to the paint. In this study, we would like to showcase that Nanovea Mechanical Tester and Tribometer are ideal tools for evaluation and quality control of commercial floor and automotive coatings.

Industrial Coating Scratch & Wear Evaluation

Textile Abrasion Wear By Tribometer

The measurement of textile abrasion resistance of fabrics is very challenging. Many factors play a role during the test, including the mechanical properties of the fibers, the structure of the yarns and the weave of the fabrics. This may result in poor reproducibility of test results and create difficulty in comparing values reported from different laboratories. Wear performance of the fabrics is critical to the manufacturers, distributors, and retailers in the textile production chain. A well-controlled quantifiable and reproducible Tribometer wear resistance measurement is crucial to ensure reliable quality control of the fabric production.

Textile Abrasion Wear By Tribometer

Textile Texture Measurement Using 3D Profilometry

Understanding textile texture, consistency and patterns of the fabrics allows the best selection of processing and control measures. Traditional stylus-based profilometers determine the surface morphology of the coatings by sliding in contact across the measured surface, which may deform the soft fabric and induce inaccurate measurement. The Nanovea 3D Non-Contact Profilometer utilize chromatic confocal technology with unmatched capability to provide a comprehensive analysis of the surface feature of fabrics, making it an ideal tool for reliable product inspection and quality control.

Textile Texture Measurement Using 3D Profilometry

Creep Deformation of Polymers by Nanoindentation

Creep deformation often occurs due to the lack of alertness of the time-dependent creep behavior of the polymer materials used under specific service conditions. As a result, it is important to develop a reliable and quantitative test of the viscoelastic mechanical behaviors of the polymers. Nanoindentation using the Nanovea Mechanical Tester applies the load by a high-precision piezo and directly measures the evolution of force and displacement in situ. The combination of accuracy and repeatability makes it an ideal tool for creep measurement.

Creep Deformation of Polymers by Nanoindentation

Tribology of Polymers by Tribometer

Tribology of Polymers are commonly seen for tribological applications, such as tires, bearings and conveyor belts. Different wear mechanisms occur depending on the mechanical properties of the polymer, the contact conditions, and the properties of the debris or transfer film formed during the wear process. In order to ensure that the polymers possess sufficient wear resistance under the service conditions, reliable and quantifiable tribological evaluation is in need. It allows us to quantitatively compare the wear behaviors of different polymers in a controlled and monitored manner and to select the best candidate for the target application. The Nanovea Tribometer offers repeatable wear and friction testing using ISO and ASTM compliant rotative and linear modes, with optional high temperature wear and lubrication modules available in one pre-integrated system. This unmatched range allows users to simulate different work environment of the polymers including concentrated stress, wear and high temperature, etc.

Tribology of Polymers by Tribometer

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