FYI Tester Instrument

  Universal Testing Machines (UTMs) are widely used for tensile testing of metals, rubber, plastics, and other engineering materials. With appropriate fixtures, the same machine can also be used for compression, flattening, and bending tests. Field statistics show that approximately two thirds of UTM failures are not caused by the machine itself, but by improper operation and insufficient maintenance. Based on practical experience, this document outlines the correct operation, routine maintenance, and key precautions for the  Universal Testing Machine , with tensile testing taken as a representative example. Operation of the Universal Testing Machine and Key Precautions Before any test is conducted, the machine itself must be confirmed to be in proper working condition. The testing machine shall be periodically calibrated in accordance with JJG 475-2008 “Verification Regulation of Electronic Universal Testing Machines” by an authorized metrology body. Only machines that have p...

  Have you ever wondered where do all the threads for Nylon, Polyethene, and PET come from? You’ve seen them in fabric labels, but to produce these industrial fabrics and plastics, you’d use a process called melt spinning. Melt spinning is used to produce synthetic fibers, multifilament yarns, microfibers, and even medical textiles. Melt spinning machines rely on rapid cooling of thin fibers to produce continuous filaments and metal ribbons. What Is Melt Spinning? Melt spinning is the most popular method to produce fibers and metal ribbons. Let’s break down the metal spinning process: In metal spinning, you heat the material until it reaches a molten state, then force it through a spinneret or a cooling wheel. The most crucial step is the instant transition from liquid to solid that gives long, uniform fibers that maintain the desired chemical composition. Materials Used in Melt Spinning If you think any material can be made into fibers using melt spinning, you’d be wrong because t...

Carbon black is one of the most commonly used additives for UV resistance and weathering stabilization in polyolefin materials. Its content not only directly affects the performance of pipes and fittings, but also determines the comparability of test data and the consistency of compliance when product standards reference specific test methods. With GB/T 13021 being upgraded from the earlier single-method framework to the 2023 edition and becoming identical to ISO 6964:2019, China’s testing and quality-control system has entered a new stage in terms of method selection, key parameter settings, and mutual recognition of results with international standards. To facilitate an accurate understanding of the differences among standards, this paper takes GB/T 13021-2023 as the main line, compares the key differences among ISO 6964:2019, ASTM D 1603-20, and ASTM D 4218-20, and discusses how these differences affect test execution and data interpretation. Comparison of the current status of dome...

A  wet spinning machine  is used to form fibers from a polymer solution (often called a spinning dope) by extruding it through a spinneret directly into a coagulation bath. In that bath, the polymer precipitates and solidifies into filaments, which are then washed, drawn, heat-treated, and wound into a usable fiber format. Wet spinning remains essential for polymers that cannot be melt-spun (because they degrade before melting) and for applications that demand precise microstructure control—from high-performance technical yarns to regenerated cellulosics and specialty biomedical materials. Below is a practical, engineering-oriented overview of what wet spinning is, how the  wet spinning process  works on a wet spinning machine, which parameters most strongly influence performance, and how to think about sustainability and compliance when solvents and wastewater become part of the process reality. What Is Wet Spinning (and Why It Still Matters) Wet spinning is a solut...