In recent years, with the enhancement of food safety awareness and the in-depth advancement of sustainable development strategies, the safety and environmental friendliness of Food Contact Materials (FCMs) have become the focus of global attention. China has increasingly tightened safety supervision over food contact materials, and its standard system has been continuously improved. On September 16, 2025, five national standards for the determination of food contact materials under the GB 31604 series will be formally implemented. These new standards not only provide a more scientific testing basis for traditional food contact materials but also pose new challenges to the emerging post-consumer recycled plastics (PCR).

In the field of plastic mechanical property testing, impact strength is a core indicator for evaluating material toughness, which is directly related to the impact resistance and safety reliability of plastic products in practical applications. As the mainstream method for measuring plastic impact strength, pendulum impact testing has its result accuracy restricted by multiple factors, and the selection of hammer weight (corresponding to pendulum energy) is an easily overlooked yet crucial link among them.

In recent years, quantitative nuclear magnetic resonance (QNMR) technology has been increasingly widely applied in the standards for characterizing the microstructure of polymeric materials. What is the principle of QNMR? What is its specific operational procedure? And how is it specifically applied in material structure characterization? This article will introduce the role of QNMR through a case study, where a dual-chain catalyst is used to control the degree of long-chain branching (LCB) in polyethylene, thereby influencing the macroscopic physical properties of the material.

In the field of plastic processing, melt viscosity and melt strength are two crucial yet frequently confused core parameters. They are like the "blood" and "bones" in the plastic processing process, jointly determining the processing behavior of materials and the final product performance. A comprehensive understanding of the essential differences, interactions, and accurate testing methods between the two is of vital guiding significance for optimizing production processes, improving product quality, and developing new materials. This article will delve into the basic concepts of melt viscosity and melt strength, their application differences in processing, testing technologies, and their synergistic effects in actual production, providing a systematic reference framework for practitioners in the plastic industry.

In the world of injection molding, the performance parameters of plastic materials are by no means dull laboratory data—they are the "soul map" that runs through product design, mold manufacturing, process setting, and quality control. Behind every set of numbers lies the behavioral code of the material under specific conditions; a deep understanding and flexible application of these parameters are the keys to achieving efficient, stable, and high-quality production. This article will take a number of core performance parameters as clues to systematically elaborate on their guiding value for the entire injection molding process.

The specific heat capacity is the amount of heat absorbed or released when a unit mass of a substance increases or decreases in temperature by 1℃, which reflects the material's ability to absorb or release heat.

Plastics are widely used in the automotive industry. Currently, a single automobile consists of approximately 30,000 parts, one-third of which are made of plastics. In total, about 39 different types of basic plastics and polymers are used in automobile manufacturing.

Thermal analysis technology covers a wide range of fields, with the chemical field taking the lead. It has been widely applied in physics, geoscience, biochemistry, pharmacy, and other domains. This article mainly introduces the influencing factors in the process of Differential Scanning Calorimetry (DSC) as well as application examples.

The S-N curve, also known as the Wöhler curve, is a fundamental tool for describing the fatigue performance of materials in the field of materials science and engineering. It graphically illustrates the number of cycles (N) that a material can withstand under cyclic stress (S). As a core basis, it is widely used in structural fatigue life prediction, reliability design, and material selection.

Low-Pressure Test Chambers are mainly used in the aerospace, aviation, information technology, electronics, and other fields. They are designed to conduct environmental adaptability and reliability tests on instruments, electrical products, materials, components, and equipment under the single or combined effects of low pressure, high temperature, and low temperature. Additionally, they can measure the electrical performance parameters of test specimens while energizing them. Adopting an integrated combined structure, a low-pressure test chamber consists of three main parts: a thermal insulation cabinet (pressure-bearing structure) located at the front, a refrigeration and vacuum unit at the rear, and an electrical control system mounted on the main door of the test chamber.

Plastics, as materials for friction components, boast excellent advantages such as superior friction reduction and wear resistance, chemical corrosion resistance, tolerance to foreign objects, sound and vibration absorption, and self-lubrication. Therefore, plastics are increasingly widely used in friction systems across machinery manufacturing, transportation, chemical engineering, and instrumentation industries. They can replace a large amount of precious non-ferrous metals, simplify processing procedures, reduce costs, improve labor productivity, and extend the service life of machinery. Friction performance mainly refers to the friction coefficient of the material, while wear performance primarily refers to the continuous loss of the material's surface during the friction process.

Stuck on formulations? Troubled by abnormal performance? Confused by updated standards? Unable to respond to customers' doubts? ... In the world of polymer materials, is there always some "roadblock" problem in every step of R&D, production, quality control, and procurement that makes you rack your brains and lose sleep? You search hard in the ocean of information, but can't find the authoritative answer that "just hits the spot"?