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Characteristics of epoxy resin

Characteristics of epoxy resin

There are many types of epoxy resins, including bisphenol A-type epoxy resins and alicyclic epoxy resins, each with its own distinctive properties. As a polymer material that demonstrates outstanding performance across a wide range of fields, epoxy resin highlights its unique advantages when faced with diverse application scenarios and varying performance requirements. The diversity, flexibility, and high adaptability of epoxy resin curing systems allow for the precise design of optimal formulations tailored to specific performance and process requirements.

03

2024

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07

Why does paper shrink and change in UV printing?

Why does paper shrink and change in UV printing?

UV printing is an innovative printing process that uses ultraviolet light to rapidly dry and cure inks. Specifically, when ink containing a photosensitizer is exposed to a UV light source, the photosensitizer becomes excited, triggering a polymerization reaction between the resin and monomers in the ink. This reaction quickly forms a dense, high-hardness film, enabling the ink to dry swiftly and adhere firmly to the surface of the substrate. During UV printing, paper may undergo shrinkage or expansion, which can not only distort the accuracy of the printed image and reduce the overall aesthetic appeal of the print but also adversely affect subsequent processes such as die-cutting, creasing, and hot stamping, thereby increasing operational complexity and lowering the yield of qualified finished products.

02

2024

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07

A Detailed Explanation of the One-Step and Two-Step Methods for Epoxy Resin Synthesis

A Detailed Explanation of the One-Step and Two-Step Methods for Epoxy Resin Synthesis

The common synthesis methods for epoxy resins include the phenolphthalein method, the aromatic amine method, the acid-catalyzed method, the propylene oxide method, the one-step method, and the two-step method. Among these, the one-step method and the two-step method are the primary synthesis approaches, each with its own distinct characteristics and advantages.

01

2024

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07

The process of UV-CIPP pipe rehabilitation

The process of UV-CIPP pipe rehabilitation

The ultraviolet light-curing in-situ pipe rehabilitation technology (UV-CIPP) is an innovative method for underground pipe repair. It employs mechanical pulling to insert a flexible hose pre-soaked with photosensitive resin into the pipe to be repaired. Compressed air is then used to press the hose tightly against the inner wall of the pipe. Subsequently, ultraviolet light is applied to cure the resin material, thereby creating a strong and durable liner—a new pipe—inside the existing pipeline. The UV-CIPP technology ingeniously combines light-curing technology with the in-situ curing process (CIPP), enabling efficient and precise repairs of damaged or leaking pipes without disturbing the ground surface. This trenchless repair technique significantly enhances repair efficiency and represents a highly effective and environmentally friendly approach to underground pipe rehabilitation.

29

2024

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06

UV-CIPP Liner Pipe Rehabilitation Construction Process

UV-CIPP Liner Pipe Rehabilitation Construction Process

The CIPP (Cured-In-Place Pipe) liner rehabilitation technology originated in the United Kingdom during the 1970s. As a trenchless rehabilitation method, CIPP was initially designed for lining and rehabilitating drainage pipes, water supply pipes, gas pipelines, and other similar conduits. This technology is suitable for renovating and rehabilitating pipes with diameters ranging from 100 mm to 1,500 mm—and can even be used to repair extremely large pipes exceeding two meters in diameter. The materials of the existing pipes—including cast iron, steel, concrete, and plastics—demonstrate the broad applicability of CIPP technology. Starting in the 1980s, UV-CIPP technology began to be adopted in developed countries such as the UK, the U.S., Germany, and Japan. This advanced technique uses ultraviolet light to cure resin-soaked hoses that have been pulled into the existing pipe, forming a durable inner pipe lining. Compared to traditional construction methods, UV-CIPP is more convenient, faster, and has a smaller environmental impact, gradually gaining widespread adoption around the world.

27

2024

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06

A Brief Analysis of the Ground State and Excited State

A Brief Analysis of the Ground State and Excited State

In physics and chemistry, the ground state refers to the lowest-energy state of a system, whereas an excited state is the condition in which electrons are promoted to higher energy levels after absorbing energy. For atoms or molecules, in the ground state, electrons move in orbitals closest to the nucleus; in an excited state, however, electrons have jumped to orbitals with higher energy levels. Such transitions are typically accompanied by the absorption or emission of energy—for example, through the absorption or emission of photons.

26

2024

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06

What is the hot stamping printing process?

What is the hot stamping printing process?

Hot foil stamping is a common printing process that uses thermal energy to roll metallic or colored foils onto the surface of printed materials, creating effects such as metallic luster, colorful patterns, and text. Typically, hot foil stamping requires a gilding machine or a hot stamping machine, which places the metallic or colored foil precisely at the desired location and then applies heat and pressure to bond the foil firmly to the surface of the printed material. Due to the specialized equipment involved, hot foil stamping tends to be relatively expensive. However, its high-quality and precise results make this printing technique highly favored in the premium market and for high-end products.

25

2024

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06

Application of UV Technology in Cold-Stamping Printing

Application of UV Technology in Cold-Stamping Printing

In the printing industry, cold foil stamping is a special printing process that, thanks to its distinctive decorative effects and textures, is widely used in the production of various printed materials. Cold foil stamping is a printing technique that uses ink to adhere cold foil metallized film—except for the base layer—to the surface of the substrate. This technology does not require heating; instead, it achieves the foiling effect through the action of an adhesive. Cold foil stamping offers several advantages, including low plate-making costs, high stamping precision, large image and text areas, a wide range of applicable substrates, ease of implementing “foiling before printing,” and compatibility with inline production processes. It is extensively used in fields such as foil stamping on paper products, textiles, decorative materials, and plastic products. In particular, when processing materials that are prone to deformation under heat, cold foil stamping demonstrates its unique advantages.

24

2024

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06

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