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Analysis of the PVC Leather UV Roller-Coating Gloss Finish Project

Analysis of the PVC Leather UV Roller-Coating Gloss Finish Project

Polyvinyl chloride, abbreviated as PVC in English, is a polymer formed by the free-radical polymerization of vinyl chloride monomer (VCM) under the initiation of initiators such as peroxides and azo compounds, or through the action of light and heat. Homopolymers and copolymers of vinyl chloride are collectively referred to as vinyl chloride resins.

24

2017

/

05

UV LED Technology and Applications

UV LED Technology and Applications

An UV-LED (or UV Light Emitting Diode) is a solid-state semiconductor device that can directly convert electrical energy into ultraviolet light. It is a type of LED with a wavelength range of 10–400 nm, representing monochromatic invisible light typically below 400 nm. The wavelengths commonly used for curing applications are 365 nm and 395 nm. UV adhesives are generally cured using the 365 nm wavelength.

09

2016

/

11

Applications and Trends of 3D Ceramics in Mobile Phones

Applications and Trends of 3D Ceramics in Mobile Phones

Ceramic materials are a class of inorganic, nonmetallic materials made from natural or synthetic compounds through shaping and high-temperature sintering. A ceramic phone back cover is simply a phone back cover crafted from ceramic material. The term "3D" refers to a design that differs from "2D" and "2.5D." All phone back covers have a certain thickness; when the top and bottom surfaces are flat and parallel to each other, it’s referred to as 2D. If the top and bottom surfaces remain flat but the edges are polished into a curved shape that smoothly transitions from one surface to the other, it’s called 2.5D. In contrast, 3D glass no longer has flat top and bottom surfaces—instead, the edges typically feature a significant curvature, giving the entire structure a U-shaped profile.

01

2016

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11

A Big Comparison of Material Performance for Phone Cases

A Big Comparison of Material Performance for Phone Cases

The rapid growth of smartphones has driven the entire industry’s supply chain forward. Phone cases have evolved alongside the development of smartphones, and major manufacturers have produced a wide array of phone cases to meet users’ diverse needs. The market is flooded with an endless variety of phone cases, which can be overwhelming and confusing. Moreover, the quality of these cases varies widely. Among the many factors influencing people’s choice of phone cases, material is one of the most critical—its physical and chemical properties significantly impact the overall user experience.

21

2016

/

09

Liquid Optical Adhesive (LOCA)

Liquid Optical Adhesive (LOCA)

Liquid Optical Clear Adhesive (LOCA) is a specialized adhesive used for bonding transparent optical components. It is colorless and transparent, with a light transmittance of over 98%. It exhibits excellent bonding strength and can cure under either ambient or moderate temperatures. Additionally, it features low curing shrinkage and excellent resistance to yellowing.

07

2016

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09

Curing Mechanism of Epoxy Resins and Common Curing Agents

Curing Mechanism of Epoxy Resins and Common Curing Agents

The curing process of epoxy resin can be divided into three stages: the liquid stage, the gel stage, and the solid stage. In the liquid stage, the epoxy resin has not yet reacted with the curing agent and exists as a liquid mixture. During the gel stage, the epoxy resin gradually reacts with the curing agent, forming a gel-like state; the adhesive gradually loses its fluidity and its viscosity increases. In the solid stage, the curing process is complete, and cross-linking has formed a three-dimensional network structure, thereby enhancing its hardness and mechanical strength.

31

2016

/

08

Introduction to Polymerization Methods

Introduction to Polymerization Methods

In the industrial production of polymer compounds, the same polymer can be produced using several different polymerization methods. Among methods that yield products with identical performance, the one offering superior product quality, lower equipment investment, and reduced production costs will be developed. Other methods, by contrast, will gradually be phased out. The choice of polymerization method depends on the properties of the polymer.

26

2016

/

08

A Brief Discussion on Dual-Cure Systems

A Brief Discussion on Dual-Cure Systems

Since the curing process of UV-curable systems is initiated by light, UV-curable systems also have the following drawbacks: limited curing depth; difficulty in application to colored systems and opaque materials; and inability to cure objects with excessively complex shapes. To address these limitations, dual UV-curing systems have been developed, which combine UV curing with other curing methods. In such systems, the crosslinking or polymerization reaction is accomplished through two independent stages, each operating on a different reaction principle. UV light is used to rapidly set the system or achieve “surface dryness,” while a dark reaction ensures that the “shadowed” areas or inner layers are fully cured, reaching “full dryness.”

11

2016

/

08

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