With the rapid development of 3D printing, precision electronics, automobile manufacturing and other fields, low shrinkage UV resin has become a hot topic in materials science due to its unique performance advantages. This article will analyze this key material in depth from multiple dimensions such as technical principles, core advantages, application scenarios and purchase guides, providing practical reference for industry users.
1. The core advantages of low shrinkage UV resin
The shrinkage rate of low-shrinkage UV resin during curing is significantly lower than that of traditional epoxy resin (shrinkage rate 3-5%), and some advanced formulas can even control the shrinkage rate below 0.24%. This feature is due to its molecular structure design:
Flexible segment regulation: By adding 10-30% of flexible segment resin (such as silicone-modified acrylate, polyether polyurethane acrylate), the curing internal stress can be effectively released and the volume shrinkage can be reduced.
Composite formula optimization: For example, the combination of polyurethane acrylic resin and alicyclic polycyclic acrylic resin can ensure hardness (Shore D 85-90) and reduce deformation.
Low oxygen inhibition technology: High molecular weight UV resin (such as UV-PSA) has high viscosity and few functional groups, and the oxygen inhibition effect is weak during curing, which further reduces shrinkage.
2. Key Technology Breakthroughs and Innovative Formulas
Application of low shrinkage agents
Adding thermoplastic resins (such as polystyrene and polycaprolactone) can neutralize the curing shrinkage of unsaturated polyesters and is widely used in SMC manufacturing. Mercapto-modified polymers are used as auxiliary resins to improve toughness and reduce shrinkage.
Examples of high-performance formulations
3D printing: High-precision resins (such as Standard Resin) have a shrinkage rate as low as 0.3%, and have both high hardness (Shore D 85) and high temperature resistance (heat deformation temperature 70-80°C), which are suitable for mass production of industrial parts.
Optical adhesives: adhesive achieves a linear shrinkage rate of 1.2% by modifying polyurethane acrylate while maintaining a low refractive index of 1.4, which is suitable for precision optical components such as camera modules.
Automotive parts: polyurethane acrylate oligomers are designed for low shrinkage and high adhesion scenarios and are used for bonding metals to composite materials.
Application areas:
3D printing and rapid prototyping
Electronics and optical manufacturing
Automotive and aerospace
Low shrinkage UV resins are driving the manufacturing industry to upgrade towards high efficiency and environmental protection with their precision molding capabilities and adaptability to multiple scenarios. In the future, with the integration of material innovation and process, this field will surely give rise to more breakthrough applications. We will do our best to research and develop the latest UV resins to provide our customers with a better resin product.
