📦2026 Chinese New Year Holiday & ProtoTi Shipping Schedule
Dear Valued Customer,
Thank you sincerely for your continued trust and support throughout the year 🙏 As the Chinese New Year approaches, order volumes naturally increase as we prepare for the holiday season.
For our team in China, the Chinese New Year is the most important time of the year—a moment after months of hard work to reunite with family and celebrate together 🧧🏮. We truly appreciate your understanding and support during this special period.
To help you plan ahead, please find our shipping arrangements below:
Orders placed before February 1st will be shipped by the cut-off date of February 11th.
Orders placed between February 2nd and February 4th may still be shipped before February 11th, depending on production capacity.
Orders placed on or after February 5th will require extended lead time and will be shipped gradually starting February 24th.
Please note that most manufacturers in China, including ProtoTi, will pause production from February 10th to February 23rd for the Chinese New Year holiday.
If the potential delay does not fit your schedule, please let us know as soon as possible. We will be happy to assist with a refund, provided the order has not yet entered production.
Once again, thank you for your understanding and for being a valued partner of ProtoTi. For any delayed orders, we will proactively provide individual updates with confirmed delivery timelines.
On behalf of the entire ProtoTi Global Business Team, we wish you and your family a joyful, healthy, and prosperous New Year 🎉✨
A research team from China’s Zhejiang University has developed an infinitely recyclable 3D printing resin based on a thermally reversible photo-click reaction. Led by PhD student YANG Bo and Professors XIE Tao and ZHENG Ning from the College of Chemical and Biological Engineering, the innovation supports ongoing efforts to advance a circular economy within additive manufacturing by enabling complete material recovery without compromising performance.
A Surprising Discovery in Thiol-Aldehyde Chemistry
Published in Science on April 11, the team describes how the breakthrough emerged unexpectedly during routine experimentation on photocurable 3D printing, in which production speed, material strength and resin costs were being tackled. While working with a thiol reagent, YANG Bo observed results that contradicted their initial hypothesis. “The reaction behaved the opposite of what we predicted,” he recalls. Further analysis revealed that a light-triggered click reaction had occurred between thiols and aldehydes—a process previously thought to require heat.
“This was the first time anyone showed that this reaction could occur rapidly under light,” says ZHENG Ning. He stressed this finding laid the foundation for a new class of recyclable, high-performance 3D printing resins.
Modular polymer network design. Image via ZJU.
Traditional 3D photoprinting depends on photopolymerizing (meth)acrylate monomers and cross-linkers, which form stable carbon–carbon bonds that are nearly impossible to reverse for recycling. In contrast, XIE Tao’s team designed a system that forms dithioacetal bonds—molecular “clips” that can be assembled under light and disassembled with gentle heat, allowing the material to revert to its base components.
“It’s like disassembling Legos,” explains XIE Tao. “The printed object can be recovered at the molecular level and reprinted again and again.”
A Modular, Tunable Resin Platform
The resin system’s modular design is one of its most promising features. By fine-tuning the polymer backbone, the researchers successfully created a range of materials—including elastomers, crystalline polymers, and rigid plastics—without sacrificing recyclability. Potential applications include lost-foam casting for metal parts and orthodontic aligners.
Infinitely Recyclable Resin. Photo via ZJU.
Our research has successfully overcome the longstanding trade-off between mechanical performance and closed-loop recyclability in photocurable 3D printing materials at the molecular level,” said XIE Tao. “By establishing a light-responsive dynamic dithioacetal chemistry system, we offer a novel molecular design strategy, providing meaningful insights for advancing sustainable manufacturing technologies.”
Recycling Efforts in Additive Manufacturing
This week, global automotive manufacturer BMW Group announced it is advancing its circular economy goals by repurposing waste from its additive manufacturing processes. At the Additive Manufacturing Campus in Oberschleißheim, Germany, and other sites worldwide, used 3D printing powder and components are recycled into filament for the Fused Filament Fabrication (FFF) process and granulate for Fused Granulate Fabrication (FGF), enabling the creation of new tools and parts.
This project will focus on developing methodologies for reutilizing and recycling AM materials. It will explore strategies for material recovery, lifecycle assessments, and frameworks to help manufacturers adopt eco-friendly practices without compromising part performance or reliability. The research will build on ASTM’s expertise in AM standards, qualification, certification, and sustainability, ensuring that the findings contribute to industry-wide best practices and regulatory guidelines.
Step into a modern kitchen, open a refrigerator, walk into an office building elevator, or observe medical equipment—in these seemingly different scenarios, one material silently underpins our lives: Stainless Steel 304. As the most common and widely used grade of austenitic stainless steel, SS304 has become an “invisible champion” in industrial manufacturing and daily life, thanks to its excellent corrosion resistance, good formability, and outstanding hygienic properties.
Since stainless steel was invented in the early 20th century, 304 stainless steel has evolved into the world’s most popular stainless steel variety, accounting for approximately 50% of the stainless steel market share. From aerospace to food processing, from architectural decoration to medical devices, this alloy occupies an irreplaceable position in modern materials science due to its unique combination of properties. This article will provide a comprehensive analysis of the chemical composition, mechanical properties, application fields, processing techniques, and selection guidelines for 304 stainless steel, offering a thorough reference for engineers, designers, purchasers, and general consumers.
In the high-stakes world of pediatric cardiology, surgeons often operate with limited information, navigating tiny, complex, and uniquely malformed hearts.
