The 9th "Bonding Day" Bonding & Composite Technology Exchange Conference (Part 1)

On May 20, 2024, the two-day ninth "Bonding Day" Bonding & Composite Technology Exchange Conference opened successfully. The event was held at Nanjing Platinum Hanjue. More than 350 people participated in this high-level technical exchange conference, involving guests from 9 major industries and more than 120 companies.

Please take a sneak peek at the live action at the conference:

Summary of conference speech

 Dr. Zhang Jingfen, general manager of Yifa New Materials Research Institute, first made an opening speech for the conference. The essence of bonding is strong bonding and long-term durability. Yifa sets the stage and everyone creates together. The bonding days are getting better and better every year. She announced that the theme of this conference is: high standards, high quality and high value!

The keynote speech of the Bonding Day was given by Prof. Dr. Andreas Gross, director of the Fraunhofer IFAM Institute in Germany, initiator of the DIN6701 and DIN 2304 standards, and chairman of the standards committee: 9R instead of R9 9 instead of just 9th. Professor Gross introduced in detail the development trend of bonding technology under the framework of circular economy. The circular economy is not just about recycling, but an alternative to the traditional linear economy, keeping recyclable materials in the economic cycle for as long as possible. As the most popular connection technology in the 21st century, bonding technology should fully consider environmental compatibility on the basis of product safety. An important mission of all bonding practitioners is to focus on economic development and more importantly, the long-term future of mankind.

Dr. Zhang Jingfen from Yifa Bonding & Composite Material Research Institute gave a keynote report on "Yifa Scientific Research and DIN SPEC 35255 Composite Material Standard". Based on actual cases, Dr. Zhang introduced in detail the intelligent adhesive selection platform, bonding simulation and calculation, adhesive selection, bonding process verification, bonding process evaluation, bonding failure analysis, bonding joint life prediction, and bonding technology. We have formed unique R&D capabilities in ten directions including welding, EN17460/DIN6701-3 and composite product development and trial production. DIN SPEC 35255 composite material standard, DIN6701 standard and DIN2304 standard are of the same origin. Yifa Bonding will actively respond to the call of "supporting high-quality development with standard upgrades" and promote composite material standards.

Wang Gong, a bonding expert from CRRC Corporation and from CRRC Tangshan Locomotive and Rolling Stock Co., Ltd., shared with everyone the topic of his speech: Rail Vehicle Adhesive Application and Bonding Quality Control. Wang Gong systematically introduced the use of adhesives in rail vehicles. At the same time, he analyzed in detail the causes and solutions of bonding failure cases that are often encountered in rail vehicles based on actual cases. He also introduced the implementation and implementation of bonding quality control technical means and their implementation. Connect quality digital management.

Chao Gaoyi, senior lecturer and director of the Testing Center of Yifa Bonding & Composites Research Institute, gave a speech entitled: New requirements for verification of the EN17460 system. After the bonding standards are upgraded from the DIN6701 series standards to the EN 17460 European standard, the new requirements for bonding products include design verification and process verification in the design-manufacturing-mass production process. Chaogong introduced in detail two specific implementation plans for verification and the test methods involved in the verification process based on actual cases. Yifa Bonding has accumulated rich experience in the field of design verification and process verification, and has cooperated with many companies to complete verification projects based on DIN6701-3 and EN17460.

After the wonderful speeches by experts, there was an "Expert Discussion" session, where members of the CRRC Bonding Expert Group shared and discussed issues of concern to the rail transit industry. The experts participating in the meeting shared their experience in bonding technology based on their own bonding experience.

The title of the speech given by Dean Yang of the Bus Research Institute of CRRC Times Electric Vehicle Co., Ltd. was: The construction and application of the bonding system in the bus industry. Bus bonding has some common problems in the bonding field, such as bonding degumming, seal leakage and aging effects. Through the construction and application of the DIN2304 bonding quality system in the passenger car industry, quality control is simultaneously carried out from six aspects: human, machine, material, method and environmental testing, and the entire bonding process is controlled, thus solving the above bonding failures. question.

The topic shared by Mr. Zhang, the deputy general manager of Zhengzhou Zhongyuan Silande High-Tech Co., Ltd. is: High-quality application of elastic bonding and sealing materials. Mr. Zhang gave an overview of the performance characteristics of commonly used sealants and shared two high-performance sealants from Zhongyuan Silan: silicone modified polyether sealant and butyl hot melt adhesive. Silicone-modified polyether does not require activators and primers, has good compatibility with PU glue, has excellent sprayability, and the surface will not turn black after long-term use. Butyl hot melt adhesive has excellent performance in heat resistance, aging resistance, sealing performance, vibration and noise reduction, etc. Mr. Zhang’s introduction will help everyone make the choice of adhesive later.

The topic of Mr. He's speech of Tasting and Testing Technology (Suzhou) Co., Ltd. was: Fire prevention issues in the application of adhesives in rail vehicles. Mr. He first shared that the rolling stock fire protection project covers mainstream standards at home and abroad. As an important connection technology, bonding technology is increasingly used in the field of rail transit, but it also brings potential fire protection problems. Mr. He introduced the fire protection requirements for different parts of rail vehicles in detail based on the European standard EN45545-2.

Yan Gong, the bonding supervisor of CRRC Qishuyan Locomotive Co., Ltd., shared the topic: analysis and treatment of typical cases of water leakage from the front window of a locomotive. Yan Gong shared cases of water leakage in front windows with strips, aluminum frames and adhesives. In-depth inspection describes the process of failure analysis. It has very good guiding significance for everyone on how to solve the problem of bonding failure in the future.

The title of the speech given by Director Wang of the Engineering Center of Zhuzhou Times New Material Technology Co., Ltd.: The latest progress in wind power blade bonding technology. Wind turbine blade-related bonding technology has gone through a manual stage, a tooling-assisted stage and a semi-automatic stage. Mold bonding is one of the key processes in blade manufacturing, and it is very important to choose the appropriate adhesive. The curing degree of the adhesive layer, the thickness of the adhesive layer and the width of the bonding surface are key indicators in the blade production process, and can be controlled using non-destructive testing and simulation calculations.

Li Gong from the Supplier Management Office of CRRC Zhuzhou Electric Locomotive Co., Ltd. brought the topic: Discussion on the testing of adhesive products for rail transit vehicles. Li Gong introduced different testing items and selected appropriate testing items and frequencies based on the safety level of the bonded joints. Li Gong's speech shared in detail Zhuzhou Machinery's performance testing methods and capabilities for adhesive products, and opened up our understanding of incoming material inspection methods for adhesive products.

Wei Gong, senior engineer of CRRC Nanjing Puzhen Rolling Stock Co., Ltd., shared the topic: Requirements for the application of environmentally friendly adhesives for rail transit vehicles. Both the Railway Administration and the Railway Bureau have very clear requirements for the air quality inside motor buses. Therefore, during the adhesive selection process, special attention needs to be paid to controlling environmental protection requirements from the source of adhesive procurement.

As the "Bonding Day" forum's influence has increased, it has attracted first-class bonding-related companies at home and abroad to participate in the exhibition, including glue companies, surface treatment companies, and testing institutions. They all brought competitive products and the latest technology to the scene. Their booths were crowded and the exchanges were lively.

Welcome dinner highlights

 At the welcome dinner on the first day of the conference, since most of the guests attending the meeting were EAS (European Adhesive Technicians) and EAE (European Adhesive Engineers) students trained by Yifa, the dinner was like a large-scale class reunion, and students met and drank. Extremely affectionate! New members and old members got to know each other, and the atmosphere at the dinner was extremely lively!

At the same time, the prizes during the lottery and Q&A sessions at the dinner were particularly exciting. Guests were eager to try and participated in the event one after another. The scene was very lively!

This is the live report of the first day of the conference. There will be many heavyweight speakers on the second day. Please stay tuned for the live report of the conference~